Next Article in Journal / Special Issue
Mitigation of Humic Acid Inhibition in Anaerobic Digestion of Cellulose by Addition of Various Salts
Previous Article in Journal
Electroactive Tissue Scaffolds with Aligned Pores as Instructive Platforms for Biomimetic Tissue Engineering
Previous Article in Special Issue
Special Issue on “Microbial Ecology of Anaerobic Digestion”
Article Menu

Export Article

Open AccessArticle
Bioengineering 2015, 2(1), 35-53; doi:10.3390/bioengineering2010035

Microbial Community Shifts during Biogas Production from Biowaste and/or Propionate

1
Institute of Biology for Engineers and Biotechnology of Wastewater, Karlsruhe Institute of Technology (KIT), Am Fasanengarten, Karlsruhe D-76128, Germany
2
Division Microbiology-Biotechnology, Faculty of Technology, University of Applied Science, Hochschule Emden-Leer, Constantiaplatz 4, Emden D-26723, Germany
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Sabine Kleinsteuber
Received: 6 November 2014 / Revised: 29 January 2015 / Accepted: 30 January 2015 / Published: 9 February 2015
(This article belongs to the Special Issue Microbial Ecology of Anaerobic Digestion)
View Full-Text   |   Download PDF [798 KB, uploaded 9 February 2015]   |  

Abstract

Propionate 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
Keywords: anaerobic co-digestion; biowaste; propionate; propionate-oxidizing bacteria (POB); methanogenic community; community shifts anaerobic co-digestion; biowaste; propionate; propionate-oxidizing bacteria (POB); methanogenic community; community shifts
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Li, C.; Moertelmaier, C.; Winter, J.; Gallert, C. Microbial Community Shifts during Biogas Production from Biowaste and/or Propionate. Bioengineering 2015, 2, 35-53.

Show more citation formats Show less citations formats

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Bioengineering EISSN 2306-5354 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top