The role of hydrogenotrophic methanogens in an acidogenic reactor
Ng, Wun Jern
Date of Issue2014
School of Civil and Environmental Engineering
Nanyang Environment and Water Research Institute
Singapore National Environmental Agency
A laboratory-scale acidogenic anaerobic sequencing batch reactor was set up to test the effect of pH change on microbial community structure of the reactor biomass and process performance. No immediate performance change on acidogenesis was observed after the pH change. However, as the hydrogenotrophic methanogen population decreased, hydrogen content in biogas increased followed by a sharp decrease in volatile fatty acids (VFAs) with acetic acid (HAc) in particular. Recovery of reactor performance following pH correction was only apparent after recovery of hydrogenotrophic methanogen population. These suggested hydrogenotrophic methanogens played a very important role in performance of the acidogenic process.
DRNTU::Engineering::Environmental engineering::Water treatment
© 2014 Elsevier Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Chemosphere, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.chemosphere.2014.10.047].