预氯化输水对表面停留性有机物及混凝除藻的影响  

Effect of pre-chlorination on surface-adsorbed organic matter and coagulation for algae removal in water transportation

作　　者：倪蓉 姜元承 李海燕 王茜[2] 张长禄 吴佳萍 谢琤琤 张明顺 戚菁[2] 胡承志[2] NI Rong;JIANG Yuancheng;LI Haiyan;WANG Xi;ZHANG Changlu;WU Jiaping;XIE Chengcheng;ZHANG Mingshun;QI Jing;HU Chengzhi(School of Environmental and Energy Engineering,Beijing University of Civil Engineering and Architecture,Beijing 102616,China;Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;CSD New Concept Environmental Development Yixing Co.Ltd.,Yixing 214000,China)

机构地区：[1]北京建筑大学,环境与能源工程学院,北京102616 [2]中国科学院生态环境研究中心,北京100085 [3]中持新概念环境发展宜兴有限公司,宜兴214000

出　　处：《环境工程学报》2024年第1期130-138,共9页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(52170014,51820105011);长江生态环境保护修复联合研究第二期(2022-LHYJ-02-0303)。

摘　　要：针对预氯化这一常用的预氧化方法,考察了表面停留性有机物(S-AOM)在这一过程中对铜绿微囊藻起到的关键作用。同时,探讨了表面停留性有机物及藻的氧化应激对混凝除藻效果的影响。结果表明,预氯化过程可实现适度预氯化的最佳氯投加量,适度预氯化可以在实现脱附S-AOM的同时不损伤藻细胞,强化后续混凝除藻的效果。此外,经过适度预氯化后的藻细胞在远程输水过程中可能会发生程序性死亡,胞内有机物不断泄漏,这仍会对水厂混凝除藻效果产生不利影响。因此,预氧化后藻细胞发生程序性死亡是预氯化强化混凝工艺需要考虑的关键因素。Aiming at the pre-chlorination,a commonly used pre-oxidation method,the pivotal role played by surface-adsorbed organic matter(S-AOM) in this process on Microcystis aeruginosa was studied,the influence of S-AOM and algal oxidative stress on coagulation for Microcystis aeruginosa removal was also investigated.The results showed that pre-chlorination could determine the optimal chlorine dosage for achieving moderate pre-chlorination.Moderate pre-chlorination effectively promoted the desorption of S-AOM without causing harm to algal cells,thereby enhanced the subsequent coagulation-based algal removal.In addition,that algal cells subjected to moderate pre-chlorination might undergo programmed cell death during long-distance water transmission,and the continual leakage of intracellular organic matter occurred,which could still adversely affect the efficiency of algal removal during water treatment.Therefore,the programmed cell death of algal cells caused by pre-chlorination emerges as a critical factor to consider in enhancing coagulation-based algal removal processes.

关 键 词：表面停留性有机物 预氯化 除藻 混凝 

分 类 号：X703[环境科学与工程—环境工程]