McGill composting systems
A McGill composting facility is an amalgamation of interconnected technologies and systems that make up our proprietary “technology.” This results in an industrial composting process that is flexible, robust and well-suited to the demands of processing very large volumes of highly-variable materials in a ordered manufacturing environment.
In fact, the design of our processing building is so specialized, some structural elements are integral to that technology.
The core of McGill’s industrial composting technology is a proprietary modification of the static pile, forced aeration composting method developed by Rutgers University in the 1970s. (One of the company’s founders was a member of that development team.)
Primary system components
- Encapsulated processing bays
- Proprietary in-floor ducting system
- Variable speed fans for air delivery and extraction
- Proprietary, computerized temperature control system for each bay
Processing begins with the important first step — blending. Types and volumes of feedstocks are selected to ensure the blended admixture falls within the tolerances of each parameter, ultimately coming together to meet the desired targets for C:N ratios, moisture levels, porosity and homogeneity.
Once blended, the admixture is moved to the assigned processing bay. When the bay is loaded, sensors are placed in the blended admixture, the door is closed and a computerized monitoring and control system takes over.
Each bay features a channeled, concrete floor designed to accommodate in-floor aeration ducting. The entire floor system is a proprietary design, with the intake pipes fed by variable-speed fans sitting outside of the processing bay.
Sensors embedded in the composting mass feed information to a computer that controls air supply to each bay, delivering oxygen and removing heat at a rate appropriate to that bay’s unique stage of biodegradation. Another fan pulls air out of the processing bay through extraction ductwork to the biofilter where air is “scrubbed” prior to venting.
The computer system also monitors and records bay temperatures on a on-going basis to verify Process to Further Reduce Pathogens (PFRP) attainment, which ends the primary composting process. The fresh compost is moved to an aerated curing bay where it meets Vector Attraction Reduction (VAR) requirements and completes the maturation process. The time required for curing varies according to the requirements of the end market. All compost meets or exceeds standards for the U.S. EPA’s Class A Exceptional Quality (EQ) compost prior to marketing and distribution.
- High-rate with rapid throughput
- No leachate to manage
- No windrow turners to maintain
- Ideally suited for high-moisture feedstocks
- Can handle challenging feedstocks, including biodegradable plastics
- Manages a variety of diverse, biodegradable materials in the same batch
SEE ALSO: Facility process overview
McGill composting systems = high quality products
To maximize the revenue potential of any composting operation, the products manufactured must consistently meet stringent quality standards. Landscape supply, construction, and stormwater management/erosion-control industries, as well as soil products retailers and others, build their reputations on the products they use and resell.
McGill composting systems deliver high quality products, suitable for sales and distribution to a professional marketplace where performance and premium quality are top requirements.
In additon to our professional grade mixes and blends, we also make a product specifically for conventional agriculture. (Please visit our compost products website for more information.)
Like to learn more about McGill composting systems and organics recycling services? Tell us about your project.