Going well beyond regulatory requirements, these combined technologies substantially limit the impact from conventional food waste disposal methods, such as landfills, while contributing to even more sustainable and efficient operations. For example, one way the company treats and manages left-over food onboard is with its over 630 biodigesters installed fleetwide as of the end of 2024. These "metallic stomachs" use natural bacteria to organically break down and liquify uneaten food to a tiny fraction of its original volume. Carnival Corporation also relies on over 90 dehydrators and dryers installed across the fleet to remove excess water from hard-to-break-down food items, such as fruit rinds, shrinking the remaining hard waste volume by approximately 90%. The dried material can then be ground down into an organic pulp for possible use as organic mulch and compost or offloaded.