生物淋滤法去除城市剩余污泥中重金属的实验研究  

Removal of Heavy Metals from Sewage Sludge by Bioleaching

作　　者：谢琴[1,2] 伍健东[1,2] 胡芳[1,2] 

机构地区：[1]华南理工大学环境科学与工程学院,广州510006 [2]华南理工大学工业聚集区污染控制与生态修复教育部重点实验室,广州510006

出　　处：《工业安全与环保》2013年第1期77-79,共3页Industrial Safety and Environmental Protection

基　　金：华南理工大学学生研究计划SRP

摘　　要：以广州市某污水处理厂剩余污泥为培养介质,分别利用单质硫(S)以及硫和硫酸亚铁配合物(S和FeSO4按一定比例混合)为底物来培养以氧化硫硫杆菌和氧化亚铁硫杆菌为优势的驯化污泥混合液,用其淋滤去除污泥中的重金属,在不同的污泥混合液接种量(5%、10%、20%)条件下,研究其对污泥中重金属的去除效果。随着接种量的增加,重金属Zn、Cd、Cu、Pb的去除率也随之增加,在接种量为5%时,Zn、Cd、Cu、Pb的去除率分别为46%、54.6%、13.9%和30.5%,而在接种量为20%时,它们的去除率分别达到了72%、79.6%、29%和65.4%。驯化培养出来的污泥混合液对重金属Zn、Cd和Cu的去除效果较好,而对Pb的去除率则较低,最高只有29%。This study aims to evaluate the bioleaching process to remove heavy metals from sewage sludge.Sludge acclimatization and bioleaching are both performed on sewage sludge collected from one wastewater treatment plant of Guangzhou. Different sludge inoculation(5%,10%,20%)is added in the treated sludge to study the removal efficiency of heavy metals(Zn,Cd,Pb,Cu).The results show that with the inoculation of 5% of the cultivated sludge,the removal rate of Zn,Cd,Cu and Pb is 46%,54.6%,13.9% and 30.5% respectively,but that of Zn,Cd, Cu and Pb can reach 72%,79.6%,29% and 65.4% respectively.The cultivated sludge mixed liquid had better removal efficiency on heavy metals Zn,Cd and Cu,but lower removal efficiency on Pb,highest only to 29%.

关 键 词：生物淋滤 重金属 城市剩余污泥 

分 类 号：X703[环境科学与工程—环境工程]