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Pires CS, Costa L, Barbosa SG, Sequeira JC, Cachetas D, Freitas JP, Martins G, Machado AV, Cavaleiro AJ, Salvador AF. Microplastics Biodegradation by Estuarine and Landfill Microbiomes. MICROBIAL ECOLOGY 2024; 87:88. [PMID: 38943017 PMCID: PMC11213754 DOI: 10.1007/s00248-024-02399-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Accepted: 06/10/2024] [Indexed: 06/30/2024]
Abstract
Plastic pollution poses a worldwide environmental challenge, affecting wildlife and human health. Assessing the biodegradation capabilities of natural microbiomes in environments contaminated with microplastics is crucial for mitigating the effects of plastic pollution. In this work, we evaluated the potential of landfill leachate (LL) and estuarine sediments (ES) to biodegrade polyethylene (PE), polyethylene terephthalate (PET), and polycaprolactone (PCL), under aerobic, anaerobic, thermophilic, and mesophilic conditions. PCL underwent extensive aerobic biodegradation with LL (99 ± 7%) and ES (78 ± 3%) within 50-60 days. Under anaerobic conditions, LL degraded 87 ± 19% of PCL in 60 days, whereas ES showed minimal biodegradation (3 ± 0.3%). PE and PET showed no notable degradation. Metataxonomics results (16S rRNA sequencing) revealed the presence of highly abundant thermophilic microorganisms assigned to Coprothermobacter sp. (6.8% and 28% relative abundance in anaerobic and aerobic incubations, respectively). Coprothermobacter spp. contain genes encoding two enzymes, an esterase and a thermostable monoacylglycerol lipase, that can potentially catalyze PCL hydrolysis. These results suggest that Coprothermobacter sp. may be pivotal in landfill leachate microbiomes for thermophilic PCL biodegradation across varying conditions. The anaerobic microbial community was dominated by hydrogenotrophic methanogens assigned to Methanothermobacter sp. (21%), pointing at possible syntrophic interactions with Coprothermobacter sp. (a H2-producer) during PCL biodegradation. In the aerobic experiments, fungi dominated the eukaryotic microbial community (e.g., Exophiala (41%), Penicillium (17%), and Mucor (18%)), suggesting that aerobic PCL biodegradation by LL involves collaboration between fungi and bacteria. Our findings bring insights on the microbial communities and microbial interactions mediating plastic biodegradation, offering valuable perspectives for plastic pollution mitigation.
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Affiliation(s)
- Cristina S Pires
- CEB - Centre of Biological Engineering, University of Minho, Braga, Portugal
| | - Luís Costa
- CEB - Centre of Biological Engineering, University of Minho, Braga, Portugal
| | - Sónia G Barbosa
- CEB - Centre of Biological Engineering, University of Minho, Braga, Portugal
- LABBELS - Associate Laboratory, Braga/Guimarães, Portugal
| | | | - Diogo Cachetas
- CEB - Centre of Biological Engineering, University of Minho, Braga, Portugal
| | - José P Freitas
- CEB - Centre of Biological Engineering, University of Minho, Braga, Portugal
| | - Gilberto Martins
- CEB - Centre of Biological Engineering, University of Minho, Braga, Portugal
- LABBELS - Associate Laboratory, Braga/Guimarães, Portugal
| | - Ana Vera Machado
- IPC - Institute for Polymers and Composites, University of Minho, Guimarães, Portugal
| | - Ana J Cavaleiro
- CEB - Centre of Biological Engineering, University of Minho, Braga, Portugal.
- LABBELS - Associate Laboratory, Braga/Guimarães, Portugal.
| | - Andreia F Salvador
- CEB - Centre of Biological Engineering, University of Minho, Braga, Portugal
- LABBELS - Associate Laboratory, Braga/Guimarães, Portugal
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Zhu X, Li P, Ju F. Microbiome dynamics and products profiles of biowaste fermentation under different organic loads and additives. Eng Life Sci 2024; 24:2300216. [PMID: 38708413 PMCID: PMC11065332 DOI: 10.1002/elsc.202300216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/26/2023] [Accepted: 10/05/2023] [Indexed: 05/07/2024] Open
Abstract
Biowaste fermentation is a promising technology for low-carbon print bioenergy and biochemical production. Although it is believed that the microbiome determines both the fermentation efficiency and the product profiles of biowastes, the explicit mechanisms of how microbial activity controls fermentation processes remained to be unexplored. The current study investigated the microbiome dynamics and fermentation product profiles of biowaste fermentation under different organic loads (5, 20, and 40 g-VS/L) and with additives that potentially modulate the fermentation process via methanogenesis inhibition (2-bromoethanesulfonate) or electron transfer promotion (i.e., reduced iron, magnetite iron, and activated carbon). The overall fermentation products yields were 440, 373 and 208 CH4-eq/g-VS for low-, medium- and high-load fermentation. For low- and medium-load fermentation, volatile fatty acids (VFAs) were first accumulated and were gradually converted to methane. For high-load fermentation, VFAs were the main fermentation products during the entire fermentation period, accounting for 62% of all products. 16S rRNA-based analyses showed that both 2-bromoethanesulfonate addition and increase of organic loads inhibited the activity of methanogens and promoted the activity of distinct VFA-producing bacterial microbiomes. Moreover, the addition of activated carbon promoted the activity of H2-producing Bacteroides, homoacetogenic Eubacteriaceae and methanogenic Methanosarcinaceae, whose activity dynamics during the fermentation led to changes in acetate and methane production. The current results unveiled mechanisms of microbiome activity dynamics shaping the biowaste fermentation product profiles and provided the fundamental basis for the development of microbiome-guided engineering approaches to modulate biowaste fermentation toward high-value product recovery.
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Affiliation(s)
- Xinyu Zhu
- Key Laboratory of Coastal Environment and Resources of Zhejiang ProvinceSchool of EngineeringWestlake UniversityHangzhouZhejiang ProvinceChina
- Environmental Microbiome and Biotechnology Laboratory, Center of Synthetic Biology and Integrated BioengineeringWestlake UniversityHangzhouZhejiang ProvinceChina
- Institute of Advanced TechnologyWestlake Institute for Advanced StudyHangzhouZhejiang ProvinceChina
- Westlake Laboratory of Life Sciences and BiomedicineHangzhouChina
| | - Ping Li
- Key Laboratory of Coastal Environment and Resources of Zhejiang ProvinceSchool of EngineeringWestlake UniversityHangzhouZhejiang ProvinceChina
- Environmental Microbiome and Biotechnology Laboratory, Center of Synthetic Biology and Integrated BioengineeringWestlake UniversityHangzhouZhejiang ProvinceChina
- Institute of Advanced TechnologyWestlake Institute for Advanced StudyHangzhouZhejiang ProvinceChina
| | - Feng Ju
- Key Laboratory of Coastal Environment and Resources of Zhejiang ProvinceSchool of EngineeringWestlake UniversityHangzhouZhejiang ProvinceChina
- Environmental Microbiome and Biotechnology Laboratory, Center of Synthetic Biology and Integrated BioengineeringWestlake UniversityHangzhouZhejiang ProvinceChina
- Institute of Advanced TechnologyWestlake Institute for Advanced StudyHangzhouZhejiang ProvinceChina
- Westlake Laboratory of Life Sciences and BiomedicineHangzhouChina
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Krohn C, Jansriphibul K, Dias DA, Rees CA, Akker BVD, Boer JC, Plebanski M, Surapaneni A, O'Carroll D, Richard S, Batstone DJ, Ball AS. Dead in the water - Role of relic DNA and primer choice for targeted sequencing surveys of anaerobic sewage sludge intended for biological monitoring. WATER RESEARCH 2024; 253:121354. [PMID: 38428359 DOI: 10.1016/j.watres.2024.121354] [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: 10/05/2023] [Revised: 02/20/2024] [Accepted: 02/21/2024] [Indexed: 03/03/2024]
Abstract
DNA-based monitoring of microbial communities that are responsible for the performance of anaerobic digestion of sewage wastes has the potential to improve resource recoveries for wastewater treatment facilities. By treating sludge with propidium monoazide (PMA) prior to amplicon sequencing, this study explored how the presence of DNA from dead microbial biomass carried over with feed sludge may mislead process-relevant biomarkers, and whether primer choice impacts such assessments. Four common primers were selected for amplicon preparation, also to determine if universal primers have sufficient taxonomic or functional coverage for monitoring ecological performance; or whether two domain-specific primers for Bacteria and Archaea are necessary. Anaerobic sludges of three municipal continuously stirred-tank reactors in Victoria, Australia, were sampled at one time-point. A total of 240 amplicon libraries were sequenced on a Miseq using two universal and two domain-specific primer pairs. Untargeted metabolomics was chosen to complement biological interpretation of amplicon gene-based functional predictions. Diversity, taxonomy, phylogeny and functional potentials were systematically assessed using PICRUSt2, which can predict community wide pathway abundance. The two chosen universal primers provided similar diversity profiles of abundant Bacteria and Archaea, compared to the domain-specific primers. About 16 % of all detected prokaryotic genera covering 30 % of total abundances and 6 % of PICRUSt2-estimated pathway abundances were affected by PMA. This showed that dead biomass in the anaerobic digesters impacted DNA-based assessments, with implications for predicting active processes, such as methanogenesis, denitrification or the identification of organisms associated with biological foams. Hence, instead of running two sequencing runs with two different domain-specific primers, we propose conducting PMA-seq with universal primer pairs for routine performance monitoring. However, dead sludge biomass may have some predictive value. In principal component analysis the compositional variation of 239 sludge metabolites resembled that of 'dead-plus-alive' biomass, suggesting that dead organisms contributed to the potentially process-relevant sludge metabolome.
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Affiliation(s)
- Christian Krohn
- ARC Training Centre for the Transformation of Australia's Biosolids Resource, RMIT University, Building 215, Level 3, Room 003-06, RMIT Bundoora West Campus, 225-245 Plenty Road, Bundoora, Victoria 3083, Australia.
| | - Kraiwut Jansriphibul
- ARC Training Centre for the Transformation of Australia's Biosolids Resource, RMIT University, Building 215, Level 3, Room 003-06, RMIT Bundoora West Campus, 225-245 Plenty Road, Bundoora, Victoria 3083, Australia
| | - Daniel A Dias
- Centre for Advanced Sensory Science (CASS) Food Research Centre, School of Exercise and Nutrition Sciences, Deakin University, Melbourne Burwood Campus, 221 Burwood Highway, Burwood, Victoria 3125, Australia
| | - Catherine A Rees
- Melbourne Water Corporation, 990 La Trobe Street, Docklands, Victoria 3008, Australia
| | - Ben van den Akker
- South Australian Water Corporation, Adelaide, South Australia 5000, Australia
| | - Jennifer C Boer
- Cancer Aging and Vaccine Laboratory, School of Health and Biomedical Sciences, RMIT University, Bundoora, Victoria 3083, Australia
| | - Magdalena Plebanski
- Cancer Aging and Vaccine Laboratory, School of Health and Biomedical Sciences, RMIT University, Bundoora, Victoria 3083, Australia
| | - Aravind Surapaneni
- ARC Training Centre for the Transformation of Australia's Biosolids Resource, RMIT University, Building 215, Level 3, Room 003-06, RMIT Bundoora West Campus, 225-245 Plenty Road, Bundoora, Victoria 3083, Australia; South East Water, 101 Wells Street, Frankston, Victoria 3199, Australia
| | - Denis O'Carroll
- Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Stuetz Richard
- Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Damien J Batstone
- ARC Training Centre for the Transformation of Australia's Biosolids Resource, RMIT University, Building 215, Level 3, Room 003-06, RMIT Bundoora West Campus, 225-245 Plenty Road, Bundoora, Victoria 3083, Australia; Australian Centre for Water and Environmental Biotechnology (ACWEB), Gehrmann Building, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Andrew S Ball
- ARC Training Centre for the Transformation of Australia's Biosolids Resource, RMIT University, Building 215, Level 3, Room 003-06, RMIT Bundoora West Campus, 225-245 Plenty Road, Bundoora, Victoria 3083, Australia
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Andreides D, Lopez Marin MA, Zabranska J. Selective syngas fermentation to acetate under acidic and psychrophilic conditions using mixed anaerobic culture. BIORESOURCE TECHNOLOGY 2024; 394:130235. [PMID: 38141884 DOI: 10.1016/j.biortech.2023.130235] [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: 11/12/2023] [Revised: 12/15/2023] [Accepted: 12/19/2023] [Indexed: 12/25/2023]
Abstract
Syngas fermentation to acetate offers a promising solution for its valorisation, particularly when syngas contains a high N2 concentration, which otherwise impedes the utilisation of syngas biomethanation gaseous product in cogeneration or upgrading units. In this study, continuous lab-scale syngas fermentation assessing the effects of acidic pH and psychrophilic conditions (28 °C and 20 °C) on bioconversion efficiency and anaerobic consortium diversity was studied. The results showed that as temperature and pH decrease, acetate yield increases. The highest H2 and CO consumption rates were observed at 20 °C and pH 4.5, reaching 48.4 mmol/(L·d) and 31.5 mmol/(L·d), respectively, and methanogenic activity was not completely suppressed. The microbial community composition indicated an enhanced abundance of acetate-producing bacteria and hydrogenotrophic methanogens at 28 °C. The PICRUSt2 prediction of metabolic potential indicated that temperature and pH changes appear to have a more pronounced impact on acetotrophic methanogenesis genes than carbon dioxide-based methanogenesis genes.
