The Missouri Department of Natural Resources describes a Yard Waste/ Composting Facility business as:

A facility in the business of collecting, storing or processing organic materials, yard waste, food scraps, various compostable solid waste items, bulking agents or additives for composting.

You may need some or all of the following permits for a Yard Waste/ Composting Facility business:

Open Burning Notification https://dnr.mo.gov/air/open-burning-notification

Air

Open burning is the burning of any materials in which air contaminants are emitted directly into the air without first passing through a stack or chimney. The Missouri Department of Natural Resources does not issue permits for open burning. Prior to conducting any open burning, businesses and citizens should contact the city or county of jurisdiction for any local restrictions.

The department's Facts on Open Burning Under Missouri Regulations - PUB2047 fact sheet summarizes allowable and prohibited open burning under Missouri regulations. It does not include open burning restrictions that city or county governments may impose in addition to Missouri’s state regulations.