Chemical Sludge Dewatering on Sand Beds
- 1 January 1975
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of the Environmental Engineering Division
- Vol. 101 (1) , 1-14
- https://doi.org/10.1061/jeegav.0000290
Abstract
In this study the draining and drying rates of chemical sludges applied to sand beds were related to several sludge characteristics. It was found that the time to drain was related to the sludge specific resistance, applied depth, and solids concentration. Air drying occurred in two distinct phases. The initial or slow drying phase was governed by the sludge cake depth and drained solids concentration while the rapid drying rate was found to approximate the free surface water evaporation rate. Sludges with a coefficient of compressibility less than 0.7 were found to penetrate into the sand bed.Keywords
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