I copy this post from Ecowordly, because I think all food processing industries should be investigating the potential of anaerobic digestion to convert waste into biogas to supplement their energy supply. It makes sense in lots of ways!
SAB Miller, South African grown, second largest brewer in the world has introduced anaerobic digestion to treat the waste leaving its Alrode Brewery in Gauteng, South Africa. Anaerobic fermentation of organic material produces methane, which is used to reduce the consumption of fossil fuel based energy.
Copper brewhouse in a Trappist brewery
Brewery Waste & Biogas
According to the waste management expert, Greg Scott , it would appear that, in the brewery the waste is a collection of unavoidable losses of carbohydrate and protein rich materials, which would otherwise be sold as beer or byproduct and the large quantities of water used to maintain a hygienic operation. Continue reading