产甲烷
硫酸盐
厌氧消化
甲烷
沼气
硫酸盐还原菌
化学
环境化学
化学需氧量
制浆造纸工业
环境科学
环境工程
废物管理
废水
工程类
有机化学
作者
Zeynep Cetecioglu,Jan Dolfing,Jessica Averitt Taylor,Kevin J. Purdy,Özge Eyice
标识
DOI:10.1016/j.watres.2019.02.038
摘要
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/SO42−) 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/SO42− ratio.
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