混凝氧化法处理喹禾灵含酚废水的研究

Study on Kuihelin Phenol Wastewater Treatment with Coagulation and Oxidation

喹禾灵含酚废水是一种高浓度含酚有机废水，色度为１００００、ＣＯＤｃｒ高达２０００～３０００ｍｇ／Ｌ、对苯二酚高达２０００ｍｇ／Ｌ．采用三氯化铁作混凝剂，次氯酸钠作氧化剂，就混凝剂、氧化剂最佳投药量及ｐＨ值对处理效果的影响进行了混凝氧化的试验研究．试验结果表明：混凝剂最佳投药量为１０ｇ／Ｌ，最佳ｐＨ＝９～１０；氧化剂最佳投药量为５０ｍｌ／Ｌ，最佳ｐＨ＝２～３，最终对色度、ＣＯＤｃｒ、对苯二酚的去除率分别为９９％、９８％、９９％．

Kuihelin phenol wastewater is a high concentration organic wastewater,which colority is 10 000,COD cr is in the range from 2 000 to 3 000 mg/L ,1,4-dihydroxybenzene is 2 000 mg/L.Using ferric chloride as coagulating agent and sodium hypochlorite as oxidant,experimental research on optimun coagulating agent and oxidant dosage and effect of pH are conducted. Experimental results indicate that optimun coagulating agent dosage is 10 mg/L and pH is in the range from 9 to 10. Optimun oxidant dosage is 50 mg/L and pH is in the range from 2 to 3. Efficiency of colority, COD cr and 1,4-dihydroxybenzene are 99%,98% and 99% respectively.