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Addis Ababa University Libraries Electronic Thesis and Dissertations: AAU-ETD! >
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Thesis - Anaesthesiology >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/123456789/106
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| Title: | EVALUATION OF ECONOMIC AND TECHNICAL FEASIBILITY OF BIOGAS PRODUCTION FROM POULTRY MANURE IN ELFORA AGRO INDUSTRY DEBRE ZEIT |
| Authors: | EBRAHIM, ALI |
| Date Added: | 7-Sep-2007 |
| Abstract: | The economic and technical feasibility of poultry manure to methane conversion
using anaerobic digestion and electricity generation was studied in ELFORA poultry
farm in Debre Zeit, Ethiopia using three sets of data; chemical analysis of wet
manure, annual on farm wet poultry manure production and annual electric
consumption of the poultry farm.
Total solids (% wet), volatile solids (% TS) and PH were analyzed as reported in
Standard Methods ASTM and AOAC publications. Phosphorus was analyzed using
Hatch Analysis system. Ultimate analysis of carbon, nitrogen, hydrogen, oxygen and
sulfur were done using elemental analysis method. The result shows low carbon
nitrogen ratio of the manure indicating that wet poultry manure easily ferments in
anaerobic digestion. The estimated daily volume of wet manure generated on farm is
27,397kg on average. The amount of nitrogen and phosphorous in the slurry was
estimated to be 97.8 kg and 96.94 kg respectively from 4328 kg of dry matter which
constitutes a good fertilizer potential .
The estimated methane production with loading rate of 3.03 kg VS per meter cube is
655meter cube per day for complete mix digester, 807meter cube with loading rate of
4.8kg VS per meter cube for plug flow digester and 605 meter cube with loading rate
of 0.39kgVS/m3 for covered lagoon digester was estimated. Poultry manure with high
content of VS and nitrogen can have high methane yield on site, which could be used
to fuel an engine/ generator of 86kw, 94kw and 115kw for complete mix, plug flow
and covered lagoon digesters respectively.
The carbon dioxide equivalents of the maximum methane generated on-farm were
calculated to be 3.739kt per year. This yield was found to be equal to the carbon
dioxide emitted from the distraction of 1,402 acres forestland. The calculated annual
energy equivalent of the yield is 12.37-tera joule with a calorific value of 2.95 tera
calorie and 295 Toe. Economics of anaerobic digestion for all three types of digesters
show positive NPV indicating that on farm anaerobic digestion is feasible. |
| Description: | A Thesis Submitted to the School of Graduate Studies of Addis
Ababa University in Partial Fulfillment of the Requirements for the Degree
of Master of Science in Environmental Science |
| URI: | http://hdl.handle.net/123456789/106 |
| Appears in: | Thesis - Environmental Sciences
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