Given the Grunge Life™ requires surrendering bourgeois luxuries like garbage disposals, how exactly should one dispose of food scraps?
While you might be tempted to simply throw them away, don't! This will inevitably lead to having to empty the garbage, and worse, you will eventually need to purchase replacement garbage bags.
A more savvy and sustainable solution: flush it. Your toilet already enjoys disposing of the food you've eaten; it is more than suited to handling the food you haven't.