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Iltchenco J, Smiderle MD, Gaio J, Magrini FE, Paesi S. Metataxonomic Studies to Evaluate the Beneficial Effect of Enzymatic Pretreatment on the Anaerobic Digestion of Waste Generated in Turkey Farming. Curr Microbiol 2024; 81:255. [PMID: 38955830 DOI: 10.1007/s00284-024-03787-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 06/24/2024] [Indexed: 07/04/2024]
Abstract
Turkey litter waste is lignocellulosic and keratinous, requiring prior enzymatic treatment to facilitate fiber hydrolysis and utilization by microorganisms in anaerobic digestion (AD) process. The understanding of the performance of microorganisms in AD can be facilitated through molecular biology and bioinformatics tools. This study aimed to determine the taxonomic profile and functional prediction of microbial communities in the AD of turkey litter waste subjected to enzymatic pretreatment and correlate it with operational parameters. The tests involved the use of turkey litter (T) at 25 g L-1 of volatile solids, a granular inoculum (S) (10% m/v), and the addition of cellulase (C), and pectinase (P) enzymes at four concentrations. The use of enzymes increased methane production by 19% (turkey litter, inoculum, and cellulase-TSC4) and 15% (turkey litter, inoculum, and enzymatic pectinase-TSP4) compared to the control (turkey litter and inoculum-TS), being more effective in TSC4 (667.52 mLCH4), where there was consumption of acetic, butyric, and propionic acids. The pectinase assay (TSP4) showed a methane production of 648 mLCH4 and there was the accumulation of metabolites. Cellulolytic microorganisms Bacteroides, Ruminofilibacter, Lachnospiraceae, Ruminococcaceae, and Methanosaeta were favored in TSC4. In TSP4, the predominant genus was Macellibacteroides and Methanosarcina, and genes involved in methylotrophic methanogenesis were also found (mtaB, mtmB, and mtbB). Enzymes involved in hydrogenotrophic methanogenesis were identified in both assays (TSC4 and TSP4). Molecular tools helped to understand the metabolic routes involved in AD with enzymatic treatment, allowing the elaboration of strategies to improve the sustainable degradation of turkey litter waste.
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Affiliation(s)
- Janaina Iltchenco
- Molecular Diagnostic Laboratory (LDIM), University of Caxias Do Sul, Caxias do Sul, Rio Grande do Sul, 95070-560, Brazil
| | - Mariana Dalsoto Smiderle
- Molecular Diagnostic Laboratory (LDIM), University of Caxias Do Sul, Caxias do Sul, Rio Grande do Sul, 95070-560, Brazil
| | - Juliano Gaio
- Molecular Diagnostic Laboratory (LDIM), University of Caxias Do Sul, Caxias do Sul, Rio Grande do Sul, 95070-560, Brazil
| | - Flaviane Eva Magrini
- Molecular Diagnostic Laboratory (LDIM), University of Caxias Do Sul, Caxias do Sul, Rio Grande do Sul, 95070-560, Brazil
| | - Suelen Paesi
- Molecular Diagnostic Laboratory (LDIM), University of Caxias Do Sul, Caxias do Sul, Rio Grande do Sul, 95070-560, Brazil.
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Zhuravleva EA, Shekhurdina SV, Laikova A, Kotova IB, Loiko NG, Popova NM, Kriukov E, Kovalev AA, Kovalev DA, Katraeva IV, Vivekanand V, Awasthi MK, Litti YV. Enhanced thermophilic high-solids anaerobic digestion of organic fraction of municipal solid waste with spatial separation from conductive materials in a single reactor volume. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 363:121434. [PMID: 38861886 DOI: 10.1016/j.jenvman.2024.121434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 05/22/2024] [Accepted: 06/07/2024] [Indexed: 06/13/2024]
Abstract
Despite benefits such as lower water and working volume requirements, thermophilic high solids anaerobic digestion (THSAD) often fails due to the rapid build-up of volatile fatty acids (VFAs) and the associated drop in pH. Use of conductive materials (CM) can promote THSAD through stimulation of direct interspecies electron transfer (DIET), while the need for their constant dosing due to poor separation from effluent impairs economic feasibility. This study used an approach of spatially separating magnetite and granular activated carbon (GAC) from the organic fraction of municipal solid waste (OFMSW) in a single reactor for THSAD. GAC and magnetite addition could both mitigate the severe inhibition of methanogenesis after VFAs build-up to ∼28-30 g/L, while negligible methane production was observed in the control group. The highest methane yield (286 mL CH4/g volatile solids (VS)) was achieved in magnetite-added reactors, while the highest maximum CH4 production rates (26.38 mL CH4/g VS/d) and lowest lag-phase (2.83 days) were obtained in GAC-added reactors. The enrichment of GAC and magnetite biofilms with various syntrophic and potentially electroactive microbial groups (Ruminiclostridium 1, Clostridia MBA03, Defluviitoga, Lentimicrobiaceae) in different relative abundances indicates the existence of specific preferences of these groups for the nature of CM. According to predicted basic metabolic functions, CM can enhance cellular processes and signals, lipid transport and metabolism, and methane metabolism, resulting in improved methane production. Rearrangement of metabolic pathways, formation of pili-like structures, enrichment of biofilms with electroactive groups and a significant improvement in THSAD performance was attributed to the enhancement of the DIET pathway. Promising results obtained in this work due to the spatial separation of the bulk OFMSW and CM can be useful for modeling larger-scale THSAD systems with better recovery of CM and cost-effectiveness.
