1
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Khanthong K, Kadam R, Kim T, Park J. Synergetic effects of anaerobic co-digestion of food waste and algae on biogas production. BIORESOURCE TECHNOLOGY 2023; 382:129208. [PMID: 37217150 DOI: 10.1016/j.biortech.2023.129208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Revised: 05/14/2023] [Accepted: 05/17/2023] [Indexed: 05/24/2023]
Abstract
Anaerobic co-digestion of food waste and algae was assessed to offset the drawbacks of anaerobic mono-digestion of each substrate. Batch test results indicated that a food waste and algae mixture ratio of 8:2 facilitated the highest CH4 yield (334 mL CH4/g CODInput). This ratio was applied to the anaerobic co-digestion reactor, resulting in a CH4 yield that was twice that of the anaerobic mono-digestion reactors, thereby facilitating high operational stability. In contrast to the anaerobic mono-digestion, anaerobic co-digestion resulted in stable CH4 production by overcoming volatile fatty acid accumulation and a decreased pH, even under a high organic loading rate (3 kg COD/m3∙d). Furthermore, a comparative metagenomic analysis revealed that the abundance of volatile fatty acid-oxidizing bacteria and hydrogenotrophic and methylotrophic methanogens was significantly increased in the anaerobic co-digestion reactor. These findings indicate that the anaerobic co-digestion of food waste and algae significantly improves CH4 production and process stability.
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Affiliation(s)
- Kamonwan Khanthong
- Department of Advanced Energy Engineering, Chosun University, Gwangju 61457, Republic of Korea
| | - Rahul Kadam
- Department of Advanced Energy Engineering, Chosun University, Gwangju 61457, Republic of Korea
| | - Taeyoung Kim
- Department of Environmental Engineering, Chosun University, Gwangju 61457, Republic of Korea
| | - Jungyu Park
- Department of Advanced Energy Engineering, Chosun University, Gwangju 61457, Republic of Korea.
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2
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Tawfik A, Ismail S, Elsayed M, Qyyum MA, Rehan M. Sustainable microalgal biomass valorization to bioenergy: Key challenges and future perspectives. CHEMOSPHERE 2022; 296:133812. [PMID: 35149012 DOI: 10.1016/j.chemosphere.2022.133812] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/19/2022] [Accepted: 01/28/2022] [Indexed: 05/16/2023]
Abstract
The global trend is shifting toward circular economy systems. It is a sustainable environmental approach that sustains economic growth from the use of resources while minimizing environmental impacts. The multiple industrial use of microalgal biomass has received great attention due to its high content of essential nutrients and elements. Nevertheless, low biomass productivity, unbalanced carbon to nitrogen (C/N) ratio, resistant cellular constituents, and the high cost of microalgal harvesting represent the major obstacles for valorization of algal biomass. In recent years, microalgae biomass has been a candidate as a potential feedstock for different bioenergy generation processes with simultaneous treating wastewater and CO2 capture. An overview of the appealing features and needed advancements is urgently essential for microalgae-derived bioenergy generation. The present review provides a timely outlook and evaluation of biomethane production from microalgal biomass and related challenges. Moreover, the biogas recovery potential from microalgal biomass through different pretreatments and synergistic anaerobic co-digestion (AcoD) with other biowastes are evaluated. In addition, the removal of micropollutants and heavy metals by microalgal cells via adsorption and bioaccumulation in their biomass is discussed. Herein, a comprehensive review is presented about a successive high-throughput for anaerobic digestion (AD) of the microalgal biomass in order to achieve for sustainable energy source. Lastly, the valorization of the digestate from AD of microalgae for agricultural reuse is highlighted.
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Affiliation(s)
- Ahmed Tawfik
- Water Pollution Research Department, National Research Centre, Giza, 12622, Egypt.
| | - Sherif Ismail
- Environmental Engineering Department, Zagazig University, Zagazig, 44519, Egypt
| | - Mahdy Elsayed
- Agricultural Engineering Department, Faculty of Agriculture, Cairo University, 12613, Giza, Egypt
| | - Muhammad Abdul Qyyum
- Department of Petroleum & Chemical Engineering, Sultan Qaboos University, Muscat, Oman.
