Low Temperature Activated Sludge Setting

by Sherwood C. Reed,
R. Sage Murphy,


Serial Information: Journal of the Sanitary Engineering Division, 1969, Vol. 95, Issue 4, Pg. 747-770


Document Type: Journal Paper

Discussion: Pardus Ivo (See full record)
Closure: (See full record)

Abstract: The investigation considered the settling characteristics of activated sludge at low temperature, and in particular studied the influence of temperature on zone settling velocity. A series of settling tests were observed with particle concentration and temperature as the controlled variables. Based on this experimental data, an equation defining settling velocity in terms of concentration, fluid temperature, and organic loading was developed. Although empirical in nature the equation provides a rational basis for the determination of temperature influence and should have special value for cold regions designs. It was possible to describe the results of other investigations with this equation.

Subject Headings: Temperature effects | Activated sludge | Settling velocity | Fluid velocity | Particles | Concentrated loads | Organic loads | Thermal loads

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