喹禾灵含酚废水混凝效果的试验研究

EXPERIMENTAL RESEARCHES ON COAGULATION OF KUIHELIN PHENOL WASTEWATER

喹禾灵生产过程中产生的废水是一种深棕色（色度为１００００）的高浓度有机含酚废水（ＣＯＤＣｒ＝２６７２ｍｇ／Ｌ，对苯二酚＝２３３０ｍｇ／Ｌ）。选用三氯化铁作混凝剂，就混凝剂最佳用量及ｐＨ值对混凝效果的影响进行了试验研究。试验结果表明，三氯化铁的最佳投加量为１０ｇ／Ｌ，最佳ｐＨ值为９～１０，此时ＣＯＤＣｒ、对苯二酚及色度的去除率分别为８１７％、８６５％、９４％。

A high concentration organic phenol-containing wastewater which is deep brown is produced in the production process of Kuihelin, in which CODCr is 2 672 mg/L and 1,4-dihydroxybenzene is 2 330 mg/L and colority is 10 000. Using ferric chloride as coagulation agent, optimum coagulant dosage and the effect of pH on coagulation are studied in this paper. Experimental results indicate that optimum ferric chloride dosage is 10 g/L and optimum pH is in the range from 9 to 10. while the conditional efficiency of CODCr removal rate is 81.7%,efficiency of 1,4-dihydroxybenzene removal is 86.5% and efficiency of colority removal is 94%.