1
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Zhou B, Wang D, Zhao G, Zhang M, Liu X, Zhang D, Liang J, Zhou L. Effects of food waste hydrolysate as an external carbon source on defoaming in wastewater treatment with activated sludge process. BIORESOURCE TECHNOLOGY 2024:130900. [PMID: 38801956 DOI: 10.1016/j.biortech.2024.130900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/24/2024] [Accepted: 05/24/2024] [Indexed: 05/29/2024]
Abstract
The activated sludge process is the most widely used technology for treating municipal wastewater. However, thick foam often occurs in activated sludge process. Here, we reported for the first time the effect of food waste hydrolysate (FWH) as an external carbon source on defoaming in activated sludge process. The study found that FWH was effective in defoaming at a wide dose range of 50-1600 mg/L total solids, as exhibiting that the foaming tendency of FWH-added foam mixed liquor was reduced to 0 mL-foam/mL-air·min from initial 0.171 mL-foam/mL-air·min in the control without adding FWH with 100 % of defoaming efficiency. Fatty acids, oils, and solid particles in FWH jointly contributed to the deformation. Among these factors, the concentration of long-chain unsaturated fatty acids was mainly responsible for the defoaming. This work provides a cost-effective strategy to solve the foaming problem in activated sludge process as well as providing external carbon sources.
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Affiliation(s)
- Bo Zhou
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Dianzhan Wang
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China
| | - Guangliang Zhao
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Mingjiang Zhang
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Xuan Liu
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Dejin Zhang
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jianru Liang
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China
| | - Lixiang Zhou
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China.
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2
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Ruiz-Bastidas RC, Ochoa-Durán C, Sanabria J, Cadavid-Rodríguez LS. Effect of Ecuadorian natural zeolite on the performance of anaerobic digestion of swine waste in semicontinuous regime. CHEMOSPHERE 2024; 352:141517. [PMID: 38387656 DOI: 10.1016/j.chemosphere.2024.141517] [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: 11/19/2023] [Revised: 01/29/2024] [Accepted: 02/20/2024] [Indexed: 02/24/2024]
Abstract
This study explores the potential of zeolite as an amendment to mitigate ammonium inhibition in the anaerobic digestion of swine waste. Two 50 L reactors, one with and one without zeolite amendment were operated at an OLR of 3.0 g VS L-1d-1 for 130 days, and fed with swine waste from a full-scale pig farm. Under these conditions, zeolite doses of 4 g L-1 allowed total ammonia nitrogen (TAN) concentrations to be kept below 1000 mgNH3-N L-1. The zeolite-amended reactor not only showed an average increase of 8% in methane production under stable conditions but also exhibited 34% reduction in H2S concentrations in the biogas, compared to the reactor without zeolite. The community of archaea originating from the inoculum was conserved in the reactor with zeolite amendment, particularly the acetoclastic methanogens of the genus Methanosaeta. On the other hand, in the reactor without zeolite addition, the microbial community went from being dominated by the acetoclastic methanogen Methanosaeta to having a high relative abundance of hydrogenotrophic methanogens. The zeolite addition also favoured the reactor stability, prevented foaming, and produced an enriched natural zeolite with N, P and K. However, additional studies on the potential of enriched zeolite as a fertilizer are required, which could make the use of zeolite in Anaerobic Digestion of swine waste not only energetically favourable but also economically feasible.
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Affiliation(s)
- Rosa Cecilia Ruiz-Bastidas
- Universidad Nacional de Colombia - Sede Medellín, Facultad de Ciencias, Cra. 65 #59a-110, Medellín, 050034, Colombia.
| | - Camilo Ochoa-Durán
- Universidad Nacional de Colombia - Sede Palmira, Facultad de Ingeniería y Administración, Departamento de Ingeniería, Cra. 32 No 12-00, Palmira, 763533, Colombia
| | - Janeth Sanabria
- Universidad del Valle, Microbiology and Environmental Biotechnology Laboratory, Cali, 760042, Colombia
| | - Luz Stella Cadavid-Rodríguez
- Universidad Nacional de Colombia - Sede Palmira, Facultad de Ingeniería y Administración, Departamento de Ingeniería, Cra. 32 No 12-00, Palmira, 763533, Colombia.
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3
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Duong CM, Lim TT. Optimization and microbial diversity of anaerobic co-digestion of swine manure with waste kitchen oil at high organic loading rates. WASTE MANAGEMENT (NEW YORK, N.Y.) 2022; 154:199-208. [PMID: 36252449 DOI: 10.1016/j.wasman.2022.09.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 09/27/2022] [Accepted: 09/30/2022] [Indexed: 06/16/2023]
Abstract
Anaerobic co-digestion of swine manure (SM) and waste kitchen oil (WKO) was conducted to evaluate the effect of high organic loading rates (OLRs) on biogas production efficiency and microbial changes. Combinations of different loading rates of SM and WKO, with total OLRs from 2 to 8 g VS (volatile solid)/L/d, were evaluated in a laboratory-scale study. While feeding more than 4 g VSSM/L/d did not result in higher biogas production in both mono- and co-digestion scenarios, the addition of WKO increased the total OLR up to 6 g VS/L/d without significant reduction of system productivity. Biogas yields of M2O1 (2 g VSSM/L/d + 1 g VSWKO/L/d) and M4O2 were 910 ± 35 and 849 ± 85 mL/g VSfed which were 25.2 % and 16.9 % higher than the mono-digestion of M2, respectively. A significant increase of bacterial alpha-diversity (Shannon index) was observed in M2O1, at 233.0 ± 3.6 compared with 218.7 ± 5.1 of M2 (p < 0.05). Less bacterial alpha-diversity and accumulation of volatile fatty acids were observed in M4O1 and M4O2, suggesting their potential instability. When digesters were fed with M2, the introduction of 1.4 g VSWKO/L/d or more did not increase biogas yield and could cause system imbalance. The study suggests the limit of WKO could be increased when higher OLRs of SM were applied but should not be more than 4 g VSSM/L/d, and ratio between SM and WKO should be considered to avoid failure. Some of the system disturbances took up to three months to show.
