Installing a composting toilet.

Ajax

Super Anarchist
14,999
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Edgewater, MD
@Kris Cringle Have you emptied it yet?

Did you just bag and bin the contents or did you pour any bleach in? I've read certain accounts that you're supposed to bleach the contents to kill any remaining bacteria before tossing in a dumpster.
 

Jim in Halifax

Super Anarchist
1,987
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Nova Scotia
Did you just bag and bin the contents
I think I would consider using it on the flower beds (maybe not the vegetable garden tho...) There's probably some law about disposal, but I imagine its certainly a lot more pleasant thing to bin than those biodegradable plastic bags of dog poo.
 

Kris Cringle

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@Kris Cringle Have you emptied it yet?

Did you just bag and bin the contents or did you pour any bleach in? I've read certain accounts that you're supposed to bleach the contents to kill any remaining bacteria before tossing in a dumpster.
No, just bagged, tied and put it in the harbor dumpster which is truck tip-type. That's legal and recommended instead of using any small trash receptacle that may be handled. It's a much smaller bag than I expected and not much bigger than some of dog poop bags stuffed in stations around our harbor.

I was going to use our leaf compost but didn't, this time. That would be best but I may not be around that.

The Brits living and composting on canal boats have volumes on ways and means that they incorporate their waste into their compost, onboard. They even have services that will pick it up for a fee like household compost independents.

The other thing I've noticed, our public docks have been swamped this season. It's becoming an ordeal in mid summer to get to the pump out space. You could spend an hour or more waiting.
 

Ajax

Super Anarchist
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3,285
Edgewater, MD
I think I would consider using it on the flower beds (maybe not the vegetable garden tho...) There's probably some law about disposal, but I imagine its certainly a lot more pleasant thing to bin than those biodegradable plastic bags of dog poo.
Although it's possible to do so, I would not use human waste on anything I was planning to grow and eventually eat. Flower beds, sure.

Yeah, some kind of composting toilet sure sounds appealing. I just can't seem to get around the space restrictions. I still need to measure the dimensions of Kris' toilet though.
 

Kris Cringle

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I think I would consider using it on the flower beds (maybe not the vegetable garden tho...) There's probably some law about disposal, but I imagine its certainly a lot more pleasant thing to bin than those biodegradable plastic bags of dog poo.
They have been discussing that ad nauseum for years on the UK boat and off grid composting toilets. I couldn't possibly read them all but the consensus seems to be 6 months that any harmful bacteria can survive. They seem to be advanced in the UK on this subject and much other info you get on this subject is not correct.
 

Max Rockatansky

DILLIGAF?
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in that 2 quarts of water is the minimum to break the bricks down
wait.... IIRC, Shearlock (The Boat Galley) talks about 2 _cups_ not 2 quarts? Are you sure about that number?

from her website: "now use just 1 cup of water per 2.75 pound brick, and initially fill the composting bin about 2″ short of the agitator." She uses a Nature's Head
 

smj

Member
252
195
We use 1-1.5 cups of water on the brick. Once broken apart we leave the coir in the bucket until dry then bag it up separately.
 
Just 2 cups of water for a brick of coir for us, less is more I guess.

As mentioned up thread we’re at 13 years and counting with the Natures Head. Of all the heads we’ve had (5 so far over 30 years) its been on the boat the longest so far. Very happy with it minus a few nits.

It has a positive lock for the lid on the container bin itself so flipping the boat upside down wouldn’t unload the contents. The urine bucket would probably empty but thats ok. The dinky L brackets keeping the thing bolted to the head floor is another matter.
Well made if not a little agricultural in appearance which is ok.
I’m increasingly curious about the OGO. It looks like swapping out would involve way less drama than the Nature’s Head. That thing is awkward and unwieldy to say the least.
 

