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Old 10-30-2016, 06:54 PM   #11
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Quote:
Originally Posted by milkmania View Post
1) so you just divert #1 one direction into a catch tank, honey wagon, etc...
Then you divert #2 to a container under the seat, cover with a layer of sawdust and let it dry/decompose naturally... Correct?

2) hardwood sawdust? Pine sawdust? Hamster bedding sawdust? Horse stall sawdust? Cabinet shop sawdust?

I'm thinking, I have an extra Atwood 12v bilge exhaust for my boat on the shelf...
If I build my commode cabinet right and with the exhaust... I could flip a switch and exhaust any 'fumes' out the top of the bus through a steel covered vent cap.


Great pic!

Perfect illustration of what I have done.

1) Yes. You have it right on. As I don't currently have a compost pile I dispose of the "compost" material in an approved garbage receptacle.

2) I am currently using cabinet sawdust. I have tried coco from the garden store. Some people love it. I didn't. I have heard from others who have used both hardwood and softwood sawdust from a sawmill. It is an the coarse side compared to what I am using but I hear good reports.

One to avoid: Cedar. I would have thought that cedar would be a good choice but I have heard from two others who tried it and found that it was not as absorbent and did not control odor as well.

I had planned on installing an exhaust fan wired to the bathroom light but have found that, so far, it doesn't need it.

Another minor detail. I use small can liners in mine so that the collection bin/bucket stays clean. I have heard from others who do not and they don't have any big issue with a soiled bucket. Some are also lining the bucket with newspaper. I don't think that I am going to try that one.
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Old 10-30-2016, 07:08 PM   #12
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One thing... I have such a hyper-sensitive gag reflex, I am forced to use nitrous oxide at the dentist's office.... JUST FOR BITE-WING X-RAYS

Tried it once without nitrous... Technician saw my cookies
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Old 10-30-2016, 07:20 PM   #13
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I get these regularly in white (not clear)...
I've already got three of them, so I'm figuring I'll incorporate one of them somehow for #1 tanks

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Old 10-30-2016, 11:14 PM   #14
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I built a composting toilet. Kinda got carried away actually. The idea of spending a grand on a plastic bowl with a crank irked me so I, er, overdesigned it a bit...

https://drive.google.com/open?id=0B3...jV3SnF2c3l0UEE

https://drive.google.com/open?id=0B3...ThFcXFYd250RTA

https://drive.google.com/open?id=0B3...klBTkpZdWM3NjA

https://drive.google.com/open?id=0B3...Ut6MmtkYVkzbU0

https://drive.google.com/open?id=0B3...VBmb1BwYzZRc1k

I know I got carried away. I figured if I was gonna get my wife to use it it was gonna have to crank itself. So I motorized it and put in a timer. Press a button and close the lid. A few seconds later the motor comes on and stirs things a bit, effectively covering it up and mixing it in. There is a small computer fan built in to the wall behind the toilet drawing air across it and out through a pvc pipe through the roof. This holds down the smells (if any) and removes excess moisture. The motor keeps it aerated for aerobic bacteria. The motor is pretty small but I think it will last a while geared down the way it is. I hate the noise but it seems to work. I have sawdust in it but will add coconut choir. The choir is darker and will likely aid in appearance during use if you get what I mean.

I added a switch that will assure the motor stops with the tines horizontal and out of the way each time.

The urine is diverted to a greywater tank. With just the two of us using it for camping I think we can probably go a month or better with regular use before dumping the solids. I haven't placed it in service yet as I am still completing my build. The inside wood is lined with resin and fiberglass for waterproofing and durability.

I hope it works. It fits the bath nicely.

Ross
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Old 10-30-2016, 11:26 PM   #15
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Quote:
Originally Posted by rossfree View Post
The idea of spending a grand on a plastic bowl with a crank irked me so I, er, overdesigned it a bit...
I know, right? Nearly $1000 is ludicrous when you can DIY something for a tenth of that that will work just as well. Well yours might be closer to 200 with the motor and gearing..... but still.

Keep us posted on how it works out!
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Old 10-30-2016, 11:53 PM   #16
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you can create an open air vent that is always venting like steampunk Steve did. essentially he created a fume stack and tested with smoke/fog machine to verify that the fumes naturally rise out of the stack. its what i plan to make myself.
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Old 10-31-2016, 01:15 AM   #17
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what is the big draw to composting toilets? I hear people at the marina using them as well. I just don't get it? A black tank is pretty simple and the world is set up for it.
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Old 10-31-2016, 02:12 AM   #18
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Wink

Quote:
Originally Posted by rossfree View Post
I built a composting toilet. Kinda got carried away actually. The idea of spending a grand on a plastic bowl with a crank irked me so I, er, overdesigned it a bit...

https://drive.google.com/open?id=0B3...jV3SnF2c3l0UEE

https://drive.google.com/open?id=0B3...ThFcXFYd250RTA

https://drive.google.com/open?id=0B3...klBTkpZdWM3NjA

https://drive.google.com/open?id=0B3...Ut6MmtkYVkzbU0

https://drive.google.com/open?id=0B3...VBmb1BwYzZRc1k

I know I got carried away. I figured if I was gonna get my wife to use it it was gonna have to crank itself. So I motorized it and put in a timer. Press a button and close the lid. A few seconds later the motor comes on and stirs things a bit, effectively covering it up and mixing it in. There is a small computer fan built in to the wall behind the toilet drawing air across it and out through a pvc pipe through the roof. This holds down the smells (if any) and removes excess moisture. The motor keeps it aerated for aerobic bacteria. The motor is pretty small but I think it will last a while geared down the way it is. I hate the noise but it seems to work. I have sawdust in it but will add coconut choir. The choir is darker and will likely aid in appearance during use if you get what I mean.

I added a switch that will assure the motor stops with the tines horizontal and out of the way each time.

The urine is diverted to a greywater tank. With just the two of us using it for camping I think we can probably go a month or better with regular use before dumping the solids. I haven't placed it in service yet as I am still completing my build. The inside wood is lined with resin and fiberglass for waterproofing and durability.

I hope it works. It fits the bath nicely.

Ross
I think I'm too old for that toilet ... My buddies hang too low, and if I accidentally hit the button I'd get pulled in.


Ok, seriously that's a pretty cool design
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Old 10-31-2016, 02:21 AM   #19
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Quote:
Originally Posted by Geo Jeff View Post
what is the big draw to composting toilets? I hear people at the marina using them as well. I just don't get it? A black tank is pretty simple and the world is set up for it.
My biggest draw is:
1) not have to install black water tank
2) not have to empty black water tank
3) not have to unclog black water tank
4) not have to repair black water tank pluming or components
5) not have to buy and install Thetford style water toilet.
6) not have to buy 'special fast dissolving toilet paper'
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Old 10-31-2016, 03:45 AM   #20
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Black water system is ok, when it works. It's when it doesn't.... well let's just say that's a VERY $#!++y job trying to fix it.

Composting toilet..... pluck a bag out of a bucket (or dump the bucket into a bag) and toss it in an approved waste container, in its simplest form. There are those who stay in one place who actually compost it and use it as fertilizer... which is sort of the whole point. But if you move around a lot and don't have a flower garden...
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