Whats the name of a rain water recycling method that is enviromentally conscientous for a large building.?

Question

Doesn't neccesarily have to be safe drinking water as that we could purify once it came through, but just a system that would allow to flush toilets and wash clothes , dishes

Any current website would be a help thank-you

Answer 1

Roof Top rain water harvesting

thnks

Answer 2

bucket

Answer 3

google grey water recycling

it is a good idea to mix tanks so rain water on roof is filtered simply but safely to wash with, etc. through a new set of pipes to loos, bidets and a tap in the kitchen and outside, say to water garden.  All these work by gravity.

Any overflow from a reasonably sized tank is filtered to another, buried, which is then pumped back and only further filtered if needed.  Again there are new pipes to the grey water system.  Water goes to the lower tank under gravity from the bath, washing, etc. and is basic filtered.  

An overflow from the first tank exists to gutter in case of a stoppage or failure.  Similarly to the drains for the second tank, below ground.  

Pumping from the lower tank back to the building as drinking water is not normally done but it could be.  Like most drinking grade filter systems it is dear, but cheaper for a bigger building.  Nevertheless, large use buildings like hospitals are not best reliant on such systems for drinking water.

There is always a problem inserting systems in an existing building and certainly putting a tank on a roof or under a floor, even a garden.  Lots of expensive upheaval.  Otherwise, for new properties, a brief is best to include such ideas as architects, even landscape architects needing water for planned gardens, may  not consider any of this.

Water weighs 10lb a gallon.  There are 6.25 gallons to a cubic foot.  Every loo flush may take 2 gallons.  Even a tank on the roof needs to be big and heavy and the roof may not have been designed to take it.  

A single tree of average size could want 20 gallons of water a day.  It may need 10 a day to keep it alive until it can do better for itself.  Again this is a lot of weight.  To sort out all problems properly do not try to do any significant change to a building or garden yourself.  I, for example, as a Landscape Consultant, may insist on a report from a drainage engineer before planting a woodland garden instead of a lawn.  Always use professionals who will usually be happy to go over whatever ideas you have.    Les.

Answer 4

Yes, it is rainwater harvesting.  This will not supply many of the needs of a large, especially a tall, building.  This water can not go into a potable (drinkable) water system without going through a full purification treatment.  Toilets, yes, washing clothes, iffy, washing dishes, no.

One underutilized system is the harvesting of rainwater in an industrial situation for use in vehicle washing and maintenance.  This water can be recycled and reused, even through periods of low or no rain.