Kris Cringle

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wait.... IIRC, Shearlock (The Boat Galley) talks about 2 _cups_ not 2 quarts? Are you sure about that number?

from her website: "now use just 1 cup of water per 2.75 pound brick, and initially fill the composting bin about 2″ short of the agitator." She uses a Nature's Head
wait.... IIRC, Shearlock (The Boat Galley) talks about 2 _cups_ not 2 quarts? Are you sure about that number?

from her website: "now use just 1 cup of water per 2.75 pound brick, and initially fill the composting bin about 2″ short of the agitator." She uses a Nature's Head

Yeah, I've done it twice. Could these bricks be further dehydrated to start? I leave the coarse broken brick and water for a couple hours, mix a couple times in a bucket.

Here's an account from a happy user:

5.0 out of 5 stars Ideal for use in modern composting toilet
Reviewed in the United States on September 11, 2018
Item Package Quantity: 5Verified Purchase
We have a Nature's Head composting toilet on our sailboat. A single Plantonix Coco Coir Brick mixed with 3 quarts of water makes exactly the right volume, about 2-1/2 gallons, to properly set up the Nature's Head for another 2 months cycle of use, without any waste. And because the bricks are so compact, we can easily store a few of them aboard the boat for future use.
176 people found this helpful




Doesn't seem any less water would enable it to even begin to break into smaller pieces. Also, these bricks yield about 30% more than I can use to fill to the top of the mixing bars (what OGO recommends).

I'll keep cutting back though,... The less water you add the better, obviously.
 

Diarmuid

Super Anarchist
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Laramie, WY, USA
Yeah, some kind of composting toilet sure sounds appealing. I just can't seem to get around the space restrictions. I still need to measure the dimensions of Kris' toilet though.
You are clever -- you can build one to suit! Composters are very simple things. A bucket, a stirrer, a vent hose, and a funnel. Our Ballad would never fit a Nature's Head or AirHead unless maybe right in the cabin center: too narrow, with pinched IOR ends. Hell, it barely fit the tiny little Jabsco it came with. Maybe a C Head could be modified to fit -- but the C Head was (and is) basically a garage-made composter.

So I moved the head back to the nav station from the forepeak and built a custom cabinet to fit it. Still in Advanced Prototype stage, where unfortunately many of my designs tend to remain, but....
headfinal2.JPG

You can see the hull curvature we had to accommodate. Still managed to fit a 6 gallon poop bucket in there: cat litter container, because rectangles.

headfinal1.JPG


Custom-made epoxy/glass pee tank holds 10qts (more than you really want to store between dumpings) and includes carry handle, sealing lid, and float switch to signal near-full condition. Pee funnel I bought from an Etsy dude who 3D prints them.

headfinal3.JPG

Other features which may or may not ever work as planned: a 'flush' switch which runs an inline blower for some timed interval (2 minutes?). Blower is explosion-proof because burritos. A muffin fan which runs for maybe 30 minutes, or maybe at timed intervals, or maybe hard-wired to the solar PV (??). A super-bright LED strip behind the pee tank which illuminates with the flush button or when the float switch says FULL. You could (hopefully) view pee level thru that oval sight glass.

I had been reluctantly planning a flip-up cover (or Ensolite/vinyl cushion) to make it look more bench-y and less toilet-y, but that was for another person's sensibilities. I'm not especially bothered by it. A simple curtain will give the delusion of privacy. ;)

None of this is hard, or I couldn't do it.:p
 

a8b

Member
87
28
Although it's possible to do so, I would not use human waste on anything I was planning to grow and eventually eat. Flower beds, sure.

Yeah, some kind of composting toilet sure sounds appealing. I just can't seem to get around the space restrictions. I still need to measure the dimensions of Kris' toilet though.
There is a western idea of not eating food grown with human feces. I think it is wrong.
In the east they have been growing rice fertilized with ones own human feces for thousands of years. However they do not deliver it by broadcasting/throwing it on the plant, as westerners do, but by dissolving/placing the feces in water and flowing it over the plant roots.
You would think they would know if it was problematic.
 

mrybas

Member
210
120
I also recently installed an OGO. I’ve only been using it for a week, but so far so good.

