Vermicomposting, worm bin, composting with worms community and forums
December 18, 2012 I decided to see if used coffee grounds (UCG) could be composted just by adding some finished vermicompost. I got a Sterilite clear shoebox and filled it 1/2 full with UCG, with paper coffee filters included, and then added a good covering of finished vermicompost. I mixed it up a little and then waited. December 28th I checked in on the project (plus plenty of times before that) and felt that not much was happening and decided to add some worms to speed things along. So I added 45 mature worms to the box and then covered it with moist shredded newspaper. I checked on it over the next few weeks but left them pretty much alone. Today, February 21, I decided the experiment was over and wanted to see the results. I emptied the box into a plastic bin to harvest the castings, count the worms, and see what else happened over the past 2 months.
The first thing I noticed was that it didn't smell of coffee anymore, it just had the nice earthy smell. The second thing I noticed was that the worms were in very good shape. They were moving around alot and were nice and plump. So I started the seperating process. The coffee grounds were thoroughly processed! The paper filters were gone and the coffee looked like regular vermicompost. I ended up taking out 5 1/2 qts of compost, 60 mature or nearly mature worms, 3 tiny babies, and quite a few cocoons.
I was very happy and kind of surprised that it went as well as it did considering that the only food they had were UCG and 'finished' vermicompost. Plus the box was so small AND it had clear sides AND no air holes drilled in the top or sides. Three things considered a no-no for raising worms. Just goes to show that when it comes to worms nothing is black and white.