混合硫酸盐还原菌群还原Cr(Ⅵ)的初步研究

Primary Study on Reduction of Cr(Ⅵ) by Mixed Sulfate-Reducing Bacteria

利用驯化后的耐受Cr(Ⅵ)的混合硫酸盐还原菌群处理含Cr(Ⅵ)废水,探讨了pH值、培养温度等对Cr(Ⅵ)去除率的影响。结果表明,当Cr(Ⅵ)浓度为50 mg.L-1、pH值为7.0、培养温度为36℃、培养时间为36 h时,该混合菌群对Cr(Ⅵ)的去除率达到最高,为97.6%。该混合菌群能适应较宽的pH值和温度范围且处理效率高、性能稳定,有望成为处理高浓度含Cr(Ⅵ)废水的理想方法。

In this paper,the mixed sulfate-reducing bacteria（SRB） were used to treat the wastewater containing Cr（Ⅵ）.The effects of pH value and cultural temperature on removal rate of Cr（Ⅵ） were investigated.The results showed that the removal rate of Cr（Ⅵ） reached 97.6% with Cr（Ⅵ） concentration of 50 mg·L-1,pH value of 7.0,cultural temperature of 36 ℃,cultural time of 36 h.The mixed SRB expected to play an important role in treating high concentrations of wastewater containing Cr（Ⅵ） because of its wider range of pH value and temperature,high efficiency,stable performance.