| | - Mohammad Rehan
- Center of Excellence in Environmental Studies (CEES), King Abdulaziz University, Jeddah, Saudi Arabia
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3
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Wang B, Peng Q, Wang R, Yu S, Li Q, Huang C. Efficient Microcystis removal and sulfonamide-resistance gene propagation mitigation by constructed wetlands and functional genes analysis. CHEMOSPHERE 2022; 292:133481. [PMID: 34990722 DOI: 10.1016/j.chemosphere.2021.133481] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 12/24/2021] [Accepted: 12/29/2021] [Indexed: 06/14/2023]
Abstract
Increasingly prevalent Microcystis blooms and the propagation of the associated resistance genes represent global environmental problems. Constructed wetlands (CWs) are a cost-effective technology used for wastewater treatment. In this study, the herb Alisma orientale and three industrial byproducts, namely, blast furnace slag, biochar, and sawdust, were selected to construct mini-CW units. Their potential to remediate toxic Microcystis and their influences on the behaviors of antibiotic-resistant genes (ARGs, sul1, sul2, and intl1) were analyzed. Approximately 98.46% of Microcystis cells were removed by the sawdust-based CW in just 2 d, wherein <0.37 μg/L residual microcystin (MC)-LR was detected, with a removal efficiency of >96.47%, which is potentially caused by the higher relative abundance of MC-degrading gene mlrA on the substrate. Lower target ARG accumulations in the sawdust-based CW may be attributed to the lower intl1 relative abundance and microbial function mobile element content, which could influence horizontal gene transfer. In three sequential batches for the treatment of eutrophic lake water, six sawdust-based CW units were assembled into CW microcosms. The efficiency of removal of Microcystis and MC-LR by planted CW microcosms ranged between 92.00% and 95.88% and between 86.48% and 94.82%, respectively; this was significantly (P < 0.05) higher than that by unplanted ones. Less accumulation of target ARGs was also observed in planted CWs. Planting considerably improved nitrogen removal, possibly owing to the enrichment of genes involved in the KEGG nitrogen metabolism pathway in the substrate through metagenomic analysis.
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Affiliation(s)
- Bo Wang
- College of Life Science, Sichuan Normal University, Chengdu, 610041, China
| | - Qin Peng
- College of Life Science, Sichuan Normal University, Chengdu, 610041, China
| | - Rui Wang
- College of Life Science, Sichuan Normal University, Chengdu, 610041, China; Plant Functional Genomics and Bioinformatics Research Center, Sichuan Normal University, Chengdu, 610041, China; Institute of Application and Development of Plant Resources, Sichuan Normal University, Chengdu, 610041, China.
| | - Shuhua Yu
- College of Life Science, Sichuan Normal University, Chengdu, 610041, China; Plant Functional Genomics and Bioinformatics Research Center, Sichuan Normal University, Chengdu, 610041, China; Institute of Application and Development of Plant Resources, Sichuan Normal University, Chengdu, 610041, China
| | - Qi Li
- College of Life Science, Sichuan Normal University, Chengdu, 610041, China; Plant Functional Genomics and Bioinformatics Research Center, Sichuan Normal University, Chengdu, 610041, China; Institute of Application and Development of Plant Resources, Sichuan Normal University, Chengdu, 610041, China
| | - Chunping Huang
- College of Life Science, Sichuan Normal University, Chengdu, 610041, China; Plant Functional Genomics and Bioinformatics Research Center, Sichuan Normal University, Chengdu, 610041, China; Institute of Application and Development of Plant Resources, Sichuan Normal University, Chengdu, 610041, China
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4
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Sun J, Norouzi O, Mašek O. A state-of-the-art review on algae pyrolysis for bioenergy and biochar production. BIORESOURCE TECHNOLOGY 2022; 346:126258. [PMID: 34798254 DOI: 10.1016/j.biortech.2021.126258] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/26/2021] [Accepted: 10/27/2021] [Indexed: 05/18/2023]
Abstract
Algae, as a feedstock with minimum land footprint, is considered a promising biomass for sustainable fuels, chemicals, and materials. Unlike lignocellulosic biomass, algae consist mainly of lipids, carbohydrates, and proteins. This review focusses on the bio-oil and biochar co-products of algae-pyrolysis and presents the current state-of-the-art in the pyrolysis technologies and key applications of algal biochar. Algal biochar holds potential to be a cost-effective fertilizer, as it has high P, N and other nutrient contents. Beyond soil applications, algae-derived biochar has many other applications, such as wastewater-treatment, due to its porous structure and strong ion-exchange capacity. High specific capacitance and stability also make algal biochar a potential supercapacitor material. Furthermore, algal biochar can be great catalysts (or catalyst supports). This review sheds light on a wide range of algae-pyrolysis related topics, including advanced-pyrolysis techniques and the potential biochar applications in soil amendment, energy storage, catalysts, chemical industries, and wastewater-treatment plants.
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Affiliation(s)
- Jiacheng Sun
- UK Biochar Research Centre, School of Geosciences, University of Edinburgh, Crew Building, Alexander Crum Brown Road, Edinburgh EH9 3FF, UK
| | - Omid Norouzi
- Mechanical Engineering Program, School of Engineering, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Ondřej Mašek
- UK Biochar Research Centre, School of Geosciences, University of Edinburgh, Crew Building, Alexander Crum Brown Road, Edinburgh EH9 3FF, UK.
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5
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Aspergillus sp. assisted bioflocculation of Chlorella MJ 11/11 for the production of biofuel from the algal-fungal co-pellet. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118320] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Wang H, Zheng X, Yan Q, Zhang G, Kim JR. Microbial community and metabolic responses to electrical field intensity for alleviation of ammonia inhibition in an integrated bioelectrochemical system (BES). BIORESOURCE TECHNOLOGY 2021; 336:125332. [PMID: 34090099 DOI: 10.1016/j.biortech.2021.125332] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 05/18/2021] [Accepted: 05/22/2021] [Indexed: 06/12/2023]
Abstract
Bioelectrochemical system (BES) is a promising solution for mitigation of ammonia inhibition in anaerobic digestion (AD) process. However, the effect of electric field intensity on microbial community changes and metabolic function prediction during the alleviation of ammonia inhibition are still missing. The results of the current study represented that the improvement of ammonia removal (20.6%) and methane production (14.6%) could both be achieved at 0.2 V while higher voltages led to reductions of methane production (more than 48.9%) compared with the control. Moreover, hydrogenotrophic methanogens (Methanobacterium) seemed to be more robust to high voltages compared with aceticlastic methanogens (Methanosaeta). Additionally, bacteria for hydrolysis and acidogenesis (Rikenellaceae and Soehngenia) were found vulnerable to external electric field intensity. Furthermore, abundances changes of metabolic pathways demonstrated that the degradation of carbohydrates, lipids and proteins during all steps (hydrolysis, acidogenesis, acetogenesis and methanogenesis) of AD process could be affected by different applied voltages.