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Affiliation(s)
- Cuong Manh Duong
- Plant Science & Technology, University of Missouri, Columbia, MO 65211-5200, USA; Thai Nguyen University of Agriculture and Forestry, Thai Nguyen, Viet Nam.
| | - Teng-Teeh Lim
- Plant Science & Technology, University of Missouri, Columbia, MO 65211-5200, USA
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Kubar AA, Ali A, Kumar S, Huo S, Ullah MW, Alabbosh KFS, Ikram M, Cheng J. Dynamic Foam Characteristics during Cultivation of Arthrospira platensis. Bioengineering (Basel) 2022; 9:bioengineering9060257. [PMID: 35735500 PMCID: PMC9220301 DOI: 10.3390/bioengineering9060257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 05/29/2022] [Accepted: 06/09/2022] [Indexed: 11/16/2022] Open
Abstract
This study is aimed at understanding the serious foaming problems during microalgal cultivation in industrial raceway ponds by studying the dynamic foam properties in Arthrospira platensis cultivation. A. platensis was cultivated in a 4 L bowl bioreactor for 4 days, during which the foam height above the algal solution increased from 0 to 30 mm with a bubble diameter of 1.8 mm, and biomass yield reached 1.5 g/L. The algal solution surface tension decreased from 55 to 45 mN/m, which favored the adsorption of microalgae on the bubble to generate more stable foams. This resulted in increased foam stability (FS) from 1 to 10 s, foam capacity (FC) from 0.3 to 1.2, foam expansion (FE) from 15 to 43, and foam maximum density (FMD) from 0.02 to 0.07. These results show a decrease in CO2 flow rate and operation temperature when using the Foamscan instrument, which minimized the foaming phenomenon in algal solutions to a significantly lower and acceptable level.
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Affiliation(s)
- Ameer Ali Kubar
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China;
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China;
| | - Amjad Ali
- Research School of Polymeric Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
| | - Santosh Kumar
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China;
| | - Shuhao Huo
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China;
- Correspondence: (S.H.); (J.C.)
| | - Muhammad Wajid Ullah
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China;
| | | | - Muhammad Ikram
- Department of Pharmacy, COMSATS University Islamabad, Abbottabad Campus, Abbottabad 22060, Pakistan;
| | - Jun Cheng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China;
- Correspondence: (S.H.); (J.C.)
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5
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Ohnmacht B, Lemmer A, Oechsner H, Kress P. Demand-oriented biogas production and biogas storage in digestate by flexibly feeding a full-scale biogas plant. BIORESOURCE TECHNOLOGY 2021; 332:125099. [PMID: 33862386 DOI: 10.1016/j.biortech.2021.125099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/24/2021] [Accepted: 03/26/2021] [Indexed: 06/12/2023]
Abstract
This work studied the demand-oriented biogas production and the biogas storage in digestate by flexibly feeding a full-scale research biogas plant. The investigated continuous stirred tank reactor (CSTR) was equipped with a fast-moving submersible motor mixer and a slow-moving inclined shaft agitator. A model for the biogas storage in digestate was introduced and tested in full scale using temporally highly resolved volume flow measurements. An increase in mixing time led to a faster biogas production: A two to five hours reduction of the time to reach the maximum biogas production after feeding occurred in our experiments. However, no influence of the rheology and of the mixing regime on the methane yield could be derived from the measurements. Further, a 30% reduction of the stored biogas in the digestate occurred when the viscosity was lowered by 66%. This knowledge can be used to enhance the existing biogas formation models.
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Affiliation(s)
- Benjamin Ohnmacht
- University of Hohenheim, State Institute of Agricultural Engineering and Bioenergy, Garbenstr. 9, Stuttgart 70599, Germany.
| | - Andreas Lemmer
- University of Hohenheim, State Institute of Agricultural Engineering and Bioenergy, Garbenstr. 9, Stuttgart 70599, Germany
| | - Hans Oechsner
- University of Hohenheim, State Institute of Agricultural Engineering and Bioenergy, Garbenstr. 9, Stuttgart 70599, Germany
| | - Philipp Kress
- University of Hohenheim, State Institute of Agricultural Engineering and Bioenergy, Garbenstr. 9, Stuttgart 70599, Germany
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6
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Huo W, Wang X, Wei Z, Zhang H, Liu Q, Zhang S, Wang C, Chen L, Xu Q, Guo G. Effect of lactic acid bacteria on the ensiling characteristics and in vitro ruminal fermentation parameters of alfalfa silage. ITALIAN JOURNAL OF ANIMAL SCIENCE 2021. [DOI: 10.1080/1828051x.2021.1906167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Wenjie Huo
- Animal Sciences College, Shanxi Agricultural University, Jinzhong, China
| | - Xinyu Wang
- Animal Sciences College, Shanxi Agricultural University, Jinzhong, China
| | - Zhixia Wei
- Animal Sciences College, Shanxi Agricultural University, Jinzhong, China
| | - Haixuan Zhang
- Animal Sciences College, Shanxi Agricultural University, Jinzhong, China
| | - Qiang Liu
- Animal Sciences College, Shanxi Agricultural University, Jinzhong, China
| | - Shuanlin Zhang
- Animal Sciences College, Shanxi Agricultural University, Jinzhong, China
| | - Cong Wang
- Animal Sciences College, Shanxi Agricultural University, Jinzhong, China
| | - Lei Chen
- Animal Sciences College, Shanxi Agricultural University, Jinzhong, China
| | - Qingfang Xu
- Animal Sciences College, Shanxi Agricultural University, Jinzhong, China
| | - Gang Guo
- Animal Sciences College, Shanxi Agricultural University, Jinzhong, China
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7
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Mahmudul HM, Rasul MG, Akbar D, Narayanan R, Mofijur M. A comprehensive review of the recent development and challenges of a solar-assisted biodigester system. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 753:141920. [PMID: 32889316 DOI: 10.1016/j.scitotenv.2020.141920] [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: 06/18/2020] [Revised: 08/20/2020] [Accepted: 08/22/2020] [Indexed: 06/11/2023]
Abstract
The extensive use of fossil fuels and the environmental effect of their combustion products have attracted researchers to look into renewable energy sources. In addition, global mass production of waste has motivated communities to recycle and reuse the waste in a sustainable way to lower landfill waste and associated problems. The development of waste to energy (WtE) technology including the production of bioenergy, e.g. biogas produced from various waste through Anaerobic Digestion (AD), is considered one of the potential measures to achieve the sustainable development goals of the United Nations (UN). Therefore, this study reviews the most recent studies from relevant academic literature on WtE technology (particularly AD technology) for biogas production and the application of a solar-assisted biodigester (SAB) system aimed at improving performance. In addition, socio-economic factors, challenges, and perspectives have been reported. From the analysis of different technologies, further work on effective low-cost technologies is recommended, especially using SAB system upgrading and leveraging the opportunities of this system. The study found that the performance of the AD system is affected by a variety of factors and that different approaches can be applied to improve performance. It has also been found that solar energy systems efficiently raise the biogas digester temperature and through this, they maximize the biogas yield under optimum conditions. The study revealed that the solar-assisted AD system produces less pollution and improves performance compared to the conventional AD system.
