What do we see?
The graph below shows some results of the sorting analysis regarding the organic-biological fraction in household waste. During the period 2019-2021, about 48 kg per capita of kitchen waste was recovered, of which about 45 kg was compostable. Results from previous analyses show much variation; however, the majority of kitchen waste in household waste is compostable.
In more detail, we see that in the 2019-2021 measurement, almost half of kitchen waste is unavoidable: this concerns non-compostable items such as bones, fish bones or tea bags and compostable items such as peels and egg shells. The other fractions amount to food waste: if we extrapolate the figures to Flanders, this amounts to about 175,539 tonnes of food thrown away every year.
What’s the aim?
For kitchen waste, nature has in principle provided End-of-Life options, however, this does not mean that it is automatically processed in the ideal way. When this type of waste ends up in residual waste, only energetic valorisation takes place. The aim is to put it into composting or fermentation as much as possible, so that the nutrients can again be used for plant growth; use as animal feed is also a good option. The avoidable fraction in residual waste is equivalent to food loss: here, in fact, all the inputs used to produce it are also lost. Kitchen waste should be limited mainly to the unavoidable fraction and valorised outside the residual waste stream as much as possible.
