游离和固定化SRB污泥处理含锌废水比较研究  

Comparative Study on Treating Wastewater Containing Zinc by Free and Immobilized Sludge of SRB

作　　者：王娜[1] 闵小波[1] 王云燕[1] 柴立元[1] 周敏[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《环境科学与技术》2008年第11期69-72,共4页Environmental Science & Technology

基　　金：国家自然科学基金(50508044);湖南省科技计划攻关重大专项(05SK1003-1)

摘　　要：采用聚乙烯醇(PVA)-硫酸铵包埋法对硫酸盐还原菌(SRB)进行固定化处理。以含锌废水为处理对象,利用内聚营养源固定化小球与游离污泥做对比实验,考察硫酸根去除率、锌离子去除率、出水COD值等因素,并借助EDX分析小球内部锌离子含量。实验结果表明,采用内聚营养源固定化小球,硫酸根去除率为55.7%,锌离子去除率达98%,出水COD<100mg/L,进行多次循环实验,出水锌离子浓度仍达到污水综合排放二级标准;采用游离污泥,硫酸根去除率为46.1%,锌离子去除率为98.2%,出水COD1800mg/L以上,用于二次处理废水,锌离子去除率仅为60.4%。固定化小球循环处理废水四次后,每克固定化小球内部锌离子含量为0.04364mg。Sulfate-reducing bacteria （SRB） were immobilized with PVA-（NH4）2O4 method. Wastewater containing zinc was treated with immobilized beads with inner cohesive carbon source in contrast with free sludge to investigate removal efficiency of SO4^2- and Zn （Ⅱ） as well as effluent COD, and content of Zn （Ⅱ） within bead was analyzed by EDX. Results showed that removal efficiency of SO4^2- and Zn （Ⅱ） with immobilized beads with inner cohesive carbon source was 55.7% and 98% respectively and effluent COD was less than 100mg/L. In repeated cyclic tests, Zn （Ⅱ） concentration of treated water still satisfy Class Ⅱ of discharge standard of wastewater. Removal efficiency of SO4^2- and Zn （Ⅱ） with free sludge was 46.1% and 98.2% respectively, and COD was more than 1800mg/L. Removal efficiency of Zn （Ⅱ） was only 60.4% in the second time test. Inner content of Zn （Ⅱ） was 0.04364mg/g beads after fourth cycle of wastewater treatment.

关 键 词：内聚营养源 固定化技术 硫酸盐还原菌(SRB) 含锌废水 

分 类 号：X703.1[环境科学与工程—环境工程]