1
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Zhao L, Chen H, Sun Y, Wei H. A novel strategy to promote sludge solubilization and short-chain fatty acid production by coupling thermal hydrolysis and sodium thiosulfate pretreatment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2025; 387:125930. [PMID: 40408854 DOI: 10.1016/j.jenvman.2025.125930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2025] [Revised: 05/15/2025] [Accepted: 05/20/2025] [Indexed: 05/25/2025]
Abstract
Thermal hydrolysis (TH) technology is promising for sludge pretreatment, but the high cost and the generation of refractory substances limit its application. In this study, sodium thiosulfate (STS) was innovatively combined with TH pretreatment to improve the anaerobic fermentation efficiency of sludge. TH-STS pretreatment (140 °C, 0.132 g/g TSS) increased sludge solubility by 33.4 % and increased short-chain fatty acid (SCFA) production to 1.86 times that of the control group. TH effectively stripped the extracellular polymeric substances, and STS subsequently lysed the cells through its reducing power. TH-STS pretreatment promoted SCFA accumulation by increasing the activity of key enzymes and enriching hydrolyzing and acidifying bacteria. In addition, TH-STS pretreatment increased the activity of the electron transport system, which positively promoted the biotransformation of SCFAs. This study reveals that STS and TH pretreatment have a synergistic effect, providing an effective method for improving sludge pretreatment and resource recycling.
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Affiliation(s)
- Lina Zhao
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, China
| | - Hongbo Chen
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, China.
| | - Yihu Sun
- Hunan Diya Environmental Engineering Co., Ltd., Changsha, 410007, China
| | - Huibin Wei
- Hunan Diya Environmental Engineering Co., Ltd., Changsha, 410007, China.
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2
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Ennouri H, Manai I, Ennouri H, Zahedi Diaz S, Fernández Güelfo LA, Solera R, Hamdi M, Bouallagui H. Effect of solid-state fermentation by a novel soft-rot fungus Cheatomium globosum IMA1 on the anaerobic co-digestion performances of waste activated sludge and municipal solid waste. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 371:123189. [PMID: 39488957 DOI: 10.1016/j.jenvman.2024.123189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2024] [Revised: 10/18/2024] [Accepted: 10/31/2024] [Indexed: 11/05/2024]
Affiliation(s)
- Hajer Ennouri
- The Higher Institute of Applied Biological Sciences of Tunis, LR: BeB, ISSBAT, Tunis, Tunisia; Faculty of Marine and Environmental Sciences, University of Cádiz, Pol. Río San Pedro s/n, 11510, Puerto Real, Cádiz, Spain.
| | - Imene Manai
- National Institute of Applied Sciences and Technology, Carthage University, LR: LETMi, INSAT, B.P. 676, 1080, Tunis, Tunisia
| | | | - Soraya Zahedi Diaz
- Faculty of Marine and Environmental Sciences, University of Cádiz, Pol. Río San Pedro s/n, 11510, Puerto Real, Cádiz, Spain
| | | | - Rosario Solera
- Faculty of Marine and Environmental Sciences, University of Cádiz, Pol. Río San Pedro s/n, 11510, Puerto Real, Cádiz, Spain
| | - Moktar Hamdi
- National Institute of Applied Sciences and Technology, Carthage University, LR: LETMi, INSAT, B.P. 676, 1080, Tunis, Tunisia
| | - Hassib Bouallagui
- National Institute of Applied Sciences and Technology, Carthage University, LR: LETMi, INSAT, B.P. 676, 1080, Tunis, Tunisia
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3
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Luo J, Zhao C, Huang W, Wang F, Fang F, Su L, Wang D, Wu Y. A holistic valorization of treasured waste activated sludge for directional high-valued products recovery: Routes, key technologies and challenges. ENVIRONMENTAL RESEARCH 2024; 262:119904. [PMID: 39270963 DOI: 10.1016/j.envres.2024.119904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2024] [Revised: 08/26/2024] [Accepted: 08/30/2024] [Indexed: 09/15/2024]
Abstract
Global energy shortages and environmental crises underscore the imperative for a circular economy to tackle resource scarcity and waste management. The circular economy model encourages the recovery and reuse of valuable materials, reducing reliance on finite natural resources and lessening the environmental impact of waste disposal. Among urban organic solid wastes, waste activated sludge (WAS) emerges as a potent reservoir of untapped resources (including various inorganic and organic ones) offering significant potential for recovery. This review delves into a comprehensive analysis of directional valorization of WAS to recover high-valued products, including the inorganic matters (i.e. phosphorus, ammonia nitrogen, and heavy metals), organic resources (i.e. extracellular polymers like alginate and protein, volatile fatty acid, methane, hydrogen, and plant growth hormones) and reutilization of WAS residues for the preparation of adsorbent materials - the biochar. Moreover, the main recovery methodologies associated influencing parameters, product application, and attendant challenges for those diverse recovered resources are unveiled. Future research are encouraged to prioritize the development of integrated multi-resource recovery approaches, the establishment of regulatory frameworks to support resource recovery and product utilization, and the systematic evaluation of disposal strategies to foster a more sustainable and resource-efficient future. This work illuminates avenues for sustainable WAS management with high-valued resource recovery towards circular economy.
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Affiliation(s)
- Jingyang Luo
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 1 Xikang Road, Nanjing, 210098, China; College of Environment, Hohai University, 1 Xikang Road, Nanjing, 210098, China.
| | - Chenxin Zhao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 1 Xikang Road, Nanjing, 210098, China; College of Environment, Hohai University, 1 Xikang Road, Nanjing, 210098, China
| | - Wenxuan Huang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 1 Xikang Road, Nanjing, 210098, China; College of Environment, Hohai University, 1 Xikang Road, Nanjing, 210098, China
| | - Feng Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 1 Xikang Road, Nanjing, 210098, China; College of Environment, Hohai University, 1 Xikang Road, Nanjing, 210098, China
| | - Fang Fang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 1 Xikang Road, Nanjing, 210098, China; College of Environment, Hohai University, 1 Xikang Road, Nanjing, 210098, China
| | - Lianghu Su
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, China.
| | - Dongbo Wang
- College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha, 410082, China
| | - Yang Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
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Wang X, Huang S, Wang S, Chen S, Dong S, Zhu Y. Effect of D-limonene on volatile fatty acids production from anaerobic fermentation of waste activated sludge under pH regulation: performance and mechanisms. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 370:122828. [PMID: 39383742 DOI: 10.1016/j.jenvman.2024.122828] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2024] [Revised: 09/30/2024] [Accepted: 10/02/2024] [Indexed: 10/11/2024]
Abstract
D-limonene extracted from citrus peels possesses an inhibitory effect on methanogenic archaea. This study is aimed to bridge the research gap on the influence of D-limonene on volatile fatty acids (VFA) production from waste activated sludge (WAS) and to address the low VFA yield in standalone anaerobic fermentation of WAS. When the initial pH was not controlled, 1.00 g/g TSS D-limonene resulted in a VFA accumulation of 1175.45 ± 101.36 mg/L (174.45 ± 8.13 mgCOD/gVS). When the initial pH was controlled at 10 and the D-limonene concentration was 0.50 g/g TSS, the VFA accumulation reached 2707.44 ± 183.65 mg/L (445.51 ± 17.10 mgCOD/gVS). The pH-regulated D-limonene treatment enhanced solubilization and acidification, slightly inhibited hydrolysis, and significantly suppressed methanogenesis. D-limonene under alkaline conditions can increase the relative abundance of Clostridium_sensu_stricto, significantly enhancing acidification. Moreover, it markedly inhibited methanogenesis by particularly reducing the relative abundance of Methanothrix that was responsible for acetate consumption, thus favoring the accumulation of VFA. The research reveals the potential mechanism of pH regulation and D-limonene on anaerobic fermentation acid production, providing a theoretical basis for improving the acid production performance of the anaerobic fermentation of WAS.
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Affiliation(s)
- Xinyun Wang
- Jiangxi Province Key Laboratory of Water Ecological Conservation in Headwater Regions (2023SSY02031), Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Shifa Huang
- Jiangxi Province Key Laboratory of Water Ecological Conservation in Headwater Regions (2023SSY02031), Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Shihao Wang
- Jiangxi Province Key Laboratory of Water Ecological Conservation in Headwater Regions (2023SSY02031), Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Siyuan Chen
- Jiangxi Province Key Laboratory of Water Ecological Conservation in Headwater Regions (2023SSY02031), Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Shanyan Dong
- Jiangxi Province Key Laboratory of Water Ecological Conservation in Headwater Regions (2023SSY02031), Jiangxi University of Science and Technology, Ganzhou, 341000, China; Jiangxi Province Ganzhou key laboratory of Basin pollution simulation and control, Ganzhou, 341000, China.
| | - Yichun Zhu
- Jiangxi Province Key Laboratory of Water Ecological Conservation in Headwater Regions (2023SSY02031), Jiangxi University of Science and Technology, Ganzhou, 341000, China; Jiangxi Province Ganzhou key laboratory of Basin pollution simulation and control, Ganzhou, 341000, China
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5
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Xiong H, Liu L, Song B, Liu H, Shi H, Zhu Y. Mesophilic and thermophilic fermentation of activated sludge for volatile fatty acids production: focusing on anaerobic degradation of carbohydrate and protein. ENVIRONMENTAL TECHNOLOGY 2024; 45:5745-5757. [PMID: 38286139 DOI: 10.1080/09593330.2024.2306152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 12/31/2023] [Indexed: 01/31/2024]
Abstract
The volatile fatty acids (VFAs) productions, as well as particulate organics decomposition, soluble chemical oxygen demand (SCOD) yield, and the VFAs production pathways from mesophilic and thermophilic anaerobic fermentation in waste activated sludge were investigated. Batch experiments showed that the decomposition rate of volatile suspended solids (VSS), particulate carbohydrate (P-C) and particulate protein (P-P) followed the first-order kinetic model at different temperatures. However, the intermediates, accumulated in the process of protein or carbohydrate digestion had a more significant inhibitory effect on the production of VFAs during the mesophilic anaerobic acidification process. The production of VFAs by thermophilic anaerobic fermentation is 2086.05 mg COD/L, which is about twice the production under mesophilic conditions. Among them, the concentration and proportion of high molecular weight organic acids such as isobutyric acid (320.29 mgCOD/L) and isovaleric acid (745.75 mgCOD/L) are relatively high. Then 13C stable isotope labelling experiment demonstrated that, the decomposition of carbohydrates yields 77% acetic acid and 86% butyric acid, while protein breakdown produces 85% propionic acid and 99% valeric acid. This confirms that carbohydrates are more favourable for the formation of even-carbon organic acids, while proteins tend to yield odd-carbon organic acids. Additionally, this helps refine the pathway for valeric acid formation during anaerobic acidogenesis.
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Affiliation(s)
- Huilei Xiong
- Beijing Institute of Collaborative Innovation, Beijing, People's Republic of China
- School of Public Health, Xiangnan University, Chenzhou, People's Republic of China
| | - Lanhua Liu
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, People's Republic of China
| | - Baodong Song
- Beijing Institute of Collaborative Innovation, Beijing, People's Republic of China
| | - Haitao Liu
- School of Public Health, Xiangnan University, Chenzhou, People's Republic of China
| | - Hanchang Shi
- Beijing Institute of Collaborative Innovation, Beijing, People's Republic of China
- School of Environment, Tsinghua University, Beijing, People's Republic of China
| | - Yinhe Zhu
- Hunnan Chendian International Development Share-Holding Co. Ltd., Chenzhou, People's Republic of China
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6
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Zhang J, Zhang Y, Lv N, Li F, Li Y, Guo Z. Electrochemistry promotion of Fe(Ⅲ)/Fe(Ⅱ) cycle for continuous activation of PAA for sludge disintegration: Performance and mechanism. ENVIRONMENTAL RESEARCH 2024; 256:119268. [PMID: 38815721 DOI: 10.1016/j.envres.2024.119268] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 05/13/2024] [Accepted: 05/27/2024] [Indexed: 06/01/2024]
Abstract
In this study, electrochemistry was used to enhance the advanced oxidation of Fe(Ⅱ)/PAA (EC/Fe(Ⅱ)/PAA) to disintegrate waste activated sludge, and its performance and mechanism was compared with those of EC, PAA, EC/PAA and Fe(Ⅱ)/PAA. Results showed that the EC/Fe(Ⅱ)/PAA process effectively improved sludge disintegration and the concentrations of soluble chemical oxygen demand, polysaccharides and nucleic acids increased by 62.85%, 41.15% and 12.21%, respectively, compared to the Fe(Ⅱ)/PAA process. Mechanism analysis showed that the main active species produced in the EC/Fe(Ⅱ)/PAA process were •OH, R-O• and FeIVO2+. During the reaction process, sludge flocs were disrupted and particle size was reduced by the combined effects of active species oxidation, electrochemical oxidation and PAA oxidation. Furthermore, extracellular polymeric substances (EPS) was degraded, the conversion of TB-EPS to LB-EPS and S-EPS was promoted and the total protein and polysaccharide contents of EPS were increased. After sludge cells were disrupted, intracellular substances were released, causing an increase in nucleic acids, humic acids and fulvic acids in the supernatant, and resulting in sludge reduction. EC effectively accelerated the conversion of Fe(Ⅲ) to Fe(Ⅱ), which was conducive to the activation of PAA, while also enhancing the disintegration of EPS and sludge cells. This study provided an effective approach for the release of organic matter, offering significant benefits in sludge resource utilization.