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Affiliation(s)
- Elena A Zhuravleva
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7, bld. 2 117312 Moscow, Russia.
| | - Svetlana V Shekhurdina
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7, bld. 2 117312 Moscow, Russia.
| | - Aleksandra Laikova
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7, bld. 2 117312 Moscow, Russia.
| | - Irina B Kotova
- Department of Biology, Lomonosov Moscow State University, Vorob'jovy gory, 119899 Moscow, Russia.
| | - Natalia G Loiko
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7, bld. 2 117312 Moscow, Russia.
| | - Nadezhda M Popova
- Frumkin Institute of Physical Chemistry and Electrochemistry RAS, 31, bld.4, Leninsky prospect, 119071 Moscow, Russia.
| | - Emil Kriukov
- Sechenov First Moscow State Medical University, 8-2 Trubetskaya str. 119435 Moscow, Russia.
| | - Andrey A Kovalev
- Federal Scientific Agroengineering Center VIM, 1st Institutsky proezd, 5,109428 Moscow, Russia.
| | - Dmitriy A Kovalev
- Federal Scientific Agroengineering Center VIM, 1st Institutsky proezd, 5,109428 Moscow, Russia.
| | - Inna V Katraeva
- Department of Water Supply, Sanitation, Engineering Ecology and Chemistry, Nizhny Novgorod State University of Architecture and Civil Engineering, Nizhny Novgorod, 603000, Russia.
| | - Vivekanand Vivekanand
- Centre for Energy and Environment, Malaviya National Institute of Technology Jaipur, Jaipur, 302017, Rajasthan, India.
| | - Mukesh Kumar Awasthi
- College of Natural Resources and Environmental, Northwest A&F University, Taicheng Road 3#, Yangling, Shaanxi, 71200, China.
| | - Yuriy V Litti
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7, bld. 2 117312 Moscow, Russia.
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Zhou H, Guo S, Hui C, Zhu M, Shen D, Fang C, Long Y, Hu L. Sulfate reduction behavior in response to landfill dynamic pressure changes. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 351:119784. [PMID: 38081091 DOI: 10.1016/j.jenvman.2023.119784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 11/24/2023] [Accepted: 12/03/2023] [Indexed: 01/14/2024]
Abstract
During the long-term stabilization process of landfills, the pressure field undergoes constant changes. This study constructed dynamic pressure changes scenarios of high-pressure differentials (0.6 MPa) and low-pressure differentials (0.2 MPa) in the landfill pressure field at 25 °C and 50 °C, and investigated the sulfate reduction behavior in response to landfill dynamic pressure changes. The results showed that the pressurization or depressurization of high-pressure differentials caused more significant differences in sulfate reduction behavior than that of low-pressure differentials. The lowest hydrogen sulfide (H2S) release peak concentration under pressurization was only 29.67% of that under initial pressure condition; under depressurization, the highest peak concentration of H2S was up to 21,828 mg m-3, posing a serious risk of H2S pollution. Microbial community and correlation analysis showed that pressure had a negative impact on the sulfate-reducing bacteria (SRB) community, and the SRB community adjusted its structure to adapt to pressure changes. Specific SRBs were further enriched with pressure changes. Differential H2S release behavior under pressure changes in the 25 °C pressure environments were mediated by Desulfofarcimen (ASV343) and Desulfosporosinus (ASV1336), while Candidatus Desulforudis (ASV24) and Desulfohalotomaculum (ASV94) played a key role at 50 °C. This study is helpful in the formulation of control strategies for the source of odor pollution in landfills.
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Affiliation(s)
- Haomin Zhou
- Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Engineering Research Center of Non-ferrous Metal Waste Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Shuli Guo
- Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Engineering Research Center of Non-ferrous Metal Waste Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Cai Hui
- Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Engineering Research Center of Non-ferrous Metal Waste Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Min Zhu
- Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Engineering Research Center of Non-ferrous Metal Waste Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Dongsheng Shen
- Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Engineering Research Center of Non-ferrous Metal Waste Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Chengran Fang
- College of Civil Engineering, Zhejiang University of Technology, Hangzhou, 310023, China
| | - Yuyang Long
- Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Engineering Research Center of Non-ferrous Metal Waste Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China.
| | - Lifang Hu
- College of Quality and Safety Engineering, Institution of Industrial Carbon Metrology, China Jiliang University, Hangzhou, 310018, China.
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Efremenko E, Stepanov N, Senko O, Lyagin I, Maslova O, Aslanli A. Artificial Humic Substances as Biomimetics of Natural Analogues: Production, Characteristics and Preferences Regarding Their Use. Biomimetics (Basel) 2023; 8:613. [PMID: 38132553 PMCID: PMC10742262 DOI: 10.3390/biomimetics8080613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 12/12/2023] [Accepted: 12/13/2023] [Indexed: 12/23/2023] Open
Abstract
Various processes designed for the humification (HF) of animal husbandry wastes, primarily bird droppings, reduce their volumes, solve environmental problems, and make it possible to obtain products with artificially formed humic substances (HSs) as analogues of natural HSs, usually extracted from fossil sources (coal and peat). This review studies the main characteristics of various biological and physicochemical methods of the HF of animal wastes (composting, anaerobic digestion, pyrolysis, hydrothermal carbonation, acid or alkaline hydrolysis, and subcritical water extraction). A comparative analysis of the HF rates and HS yields in these processes, the characteristics of the resulting artificial HSs (humification index, polymerization index, degree of aromaticity, etc.) was carried out. The main factors (additives, process conditions, waste pretreatment, etc.) that can increase the efficiency of HF and affect the properties of HSs are highlighted. Based on the results of chemical composition analysis, the main trends and preferences with regard to the use of HF products as complex biomimetics are discussed.
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Affiliation(s)
- Elena Efremenko
- Faculty of Chemistry, Lomonosov Moscow State University, Lenin Hills 1/3, Moscow 119991, Russia; (N.S.); (O.S.)
