Microbial Community Shifts during Biogas Production from Biowaste and/or Propionate
AbstractPropionate is the most delicate intermediate during anaerobic digestion as its degradation is thermodynamically unfavorable. To determine its maximum possible degradation rates during anaerobic digestion, a reactor was fed Monday to Friday with an organic loading rate (OLR) of 12/14 kg CODbiowaste·m−3·d−1 plus propionate up to a final OLR of 18 kg COD·m−3·d−1. No feed was supplied on weekends as it was the case in full-scale. To maintain permanently high propionate oxidizing activity (POA), a basic OLR of 3 kg CODpropionate·m−3·d−1 all week + 11 kg CODbiowaste·m−3·d−1 from Monday to Friday was supplied. Finally a reactor was operated with an OLR of 12 kg CODbiowaste·m−3·d−1 from Monday to Friday and 5 kg CODpropionate·m−3·d−1 from Friday night to Monday morning to maintain a constant gas production for permanent operation of a gas engine. The propionate degradation rates (PDRs) were determined for biowaste + propionate feeding. Decreasing PDRs during starvation were analyzed. The POA was higher after propionate supply than after biowaste feeding and decreased faster during starvation of a propionate-fed rather than a biowaste-fed inoculum. Shifts of the propionate-oxidizing and methanogenic community were determined. View Full-Text
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Li, C.; Moertelmaier, C.; Winter, J.; Gallert, C. Microbial Community Shifts during Biogas Production from Biowaste and/or Propionate. Bioengineering 2015, 2, 35-53.
Li C, Moertelmaier C, Winter J, Gallert C. Microbial Community Shifts during Biogas Production from Biowaste and/or Propionate. Bioengineering. 2015; 2(1):35-53.Chicago/Turabian Style
Li, Chaoran; Moertelmaier, Christoph; Winter, Josef; Gallert, Claudia. 2015. "Microbial Community Shifts during Biogas Production from Biowaste and/or Propionate." Bioengineering 2, no. 1: 35-53.