title: Effects of longitudinal baffles on particles settling in a sedimentation basin.
abstract: This study was conducted to evaluate the effects of longitudinal baffles on particles settling performance within a full-scale sedimentation basin with a flow rate of 1,000 m(3)/hr. Comparative experiments on turbidity removal efficiency and sludge deposit distribution were performed in longitudinally baffled and non-baffled sedimentation basins. The turbidity removal rate in the baffled sedimentation basin was observed to be higher than that in the non-baffled basin. In addition, the depth of the sludge deposit in the baffled sedimentation basin was approximately 20% less than that in the non-baffled sedimentation basin, and the sludge concentration was 10% higher. To explain these results and to further investigate the effects of longitudinal baffles, the authors performed computational fluid dynamics (CFD) simulation for both basin types. The results of this CFD simulation indicated that the flow, particularly near the outlet orifice, was more stable in the longitudinally baffled sedimentation basin. Moreover, it could be concluded that the longitudinal baffle enables a fully developed flow and is thus more effective for sedimentation.
authors.affiliation: Department of Civil Engineering, Gyeongsang National University, 501, Jinju-daero, Jinju, 660-701, Republic of Korea E-mail: nspark@gnu.ac.kr.
authors.forename: N S
authors.initials: NS
authors.lastname: Park
authors.affiliation: Water Research Center, Korea Institute of Water and Environment, K-water, 462-1, Jeonmin-Dong, Yusung-Gu, Daejeon, 305-730, Republic of Korea.
authors.forename: S S
authors.initials: SS
authors.lastname: Kim
authors.affiliation: Water Research Center, Korea Institute of Water and Environment, K-water, 462-1, Jeonmin-Dong, Yusung-Gu, Daejeon, 305-730, Republic of Korea.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Lee
authors.affiliation: Department of Environmental Engineering, Chungnam National University, 99 Daehak-Ro, Yusung-Gu, Daejeon, 305-764, Republic of Koera.
authors.forename: C K
authors.initials: CK
authors.lastname: Wang
mesh_terms: D011232:Chemical Precipitation; D057446:Hydrodynamics; D009391:Nephelometry and Turbidimetry; D018508:Water Purification / Q000295:instrumentation*