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Affiliation(s)
- Jing Zhang
- School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin, 300401, China
| | - Yanping Zhang
- School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin, 300401, China.
| | - Ning Lv
- School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin, 300401, China
| | - Fen Li
- School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, Heilongjiang, China
| | - Yibing Li
- School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin, 300401, China
| | - Zhenjie Guo
- School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin, 300401, China
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7
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Zhong H, Wang Q, Wu M, Zhao P, Song W, Wang X. Anaerobic acidification membrane bioreactor operating at acidic condition for treating concentrated municipal wastewater: Performance and implication. BIORESOURCE TECHNOLOGY 2024; 399:130644. [PMID: 38552856 DOI: 10.1016/j.biortech.2024.130644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/18/2024] [Accepted: 03/27/2024] [Indexed: 04/01/2024]
Abstract
To address the low-carbon treatment requirements for municipal wastewater, a novel anaerobic acidification membrane bioreactor (AAMBR) was developed for recovering organic matter in terms of volatile fatty acids (VFAs). While the AAMBR successfully generated VFAs from municipal wastewater through forward osmosis (FO) membrane concentration, its operation was limited to a single pH value of 10.0. Here, performance of the AAMBR operating at acidic condition was evaluated and compared with that at alkaline condition. The findings revealed that the AAMBR with pH 5.0 efficiently transformed organic matter into acetic acid, propionic acid, and butyric acid, resulting in a VFAs yield of 0.48 g/g-CODfeed. In comparison with the AAMBR at pH 10.0, this study achieved a similar VFAs yield, a lower fouling tendency, a lower loss of nutrients and a lower controlling cost. In conclusion, this study demonstrated that a pH of 5.0 is optimal for the AAMBR treating municipal wastewater.
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Affiliation(s)
- Huihui Zhong
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, PR China
| | - Qiming Wang
- Scientific Research Academy of GuangXi Environmental Protection, Nanning 530022, PR China
| | - Mengfei Wu
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, PR China
| | - Pin Zhao
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, PR China
| | - Weilong Song
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, PR China
| | - Xinhua Wang
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, PR China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, PR China.
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8
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Chen S, Habib Z, Wang Z, Zhao P, Song W, Wang X. Integrating anaerobic acidification with two-stage forward osmosis concentration for simultaneously recovering organic matter, nitrogen and phosphorus from municipal wastewater. WATER RESEARCH 2023; 245:120595. [PMID: 37708772 DOI: 10.1016/j.watres.2023.120595] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 08/12/2023] [Accepted: 09/07/2023] [Indexed: 09/16/2023]
Abstract
In order to meet the demand of municipal wastewater for low-carbon treatment and resource recovery, a novel process of anaerobic acidification membrane bioreactor (AAMBR) assisted with a two-stage forward osmosis (FO) (FO-AAMBR-FO) was developed for simultaneously recovering organic matter and nutrients from municipal wastewater. The results indicated that the first FO process concentrated the municipal wastewater to one tenth of the initial volume. The corresponding chemical oxygen demand (COD), ammonia nitrogen (NH4+-N) and total phosphorus (TP) concentration reached up to 2800, 200 and 33 mg/L, respectively. Subsequently, the AAMBR was operated at pH value of 10 for treating the concentration of municipal wastewater, in which the organic matter was successfully converted to acetic acid and propionic acid with a total volatile fatty acids (VFAs) concentration of 1787 mg COD/L and a VFAs production efficiency of 62.36 % during 47 days of stable operation. After that, the NH4+-N and TP concentration in the effluent of the AAMBR were further concentrated to 175 and 36.7 mg/L, respectively, by the second FO process. The struvite was successfully recovered with NH4+-N and TP recovery rate of 94.53 % and 98.59 %, respectively. Correspondingly, the VFAs, NH4+-N and TP concentrations in the residual solution were 2905 mg COD/L, 11.8 and 7.92 mg/L, respectively, which could be used as the raw material for the synthesis of polyhydroxyalkanoate (PHA). Results reported here demonstrated that the FO-AAMBR-FO is a promising wastewater treatment technology for simultaneous recovery of organic matter (in form of VFAs) and nutrients (in form of struvite).
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Affiliation(s)
- Siyi Chen
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Zunaira Habib
- Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology, Islamabad 44000, Pakistan; Department of Chemistry, Rawalpindi Women University, 6th Road Satellite Town, Rawalpindi 46300, Pakistan
| | - Zhiwei Wang
- School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Pin Zhao
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Weilong Song
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Xinhua Wang
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China.
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9
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Chen Z, Zhu S, Gao S, Sun C, Tian Z, Wen X. A hyperthermophilic anaerobic fermentation platform for highly efficient short chain fatty acids production from thermal hydrolyzed sludge. WATER RESEARCH 2023; 243:120434. [PMID: 37573843 DOI: 10.1016/j.watres.2023.120434] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/27/2023] [Accepted: 07/28/2023] [Indexed: 08/15/2023]
Abstract
In this study, a carboxylate platform of hyperthermophilic (70 ℃) anaerobic fermentation (HAF) for short chain fatty acids (SCFAs) production from thermal hydrolyzed sludge (THS) was established. The long-term performance for SCFAs production and the microbial communities of this HAF under different SRTs were systematically investigated. Under the optimum SRT of 3 d, the HAF had the highest acetate production rate of 1.12 g COD/L/d which accounted for 60% in SCFAs. It also rendered a good performance in SCFAs production, with concentration, production rate and yield of 6.61 g COD/L, 1.86 g COD/L/d and 324 g COD/kg VSSin, respectively. Nearly no biogas produced from this system, which reduced the loss of carbon sources from the system. This was due to the inhibition of methanogenesis by the hyperthermophilic condition and the high content of total ammonia nitrogen (TAN) and free ammonia nitrogen (FAN). Tepidimicrobium, Bhargavaea and XBB1006 were the dominant genus-level biomarkers under the optimum SRT, which facilitated the decomposition of monosaccharides, amino acids, terpenoids and polyketides into SCFAs. This work provides an applicable anaerobic carboxylate platform for highly efficient SCFAs production from excess sludge.
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Affiliation(s)
- Zhan Chen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Shihui Zhu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Shan Gao
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Chenxiang Sun
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Zeshen Tian
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Xianghua Wen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
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10
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Prem EM, Schwarzenberger A, Markt R, Wagner AO. Effects of phenyl acids on different degradation phases during thermophilic anaerobic digestion. Front Microbiol 2023; 14:1087043. [PMID: 37089573 PMCID: PMC10113666 DOI: 10.3389/fmicb.2023.1087043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 03/06/2023] [Indexed: 04/08/2023] Open
Abstract
Aromatic compounds like phenyl acids (PA) can accumulate during anaerobic digestion (AD) of organic wastes due to an increased entry of lignocellulose, secondary plant metabolites or proteins, and thermodynamic challenges in degrading the benzene ring. The effects of aromatic compounds can be various - from being highly toxic to be stimulating for methanogenesis - depending on many parameters like inoculum or molecular characteristics of the aromatic compound. To contribute to a better understanding of the consequences of PA exposure during AD, the aim was to evaluate the effects of 10 mM PA on microbial communities degrading different, degradation phase-specific substrates in thermophilic batch reactors within 28 days: Microcrystalline cellulose (MCC, promoting hydrolytic to methanogenic microorganisms), butyrate or propionate (promoting syntrophic volatile fatty acid (VFA) oxidisers to methanogens), or acetate (promoting syntrophic acetate oxidisers to methanogens). Methane production, VFA concentrations and pH were evaluated, and microbial communities and extracellular polymeric substances (EPS) were assessed. The toxicity of PA depended on the type of substrate which in turn determined the (i) microbial diversity and composition and (ii) EPS quantity and quality. Compared with the respective controls, methane production in MCC reactors was less impaired by PA than in butyrate, propionate and acetate reactors which showed reductions in methane production of up to 93%. In contrast to the controls, acetate concentrations were high in all PA reactors at the end of incubation thus acetate was a bottle-neck intermediate in those reactors. Considerable differences in EPS quantity and quality could be found among substrates but not among PA variants of each substrate. Methanosarcina spp. was the dominant methanogen in VFA reactors without PA exposure and was inhibited when PA were present. VFA oxidisers and Methanothermobacter spp. were abundant in VFA assays with PA exposure as well as in all MCC reactors. As MCC assays showed higher methane yields, a higher microbial diversity and a higher EPS quantity and quality than VFA reactors when exposed to PA, we conclude that EPS in MCC reactors might have been beneficial for absorbing/neutralising phenyl acids and keeping (more susceptible) microorganisms shielded in granules or biofilms.
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Affiliation(s)
- Eva Maria Prem
- Department of Microbiology, Universität Innsbruck, Innsbruck, Austria
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11
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Zeng Y, Dong W, Wang H, Huang X, Li J. A novel strategy and mechanism for high-quality volatile fatty acids production from primary sludge: Peroxymonosulfate pretreatment combined with alkaline fermentation. ENVIRONMENTAL RESEARCH 2023; 217:114939. [PMID: 36435490 DOI: 10.1016/j.envres.2022.114939] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/18/2022] [Accepted: 11/22/2022] [Indexed: 06/16/2023]
Abstract
To obtain high-quality VFAs production from primary sludge, a novel strategy that combined peroxymonosulfate (PMS) pretreatment and alkaline fermentation (i.e., PMS & pH9) was proposed in the study. The results showed that PMS & pH9 was efficient in sludge solubilization and hydrolysis, resulting in a maximal VFAs yield of 401.2 mg COD/g VSS, which was 7.3-, 2.1-, and 8.8-fold higher than the sole PMS, sole pH9, and control, respectively. Acetate comprised 87.6% of VFAs in this integration system. Mechanism investigations revealed that sulfate and free radicals produced by PMS play roles in improving VFAs yield under alkaline conditions. Besides, sulfate also aided in C3∼C5 VFAs converting to acetate under alkaline conditions depending on the increase of incomplete-oxidative sulfate-reducing bacteria (iso-SRB) (i.e., Desulfobulbus and Desulfobotulus). Moreover, the relative abundances of acid-forming characteristic genera (i.e., Proteiniborus, Proteinilcasticum, and Acetoanaerobium) were higher in PMS & pH9.
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Affiliation(s)
- Yuanxin Zeng
- School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China
| | - Wenyi Dong
- School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China; Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control, Shenzhen, 518055, PR China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China; Laboratory of Urban High Concentration Wastewater Treatment and Resource Utilization, Shenzhen, 518055, PR China
| | - Hongjie Wang
- School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China; Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control, Shenzhen, 518055, PR China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China; Laboratory of Urban High Concentration Wastewater Treatment and Resource Utilization, Shenzhen, 518055, PR China
| | - Xiao Huang
- School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China; Laboratory of Urban High Concentration Wastewater Treatment and Resource Utilization, Shenzhen, 518055, PR China; Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, PR China.
| | - Ji Li
- School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, PR China; Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control, Shenzhen, 518055, PR China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China; Laboratory of Urban High Concentration Wastewater Treatment and Resource Utilization, Shenzhen, 518055, PR China
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12
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Current Status and Prospects of Valorizing Organic Waste via Arrested Anaerobic Digestion: Production and Separation of Volatile Fatty Acids. FERMENTATION-BASEL 2022. [DOI: 10.3390/fermentation9010013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Volatile fatty acids (VFA) are intermediary degradation products during anaerobic digestion (AD) that are subsequently converted to methanogenic substrates, such as hydrogen (H2), carbon dioxide (CO2), and acetic acid (CH3COOH). The final step of AD is the conversion of these methanogenic substrates into biogas, a mixture of methane (CH4) and CO2. In arrested AD (AAD), the methanogenic step is suppressed to inhibit VFA conversion to biogas, making VFA the main product of AAD, with CO2 and H2. VFA recovered from the AAD fermentation can be further converted to sustainable biofuels and bioproducts. Although this concept is known, commercialization of the AAD concept has been hindered by low VFA titers and productivity and lack of cost-effective separation methods for recovering VFA. This article reviews the different techniques used to rewire AD to AAD and the current state of the art of VFA production with AAD, emphasizing recent developments made for increasing the production and separation of VFA from complex organic materials. Finally, this paper discusses VFA production by AAD could play a pivotal role in producing sustainable jet fuels from agricultural biomass and wet organic waste materials.
