生物法处理冷轧高浓度含铬废水的中试研究  

Pilot-Scale Study on Microbial Treatment of Wastewater Containing High Concentration Chromium from Cold Rolling Mills

作　　者：俞勇梅[1] 周渝生[1] 

机构地区：[1]研究院环境与资源所,上海201900

出　　处：《宝钢技术》2006年第1期13-16,24,共5页Baosteel Technology

摘　　要：概述了微生物法应用于冷轧高浓度含铬废水处理的中试装置和工艺流程。选用彩涂和硅钢高浓度含铬废水作为废水来源,试验了微生物对不同含铬废水中Cr6+、T-Cr以及COD的去除效果。中试结果表明,生物法除铬工艺可适用于上述两种含铬废水的处理,二者出水中Cr6+的平均浓度分别为0.02 mg/L和0.04 mg/L,T-Cr平均浓度分别为0.71 mg/L和0.74 mg/L,满足废水排放标准(Cr6+<0.5 mg/L,T-Cr<1.5 mg/L)。同时,对于含较高浓度COD(>3 g/L)的含铬废水,该工艺可去除60%以上的COD;对于含较低浓度COD(<3 g/L)的含铬废水,COD去除率低于25%,投加絮凝剂是提高该废水COD去除率的有效途径之一。A microbial treatment of wastewater containing high concentration chromium from cold rolling mills has been studied on pilot-scale, The pilot-scale equipment and technological process are described in this paper, Two kinds of wastewater with high concentration chromium are chosen as wastewater source. One of them is from the color coating line, and the other from the silicon steel line. The removal effect of Cr^6＋ , T-Cr and COD in wastewater has been studied. The results show that this microbial treatment technology can be used to deal with the above two kinds of chromium-containing wastewater. The average concentration of Cr^6＋ of the effluent is 0.02mg/l, and 0.04 mg/L respectively, and the average concentration of T-Cr of the effluent is 0.71 mg/L and 0.74 mg/L. Both of them are lower than the Effluent Standard of Wastewater （ Cr^6 ＋ 〈 0.5 mg/L,T-Cr 〈 1.5 mg/L）. Furthermore, up to 60% of COD can be removed from chromate wastewater containing high concentration COD （ 〉3 g/L）. The removal rate of COD is lower than 25% for chromate wastewater containing low concentration COD（ 〈3 g/L）. Adding flocculating agent is one of the effective ways of improving COD removal rate of chromium-containing wastewater.

关 键 词：含铬废水 冷轧 六价铬 生物法 

分 类 号：X756[环境科学与工程—环境工程]