West Yellowstone Waste District

West Yellowstone, MT 2016
in-vessel compost system
Aeration ducts
ECS Luck/Now feedstock mixer
ECS CompTroller
aeration distribution
in-vessel compost system
Aeration ducts
ECS Luck/Now feedstock mixer
ECS CompTroller
aeration distribution

Capacity (TPY)


Technologies Used

Client Needs

The District issued an RFP seeking a single vendor to provide a turn-key Municipal Solid Waste (MSW) composting facility that would: 

  • Process up to 40 tons/day of Municipal Solid Waste (MSW) per year in a region known for extreme winter conditions (later converted to Source Separated Organics); 
  • Require few operational staff and a small footprint; and, 
  • Provide in-vessel composting of mechanically sorted MSW. 

ECS Solution

ECS teamed up with Montana based, DA Construction, to build an enclosed compost facility featuring an in-vessel tunnel composting system. 

Pre-Processing: A wet mill homogenizes the floor sorted MSW, mechanically reducing paper and other feedstocks without shredding or grinding. The wet mill includes a coarse trommel screen section that removes 5″+ physical contaminants. Fines passing through the screen are conveyed to a heavy-duty mixer that blends them with biosolids and bulking agents. 

In-Vessel Tunnel: Primary composting takes place in seven low-headspace vessels that feature a sophisticated aeration design and the ECS CompTroller™ (automated process control system). These concrete and stainless steel vessels hold up to 175 yd3 each. The raw mix is moved from the mixer to the vessels with a specialized vessel loading conveyor system. This vessel loading system reduces labor, uses vessel space more efficiently, and minimizes worker exposure to feedstocks. 

Product Curing and Refining: An aerated static pile curing process follows primary composting in-vessel. After product curing, front-end loaders move the compost to the product refining area. An in-feed hopper evenly meters the product over a vibrating screen and then to an air-classification de-stoner, that removes physical contaminants in preparation for markets.

The compost that the West Yellowstone Compost Facility produces is used for projects within the Yellowstone National Park and West Yellowstone/Hebgen Basin Solid Waste District.

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Whenever I have a question or an issue with our system I call ECS. Typically, they listen to the problem, ring off to do some research, and then call me back and walk me through trouble-shooting to solution. ECS provides excellent customer support. John Burns Facility Manager, West Yellowstone Compost Facility

Contact ECS to learn more.

We want to learn how to support your composting goals!

4220 24th Avenue West
Seattle, Washington 98199

Tel: (206) 634-2625
Fax: (206) 634-1309