Considering the limited space for more bins and the amount of heavy transport in Oslo the choice fell on optical sorting. Using Optibag’s system the municipality could keep the same bins and the same vehicles could be used while the transports could be kept at a minimum.
The two sorting plants owned by EGE (Energy Recycling Administration) have three fractions: food waste, plastic and other materials. Food waste becomes biogas and biofertilizer, while plastic is recycled and the rest fraction is energy recycled. The two plants use pre-treatment sifts to remove any non-bagged materials aswell as a wind sift to refine the plastic fraction after sorting. In 2017 46.4% of all food waste in Oslo was sorted in the green bags, which is the best result in Scandinavia.