Fuel production from a brewery residue

Mukuna Tshiteya

Energy, 1985, vol. 10, issue 12, 1299-1306

Abstract: A laboratory feasibility study was undertaken to evaluate the bioconversion of draff, a residue from the industrial conversion of malt in brewery, into a valuable fuel. Reaction rates up to 0.194 m3 gas/m3 digester/day and an overall yield of 35 m3 gas/dry ton substrate were observed at ambient temperature. Orsat analysis showed the biogas composition to be (in %): CH4, 61; CO2, 38; O2, 0.40; H2S, 0.20. Its energy content is 24.5 MJ/m3. The latent period was shortened to 24 hrs by seeding the reactor with active microorganisms from a well-operating anaerobic digester charged with horse's manure. A conversion-factor chart is constructed which compares the product biogas to other common fuels. Experimental tests were also performed on the same bench-scale equipment to evaluate the bioconversion of bovine and horse manures under similar conditions. The draff is shown to be a valuable potential fuel source.

Date: 1985
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:10:y:1985:i:12:p:1299-1306

DOI: 10.1016/0360-5442(85)90141-0

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