How much gas can we get from grass?

Autor: Abdul-Sattar Nizami, Angela Orozco, B. Dieterich, Jerry D. Murphy, Elaine Groom
Rok vydání: 2012
Předmět:
Zdroj: Nizami, A-S, Orozco, A, Groom, E, Dieterich, B & Murphy, J 2012, ' How much gas can we get from grass? ' Applied Energy, vol 92, pp. 783-790 ., 10.1016/j.apenergy.2011.08.033
ISSN: 0306-2619
DOI: 10.1016/j.apenergy.2011.08.033
Popis: Grass biomethane has been shown to be a sustainable gaseous transport biofuel, with a good energy balance, and significant potential for economic viability. Of issue for the designer is the variation in characteristics of the grass depending on location of source, time of cut and species. Further confusion arises from the biomethane potential tests (BMP) which have a tendency to give varying results. This paper has dual ambitions. One of these is to highlight the various results for biomethane potential that may be obtained from the same grass silage. The results indicated that methane potential from the same grass silage varied from 350 to 493 L CH 4 kg −1 VS added for three different BMP procedures. The second ambition is to attempt to compare two distinct digestion systems again using the same grass: a two stage continuously stirred tank reactor (CSTR); and a sequentially fed leach bed reactor connected to an upflow anaerobic sludge blanket (SLBR–UASB). The two engineered systems were designed, fabricated, commissioned and operated at small pilot scale until stable optimal operating conditions were reached. The CSTR system achieved 451 L CH 4 kg −1 VS added over a 50 day retention period. The SLBR–UASB achieved 341 L CH 4 kg −1 VS added at a 30 day retention time.
Databáze: OpenAIRE
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