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Valenzuela A, Ballestero D, Gan C, Lorca G, Langa E, Pino-Otín MR. Hydroquinone Ecotoxicity: Unveiling Risks in Soil and River Ecosystems with Insights into Microbial Resilience. TOXICS 2024; 12:115. [PMID: 38393210 PMCID: PMC10891836 DOI: 10.3390/toxics12020115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/22/2024] [Accepted: 01/23/2024] [Indexed: 02/25/2024]
Abstract
Despite widespread industrial use, the environmental safety of hydroquinone (HQ), a benzene compound from plants used in processes like cosmetics, remains uncertain. This study evaluated the ecotoxicological impact of HQ on soil and river environments, utilizing non-target indicator organisms from diverse trophic levels: Daphnia magna, Aliivibrio fischeri, Allium cepa, and Eisenia fetida. For a more environmentally realistic assessment, microbial communities from a river and untreated soil underwent 16S rRNA gene sequencing, with growth and changes in community-level physiological profiling assessed using Biolog EcoPlate™ assays. The water indicator D. magna exhibited the highest sensitivity to HQ (EC50 = 0.142 µg/mL), followed by A. fischeri (EC50 = 1.446 µg/mL), and A. cepa (LC50 = 7.631 µg/mL), while E. fetida showed the highest resistance (EC50 = 234 mg/Kg). Remarkably, microbial communities mitigated HQ impact in both aquatic and terrestrial environments. River microorganisms displayed minimal inhibition, except for a significant reduction in polymer metabolism at the highest concentration (100 µg/mL). Soil communities demonstrated resilience up to 100 µg/mL, beyond which there was a significant decrease in population growth and the capacity to metabolize carbohydrates and polymers. Despite microbial mitigation, HQ remains highly toxic to various trophic levels, emphasizing the necessity for environmental regulations.
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Affiliation(s)
| | | | | | | | | | - María Rosa Pino-Otín
- Faculty of Health Sciences, Universidad San Jorge, Villanueva de Gállego, 50830 Zaragoza, Spain; (A.V.); (D.B.); (C.G.); (G.L.); (E.L.)
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2
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Alves KJ, Pylro VS, Nakayama CR, Vital VG, Taketani RG, Santos DG, Mazza Rodrigues JL, Mui TS, Andreote FD. Methanogenic communities and methane emissions from enrichments of Brazilian Amazonia soils under land-use change. Microbiol Res 2022; 265:127178. [DOI: 10.1016/j.micres.2022.127178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 08/02/2021] [Accepted: 08/24/2022] [Indexed: 10/14/2022]
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3
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Stability of the Anaerobic Digestion Process during Switch from Parallel to Serial Operation—A Microbiome Study. SUSTAINABILITY 2022. [DOI: 10.3390/su14127161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Anaerobic digestion is a common procedure of treating sewage sludge at wastewater treatment plants. However, plants differ in terms of the number of reactors and, in case of several reactors, their operation mode. To confirm the flexibility of well adapted, full-scale anaerobic digestion plants, we monitored the physicochemical process conditions of two continuously stirred tank reactors over one hydraulic retention time before and after the operation mode was switched from parallel to serial operation. To investigate changes in the involved microbiota, we applied Illumina amplicon sequencing. The rapid change between operation modes did not affect the process performance. In both parallel and serial operation mode, we detected a highly diverse microbial community, in which Bacteroidetes, Firmicutes, Proteobacteria and Claocimonetes were high in relative abundance. While a prominent core microbiome was maintained in both configurations, changes in the involved microbiota were evident at a lower taxonomical level comparing both reactors and operation modes. The most prominent methanogenic Euryarchaeota detected were Methanosaeta and cand. Methanofastidiosum. Volatile fatty acids were degraded immediately in both reactors, suggesting that the second reactor could be used to produce methane on demand, by inserting easily degradable substrates.
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Isa MH, Bashir MJK, Wong LP. Anaerobic treatment of ultrasound pretreated palm oil mill effluent (POME): microbial diversity and enhancement of biogas production. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:44779-44793. [PMID: 35138542 DOI: 10.1007/s11356-022-19022-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 01/29/2022] [Indexed: 05/16/2023]
Abstract
In this study, palm oil mill effluent (POME) treated by ultrasonication at optimum conditions (sonication power: 0.88 W/mL, sonication duration: 16.2 min and total solids: 6% w/v) obtained from a previous study was anaerobically digested at different hydraulic retention times (HRTs). The reactor biomass was subjected to metagenomic study to investigate the impact on the anaerobic community dynamics. Experiments were conducted in two 5 L continuously stirred fill-and-draw reactors R1 and R2 operated at 30 ± 2 °C. Reactor R1 serving as control reactor was fed with unsonicated POME with HRT of 15 and 20 days (R1-15 and R1-20), whereas reactor R2 was fed with sonicated POME with the same HRTs (R2-15 and R2-20). The most distinct archaea community shift was observed among Methanosaeta (R1-15: 26.6%, R2-15: 34.4%) and Methanobacterium (R1-15: 7.4%, R2-15: 3.2%). The genus Methanosaeta was identified from all reactors with the highest abundance from the reactors R2. Mean daily biogas production was 6.79 L from R2-15 and 4.5 L from R1-15, with relative methane gas abundance of 85% and 73%, respectively. Knowledge of anaerobic community dynamics allows process optimization for maximum biogas production.
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Affiliation(s)
- Mohamed Hasnain Isa
- Civil Engineering Programme, Faculty of Engineering, Universiti Teknologi Brunei, Tungku Highway, Gadong, BE1410, Brunei Darussalam
| | - Mohammed J K Bashir
- Department of Environmental Engineering, Faculty of Engineering and Green Technology (FEGT), Universiti Tunku Abdul Rahman, 31900, Kampar, Perak, Malaysia
| | - Lai-Peng Wong
- Department of Environmental Engineering, Faculty of Engineering and Green Technology (FEGT), Universiti Tunku Abdul Rahman, 31900, Kampar, Perak, Malaysia.
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5
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Zhang X, Linghu S, Chen Z, Gu H, Chen X, Wei X, Hu X, Yang Y, Gao Y. Bacterial diversity evolution process based on physicochemical characteristics of sludge treating hydroquinone during acclimation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:31686-31699. [PMID: 35001263 DOI: 10.1007/s11356-021-17325-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 10/29/2021] [Indexed: 06/14/2023]
Abstract
Hydroquinone is one of the main pollutants in coal-gasification wastewater, which is biologically toxic and difficult to remove. The aerobic biodegradation rate, organic toxicity, and microbial community structure at different acclimation stages of degradation of hydroquinone by activated sludge were investigated. In each acclimation cycle, the removal of hydroquinone reached 100% after 5 days, indicating that high-concentration hydroquinone in the activated sludge could be completely biodegraded. When the microbial flora was inhibited by the influent hydroquinone, the enzyme system experienced stress conditions and led to the secretion of secondary metabolites, extracellular protein of 5-10 kDa mainly contributing to the sludge organic toxicity. Microbial diversity analysis showed that with the increase of the concentration of hydroquinone, β-Proteus bacteria such as Azoarcus and Dechloromonas gradually accumulated, which improved the removal of hydroquinone with aerobic activated sludge in the sequencing batch reactor (SBR) system. As the inhibition degree exceeded the appropriate tolerance range of microorganisms, bacteria would secrete much more secondary metabolites, and the organic toxicity of sludge would reach a relatively high level.
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Affiliation(s)
- Xinyu Zhang
- National Engineering Laboratory for High-Concentration Refractory Organic Wastewater Treatment Technologies (NELHROWTT), East China University of Science and Technology, Shanghai, 200237, China
- Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China
| | - Shanshan Linghu
- National Engineering Laboratory for High-Concentration Refractory Organic Wastewater Treatment Technologies (NELHROWTT), East China University of Science and Technology, Shanghai, 200237, China
- Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China
| | - Zhichong Chen
- National Engineering Laboratory for High-Concentration Refractory Organic Wastewater Treatment Technologies (NELHROWTT), East China University of Science and Technology, Shanghai, 200237, China
- Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China
| | - Hao Gu
- National Engineering Laboratory for High-Concentration Refractory Organic Wastewater Treatment Technologies (NELHROWTT), East China University of Science and Technology, Shanghai, 200237, China
- Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China
| | - Xiurong Chen
- National Engineering Laboratory for High-Concentration Refractory Organic Wastewater Treatment Technologies (NELHROWTT), East China University of Science and Technology, Shanghai, 200237, China.
- Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China.
| | - Xiao Wei
- National Engineering Laboratory for High-Concentration Refractory Organic Wastewater Treatment Technologies (NELHROWTT), East China University of Science and Technology, Shanghai, 200237, China
- Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China
| | - Xueyang Hu
- National Engineering Laboratory for High-Concentration Refractory Organic Wastewater Treatment Technologies (NELHROWTT), East China University of Science and Technology, Shanghai, 200237, China
- Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China
| | - Yingying Yang
- National Engineering Laboratory for High-Concentration Refractory Organic Wastewater Treatment Technologies (NELHROWTT), East China University of Science and Technology, Shanghai, 200237, China
- Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China
| | - Yuqing Gao
- National Engineering Laboratory for High-Concentration Refractory Organic Wastewater Treatment Technologies (NELHROWTT), East China University of Science and Technology, Shanghai, 200237, China
- Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China
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Chen X, Hu X, Lu Q, Yang Y, Linghu S, Zhang X. Study on the differences in sludge toxicity and microbial community structure caused by catechol, resorcinol and hydroquinone with metagenomic analysis. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 302:114027. [PMID: 34872176 DOI: 10.1016/j.jenvman.2021.114027] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 10/25/2021] [Accepted: 10/26/2021] [Indexed: 06/13/2023]
Abstract
The aerobic biodegradation rate, organic toxicity and microbial community structure of activated sludge acclimated by catechol, resorcinol and hydroquinone were investigated, to study the relationship between microbial structure and sludge organic toxicity caused by phenolic compounds. At the stable operation stage, the degradation rates of the dihydroxy benzenes in a single sequencing batch reactor (SBR) cycle were followed the order: resorcinol (89.71%) > hydroquinone (85.64%) > catechol (59.62%). Sludge toxicity bioassay indicated that the toxicity of sludge was catechol (45.63%) > hydroquinone (40.28%) > resorcinol (38.15%). The accumulation of secondary metabolites such as 5-10 kDa tryptophan and tyrosine protein substances caused the differential sludge toxicity. Microbial metagenomic analysis showed that the toxicity of sludge was significantly related to the microbial community structure. Thauera, Azoarcus, Pseudomonas and other Proteobacteria formed in the sludge during acclimation. Catechol group had the least dominant bacteria and loop ring opening enzyme genes (catA, dmpB, dxnF, hapD) numbers. Therefore, the degradation of catechol was the most difficult than resorcinol and hydroquinone, resulting the highest sludge toxicity.
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Affiliation(s)
- Xiurong Chen
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China.
| | - Xueyang Hu
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China.
| | - Quanling Lu
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China.
| | - Yingying Yang
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China.
| | - Shanshan Linghu
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China.
| | - Xinyu Zhang
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China.
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7
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Wood Ash Based Treatment of Anaerobic Digestate: State-of-the-Art and Possibilities. Processes (Basel) 2022. [DOI: 10.3390/pr10010147] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The problem of current agricultural practices is not limited to land management but also to the unsustainable consumption of essential nutrients for plants, such as phosphorus. This article focuses on the valorization of wood ash and anaerobic digestate for the preparation of a slow-release fertilizer. The underlying chemistry of the blend of these two materials is elucidated by analyzing the applications of the mixture. First, the feasibility of employing low doses (≤1 g total solids (TS) ash/g TS digestate) of wood ash is explained as a way to improve the composition of the feedstock of anaerobic digestion and enhance biogas production. Secondly, a detailed description concerning high doses of wood ash and their uses in the downstream processing of the anaerobic digestate to further enhance its stability is offered. Among all the physico-chemical phenomena involved, sorption processes are meticulously depicted, since they are responsible for nutrient recovery, dewatering, and self-hardening in preparing a granular fertilizer. Simple activation procedures (e.g., carbonization, carbonation, calcination, acidification, wash, milling, and sieving) are proposed to promote immobilization of the nutrients. Due to the limited information on the combined processing of wood ash and the anaerobic digestate, transformations of similar residues are additionally considered. Considering all the possible synergies in the anaerobic digestion and the downstream stages, a dose of ash of 5 g TS ash/g TS digestate is proposed for future experiments.
