City Staff, with representatives from SEEDS, Grand Traverse County, and Leelanau County, toured an Industrial Composting Facility in Burton, Michigan this week!
In industrial composting, three primary techniques are employed: windrow, in-vessel, and aerated static pile composting. Windrow composting involves an open-air process where composting materials are arranged in long piles known as "windrows," approximately 5 feet high. Regular turning ensures proper aeration, facilitating the rotation and breakdown of all composting materials. The City conducts this method at it's Keystone Facility.
In-vessel composting occurs within enclosed environments, offering efficient waste processing while occupying less space than the windrow method. This method accommodates various organic waste types, with mechanical turning or mixing ensuring adequate aeration to promote bacterial activity. Notably, the City is set to launch a pilot program for in-vessel food and waste composting in 2024 with the assistance of a USDA grant.
Aerated static pile composting is a rapid process, typically yielding compost within three to six months. Ideal for relatively homogeneous mixes of organic waste, this technique suits larger quantity generators, including government agencies and commercial food operations, dealing with compostable municipal solid waste such as food scraps, paper products, and bioplastics. The team was able to tour and learn more about aerated static pile composting!
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