【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。更多还原

【Abstract】 The alkaline wastewater containing chromium(Cr(VI)) was treated with C-1 strain(identified) as achromobacter 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.更多还原