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Affiliation(s)
- Dominik Andreides
- Department of Water Technology and Environmental Engineering, Faculty of Environmental Technology, University of Chemistry and Technology Prague, Technicka 1905, 166 28 Prague, Czech Republic.
| | - Marco A Lopez Marin
- Department of Water Technology and Environmental Engineering, Faculty of Environmental Technology, University of Chemistry and Technology Prague, Technicka 1905, 166 28 Prague, Czech Republic
| | - Jana Zabranska
- Department of Water Technology and Environmental Engineering, Faculty of Environmental Technology, University of Chemistry and Technology Prague, Technicka 1905, 166 28 Prague, Czech Republic
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5
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Lin M, Qiao W, Ren L, Sun Y, Zhang J, Dong R. Determination of effects of thermophilic and hyperthermophilic temperatures on anaerobic hydrolysis and acidogenesis of pig manure through a one-year study. BIORESOURCE TECHNOLOGY 2024; 391:129890. [PMID: 37858802 DOI: 10.1016/j.biortech.2023.129890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 10/01/2023] [Accepted: 10/16/2023] [Indexed: 10/21/2023]
Abstract
Improving hydrolysis and acidogenesis through thermophilic and hyperthermophilic temperatures is critical for enhancing the anaerobic decomposition of organic waste like pig manure. However, whether higher temperatures can provide more enhanced performance has not been elucidated experimentally. This study, therefore, conducted a 375-day continuous operation experiment at 55 and 70 °C with a 5-day hydraulic retention time. The two temperature reactors entered a stable state after about 200 days and long-term microbial acclimation markedly changed their performances. In the thermophilic and hyperthermophilic reactor, the hydrolysis efficiencies were obtained at 29.7 % and 27.3 % respectively, whereas the acidogenesis efficiency was relatively low at 1.0 % and 3.1 %. Due to the occurrence of methanogenesis, the volatile fatty acid concentration in the thermophilic reactor was only 45 % of that in the hyperthermophilic reactor. The thermophilic reactor exhibited higher bacterial diversity; however, this difference between the two reactors apparently did not correlate with hydrolysis and acidogenesis performance.
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Affiliation(s)
- Min Lin
- College of Engineering, China Agricultural University, Beijing 100083, China; Sanya Institute of China Agricultural University, Sanya, Hainan Province 572025, China
| | - Wei Qiao
- College of Engineering, China Agricultural University, Beijing 100083, China; Sanya Institute of China Agricultural University, Sanya, Hainan Province 572025, China.
| | - Lijuan Ren
- College of Engineering, China Agricultural University, Beijing 100083, China; Sanya Institute of China Agricultural University, Sanya, Hainan Province 572025, China
| | - Yibo Sun
- College of Engineering, China Agricultural University, Beijing 100083, China; Sanya Institute of China Agricultural University, Sanya, Hainan Province 572025, China
| | - Jiahao Zhang
- College of Engineering, China Agricultural University, Beijing 100083, China; Sanya Institute of China Agricultural University, Sanya, Hainan Province 572025, China
| | - Renjie Dong
- College of Engineering, China Agricultural University, Beijing 100083, China
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6
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Wang T, Wang J, Pu J, Bai C, Peng C, Shi H, Wu R, Xu Z, Zhang Y, Luo D, Yang L, Zhang Q. Comparison of Thermophilic-Mesophilic and Mesophilic-Thermophilic Two-Phase High-Solid Sludge Anaerobic Digestion at Different Inoculation Proportions: Digestion Performance and Microbial Diversity. Microorganisms 2023; 11:2409. [PMID: 37894067 PMCID: PMC10608829 DOI: 10.3390/microorganisms11102409] [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: 09/07/2023] [Revised: 09/20/2023] [Accepted: 09/25/2023] [Indexed: 10/29/2023] Open
Abstract
This study investigated the performance of thermophilic-mesophilic (T-M) and mesophilic-thermophilic (M-T) two-phase sludge anaerobic digestion at different inoculation proportions after a change in digestion temperature. After temperature change, the pH, total ammonia nitrogen (TAN), free ammonia nitrogen (FAN), solubility chemical oxygen demand (SCOD), and total alkalinity (TA) levels of two-phase digesters were between thermophilic control digesters and mesophilic control digesters. However, the volatile fatty acid (VFA) levels of two-phase digesters were higher than those of thermophilic or mesophilic control digesters. The bacteria communities of M-T two-phase digesters were more diverse than those of T-M. After a change in digestion temperature, the bacterial community was dominated by Coprothermobacter. After a change of digestion temperature, the relative abundance (RA) of Methanobacterium, Methanosaeta, and Methanospirillum of M-T two-phase digesters was higher than that of T-M two-phase digesters. In comparison, the RA of Methanosarcina of T-M two-phase digesters was higher than that of M-T two-phase digesters. The ultimate methane yields of thermophilic control digesters were greater than those of mesophilic control digesters. Nevertheless, the ultimate methane yield levels of M-T two-phase digesters were greater than those of T-M two-phase digesters. The ultimate methane yields of all two-phase digesters presented an earlier increase and later decrease trend with the increasing inoculation proportion. Optimal methane production condition was achieved when 15% of sludge (T-M15) was inoculated under mesophilic-thermophilic conditions, which promoted 123.6% (based on mesophilic control) or 27.4% (based on thermophilic control). An optimal inoculation proportion (about 15%) balanced the number and activity of methanogens of high-solid sludge anaerobic digestion.
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Affiliation(s)
- Tianfeng Wang
- College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (J.W.); (J.P.); (C.B.); (C.P.); (H.S.); (R.W.); (Z.X.); (Y.Z.); (D.L.); (L.Y.); (Q.Z.)
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7
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Leng H, Wang Y, Zhao W, Sievert SM, Xiao X. Identification of a deep-branching thermophilic clade sheds light on early bacterial evolution. Nat Commun 2023; 14:4354. [PMID: 37468486 DOI: 10.1038/s41467-023-39960-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 07/06/2023] [Indexed: 07/21/2023] Open
Abstract
It has been proposed that early bacteria, or even the last universal common ancestor of all cells, were thermophilic. However, research on the origin and evolution of thermophily is hampered by the difficulties associated with the isolation of deep-branching thermophilic microorganisms in pure culture. Here, we isolate a deep-branching thermophilic bacterium from a deep-sea hydrothermal vent, using a two-step cultivation strategy ("Subtraction-Suboptimal", StS) designed to isolate rare organisms. The bacterium, which we name Zhurongbacter thermophilus 3DAC, is a sulfur-reducing heterotroph that is phylogenetically related to Coprothermobacterota and other thermophilic bacterial groups, forming a clade that seems to represent a major, early-diverging bacterial lineage. The ancestor of this clade might be a thermophilic, strictly anaerobic, motile, hydrogen-dependent, and mixotrophic bacterium. Thus, our study provides insights into the early evolution of thermophilic bacteria.
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Affiliation(s)
- Hao Leng
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
- International Center for Deep Life Investigation (IC-DLI), Shanghai Jiao Tong University, Shanghai, China
| | - Yinzhao Wang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
- International Center for Deep Life Investigation (IC-DLI), Shanghai Jiao Tong University, Shanghai, China
| | - Weishu Zhao
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
- International Center for Deep Life Investigation (IC-DLI), Shanghai Jiao Tong University, Shanghai, China
| | - Stefan M Sievert
- Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA, USA
| | - Xiang Xiao
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China.
- International Center for Deep Life Investigation (IC-DLI), Shanghai Jiao Tong University, Shanghai, China.
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, Guangdong, China.
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Fan X, He L, Shi S, Huang Y, He X, Zhou Y, Zhou J. The coupling system of magnetite-enhanced thermophilic hydrolysis-acidification and denitrification for refractory organics removal from anaerobic digestate food waste effluent (ADFE). BIORESOURCE TECHNOLOGY 2023; 371:128601. [PMID: 36632852 DOI: 10.1016/j.biortech.2023.128601] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 01/05/2023] [Accepted: 01/07/2023] [Indexed: 06/17/2023]
Abstract
The aim of this study was to remove the refractory organics from high-temperature anaerobic digestate food waste effluent by the coupling system of hydrolysis-acidification and denitrification. Iron-based materials (magnetite, zero-valent iron, and iron-carbon) were used to enhance the performance of thermophilic hydrolysis-acidification. Compared with the control group, magnetite had the best strengthening effect, increasing volatile fatty acids concentration and fluorescence intensity of easily biodegradable organics in the effluent by 47.6 % and 108.4 %, respectively. The coupling system of magnetite-enhanced thermophilic hydrolysis-acidification and denitrification achieved a nitrate removal efficiency of 91.2 % (influent NO3--N was 150 mg L-1), and reduced the fluorescence intensity of refractory organics by 33.8 %, compared with influent. Microbiological analysis indicated that magnetite increased the relative abundance of thermophilic hydrolytic acidifying bacteria, and coupling system enriched some genera simultaneously removing nitrate and refractory organics. This study provided fresh information on refractory organics and nitrogen removal of thermophilic wastewater biologically.
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Affiliation(s)
- Xing Fan
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Lei He
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Shuohui Shi
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Yangyang Huang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Xuejie He
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Ying Zhou
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Jian Zhou
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China.
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Cuetero-Martínez Y, Flores-Ramírez A, De Los Cobos-Vasconcelos D, Aguirre-Garrido JF, López-Vidal Y, Noyola A. Removal of bacterial pathogens and antibiotic resistance bacteria by anaerobic sludge digestion with thermal hydrolysis pre-treatment and alkaline stabilization post-treatment. CHEMOSPHERE 2023; 313:137383. [PMID: 36436581 DOI: 10.1016/j.chemosphere.2022.137383] [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: 09/01/2022] [Revised: 11/22/2022] [Accepted: 11/23/2022] [Indexed: 06/16/2023]
Abstract
Primary sludge (PS) is associated with public health and environmental risks, so regulations focus on reducing the pathogenic and heavy metal contents of the treated material (biosolids), intended for soil amendments and land reclamation. The regulations set limits for Escherichia coli (or fecal coliforms), Salmonella spp., helminth eggs and enterovirus. However, the potential risk due to antibiotic resistant bacteria (ARB) and other human potential pathogenic bacteria (HPB) are not considered. In this work, three sludge treatment processes, having in common an anaerobic digestion step, were applied to assess the removal of regulated bacteria (fecal coliforms, Salmonella spp), ARB and HPB. The treatment arrangements, fed with PS from a full-scale wastewater treatment plant were: 1) Mesophilic anaerobic digestion followed by alkaline stabilization post-treatment (MAD-CaO); 2) Thermophilic anaerobic digestion (TAD) and, 3) Pre-treatment (mild thermo-hydrolysis) followed by TAD (PT-TAD). The results address the identification, quantification (colony forming units) and taxonomic characterization of ARB resistant to β-lactams and vancomycin, as well as the taxonomic characterization of HPB by sequencing with PacBio. In addition, quantification based on culture media of fecal coliforms and Salmonella spp. is presented. The capabilities and limitations of microbiological and metataxonomomic analyses based on PacBio sequencing are discussed, emphasizing that they complement each other. Genus Aeromonas, Acinetobacter, Citrobacter, Enterobacter, Escherichia, Klebsiella, Ochrobactrum, Pseudomonas and Raoultella, among others, were found in the PS, which are of clinical or environmental importance, being either HPB, HPB-ARB, or non-pathogenic ARB with the potentiality of horizontal gene transfer. Based on the analysis of fecal coliforms and Salmonella spp., the three processes produced class A (highest) biosolids, suitable for unrestricted agriculture applications. Mild thermo-hydrolisis was effective in decreasing ARB cultivability, but it reappeared after the following TAD. O. intermedium (HPB-ARB) was enriched in MAD and TAD while Laribacter hongkongensis (HPB) did persist after the applied treatments.
