Large-scale composting

Large-scale composting operation

Large-scale composting programs are becoming more common, but are not available to residents and businesses in all areas of the state. These programs collect compostable materials on a larger scale like residential curbside pick-up, drop-off locations, or at larger facilities like office buildings or event venues, museums and restaurants.

A commercial composting facility is substantially different from either a worm compost bin or a backyard compost pile. The large scale facilities closely monitor the compost and have practices in place to ensure conditions are ideal for composting. These facilities ensure conditions are ideal for composting by monitoring temperatures, building compost piles with appropriate carbon to nitrogen ratio, and creating appropriate moisture and airflow levels in the piles. Waste entering the facility and finished compost are tested so finished compost is safe and the environment is protected.  

Because of those controls, these programs take a broader variety of materials, including all types of food scraps (dairy, meat, fat and oils in addition to fruits and vegetables) and non-recyclable paper (paper towels, paper cups, food soiled paper plates/cups/containers). This practice is often called composting, and sometimes is called food waste recycling or organics recycling. The MPCA advises residents not to place items such as meat, dairy and non-recyclable paper in their backyard compost because backyard compost piles are typically not managed with the same level of scrutiny and care as the compost at these facilities. 

For more information on commercial composting facilities, rules and regulations visit our commercial compost webpage.