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Gaspari M, Ghiotto G, Centurion VB, Kotsopoulos T, Santinello D, Campanaro S, Treu L, Kougias PG. Decoding Microbial Responses to Ammonia Shock Loads in Biogas Reactors through Metagenomics and Metatranscriptomics. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:591-602. [PMID: 38112274 PMCID: PMC10785759 DOI: 10.1021/acs.est.3c07840] [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: 09/21/2023] [Revised: 11/17/2023] [Accepted: 11/28/2023] [Indexed: 12/21/2023]
Abstract
The presence of elevated ammonia levels is widely recognized as a significant contributor to process inhibition in biogas production, posing a common challenge for biogas plant operators. The present study employed a combination of biochemical, genome-centric metagenomic and metatranscriptomic data to investigate the response of the biogas microbiome to two shock loads induced by single pulses of elevated ammonia concentrations (i.e., 1.5 g NH4+/LR and 5 g NH4+/LR). The analysis revealed a microbial community of high complexity consisting of 364 Metagenome Assembled Genomes (MAGs). The hydrogenotrophic pathway was the primary route for methane production during the entire experiment, confirming its efficiency even at high ammonia concentrations. Additionally, metatranscriptomic analysis uncovered a metabolic shift in the methanogens Methanothrix sp. MA6 and Methanosarcina flavescens MX5, which switched their metabolism from the acetoclastic to the CO2 reduction route during the second shock. Furthermore, multiple genes associated with mechanisms for maintaining osmotic balance in the cell were upregulated, emphasizing the critical role of osmoprotection in the rapid response to the presence of ammonia. Finally, this study offers insights into the transcriptional response of an anaerobic digestion community, specifically focusing on the mechanisms involved in recovering from ammonia-induced stress.
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Affiliation(s)
- Maria Gaspari
- Soil
and Water Resources Institute, Hellenic Agricultural Organisation
Dimitra, Thermi, Thessaloniki 57001, Greece
- Department
of Hydraulics, Soil Science and Agricultural Engineering, School of
Agriculture, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Gabriele Ghiotto
- Department
of Biology, University of Padova, Padova 35121, Italy
| | | | - Thomas Kotsopoulos
- Department
of Hydraulics, Soil Science and Agricultural Engineering, School of
Agriculture, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | | | | | - Laura Treu
- Department
of Biology, University of Padova, Padova 35121, Italy
| | - Panagiotis G. Kougias
- Soil
and Water Resources Institute, Hellenic Agricultural Organisation
Dimitra, Thermi, Thessaloniki 57001, Greece
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Fan L, Peng W, Duan H, Lü F, Zhang H, He P. Presence and role of viruses in anaerobic digestion of food waste under environmental variability. MICROBIOME 2023; 11:170. [PMID: 37537690 PMCID: PMC10401857 DOI: 10.1186/s40168-023-01585-z] [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: 08/18/2022] [Accepted: 05/28/2023] [Indexed: 08/05/2023]
Abstract
BACKGROUND The interaction among microorganisms in the anaerobic digestion of food waste (ADFW) reactors lead to the degradation of organics and the recycling of energy. Viruses are an important component of the microorganisms involved in ADFW, but are rarely investigated. Furthermore, little is known about how viruses affect methanogenesis. RESULTS Thousands of viral sequences were recovered from five full-scale ADFW reactors. Gene-sharing networks indicated that the ADFW samples contained substantial numbers of unexplored anaerobic-specific viruses. Moreover, the viral communities in five full-scale reactors exhibited both commonalities and heterogeneities. The lab-scale dynamic analysis of typical ADFW scenarios suggested that the viruses had similar kinetic characteristics to their prokaryotic hosts. By associating with putative hosts, a majority of the bacteria and archaea phyla were found to be infected by viruses. Viruses may influence prokaryotic ecological niches, and thus methanogenesis, by infecting key functional microorganisms, such as sulfate-reducing bacteria (SRB), syntrophic acetate-oxidizing bacteria (SAOB), and methanogens. Metabolic predictions for the viruses suggested that they may collaborate with hosts at key steps of sulfur and long-chain fatty acid (LCFA) metabolism and could be involved in typical methanogenesis pathways to participate in methane production. CONCLUSIONS Our results expanded the diversity of viruses in ADFW systems and suggested two ways that viral manipulated ADFW biochemical processes. Video Abstract.