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Affiliation(s)
- Yovany Cuetero-Martínez
- Subdirección de Hidráulica y Ambiental, Instituto de Ingeniería, Universidad Nacional Autónoma de México, 04510 CDMX, Mexico; Doctorado en Ciencias Bioquímicas, Universidad Nacional Autónoma de México, 04510 CDMX, Mexico
| | - Aarón Flores-Ramírez
- Subdirección de Hidráulica y Ambiental, Instituto de Ingeniería, Universidad Nacional Autónoma de México, 04510 CDMX, Mexico
| | - Daniel De Los Cobos-Vasconcelos
- Subdirección de Hidráulica y Ambiental, Instituto de Ingeniería, Universidad Nacional Autónoma de México, 04510 CDMX, Mexico
| | - José Félix Aguirre-Garrido
- Departamento de Ciencias Ambientales, Universidad Autónoma Metropolitana - Unidad Lerma, 52005 Lerma de Villada, Edo. Mex, Mexico
| | - Yolanda López-Vidal
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, 04510 CDMX, Mexico
| | - Adalberto Noyola
- Subdirección de Hidráulica y Ambiental, Instituto de Ingeniería, Universidad Nacional Autónoma de México, 04510 CDMX, Mexico.
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Wu X, Zhou Y, Liang M, Lu X, Chen G, Zan F. Insights into the role of biochar on the acidogenic process and microbial pathways in a granular sulfate-reducing up-flow sludge bed reactor. BIORESOURCE TECHNOLOGY 2022; 355:127254. [PMID: 35525408 DOI: 10.1016/j.biortech.2022.127254] [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: 03/23/2022] [Revised: 04/26/2022] [Accepted: 04/29/2022] [Indexed: 06/14/2023]
Abstract
In this study, the effect of biochar on sulfate reduction and anaerobic acidogenic process was explored in a granular sulfate-reducing up-flow sludge bed reactor in both long-term operation and batch tests. Both bioreactors had a high sulfate reduction efficiency of over 95% during the long-term operation, while the reactor with biochar addition showed higher sulfate reduction efficiency and stronger robustness against volatile fatty acids accumulation with a higher organic loading and sulfate loading rate. Batch tests showed that adding biochar significantly lessened the lag phase of the sulfate-reducing process, accelerated the adaption of acidogens, and facilitated both production and utilization of volatile fatty acids. The microbial pathways proved that biochar could regulate the acidification fermentation pathway and facilitate the enrichment of assimilative desulfurization bacteria. Overall, this study revealed that the acidogenic sulfate-reducing metabolic pathway could be enhanced by biochar, offering a potential application for effective sulfate-laden wastewater treatment.
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Affiliation(s)
- Xiaohui Wu
- School of Environmental Science and Engineering, Low-Carbon Water Environment Technology Center (HUST-SUKE), Green Environmental Remediation Technology Center (HUST-Hikee), and Key Laboratory of Water & Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology, Wuhan, China
| | - Yawu Zhou
- School of Environmental Science and Engineering, Low-Carbon Water Environment Technology Center (HUST-SUKE), Green Environmental Remediation Technology Center (HUST-Hikee), and Key Laboratory of Water & Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology, Wuhan, China
| | - Muxiang Liang
- School of Environmental Science and Engineering, Low-Carbon Water Environment Technology Center (HUST-SUKE), Green Environmental Remediation Technology Center (HUST-Hikee), and Key Laboratory of Water & Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology, Wuhan, China
| | - Xiejuan Lu
- School of Environmental Science and Engineering, Low-Carbon Water Environment Technology Center (HUST-SUKE), Green Environmental Remediation Technology Center (HUST-Hikee), and Key Laboratory of Water & Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology, Wuhan, China
| | - Guanghao Chen
- Department of Civil and Environmental Engineering, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch), and Water Technology Center, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
| | - Feixiang Zan
- School of Environmental Science and Engineering, Low-Carbon Water Environment Technology Center (HUST-SUKE), Green Environmental Remediation Technology Center (HUST-Hikee), and Key Laboratory of Water & Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology, Wuhan, China.
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11
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Wolters B, Hauschild K, Blau K, Mulder I, Heyde BJ, Sørensen SJ, Siemens J, Jechalke S, Smalla K, Nesme J. Biosolids for safe land application: does wastewater treatment plant size matters when considering antibiotics, pollutants, microbiome, mobile genetic elements and associated resistance genes? Environ Microbiol 2022; 24:1573-1589. [PMID: 35192222 PMCID: PMC9306954 DOI: 10.1111/1462-2920.15938] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 02/04/2022] [Accepted: 02/11/2022] [Indexed: 01/04/2023]
Abstract
Soil fertilization with wastewater treatment plant (WWTP) biosolids is associated with the introduction of resistance genes (RGs), mobile genetic elements (MGEs) and potentially selective pollutants (antibiotics, heavy metals, disinfectants) into soil. Not much data are available on the parallel analysis of biosolid pollutant contents, RG/MGE abundances and microbial community composition. In the present study, DNA extracted from biosolids taken at 12 WWTPs (two large-scale, six middle-scale and four small-scale plants) was used to determine the abundance of RGs and MGEs via quantitative real-time PCR and the bacterial and archaeal community composition was assessed by 16S rRNA gene amplicon sequencing. Concentrations of heavy metals, antibiotics, the biocides triclosan, triclocarban and quaternary ammonium compounds (QACs) were measured. Strong and significant correlations were revealed between several target genes and concentrations of Cu, Zn, triclosan, several antibiotics and QACs. Interestingly, the size of the sewage treatment plant (inhabitant equivalents) was negatively correlated with antibiotic concentrations, RGs and MGEs abundances and had little influence on the load of metals and QACs or the microbial community composition. Biosolids from WWTPs with anaerobic treatment and hospitals in their catchment area were associated with a higher abundance of potential opportunistic pathogens and higher concentrations of QACs.
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Affiliation(s)
- Birgit Wolters
- Julius Kühn-Institut (JKI), Federal Research Centre for Cultivated Plants, Institute for Epidemiology and Pathogen Diagnostics, Braunschweig, Germany
| | - Kristin Hauschild
- Julius Kühn-Institut (JKI), Federal Research Centre for Cultivated Plants, Institute for Epidemiology and Pathogen Diagnostics, Braunschweig, Germany
| | - Khald Blau
- Julius Kühn-Institut (JKI), Federal Research Centre for Cultivated Plants, Institute for Epidemiology and Pathogen Diagnostics, Braunschweig, Germany
| | - Ines Mulder
- Justus Liebig University Giessen, Institute of Soil Science and Soil Conservation, iFZ Research Centre for Biosystems, Land Use and Nutrition, Giessen, Germany
| | - Benjamin Justus Heyde
- Justus Liebig University Giessen, Institute of Soil Science and Soil Conservation, iFZ Research Centre for Biosystems, Land Use and Nutrition, Giessen, Germany
| | - Søren J Sørensen
- Section of Microbiology, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Jan Siemens
- Justus Liebig University Giessen, Institute of Soil Science and Soil Conservation, iFZ Research Centre for Biosystems, Land Use and Nutrition, Giessen, Germany
| | - Sven Jechalke
- Justus Liebig University Giessen, Institute of Phytopathology, iFZ Research Centre for Biosystems, Land Use and Nutrition, Giessen, Germany
| | - Kornelia Smalla
- Julius Kühn-Institut (JKI), Federal Research Centre for Cultivated Plants, Institute for Epidemiology and Pathogen Diagnostics, Braunschweig, Germany
| | - Joseph Nesme
- Section of Microbiology, Department of Biology, University of Copenhagen, Copenhagen, Denmark
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12
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Camargo FP, Sakamoto IK, Delforno TP, Mariadassou M, Loux V, Midoux C, Duarte ICS, Silva EL, Bize A, Varesche MBA. Microbial and functional characterization of an allochthonous consortium applied to hydrogen production from Citrus Peel Waste in batch reactor in optimized conditions. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 291:112631. [PMID: 33932835 DOI: 10.1016/j.jenvman.2021.112631] [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: 11/23/2020] [Revised: 03/26/2021] [Accepted: 04/12/2021] [Indexed: 06/12/2023]
Abstract
Energy recovery from lignocellulosic waste has been studied as an alternative to the problem of inappropriate waste disposal. The present study aimed at characterizing the microbial community and the functional activity of reactors applied to H2 production through lignocellulosic waste fermentation in optimized conditions. The latter were identified by means of Rotational Central Composite Design (RCCD), applied to optimize allochthonous inoculum concentration (2.32-5.68 gTVS/L of granular anaerobic sludge), pH (4.32-7.68) and Citrus Peel Waste (CPW) concentration (1.55-28.45 g/L). After validation, the conditions identified for optimal H2 production were 4 gSTV/L of allochthonous inoculum, 29.8 g/L of CPW (substrate) and initial pH of 8.98. In these conditions, 48.47 mmol/L of H2 was obtained, which is 3.64 times higher than the concentration in unoptimized conditions (13.31 mmol H2/L using 15 g/L of CPW, 2 gTVS/L of allochthonous inoculum, pH 7.0). Acetogenesis was the predominant pathway, and maximal concentrations of 3,731 mg/L of butyric acid and 3,516 mg/L of acetic acid were observed. Regarding the metataxonomic profile, Clostridium genus was dramatically favored in the optimized condition (79.78%) when compared to the allochthonous inoculum (0.43%). It was possible to identify several genes related to H2 (i.e dehydrogenases) and volatile fatty acids (VFA) production and with cellulose degradation, especially some CAZymes from the classes Auxiliary Activities, Glycoside Hydrolases and Glycosyl Transferase. By means of differential gene expression it was observed that cellulose degradation and acetic acid production pathways were overabundant in samples from the optimized reactors, highlighting endo-β-1,4-glucanase/cellulose, endo-β-1,4-xylanase, β-glucosidase, β-mannosidase, cellulose β-1,4-cellobiosidase, cellobiohydrolase, and others, as main the functions.
