A Study on the Optimal Management Technology of the On-site Sodium Hypochlorite Generator for Disinfection By-products Reduction
Objectives The purpose of this study is to suggest operating conditions that can minimize the disinfection by-products of sodium hypochlorite produced in on-site sodium hypochlorite generators. Methods The characteristics of disinfection by-products were investigated by operating conditions (dissolv...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Korean Society of Environmental Engineers
2022-12-01
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| Series: | 대한환경공학회지 |
| Subjects: | |
| Online Access: | http://www.jksee.or.kr/upload/pdf/KSEE-2022-44-12-525.pdf |
| _version_ | 1811164908121751552 |
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| author | No-suk Park Suk-min Yoon Sang-min Park Hyeon-jeong Yun Mi-ae Yun Young-joo Lee |
| author_facet | No-suk Park Suk-min Yoon Sang-min Park Hyeon-jeong Yun Mi-ae Yun Young-joo Lee |
| author_sort | No-suk Park |
| collection | DOAJ |
| description | Objectives The purpose of this study is to suggest operating conditions that can minimize the disinfection by-products of sodium hypochlorite produced in on-site sodium hypochlorite generators. Methods The characteristics of disinfection by-products were investigated by operating conditions (dissolved water type, brine concentration, temperature of electrolytic cell inflow water, pH of electrolytic cell inflow water and electrolyzer current density) using a on-site sodium hypochlorite generator(5 kg/day). Results and Discussion The concentration of disinfection by-products (chlorate, bromate) according to the type of dissolved water was found to be high in the order of softened water > tap water > RO treated water. As the brine concentration increased, chlorate decreased and bromate increased. The optimal saline concentration was found to be 3% or more. As temperature of electrolytic cell inflow water increases,, chlorate decreases and bromate increases. The difference in the concentration of disinfection by-products(chlorate, bromate) according to the pH of electrolytic cell inflow water is not large, and the appropriate pH is determined to be about 7 when the free available chlorine and disinfection by-products are taken into account. Also, as the current density increases, the chlorate increases and bromate showed a decreasing trend. Conclusion It has been shown that the concentration of disinfection by-products can be minimized when operating within the operating range suggested by the on-site sodium hypochlorite generator manufacturer, and some operating conditions are thought to have been suggested by the manufacturer to protect the electrolyzer cells. As the market for on-site sodium hypochorite generator gradually expands, it is expected that improved facilities will be continuously released in consideration of the stricter standards for disinfection by-products. |
| first_indexed | 2024-04-10T15:28:50Z |
| format | Article |
| id | doaj.art-2ca64f02c762419e8b1c297085b94522 |
| institution | Directory Open Access Journal |
| issn | 1225-5025 2383-7810 |
| language | English |
| last_indexed | 2024-04-10T15:28:50Z |
| publishDate | 2022-12-01 |
| publisher | Korean Society of Environmental Engineers |
| record_format | Article |
| series | 대한환경공학회지 |
| spelling | doaj.art-2ca64f02c762419e8b1c297085b945222023-02-14T07:18:15ZengKorean Society of Environmental Engineers대한환경공학회지1225-50252383-78102022-12-01441252553310.4491/KSEE.2022.44.12.5254422A Study on the Optimal Management Technology of the On-site Sodium Hypochlorite Generator for Disinfection By-products ReductionNo-suk Park0Suk-min Yoon1Sang-min Park2Hyeon-jeong Yun3Mi-ae Yun4Young-joo Lee5Department of Civil Engineering and Engineering Research Institute, Gyeongsang National University, Republic of KoreaDepartment of Civil Engineering and Engineering Research Institute, Gyeongsang National University, Republic of KoreaWater Supply and Sewerage Research Division, National Institute of Environmental Research, Republic of KoreaNakdong River Environmental Research Center, National Institute of Environmental Research, Republic of KoreaWater Environmental Safety Management Dept., K-water, Republic of KoreaWater & Wastewater Research Center, K-water Research Institute, Republic of KoreaObjectives The purpose of this study is to suggest operating conditions that can minimize the disinfection by-products of sodium hypochlorite produced in on-site sodium hypochlorite generators. Methods The characteristics of disinfection by-products were investigated by operating conditions (dissolved water type, brine concentration, temperature of electrolytic cell inflow water, pH of electrolytic cell inflow water and electrolyzer current density) using a on-site sodium hypochlorite generator(5 kg/day). Results and Discussion The concentration of disinfection by-products (chlorate, bromate) according to the type of dissolved water was found to be high in the order of softened water > tap water > RO treated water. As the brine concentration increased, chlorate decreased and bromate increased. The optimal saline concentration was found to be 3% or more. As temperature of electrolytic cell inflow water increases,, chlorate decreases and bromate increases. The difference in the concentration of disinfection by-products(chlorate, bromate) according to the pH of electrolytic cell inflow water is not large, and the appropriate pH is determined to be about 7 when the free available chlorine and disinfection by-products are taken into account. Also, as the current density increases, the chlorate increases and bromate showed a decreasing trend. Conclusion It has been shown that the concentration of disinfection by-products can be minimized when operating within the operating range suggested by the on-site sodium hypochlorite generator manufacturer, and some operating conditions are thought to have been suggested by the manufacturer to protect the electrolyzer cells. As the market for on-site sodium hypochorite generator gradually expands, it is expected that improved facilities will be continuously released in consideration of the stricter standards for disinfection by-products.http://www.jksee.or.kr/upload/pdf/KSEE-2022-44-12-525.pdfon-site sodium hypochlorite generatorfree available chlorinechloratebromateoptimal operation conditions |
| spellingShingle | No-suk Park Suk-min Yoon Sang-min Park Hyeon-jeong Yun Mi-ae Yun Young-joo Lee A Study on the Optimal Management Technology of the On-site Sodium Hypochlorite Generator for Disinfection By-products Reduction 대한환경공학회지 on-site sodium hypochlorite generator free available chlorine chlorate bromate optimal operation conditions |
| title | A Study on the Optimal Management Technology of the On-site Sodium Hypochlorite Generator for Disinfection By-products Reduction |
| title_full | A Study on the Optimal Management Technology of the On-site Sodium Hypochlorite Generator for Disinfection By-products Reduction |
| title_fullStr | A Study on the Optimal Management Technology of the On-site Sodium Hypochlorite Generator for Disinfection By-products Reduction |
| title_full_unstemmed | A Study on the Optimal Management Technology of the On-site Sodium Hypochlorite Generator for Disinfection By-products Reduction |
| title_short | A Study on the Optimal Management Technology of the On-site Sodium Hypochlorite Generator for Disinfection By-products Reduction |
| title_sort | study on the optimal management technology of the on site sodium hypochlorite generator for disinfection by products reduction |
| topic | on-site sodium hypochlorite generator free available chlorine chlorate bromate optimal operation conditions |
| url | http://www.jksee.or.kr/upload/pdf/KSEE-2022-44-12-525.pdf |
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