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13
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Yuan H, Guan R, Cao C, Ji M, Gu J, Zhou L, Zuo X, Liu C, Li X, Yan B, Li J. Combined modifications of CaO and liquid fraction of digestate for augmenting volatile fatty acids production from rice straw: Microbial and proteomics insights. BIORESOURCE TECHNOLOGY 2022; 364:128089. [PMID: 36229012 DOI: 10.1016/j.biortech.2022.128089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/28/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
The modification sequence of chemical (CaO) and biological (liquid fraction of digestate, LFD) for augmenting volatile fatty acids (VFAs) production from rice straw was investigated in this study. The coupling order of the modifiers influenced acidification performance, and simultaneous modification (CaO-LFD) was superior to other modes. The highest VFAs production was obtained in CaO-LFD, 51% higher than that in the LFD-first additional modification. The CaO-LFD demonstrated the highest selectivity of acetate production, accounting for 79% of the total VFAs. In addition, CaO-LFD modification changed the direction of the domestication of fermentative bacteria and increased populations of the key anaerobes (Atopostipes sp.) responsible for acidification. The synergistic effect of CaO and LFD was revealed, namely, the effective function of CaO in degrading recalcitrant rice straw, the promotion of transport/metabolism of carbohydrates and acetogenesis by LFD.
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Affiliation(s)
- Hairong Yuan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China
| | - Ruolin Guan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China
| | - Chenxing Cao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China
| | - Mengyuan Ji
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, PR China; Department of Biology, University of Padua, Via U. Bassi 58/b, 35121 Padova, Italy
| | - Junyu Gu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China
| | - Li Zhou
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, PR China
| | - Xiaoyu Zuo
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China
| | - Chao Liu
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, PR China.
| | - Xiujin Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China
| | - Beibei Yan
- College of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China
| | - Jianwei Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China
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14
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Yue L, Chuan S, Yuanyuan W, Han D, Li K, Jinyuan M, Kaijun W. Effect of pH dynamic control on ethanol-lactic type fermentation (ELTF) performance of glucose. ENVIRONMENTAL TECHNOLOGY 2022; 43:4102-4114. [PMID: 34134601 DOI: 10.1080/09593330.2021.1942560] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 06/04/2021] [Indexed: 06/12/2023]
Abstract
This study proposed a new ethanol-lactic type fermentation (ELTF) and explored the optimal control strategy. Using batch experiments, the effects of pH, temperature and organic loading (OL) on ELTF were investigated. The sum of ethanol and lactic acid yield was highest at whole-control pH value of 4.0, 35°C temperature and OL of 33 gCOD/L. To improve ELTF, the dynamic pH control in the long-term CSTR was adjusted at 4.0 (1-28 days), 5.0 (29-44 days) and 4.0 (46-62 days) successively. The high concentration of ethanol and lactic acid was 8190.5 mg/L at 16th day of pH 4.0. At pH of 5.0, the average acidogenesis rate and total concentration of fermentation products increased 111.0% and 128.0%, respectively. Organisms of Lactobacillus and Bifidobacterium were the predominant bacteria in reactor. It can achieve the directional regulation of ELTF and provides parameter support for the application of two-phase anaerobic digestion.
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Affiliation(s)
- Liu Yue
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, People's Republic of China
| | - Shi Chuan
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, People's Republic of China
| | - Wu Yuanyuan
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, People's Republic of China
| | - Dan Han
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, People's Republic of China
| | - Kun Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, People's Republic of China
| | - Ma Jinyuan
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, People's Republic of China
| | - Wang Kaijun
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, People's Republic of China
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15
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Initial pH Conditions Shape the Microbial Community Structure of Sewage Sludge in Batch Fermentations for the Improvement of Volatile Fatty Acid Production. Microorganisms 2022; 10:microorganisms10102073. [PMID: 36296349 PMCID: PMC9611766 DOI: 10.3390/microorganisms10102073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 10/14/2022] [Accepted: 10/17/2022] [Indexed: 11/30/2022] Open
Abstract
Conversion of wastewater treatment plants into biorefineries is a sustainable alternative for obtaining valuable compounds, thus reducing pollutants and costs and protecting the environment and human health. Under specific operating conditions, microbial fermentative products of sewage sludge are volatile fatty acids (VFA) that can be precursors of polyhydroxyalkanoate thermoplastic polyesters. The role of various operating parameters in VFA production has yet to be elucidated. This study aimed to correlate the levels of VFA yields with prokaryotic microbiota structures of sewage sludge in two sets of batch fermentations with an initial pH of 8 and 10. The sewage sludge used to inoculate the batch fermentations was collected from a Sicilian WWTP located in Marineo (Italy) as a case study. Gas chromatography analysis revealed that initial pH 10 stimulated chemical oxygen demands (sCOD) and VFA yields (2020 mg COD/L) in comparison with initial pH 8. Characterization of the sewage sludge prokaryotic community structures—analyzed by next-generation sequencing of 16S rRNA gene amplicons—demonstrated that the improved yield of VFA paralleled the increased abundance of fermenting bacteria belonging to Proteobacteria, Bacteroidetes, Chloroflexi, and Firmicutes phyla and, conversely, the reduced abundance of VFA-degrading strains, such as archaeal methanogens.
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16
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Zou S, Ruan Y, Liu H, Wong J, Xu S. pH regulated potassium ferrate oxidation promotes acetic acid yield and phosphorous recovery rate from waste activated sludge. BIORESOURCE TECHNOLOGY 2022; 362:127816. [PMID: 36028050 DOI: 10.1016/j.biortech.2022.127816] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 08/13/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
To improve the dose efficiency of K2FeO4 in waste activated sludge (WAS) treatment, pH regulation on K2FeO4 pretreatment and acidogenic fermentation was investigated. Four pretreatments were compared, i.e. pH3 + 50 g/kg-TS, pH10 + 50 g/kg-TS, neutral pH + 50 g/kg-TS and neutral pH + 100 g/kg-TS (without pH adjustment). The higher short chain fatty acids (SCFAs) yield and phosphorous dissolution rate was found under the condition of pH 10.0. In pH10 + 50 g/kg-TS, the maximum concentration of SCFAs was 5591 mg-COD/L, which yield was 22.6 times higher than that of the neutral pH + 50 g/kg-TS (237 mg COD/L). The acidogenic fermentation period could be shortened to 5 days and acetic acid accounted for 70 % of SCFAs. Furthermore, PO43--P in the hydrolysate (346.5 mg/L) accounted for 47.59 % of TP, which is easier to be recovered by chemical precipitation. Therefore, a more economical and feasible utilization mode of potassium ferrate was proposed.
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Affiliation(s)
- Simin Zou
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Yannan Ruan
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Hongbo Liu
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Jonathan Wong
- Institute of Bioresource and Agriculture, Hong Kong Baptist University, Hong Kong Special Administrative Region, China
| | - Suyun Xu
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
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17
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Vanitha TK, Dahiya S, Lingam Y, Venkata Mohan S. Critical factors influence on acidogenesis towards volatile fatty acid, biohydrogen and methane production from the molasses-spent wash. BIORESOURCE TECHNOLOGY 2022; 360:127446. [PMID: 35690240 DOI: 10.1016/j.biortech.2022.127446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 06/05/2022] [Accepted: 06/07/2022] [Indexed: 06/15/2023]
Abstract
The study explored the spent wash valorisation into value added biobased products viz. volatile fatty acids (VFAs), biohydrogen (bio-H2), methane (CH4) and biohythane (bio-H-CNG) based on eight selected parameters employing design of experiment (DOE) approach. Selectively enriched biocatalyst showed marked influence on the production of acidogenic products (bio-H2 and VFA) while untreated inoculum resulted in higher CH4 and bio-H-CNG generation. CaCO3 showed potential for butyric acid (HBu) production while Na2CO3 specifically yielded higher acetic acid (HAc) when supplemented as buffering agents. Higher degree of acidification (DOA; 49.8%) was observed at lower organic load (OL; 30 g/L). Biogas production and profile was influenced by OL, enrichment of biocatalyst and supplemented buffering agent. Higher OL related to higher bioproduct production, while yields of the respective products were higher at lower OL.
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Affiliation(s)
- T K Vanitha
- Bioengineering and Environmental Science Lab, Department of Energy and Environmental Engineering, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Shikha Dahiya
- Bioengineering and Environmental Science Lab, Department of Energy and Environmental Engineering, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Yaswanth Lingam
- Bioengineering and Environmental Science Lab, Department of Energy and Environmental Engineering, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India
| | - S Venkata Mohan
- Bioengineering and Environmental Science Lab, Department of Energy and Environmental Engineering, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad 201002, India.
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18
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Lv J, Tu M, Chen X, Li S, Li Y, Jiang J. Effect of potassium persulphate addition on sludge disintegration of a mesophilic anaerobic fermentation system. ENVIRONMENTAL TECHNOLOGY 2022; 43:1709-1722. [PMID: 33170751 DOI: 10.1080/09593330.2020.1849407] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 10/27/2020] [Indexed: 06/11/2023]
Abstract
Persulphates, an advanced oxidation process, has been recently used as an alternative pretreatment method to enhance short-chain fatty acids (SCFAs) yield from waste-activated sludge (WAS) anaerobic fermentation (AF). But so far, the effects of peroxydisulphate (PDS) dosages on mesophilic anaerobic fermentation are still not studied fully. Herein, we explored the influences of potassium PDS addition on mesophilic AF of WAS. Notably, the addition of PDS could drastically accelerate WAS solubilization and hydrolysis, which was proportional to the amount of PDS. The maximal total SCFAs yield of 249.14 mg chemical oxygen demand/L was obtained with 120 mg PDS/g suspended solids addition at 6 days of AF, which was 2.2-fold that of the control one. Tightly bound extracellular polymeric substances (EPSs) were transformed into loosely bound EPS and dissolved organic matters, and aromatic proteins and humic-like substances of EPSs were disintegrated, which were caused by the devastating effects of PDS treatments on EPSs disruption. The intracellular constituents of microbial cells in the sludge were released accordingly. As a result, there was release of soluble substrates derived from the disintegration of both EPSs and cells, the amounts of which were proportional to the dose of PDS. Moreover, microbial diversity and richness were both decreased in the presence of PDS, and the relative abundance of phyla Actinobacteria increased with the increase of the PDS dosage. In addition, the stability of sludge flocs was destroyed in the presence of PDS, the distribution of particle size tended to be small and dispersive, and dewaterability of the sludge was deteriorated.
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Affiliation(s)
- Jinghua Lv
- School of Environment, Henan Normal University, Xinxiang, People's Republic of China
- Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Xinxiang, People's Republic of China
- Henan Key Laboratory for Environmental Pollution Control, Xinxiang, People's Republic of China
- International Joint Laboratory on Key Techniques in Water Treatment, Xinxiang, Henan Province, People's Republic of China
| | - Mengmiao Tu
- School of Environment, Henan Normal University, Xinxiang, People's Republic of China
| | - Xingyue Chen
- School of Environment, Henan Normal University, Xinxiang, People's Republic of China
| | - Suzhou Li
- School of Environment, Henan Normal University, Xinxiang, People's Republic of China
| | - Yunbei Li
- School of Environment, Henan Normal University, Xinxiang, People's Republic of China
- Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Xinxiang, People's Republic of China
- Henan Key Laboratory for Environmental Pollution Control, Xinxiang, People's Republic of China
- International Joint Laboratory on Key Techniques in Water Treatment, Xinxiang, Henan Province, People's Republic of China
| | - Jishao Jiang
- School of Environment, Henan Normal University, Xinxiang, People's Republic of China
- Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Xinxiang, People's Republic of China
- Henan Key Laboratory for Environmental Pollution Control, Xinxiang, People's Republic of China
- International Joint Laboratory on Key Techniques in Water Treatment, Xinxiang, Henan Province, People's Republic of China
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19
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Harirchi S, Wainaina S, Sar T, Nojoumi SA, Parchami M, Parchami M, Varjani S, Khanal SK, Wong J, Awasthi MK, Taherzadeh MJ. Microbiological insights into anaerobic digestion for biogas, hydrogen or volatile fatty acids (VFAs): a review. Bioengineered 2022; 13:6521-6557. [PMID: 35212604 PMCID: PMC8973982 DOI: 10.1080/21655979.2022.2035986] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/20/2021] [Accepted: 01/17/2022] [Indexed: 11/02/2022] Open
Abstract
In the past decades, considerable attention has been directed toward anaerobic digestion (AD), which is an effective biological process for converting diverse organic wastes into biogas, volatile fatty acids (VFAs), biohydrogen, etc. The microbial bioprocessing takes part during AD is of substantial significance, and one of the crucial approaches for the deep and adequate understanding and manipulating it toward different products is process microbiology. Due to highly complexity of AD microbiome, it is critically important to study the involved microorganisms in AD. In recent years, in addition to traditional methods, novel molecular techniques and meta-omics approaches have been developed which provide accurate details about microbial communities involved AD. Better understanding of process microbiomes could guide us in identifying and controlling various factors in both improving the AD process and diverting metabolic pathway toward production of selective bio-products. This review covers various platforms of AD process that results in different final products from microbiological point of view. The review also highlights distinctive interactions occurring among microbial communities. Furthermore, assessment of these communities existing in the anaerobic digesters is discussed to provide more insights into their structure, dynamics, and metabolic pathways. Moreover, the important factors affecting microbial communities in each platform of AD are highlighted. Finally, the review provides some recent applications of AD for the production of novel bio-products and deals with challenges and future perspectives of AD.