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Affiliation(s)
- Lu Fan
- Institute of Waste Treatment and Reclamation, Tongji University, Shanghai, 200092, China
| | - Wei Peng
- Institute of Waste Treatment and Reclamation, Tongji University, Shanghai, 200092, China.
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China.
- Shanghai Engineering Research Center of Multi-Source Solid Wastes Co-processing and Energy Utilization, Shanghai, 200092, China.
| | - Haowen Duan
- Institute of Waste Treatment and Reclamation, Tongji University, Shanghai, 200092, China
| | - Fan Lü
- Institute of Waste Treatment and Reclamation, Tongji University, Shanghai, 200092, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China
- Shanghai Engineering Research Center of Multi-Source Solid Wastes Co-processing and Energy Utilization, Shanghai, 200092, China
| | - Hua Zhang
- Institute of Waste Treatment and Reclamation, Tongji University, Shanghai, 200092, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China
- Shanghai Engineering Research Center of Multi-Source Solid Wastes Co-processing and Energy Utilization, Shanghai, 200092, China
| | - Pinjing He
- Institute of Waste Treatment and Reclamation, Tongji University, Shanghai, 200092, China.
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China.
- Shanghai Engineering Research Center of Multi-Source Solid Wastes Co-processing and Energy Utilization, Shanghai, 200092, China.
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Yi Y, Dolfing J, Jin G, Fang X, Han W, Liu L, Tang Y, Cheng L. Thermodynamic restrictions determine ammonia tolerance of methanogenic pathways in Methanosarcina barkeri. WATER RESEARCH 2023; 232:119664. [PMID: 36775717 DOI: 10.1016/j.watres.2023.119664] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 01/20/2023] [Accepted: 01/21/2023] [Indexed: 06/18/2023]
Abstract
Ammonia is a ubiquitous potential inhibitor of anaerobic digestion processes, mainly exhibiting inhibition towards methanogenic activity. However, knowledge as to how ammonia affects the methanogens is still limited. In this study, we cultured a multitrophic methanogen, Methanosarcina barkeri DSM 800, with acetate, H2/CO2, and methanol to evaluate the influence of ammonia on different methanogenic pathways. Aceticlastic methanogenesis was more sensitive to increased ammonia concentrations than hydrogenotrophic and methylotrophic methanogenesis. Theoretical maximum NH3 tolerances of M. barkeri fed with acetate, H2/CO2, and methanol were calculated to be 39.1 ± 9.0, 104.3 ± 7.4, and 85.7 ± 1.0 mg/L, respectively. The order of the ΔG range of M. barkeri under three methanogenic pathways reflected the order of ammonia tolerance of M. barkeri. Our results provide insights into the role of the thermodynamic potential of methanogenesis on the tolerance of ammonia stress; and shed light on the mechanism of ammonia inhibition on anaerobic digestion.
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Affiliation(s)
- Yue Yi
- Key Laboratory of Development and Application of Rural Renewable Energy, Biogas Institute of Ministry of Agriculture and Rural Affairs, Section 4-13, Renmin South Road, Chengdu, Sichuan 610041, China; College of Architecture and Environment, Sichuan University, No. 24, South Section 1, First Ring Road, Chengdu, Sichuan 610065, China
| | - Jan Dolfing
- Faculty of Energy and Environment, Northumbria University, Wynne Jones 2.11, Ellison Place, Newcastle-upon-Tyne NE1 8QH, UK
| | - Ge Jin
- Key Laboratory of Development and Application of Rural Renewable Energy, Biogas Institute of Ministry of Agriculture and Rural Affairs, Section 4-13, Renmin South Road, Chengdu, Sichuan 610041, China
| | - XiaoYu Fang
- Key Laboratory of Development and Application of Rural Renewable Energy, Biogas Institute of Ministry of Agriculture and Rural Affairs, Section 4-13, Renmin South Road, Chengdu, Sichuan 610041, China
| | - WenHao Han
- Key Laboratory of Development and Application of Rural Renewable Energy, Biogas Institute of Ministry of Agriculture and Rural Affairs, Section 4-13, Renmin South Road, Chengdu, Sichuan 610041, China
| | - LaiYan Liu
- Key Laboratory of Development and Application of Rural Renewable Energy, Biogas Institute of Ministry of Agriculture and Rural Affairs, Section 4-13, Renmin South Road, Chengdu, Sichuan 610041, China
| | - YueQin Tang
- College of Architecture and Environment, Sichuan University, No. 24, South Section 1, First Ring Road, Chengdu, Sichuan 610065, China.
