COD/sulfate ratio does not affect the methane yield and microbial diversity in anaerobic digesters
COD/sulfate ratio does not affect the methane yield and microbial diversity in anaerobic digesters
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DOI：
10.1016/j.watres.2019.02.038
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发表时间：
2019-05-15
期刊：
影响因子：
12.8
通讯作者：
Eyice, Ozge
中科院分区：
文献类型：
--
作者：
Cetecioglu, Zeynep;Dolfing, Jan;Eyice, Ozge
有机物的厌氧消化是生物甲烷生产的主要途径。然而，在硫酸盐存在的情况下，硫酸盐还原细菌（SRB）通常会胜过产甲烷菌，后者可能会减少甚至阻止含硫酸盐废水产生甲烷。虽然硫酸盐还原和甲烷生成可以同时发生，但我们对厌氧消化池处理含硫酸盐废水的微生物学的有限理解限制了这些系统中甲烷生产的改进。本研究测试了碳源和化学需氧量与硫酸盐比（COD/SO42-）对厌氧沼气池处理高硫酸盐废水中SRB和产甲烷菌多样性和相互作用的影响。总体而言，数据表明硫酸盐去除和甲烷生成的效率不同，碳源对甲烷产量的影响有限。重要的是，结果表明产甲烷和SRB多样性仅受碳源的影响，而不受COD/SO42-比的影响。(C) 2019 Elsevier Ltd.版权所有。
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. (C) 2019 Elsevier Ltd. All rights reserved.