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Affiliation(s)
- Sharareh Harirchi
- Swedish Centre for Resource Recovery, University of Borås, 50190Borås, Sweden
| | - Steven Wainaina
- Swedish Centre for Resource Recovery, University of Borås, 50190Borås, Sweden
| | - Taner Sar
- Swedish Centre for Resource Recovery, University of Borås, 50190Borås, Sweden
| | - Seyed Ali Nojoumi
- Microbiology Research Center, Pasteur Institute of Iran, Tehran, Iran
- Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, Iran
| | - Milad Parchami
- Swedish Centre for Resource Recovery, University of Borås, 50190Borås, Sweden
| | - Mohsen Parchami
- Swedish Centre for Resource Recovery, University of Borås, 50190Borås, Sweden
| | - Sunita Varjani
- Paryavaran Bhavan, Gujarat Pollution Control Board, Gandhinagar, Gujarat, India
| | - Samir Kumar Khanal
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, Hawaii, USA
| | - Jonathan Wong
- Department of Biology, Institute of Bioresource and Agriculture and, Hong Kong Baptist University, Hong Kong
| | - Mukesh Kumar Awasthi
- College of Natural Resources and Environment, Northwest A&F University, Taicheng Road 3#, Yangling, Shaanxi, 712100, China
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20
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Pandey AK, Pilli S, Bhunia P, Tyagi RD, Surampalli RY, Zhang TC, Kim SH, Pandey A. Dark fermentation: Production and utilization of volatile fatty acid from different wastes- A review. CHEMOSPHERE 2022; 288:132444. [PMID: 34626658 DOI: 10.1016/j.chemosphere.2021.132444] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 09/26/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
Volatile fatty acids (VFAs) are the building blocks of the chemical industry, and they are the primary contributors to the planet's organic carbon cycle. VFA production from fossil fuels (mostly petroleum) is unsustainable, pollutes the environment, and generates greenhouse gases. As a result of these issues, there is a pressing need to develop alternate sources for the long-term generation of VFAs via anaerobic digestion. The accessible feedstocks for its sustainable production, as well as the influencing parameters, are discussed in this review. The use of VFAs as a raw material to make a variety of consumer products is reviewed in order to find a solution. It also bridges the gap between traditional and advanced VFA production and utilization methods from a variety of solid and liquid waste sources for economical stability.
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Affiliation(s)
- Ashutosh Kumar Pandey
- School of Civil and Environmental Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - S Pilli
- Department of Civil Engineering, National Institute of Technology, Warangal, 506004, Telangana, India.
| | - P Bhunia
- School of Infrastructure, Indian Institute of Technology Bhubaneswar, Bhubaneswar, 752050, India
| | - R D Tyagi
- INRS Eau, Terre, Environnement, 490, rue de la Couronne, Québec, G1K 9A9, Canada
| | - Rao Y Surampalli
- Global Institute for Energy, Environment and Sustainability, Kansas, USA
| | - Tian C Zhang
- Department of Civil & Environmental Engineering, University of Nebraska-Lincoln, Peter Kiewit Institute, Omaha, NE, 68182-0178, USA
| | - Sang-Hyoun Kim
- School of Civil and Environmental Engineering, Yonsei University, Seoul, 03722, Republic of Korea.
| | - Ashok Pandey
- Centre for Innovation and Translational Research, CSIR-Indian Institute of Toxicology Research, Lucknow, 226 001, India
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21
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Dutta D, Arya S, Kumar S. Industrial wastewater treatment: Current trends, bottlenecks, and best practices. CHEMOSPHERE 2021; 285:131245. [PMID: 34246094 DOI: 10.1016/j.chemosphere.2021.131245] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 05/12/2021] [Accepted: 06/14/2021] [Indexed: 06/13/2023]
Abstract
Rapid urbanization and industrialization have inextricably linked to water consumption and wastewater generation. Mining resources from industrial wastewater has proved to be an excellent source of secondary raw materials i.e., proficient for providing economic and financial benefits, clean and sustainable resilient environment, and achieving sustainable development goals (SDGs). Treatment of industrial wastewater for reusable resources has become a tedious task for decision-makers due to several bottlenecks and barriers, such as inefficient treatment options, high-cost expenditure, poor infrastructure, lack of financial support, and technical know-how. Most of the existing methods are conventional and fails to provide an economic benefit to the industries and have certain disadvantages. Also, the untreated industrial wastewater is discharged into the open drains, lakes, and rivers that lead to environmental pollution and severe health hazards. This paper has consolidated information about the current trends, opportunities, bottlenecks, and best practices associated with wastewater treatment and scope for the advancement in the existing technologies. Along with the efficient resource recovery, the wastewater could be ideally explored in the development of value-added materials, energy, and product recovery. The concepts, such as the circular economy (CE), partitions-release-recover (PRR), and transforming wastewater into bio factory are anticipated to be more convenient options to tackle the industrial wastewater menace.
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Affiliation(s)
- Deblina Dutta
- School of Environmental Science & Engineering, Indian Institute of Technology Kharagpur, 721 302, India
| | - Shashi Arya
- CSIR- National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur, 440 020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, Uttar Pradesh, India
| | - Sunil Kumar
- CSIR- National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur, 440 020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, Uttar Pradesh, India.
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22
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Janesch E, Pereira J, Neubauer P, Junne S. Phase Separation in Anaerobic Digestion: A Potential for Easier Process Combination? FRONTIERS IN CHEMICAL ENGINEERING 2021. [DOI: 10.3389/fceng.2021.711971] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The flexibilization of bioenergy production has the potential to counteract partly other fluctuating renewable energy sources (such as wind and solar power). As a weather-independent energy source, anaerobic digestion (AD) can offer on-demand energy supply through biogas production. Separation of the stages in anaerobic digestion represents a promising strategy for the flexibilization of the fermentative part of biogas production. Segregation in two reactor systems facilitates monitoring and control of the provision of educts to the second methanogenic stage, thus controlling biogas production. Two-stage operation has proven to reach similar or even higher methane yields and biogas purities than single-stage operation in many different fields of application. It furthermore allows methanation of green hydrogen and an easier combination of material and energy use of many biogenic raw and residual biomass sources. A lot of research has been conducted in recent years regarding the process phase separation in multi-stage AD operation, which includes more than two stages. Reliable monitoring tools, coupled with effluent recirculation, bioaugmentation and simulation have the potential to overcome the current drawbacks of a sophisticated and unstable operation. This review aims to summarize recent developments, new perspectives for coupling processes for energy and material use and a system integration of AD for power-to-gas applications. Thereby, cell physiological and engineering aspects as well as the basic economic feasibility are discussed. As conclusion, monitoring and control concepts as well as suitable separation technologies and finally the data basis for techno-economic and ecologic assessments have to be improved.
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23
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Hosseinzadeh A, Zhou JL, Navidpour AH, Altaee A. Progress in osmotic membrane bioreactors research: Contaminant removal, microbial community and bioenergy production in wastewater. BIORESOURCE TECHNOLOGY 2021; 330:124998. [PMID: 33757679 DOI: 10.1016/j.biortech.2021.124998] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 03/10/2021] [Accepted: 03/10/2021] [Indexed: 06/12/2023]
Abstract
Renewable energy, water conservation, and environmental protection are the most important challenges today. Osmotic membrane bioreactor (OMBR) is an innovative process showing superior performance in bioenergy production, eliminating contaminants, and low fouling tendency. However, salinity build-up is the main drawback of this process. Identifying the microbial community can improve the process in bioenergy production and contaminant treatment. This review aims to study the recent progress and challenges of OMBRs in contaminant removal, microbial communities and bioenergy production. OMBRs are widely reported to remove over 80% of total organic carbon, PO43-, NH4+ and emerging contaminants from wastewater. The most important microbial phyla for both hydrogen and methane production in OMBR are Firmicutes, Proteobacteria and Bacteroidetes. Firmicutes' dominance in anaerobic processes is considerably increased from usually 20% at the beginning to 80% under stable condition. Overall, OMBR process has great potential to be applied for simultaneous bioenergy production and wastewater treatment.
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Affiliation(s)
- Ahmad Hosseinzadeh
- Centre for Green Technology, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia
| | - John L Zhou
- Centre for Green Technology, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia.
| | - Amir H Navidpour
- Centre for Green Technology, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia
| | - Ali Altaee
- Centre for Green Technology, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia
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Vidal-Antich C, Perez-Esteban N, Astals S, Peces M, Mata-Alvarez J, Dosta J. Assessing the potential of waste activated sludge and food waste co-fermentation for carboxylic acids production. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 757:143763. [PMID: 33288258 DOI: 10.1016/j.scitotenv.2020.143763] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 11/03/2020] [Accepted: 11/05/2020] [Indexed: 06/12/2023]
Abstract
This study investigated waste activated sludge (WAS) and food waste (FW) co-fermentation in batch assays to produce carboxylic acids. Three mixtures (50%, 70% and 90% WAS in VS basis) were studied under different conditions: with and without extra alkalinity, and with and without WAS auto-hydrolysis pre-treatment. All tests were carried out at 35 °C, without pH adjustment and without external inoculum. Experimental results showed that co-fermentation yields, including volatile fatty acids and lactic acid, were always higher than WAS and FW mono-fermentation yields (ca. 100 and 80 mgCOD/gVS, respectively). Co-fermentation yields increased as the proportion of FW in the mixture increased, indicating that the improvement was primarily due to a higher FW degradation under co-fermentation conditions. The maximum co-fermentation yield was on average 480 mgCOD/gVS for the WAS/FW_50/50 mixture. The importance of pH on co-fermentation performance was evident in the experiments carried out with extra alkalinity, which showed that the proportion of WAS in the mixture should be high enough to keep the pH above 5.0. However, fermenters operational conditions should also prevent the enrichment of acetic acid consuming microorganisms. WAS auto-hydrolysis pre-treatment did not enhance co-fermentation yields but showed minor kinetic improvements. Regarding the product profile, butyric acid was enriched as the proportion of FW in the mixture increased and the concomitant pH decreased to the detriment of propionic acid. Propionic acid prevailed under neutral pH in the WAS mono-fermentation and the WAS/FW_90/10 mixture.
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Affiliation(s)
- C Vidal-Antich
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain; Water Research Institute, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
| | - N Perez-Esteban
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
| | - S Astals
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
| | - M Peces
- Department of Chemistry and Bioscience, Centre for Microbial Communities, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark
| | - J Mata-Alvarez
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain; Water Research Institute, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
| | - J Dosta
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain; Water Research Institute, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
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25
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Ping Q, Zhang Z, Dai X, Li Y. Novel CaO 2 beads used in the anaerobic fermentation of iron-rich sludge for simultaneous short-chain fatty acids and phosphorus recovery under ambient conditions. BIORESOURCE TECHNOLOGY 2021; 322:124553. [PMID: 33359566 DOI: 10.1016/j.biortech.2020.124553] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 12/11/2020] [Accepted: 12/13/2020] [Indexed: 06/12/2023]
Abstract
A novel composite CaO2 bead was prepared to improve total short-chain fatty acids (TSCFAs) production and phosphorus (P) recovery from iron-rich waste activated sludge (WAS) during ambient anaerobic fermentation. Results showed that CaO2 mass percentage of 5% and CaCl2:nylon66 = 1:1 (mass ratio) were the optimal prescription for the preparation of CaO2 beads with porous structure, loose morphology, and sustained-release of CaO2. The highest TSCFAs production (356 mg/g VSS) was observed and about 9% of P in sludge could be recovered on beads. The decrease of Fe-phosphate and Fe-oxides in the sludge were due to different mechanisms. Microbial community analyses showed that CaO2 beads effectively enriched dissimilatory iron-reducing bacteria (DIRB) and promoted iron-reduction related genes. After fermentation, the P-rich beads are easy to separate from sludge for further P recovery, and the supernatant carrying abundant acetate and Fe2+ can be returned to the wastewater treatment line to improve nutrient removal.
