硫酸盐还原菌与单质铁协同作用处理酸性含锌废水  

Treatment of acid zinc wastewater by sulfate reducing bacteria cooperated with iron

作　　者：常晓雷[1] 康勇[1] 冯颖[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《中国有色金属学报》2006年第9期1647-1652,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(C20106014)

摘　　要：研究利用硫酸盐还原菌（sulfate reducing bacteria，SRB）与单质铁协同作用处理含Zn^2＋废水的效果和相应机理。采用间歇式生物反应器，在Zn^2＋名义浓度为0～90mg／L范围内，分别考察SRB和SRB＋Fe^0两种体系的处理效果。实验表明：SRB＋Fe^0体系的处理效果明显优于SRB体系；加入单质铁之后，高Zn^2＋浓度下（〉75mg／L）SRB适应期缩短20％以上；Zn^2＋对SRB的抑制浓度提高约20％；硫酸盐还原速率明显加快，硫酸盐最终还原率以及Zn^2＋的去除速率都有所提高。分析了单质铁对废水处理过程的强化机理，确定Zn^2＋的去除形式主要为硫化物沉淀。The treatment of wastewater containing Zn^2＋ by sulfate reducing bacteria cooperated with Fe^0 was studied. Two systems of SRB and SRB＋Fe^0 were experimented in batch bioreactor, with Zn^2＋ concentration in the range of 0 - 90 mg/L. The results show that the SRB＋Fe^0 system performs much better than SRB system. With the presence of iron, the acclimation period of SRB reduces more than 20% under high Zn^2＋ concentration; the inhibiting concentration of Zn^2＋ to SRB increases by approximately 20% ; the reduction velocity of sulfate is fastened apparently, meanwhile the ultimate sulfate reduction rate and Zn^2＋ removal rate are improved to a certain extent. The enhancement principle of iron was analyzed and it is concluded that the removal of Zn^2＋ is mainly in terms of sulfide precipitate.

关 键 词：单质铁 酸性含锌废水 硫酸盐还原菌 

分 类 号：X751[环境科学与工程—环境工程]