硫酸盐还原菌复合碳源的筛选

Screening of Complex Carbon Source of Sulfate Reducing Bacteria

利用硫酸盐还原菌(Sulfate-Reducing Bacteria,SRB)的生物法可以有效去除酸法地浸采铀地下水中的硫酸根和重金属离子,是一种有发展潜力的酸法地浸采铀地下水修复技术。酸法地浸采铀地下水中的有机物含量较低,无法满足硫酸盐还原菌的生长代谢,需要向其提供充足的碳源。通过复合碳源筛选试验,发现混合比为10∶1的玉米芯和牛粪混合发酵液能够满足SRB生长代谢的需要,且该复合碳源能被SRB充分利用而不增加处理后酸法地浸采铀地下水的COD,可以作为生物法修复酸法地浸采铀地下水的SRB碳源。

The biological method using sulfate-reducing bacteria(SRB)can effectively remove sulfate and heavy metal ions from the groundwater of in-situ leaching uranium by acid method,which is a potential groundwater remediation technology for uranium in-situ leaching by acid method.The organic matter content in groundwater of leaching uranium by acid method is low,which can not meet the growth and metabolism of sulfate reducing bacteria,so it needs to provide sufficient carbon source for them.By screening tests of composite carbon source,found that the corn cob and cow dung mixed fermentation liquid of 10∶1 blending ratio can meet the needs of the growth of SRB metabolism,the SRB composite carbon source can be fully used without increasing COD of groundwater after treatment,and can be used as SRB carbon source for biological repair method of groundwater of in-situ leaching uranium by acid method.