Acetate-fed anaerobic sequential batch experiments with four different inhibitory conditions (non-inhibitory (Lo), sodium-ion inhibitory (Na), ammonia inhibitory (Am), combined inhibitory (Hi)) were conducted using thirteen different inocula to investigate the inhibition effects by sodium-ion and ammonia and different inocula on acetate-utilizing methanogenesis and succession of methanogens. Sodium-ion and ammonia significantly extended lag-time λ and reduced specific-methanogenic-activity R, and caused synergistic inhibition. The inhibition differed according to the initial methanogen community structures: the inhibition effects on λ and R were strongest ininocula with Methanosaeta concilii dominant and weakest in inocula with Methanoculleus bourgensis dominant. These inhibitory conditions determined the succession of methanogens: the most competitive methanogens were Methanosaeta concilii in Lo, Methanosarcina sp. in Na, Methanosarcina sp. and Methanoculleus bourgensis in Am, Methanoculleus bourgensis in Hi. This study provides valuable information for microbial management and optimization for AD processes treating wastewater that is rich in protein and/or salt.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.biortech.2021.125202 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Positive effects of appropriate micro-aeration on landfill stabilization: Mitigating ammonia and VFAs accumulation.
Bioresour Technol
December 2024
Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China. Electronic address:
Article Synopsis
- * A specific micro-aeration rate of 0.05 L/(h·kg) significantly boosted the production of volatile fatty acids and reduced nitrogen levels by 22.1%, improving organic matter breakdown efficiency by 55.5%.
- * The research also found that this micro-aeration method enhanced the diversity and presence of beneficial bacteria and archaea, leading to a faster and more effective landfill stabilization process with positive environmental and economic implications.
Succession from acetoclastic to hydrogenotrophic microbial community during sewage sludge anaerobic digestion for bioenergy production.
Biotechnol Lett
December 2024
Department of Sanitary and Environmental Engineering, Rio de Janeiro State University, Rio de Janeiro, Brazil.
To assess microbial dynamics during anaerobic digestion (AD) of sewage sludge (SWS) from a municipal Wastewater Treatment Plant (WWTP), a Biochemical Methane Potential (BMP) assay at 37 °C under mono-digestion conditions was conducted. Utilizing the Illumina MiSeq platform, 16S ribosomal RNA (rRNA) gene sequencing unveiled a core bacterial community in the solid material, showcasing notable variations in profiles. The research investigates changes in microbial communities and metabolic pathways to understand their impact on the efficiency of the digestion process.
View Article and Find Full Text PDFStructural and functional characterization of archaeal DIMT1 unveils distinct protein dynamics essential for efficient catalysis.
Structure
October 2024
Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India. Electronic address:
Dimethyladenosine transferase 1 (DIMT1), an ortholog of bacterial KsgA is a conserved protein that assists in ribosome biogenesis by modifying two successive adenosine bases near the 3' end of small subunit (SSU) rRNA. Although KsgA/DIMT1 proteins have been characterized in bacteria and eukaryotes, they are yet unexplored in archaea. Also, their dynamics are not well understood.
View Article and Find Full Text PDFEvolution mechanism of microbial community structure and metabolic activity in aquatic nutrient-poor sedimentary environments driven by 17β-estradiol pollution.
Environ Sci Pollut Res Int
August 2024
The National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing, 210098, China.
Article Synopsis
- 17β-Estradiol (E2) is identified as a widespread micro-pollutant in aquatic environments with toxic effects on aquatic life, but its specific impact on microorganisms remains unclear.
- A laboratory simulation was created to study how different concentrations of E2 affect the carbon metabolism activity of water microorganisms, focusing on their gas emission rates.
- The findings indicate that E2 alters the community structure and metabolic functions of bacteria and archaea, while indirectly inhibiting methane production by primarily affecting these groups, thus enhancing understanding of estrogen effects on ecosystem carbon metabolism.
Vadose-zone characteristic pollutants distribution, microbial community structure and functionality changes in response to long-term leachate pollution of an informal landfill site.
Sci Total Environ
October 2024
Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; College of New Energy and Environment, Jilin University, Changchun 130021, China; Institute of Water Resources and Environment, Jilin University, Changchun 130021, China. Electronic address:
The study embarked on a comprehensive examination of the evolution and diversity of microorganisms within long-term leachate pollution environments, with a focus on varying depths and levels of contamination, and its linkage to soil characteristics and the presence of heavy metals. It was observed that microbial diversity presented distinct cross-depth trend, where archaeal communities were found to be particularly sensitive to alterations in soil depth. Noteworthily, Euryarchaeota increased by 4.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!