混合硫酸盐还原菌与Cu/Fe颗粒协同处理含铬废水的研究  

Treating Cr(Ⅵ)-Containing Wastewater by a Consortium of Sulfate Reducing Bacteria and Copper-Iron Bimetallic Particles

作　　者：贺气志[1,2] 陈辉[1,2] 王丹[1,2] 李华[1,2] 丁兴华[1,2] 邓乐[1,2] 

机构地区：[1]湖南师范大学生命科学学院,长沙410081 [2]微生物分子生物学省部共建国家重点实验室培育基地(湖南师范大学),长沙410081

出　　处：《环境科学》2011年第7期2000-2005,共6页Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07212-001-03)

摘　　要：利用化学沉淀法制备Cu/Fe双金属颗粒,并从工业污泥中驯化得耐Cr(Ⅵ)硫酸盐还原菌厌氧混合菌群(SRB),将两者协同处理含Cr(Ⅵ)废水.研究比较了SRB-Cu/Fe体系与传统SRB体系、Cu/Fe体系处理废水的效果,并探讨了不同QCu/Fe、pH值对SRB-Cu/Fe体系处理效果的影响.结果表明,SRB-Cu/Fe体系的处理效果明显优于SRB或Cu/Fe体系的效果.Cu/Fe双金属颗粒的参与不仅明显缩短了SRB的适应期,提高了硫酸盐、Cr(Ⅵ)的还原速率,而且显著增强了SRB对Cr(Ⅵ)耐受性,其耐铬能力提高了200%(从100 mg.L-1增加到300 mg.L-1).在Cr(Ⅵ)浓度为300 mg.L-1、Cu/Fe双金属颗粒比值(QCu/Fe)为7.5%、pH为5.0～8.0条件下,室温处理48 h后,出水的Cr(Ⅵ)浓度低于0.071 mg.L-1,总铬浓度低于0.512 mg.L-1,Cu浓度接近于0.本研究新构建的SRB-Cu/Fe体系处理效果显著,兼具生物和化学处理的优点,在含铬废水的处理中具有广阔的应用前景.Copper-iron bimetallic particles were prepared by chemical precipitation technique.Under the help of the particles Cr（Ⅵ）-containing wastewater was well treated by a consortium of sulfate reducing bacteria,which were enriched from industrial wastewater and acclimatized to tolerant to high concentrations of Cr（Ⅵ）.SRB-Cu/Fe system,traditional SRB system and Cu/Fe system were experimented in the batch bioreactor,respectively.It is demonstrated that SRB-Cu/Fe bimetallic system perform much better than traditional SRB system or copper-iron bimetallic.The acclimation period of SRB was significantly reduced and the inhibiting concentration of Cr（Ⅵ） of SRB was also greatly increased by approximately 200%（from 100 mg^·L^-1 to 300 mg^·L^-1）.Under the conditions of Cr（Ⅵ） 300 mg^·L^-1,QCu/Fe 7.5%,pH 5.0-8.0,the concentration of total chromium was less than 0.512 mg/L,Cr（Ⅵ） less than 0.071 mg,Cu next to zero after 48 h treatment.Having biological,chemical advantages and high efficiency,the novel SRB-Cu/Fe system should have the broad application prospects in industrial wastewater.

关 键 词：硫酸盐还原菌 Cu/Fe颗粒 Cr(Ⅵ) 还原 废水 厌氧 

分 类 号：X703.1[环境科学与工程—环境工程]