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8
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Ni J, Ji J, Li YY, Kubota K. Microbial characteristics in anaerobic membrane bioreactor treating domestic sewage: Effects of HRT and process performance. J Environ Sci (China) 2022; 111:392-399. [PMID: 34949368 DOI: 10.1016/j.jes.2021.04.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 04/21/2021] [Accepted: 04/21/2021] [Indexed: 06/14/2023]
Abstract
Two anaerobic membrane bioreactors (AnMBRs) equipped with different membrane pore size (0.4 or 0.05 µm) were operated at 25˚C and fed with domestic wastewater. The hydraulic retention time (HRT) of the reactors was shortened. The microbial communities of the two AnMBRs were investigated by 16S rRNA gene amplicon sequencing to see the effects of HRT. The predominant Archaea was an aceticlastic methanogen Methanosaeta. The composition of hydrogenotrophic methanogens changed with the HRTs: the population of Methanobacterium was higher for longer HRTs, whereas the population of unclassified Methanoregulaceae was higher for shorter HRTs. The Anaerolineae, Bacteroidia and Clostridia bacteria were dominant in both of the reactors, with a combined relative abundance of over 55%. The relative abundance of Anaerolineae was proportional to the biogas production performance. The change in the population of hydrogenotrophic methanogens or Anaerolineae can be used as an indicator for process monitoring. The sum of the relative abundance of Anaerolineae and Clostridia fluctuated slightly with changes in the HRT in both AnMBRs when the reactor was stably operated. The co-occurrence analysis revealed the relative abundance of the operational taxonomic units belonging to Anaerolineae and Clostridia was functionally equivalent during the treatment of real domestic sewage. A principal coordination analysis revealed that the changes in the microbial community in each reactor were consistent with the change of HRT. In addition, both the HRT and the stability of the process are important factors for maintaining microbial community structures.
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Affiliation(s)
- Jialing Ni
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku 980-8579, Sendai, Japan
| | - Jiayuan Ji
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku 980-8579, Sendai, Japan
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku 980-8579, Sendai, Japan; Department of Frontier Science for Advanced Environment, Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku 980-8579, Sendai, Japan
| | - Kengo Kubota
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku 980-8579, Sendai, Japan.
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9
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Kumar Awasthi M, Wainaina S, Mahboubi A, Zhang Z, Taherzadeh MJ. Methanogen and nitrifying genes dynamics in immersed membrane bioreactors during anaerobic co-digestion of different organic loading rates food waste. BIORESOURCE TECHNOLOGY 2021; 342:125920. [PMID: 34534942 DOI: 10.1016/j.biortech.2021.125920] [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: 08/11/2021] [Revised: 09/05/2021] [Accepted: 09/06/2021] [Indexed: 06/13/2023]
Abstract
This work was aimed to evaluate the distinctive food waste (FW) organic loading rates (OLR) on methanogen and nitrifying genes dynamics and its correlation with identified relative abundance of bacterial dynamics during the anaerobic digestion. This experiment were carried out in the digesters at high OLR of food wastes at (4 to 8 g volatile solids/liter/day reactor R1) and (6 to 10 g volatile solids/liter/day reactor R2). The results shown that the relative abundance of mcrA, mcrB and mcrG genes were richest in the first day of both R1 and R2. In addition, the most of nitrifying genes were greater in after 34 days digestion in R2, while these genes did not show the specific regularity in R1. Finally, the correlation figure shows that Clostridium and Lactobacillus genera were significantly correlated with the different organic acids and methanogen and nitrifying genes dynamics.
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Affiliation(s)
- Mukesh Kumar Awasthi
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China; Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden.
| | - Steven Wainaina
- Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden
| | - Amir Mahboubi
- Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden
| | - Zengqiang Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China
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Leggieri PA, Kerdman-Andrade C, Lankiewicz TS, Valentine MT, O’Malley MA. Non-destructive quantification of anaerobic gut fungi and methanogens in co-culture reveals increased fungal growth rate and changes in metabolic flux relative to mono-culture. Microb Cell Fact 2021; 20:199. [PMID: 34663313 PMCID: PMC8522008 DOI: 10.1186/s12934-021-01684-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 09/22/2021] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Quantification of individual species in microbial co-cultures and consortia is critical to understanding and designing communities with prescribed functions. However, it is difficult to physically separate species or measure species-specific attributes in most multi-species systems. Anaerobic gut fungi (AGF) (Neocallimastigomycetes) are native to the rumen of large herbivores, where they exist as minority members among a wealth of prokaryotes. AGF have significant biotechnological potential owing to their diverse repertoire of potent lignocellulose-degrading carbohydrate-active enzymes (CAZymes), which indirectly bolsters activity of other rumen microbes through metabolic exchange. While decades of literature suggest that polysaccharide degradation and AGF growth are accelerated in co-culture with prokaryotes, particularly methanogens, methods have not been available to measure concentrations of individual species in co-culture. New methods to disentangle the contributions of AGF and rumen prokaryotes are sorely needed to calculate AGF growth rates and metabolic fluxes to prove this hypothesis and understand its causality for predictable co-culture design. RESULTS We present a simple, microplate-based method to measure AGF and methanogen concentrations in co-culture based on fluorescence and absorbance spectroscopies. Using samples of < 2% of the co-culture volume, we demonstrate significant increases in AGF growth rate and xylan and glucose degradation rates in co-culture with methanogens relative to mono-culture. Further, we calculate significant differences in AGF metabolic fluxes in co-culture relative to mono-culture, namely increased flux through the energy-generating hydrogenosome organelle. While calculated fluxes highlight uncertainties in AGF primary metabolism that preclude definitive explanations for this shift, our method will enable steady-state fluxomic experiments to probe AGF metabolism in greater detail. CONCLUSIONS The method we present to measure AGF and methanogen concentrations enables direct growth measurements and calculation of metabolic fluxes in co-culture. These metrics are critical to develop a quantitative understanding of interwoven rumen metabolism, as well as the impact of co-culture on polysaccharide degradation and metabolite production. The framework presented here can inspire new methods to probe systems beyond AGF and methanogens. Simple modifications to the method will likely extend its utility to co-cultures with more than two organisms or those grown on solid substrates to facilitate the design and deployment of microbial communities for bioproduction and beyond.
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Affiliation(s)
- Patrick A. Leggieri
- Department of Chemical Engineering, University of California, Santa Barbara, CA 93106 USA
| | - Corey Kerdman-Andrade
- Department of Chemical Engineering, University of California, Santa Barbara, CA 93106 USA
| | - Thomas S. Lankiewicz
- Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA 93106 USA
- Joint BioEnergy Institute (JBEI), Emeryville, CA 94608 USA
| | - Megan T. Valentine
- Department of Mechanical Engineering, University of California, Santa Barbara, CA 93106 USA
| | - Michelle A. O’Malley
- Department of Chemical Engineering, University of California, Santa Barbara, CA 93106 USA
- Joint BioEnergy Institute (JBEI), Emeryville, CA 94608 USA
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11
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Quispe-Cardenas E, Rogers S. Microbial adaptation and response to high ammonia concentrations and precipitates during anaerobic digestion under psychrophilic and mesophilic conditions. WATER RESEARCH 2021; 204:117596. [PMID: 34530226 DOI: 10.1016/j.watres.2021.117596] [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: 04/20/2021] [Revised: 07/19/2021] [Accepted: 08/22/2021] [Indexed: 06/13/2023]
Abstract
This study explored microbial adaptation to high ammonia concentrations (<1000 mg/L to 4000 mg/L) during anaerobic digestion (AD) under psychrophilic and mesophilic conditions, the latter of which yielded precipitates facilitating investigation of microbial response. The experimental setup was performed at bench-scale using microbial consortia from four different operating anaerobic digesters treating different organic wastes (WW-wastewater sludge, MN-manure, FW- food waste and CO-co-digestion (FW & MN)). Adaptation experiments were conducted with semi-continuous flow mode to resemble large-scale operation. Metagenome and 16S RNA analysis were performed for the first time in a psychrophilic reactor during an ammonia acclimation process. These analyses were also performed in mesophilic reactor exposed to precipitates and high ammonia levels. Diversity reduced when adaptation occurred successfully from 1.1 to 4 g/L of total ammonia nitrogen (TAN) under psychrophilic conditions, while the microbial community became more diverse under mesophilic conditions with ammonia inhibition. We report for the first time Methanocorposculum as a robust hydrogenotrophic methanogen at high ammoniacal concentrations under psychrophilic conditions. Additionally, Methanosarcina was present in low and high ammoniacal concentrations in mesophilic conditions, but there was a shift in species dominance. Methanosarcina barkeri stands out as a more resilient methanogen compared to Methanosarcina mazei, which initially dominated at <1.1 g/L TAN. We also explored the effects of sudden precipitates on methanogenic communities and methane production when they occurred under mesophilic conditions in two reactors. Methane production declined by more than 50% when precipitates occurred and was accompanied by pH reduction and VFA accumulation. Diversity data corroborated that methanogens were severely reduced. These two reactors were not able to recover with 50 days of added operation, demonstrating potential for long-term negative impacts of precipitate formation on AD performance stemming from negative impact to methanogenic communities.
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Affiliation(s)
| | - Shane Rogers
- Institute for a Sustainable Environment, Clarkson University, Potsdam 13699, NY, USA; Civil and Environmental Engineering, Clarkson University, Potsdam 13699, NY, USA.
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12
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Arslan M, Gamal El-Din M. Bacterial diversity in petroleum coke based biofilters treating oil sands process water. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 782:146742. [PMID: 33839672 DOI: 10.1016/j.scitotenv.2021.146742] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 03/19/2021] [Accepted: 03/21/2021] [Indexed: 06/12/2023]
Abstract
Adopting nature-based solutions for the bioremediation of oil sands process water (OSPW) is of significant interest, which requires a thorough understanding of how bacterial communities behave within treatment systems operated under natural conditions. This study investigates the OSPW remediation potential of delayed petroleum-coke (PC), which is a byproduct of bitumen upgrading process and is readily available at oil refining sites, in fixed-bed biofilters particularly for the degradation of naphthenic acids (NAs) and aromatics. The biofilters were operated continuously and total and active bacterial communities were studied by DNA and RNA-based amplicon sequencing in a metataxonomic fashion to extrapolate the underlying degradation mechanisms. The results of total community structure indicated a high abundance of aerobic bacteria at all depths of the biofilter, e.g., Porphyrobacter, Legionella, Pseudomonas, Planctomyces. However, redox conditions within the biofilters were anoxic (-153 to -182 mV) that selected anaerobic bacteria to actively participate in the remediation of OSPW, i.e., Ruminicoccus, Eubacterium, Faecalibacterium, Dorea. After 15 days of operation, the removal of classical NAs was recorded up to 20% whereas oxidized NAs species were poorly removed, i.e., O3-NAs: 4.8%, O4-NAs: 1.2%, O5-NAs: 1.7%, and O6-NAs: 0.5%. Accordingly, monoaromatics, diaromatics, and triaromatics were removed up to 16%, 22%, and 15%, respectively. The physiology of the identified genera suggested that the degradation in the PC-based biofilters was most likely proceeded in a scheme similar to beta-oxidation during anaerobic digestion process. The presence of hydrogenotrophic methanogens namely Methanobrevibacter and Methanomassiliicoccus and quantification of mcrA gene (2.4 × 102 to 8.7 × 102 copies/mg of PC) revealed that methane production was likely occurring in a syntrophic mechanism during the OSPW remediation. A slight reduction in toxicity was also observed. This study suggests that PC-based biofilters may offer some advantages in the remediation of OSPW; however, the production of methane could be of future concerns if operated at field-scale.
