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Pro­duc­ing large amounts of blackwater

  • Jacob
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7 years 4 months ago 7 years 4 months ago #2284 by Jacob
Is it pos­si­ble to fill a con­tainer with tap water and run some kind of a fil­ter inside of it to remove the hard­ness, instead of using an r/​o fil­ter attached to the tap? I know peat fil­tra­tion low­ers the hard­ness, if you run it long enough can it remove all the hard­ness like an r/​o fil­ter would? There is r/​o water I can buy from a fish store but they’re say­ing it usu­ally has a tds of around 200. It’s sup­posed to be closer to zero for black­wa­ter, I thought.
From my tap the “in” read­ing on my r/​o fil­ter tds meter is 89.
Last edit: 7 years 4 months ago by Jacob.

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7 years 4 months ago #2286 by Lit­tle
Replied by Lit­tle on topic Pro­duc­ing large amounts of black­wa­ter
There are key dif­fer­ences between reverse osmo­sis and fil­tra­tion. Reverse osmo­sis removes the salts and other efflu­ent mate­ri­als from the water mol­e­cules. That will not hap­pen with just a plain fil­ter although you may be able to reduce the pH and your TDS may also drop. I pur­chased a used work­ing RO unit on Craigslist. I didn’t trust the car­bon block in the unit so I pur­chased a new one for another $18 -$20. I attached the RO unit to a free­stand­ing piece of ply­wood. The water going into the unit is a ¼” piece of tub­ing about the size of air­line tub­ing. I acquired a cou­pling that attached to the RO tub­ing and the other end of the con­nec­tor has a stan­dard gar­den hose con­nec­tor. When I want RO water I con­nect the unit to an exte­rior hose bib. The water runs through the RO unit and out into a 5 gal­lon fish bucket. When I am fin­ished I just dis­con­nect the RO unit and put it in the cor­ner of the garage. I nor­mally make 58 gal­lons of RO at a time. Mak­ing 8 gal­lon of RO water at a time; it didn’t take long to recover my $8.00 invest­ment. I mea­sure my water in terms of uS rather than TDS, but you can con­vert. My RO has a read­ing of 12 uS com­ing out of the unit.

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  • Jacob
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7 years 4 months ago #2287 by Jacob
I will just stick to the r/​o unit then, since it is much more thor­ough than filtration.

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  • Peter Finke
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7 years 4 months ago 7 years 4 months ago #2288 by Peter Finke
Replied by Peter Finke on topic Pro­duc­ing large amounts of black­wa­ter

I work with a so-​called mixed-​bed fil­ter, which is filled with a mixed bed of syn­thetic resins of two kinds. This method pro­duces at high speed large quan­ti­ties of fully dem­iner­al­ized water (iden­ti­cal with des­tilled water). The car­tridges must be treated (revi­tal­ized) pro­fes­sion­ally. You can not do that your­self.

The water you obtain is of the purest pos­si­ble qual­ity (near to H2O). So, you still have to add a tiny amount of min­er­als again, change the pH to acid val­ues (f.i. by peat) and add humic sub­stances in order to receive a sort of black­wa­ter.

This ist the best, quick­est and most con­se­quent tech­ni­cal way presently at hand.
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  • Jacob
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7 years 4 months ago 7 years 4 months ago #2295 by Jacob
What is there to say about using rain­wa­ter, it’s rec­om­mended in the water sec­tion on this web­site.
I think I’m going to use rain­wa­ter and store bought r/​o and then my own r/​o if I absolutely have to. I can get 10 gal­lons or so at a time from the store and rain­wa­ter could cer­tainly reach a pretty large quan­tity fast. I will look into the mixed bed filter.
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7 years 4 months ago 7 years 4 months ago #2299 by Jacob
A mixed bed fil­ter is more advanced than an r/​o unit, right, and what brand names are there to look out for?
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