Numerical simulation of a horizontal sedimentation tank consideringsludge recirculation
Wei Zhang , Zhihong Zou , Jun Sui
DOI:
Received January 25, 2010,Revised April 08, 2010, Accepted , Available online
Volume 22,2010,Pages 1534-1538
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Most research conducted on the concentration distribution of sediment in the sedimentation tank does not consider the role of the
suction dredge. To analyze concentration distribution more accurately, a suspended sediment transportation model was constructed and
the velocity field in the sedimentation tank was determined based on the influence of the suction dredge. An application model was then
used to analyze the concentration distribution in the sedimentation tank when the suction dredge was fixed, with results showing that
distribution was in accordance with theoretical analysis. The simulated value of the outlet concentration was similar to the experimental
value, and the trends of the isoconcentration distribution curves, as well as the vertical distribution curves of the five monitoring sections
acquired through simulations, were almost the same as curves acquired through experimentation. The di erences between the simulated
values and the experimental values were significant.
