Fig. 2.

Steps involved in the processing of food waste by the four food waste disposal technologies. Only major material flows are shown: minor inputs (e.g. water, corn in the case of wet feed) and evaporation are not included for the sake of clarity. Outputs are indicated by arrows and substituted products are shown in the boxes on the right-hand side. Mineral fertilizer substitution rates of digestate and compost are listed in section 2.1.3 and Appendix 3, respectively.