Ever since the invention of the flushing toilet in 1596, the human race has been recklessly wasting a hugely important resource and contaminating our oceans with the same. Now, at last, the technology is available for each and everyone of us to compost our faeces and get them transported to our local organic farm for recycling into valuable fertiliser and soil improver. Now is the time for us all to 'close the loop' and build composting toilets - knock down your garage and build a toilet instead. Don't feed the crabs - return the minerals and nutrients back to the land!
We ourselves have been defecating in an outside toilet here for 5 years and, yes ...... there have been problems!
The original design was really simple - a garden shed perched over the top of a 1,000 litre IBC, which worked really well except it filled up too quickly and was then extremely awkward to move from beneath the shed.
Version V1.02 is a significant upgrade from the previous design and needs to cater for 5 permanent residents and dozens of summertime visitors, so the system of removing the IBCs must be improved. In this design the IBCs can be easily removed without damaging/demolishing the shed.
Composting toilets are a really great idea as long as they can be emptied easily without getting oneself covered in human faeces during the process. Whatever container the faeces end up in, that container needs to be able to keep the waste from contaminating the environment and be able to be easily transported. The great beauty about IBCs is that they are almost purposely designed for exactly this kind of job - they are water tight, easy to transport and once away from the dwelling can be left in the corner of a field to 'mature' into useable compost.
Version 1.02 will have the same 'shed above a tank' principle, but will have a large, flat and smooth concrete pad at ground level on which the IBCs will be made to slide backwards and forwards. If this sounds a bit wacko, then read on:
When the IBCs are empty, they are fairly light weight and can be rolled and pushed around on smooth concrete by one person alone. When they are full, they can still be slid around, but require a tractor to do so. If, for example, there is a full IBC at the back of the structure, it should, in theory, be able to slide forwards by means of chains attached to the tractor as long as the concrete slab is built properly.
Everything is dependant on the slab: It must be smooth, flat, slippery and strong. Slippery? How do we make concrete slippery? Answer: oil.
You may think that this design is a bit risky, being dependant on a full IBC slip sliding along a concrete slab, but, in a previous lifetime I worked in places where full IBCs were actually deliberately pushed along slippery, oily, concrete floors by fork lift trucks - so I know for a fact that it can be done.