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Wang G, Fu P, Zhang B, Zhang J, Huang Q, Yao G, Li Q, Dzakpasu M, Zhang J, Li YY, Chen R. Biochar facilitates methanogens evolution by enhancing extracellular electron transfer to boost anaerobic digestion of swine manure under ammonia stress. BIORESOURCE TECHNOLOGY 2023; 388:129773. [PMID: 37722547 DOI: 10.1016/j.biortech.2023.129773] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 08/24/2023] [Accepted: 09/11/2023] [Indexed: 09/20/2023]
Abstract
This study explored the mechanisms by which biochar mitigates ammonia inhibition in anaerobic digestion (AD) of swine manure. Findings show 2-8 g/L exogenous ammonia dosages gradually inhibited AD, leading to decreases in the efficiencies of hydrolysis, acidogenesis and methanogenesis by 3.4-70.8%, 6.0-82.0%, and 4.9-93.8%, respectively. However, biochar addition mitigated this inhibition and facilitated methane production. Biochar enhanced microbial activities related to electron transport and extracellular electron transfer. Moreover, biochar primarily enriched Methanosarcina, which, consequently, upregulated the genes encoding formylmethanofuran dehydrogenase and methenyltetrahydromethanopterin cyclohydrolase for the CO2-reducing methanogenesis pathway by 26.9-40.8%. It is believed that biochar mediated direct interspecies electron transfer between syntrophic partners, thereby enhancing methane production under ammonia stress. Interestingly, biochar removal did not significantly impact the AD performance of the acclimated microbial community. This indicated the pivotal role of biochar in triggering methanogen evolution to mitigate ammonia stress rather than the indispensable function after the enrichment of ammonia-resistance methanogen.
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Affiliation(s)
- Gaojun Wang
- Key Lab of Environmental Engineering (Shaanxi Province), School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China; International S&T Cooperation Center for Urban Alternative Water Resources Development, Key Laboratory of Northwest Water Resource, Environment and Ecology (Ministry of Education), Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China
| | - Peng Fu
- Key Lab of Environmental Engineering (Shaanxi Province), School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China
| | - Bo Zhang
- Key Lab of Environmental Engineering (Shaanxi Province), School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China
| | - Ji Zhang
- Key Lab of Environmental Engineering (Shaanxi Province), School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China
| | - Qiuyi Huang
- Key Lab of Environmental Engineering (Shaanxi Province), School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China
| | - Gaofei Yao
- Key Lab of Environmental Engineering (Shaanxi Province), School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China
| | - Qian Li
- Key Lab of Environmental Engineering (Shaanxi Province), School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China; International S&T Cooperation Center for Urban Alternative Water Resources Development, Key Laboratory of Northwest Water Resource, Environment and Ecology (Ministry of Education), Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China; Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Mawuli Dzakpasu
- Key Lab of Environmental Engineering (Shaanxi Province), School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China; International S&T Cooperation Center for Urban Alternative Water Resources Development, Key Laboratory of Northwest Water Resource, Environment and Ecology (Ministry of Education), Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China
| | - Jianfeng Zhang
- Key Lab of Environmental Engineering (Shaanxi Province), School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Rong Chen
- Key Lab of Environmental Engineering (Shaanxi Province), School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China; International S&T Cooperation Center for Urban Alternative Water Resources Development, Key Laboratory of Northwest Water Resource, Environment and Ecology (Ministry of Education), Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China.
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6
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Orrantia M, Meza-Escalante ER, Burboa-Charis VA, García-Reyes RB, Atilano-Camino MM, Serrano-Palacios D, Leyva LA, Del Angel YA, Alvarez LH. Granular activated carbon enhances the anaerobic digestion of solid and liquid fractions of swine effluent at different mesophilic temperatures. Anaerobe 2023; 83:102782. [PMID: 37717850 DOI: 10.1016/j.anaerobe.2023.102782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 08/14/2023] [Accepted: 09/05/2023] [Indexed: 09/19/2023]
Abstract
OBJECTIVES This study evaluated the effect of particle size and dosage of granular activated carbon (GAC) on methane production from the anaerobic digestion of raw effluent (RE) of swine wastewater, and the solid (SF) and liquid (LF) fractions. The effect of temperature using the selected size and dosage of GAC was also evaluated. METHODS 60 mL of swine wastewater were inoculated with anaerobic granular sludge and GAC at different dosages and particle size. The cultures were incubated at different temperatures at 130 rpm. The kinetic parameters from experimental data were obtained using the Gompertz model. RESULTS The cultures with the LF and GAC (75-150 μm, 15 g/L) increased 1.87-fold the methane production compared to the control without GAC. The GAC at 75-150 μm showed lower lag phases and higher Rmax than the cultures with GAC at 590-600 μm. The cumulative methane production at 45 °C with the RE + GAC was 7.4-fold higher than the control. Moreover, methane production at 45 °C significantly increased with the cultures LF + GAC (6.0-fold) and SF + GAC (2.0-fold). The highest production of volatile fatty acids and ammonium was obtained at 45 °C regardless of the substrate and the addition of GAC contributed to a higher extent than the cultures lacking GAC. In most cases, the kinetic parameters at 30 °C and 37 °C were also higher with GAC. CONCLUSIONS GAC contributed to improving the fermentative and methanogenesis stages during the anaerobic digestion of fractions, evidenced by an improvement in the kinetic parameters.
