The feasibility of the sustainable energy supply from bio wastes for a small scale brewery – A case study

Anaerobic treatment of brewery wastes

“…Spent grains or brewers' spent grains (BSG) is the most abundant brewing by-product, corresponding to about 85% of total by-products generated (Mussatto et al, 2006). It has a C/N ratio of less than 25, and hence is amenable to anaerobic digestion, either as a sole substrate or in co-digestion with other readily biodegradable organic compounds (Kuzmanova & Akunna, 2013;Sturm, Butcher, Wang, Huang, & Roskilly, 2012;Thomas & Rahman, 2006). It has a C/N ratio of less than 25, and hence is amenable to anaerobic digestion, either as a sole substrate or in co-digestion with other readily biodegradable organic compounds (Kuzmanova & Akunna, 2013;Sturm, Butcher, Wang, Huang, & Roskilly, 2012;Thomas & Rahman, 2006).…”

Adsorption thermal energy storage for cogeneration in industrial batch processes: Experiment, dynamic modeling and system analysis

“…In particular, small and medium sized breweries have large potential to improve their energy efficiency [12]. Sturm et al [13] show that cogeneration can be profitably applied to meet the brewing process energy demand. Still, high investment costs can be an obstacle to apply cogeneration in practice.…”

Implementation of a cogeneration plant for a food processing facility. A case study

“…To evaluate the economic profitability of the investment, the trends of the main economic indexes were analysed. The obtained results are summarized as follows: 21 • Greater cost to achieve better performances (e.g. increasing the pressure ratio) is not justified by the hypothesised market conditions.…”

“…Net Present Value [4], [6], [7], [11], [12], [13], [14], [15], [16], [17], [18] Internal Rate of Return [4], [15], [16], [17] Pay Back Period [3], [4], [7], [8], [9], [12], [14], [15], [16], [17], [18], [19], [20], [21] Profitability Index [17] Return on Investment [4] …”

“…Moreover, Sturm et al [21] studied the application of a CHP in small scale brewery in UK. They considered different system configurations and concluded that the most effective one, also in relation to government support, is the combination of either, boiler or CHP with an absorption chiller.…”