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Affiliation(s)
- Franciele Pereira Camargo
- Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo (USP), Av. Trabalhador São Carlense, 400, 13566-590, São Carlos, SP, Brazil
| | - Isabel Kimiko Sakamoto
- Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo (USP), Av. Trabalhador São Carlense, 400, 13566-590, São Carlos, SP, Brazil
| | - Tiago Palladino Delforno
- Department of Biology, Federal University of São Carlos (UFSCar), João Leme dos Santos Highway, Km 101, zipcode 18052-780, Sorocaba, São Paulo, Brazil
| | - Mahendra Mariadassou
- Université Paris-Saclay, INRAE, BioinfOmics, MIGALE Bioinformatics Facility, 78350, Jouy-en-Josas, France; Université Paris Saclay, INRAE, MaIAGE, 78350, Jouy-en-Josas, France
| | - Valentin Loux
- Université Paris-Saclay, INRAE, BioinfOmics, MIGALE Bioinformatics Facility, 78350, Jouy-en-Josas, France; Université Paris Saclay, INRAE, MaIAGE, 78350, Jouy-en-Josas, France
| | - Cédric Midoux
- Université Paris-Saclay, INRAE, BioinfOmics, MIGALE Bioinformatics Facility, 78350, Jouy-en-Josas, France; Université Paris-Saclay, INRAE, PRocédés biOtechnologiques au Service de l'Environnement (PROSE), 92761, Antony, France; Université Paris Saclay, INRAE, MaIAGE, 78350, Jouy-en-Josas, France
| | - Iolanda Cristina Silveira Duarte
- Department of Biology, Federal University of São Carlos (UFSCar), João Leme dos Santos Highway, Km 101, zipcode 18052-780, Sorocaba, São Paulo, Brazil
| | - Edson Luiz Silva
- Department of Chemical Engineering, Federal University of São Carlos (UFSCar), Rod Washington Luiz, Km 235, SP 310, 13565-905, São Carlos, SP, Brazil
| | - Ariane Bize
- Université Paris-Saclay, INRAE, PRocédés biOtechnologiques au Service de l'Environnement (PROSE), 92761, Antony, France
| | - Maria Bernadete Amâncio Varesche
- Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo (USP), Av. Trabalhador São Carlense, 400, 13566-590, São Carlos, SP, Brazil.
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13
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Khan MA, Khan ST, Sequeira MC, Faheem SM, Rais N. Illumina sequencing of 16S rRNA genes reveals a unique microbial community in three anaerobic sludge digesters of Dubai. PLoS One 2021; 16:e0249023. [PMID: 33793629 PMCID: PMC8016227 DOI: 10.1371/journal.pone.0249023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 03/09/2021] [Indexed: 01/12/2023] Open
Abstract
Understanding the microbial communities in anaerobic digesters, especially bacteria and archaea, is key to its better operation and regulation. Microbial communities in the anaerobic digesters of the Gulf region where climatic conditions and other factors may impact the incoming feed are not documented. Therefore, Archaeal and Bacterial communities of three full-scale anaerobic digesters, namely AD1, AD3, and AD5 of the Jebel Ali Sewage water Treatment Plant (JASTP) were analyzed by Illumina sequencing of 16S rRNA genes. Among bacteria, the most abundant genus was fermentative bacteria Acetobacteroides (Blvii28). Other predominant bacterial genera in the digesters included thermophilic bacteria (Fervidobacterium and Coprothermobacter) and halophilic bacteria like Haloterrigena and Sediminibacter. This can be correlated with the climatic condition in Dubai, where the bacteria in the incoming feed may be thermophilic or halophilic as much of the water used in the country is desalinated seawater. The predominant Archaea include mainly the members of the phyla Euryarchaeota and Crenarchaeota belonging to the genus Methanocorpusculum, Metallosphaera, Methanocella, and Methanococcus. The highest population of Methanocorpusculum (more than 50% of total Archaea), and other hydrogenotrophic archaea, is in agreement with the high population of bacterial genera Acetobacteroides (Blvii28) and Fervidobacterium, capable of fermenting organic substrates into acetate and H2. Coprothermobacter, which is known to improve protein degradation by establishing syntrophy with hydrogenotrophic archaea, is also one of the digesters’ dominant genera. The results suggest that the microbial community in three full-scale anaerobic digesters is different. To best of our knowledge this is the first detailed report from the UAE.
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Affiliation(s)
- Munawwar Ali Khan
- Department of Life and Environmental Sciences, College of Natural and Health Sciences, Zayed University, Dubai, United Arab Emirates
| | - Shams Tabrez Khan
- Department of Agricultural Microbiology, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
- * E-mail:
| | - Milred Cedric Sequeira
- School of Life Sciences, Manipal Academy of Higher Education, Academic City, Dubai, United Arab Emirates
| | - Sultan Mohammad Faheem
- School of Life Sciences, Manipal Academy of Higher Education, Academic City, Dubai, United Arab Emirates
| | - Naushad Rais
- School of Life Sciences, Manipal Academy of Higher Education, Academic City, Dubai, United Arab Emirates
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14
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De la Cruz FB, Cheng Q, Call DF, Barlaz MA. Evidence of thermophilic waste decomposition at a landfill exhibiting elevated temperature regions. WASTE MANAGEMENT (NEW YORK, N.Y.) 2021; 124:26-35. [PMID: 33596536 DOI: 10.1016/j.wasman.2021.01.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 01/07/2021] [Accepted: 01/08/2021] [Indexed: 06/12/2023]
Abstract
There have been several reports of landfills exhibiting temperatures as high as 80 to 100 °C. This observation has motivated researchers to understand the causes of the elevated temperatures and to develop predictive models of landfill temperature. The objective of this research was to characterize the methanogenic activity of microbial communities that were derived from landfill samples excavated from a section of a landfill exhibiting gas well temperatures above 55 °C. Specific objectives were to: (1) determine the upper temperature limit for methane production; (2) evaluate the kinetics of methane generation when landfill-derived microcosms are incubated above and below their excavation temperature and derive a temperature inhibition function; and (3) evaluate microbial community shifts in response to temperature perturbations. Landfill microcosms were derived from 57 excavated landfill samples and incubated within ±2.5 °C of their excavation temperature between 42.5 °C and 87.5 °C. Results showed an optimum temperature for methane generation of ~57 °C and a 95% reduction in methane yield at ~72 °C. When select cultures were perturbed between 5 °C below and 15 °C above their in-situ temperature, both the rate and maximum methane production decreased as incubation temperature increased. Microbial community characterization using 16S rRNA amplicon sequencing suggests that thermophilic methanogenic activity can be attributed to methanogens of the genus Methanothermobacter. This study demonstrated that from a microbiological standpoint, landfills may maintain active methanogenic processes while experiencing temperatures in the thermophilic regime (<72 °C).
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Affiliation(s)
- Florentino B De la Cruz
- Department of Civil, Construction, and Environmental Engineering, Campus Box 7908, North Carolina State University, Raleigh, NC 27695-7908, United States.
| | - Qiwen Cheng
- Department of Civil, Construction, and Environmental Engineering, Campus Box 7908, North Carolina State University, Raleigh, NC 27695-7908, United States
| | - Douglas F Call
- Department of Civil, Construction, and Environmental Engineering, Campus Box 7908, North Carolina State University, Raleigh, NC 27695-7908, United States
| | - Morton A Barlaz
- Department of Civil, Construction, and Environmental Engineering, Campus Box 7908, North Carolina State University, Raleigh, NC 27695-7908, United States
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15
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Thermophilic Anaerobic Digestion of Second Cheese Whey: Microbial Community Response to H2 Addition in a Partially Immobilized Anaerobic Hybrid Reactor. Processes (Basel) 2020. [DOI: 10.3390/pr9010043] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this study, we investigated thermophilic (55 °C) anaerobic digestion (AD) performance and microbial community structure, before and after hydrogen addition, in a novel hybrid gas-stirred tank reactor (GSTR) implemented with a partial immobilization of the microbial community and fed with second cheese whey (SCW). The results showed that H2 addition led to a 25% increase in the methane production rate and to a decrease of 13% in the CH4 concentration as compared with the control. The recovery of methane content (56%) was reached by decreasing the H2 flow rate. The microbial community investigations were performed on effluent (EF) and on interstitial matrix (IM) inside the immobilized area. Before H2 addition, the Anaerobaculaceae (42%) and Lachnospiraceae (27%) families dominated among bacteria in the effluent, and the Thermodesulfobiaceae (32%) and Lachnospiraceae (30%) families dominated in the interstitial matrix. After H2 addition, microbial abundance showed an increase in the bacteria and archaea communities in the interstitial matrix. The Thermodesulfobiaceae family (29%)remained dominant in the interstitial matrix, suggesting its crucial role in the immobilized community and the SHA-31 family was enriched in both the effluent (36%) and the interstitial matrix (15%). The predominance of archaea Methanothermobacter thermoautrophicus indicated that CH4 was produced almost exclusively by the hydrogenotrophic pathway.
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16
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Chen L, Du S, Xie L. Effects of pH on ex-situ biomethanation with hydrogenotrophic methanogens under thermophilic and extreme-thermophilic conditions. J Biosci Bioeng 2020; 131:168-175. [PMID: 33199191 DOI: 10.1016/j.jbiosc.2020.09.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 08/26/2020] [Accepted: 09/26/2020] [Indexed: 11/16/2022]
Abstract
Ex-situ biogas upgrading based on hydrogenotrophic methanogenic process has attracted much attention with the depletion of fossil fuels. Consumption of CO2 leads to the pH increase in the mixed cultures of biogas upgrading system. The hydrogenotrophic methanogens were enriched at pH 5.5-6.0, 7.0-7.5, and 8.5-9.0 and at 55°C and 70°C. The methane production activity and microbial community structure were evaluated. Semi-continuous experimental results showed that stable and similar methane production was obtained at pH 7.0-7.5 and 8.5-9.0. In addition, pH 8.5-9.0 presented higher maximum methane production rate compared to pH 7.0-7.5. pH below 6 obtained the longest lag phase time of about 17.4 h, more than twice the values at pH 7.0-7.5 (8.8 h) and pH 8.5-9.0 (6.9 h) at 55°C. The predominant methanogen was the genus Methanothermobacter, a hydrogenotrophic methanogen at higher temperatures. Methanobacterium became predominant at pH 8.5-9.0 and the abundance increased to 83.6% at 55°C. Coprothermobacter and Caldanaerobacter were identified as the core functional bacteria under alkaline condition and were likely involved in syntrophic acetate oxidation with hydrogenotrophic methanogens.
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Affiliation(s)
- Lurui Chen
- Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Shiyun Du
- Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Li Xie
- Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
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17
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Matsuda S, Yamato T, Mochizuki Y, Sekiguchi Y, Ohtsuki T. Batch-Mode Analysis of Thermophilic Methanogenic Microbial Community Changes in the Overacidification Stage in Beverage Waste Treatment. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E7514. [PMID: 33076472 PMCID: PMC7602568 DOI: 10.3390/ijerph17207514] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/09/2020] [Accepted: 10/12/2020] [Indexed: 11/30/2022]
Abstract
Biogasification by methane fermentation is an important and effective way to utilize beverage wastes. Beverage wastes are good feedstocks for methane fermentation because of their richness in sugars and proteins, although overacidification and inhibition of methane production caused by high substrate loading often become problematic. This study investigated changes in microbial communities in the overacidification state of the thermophilic methane fermentation process with beverage waste by establishing a simulated batch culture. We assessed 20 mL-scale batch cultures using a simulant beverage waste mixture (SBWM) with different amounts of addition; high cumulative methane production was achieved by adding 5 mL of SBWM (11358 mg-chemical oxygen demand-COD/L of organic loading), and overacidification was observed by adding 10 mL of SBWM (22715 mg-COD/L of organic loading). The results of 16S rRNA amplicon sequence analysis using nanopore sequencer suggested that Coprothermobacter proteolyticus, Defluviitoga tunisiensis, Acetomicrobium mobile, and Thermosediminibacter oceani were predominantly involved in hydrolysis/acidogenesis/acetogenesis processes, whereas Methanothrix soehngenii was the major acetotrophic methane producer. A comparison of microbial population between the methane-producing cultures and overacidification cultures revealed characteristic population changes especially in some minor species under 0.2% of population. We concluded that careful monitoring of population changes of the minor species is a potential indicator for prediction of overacidification.
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Affiliation(s)
- Shuhei Matsuda
- Graduate School of Medicine, Engineering and Agricultural Sciences, University of Yamanashi, Kofu, Yamanashi 400-8510, Japan; (S.M.); (T.Y.)
| | - Takahiro Yamato
- Graduate School of Medicine, Engineering and Agricultural Sciences, University of Yamanashi, Kofu, Yamanashi 400-8510, Japan; (S.M.); (T.Y.)
| | | | | | - Takashi Ohtsuki
- Graduate School of Medicine, Engineering and Agricultural Sciences, University of Yamanashi, Kofu, Yamanashi 400-8510, Japan; (S.M.); (T.Y.)