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Affiliation(s)
- Miriam Orrantia
- Instituto Tecnológico de Sonora (ITSON), Departamento de Biotecnología y Ciencias Alimentarias, 5 de Febrero 818 Sur, C.P. 85000, Cuidad Obregón, Sonora, Mexico
| | - Edna R Meza-Escalante
- Instituto Tecnológico de Sonora (ITSON), Departamento de Ciencias Del Agua y Medio Ambiente, 5 de Febrero 818 Sur, C.P. 85000, Cuidad Obregón, Sonora, Mexico
| | - Vianey A Burboa-Charis
- Instituto Tecnológico de Sonora (ITSON), Departamento de Ciencias Del Agua y Medio Ambiente, 5 de Febrero 818 Sur, C.P. 85000, Cuidad Obregón, Sonora, Mexico
| | - Refugio B García-Reyes
- Universidad Autónoma de Nuevo León (UANL), Facultad de Ciencias Químicas. Av. Universidad S/N, Cd. Universitaria, San Nicolás de Los Garza, C.P. 66455, Nuevo León, Mexico
| | - Marina M Atilano-Camino
- Estación Regional Del Noroeste, Instituto de Geología, Universidad Nacional Autónoma de México, Hermosillo, 83000, Mexico
| | - Denisse Serrano-Palacios
- Instituto Tecnológico de Sonora (ITSON), Departamento de Ciencias Del Agua y Medio Ambiente, 5 de Febrero 818 Sur, C.P. 85000, Cuidad Obregón, Sonora, Mexico
| | - Luis A Leyva
- Instituto Tecnológico de Sonora (ITSON), Departamento de Biotecnología y Ciencias Alimentarias, 5 de Febrero 818 Sur, C.P. 85000, Cuidad Obregón, Sonora, Mexico
| | - Yair A Del Angel
- Universidad Autónoma de Nuevo León (UANL), Facultad de Ciencias Químicas. Av. Universidad S/N, Cd. Universitaria, San Nicolás de Los Garza, C.P. 66455, Nuevo León, Mexico
| | - Luis H Alvarez
- Instituto Tecnológico de Sonora (ITSON), Departamento de Ciencias Agronómicas y Veterinarias, 5 de Febrero 818 Sur, C.P. 85000, Cuidad Obregón, Sonora, Mexico.
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Shekhurdina S, Zhuravleva E, Kovalev A, Andreev E, Kryukov E, Loiko N, Laikova A, Popova N, Kovalev D, Vivekanand V, Litti Y. Comparative effect of conductive and dielectric materials on methanogenesis from highly concentrated volatile fatty acids. BIORESOURCE TECHNOLOGY 2023; 377:128966. [PMID: 36990327 DOI: 10.1016/j.biortech.2023.128966] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 03/19/2023] [Accepted: 03/23/2023] [Indexed: 06/19/2023]
Abstract
Various conductive materials and their dielectric counterparts were used to get deeper insights into contribution of direct interspecies electron transfer (DIET) in improving methanogenesis from highly concentrated volatile fatty acids (12.5 g/L). Potential CH4 yield, maximum CH4 production rate and lag phase were significantly (up to 1.4, 3.9 and 2.0 times, respectively) improved with addition of stainless-steel mesh (SM) and carbon felt (CF) compared to both control and dielectric counterparts (p < 0.05). kapp increased by 82% for SM and 63% for CF compared to control (p < 0.05). Short thick pili-like structures up to 150 nm in width were formed only in CF and SM biofilms, however, were more abundant for SM. Ureibacillus and Limnochordia specific for SM biofilms, and Coprothermobacter and Ca. Caldatribacterium for CF biofilms, were considered electrogenic. Promotion of DIET by conductive materials is governed by many factors, including specificity of electrogenic groups to material surface.
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Affiliation(s)
- Svetlana Shekhurdina
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7, Bld. 2, 117312 Moscow, Russia; Department of Biology, Lomonosov Moscow State University, Vorob'jovy gory, 119899 Moscow, Russia
| | - Elena Zhuravleva
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7, Bld. 2, 117312 Moscow, Russia
| | - Andrey Kovalev
- Federal Scientific Agroengineering Center VIM, 1st Institutsky proezd, 5, 109428 Moscow, Russia
| | - Egor Andreev
- M.V. Lomonosov Moscow State University, Chemistry Faculty, Leninskie gory 1, Build. 3, 119991 Moscow, Russia
| | - Emil Kryukov
- IM Sechenov First Moscow State Medical University, 8-2 Trubetskaya str. 119435 Moscow, Russia
| | - Natalia Loiko
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7, Bld. 2, 117312 Moscow, Russia
| | - Alexandra Laikova
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7, Bld. 2, 117312 Moscow, Russia; Department of Biology, Lomonosov Moscow State University, Vorob'jovy gory, 119899 Moscow, Russia
| | - Nadezhda Popova
- Frumkin Institute of Physical Chemistry and Electrochemistry RAS, 31, Bld.4, Leninsky prospect, 119071 Moscow, Russia
| | - Dmitriy Kovalev
- Federal Scientific Agroengineering Center VIM, 1st Institutsky proezd, 5, 109428 Moscow, Russia
| | - Vivekanand Vivekanand
- Centre for Energy and Environment, Malaviya National Institute of Technology Jaipur, Jaipur 302017, Rajasthan, India
| | - Yuriy Litti
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7, Bld. 2, 117312 Moscow, Russia.
