硫酸盐还原菌处理低浓度含镉废水的试验研究  

Treatment of Low Concentration Cadmium Wastewater by Sulfate Reducing Bacteria

作　　者：倪尚源 刘岳林 王映林[1] NI Shangyuan;LIU Yuelin;WANG Yinglin(College of Civil Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China)

机构地区：[1]湖南工业大学土木工程学院,湖南株洲412007

出　　处：《湖南工业大学学报》2020年第5期90-96,共7页Journal of Hunan University of Technology

基　　金：湖南省教育厅科学研究基金资助项目(13C053)。

摘　　要：从污水厂污泥中培养驯化出以硫酸盐还原菌(SRB)为优势菌种的混合菌液,以Cd^2+去除率为考察指标,在适宜的厌氧生长环境下(pH值为7.5,温度为35℃)研究其对低浓度含镉废水的处理效果。结果表明,以SRB为优势菌种的混合菌液的去除效果随Cd^2+浓度的增大而降低。当Cd2+初始质量浓度小于40 mg/L时,菌液对Cd^2+的去除率接近100%,此时的处理效果稳定;当Cd^2+的初始质量浓度达到60 mg/L时,Cd^2+对菌株产生毒害作用从而使其失去处理能力。研究表明,SRB可以有效地去除废水中的低浓度镉离子。By using the removal rate of Cd^2+as the index,a research has been carried out of a mixture of sulfatereducing bacteria(SRB),cultured and domesticated from sewage sludge,on the removal effect of low concentration cadmium-containing waste water under anaerobic growth environment(pH=7.5,temperature 35℃).The results show that the removal efficiency of SRB as the dominant strain decreases with the increase of Cd2+concentration.With the initial mass concentration of Cd^2+less than 40 mg/L,the removal rate of Cd^2+approximates 100%,a stable treatment effect so far achieved.When the initial mass concentration of Cd^2+reaches 60 mg/L,Cd2+exerts a toxic effect on the strain,with SRB losing its processing power.The results show that SRB can effectively remove low concentration cadmium ions in wastewater.

关 键 词：硫酸盐还原菌 镉离子 筛选与纯化 抑制 去除率 

分 类 号：X172[环境科学与工程—环境科学] X53