Tilsætning af mineraler til omvendt osmose vand

[SuneZA]

Så er der sendt et par PM'er afsted og jeg svarer lige her også

Det lyder til at der bliver brugt lidt forskellige "opskrifter", hvilket bare gør det endnu mere spændende at finde den rette blanding.

Jeg laver selv mit RO vand og der bliver ikke tilføjet mineraler efter filteringen - Ved en TDS måling går jeg fra ca. 400 i mit hanevand til ca. 9 i mit RO vand.
Jeg har selv testet lidt på det og både GH og KH er helt i bund, så det skulle være helt okay at regne fra næsten 0.

Hvilket RO system har du?

Sendt fra min HUAWEI VNS-L31 med Tapatalk

[Callesen]

Jeg bruger følgende:

http://rent-postevand.dk/shop/Omvendt-osmose/3trins-osmoseanleg?product_id=904

Fungerer ganske fint og vil klart anbefale et anlæg med pumpe for at sikre et højt nok tryk til filteret.

[Alexpid]

Lidt input fra youtube

https://youtu.be/iHI7jC0sQZo

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[Callesen]

Også det mix jeg pt. bruger - Har fået noget Calcium Citrat hjem, men har problemer med at få det opløst i vandet.

[Benjoh]

Hej David og Casper,

Jeg er også bosiddende i København og overvejer et RO fra Rent Postevand. Har I en booster pumpe på? Bor på 2. sal og ved ikke helt om et af de "nye" anlæg kan trække det :/

[malling]

Tilsætning af mineraler til omvendt osmose vand

Du skal have booster pumpe på, trykket er ikke kraftigt nok hvis du som de fleste i kbh bor i en ældre lejlighed.

Amazon har utal af systemer med og uden booster pumpe

[Kjeldsen]

Også det mix jeg pt. bruger - Har fået noget Calcium Citrat hjem, men har problemer med at få det opløst i vandet.

Jeg har ikke selv prøvet citrater men det er bl.a. det Third Wave bruger så det undrer mig lidt at det skulle være svært at opløse. Har du bundfald eller hvad? Hvis du har en sodastream kan du forsøge at opløse citratet I en syreholdig opløsning.

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[mathies]

Nogle som erfaringer med, at køre RO-vandet igennem dette filter: http://rent-postevand.dk/shop/Basisk...IMRO_2_AMC0404

?

[Kjeldsen]

Nogle som erfaringer med, at køre RO-vandet igennem dette filter: http://rent-postevand.dk/shop/Basisk...IMRO_2_AMC0404

?

Har ikke direkte erfaring med det filter, men du kommer til at mangle karbonat hårdhed derudover. Det kan godt være at du skal lege med din bypass valve og lukke lidt af "Spildevandet" tilbage også

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[mathies]

Tak for feedback, det er da heldigvis til at måle sig ud af

[the_partisan]

I've had excellent results with Third Wave Water and using it on RO water bought from the local aquarium shop, costs 2kr / L. Unfortunately the single pack I ordered ended up being rather costly because it got stuck in customs and had to pay the "expedition" fee of 160kr. Maybe a group buy next time?

The water has TDS of 145ppm and no carbonate hardness (measured with BWT kit). I find that it brings a lot of flavour clarity. They use some very low solubility components in their mix so it sounds like it would be quite a hassle to measure those accurately to replicate it at home.

It would be nice to be able to make RO/distilled water home rather than carrying water around, but it's hard for me to justify the cost/hassle of installing such a system. Maybe a water distiller? But they also seem bulky and noisy.

[the_partisan]

Finally I gave up and bought a RO system for home, from this shop here:

http://rent-postevand.dk/shop/Vandfilter/Omvendt-osmose/Mars125ULP

It's the Jozzon 125GPD low pressure membrane. This membrane should work without a pump. Rather peculiar owner of the webshop, but the service was OK and he answered questions. Membrane should last around 3 years.

I measured the water pressure in the shower to be around 2.5 bar using the manometer you can "borrow" from the site. The unit was relatively straightforward to put together and I intended to connect to it to shower when I need, and put it away at other times. It's fairly compact, though does retain some water so tends to spill around after you disconnect it, need some end caps to seal of the input/output when not in use.

After setting it up it was taking me around 7 minutes to get 1L of water out, at the coldest setting (15-16C) in the tap. Supposed to be better at 25C. After running for around 30min I already had 5L.

TDS is measured to be 20ppm, and total hardness and carbonate hardness was <1 degrees using the BWT test kit, and the same as the RO water I used to get from the aquarium shop.

Might be useful if you're looking for a rather cheap and not too inconvenient solution. Even without any minerals added it does seem to produce a better brew than tap water or bottled water.

[malling]

You can just add 1/3-1/4 of tap water to get decent water, if you don’t want to mess around with minerals.

It ain’t perfect and not nearly as good as adding minerals, but it’s allot more convenient.

I do it when i’m in a hurry or to lazy to bother.

[the_partisan]

I can actually enjoy quite a lot coffee brewed with just RO water, sometimes it can be very acidic though and then needs some buffer. It mostly seems down to how it was roasted..

[Hegnet]

I can actually enjoy quite a lot coffee brewed with just RO water, sometimes it can be very acidic though and then needs some buffer. It mostly seems down to how it was roasted..

Thank you for the update on the lightweight RO setup. You and others have now piqued my interest in the process of designing water for coffee. I look forward to hearing more about your experience with this system.

Regarding the quoted post: perhaps this is a good occasion to stress to newcomers that pure RO water (i.e. without a remineralizing “filter” or the addition of a solution containing dissolved minerals) is considered aggressive, both to equipment (RO corrosion) and perhaps to your body (washes out the body’s minerals). Don’t use pure RO water in an espresso machine.