Comparison of Bioleaching of Heavy Metals from Sewage Sludge of Different Solid Concentrations Using Two Inocula  

作　　者：Guiqun PENG Ziqiang AO Shunbao LU 

机构地区：[1]Institute of Energy Research,Jiangxi Academy of Sciences,Nanchang 310096,China [2]Jiangxi Normal University,Nanchang 310096,China

出　　处：《Agricultural Science & Technology》2017年第12期2415-2418,共4页农业科学与技术（英文版）

基　　金：Supported by the National Natural Science Foundation of China(NO.21567010,NO.31560168 and NO.31760136);Natural Science Foundation of Jiangxi Province(20161BAB204175)

摘　　要：Two 10%(v/v) different inocula, iron-oxidizing bacteria and sulfur-oxidizing bacteria, were used to investigate the bioleaching of heavy metals from sewage sludge with 10-40 g/L sludge concentration in the batch experiment. The results demonstrated that most of bioleaching rates of Zn and Cu achieved above 80% and 60%, respectively, after 12 d in the sludge with different concentrations and inocula. The lower the solid concentration, the higher the removal rate of heavy metals and the quicker the removal speed in sludge. The system with iron-oxidizing bacteria had faster startup speed and was influenced by solid concentration lightly, while in the system with sulfur-oxidizing bacteria, the removal efficiency was affected by concentration seriously.Two 10% （v/v） different inocula, iron-oxidizing bacteria and sulfur-oxidizing bacteria, were used to investigate the bi- oleaching of heavy metals from sewage sludge with 10-40 g/L sludge concentration in the batch experiment. The results demonstrated that most of bioleaching rates of Zn and Cu achieved above 80% and 60%, respectively, after 12 d in the sludge with different concentrations and inocula. The lower the solid concentration, the higher the removal rate of heavy metals and the quicker the removal speed in sludge. The system with iron-oxidizing bacteria had faster startup speed and was influenced by solid concentration lightly, while in the system with sulfur-oxidizing bacteria, the removal efficiency was affected by concentration seriously.

关 键 词：Sewage sludge Heavy metals BIOLEACHING Solid concentration THIOBACILLUS 

分 类 号：X703[环境科学与工程—环境工程]