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Affiliation(s)
- Qian Ping
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| | - Zhipeng Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| | - Xiaohu Dai
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Yongmei Li
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
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Zhang L, Loh KC, Kuroki A, Dai Y, Tong YW. Microbial biodiesel production from industrial organic wastes by oleaginous microorganisms: Current status and prospects. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123543. [PMID: 32739727 DOI: 10.1016/j.jhazmat.2020.123543] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 07/16/2020] [Accepted: 07/20/2020] [Indexed: 06/11/2023]
Abstract
This review aims to encourage the technical development of microbial biodiesel production from industrial-organic-wastes-derived volatile fatty acids (VFAs). To this end, this article summarizes the current status of several key technical steps during microbial biodiesel production, including (1) acidogenic fermentation of bio-wastes for VFA collection, (2) lipid accumulation in oleaginous microorganisms, (3) microbial lipid extraction, (4) transesterification of microbial lipids into crude biodiesel, and (5) crude biodiesel purification. The emerging membrane-based bioprocesses such as electrodialysis, forward osmosis and membrane distillation, are promising approaches as they could help tackle technical challenges related to the separation and recovery of VFAs from the fermentation broth. The genetic engineering and metabolic engineering approaches could be applied to design microbial species with higher lipid productivity and rapid growth rate for enhanced fatty acids synthesis. The enhanced in situ transesterification technologies aided by microwave, ultrasound and supercritical solvents are also recommended for future research. Technical limitations and cost-effectiveness of microbial biodiesel production from bio-wastes are also discussed, in regard to its potential industrial development. Based on the overview on microbial biodiesel technologies, an integrated biodiesel production line incorporating all the critical technical steps is proposed for unified management and continuous optimization for highly efficient biodiesel production.
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Affiliation(s)
- Le Zhang
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower #15-02, 138602, Singapore
| | - Kai-Chee Loh
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower #15-02, 138602, Singapore; Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore
| | - Agnès Kuroki
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower #15-02, 138602, Singapore
| | - Yanjun Dai
- School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yen Wah Tong
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower #15-02, 138602, Singapore; Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore.
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27
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Ma H, Lin Y, Jin Y, Gao M, Li H, Wang Q, Ge S, Cai L, Huang Z, Van Le Q, Xia C. Effect of ultrasonic pretreatment on chain elongation of saccharified residue from food waste by anaerobic fermentation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 268:115936. [PMID: 33158614 DOI: 10.1016/j.envpol.2020.115936] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 10/03/2020] [Accepted: 10/24/2020] [Indexed: 06/11/2023]
Abstract
Converting biowaste into value-added products has raised the researchers' interests. In this study, bioconversion was applied to produce chain acids from food waste by anaerobic fermentation. To improve the caproic acid production, different pretreatments (i.e., ultrasonic, hydrothermal, and alkaline-thermal) were used for investigating their effects on the acidogenic production and microbial communities. The results showed that ultrasonic and hydrothermal pretreatments (207.8 and 210.1 mg COD/g VS, respectively) were very efficient for enhancing the caproic acid production, compared to the alkaline-thermal pretreated samples and control samples (72.6 and 97.5 mg COD/g VS, respectively). The ultrasonic pretreatment was beneficial for reducing volatile fatty acids (VFAs) during the caproic acid production, resulting in converting more lactic acid to caproic acid by adding the hydrothermal pretreatment. The microbial community analysis showed that the acidogenic bacteria Caproiciproducens dominated the fermentation in this bioconversion process of food waste into chain acids. The Caproiciproducens mainly degraded the proteins and carbohydrates from the saccharified residues of food waste to produce caproic acids through chain elongation procedure. The investigation and optimized method may help develop the bioconversion technology for producing VFAs products from food wastes.
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Affiliation(s)
- Hongzhi Ma
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, 100083, China
| | - Yujia Lin
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, 100083, China
| | - Yong Jin
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, 100083, China
| | - Ming Gao
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China
| | - Hongai Li
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China
| | - Qunhui Wang
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, 100083, China
| | - Shengbo Ge
- Co-Innovation Center of Efficient Processing and Utilization of Forestry Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China
| | - Liping Cai
- Co-Innovation Center of Efficient Processing and Utilization of Forestry Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China; Department of Mechanical Engineering, University of North Texas, Denton, TX, 76207, USA
| | - Zhenhua Huang
- Department of Mechanical Engineering, University of North Texas, Denton, TX, 76207, USA
| | - Quyet Van Le
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam
| | - Changlei Xia
- Co-Innovation Center of Efficient Processing and Utilization of Forestry Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China.
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28
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Intensification of Short Chain Fatty Acid Production during the Alkaline Pretreatment of Fine-Sieving Fractions. ENERGIES 2020. [DOI: 10.3390/en13184690] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Maximizing the internal carbon sources in raw wastewater was found to be an alternative option to alleviate the financial burden in external carbon sources (ECS) addition to the biological nutrient removal (BNR) process. Based on previous studies on particulate recovery via fine-sieving technologies, alkali pretreatment was used to improve the short-chain fatty acid (SCFA) production from the fine-sieving fractions (FSF). Hydrolysis performance and methane production were monitored to evaluate the reasons for the SCFA boost. Besides, the microbial community structure was evaluated by high-throughput sequencing. Furthermore, mass balance and financial benefits were preliminarily estimated. The results showed that alkali pretreatment effectively promoted the generation of SCFAs with 234 mg/g volatile suspended solids (VSS), almost double that of the control test. This was partially attributed to the efficient hydrolysis, with soluble polysaccharides and protein increased by 2.1 and 1.2 times compared to that of the control, respectively. Inhibition of methanogens was also devoted to the accumulation of SCFAs, with no methane production until 150 h at high pH value. Finally, a preliminary evaluation revealed that 44.51 kg/d SCFAs could be supplied as the electron donor for denitrification, significantly reducing the cost in ECS addition for most wastewater treatment plants (WWTPs) with carbon insufficiency.
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29
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Wang G, Wang D, Huang L, Song Y, Chen Z, Du M. Enhanced production of volatile fatty acids by adding a kind of sulfate reducing bacteria under alkaline pH. Colloids Surf B Biointerfaces 2020; 195:111249. [PMID: 32682275 DOI: 10.1016/j.colsurfb.2020.111249] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/30/2020] [Accepted: 07/06/2020] [Indexed: 11/16/2022]
Abstract
Anaerobic digestion could make sludge stable and harmless, and the volatile fatty acids (VFAs) produced from it. The objective of this study was to reduced sludge production and realize the resource utilization of VFAs through enhance anaerobic sludge fermentation by adding sulfate reducing bacteria (SRB) under alkaline pH. Under the neutral and alkaline pH, SRB was added into the sludge fermentation liquid with sole stock solution and sterilization treatment respectively, while the liquid without any additives was used as control. The results indicated that obvious increase of the production of VFAs was observed after adding SRB under alkaline pH. And, more protein and polysaccharide were obtained which were the main substrates for the production of VFAs. The concentration of ammonia nitrogen (NH4+-N) and phosphate (PO43--P) were also increased with the addition of SRB. So, a high yield production of VFAs could be achieved through the addition of SRB + alkaline pH.
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Affiliation(s)
- Guangzhi Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, China.
| | - Dongdong Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, China
| | - Likun Huang
- School of Food Engineering, Harbin University of Commerce, Harbin 150076, China
| | - Yanmei Song
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, China
| | - Zhiqiang Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, China
| | - Maoan Du
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, China
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Huang C, Wang W, Sun X, Shen J, Wang L. A novel acetogenic bacteria isolated from waste activated sludge and its potential application for enhancing anaerobic digestion performance. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 255:109842. [PMID: 31759203 DOI: 10.1016/j.jenvman.2019.109842] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 11/01/2019] [Accepted: 11/06/2019] [Indexed: 06/10/2023]
Abstract
The development of anaerobic digestion (AD) for volatile fatty acids (VFAs) production from waste activated sludge (WAS) is arrested due to low hydrolysis and acidification efficiency. This study proposed to enhance WAS reduction and VFAs accumulation during AD process via bioaugmentation of acetate-producing bacteria. Four acetogens were firstly isolated from a temperature-phased anaerobic digestion (TPAD) system. The acetate production efficiency of different isolates ranged from 15.8 to 73.7 mg acetate/g TOC, in which the bacterial strain NJUST19 was found to be the most effective strain. The results of morphological, biochemical characteristics as well as phylogenetic analysis showed that the isolate NJUST19 was Gram-positive and rod-shaped, catalase-negative, nitrate reduction-positive, methyl red-negative and capable of starch and gelatin hydrolysis, for which the name of Clostridium sp. NJUST19 was proposed. The optimal culture conditions (i.e. initial pH and temperature) were evaluated for their effects on microbe growth of selected NJUST19, and the maximum acetate production was observed at pH 9.0 and temperature of 40 °C. In the case of modified TPAD system inoculated with Clostridium sp. NJUST19, total suspended solids (TSS) removal rate and maximum VFAs accumulation increasing to 35.3% and 4200 mg/L, respectively, which was much higher than that of control (21.9% and 2894 mg/L). These results indicated that Clostridium sp. NJUST 19 is capable of enhancing digestion efficiency with a great benefit for VFAs production, offering potential prospects for bioaugmentation of WAS anaerobic digestion.
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Affiliation(s)
- Cheng Huang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, Jiangsu Province, China; Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu Province, China.
| | - Wei Wang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu Province, China
| | - Xiuyun Sun
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu Province, China.
| | - Jinyou Shen
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu Province, China
| | - Lianjun Wang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu Province, China
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31
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Zou H, Jiang Q, Zhu R, Chen Y, Sun T, Li M, Zhai J, Shi D, Ai H, Gu L, He Q. Enhanced hydrolysis of lignocellulose in corn cob by using food waste pretreatment to improve anaerobic digestion performance. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 254:109830. [PMID: 31733477 DOI: 10.1016/j.jenvman.2019.109830] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 10/20/2019] [Accepted: 11/05/2019] [Indexed: 06/10/2023]
Abstract
This study aims to enhance hydrolysis and anaerobic digestion of corn cob (CC) by using food waste (FW) pretreatment. FW, which tends to be acidification in fermentation, was applied in this process as an acid-like agent to accelerate lignocellulose hydrolysis, aiming to promote methane yield in further digestion process. The effect of FW pretreatment on pH, soluble chemical oxygen demand (SCOD), volatile fatty acids (VFAs), cellulose/hemicellulose contents and cellulose crystallinity are specially focused. FW:CC = 1:3 based on volatile solid (VS) was found to be the optimal mixing ratio in pretreatment and its hydrolysis efficiency was 28% higher than the control group. An increase of 13.2% in cellulose reduction and a decrease of 6.7% in cellulose crystallinity was achieved at this ratio. Supplementation of FW increased VFA concentrations in slurry mixture that directly change the activities of enzymes and microorganisms. In the stage of methane production, the digester A3 (FW:CC = 1:6 based on VS) with higher hydrolysis efficiency presented the best performance in methane production with a specific methane yield of 401.6 mL/g·VS, due to the recovery of the pH in this digester to the optimal pH range for methanogens' metabolism (pH 6.3-7.2). Kinetics studies of cellulose/hemicellulose degradation indicated that the pretreatment of FW could improve the degradation of cellulose. Three-dimensional excitation emission matrix (3DEEM) results further confirmed that FW play an important role in lignocellulose hydrolysis. In addition, variations of lignocellulosic textures during the pretreatment were also cleared by using field emission-scanning electron microscopy (FE-SEM) analysis.
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Affiliation(s)
- Huijing Zou
- Key Laboratory of the Three Gorges Reservoir Region's Eco-environments, Ministry of Education, Institute of Urban Construction and Environmental Engineering, Chongqing University, 174 Shapingba Road, Chongqing, 400045, PR China
| | - Qin Jiang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-environments, Ministry of Education, Institute of Urban Construction and Environmental Engineering, Chongqing University, 174 Shapingba Road, Chongqing, 400045, PR China
| | - Ruilin Zhu
- Key Laboratory of the Three Gorges Reservoir Region's Eco-environments, Ministry of Education, Institute of Urban Construction and Environmental Engineering, Chongqing University, 174 Shapingba Road, Chongqing, 400045, PR China
| | - Yongdong Chen
- Key Laboratory of the Three Gorges Reservoir Region's Eco-environments, Ministry of Education, Institute of Urban Construction and Environmental Engineering, Chongqing University, 174 Shapingba Road, Chongqing, 400045, PR China
| | - Tong Sun
- General Research Institute of Architecture & Planning Design Co. LTD., Chongqing University, 174 Shapingba Road, Chongqing, 400044, PR China
| | - Mingxing Li
- General Research Institute of Architecture & Planning Design Co. LTD., Chongqing University, 174 Shapingba Road, Chongqing, 400044, PR China
| | - Jun Zhai
- Key Laboratory of the Three Gorges Reservoir Region's Eco-environments, Ministry of Education, Institute of Urban Construction and Environmental Engineering, Chongqing University, 174 Shapingba Road, Chongqing, 400045, PR China
| | - Dezhi Shi
- Key Laboratory of the Three Gorges Reservoir Region's Eco-environments, Ministry of Education, Institute of Urban Construction and Environmental Engineering, Chongqing University, 174 Shapingba Road, Chongqing, 400045, PR China
| | - Hainan Ai
- Key Laboratory of the Three Gorges Reservoir Region's Eco-environments, Ministry of Education, Institute of Urban Construction and Environmental Engineering, Chongqing University, 174 Shapingba Road, Chongqing, 400045, PR China
| | - Li Gu
- Key Laboratory of the Three Gorges Reservoir Region's Eco-environments, Ministry of Education, Institute of Urban Construction and Environmental Engineering, Chongqing University, 174 Shapingba Road, Chongqing, 400045, PR China.
| | - Qiang He
- Key Laboratory of the Three Gorges Reservoir Region's Eco-environments, Ministry of Education, Institute of Urban Construction and Environmental Engineering, Chongqing University, 174 Shapingba Road, Chongqing, 400045, PR China
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32
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Fang W, Zhang X, Zhang P, Wan J, Guo H, Ghasimi DSM, Morera XC, Zhang T. Overview of key operation factors and strategies for improving fermentative volatile fatty acid production and product regulation from sewage sludge. J Environ Sci (China) 2020; 87:93-111. [PMID: 31791521 DOI: 10.1016/j.jes.2019.05.027] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 05/28/2019] [Accepted: 05/28/2019] [Indexed: 06/10/2023]
Abstract
In recent years, volatile fatty acid (VFA) production through anaerobic fermentation of sewage sludge, instead of methane production, has been regarded as a high-value and promising roadmap for sludge stabilization and resource recovery. This review first presents the effects of some essential factors that influence VFA production and composition. In the second part, we present an extensive analysis of conventional pretreatment and co-fermentation strategies ultimately addressed to improving VFA production and composition. Also, the effectiveness of these approaches is summarized in terms of sludge degradation, hydrolysis rate, and VFA production and composition. According to published studies, it is concluded that some pretreatments such as alkaline and thermal pretreatment are the most effective ways to enhance VFA production from sewage sludge. The possible reasons for the improvement of VFA production by different methods are also discussed. Finally, this review also highlights several current technical challenges and opportunities in VFA production with spectrum control, and further related research is proposed.