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Affiliation(s)
- Muhammad Arslan
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Mohamed Gamal El-Din
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada.
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13
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Xing BS, Han Y, Wang XC, Cao S, Wen J, Zhang K. Acclimatization of anaerobic sludge with cow manure and realization of high-rate food waste digestion for biogas production. BIORESOURCE TECHNOLOGY 2020; 315:123830. [PMID: 32688256 DOI: 10.1016/j.biortech.2020.123830] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/04/2020] [Accepted: 07/08/2020] [Indexed: 06/11/2023]
Abstract
Long-term acclimatization of anaerobic sludge was conducted by operating a mesophilic continuously stirred anaerobic reactor (CSTR) with continuous feeding of food wastes (FW) and cow manure (CM). During the long-term acclimatization, continued increase of enzyme activity was revealed, while the microbial structure tended stable as shown by the Shannon index and microbial community. By biomethane potential analysis, the acclimated sludge had a methane yield about 13 times higher than the initial anaerobic sludge. The acclimated sludge was subsequently used for FW digestion with stepwise organic loading rate increase without CM addition. The functional phyla of Bacteroidetes and Proteobacteria, which originated from CM but not very abundant, were significantly enriched not only during sludge acclimatization with CM addition but also in the process of FW digestion without CM addition. A microbe coexistence network was proposed to support an explanation of the metabolic pathways of FW digestion using the acclimated sludge.
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Affiliation(s)
- Bao-Shan Xing
- International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi, China; Key Laboratory of Environmental Engineering, Shaanxi, China; Xi'an University of Architecture and Technology, No., 13 Yanta Road, Xi'an 710055, China
| | - Yule Han
- International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi, China; Key Laboratory of Environmental Engineering, Shaanxi, China; Xi'an University of Architecture and Technology, No., 13 Yanta Road, Xi'an 710055, China
| | - Xiaochang C Wang
- International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi, China; Key Laboratory of Environmental Engineering, Shaanxi, China; Xi'an University of Architecture and Technology, No., 13 Yanta Road, Xi'an 710055, China.
| | - Sifan Cao
- International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi, China; Key Laboratory of Environmental Engineering, Shaanxi, China; Xi'an University of Architecture and Technology, No., 13 Yanta Road, Xi'an 710055, China
| | - Junwei Wen
- International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi, China; Key Laboratory of Environmental Engineering, Shaanxi, China; Xi'an University of Architecture and Technology, No., 13 Yanta Road, Xi'an 710055, China
| | - Kaidi Zhang
- International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi, China; Key Laboratory of Environmental Engineering, Shaanxi, China; Xi'an University of Architecture and Technology, No., 13 Yanta Road, Xi'an 710055, China
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14
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Microbial Communities and Sulfate-Reducing Microorganisms Abundance and Diversity in Municipal Anaerobic Sewage Sludge Digesters from a Wastewater Treatment Plant (Marrakech, Morocco). Processes (Basel) 2020. [DOI: 10.3390/pr8101284] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Both molecular analyses and culture-dependent isolation were combined to investigate the diversity of sulfate-reducing prokaryotes and explore their role in sulfides production in full-scale anaerobic digesters (Marrakech, Morocco). At global scale, using 16S rRNA gene sequencing, Proteobacteria, Bacteroidetes, Firmicutes, Actinobacteria, Synergistetes, and Euryarchaeota were the most dominant phyla. The abundance of Archaea (3.1–5.7%) was linked with temperature. The mcrA gene ranged from 2.18 × 105 to 1.47 × 107 gene copies.g−1 of sludge. The sulfate-reducing prokaryotes, representing 5% of total sequences, involved in sulfides production were Peptococcaceae, Syntrophaceae, Desulfobulbaceae, Desulfovibrionaceae, Syntrophobacteraceae, Desulfurellaceae, and Desulfobacteraceae. Furthermore, dsrB gene ranged from 2.18 × 105 to 1.92 × 107 gene copies.g−1 of sludge. The results revealed that exploration of diversity and function of sulfate-reducing bacteria may play a key role in decreasing sulfide production, an undesirable by-product, during anaerobic digestion.
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15
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Mu L, Zhang L, Zhu K, Ma J, Ifran M, Li A. Anaerobic co-digestion of sewage sludge, food waste and yard waste: Synergistic enhancement on process stability and biogas production. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 704:135429. [PMID: 31837868 DOI: 10.1016/j.scitotenv.2019.135429] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 10/20/2019] [Accepted: 11/06/2019] [Indexed: 06/10/2023]
Abstract
Anaerobic co-digestion (co-AD) could be a more sustainable waste management solution by sharing the existed anaerobic digestion (AD) facilities and generating more biogas energy. In this study, a series of co-AD of different urban derived organic wastes (sewage sludge-SS, food waste-FW, yard waste-YW) were conducted in a semi-continuous mode, and the corresponding dynamic evolutions of microbial community structure were followed by using real-time quantitative polymerase chain reaction (qPCR). As for co-AD of two feedstocks, introduction of SS (25%, VS basis) in FW significantly improved the process stability and archaea/total microbe ratio (from 0.4% to 17.1%), which might be due to the regulating effect of abundant trace metals in SS; co-AD of SS (25%, VS basis) with YW improved the methane yield by 2.04 times than AD of YW only together with higher methane contents (57.4 ± 1.3% vs. 50.9 ± 2.2%); in co-AD of FW and YW, synergistic effects in terms of increased methane production (3.4-19.1%) were observed, which was correlated with more robust growth of both bacteria and archaea. As for co-AD of three feedstocks, high methane yields of 314.9 ± 17.1 mL/g VS were achieved with a reliable stability. These findings could provide some fundamental and technical information for the co-treatment of urban derived organic wastes in centralized AD facilities.
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Affiliation(s)
- Lan Mu
- 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.
| | - 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
| | - Jiao Ma
- 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
| | - Muhammad Ifran
- 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
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16
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Yoo K, Yoo H, Lee J, Choi EJ, Park J. Exploring the antibiotic resistome in activated sludge and anaerobic digestion sludge in an urban wastewater treatment plant via metagenomic analysis. J Microbiol 2019; 58:123-130. [DOI: 10.1007/s12275-020-9309-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 10/08/2019] [Accepted: 11/03/2019] [Indexed: 10/25/2022]
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17
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Callejas C, Fernández A, Passeggi M, Wenzel J, Bovio P, Borzacconi L, Etchebehere C. Microbiota adaptation after an alkaline pH perturbation in a full-scale UASB anaerobic reactor treating dairy wastewater. Bioprocess Biosyst Eng 2019; 42:2035-2046. [PMID: 31506821 DOI: 10.1007/s00449-019-02198-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 07/31/2019] [Accepted: 08/31/2019] [Indexed: 01/09/2023]
Abstract
The aim of this study was to understand how the microbial community adapted to changes, including a pH perturbation, occurring during the start-up and operation processes in a full-scale methanogenic UASB reactor designed to treat dairy wastewater. The reactor performance, prokaryotic community, and lipid degradation capacity were monitored over a 9-month period. The methanogenic community was studied by mcrA/mrtA gene copy-number quantification and methanogenic activity tests. A diverse prokaryotic community characterized the seeding sludge as assessed by sequencing the V4 region of the 16S rRNA gene. As the feeding began, the bacterial community was dominated by Firmicutes, Synergistetes, and Proteobacteria phyla. After an accidental pH increase that affected the microbial community structure, a sharp increase in the relative abundance of Clostridia and a decrease in the mcrA/mrtA gene copy number and methanogenic activity were observed. After a recovery period, the microbial population regained diversity and methanogenic activity. Alkaline shocks are likely to happen in dairy wastewater treatment because of the caustic soda usage. In this work, the plasticity of the prokaryotic community was key to surviving changes to the external environment and supporting biogas production in the reactor.
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Affiliation(s)
- Cecilia Callejas
- BIOPROA, Faculty of Engineering, Institute of Chemical Engineering, Universidad de La República, Herrera y Reissig 565, Montevideo, Uruguay.
| | - Alfonsina Fernández
- BIOPROA, Faculty of Engineering, Institute of Chemical Engineering, Universidad de La República, Herrera y Reissig 565, Montevideo, Uruguay
| | - Mauricio Passeggi
- BIOPROA, Faculty of Engineering, Institute of Chemical Engineering, Universidad de La República, Herrera y Reissig 565, Montevideo, Uruguay
| | - Jorge Wenzel
- Microbial Ecology Laboratory, BioGem Department, Biological Research Institute Clemente Estable, Ministry of Education, Av. Italia, 3318, Montevideo, Uruguay
| | - Patricia Bovio
- Microbial Ecology Laboratory, BioGem Department, Biological Research Institute Clemente Estable, Ministry of Education, Av. Italia, 3318, Montevideo, Uruguay
| | - Liliana Borzacconi
- BIOPROA, Faculty of Engineering, Institute of Chemical Engineering, Universidad de La República, Herrera y Reissig 565, Montevideo, Uruguay
| | - Claudia Etchebehere
- Microbial Ecology Laboratory, BioGem Department, Biological Research Institute Clemente Estable, Ministry of Education, Av. Italia, 3318, Montevideo, Uruguay
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18
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Banach A, Ciesielski S, Bacza T, Pieczykolan M, Ziembińska-Buczyńska A. Microbial community composition and methanogens' biodiversity during a temperature shift in a methane fermentation chamber. ENVIRONMENTAL TECHNOLOGY 2019; 40:3252-3263. [PMID: 29683411 DOI: 10.1080/09593330.2018.1468490] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 04/17/2018] [Indexed: 06/08/2023]
Abstract
More information on the connection between anaerobic digestion (AD) parameters and composition of the microbial community involved in the AD process is required to gain a better understanding of how a bioreactor functions. The aim of this study was to analyse the composition of microbial communities and the dynamics of methanogens' biodiversity changes during the shift from mesophilic (38°C) to thermophilic (55°C) conditions during biogas production. The total microbial composition was examined via the metagenomic approach based on 16S rRNA gene sequencing, whereas the methanogen communities were analysed using PCR-DGGE (Polymerase Chain Reaction-Denaturing Gradient Gel Electrophoresis) of mcrA. Even though the temperature is one of the crucial parameters affecting microorganisms involved in the AD process, the results presented here revealed that there were no statistically significant differences in bacterial community composition between the mesophilic and thermophilic phases of the process. The most abundant phyla were found to be Proteobacteria, Firmicutes, Actinobacteria and Bacteroidetes. However, the methanogens' community genotypic structure as examined by the PCR-DGGE method changed under thermophilic conditions. The temperature had the strongest impact on the archaeal methanogens in the fermentation chamber directly after implementing the temperature shift. A relatively higher biogas yield and average content of CH4 in the produced biogas were observed under thermophilic conditions.
