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논문 기본 정보

자료유형
학술저널
저자정보
황환도 (대구시상수도사업본부 수질관리과) 임상호 (대구시 매곡정수사업소) 성규종 (대구시 매곡정수사업소) 한영진 (대구시 매곡정수사업소) 김영범 ([주]에코노벨 기술연구소) 곽종운 ([주]에코노벨 기술연구소)
저널정보
대한상하수도학회 상하수도학회지 상하수도학회지 제23권 제4호
발행연도
2009.1
수록면
397 - 406 (10page)

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This study was conducted to monitor the floc sizes forming in the mixing zone in the water treatment plant. The dosing amount of poly aluminium chloride(PAC) was determined by particle dispersion analyzer(iPDA) in the lab and field scale test. During a field test period, PAC coagulant was used and the raw water was taken from Nakdong river. PAC wad diluted to activate the coagulant, leading to bring the more homogeneous dispersion in the shorter time. To monitor the floc sizes, the unit of floc size index(FSI) was used. With increasing of raw water turbidity, FSI value was increased. Also, the increased dosing amount of PAC brought the increased FSI and with overdosing of coagulant was in turn decreased. When the PAC was fed into the raw water after dilution in a field scale test, the width of FSI was narrower compared with the feeding of the mother liquor of PAC, implying that the formed flocs are denser and more uniform sizes. The width of FSI in average was varied on depending on the basicity of coagulant. Also, dF value, fractal dimension was evalued with the different coagulants, showing from 2.01 to 2.03. On-line floc monitor was effective for the optimal dosing in the drinking water plant.

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