I’m going to be watching this one with interest, as we have the same issues here in South Africa. I’m told that recycling the water is a tricky issue, as there are vitriolic acids (or something like that – their name eludes me right now) and residues which can only be removed with Reverse Osmosis. Even if you do use R.O. on the water, the resulting spoil from the R.O. unit will be concentrated waste which is essentially industrial waste and would need to be handled as such. I will do some hunting around locally and on the net, but look forward to any other ideas the forum may have.