沈阳某污泥堆放场地贮存污泥性质分析

摘要

The aim of this study is to investigate the changes of physical and chemical properties of sludge in a municipal solid waste landfill in Shenyang.The sludge was sampled in 4 #,6# and 10# sludge storage pit.The results showed that water content of sludge in 4 #,6# and 10# were 76.01％,75.06 ％ and 82.17 ％,;pH value 7.89,8.79 and 8.72,respectively;organic matter contents were 37.8％,36.4％and 42.0％;TN,TP content of 1.57％ ～2.23％ and 2.28％ ～3.96％.Heavy metals Cu content of 0.81‰,more than the highest content in "A standard of sludge disposal in urban sewage treatment plant landfill mixed with mud-farm argillaceous" (CJ/T 309-2009).With landfill prolonged,the organic content decreased and residual heavy metal percentage content increased,however,exchangeable percentage content reduced.%目的 探明随着填埋时间的延长贮存污泥物理化学性质变化规律.方法 通过对沈阳市某污泥堆放场地不同填埋时间的4#、6#、10#三个污泥储坑采样分析,检测污泥含水率、pH值、有机质质量分数、TN、TP和重金属形态及质量分数等指标,并与于沈阳市北部污水处理厂新鲜污泥性质对比.结果 试验结果表明4#、6#和10#贮存污泥的含水率为分别为76.01％、75.06％和82.17％;pH值分别为7.89、8.79和8.72;有机质质量分数分别为37.8％、36.4％和42.0％;TN、TP质量分数在1.57％ ～2.23％和2.28％～3.96％.重金属中Cu质量分数达0.81‰,超过《城镇污水处理厂污泥处置农用泥质》(CJ/T 309-2009)标准中A级污泥最高含量限值.结论 随着填埋时间延长,有机质含量降低;重金属残渣态百分含量增多,可交换态百分含量减少.