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Affiliation(s)
- Han Wang
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Xiaoxiao Zheng
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Qun Yan
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi 214122, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou 215011, China.
| | - Guangsheng Zhang
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Jung Rae Kim
- School of Chemical Engineering, Pusan National University, 63 Busandeahak-ro, Geumjeong-Gu, Busan 46241, Republic of Korea
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7
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Bose A, O'Shea R, Lin R, Murphy JD. A perspective on novel cascading algal biomethane biorefinery systems. BIORESOURCE TECHNOLOGY 2020; 304:123027. [PMID: 32113833 DOI: 10.1016/j.biortech.2020.123027] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 06/10/2023]
Abstract
Synergistic opportunities to combine biomethane production via anaerobic digestion whilst cultivating microalgae have been previously suggested in literature. While biomethane is a promising and flexible renewable energy vector, microalgae are increasingly gaining importance as an alternate source of food and/or feed, chemicals and energy for advanced biofuels. However, simultaneously achieving, grid quality biomethane, effective microalgal digestate treatment, high microalgae growth rate, and the most sustainable use of the algal biomass is a major challenge. In this regard, the present paper proposes multiple configurations of an innovative Cascading Algal Biomethane-Biorefinery System (CABBS) using a novel two-step bubble column-photobioreactor photosynthetic biogas upgrading technology. To overcome the limitations in choice of microalgae for optimal system operation, a microalgae composition based biorefinery decision tree has also been conceptualised to maximise profitability. Techno-economic, environmental and practical aspects have been discussed to provide a comprehensive perspective of the proposed systems.
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Affiliation(s)
- Archishman Bose
- Environmental Research Institute, MaREI Centre, University College Cork, Cork, Ireland; School of Engineering, University College Cork, Cork, Ireland
| | - Richard O'Shea
- Environmental Research Institute, MaREI Centre, University College Cork, Cork, Ireland; School of Engineering, University College Cork, Cork, Ireland.
| | - Richen Lin
- Environmental Research Institute, MaREI Centre, University College Cork, Cork, Ireland; School of Engineering, University College Cork, Cork, Ireland
| | - Jerry D Murphy
- Environmental Research Institute, MaREI Centre, University College Cork, Cork, Ireland; School of Engineering, University College Cork, Cork, Ireland
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8
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Geng S, Song K, Li L, Xie F. Improved Algal Sludge Methane Production and Dewaterability by Zerovalent Iron-Assisted Fermentation. ACS OMEGA 2020; 5:6146-6152. [PMID: 32226898 PMCID: PMC7098048 DOI: 10.1021/acsomega.0c00174] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 03/04/2020] [Indexed: 06/10/2023]
Abstract
This study investigated the methane production improvement of algal sludge by zerovalent iron (ZVI)-assisted anaerobic digestion. The zerovalent iron added were 0.5, 2, 5, 10, and 20 g·ZVI/g·TS (total solid). The results indicated that the addition of ZVI at 2, 5, 10, and 20 g·ZVI/g·TS has improved the methane production 1.07, 1.24, 1.41, and 1.46 times as compared with no ZVI added. The dewaterability of treated algal sludge has improved 1.06, 1.08, 1.08, and 1.11 times as compared with no ZVI addition. The biochemical methane production test results fitted to both one-substrate and two-substrate models. The one-substrate model indicated that the hydrolysis rate k has increased 8.21, 7.07, 9.39, 3.50, and 5.07 times as compared with R1 where no ZVI was added. The two-substrate model implied that the rapid hydrolysis rate k rapid values were 5.23, 4.5, 5.98, 2.23, and 3.23 times as compared with R1. The one-substrate model predicted that the value of methane production was in high correlation with the actual value (R 2 > 0.98). The addition of ZVI in algal sludge for methane production without an extra pretreatment process has improved the hydrolysis rate and methane production. This has the potential to be developed as an effective and economic technology in resource recovery from algal sludge.