| | - Lei Cheng
- Key Laboratory of Development and Application of Rural Renewable Energy, Biogas Institute of Ministry of Agriculture and Rural Affairs, Section 4-13, Renmin South Road, Chengdu, Sichuan 610041, China.
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Ye M, Li YY. Methanogenic treatment of dairy wastewater: A review of current obstacles and new technological perspectives. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 866:161447. [PMID: 36621500 DOI: 10.1016/j.scitotenv.2023.161447] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/28/2022] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
Methanogenic treatment can effectively manage wastewater in the dairy industry. However, its treatment efficiency and stability are problematic due to the feature of wastewater. This review comprehensively summarizes the dairy wastewater characteristics and reveals the mechanisms and impacts of three critical issues in anaerobic treatment, including ammonia and long-chain fatty acid (LCFA) inhibition and trace metal (TM) deficiency. It evaluates current remedial strategies and the implementation of anaerobic membrane bioreactor (AnMBR) technology. It assesses the use of nitrogen-removed effluent return to dilute the influent for solving protein-rich dairy wastewater treatment. It explores the methodology of TM addition to dairy wastewater in accordance with microbial TM content and proliferation. It analyzes the multiple benefits of applying high-solid AnMBR to lipid-rich influent to mitigate LCFA inhibition. Finally, it proposes a promising low-carbon treatment system with enhanced bioenergy recovery, nitrogen removal, and simultaneous phosphorus recovery that could promote carbon neutrality for dairy industry wastewater treatment.
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Affiliation(s)
- Min Ye
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
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Ji X, Zhu K, Zhang Y, Ullah F, Li A, Zhang L. Mixed culture chain elongation for consumption of acetate and ethanol in anaerobic fermentation: The impact of salt type, dosage and acclimation. WASTE MANAGEMENT (NEW YORK, N.Y.) 2022; 152:48-58. [PMID: 35973327 DOI: 10.1016/j.wasman.2022.08.005] [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: 03/09/2022] [Revised: 07/18/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
Microbial chain elongation is a newly developed carboxylate platform-based bioprocess, which often encounters high salinity stress due to saline feedstock and pH adjustment. In this study, we systematically investigated the effects of salt types (Na+, K+, and NH4+), dosage, and salinity acclimation on microbial chain elongation, and identified the microbial community by high throughput 16S rRNA gene sequencing. The results showed that a high level of Na+ and NH4+ (12.5 g/L of cations) exerted seriously inhibitory effects without chain elongating activity, while K+ had the slightest inhibition only with a little longer lag phase and lower products yield. The chain elongating products yields and the selectivity of caproate decreased with the increasing Na+ concentration, and 8.6 g/L of Na+ was found to be the threshold value for un-acclimated inoculum used for chain elongation. The acclimation to high saline conditions greatly promoted the consumption of acetate and ethanol with a shorter lag phase, and recovered a robust elongating activity for butyrate production. Furthermore, the high throughput 16S rRNA gene sequencing analysis results indicated that six genera, such as Clostridium IV and Clostridium sensu stricto, closely relating chain elongation process were depressed by high salinity, and the salinity acclimation helped to enrich the functional microbes. These findings could provide useful information for engineering microbial chain elongation process under saline conditions.
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Affiliation(s)
- Xinran Ji
- Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China
| | - Kongyun Zhu
- Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China
| | - Yulin Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China
| | - Fahim Ullah
- Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China
| | - Aimin Li
- Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China
| | - Lei Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China.
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