铁碳床联合过氧化氢氧化-混凝技术深度处理制浆废水

Advanced Treatment of Pulp Effluent by Fe-C Bed Combined with Hydrogen Peroxide-coagulation

采用铁碳床联合过氧化氢氧化-混凝技术对制浆造纸生化处理后的出水进行深度处理，考察了pH值、反应时间、H2O2投加量和进水水质等不同操作条件下对CODc，和色度去除的影响。结果表明，在pH值为5、反应时间为120min、H2O2投加量为100mg／L的条件下对污染物去除效果最佳，进水CODCr浓度对CODCr和色度去除影响不大。进水CODCr为520mg／L、色度为400倍情况下，出水CODCr低于100mg／L，色度低于50倍，出水各项指标均达到《制浆造纸工业水污染物排放标准》（GB3544-2008）。

The effluent from pulp mill after treatment by combined biochemical process can＇t meet the requirements of discharge standard because of high CODCr concentration and chroma. To solve the problem, Fe-C bed combined with hydrogen peroxide-coagulation process as advanced treatment under various conditions of pH, reaction time, dosage of H2O2 was investigated in this study. Results showed that the optimum operating conditions are as follows： pH value of initial influent 5, reaction time 120 min, H2O2 dosage 100 mg/L. The CODer concentration of initial effluent has little impact on CODc, and color removal. The CODCr concentration decreases from 520 mg/L to less than 100 mg/L, chroma decreases from 400 degree to less than 50 degree after treatment, which meets the national discharge standard of integrated wastewater discharge standard （ GB3544-2008 ）.