Thermal Energy Interchange During Anaerobic Methane Fermentation of Waste Organic Substrates

Author:

Pohland F. G.1

Affiliation:

1. School of Civil Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332

Abstract

An experimental calorimeter-type anaerobic fermentation system was developed to evaluate the extent of thermal energy interchange during anaerobic digestion of waste organic solids at 36 C. Results over a period of 184 days indicated that the energy released during conversion of the waste substrate was utilized primarily for the production of CH 4 and that any excess released as heat during normal digestion was not sufficient to overcome heat losses from the system. The more exothermic response observed during retarded digestion was attributed to the accumulation of volatile acids and associated reduction in gas yields. After combustion of the CH 4 produced during digestion, between 2,370 and 3,950 kcal per lb of volatile solids converted per day was available for heating the process and maintaining optimal temperature conditions.

Publisher

American Society for Microbiology

Subject

General Pharmacology, Toxicology and Pharmaceutics,General Immunology and Microbiology,General Biochemistry, Genetics and Molecular Biology,General Medicine

Reference15 articles.

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3. Camp T. R. 1963. Water and its impurities p. 223-286. Reinhold Publishing Corp. New York.

4. Heat and energy relations in the digestion of sewage solids. I. The fuel value of sewage solids;Fair G. M.;Sewage Works J.,1932

5. Heat and energy relations in the digestion of sewage solids. II. Mathematical formulation of the course of digestion;Fair G. M.;Sewage Works J.,1932

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