I really should go to Blumats & beds. That style of growing certainly suits my inclinations. I have already purchased the Blumats. Once I have my select cuts of my current strains, it would be a good time to transition...
In the mean time, I use a few large rubbermaid-type plastic bins (30-40gallons) to recycle my soil.
Soil bin #1 holds the current batch of soil.
Soil bin #2 receives all used soil, as well as some homemade vermicompost with worms.
That is one tray of vermicompost from the worm factory. Notice that some partially decomposed stems, rice hulls and bits of char are identifiable.
I use three terms to refer to the product of worm composting
-EWC is either vermicastings or vermicompost, whatever you've got.
-vermicompost is material that has been worked over by worms but has not yet completely composted, so still contains actively decomposing material as well as vermicastings.
-vermicastings are completely decomposed and finished worm castings.
Here is my Worm Factory 360. I added two extra trays for six total. I kind of want a second unit, so that I could grow more worms, but I don't need them.
New scraps and worm food go in the top. Eventually the bottom tray can be harvested, and it becomes the new top tray.
This diagram is slightly different than the 360 but the idea is the same. I harvest vermicastings from the collection tray and vermicompost from a lower processing tray.