Masters Theses

Abstract

"The feasibility of utilizing the thermal energy from an electric power plant to operate an activated sludge process at elevated temperatures (above 40°C) was assessed.

The practicality of using this heat was determined from a heat transfer analysis and the operation of the activated sludge process was evaluated from laboratory studies of a batch process treating domestic and synthetic sewage.

The tank size for a thermophilic activated sludge chamber could be reduced by 40 to 50% as compared to ambient temperatures. For thermophilic processes a temperature of 55°C is recommended because the transition phase between mesophiles and thermophiles is around 45°C and maximum growth rate occurs at 55°C. The effluent suspended solids after an hour and a half of settling was about 25 mg/1.

Only about 10% of the thermal energy in the power plant cooling water is utilizable for increasing sewage temperatures to the thermophilic range. The additional boiler steam output required would be 7 to 33% for sewage flow rates of 20 to 100 MGD.

The basic proposal described above was found to be technically feasible but the economic analysis was considered to be beyond the scope of this research. It was felt that such a proposal has application but additional research is needed"--Abstract, page ii.

Advisor(s)

Wixson, Bobby G.

Committee Member(s)

Modesitt, Donald E.
Howell, Ronald H. (Ronald Hunter), 1935-

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Civil Engineering

Sponsor(s)

United States. Federal Water Pollution Control Administration

Publisher

University of Missouri--Rolla

Publication Date

1973

Pagination

ix, 119 pages

Note about bibliography

Includes bibliographical references (pages 103-110).

Rights

© 1973 Peter J. Dawson, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Library of Congress Subject Headings

Sewage -- Purification -- Activated sludge process
Sewage sludge -- Effect of high temperatures on
Thermophilic microorganisms

Thesis Number

T 2852

Print OCLC #

6028730

Electronic OCLC #

911512690

Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

http://laurel.lso.missouri.edu/record=b1066727~S5

Comments

During the time period in which this study was performed, the author was on a Professional Trainee Appointment under grant IP2-WP-278-0l, T-900121 from the Water Quality Office, United States Environmental Protection Agency.

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