藻类
原水
氯
化学
胞外聚合物
有机质
水处理
环境化学
溶解有机碳
生物膜
水华
原材料
制浆造纸工业
环境工程
环境科学
生态学
营养物
浮游植物
有机化学
细菌
生物
遗传学
工程类
作者
Yueting Wang,Hang Xu,Yue Hao,Bonan Liu,Mingmei Ding,Tong Lin,Tianpei Mo,Li Gao,Lei Zhang
标识
DOI:10.1016/j.jhazmat.2022.130306
摘要
Prechlorination routinely applied for the treatment of algae-laden raw water has received extensive attention due to its influence on water quality and aquatic microbes. In this study, prechlorination experiments with different doses were conducted in sets of model raw water distribution systems. With the elevated dose of chlorine and prolonged hydraulic retention time (HRT), the ratio of intact algal cells decreased, and the stability of water enhanced. Dissolved organic carbon (DOC) and nitrogen (DON) increased when chlorine dose elevated from 0 to 0.5 mg/L but decreased with elevations from 0.5 to 2.0 mg/L, while UV254 showed a monotonically increasing tendency. DOC, DON and extracellular microcystin-LR increase initially and decrease thereafter with the prolonged HRT. Notably, the effects of prechlorination on extracellular polymeric substances aggregation behavior on pipe walls and microbial community composition was revealed, providing more profound understanding of the community dynamics in this engineered system. This study helped optimize strategies to improve the stability and efficiency of pretreatment of algae-laden water.
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