
It's
World Toilet Day. Why?
Even though the concept has been around for thousands of years, 2.5 billion people worldwide are without access to proper sanitation, which risks their health, and kills 1.8 million people a year. It's a topic that is taken pretty seriously by many people.
There's a
World Toilet Organization which is a global non-profit committed to improving toilet and sanitation conditions worldwide. Then there is the
World Toilet Summit this year from 2 to 4 December in Singapore.
Toilets also use a lot of water. The amount of water used in toilets is a significant portion of personal water usage, with an average of 24 gallons used per capita per day in 1990 in the United States. Toilets and urinals are flushed with potable water and it is estimated that up to 20% of the available drinking water in the world is flushed down the drain, wastefully. In addition, leakage of water delivery lines may add an additional 8% to the above. As demand for water hits the limits of finite supply, potential conflicts are brewing between nations.
That's why I think
the waterless urinal is a pretty neat invention. The technology behind the setup is fairly simple. A biodegradable liquid sealant, such as oil or alcohol that is lighter than water, floats on top of a conventional water-filled drain. The barrier layer, a one-way seal, allows liquid waste to flow through but blocks sewer gases from coming back up and entering the restroom.
A single waterless urinal can save an average 20,000 to 45,000 gallons of water a year. which means it takes only about twenty-two waterless urinals to save 1,000,000 gallons of water per year. It can be estimated that there are approximately 8 million urinals installed in the US. Assuming an average 1 gallon flush, the potable water use of urinals alone, in this country per year, is approximately 80 billion gallons. 80 billion gallons of water is equivalent to the water usage of 250,000 homes or 1 million people per year.
I've only seen a few of these so far, but I expect they will become more common and the world places more value on fresh water.