Turd-eating worms clear air around Canadian toilets
Found on Physorg on Friday, 05 October 2012
A half-kilogram (1.1 pounds) of Eisenia fetida or red wiggler worms native to Europe imported from France and raised locally by Helene Beaumont are placed between layers of dung and straw in an underground space beneath the toilet.
Ecosphere's toilets are not cheap at Can$40,000 (US$40,800) each, compared to competitors that charge an average of Can$1,800. But Neau said the price will likely drop as sales increase.
That's been done for ages pretty much just like that: dig a deep hole, put a plank over it and cut a hole into it.