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Affiliation(s)
- Wei Fang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail:
| | - Xuedong Zhang
- Department of Water Management, Section Sanitary Engineering, Delft University of Technology, PO Box 5048, 2600 GA Delft, the Netherlands
| | - Panyue Zhang
- School of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
| | - Jijun Wan
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Hongxiao Guo
- Department of Water Management, Section Sanitary Engineering, Delft University of Technology, PO Box 5048, 2600 GA Delft, the Netherlands
| | - Dara S M Ghasimi
- Department of Civil Engineering, University of Kurdistan Hewlêr, Erbil, Kurdistan Region, Iraq
| | - Xavier Carol Morera
- Institut Quimíc de Sarrià, Universitat Ramon Llull, Via Augusta 390, E-08017 Barcelona, Spain
| | - Tao Zhang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail: .
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33
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Cheah YK, Vidal-Antich C, Dosta J, Mata-Álvarez J. Volatile fatty acid production from mesophilic acidogenic fermentation of organic fraction of municipal solid waste and food waste under acidic and alkaline pH. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:35509-35522. [PMID: 31111388 PMCID: PMC6923264 DOI: 10.1007/s11356-019-05394-6] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 05/06/2019] [Indexed: 05/17/2023]
Abstract
This study is focused on the effects of pH on the production of volatile fatty acids (VFAs) and their distribution through the acidogenic fermentation of source-sorted organic fraction of municipal solid waste (OFMSW) from a mechanical-biological treatment (MBT) plant, and food waste (FW) from a university canteen. In semi-continuous lab-scale digesters using OFMSW at a hydraulic retention time (HRT) of 3.5 days under acidic conditions (pH 6.0), the VFA concentration in the effluent increased to 9.8-11.5 g L-1 (VS content of the feedstock between 4.2 and 5.2% w/w), while its individual VFA profiling was similar to the influent which was already pre-fermented (namely, C2 35-41%, C3 18-22%, C4 17-21%, and C5 9-12%). When working with the same conditions but using FW as feedstock, an effluent with a VFA concentration up to 11.5 g VFA L-1 (FW with a VS content of 5.5% w/w) and a stable distribution of C2 and C4 acids (up to 60.3% and 12.9%, respectively) but with very low quantities of C3 and C5 acids (lower than 1.8 and 2.7%, respectively) was obtained. Anaerobic batch tests using FW revealed that alkaline pH near 9 could lead to higher VFA production with high acetic acid content when compared to pH 6. In the semi-continuous fermenters working at alkaline conditions (pH 9.5-10) using OFMSW and FW, an enhanced solubilization of organic matter was registered with respect to the fermenters working under acidic conditions. This fact was not reflected in a higher VFA production when using OFMSW as feedstock, probably due to free ammonia inhibition, since OFMSW was mixed in the MBT plant with supernatant from anaerobic digestion of this biowaste. However, when using FW, alkaline conditions lead to an enhanced VFA production with respect to the reactor working under acidic conditions, being acetic acid the predominant product, which represented up to 91% of the VFA spectrum obtained.
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Affiliation(s)
- Yen-Keong Cheah
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, 08028, Barcelona, Catalonia, Spain
| | - Carme Vidal-Antich
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, 08028, Barcelona, Catalonia, Spain
| | - Joan Dosta
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, 08028, Barcelona, Catalonia, Spain.
| | - Joan Mata-Álvarez
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, 08028, Barcelona, Catalonia, Spain
- Water Research Institute, University of Barcelona, 08001, Barcelona, Catalonia, Spain
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Liu G, Li X, Ma X, Ma L, Chen H. Hydrolysis and decomposition of waste activated sludge with combined lysozyme and rhamnolipid treatment: Effect of pH. BIORESOURCE TECHNOLOGY 2019; 293:122074. [PMID: 31491652 DOI: 10.1016/j.biortech.2019.122074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 08/22/2019] [Accepted: 08/24/2019] [Indexed: 06/10/2023]
Abstract
Effect of pH on waste activated sludge (WAS) hydrolysis and decomposition treating with lysozyme and rhamnolipid combined (Ly + RL) was investigated in this study. Results showed that Ly + RL system could significantly improve the release of soluble organic matters at the optimal RL dosage of 0.3 g/gSS and lysozyme dosage of 0.15 g/gSS. Alkali conditions showed better effect than that of acid on the release of soluble organics, improvement of WAS biodegradability and reduction of big floc size within Ly + RL treatment system and the optimal pH was 10. And 9591.6 mg/L soluble chemical oxygen demand (SCOD), 1612.0 mg/L protein and 1211.6 mg/L polysaccharide were released at pH10 after 12 h co-digestion. 83.7% bacteria and 92.2% archaea were decomposed at pH10. Class Gammaproteobacteria (82.4%) was the predominant bacteria after treated by Ly + RL system, and the treated WAS was beneficial for the subsequent organics bio-degradation and volatile fatty acids accumulation.
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Affiliation(s)
- Gaige Liu
- School of Civil and Transportation, Hebei University of Technology, Tianjin 300401, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xiangkun Li
- School of Civil and Transportation, Hebei University of Technology, Tianjin 300401, China.
| | - Xiaochen Ma
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Linli Ma
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Hongying Chen
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
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35
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He ZW, Tang CC, Liu WZ, Ren YX, Guo ZC, Zhou AJ, Wang L, Yang CX, Wang AJ. Enhanced short-chain fatty acids production from waste activated sludge with alkaline followed by potassium ferrate treatment. BIORESOURCE TECHNOLOGY 2019; 289:121642. [PMID: 31226670 DOI: 10.1016/j.biortech.2019.121642] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 06/09/2019] [Accepted: 06/10/2019] [Indexed: 06/09/2023]
Abstract
This study reported an efficient approach, i.e., alkaline followed by potassium ferrate (PF) pretreatment, to enhance short chain fatty acids (SCFAs) production from waste activated sludge anaerobic fermentation process. The optimum condition was initial pH of 10.0 and PF dosage of 28 mg Fe(VI)/g total suspended solid, with the highest SCFAs production of 382 mg chemical oxygen demand/g volatile suspended solid, which was 2.03 and 2.06 times higher than that of corresponding sole treatments. It was found that the alkaline + PF treatment could provide more soluble substrates for subsequent acidification process by accelerating disruption of both microbial cells and extracellular polymeric substances. And the alkaline + PF treatment also benefited to the activity promotion of specific hydrolases and inhibition of methanogens. Besides, the abundances of microorganisms related to SCFAs production, such as Proteiniclasticum and Macellibacteroides, were increased greatly, whereas the main SCFAs consumer, Proteobacteria, was decreased from 29.1% to 14.4%.
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Affiliation(s)
- Zhang-Wei He
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Cong-Cong Tang
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Wen-Zong Liu
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing 100085, China.
| | - Yong-Xiang Ren
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Ze-Chong Guo
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212005, China
| | - Ai-Juan Zhou
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Ling Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Chun-Xue Yang
- School of Geography and Tourism, Harbin University, Harbin 150086, China
| | - Ai-Jie Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing 100085, China
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Lu D, Xing B, Liu Y, Wang Z, Xu X, Zhu L. Enhanced production of short-chain fatty acids from waste activated sludge by addition of magnetite under suitable alkaline condition. BIORESOURCE TECHNOLOGY 2019; 289:121713. [PMID: 31276993 DOI: 10.1016/j.biortech.2019.121713] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 06/24/2019] [Accepted: 06/26/2019] [Indexed: 06/09/2023]
Abstract
Alkaline fermentation technology is an effective method for resource recovery, e.g., short-chain fatty acids (SCFAs), but the acidification process needs to be further enhanced. To improve the release and acidification of organic matters in waste activated sludge (WAS) fermentation simultaneously, a novel method was proposed with magnetite addition under alkaline condition in this study. Compared with the control, SCFAs and acetic acids yields increased by 21.2% ± 3.1% and 31.0% ± 1.2% in the 0.6 g/gVSS magnetite-based system, respectively. Besides, the activities of α-glucosidase, protease and acetate kinase (AK) were enhanced with magnetite addition, and the abundance of acidogenic microbes was improved obviously. Furthermore, magnetite reduced the release of PO43--P significantly via the precipitation reaction. Of all, a novel side-stream WAS hydrolysis and acidification process based on magnetite addition under suitable alkaline condition is proposed, realizing the efficient recovery of carbon and phosphorus resources along with wastewater and WAS treatment.
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Affiliation(s)
- Donghui Lu
- Institute of Environment Pollution Control and Treatment, Zhejiang University, Hangzhou 310058, China
| | - Bo Xing
- Shaoxing Environmental Monitoring Center, Shaoxing 312000, China
| | - Yuhan Liu
- Zhejiang University, Hangzhou 310058, China
| | - Zhirong Wang
- Zhejiang Provincal Office of Agricultural Ecology and Energy, Hangzhou 310012, China
| | - Xiangyang Xu
- Institute of Environment Pollution Control and Treatment, Zhejiang University, Hangzhou 310058, China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety, Hangzhou 310058, China; Zhejiang Provincial Engineering Laboratory of Water Pollution Control, 388 Yuhangtang Road, Hangzhou 310058, China
| | - Liang Zhu
- Institute of Environment Pollution Control and Treatment, Zhejiang University, Hangzhou 310058, China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety, Hangzhou 310058, China; Zhejiang Provincial Engineering Laboratory of Water Pollution Control, 388 Yuhangtang Road, Hangzhou 310058, China.
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Yu J, Zhao L, Feng J, Yao Z, Huang K, Luo J, Wei S, Chen J. Sequencing batch dry anaerobic digestion of mixed feedstock regulating strategies for methane production: Multi-factor interactions among biotic and abiotic characteristics. BIORESOURCE TECHNOLOGY 2019; 284:276-285. [PMID: 30952055 DOI: 10.1016/j.biortech.2019.03.141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 03/27/2019] [Accepted: 03/29/2019] [Indexed: 06/09/2023]
Abstract
This study investigated the synergistic effects and regulation strategy of multiple factors for improving methane production in sequencing batch dry anaerobic digestion (SBD-AD) using corn stalks (CS) and cow dung (CD). The regulation of the spray frequency (SF) and inoculum content (IC) significantly improved methane yield, which increased feedstock ratios (FRs) by 12.4-121.3%. Moreover, the relationship between SF and IC produced distinct interaction modes. An FR of 4:6 increased the SF to 2 h for the CD-rich condition, and an FR of 6:4 decreased the SF during a 6 h interval and increased the IC for the CS-rich condition, resulting in increases in methane yield and the conversion efficiency of volatile fatty acids (VFAs). Methanogenesis (Methanogens) played a key role in SBD-AD. The nutrient substrate (NH4-N+) and key enzyme activities of methanogens were significantly affected such that the synergistic effect of the acetoclastic and hydrogenotrophic methanogenesis pathways was likely strengthened.
