Masters Theses

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 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.

Advisor(s)

Jennett, J. Charles

Committee Member(s)

Grigoropoulos, Sotirios G.
Carmichael, Ronald L., 1921-2006

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Civil Engineering

Sponsor(s)

United States. Office of Water Resources Research
United States. Environmental Protection Agency

Publisher

University of Missouri--Rolla

Publication Date

1971

Pagination

vii, pages

Rights

© 1971 Daniel James Harris, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Sewage sludge -- DryingSewage sludge digestionSewage -- Purification -- Activated sludge process

Thesis Number

T 2681

Print OCLC #

6038777

Electronic OCLC #

880379569

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