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Affiliation(s)
- Anna Banach
- Environmental Biotechnology Department, Faculty of Power and Environmental Engineering, The Silesian University of Technology , Gliwice , Poland
| | - Sławomir Ciesielski
- Department of Environmental Biotechnology, University of Warmia and Mazury in Olsztyn , Olsztyn , Poland
| | - Tomasz Bacza
- Environmental Biotechnology Department, Faculty of Power and Environmental Engineering, The Silesian University of Technology , Gliwice , Poland
| | - Marek Pieczykolan
- Regional Center for Water and Wastewater Management Co. , Tychy , Poland
| | - Aleksandra Ziembińska-Buczyńska
- Environmental Biotechnology Department, Faculty of Power and Environmental Engineering, The Silesian University of Technology , Gliwice , Poland
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19
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Ali N, Gong H, Liu X, Giwa AS, Wang K. Evaluation of bacterial association in methane generation pathways of an anaerobic digesting sludge via metagenomic sequencing. Arch Microbiol 2019; 202:31-41. [PMID: 31456050 DOI: 10.1007/s00203-019-01716-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 08/09/2019] [Accepted: 08/18/2019] [Indexed: 12/31/2022]
Abstract
Anaerobic digestion, a recently hot technology to produce biogases especially methane generation for biofuel from wastewater, is considered an effective explanation for energy crisis and global pollution threat. A complex microbiome population is present in sludge, which plays an important role in the digestion of complex polymer into simple monomers. 16S rRNA approaches simply are not enough for amplification due to the involvement of extreme complex population. However, Illumina sequencing is a recent powerful technology to reveal the entire microbiome structure and methane generation pathways in anaerobic digestion. Metagenomic sequencing was tested to reveal the microbial structure of a digested sludge from a local wastewater treatment plant in Beijing. The Illumina HiSeq program was used to extract about 5 GB of data for metagenomic analysis. The classification investigation revealed about 97.64% dominancy of bacteria while 1.78% were detected to be archaea using MG-RAST server. The most abundant bacterial communities were reported to be Actinobacteria, Bacteroidetes, Firmicutes and Proteobacteria. Furthermore, the important microbiome involved in methane generation was revealed. The dominant methanogens were detected (Methanosaeta and Methanosarcina), with affiliation of dominant genes involved in acetoclastic methanogenesis in a digesting sludge. The metagenomic analysis showed that microbial structure and methane generation pathways were successfully dissected in an anaerobic digester.
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Affiliation(s)
- Nasir Ali
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, People's Republic of China.,Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, Shandong Province, People's Republic of China
| | - Hui Gong
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Xiang Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Abdulmoseen Segun Giwa
- Green Intelligence Environmental School, Yangtze Normal University, Chongqing, 408003, People's Republic of China
| | - Kaijun Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, People's Republic of China.
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20
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Senés-Guerrero C, Colón-Contreras FA, Reynoso-Lobo JF, Tinoco-Pérez B, Siller-Cepeda JH, Pacheco A. Biogas-producing microbial composition of an anaerobic digester and associated bovine residues. Microbiologyopen 2019; 8:e00854. [PMID: 31129926 PMCID: PMC6741126 DOI: 10.1002/mbo3.854] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 04/01/2019] [Accepted: 04/15/2019] [Indexed: 11/07/2022] Open
Abstract
Influenced by feedstock type and microbial inoculum, different microbial groups must precisely interact for high-quality biogas yields. As a first approach for optimization, this study aimed to identify through time the biogas-producing microbial community in a 10-ton dry anaerobic digester treating cattle manure by denaturing gradient gel electrophoresis (DGGE) and metagenomics. Moreover, the associated bovine residues or feedstocks (leachate, manure, oxidation lagoon water, rumen) were also characterized to determine their contribution. A diverse and dynamic community characterized by Bacteria (82%-88%) and a considerable amount of Archaea (8%-15%) presented profiles particular to each stage of biogas production. Eukaryotes (2.6%-3.6%), mainly fungi, were a minor but stable component. Proteobacteria represented 47% of the community at the start of the run but only 18% at the end, opposite to the Bacteroidetes/Chlorobi group (8% and 20%, respectively), while Firmicutes (12%-18%) and Actinobacteria (12%-32%) remained relatively constant. Methanogens of the order Methanomicrobiales represented by several species of Methanoculleus were abundant at the end of the run (77%) contrary to Methanosarcinales (11%) and Methanobacteriales (0.7%). Therefore, methanogenesis mainly occurred by the hydrogenotrophic pathway. Manure and oxidation lagoon water seemed to contribute key microorganisms, while rumen dominated by Methanobrevibacter (72%) did not proliferate in the digester. Manure particularly possessed Methanoculleus (24%) and uncultured methanogens identified by DGGE, whereas oxidation lagoon was exclusively abundant in Methanolinea (18%) and Methanosaeta (19%). Leachate, as the microbial inoculum from a previous run, adequately preserved the biogas-producing community. These results could lead to higher biogas yields through bioaugmentation strategies by incorporating higher proportions or an enriched inoculum from the relevant feedstocks.
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Affiliation(s)
- Carolina Senés-Guerrero
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Centro de Biotecnologia-FEMSA, Monterrey, Mexico
| | - Franco A Colón-Contreras
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Centro de Biotecnologia-FEMSA, Monterrey, Mexico
| | | | | | - Jorge H Siller-Cepeda
- SuKarne, Culiacan, Mexico.,Secretaria de Agricultura y Ganaderia, Culiacan Rosales, Mexico
| | - Adriana Pacheco
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Centro de Biotecnologia-FEMSA, Monterrey, Mexico
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21
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Nagler M, Kozjek K, Etemadi M, Insam H, Podmirseg SM. Simple yet effective: Microbial and biotechnological benefits of rumen liquid addition to lignocellulose-degrading biogas plants. J Biotechnol 2019; 300:1-10. [PMID: 31082412 DOI: 10.1016/j.jbiotec.2019.05.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 05/07/2019] [Accepted: 05/09/2019] [Indexed: 01/30/2023]
Abstract
In biogas plants, lignocellulose-rich biomass (LCB) is particularly slowly degraded, causing high hydraulic retention times. This fact lowers the interests for such substrates. To enhance LCB-degradation, cattle rumen fluid, a highly active microbial resource accruing in the growing meat industry, might be used as a potential source for bioaugmentation. This study compares 0%, 20% and 40% rumen liquid in a batch anaerobic digestion approach. Moreover, it determines the biogas- and methane-potentials as well as degradation-speeds of corn straw, co-digested with cattle manure. It inspects microbial communities via marker-gene sequencing, qPCR and RNA-DGGE and draws attention on possible beneficial effects of rumen addition on the biogas-producing community. Bioaugmentation with 20% and 40% v/v rumen liquid accelerated methane yields by 5 and 6 days, respectively (i.e. reaching 90% of total methane production). It also enhanced LCB- as well as (hemi)cellulose- and volatile fatty acid degradation. These results are supported by increased abundances of bacteria, methanogens and anaerobic fungi in treatments with rumen liquid amendment, and point towards the persistence of specific rumen-borne microorganisms especially during the first phase of the experiment. The results suggest that rumen liquid addition is a promising strategy for enhanced and accelerated exploitation of LCB for biomethanisation.
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Affiliation(s)
- Magdalena Nagler
- Institute of Microbiology, Universität Innsbruck, Technikerstraße 25d, 6020 Innsbruck, Austria; ACIB Austrian Centre of Industrial Biotechnology, Petersgasse 14, 8010 Graz, Austria.
| | - Katja Kozjek
- Institute of Microbiology, Universität Innsbruck, Technikerstraße 25d, 6020 Innsbruck, Austria; ACIB Austrian Centre of Industrial Biotechnology, Petersgasse 14, 8010 Graz, Austria
| | - Mohammad Etemadi
- Institute of Microbiology, Universität Innsbruck, Technikerstraße 25d, 6020 Innsbruck, Austria
| | - Heribert Insam
- Institute of Microbiology, Universität Innsbruck, Technikerstraße 25d, 6020 Innsbruck, Austria
| | - Sabine Marie Podmirseg
- Institute of Microbiology, Universität Innsbruck, Technikerstraße 25d, 6020 Innsbruck, Austria; ACIB Austrian Centre of Industrial Biotechnology, Petersgasse 14, 8010 Graz, Austria
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22
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Lefevre E, Redfern L, Cooper EM, Stapleton HM, Gunsch CK. Acetate promotes microbial reductive debromination of tetrabromobisphenol A during the startup phase of anaerobic wastewater sludge bioreactors. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 656:959-968. [PMID: 30625682 PMCID: PMC6481660 DOI: 10.1016/j.scitotenv.2018.11.403] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/26/2018] [Accepted: 11/26/2018] [Indexed: 05/15/2023]
Abstract
The detection of increasing concentrations of tetrabromobisphenol A (TBBPA) in wastewater treatment plants is raising concerns as TBBPA has been identified as a potentially toxic flame retardant. The objectives of this study were to evaluate the effect of acetate biostimulation on TBBPA microbial reductive debromination, and the response of anaerobic sludge associated microbial communities repeatedly exposed to TBBPA. Results indicate that the bulk of the microbial community did not experience significant shifts as a result of TBBPA exposure, and that only a small fraction of the community responded to the presence of TBBPA. Taxa most likely responsible for TBBPA transformation affiliated to Clostridiales and the wastewater sludge group Blvii28. The biostimulating effect of acetate was only observed during reactor startup, when acetogenesis was likely not yet occurring. However, when acetate likely started to be microbially generated in the reactor, acetate addition resulted in a slight but significant inhibiting effect on TBBPA transformation. A significant increase of hydrogenotrophic methanogens in the TBBPA-spiked reactor overtime implies that TBBPA degraders were not in direct competition with methanogens for H2. These results strongly suggest that TBBPA degrading taxa might have been primarily using acetate as an electron donor for the reductive debromination of TBBPA.
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Affiliation(s)
- Emilie Lefevre
- Department of Civil and Environmental Engineering, Duke University, Hudson Hall, Durham, NC 27708, USA
| | - Lauren Redfern
- Department of Civil and Environmental Engineering, Duke University, Hudson Hall, Durham, NC 27708, USA
| | - Ellen M Cooper
- Nicholas School of the Environment, Duke University, 9 Circuit Drive, Durham, NC 27710, USA
| | - Heather M Stapleton
- Nicholas School of the Environment, Duke University, 9 Circuit Drive, Durham, NC 27710, USA
| | - Claudia K Gunsch
- Department of Civil and Environmental Engineering, Duke University, Hudson Hall, Durham, NC 27708, USA.
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23
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Ferrentino R, Langone M, Andreottola G. Progress toward full scale application of the anaerobic side-stream reactor (ASSR) process. BIORESOURCE TECHNOLOGY 2019; 272:267-274. [PMID: 30359880 DOI: 10.1016/j.biortech.2018.10.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 10/09/2018] [Accepted: 10/11/2018] [Indexed: 06/08/2023]
Abstract
In order to reduce the investment costs of the anaerobic side-stream reactor (ASSR) process coupled with an activated sludge system and promote the full scale application, the impact of 1 d anaerobic solid retention time (SRTASSR) and 100% interchange ratio (IR) has been investigated on sludge reduction, carbon and nutrient removal efficiency and microbial community, in a sequencing batch reactor (SBR)-ASSR system. The SBR-ASSR achieved good removal efficiencies in COD (91.5 ± 3.4%), ammonium nitrogen (98.8 ± 0.5%), total nitrogen (87.9 ± 4.9%) and phosphate (92.8 ± 6.7). The sludge yield of the system was 0.1648 g TSS g-1COD; 54% lower compared to a conventional activated sludge (CAS) system. Real time quantitative polymerase chain reaction (q-PCR) showed an abundance of hydrolyzing and fermentative bacteria. Comparison at class and genus level confirmed an abundance of anaerobic hydrolyzing and fermentative bacteria, denitrifying bacteria able to simultaneous perform nitrogen and phosphate removal and phosphate accumulating organisms.
