Fenton试剂氧化破解剩余污染的研究

Study on Excess Sludge Disintegration by Fenton Oxidation

采用Fenton试剂氧化破解污染,研究污泥中SCOD、VSS、滤饼含水率、SV30等污泥性能指标的变化规律。结果表明:当p H为2.0、H2O2和Fe2+投加量分别为8 g/L和0.8 g/L、反应时间1.5 h、反应温度80℃时,Fenton试剂对污泥的氧化破解效果最佳。在该条件下,SCOD由132 mg/L上升至1398 mg/L、滤饼含水率由87.1%下降至78.2%、SV30由99%下降至22%、VSS由10.11 mg/L下降至3.62 mg/L。Fenton试剂在破解氧化方面具有高效、稳定、清洁等优点,对污染减量处理提供技术支持,减少污水处理对环境的二次污染。

Fenton reagent was used to oxidize excess sludge, performance of which was characterized by the parameters of soluble chemical oxygen demand（SCOD）, volatile suspended solid（VSS）, moisture content of sludge cake and SV30. Based on the experimental results, the operation conditions were optimized with p H of 2.0, H2O2 dosage of 8.0 g/L, Fe2＋ dosage of 0.8 g/L, reaction time of 1.5 h and reaction temperature of 80 ℃. The value of SCOD increased from 132 mg/L to 1398 mg/L. The value of moisture content of sludge cake and VSS decreased from 87.1 % to 78.2 % and 10.11 mg/L to 3.62 mg/L, and the value of SV30 decreased from 99 % to 22 %, respectively. Fenton reagent has the advantages of high efficiency、stable、clean in deciphering the oxidation, and to provide technical support for pollution reduction processing, reducing sewage secondary pollution to the environment.