Table 1.
Spent grain | Waste beer | Conditioning bottom | Filter waste | Trub | |
---|---|---|---|---|---|
Edibility | Inedible | Edible | Edible | Inedible | Inedible |
State | N/A | Eatable | Eatable | N/A | N/A |
Origin | Plant based | Plant based | Principally microorganisms* | Microorganisms* | Plant based |
Complexity | Single product | Single product | Single product | Mixed product | Mixed product |
Animal-product presence | N/A | N/A | N/A | Not in contact with animal-based products | Not in contact with animal-based products |
Treatment | N/A | Processed | Unprocessed | N/A | N/A |
Packaging | N/A | Separable from packaging | Unpackaged | N/A | N/A |
Packaging biodegradability | N/A | N/A | N/A | N/A | N/A |
Stage of the supply chain | Non-catering waste | Non-catering waste | Non-catering waste | Non-catering waste | Non-catering waste |
Current treatment | Animal feeding | 95 % animal feeding + 5 % sewage | Animal feeding | 50 % compost + 50 % sewage | Animal feeding |
Suggested alternative | Animal feeding | Redistribution for human consumption | Animal feeding | Anaerobic digestion | Animal feeding |
Further possibilities | Production of foodstuff | N/A | Production of foodstuff | Industrial uses | Production of foodstuff |
Quantity | ≈70,000 t/year | 14,000 t/year | 7000 t/year | 1200 t/year | ≈700 t/year |
The suggested alternative is based on the FWMDT presented in the Figs. 4–7. Possible alternative options from the food waste hierarchy are suggested as further possibilities when they are better than the suggested alternative. The particular type of diatomaceous earth in filter waste was not identified and thus it was considered to be not suitable for animal feeding. N/A means ‘not applicable’ or that the information is not necessary. * The ‘microorganisms’ indicator, from the origin stage, was considered as plant based