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Composting toilets, the Bronx Zoo, and design that's disgusting

Posted 03.11.2007 by Dave
The flush toilet keeps humanity alive. Without toilets and sewers to carry away our poop, our waste would contaminate our drinking water, and our cities would collapse into epidemics of cholera -- just as they did in the eighteenth and nineteenth centuries, when skyrocketing populations overwhelmed the backyard cesspools into which they emptied their bowels. (Read the fascinating story of how humanity beat cholera in Stephen Johnson's The Ghost Map.)

But the millions of lives saved since humanity adopted toilet and sewers have come at a cost: every day we flush 108 million pounds of natural fertilizer down the toilet, while every day farmers exacerbate this imbalance in the food chain by applying 65 million pounds of nitrogen fertilizer to their land. But our sewage plants concentrate industrial contaminants and household chemicals into the sludge they produce, which means we can't reuse processed sewage even if we wanted to. In the meantime, we flush 36 billion gallons of water daily down a $250-billion dollar infrastructure built just to recover all that water we flush down in the first place.

A few weeks ago, a reporter for the magazine Scienceline interviewed me about these issues -- issues that I examine in depth in my book. Last week she learned that the Bronx Zoo recently opened a state-of-the-art public bathroom with composting toilets to reduce water usage and recover waste for use as fertilizer. So on Saturday my wife and I joined Andrea the reporter to coo at grizzly bears, marvel at tigers, and check out the new facilities.

The restrooms are bright, airy, and plastered with infographics explaining the benefits of the Clivus Multrum foam flush toilets. Instead of flushing with 1.6 gallons of water, these toilets generate a biocompatible foam to lubricate the bowl and wash your waste down into the compost receptacle below. It uses just three ounces of water -- 98.5% less than a normal toilet. According to Clivus Multrum, this facility will handle over 500,000 people a year and save over a million gallons of water.

(Even though this new restroom opened in November, there has been no press because the Zoo convinced all the papers to wait until Earth Day in April to publish anything. Which means this site just scooped the New York Times!)

After giving the facilities a go, Andrea, Jenny, and I reconvened to discuss our impressions. All of us marveled at how nice the restrooms smelled -- not Pine-Sol good, but better, like fresh sawdust. Even though poop was busy composting in receptacles just below the toilets, and even though there were no traps or filters between the poop and our noses, the system was perfectly ventilated. The architecture was great, the place was sparkling, and everything about the experience was top-notch -- except when it came to flushing the toilet.

Whenever I'm in a public toilet, my inclination is to flush with my foot. That's what my dad taught me, and the lesson stuck. No matter how clean-smelling these toilets may be, they're still public toilets, and public toilets are disgusting. No one wants to touch anything in a public toilet. And yet:

I didn't want to touch the toilet lid, which I had to move to access the flush button. And I certainly didn't want to touch the flush button -- never mind touching it twice, as the sign implores. Enlightened pooper though I may be, I can only imagine all the disgusting fingers that have been jabbing into that hole -- fingers that have just swiped toilet paper across a dirty butt, but have not yet been cleansed with soap and water.

At minimum, the flush mechanism should be a traditional handle. Better yet, it should be a giant, friendly knob that you want to turn -- a fun, whimsical, sanitary interface that's in keeping with the architectural spirit of the bathroom. Not this dark, recessed, disgusting plastic button in which God knows what will surely collect.

People don't like change. And people certainly don't like changing something as fundamental as the way they go to the bathroom. As one of only two points of interface between the pooper and the toilet, I worry that this flush button will single-handedly make 500,000 people a year associate the experience of ecologically-sound toilets with sticking their finger in some disgusting hole, twice. With as critical as these new toilets are to the future of humanity, that's an association humanity can't afford to make.

Show some poop support, or make a poop retort.
Di Uhreea (410) -- 03.12.2007

Nice vid in there, too, Dave.
Do you just push the button once or do you have to hold it?
I can't believe they don't even have a mechanism over that stupid hole that would easily push the button!
Surely this beta version of this perhaps great idea can be easily upgraded?
Are these models of foampottys used anywhere else?

One more question, what are you doing up this late/early???

daphne (3667) -- 03.12.2007

You could always just wrap a few layers of toilet paper around your finger and then push the little button.

Very, very interesting article.
_______
.....hugging bunnies since 1969
www.daphneszoo.com

GottaGoGirl (2616) -- 03.12.2007

Maybe they could provide some sort of bio-friendly disinfectant wipe with which to clean your hands before or after or both. That would probably be wasteful, though, wouldn't it?

