以污泥比阻降低率和泥饼含水率为评价指标，采用Fe⁰/H₂O₂类芬顿法提高污泥脱水性能，研究初始pH、Fe⁰投加量、H₂O₂投加量对污泥脱水性能的影响，并探究其调理机理。结果表明，当初始pH为2.5，Fe⁰、H₂O₂投加量分别为750、20 mg/g TS时，污泥比阻降低率为93.7%，泥饼含水率为73%，零价铁回收率为98.3%。Fe⁰重复利用10次后，比阻降低率仍能保持在90%以上。类芬顿法能够有效降解污泥胞外聚合物，破坏其絮体结构，导致污泥粒径减小，并释放部分结合水，从而有效改善污泥脱水性能。

A Fenton-like method based on combining zero-valent iron (ZVI) and hydrogen peroxide (HP) is applied to improve the dewaterability of waste activated sludge (WAS).The effects of initial pH,the dosages of Fe⁰ and H₂O₂ on the dewatering performance and mechanism of sludge are investigated through using specific resistance to filtration (SRF) reduction rate and water content of sludge cake as evaluation indexes.The results show that the optimal values for H₂O₂,Fe⁰ and initial pH are 20 mg·g^-1 TS,750 mg·g^-1 TS and 2.5 respectively.Under optimal conditions,SRF reduction rate achieves 93.7%,water content in sludge cake is 73% and the recovery rate of zero-valent iron achieves 98.3%.Furthermore,SRF reduction rate of sludge remains more than 90% after 10 times reuse of Fe⁰.Fenton-like Fe⁰/H₂O₂ process can degrade effectively extracellular polymeric substances (EPS) of sludge and destroy sludge flocs,so that sludge particle sizes become smaller and bound water is released from sludge aggregates,which thereby improving effectively the dewaterability of sludge.

王丽苹(1992-),女,硕士研究生,研究方向为水污染控制,3311068350@qq.com