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8
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Zheng X, Zhou W, Min B, Zhou Y, Xie L. Impact of carbon monoxide on performance and microbial community of extreme-thermophilic hydrogenotrophic methanation in horizontal rotary bioreactor. BIORESOURCE TECHNOLOGY 2023:129248. [PMID: 37247793 DOI: 10.1016/j.biortech.2023.129248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/25/2023] [Accepted: 05/26/2023] [Indexed: 05/31/2023]
Abstract
A novel horizontal rotary bioreactor was developed for upgrading biogas from coke oven gas at extreme-thermophilic condition. The introduction of CO decreased the outlet methane content from 80% to 50% due to insufficient H2. This hindrance was overcome by increasing the proportion of incoming hydrogen, coupled with a prolonged gas retention time from 24 to 72 h, leading to a restoration of methane content to 91.6%. Notably, CO and CO2 exhibited a competitive relationship to hydrogen, which was determined by their contents. The substitution of Methanothermobacter for Methanobacterium as the dominant genus was observed at 70°C, with relative abundance exceeding 98%. Incorporation of CO increased bacteria diversity and fostered a syntrophic relationship between the bacterial community and M. thermautotrophicus. This study provides both theoretical basis and practical support for biogas upgrading from coke oven gas using a biofilm reactor, thus aiding its future industrialization prospects.
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Affiliation(s)
- Xiaomei Zheng
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Wenjing Zhou
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Bolin Min
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Yuanyuan Zhou
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Chengdu institute of planning&design, Chengdu, 610000, China
| | - Li Xie
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
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Sun Z, He J, Yu N, Chen Y, Chen Y, Tang Y, Kida K. Biomethane production and microbial strategies corresponding to high organic loading treatment for molasses wastewater in an upflow anaerobic filter reactor. Bioprocess Biosyst Eng 2023:10.1007/s00449-023-02882-5. [PMID: 37209175 DOI: 10.1007/s00449-023-02882-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 05/10/2023] [Indexed: 05/22/2023]
Abstract
Molasses wastewater contains high levels of organic compounds, cations, and anions, causing operational problems for anaerobic biological treatment. In this study, an upflow anaerobic filter (UAF) reactor was employed to establish a high organic loading treatment system for molasses wastewater and further investigated the microbial community dynamics in response to this stressful operation. The biogas production increased with an increase in total organic carbon (TOC) loading rate from 1.0 to 14 g/L/day, and then it decreased with further TOC loading rate addition until 16 g/L/day. The UAF reactor achieved a maximum biogas production of 6800 mL/L/day with a TOC removal efficiency of 66.5% at a TOC loading rate of 14 g/L/day. Further microbial analyses revealed that both the bacterial and archaeal communities developed multiple strategies to maintain stable operation of the reactor at high organic loading (e.g., Proteiniphilum and Defluviitoga maintained high abundances throughout the operation; Tissierella temporarily dominated the bacterial community at TOC loading rates of 8.0 to 14 g/L/day; and multi-trophic Methanosarcina shifted as the dominant methanogen at the TOC loading rates of 8.0 to 16 g/L/day). This study presents insights into a high organic loading molasses wastewater treatment system and the microbial flexibility in methane fermentation in response to process disturbances.
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Affiliation(s)
- Zhaoyong Sun
- College of Architecture and Environment, Sichuan University, Chengdu, 610065, Sichuan, China
| | - Jinting He
- College of Architecture and Environment, Sichuan University, Chengdu, 610065, Sichuan, China
| | - Na Yu
- School of Environmental and Planning, Liaocheng University, Liaocheng, 252000, China
| | - Yuwei Chen
- Institute for Disaster Management and Reconstruction, Sichuan University-Hong Kong Polytechnic University, Chengdu, 610207, China
| | - Yating Chen
- College of Architecture and Environment, Sichuan University, Chengdu, 610065, Sichuan, China.
- Institute for Disaster Management and Reconstruction, Sichuan University-Hong Kong Polytechnic University, Chengdu, 610207, China.
| | - Yueqin Tang
- College of Architecture and Environment, Sichuan University, Chengdu, 610065, Sichuan, China
| | - Kenji Kida
- College of Architecture and Environment, Sichuan University, Chengdu, 610065, Sichuan, China
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Zhuravleva E, Kovalev A, Kovalev D, Kotova I, Shekhurdina S, Laikova A, Krasnovsky A, Pygamov T, Vivekanand V, Li L, He C, Litti Y. Does carbon cloth really improve thermophilic anaerobic digestion performance on a larger scale? focusing on statistical analysis and microbial community dynamics. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 341:118124. [PMID: 37172349 DOI: 10.1016/j.jenvman.2023.118124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 05/03/2023] [Accepted: 05/06/2023] [Indexed: 05/14/2023]
Abstract
Currently, the phenomenon of direct interspecies electron transfer (DIET) is of great interest in the technology of anaerobic digestion (AD) due to potential performance benefits. However, the conditions for the occurrence of DIET and its limits on improving AD under conditions close to real have not been studied enough. This research is concentrated on the effect of conductive carbon cloth (R3), in comparison with a dielectric fiberglass cloth (R2) and control (R1), on the AD performance in large (90 L) thermophilic reactors, fed with a mixture of simulated organic fraction of municipal solid waste and sewage sludge. While organic loading rate (OLR) was gradually increased from 2.4 to 8.66 kg VS/(m3 day), a statistically significant (p < 0.05) difference in biogas production was observed between R1 and both R2 and R3. However, at a maximum OLR of 12.12 kg VS/(m3 day) in R3, an increase in biogas production (p < 0.05) was observed both compared to R1 (by 8.97%) and R2 (by 4.24%). The content of volatile fatty acids in R3 as a whole was the lowest, especially at the maximum OLR. Biofilm on carbon cloth was rich in syntrophic microorganisms of the genera Tepidanaerobacter, as well as Defluviitoga, capable of DIET in mixed cultures with Methanothrix, which was the most abundant methanogen in biofilm. Suspended Bifidobacterium, Fervidobacterium and Anaerobaculum were negatively affected, while Defluviitoga, Methanothermobacter and Methanosarcina, on the contrary, were positively affected by the increase in OLR and showed, respectively, a negative and positive correlation (p < 0.05) with the main AD performance parameters.
