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http://dx.doi.org/10.5293/kfma.2017.20.2.069

A Study on the Stable Operation of High Sodium Hypochlorite Generation  

Cho, Haejin (K-water)
Na, Chanwook (K-water)
Ko, Sungho (School of Mechanical Engineering Chungnam National University)
Publication Information
The KSFM Journal of Fluid Machinery / v.20, no.2, 2017 , pp. 69-74 More about this Journal
Abstract
Sodium hypochlorite, used as water disinfectant, is generated by electrolysis of salt. Compared to chlorine gas disinfection, it is free from high-pressure gas regulation and does not generate toxic gas, so it is increasingly used as a safe disinfectant. Despite these advantages, the concentration of sodium hypochlorite decreases with temperature during long-term storage, and the amount of chlorate increases when a large amount is added, it has mainly been applied to small-scale waterworks. To solve this problem, high sodium hypochlorite generation was developed. In this study, the changes of concentration and chlorate of sodium hypochlorite with time has been studied. As a result of the test, it was found that the usable period of sodium hypochlorite produced at a certain temperature or less was increased from 1.5 days to 13 days. Overall, sodium hypochlorite can be applied even in large-scale waterworks, which makes operation more stable and also reduces the disinfection byproducts, thus it contributed greatly to securing water quality.
Keywords
Disinfection Process; Drinking Water Treatment; Electrolytic Cell; High Sodium Hypochlorite Generation;
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