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Affiliation(s)
- R Ferrentino
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 30123 Trento, Italy.
| | - M Langone
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 30123 Trento, Italy
| | - G Andreottola
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 30123 Trento, Italy
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24
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Jiang Y, Dennehy C, Lawlor PG, Hu Z, McCabe M, Cormican P, Zhan X, Gardiner GE. Exploring the roles of and interactions among microbes in dry co-digestion of food waste and pig manure using high-throughput 16S rRNA gene amplicon sequencing. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:5. [PMID: 30622647 PMCID: PMC6318937 DOI: 10.1186/s13068-018-1344-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 12/20/2018] [Indexed: 05/12/2023]
Abstract
BACKGROUND With the increasing global population and increasing demand for food, the generation of food waste and animal manure increases. Anaerobic digestion is one of the best available technologies for food waste and pig manure management by producing methane-rich biogas. Dry co-digestion of food waste and pig manure can significantly reduce the reactor volume, capital cost, heating energy consumption and the cost of digestate liquid management. It is advantageous over mono-digestion of food waste or pig manure due to the balanced carbon/nitrogen ratio, high pH buffering capacity, and provision of trace elements. However, few studies have been carried out to study the roles of and interactions among microbes in dry anaerobic co-digestion systems. Therefore, this study aimed to assess the effects of different inocula (finished digestate and anaerobic sludge taken from wastewater treatment plants) and substrate compositions (food waste to pig manure ratios of 50:50 and 75:25 in terms of volatile solids) on the microbial community structure in food waste and pig manure dry co-digestion systems, and to examine the possible roles of the previously poorly described bacteria and the interactions among dry co-digestion-associated microbes. RESULTS The dry co-digestion experiment lasted for 120 days. The microbial profile during different anaerobic digestion stages was explored using high-throughput 16S rRNA gene amplicon sequencing. It was found that the inoculum factor was more significant in determining the microbial community structure than the substrate composition factor. Significant correlation was observed between the relative abundance of specific microbial taxa and digesters' physicochemical parameters. Hydrogenotrophic methanogens dominated in dry co-digestion systems. CONCLUSIONS The possible roles of specific microbial taxa were explored by correlation analysis, which were consistent with the literature. Based on this, the anaerobic digestion-associated roles of 11 bacteria, which were previously poorly understood, were estimated here for the first time. The inoculum played a more important role in determining the microbial community structure than substrate composition in dry co-digestion systems. Hydrogenotrophic methanogenesis was a significant methane production pathway in dry co-digestion systems.
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Affiliation(s)
- Yan Jiang
- Civil Engineering, College of Engineering & Informatics, National University of Ireland, Galway, Ireland
| | - Conor Dennehy
- Civil Engineering, College of Engineering & Informatics, National University of Ireland, Galway, Ireland
| | - Peadar G. Lawlor
- Pig Development Department, Animal & Grassland Research and Innovation Centre, Moorepark, Teagasc, Fermoy, Co. Cork, Ireland
| | - Zhenhu Hu
- School of Civil Engineering, Hefei University of Technology, Hefei, 230009 Anhui China
| | - Matthew McCabe
- Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - Paul Cormican
- Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - Xinmin Zhan
- Civil Engineering, College of Engineering & Informatics, National University of Ireland, Galway, Ireland
- Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, 518055 People’s Republic of China
| | - Gillian E. Gardiner
- Department of Science, Waterford Institute of Technology, Waterford, Ireland
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André L, Pauss A, Ribeiro T. Solid anaerobic digestion: State-of-art, scientific and technological hurdles. BIORESOURCE TECHNOLOGY 2018; 247:1027-1037. [PMID: 28912079 DOI: 10.1016/j.biortech.2017.09.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 08/31/2017] [Accepted: 09/01/2017] [Indexed: 06/07/2023]
Abstract
In this paper, a state-of-art about solid anaerobic digestion (AD), focused on recent progress and trends of research is proposed. Solid anaerobic digestion should be the most appropriate process for degradation of by-products with high total solid (TS) content, especially lignocellulosic materials like agricultural waste (straw, manure), household waste and food waste. Solid AD is already widely used in waste water treatment plant for treating plant for sewage sludge but could be more developed for lignocellulosic materials with high TS content. Many research works were carried out in Europe on solid AD, focused on current hurdles (BMP, codigestion, inhibition, microbial population, rheology, water transfers, inoculum, etc.) in order to optimize the solid AD process. In conclusion, hurdles of solid AD process should and must be solved in order to propose better productivity and profitability of such system operating with high TS content (>15%), favouring reliable industrial processes.
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Affiliation(s)
- Laura André
- Institut Polytechnique UniLaSalle, UR Transformations & Agroressources, Département STAI, rue Pierre Waguet, BP 30313, 60026 Beauvais Cedex, France
| | - André Pauss
- Sorbonne Universités, EA 4297 TIMR UTC/ESCOM, UTC, CS 60319, 60203 Compiègne cedex, France
| | - Thierry Ribeiro
- Institut Polytechnique UniLaSalle, UR Transformations & Agroressources, Département STAI, rue Pierre Waguet, BP 30313, 60026 Beauvais Cedex, France.
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26
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Rojas-Sossa JP, Murillo-Roos M, Uribe L, Uribe-Lorio L, Marsh T, Larsen N, Chen R, Miranda A, Solís K, Rodriguez W, Kirk D, Liao W. Effects of coffee processing residues on anaerobic microorganisms and corresponding digestion performance. BIORESOURCE TECHNOLOGY 2017; 245:714-723. [PMID: 28917107 DOI: 10.1016/j.biortech.2017.08.098] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 08/14/2017] [Accepted: 08/16/2017] [Indexed: 06/07/2023]
Abstract
The objective of this study was to delineate the effects of different coffee processing residues on the anaerobic microbes and corresponding digestion performance. The results elucidated that mucilage-rich feed enhanced the accumulation of methanogens, which consequently led to better digestion performance of biogas production. Fifty percent more methane and up to 3 times more net energy (heat and electricity) output were achieved by the digestion of the mucilage-rich feed (M3). The microbial community and statistical analyses further elucidated that different residues in the feed had significant impact on microbial distribution and correspondingly influenced the digestion performance.
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Affiliation(s)
- Juan Pablo Rojas-Sossa
- Agricultural Engineering, University of Costa Rica, San José, Costa Rica; Anaerobic Digestion Research and Education Center, Biosystems and Agricultural Engineering, Michigan State University, MI, USA
| | - Mariana Murillo-Roos
- Agronomy Research Center, University of Costa Rica, San José, Costa Rica; National Institute for Innovation and Transfer of Agricultural Technology, Ministry of Agriculture, San José, Costa Rica
| | - Lidieth Uribe
- Agronomy Research Center, University of Costa Rica, San José, Costa Rica
| | - Lorena Uribe-Lorio
- Cellular and Molecular Biology Research Center, University of Costa Rica, San José, Costa Rica
| | - Terence Marsh
- Microbiology and Molecular Genetics, Michigan State University, MI, USA
| | | | - Rui Chen
- Anaerobic Digestion Research and Education Center, Biosystems and Agricultural Engineering, Michigan State University, MI, USA
| | - Alberto Miranda
- Fabio Baudrit Experimental Station, University of Costa Rica, San José, Costa Rica
| | - Kattia Solís
- Agricultural Engineering, University of Costa Rica, San José, Costa Rica
| | - Werner Rodriguez
- Fabio Baudrit Experimental Station, University of Costa Rica, San José, Costa Rica
| | - Dana Kirk
- Anaerobic Digestion Research and Education Center, Biosystems and Agricultural Engineering, Michigan State University, MI, USA
| | - Wei Liao
- Anaerobic Digestion Research and Education Center, Biosystems and Agricultural Engineering, Michigan State University, MI, USA.
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27
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Wojcieszak M, Pyzik A, Poszytek K, Krawczyk PS, Sobczak A, Lipinski L, Roubinek O, Palige J, Sklodowska A, Drewniak L. Adaptation of Methanogenic Inocula to Anaerobic Digestion of Maize Silage. Front Microbiol 2017; 8:1881. [PMID: 29033919 PMCID: PMC5625012 DOI: 10.3389/fmicb.2017.01881] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 09/14/2017] [Indexed: 11/24/2022] Open
Abstract
A well-balanced microbial consortium is crucial for efficient biogas production. In turn, one of a major factor that influence on the structure of anaerobic digestion (AD) consortium is a source of microorganisms which are used as an inoculum. This study evaluated the influence of inoculum sources (with various origin) on adaptation of a biogas community and the efficiency of the biomethanization of maize silage. As initial inocula for AD of maize silage the samples from: (i) an agricultural biogas plant (ABP) which utilizes maize silage as a main substrate, (ii) cattle slurry (CS), which contain elevated levels of lignocelluloses materials, and (iii) raw sewage sludge (RSS) with low content of plant origin materials were used. The adaptation of methanogenic consortia was monitored during a series of passages, and the functionality of the adapted consortia was verified through start-up operation of AD in two-stage reactors. During the first stages of the adaptation phase, methanogenic consortia occurred very slowly, and only after several passages did the microbial community adapts to allow production of biogas with high methane content. The ABP consortium revealed highest biogas production in the adaptation and in the start-up process. The biodiversity dynamics monitored during adaptation and start-up process showed that community profile changed in a similar direction in three studied consortia. Native communities were very distinct to each other, while at the end of the Phase II of the start-up process microbial diversity profile was similar in all consortia. All adopted bacterial communities were dominated by representatives of Porphyromonadaceae, Rikenellaceae, Ruminococcaceae, and Synergistaceae. A shift from low acetate-preferring acetoclastic Methanosaetaceae (ABP and RSS) and/or hydrogenotrophic Archaea, e.g., Methanomicrobiaceae (CS) prevailing in the inoculum samples to larger populations of high acetate-preferring acetoclastic Methanosarcinaceae was observed by the end of the experiment. As a result, three independent, functional communities that syntrophically produced methane from acetate (primarily) and H2/CO2, methanol and methylamines were adapted. This study provides new insights into the specific process by which different inocula sampled from typical methanogenic environments that are commonly used to initiate industrial installations gradually adapted to allow biogas production from maize silage.
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Affiliation(s)
- Martyna Wojcieszak
- Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Adam Pyzik
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Krzysztof Poszytek
- Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Pawel S Krawczyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Adam Sobczak
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland.,Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Leszek Lipinski
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Otton Roubinek
- Institute of Nuclear Chemistry and Technology, Warsaw, Poland
| | - Jacek Palige
- Institute of Nuclear Chemistry and Technology, Warsaw, Poland
| | - Aleksandra Sklodowska
- Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Lukasz Drewniak
- Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Warsaw, Poland
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Guo J, Ni BJ, Han X, Chen X, Bond P, Peng Y, Yuan Z. Unraveling microbial structure and diversity of activated sludge in a full-scale simultaneous nitrogen and phosphorus removal plant using metagenomic sequencing. Enzyme Microb Technol 2017; 102:16-25. [DOI: 10.1016/j.enzmictec.2017.03.009] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 03/19/2017] [Accepted: 03/20/2017] [Indexed: 12/25/2022]
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29
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Lyles CN, Parisi VA, Beasley WH, Van Nostrand JD, Zhou J, Suflita JM. Elucidation of the methanogenic potential from coalbed microbial communities amended with volatile fatty acids. FEMS Microbiol Ecol 2017; 93:3078548. [PMID: 28369331 DOI: 10.1093/femsec/fix040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 03/16/2017] [Indexed: 11/13/2022] Open
Abstract
The potential for modern coalfield methanogenesis was assessed using formation water from the Illinois Basin, Powder River Basin and Cook Inlet gas field as inocula for nutrient-replete incubations amended with C1-C5 fatty acids as presumed intermediates formed during anaerobic coal biodegradation. Instead of the expected rapid mineralization of these substrates, methanogenesis was inordinately slow (∼1 μmol day-1), following long lag periods (>100 days), and methane yields typically did not reach stoichiometrically expected levels. However, a gene microarray confirmed the potential for a wide variety of microbiological functions, including methanogenesis, at all sites. The Cook Inlet incubations produced methane at a relatively rapid rate when amended with butyrate (r = 0.98; p = 0.001) or valerate (r = 0.84; p = 0.04), a result that significantly correlated with the number of positive mcr gene sequence probes from the functional gene microarray and was consistent with the in situ detection of C4-C5 alkanoic acids. This finding highlighted the role of syntrophy for the biodegradation of the softer lignite and subbituminous coal in this formation, but methanogenesis from the harder subbituminous and bituminous coals in the other fields was less apparent. We conclude that coal methanogenesis is probably not limited by the inherent lack of metabolic potential, the presence of alternate electron acceptors or the lack of available nutrients, but more likely restricted by the inherent recalcitrance of the coal itself.
