Prince George’s County, Maryland, USA – Put the SG MOBILE® System to the test, then expanded to an SG BUNKER® System
In 2013, Prince George’s County was in need of a composting solution that was capable of composting food waste as well as green waste.
PROJECT DETAILS
Ownership: Maryland Environmental Service
Location: Upper Marlboro, MD
Start-Up: 2013 / Full Scale Expansion 2018
Product: SG MOBILE® System & SG BUNKER® System
Input quantity: 12,000 TPY / 57,000 TPY
No. of Heaps: 8 Heaps, 6 covered, 82 ft. x 26 ft. x 12 ft. each + 12 Bunkers
Treatment Time: 8 weeks in 3 phases
Aeration: Above Ground
Control Parameters: Oxygen Control Mode
Input material: Source Separated Organics / Yard Waste
Equipment: Pre-Treatment (Grinders) / Front-end-loaders / Mobile Screen
End Product: High Quality Finished Compost: LeafGro Gold®
THE SG SOLUTION
Pilot Scale Demonstration Project
Prince George’s County implemented an SG MOBILE® System with GORE® Covers (covered aerated static pile) Pilot-Scale Demonstration Project in 2013 as a way to test the following:
- Green Waste Composting
- Food Waste Composting
Of significant importance to the Pilot-Scale Demonstration Project was that the 8-week SG MOBILE® System process outperformed the existing 8-month windrow turning process for quality, time to manufacture, and performance.
In addition, the demonstration validated Prince George’s County’s ability to compost food waste at mix levels up to 50%, resulting in a quality product manufactured within quality specifications with positive results for odor control. Finally, the demonstration project validated positive results for operational modeling and ability.
PROJECT GALLERY
SG MOBILE® System & SG BUNKER® System at Prince George’s County Compost Facility
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- SG BUNKER® System
RESULTS DELIVERED
A Solution That Scales At The Right Pace
Before the demonstration project, Prince George’s County was composting only green waste, not food waste.
Year 2 – Post Pilot-Scale Demonstration Project – Prince George’s County continued to utilize the SG MOBILE® System with GORE® Covers for one year in a batch processing operating model to meet the demand of the food waste haulers who had come to rely on the facility as a necessary food waste recycling facility and destination point for their food waste materials.
Year 3 – Prince George’s County expanded the operation, adding one more SG MOBILE® unit and Phase III heap, so they could transition the operation to a continuous manufacturing model.
Year 4 – Prince George’s County expanded the operation by adding four more SG MOBILE® units to meet the continuing demand for food waste disposal, making the operation a 12,000 TPY facility configured with SG MOBILE® units.
Today, full scale, with the addition of the 12 SG BUNKER® Systems with GORE® Covers, the facility, with in-ground trenching for leachate capture and re-use to help protect the Chesapeake Bay ecosystem, is a 57,000 TPY full-scale organics composting facility.
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What our customers are saying…
“The Sustainable Generation® team provided us with outstanding hands-on assistance as we learned to use their system. We retrofit our existing positive air ASP system, which used a compost cap, by upgrading to the SG Mobile® System with GORE® Cover so we could address environmental and community concerns about odors and vector control, and also so we could scale up and expand our composting operation."
Justin Green, Executive Director & Founder Big Reuse
"With disposal and transportation costs increasing with no end in sight, plus an abundance of yard debris from our community, we decided to try biosolids composting at our Wastewater Treatment Plant to reduce our costs and create a Class A product. We went with the SG Mobile® System with GORE® Covers. The ease of operation and the cost savings made this a natural fit. The final product has been a huge hit with the locals who can't get enough Class A compost. We recently doubled the size of our composting operation to keep up with our increasing volumes and demand. This system is easily scalable to meet future demands."
Mike Miller, Public Works Director, City of Florence, Oregon
"We had no composting experience, so conducting a demonstration project with Sustainable Generation® greatly enhanced our understanding of food waste composting and helped us immensely with our subsequent expansion design process. During the selection process, it made a difference that SG's technology was already a proven solution for meeting VOC emission reductions for our San Joaquin Valley Air Pollution Control District."
Jonathan Kalpakoff, VP Mid Valley Disposal
“The Sustainable Generation® team provided us with outstanding hands-on assistance as we learned to use their system. We retrofit our existing positive air ASP system, which used a compost cap, by upgrading to the SG Mobile® System with GORE® Cover so we could address environmental and community concerns about odors and vector control, and also so we could scale up and expand our composting operation."
Justin Green, Executive Director & Founder Big Reuse
"With disposal and transportation costs increasing with no end in sight, plus an abundance of yard debris from our community, we decided to try biosolids composting at our Wastewater Treatment Plant to reduce our costs and create a Class A product. We went with the SG Mobile® System with GORE® Covers. The ease of operation and the cost savings made this a natural fit. The final product has been a huge hit with the locals who can't get enough Class A compost. We recently doubled the size of our composting operation to keep up with our increasing volumes and demand. This system is easily scalable to meet future demands."
Mike Miller, Public Works Director, City of Florence, Oregon
"We had no composting experience, so conducting a demonstration project with Sustainable Generation® greatly enhanced our understanding of food waste composting and helped us immensely with our subsequent expansion design process. During the selection process, it made a difference that SG's technology was already a proven solution for meeting VOC emission reductions for our San Joaquin Valley Air Pollution Control District."