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J Korean Soc Environ Eng > Volume 41(6); 2019 > Article
J Korean Soc Environ Eng 2019;41(6): 328-336. doi: https://doi.org/10.4491/KSEE.2019.41.6.328
미세기포를 이용한 호소 퇴적토의 인 부상분리 및 인의 거동특성 평가
최용호1, 정용훈2, 양종원1, 채인석1, 곽동희1,2
1전북대학교 생리활성소재과학과
2전북대학교 정읍산학연협력지원센터
Flotation and Behavior Characteristics Estimation of Phosphorus in Sediments of Lake Using Micro-bubble
Yong-Ho Choi1, Yong-Hoon Jeong2, Jong-Won Yang1, In-Seok Chae1, Dong-Heui Kwak1,2
1Department of Bioactive Materials Science, Chonbuk National University
2Center for Jeongeup Academy-Industy Cooperation, Chonbuk National University
Corresponding author  Dong-Heui Kwak ,Tel: 063-530-7611, Fax: 063-530-7619, Email: kwak124@jbnu.ac.kr
Received: March 19, 2019;  Revised: May 14, 2019;  Accepted: May 22, 2019.  Published online: June 30, 2019.
Phosphorus (P) released under the anoxic condition in the sediments of stagnant water body acts as a nutrients source on the eutrophication of lake and hinders water management and nutrients control. In order to remove P in the sediments, a hypothetical condition that micro-bubbles are injected on the bottom surface of sediment layer was configured, and a series of experiment was carried out on the basis of the laboratory scale of the stepwise flotation process. The experiment results which the removal efficiency of T-P (total phosphorus), PO4-P, and SRP (soluble reactive phosphorus) was investigated and the behavior characteristics of P was evaluated revealed that effective removal efficiency of P contained in the sediment could be achieved by the flotation using micro-bubbles. The operation conditions of flotation including flocculation time were different from the typical water treatment processes, and especially the molar ratio of Al to P was stable in the high range of 15~20 rather than the advanced treatment process of municipal wastewater treatment plants. On the other hand, the surface film layer formed by the re-sediments and contained aluminum after flotation can perform an effective function as capping to block P release from the deep sediments.
Key Words: Bubble, Flotation, Phosphorus, Release, Sediment
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