摘要
采用铁炭微电解法对印染废水进行顸处理，对影响铁炭微电解效率及LCOD、色度去除率的各种因素进行了研究。结果表明：铁炭微电解法预处理印染废水的最佳初始pH值为3，最佳混凝pH值为7．5，最佳铁炭比为1：1．1，铁屑的最佳投加浓度为10．8g／L，适宜的反应时间为30min，COD去除率最高可达38．2％，色度的去除率大于95％；通过铁炭微电解预处理后的印染废水其可生化性明显提高，BOD／COD比由0．16提高到0．45，为后续的生物处理提供了有利的条件。
The iron-carbon micro-electrolytic method was used to pretreat the dyeing wastewater. The factors which influence the iron-carbon micro-electrolytic efficiency as well as the removal efficiency of COD and chromaticity, including the initial pH, the flocculation pH, the Fe/C ratio, the dosage of Fe and the reaction time were studied in the pretreating process of dyeing wastewater. The test results show that the optimal initial pH is 3, the flocculation pH is 7.5, the Fe/C ratio is1：1.1, the most economical dosage of Fe is 10.8g.L^-1 and the reaction time is 30 minutes respectively. The maximum removal efficiency of COD may reach to 38.2% and the removal efficiency of chromaticity can be more than 95% under above conditions. The bio-chemical reaction ability of the pretreated dyeing wastewater can be improved with the ratio of BOD/COD being raised from 0.16 to 0.45, so as to advantageous to the follow-up bio-chemical treatment. In addition, the dyeing wastewater treating costs could be reduced by using waste carbon powder as electrode material with this method.
出处
《环境科学与管理》
CAS
2011年第12期109-112,89,共5页
Environmental Science and Management
关键词
印染废水
微电解法
COD
色度
dyeing wastewater
iron-carbon micro-electrolytic method
COD
chromaticity
