THE INTERMODAL EARTH FLOW 

One of the big costs for In-Vessel composting is the vessel itself. By replacing our standard vessel with a shipping container we can substantially reduce the cost of a system. The floor and walls of a standard shipping container are insulated and lined with stainless steel to provide a long service life and reduce corrosion. The vessel includes the same automated auger mixing system with positive aeration and ventilation system for odor control.

The other key advantage is transportation.  Intermodal shipping containers are much cheaper to transport, especially when shipping overseas.  We offer 20, 40, and 53 ft lengths using the high cube style container. We are excited to bring this product to the international marketplace.

 

Intermodal Installations

Intermodal Earth Flow at Wikholm Anleggsgartnermester in Olsvik, Norway

Intermodal Earth Flow at Archway Equestrian Sports in Woodinville, WA

The Earth Flow Intermodal Composting System can be operated as either a batch or a continuous flow composting system:

  • Batch Process: the system is fully loaded with feedstocks. These materials are composted as a batch and then fully discharged. This approach works well for materials such as biosolids, where it is necessary  to isolate material for pathogen reduction.
  • Continuous Flow Process: feedstocks are added into the load end of the vessel and compost is discharged from the other end. In this process, the auger moves the compost slowly toward the discharge end of the vessel. Once materials arrive at the discharge end, the compost is ready to be removed from the system.

 

 

COMPOST PROCESS

1. Feedstock Loading

An organic “recipe” (for example, a mixture of food waste and wood chips) is loaded into the Earth Flow through the load doors via a                      variety of means including manual emptying of containers, using a front-end loader, using tote tipper or chute.

Plastic contamination should be limited. Hard foods such as pineapples, hard crusted loaves of bread, etc. should be chopped up prior to       addition. Since food scraps are wet, a dry bulking agent such as wood shavings must be added to create a balanced compost recipe.

Prohibited materials in an Earth Flow include: long-fiber materials such as tall weeds, rope, clothing, tree branches, bioplastic bags(these get wrapped around the auger) as well as large rocks and sand.

2. Mixing and Active Composting

Once the new material has been added, the traveling auger system blends the new feedstock with existing compost mass. A complete mix can take 30 minutes or more. The auger is programmed to mix automatically one to four times per day.

Thermophilic composting at temperatures above 115° F occurs rapidly in the insulated bin. The food wast “slow cooks” at this temperature and is easily shredded by the auger. Continue adding feedstocks until the bin is filled to the top of the auger screw.

3. Unloading and Curing the Compost

Once the active composting cycle is complete (approximately 14-21 days), composted material can be removed through the discharge end of the vessel. There should be no residual food waste and the material should have a pleasant odor and a black or dark brown color.

The composted material can be discharged automatically using the auger into a bin, rolling cart, truck or conveyor. Alternatively, a front end loader can enter the system to remove compost directly.

This compost can be used immediately as a cover mulch or can be cured in a pile for 30-60 days before being used as a soil amendment. Screening will eliminate residuals (for example, bones and large wood chips) and plastic contaminants, making the finished product even finer.

The Earth Flow Intermodal Composting System is designed for ease of transport. It is ideal for international communities and organizations including:

  • Schools and Universities
  • Corporate Campuses
  • Remote Communities
  • Resorts
  • Equine Facilities
  • Military Bases
  • Farms

FEATURES

The Earth Flow has an integrated mixing system that allows the compost to be mixed on a daily basis (2-4 times per day). Traveling auger technology provides optimum conditions for hot food waste composting with seven distinct operating functions:

  • Shred – The auger tears up food waste clumps as they cook to reduce particle size and increase available surface area, making the particles more available to the microbes.
  • Mix – The auger mixes material by folding food waste into bulking agent.
  • Aerate – The auger continually fluffs the compost to add oxygen to the matrix.
  • Distribute Moisture – The auger sweeps up wet material from the base of the pile and elevates it to the surface. This maintains an even distribution of moisture throughout the pile.
  • Homogenize – The auger homogenizes food waste with bulking agent for an even distribution of nutrients.
  • Transport – The auger slowly increments compost from the load end to the discharge end.
  • Stack – As compost reduces in volume, the auger continually stacks the material toward the back to maximize utilization of the space.

BENEFITS

  • Low Cost – By upcycle a standard shipping container for the vessel for the Earth Flow, we reduce the system costs by 20%.
  • Ease of Transport – The intermodal vessel makes international shipping much easier and less expensive.
  • Limits Pests and Nuisance Odors – The Earth Flow system incorporates five different engineering controls to prevent pests and nuisance odors.
  • Superior Compost Quality – The inclined/vertical auger combines with the positive aeration system to produce an extremely rich, light, homogeneous, oxygenated compost.
  • Cost Effectiveness – For its size and capability, the Earth Flow is the most cost effective in-vessel composting system on the market today.
  • Small Footprint – When space is restricted, the Earth Flow is ideal because it maximizes the amount of composting that can be done on its very modest footprint.
  • Complete Control – The Earth Flow gives you complete control of your composting process, allowing you to control temperature, moisture content by adjusting patterns for mixing, aeration and moisture addition.
  • Speed of Composting – The Earth Flow system is capable of thermophilically composting food waste in 14-21 days (an additional 1-2 months curing time is recommended after compost exits the Earth Flow).
  • Year Round Composting Capability – Designed and field tested for extreme weather conditions (such as snow, wind and extreme cold).
Vessel Specifications EF-20 EF-40 EF-53
System Capacity (cubic yards) 20 40 57.8
Processing Capacity (lbs / day) 1178 2667 3200
Processing Capacity (tons / day) ~0.50 ~1.1 ~1.6
Length – Overall 20′ 40′ 53′
Width – Overall 8′ 8′ 8′
Approx System Weight (lbs) 6,800 12,500 16,250

BLOG POSTS ABOUT THE INTERMODAL EARTH FLOW

Intermodal Earth Flow CutSheet
Intermodal Earth Flow CutSheet