Essays about: "methanogens"
Showing result 1 - 5 of 16 essays containing the word methanogens.
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1. Methanobacterium cauma sp. nov., a hydrogenotrophic, halotolerant methanogen from an active serpintinization system at Chimaera seep
University essay from Uppsala universitet/Institutionen för biologisk grundutbildningAbstract : The archaeal branch of life represents some of the oldest life forms on Earth. Archaea are believed to have diverged from Prokaryotes roughly 3.5 billion years ago and it’s theorized that biological methane production started around this time as well. This would make methanogenesis one of the oldest metabolisms on our planet. READ MORE
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2. Isolation of an ammonia-tolerant syntrophic butyrate-oxidizing bacterium originating from a thermophilic biogas digester
University essay from Uppsala universitet/Institutionen för biologisk grundutbildningAbstract : Syntrophic relationships between fatty acid degrading bacteria and hydrogenotrophic methanogens are important for a well-functioning anaerobic degradation process during biogas production from organic waste material. This is particularly important in biogas processes fed protein-rich material as their degradation gives rise to high levels of ammonia, which inhibits many microorganisms. READ MORE
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3. Optimization of a two-step anaerobic treatment of wastewater from the Pulp and Paper Industry
University essay from KTH/Industriell bioteknologiAbstract : Under de senaste 30 åren så har antalet massa- och pappersbruk minskat medan den totala produktionen av massa och papper har ökat. En högre produktion per bruk tillsammans med en hårdare miljölagstiftning, sätter ett högre tryck på vattenreningen på varje bruk. READ MORE
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4. Stabilizing biogas processes at high ammonia : effects of acetate pulse-feeding on the microbial population
University essay from SLU/Department of Molecular SciencesAbstract : This study investigated the problem of ammonia inhibition in biogas reactors, commonly occurring when protein rich substrates are used in anaerobic digestion processes. Ammonia inhibition is one of the foremost causes of failure in anaerobic digestion, leading to process instability, with symptoms commonly expressed as; reduction in biogas produced, decreased methane content in the gas and accumulation of volatile fatty acids. READ MORE
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5. Investigating the methane producing pathway in lab-scale biogas reactors subjected to sequential increase of ammonium and daily acetate-pulsing
University essay from Linköpings universitet/Institutionen för fysik, kemi och biologiAbstract : Syntrophic acetate oxidizing bacteria convert acetate into hydrogen and carbon dioxide and through the mutualistic syntrophic partnership with methanogens the products are further converted to methane in biogas processes operating at high ammonia concentrations. There is very little known about SAOBs, only five have been characterized and had their genome analyzed. READ MORE