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Affiliation(s)
- H M Mahmudul
- School of Engineering and Technology, Central Queensland University, QLD 4701, Australia; Clean Energy Academy, Central Queensland University, QLD 4701, Australia.
| | - M G Rasul
- School of Engineering and Technology, Central Queensland University, QLD 4701, Australia; Clean Energy Academy, Central Queensland University, QLD 4701, Australia
| | - D Akbar
- School of Business and Law, Central Queensland University, QLD 4701, Australia
| | - R Narayanan
- School of Engineering and Technology, Central Queensland University, QLD 4701, Australia; Clean Energy Academy, Central Queensland University, QLD 4701, Australia
| | - M Mofijur
- School of Information, Systems and Modelling, University of Technology Sydney, NSW 2007, Australia; Mechanical Engineering Department, Prince Mohammad Bin Fahd University, Al Khobar 31952, Saudi Arabia
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8
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Photocatalytic Pretreatment of Commercial Lignin Using TiO2-ZnO Nanocomposite-Derived Advanced Oxidation Processes for Methane Production Synergy in Lab Scale Continuous Reactors. Catalysts 2021. [DOI: 10.3390/catal11010054] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The photocatalytic pretreatment of lignocellulosic biomass to oxidize lignin and increase biomass stability has gained attention during the last few years. Conventional pretreatment methods are limited by the fact that they are expensive, non-renewable and contaminate the anaerobic digestate later on. The present study was focused to develop a metal-derived photocatalyst that can work with visible electromagnetic spectra light and oxidize commercial lignin liquor. During this project the advanced photocatalytic oxidation of lignin was achieved by using a quartz cube tungsten T3 Halogen 100 W lamp with a laboratory manufactured TiO2-ZnO nanoparticle (nanocomposite) in a self-designed apparatus. The products of lignin oxidation were confirmed to be vanillic acid (9.71 ± 0.23 mg/L), ferrulic acid (7.34 ± 0.16 mg/L), benzoic acid (6.12 ± 0.17 mg/L) and p-coumaric acid (3.80 ± 0.13 mg/L). These all products corresponded to 85% of the lignin oxidation products that were detectable, which is significantly more than any previously reported lignin pretreatment with even more intensity. Furthermore, all the pretreatment samples were supplemented in the form of feedstock diluent in uniformly operating continuously stirred tank reactors (CSTRs). The results of pretreatment revealed 85% lignin oxidation and later on these products did not hinder the CSTR performance at any stage. Moreover, the synergistic effects of pretreated lignin diluent were seen that resulted in 39% significant increase in the methane yield of the CSTR with constant operation. Finally, the visible light and nanoparticles alone could not pretreat lignin and when used as diluent, halted and reduced the methane yield by 37% during 4th HRT.
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Khoshnevisan B, Duan N, Tsapekos P, Awasthi MK, Liu Z, Mohammadi A, Angelidaki I, Tsang DCW, Zhang Z, Pan J, Ma L, Aghbashlo M, Tabatabaei M, Liu H. A critical review on livestock manure biorefinery technologies: Sustainability, challenges, and future perspectives. RENEWABLE AND SUSTAINABLE ENERGY REVIEWS 2021; 135:110033. [DOI: 10.1016/j.rser.2020.110033] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/20/2023]
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10
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Hasan MJ, Hassan M, Chowdhury S. Waste measurement for biogas generation to fulfill the electric energy demand of IUBAT: a case study. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-2781-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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11
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Guo G, Shen C, Liu Q, Zhang S, Wang C, Chen L, Xu Q, Wang Y, Huo W. Fermentation quality and in vitro digestibility of first and second cut alfalfa (Medicago sativa L.) silages harvested at three stages of maturity. Anim Feed Sci Technol 2019. [DOI: 10.1016/j.anifeedsci.2019.114274] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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12
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Liu YN, Tong T, Zhang RR, Liu LM, Shi ML, Ma YC, Liu GQ. Interdependent nitric oxide and hydrogen peroxide independently regulate the coix seed oil-induced triterpene acid accumulation in Ganoderma lingzhi. Mycologia 2019; 111:529-540. [PMID: 31158070 DOI: 10.1080/00275514.2019.1615816] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Recent progress has been made in adding exogenous vegetable oils in culture media to promote bioactive metabolite production in several medicinal mushrooms, but the mechanism is still unclear. In this study, we found that the vegetable oil coix seed oil (CSO) could induce the biosynthesis of triterpene acids (TAs) and also significantly increase cytoplasmic nitric oxide (NO) and hydrogen peroxide (H2O2) concentrations in the mycelium of Ganoderma lingzhi. The change in TA biosynthesis caused by CSO could be reversed by adding NO scavenger or H2O2 scavenger, and adding NO scavenger or H2O2 scavenger resulted in the reduction of the cytoplasmic H2O2 or NO concentration under CSO treatment, respectively. Moreover, adding NO scavenger or H2O2 scavenger reversed TA biosynthesis, which could be rescued by H2O2 or NO donor, respectively. Taken together, our study indicated that both NO and H2O2 were involved in the regulation of TA biosynthesis, and CSO-activated NO and H2O2 were interdependent but independently regulated the TA biosynthesis under CSO treatment in G. lingzhi.