Hmmn. Surely if this is the prototype, future versions could be modified to make it less disgusting. Why couldn't this toilet have a foot-pedal that activates the foamy action?

healthy 1 (1427) -- 03.13.2007

I agree GGG. Future models could be implemented with a foot pedal, or at least a traditional flush lever.

I enjoyed this article very much. It shows that we are heading in the right direction, in understanding the environment. I truly hope that this idea catches on, as it will save the public lots of $$$$, add proper nutrients back into the soil (saving our health), as well as save our environment.

The next step is to urge the large companies to produce less evironmentally harmfull chemicals. That way, sewage plants will be more able to treat large cities sewage in a way that it can be uses as fertilizer.

"Thunder in March betokens a fruitfull year" .Or is it "Thunder in March, frost in June"?

Dave (11657) -- 03.13.2007

To answer some questions:

- You only need to press the button, not hold it.

- To judge by the Clivus website, that button seems pretty standard on their foam flush models. As you'll read in my book, I think foam flush technology has a *lot* of promise, so I'm confident that they'll get the usability issues worked out.

- I agree that a foot flush is a good solution. But I think it's best for these toilets to mimic the conventional toilet as much as possible in terms of user experience. The goal should be to get people to embrace these as a non-disruptive alternative. Foot flushes are cool, but that would make the toilet seem weird, too. Why design in barriers that discourage acceptance? A traditional flush handle will help people accept their new bathroom future.

- I couldn't sleep.

The Big Wiper (2245) -- 03.13.2007

Oh, my. Jonesing for a toilet design. You are truly a pooper trooper, Dave-O.

Pulling My Pants Down For Peace, Plop and Posterity!

shitwit (571) -- 03.14.2007

After watching the video clip it seems that an unusually sticky or large turd would be very difficult to get flushed down. But the concept is heading in the right direction and I hope these toilets catch on in the mainstream.

_______
Rock-n-roll! Poopy-poo!

Dave (11657) -- 03.14.2007

Shitwit -- the foam isn't supposed to move the poop down so much as lubricate the walls of the bowl so the poop slides down into the composter below. That's why they encourage you to flush before you go as well as after.

GottaGoGirl (2616) -- 03.14.2007

Was there a poo stick available nearby?

The Dumpster (2506) -- 03.16.2007

This thing is basically just a gussied-up privy.

Dave, typhoid fever is another water-borne disease that was just as deadly in past centuries as was cholera. It is still a danger in undeveloped parts of the world.

Historical trivia: Prince Albert died of typhoid, which meant, basically, that he got some poop in his drinking water.

johnnygizmo (not verified) -- 03.18.2007

Good step in the right direction. However...I just started my first poop compost heap at my summer camp last year. My new poop cycle includes all I learned from The Humanure Handbook....I'm fecalphobia free....

ThePoopMime (25) -- 03.19.2007

I enjoyed this article. Next time I go to the bronx zoo Im going to treat myself and poop in one of those toilets.

_______
40,000 Americans are injured by toilets each year.

Lame comment!
jooxn (not verified) -- 04.25.2007

hey...why don't you just WASH YOUR HANDS!? what a weird neurotic mess you all are. so you don't push the button-- do you think your hands are clean? hate to tell you, but you are avoiding nothing...every single neurotic like you has to push the door on their way out of the stall.

Dave (11657) -- 04.25.2007

Neurosis isn't the issue. The issue is that if we're going to get Americans to accept alternatives to their current lifestyle, we need to show them that the alternatives are as good or better than the status quo. You can't expect people to embrace change if change is kinda disgusting.

bruce (not verified) -- 06.02.2007

I'm with jooxn! Get over your neurotic self. Mixing potable water with feces is just begging for someone to drink it later, downstream. I know, they add some chlorox to the fecal mix before they drink it, but so what? That really makes things healthy doesn't it? People gotta get over the fantasy of "away" for trash, refuse, and "waste" of all kinds, and learn that EVERYTHING that goes around, comes around. GROW UP, PEOPLE!

Corrinacorrina (not verified) -- 10.30.2008

I have been so happy about the Bronx Zoo ceramic foam-flush toilet ever since I first learned about it. "Disgusting Bronx Zoo toilet design" threw you up on a google search (which may have been the intention) and so I braced myself to learn its fatal flaw. Relieved to find you just have an issue with the handle. I was so inspired I included it in a loo presentation: http://corrinacorrina.vox.com/library/post/this-is-the-toilet-keep-drinking-water-for-drinking.html

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