Publications in International Journals / Series (Article (International))

Biochemical methane potential of brewery by-products

  • Clean Technologies and Environmental Policy, 20(2), 435-440, 2018

Publisher: Springer Verlag

Abstract

Beer production generates by-products with high energy potential, namely trub (Tr, dead yeast from the fermentation) and spent grain (SG, smashed barley grains). This work investigates the biochemical methane potential (BMP, volume of methane produced per volatile solids of substrate—L kg−1) of these by-products, performing batch anaerobic biodegradability assays. Single substrates were evaluated as well as a mixture of Tr:SG (1:9, weight), in order to simulate the relative proportion generated in breweries. Tr reached the highest BMP [(515 ± 4) L kg−1], still, considering the total amount of ...

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