异化金属还原菌利用发酵制氢废液还原软锰矿  

Pyrolusite reduction with dissimilatory metal reducing bacteria in the effluent of bio-hydrogen production

作　　者：田京雷[1] 冯雅丽[1] 李浩然[2] 齐凤杰[1] 唐新华[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国科学院过程工程研究所生化工程国家重点实验室,北京100190

出　　处：《北京科技大学学报》2011年第8期911-915,共5页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(20876160);中央高校专项资金资助项目(FRT-TP-09-002B)

摘　　要：利用纯二氧化锰在微酸性条件下对异化金属还原菌进行驯化,二氧化锰的颜色由黑色逐渐变浅至白色,X射线衍射分析表明微生物可有效还原二氧化锰成为碳酸锰;以发酵制氢废液为还原底物,利用异化金属还原菌在不同酸性条件下直接浸出低品位软锰矿,通过单因素实验研究厌氧条件、pH值对锰浸出率的影响,并对制氢废液化学需氧量(COD)的去除率及浸出机理进行研究.结果表明,异化金属还原菌利用发酵制氢废液还原软锰矿,厌氧浸出优于好氧浸出,最佳pH值为3.0～3.5,浸出时间为3 d时,最大浸出率达到98%;用软锰矿对发酵制氢废液在微酸性条件下进行降解,COD质量浓度为2612 mg.L-1时最大去除率达到84%,COD去除率随软锰矿量的增加而增大.Dissimilatory metal reducing bacteria were domesticated with MnO2 in acidic conditions,and then the MnO2 color changed from black to white,even colorless.X-ray diffraction analysis indicated that dissimilatory reductive microbes could reduce MnO2 effectively after domestication.Manganese leaching from pyrolusite was investigated by using dissimilatory metal reducing bacteriaunder acid conditions,with the effluent of bio-hydrogen production as a reducing agent.Single-factor experiments were employed to examine the effects of anaerobic conditions and pH values on the leaching rate of Mn.The removal rate of chemical oxygen demand（COD） and the mechanism were also studied.It was shown that dissimilatory metal reducing bacteria reduced pyrolusite using the effluent of fermentative hydrogen production.The leaching rate of manganese under anaerobic conditions was higher than that under aerobic conditions,and it could reach 98% under the conditions of pH 3.0-3.5 and the leaching time of 3d.For degrading the effluent of bio-hydrogen production under subacid conditions,the COD removal rate could reach 84% when COD in the effluent of bio-hydrogen production was 2612mg·L-1,and it would be higher with more pyrolusite.

关 键 词：软锰矿 金属还原菌 异化还原 生物制氢 废液 化学需氧量(COD) 

分 类 号：TF803.21[冶金工程—有色金属冶金]