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Affiliation(s)
- Jiadong Yu
- Key Laboratory of Energy Resource Utilization from Agricultural Residues, Chinese Academy of Agricultural Engineering, Beijing 100125, China.
| | - Lixin Zhao
- Key Laboratory of Energy Resource Utilization from Agricultural Residues, Chinese Academy of Agricultural Engineering, Beijing 100125, China
| | - Jing Feng
- Key Laboratory of Energy Resource Utilization from Agricultural Residues, Chinese Academy of Agricultural Engineering, Beijing 100125, China
| | - Zonglu Yao
- Key Laboratory of Energy Resource Utilization from Agricultural Residues, Chinese Academy of Agricultural Engineering, Beijing 100125, China
| | - Kaiming Huang
- Key Laboratory of Energy Resource Utilization from Agricultural Residues, Chinese Academy of Agricultural Engineering, Beijing 100125, China
| | - Juan Luo
- Key Laboratory of Energy Resource Utilization from Agricultural Residues, Chinese Academy of Agricultural Engineering, Beijing 100125, China
| | - Shimeng Wei
- Key Laboratory of Energy Resource Utilization from Agricultural Residues, Chinese Academy of Agricultural Engineering, Beijing 100125, China
| | - Jiankun Chen
- Key Laboratory of Energy Resource Utilization from Agricultural Residues, Chinese Academy of Agricultural Engineering, Beijing 100125, China
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Garcia-Aguirre J, Esteban-Gutiérrez M, Irizar I, González-Mtnez de Goñi J, Aymerich E. Continuous acidogenic fermentation: Narrowing the gap between laboratory testing and industrial application. BIORESOURCE TECHNOLOGY 2019; 282:407-416. [PMID: 30884461 DOI: 10.1016/j.biortech.2019.03.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 03/05/2019] [Accepted: 03/07/2019] [Indexed: 05/28/2023]
Abstract
This study explored the potential of acidogenic fermentation of sewage sludge (SS) in an 80 L automatized pilot scale platform. A high-rate VFA production was obtained at HRT 5 d and pH 9, with a volatile fatty acid (VFA) yield of 336 mg VFA g-1 VS and a VFA productivity of 2.15 kg VFA m-3 d-1. During co-fermentation of SS with OFMSW, a reversible pH shift from pH 9 to pH 6, evidenced a higher acidogenic activity which promoted the butyrate metabolic pathway, with 13.97 g COD L-1 of butyric acid and a VFA peak 23.2 g COD L-1. The results show the degree of flexibility of mixed culture fermentation systems, where other pH control methods other than steady control could be used to enhance the fermentation process. Ultrafiltration was a feasible technology to obtain a VFA rich permeate where 12.3-26.6 g COD L-1 could be recovered.
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Affiliation(s)
- Jon Garcia-Aguirre
- Ceit, Manuel Lardizabal 15, 20018 Donostia/San Sebastian, Spain; University of Navarra, Tecnun, Manuel Lardizabal 13, 20018 Donostia/San Sebastián, Spain.
| | - Myriam Esteban-Gutiérrez
- Ceit, Manuel Lardizabal 15, 20018 Donostia/San Sebastian, Spain; University of Navarra, Tecnun, Manuel Lardizabal 13, 20018 Donostia/San Sebastián, Spain.
| | - Ion Irizar
- Ceit, Manuel Lardizabal 15, 20018 Donostia/San Sebastian, Spain; University of Navarra, Tecnun, Manuel Lardizabal 13, 20018 Donostia/San Sebastián, Spain.
| | - Jaime González-Mtnez de Goñi
- Ceit, Manuel Lardizabal 15, 20018 Donostia/San Sebastian, Spain; University of Navarra, Tecnun, Manuel Lardizabal 13, 20018 Donostia/San Sebastián, Spain.
| | - Enrique Aymerich
- Ceit, Manuel Lardizabal 15, 20018 Donostia/San Sebastian, Spain; University of Navarra, Tecnun, Manuel Lardizabal 13, 20018 Donostia/San Sebastián, Spain.
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Luo K, Pang Y, Yang Q, Wang D, Li X, Lei M, Huang Q. A critical review of volatile fatty acids produced from waste activated sludge: enhanced strategies and its applications. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:13984-13998. [PMID: 30900121 DOI: 10.1007/s11356-019-04798-8] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 03/05/2019] [Indexed: 06/09/2023]
Abstract
This paper reviews the recent achievements in the enhanced production of volatile fatty acids (VFAs) from waste activated sludge (WAS). The enhanced strategies are divided into two approaches. The first strategy focuses on the regulation of carbon-to-nitrogen (C/N) ratio by co-digestion of WAS with carbon-rich substrates, including municipal solid wastes (MSW), marine algae, agricultural residues, and animal manures. The other strategy is to enhance the solubilization and hydrolysis of WAS or inhibit the methanogenesis by applying various pretreatments, such as mechanical, chemical, enzymatic, and thermal pretreatment. Finally, the applications of WAS-derived VFAs are discussed. The future researches in enhancing VFAs production and wide application of the VFAs from both technical and economic perspectives are proposed.
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Affiliation(s)
- Kun Luo
- College of Bioengineering and Environmental Science, Changsha University, Changsha, 410003, People's Republic of China
| | - Ya Pang
- College of Bioengineering and Environmental Science, Changsha University, Changsha, 410003, People's Republic of China.
| | - Qi Yang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.
| | - Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
| | - Xue Li
- College of Bioengineering and Environmental Science, Changsha University, Changsha, 410003, People's Republic of China
| | - Min Lei
- College of Bioengineering and Environmental Science, Changsha University, Changsha, 410003, People's Republic of China
| | - Qi Huang
- College of Bioengineering and Environmental Science, Changsha University, Changsha, 410003, People's Republic of China
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Liu G, Wang K, Li X, Ma L, Ma X, Chen H. Enhancement of excess sludge hydrolysis and decomposition with different lysozyme dosage. JOURNAL OF HAZARDOUS MATERIALS 2019; 366:395-401. [PMID: 30551085 DOI: 10.1016/j.jhazmat.2018.12.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 11/26/2018] [Accepted: 12/01/2018] [Indexed: 06/09/2023]
Abstract
The performance of the lysozyme catalysis on excess sludge (ES) hydrolysis and decomposition was investigated in this study. For this purpose, the release of soluble organic matters from sludge flocs, extracellular polymeric substances (EPS) changes in composition and distribution and the quantity variations of microorganisms were monitored. Results indicated that lysozyme boosted the ES hydrolysis significantly with approximately 236.5 mg/L soluble chemical oxygen demand (SCOD), 58.6 mg/L polysaccharide and 662.7 mg/L protein release within 240 min at the lysozyme dosage of 150 mg/gSS. Arising lysozyme dosages (from 0 to 150 mg/gSS step by step) could dramatically enhance the efficiency of the enzyme on ES with the concentration of polysaccharide increased from 84.6 mg/L to 143.2 mg/L and protein increased from 325.0 mg/L to 987.7 mg/L in total EPS. The decomposition effect of lysozyme on microorganisms improved with dosage, about 15.4%, 17.5% and 20.2% bacteria and 56.3%, 57.2% and 65.0% archaea were disintegrated at the lysozyme dosages of 50, 100 and 150 mg/gSS, respectively. However, fungi were barely influenced by the enzymatic catalysis. Tryptophan-protein like substances and aromatic protein were the dominant ES lysis compositions in EPS.
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Affiliation(s)
- Gaige Liu
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Ke Wang
- School of Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Xiangkun Li
- School of Environment, Harbin Institute of Technology, Harbin 150090, China; School of Civil and Transportation, Hebei University of Technology, Tianjin 300401, China.
| | - Linli Ma
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xiaochen Ma
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Hongying Chen
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
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Zou Q, Xiang H, Jiang J, Li D, Aihemaiti A, Yan F, Liu N. Vanadium and chromium-contaminated soil remediation using VFAs derived from food waste as soil washing agents: A case study. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 232:895-901. [PMID: 30530280 DOI: 10.1016/j.jenvman.2018.11.129] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 10/18/2018] [Accepted: 11/26/2018] [Indexed: 06/09/2023]
Abstract
Food waste (FW) is environmentally unfriendly and decays easily under ambient conditions. Vanadium (V) and chromium (Cr) contamination in soils has become an increasing concern due to risks to human health and environmental conservation. Volatile fatty acids (VFAs) derived from FW was applied as soil washing agent to treat V and Cr-contaminated soil collected from a former V smelter site in this work. The Community Bureau of Reference (BCR) three-step sequential extraction procedure was used to identify geochemical fractions of V and Cr influencing their mobility and biological toxicity. Optimal parameters of a single washing procedure were determined to be a 4 h contact time, liquid-solid ratio of 10:1, VFAs concentration of 30 g/L, and reaction temperature of 25 °C, considering for typical soil remediation projects and complete anaerobic fermentation of FW. Under the optimal conditions, butyric acid fermentation VFAs attained removal rates of 57.09 and 23.55% for extractable fractions of V and Cr, respectively. Simultaneously, a multi-washing process under a constant liquid-solid ratio using fresh and recycled VFAs was conducted, which led to an improvement on the total removal efficiency of toxic metals. The washing procedure could reach the pollution thresholds for several plants, such as of S. viridis, K. scoparia, M. sativa, and E. indica. This strategy enhances the utilization of VFAs derived from food waste, has a positive effect on V and Cr-contaminated soil remediation, wastewater control of soil washing and FW disposal.
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Affiliation(s)
- Quan Zou
- School of Environment, Tsinghua University, Beijing 10084, China.
| | - Honglin Xiang
- School of Environment, Tsinghua University, Beijing 10084, China
| | - Jianguo Jiang
- School of Environment, Tsinghua University, Beijing 10084, China; Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education, Beijing 10084, China.
| | - Dean Li
- School of Environment, Tsinghua University, Beijing 10084, China
| | | | - Feng Yan
- School of Environment, Tsinghua University, Beijing 10084, China
| | - Nuo Liu
- School of Environment, Tsinghua University, Beijing 10084, China
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Shao M, Guo L, She Z, Gao M, Zhao Y, Sun M, Guo Y. Enhancing denitrification efficiency for nitrogen removal using waste sludge alkaline fermentation liquid as external carbon source. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:4633-4644. [PMID: 30565112 DOI: 10.1007/s11356-018-3944-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 12/07/2018] [Indexed: 06/09/2023]
Abstract
External carbon source was usually added to enhance denitrification efficiency for nitrogen removal in wastewater treatment. In this study, waster sludge alkaline fermentation liquid was successfully employed as an alternative carbon source for biological denitrification. The denitrification performance was studied at different C/Ns (carbon-to-nitrogen ratios) and HRTs (hydraulic retention times). A C/N of 7 and an HRT of 8 h were the optimal conditions for denitrification. The nitrate removal efficiency of 96.4% and no obvious nitrite accumulation in the effluent were achieved under the optimal conditions with a low soluble chemical oxygen demand (SCOD) level. The sludge carbon source utilization was analyzed and showed that the volatile fatty acids (VFAs) were prior utilized than proteins and carbohydrates. The excitation-emission matrix (EEM) spectroscopy with fluorescence regional integration (FRI) was adopted to analyze the compositional and variations of dissolved organic matters (DOM). Moreover, a high denitrification rate (VDN) and potential (PDN) with low heterotroph anoxic yield (YH) was exhibited at the optimal C/N and HRT condition, indicating the better denitrification ability and organic matter utilization efficiencies.
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Affiliation(s)
- Mengyu Shao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Liang Guo
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China.
- Key Laboratory of Marine Environmental and Ecology, Ministry of Educatin, Ocean University of China, Qingdao, 266100, China.
- Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Qingdao, 266100, China.
| | - Zonglian She
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Mengchun Gao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Yangguo Zhao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Mei Sun
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Yiding Guo
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
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Fang Q, Ji S, Huang D, Huang Z, Huang Z, Zeng Y, Liu Y. Impact of Alkaline Pretreatment to Enhance Volatile Fatty Acids (VFAs) Production from Rice Husk. Biochem Res Int 2019; 2019:8489747. [PMID: 30809396 PMCID: PMC6364127 DOI: 10.1155/2019/8489747] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Accepted: 12/20/2018] [Indexed: 12/03/2022] Open
Abstract
This study explores the use of alkaline pretreatments to improve the hydrolyzation of rice husks to produce volatile fatty acids (VFAs). The study investigated the effects of reagent concentration and pretreatment time on protein, carbohydrates, and dissolved chemical oxygen demand (SCOD) dissolution after the pretreatment. The optimum alkaline pretreatment conditions were 0.30 g NaOH (g VS)-1, with a reaction time of 48 h. The experimental results show that when comparing the total VFA (TVFA) yields from the alkaline-pretreated risk husk with those from the untreated rice husk, over 14 d and 2 d, the maximum value reached 1237.7 and 716.0 mg·L-1 with acetic acid and propionic acid and with acetic acid and butyric acid, respectively. After the alkaline pretreatment, TVFAs increased by 72.9%; VFA accumulation grew over time. The study found that alkaline pretreatment can improve VFA yields from rice husks and transform butyric acid fermentation into propionic acid fermentation. The study results can provide guidelines to support the comprehensive utilization of rice husk and waste treatment.
