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My First Rotary Vermicompost Harvester

I've been watching the site for about a month now. Researching, looking into the FT designs and looking at the harvester for separating the VC. In the past I have had a couple of 3 X 3 frames that have ¼ and 1/8 screening on them. They are a pain to use. I decided to make a rotary harvester. I'm a little compulsive to say the least. I wanted a way to be able to separate the large (not so ready) VC from the VC that was most likely to have pods contained in it and also have the really finished compost all separated in one pass. I built one that separates all three sizes. Here are a couple of pictures (kind of looks like a jet engine J).

I have incorporated the wheel design I have seen a couple of times but then added an adjustable board to change the angle:

I made the standard tube with 1/8 inch screening and then slid another tube (made frm an old HVAC duct) inside with 1/4 inch screening.

The inner tube extends out the end about 12 inches further than the outer tube allowing for separation of the really big stuff from the smaller (possibly containing pods) compost. The really fine compost ends up underneith in the middle, and the other two sizes are in a bin at the end with a cardboard separator:

My 12 year old daughter loves using this. She wants to keep feeding the large VC back through to see if we can get any more small stuff out of it.

My next project is the FT bin. I started framing it out today. Look for updates in a week or so.

Views: 853

Comment by Stephanie on June 30, 2010 at 11:19am
Very cool Larry,
It looks fast and effecient. I think by next summer I'll have enough VC to make use of something like this. Thanks for sharing.
Comment by Steven Chow on June 30, 2010 at 10:51pm
That is cool. Great photos!
Comment by Diana on July 1, 2010 at 3:56pm
wow I love this... looks like it would make everything easy
Comment by Michael on July 1, 2010 at 5:27pm
I like the design, it looks really good.
Comment by Don Dillon on July 2, 2010 at 5:45am
Do the wheels on your unit swivel, or are they stationary like on my harvester. I noticed that if you didn't have the wheels aligned, then there was a tendency to ride up the bucket a little bit.

Here is a photo of the wheel base
Comment by Gardener Larry on July 2, 2010 at 7:51am
Unfortunately they swivel. I didn't notice the type when I picked them up. I placed them close enough together so that when they are positioned "swiveled out" the bucket is at the right height. That compensated for them wanting to swivel outward and solved that problem. And they fit perfectly in the little groves so they done shift at all. Of cource I am just turning it by hand. I don't think I can hook a motor up to it.


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