期刊论文

Effects of persulfate oxidation on dewatering performance and removing heavy metals in municipal sludge

Zeng, Qing-Ru(qrzeng@163.com)

中文

中国环境科学

1000-6923

2017

37

12

4605-4613

10.3969/j.issn.1000-6923.2017.12.025

国家重大研发计划（2016YFD0800304）；

本校为第一且通讯机构

利用具有强氧化性质的K_2S_2O_8试剂作为研究对象,考察了对污泥重金属Pb、Zn、Cu、Cd的去除影响、脱水表现以及处理前后污泥性质的变化.结果表明:在起始pH值为2.0,反应时间1h,温度25℃,投加1.34g/g SS的K_2S_2O_8,可改善污泥的脱水性能.其中,滤饼含水率可由82.6%降至74.8%;污泥比阻由6.70×10~8S~2/g下降至5.43×10~8S~2/g.K_2S_2O_8氧化处理污泥,可使污泥絮体快速分解,上清液COD从15.2mg/L增至187.0mg/L;TN从6.03mg/L增至22.7mg/L;TP则由8.15mg/L变为12.7mg/L;污泥TSS相应降低了9.4%.污泥重金属去除率随着投加量的增加而增加,当K_2S_2O_8投加量达到2.01g/g SS时,污泥重金属Pb、Zn、Cu、Cd去除率...

The objectives of the study were to investigate the effects of the strong oxidizing agent-potassium persulfate on heavy metal removal, dewatering performance and characteristic of sludge. The results showed that sludge dewatering performance was improved, the moisture content of sludge cake was decreased from 82.6% to 74.8%, specific cake resistance was reduced from 6.70×108S2/g to 5.43×108S2/g under the condition (2for initial pH, 1h for reaction time, 25℃for temperature, 1.34g/g SS for K2S2O8dosage). K2S2O8could effectively promote decomposition of the sludge floc. As a res...