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 Post subject: Water Purification
PostPosted: Thu Sep 08, 2011 11:03 am 
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Joined: Sat Oct 24, 2009 10:24 am
Posts: 663
Location: Porto de Muge, Valada
Does anybody have any experience of putting in a system to purify or at least filter water from a borehole such that it can be used for showers/toilets etc in the house and filling/topping up the pool? We're spending €100 a month on water at the moment...

Cheers, Nick


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PostPosted: Thu Sep 08, 2011 12:22 pm 
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You could try to discuss the matter with the person that deals with water analysis in your Delegação de Saúde. Mine, at Tomar, is very nice: I talked to her because some crooks that managed to sell some rubbish to "clean"the borehole water of some people that work for me.


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PostPosted: Thu Sep 08, 2011 2:31 pm 
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Joined: Sat Jan 21, 2006 10:54 am
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Location: Near the Minho
Most builders merchants/plumber supplies will sell inline filters from the simple mesh ones for in our case irrigation system to more sophisticated resin filters that will purify water to drinkable quality or anywhere in between.
Mesh in a black plastic housing, resin in clear housing.

Our water goes to stop tap then filter then stop tap then distribution valves.
Principles no different for Domestic use all you need to do is to be able to isolate the filter or filters for replacement or maintenance.
Filters are disposable cartridges.

Most of blood analysis clinics also test water.


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 Post subject:
PostPosted: Thu Sep 08, 2011 8:36 pm 
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Joined: Fri Sep 30, 2005 9:30 am
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Location: Portugal
Do you have any kind of cisterna or tank? You don't really need to do anything more than let any suspended material settle out for a while.

Water will then be perfectly useable for pool or domestic use for any purpose other than drinking.

At our place water comes from the borehole with quite a bit of silt (slightly cloudy looking) we let it sit in a cisterna for a few days it it clears perfectly. Every few years we let the cisterna dry out completely and then just shovel up the fine dust.


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 Post subject:
PostPosted: Thu Sep 08, 2011 9:09 pm 
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Joined: Sat Oct 24, 2009 10:24 am
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Location: Porto de Muge, Valada
Well, we do but it's a concrete deposit up on a tower, we use that for watering the garden.

Basically the water has a lot of iron in it, you don't really notice it when you're watering from a hose, but when we tried to use it to fill the pool it was green! It also smells metallic.

I've spoken to two local guys about it. One is our electrician who set up the automatic surface pump (you turn on any tap and the furo pump comes on automatically, it's great actually), all he would say is that we're too close to the Tejo and the water round here is no good. Which I think means he doesn't know but doesn't want to admit it.

The other guy was our pool guy, who thinks himself a bit of a water specialist. From what I could make of his explanation, he would install a 2000L plastic tank, a sand filter, and then some other sort of filter that would treat the water in some way, I couldn't totally understand what he was describing. It all sounded expensive (ie, not hundreds), but then if it saves us €1200 a year it has to be a good investment. I asked him for a quote, but that was about 6 weeks ago and how he seems to have disappeared off the planet.

We do have the furo water piped to the house, so I could switch off the mains and switch on the furo. And then we drink bottled water. But with small children in the house, having baths etc, I don't want to take any risks.

I think as Lobito says get the water analysed and see how bad it actually is.

Okay that'e enough. Time for a beer!

Cheers, Nick


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PostPosted: Thu Sep 08, 2011 9:39 pm 
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Location: Portugal
Does the water have iron (rust) in it because the pipes between the borehole pump and the surface are corroding or is there another reason ? It could be time to pull the pump up and do some checks.

Do neighbours with boreholes have the same problem ? You are probably getting your water from more or less the same aquifer


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PostPosted: Fri Sep 09, 2011 7:14 am 
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Joined: Sat Jan 21, 2006 10:54 am
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Location: Near the Minho
If you fill a litre bottle and let it settle you'll be able to see what's in suspension.
take a litre bottle to Analysis clinic they'll give you a health check
then you can decide on levels of settlement or filtration that might be required for house use.

It seems pointless following your pool mans advice if you can install one system that would cover house and pool.

Do the basic checks first, especially MrBife's borehole pipes and neighbours.


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 Post subject:
PostPosted: Sat Sep 10, 2011 11:23 pm 
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Joined: Fri Jan 22, 2010 7:13 pm
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Location: S.B. Messines (Perna seca)
I've heard that it's quite common for the water from boreholes to contain iron, & the pool water to go green (it happened to one of my neighbours).

Mine is from a very large well, with no cover, & hasn't even been cleaned as you'd need a full on scuba diver to go down there -more than 5m of water even in midsummer. I have a filter with changable cartridge (bought from Leroy Merlin, 15€) & the water is perfectly clear, filter gets filthy though. However, I obviously don't drink it, & don't cook with it, I do shower & wash dishes in it though, so am a little worried.

Please could someone tell me how I go about finding my nearest analysis clinic, & how much it costs to have your water analysed. Thanks

_________________
PLEASE consider if you could possibly make room in you life for one of Portugal's stay or rescued cats/dogs...just one/one more!


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 Post subject:
PostPosted: Sun Sep 11, 2011 7:10 am 
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Joined: Sat Jan 21, 2006 10:54 am
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Location: Near the Minho
Human Blood Analysis clinic :) (análises clinicas) should be some in your nearest town.
Take sample in a 1.5lr bottle cost around €60


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PostPosted: Sun Sep 11, 2011 9:12 am 
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Joined: Fri Feb 10, 2006 11:33 pm
Posts: 1592
Location: Quintela, Tabua
Our local clinic does it also. You can have either an analysis for bacteria, or a full chemical anlysis which costs more.

But they ask you to collect the water in one of their own (sterile) bottles, and to fill it from a tap as close to the well as possible.

They also ask how deep the well is and when the water was collected. I assume that the latter is important as bacteria may multiply when exposed to light.

Alan


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