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Affiliation(s)
- Yong-Nan Liu
- a International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry & Technology , 498 Southern Shaoshan Road, Changsha 410004 , China.,b Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry & Technology , Changsha 410004 , China
| | - Tian Tong
- a International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry & Technology , 498 Southern Shaoshan Road, Changsha 410004 , China.,b Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry & Technology , Changsha 410004 , China
| | - Rong-Rong Zhang
- a International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry & Technology , 498 Southern Shaoshan Road, Changsha 410004 , China.,b Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry & Technology , Changsha 410004 , China
| | - Li-Ming Liu
- c School of Biotechnology, Jiangnan University , Wuxi 214122 , China
| | - Mu-Ling Shi
- a International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry & Technology , 498 Southern Shaoshan Road, Changsha 410004 , China.,b Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry & Technology , Changsha 410004 , China
| | - You-Chu Ma
- a International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry & Technology , 498 Southern Shaoshan Road, Changsha 410004 , China.,b Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry & Technology , Changsha 410004 , China
| | - Gao-Qiang Liu
- a International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology of Hunan Province, Central South University of Forestry & Technology , 498 Southern Shaoshan Road, Changsha 410004 , China.,b Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry & Technology , Changsha 410004 , China
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13
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Scheibe AS, Leal TW, Brandão HL, Valle JAB, de Souza SMAGU, de Souza AAU. Characterization of the liquid fractions from textile sludge pyrolysis and their application as defoamers. CAN J CHEM ENG 2018. [DOI: 10.1002/cjce.23219] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ana Silvia Scheibe
- Department of Chemical Engineering and Food Engineering; Federal University of Santa Catarina; Florianópolis SC 88040-900 Brazil
| | - Tarcísio Wolff Leal
- Department of Chemical Engineering and Food Engineering; Federal University of Santa Catarina; Florianópolis SC 88040-900 Brazil
| | - Heloísa Lima Brandão
- Department of Chemical Engineering and Food Engineering; Federal University of Santa Catarina; Florianópolis SC 88040-900 Brazil
| | - José Alexandre Borges Valle
- Department of Chemical Engineering and Food Engineering; Federal University of Santa Catarina; Florianópolis SC 88040-900 Brazil
| | | | - Antônio Augusto Ulson de Souza
- Department of Chemical Engineering and Food Engineering; Federal University of Santa Catarina; Florianópolis SC 88040-900 Brazil
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14
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Tsapekos P, Kougias P, Alvarado-Morales M, Kovalovszki A, Corbière M, Angelidaki I. Energy recovery from wastewater microalgae through anaerobic digestion process: Methane potential, continuous reactor operation and modelling aspects. Biochem Eng J 2018. [DOI: 10.1016/j.bej.2018.08.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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15
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Tang J, Qian Z, Wu H. Enhancing cordycepin production in liquid static cultivation of Cordyceps militaris by adding vegetable oils as the secondary carbon source. BIORESOURCE TECHNOLOGY 2018; 268:60-67. [PMID: 30071414 DOI: 10.1016/j.biortech.2018.07.128] [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: 05/23/2018] [Revised: 07/24/2018] [Accepted: 07/25/2018] [Indexed: 06/08/2023]
Abstract
This study evaluated different vegetable oils as the second carbon source in liquid static culture of Cordyceps militaris in terms of mycelial growth and cordycepin production. The maximum mycelial concentration and cordycepin production were observed under cottonseed oil and peanut oil induction, respectively. In the condition of adding 20 g/L of peanut oil at Day 0, the final concentration of cordycepin reached to the highest, about 5.29 g/L, which was about 3.17 times higher than that of the control. The qRT-PCR and enzyme activity analysis confirmed that addition of peanut oil up-regulated the expression of the genes encoding glucose-6-phosphate dehydrogenase and isocitrate lyase, as well as the genes in the cordycepin biosynthesis pathway, cns1 and cns2, during the cultivation in C. militaris.
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Affiliation(s)
- Jiapeng Tang
- Department of Biochemistry and Pharmacy, Institute of Nautical Medicine, Nantong University, Nantong 226001, PR China
| | - Zhenqing Qian
- Department of Biochemistry and Pharmacy, Institute of Nautical Medicine, Nantong University, Nantong 226001, PR China
| | - Hui Wu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, PR China; Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai 200237, PR China; Key Laboratory of Bio-based Material Engineering of China National Light Industry Council, 130 Meilong Road, Shanghai 200237, PR China.
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16
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Li R, Chang Y, Zhang Y, Chen X, Zhu Y. Role of a Tween 20-containing antifoaming agent in renaturation of foam-denatured pepsin during defoaming. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.07.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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17
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Moeller L, Bauer A, Zehnsdorf A, Lee MY, Müller RA. Anaerobic co-digestion of waste yeast biomass from citric acid production and waste frying fat. Eng Life Sci 2018; 18:425-433. [PMID: 32624923 DOI: 10.1002/elsc.201700176] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 03/21/2018] [Accepted: 04/04/2018] [Indexed: 11/11/2022] Open
Abstract
The application of spent yeast for biogas production has been studied only in the context of breweries so far. This study is focused on the anaerobic digestion of concentrated yeast biomass (CYB), being a by-product of citric acid biosynthesis. Two experimental set-ups were used in order to test CYB as a mono-substrate and co-substrate for closing the loop in accordance with the 'bioeconomy' approach. The results show that CYB allows for obtaining a high biogas yield, with a maximum of 1.45 m3 N/kgVS produced when CYB was used as a mono-substrate. The average methane concentration was 66 ± 4%. However, anaerobic digestion of CYB alone was difficult to perform because of a tendency for over-acidification, meaning that the maximum possible organic loading rate was 1 kg/(m3*d). Repeated clogging of tubes with coagulated biomass also disturbed continuous feeding. In contrast, the co-digestion of CYB with waste frying fat at a ratio of 1:20 showed stable operation during a 70-day fermentation period. The biogas yield using the substrate mixture was 1.42 m3/kgVS at an organic loading rate of 2 kg/(m3*d). The methane concentration reached 67 ± 4% and the acetate concentration did not exceed 30 mg/L during the entire fermentation.
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Affiliation(s)
- Lucie Moeller
- Centre for Environmental Biotechnology Helmholtz Centre for Environmental Research - UFZ Leipzig Germany
| | - Aline Bauer
- Centre for Environmental Biotechnology Helmholtz Centre for Environmental Research - UFZ Leipzig Germany
| | - Andreas Zehnsdorf
- Centre for Environmental Biotechnology Helmholtz Centre for Environmental Research - UFZ Leipzig Germany
| | - Mi-Yong Lee
- Centre for Environmental Biotechnology Helmholtz Centre for Environmental Research - UFZ Leipzig Germany
| | - Roland Arno Müller
- Centre for Environmental Biotechnology Helmholtz Centre for Environmental Research - UFZ Leipzig Germany
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18
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Fontana A, Campanaro S, Treu L, Kougias PG, Cappa F, Morelli L, Angelidaki I. Performance and genome-centric metagenomics of thermophilic single and two-stage anaerobic digesters treating cheese wastes. WATER RESEARCH 2018; 134:181-191. [PMID: 29427960 DOI: 10.1016/j.watres.2018.02.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 01/31/2018] [Accepted: 02/01/2018] [Indexed: 05/25/2023]
Abstract
The present research is the first comprehensive study regarding the thermophilic anaerobic degradation of cheese wastewater, which combines the evaluation of different reactor configurations (i.e. single and two-stage continuous stirred tank reactors) on the process efficiency and the in-depth characterization of the microbial community structure using genome-centric metagenomics. Both reactor configurations showed acidification problems under the tested organic loading rates (OLRs) of 3.6 and 2.4 g COD/L-reactor day and the hydraulic retention time (HRT) of 15 days. However, the two-stage design reached a methane yield equal to 95% of the theoretical value, in contrast with the single stage configuration, which reached a maximum of 33% of the theoretical methane yield. The metagenomic analysis identified 22 new population genomes and revealed that the microbial compositions between the two configurations were remarkably different, demonstrating a higher methanogenic biodiversity in the two-stage configuration. In fact, the acidogenic reactor of the serial configuration was almost solely composed by the lactose degrader Bifidobacterium crudilactis UC0001. The predictive functional analyses of the main population genomes highlighted specific metabolic pathways responsible for the AD process and the mechanisms of main intermediates production. Particularly, the acetate accumulation experienced by the single stage configuration was mainly correlated to the low abundant syntrophic acetate oxidizer Tepidanaerobacter acetatoxydans UC0018 and to the absence of aceticlastic methanogens.
