Feb 11 2009
Compost Toilet DIY
As everyone who follows this site knows, we are fairly fanatical about preserving water and composting anything that we can.
Let me ask you a question.
If you owned Chickens, or if you do, would you, or do you, compost their droppings?
You would? You do? So why don’t you compost your own poo and pee?
Urrghh!! It’s nasty I hear you say! Well, get over it. Parents face much nastier things when they are bringing up children. Quite a hands on approach to bodily wastes is involved. So what is so nasty about simply emptying a sawdust covered, non smelling bucket on to the compost heap?
Nothing.
We all have to buy food. We eat it and then, rather than treating the waste as a valuable addition to our soil fertility we give it to the sewage waste system. It’s crazy. We have paid good money for this valuable source of very rich compostable material. Making a compost toilet is very easy and cheap to do. I will not go in to the exact design, with measurements etc as it is so simple you can figure it out yourself.
I will, however cover what you will need and how it is easy to build compost toilets.
Compost Toilet Design
Stop flushing away that compostable goodness, let’s go Compost Toilet DIY crazy! Keep your poo and pee for your compost heap.
What you will need:
- A hinged Toilet Seat. Choose plain white, wooden, etc.
- A sheet of ply-wood
- A bin or bucket with a lid that can be securely fixed
- A few screws
- A few hours of your time!
That’s it. I made ours in no time at all.
How To Build Compost Toilets
As you have seen, to build compost toilets does not need lots of materials. The building of it is very straightforward as well.
Here is how to do it:
Firstly, the Bin that you have purchased should be roughly the same height as your Toilet. You are building around it so it needs to be just below the natural height that you sit on the loo.
Next, depending on where you want it to be or how big you want the surface surrounding the seat to be, you will make a box, oblong etc, to enclose the bin.
Measure the height of the bin and cut the wood for the four sides so they are exactly the same height as the bin. The depth should be just a fraction larger than the length of the Toilet Seat you have purchased.
Use a few odd pieces of wood to strengthen the internal angles of the four sides and screw the open box together.
Now you have an open box with your bucket inside.
Place a piece of wood large enough to cover the open box you have made on the top. Next place the Toilet Seat on top of this where you are going to fix it in place. Lift the top lid of the seat and draw around the hole. Draw again, this time 1 cm outside the line you have already drawn. You want to cut this hole out. Use a drill to make an opening and then use a Jigsaw to cut out the hole.
You now have your box with the bin inside and a lid with the hole in it.
It is now simply a matter of screwing the Toilet Seat on and you have your own Compost Toilet!
It can then be painted, varnished, tiled, or however you want it to look. You may need to tweak a few things as you go but it is fairly straightforward to build.
How To Use Your DIY Compost Toilet
Here is how we use ours. We line the bottom with sawdust but Grass, paper etc is just as good.
Keep a receptacle nearby containing the sawdust and a container that you can use to sprinkle it in to the bin after you have used it.
Some people even make a Compost Toilet that has two holes in the top. One for your compostable poo and pee and the other for the sawdust.
Each time you use the Compost Toilet as you would a normal toilet, you simply sprinkle the sawdust inside to cover everything up. This makes it odourless and you don’t see anything that will put you off going about your business!
When it is starting to get full you simply lift off the removable lid, or lift the hinged lid if you got adventurous, affix the lid to the bin and lift it out.
You then make a decent hole in your compost heap, empty the bin, clean it out with water initially, then with a bit of washing up liquid and water, using a brush specific for the purpose. Sprinkle some sawdust in the bottom and you are good to go again.
I really can’t tell you how good for your soil this will be. To all the men out there, you should be peeing on your Compost Heap anyway. The Nitrogen in your wee is so good for speeding up the rate at which your Compost Heap will start working.
Just think how much water you will save by having spent a few minutes contemplating your Compost Toilet Plans and then putting the final result in to use. Not only that, you will have more Veggies, as when you tell your friends what they grew in they won’t want them! Trust me, people are very funny about this.
Here is what you can tell people who object to using Humanure:
You eat food grown in Horse Shit, Cow Shit, Chicken Shit so get over it!
Sorry about that!
Look, I advise you to read up about the dangers. You can read a whole book about it for free at this address. It is a fantastic resource and if you are anything like me then you will buy the book as well.
I also recommend Liquid Gold. A great book all about the benefits of pee! Do a search on Amazon for it, it’s very cheap. Don’t forget to use our Amazon links below though!
The Humanure Handbook is a total resource and includes proper plans if you can’t get your head around doing it by my instructions. I love the book and it will put your, and your Family’s mind at ease about any of the dangers of composting human poo and urine.
The bottom line about the dangers is this. If your Compost Heap has done it’s job and turned everything to a nice crumbly consistency then it is safe. Once the human poo has been broken down then there is no danger. If you are worried simply leave it a few more months before you use it.
Or, simply wash your hands after you handle your soil.
I hope this has inspired everyone to stop flushing away such a valuable resource. Not only are you wasting water, adding to the sewage problem, increasing your water and sewage rates but your are missing out on a perfect way to improve your soil quality.
One more thing, lets get the word out to everybody. Please use the buttons below and submit it to Twitter and all your other favourite sites. How great would it be if an article about poo was on the front page of Stumbleupon! I am sure they would appreciate it!!!!
Happy pooing!
For a more self sufficient future
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Won’t the humanure need at least a year to decompose and disinfect? Will you need two compost piles then, one for the current year, and one for next year?
Hi Bob, to be honest, if the pile heats up properly it should be fine if it is left for 3 months or so. We start a new pile every 3 to 6 months. We finish one, leave it to do its magic and start on the next.
Some people would rather be extra cautious and leave it a lot longer. I think it is about personal judgement and how much you trust your compost heap!
Are you going to build one?
My first one is only a few weeks old. I’m going to “fill” it until 1 May, then start a 2nd for the “post harvest” till. The first one will be used between 1st & 2nd grows on the 90 days veggies. 2nd grow stalks and then I put veggie remains will go back into the 1st compost barrel. Complicated, but I have it in my head!
Bob, it sounds like you are man with a plan.
Sounds great.
How do you go about toilet paper? Any specific kind to use? or perhaps something else. Do you throw the paper in the bucket too? QUestions, questions
Hi Luis,
We just make sure to have a 100% cellulose toilet paper and throw it in the compost toilet with everything else. So long as its plain old paper with no coatings or scent, there’s no problem.
Is there a problem with flies, especially in summer, on the compost heap or in the toilet? Actually, would it be feasible to have an outhouse over a hole in the ground and have the outhouse move along whenever the hole fills up, and then plant the vegetables directly into the filled in holes?
Hi Derek, No problem with flies and there are lots of flies during the Spanish summertime. Using sawdust to cover the contents of the compost toilet provides a pretty good smell resistant seal. Burying the compost toilet contents in the middle of the compost heap is important or you would get flies for sure. We always make sure there is plenty more ‘ordinary’ garden waste to cover any new smellier additions to the heap.
People do use the ‘hole in the ground’ method, but you’d need to leave it at least a year to break down before incorporating it into your vet plot and it sounds like an awful lot of extra digging to me! Manures of all types break down much more quickly as part of a hot compost heap.
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