高级氧化+SBR工艺处理聚乙二醇废水试验研究

研究了高级氧化+SBR组合工艺处理高浓度聚乙二醇(PEG)废水的效果及其影响因素。结果表明,采用芬顿试剂作为高级氧化剂,当FeSO4.7H2O投加量为800 mg/L,H2O2投加量为30 mL/L,反应时间为3.5 h时,CODCr去除率可达到50.5%;生化处理阶段所需采用两级SBR工艺,污泥浓度均为4 000 mg/L,一、二级厌氧及好氧反应时间分别为12和10 h;芬顿试剂氧化和厌氧处理对提高PEG废水的可生化性有明显效果;该组合工艺的出水水质可以达到《污水综合排放标准》(GB 8978—1996)中的二级排放标准。

Treatment of polyethylene glycol wastewater by advanced oxidation and SBR process

Treatment efficiency and influencing factors on wastewater with high concentration of polyethylene glycol(PEG) by advanced oxidation and SBR combined process were discussed.The results showed that the removal rate of CODCr could reach 50.5% when Fenton reagent was as advanced oxidant,the dosage of FeSO4·7H2O was 800 mg/L,H2O2 was 30 mL/L and the reaction time was 3.5 h.SBR process needed two stages for biochemical treatment,when the MLSS was 4 000 mg/L,the anaerobic and aerobic reaction time of two stages were 12 h and 10 h respectively.Fenton reagent oxidation and anaerobic biological reaction could significantly improve the biodegradability on PEG wastewater.The effluent quality of the combined process could meet the second class criteria specified in the Integrated Wastewater Discharge Standard(GB 8978-1996).