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Affiliation(s)
- Christopher N Lyles
- Department of Microbiology and Plant Biology and the Institute for Energy and the Environment, University of Oklahoma, Norman, OK 73019-0390, USA
| | - Victoria A Parisi
- Department of Microbiology and Plant Biology and the Institute for Energy and the Environment, University of Oklahoma, Norman, OK 73019-0390, USA
| | | | - Joy D Van Nostrand
- Department of Microbiology and Plant Biology and the Institute for Energy and the Environment, University of Oklahoma, Norman, OK 73019-0390, USA.,Institute for Environmental Genomics, University of Oklahoma, Norman, OK 73019-0390, USA
| | - Jizhong Zhou
- Department of Microbiology and Plant Biology and the Institute for Energy and the Environment, University of Oklahoma, Norman, OK 73019-0390, USA.,Institute for Environmental Genomics, University of Oklahoma, Norman, OK 73019-0390, USA
| | - Joseph M Suflita
- Department of Microbiology and Plant Biology and the Institute for Energy and the Environment, University of Oklahoma, Norman, OK 73019-0390, USA
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30
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Stagnati L, Soffritti G, Lanubile A, Busconi M. Comparison of six methods for the recovery of PCR-compatible microbial DNA from an agricultural biogas plant. Appl Microbiol Biotechnol 2017; 101:3907-3917. [PMID: 28184987 DOI: 10.1007/s00253-017-8152-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 01/23/2017] [Accepted: 01/25/2017] [Indexed: 01/02/2023]
Abstract
Six different commercial methods were compared to evaluate their efficiency in recovering high quantity/quality PCR compatible microbial DNA from an agricultural biogas plant. Within the last two decades, biogas plants have been developed to produce energy from organic wastes and from devoted biomass. The complex biotransformations are performed by a diverse consortium of microorganisms that is an important reserve of genes and enzymatic activities with a huge range of applications in various commercial fields. In this respect, the ability to isolate DNA from a complex matrix is of high importance. Important parameters of the recovered DNA are good yield, purity, and quality. The methods examined showed considerable differences about quantity and quality of the recovered DNA and, usually, it was observed that a higher amount was accompanied by more degradation. DNA purity was determined by its PCR amplificability. Only two methods were able to provide DNA pure enough to be directly amplified. For the rest of the methods, a few intermediate steps such as dilution and/or the addition of polyvinylpyrrolidone were necessary to remove the inhibitors present and to amplify the DNA. Real-time PCR analysis evidenced that, as expected, prokaryotic DNA was much more abundant than eukaryotic DNA, but some methods were more suited to recovering prokaryotic or eukaryotic DNA. The digestion analysis of ribosomal DNA amplicons confirmed the influence of the methods on the final output, allowing the recovery of only a fraction of the present species as determined by sequencing a small prokaryotic and eukaryotic ribosomal library.
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Affiliation(s)
- L Stagnati
- Department of Sustainable Crop Production, Faculty of Agricultural, Food and Environmental Sciences, Università Cattolica del Sacro Cuore, Via Emilia Parmense, 84, 29122, Piacenza, Italy.
| | - G Soffritti
- Department of Sustainable Crop Production, Faculty of Agricultural, Food and Environmental Sciences, Università Cattolica del Sacro Cuore, Via Emilia Parmense, 84, 29122, Piacenza, Italy
| | - A Lanubile
- Department of Sustainable Crop Production, Faculty of Agricultural, Food and Environmental Sciences, Università Cattolica del Sacro Cuore, Via Emilia Parmense, 84, 29122, Piacenza, Italy
| | - M Busconi
- Department of Sustainable Crop Production, Faculty of Agricultural, Food and Environmental Sciences, Università Cattolica del Sacro Cuore, Via Emilia Parmense, 84, 29122, Piacenza, Italy
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31
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Incubation of innovative methanogenic communities to seed anaerobic digesters. Appl Microbiol Biotechnol 2016; 100:9795-9806. [PMID: 27717964 DOI: 10.1007/s00253-016-7875-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 09/06/2016] [Accepted: 09/20/2016] [Indexed: 10/20/2022]
Abstract
The methanogenic communities in alternative inocula and their potential to increase CH4 production in mesophilic and psychrophilic dairy manure-based anaerobic digesters were examined. Quantitative-PCR and terminal restriction fragment length polymorphism (T-RFLP) profiles were used to determine archaeal and methanogenic community changes when three inocula (wetland sediment (WS), landfill leachate (LL), and mesophilic digestate (MD)) were incubated at 15, 25, and 35 °C for 91 and 196 days. After each incubation period, the inocula were used in biochemical methane potential (BMP) tests at the incubation temperatures. There was no significant correlation between inoculum mcrA gene copy numbers and CH4 produced in BMP tests, suggesting that population size was not a distinguishing characteristic for predicting CH4 production. Archaeal composition in LL and WS reactors generally converged with MD reactors after incubation at 25 and 35 °C for 196 days. These MD reactors had high relative abundance of TRF 302, likely Methanosaetaceae, and low acetic acid (0.62-1.61 mM). At 15 °C incubation, most reactors were associated with high acetic acid (1.61-133.6 mM) and dominated by TRF 199, likely Methanosarcinaceae. The LL reactor incubated at 25 °C for 91 days had higher relative abundance of TRF 199 and produced significantly higher CH4 than WS and MD reactors in BMP test. In the future, it may be possible to create enrichment cultures that favor particular methanogens and use them as inoculum to benefit digesters at low mesophilic temperatures. Our data provides evidence that tailoring the archaeal community could benefit digesters operating under different conditions.
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32
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Dasa KT, Westman SY, Millati R, Cahyanto MN, Taherzadeh MJ, Niklasson C. Inhibitory Effect of Long-Chain Fatty Acids on Biogas Production and the Protective Effect of Membrane Bioreactor. BIOMED RESEARCH INTERNATIONAL 2016; 2016:7263974. [PMID: 27699172 PMCID: PMC5031908 DOI: 10.1155/2016/7263974] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 07/26/2016] [Accepted: 08/23/2016] [Indexed: 11/25/2022]
Abstract
Anaerobic digestion of lipid-containing wastes for biogas production is often hampered by the inhibitory effect of long-chain fatty acids (LCFAs). In this study, the inhibitory effects of LCFAs (palmitic, stearic, and oleic acid) on biogas production as well as the protective effect of a membrane bioreactor (MBR) against LCFAs were examined in thermophilic batch digesters. The results showed that palmitic and oleic acid with concentrations of 3.0 and 4.5 g/L resulted in >50% inhibition on the biogas production, while stearic acid had an even stronger inhibitory effect. The encased cells in the MBR system were able to perform better in the presence of LCFAs. This system exhibited a significantly lower percentage of inhibition than the free cell system, not reaching over 50% at any LCFA concentration tested.
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Affiliation(s)
- Kris Triwulan Dasa
- Department of Food and Agricultural Product Technology, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
| | - Supansa Y. Westman
- Swedish Center for Resource Recovery, University of Borås, 50190 Borås, Sweden
| | - Ria Millati
- Department of Food and Agricultural Product Technology, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
| | - Muhammad Nur Cahyanto
- Department of Food and Agricultural Product Technology, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
| | | | - Claes Niklasson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296 Gothenburg, Sweden
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33
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Lefevre E, Cooper E, Stapleton HM, Gunsch CK. Characterization and Adaptation of Anaerobic Sludge Microbial Communities Exposed to Tetrabromobisphenol A. PLoS One 2016; 11:e0157622. [PMID: 27463972 PMCID: PMC4963083 DOI: 10.1371/journal.pone.0157622] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 06/02/2016] [Indexed: 11/22/2022] Open
Abstract
The increasing occurrence of tetrabromobisphenol A (TBBPA) in the environment is raising questions about its potential ecological and human health impacts. TBBPA is microbially transformed under anaerobic conditions to bisphenol A (BPA). However, little is known about which taxa degrade TBBPA and the adaptation of microbial communities exposed to TBBPA. The objectives of this study were to characterize the effect of TBBPA on microbial community structure during the start-up phase of a bench-scale anaerobic sludge reactor, and identify taxa that may be associated with TBBPA degradation. TBBPA degradation was monitored using LC/MS-MS, and the microbial community was characterized using Ion Torrent sequencing and qPCR. TBBPA was nearly completely transformed to BPA via reductive debromination in 55 days. Anaerobic reactor performance was not negatively affected by the presence of TBBPA and the bulk of the microbial community did not experience significant shifts. Several taxa showed a positive response to TBBPA, suggesting they may be associated with TBBPA degradation. Some of these taxa had been previously identified as dehalogenating bacteria including Dehalococcoides, Desulfovibrio, Propionibacterium, and Methylosinus species, but most had not previously been identified as having dehalogenating capacities. This study is the first to provide in-depth information on the microbial dynamics of anaerobic microbial communities exposed to TBBPA.
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Affiliation(s)
- Emilie Lefevre
- Department of Civil and Environmental Engineering, Duke University, Durham, NC, United States of America
| | - Ellen Cooper
- Nicholas School of the Environment, Duke University, Durham, NC, United States of America
| | - Heather M. Stapleton
- Nicholas School of the Environment, Duke University, Durham, NC, United States of America
| | - Claudia K. Gunsch
- Department of Civil and Environmental Engineering, Duke University, Durham, NC, United States of America
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34
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André L, Ndiaye M, Pernier M, Lespinard O, Pauss A, Lamy E, Ribeiro T. Methane production improvement by modulation of solid phase immersion in dry batch anaerobic digestion process: Dynamic of methanogen populations. BIORESOURCE TECHNOLOGY 2016; 207:353-360. [PMID: 26897414 DOI: 10.1016/j.biortech.2016.02.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 02/05/2016] [Accepted: 02/08/2016] [Indexed: 06/05/2023]
Abstract
Several 60L dry batch anaerobic digestion (AD) reactors were implemented with or without liquid reserve on cattle manure. The immersed part modulation of cattle manure increased the methane flow of about 13%. The quantitative real time PCR and the optimized DNA extraction were implemented and validated to characterize and quantify the methanogen dynamic in dry batch AD process. Final quantities of methanogens converged toward the same level in several inocula at the end of AD. Methanogen dynamic was shown by dominance of Methanosarcinaceae for acetotrophic methanogens and Methanobacteriales for the hydrogenotrophic methanogens. Overall, methanogens populations were stabilized in liquid phase, except Methanosaetaceae. Solid phase was colonized by Methanomicrobiales and Methanosarcinaceae populations giving a support to biofilm development. The methane increase could be explained by a raise of Methanosarcinaceae population in presence of a total contact between solid and liquid phases. Methanosarcinaceae was a bio-indicator of the methane production.
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Affiliation(s)
- L André
- Sorbonne Universités, EA 4297 TIMR UTC/ESCOM, UTC, CS 60 319, 60 203 Compiègne Cédex, France; Institut Polytechnique LaSalle Beauvais, Département des Sciences et Techniques Agro-Industrielles, rue Pierre Waguet, BP 30313, 60026 Beauvais Cédex, France
| | - M Ndiaye
- Institut Polytechnique LaSalle Beauvais, Département des Sciences et Techniques Agro-Industrielles, rue Pierre Waguet, BP 30313, 60026 Beauvais Cédex, France
| | - M Pernier
- Institut Polytechnique LaSalle Beauvais, Département des Sciences et Techniques Agro-Industrielles, rue Pierre Waguet, BP 30313, 60026 Beauvais Cédex, France
| | - O Lespinard
- ERigène, 19 rue Pierre Waguet, 60000 Beauvais, France
| | - A Pauss
- Sorbonne Universités, EA 4297 TIMR UTC/ESCOM, UTC, CS 60 319, 60 203 Compiègne Cédex, France
| | - E Lamy
- Sorbonne Universités, EA 4297 TIMR UTC/ESCOM, UTC, CS 60 319, 60 203 Compiègne Cédex, France
| | - T Ribeiro
- Institut Polytechnique LaSalle Beauvais, Département des Sciences et Techniques Agro-Industrielles, rue Pierre Waguet, BP 30313, 60026 Beauvais Cédex, France.