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Affiliation(s)
- Shixiong Geng
- School
of Materials Science and Chemical Engineering, Anhui Jianzhu University, Hefei 230022, China
- State
Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Kang Song
- State
Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Lu Li
- State
Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Fazhi Xie
- School
of Materials Science and Chemical Engineering, Anhui Jianzhu University, Hefei 230022, China
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9
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Utilization of Food and Agricultural Residues for a Flexible Biogas Production: Process Stability and Effects on Needed Biogas Storage Capacities. ENERGIES 2019. [DOI: 10.3390/en12142678] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Biogas plants can contribute to future energy systems’ stability through flexible power generation. To provide power flexibly, a demand-oriented biogas supply is necessary, which may be ensured by applying flexible feeding strategies. In this study, the impacts of applying three different feeding strategies (1x, 3x and 9x feeding per day) on the biogas and methane production and process stability parameters were determined for a biogas plant with a focus on waste treatment. Two feedstocks that differed in (1) high fat and (2) higher carbohydrate content were investigated during semi-continuous fermentation tests. Measurements of the short chain fatty acids concentration, pH value, TVA/TIC ratio and total ammonium and ammonia content along with a molecular biology analysis were conducted to assess the effects on process stability. The results show that flexible biogas production can be obtained without negative impacts on the process performance and that production peaks in biogas and methane can be significantly shifted to another time by changing feeding intervals. Implementing the fermentation tests’ results into a biogas plant simulation model and an assessment of power generation scenarios focusing on peak-time power generation revealed a considerable reduction potential for the needed biogas storage capacity of up to 73.7%.
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10
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Sukhesh MJ, Rao PV. Anaerobic digestion of crop residues: Technological developments and environmental impact in the Indian context. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2018. [DOI: 10.1016/j.bcab.2018.08.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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11
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Ganesh Saratale R, Kumar G, Banu R, Xia A, Periyasamy S, Dattatraya Saratale G. A critical review on anaerobic digestion of microalgae and macroalgae and co-digestion of biomass for enhanced methane generation. BIORESOURCE TECHNOLOGY 2018; 262:319-332. [PMID: 29576518 DOI: 10.1016/j.biortech.2018.03.030] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Revised: 03/03/2018] [Accepted: 03/05/2018] [Indexed: 05/18/2023]
Abstract
Biogas production using algal resources has been widely studied as a green and alternative renewable technology. This review provides an extended overview of recent advances in biomethane production via direct anaerobic digestion (AD) of microalgae, macroalgae and co-digestion mechanism on biomethane production and future challenges and prospects for its scaled-up applications. The effects of pretreatment in the preparation of algal feedstock for methane generation are discussed briefly. The role of different operational and environmental parameters for instance pH, temperature, nutrients, organic loading rate (OLR) and hydraulic retention time (HRT) on sustainable methane generation are also reviewed. Finally, an outlook on the possible options towards the scale up and enhancement strategies has been provided. This review could encourage further studies in this area, to intend and operate continuous mode by designing stable and reliable bioreactor systems and to analyze the possibilities and potential of co-digestion for the promotion of algal-biomethane technology.
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Affiliation(s)
- Rijuta Ganesh Saratale
- Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyeonggido 10326, Republic of Korea
| | - Gopalakrishnan Kumar
- School of Civil and Environmental Engineering, Yonsei University, Seoul 38722, Republic of Korea
| | - Rajesh Banu
- Department of Civil Engineering, Regional Centre of Anna University, Tirunelveli, India
| | - Ao Xia
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400044, China
| | | | - Ganesh Dattatraya Saratale
- Department of Food Science and Biotechnology, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyeonggido 10326, Republic of Korea.
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12
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Vo HNP, Bui XT, Nguyen TT, Nguyen DD, Dao TS, Cao NDT, Vo TKQ. RETRACTED: Effects of nutrient ratios and carbon dioxide bio-sequestration on biomass growth of Chlorella sp. in bubble column photobioreactor. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 219:1-8. [PMID: 29715637 DOI: 10.1016/j.jenvman.2018.04.109] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 04/20/2018] [Accepted: 04/24/2018] [Indexed: 06/08/2023]
Abstract
This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Editors-in-Chief. The article is a duplicate of a paper that has already been published in [Bioresource Technology, volume 208 (2016) 1 - 6. https://doi.org/10.1016/j.biortech.2016.02.043]. Redundant publications overweigh the relative importance of published findings and distort the academic record of the authors. One of the conditions of submission of a paper for publication is therefore that authors declare explicitly that the paper has not been previously published and is not under consideration for publication elsewhere. As such this article represents a misuse of the scientific publishing system. The scientific community takes a very strong view on this matter and apologies are offered to readers of the journal that this was not detected during the submission process.
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Affiliation(s)
- Hoang-Nhat-Phong Vo
- Environmental Engineering and Management Research Group & Faculty of Environment and Labor Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam.
| | - Xuan-Thanh Bui
- Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology, VNU-HCM, Viet Nam.
| | - Thanh-Tin Nguyen
- Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang, Viet Nam
| | - Dinh Duc Nguyen
- Department of Environmental Energy Engineering, Kyonggi University, Suwon-si, Gyeonggi-do, 442-760, Republic of Korea.
