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논문 기본 정보

자료유형
학술저널
저자정보
문상욱 (대한환경) 최호은 (대한환경(주)) 최영익 (동아대학교) 성낙창 (동아대학교) 정병길 (동의대학교)
저널정보
한국환경기술학회 한국환경기술학회지 한국환경기술학회지 제21권 제6호
발행연도
2020.1
수록면
411 - 419 (9page)

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The purpose of this research was to develop a nanobubble multihydrocyclone pretreatment technology that supplies SDI (Silt Density Index) of below 3 in order as alternative to, and etc. the existing coagulation filtration pretreatment process in seawater desalination. The used seawater in this research was sampled at a depth of 5 m in the sea located in B City. The average water quality of seawater was found to be turbidity of 1.28 NTU, TDS 29,800 mg/L, hardness 3,330 mg/L as CaCO3, total colony counts 190 CFU/100 mL, total coliforms 1,400 CFU/100 mL, and SO42- 1,890 mg/L. The nanobubble multi-hydrocyclone pretreatment process was consisted of a nanobubble generator, hydrocyclone, carbon filter, microfilter, RO pump, RO and UV systems. As a result of measuring (average of 5 times) the SDI of raw seawater, pretreated water, secondary treated water and final effluent were found to be 5.74, 3.42, 2.88 and 0.27, respectively. It was satisfied the SDI standard value of below 5 for seawater desalination pretreatment process. As a result of an economic evaluation for the coagulation sedimentation filtration process, the direct coagulation filtration process and the nanobubble multihydrocyclone process, which are the pretreatment processes for seawater desalination, the production cost per ton were 4,850 Won/m3, 4,528 Won/m3, and 3,821 Won/m3, respectively. Therefore, it was found that the nanobubble multi-hydrocyclone pretreatment process reduces operating costs by about 21% compared to other pretreatment processes.

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