The Journal of
the Korean Society on Water Environment

The Journal of
the Korean Society on Water Environment

Bimonthly
  • ISSN : 2289-0971 (Print)
  • ISSN : 2289-098X (Online)
  • KCI Accredited Journal

Editorial Office

Title Evaluation of Hydraulic Characteristics Influenced by Different Deflector Baffles in the Sedimentation Basin with Inclined Plate Settler
Authors 유명진 ( Myong Jin Yu ) ; 김현철 ( Hyun Chul Kim ) ; 류성호 ( Seong Ho Ryu )
Page pp.40-45
ISSN 2289-0971
Keywords Inclined plate settler; Deflector baffle; Tracer test; Morill index; Modal index; Short-circuiting index
Abstract Sedimentation is one of the most common and important units in conventional water treatment plant. Structure such as various baffle walls and inclined plate settler may be obstacles to the horizontal flow when it is poorly designed. Therefore, the effects of these structures on characteristics of hydraulic flow must be evaluated to improve the settling efficiency of the floc. The hydraulic characteristic of the two sedimentations at Y water treatment plant (YWTP), which have different deflector baffles inside the settling basin, were investigated by tracer (fluoride) test. The inclined plate settler installed inside settling basin caused an undesirable impact on horizontal flow and produced dead zone. Solid baffle wall under the plate settler could help to minimize the formation of density currents and flow short circuiting. NalE used as a tracer was recovered more than 90% at investigated all basins. Morill index (t_(90)/t_10)), Modal index (t_p/T-HRT) and short-circuiting index ([M-HRT-t_p]/M-HRT) were determined from tracer test results performed at YWTP. Those indices ranged 2.95~3.02, 0.40~0.53 and 0.32~0.46, respectively.