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Affiliation(s)
- Alessandra Fontana
- Department for Sustainable Food Process - DiSTAS, Catholic University of the Sacred Heart, 29122 Piacenza, Italy; Department of Environmental Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | | | - Laura Treu
- Department of Environmental Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Panagiotis G Kougias
- Department of Environmental Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.
| | - Fabrizio Cappa
- Department for Sustainable Food Process - DiSTAS, Catholic University of the Sacred Heart, 29122 Piacenza, Italy
| | - Lorenzo Morelli
- Department for Sustainable Food Process - DiSTAS, Catholic University of the Sacred Heart, 29122 Piacenza, Italy
| | - Irini Angelidaki
- Department of Environmental Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
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19
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Li W, Zhang J, Xue Z, Wang J, Jiang L. Spontaneous and Directional Bubble Transport on Porous Copper Wires with Complex Shapes in Aqueous Media. ACS APPLIED MATERIALS & INTERFACES 2018; 10:3076-3081. [PMID: 29294280 DOI: 10.1021/acsami.7b15681] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Manipulation of gas bubble behaviors is crucial for gas bubble-related applications. Generally, the manipulation of gas bubble behaviors generally takes advantage of their buoyancy force. It is very difficult to control the transportation of gas bubbles in a specific direction. Several approaches have been developed to collect and transport bubbles in aqueous media; however, most reliable and effective manipulation of gas bubbles in aqueous media occurs on the interfaces with simple shapes (i.e., cylinder and cone shapes). Reliable strategies for spontaneous and directional transport of gas bubbles on interfaces with complex shapes remain enormously challenging. Herein, a type of 3D gradient porous network was constructed on copper wire interfaces, with rectangle, wave, and helix shapes. The superhydrophobic copper wires were immersed in water, and continuous and stable gas films then formed on the interfaces. With the assistance of the Laplace pressure gradient between two bubbles, gas bubbles (including microscopic gas bubbles) in the aqueous media were subsequently transported, continuously and directionally, on the copper wires with complex shapes. The small gas bubbles always moved to the larger ones.
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Affiliation(s)
- Wenjing Li
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, P. R. China
| | - Jingjing Zhang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, P. R. China
| | - Zhongxin Xue
- School of Chemistry and Materials Science, Ludong University , Yantai 264025, P. R. China
| | - Jingming Wang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, P. R. China
| | - Lei Jiang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, P. R. China
- Laboratory of Bio-inspired Smart Interface Science, Technical Institute of Physics and Chemistry, Chinese Academy of Science , Beijing 100190, P. R. China
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20
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Xu F, Li Y, Ge X, Yang L, Li Y. Anaerobic digestion of food waste - Challenges and opportunities. BIORESOURCE TECHNOLOGY 2018; 247:1047-1058. [PMID: 28965912 DOI: 10.1016/j.biortech.2017.09.020] [Citation(s) in RCA: 276] [Impact Index Per Article: 46.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 09/01/2017] [Accepted: 09/02/2017] [Indexed: 06/07/2023]
Abstract
The disposal of large amounts of food waste has caused significant environmental pollution and financial costs globally. Compared with traditional disposal methods (i.e., landfilling, incineration, and composting), anaerobic digestion (AD) is a promising technology for food waste management, but has not yet been fully applied due to a few technical and social challenges. This paper summarizes the quantity, composition, and methane potential of various types of food waste. Recent research on different strategies to enhance AD of food waste, including co-digestion, addition of micronutrients, control of foaming, and process design, is discussed. It is envisaged that AD of food waste could be combined with an existing AD facility or be integrated with the production of value-added products to reduce costs and increase revenue. Further understanding of the fundamental biological and physicochemical processes in AD is required to improve the technology.
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Affiliation(s)
- Fuqing Xu
- Department of Food, Agricultural and Biological Engineering, The Ohio State University, Ohio Agricultural Research and Development Center, 1680 Madison Avenue, Wooster, OH 44691, USA
| | - Yangyang Li
- Department of Food, Agricultural and Biological Engineering, The Ohio State University, Ohio Agricultural Research and Development Center, 1680 Madison Avenue, Wooster, OH 44691, USA; College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Xumeng Ge
- Department of Food, Agricultural and Biological Engineering, The Ohio State University, Ohio Agricultural Research and Development Center, 1680 Madison Avenue, Wooster, OH 44691, USA; Quasar Energy Group, 8600 E. Pleasant Valley Rd, Independence, OH 44131, USA
| | - Liangcheng Yang
- Department of Health Sciences, Illinois State University, USA
| | - Yebo Li
- Department of Food, Agricultural and Biological Engineering, The Ohio State University, Ohio Agricultural Research and Development Center, 1680 Madison Avenue, Wooster, OH 44691, USA; Quasar Energy Group, 8600 E. Pleasant Valley Rd, Independence, OH 44131, USA.
