ArticleMicrobial ecology2011
Distinctive responses of metabolically active microbiota to acidification in a thermophilic anaerobic digester.
Article in Microbial ecology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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Who cites it
15 citing papers in PubMed, 99 citations in OpenAlex.
- Strategies for recovery of imbalanced full-scale biogas reactor feeding with palm oil mill effluent.PeerJ · 2021Article
- Microbiological Surveillance of Biogas Plants: Targeting Acetogenic Community.Frontiers in microbiology · 2021Article
- Synergistic effects of co-trace elements on anaerobic co-digestion of food waste and sewage sludge at high organic load.Environmental science and pollution research international · 2020Article
- Soil-Derived Inocula Enhance Methane Production and Counteract Common Process Failures During Anaerobic Digestion.Frontiers in microbiology · 2020Article
- A Methanogenic Consortium Was Active and Exhibited Long-Term Survival in an Extremely Acidified Thermophilic Bioreactor.Frontiers in microbiology · 2019Article
- A Review of the Processes, Parameters, and Optimization of Anaerobic Digestion.International journal of environmental research and public health · 2018Review
- Assessing Methanogenic Archaeal Community in Full Scale Anaerobic Sludge Digester Systems in Dubai, United Arab Emirates.The open microbiology journal · 2018Article
- Comparison of microbial communities during the anaerobic digestion of Gracilaria under mesophilic and thermophilic conditions.World journal of microbiology & biotechnology · 2016Article
- Isolation of microorganisms involved in reduction of crystalline iron(III) oxides in natural environments.Frontiers in microbiology · 2015Article
- Microbial community dynamics in replicate anaerobic digesters exposed sequentially to increasing organic loading rate, acidosis, and process recovery.Biotechnology for biofuels · 2015Article
- Novel molecular markers for the detection of methanogens and phylogenetic analyses of methanogenic communities.Frontiers in microbiology · 2015Article
- Investigation into the effect of high concentrations of volatile fatty acids in anaerobic digestion on methanogenic communities.Waste management (New York, N.Y.) · 2014Article
- Inhibitory effects of ferrihydrite on a thermophilic methanogenic community.Microbes and environments · 2014Article
- Candidatus Methanogranum caenicola: a novel methanogen from the anaerobic digested sludge, and proposal of Methanomassiliicoccaceae fam. nov. and Methanomassiliicoccales ord. nov., for a methanogenic lineage of the class Thermoplasmata.Microbes and environments · 2013Article
- Distribution of CO(2) fixation and acetate mineralization pathways in microorganisms from extremophilic anaerobic biotopes.Extremophiles : life under extreme conditions · 2012Review
Corrections and comments
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Authors and funding
6 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Acidification is one of the most common and serious problems inducing process failure in anaerobic digesters. The production of volatile fatty acids (VFAs) mainly triggers acidic shock. However, little is known about the bacteria involved in the processes of acidogenic metabolism, such as fermentation and reductive acetogenesis. Here, the metabolic responses of a methanogenic community to the acidification and resulting process deterioration were investigated using transcriptional profiling of both the 16S rRNA and formyltetrahydrofolate synthetase (FTHFS) genes. The 16S rRNA-based analyses demonstrated that the dynamic shift of bacterial populations was closely correlated with reactor performance, especially with VFA accumulation levels. The pH drop accompanied by an increase in VFAs stimulated the metabolic activation of an uncultured Chloroflexi subphylum I bacterium. The subphylum has been characterized as a fermentative carbohydrate degrader using culture- and molecular-based ecophysiological assays. At the beginning of VFA accumulation, FTHFS genes were expressed; the transcripts were derived from phylogenetically predicted homoacetogens, suggesting that reductive acetogenesis was operated by hitherto unidentified bacteria. When acetate concentrations were high, the FTHFS expression ceased and Thermoanaerobacterium aciditolerans proliferated selectively. This thermoacidophilic bacterium would play a decisive role in acetate production via fermentative metabolism. The results of this study reveal for the first time that an uncultured Chloroflexi, T. aciditolerans, and novel homoacetogens were metabolically associated with acidic shock and subsequent VFA accumulation in an anaerobic digester.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.