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18
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Wang G, Li Y, Sheng L, Xing Y, Liu G, Yao G, Ngo HH, Li Q, Wang XC, Li YY, Chen R. A review on facilitating bio-wastes degradation and energy recovery efficiencies in anaerobic digestion systems with biochar amendment. BIORESOURCE TECHNOLOGY 2020; 314:123777. [PMID: 32665106 DOI: 10.1016/j.biortech.2020.123777] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 06/28/2020] [Accepted: 06/30/2020] [Indexed: 06/11/2023]
Abstract
In this review, progress in the potential mechanisms of biochar amendment for AD performance promotion was summarized. As adsorbents, biochar was beneficial for alleviating microbial toxicity, accelerating refractory substances degradation, and upgrading biogas quality. The buffering capacity of biochar balanced pH decreasing caused by volatile fatty acids accumulation. Moreover, biochar regulated microbial metabolism by boosting activities, mediating electron transfer between syntrophic partners, and enriching functional microbes. Recent studies also suggested biochar as potential useful additives for membrane fouling alleviation in anaerobic membrane bioreactors (AnMBR). By analyzing the reported performances based on different operation models or substrate types, debatable issues and associated research gaps of understanding the real role of biochar in AD were critically discussed. Accordingly, Future perspectives of developing biochar-amended AD technology for real-world applications were elucidated. Lastly, with biochar-amended AD as a core process, a novel integrated scheme was proposed towards high-efficient energy-resource recovery from various bio-wastes.
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Affiliation(s)
- Gaojun Wang
- Key Lab of Environmental Engineering, Shaanxi Province, 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, MOE, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China
| | - Yu Li
- Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China
| | - Li Sheng
- Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China
| | - Yao Xing
- Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China
| | - Guohao Liu
- Key Lab of Environmental Engineering, Shaanxi Province, 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, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China
| | - Huu Hao Ngo
- International S&T Cooperation Center for Urban Alternative Water Resources Development, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China; Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Qian Li
- Key Lab of Environmental Engineering, Shaanxi Province, 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, MOE, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China
| | - Xiaochang C Wang
- Key Lab of Environmental Engineering, Shaanxi Province, 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, MOE, 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 Aoba, Aramaki-Aza, Sendai, Miyagi 980-8579, Japan
| | - Rong Chen
- Key Lab of Environmental Engineering, Shaanxi Province, 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, MOE, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China.
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19
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Cardona L, Cao KAL, Puig-Castellví F, Bureau C, Madigou C, Mazéas L, Chapleur O. Integrative Analyses to Investigate the Link between Microbial Activity and Metabolite Degradation during Anaerobic Digestion. J Proteome Res 2020; 19:3981-3992. [DOI: 10.1021/acs.jproteome.0c00251] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Laëtitia Cardona
- Université Paris-Saclay, INRAE, PROSE, 1 rue Pierre-Gilles de Gennes, CS 10030, 92761 Antony Cedex, France
| | - Kim Anh Lê Cao
- Melbourne Integrative Genomics, School of Mathematics and Statistics, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Francesc Puig-Castellví
- Université Paris-Saclay, INRAE, PROSE, 1 rue Pierre-Gilles de Gennes, CS 10030, 92761 Antony Cedex, France
- Université Paris-Saclay, INRAE, AgroParisTech, UMR SayFood, 75005 Paris, France
| | - Chrystelle Bureau
- Université Paris-Saclay, INRAE, PROSE, 1 rue Pierre-Gilles de Gennes, CS 10030, 92761 Antony Cedex, France
| | - Céline Madigou
- Acquisitions et Analyses de Données pour l’Histoire naturelle, 2AD—UMS 2700 CNRS MNHN, Muséum national d’Histoire naturelle, CP26, 57 rue Cuvier, 75231 Paris Cedex 05, France
| | - Laurent Mazéas
- Université Paris-Saclay, INRAE, PROSE, 1 rue Pierre-Gilles de Gennes, CS 10030, 92761 Antony Cedex, France
| | - Olivier Chapleur
- Université Paris-Saclay, INRAE, PROSE, 1 rue Pierre-Gilles de Gennes, CS 10030, 92761 Antony Cedex, France
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20
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Wang P, Peng H, Adhikari S, Higgins B, Roy P, Dai W, Shi X. Enhancement of biogas production from wastewater sludge via anaerobic digestion assisted with biochar amendment. BIORESOURCE TECHNOLOGY 2020; 309:123368. [PMID: 32330803 DOI: 10.1016/j.biortech.2020.123368] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 04/01/2020] [Accepted: 04/07/2020] [Indexed: 06/11/2023]
Abstract
Studies have shown that biochar enhances methane formation due to the presence of redox active moieties and its conductive properties. This study investigated the influence of biochar, which was produced from Douglas fir pyrolysis, on biogas production and microbial community during anaerobic digestion (AD) of wastewater sludge. The results showed that biochar significantly enhances methane (CH4) production rate and increases its final yield during AD. The cumulative highest CH4 production obtaining in cultures with DF500 (biochar from Douglas fir at 500 °C) were about 11% and 98% more than the culture without biochar at 37 °C and 25 °C AD temperature, respectively. At 55 °C, the maximum CH4 yield reached 172.3 ml/g COD with DF730, which was about 48.3% more than control culture. The microbial community analysis results showed that biochar could up-regulate the role of micro-ecology especially the methanogens and improve the AD process.
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Affiliation(s)
- Pixiang Wang
- Department of Biosystems Engineering, Auburn University, Auburn, AL 36849 USA
| | - Haixin Peng
- Department of Biosystems Engineering, Auburn University, Auburn, AL 36849 USA
| | - Sushil Adhikari
- Department of Biosystems Engineering, Auburn University, Auburn, AL 36849 USA; Center for Bioenergy and Bioproducts, Auburn University, Auburn, AL 36849 USA.
| | - Brendan Higgins
- Department of Biosystems Engineering, Auburn University, Auburn, AL 36849 USA
| | - Poulami Roy
- Department of Biosystems Engineering, Auburn University, Auburn, AL 36849 USA
| | - Wei Dai
- College of Marine Life Sciences, Ocean University of China, Qingdao 266100, China
| | - Xiaochong Shi
- College of Marine Life Sciences, Ocean University of China, Qingdao 266100, China
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21
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Mironov VV, Bochkova EA, Gannesen AV, Vanteeva AV, Russkova YI, Nozhevnikova AN. Dynamics of Biological Processes during Composting of Anaerobically Digested Wastewater Sludge. Microbiology (Reading) 2020. [DOI: 10.1134/s0026261720040086] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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22
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Xu J, Bu F, Zhu W, Luo G, Xie L. Microbial Consortiums of Hydrogenotrophic Methanogenic Mixed Cultures in Lab-Scale Ex-Situ Biogas Upgrading Systems under Different Conditions of Temperature, pH and CO. Microorganisms 2020; 8:microorganisms8050772. [PMID: 32455626 PMCID: PMC7285331 DOI: 10.3390/microorganisms8050772] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 05/15/2020] [Accepted: 05/18/2020] [Indexed: 12/12/2022] Open
Abstract
In this study, hydrogenotrophic methanogenic mixed cultures taken from 13 lab-scale ex-situ biogas upgrading systems under different temperature (20–70 °C), pH (6.0–8.5), and CO (0–10%, v/v) variables were systematically investigated. High-throughput 16S rRNA gene sequencing was used to identify the microbial consortia, and statistical analyses were conducted to reveal the microbial diversity, the core functional microbes, and their correlative relationships with tested variables. Overall, bacterial community was more complex than the archaea community in all mixed cultures. Hydrogenotrophic methanogens Methanothermobacter, Methanobacterium, and Methanomassiliicoccus, and putative syntrophic acetate-oxidizing bacterium Coprothermobacter and Caldanaerobacter were found to predominate, but the core functional microbes varied under different conditions. Multivariable sensitivity analysis indicated that temperature (p < 0.01) was the crucial variable to determine the microbial consortium structures in hydrogenotrophic methanogenic mixed cultures. pH (0.01 < p < 0.05) significantly interfered with the relative abundance of dominant archaea. Although CO did not affect community (p > 0.1), some potential CO-utilizing syntrophic metabolisms might be enhanced. Understanding of microbial consortia in the hydrogenotrophic methanogenic mixed cultures related to environmental variables was a great advance to reveal the microbial ecology in microbial biogas upgrading process.
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Affiliation(s)
- Jun Xu
- The Yangtze River Water Environment Key Laboratory of the Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; (J.X.); (F.B.); (W.Z.)
| | - Fan Bu
- The Yangtze River Water Environment Key Laboratory of the Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; (J.X.); (F.B.); (W.Z.)
| | - Wenzhe Zhu
- The Yangtze River Water Environment Key Laboratory of the Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; (J.X.); (F.B.); (W.Z.)
| | - Gang Luo
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200092, China;
| | - Li Xie
- The Yangtze River Water Environment Key Laboratory of the Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; (J.X.); (F.B.); (W.Z.)
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
- Correspondence:
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23
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Assessment of the microbial interplay during anaerobic co-digestion of wastewater sludge using common components analysis. PLoS One 2020; 15:e0232324. [PMID: 32357180 PMCID: PMC7194399 DOI: 10.1371/journal.pone.0232324] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 04/12/2020] [Indexed: 12/29/2022] Open
Abstract
Anaerobic digestion (AD) is used to minimize solid waste while producing biogas by the action of microorganisms. To give an insight into the underlying microbial dynamics in anaerobic digesters, we investigated two different AD systems (wastewater sludge mixed with either fish or grass waste). The microbial activity was characterized by 16S RNA sequencing. 16S data is sparse and dispersed, and existent data analysis methods do not take into account this complexity nor the potential microbial interactions. In this line, we proposed a data pre-processing pipeline addressing these issues while not restricting only to the most abundant microorganisms. The data were analyzed by Common Components Analysis (CCA) to decipher the effect of substrate composition on the microorganisms. CCA results hinted the relationships between the microorganisms responding similarly to the AD physicochemical parameters. Thus, in overall, CCA allowed a better understanding of the inter-species interactions within microbial communities.
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24
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Zhang Q, Zhang L, Guo B, Liu Y. Mesophiles outperform thermophiles in the anaerobic digestion of blackwater with kitchen residuals: Insights into process limitations. WASTE MANAGEMENT (NEW YORK, N.Y.) 2020; 105:279-288. [PMID: 32092533 DOI: 10.1016/j.wasman.2020.02.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 02/11/2020] [Accepted: 02/13/2020] [Indexed: 06/10/2023]
Abstract
Co-digestion of blackwater (BW) and organic kitchen waste (KW) is a promising and effective resource-recovery based approach for municipal waste and wastewater treatment. In this study, anaerobic co-digestion treatments of BW and KW using anaerobic sequencing batch reactors under mesophilic and thermophilic conditions were compared. Our results showed that although higher sludge specific methanogenesis activities were observed in the thermophilic reactor, mesophilic treatment achieved significantly higher treatment capacity and methane production. It was concluded that thermophilic conditions introduced H2 inhibition and reduced activities of syntrophic acetogenic bacteria and syntrophic acetate oxidizing bacteria in the reactor. Further investigation on microbial communities showed significantly different microbial communities between reactors, where Thermotogaceae and Methanothermobacter were the most prevalent bacteria and archaea in the thermophilic reactor, and Cloacamonaceae and Methanosarcina were the most prevalent ones in the mesophilic reactor.
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Affiliation(s)
- Qianyi Zhang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Lei Zhang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Bing Guo
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Yang Liu
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada.