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21
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Alvarado-Morales M, Tsapekos P, Awais M, Gulfraz M, Angelidaki I. TiO 2 /UV based photocatalytic pretreatment of wheat straw for biogas production. Anaerobe 2017; 46:155-161. [DOI: 10.1016/j.anaerobe.2016.11.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 11/15/2016] [Accepted: 11/16/2016] [Indexed: 11/16/2022]
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22
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Xue X, Yu C, Wang J, Jiang L. Superhydrophobic Cones for Continuous Collection and Directional Transportation of CO 2 Microbubbles in CO 2 Supersaturated Solutions. ACS NANO 2016; 10:10887-10893. [PMID: 28024340 DOI: 10.1021/acsnano.6b05371] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Microbubbles are tiny bubbles with diameters below 50 μm. Because of their minute buoyant force, the microbubbles stagnate in aqueous media for a long time, and they sometimes cause serious damage. Most traditional methods chosen for elimination of gas bubbles utilize buoyancy forces including chemical methods and physical methods, and they only have a minor effect on microbubbles. Several approaches have been developed to collect and transport microbubbles in aqueous media. However, the realization of innovative strategies to directly collect and transport microbubbles in aqueous media remains a big challenge. In nature, both spider silk and cactus spines take advantage of their conical-shaped surface to yield the gradient of Laplace pressure and surface free energy for collecting fog droplets from the environment. Inspired by this, we introduce here the gradient of Laplace pressure and surface free energy to the interface of superhydrophobic copper cones (SCCs), which can continuously collect and directionally transport CO2 microbubbles (from tip side to base side) in CO2-supersaturated solution. A gas layer was formed when the microbubbles encounter the SCCs. This offers a channel for microbubble directional transportation. The efficiency of microbubble transport is significantly affected by the apex angle of SCCs and the carbon dioxide concentration. The former provides different gradients of Laplace pressure as the driving force. The latter represents the capacity, which offers the quantity of CO2 microbubbles for collection and transportation. We believe that this approach provides a simple and valid way to remove microbubbles.
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Affiliation(s)
- Xiuzhan Xue
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, China
| | | | - Jingming Wang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, China
| | - Lei Jiang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, China
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23
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Chiu SLH, Lo IMC. Reviewing the anaerobic digestion and co-digestion process of food waste from the perspectives on biogas production performance and environmental impacts. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:24435-24450. [PMID: 27380183 DOI: 10.1007/s11356-016-7159-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Accepted: 06/28/2016] [Indexed: 06/06/2023]
Abstract
In this paper, factors that affect biogas production in the anaerobic digestion (AD) and anaerobic co-digestion (coAD) processes of food waste are reviewed with the aim to improve biogas production performance. These factors include the composition of substrates in food waste coAD as well as pre-treatment methods and anaerobic reactor system designs in both food waste AD and coAD. Due to the characteristics of the substrates used, the biogas production performance varies as different effects are exhibited on nutrient balance, inhibitory substance dilution, and trace metal element supplement. Various types of pre-treatment methods such as mechanical, chemical, thermal, and biological methods are discussed to improve the rate-limiting hydrolytic step in the digestion processes. The operation parameters of a reactor system are also reviewed with consideration of the characteristics of the substrates. Since the environmental awareness and concerns for waste management systems have been increasing, this paper also addresses possible environmental impacts of AD and coAD in food waste treatment and recommends feasible methods to reduce the impacts. In addition, uncertainties in the life cycle assessment (LCA) studies are also discussed.
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Affiliation(s)
- Sam L H Chiu
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Irene M C Lo
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
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24
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Sivagurunathan P, Anburajan P, Kumar G, Bakonyi P, Nemestóthy N, Bélafi-Bakó K, Kim SH. Effects of anti-foaming agents on biohydrogen production. BIORESOURCE TECHNOLOGY 2016; 213:121-128. [PMID: 26995320 DOI: 10.1016/j.biortech.2016.02.121] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 02/25/2016] [Accepted: 02/26/2016] [Indexed: 06/05/2023]
Abstract
The effects of antifoaming agents on fermentative hydrogen production using galactose in batch and continuous operations were investigated. Batch hydrogen production assays with LS-303 (dimethylpolysiloxane), LG-109 (polyalkylene), LG-126 (polyoxyethylenealkylene), and LG-299 (polyether) showed that the doses and types of antifoaming agents played a significant role in hydrogen production. During batch tests, LS-303 at 100μL/L resulted in the maximum hydrogen production rate (HPR) and hydrogen yield (HY) of 2.5L/L-d and 1.08mol H2/mol galactoseadded, respectively. The following continuously stirred tank reactor operated at 12h HRT with LS-303 at 100μL/L showed a stable HPR and HY of 4.9L/L-d and 1.17mol H2/mol galactoseadded, respectively, which were higher than those found for the control reactor. Microbial community analysis supported the alterations in H2 generation under different operating conditions and the stimulatory impact of certain antifoaming chemicals on H2 production was demonstrated.
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Affiliation(s)
- Periyasamy Sivagurunathan
- Department of Environmental Engineering, Daegu University, Gyeongsan, Gyeongbuk 712-714, Republic of Korea; Center for Materials Cycles and Waste Management Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - Parthiban Anburajan
- Department of Civil Engineering, Daegu University, Gyeongsan, Gyeongbuk 712-714, Republic of Korea
| | - Gopalakrishnan Kumar
- Center for Materials Cycles and Waste Management Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - Péter Bakonyi
- Research Institute on Bioengineering, Membrane Technology and Energetics, University of Pannonia, Egyetem ut 10, 8200 Veszprém, Hungary
| | - Nándor Nemestóthy
- Research Institute on Bioengineering, Membrane Technology and Energetics, University of Pannonia, Egyetem ut 10, 8200 Veszprém, Hungary
| | - Katalin Bélafi-Bakó
- Research Institute on Bioengineering, Membrane Technology and Energetics, University of Pannonia, Egyetem ut 10, 8200 Veszprém, Hungary
| | - Sang-Hyoun Kim
- Department of Environmental Engineering, Daegu University, Gyeongsan, Gyeongbuk 712-714, Republic of Korea.
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25
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Moeller L, Krieg F, Zehnsdorf A, Müller RA. How to Avoid Foam Formation in Biogas Plants by Coarse Grain Anaerobic Digestion. Chem Eng Technol 2016. [DOI: 10.1002/ceat.201500300] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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26
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Bassani I, Kougias PG, Treu L, Angelidaki I. Biogas Upgrading via Hydrogenotrophic Methanogenesis in Two-Stage Continuous Stirred Tank Reactors at Mesophilic and Thermophilic Conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:12585-93. [PMID: 26390125 DOI: 10.1021/acs.est.5b03451] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
This study proposes an innovative setup composed by two stage reactors to achieve biogas upgrading coupling the CO2 in the biogas with external H2 and subsequent conversion into CH4 by hydrogenotrophic methanogenesis. In this configuration, the biogas produced in the first reactor was transferred to the second one, where H2 was injected. This configuration was tested at both mesophilic and thermophilic conditions. After H2 addition, the produced biogas was upgraded to average CH4 content of 89% in the mesophilic reactor and 85% in the thermophilic. At thermophilic conditions, a higher efficiency of CH4 production and CO2 conversion was recorded. The consequent increase of pH did not inhibit the process indicating adaptation of microorganisms to higher pH levels. The effects of H2 on the microbial community were studied using high-throughput Illumina random sequences and full-length 16S rRNA genes extracted from the total sequences. The relative abundance of archaeal community markedly increased upon H2 addition with Methanoculleus as dominant genus. The increase of hydrogenotrophic methanogens and syntrophic Desulfovibrio and the decrease of aceticlastic methanogens indicate a H2-mediated shift toward the hydrogenotrophic pathway enhancing biogas upgrading. Moreover, Thermoanaerobacteraceae were likely involved in syntrophic acetate oxidation with hydrogenotrophic methanogens in absence of aceticlastic methanogenesis.
