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Disinfection of treated wastewater as an essential purification step for safe urban reuse: a comparative pilot study of UV- and ClO2-disinfection systems for urban reuse applications in China

Bischoff, Astrid and Fan, J. H. and Cornel, Peter and Wagner, Martin and Ma, L. M. (2013):
Disinfection of treated wastewater as an essential purification step for safe urban reuse: a comparative pilot study of UV- and ClO2-disinfection systems for urban reuse applications in China.
In: Journal of Water Reuse and Desalination, IWA Publishing, pp. 325-335, 3, (3), ISSN 2220-1319,
DOI: 10.2166/wrd.2013.087,
[Online-Edition: http://jwrd.iwaponline.com/content/3/3/325],
[Article]

Abstract

Disinfection of wastewater is vital in addressing the potential health risks of urban water reuse. To compare the applicability of wastewater disinfection methods other than chlorine, identical pilot plants that used ultraviolet (UV) irradiation and chlorine dioxide (ClO2) dosing were installed at municipal wastewater treatment plants in Shanghai, China and Darmstadt, Germany. The investigation included public health and environmental aspects associated with the two disinfection methods. The results of the pilot-scale studies suggest that, in order to comply with Chinese water quality standards for urban water reuse, it is advisable to have a tertiary treatment before wastewater disinfection. Both methods were able to achieve a 4 log10 reduction in both total coliforms and Escherichia coli (E. coli). There was no evidence for regrowth of E. coli. However, after an initial 3 log10 reduction, HPC increased within 48 h by more than 10-fold after UV irradiation as well as after low doses of ClO2. An increase in acute toxicity was detected after dosing with ClO2 but not after UV irradiation.

Item Type: Article
Erschienen: 2013
Creators: Bischoff, Astrid and Fan, J. H. and Cornel, Peter and Wagner, Martin and Ma, L. M.
Title: Disinfection of treated wastewater as an essential purification step for safe urban reuse: a comparative pilot study of UV- and ClO2-disinfection systems for urban reuse applications in China
Language: English
Abstract:

Disinfection of wastewater is vital in addressing the potential health risks of urban water reuse. To compare the applicability of wastewater disinfection methods other than chlorine, identical pilot plants that used ultraviolet (UV) irradiation and chlorine dioxide (ClO2) dosing were installed at municipal wastewater treatment plants in Shanghai, China and Darmstadt, Germany. The investigation included public health and environmental aspects associated with the two disinfection methods. The results of the pilot-scale studies suggest that, in order to comply with Chinese water quality standards for urban water reuse, it is advisable to have a tertiary treatment before wastewater disinfection. Both methods were able to achieve a 4 log10 reduction in both total coliforms and Escherichia coli (E. coli). There was no evidence for regrowth of E. coli. However, after an initial 3 log10 reduction, HPC increased within 48 h by more than 10-fold after UV irradiation as well as after low doses of ClO2. An increase in acute toxicity was detected after dosing with ClO2 but not after UV irradiation.

Journal or Publication Title: Journal of Water Reuse and Desalination
Volume: 3
Number: 3
Publisher: IWA Publishing
Divisions: 13 Department of Civil and Environmental Engineering Sciences > Institute IWAR
13 Department of Civil and Environmental Engineering Sciences > Institute IWAR > Wastewater Technology
13 Department of Civil and Environmental Engineering Sciences
Date Deposited: 06 Sep 2017 13:59
DOI: 10.2166/wrd.2013.087
Official URL: http://jwrd.iwaponline.com/content/3/3/325
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