The Journal of
the Korean Society on Water Environment

The Journal of
the Korean Society on Water Environment

Bimonthly
  • ISSN : 2289-0971 (Print)
  • ISSN : 2289-098X (Online)
  • KCI Accredited Journal

Editorial Office

Title Demonstration of Low-carbon Pre-oxidation Technology for Algae Using Sodium Permanganate
Authors 하준수 ( Junsoo Ha ) ; 허다니엘상두 ( Daniel Sangdu Hur ) ; 임채언 ( Chaieon Im ) ; 정동희 ( Donghee Jung ) ; 임영성 ( Youngseong Lim ) ; 주진경 ( Jinkyong Ju )
DOI https://doi.org/10.15681/KSWE.2022.38.6.267
Page pp.267-274
ISSN 2289-0971
Keywords Algae bloom; Chemical dosages; Greenhouse gas; GHG; Sodium permanganate; SPM; Water treatment plant; WTP
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.