Process design for utilizing spent grain as a potential energy source for craft breweries
Abstract: Craft breweries in Sweden are steadily increasing and they face a major challenge with the byproduct that is generated in the brewing process. The by-product is called wet spent grain (WSG) and the biggest challenge lays in its’ high moisture content which will make it spoil within a few days. Craft breweries are being conscious of sustainable practices when producing beer and the aim of this thesis is hence to design a viable process to better utilize the WSG or turn it into a useful product. The research problem of this study is to explore ways to utilize the wet spent grain in a sustainable manner. The research has been conducted through a literature study, focused on gaining relevant knowledge on the chemical composition of WSG. Based on the acquired knowledge a suitable solution was explored and further research within this field was conducted. Based on the conducted research, this study confirms one major finding. Wet spent grain (WSG) can be used as a potential energy source for craft breweries. The study, however, concludes that the researched solution for this specific brewery is not financially viable from an investment point of view at this time.
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