环境工程学报2026，Vol.20Issue(8)：2697-2707,11.DOI:10.12030/j.cjee.202601103
NaClO-TA协同调理改善污泥脱水性能及作用机制
NaClO-TA co-conditioning improves the dewatering performance of residual sludge and its mechanism of action
摘要
Abstract
Residual activated sludge(WAS)generally contains more than 90%water,which severely restricts its reduction and disposal.To overcome the limitations of conventional chemical conditioners that rely mainly on charge neutralization and bridging effects,this study proposes a NaClO-TA co-conditioning method.Under the conditions of 25℃,pH 7.55,and a reaction time of 5 min,with TA and NaClO dosages of 0.15 and 0.6 mmol·g-1 TS,respectively,the specific resistance to filtration(SRF),capillary suction time(CST),and water content(WC)decreased from 11.224×1012 m·kg-1,78.6 s,and 83.37%to 3.676×1012 m·kg-1,26.5 s,and 75.30%.Mechanistic analysis revealed that the oxidative action of NaClO disrupted EPS and cell structures,releasing intracellular water and facilitating the transformation of bound water into free water,while TA reduced the water-holding capacity of proteins and polysaccharides through complexation and precipitation.These complementary effects constituted a synergistic mechanism that markedly improved sludge filterability.Compared with traditional inorganic salts or polymer flocculants,this method achieved deep dewatering at low dosage with minimized risk of secondary pollution,demonstrating environmental friendliness and engineering potential,particularly in reducing chemical dosage and minimizing secondary pollution.关键词
污泥脱水/单宁酸/次氯酸钠/蛋白质化合物/Zeta电位Key words
sludge dewatering/TA/sodium hypochlorite/protein compounds/Zeta potential分类
资源环境引用本文复制引用
潘伟亮,李莎,冷思贤,张汛,古励,何强,李勇..NaClO-TA协同调理改善污泥脱水性能及作用机制[J].环境工程学报,2026,20(8):2697-2707,11.基金项目
重庆市技术创新与应用发展专项重点资助项目(CSTB2022TIAD-KPX0201) （CSTB2022TIAD-KPX0201）
重庆市自然科学基金资助项目(CSTB2022NSCQ-MSX1438) （CSTB2022NSCQ-MSX1438）
重庆市研究生联合培养基地资助项目(JDLHPYJD2024004) （JDLHPYJD2024004）
