Clayton Tharp wrote:1) a woman I know has a composting toilet, it is a small outhouse building, she puts a 5 gallon plastic bucket below the seat and when used she covers the poop with sawdust because it absorbs moisture. I've read that absorbing the moisture prevents bad odors. The bucket was 1-1.5 m. below the seat. She has a door on the other side of the building that she can open to remove the bucket. She created a compost pile, but said that she would not use the compost for one year, so it would be free of pathogens. I have heard of using wood ash, but I don't think it works as well as sawdust. We have lots of sawmills around so it is easy to get sawdust. If you cannot get sawdust, I would maybe try soil that is easy to get, or maybe even sand, dry leaves, shredded paper (?). Important to have different compost piles and keep track of dates when last added to. 2) I cannot poop on top of some else's poop, can't do it. When in the country without toilet or without privy (outdoor compost toilet) I try to dig as deep as I can with a stick or rock, poop there and cover with lots of leaves and rocks, maybe you did this when you were nomadic. I think it could work if you have plenty of land and a system to identify where someone has pooped, crossed sticks, rocks in a circle, piece of cloth, etc. Please give Portugal a kiss from me. Cheers, Clayton
Sawdust absorbs moisture, it is also
carbon rich so it composts well with nitrogen rich stuff such as faeces and
urine (I find it isn't usually necessary to separate urine), but some people disagree. I think it might depend on your climate. 1 year is a little short. Nothing really nasty (cholera, typhoid, salmonella) will survive that length of time in hot compost, but threadworm eggs can live up to 18 months. I wait 18 months to two years to be on the safe side. We are all pioneering and promoting these kinds of technologies, so that other people will adopt them in future, if we make mistakes we will give the technology a bad name, so IMO a little extra caution isn't a bad thing.
A friend of mine experimented and found
straw was the best thing (probably because of the air in it), followed by sawdust (no treated
wood and if you can get vegetable based oil for your chainsaw so much the better). Autumn leaf litter will do. Avoid using hay, it's generally too nitrogen rich unless cut very late. I guess shredded paper could work. I get cheap recycled, unbleached toilet paper and it seems to compost fine. Jewel beetles seem to do most of the breakdown, they thrive in our toilet! Redworms or earthworms might help too. Watch out for coloured paper. In Europe newsprint is supposed to only use biodegradeable vegetable dyes, but the ingredients in glossy paper apparently remain a trade secret. I don't want to reopen the debate about toxicity of
cardboard. You can find that elsewhere on permies. Sand or soil would keep flies away but it wouldn't encourage the kind of hot composting you want.
I would strongly advise against using wood ash in a composting toilet. Someone will sooner or later try to pursuade you to use it, often on the grounds that "it's what they do in India" (no comment
). Ash sterilises, and stops the composting process. The mixture becomes anaerobic. I don't know how long it would take for ash-poo mixture to break down and become safe to handle, probably a very long time. It's almost like a way to preserve faeces. Not nice. Also, consider that fire ash is rarely just wood ash. I try very hard to ensure that fires at my place are untreated wood only, or at least to keep suspect stuff to one stove only so the ash can be disposed of separately, but many people are accustomed to burning all kinds of rubbish, plastics, vulcanised rubber, lead wicked candles etc. and extremely reluctant to change the habits of a lifetime (or incapable of lighting a fire without toxic stuff). One guy I met wanted to burn an old smoke detector on the grounds that one of the components was slightly radioactive (true), and burning it would make the radioactivity go away (not true).
Anyway back to the original question. Cultural issues are the hardest thing about compost toilets. I agree with Cristo's arguments. I'm guessing is that these people aren't particularly fecophobic, and aren't going to be getting a flushing lavatory any time soon, so that's half the battle won (although after a year or two of treading in faeces, they may resort to such desperate innovations. The voices calling for composting toilets are quiet compared to those of the flushing toilet lobby). Compost toilets done properly are both hygienic and cheap, and I would emphasise that side of the argument. Also consider the children who are going to be at risk of hookworms, threadworms and worse things. I would ignore the $1030 dollar option. I doubt it's appropriate in this situation.
I went to a rainbow gathering where some of the people believed in pooping anywhere they liked in little holes in the ground because "it would break down in a week or so". They were a small minority, but I blame them for the typhoid which I caught. One thing when you are travelling around, but too many people and it's a no no.
A few people in one place for a long time with no toilet will find the most accessible places get used first and then you have to walk through these places to get somewhere new....This means walking through big patches of vigorously growing stinging
nettles and thistles with faeces hidden in them to find somewhere new to squat down because stinging
nettles are nitrophiles which love growing on human urine and faeces. A contained toilet reduces these problems considerably. Wonderful multipurpose plants nettles may be, harvesting them is a lot easier and more hygienic if they aren't surrounded by fresh bodily wastes. I don't know if they plan on
gardening or growing anything, but here again a bit or order would help.
In China and much of the far east babies mostly don't wear nappies and are allowed to poop anywhere. The solution in this instance is little dogs which eat the poo and later get eaten themselves. Some anthropologists think this is one of the reasons why humans domesticated dogs in the first place. It's not my preferred solution....yuk