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35
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Assessment of hydrogen metabolism in commercial anaerobic digesters. Appl Microbiol Biotechnol 2016; 100:4699-710. [DOI: 10.1007/s00253-016-7436-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 02/29/2016] [Accepted: 03/03/2016] [Indexed: 01/13/2023]
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36
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Thanh NT, Watari T, Thao TP, Hatamoto M, Tanikawa D, Syutsubo K, Fukuda M, Tan NM, Anh TK, Yamaguchi T, Huong NL. Impact of aluminum chloride on process performance and microbial community structure of granular sludge in an upflow anaerobic sludge blanket reactor for natural rubber processing wastewater treatment. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2016; 74:500-507. [PMID: 27438256 DOI: 10.2166/wst.2016.229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this study, granular sludge formation was carried out using an aluminum chloride supplement in an upflow anaerobic sludge blanket (UASB) reactor treating natural rubber processing wastewater. Results show that during the first 75 days after the start-up of the UASB reactor with an organic loading rate (OLR) of 2.65 kg-COD·m(-3)·day(-1), it performed stably with a removal of 90% of the total chemical oxygen demand (COD) and sludge still remained in small dispersed flocs. However, after aluminum chloride was added at a concentration of 300 mg·L(-1) and the OLR range was increased up to 5.32 kg-COD·m(-3)·day(-1), the total COD removal efficiency rose to 96.5 ± 2.6%, with a methane recovery rate of 84.9 ± 13.4%, and the flocs began to form granules. Massively parallel 16S rRNA gene sequencing of the sludge retained in the UASB reactor showed that total sequence reads of Methanosaeta sp. and Methanosarcina sp., reported to be the key organisms for granulation, increased after 311 days of operation. This indicates that the microbial community structure of the retained sludge in the UASB reactor at the end of the experiment gave a good account of itself in not only COD removal, but also granule formation.
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Affiliation(s)
- Nguyen Thi Thanh
- School of Biotechnology and Food Technology, Hanoi University of Science and Technology, No.1, Dai Co Viet, Hai Ba Trung District, Hanoi, Vietnam E-mail: ;
| | - Takahiro Watari
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Japan
| | - Tran Phuong Thao
- School of Biotechnology and Food Technology, Hanoi University of Science and Technology, No.1, Dai Co Viet, Hai Ba Trung District, Hanoi, Vietnam E-mail: ;
| | - Masashi Hatamoto
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Japan
| | - Daisuke Tanikawa
- Department of Civil and Environmental Engineering, National Institute of Technology, Kure College, 1-2-11 Agaminami, Kure, Japan
| | - Kazuaki Syutsubo
- Center for Regional Environmental Research, National Institute for Environmental Studies, 6-2 Onogawa, Tsukuba, Japan
| | - Masao Fukuda
- Department of Bioengineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Japan
| | - Nguyen Minh Tan
- School of Chemical Engineering, Hanoi University of Science and Technology, No.1, Dai Co Viet, Hai Ba Trung District, Hanoi, Vietnam
| | - To Kim Anh
- School of Biotechnology and Food Technology, Hanoi University of Science and Technology, No.1, Dai Co Viet, Hai Ba Trung District, Hanoi, Vietnam E-mail: ;
| | - Takashi Yamaguchi
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Japan
| | - Nguyen Lan Huong
- School of Biotechnology and Food Technology, Hanoi University of Science and Technology, No.1, Dai Co Viet, Hai Ba Trung District, Hanoi, Vietnam E-mail: ;
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Bassani I, Kougias PG, Treu L, Angelidaki I. Biogas Upgrading via Hydrogenotrophic Methanogenesis in Two-Stage Continuous Stirred Tank Reactors at Mesophilic and Thermophilic Conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:12585-93. [PMID: 26390125 DOI: 10.1021/acs.est.5b03451] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
This study proposes an innovative setup composed by two stage reactors to achieve biogas upgrading coupling the CO2 in the biogas with external H2 and subsequent conversion into CH4 by hydrogenotrophic methanogenesis. In this configuration, the biogas produced in the first reactor was transferred to the second one, where H2 was injected. This configuration was tested at both mesophilic and thermophilic conditions. After H2 addition, the produced biogas was upgraded to average CH4 content of 89% in the mesophilic reactor and 85% in the thermophilic. At thermophilic conditions, a higher efficiency of CH4 production and CO2 conversion was recorded. The consequent increase of pH did not inhibit the process indicating adaptation of microorganisms to higher pH levels. The effects of H2 on the microbial community were studied using high-throughput Illumina random sequences and full-length 16S rRNA genes extracted from the total sequences. The relative abundance of archaeal community markedly increased upon H2 addition with Methanoculleus as dominant genus. The increase of hydrogenotrophic methanogens and syntrophic Desulfovibrio and the decrease of aceticlastic methanogens indicate a H2-mediated shift toward the hydrogenotrophic pathway enhancing biogas upgrading. Moreover, Thermoanaerobacteraceae were likely involved in syntrophic acetate oxidation with hydrogenotrophic methanogens in absence of aceticlastic methanogenesis.
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Affiliation(s)
- Ilaria Bassani
- Department of Environmental Engineering, Technical University of Denmark , Kgs. Lyngby, Denmark
| | - Panagiotis G Kougias
- Department of Environmental Engineering, Technical University of Denmark , Kgs. Lyngby, Denmark
| | - Laura Treu
- Department of Environmental Engineering, Technical University of Denmark , Kgs. Lyngby, Denmark
| | - Irini Angelidaki
- Department of Environmental Engineering, Technical University of Denmark , Kgs. Lyngby, Denmark
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Design and application of a synthetic DNA standard for real-time PCR analysis of microbial communities in a biogas digester. Appl Microbiol Biotechnol 2015; 99:6855-63. [DOI: 10.1007/s00253-015-6721-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 05/19/2015] [Accepted: 05/23/2015] [Indexed: 11/25/2022]
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Kamali M, Khodaparast Z. Review on recent developments on pulp and paper mill wastewater treatment. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2015; 114:326-42. [PMID: 24953005 DOI: 10.1016/j.ecoenv.2014.05.005] [Citation(s) in RCA: 156] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 05/07/2014] [Accepted: 05/09/2014] [Indexed: 05/24/2023]
Abstract
Economic benefits of the pulp and paper industry have led it to be one of the most important industrial sections in the world. Nevertheless, in recent years, pulp and paper mills are facing challenges with the energy efficiency mechanisms and management of the resulting pollutants, considering the environmental feedbacks and ongoing legal requirements. This study reviews and discusses the recent developments of affordable methods dealing with pulp and paper mill wastewaters. To this end, the current state of the various processes used for pulp and paper production from virgin or recovered fibers has been briefly reviewed. Also, the relevant contaminants have been investigated, considering the used raw materials and applied techniques as the subject for further discussion about the relevant suitable wastewater treatment methods. The results of the present study indicated that adopting the integrated methods, alongside a combination of biological (e.g., anaerobic digestion) and physicochemical (e.g., novel Fenton reactions) treatment methods, can be environmentally and economically preferable to minimize environmental contaminants and energy recycling.
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Affiliation(s)
| | - Zahra Khodaparast
- University of Aveiro, Department of Biology, Campus Universitario de Santiago, 3810-193 Aveiro, Portugal.
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Guo J, Peng Y, Ni BJ, Han X, Fan L, Yuan Z. Dissecting microbial community structure and methane-producing pathways of a full-scale anaerobic reactor digesting activated sludge from wastewater treatment by metagenomic sequencing. Microb Cell Fact 2015; 14:33. [PMID: 25880314 PMCID: PMC4381419 DOI: 10.1186/s12934-015-0218-4] [Citation(s) in RCA: 196] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 02/24/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Anaerobic digestion has been widely applied to treat the waste activated sludge from biological wastewater treatment and produce methane for biofuel, which has been one of the most efficient solutions to both energy crisis and environmental pollution challenges. Anaerobic digestion sludge contains highly complex microbial communities, which play crucial roles in sludge treatment. However, traditional approaches based on 16S rRNA amplification or fluorescent in situ hybridization cannot completely reveal the whole microbial community structure due to the extremely high complexity of the involved communities. In this sense, the next-generation high-throughput sequencing provides a powerful tool for dissecting microbial community structure and methane-producing pathways in anaerobic digestion. RESULTS In this work, the metagenomic sequencing was used to characterize microbial community structure of the anaerobic digestion sludge from a full-scale municipal wastewater treatment plant. Over 3.0 gigabases of metagenomic sequence data were generated with the Illumina HiSeq 2000 platform. Taxonomic analysis by MG-RAST server indicated that overall bacteria were dominant (~93%) whereas a considerable abundance of archaea (~6%) were also detected in the anaerobic digestion sludge. The most abundant bacterial populations were found to be Proteobacteria, Firmicutes, Bacteroidetes, and Actinobacteria. Key microorganisms and related pathways involved in methanogenesis were further revealed. The dominant proliferation of Methanosaeta and Methanosarcina, together with the functional affiliation of enzymes-encoding genes (acetate kinase (AckA), phosphate acetyltransferase (PTA), and acetyl-CoA synthetase (ACSS)), suggested that the acetoclastic methanogenesis is the dominant methanogenesis pathway in the full-scale anaerobic digester. CONCLUSIONS In short, the metagenomic sequencing study of this work successfully dissected the detail microbial community structure and the dominated methane-producing pathways of a full-scale anaerobic digester. The knowledge garnered would facilitate to develop more efficient full-scale anaerobic digestion systems to achieve high-rate waste sludge treatment and methane production.
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Affiliation(s)
- Jianhua Guo
- Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, Peoples' Republic of China.
- Advanced Water Management Centre (AWMC), The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia.
| | - Yongzhen Peng
- Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, Peoples' Republic of China.
| | - Bing-Jie Ni
- Advanced Water Management Centre (AWMC), The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia.
| | - Xiaoyu Han
- Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, Peoples' Republic of China.
- Beijing Drainage Group Co., Ltd, Beijing, 100022, Peoples' Republic of China.
| | - Lu Fan
- Advanced Water Management Centre (AWMC), The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia.
| | - Zhiguo Yuan
- Advanced Water Management Centre (AWMC), The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia.
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41
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Primers: Functional Genes and 16S rRNA Genes for Methanogens. SPRINGER PROTOCOLS HANDBOOKS 2015. [DOI: 10.1007/8623_2015_138] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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Alvarado A, Montañez-Hernández LE, Palacio-Molina SL, Oropeza-Navarro R, Luévanos-Escareño MP, Balagurusamy N. Microbial trophic interactions and mcrA gene expression in monitoring of anaerobic digesters. Front Microbiol 2014; 5:597. [PMID: 25429286 PMCID: PMC4228917 DOI: 10.3389/fmicb.2014.00597] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2014] [Accepted: 10/22/2014] [Indexed: 11/13/2022] Open
Abstract
Anaerobic digestion (AD) is a biological process where different trophic groups of microorganisms break down biodegradable organic materials in the absence of oxygen. A wide range of AD technologies is being used to convert livestock manure, municipal and industrial wastewaters, and solid organic wastes into biogas. AD gains importance not only because of its relevance in waste treatment but also because of the recovery of carbon in the form of methane, which is a renewable energy and is used to generate electricity and heat. Despite the advances on the engineering and design of new bioreactors for AD, the microbiology component always poses challenges. Microbiology of AD processes is complicated as the efficiency of the process depends on the interactions of various trophic groups involved. Due to the complex interdependence of microbial activities for the functionality of the anaerobic bioreactors, the genetic expression of mcrA, which encodes a key enzyme in methane formation, is proposed as a parameter to monitor the process performance in real time. This review evaluates the current knowledge on microbial groups, their interactions, and their relationship to the performance of anaerobic biodigesters with a focus on using mcrA gene expression as a tool to monitor the process.
