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Experimental investigation of biogas production from feedlot cattle manure
Dissertation (MEng)--University of Pretoria, 2017.
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University of Pretoria
2017
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| _version_ | 1867613442144206848 |
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| access_status_str | Open Access |
| author2 | Kornelius, Gerrit |
| author_browse | Kornelius, Gerrit |
| author_facet | Kornelius, Gerrit |
| collection | Thesis |
| dc_rights_str_mv | © 2017 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MEng)--University of Pretoria, 2017. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/62791 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:36:12.613Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/62791 Experimental investigation of biogas production from feedlot cattle manure Kornelius, Gerrit lrosenberg@bbe.co.za Rosenberg, Logan Granville UCTD Biogas production Feedlot cattle manure Engineering, built environment and information technology theses SDG-07 SDG-07: Affordable and clean energy Engineering, built environment and information technology theses SDG-12 SDG-12: Responsible consumption and production Engineering, built environment and information technology theses SDG-13 SDG-13: Climate action Dissertation (MEng)--University of Pretoria, 2017. The demand for alternative power sources has increased rapidly over the past few years as the cost of electricity is rapidly increasing in South Africa. Biogas can be generated from biomass in an anaerobic digestion process and used to generate electricity and heat as an alternative energy source to fossil fuel generated electricity. This study is focused on the biogas generation from cattle manure. The manure was analysed for weight loss over 40 days and the energy content determined. The biogas volume produced was measured as a function of time until there was no measurable gas formation after 41 days. The biogas was analysed for methane and carbon dioxide content using a gas chromatograph. A techno-economic model was developed in terms of the design of a simple agricultural biogas plant and the economics of the plant. The same manure sample was divided into different sub-samples to be aged to 0, 4, 7, 11, 14, 21, 28, 35 and 40 days respectively and these were analysed using the biochemical methane potential test. The corresponding cumulative biogas yield was 217, 206, 199, 154, 208, 208, 245, 369 and 295 Nml/g.VS respectively. The test results showed that an average of 240 Nml/g.VS of biogas can be produced from cattle manure that is less than 40 days old, with an average methane and carbon dioxide percentage of 63 % and 31 % respectively. Within 3 to 4 days the manure samples generated 80 % of the potential final biogas volume. The design of the biogas plant was based on 7 000 cattle that would produce 58 330 kg manure per day. The average biogas yield of 240 Nm3/ton.VS was assumed, together with the average TS and VS content of 17% and 80% (as a % of TS) respectively as experimentally determined. The designed total power yield of the biogas plant was 555.3 kW for the CHP. The electrical power of 166.6 kW would be produced from a 220 kW engine and the heat energy produced was 277.7 kW. The total electrical and heat power consumption of the biogas plant was designed to be 5.0 kW and 90.7 kW respectively. The economic viability of the biogas plant was based on a proposed REFIT value of US$ 0.0926 (R1.39) per kWh for the sales of electrical energy generated from biogas. The annual capital, consumption and operational costs of the biogas plant was calculated to be US$ 33 200, US$ 16 617 and US$ 16 209 respectively. The total annual income and costs of the biogas plant was US$ 140 133 and US$ 66 026 respectively. This leads to a net annual revenue of US$ 74 107 for the biogas plant. The return on investment was calculated to be 30.6% (>13%) and is attractive from the commercial point of view and will enter the economic potential. The net present value and internal rate of return was calculated to be US$ 542 792 and 30.4% respectively with a payback time of 3.3 years. Thus the biogas plant would therefore be economically viable in South Africa. mi2025 Mechanical and Aeronautical Engineering MEng Unrestricted SDG-07: Affordable and clean energy SDG-12: Responsible consumption and production SDG-13: Climate action 2017-10-13T13:41:23Z 2017-10-13T13:41:23Z 2017-09-08 2017 Dissertation Rosenberg, LG 2017, Experimental investigation of biogas production from feedlot cattle manure, MEng Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/62791> S2017 http://hdl.handle.net/2263/62791 © 2017 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Biogas production Feedlot cattle manure Engineering, built environment and information technology theses SDG-07 SDG-07: Affordable and clean energy Engineering, built environment and information technology theses SDG-12 SDG-12: Responsible consumption and production Engineering, built environment and information technology theses SDG-13 SDG-13: Climate action Experimental investigation of biogas production from feedlot cattle manure |
| title | Experimental investigation of biogas production from feedlot cattle manure |
| title_full | Experimental investigation of biogas production from feedlot cattle manure |
| title_fullStr | Experimental investigation of biogas production from feedlot cattle manure |
| title_full_unstemmed | Experimental investigation of biogas production from feedlot cattle manure |
| title_short | Experimental investigation of biogas production from feedlot cattle manure |
| title_sort | experimental investigation of biogas production from feedlot cattle manure |
| topic | UCTD Biogas production Feedlot cattle manure Engineering, built environment and information technology theses SDG-07 SDG-07: Affordable and clean energy Engineering, built environment and information technology theses SDG-12 SDG-12: Responsible consumption and production Engineering, built environment and information technology theses SDG-13 SDG-13: Climate action |
| url | http://hdl.handle.net/2263/62791 |