Topic of Interest
There is a saying: "desperate times calls for desperate measures". With the current drought desperate measures are needed. Some of the things that I list below might sound silly to those who have water, but to those who don't it might just make a difference.
Collecting rain water is often seen as "not worth it", especially in low rain fall areas. This is exactly where it is needed. Remember that 1 square metre of roof space collects one litre of water for every millimetre of rain that falls. Over Christmas we had 0.7mm of rain in Vanrhynsdorp (winter rain fall, semi-desert region) and a few days later another 2mm. This was of no value for farming or gardening, but with a total roof area of +-300 square metres, I could collect 810 litres of water. Add condensation from fog and dew and this figure might increase surprisingly.
It is also said that it is acceptable for a geyser so shed up to a litre of water per day. This water is wasted through the pressure regulating valve, to protect the geyser from being over pressurised when the water is heated. One litre seems negligible, but how many geysers do we have in the country? This is pure drinking water that can be collected.
Modern fridges and freezers (cold rooms as well) are "frost free". That means that every so often the unit goes into a defrost mode, thus melting the ice inside and it runs off onto the motor of the unit, where the heat of the motor evaporates the water. This is clean, pure water. Air conditioners do the same. This condensate is often wasted on hard landscaping, where it evaporates. It can be harvested (desperate measures).
By collecting all these "bits of water", you might be surprised how soon it adds up (3lt per day x 30 days = 90 litres per month).
The days of chlorine and salt water pools are numbered. Backwash water is either wasted to storm water (in which instance it pollutes our natural resources) or the (often overloaded or non-functioning) municipal sewers. If you have a natural pool or if the pool water is treated with UV, the backwash is safe for re-use in the garden or toilet flushing. The water can even be treated to potable standard. Your pool can become a reservoir with very little change.UV Water Treatment video
Organic Waste Water is not "waste". It is an asset. Your black and grey water can be treated on site, using only 60 watts of power, and re-used for toilet flushing, keeping a few trees alive or other non-potable water applications. Yes, you might have to do some plumbing changes to flush your toilet with treated water, but at least then you can use your toilet. It also saves on demand for potable water. This is a once-off investment, as is the pool system and collecting rain water, but it will save you money and will save water for the rest of your life.On-site waste water treatment case studies
For those in the cities that are connected to municipal sewer systems, treating grey water for toilet flushing and other non-potable means might be an option. It is cheaper than treating black water as well, but you do not get 100% recovery of your water (as is the case with the Waste Water Treatment Plant). After years of research we now have the answer to effectively treat grey water so that debris does not clog your pump and there are no bad odours.
The current water situation calls for desperate measures. We will help where we can.
We are also working on a system to purify non-potable water by using the sun (not solar-powered).