Worm composting

I've been composting (well sorta.. many failed attempts, and several that worked but that I never got to use.. long story) for several years, but the biggest problem is not how to do it, but more importantly the methane gas that is produced. Methane is one of the worse green house gases, and regular composting produces it in large amounts.

Worm composting produces some methane, but less then traditional composting. After a few days of looking for how to for worm composting I found the best reference in the below video.

The general calculations are:

1 square foot of surface are can house 1 lb of worms which can digest 1/2 lb of food waste per day.

in metric

0.205 m^2/kg of worms. So a 30cm x 70 cm bin can support 1kg of worms and digest 500 g of food waste/day. In the video they use two plastic bins to house the worms, the top for the worms and the bottom to hold the water that passes through (which is also a fertilizer and a natural insecticide.)

The Enviromentals (Episode 1) How to Make a Worm Composting Bin from Hal Brindley on Vimeo.