| | - Thanh-Son Dao
- Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology, VNU-HCM, Viet Nam
| | - Ngoc-Dan-Thanh Cao
- Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang, Viet Nam
| | - Thi-Kim-Quyen Vo
- Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang, Viet Nam
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13
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Vo Hoang Nhat P, Ngo HH, Guo WS, Chang SW, Nguyen DD, Nguyen PD, Bui XT, Zhang XB, Guo JB. Can algae-based technologies be an affordable green process for biofuel production and wastewater remediation? BIORESOURCE TECHNOLOGY 2018; 256:491-501. [PMID: 29472123 DOI: 10.1016/j.biortech.2018.02.031] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 02/04/2018] [Accepted: 02/05/2018] [Indexed: 06/08/2023]
Abstract
Algae is a well-known organism that its characteristic is prominent for biofuel production and wastewater remediation. This critical review aims to present the applicability of algae with in-depth discussion regarding three key aspects: (i) characterization of algae for its applications; (ii) the technical approaches and their strengths and drawbacks; and (iii) future perspectives of algae-based technologies. The process optimization and combinations with other chemical and biological processes have generated efficiency, in which bio-oil yield is up to 41.1%. Through life cycle assessment, algae bio-energy achieves high energy return than fossil fuel. Thus, the algae-based technologies can reasonably be considered as green approaches. Although selling price of algae bio-oil is still high (about $2 L-1) compared to fossil fuel's price of $1 L-1, it is expected that the algae bio-oil's price will become acceptable in the next coming decades and potentially dominate 75% of the market.
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Affiliation(s)
- P Vo Hoang Nhat
- Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia and Department of Environmental and Municipal Engineering, TianjinChengjian University, Tianjin 300384, China
| | - H H Ngo
- Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia and Department of Environmental and Municipal Engineering, TianjinChengjian University, Tianjin 300384, China.
| | - W S Guo
- Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia and Department of Environmental and Municipal Engineering, TianjinChengjian University, Tianjin 300384, China
| | - S W Chang
- Department of Environmental Energy & Engineering, Kyonggi University, 442-760, Republic of Korea
| | - D D Nguyen
- Department of Environmental Energy & Engineering, Kyonggi University, 442-760, Republic of Korea; Institution of Research and Development, Duy Tan University, Da Nang, Viet Nam
| | - P D Nguyen
- Faculty of Environment and Natural Resources, University of Technology, Vietnam National University-Ho Chi Minh, District 10, Ho Chi Minh City, Viet Nam
| | - X T Bui
- Faculty of Environment and Natural Resources, University of Technology, Vietnam National University-Ho Chi Minh, District 10, Ho Chi Minh City, Viet Nam
| | - X B Zhang
- Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia and Department of Environmental and Municipal Engineering, TianjinChengjian University, Tianjin 300384, China
| | - J B Guo
- Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia and Department of Environmental and Municipal Engineering, TianjinChengjian University, Tianjin 300384, China
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14
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Zan F, Dai J, Hong Y, Wong M, Jiang F, Chen G. The characteristics of household food waste in Hong Kong and their implications for sewage quality and energy recovery. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 74:63-73. [PMID: 29208531 DOI: 10.1016/j.wasman.2017.11.051] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 11/21/2017] [Accepted: 11/27/2017] [Indexed: 06/07/2023]
Abstract
Food waste (FW) is a worldwide environmental issue due to its huge production amount. FW separation from municipal solid waste followed by different treatment strategies has been widely accepted. Food waste disposer (FWD) is a promising approach to separate and collect household food waste (HFW), which has been widely applied in many countries. However, the feasibility of FWD application in many countries is still being debated due to the major concerns over the impact of FWD on the wastewater treatment plants. In order to investigate the feasibility of FWD application, FW characterization is a key work to be conducted in advance. Since the FW characteristics largely vary by region, reliable and representative FW characteristics in different countries should be investigated. To provide such information for further studies on FW management for Hong Kong, HFW was collected from Hong Kong typical households over one year and analyzed systemically in this study. The FW composition varied little from place to place or season to season, and the values observed were comparable with results reported from other countries and regions. Based on the reliable HFW characteristics obtained from one-year survey coupled with statistical analysis, simulated HFW for Hong Kong consisting of 50% fruits, 20% vegetables, 20% starchy food and 10% meat was proposed for future studies. On the other hand, the FWD treatment caused more than 50% of the biodegradable organic content in HFW to dissolve. With a ratio of 1 g food waste to 1 L sewage, total solids in the wastewater stream were predicted to increase by 73%, total chemical oxygen demand by 61%, soluble chemical oxygen demand by 110%, nitrogen by 6% and phosphorus by 16%. Theoretically, 22 million m3/year of additional methane could be generated if 50% of Hong Kong residential buildings equipped with FWD. That would certainly increase pollutant loading on the wastewater treatment plants, but also energy recovery potential.
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Affiliation(s)
- Feixiang Zan
- Department of Civil and Environmental Engineering, Water Technology Center, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Clear Water Bay, Hong Kong
| | - Ji Dai
- Department of Civil and Environmental Engineering, Water Technology Center, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Clear Water Bay, Hong Kong.
| | - Yuze Hong
- Department of Civil and Environmental Engineering, Water Technology Center, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Clear Water Bay, Hong Kong
| | - Meiyin Wong
- Department of Civil and Environmental Engineering, Water Technology Center, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Clear Water Bay, Hong Kong
| | - Feng Jiang
- School of Chemistry & Environment, South China Normal University, Guangzhou, China.
