I've been reading Tradd Cotter's "Organic Mushroom Farming and MycoRemdiation" for the second time. I usually skim books for pertinent info when first buying, and then try to read cover to cover later... anyway, the point is that he has a small section I just read a few nights ago on Mycovermicomposting, stating the red wigglers thrive on a diet of spent substrate and feed on mycellium.
I have put some spent substrate from Oyster mushrooms in my outdoor
compost heaps and when I check on them after a few weeks, they are full of worms.
This is part of my plan for some new systems that I am trying to implement:
Grow Oyster Mushrooms on a substrate of straw, spent beer mash, and coffee grounds.
Feed spent substrate to worm bins to produce a high quality vermicompost.
Use vermicompost for compost tea for mass inoculation of gardens and fields
Additional vermicompost used for seed starting and rooted cutting pots for edible landscape plants.