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Affiliation(s)
- Elena Zhuravleva
- Federal Research Center "Fundamentals of Biotechnology" of the Russian Academy of Sciences; Moscow, Leninsky Prospekt, 33, 2, 119071, Russia; Department of Biology, Lomonosov Moscow State University; Moscow, Leninskie Gory, 1, 12, 119899, Russia.
| | - Andrey Kovalev
- Federal State Budgetary Scientific Institution "Federal Scientific Agroengineering Center VIM"; Moscow, 1st Institutskiy Proezd, 5, 109428, Russia.
| | - Dmitriy Kovalev
- Federal State Budgetary Scientific Institution "Federal Scientific Agroengineering Center VIM"; Moscow, 1st Institutskiy Proezd, 5, 109428, Russia.
| | - Irina Kotova
- Department of Biology, Lomonosov Moscow State University; Moscow, Leninskie Gory, 1, 12, 119899, Russia.
| | - Svetlana Shekhurdina
- Federal Research Center "Fundamentals of Biotechnology" of the Russian Academy of Sciences; Moscow, Leninsky Prospekt, 33, 2, 119071, Russia; Department of Biology, Lomonosov Moscow State University; Moscow, Leninskie Gory, 1, 12, 119899, Russia.
| | - Aleksandra Laikova
- Federal Research Center "Fundamentals of Biotechnology" of the Russian Academy of Sciences; Moscow, Leninsky Prospekt, 33, 2, 119071, Russia; Department of Biology, Lomonosov Moscow State University; Moscow, Leninskie Gory, 1, 12, 119899, Russia.
| | - Anatoly Krasnovsky
- National Research Tomsk State University, Tomsk, Lenin Ave., 36, 634050, Russia.
| | - Timur Pygamov
- Gubkin University, Moscow, Leninsky Prospekt, 65, 119991, Russia.
| | - Vivekanand Vivekanand
- Centre for Energy and Environment, Malaviya National Institute of Technology Jaipur, Jaipur, 302017, Rajasthan, India.
| | - Lianhua Li
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, China.
| | - Chao He
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy of China's Ministry of Agriculture and Rural Affairs, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Yuriy Litti
- Federal Research Center "Fundamentals of Biotechnology" of the Russian Academy of Sciences; Moscow, Leninsky Prospekt, 33, 2, 119071, Russia.
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Luiz FN, Passarini MRZ, Magrini FE, Gaio J, Somer JG, Meyer RF, Paesi S. Metataxonomic characterization of the microbial community involved in the production of biogas with microcrystalline cellulose in pilot and laboratory scale. World J Microbiol Biotechnol 2023; 39:184. [PMID: 37147463 DOI: 10.1007/s11274-023-03573-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 03/08/2023] [Indexed: 05/07/2023]
Abstract
Biogas, produced in anaerobic digestion, is a sustainable alternative for generating energy from agro-industrial and municipal waste. Information from the microbiota active in the process expands the possibilities for technological innovation. In this study, taxonomic annotations, and functional prediction of the microbial community of the inoculum of two processes were carried out: an industrial unit (pilot-scale urban solid waste plant-IU) and a laboratory-scale reactor fed with swine and cattle waste (LS). The biochemical potential of biogas was obtained using tested inoculum with microcrystalline cellulose, obtaining 682 LN/kgVS (LSC-laboratory scale inoculum and microcrystalline cellulose), and 583 LN/kgVS (IUC-industrial unit inoculum and microcrystalline cellulose), which is equivalent to a recovery of 91.5% of total biogas to LSC. The phyla Synergistota and Firmicutes were more abundant in LS/LSC. In the IU/IUC (treatment of restaurant waste and customs seizures), there was a greater microbiological variety and a predominance of the Bacteroidota, Cloacimonadota, Firmicutes and Caldatribacteriota. The genus Methanosaeta predominated in the process, and it was possible to infer the genes (K01895, K00193 and K00625) related to acetoclastic pathway, as well as endoglucanases that are involved in the metabolism of cellulose (LSC). Terpenoids, polyketides, cofactors, and vitamin metabolism were higher in reactors that received different substrates (IU; IUC). The taxonomic and functional differences revealed the importance of determining the microbiota in the analysis of the potential of an inoculum, combined with the use of microcrystalline cellulose, which can provide optimization information in the production of clean energy.
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Affiliation(s)
- Franciele Natividade Luiz
- International Center of Renewable Energy (CIBIOGAS-ER)-Itaipu, Foz do Iguaçu, PR, Brazil
- Federal University of Latin American Integration (UNILA)-Environmental Biotechnology Laboratory, Foz do Iguaçu, PR, Brazil
| | | | - Flaviane Eva Magrini
- Molecular Diagnostic Laboratory, Biotechnology Institute, University of Caxias Do Sul (UCS), Caxias do Sul, RS, 95070-560, Brazil
| | - Juliano Gaio
- Molecular Diagnostic Laboratory, Biotechnology Institute, University of Caxias Do Sul (UCS), Caxias do Sul, RS, 95070-560, Brazil
| | - Juliana Gaio Somer
- International Center of Renewable Energy (CIBIOGAS-ER)-Itaipu, Foz do Iguaçu, PR, Brazil
- Federal University of Latin American Integration (UNILA)-Environmental Biotechnology Laboratory, Foz do Iguaçu, PR, Brazil
| | - Rafaela Faust Meyer
- International Center of Renewable Energy (CIBIOGAS-ER)-Itaipu, Foz do Iguaçu, PR, Brazil
- Federal University of Latin American Integration (UNILA)-Environmental Biotechnology Laboratory, Foz do Iguaçu, PR, Brazil
| | - Suelen Paesi
- Molecular Diagnostic Laboratory, Biotechnology Institute, University of Caxias Do Sul (UCS), Caxias do Sul, RS, 95070-560, Brazil.