| | - Guanghao Chen
- Department of Civil and Environmental Engineering, Water Technology Center, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Clear Water Bay, Hong Kong; Fok Ying Tung Research Institute, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
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15
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Food Waste to Energy: An Overview of Sustainable Approaches for Food Waste Management and Nutrient Recycling. BIOMED RESEARCH INTERNATIONAL 2017; 2017:2370927. [PMID: 28293629 PMCID: PMC5331173 DOI: 10.1155/2017/2370927] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 12/29/2016] [Accepted: 01/12/2017] [Indexed: 01/06/2023]
Abstract
Food wastage and its accumulation are becoming a critical problem around the globe due to continuous increase of the world population. The exponential growth in food waste is imposing serious threats to our society like environmental pollution, health risk, and scarcity of dumping land. There is an urgent need to take appropriate measures to reduce food waste burden by adopting standard management practices. Currently, various kinds of approaches are investigated in waste food processing and management for societal benefits and applications. Anaerobic digestion approach has appeared as one of the most ecofriendly and promising solutions for food wastes management, energy, and nutrient production, which can contribute to world's ever-increasing energy requirements. Here, we have briefly described and explored the different aspects of anaerobic biodegrading approaches for food waste, effects of cosubstrates, effect of environmental factors, contribution of microbial population, and available computational resources for food waste management researches.
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16
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Pagliano G, Ventorino V, Panico A, Pepe O. Integrated systems for biopolymers and bioenergy production from organic waste and by-products: a review of microbial processes. BIOTECHNOLOGY FOR BIOFUELS 2017; 10:113. [PMID: 28469708 PMCID: PMC5414342 DOI: 10.1186/s13068-017-0802-4] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 04/23/2017] [Indexed: 05/07/2023]
Abstract
Recently, issues concerning the sustainable and harmless disposal of organic solid waste have generated interest in microbial biotechnologies aimed at converting waste materials into bioenergy and biomaterials, thus contributing to a reduction in economic dependence on fossil fuels. To valorize biomass, waste materials derived from agriculture, food processing factories, and municipal organic waste can be used to produce biopolymers, such as biohydrogen and biogas, through different microbial processes. In fact, different bacterial strains can synthesize biopolymers to convert waste materials into valuable intracellular (e.g., polyhydroxyalkanoates) and extracellular (e.g., exopolysaccharides) bioproducts, which are useful for biochemical production. In particular, large numbers of bacteria, including Alcaligenes eutrophus, Alcaligenes latus, Azotobacter vinelandii, Azotobacter chroococcum, Azotobacter beijerincki, methylotrophs, Pseudomonas spp., Bacillus spp., Rhizobium spp., Nocardia spp., and recombinant Escherichia coli, have been successfully used to produce polyhydroxyalkanoates on an industrial scale from different types of organic by-products. Therefore, the development of high-performance microbial strains and the use of by-products and waste as substrates could reasonably make the production costs of biodegradable polymers comparable to those required by petrochemical-derived plastics and promote their use. Many studies have reported use of the same organic substrates as alternative energy sources to produce biogas and biohydrogen through anaerobic digestion as well as dark and photofermentation processes under anaerobic conditions. Therefore, concurrently obtaining bioenergy and biopolymers at a reasonable cost through an integrated system is becoming feasible using by-products and waste as organic carbon sources. An overview of the suitable substrates and microbial strains used in low-cost polyhydroxyalkanoates for biohydrogen and biogas production is given. The possibility of creating a unique integrated system is discussed because it represents a new approach for simultaneously producing energy and biopolymers for the plastic industry using by-products and waste as organic carbon sources.
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Affiliation(s)
- Giorgia Pagliano
- Division of Microbiology, Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici, 80055 Naples, Italy
| | - Valeria Ventorino
- Division of Microbiology, Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici, 80055 Naples, Italy
| | | | - Olimpia Pepe
- Division of Microbiology, Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici, 80055 Naples, Italy
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17
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Zhang H, Zhang F, Huang Q. Highly effective removal of malachite green from aqueous solution by hydrochar derived from phycocyanin-extracted algal bloom residues through hydrothermal carbonization. RSC Adv 2017. [DOI: 10.1039/c6ra27782a] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Huge volumes of harmful algal bloom residues (ABR) are collected during emergency treatment of cyanobacteria blooms, and phycocyanin-extracted algal bloom residues (PE-ABR) are produced after extraction of phycocyanin from ABR.
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Affiliation(s)
- Hong Zhang
- Institute of Technical Biology and Agriculture Engineering
- Hefei Institutes of Physical Science
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - Fayu Zhang
- School of Resources and Environmental Engineering
- Hefei University of Technology
- Hefei
- China
| | - Qing Huang
- Institute of Technical Biology and Agriculture Engineering
- Hefei Institutes of Physical Science
- Chinese Academy of Sciences
- Hefei 230031
- China
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18
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Ding L, Cheng J, Xia A, Jacob A, Voelklein M, Murphy JD. Co-generation of biohydrogen and biomethane through two-stage batch co-fermentation of macro- and micro-algal biomass. BIORESOURCE TECHNOLOGY 2016; 218:224-31. [PMID: 27371795 DOI: 10.1016/j.biortech.2016.06.092] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 06/22/2016] [Accepted: 06/23/2016] [Indexed: 05/11/2023]
Abstract
Aquatic micro-algae can be used as feedstocks for gaseous biofuel production via biological fermentation. However, micro-algae usually have low C/N ratios, which are not advantageous for fermentation. In this study, carbon-rich macro-algae (Laminaria digitata) mixed with nitrogen-rich micro-algae (Chlorella pyrenoidosa and Nannochloropsis oceanica) were used to maintain a suitable C/N ratio of 20 for a two-stage process combining hydrogen and methane fermentation. Co-fermentation of L. digitata and micro-algae facilitated hydrolysis and acidogenesis, resulting in hydrogen yields of 94.5-97.0mL/gVS; these values were 15.5-18.5% higher than mono-fermentation using L. digitata. Through the second stage of methane co-fermentation, a large portion of energy remaining in the hydrogenogenic effluents was recovered in the form of biomethane. The two-stage batch co-fermentation markedly increased the energy conversion efficiencies (ECEs) from 4.6-6.6% during the hydrogen fermentation to 57.0-70.9% in the combined hydrogen and methane production.
