More than 30 municipalities around New England can be sure their wastewater biosolids are put to good use and not just filling up expensive landfills.
They send their biosolids to the Hawk Ridge Compost Facility in Unity, Maine. There the biosolids are mixed with wood chips and other bulking agents, composted, and turned into useful products for landscapers, contractors, gardeners and others.
Owned by Casella Organics, the 15-acre facility uses an in-vessel tunnel composting system developed by Gicom Composting Systems of the Netherlands. The technology was developed to provide a climate-controlled environment for growing mushrooms. Since then it has been adapted to composting and