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25
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Lackner N, Wagner AO, Markt R, Illmer P. pH and Phosphate Induced Shifts in Carbon Flow and Microbial Community during Thermophilic Anaerobic Digestion. Microorganisms 2020; 8:E286. [PMID: 32093251 PMCID: PMC7074938 DOI: 10.3390/microorganisms8020286] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/14/2020] [Accepted: 02/17/2020] [Indexed: 01/11/2023] Open
Abstract
pH is a central environmental factor influencing CH4 production from organic substrates, as every member of the complex microbial community has specific pH requirements. Here, we show how varying pH conditions (5.0-8.5, phosphate buffered) and the application of a phosphate buffer per se induce shifts in the microbial community composition and the carbon flow during nine weeks of thermophilic batch digestion. Beside monitoring the methane production as well as volatile fatty acid concentrations, amplicon sequencing of the 16S rRNA gene was conducted. The presence of 100 mM phosphate resulted in reduced CH4 production during the initial phase of the incubation, which was characterized by a shift in the dominant methanogenic genera from a mixed Methanosarcina and Methanoculleus to a pure Methanoculleus system. In buffered samples, acetate strongly accumulated in the beginning of the batch digestion and subsequently served as a substrate for methanogens. Methanogenesis was permanently inhibited at pH values ≤5.5, with the maximum CH4 production occurring at pH 7.5. Adaptations of the microbial community to the pH variations included shifts in the archaeal and bacterial composition, as less competitive organisms with a broad pH range were able to occupy metabolic niches at unfavorable pH conditions.
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Affiliation(s)
- Nina Lackner
- Department of Microbiology, Universität Innsbruck, 6020 Innsbruck, Austria; (A.O.W.); (R.M.); (P.I.)
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26
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Dessì P, Chatterjee P, Mills S, Kokko M, Lakaniemi AM, Collins G, Lens PNL. Power production and microbial community composition in thermophilic acetate-fed up-flow and flow-through microbial fuel cells. BIORESOURCE TECHNOLOGY 2019; 294:122115. [PMID: 31541978 DOI: 10.1016/j.biortech.2019.122115] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 08/31/2019] [Accepted: 09/03/2019] [Indexed: 06/10/2023]
Abstract
The microbial communities developed from a mixed-species culture in up-flow and flow-through configurations of thermophilic (55 °C) microbial fuel cells (MFCs), and their power production from acetate, were investigated. The up-flow MFC was operated for 202 days, obtaining an average power density of 0.13 W/m3, and Tepidiphilus was the dominant transcriptionally-active microorganisms. The planktonic community developed in the up-flow MFC was used to inoculate a flow-through MFC resulting in the proliferation of Ureibacillus, whose relative abundance increased from 1 to 61% after 45 days. Despite the differences between the up-flow and flow-through MFCs, including the anode electrode, hydrodynamic conditions, and the predominant microorganism, similar (p = 0.05) volumetric power (0.11-0.13 W/m3), coulombic efficiency (16-18%) and acetate consumption rates (55-69 mg/L/d) were obtained from both. This suggests that though MFC design can shape the active component of the thermophilic microbial community, the consortia are resilient and can maintain similar performance in different MFC configurations.
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Affiliation(s)
- Paolo Dessì
- Tampere University, Faculty of Engineering and Natural Sciences, P.O. Box 541, FI-33104 Tampere University, Finland; National University of Ireland Galway, University Road, Galway H91 TK33, Ireland.
| | - Pritha Chatterjee
- Tampere University, Faculty of Engineering and Natural Sciences, P.O. Box 541, FI-33104 Tampere University, Finland; Department of Civil Engineering, Indian Institute of Technology Hyderabad, India
| | - Simon Mills
- Microbial Communities Laboratory, School of Natural Sciences, National University of Ireland Galway, University Road, Galway H91 TK33, Ireland
| | - Marika Kokko
- Tampere University, Faculty of Engineering and Natural Sciences, P.O. Box 541, FI-33104 Tampere University, Finland
| | - Aino-Maija Lakaniemi
- Tampere University, Faculty of Engineering and Natural Sciences, P.O. Box 541, FI-33104 Tampere University, Finland
| | - Gavin Collins
- Microbial Communities Laboratory, School of Natural Sciences, National University of Ireland Galway, University Road, Galway H91 TK33, Ireland
| | - Piet N L Lens
- Tampere University, Faculty of Engineering and Natural Sciences, P.O. Box 541, FI-33104 Tampere University, Finland; National University of Ireland Galway, University Road, Galway H91 TK33, Ireland
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27
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Oosterkamp MJ, Bauer S, Ibáñez AB, Méndez-García C, Hong PY, Cann I, Mackie RI. Identification of methanogenesis and syntrophy as important microbial metabolic processes for optimal thermophilic anaerobic digestion of energy cane thin stillage. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2019.100254] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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28
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Zamorano-López N, Greses S, Aguado D, Seco A, Borrás L. Thermophilic anaerobic conversion of raw microalgae: Microbial community diversity in high solids retention systems. ALGAL RES 2019. [DOI: 10.1016/j.algal.2019.101533] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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29
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Ryue J, Lin L, Liu Y, Lu W, McCartney D, Dhar BR. Comparative effects of GAC addition on methane productivity and microbial community in mesophilic and thermophilic anaerobic digestion of food waste. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.03.010] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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30
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Performance and Microbial Community Dynamics in Anaerobic Digestion of Waste Activated Sludge: Impact of Immigration. ENERGIES 2019. [DOI: 10.3390/en12030573] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Waste activated sludge (WAS) is a byproduct of municipal wastewater treatment. WAS contains a large proportion of inactive microbes, so when it is used as a substrate for anaerobic digestion (AD), their presence can interfere with monitoring of active microbial populations. To investigate how influent cells affect the active and inactive microbial communities during digestion of WAS, we operated model mesophilic bioreactors with conventional conditions. Under six different hydraulic retention times (HRTs; 25, 23, 20, 17, 14, and 11.5 d), the chemical oxygen demand (COD) removal and CH4 production of the AD were within a typical range for mesophilic sludge digesters. In the main bacteria were proteobacteria, bacteroidetes, and firmicutes in both the WAS and the bioreactors, while in main archaeal methanogen group was Methanosarcinales in the WAS and methanomicrobiales in the bioreactors. Of the 106 genera identified, the estimated net growth rates were negative in 72 and positive in 34. The genera with negative growth included many aerobic taxa. The genera with positive growth rates included methanogens and syntrophs. In some taxa, the net growth rate could be positive or negative, depending on HRT, so their abundance was also affected by HRT. This study gives insights into the microbial dynamics of a conventional sludge anaerobic digester by distinguishing potentially active (growing) and inactive (non-growing, dormant) microbes and by correlating population dynamics with process parameters.
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31
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Roy A, Sar P, Sarkar J, Dutta A, Sarkar P, Gupta A, Mohapatra B, Pal S, Kazy SK. Petroleum hydrocarbon rich oil refinery sludge of North-East India harbours anaerobic, fermentative, sulfate-reducing, syntrophic and methanogenic microbial populations. BMC Microbiol 2018; 18:151. [PMID: 30348104 PMCID: PMC6198496 DOI: 10.1186/s12866-018-1275-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 09/28/2018] [Indexed: 11/29/2022] Open
Abstract
Background Sustainable management of voluminous and hazardous oily sludge produced by petroleum refineries remains a challenging problem worldwide. Characterization of microbial communities of petroleum contaminated sites has been considered as the essential prerequisite for implementation of suitable bioremediation strategies. Three petroleum refinery sludge samples from North Eastern India were analyzed using next-generation sequencing technology to explore the diversity and functional potential of inhabitant microorganisms and scope for their on-site bioremediation. Results All sludge samples were hydrocarbon rich, anaerobic and reduced with sulfate as major anion and several heavy metals. High throughput sequencing of V3-16S rRNA genes from sludge metagenomes revealed dominance of strictly anaerobic, fermentative, thermophilic, sulfate-reducing bacteria affiliated to Coprothermobacter, Fervidobacterium, Treponema, Syntrophus, Thermodesulfovibrio, Anaerolinea, Syntrophobacter, Anaerostipes, Anaerobaculum, etc., which have been well known for hydrocarbon degradation. Relatively higher proportions of archaea were detected by qPCR. Archaeal 16S rRNA gene sequences showed presence of methanogenic Methanobacterium, Methanosaeta, Thermoplasmatales, etc. Detection of known hydrocarbon utilizing aerobic/facultative anaerobic (Mycobacterium, Pseudomonas, Longilinea, Geobacter, etc.), nitrate reducing (Gordonia, Novosphigobium, etc.) and nitrogen fixing (Azovibrio, Rhodobacter, etc.) bacteria suggested niche specific guilds with aerobic, facultative anaerobic and strict anaerobic populations. Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt) predicted putative genetic repertoire of sludge microbiomes and their potential for hydrocarbon degradation; lipid-, nitrogen-, sulfur- and methane- metabolism. Methyl coenzyme M reductase A (mcrA) and dissimilatory sulfite reductase beta-subunit (dsrB) genes phylogeny confirmed methanogenic and sulfate-reducing activities within sludge environment endowed by hydrogenotrophic methanogens and sulfate-reducing Deltaproteobacteria and Firmicutes members. Conclusion Refinery sludge microbiomes were comprised of hydrocarbon degrading, fermentative, sulfate-reducing, syntrophic, nitrogen fixing and methanogenic microorganisms, which were in accordance with the prevailing physicochemical nature of the samples. Analysis of functional biomarker genes ascertained the activities of methanogenic and sulfate-reducing organisms within sludge environment. Overall data provided better insights on microbial diversity and activity in oil contaminated environment, which could be exploited suitably for in situ bioremediation of refinery sludge. Electronic supplementary material The online version of this article (10.1186/s12866-018-1275-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ajoy Roy
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur, WB, 713 209, India
| | - Pinaki Sar
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, WB, 721 302, India
| | - Jayeeta Sarkar
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, WB, 721 302, India
| | - Avishek Dutta
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, WB, 721 302, India.,School of Bioscience, Indian Institute of Technology Kharagpur, Kharagpur, WB, 721 302, India
| | - Poulomi Sarkar
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, WB, 721 302, India
| | - Abhishek Gupta
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, WB, 721 302, India
| | - Balaram Mohapatra
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, WB, 721 302, India
| | - Siddhartha Pal
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur, WB, 713 209, India
| | - Sufia K Kazy
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur, WB, 713 209, India.
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32
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Šafarič L, Shakeri Yekta S, Liu T, Svensson BH, Schnürer A, Bastviken D, Björn A. Dynamics of a Perturbed Microbial Community during Thermophilic Anaerobic Digestion of Chemically Defined Soluble Organic Compounds. Microorganisms 2018; 6:microorganisms6040105. [PMID: 30314333 PMCID: PMC6313639 DOI: 10.3390/microorganisms6040105] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 10/06/2018] [Accepted: 10/10/2018] [Indexed: 11/22/2022] Open
Abstract
Knowledge of microbial community dynamics in relation to process perturbations is fundamental to understand and deal with the instability of anaerobic digestion (AD) processes. This study aims to investigate the microbial community structure and function of a thermophilic AD process, fed with a chemically defined substrate, and its association with process performance stability. Next generation amplicon sequencing of 16S ribosomal RNA (rRNA) genes revealed that variations in relative abundances of the predominant bacterial species, Defluviitoga tunisiensis and Anaerobaculum hydrogeniformans, were not linked to the process performance stability, while dynamics of bacterial genera of low abundance, Coprothermobacter and Defluviitoga (other than D. tunisiensis), were associated with microbial community function and process stability. A decrease in the diversity of the archaeal community was observed in conjunction with process recovery and stable performance, implying that the high abundance of specific archaeal group(s) contributed to the stable AD. Dominance of hydrogenotrophic Methanoculleus particularly corresponded to an enhanced microbial acetate and propionate turnover capacity, whereas the prevalence of hydrogenotrophic Methanothermobacter and acetoclastic Methanosaeta was associated with instable AD. Acetate oxidation via syntrophic interactions between Coprothermobacter and Methanoculleus was potentially the main methane-formation pathway during the stable process. We observed that supplementation of Se and W to the medium improved the propionate turnover by the thermophilic consortium. The outcomes of our study provided insights into the community dynamics and trace element requirements in relation to the process performance stability of thermophilic AD.
