Organic waste, peel, cores, leftover food, coffee grounds can also be reused to make compost. It is easy to create one in your garden and the technique is well-known among gardners. You just need to placethe organic waste in heaps on the ground or in a compost bin until they make humus.
If you live in a flat, you can ask your city council or your lessor to install a collective compost bin. Otherwise, there are small worm bins (boxes in which the worms that do the composting) that you can install at home or on the balcony.