Effect of geometric and process variables on the performance of inclined plate settlers in treating aquacultural waste

Inclined plate settlers are used in treating wastewater due to their low space requirement and high removal rates. The prediction of sedimentation efficiency of these settlers is essential for their performance evaluation. In the present study, the technique of dimensional analysis was applied to pr...

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Bibliographic Details
Published in:Water research (Oxford) 2007-03, Vol.41 (5), p.993-1000
Main Authors: Sarkar, Sudipto, Kamilya, Dibyendu, Mal, B.C.
Format: Article
Language:English
Subjects:
agricultural wastes
Applied sciences
Aquaculture
coastal water
Dimensional
dimensional analysis
dimensions
Dynamic
dynamic models
effluents
equations
Exact sciences and technology
extraction
filters
fluid mechanics
Geometric
Inclined plate
inclined plate settlers
mathematical models
Models, Theoretical
Other industrial wastes. Sewage sludge
Pollution
prediction
probability analysis
sedimentation tanks
sediments
separation
separators
Settlers
Sewage
simulation models
solids
Viscosity
Waste Disposal, Fluid - instrumentation
Waste Disposal, Fluid - methods
Wastes
Wastewater
wastewater treatment
Water Purification - methods
Water treatment and pollution
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Summary:Inclined plate settlers are used in treating wastewater due to their low space requirement and high removal rates. The prediction of sedimentation efficiency of these settlers is essential for their performance evaluation. In the present study, the technique of dimensional analysis was applied to predict the sedimentation efficiency of these inclined plate settlers. The effect of various geometric parameters namely, distance between plates ( w p), plate angle ( α) , length of plate ( l p) , plate roughness ( ε p) , number of plates ( n p) and particle diameter ( d s) on the dynamic conditions, influencing the sedimentation process was studied. From the study it was established that neither the Reynolds criterion nor the Froude criterion was singularly valid to simulate the sedimentation efficiency ( E) for different values of w p and flow velocity ( v f). Considering the prevalent scale effect, simulation equations were developed to predict E at different dynamic conditions. The optimum dynamic condition producing the maximum E is also discussed.
ISSN:0043-1354
1879-2448
DOI:10.1016/j.watres.2006.12.015