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http://dx.doi.org/10.15681/KSWE.2022.38.6.267

Demonstration of Low-carbon Pre-oxidation Technology for Algae Using Sodium Permanganate  

Junsoo, Ha (Bluetech Co.)
Daniel Sangdu, Hur (Prosol Co.)
Chaieon, Im (Prosol Co.)
Donghee, Jung (KCNAC Co.)
Youngseong, Lim (Changwon_Chilseo WTP)
Jinkyong, Ju (Changwon_Chilseo WTP)
Publication Information
Journal of Korean Society on Water Environment / v.38, no.6, 2022 , pp. 267-274 More about this Journal
Abstract
This paper is a result of research conducted on the 800,000 m3/d capacity of A Water Treatment Plant (WTP) and 400,000 m3/d capacity of B WTP plant in operation in the Nakdong River region. We evaluated the effect of algae broom on the WTP operation based on the running data of both WTP and the data on the pre-oxidation process field test for algae control using sodium permanganate (SPM) at the B WTP. The study results showed that during the algal bloom period, the coagulant dose increased by 102% in A WTP and 58% in B WTP, respectively, and the chlorine dose also increased by 38% and 29%, respectively, which may affect Total trihalomethane (THM) production. Data such as algal populations and Chl-a, residual chlorine and THM, algal populations, and ozone dose appeared also highly correlated, confirming that algal broom affects WTP operations, including water quality and chemical dosage. As a result of the field test of B WTP, THMs appeared lower than that of the control, suggesting the possibility of the SPM pre-oxidation process as an alternative to algae-related water quality management. Furthermore, in terms of GHG emissions due to energy consumption, it was observed that the pre-oxidation process using SPM was approximately 10.8%, which is a very low ratio compared to the pre-ozonation process. Therefore, these results suggest that the SPM pre-oxidation process can be recommended as an alternative to low-carbon water purification technology.
Keywords
Algae bloom; Chemical dosages; Greenhouse gas (GHG); Sodium permanganate (SPM); Water treatment plant (WTP);
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