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Lookup NU author(s): Dr Jan DolfingORCiD,
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
© 2019 Elsevier Ltd Anaerobic digestion of organic matter is the major route of biomethane production. However, in the presence of sulfate, sulfate-reducing bacteria (SRB) typically outcompete methanogens, which may reduce or even preclude methane production from sulfate-containing wastewaters. Although sulfate-reduction and methanogenesis can occur simultaneously, our limited understanding of the microbiology of anaerobic digesters treating sulfate-containing wastewaters constrains improvements in the production of methane from these systems. This study tested the effects of carbon sources and chemical oxygen demand-to-sulfate ratio (COD/SO 4 2− ) on the diversity and interactions of SRB and methanogens in an anaerobic digester treating a high-sulfate waste stream. Overall, the data showed that sulfate removal and methane generation occurred in varying efficiencies and the carbon source had limited effect on the methane yield. Importantly, the results demonstrated that methanogenic and SRB diversities were only affected by the carbon source and not by the COD/SO 4 2− ratio.
Author(s): Cetecioglu Z, Dolfing J, Taylor J, Purdy KJ, Eyice O
Publication type: Article
Publication status: Published
Journal: Water Research
Print publication date: 15/05/2019
Online publication date: 04/03/2019
Acceptance date: 21/02/2019
Date deposited: 02/05/2019
ISSN (print): 0043-1354
ISSN (electronic): 1879-2448
Publisher: Elsevier Ltd
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