The best way to compost in a small space or indoors is using worms to help with the decomposition process (known as vermicomposting). This is a clean and odor-free way to compost and can be done on a small scale. You will need quite a few worms to start the process. Even though with this method you will add mostly green food (kitchen
scraps) the brown food is also necessary (the carbon is needed). A good source of carbon for an indoor composting bin is shredded newspaper – just remember not to use the glossy pages.

You can try a traditional hot compost bin on your balcony taking special care and consideration to turn the pile frequently to eliminate odors. You do not want to alienate
your neighbors. You will still need a supply of brown food to use in your compost bin, contact your local gardening center or municipality on the availability of getting this resource for free. Chances are they will be happy to supply you with a bag. You can
create your balcony compost bin out of a garbage can with holes drilled through the sides to help with air circulation.