Keep Lomi fresh with Lomi charcoal filter refills Our Lomi Filters use activated carbon to trap moist air, remove gases from circulation, and reduce any unpleasant smells from your food waste. Your Lomi comes with your first set of activated charcoal - fill up your filter housing and Lomi does a great job of preventing odours while Lomi breaks down your waste To keep your Lomi running smoothly, your Lomi Filters should be replaced every 3 months.