摘要
采用铁刨花强化Fenton对制药废水二级生化出水处理效果进行深入研究。考察了铁刨花和药剂投加量对强化Fenton的影响,对比了常规Fenton和强化Fenton两者COD降解情况和出水pH值变化情况。结果表明:强化Fenton中投加的铁刨花可以提供充足的亚铁离子,无需投加Fe SO_4·7H_2O即可高效降解废水中有机物;当初始pH=3.8,铁刨花投加量100 g·L^(-1),30%H_2O_2投加量0.6 m L·L^(-1),曝气反应120 min,强化Fenton出水COD去除率高达66.5%,比常规Fenton提高20%以上;常规Fenton出水pH值在3.0左右,而强化Fenton出水pH在6.0以上,可有效节约后续pH回调时药剂使用量,降低运行成本。
The treatment efficiency of the secondary biochemical effluent in pharmaceutical wastewater was studied using the iron scraps enhanced Fenton process. Effects of iron scraps dosage and chemical reagent on the enhanced Fenton were investigated. The COD degradation and effluent pH value of conventional vs. enhanced Fenton were discussed. The results showed that Fe2＋was supplied in ample amounts by iron scraps in enhanced Fenton. Also,organic substances of wastewater were degraded efficiently without the addition of Fe SO4·7H2O.Second,an initial pH of 3. 8,100 g·L-1dosage of iron scraps,0. 6 m L·L-1dosage of 30% H2O2,and reaction of 2 h with aeration achieved a COD removal rate of 66. 5%,which was 20% higher than that of conventional Fenton. Furthermore,the effluent pH of conventional Fenton was about to 3. 0,while the effluent pH of enhanced Fenton was above 6. 0. Therefore,the iron scraps enhanced Fenton could reduce the dosage of chemical reagent and operation cost.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第10期5671-5676,共6页
Chinese Journal of Environmental Engineering
作者简介
陈建华（1964-），男，本科，工程师，研究方向：废水处理与工程应用。E-mall：chenjanhua@lunan．cn
通讯联系人，E-mail：shiyonghui-10@163．com