I’m using coconut coir as well, but used a sharp chisel to shave the brick and then added a small amount of water to fluff it up. Wet to the touch didn’t make sense to me, so kept it on the drier side. No smells with 2 people using it daily.
I have it temporarily vented overboard through the emergency escape hatch as I wasn’t keen on cutting a hole unless I knew the OGO would work well.
 

Brawr

New member
14
13
New Zealand
You are clever -- you can build one to suit! Composters are very simple things. A bucket, a stirrer, a vent hose, and a funnel. Our Ballad would never fit a Nature's Head or AirHead unless maybe right in the cabin center: too narrow, with pinched IOR ends. Hell, it barely fit the tiny little Jabsco it came with. Maybe a C Head could be modified to fit -- but the C Head was (and is) basically a garage-made composter.

So I moved the head back to the nav station from the forepeak and built a custom cabinet to fit it. Still in Advanced Prototype stage, where unfortunately many of my designs tend to remain, but....
View attachment 530420
You can see the hull curvature we had to accommodate. Still managed to fit a 6 gallon poop bucket in there: cat litter container, because rectangles.

View attachment 530421

Custom-made epoxy/glass pee tank holds 10qts (more than you really want to store between dumpings) and includes carry handle, sealing lid, and float switch to signal near-full condition. Pee funnel I bought from an Etsy dude who 3D prints them.

View attachment 530422
Other features which may or may not ever work as planned: a 'flush' switch which runs an inline blower for some timed interval (2 minutes?). Blower is explosion-proof because burritos. A muffin fan which runs for maybe 30 minutes, or maybe at timed intervals, or maybe hard-wired to the solar PV (??). A super-bright LED strip behind the pee tank which illuminates with the flush button or when the float switch says FULL. You could (hopefully) view pee level thru that oval sight glass.

I had been reluctantly planning a flip-up cover (or Ensolite/vinyl cushion) to make it look more bench-y and less toilet-y, but that was for another person's sensibilities. I'm not especially bothered by it. A simple curtain will give the delusion of privacy. ;)

None of this is hard, or I couldn't do it.:p
Nice setup! Having 3d printed fluid containers previously (a washer fluid bottle for my wife's classic mini), additive manufacturing 3d printing is hit and miss in the waterproof department. Even when there are no leaky seams between layers, I'd be a little wary about the possibility of bacterial growth/smell on residue sitting in the creases between layers. A quick brush of epoxy over the 3d printed part will make it a lot smoother and easier to clean, just a thought!
 

Kris Cringle

Super Anarchist
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3,368
The first season with a composting head was a complete success. Not liveaboards, we spend about 40-50 days and nights onboard.

I used 5 cocoa coir bricks this season. I changed the medium earlier than I had to (I've learned). I could have gotten by with 4. But being new to this, early seemed prudent.

And, I quickly learned, disposing of the contents of the solids bucket was really easy and completely odor free: Bag over the top, invert, tap a few times, replace with freshly prepared coir.

The 'work' was in the liquid tanks. We'd need to take one ashore (our preference vs overboard), on our hikes, and walks, and empty either in the bathroom or onshore. Quick rinse onshore or onboard, cap store to replace the one in use.

Occasionally, a tank rinse with a garden hose and a few drops of dish soap has left the tanks odor free.

Winterizing: Empty last solids, a garden hose rinse with a brush left it clean (no soap). One less gallon of antifreeze is needed. Ready for next season.

IMG_5112.jpeg
 

Panope

Super Anarchist
1,732
936
Port Townsend, WA
After using coconut coir for several seasons and also a season with sawdust (both worked fine), I tried using the decaying leaves from my garden compost pile.
 

Panope

Super Anarchist
1,732
936
Port Townsend, WA
After using coconut coir for several seasons and also a season with sawdust (both worked fine), I tried using the decaying leaves from my garden compost pile.
Continuing post.

.....I dug down into the compost to where the consistency was pretty much like dirt. Had that very aromatic "earthy" smell.

Not sure if it was on account of that earth smell masking other orders, but everyone aboard agreed that the "decaying leaves dirt" was far better than the coir or sawdust.

Steve
 


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