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Affiliation(s)
- Alejandra Alvarado
- Laboratorio de Biorremediación, Escuela de Ciencias Biológicas, Universidad Autónoma de Coahuila, TorreónMéxico
- Department of Ecophysiology, Max Planck Institute for Terrestrial Microbiology, MarburgGermany
| | - Lilia E. Montañez-Hernández
- Laboratorio de Biorremediación, Escuela de Ciencias Biológicas, Universidad Autónoma de Coahuila, TorreónMéxico
| | - Sandra L. Palacio-Molina
- Laboratorio de Biorremediación, Escuela de Ciencias Biológicas, Universidad Autónoma de Coahuila, TorreónMéxico
| | | | - Miriam P. Luévanos-Escareño
- Laboratorio de Biorremediación, Escuela de Ciencias Biológicas, Universidad Autónoma de Coahuila, TorreónMéxico
| | - Nagamani Balagurusamy
- Laboratorio de Biorremediación, Escuela de Ciencias Biológicas, Universidad Autónoma de Coahuila, TorreónMéxico
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Pyrosequencing of mcrA and archaeal 16S rRNA genes reveals diversity and substrate preferences of methanogen communities in anaerobic digesters. Appl Environ Microbiol 2014; 81:604-13. [PMID: 25381241 DOI: 10.1128/aem.02566-14] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Methanogenic archaea play a key role in biogas-producing anaerobic digestion and yet remain poorly taxonomically characterized. This is in part due to the limitations of low-throughput Sanger sequencing of a single (16S rRNA) gene, which in the past may have undersampled methanogen diversity. In this study, archaeal communities from three sludge digesters in Hong Kong and one wastewater digester in China were examined using high-throughput pyrosequencing of the methyl coenzyme M reductase (mcrA) and 16S rRNA genes. Methanobacteriales, Methanomicrobiales, and Methanosarcinales were detected in each digester, indicating that both hydrogenotrophic and acetoclastic methanogenesis was occurring. Two sludge digesters had similar community structures, likely due to their similar design and feedstock. Taxonomic classification of the mcrA genes suggested that these digesters were dominated by acetoclastic methanogens, particularly Methanosarcinales, while the other digesters were dominated by hydrogenotrophic Methanomicrobiales. The proposed euryarchaeotal order Methanomassiliicoccales and the uncultured WSA2 group were detected with the 16S rRNA gene, and potential mcrA genes for these groups were identified. 16S rRNA gene sequencing also recovered several crenarchaeotal groups potentially involved in the initial anaerobic digestion processes. Overall, the two genes produced different taxonomic profiles for the digesters, while greater methanogen richness was detected using the mcrA gene, supporting the use of this functional gene as a complement to the 16S rRNA gene to better assess methanogen diversity. A significant positive correlation was detected between methane production and the abundance of mcrA transcripts in digesters treating sludge and wastewater samples, supporting the mcrA gene as a biomarker for methane yield.
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44
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Kim YS, Westerholm M, Scherer P. Dual investigation of methanogenic processes by quantitative PCR and quantitative microscopic fingerprinting. FEMS Microbiol Lett 2014; 360:76-84. [PMID: 25175903 DOI: 10.1111/1574-6968.12592] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 08/20/2014] [Accepted: 08/26/2014] [Indexed: 01/03/2023] Open
Abstract
Monitoring of methanogenic communities in anaerobic digesters using molecular-based methods is very attractive but can be cost-intensive. A new and fast quantification method by microscopic image analysis was developed to accompany molecular-based methods. This digitalized method, called quantitative microscopic fingerprinting (QMF), enables quantification of active methanogenic cells (N mL(-1)) by their characteristic auto-fluorescence based on coenzyme F420 . QMF was applied to analyze the methanogenic communities in three biogas plant samples, and the results were compared with the relative proportion of gene copy numbers obtained with the quantitative PCR (qPCR). Analysis of QMF demonstrated dominance of Methanomicrobiales and Methanobacteriales in relation to the total methanogenic community in digesters operating at high ammonia concentrations, which corresponded to the results established by qPCR. Absolute microbial counts by QMF and the numbers obtained by qPCR were not always comparable. On the other hand, the restricted morphological analysis by QMF was enhanced by the capability of qPCR to identify microbes. Consequently, dual investigations of both methods are proposed to improve monitoring of anaerobic digesters. For a rough estimation of the methanogenic composition in anaerobic digesters, the QMF method seems to be a promising approach for the rapid detection of microbial changes.
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Affiliation(s)
- Yong Sung Kim
- Faculty Life Sciences, Hamburg University of Applied Sciences, Hamburg, Germany
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Wikandari R, Millati R, Cahyanto MN, Taherzadeh MJ. Biogas production from citrus waste by membrane bioreactor. MEMBRANES 2014; 4:596-607. [PMID: 25167328 PMCID: PMC4194050 DOI: 10.3390/membranes4030596] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Revised: 07/28/2014] [Accepted: 08/19/2014] [Indexed: 11/16/2022]
Abstract
Rapid acidification and inhibition by d-limonene are major challenges of biogas production from citrus waste. As limonene is a hydrophobic chemical, this challenge was encountered using hydrophilic polyvinylidine difluoride (PVDF) membranes in a biogas reactor. The more sensitive methane-producing archaea were encapsulated in the membranes, while freely suspended digesting bacteria were present in the culture as well. In this membrane bioreactor (MBR), the free digesting bacteria digested the citrus wastes and produced soluble compounds, which could pass through the membrane and converted to biogas by the encapsulated cell. As a control experiment, similar digestions were carried out in bioreactors containing the identical amount of just free cells. The experiments were carried out in thermophilic conditions at 55 °C, and hydraulic retention time of 30 days. The organic loading rate (OLR) was started with 0.3 kg VS/m3/day and gradually increased to 3 kg VS/m3/day. The results show that at the highest OLR, MBR was successful to produce methane at 0.33 Nm3/kg VS, while the traditional free cell reactor reduced its methane production to 0.05 Nm3/kg VS. Approximately 73% of the theoretical methane yield was achieved using the membrane bioreactor.
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Affiliation(s)
- Rachma Wikandari
- Swedish Centre for Resource Recovery, University of Borås, Allégatan 1, Borås 50190, Sweden.
| | - Ria Millati
- Department of Food and Agricultural Product Technology, Faculty of Agricultural Technology, Universitas Gadjah Mada, Bulaksumur, Yogyakarta 55281, Indonesia.
| | - Muhammad Nur Cahyanto
- Department of Food and Agricultural Product Technology, Faculty of Agricultural Technology, Universitas Gadjah Mada, Bulaksumur, Yogyakarta 55281, Indonesia.
| | - Mohammad J Taherzadeh
- Swedish Centre for Resource Recovery, University of Borås, Allégatan 1, Borås 50190, Sweden.
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Yang Y, Yu K, Xia Y, Lau FTK, Tang DTW, Fung WC, Fang HHP, Zhang T. Metagenomic analysis of sludge from full-scale anaerobic digesters operated in municipal wastewater treatment plants. Appl Microbiol Biotechnol 2014; 98:5709-18. [PMID: 24633414 DOI: 10.1007/s00253-014-5648-0] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 02/24/2014] [Accepted: 02/26/2014] [Indexed: 01/07/2023]
Abstract
This study applied Illumina high-throughput sequencing to explore the microbial communities and functions in anaerobic digestion sludge (ADS) from two wastewater treatment plants based on a metagenomic view. Taxonomic analysis using SILVA SSU database indicated that Proteobacteria (9.52-13.50 %), Bacteroidetes (7.18 %-10.65 %) and Firmicutes (7.53 %-9.46 %) were the most abundant phyla in the ADS. Differences of microbial communities between the two types of ADS were identified. Genera of Methanosaeta and Methanosarcina were the major methanogens. Functional analysis by SEED subsystems showed that the basic metabolic functions of metagenomes in the four ADS samples had no significant difference among them, but they were different from other microbial communities from activated sludge, human faeces, ocean and soil. Abundances of genes in methanogenesis pathway were also quantified using a methanogenesis genes database extracted from KEGG. Results showed that acetotrophic was the major methanogenic pathway in the anaerobic sludge digestion.
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Affiliation(s)
- Ying Yang
- Environmental Biotechnology Laboratory, Department of Civil Engineering, University of Hong Kong, Hong Kong, China
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Lins P, Reitschuler C, Illmer P. Methanosarcina spp., the key to relieve the start-up of a thermophilic anaerobic digestion suffering from high acetic acid loads. BIORESOURCE TECHNOLOGY 2013; 152:347-354. [PMID: 24315939 DOI: 10.1016/j.biortech.2013.11.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 11/05/2013] [Accepted: 11/11/2013] [Indexed: 06/02/2023]
Abstract
This paper investigates if it is possible to produce inocula to counteract high acetic acid (CH3COO(-)) concentrations during thermophilic anaerobic digestion. To this end, fermenter sludge was exposed for different durations to either gradually increasing CH3COO(-) concentrations or directly exposed to a high concentration (150 mM). Altogether, these enrichments led to inocula with a distinct decrease of representatives of Methanobacteriales, while those of Methanoculleus spp. were hardly affected by any treatment. After the inoculation, good agreements of the abundance of Methanosarcinales and Methanoculleus spp. with total DNA content and methane production rate were apparent. In addition, a gradual adaptation of the inoculum for at least 4 weeks led to a significant increase of Methanosarcina spp. during the subsequent fermentation. These results demonstrate the potential of bioaugmentation to relieve the start-up of an anaerobic digestion suffering from high CH3COO(-) loads, especially pointing to the robust acetoclastic genus Methanosarcina.
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Affiliation(s)
- Philipp Lins
- University of Innsbruck, Institute of Microbiology, Technikerstr. 25, A-6020 Innsbruck, Austria.
| | - Christoph Reitschuler
- University of Innsbruck, Institute of Microbiology, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Paul Illmer
- University of Innsbruck, Institute of Microbiology, Technikerstr. 25, A-6020 Innsbruck, Austria
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48
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Morris R, Schauer-Gimenez A, Bhattad U, Kearney C, Struble CA, Zitomer D, Maki JS. Methyl coenzyme M reductase (mcrA) gene abundance correlates with activity measurements of methanogenic H₂ /CO₂ -enriched anaerobic biomass. Microb Biotechnol 2013; 7:77-84. [PMID: 24320083 PMCID: PMC3896932 DOI: 10.1111/1751-7915.12094] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 09/22/2013] [Indexed: 12/02/2022] Open
Abstract
Biologically produced methane (CH4) from anaerobic digesters is a renewable alternative to fossil fuels, but digester failure can be a serious problem. Monitoring the microbial community within the digester could provide valuable information about process stability because this technology is dependent upon the metabolic processes of microorganisms. A healthy methanogenic community is critical for digester function and CH4 production. Methanogens can be surveyed and monitored using genes and transcripts of mcrA, which encodes the α subunit of methyl coenzyme M reductase – the enzyme that catalyses the final step in methanogenesis. Using clone libraries and quantitative polymerase chain reaction, we compared the diversity and abundance of mcrA genes and transcripts in four different methanogenic hydrogen/CO2 enrichment cultures to function, as measured by specific methanogenic activity (SMA) assays using H2/CO2. The mcrA gene copy number significantly correlated with CH4 production rates using H2/CO2, while correlations between mcrA transcript number and SMA were not significant. The DNA and cDNA clone libraries from all enrichments were distinctive but community diversity also did not correlate with SMA. Although hydrogenotrophic methanogens dominated these enrichments, the results indicate that this methodology should be applicable to monitoring other methanogenic communities in anaerobic digesters. Ultimately, this could lead to the engineering of digester microbial communities to produce more CH4 for use as renewable fuel.
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Affiliation(s)
- Rachel Morris
- Department of Biological Sciences, Marquette University, Milwaukee, WI, 53201-1881, USA
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