高压脉冲电凝-Fenton-生化法处理制药废水

摘要

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60min.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 electrocoagulation and Fenton oxidation was used in pharmaceutical wastewater pretreatment, then the effluent flowed into biological process. For pulse electrocoagulation and Fenton oxidation proceas,the optimal condition was:the pH value was about 4.0,the pulse electrocoagulation reaction time was 45 min,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 365.5％～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).