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Affiliation(s)
- Luka Šafarič
- Department of Thematic Studies-Environmental Change, Linköping University, 581 83 Linköping, Sweden.
- Biogas Research Center, Linköping University, 581 83 Linköping, Sweden.
| | - Sepehr Shakeri Yekta
- Department of Thematic Studies-Environmental Change, Linköping University, 581 83 Linköping, Sweden.
- Biogas Research Center, Linköping University, 581 83 Linköping, Sweden.
| | - Tong Liu
- Department of Molecular Science, Swedish University of Agricultural Science, Uppsala BioCenter, 75007 Uppsala, Sweden.
| | - Bo H Svensson
- Department of Thematic Studies-Environmental Change, Linköping University, 581 83 Linköping, Sweden.
- Biogas Research Center, Linköping University, 581 83 Linköping, Sweden.
| | - Anna Schnürer
- Department of Thematic Studies-Environmental Change, Linköping University, 581 83 Linköping, Sweden.
- Biogas Research Center, Linköping University, 581 83 Linköping, Sweden.
- Department of Molecular Science, Swedish University of Agricultural Science, Uppsala BioCenter, 75007 Uppsala, Sweden.
| | - David Bastviken
- Department of Thematic Studies-Environmental Change, Linköping University, 581 83 Linköping, Sweden.
| | - Annika Björn
- Department of Thematic Studies-Environmental Change, Linköping University, 581 83 Linköping, Sweden.
- Biogas Research Center, Linköping University, 581 83 Linköping, Sweden.
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Bu F, Dong N, Kumar Khanal S, Xie L, Zhou Q. Effects of CO on hydrogenotrophic methanogenesis under thermophilic and extreme-thermophilic conditions: Microbial community and biomethanation pathways. BIORESOURCE TECHNOLOGY 2018; 266:364-373. [PMID: 29982059 DOI: 10.1016/j.biortech.2018.03.092] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/16/2018] [Accepted: 03/18/2018] [Indexed: 06/08/2023]
Abstract
Coke oven gas is considered as a potential hydrogen source for biogas bio-upgrading. In this study, the effects of CO on biomethanation performance and microbial community structure of hydrogenotrophic mixed cultures were investigated under thermophilic (55 °C) and extreme-thermophilic (70 °C) conditions. 5% (v/v) CO did not inhibit hydrogenotrophic methanogenesis during semi-continuous operation, and 83-97% CO conversion to CH4 was achieved. Methanothermobacter thermoautotrophicus was the dominant methanogen at both temperatures and was the main functional archaea associated with CO biomethanation. Specific methanogenic activity test results showed that long-term 5% CO acclimation shortened the lag phase from 5 h to 1 h at 55 °C and 15 h to 3 h at 70 °C. CO2 was the preferred carbon source over CO for hydrogenotrophic methanogens and CO consumption only started when CO2 was completely depleted. M. thermoautotrophicus dominated mixed cultures showed a great potential in simultaneous hydrogenotrophic methanogenesis and CO biomethanation.
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Affiliation(s)
- Fan Bu
- State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China
| | - Nanshi Dong
- State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China
| | - Samir Kumar Khanal
- Department of Molecular Biosciences and Bioengineering (MBBE), University of Hawai'i at Mānoa, 1955 East-West Road, Agricultural Science Building 218, Honolulu, HI 96822, USA
| | - Li Xie
- State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China.
| | - Qi Zhou
- State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China
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34
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Arévalo-Arbeláez ÁJ, Bedoya-Urrego K, Cabarcas-Jaramillo F, Alzate-Restrepo JF. [Description of bacterial microbiota in biosolids generated in the San Fernando wastewater treatment plant. Itagüí, Colombia]. Rev Salud Publica (Bogota) 2018; 19:806-813. [PMID: 30183835 DOI: 10.15446/rsap.v19n6.67950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 09/03/2017] [Indexed: 11/09/2022] Open
Abstract
OBJECTIVE To describe bacterial microbiota in the biosolids generated in one of the largest wastewater treatment plants of Colombia. MATERIALS AND METHODS Using NGS technology, 16S rRNA Gene Amplicon libraries were amplified and sequenced. The Roche 454 FLX Titanium platform was used, while the V1-V3 and V6-V9 hypervariable regions were amplified and analyzed independently. Amplicon processing and bacterial classification were performed using the AmpliconNoise pipeline and the RDP Classifier tool. RESULTS The analysis showed that the most dominant Phyla in the biosolids were Chlo-roflexi, Proteobacteria, Bacteroidetes, Actinobacteria and Firmicutes. The most dominant genera were Pseudomonas, Dysgonomonas and Proteiniphilum; however, the dominant group according in the V1-V3 variable region was Anaerolineaceae, which does not conform to the species described for this family. Pathogenic bacteria such as Salmonella and E. coli/Shigella were not detected in the studied biosolid sample. CONCLUSIONS In the biosolids samples analyzed, environmental bacteria involved in organic matter stabilization processes during secondary biological treatments and anaerobic digestion were predominant. One of the dominant species in this sludge is a novel species of the Anaerolineaceae group. At the time of the study, it was found that the anaerobic digester system was able to maintain pathogenic bacteria at very low concentrations.
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Affiliation(s)
- Ángela J Arévalo-Arbeláez
- AA: Microbióloga. M. Sc. Grupo de Parasitologia, Centro Nacional de Secuenciación Ge-nómica, Facultad de Medicina, Sede de Investigación Universitaria-SIU, Universidad de Antioquia. Medellín, Colombia.
| | - Katherine Bedoya-Urrego
- KB: Microbióloga. M. Sc. Parasitologia, Centro Nacional de Secuenciación Genómica, Facultad de Medicina, Sede de Investigación Universitaria-SIU, Universidad de Antioquia. Medellín, Colombia.
| | - Felipe Cabarcas-Jaramillo
- FC: Ing. Electrónico. Ph. D., M. Sc. Grupo Sistemic, Centro Nacional de Secuenciación Genómica, Facultad de Ingeniería, Sede de Investigación Universitaria-SIU, Universidad de Antioquia. Medellín, Colombia.
| | - Juan F Alzate-Restrepo
- JA: Bacteriólogo. Ph. D., M. Sc. Grupo de Parasitología, Centro Nacional de Secuenciación Genómica, Facultad de Medicina, Sede de Investigación Universitaria-SIU, Universidad de Antioquia. Medellín, Colombia.
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35
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Pavan ME, Pavan EE, Glaeser SP, Etchebehere C, Kämpfer P, Pettinari MJ, López NI. Proposal for a new classification of a deep branching bacterial phylogenetic lineage: transfer of Coprothermobacter proteolyticus and Coprothermobacter platensis to Coprothermobacteraceae fam. nov., within Coprothermobacterales ord. nov., Coprothermobacteria classis nov. and Coprothermobacterota phyl. nov. and emended description of the family Thermodesulfobiaceae. Int J Syst Evol Microbiol 2018; 68:1627-1632. [PMID: 29595416 DOI: 10.1099/ijsem.0.002720] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The genus Coprothermobacter (initially named Thermobacteroides) is currently placed within the phylum Firmicutes. Early 16S rRNA gene based phylogenetic studies pointed out the great differences between Coprothermobacter and other members of the Firmicutes, revealing that it constitutes a new deep branching lineage. Over the years, several studies based on 16S rRNA gene and whole genome sequences have indicated that Coprothermobacter is very distant phylogenetically to all other bacteria, supporting its placement in a distinct deeply rooted novel phylum. In view of this, we propose its allocation to the new family Coprothermobacteraceae within the novel order Coprothermobacterales, the new class Coprothermobacteria, and the new phylum Coprothermobacterota, and an emended description of the family Thermodesulfobiaceae.
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Affiliation(s)
- María Elisa Pavan
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Esteban E Pavan
- Biomedical Technologies Laboratory, Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milan, Italy
| | - Stefanie P Glaeser
- Institut für Angewandte Mikrobiologie, Universität Giessen, Giessen, Germany
| | - Claudia Etchebehere
- Microbial Ecology Laboratory, Department of Biochemistry and Microbial Genetics, Biological Research Institute "Clemente Estable", Montevideo, Uruguay
| | - Peter Kämpfer
- Institut für Angewandte Mikrobiologie, Universität Giessen, Giessen, Germany
| | - María Julia Pettinari
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina.,IQUIBICEN-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Nancy I López
- IQUIBICEN-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina.,Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
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36
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Dessì P, Porca E, Haavisto J, Lakaniemi AM, Collins G, Lens PNL. Composition and role of the attached and planktonic microbial communities in mesophilic and thermophilic xylose-fed microbial fuel cells. RSC Adv 2018; 8:3069-3080. [PMID: 35541202 PMCID: PMC9077550 DOI: 10.1039/c7ra12316g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 01/08/2018] [Indexed: 11/21/2022] Open
Abstract
A mesophilic (37 °C) and a thermophilic (55 °C) two-chamber microbial fuel cell (MFC) were studied and compared for their power production from xylose and the anode-attached, membrane-attached and planktonic microbial communities involved.
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Affiliation(s)
- Paolo Dessì
- Laboratory of Chemistry and Bioengineering
- Tampere University of Technology
- FI-33101 Tampere
- Finland
| | - Estefania Porca
- Microbial Communities Laboratory
- School of Natural Sciences
- National University of Ireland Galway
- Galway
- Ireland
| | - Johanna Haavisto
- Laboratory of Chemistry and Bioengineering
- Tampere University of Technology
- FI-33101 Tampere
- Finland
| | - Aino-Maija Lakaniemi
- Laboratory of Chemistry and Bioengineering
- Tampere University of Technology
- FI-33101 Tampere
- Finland
| | - Gavin Collins
- Microbial Communities Laboratory
- School of Natural Sciences
- National University of Ireland Galway
- Galway
- Ireland
| | - Piet N. L. Lens
- Laboratory of Chemistry and Bioengineering
- Tampere University of Technology
- FI-33101 Tampere
- Finland
- UNESCO-IHE
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Cho K, Shin SG, Kim W, Lee J, Lee C, Hwang S. Microbial community shifts in a farm-scale anaerobic digester treating swine waste: Correlations between bacteria communities associated with hydrogenotrophic methanogens and environmental conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 601-602:167-176. [PMID: 28551535 DOI: 10.1016/j.scitotenv.2017.05.188] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 05/19/2017] [Accepted: 05/20/2017] [Indexed: 06/07/2023]
Abstract
Microbial community structure in a farm-scale anaerobic digester treating swine manure was investigated during three process events: 1) prolonged starvation, and changes of 2) operating temperature (between meso- and thermophilic) and 3) hydraulic retention time (HRT). Except during the initial period, the digester was dominated by hydrogenotrophic methanogens (HMs). The bacterial community structure significantly shifted with operating temperature and HRT but not with long-term starvation. Clostridiales (26.5-54.4%) and Bacteroidales (2.5-13.7%) became dominant orders in the digester during the period of HM dominance. Abundance of diverse meso- and thermophilic bacteria increased during the same period; many of these species may be H2 producers, and/or syntrophic acetate oxidizers. Some of these species showed positive correlations with [NH4+-N] (p<0.1); this relationship suggests that ammonia was a significant parameter for bacterial selection. The bacterial niche information reported in this study can be useful to understand the ecophysiology of anaerobic digesters treating swine manure that contains high ammonia content.
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Affiliation(s)
- Kyungjin Cho
- Center for Water Resource Cycle Research, Korea Institute of Science and Technology, 39-1 Hawolgok-Dong, Seongbuk-Gu, Seoul 136-791, Republic of Korea
| | - Seung Gu Shin
- School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Republic of Korea.
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Joonyeob Lee
- School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Republic of Korea
| | - Changsoo Lee
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 689-798, Republic of Korea
| | - Seokhwan Hwang
- School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Republic of Korea.