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Affiliation(s)
- Ilaria Bassani
- Department of Environmental Engineering, Technical University of Denmark , Kgs. Lyngby, Denmark
| | - Panagiotis G Kougias
- Department of Environmental Engineering, Technical University of Denmark , Kgs. Lyngby, Denmark
| | - Laura Treu
- Department of Environmental Engineering, Technical University of Denmark , Kgs. Lyngby, Denmark
| | - Irini Angelidaki
- Department of Environmental Engineering, Technical University of Denmark , Kgs. Lyngby, Denmark
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27
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Kougias PG, Boe K, Einarsdottir ES, Angelidaki I. Counteracting foaming caused by lipids or proteins in biogas reactors using rapeseed oil or oleic acid as antifoaming agents. WATER RESEARCH 2015; 79:119-27. [PMID: 25978353 DOI: 10.1016/j.watres.2015.04.034] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 04/13/2015] [Accepted: 04/20/2015] [Indexed: 05/10/2023]
Abstract
Foaming is one of the major operational problems in biogas plants, and dealing with foaming incidents is still based on empirical practices. Various types of antifoams are used arbitrarily to combat foaming in biogas plants, but without any scientific support this action can lead to serious deterioration of the methanogenic process. Many commercial antifoams are derivatives of fatty acids or oils. However, it is well known that lipids can induce foaming in manure based biogas plants. This study aimed to elucidate the effect of rapeseed oil and oleic acid on foam reduction and process performance in biogas reactors fed with protein or lipid rich substrates. The results showed that both antifoams efficiently suppressed foaming. Moreover rapeseed oil resulted in stimulation of the biogas production. Finally, it was reckoned that the chemical structure of lipids, and more specifically their carboxylic ends, is responsible for their foam promoting or foam counteracting behaviour. Thus, it was concluded that the fatty acids and oils could suppress foaming, while salt of fatty acids could generate foam.
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Affiliation(s)
- P G Kougias
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby, DK-2800, Denmark
| | - K Boe
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby, DK-2800, Denmark
| | - E S Einarsdottir
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby, DK-2800, Denmark
| | - I Angelidaki
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby, DK-2800, Denmark.
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28
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Moeller L, Eismann F, Wißmann D, Nägele HJ, Zielonka S, Müller RA, Zehnsdorf A. Innovative test method for the estimation of the foaming tendency of substrates for biogas plants. WASTE MANAGEMENT (NEW YORK, N.Y.) 2015; 41:39-49. [PMID: 25857422 DOI: 10.1016/j.wasman.2015.03.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 03/12/2015] [Accepted: 03/24/2015] [Indexed: 06/04/2023]
Abstract
Excessive foaming in anaerobic digestion occurs at many biogas plants and can cause problems including plugged gas pipes. Unfortunately, the majority of biogas plant operators are unable to identify the causes of foaming in their biogas reactor. The occurrence of foaming is often related to the chemical composition of substrates fed to the reactor. The consistency of the digestate itself is also a crucial part of the foam formation process. Thus, no specific recommendations concerning substrates can be given in order to prevent foam formation in biogas plants. The safest way to avoid foaming is to test the foaming tendency of substrates on-site. A possible solution is offered by an innovative foaming test. With the help of this tool, biogas plant operators can evaluate the foaming disposition of new substrates prior to use in order to adjust the composition of substrate mixes.
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Affiliation(s)
- Lucie Moeller
- UFZ - Helmholtz Centre for Environmental Research, Centre for Environmental Biotechnology, Permoserstrasse 15, 04318 Leipzig, Germany.
| | - Frank Eismann
- Eismann & Stöbe GbR, GeoPark, Geb. A12, Bautzner Strasse 67, 04347 Leipzig, Germany.
| | - Daniel Wißmann
- University of Hohenheim, State Institute of Agricultural Engineering and Bioenergy (LA740), Garbenstrasse 9, 70599 Stuttgart, Germany.
| | - Hans-Joachim Nägele
- University of Hohenheim, State Institute of Agricultural Engineering and Bioenergy (LA740), Garbenstrasse 9, 70599 Stuttgart, Germany.
| | - Simon Zielonka
- University of Hohenheim, State Institute of Agricultural Engineering and Bioenergy (LA740), Garbenstrasse 9, 70599 Stuttgart, Germany.
| | - Roland A Müller
- UFZ - Helmholtz Centre for Environmental Research, Centre for Environmental Biotechnology, Permoserstrasse 15, 04318 Leipzig, Germany.
| | - Andreas Zehnsdorf
- UFZ - Helmholtz Centre for Environmental Research, Centre for Environmental Biotechnology, Permoserstrasse 15, 04318 Leipzig, Germany.
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29
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Ma R, Wang J, Yang Z, Liu M, Zhang J, Jiang L. Bioinspired gas bubble spontaneous and directional transportation effects in an aqueous medium. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:2384-9. [PMID: 25688855 DOI: 10.1002/adma.201405087] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 01/16/2015] [Indexed: 05/26/2023]
Abstract
A series of well-ordered, 3D gradient porous interconnected network surfaces composed of micro-nano hierarchical geometries is constructed on a copper wire. A continuous gas film can be trapped around its interface in an aqueous medium acting as an effective channel for gas transportation. Driving by the difference of the Laplace pressure, gas bubbles can be transported spontaneously and directionally.
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Affiliation(s)
- Rui Ma
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing, 100191, P.R. China
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30
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Tsapekos P, Kougias PG, Angelidaki I. Biogas production from ensiled meadow grass; effect of mechanical pretreatments and rapid determination of substrate biodegradability via physicochemical methods. BIORESOURCE TECHNOLOGY 2015; 182:329-335. [PMID: 25710572 DOI: 10.1016/j.biortech.2015.02.025] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 02/03/2015] [Accepted: 02/07/2015] [Indexed: 06/04/2023]
Abstract
As the biogas sector is rapidly expanding, there is an increasing need in finding new alternative feedstock to biogas plants. Meadow grass can be a suitable co-substrate and if ensiled it can be supplied to biogas plants continuously throughout the year. Nevertheless, this substrate is quite recalcitrant and therefore efficient pretreatment is needed to permit easy access of microbes to the degradable components. In this study, different mechanical pretreatment methods were applied on ensiled meadow grass to investigate their effect on biomass biodegradability. All the tested pretreatments increased the methane productivity and the increase ranged from 8% to 25%. The best mechanical pretreatment was the usage of two coarse mesh grating plates. Additionally, simple analytical methods were conducted to investigate the possibility of rapidly determining the methane yield of meadow grass. Among the methods, electrical conductivity test showed the most promising calibration statistics (R(2)=0.68).
