김승현 윤종섭 이석헌 2024-01-20T21:33:58Z 2024-01-20T21:33:58Z 2021-09-06 2009-04 1225-7672 https://pubs.kist.re.kr/handle/201004/132595 This study examines the optimum filtration conditions in pretreatment of seawater desalination by reverse osmosis. For this purpose, Masan bay seawater is treated through a gravity filter column while FeCl3 is added as coagulant. The conditions of coagulantd osage, media depth, filtration rate, and backwash time are evaluated. The study results show that the filtrate quality improved with increasing coagulant dosage, but head loss rapidly increased. After 4mg/L, the unit filter run volume reduced to less than 200㎥/㎡. Considering the head loss development, 4mg/L is determined as the optimum dosage. The better filtrate qualities are obtained with depth of 100cm than that of 80cm. The two stage filtration, which outperformed the single stage filtration, is suggested for treatment of Masan bay. The filtration rate of 5m/h is decided as the optimum condition considering the head loss development. At 10m/h, the filtrate quality deteriorated even though the extent was minimal, and head loss increased rapidly. The backwash time of 10 min is decided appropriate. Korean 대한상하수도학회 역삼투법 해수담수화 전처리 여과공정의 최적조건 Determination of the optimum filtration conditions in pretreatment of seawater desalination by reverse osmosis Article 2 상하수도학회지, v.23, no.2, pp.207 - 214 상하수도학회지 23 2 207 214 kci ART001336223 해수담수화 여과 응집제 주입량 여과속도 여재층 높이 역세척 시간 seawater desalination filtration coagulant dosage filtration rate media depth backwash time