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http://dx.doi.org/10.15681/KSWE.2011.27.6.17

Tertiary Treatment of Sewage by Micro Bubble Ozone and BAF System  

Kang, Dong-Han (Gyeonggi-do Institude of Health & Environment)
Jang, Young-Ho (Gyeonggi-do Institude of Health & Environment)
Kim, Jong-Su (Gyeonggi-do Institude of Health & Environment)
Kim, Keug-Tae (Gyeonggi-do Institude of Health & Environment)
Publication Information
Journal of Korean Society on Water Environment / v.27, no.6, 2011 , pp. 877-884 More about this Journal
Abstract
In this paper, the removal characteristics of dissolved organic carbon (DOCs) by micro bubble ozonation process and $O_3/UV$ process were comparatively studied. In the point of DOC removing reaction coefficient, micro bubble ozonation system and $O_3/UV$ process had not significant difference, $0.0120sec^{-1}$ and $0.0141sec^{-1}$. Therefore micro bubble ozonation process is more suitable for tertiary treatment of sewage in the point of installation and maintenance cost-reducing. The optimum ozone injection rate was 2.0 g $O_3/g$ DOC and HRT was 3 min for the micro bubble ozonation process. The removal efficiency of DOC and SUVA in micro bubble ozonation system was 32.8% and 58.3% respective. Biological aerated filter (BAF) process was installed to remove soluble organic material increased by micro bubble ozonation system. And the effluent BOD of BAF was below 1.0 mg/L. In the view of cost-effectiveness, $O_3/BAF$ process was more profitable than $O_3/UV/BAF$ process for tertiary treatment of sewage. In order to nitrify ammonia in the BAF process completely, $NH_4{^+}-N$ concentration in the influent water of BAF should be designed considering low water temperature in the winter season.
Keywords
Advanced oxidation process (AOP); Biological aerated filter (BAF); Dissolved organic carbon (DOC); SUVA; Wastewater;
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Times Cited By KSCI : 1  (Citation Analysis)
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