环境工程学报2025，Vol.19Issue(4)：805-814,10.DOI:10.12030/j.cjee.202404131
Fenton氧化调理改善剩余污泥脱水性能及作用机制
Topic 01-Fenton oxidation conditioning improves the dewatering performance of residual sludge and its mechanism of action
摘要
Abstract
Chemical conditioning is an effective means to improve sludge concentration and dewatering performance,and achieve deep sludge dewatering.The new iron-based advanced oxidation conditioning method has attracted much attention due to its advantages in redox potential,flocculation effect,and sludge dewatering performance.Taking excess sludge as the treatment object,from the perspectives of conditioning effect,filtrate quality,and chemical cost,three sludge conditioning processes including the combination of K2FeO4 and FeCl3,Fenton oxidation,and Fe2+activated peroxodisulfate were systematically compared,and the optimal conditioning method and conditioning conditions were clarified.By studying the changes in sludge properties before and after conditioning,the mechanism of conditioning action was elucidated.The results showed that after Fenton oxidation conditioning,the moisture content of dehydrated sludge could be reduced to about 45％,the TP concentration in the filtrate was less than 2.5 mg·L-1,and the chemical cost was only 43 yuan·t of sludge-1.The optimal operating conditions for this conditioning method were:The dosages of Fe2+and H2O2 were both 0.8 mmol·gTSS-1,with a pH of 6.5 for the original mud and room temperature conditioning.Fenton conditioning mainly utilized the generated·OH oxidation to degrade sludge flocs and extracellular polymers,reducing the water holding capacity of sludge flocs.At the same time,the generated Fe2+/Fe3+was used to weaken the polarity between sludge flocs,promoting the contact between flocs to squeeze out the water enclosed by the flocs.This study provides a theoretical basis for the application of Fenton oxidation in improving the dewatering performance of residual sludge.关键词
Fenton调理/污泥脱水/污泥性质/调理条件/作用机制Key words
Fenton conditioning/dewatering/sludge properties/conditioning conditions/mechanism分类
环境科学引用本文复制引用
姚欣泽,王定山,董文艺,王宏杰,赵子龙..Fenton氧化调理改善剩余污泥脱水性能及作用机制[J].环境工程学报,2025,19(4):805-814,10.基金项目
2020年可持续发展科技专项资助项目(KCXFZ202002011006362) （KCXFZ202002011006362）