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Affiliation(s)
- Lingkan Ding
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; MaREI Centre, Environmental Research Institute, University College Cork, Cork, Ireland
| | - Jun Cheng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
| | - Ao Xia
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400044, China
| | - Amita Jacob
- MaREI Centre, Environmental Research Institute, University College Cork, Cork, Ireland
| | - Markus Voelklein
- MaREI Centre, Environmental Research Institute, University College Cork, Cork, Ireland
| | - Jerry D Murphy
- MaREI Centre, Environmental Research Institute, University College Cork, Cork, Ireland; School of Engineering, University College Cork, Cork, Ireland
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Wang Y, Zang B, Li G, Liu Y. Evaluation the anaerobic hydrolysis acidification stage of kitchen waste by pH regulation. WASTE MANAGEMENT (NEW YORK, N.Y.) 2016; 53:62-7. [PMID: 27156363 DOI: 10.1016/j.wasman.2016.04.018] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Revised: 03/22/2016] [Accepted: 04/13/2016] [Indexed: 05/28/2023]
Abstract
This study analyzed the composition and characteristic of kitchen waste (KW) from closed cleaning station of Chaoyang District, Beijing. It was featured by high vegetables and peels contents. This study investigated effect of pH regulation and uncontrolled pH (CK) on the lab-scale anaerobic hydrolysis acidification stage of KW. The optimal adjusting mode by NaOH (including dosage and frequency) was evaluated according to indexes of pH, VFAs, NH4(+)-N, TS, VS, TS/VS, TS and VS removal rate. The treatment 4 as first two days adjusting per 16h and then one time per day at pH 7 was chosen as the optimal mode with high VFAs content(47.31g/L), TS and VS removal rate (42.95% and 54.01%, respectively), low adjusting frequency, fewer dosage and practical operability. Thus, adjusting mode of treatment 4 could be considered using in anaerobic hydrolysis acidification stage on engineering.
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Affiliation(s)
- Yaya Wang
- College of Agronomy and Biotechnology/Center of Biomass Engineering, China Agricultural University, Beijing 100193, China; College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Bing Zang
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Guoxue Li
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China.
| | - Yu Liu
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
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20
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Anaerobic Co-Digestion Biomethanation of Cannery Seafood Wastewater with Microcystis SP; Blue Green Algae with/without Glycerol Waste. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.egypro.2015.11.487] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Hidaka T, Inoue K, Suzuki Y, Tsumori J. Growth and anaerobic digestion characteristics of microalgae cultivated using various types of sewage. BIORESOURCE TECHNOLOGY 2014; 170:83-89. [PMID: 25127007 DOI: 10.1016/j.biortech.2014.07.061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 07/14/2014] [Accepted: 07/16/2014] [Indexed: 06/03/2023]
Abstract
Microalgal cultivation combined with anaerobic digestion at wastewater treatment plants is promising to recover energy. This study investigated the growth and anaerobic digestion characteristics of microalgae cultivated using nutrients in sewage. Microalgae were cultivated using primary effluent, secondary effluent, and dewatering filtrate. Microscopic observation indicated that Chlorella was cultivated using dewatering filtrate of anaerobic digestion without controlling the type of species. Batch anaerobic digestion experiments with digested sludge showed that the methane conversion ratio of the cultivated mixture was approximately 40-65%. Different cultivation time did not affect the microalgal contents. Methane recovery mass was 0.13NL-methane/L-cultivation liquor. The C/N ratio of the cultivated mixture was approximately 3-5, but the apparent ammonia release ratio was smaller than that of sewage sludge during digestion. These results proved the applicability of methane recovery from microalgae cultivated using nutrients included in anaerobically digested sludge.
