不同来源高浓度有机废水的集中处理

按照水质情况,将多种来源于不同工业生产过程中的高浓度有机废水划分为高悬浮固体乳化液废水、难生化高浓度有机废水、高悬浮固体不含油有机废水、含铬有机废水和杂质含量较少的乳化液废水5类,分别采用酸化破乳/Fen-ton氧化/混凝/絮凝、Fenton氧化/混凝/絮凝、混凝/絮凝、还原/混凝/絮凝、震动膜过滤技术作为生化预处理技术,并通过小试和中试验证了各技术的效果。实验结果表明,按照上述分类结果,采用不同预处理技术可以得到良好的效果,废水水质明显改善,满足继续生化处理的基本条件。各预处理生产装置处理效果稳定,同时生化系统已经稳定运行120天以上,COD去除率超过90%,出水经过低剂量的Fenton试剂处理后可达到《污水排入城镇下水道水质标准》(CJ343-2012)。

Central treatment of wastewater with high organic content from different industrial sources

High content organic wastewaters from different industrial sources were classified as waste emulsions with high suspended solid concentration, biorefractory wastewaters with high organic loading, high suspended solid organic wastewater without oil, organic wastewater containing chromium, emulsions with low suspended solid content which were treated by using acidification demulsification/Fenton oxidation/coagulation/flocculation, Fenton oxidation/coagulation/flocculation, coagulation/flocculation, reduction/coagulation/flocculation, vibrating membrane respectively. Performance of pretreatment was investigated in both laboratory experiments and full scale application. Results indicated that water quality of industrial wastewaters could be improved significantly by using pretreatment technologies, and effluent was fit for further biological treatment. The biological process has operated normally for 120 days, more than 90% of COD could be removed. The final effluent could meet the Water Quality Standards for Discharge to Municipal Sewers(CJ343-2012) after treatment by Fenton reagent at low dosage.