内聚营养源SRB固定化交联剂的选择及对含锌废水的处理  

Determination of crosslinking agent in immobilized beads of SRB sludge with inner cohesive carbon source and treatment of wastewater containing zinc

作　　者：王娜[1] 闵小波[1] 王云燕[1] 周敏[1] 柴立元[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：《中南大学学报（自然科学版）》2008年第2期273-278,共6页Journal of Central South University:Science and Technology

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

摘　　要：以聚乙烯醇为包埋介质,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,考察不同交联剂对成球性能影响、营养源内聚效果、硫酸盐还原效果、锌离子去除率和出水COD(化学需氧量)等因素。研究结果表明:最佳交联剂为40%(NH4)2SO4和2%CaCl2;采用该交联体系制得固定化小球,每克小球内聚33.11mg乳酸钠,硫酸根还原率为53.5%,锌离子去除率可达到98%,出水COD低于100mg/L;固定化小球经过4次循环试验,出水锌离子浓度仍达到污水综合排放二级标准。The sulfate-reducing-bacteria （SRB） were immobilized in polyvinyl alcohol （PVA） to treat wastewater containing zinc. The effects of different crosslinking reagents on the conglobation, cohered efficiency of the carbon source, reduction ratio of sulfate, removal ratio of Zn（Ⅱ）, and COD（chemical oxygen demand） of drainage were considered. The results show that the optimum crosslinking agents is 40% （NH4）2SO4 and 2% CaCl2, the content of cohered lactate with immobilized beads cross linked by this agent is 33.11 mg, the reductive ratio of sulfate is 53.5%, removal ratio of Zn（Ⅱ） reaches 98% and COD of drainage is less than 100 mg/L. After several cycles, Zn（Ⅱ） concentration of treated water is still lower than that of the second discharge standard of waste water.

关 键 词：硫酸盐还原菌(SRB) 交联剂 含锌废水 

分 类 号：X703.1[环境科学与工程—环境工程]