Rainwater harvesting

Work concerning plumbing or sanitary water (hot, cold, clean or used). Management, access and use of water at home: drilling, pumping, wells, distribution network, treatment, sanitation, rainwater recovery. Recovery, filtration, depollution, storage processes. Repair of water pumps. Manage, use and save water, desalination and desalination, pollution and water ...
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Did67
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Re: Recovery of rainwater




by Did67 » 21/05/16, 22:21

The ideal is to know where they come from (or where the seller works!). For example, choose an agro-food factory. Except the lubricant of the generator, in principle it is "food" ... The risk very limited.
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Obamot
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Re: Recovery of rainwater




by Obamot » 22/05/16, 00:37

Bea wrote:The legislation requires a water tank for new construction. As much as it serves something, right?

The water in the distribution network is increasingly polluted.

In a few years rainwater (from tank) will be the cleanest water we can have at a reasonable price as much to know. It is still necessary to use it and properly build its tank.

Regarding the tank:
build it in guaranteed [...] concrete without additives. Not PVC. The water must have a neutral pH 6,5 to 8,5. Logically, the more acidic the water, the more quickly it will take on the lime from your concrete. In doing so, the pH of the water will become more basic and stabilize favorably

No, it is inaccurate, the best water for all is water with a PH of 5,5 (it is water assimilable by everyone, from infants to elderly people without problem). Nature being well done, meteorite water (or rainwater not having fallen on a roof) naturally has a pH between 3 and 5 and it would be better to conserve ... To do this, the type must be roof cover does not change this PH, the rainwater thus recovered by runoff is to be stored in an adequate environment to preserve the PH. A neutral pH roof is therefore not indicated, because the water will lose its very slight natural acidity, the one that suits us all. Ditto for making a suitable concrete (it would require a concrete whose aggregates, sands and stones of different particle sizes, have been selected according to their osmotic PH which would remain around the ideal value PH6 or concrete not producing calcium, which seems difficult to me (lol) or failing to coat the tank with ceramic tiles), in order to obtain and keep a slightly acidic pH and not neutral, or store in something else than concrete, but with the same PH preservation constraint.

In addition, meteorite water at pH 5,5 (coming from its natural CO2 content present in the atmosphere) has another advantage and not the least, it is not mineralized - therefore, it has a very high electrical resistivity with small molecules - it is then the ideal drink to purify the organism, because it will easily penetrate the cells (whereas with mineral water with low resistivity, the cells are close to short-circuiting. ..) rainwater (which it is recommended to filter with a reverse osmosis system) is therefore very favorable for eliminating toxins from the body. Because the quality of the water is not to be checked in relation to what it brings to the body, but in relation to what it allows to eliminate ... (Drink mineral water "because they would be good for health " is an urban legend, because the minerals they contain are not "bioavailable", they will therefore be eliminated in the urine ...)

Source: Pr. Marc HENRY: Professor of chemistry and quantum physics. University of Strasbourg and researcher at CNRS.
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Re: Recovery of rainwater




by izentrop » 22/05/16, 09:33

Hello,
Did67 wrote:Now you have to see the use of water: watering, washing, WC, etc ...

For watering, if they are outside it is better to empty them before winter, with the risk of running out of water at the first sowing and for the translucents, protect them from the rays of the sun so that the algae s 'develop there.

I put 3 X 1000 l in my cellar like that, plus the problem with the gel and the algae. A pump brings the water back to the garden.

Those linked to collective sanitation have an interest in declaring them https://www.service-public.fr/particuli ... its/F31481 otherwise :x
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Re: Recovery of rainwater




by Ahmed » 25/05/16, 10:16

On the site you cite (sic), it is specified here that rainwater is not drinkable because it is chemically contaminated ... : roll:
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Re: Recovery of rainwater




by izentrop » 25/05/16, 10:32

Ahmed wrote:On the site you cite (sic), it is specified here that rainwater is not drinkable because it is chemically contaminated ... : roll:
Why this : roll: ?
It is full of spores, insect eggs, algae, various dust, roofing residue, pigeon droppings, zinc, copper in some cases, bacteria, viruses ...
She asks for reprocessing before being drinkable, right?
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Re: Recovery of rainwater




by chatelot16 » 25/05/16, 13:32

and tap water do you think is chemically pure? its only advantage is that chlorine has killed there which is the most dangerous

various dust pollen and spore sse quickly separate by simple settling, provided that the level of impurity is sufficiently low not to feed large putrefaction

to obtain sufficient purity I avoid sending the water from the first rain to the clean tank ... I wait until the roof is rinsed ... this first rain is sent to another tank for use n ' not needing pure water
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Re: Recovery of rainwater




by Obamot » 25/05/16, 15:06

Ahmed wrote:On the site you cite (sic), it is specified here that rainwater is not drinkable because it is chemically contaminated ... : roll:

Yes, oh, I'm not the only one who noticed it ....

Good remark therefore, I said elsewhere (above) that this recovered water should be filtered by a reverse osmosis process. Who already tried ?
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Re: Recovery of rainwater




by izentrop » 25/05/16, 17:30

chatelot16 wrote:to obtain sufficient purity I avoid sending the water from the first rain to the clean tank ... I wait until the roof is rinsed ... this first rain is sent to another tank for use n ' not needing pure water
What system do you use to make it drinkable?
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Re: Recovery of rainwater




by chatelot16 » 25/05/16, 19:56

I only count on decantation and the right choice of days when I recover the rain ... when the tank is full I disconnect the hose so as not to introduce more water to concentrate the dirt and bring food to the bacterium

when a 300 liter container was filled with rain it is a little cloudy, but the next day it is perfectly clear and it keeps indefinitely if it is in the dark and you do not stir the bottom

when I want to clean one of the 300 liter tanks I close the taps of the others so that the house pump in vacuum only one, when it is almost empty I use the 10 liters of water which remain to clean it ... it's almost black ink by rubbing the wall and the bottom with a brush ... I have the impression that the deposit that formed has consumed all the organic matter in the water

I happened to let grow brambles which one invaded a gutter and a part of roofing: the collected water was not good any more: I used tanks of 300 liters which was in reserve since I do not know how much year and that were perfectly clear ... this relief stock allowed me to not run out of water while I cut the brambles and clean up what it takes

another remark that I can't explain: when the rainwater fills a tank, the next day it's decanted and clear ... but if I stir everything, it doesn't decant anymore, it stays cloudy for weeks

it is therefore important not to concentrate the flow of all roofs in a single tank so that each time it rains it stirs everything ... I prefer a 300 liter tank for each roof
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Re: Recovery of rainwater




by izentrop » 25/05/16, 20:54

Pure water to your taste but not drinkable.
chatelot16 wrote:it keeps indefinitely if it's in the dark and you don't stir the bottom
Darkness is not enough, you also need a temperature not too high otherwise the bacteria will develop, you can smell it. The tanks in my cellar do not have this problem, but I have a 500 l outside which is airtight, under a building, made of dark green plastic.
Water does not see light, but in summer it smells bad. Must say that I do not clean it, it is only used for watering.
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