Record Display for the EPA National Library Catalog

RECORD NUMBER: 34 OF 104

OLS Field Name OLS Field Data
Main Title Environmental Factors in Design and Operation of Waste Water Sludge Drying Beds.
Author Jennet, J. Charles ; Harri, Daniel J. ;
CORP Author Missouri Water Resources Research Center, Rolla.
Year Published 1971
Report Number OWRR-A-042-MO; 01337,; A-042-MO(1)
Stock Number PB-204 599
Additional Subjects ( Sewage treatment ; Sludge disposal) ; ( Sludge disposal ; Dewatering) ; ( Activated sludge process ; Sludge drying) ; Anaerobic processes ; Moisture content ; Humidity ; Evaporation ; Waste disposal ; Theses ; Mathematical models ; Solid waste disposal
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB-204 599 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 108p
Abstract
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 T (the difference between dry and wet bulb temperature) and 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 T. (Author)