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DOI : 10.17640/KSWST.2020.28.4.33 , Vol.28, No.4, 33 ~ 43, 2020
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| Title |
| Decision of Optimal Coagulant Dosage for SeDAF (Sedimentation and Dissolved Air Flotation) Process Applicable to Enhanced Phosphorus Removal |
| 장여주 Yeoju Jang , 정진홍 Jinhong Jung , 장향연 Hyangyoun Chang , 박나리 Nari Park , 임현만 Hyunman Lim , 김원재 Weonjae Kim |
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| Abstract |
| Algal blooms are caused by eutrophication, increased water temperature, and reduced water flow rate, and produce taste·odor compounds and health problems associated with cyanobacterial toxins. To prevent eutrophication and algal blooms, the Ministry of Environment (MOE) in Korea reinforced effluent standards for wastewater treatment facilities and, as a result, spurred the implementation of various advanced wastewater treatment processes to achieve compliance. Current tertiary wastewater treatment techniques are conventionally single processes, such as sedimentation or flotation, and have high operational costs and produce undesirable sludge problems due to excessive coagulant injection. Here, we develop a sedimentation and dissolved air flotation (SeDAF) process that integrates sedimentation and flotation for applications in advanced wastewater treatment. Jar-tests were used to evaluate water quality and treatment efficiency for sedimentation and sedimentation·flotation processes, respectively. Equations that estimate the optimal coagulant dosage are proposed to enhance the field applicability of the SeDAF process. Two types of jar-tests, both sedimentation and sedimentation·flotation, and multiple regression analyses are comprehensively examined to identify appropriate operation conditions for the SeDAF process considering fluctuations in field conditions such as T-P concentration, PO4-P / T-P ratio, turbidity, and flow rate etc. |
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| Key Words |
| Enhanced phosphorus removal, Flotation, Phosphorus, Suspended solid removal, Sedimentation, Sedimentation, Dissolved air flotation process, SeDAF process, Wastewater treatment, 인 고도처리, 부상, 인·고형물 제거, 침전, 침전부상공정, SeDAF, 하수처리 |
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