微生物治理碱性含铬废水的试验研究  

Experimental study on microbial treatment of alkaline wastewater containing chromium(Cr(VI))

作　　者：柴立元[1] 龙腾发[1] 唐宁[1] 庄明龙[1] 闵小波[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）》2005年第5期816-820,共5页Journal of Central South University:Science and Technology

基　　金：教育部优秀青年教师基金资助项目(教人司2001-39号)

摘　　要：用从铬渣堆埋场附近的污泥中分离到的无色杆菌属C-1菌株,对碱性含铬废水进行生物处理,研究了该菌的生长条件,并探讨了温度、pH值、Cr(VI)初始浓度及作用时间等因素对Cr(VI)还原的影响。研究结果表明:C-1菌株适应碱性环境,对Cr(VI)具有较强的还原能力;在有氧、pH=10.30和温度为32℃的条件下,含Cr(VI)1 570.0 mg/L的废水经微生物处理16 h后Cr(VI)质量浓度降为0.6 mg/L;处理后的沉淀物中铬以非晶态存在,其中总铬含量为21.44%,Cr(VI)为痕量。The alkaline wastewater containing chromium（Cr（VI）） was treated with C-1 strain identified as achromohacter isolated from sludge nearby the chromium slag pole site. The optimum conditions of growth of the strain and factors affecting reduction efficiency of Cr（VI）, such as the temperature, the pH value of solution, the concentration of Cr（VI） and the treatment time, were studied. The results show that the strain is suitable for alkaline solution and reduction capacity for Cr（VI） is strong. After 16 h treatment by microbial, the concentration of Cr（VI） in wastewater is reduced from 1570 to 0.6 mg/L under the aerobic conditions and pH=10.30 and at 32℃. The treated sediment contains 21.44% chromium in the form of non-crystal in which the Cr（VI） is hardly detected.

关 键 词：碱性含铬废水 六价铬还原菌 铬渣渗滤液 生物还原 

分 类 号：X172[环境科学与工程—环境科学]