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Affiliation(s)
- P Tsapekos
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark
| | - P G Kougias
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark
| | - I Angelidaki
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark.
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31
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Effects of feedstock carbon to nitrogen ratio and organic loading on foaming potential in mesophilic food waste anaerobic digestion. Appl Microbiol Biotechnol 2015; 99:4509-20. [DOI: 10.1007/s00253-015-6486-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 02/12/2015] [Accepted: 02/15/2015] [Indexed: 11/26/2022]
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32
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Li D, Liu S, Mi L, Li Z, Yuan Y, Yan Z, Liu X. Effects of feedstock ratio and organic loading rate on the anaerobic mesophilic co-digestion of rice straw and pig manure. BIORESOURCE TECHNOLOGY 2015; 187:120-127. [PMID: 25846181 DOI: 10.1016/j.biortech.2015.03.040] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 03/06/2015] [Accepted: 03/07/2015] [Indexed: 06/04/2023]
Abstract
In order to investigate the effects of feedstock ratio and organic loading rate (OLR) on the anaerobic mesophilic co-digestion of rice straw (RS) and pig manure (PM), batch bottle tests (2.5L) were carried out at volatile solid (VS) ratios of 0:1, 1:2, 1:1, 2:1, and 1:0 (RS/PM), and continuous bench experiments (40L) were carried out at OLRs of 3.0, 3.6, 4.2, 4.8, 6.0, 8.0, and 12.0kg VS/(m(3)d) with optimal VS ratio. The results showed that the optimal ratio was 1:1 in terms of biogas yield. Stable biogas production with an average specific biogas production of 413L/kg VS was obtained at an OLR of 3-8kg VS/(m(3)d). Anaerobic co-digestion was severely inhibited by the accumulation of volatile fatty acids when the OLR was 12kg VS/(m(3)d). Further, light and serious foaming were observed at OLR of 8 and 12kg VS/(m(3)d), respectively.
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Affiliation(s)
- Dong Li
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China
| | - Shengchu Liu
- Chengdu Zhongke Energy & Environmental Protection Co. Ltd, Chengdu 610041, China
| | - Li Mi
- Chengdu Zhongke Energy & Environmental Protection Co. Ltd, Chengdu 610041, China
| | - Zhidong Li
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China
| | - Yuexiang Yuan
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China
| | - Zhiying Yan
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China
| | - Xiaofeng Liu
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China.
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33
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Optimization of cultivation medium and fermentation parameters for lincomycin production by Streptomyces lincolnensis. BIOTECHNOL BIOPROC E 2015. [DOI: 10.1007/s12257-014-0280-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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34
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Li D, Liu S, Mi L, Li Z, Yuan Y, Yan Z, Liu X. Effects of feedstock ratio and organic loading rate on the anaerobic mesophilic co-digestion of rice straw and cow manure. BIORESOURCE TECHNOLOGY 2015; 189:319-326. [PMID: 25909453 DOI: 10.1016/j.biortech.2015.04.033] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 04/09/2015] [Accepted: 04/11/2015] [Indexed: 05/16/2023]
Abstract
In order to investigate the effects of feedstock ratio and organic loading rate (OLR) on the anaerobic mesophilic co-digestion of rice straw (RS) and cow manure (CM), batch tests (2.5L) were carried out at volatile solid (VS) ratios of 0:1, 1:2, 1:1, 2:1, and 1:0 (RS/CM), and continuous bench experiments (40 L) were carried out at OLRs of 3.0, 3.6, 4.2, 4.8, 6.0, 8.0, and 12.0 kg VS/(m(3) d) with optimal VS ratio. The optimal VS ratio was found to be 1:1. Stable and efficient co-digestion with average specific biogas production of 383.5L/kg VS and volumetric biogas production rate of 2.30 m(3)/(m(3) d) was obtained at an OLR of 6 kg VS/(m(3) d). Anaerobic co-digestion was severely inhibited by the accumulation of volatile fatty acids instead of ammonia when the OLR was 12 kg VS/(m(3) d). Further, significant foaming was observed at OLR ⩾ 8 kg VS/(m(3) d).
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Affiliation(s)
- Dong Li
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China
| | - Shengchu Liu
- Chengdu Zhongke Energy & Environmental Protection CO. LTD, Chengdu 610041, China
| | - Li Mi
- Chengdu Zhongke Energy & Environmental Protection CO. LTD, Chengdu 610041, China
| | - Zhidong Li
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China
| | - Yuexiang Yuan
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China
| | - Zhiying Yan
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China
| | - Xiaofeng Liu
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China.
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Kougias PG, De Francisci D, Treu L, Campanaro S, Angelidaki I. Microbial analysis in biogas reactors suffering by foaming incidents. BIORESOURCE TECHNOLOGY 2014; 167:24-32. [PMID: 24968108 DOI: 10.1016/j.biortech.2014.05.080] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 05/19/2014] [Accepted: 05/21/2014] [Indexed: 05/22/2023]
Abstract
Foam formation can lead to total failure of digestion process in biogas plants. In the present study, possible correlation between foaming and the presence of specific microorganisms in biogas reactors was elucidated. The microbial ecology of continuous fed digesters overloaded with proteins, lipids and carbohydrates before and after foaming incidents was characterized using 16S rRNA gene sequencing. Moreover, the microbial diversity between the liquid and foaming layer was assessed. A number of genera that are known to produce biosurfactants, contain mycolic acid in their cell wall, or decrease the surface tension of the media, increased their relative abundance after foam formation. Finally, a microorganism similar to widely known foaming bacteria (Nocardia and Desulfotomaculum) was found to increase its relative abundance in all reactors once foam was observed, regardless of the used substrate. These findings suggest that foaming and specific microorganisms might have direct association which requires to be further investigated.
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Affiliation(s)
- Panagiotis G Kougias
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark
| | - Davide De Francisci
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark
| | - Laura Treu
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark
| | - Stefano Campanaro
- Department of Biology, University of Padua, Via U. Bassi 58/b, 35131 Padova, Italy
| | - Irini Angelidaki
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark.
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