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Affiliation(s)
- Taira Hidaka
- Recycling Research Team, Materials and Resources Research Group, Public Works Research Institute, 1-6, Minamihara, Tsukuba, Ibaraki 305-8516, Japan.
| | - Kenichiro Inoue
- Recycling Research Team, Materials and Resources Research Group, Public Works Research Institute, 1-6, Minamihara, Tsukuba, Ibaraki 305-8516, Japan
| | - Yutaka Suzuki
- Recycling Research Team, Materials and Resources Research Group, Public Works Research Institute, 1-6, Minamihara, Tsukuba, Ibaraki 305-8516, Japan
| | - Jun Tsumori
- Recycling Research Team, Materials and Resources Research Group, Public Works Research Institute, 1-6, Minamihara, Tsukuba, Ibaraki 305-8516, Japan
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22
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Li Y, Zhang R, He Y, Zhang C, Liu X, Chen C, Liu G. Anaerobic co-digestion of chicken manure and corn stover in batch and continuously stirred tank reactor (CSTR). BIORESOURCE TECHNOLOGY 2014; 156:342-347. [PMID: 24531118 DOI: 10.1016/j.biortech.2014.01.054] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 01/13/2014] [Accepted: 01/15/2014] [Indexed: 06/03/2023]
Abstract
Anaerobic co-digestion of chicken manure and corn stover in batch and CSTR were investigated. The batch co-digestion tests were performed at an initial volatile solid (VS) concentration of 3gVS/L, carbon-to-nitrogen (C/N) ratio of 20, and retention time of 30d. The methane yield was determined to be 281±12mL/gVSadded. Continuous reactor was carried out with feeding concentration of 12% total solids and C/N ratio of 20 at organic loading rates (OLRs) of 1-4gVS/L/d. Results showed that at OLR of 4gVS/L/d, stable and preferable methane yield of 223±7mL/gVSadded was found, which was equal to energy yield (EY) of 8.0±0.3MJ/kgVSadded. Post-digestion of digestate gave extra EY of 1.5-2.6MJ/kgVSadded. Pyrolysis of digestate provided additional EY of 6.1MJ/kgVSadded. Pyrolysis can be a promising technique to reduce biogas residues and to produce valuable gas products simultaneously.
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Affiliation(s)
- Yeqing Li
- Biomass Energy and Environmental Engineering Research Center, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Ruihong Zhang
- Biomass Energy and Environmental Engineering Research Center, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China; Department of Biological and Agricultural Engineering, University of California, Davis, CA 95616, United States
| | - Yanfeng He
- Biomass Energy and Environmental Engineering Research Center, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chenyu Zhang
- Biomass Energy and Environmental Engineering Research Center, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xiaoying Liu
- Biomass Energy and Environmental Engineering Research Center, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chang Chen
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Guangqing Liu
- Biomass Energy and Environmental Engineering Research Center, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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23
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Miao H, Lu M, Zhao M, Huang Z, Ren H, Yan Q, Ruan W. Enhancement of Taihu blue algae anaerobic digestion efficiency by natural storage. BIORESOURCE TECHNOLOGY 2013; 149:359-366. [PMID: 24128398 DOI: 10.1016/j.biortech.2013.09.071] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 09/13/2013] [Accepted: 09/17/2013] [Indexed: 06/02/2023]
Abstract
Taihu blue algae after different storage time from 0 to 60 d were anaerobic fermented to evaluate their digestibility and process stability. Results showed that anaerobic digestion (AD) of blue algae under 15 d natural storage led to the highest CH4 production of 287.6 mL g(-1) VS at inoculum substrate ratio 2.0, demonstrating 36.69% improvement comparing with that from fresh algae. Storage of blue algae led to cell death, microcystins (MCs) release and VS reduction by spontaneous fermentation. However, it also played an important role in removing algal cell wall barrier, pre-hydrolysis and pre-acidification, leading to the improvement in CH4 yield. Closer examination of volatile fatty acids (VFA) variation, VS removal rates and key enzymes change during AD proved short storage time (≤ 15 d) of blue algae had higher efficiencies in biodegradation and methanation. Furthermore, AD presented significant biodegradation potential for MCs released from Taihu blue algae.
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Affiliation(s)
- Hengfeng Miao
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
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24
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Hidaka T, Wang F, Togari T, Uchida T, Suzuki Y. Comparative performance of mesophilic and thermophilic anaerobic digestion for high-solid sewage sludge. BIORESOURCE TECHNOLOGY 2013; 149:177-183. [PMID: 24096284 DOI: 10.1016/j.biortech.2013.09.033] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Revised: 09/04/2013] [Accepted: 09/06/2013] [Indexed: 06/02/2023]
Abstract
In local cities, many small sewage and waste treatment facilities are operated independently. To encourage processing by anaerobic digestion at a centralized sewage treatment plant (STP), high-solid sewage sludge is helpful because it reduces the energy and cost required for transporting the sludge from other STPs. Mesophilic and thermophilic anaerobic digestion of sewage sludge at total solids concentrations (TS) of 7.5% and 10% were evaluated using laboratory-scale continuous reactors. Under the mesophilic condition, sewage sludge of 10% TS was successfully treated. Under the thermophilic condition, sewage sludge of 7.5% TS was not successfully treated when the total ammonia concentration was over 2000 mg N/L. Batch experiments showed that it takes a few weeks for the methane fermentation activity to recover after being inhibited. The effectiveness of adding easily biodegradable organic matter was confirmed. These results show that high-solid sewage sludge is suitable for small facilities by controlling the operating conditions.
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Affiliation(s)
- Taira Hidaka
- Recycling Research Team, Materials and Resources Research Group, Public Works Research Institute, 1-6, Minamihara, Tsukuba, Ibaraki 305-8516, Japan.
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