pH、盐度对微生物还原硫酸盐的影响研究  

Effect of pH and salinity on sulfate reduction by microorganism

作　　者：吴文菲[1] 刘波[1] 李红军 李松[1] 陈泽智[1] 

机构地区：[1]南京大学环境学院污染控制与资源化研究国家重点实验室,南京210093 [2]中环(中国)工程有限公司,南京210008

出　　处：《环境工程学报》2011年第11期2527-2531,共5页Chinese Journal of Environmental Engineering

基　　金：水处理与水环境修复教育部工程研究中心开放课题基金项目(WTWER0719)

摘　　要：采用厌氧生物处理工艺,研究了在不同盐度下pH连续降低对硫酸盐还原和有机物去除率的影响。实验结果表明,硫酸盐还原菌有很强的适应pH变化的能力,在pH值达到4以下仍有60%的硫酸盐去除率。NaCl浓度由4 g/L增加到50 g/L抑制了各厌氧菌的活性,导致硫酸盐和有机物去除率的下降,但硫酸盐还原菌耐受性高于产甲烷菌等其他厌氧菌,在NaCl浓度为50 g/L下,硫酸盐去除率能达到50%,而有机物去除率则低于30%。qRT-PCR表明了系统菌落中SRB随着环境的变化情况与化学指标结果相一致,该反应器体系中SRB在整个厌氧菌群落中只占了很小部分。In order to investigate the effects of salinity and pH on sulfate reduction and COD removal, an anaerobic technology was used. The result indicated that sulfate reduction efficiency could still reach 60% even when pH under 4, and the SRB had the strong adaptability to pH. The increase in influent NaC1 concentration from 4 g/L to 50 g/L inhibited the activity of all anaerobe and resulted in the decrease of the sulfate reduction efficiency and COD removal. The sulfate and COD removal rates were 50% and less than 30% , respectively when NaC1 concentration was 50 g/L. The research revealed that the SRB had higher tolerance to salinity than methanogen and other anaerobe. The result showed that by quantitative real time PCR was consistent with the sulfate reduction and COD removal, at the same time, it also showed that the proportion of SRB in the general communi- ty occupied a little part.

关 键 词：硫酸盐还原菌 PH 盐度 实时定量PCR 

分 类 号：X703[环境科学与工程—环境工程]