Prince George’s County, MD Organics Composting Facility

Systematically Scaling from Mobile Pilot Project to Full Scale Facility

The Challenge

Putting the SG MobileTM To The Test


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 with GORE® Covers            SG Bunker™ System with GORE® Covers
  • 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 SG 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 a 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 with GORE® Covers 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.

Results Delivered

A Solution That Scales At The Right Pace


Prior to the demonstration project, Prince George’s County was composting only green waste, no 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 4 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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