摘要
采用混凝法分别以聚合氯化铁(PFC)、聚合氯化铝(PAC)和聚合硫酸铁(PFS)为混凝剂处理天津某石油化工厂二级氧化处理工艺出水,PFC 对废水 COD 的去除效果最好,在 PFC 加入量为120 mg/L 时,废水的 COD 去除率最高,为22.35%。经正交实验确定了 Fenton 试剂氧化法处理废水的最佳实验条件为:Fe^(2+)加入量290 mg/L、H_2O_2加入量100 mg/L、pH=6、反应时间30 min,此时 COD 去除率为20.45%。活性炭吸附法对废水的处理效果随活性炭加入量增加而改善,活性炭的最佳加入量为2 000 mg/L,此时废水的 COD 去除率最高,为87.78%。
Coagulation, Fenton reagent-H202 oxidation and activated carbon adsorption were studied as pretreatment processes for petrochemical wastewater treated by two-grade biooxidation process in a petroleum chemical plant in Tianjin. Ferric polychloride （ PFC）, aluminum polychloride （ PAC）, and ferric polysulfate （PFS） were used as coagulation agents. PFC has the best effect with 22.35% of COD removal rate when its dosage is 120 mg/L. The optimum process conditions of Fenton reagent oxidation determined by orthogonal experiments are as follows： Fe^2＋ dosage 290 mg/L, H2O2 dosage 100 mg/L, pH 6, reaction time 30 min. Under these conditions, the removal rate of COD is 20.45%. Increasing the dosage of activated carbon can improve the removal of COD. The removal rate of COD is 87.78% when the optimum dosage of activated carbon is 2 000 mg/L.
出处
《化工环保》
CAS
CSCD
北大核心
2008年第5期427-430,共4页
Environmental Protection of Chemical Industry
基金
国家863计划资金资助项目(2008AA06Z303)
关键词
混凝
FENTON试剂氧化
活性炭吸附
难降解石化废水
预处理
coagulation
Fenton reagent oxidation
activated carbon adsorption
refractory petrochemical wastewater
pretreatment
