Fe-C微电解法预处理高浓度印染废水的研究  

High Concentration Dyeing Waste Water Pretreatment by Fe-C Micro-Electrolysis

作　　者：叶国祥[1] 周烁灵 唐佳玙[1] 郑豪[1] 杨岳平[1,2] 徐新华[1] 

机构地区：[1]浙江大学环境工程研究所,浙江杭州310027 [2]浙江至美环境科技有限公司,浙江杭州310030

出　　处：《高校化学工程学报》2011年第3期489-494,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07101-006-09);浙江省重大科技专项(2009C03005-4)

摘　　要：采用强化Fe-C微电解工艺对酸性高浓度印染废水进行了试验研究。对于CODCr 15000~32000 mg·L-1,色度1200~1500倍的高浓度印染废水,絮凝预处理可以使CODCr降低30%~50%,色度下降20%左右。由于该印染废水的pH仅为2.0~3.0,所以絮凝预处理后的废水,加入少量的H2O2有利于Fe-C微电解反应的进行,该强化Fe-C反应添加的H2O2量约为0.01 mol·L-1,适宜的反应时间为120 min。Fe-C微电解反应结束后,废水的pH上升到6.0左右,调节pH至中性或弱碱性,可以基本去除废水中的Fe离子,总CODCr去除率达到60%~70%,色度去除率达到95%以上。该Fe-C反应消耗的H2O2远低于Fenton反应所需的0.4 mol·L-1,适用于工业废水的实际预处理。Fe-C micro-electrolysis was utilized for pretreatment of high concentration dyeing wastewater in this study.About 30%~50% of CODCr（15000~32000 mg·L-1） of the original wastewater and about 20% of chromaticity（1200~1500 times） were eliminated after coagulation pretreatment.Adding a small amount of H2O2 was beneficial to the pretreatment of coagulated wastewater by Fe-C micro-electrolysis.Using Fe-C miono-electrolysis,the total CODCr reduction is about 60%~70% after 120 minutes reaction with about 0.01 mol·L-1 H2O2 added.And the decoloring ratio is about 95% at the same time.The pH value raises to 6.0 at the end of Fe-C micro-electrolysis reaction,and it should be adjusted to 11.0 by NaOH for removing Fe ion.The dosages of H2O2 and NaOH added in Fe-C micro-electrolysis reaction are much less than those needed in Fenton reaction.So the Fe-C micro-electrolysis reaction is a proper technology for industrial wastewater pretreatment.

关 键 词：印染废水 絮凝 Fe-C微电解 FENTON反应 COD 色度 

分 类 号：X703.1[环境科学与工程—环境工程] X791