南京大学学报（自然科学版）2025，Vol.61Issue(5)：728-737,10.DOI:10.13232/j.cnki.jnju.2025.05.002
基于污泥基生物质炭的电Fenton体系改善污泥脱水性能研究
Enhancement of excess sludge dewatering by electro-Fenton process based on sludge biochar
摘要
Abstract
Sludge dewatering is a significant process and challenge in sewage treatment.Different Fe-modified sludge biochar derived at four different pyrolysis temperatures was used as the particle electrode in the three-dimensional neutral electro-Fenton.The performance and mechanisms of the three-dimensional neutral electro-Fenton for the sludge dewatering were analyzed.The results showed that BC@Fe-800 had the strongest improvement in sludge dewatering performance,with a specific resistance to filtration(SRF)、moisture content of filter cake and SV30 min reduction rate of 81.87%,35.61%and 31.12%.The mechanisms were the conversion of bound EPS and intracellular bound water into dissolved EPS and free water after the oxidation of free radicals.After treatment of the three-dimensional neutral electro-Fenton,the hydrophobic tryptophan protein content in the sludge increased,and the bacterial community structure underwent a significant change at both the phylum and genus levels.Additionally,the abundance of acid producing bacteria decreased,while the abundance of organic pollutant degrading bacteria,denitrifying bacteria,and phosphorus removing bacteria increased.Therefore,it might contribute to the resource utilization of sludge.The optimization results of the three-dimensional neutral Fenton system indicated that the optimal treatment conditions were 5%particle electrode addition and 20 mA·cm-2 current density.These results can provide the theoretical foundation for the resource utilization of sludge.关键词
污泥脱水/污泥生物质炭/三维中性电Fenton(3D-EF)/胞外聚合物Key words
sludge dewaterability/sludge biochar/three-dimensional neutral electro-Fenton(3D-EF)/extracellular polymeric substances(EPS)分类
资源环境引用本文复制引用
张官杰,刘舒蕾,周英萍,肖琳..基于污泥基生物质炭的电Fenton体系改善污泥脱水性能研究[J].南京大学学报（自然科学版）,2025,61(5):728-737,10.基金项目
国家自然科学基金(42277199) （42277199）
