Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7475780 | Journal of Environmental Management | 2018 | 7 Pages |
Abstract
The brewery industry generates a large amount of by-products and notably Brewer's Spent Grain (BSG) which seems an attractive substrate for anaerobic digestion. Nevertheless, previous studies have shown risk of inhibition in the mono-digestion of lignocellulosic substrates. One way to stabilize the reaction is the addition of trace elements. The current study evaluates and compares the stability of BSG anaerobic mono-digestion with and without addition of trace elements for several BSG samples. Based on the average composition of the BSG, two levels of nutrients addition were defined and tested on 4 different BSG samples. Control reactors, without addition of nutrients, showed signs of instability after 3 months or less of operation, with a decrease in performance and even collapse. On the contrary, supplemented reactors led to a COD removal rate of 60-65% and a methane production ranged between 220 and 350 NL CH4.kgâ1 VSadded, depending on the sample. According to these results, guidelines for nutrients solution addition adapted to BSG degradation were defined.
Related Topics
Physical Sciences and Engineering
Energy
Renewable Energy, Sustainability and the Environment
Authors
Claire Bougrier, Delphine Dognin, Cécile Laroche, Jesús Andrés Cacho Rivero,