【摘要】 针对焦化废水可生化性差、难以生化处理的特点,采用微电解工艺作为预处理措施,去除部分污染物并提高废水的可生化性,再利用SBR活性污泥法进行了深度处理实验. 结果表明,微电解法不仅能去除焦化废水中的COD、酚、氰、硫化物等有机污染物(COD去除率为70%, 酚、氰、硫化物去除率分别为76.8%, 65.9%, 70.3%),而且还能提高废水的可生化性(BOD5/CODcr由处理前的0.28提高到处理后的0.54,可生化性提高了48.2%). 通过正交试验确定了微电解法预处理焦化废水的适宜参数为:进水COD2200~2400 mg/L,进水pH值约3.0~3.2,微电解水力停留时间HRT55~65 min,Fe/C(体积比)1:1.5. 应用微电解预处理-SBR深度处理焦化废水,可使出水达标排放(国家I级排放标准GB13456-92).更多还原

【Abstract】 Tests has been carried out on treating coking wastewater using the micro-electrolysis-SBR activated sludge process. The results show that the micro-electrolysis technology not only removes COD, phenol, cyanide, sulfide in the wastewater, but also improves its biodegradability (BOD5/CODcr) from 0.28 to 0.54. With the micro-electrolysis technology, the removal rate of COD, phenol, cyanide, sulfide is up to 70%, 77%, 68%, 71% respectively. By orthogonal test, the best parameters of micro-electrolysis pre-treatment of coking wastewater are: influent COD2200~2400 mg/L, influent pH 3.0~3.2, HRT 55~65 min, volume ratio of Fe/C=1:1.5. Using the micro-electrolysis-SBR bio-treatment technology the effluent water can meet Grade I requirement of the National Discharge Standard (GB13456-1992) for discharging industrial wastewater.更多还原