Fenton氧化对印染污泥脱水性能的影响

Influence of Fenton oxidation on the dewaterability of textile dyeing sludge

采用Fenton氧化法对印染污泥进行预处理,研究印染污泥中TSS、VSS、CST、SRF等脱水性能指标的变化规律.结果表明,当pH值为2.0,H2O2和Fe2+投加量分别为428 mg.g-1(干泥)和42.8 mg.g-1(干泥),反应时间1.5 h、反应温度80℃时,Fenton氧化后印染污泥的脱水效果最佳.在该条件下,TSS由18.66 g.L-1下降至4.82 g.L-1,去除率为74.17%;CST和SRF分别由98.6 s和6.03×1011s.2g-1下降至18.9 s和8.42×1010s.2g-1;污泥的平均粒径和中值粒径分别由53.8μm和42.9μm下降至19.8μm和16.2μm.

Fenton reagents were used to oxidize textile dyeing sludge.The dewaterability of the sludge was characterized by total suspended solid（TSS）,volatile suspended solid（VSS）,capillary suction time（CST）and specific resistance to filtration（SRF）.Based on the experimental results,the operation conditions were optimized as pH 2.0,H2O2 dosage of 428 mg · g-1,Fe2＋ dosage of 42.8 mg · g-1,reaction time of 1.5 h and reaction temperature of 80 ℃.The value of TSS decreased from 18.66 g · L-1 to 4.82 g · L-1,and the removal efficiency of TSS was 74.17%.The value of CST and SRF decreased from 98.6 s and 6.03×1011 s2 · g-1 to 18.9 s and 8.42×1010 s2 · g-1,respectively.The average particulate diameter and the median particulate diameter of the sludge changed from 53.8 μm and 42.9 μm to 19.8 μm and 16.2 μm,respectively.