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Kovalev AA, Kovalev DA, Zhuravleva EA, Laikova AA, Shekhurdina SV, Vivekanand V, Litti YV. Biochemical hydrogen potential assay for predicting the patterns of the kinetics of semi-continuous dark fermentation. BIORESOURCE TECHNOLOGY 2023; 376:128919. [PMID: 36934902 DOI: 10.1016/j.biortech.2023.128919] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 03/13/2023] [Accepted: 03/15/2023] [Indexed: 06/18/2023]
Abstract
The performance and kinetics response of thermophilic semi-continuous dark fermentation (DF) of simulated complex carbohydrate-rich waste was investigated at various hydraulic retention times (HRT) (2, 2.5, and 3 d) and compared with data obtained from biochemical hydrogen potential assay (BHP). A culture of Thermoanaerobacterium thermosaccharolyticum was used as the inoculum and dominated both in BHP and semi-continuous reactor. Both the modified Gompertz and first-order models described the DF kinetics well (R2 = 0.97-1.00). HRT of 2.5 d was found to be optimal in terms of maximum hydrogen production rate and hydrogen potential, which were 3.97 and 1.26 times higher, respectively, than in BHP. The hydrolysis constant was highest at HRT of 3 d and was closest to the value obtained in the BHP. Overall, BHP has been shown to be a useful tool for predicting H2 potential and the hydrolysis constant, while the maximum H2 production rate is greatly underestimated.
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Affiliation(s)
- Andrey A Kovalev
- Federal Scientific Agroengineering Center VIM, 1st Institutsky Proezd, 5, 109428 Moscow, Russia.
| | - Dmitriy A Kovalev
- Federal Scientific Agroengineering Center VIM, 1st Institutsky Proezd, 5, 109428 Moscow, Russia
| | - Elena A Zhuravleva
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 Let Oktjabrja Pr-t, 7, Bld. 2, 117312 Moscow, Russia
| | - Alexandra A Laikova
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 Let Oktjabrja Pr-t, 7, Bld. 2, 117312 Moscow, Russia
| | - Svetlana V Shekhurdina
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 Let Oktjabrja Pr-t, 7, Bld. 2, 117312 Moscow, Russia
| | - Vivekanand Vivekanand
- Centre for Energy and Environment, Malaviya National Institute of Technology Jaipur, Jaipur 302017, Rajasthan, India
| | - Yuriy V Litti
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 Let Oktjabrja Pr-t, 7, Bld. 2, 117312 Moscow, Russia
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13
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Chen H, Yuan J, Xu Q, Yang E, Yang T, Shi L, Liu Z, Yu H, Cao J, Zhou Q, Chen J. Swine wastewater treatment using combined up-flow anaerobic sludge blanket and anaerobic membrane bioreactor: Performance and microbial community diversity. BIORESOURCE TECHNOLOGY 2023; 373:128606. [PMID: 36638895 DOI: 10.1016/j.biortech.2023.128606] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 01/06/2023] [Accepted: 01/09/2023] [Indexed: 06/17/2023]
Abstract
To address the existing economic and environmental issues associated with swine wastewater (SW) treatment, a process combining up-flow anaerobic sludge blanket (UASB) and anaerobic membrane bioreactor (AnMBR) was developed and continuously operated for 137 d. Bioreactor conversion and microbial community dynamics in reactors were analyzed. The UASB-AnMBR process yielded excellent pollutants removal efficiencies of 96% and 63% for chemical oxygen demand (COD) and total phosphorous (TP), respectively. More than 60% of Firmicutes (Terrisporobacter, Turicibacter, and Clostridium sensu stricto 1), which were dominated by Methanosaeta and Methanobacterium with relative abundances of 58.6% and 36.8% in the UASB and 22.5% and 40.3% in the AnMBR, respectively, converted complex compounds into organic acids for methanogenesis. This research presented an analysis of pollutants removal and microbial dynamics of UASB-AnMBR, which significantly affected the large-scale application of UASB-AnMBR process.
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Affiliation(s)
- Hong Chen
- Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410004, China; Department of Civil and Environmental Engineering, Graduate School of Engineering Tohoku University, Sendai 980-8579, Japan; Fujian Strait Graphene Industrial Technology Research Institute, Jinjiang 362200, China
| | - Jicheng Yuan
- Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410004, China; Fujian Strait Graphene Industrial Technology Research Institute, Jinjiang 362200, China
| | - Qianfeng Xu
- Department of Urology, the Second Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou 510180, China
| | - Enzhe Yang
- Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410004, China
| | - Tao Yang
- Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410004, China
| | - Lixiu Shi
- Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410004, China.
| | - Zhihua Liu
- Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410004, China
| | - Hanbo Yu
- Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410004, China; Fujian Strait Graphene Industrial Technology Research Institute, Jinjiang 362200, China
| | - Jiao Cao
- Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410004, China
| | - Quan Zhou
- Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410004, China
| | - Jing Chen
- Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410004, China
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14
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A Review of Basic Bioinformatic Techniques for Microbial Community Analysis in an Anaerobic Digester. FERMENTATION-BASEL 2023. [DOI: 10.3390/fermentation9010062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Biogas production involves various types of intricate microbial populations in an anaerobic digester (AD). To understand the anaerobic digestion system better, a broad-based study must be conducted on the microbial population. Deep understanding of the complete metagenomics including microbial structure, functional gene form, similarity/differences, and relationships between metabolic pathways and product formation, could aid in optimization and enhancement of AD processes. With advancements in technologies for metagenomic sequencing, for example, next generation sequencing and high-throughput sequencing, have revolutionized the study of microbial dynamics in anaerobic digestion. This review includes a brief introduction to the basic process of metagenomics research and includes a detailed summary of the various bioinformatics approaches, viz., total investigation of data obtained from microbial communities using bioinformatics methods to expose metagenomics characterization. This includes (1) methods of DNA isolation and sequencing, (2) investigation of anaerobic microbial communities using bioinformatics techniques, (3) application of the analysis of anaerobic microbial community and biogas production, and (4) restriction and prediction of bioinformatics analysis on microbial metagenomics. The review has been concluded, giving a summarized insight into bioinformatic tools and also promoting the future prospects of integrating humungous data with artificial intelligence and neural network software.
