Keep your food scraps in the freezer in a plastic bag or container. When it's full, empty the bag into the "organics collection" bin on the ground floor. Throw the plastic bag into the regular trash bin next to it. Or bring the same bag bag upstairs to reuse for food scraps.
IF we can make this work, perhaps we can persuade Stellar to put a brown bin on each floor to make things even easier. But we have to show that we'll CLOSE THE LID properly.