Topic
Methanogen
About: Methanogen is a research topic. Over the lifetime, 1146 publications have been published within this topic receiving 48254 citations.
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TL;DR: A positive and significant correlation between the biogas production rate and methanogen abundance was observed and the applied method is suitable to describe microbiome into the anaerobic reactor, moreover methanogens concentration may have potential for use as a digestion optimisation tool.
87 citations
TL;DR: A novel method of two-phase anaerobic digestion where the acid reactor is operated at low pH 4.0 was proposed and investigated to examine the possibility of efficient degradation of lactate and to identify their optimal operating conditions.
87 citations
TL;DR: A new genus of methanogenic bacteria (MethanohAlophilus) comprising a single species, Methanohalophilus mahii sp.
Abstract: A new genus of methanogenic bacteria (Methanohalophilus) comprising a single species, Methanohalophilus mahii sp. nov., is described. The microorganisms of this genus require sodium chloride concentrations in the moderately halophilic range of 1.0 to 2.5 M for optimal growth and methanogenesis. Methanol and methylamines are the substrates that are utilized for growth. M. mahii is a methanogenic coccoid microorganism isolated from the sediments of the Great Salt Lake. The optimum temperature and salinity for growth and methanogenesis were 37°C and 2.0 M NaCI, respectively. The description is based on a single strain, strain SLP (= ATCC 35705), which is thus the type strain.
87 citations
TL;DR: In this paper, the authors examined the biological conversion of CO2 to CH4 using hydrogenotrophic methanogens in a fixed bed reactor inoculated with anaerobic mixed culture from the anaerobacterial digestor of a sewage treatment plant.
Abstract: BACKGROUND: Biological conversion of CO2 to useful carbonic compounds such as methane is a potentially attractive technology for reducing its concentration in the atmosphere One of the advantages of this technology over chemical conversion is that it requires much lower energy for reduction of CO2 In this article, biological conversion of CO2 to CH4 using hydrogenotrophic methanogens was examined in a fixed bed reactor inoculated with anaerobic mixed culture from the anaerobic digestor of a sewage treatment plant
RESULTS: Methane formation commenced on the first day of operation of the fixed bed reactor CO2 fed to the reactor was reduced with H2 by hydrogenotrophic methanogens The feed ratio of CO2 to H2 is an important factor in determining the conversion rate of CO2 When the feed ratio is 4, methane is produced at the expected rate according to the chemical equation The CO2 conversion rate was 100% when the gas retention time was 38 h in the fixed bed reactor
CONCLUSIONS: The results show that the fixed bed reactor employing hydrogentrophic methanogens has the potential to be effective in converting CO2 to CH4 with a conversion rate of 100% at 38 h retention time Copyright © 2012 Society of Chemical Industry
87 citations
TL;DR: In this article, the effects of combined calcium peroxide (CaO2) and microwave pretreatment on anaerobic digestion of waste activated sludge, lab-scale experiments were conducted to measure the solubilization, biodegradation, and dewaterability of the waste activation sludge.
86 citations