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15
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Pretreatment in Vortex Layer Apparatus Boosts Dark Fermentative Hydrogen Production from Cheese Whey. FERMENTATION-BASEL 2022. [DOI: 10.3390/fermentation8120674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dark fermentation (DF) is a promising process for mitigating environmental pollution and producing “green” H2. However, wider implementation and scaling of this technology is hampered by insufficient process efficiency. In this work, for the first time, the effect of innovative pretreatment of cheese whey (CW) in a vortex layer apparatus (VLA) on characteristics and DF of CW was studied. Pretreatment in VLA resulted in a heating of the CW, slight increase in pH, volatile fatty acids, iron, and reduction in fat, sugar, and chemical oxygen demand (COD). The biochemical hydrogen potential test and analysis of H2 production kinetics confirmed the significant potential of using VLA in enhancement of dark fermentative H2 production. The maximum potential H2 yield (202.4 mL H2/g COD or 3.4 mol H2/mol hexose) was obtained after pretreatment in VLA for 45 s and was 45.8% higher than the control. The maximum H2 production rate after 5 and 45 s of pretreatment was 256.5 and 237.2 mL H2/g COD/d, respectively, which is 8.06 and 7.46 times higher than in the control. The lag phase was more than halved as a function of the pretreatment time. The pretreatment time positively correlated with the total final concentration of Fe2+ and Fe3+ and negatively with the lag phase, indicating a positive effect of pretreatment in VLA on the start of H2 production.
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16
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Yin J, Li J, Qiu X, Zhou Y, Wang M, Feng H, Li Y, Chen X, Chen T. Effect of magnetite particle size on propionate degradation in the propionate-based anaerobic system. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 847:157592. [PMID: 35901882 DOI: 10.1016/j.scitotenv.2022.157592] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 07/19/2022] [Accepted: 07/19/2022] [Indexed: 06/15/2023]
Abstract
The size effect of magnetite (Fe3O4) on the degradation of propionate (PA) in the PA-based anaerobic system was investigated. The sequential bench-scale experiments were conducted. Results showed that the effects of different sized magnetite particles on PA degradation varied, and reaction cycles also played a role in substrate removal/degradation. With the increase of reaction cycle, nano-magnetite promoted PA degradation and CH4 production, which caused faster PA degradation rate (0.997 g/L·d) than the control group (CK) without magnetite (0.834 g/L·d), whereas the groups with micron- and millimeter-sized magnetite had slower PA degradation rates (0.746 and 0.636 g/L·d) than CK group. The particle size or surface characteristics of the magnetite may become the main factor determining the PA degradation rate. Furthermore, the analysis of PA conversion and volatile fatty acids (VFAs) distribution showed the C6-dismutation pathway, which converses PA to butyrate, enhanced by the introduction of magnetite. Microbial community analysis showed that PA was degraded mainly by methyl-malonyl-CoA (MMC) pathway. The relative abundance of Syntrophobacter that catalyze MMC pathway in the group with nano-magnetite were much higher after three reaction cycles at 39 %, as compared to micro-magnetite at 28 %, and millimeter-sized magnetite at 27 %, which contributed to faster degradation of PA. Functional enzyme-encoding genes for the four methanogenesis pathways were identified with reference to KEGG database entries. The methanogenesis pathway using acetate was the most abundant pathway in all groups. The observations have important implications for enhancing the PA removal in PA-inhibited anaerobic digester.
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Affiliation(s)
- Jun Yin
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China; Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Hangzhou 310012, PR China; Instrumental Analysis Center of Zhejiang Gongshang University, Hangzhou 310018, PR China
| | - Junrou Li
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China; Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Hangzhou 310012, PR China; Instrumental Analysis Center of Zhejiang Gongshang University, Hangzhou 310018, PR China
| | - Xiaopeng Qiu
- Huadong Engineering Corporation Limited of Power China, Hangzhou 311122, PR China
| | - Yuyang Zhou
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China; Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Hangzhou 310012, PR China; Instrumental Analysis Center of Zhejiang Gongshang University, Hangzhou 310018, PR China
| | - Meizhen Wang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China; Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Hangzhou 310012, PR China; Instrumental Analysis Center of Zhejiang Gongshang University, Hangzhou 310018, PR China
| | - Huajun Feng
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China; Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Hangzhou 310012, PR China; Instrumental Analysis Center of Zhejiang Gongshang University, Hangzhou 310018, PR China
| | - Yangyang Li
- Jiaxing Green Energy Environmental Protection Technology Co., Ltd., Jiaxing 314015, PR China
| | - Xin Chen
- Jiaxing Green Energy Environmental Protection Technology Co., Ltd., Jiaxing 314015, PR China
| | - Ting Chen
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China; Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Hangzhou 310012, PR China; Instrumental Analysis Center of Zhejiang Gongshang University, Hangzhou 310018, PR China.
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