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 and 40 ft lengths using the high cube style container. We are excited to bring this product to the international marketplace.
The Earth Flow Intermodal Composting System can be operated as either a batch or a continuous flow composting system:
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:
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:
|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|