摘要
采用铁炭微电解—生化法处理含铬电镀废水(简称废水),铁炭微电解法处理废水时,考察了进水pH、Cr6+浓度、废水停留时间对废水预处理效果的影响;生化法处理废水时,考察了搅拌转速、废水停留时间对废水处理效果的影响。在进水pH约为3、废水在铁炭微电解反应柱内的停留时间为30min、生物反应器内搅拌器的搅拌转速为40r/min、废水在生物反应器内的停留时间为3h的最佳工艺条件下,废水经铁炭微电解—生化法连续处理后,出水中Cr6+、Cu2+和Ni2+的质量浓度分别为0.05,0.08,0.06mg/L,其去除率分别为99.0%,99.7%,99.3%,出水水质达到GB 8978—1996《污水综合排放标准》的要求,且不存在二次污染问题。
Electroplating wastewater containing Cr^6＋ was treated by Fe-C microelectrolysis - biological process. In the pretreatment of the wastewater by Fe-C microelectrolysis, the effects of influent pH, Cr^6＋ concentration and HRT were studied. In the treatment by biological process, the effects of rotating speed and HRT were studied. Under the optimum conditions of influent pH about 3, Fe-C microelectrolysis reactor HRT 30 min, bioreactor rotating speed 40 r/min and bioreactor HRT 3 h, the mass concentrations of Cr^6＋ , Cu^2＋and Ni^2＋ in the final effluent are 0.05, 0.08 and 0.06 mg/ L with removal rates of 99.0%, 99.7%, 99.3% respectively. The effluent quality can meet the wastewater discharge standards （GB 8978--1996）. Meanwhile, there is no secondary pollution.
出处
《化工环保》
CAS
CSCD
北大核心
2007年第4期338-341,共4页
Environmental Protection of Chemical Industry
基金
国家自然科学基金资助项目(50274034)
淄博市科技计划资助项目(106012)
关键词
铁炭微电解
生化法
电镀
废水处理
Fe-C microelectrolysis
biological method
electroplating
wastewater treatment
