Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Chlorine Decay and Chlorate Formation in Two Water Treatment Facilities
In recent years, many water treatment facilities have switched from chlorine gas to low‐ (0.8%) and high‐strength (10–12%) hypochlorite because of safety considerations, and many others are considering the transition. However, hypochlorite, especially when stored at high temperatures, can introduce disinfection by‐products such as chlorate, perchlorate, and bromate into the drinking water. Chlorate was included in the third US Environmental Protection Agency Contaminant Candidate List and is under examination as a part of the current Microbial and Disinfection Byproduct regulations review. Results of investigation of chlorine decay and chlorate formation at two water treatment facilities that use high‐strength hypochlorite for water disinfection are presented in this article. Correlations between chlorate in hypochlorite and finished water were examined in the study. The research also investigated the quality of supplied and stored hypochlorite and its impact on chlorate formation and hypochlorite decay. The loss in chlorine strength and chlorate formation over time were compared with AWWA's hypochlorite assessment model.
Chlorine Decay and Chlorate Formation in Two Water Treatment Facilities
In recent years, many water treatment facilities have switched from chlorine gas to low‐ (0.8%) and high‐strength (10–12%) hypochlorite because of safety considerations, and many others are considering the transition. However, hypochlorite, especially when stored at high temperatures, can introduce disinfection by‐products such as chlorate, perchlorate, and bromate into the drinking water. Chlorate was included in the third US Environmental Protection Agency Contaminant Candidate List and is under examination as a part of the current Microbial and Disinfection Byproduct regulations review. Results of investigation of chlorine decay and chlorate formation at two water treatment facilities that use high‐strength hypochlorite for water disinfection are presented in this article. Correlations between chlorate in hypochlorite and finished water were examined in the study. The research also investigated the quality of supplied and stored hypochlorite and its impact on chlorate formation and hypochlorite decay. The loss in chlorine strength and chlorate formation over time were compared with AWWA's hypochlorite assessment model.
Chlorine Decay and Chlorate Formation in Two Water Treatment Facilities
Breytus, Anna (Autor:in) / Kruzic, Andrew P. (Autor:in) / Prabakar, Srinivas (Autor:in)
Journal ‐ American Water Works Association ; 109 ; E110-E120
01.04.2017
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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