BI business develops composting system

Green Mountain Technologies of Bainbridge Island has helped a Shelton business with technology and facility design for a new food waste composting system at its mulch production facility.

Brady Trucking’s composting facility uses an advanced “covered aerated static pile” process, a news release says.

Co-owner Evan Brady said: “For years we’ve been purchasing compost in bulk to have availability for our mulch clients who also need compost. Now we’re able to efficiently make our own compost while keeping food waste out of landfills.”

The goal of a new state is to divert food waste from landfills. The new composting facility is permitted to process 50,000 tons per year. Up to 10% of annual volume is food waste.

Co-owner Ashley Brady said she was impressed with Green Mountain. “To design, permit and build a large food waste composting facility in one of the wettest regions of the US, all in less than one year, was a pretty impressive achievement,” she said.

The aerated compost processing system is built under a covered roof structure. Compost feedstock materials are blended and formed into piles over the aeration outlets built into the concrete floor, and then the material is capped with a “bio layer” of wood mulch to contain odors.

The WebMacs aeration system from Green Mountain is computer-controlled to optimize temperatures across multiple zones to accelerate the composting process while keeping pile temperatures at optimum levels. That reduces the need for mechanical turning of the material, speeds up the process and ensures low operating costs, while mostly eliminating odors and anaerobic gas emissions such as nitrous oxide and methane.

Jeff Gage, director of consulting for Green Mountain, said, “We see this facility as a model for other mulch grinding operations to follow.”

Green Mountain was founded in 1992 to design, build and manufacture commercial composting systems and is dedicated to helping organizations reduce their environmental footprint, save money and produce quality compost.