EGSB反应器中硫酸盐还原与重金属去除  

Biological Reduction of Sulfate and Removal of Heavy Metals in an Expanded Granular Sludge Blanket Reactor

作　　者：苏冰琴[1] 李亚新[1] 

机构地区：[1]太原理工大学环境科学与工程学院,山西太原030024

出　　处：《中国矿业大学学报》2008年第2期246-249,共4页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50278060);山西省留学归国人员基金项目(2002-19);山西省自然科学基金项目(2006011044)

摘　　要：分析了利用硫酸盐还原菌对含硫酸盐和重金属铁、锰、镍、锌、铜废水的生物处理技术,采用小试规模的厌氧膨胀颗粒污泥床(EGSB)反应器,研究了SO42-生物还原和重金属去除的相关关系.结果表明:SO42-生物还原生成硫化氢,可有效地促进重金属转化为稳定的硫化物沉淀形态.当进水Fe3+,Mn2+,Ni2+,Zn2+,Cu2+的质量浓度分别为40,8,10,4,4 mg/L时,其相应的最大去除率可分别达到95.3%,93.1%,98.2%,89.9%,95.6%;同时液体表面上升流速和pH值对重金属的去除产生影响,反应器上升流速vup<4.5 m/h时,金属离子的去除率随着上升流速vup的提高逐渐增大,vup>5.0 m/h时,金属离子的去除率出现降低趋势;随着反应器出水pH值增大,金属去除率逐渐增大.We investigated a biological treatment technique of this waste water by using sulphate reducing bacteria（SRB）. At the scale of a laboratory experiment, the relationship between biological reduction of sulfate and removal of heavy metals （Fe, Mn, Ni, Zn, Cu） was conducted in a expanded granular sludge blanket （EGSB） reactor. The results show that a SO4^2- biological reduction can produce H2S and promote the formation of heavy metals into stable metal sulfide sediments. With effective concentrations of Fe^3＋, Mn^2＋, Ni^2＋, Zn^2＋ and Cu^2＋ of 40, 8, 10, 4 and 4 mg/L, respectively, the corresponding maximum removal rates were 95.3%, 93.1%, 98.2% 89.9% and 95.6%. Vup and pH values affect the removal of heavy metal removal, its efficiency increases when Vup〈4. 5 m/h, but this efficiency tends to decline when Vup〉5.0 m/h. The efficiency of metal removal increases with an increase in the pH of the effluent.

关 键 词：厌氧膨胀颗粒污泥床反应器 硫酸盐还原菌 硫酸盐生物还原 重金属去除 

分 类 号：X703.1[环境科学与工程—环境工程]