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around 80% of the ‘non- wholesome’ (non-potable) water requirements of two people.
In industry however the situation is somewhat different because there tends to be a much higher potential usage of what might be termed ‘raw water’ in industrial applications and processes. In such non- domestic applications, the use of non-potable water in the workplace is often in excess of 90%, or around 25 l/person/day whilst at work. It would appear, according to some sources, that this whole requirement could be met by harvested rainwater, even in the relatively dry south-east of England, whenever the ratio of roof area to workforce is greater than 10 m2 per person. Even when the ratio is less, the savings on the use of mains-water would remain substantial.
Whatever the situation it is fairly obvious that rainwater harvesting offers considerable cost savings once installed.
Of course the means to recycle the largest potential supply of water is the water output from Water Company sewage plants and other water treatment facilities that may be independently operated by individual companies or organisations simply comes down to pipelines and pumps more or less because all of the necessary treatment has been completed in the treatment plant itself. So where does this all leave us?
WHERE TO NOW
As with all of these various of options it is now down to those that lead and those that hold the ability to push forward or legislate where necessary to get the water we all hold so dear (both emotionally and financially) used and reused in a way that will allow the ever expanding human population to avoid
14 drain TRADER | April 2018 | global water poverty.
In cinemas we increasingly see film makers showing what may be in store if we do not utilise our precious resources more effectively and more importantly sensibly for the sake of all people (fiction I know but often there is more truth in fiction than we like to think). The one I have not yet seen is the one that someone somewhere must be writing about the global rebellion that arises when the general population finds out that we will soon be running out of drinking water because someone want to make money from the problem!
Yet it seems that at least for now this is something that can be avoided quite easily by recycling wastewater from whatever source it is gathered. Water charities often shout loudly about the numbers of new wells they are providing in drought- stricken/water poor areas that provide badly needed water supplies to the local population, but rarely do we see that they have also installed suitable sanitary facilities for those villages and towns that will feed recycling plants that will take the newly sourced and once-used water and pass it back into the population after treatment, it simply gets dumped back into the local water course/environment and lost back to nature.
In more developed countries, we do not yet have (for example in the UK) a planning process that ‘requires’ developers to include in new developments rainwater collection systems, either by individual property or through district collection, that will feed a separate raw water system that would feed numerous properties in an area with supplies for flushing of toilets or garden watering that will negate the need to use expensive, treated drinking water for such purposes.
Yes, there is the requirement that developers include Sustainable Drainage installations on developments but these are generally designed to manage rainwater/storm run-off to prevent flooding downstream rather than recycle the water for practical use and so does not in general answer the need for reusing water for more useful purposes.
There will of course be and are innumerable reasons why this is the case. The primary reason of course will likely be cost.
Charities can only do so much with the donations they get and so provide new hopefully uncontaminated water sources by way of wells. Developers will argue that adding new water pipe networks for the use of raw water, rainwater collection
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