Here is another cool concept for you, one that may help recycle used water that most of use when we hit the showers. The whole thing is called the EcoCool System, something that turns used water into something many may need in the form of air coolers.
Apparently, bathing in water and all that used water normally goes down the drain. However with the EcoCool System, it collects the used water into a 30 liter reservoir which comes equipped with a ceramic depth filter.
Once the filtering process is done, the filtered water is then sent on to a 15 liter tank which afterwards sent to a set of tubular tiles which eventually decreases in temperature and becomes the reason behind the air cooler for another useful phase.