Influence of storage on methane yields of separated pig slurry solids

Autor(en): Hothan, Andreas
Brauckmann, Hans-Joerg
Broll, Gabriele 
Stichwörter: Agricultural Engineering; Agriculture; Anaerobically storage, ensilage; Biogas; Biotechnology & Applied Microbiology; Energy & Fuels; Pig slurry; Solid-liquidseparation; STRAW
Erscheinungsdatum: 2013
Herausgeber: PERGAMON-ELSEVIER SCIENCE LTD
Journal: BIOMASS & BIOENERGY
Volumen: 52
Startseite: 166
Seitenende: 172
Zusammenfassung: 
Biogas production from separated pig slurry solids is more profitable than using untreated raw slurry because there is a higher CH4 potential per unit fresh matter. However, logistics needs to be optimized. A stable storage without losing the high biogas potential could enable deliveries on demand. Self-heating and CH4 yields of aerobically and anaerobically stored pig slurry solids were analysed and compared. The aerobic storages had run times of 33 and 44 days. Anaerobic storage took 7, 23 and 35 weeks. Anaerobically stored solids show no self-heating and produce CH4 yields of up to 188 L kg(-1) ODM. This is over twice as much as the aerobically stored solids produce and about the same CH4 yield produced by freshly separated solids. Additionally, a mass loss occurs under aerobic storage that reduces the methane yield of the original material too. (C) 2013 Elsevier Ltd. All rights reserved.
ISSN: 09619534
DOI: 10.1016/j.biombioe.2013.03.013

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