Project - Wood Waste in Compost Production
How Important is Compost Production in the US?
“The U.S. EPA has estimated that 250 million tons of MSW are generated, and contain 13.5 percent yard trimmings and 14.5 percent food waste (EPA, 2012). Therefore, the yard trimmings amount to about 34 million tons and the food waste to 36 million tons. Of the total 70 million tons, 27.4 million are composted (39%), based on the findings of the Columbia Survey.”
Whistler (Canada) Composting Facility Case Study
This video is of Whistler Composting facility located in Canada explaining their process of turning food and wood waste from the community and bio-solids from the sewage treatment plant into profitable, nutrient-rich Class A compost or bio-fuel.
They are using a Rawlings 460 HZX to grind the wood waste to the desired size.
How a Rawlings Wood Hog Works in the Wood Waste Recycling at Whistler
A Rawlings 460 Electric Stationary Wood Grinder and the state of the art in-vessel composting tunnels assist the community towards its goal of zero waste. Rawlings assisted with the design of the wood waste processing system to grind the incoming wood waste.
This system is complete with a belt in-feed and out-feed conveyor, metal detector, work platform, Rawlings Horizontal grinder, overhead self-cleaning magnet and electrical control panel to operate the system.The in-vessel system processes complex feed stock, while addressing concerns of odor generation and leachate. The system relies on fully enclosed flow through tunnels to transform organic wastes into a fine soil-like material over a 14-day period. By controlling oxygen, moisture and temperature, the in-vessel system provides control over the decomposition of organic matter that exceeds all standards set for composting facilities in North America, the United Kingdom and Europe. Compact, fully enclosed and modular in design, the system is not affected by the weather.
Rawlings Wood Hogs offer a complete line up of wood waste processing equipment for helping mills in the sawmill and plywood industries convert their wood residuals into valuable wood fiber products. We offer vertical, horizontal and rear maintenance grinders in a full range of sizes, stationary, portable, diesel or electric powered. With a wide variety of available options, and you’ve got the flexibility to customize the perfect wood recovery system.
Whistler Composting Facility Facts
- Built in 2008
- Facility cost $13,000
- In-vessel system controls heat to kill pathogens
- Mix of wood chips and bio-solids
- 50 – 60 tons are processed a day
- Compost is processed for 2 weeks and then cured for 4 – 9 months
- The Rawlings Wood Hog grinds about 2000 tons a year
- Over 9 years, the facility sold over 100,000 yards of compost