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Syntrophic acetate oxidation in industrial CSTR biogas digesters

Paper ID Volume ID Publish Year Pages File Format Full-Text
23253 43424 2014 6 PDF Available
Title
Syntrophic acetate oxidation in industrial CSTR biogas digesters
Abstract

•10 out of 13 randomly selected biogas plants showed syntrophic acetate oxidation (SAO).•High SAO bacteria (SAOB) abundance despite differences in operation parameters.•Stable levels of SAOB under variable operating conditions.•SAOB correlated positively with low abundance of aceticlastic methanogens.•The thermophilic SAOB T. phaeum correlated with high ammonia levels.

The extent of syntrophic acetate oxidation (SAO) and the levels of known SAO bacteria and acetate- and hydrogen-consuming methanogens were determined in sludge from 13 commercial biogas production plants. Results from these measurements were statistically related to the prevailing operating conditions, through partial least squares (PLS) analysis. This revealed that high abundance of microorganisms involved in SAO was positively correlated with relatively low abundance of aceticlastic methanogens and high concentrations of free ammonia (>160 mg/L) and volatile fatty acids (VFA). Temperature was identified as another influencing factor for the population structure of the syntrophic acetate oxidising bacteria (SAOB). Overall, there was a high abundance of SAOB in the different digesters despite differences in their operating parameters, indicating that SAOB are an enduring and important component of biogas-producing consortia.

Keywords
Syntrophic acetate oxidising bacteria; Methanogens; Industrial biogas production; Operating parameters
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 171, 10 February 2014, Pages 39–44
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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