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Fitamo T, Treu L, Boldrin A, Sartori C, Angelidaki I, Scheutz C. Microbial population dynamics in urban organic waste anaerobic co-digestion with mixed sludge during a change in feedstock composition and different hydraulic retention times. WATER RESEARCH 2017; 118:261-271. [PMID: 28456109 DOI: 10.1016/j.watres.2017.04.012] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 03/22/2017] [Accepted: 04/04/2017] [Indexed: 05/27/2023]
Abstract
Microbial communities play an essential role in the biochemical pathways of anaerobic digestion processes. The correlations between microorganisms' relative abundance and anaerobic digestion process parameters were investigated, by considering the effect of different feedstock compositions and hydraulic retention times (HRTs). Shifts in microbial diversity and changes in microbial community richness were observed by changing feedstock composition from mono-digestion of mixed sludge to co-digestion of food waste, grass clippings and garden waste with mixed sludge at HRT of 30, 20, 15 and 10 days. Syntrophic acetate oxidation along with hydrogenotrophic methanogenesis, mediated by Methanothermobacter, was found to be the most prevalent methane formation pathway, with the only exception of 10 days' HRT, in which Methanosarcina was the most dominant archaea. Significantly, the degradation of complex organic polymers was found to be the most active process, performed by members of S1 (Thermotogales), Thermonema and Lactobacillus in a reactor fed with a high share of food waste. Conversely, Thermacetogenium, Anaerobaculum, Ruminococcaceae, Porphyromonadaceae and the lignocellulosic-degrading Clostridium were the significantly more abundant bacteria in the reactor fed with an increased share of lignocellulosic biomass in the form of grass clippings and garden waste. Finally, microbes belonging to Coprothermobacter, Syntrophomonas and Clostridium were correlated significantly with the specific methane yield obtained in both reactors.
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Affiliation(s)
- Temesgen Fitamo
- Department of Environmental Engineering, Technical University of Denmark, Miljoevej, Building 115, DK-2800, Kongens Lyngby, Denmark.
| | - Laura Treu
- Department of Environmental Engineering, Technical University of Denmark, Miljoevej, Building 115, DK-2800, Kongens Lyngby, Denmark; Department of Agronomy, Food, Natural Resources, Animal and Environment (DAFNAE), viale dell'Università, 16, 35020, Legnaro, Padova, Italy
| | - Alessio Boldrin
- Department of Environmental Engineering, Technical University of Denmark, Miljoevej, Building 115, DK-2800, Kongens Lyngby, Denmark
| | - Cristina Sartori
- Department of Agronomy, Food, Natural Resources, Animal and Environment (DAFNAE), viale dell'Università, 16, 35020, Legnaro, Padova, Italy
| | - Irini Angelidaki
- Department of Environmental Engineering, Technical University of Denmark, Miljoevej, Building 115, DK-2800, Kongens Lyngby, Denmark
| | - Charlotte Scheutz
- Department of Environmental Engineering, Technical University of Denmark, Miljoevej, Building 115, DK-2800, Kongens Lyngby, Denmark
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de Jonge N, Moset V, Møller HB, Nielsen JL. Microbial population dynamics in continuous anaerobic digester systems during start up, stable conditions and recovery after starvation. BIORESOURCE TECHNOLOGY 2017; 232:313-320. [PMID: 28242388 DOI: 10.1016/j.biortech.2017.02.036] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 02/06/2017] [Accepted: 02/08/2017] [Indexed: 06/06/2023]
Abstract
The evolution and population dynamics of complex anaerobic microbial communities in anaerobic digesters were investigated during stable operation and recovery after prolonged starvation. Three thermophilic reactor systems fed with cattle manure were operated continuously in parallel for 167days. Significant changes in the microbial communities were observed for both the bacterial and archaeal populations as the reactor systems were subjected to changing feeding regimes. The ecosystems developed from being relatively similar in structure to more specialised communities, with large population shifts within the acetogenic and methanogenic communities, which appeared to shift towards the hydrogenotrophic methanogenesis pathway. All reactor systems showed signs of adaptation to a harsher environment under high VFA, H2S and ammonia concentrations, but remained at a lower degree of stability after 45days of recovery compared to stable period of operation before starvation.
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Affiliation(s)
- Nadieh de Jonge
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark
| | - Veronica Moset
- Department of Engineering, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark
| | - Henrik Bjarne Møller
- Department of Engineering, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark
| | - Jeppe Lund Nielsen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark.
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Hagen LH, Frank JA, Zamanzadeh M, Eijsink VGH, Pope PB, Horn SJ, Arntzen MØ. Quantitative Metaproteomics Highlight the Metabolic Contributions of Uncultured Phylotypes in a Thermophilic Anaerobic Digester. Appl Environ Microbiol 2017; 83:e01955-16. [PMID: 27815274 PMCID: PMC5203625 DOI: 10.1128/aem.01955-16] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 10/31/2016] [Indexed: 01/23/2023] Open
Abstract
In this study, we used multiple meta-omic approaches to characterize the microbial community and the active metabolic pathways of a stable industrial biogas reactor with food waste as the dominant feedstock, operating at thermophilic temperatures (60°C) and elevated levels of free ammonia (367 mg/liter NH3-N). The microbial community was strongly dominated (76% of all 16S rRNA amplicon sequences) by populations closely related to the proteolytic bacterium Coprothermobacter proteolyticus. Multiple Coprothermobacter-affiliated strains were detected, introducing an additional level of complexity seldom explored in biogas studies. Genome reconstructions provided metabolic insight into the microbes that performed biomass deconstruction and fermentation, including the deeply branching phyla Dictyoglomi and Planctomycetes and the candidate phylum "Atribacteria" These biomass degraders were complemented by a synergistic network of microorganisms that convert key fermentation intermediates (fatty acids) via syntrophic interactions with hydrogenotrophic methanogens to ultimately produce methane. Interpretation of the proteomics data also suggested activity of a Methanosaeta phylotype acclimatized to high ammonia levels. In particular, we report multiple novel phylotypes proposed as syntrophic acetate oxidizers, which also exert expression of enzymes needed for both the Wood-Ljungdahl pathway and β-oxidation of fatty acids to acetyl coenzyme A. Such an arrangement differs from known syntrophic oxidizing bacteria and presents an interesting hypothesis for future studies. Collectively, these findings provide increased insight into active metabolic roles of uncultured phylotypes and presents new synergistic relationships, both of which may contribute to the stability of the biogas reactor. IMPORTANCE Biogas production through anaerobic digestion of organic waste provides an attractive source of renewable energy and a sustainable waste management strategy. A comprehensive understanding of the microbial community that drives anaerobic digesters is essential to ensure stable and efficient energy production. Here, we characterize the intricate microbial networks and metabolic pathways in a thermophilic biogas reactor. We discuss the impact of frequently encountered microbial populations as well as the metabolism of newly discovered novel phylotypes that seem to play distinct roles within key microbial stages of anaerobic digestion in this stable high-temperature system. In particular, we draft a metabolic scenario whereby multiple uncultured syntrophic acetate-oxidizing bacteria are capable of syntrophically oxidizing acetate as well as longer-chain fatty acids (via the β-oxidation and Wood-Ljundahl pathways) to hydrogen and carbon dioxide, which methanogens subsequently convert to methane.
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Affiliation(s)
- Live H Hagen
- Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences (NMBU), Ås, Norway
| | - Jeremy A Frank
- Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences (NMBU), Ås, Norway
| | - Mirzaman Zamanzadeh
- Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences (NMBU), Ås, Norway
| | - Vincent G H Eijsink
- Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences (NMBU), Ås, Norway
| | - Phillip B Pope
- Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences (NMBU), Ås, Norway
| | - Svein J Horn
- Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences (NMBU), Ås, Norway
| | - Magnus Ø Arntzen
- Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences (NMBU), Ås, Norway
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41
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Gaby JC, Zamanzadeh M, Horn SJ. The effect of temperature and retention time on methane production and microbial community composition in staged anaerobic digesters fed with food waste. BIOTECHNOLOGY FOR BIOFUELS 2017; 10:302. [PMID: 29255485 PMCID: PMC5729454 DOI: 10.1186/s13068-017-0989-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 12/02/2017] [Indexed: 05/21/2023]
Abstract
BACKGROUND Food waste is a large bio-resource that may be converted to biogas that can be used for heat and power production, or as transport fuel. We studied the anaerobic digestion of food waste in a staged digestion system consisting of separate acidogenic and methanogenic reactor vessels. Two anaerobic digestion parameters were investigated. First, we tested the effect of 55 vs. 65 °C acidogenic reactor temperature, and second, we examined the effect of reducing the hydraulic retention time (HRT) from 17 to 10 days in the methanogenic reactor. Process parameters including biogas production were monitored, and the microbial community composition was characterized by 16S amplicon sequencing. RESULTS Neither organic matter removal nor methane production were significantly different for the 55 and 65 °C systems, despite the higher acetate and butyrate concentrations observed in the 65 °C acidogenic reactor. Ammonium levels in the methanogenic reactors were about 950 mg/L NH4+ when HRT was 17 days but were reduced to 550 mg/L NH4+ at 10 days HRT. Methane production increased from ~ 3600 mL/day to ~ 7800 when the HRT was decreased. Each reactor had unique environmental parameters and a correspondingly unique microbial community. In fact, the distinct values in each reactor for just two parameters, pH and ammonium concentration, recapitulate the separation seen in microbial community composition. The thermophilic and mesophilic digesters were particularly distinct from one another. The 55 °C acidogenic reactor was mainly dominated by Thermoanaerobacterium and Ruminococcus, whereas the 65 °C acidogenic reactor was initially dominated by Thermoanaerobacterium but later was overtaken by Coprothermobacter. The acidogenic reactors were lower in diversity (34-101 observed OTU0.97, 1.3-2.5 Shannon) compared to the methanogenic reactors (472-513 observed OTU0.97, 5.1-5.6 Shannon). The microbial communities in the acidogenic reactors were > 90% Firmicutes, and the Euryarchaeota were higher in relative abundance in the methanogenic reactors. CONCLUSIONS The digestion systems had similar biogas production and COD removal rates, and hence differences in temperature, NH4+ concentration, and pH in the reactors resulted in distinct but similarly functioning microbial communities over this range of operating parameters. Consequently, one could reduce operational costs by lowering both the hydrolysis temperature from 65 to 55 °C and the HRT from 17 to 10 days.
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Affiliation(s)
- John Christian Gaby
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
| | - Mirzaman Zamanzadeh
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, P.O. Box 14155-6446, Tehran, Iran
- Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
| | - Svein Jarle Horn
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
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Shin SG, Koo T, Lee J, Han G, Cho K, Kim W, Hwang S. Correlations between bacterial populations and process parameters in four full-scale anaerobic digesters treating sewage sludge. BIORESOURCE TECHNOLOGY 2016; 214:711-721. [PMID: 27209453 DOI: 10.1016/j.biortech.2016.05.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 05/04/2016] [Accepted: 05/08/2016] [Indexed: 06/05/2023]
Abstract
Process parameters and bacterial populations were investigated in four full-scale anaerobic digesters treating sewage sludge. Although the four digesters were operated under similar conditions, digesters A and B had higher pH (7.2-7.4) and lipid removal efficiencies (>50%) than C and D (pH 6.1-6.4; average lipid removal <16%). Bacterial richness, diversity, and evenness were higher in digesters C and D. Among the top-populated genera, ten (group I) were more abundant in digesters A and/or B; they were putative syntrophic fatty acid or protein/amino acid-utilizers. In contrast, fifteen others (group II) were less abundant in A and/or B and included potentially dormant/dead cells originated from activated sludge. Despite the overall richness trend, the presence of the 25 genera in groups I/II was greater in digesters A and B (24) than in C and D (17); this observation suggests that group I bacteria might be essential in AD of sewage sludge.
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Affiliation(s)
- Seung Gu Shin
- School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, South Korea
| | - Taewoan Koo
- School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, South Korea
| | - Joonyeob Lee
- School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, South Korea
| | - Gyuseong Han
- School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, South Korea
| | - Kyungjin Cho
- Center for Water Resource Cycle Research, Korea Institute of Science and Technology, Seoul, South Korea
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, Daegu, South Korea
| | - Seokhwan Hwang
- School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, South Korea.
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