Anaerobic digestion of Brewery Spent Grains: Trace elements addition requirement

Claire Bougrier; Delphine Dognin; Cécile Laroche; Valérie Gonzalez; Dalel Benali-Raclot; Jesús Andrés Cacho Rivero

doi:10.1016/j.biortech.2017.08.211

Anaerobic digestion of Brewery Spent Grains: Trace elements addition requirement

Bioresour Technol. 2018 Jan:247:1193-1196. doi: 10.1016/j.biortech.2017.08.211. Epub 2017 Sep 2.

Authors

Claire Bougrier¹, Delphine Dognin², Cécile Laroche², Valérie Gonzalez², Dalel Benali-Raclot², Jesús Andrés Cacho Rivero²

Affiliations

¹ Veolia Recherche & Innovation, 291 Avenue Dreyfous Ducas, Limay 78520, France. Electronic address: claire.bougrier@veolia.com.
² Veolia Recherche & Innovation, 291 Avenue Dreyfous Ducas, Limay 78520, France.

PMID: 28918347
DOI: 10.1016/j.biortech.2017.08.211

Abstract

The current study evaluates and compares the stability of anaerobic digestion of Brewery Spent Grains (BSG) with and without addition of nutrients. Based on the composition of the BSG two levels of nutrients addition were defined. Control reactor, without addition of nutrients, showed signs of instability after 3months of operation and collapsed. On the contrary, supplemented reactors led to a COD removal rate of 60% and a methane production of 280NLCH₄.kg^-1 VS_added. According to these results, it was possible to define an additive solution adapted to BSG degradation.

Keywords: Anaerobic digestion; Brewer’s spent grains; Inhibition; Trace elements.

MeSH terms

Bioreactors*
Methane
Trace Elements*

Substances

Trace Elements
Methane