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在试点规模上优化臭氧处理以消除病原体和消毒副产品控制,以便在饮用品中重复使用

Leticia Reggiane de Carvalho Costa¹, Lin Li², Laura Haak²

¹Department of Chemical Engineering, Federal University of Rio Grande Do Sul, Porto Alegre, 2777 Ramiro Barcelos St, RS, 90035-007, Brazil.

|August 19, 2024

概括

臭氧化有效地减少了回收水中的病原体,但增加了诸如酸盐和NDMA等消毒副产品. 较高的臭氧剂量增强了病原体的无活化,但也促进了副产品的形成,需要进一步处理可饮用的再利用.

科学领域:

环境科学环境科学
水处理工程水处理工程
微生物学微生物学

背景情况:

再生水含有有机微污染物和病原体,对健康构成风险.
臭氧化对于可再生饮用水中的病原体控制至关重要.
与消毒副产品 (DBP) 的形成平衡病原体无活化是一个关键的挑战.

研究的目的:

调查插头流反应器 (PFR) 中的臭氧化条件,以有效去除病原体.
在臭氧化过程中最大限度地减少酸盐和N-二甲基胺 (NDMA) 的形成.
用实际的回收水评估消毒性能.

主要方法:

使用插头流反应器 (PFR) 进行试点规模研究.
应用了三个臭氧剂量:0.7,1.0和1.4毫克O3/mgTOC.
通过测量总大肠杆菌,大肠杆菌,PMMoV,ToBRFV和HNoV来评估消毒效率.

主要成果:

臭氧CT值在1.60至13.62毫克/分钟/升之间,实现了显著的病原体减少.
观察到的日志性减少:2.46-2.89 (总大肠杆菌),2.03-2.18 (大肠杆菌),0.46-1.63 (PMMoV),2.23-2.64 (ToBRFV) 和>4 (HNoV) 的情况.
酸盐和NDMA分别增加到2.812.0μg/L和2840.0ng/L,臭氧剂量更高.

结论:

臭氧化有效地使回收水中的一系列病原体失活.
增加臭氧剂量导致酸盐和NDMA形成的增加.
对于饮用再利用应用,DBP控制可能需要额外的处理步骤.

关键词:

消毒消毒消毒消毒消毒副产品消毒的副产品臭氧臭氧是什么?臭氧臭氧是一种病原体日志减少值的减少值在试点规模进行治疗.重新利用水的方法

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