芬顿+絮凝沉淀法处理不饱和聚酯树脂废水

Treatment of unsaturated polyester resin wastewater by Fenton+flocculation precipitation method

河北省秦皇岛市某生产不饱和聚酯树脂公司,日产高浓度有机废水200 t,经检测废水中COD高达82125 mg/L,BOD 5为16409 mg/L,且成分复杂,毒性高,腐蚀性强,基本不可生化。采用芬顿+絮凝沉淀法处理不饱和聚酯树脂废水,考察了n(H_(2)O_(2))∶n(Fe^(2+))、反应时间和反应温度对有机物去除效率的影响。实验结果表明,当n(H_(2)O_(2))∶n(Fe^(2+))=20∶1、反应时间为40 min、反应温度为40℃时,废水处理效果最佳,COD降至3820 mg/L,去除率可达95.35%、BOD 5降至1601 mg/L,去除率可达90.24%,B/C从0.20提高至0.42,生化性得到明显提高。

A company producing unsaturated polyester resin in Qinhuangdao City,Hebei Province has a daily output of 200 tons of high concentration organic wastewater.After testing,the COD in the wastewater is as high as 82125 mg/L and BOD5 is 16409 mg/L,and the composition is complex,highly toxic,corrosive and basically non biochemical.When n(H_(2)O_(2))∶n(Fe^(2+))=20∶1,reaction time is 40 min,reaction temperature is 40℃,the wastewater treatment effect is the best,COD is reduced to 3820 mg/L,the removal rate can reach 95.35%,BOD5 is reduced to 1601 mg/L,the removal rate can reach 90.24%,B/C is increased from 0.20 to 0.42.The biochemical properties were significantly improved.