The REFRESH project has evaluated the key EU waste streams having significant environmental impact. Over 290 waste streams were identified, scored and reviewed to produce a list of priority waste streams for further study. The list includes brewers’ spent grains, oil press cake and meat & dairy side-streams such as slaughter by-products and whey, as well as apple pomace, orange peel and tomato pomace.
Over 290 waste streams were identified by REFRESH researchers in a thorough review of expert knowledge, commercial literature, books, scientific papers and internet sources. These were scored and reviewed to narrow down to a list of 37 priority waste streams for further study and evaluation. The resultant list includes well-known examples like spent grains and other organic waste streams from the production of alcoholic beverages (ales, lagers, cider, wines and spirits), press cakes from vegetable oil processing, and meat & dairy side-streams such as slaughter by-products and whey protein. Fruits & vegetable waste streams, which are often considered to have lower environmental impacts, are represented by apple pomace, orange peel / juicing residues and tomato pomace.
The report provides clear focus to the REFRESH project regarding those waste streams across a range of food groups which are present in high volumes with high environmental impact. These waste streams – often used as animal feed - can be further studied and evaluated to see if these impacts can be reduced.
Sweet, N., K. Bygrave, G. Moates and K. Waldron. 2016. Valorisation appropriate waste streams. REFRESH Project Deliverable 6.1. WRAP/IFR. European Commission.