高压脉冲电凝-Fenton-生化法处理制药废水

Study on Pharmaceutical Wastewater by Pulse Electrocoagulation-Fenton Oxidation-Biological Process

通过高压脉冲电凝-Fenton对制药废水进行预处理,出水进入UASB-AO生化处理系统。研究表明:高压脉冲电凝-Fenton氧化法的最佳工况条件为进水pH值为4.0左右,高压脉冲电凝反应时间为45 min,H2O2投加量为4mL/L,Fenton氧化时间为60 min。高压脉冲电凝-Fenton对CODCr去除率为36.5%～39.2%,ρ(BOD5)/ρ(CODCr)从0.13提高到0.32～0.34,废水的可生化性大大提高,UASB厌氧反应器去除率为81.4%～82.1%,AO系统去除率为88.0%～88.5%,而整个生化处理系统对CODCr去除率为95.4%～97.9%,最终出水各项指标可达到GB 8978—1996《污水综合排放标准》中一级标准。

Pulse eleetrocoagulation and Fenton oxidation was used in pharmaceutical wastewater pretreatment, then the effluent flowed into biological process. For pulse electroeoagulation and Fenton oxidation process,the optimal condition was： the pH value was about 4.0,the pulse electroeoagulation reaction time was 45 rain,the H2O2 dosage was 4.0 mL/L,the Fenton oxidation reaction time was 60 rain.Under the above conditions,the total removal rate of COD reached 36.5% - 39.2%. The removal rate of COD in UASB and AO was 81.4% - 82.1% and 88.0% - 88.5% respectively. So the total removal rate of COD reached 95.4% - 97.9%. The result showed that the effluent quality met class I specified in the Integrated Wastewater Discharge Standard （GB 8978-1996）.