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Affiliation(s)
- Qian Fang
- Department of Municipal Engineering, College of Civil Engineering, Guangzhou University, Guangzhou 510006, China
| | - Sinmin Ji
- Department of Municipal Engineering, College of Civil Engineering, Guangzhou University, Guangzhou 510006, China
| | - Dingwu Huang
- Department of Municipal Engineering, College of Civil Engineering, Guangzhou University, Guangzhou 510006, China
| | - Zhouyue Huang
- Department of Municipal Engineering, College of Civil Engineering, Guangzhou University, Guangzhou 510006, China
| | - Zilong Huang
- Department of Municipal Engineering, College of Civil Engineering, Guangzhou University, Guangzhou 510006, China
| | - Yunyi Zeng
- Department of Municipal Engineering, College of Civil Engineering, Guangzhou University, Guangzhou 510006, China
| | - Yu Liu
- Department of Municipal Engineering, College of Civil Engineering, Guangzhou University, Guangzhou 510006, China
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Zhao J, Li Y, Pan S, Tu Q, Dang W, Wang Z, Zhu H. Effects of magnesium chloride on the anaerobic digestion and the implication on forward osmosis membrane bioreactor for sludge anaerobic digestion. BIORESOURCE TECHNOLOGY 2018; 268:700-707. [PMID: 30144745 DOI: 10.1016/j.biortech.2018.08.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 07/31/2018] [Accepted: 08/02/2018] [Indexed: 06/08/2023]
Abstract
This work elucidates the effects of model reversed salt MgCl2 on methane production in an anaerobic digestion bioreactor treating waste sludge. Along with MgCl2 concentration being raised stepwise, the methane production was only slightly less than in the control when MgCl2 was 20 g/L and under, and then suddenly reduced to only about 10 mL/(L·d) at a MgCl2 concentration of 30 g/L, and finally stopped when the MgCl2 concentration reached 50 g/L. However, the total relative abundance of methanogens Methanomicrobia and Methanobacteria still accounted for 84.97% of the archaeal community when MgCl2 was 50 g/L. The high correlation between live/dead cell ratio and methane production suggests that the live/dead cell ratio instead of the inhibition of methanogen might be the major cause for the halt of methane production at a magnesium chloride concentration of 50 g/L.
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Affiliation(s)
- Jing Zhao
- Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China; College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Yunqian Li
- Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China; College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Shuang Pan
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Qianqian Tu
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Wenyue Dang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Zhuo Wang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Hongtao Zhu
- Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China; College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
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45
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Li X, Liu G, Liu S, Ma K, Meng L. The relationship between volatile fatty acids accumulation and microbial community succession triggered by excess sludge alkaline fermentation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 223:85-91. [PMID: 29906676 DOI: 10.1016/j.jenvman.2018.06.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 05/08/2018] [Accepted: 06/01/2018] [Indexed: 05/28/2023]
Abstract
The volatile fatty acids (VFAs) accumulation pattern and microbial community succession were studied during excess sludge (ES) alkaline fermentation at pH of 10.0 with expanded granular sludge blanket reactor over 5 cyclers. Microbial community shifted conspicuously as ES suffered alkaline fermentation. Both VFAs and acid-producing bacteria increased rapidly during the first 8 days fermentation time, and they showed a quite positive correlation relationship. In addition, soluble chemical oxygen demand (SCOD) also dramatically increased during the first 8 days, which implied 8 day was the optimum sludge retention time (SRT) for ES alkaline fermentation and VFAs accumulation time. Illumina Miseq Sequencing analysis indicated that Clostridium, Bacillus, Amphibacillus and Peptostreptococcaceae were the dominant bacteria genus to produce VFAs. Acetic acid took about 84% in total VFAs because among the total acid-producing bacteria most bacteria could produce acetic acid.
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Affiliation(s)
- Xiangkun Li
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
| | - Gaige Liu
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Shuli Liu
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Kaili Ma
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Lingwei Meng
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
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46
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Lin L, Li XY. Acidogenic fermentation of iron-enhanced primary sedimentation sludge under different pH conditions for production of volatile fatty acids. CHEMOSPHERE 2018; 194:692-700. [PMID: 29245135 DOI: 10.1016/j.chemosphere.2017.12.024] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Revised: 12/04/2017] [Accepted: 12/05/2017] [Indexed: 06/07/2023]
Abstract
Iron-based chemically enhanced primary sedimentation (CEPS) is increasingly adopted for wastewater treatment in mega cities, producing a large amount of sludge (Fe-sludge) with a high content of organics for potential organic resource recovery. In this experimental study, acidogenic fermentation was applied treat FeCl3-based CEPS sludge for production of volatile fatty acids (VFAs) at different pHs. Batch fermentation tests on the Fe-sludge with an organic content of 10 g-COD/L showed that the maximum VFAs production reached 2782.2 mg-COD/L in the reactor without pH control, and it reached 688.4, 3095.3, and 2603.7 mg-COD/L in reactors with pHs kept at 5.0, 6.0 and 8.0, respectively. Analysis of the acidogenesis kinetics and enzymatic activity indicated that the alkaline pH could accelerate the rate of organic hydrolysis but inhibited the further organic conversion to VFAs. In semi-continuous sludge fermentation tests, the VFAs yield in the pH6 reactor was 20% higher than that in the control reactor without pH regulation, while the VFAs yield in the pH8 reactor was 10% lower than the control. Illumina MiSeq sequencing revealed that key functional microorganisms known for effective sludge fermentation, including Bacteroidia and Erysipelotrichi, were enriched in the pH6 reactor with an enhanced VFAs production, while Clostridia became more abundant in the pH8 reactor to stand the unfavorable pH condition. The research presented acidogenic fermentation as an effective process for CEPS sludge treatment and organic resource recovery and provided the first insight into the related microbial community dynamics.
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Affiliation(s)
- Lin Lin
- Environmental Engineering Research Centre, Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Xiao-Yan Li
- Environmental Engineering Research Centre, Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong, China; Shenzhen Engineering Research Laboratory for Sludge and Food Wastes, Graduate School at Shenzhen, Tsinghua University, Shenzhen, China.
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47
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Jin N. The effect of phosphate buffer on improving the performance of autothermal thermophilic aerobic digestion for sewage sludge. RSC Adv 2018; 8:9175-9180. [PMID: 35541838 PMCID: PMC9078640 DOI: 10.1039/c8ra00793d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 02/27/2018] [Indexed: 11/21/2022] Open
Abstract
The influence of phosphate buffer on the stabilization of sewage sludge was investigated in autothermal thermophilic aerobic digestion (ATAD). A concentration series of 0.005, 0.01, 0.02 and 0.03 mol phosphate buffer for each liter of sludge was adopted. The phosphate buffer significantly enhanced the performance of the ATAD for sewage sludge. The highest VS removal was achieved by the group with 0.01 mol L-1 phosphate buffer, and the stabilization time of the sludge was shortened by 9 days compared with that of the control. The group with the optimal dosage obtained the deepest stabilization level of sludge, which was reflected by the distribution of the particle size, and achieved 6.08% VS removal higher than that of the control in the end. Lower concentrations of carbon, nitrogen and phosphate in the supernatant were also achieved by proper dosing compared with those of the control.
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Affiliation(s)
- Ningben Jin
- Shanghai Environmental Sanitation Engineering Design Institute Co., Ltd Shanghai 200232 China +86 21 54085205 +86 21 54085205
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48
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Huang X, Dong W, Wang H, Feng Y. Role of acid/alkali-treatment in primary sludge anaerobic fermentation: Insights into microbial community structure, functional shifts and metabolic output by high-throughput sequencing. BIORESOURCE TECHNOLOGY 2018; 249:943-952. [PMID: 29145121 DOI: 10.1016/j.biortech.2017.10.104] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 10/30/2017] [Accepted: 10/31/2017] [Indexed: 06/07/2023]
Abstract
This study aimed to investigate the effect of acid- or alkali-treatment on volatile fatty acids (VFAs) production and microbiological mechanism during primary sludge anaerobic fermentation. Seven fermentation experiments were conducted at different pH (3-12). Results showed that the optimal pH was 10 for accumulation of VFAs. High-throughput sequencing results indicated that acid and alkali treatment could inhibit Erysipelotrichaceae_UCG-004 and norank_p_Aminicenantes, instead of promoting Pseudomonas and Tissierella at acidic and alkaline condition, respectively. Besides, molecular ecological networks (MENs) analysis and multivariate canonical correspondence analysis (CCA) revealed that the microbial community interactions are significant different between acid and alkali treatment groups, and acetic acid was the most vital factor in the distinct bacterial community assemblages. Predictive functional profiling using marker gene sequences found that amino acid transport and metabolism was the most abundant metabolic type with 8.43-9.41%, and acid- and alkali-treatment did not benefit Stickland reaction.
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Affiliation(s)
- Xiao Huang
- School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China
| | - Wenyi Dong
- School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China; Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control, Shenzhen 518055, China
| | - Hongjie Wang
- School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China; Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control, Shenzhen 518055, China.
| | - Yangyang Feng
- School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China
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49
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He ZW, Liu WZ, Gao Q, Tang CC, Wang L, Guo ZC, Zhou AJ, Wang AJ. Potassium ferrate addition as an alternative pre-treatment to enhance short-chain fatty acids production from waste activated sludge. BIORESOURCE TECHNOLOGY 2018; 247:174-181. [PMID: 28950124 DOI: 10.1016/j.biortech.2017.09.073] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 09/07/2017] [Accepted: 09/09/2017] [Indexed: 05/16/2023]
Abstract
A potentially practical technology based on ferrate (VI), i.e. potassium ferrate (PF), pretreatment integrated into waste activated sludge (WAS) anaerobic fermentation has been presented to greatly enhance short-chain fatty acids (SCFAs) production with a shortened fermentation time. The maximum production of SCFAs, 343mg chemical oxygen demand/g volatile suspended solid with acetic acid proportion of 48.2%, was obtained with PF dosage of 56mg Fe(VI)/g total suspended solid within 5days, which was increased to 5.72times compared to that of control. The mechanism study showed that PF accelerated the release rate of both intracellular and extracellular constituents. And the activities of key hydrolytic enzymes were much improved with PF addition. Moreover, PF positively enriched the abundance of microorganisms responsible for WAS hydrolysis and SCFAs production, especially acetic acid-forming characteristic genera such as Petrimonas, Fusibacter and Acetoanaerobium. Besides, the incubation time of acidogenesis and methanogenesis were separated by PF.
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Affiliation(s)
- Zhang-Wei He
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Wen-Zong Liu
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Qin Gao
- Daqing Refining & Chemical Company, Daqing 163411, Heilongjiang, China
| | - Cong-Cong Tang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Ling Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Ze-Chong Guo
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Ai-Juan Zhou
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Ai-Jie Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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50
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Stein UH, Wimmer B, Ortner M, Fuchs W, Bochmann G. Maximizing the production of butyric acid from food waste as a precursor for ABE-fermentation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 598:993-1000. [PMID: 28468123 DOI: 10.1016/j.scitotenv.2017.04.139] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 03/31/2017] [Accepted: 04/19/2017] [Indexed: 06/07/2023]
Abstract
The current study reports on the maximization of butyric acid production from food waste using a mixed microbial fermentation. In semi-continuous fermentations the effect of three different pH values (5.5, 7.0 and 9.0), three different temperatures (37°C, 55°C and 70°C) and two levels of hydraulic retention time (HRT, 2days and 6days) on the formation of butyric acid as well as total volatile fatty acid production (tVFA) were investigated. Overall, pH5.5 provided the lowest butyric acid concentrations regardless of the temperature and the HRT. At mesophilic temperature (37°C) alkaline conditions (pH9.0) lead to a strong incline of tVFA as well as butyric acid concentration probably due to a decreased solubilization of the substrate. However, most efficient in terms of butyric acid production was the fermentation conducted at 55°C and pH7 where a butyric acid concentrations of 10.55g/L (HRT 2days) and 13.00g/L (HRT 6days) were achieved. Additional experiments at 70°C showed declining butyric acid production. Increase of the HRT from 2days to 6days provided an increment of butyric acid concentration throughout almost all experimental settings. However, regarding volumetric productivity the increase in concentration does not compensate for the bigger reactor volume required to establish a higher HRT. At pH7 and 55°C the resulting volumetric production rates were 5.27g/L∗d at a HRT 2days and only 2.17g/L∗d at a HRT of 6days.
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Affiliation(s)
- Ullrich Heinz Stein
- University of Natural Resources and Life Sciences, Institute for Environmental Biotechnology, Vienna, Austria.
| | - B Wimmer
- University of Natural Resources and Life Sciences, Institute for Environmental Biotechnology, Vienna, Austria
| | - M Ortner
- Bioenergy 2020+ GmbH, Graz, Austria
| | - W Fuchs
- University of Natural Resources and Life Sciences, Institute for Environmental Biotechnology, Vienna, Austria
| | - G Bochmann
- University of Natural Resources and Life Sciences, Institute for Environmental Biotechnology, Vienna, Austria
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