Syntrophic acetate oxidation in industrial CSTR biogas digesters
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- 作者：Li Sun ; Bettina M眉ller ; Maria Westerholm ; Anna Schn眉rer
- 关键词：Syntrophic acetate oxidising bacteria ; Methanogens ; Industrial biogas production ; Operating parameters
- 刊名：Journal of Biotechnology
- 出版年：10 February, 2014
- 年：2014
- 卷：171
- 期：Complete
- 页码：39-44
- 全文大小：815 K
文摘
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.