"The dewatering characteristics of anaerobically digested primary and activated sludge were investigated under eight selected combinations of laboratory controlled air temperature and relative humidity using three open, drained model beds, as well as a closed, drained and an open, nondrained bed. The evaporation rate from a free water surface was also determined. Moisture content, drainage, evaporative weight loss, and sludge surface recession were measured and recorded periodically throughout the two week period of each of the eight experiments. Relationships were shown to exist between sludge moisture content, evaporation rate from a free water surface, and the parameters 6T (the difference between dry and wet bulb temperature) and A H (the difference between saturation and absolute humidity). It was found that moisture gradients developed within the dewatering sludge which generally increased with time and ΔT. An inverse relationship was noted between drainage and evaporation which was influenced by dry bulb temperature because of its effect upon water viscosity"--Abstract, page ii.
Jennett, J. Charles
Grigoropoulos, Sotirios G.
Carmichael, Ronald L., 1921-2006
Civil, Architectural and Environmental Engineering
M.S. in Civil Engineering
United States. Office of Water Resources Research
United States. Environmental Protection Agency
University of Missouri--Rolla
© 1971 Daniel James Harris, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Sewage sludge -- Drying
Sewage sludge digestion
Sewage -- Purification -- Activated sludge process
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Harris, Daniel James, "Digested sludge dewatering on drying beds under controlled environmental conditions" (1971). Masters Theses. 5105.