RE: How to recycle rain water for use at home
The system previewed would only be economically feasible if it included all household use of water (but isn't anywhere near large enough) - and then might be questionably economically feasible for some areas using good quality ground water. There is a huge amount of good quality information available on rain water usage from all over the world - this isn't rocket science and it has been researched for many years. Your "designers" would have benefited greatly by doing a little more homework before starting. BTW UV doesn't kill all the bacteria, just a high portion and it requires frequent maintenance to maintain even partial efficiency. In addition most laundry detergents are going to be as, or nearly as efficient for killing single cell organisms as UV.
