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Why Worms In the Toilet Might Be a Good Idea
derekmead writes "Billions worldwide still don't have access to proper sanitation, and those that do still require a ton of water and electricity to keep waste flowing. A French company is offering one solution: Use turd-eating worms to compost waste right at the source. Ecosphere Technologies has developed an outhouse that, rather than relying on chemicals like a port-a-john, relies on about a pound of red wiggler worms. A new installation in Quebec uses imported worms, placed inside of a mixture of dung and straw underneath to toilet, to devour feces delivered to them by a conveyor belt system. (When someone uses the toilet, pee filters through sand to wash away, while a pedal allows the user to transport their poo to the worm space.) The whole system uses no water or electricity, and a series of passive vents allegedly keeps the toilet smelling great. The company claims it can be used 10,000 times without servicing, which is far better than what a port-a-potty can boast, although with a current price tag of $40k for the worm system, port-a-potties are still a lot cheaper."
$40K can put in a pretty big septic system, with cistern and rain catchment to provide the liquid for flushing. You can probably get a grey water pond out of it as well if you plan it right. Still, a lot of money for a pound of worms.
In Australia we already use composting toilets on country roads for rest stops etc. They don't smell and are cheap to produce and maintain and the ventilation fan runs off a solar cell on the roof. Why should someone pay 40k for old tech?
sudo mount --milk --sugar
Most people don't realize it, but the humble, ubiquitous earthworm is an invasive species in North America. Though you might think of it as useful and beneficial to the soil, in the forests of north America, the earthworm is causing a lot of damage. So I get a bit concerned when they start talking about throwing in "imported worms."
The worms aren't necessary, and neither is the $40k price tag. There are already composting toilets available commercially in the $500-$2000 range. And even that's overpriced because they're relatively new. I've heard of people making their own with a 5 gallon bucket (cheapest way to test for yourself how well they work). All you need is a handful of peat moss or coconut husk, and a spoonful of microbes to get the process started.
And before you ask, no they don't stink. The stinky smell comes from anerobic bacteria breaking down fecal matter. When you immerse feces in water, it cuts off the oxygen supply which kills the aerobic bacteria, and the stinky anerobic bacteria flourish. Because a composting toilet channels liquids away from the solids reservoir (the 5 gallon bucket works better for men), the aerobic bacteria dominate and break down the feces without causing the stink. Think about how much biomass there is outdoors in wild animals. If all their feces stank that badly as a sewage treatment plant, we'd never want to go outside.
They're starting to become popular aboard boats, where dumping laws require toilets flush into holding tanks which can to be pumped out back at the harbor. These holding tanks and their plumbing tend to leak and stink up the boat after some years.