Anaerobic fermentation of beef cattle manure : final report /
The research to convert livestock manure and crop residues into methane and a high protein feed ingredient by thermophilic anaerobic fermentation are summarized. The major biological and operational factors involved in methanogenesis were discussed, and a kinetic model that describes the fermentatio...
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| Main Authors: | , , |
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| Corporate Authors: | , , |
| Format: | Government Document Book |
| Language: | English |
| Published: |
Golden, Colorado :
Solar Energy Research Institute, A Division of Midwest Research Institute,
1981.
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| Series: | SERI/TR ;
98372-1. |
| Subjects: |
| Summary: | The research to convert livestock manure and crop residues into methane and a high protein feed ingredient by thermophilic anaerobic fermentation are summarized. The major biological and operational factors involved in methanogenesis were discussed, and a kinetic model that describes the fermentation process was presented. Substrate biodegradability, fermentation temperature, and influent substrate concentration were shown to have significant effects on CH/sub 4/ production rate. The kinetic model predicted methane production rates of existing pilot and full-scale fermentation systems to within 15%. The highest methane production rate achieved by the fermenter was 4.7 L CH/sub 4//L fermenter day. This is the highest rate reported in the literature and about 4 times higher than other pilot or full-scale systems fermenting livestock manures. Assessment of the energy requirements for anaerobic fermentation systems showed that the major energy requirement for a thermophilic system was for maintaining the fermenter temperature. The next major energy consumption was due to the mixing of the influent slurry and fermenter liquor. An approach to optimizing anaerobic fermenter designs by selecting design criteria that maximize the net energy production per unit cost was presented. Based on the results, we believe that the economics of anaerobic fermentation is sufficiently favorable for farm-scale demonstration of this technology. |
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| Item Description: | "January 1981." "Prepared under Subcontract No. DB-9-8372-1 for the Solar Research Institute." "Prepared for the U.S. Department of Energy, Contract No. EG-77-C-01-4042." "SERI Technical Monitor: Dan Jantzen." "Prepared by the Roman L. Hruska U.S. Meat Animal Research Center, U.S. Department of Agriculture"--cover. |
| Physical Description: | vi, 66 pages : illustrations, figures, tables ; 28 cm Also available via internet in .pdf format. Adobe Acrobat Reader required. |
| Bibliography: | Includes bibliographical references (pages 60-66). |
