Frequently Asked Questions about the Michigan SoilWorks CFT

How much feedstock can a Michigan SoilWorks CFT process?

Our smallest 4×8 foot single-module CFT can process 7 cubic feet (or 1/4 of a cubic yard or 25 gallons) of organic waste feedstock per week. These numbers increase linearly with the number of 8-foot modules.

Processing Capacity

  • 8 feet: 7 cubic feet
  • 16 feet: 14 cubic feet
  • 24 feet: 21 cubic feet
  • 32 feet: 28 cubic feet
  • 40 feet: 35 cubic feet

What is the output of a Michigan SoilWorks CFT?

Our smallest 4×8 ft single module will produce 3.5 cubic feet of screened worm castings per week

Output Capacity

  • 8 feet: 3.5 cubic feet
  • 16 feet: 7 cubic feet
  • 24 feet: 10.5 cubic feet
  • 32 feet: 14 cubic feet
  • 40 feet: 17.5 cubic feet

Note: You will see somewhat different output numbers on our pricing table. This is to account for the difference between the screened castings and raw harvest output which includes not only the castings but also coarser, unprocessed material which can normally be recycled back into the CFT.

I am not in the US or Canada. Can I still purchase a Michigan SoilWorks CFT?

Absolutely! We work with an export agent to provide worldwide delivery capability. Shipping and export/import costs vary by location.

Note: If you need to import composting earthworms, it is advisable to check with your local customs officials to remain in compliance with local regulations.

What are the sizes of your CFTs?

All Michigan SoilWorks CFTs are 4 feet wide and come in 8 foot modules. We sell up to a 40-foot model (5 modules). We recommend multiple lines if you need larger than a 40-foot model.

How much space do I need around a Michigan SoilWorks CFT?

6 feet is recommended along the main working side or aisle, while 4 to 5 feet of working area around the other sides of the CFT is recommended.

I would like to build this CFT myself. Do you sell the plans?

At this time, we do not offer plans for our CFTs. However, our plans are highly requested and we are considering offering them in the future. Please e-mail us to be added to a notification list if the plans become available for purchase.

What kind of worms should I use in my CFT?

Years of experience indicate the worms listed below are the most appropriate for CFTs. And the species you use depends upon your climate. Note: If you are vermicomposting in a climate-controlled environment, you may be able to employ an earthworm species that may otherwise not be optimal for your climate.

Temperate Climate Species

  1. Eisenia fetida (Red wiggler)
  2. Eisenia andrei
  3. Lumbricus rubellus
  4. Eisenia hortensis; Dendrobaena veneta (European nightcrawler, ENC, Belgians, Super Reds)
    NOTE:  European nightcrawlers burrow deeper than red wigglers and may not be the optimal choice for CFTs.

Tropical Climate Species

  1. Eudrilus eugeniae  (African nightcrawler, ANC)
    Note: African nightcrawlers also burrow deeper than red wigglers and some users report that African nightcrawler castings are susceptible to falling through the CFT’s mesh prior to harvest.
  2. Perionyx excavatus ( Malaysian / Indian Blue)

How many worms should I purchase for my Michigan SoilWorks CFT?

We recommend an initial stocking density of 1/2 lb per square foot. In our smallest single module CFT which features 32 square feet of vermicomposting surface area, this would equate to 16 lbs of composting worms.

Ultimately, the population will grow to a density of 1-2 lbs per square foot, but we advise starting out with a smaller quantity and allowing the worms to grow into the space.

What is the payback time on a Michigan SoilWorks CFT?

This depends on the size of your CFT and the assumed market price you can expect for the output. For a 16 foot model, we conservatively project a 17-18 month payback period to account for the 20 weeks of startup time followed by 12 to 13 months of vermicompost/worm castings sales.

Larger systems tend to have faster payback periods.

Note: This payback period is reduced if you are saving on waste disposal fees by using the Michigan SoilWorks CFT.

Is there financing available for a CFT purchase?

Yes, we can help arrange financing through agricultural equipment financing firms like Farm Credit Leasing Services Corporation and others.

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Or Call 248-938-9311