gary faulkner
New member
You need to see inside so as not to tumble too rapidly and turn the GFO to mush.
HTH
HTH
Regenerating GFO
- Thread starter tatuvaaj
- Start date
fishtk75
New member
I was thinking of using a whole house filter that is blue and you can not see inside as the BSR reactors are. But you are saying you need to see inside if the GFO is moving around.
d0ughb0y
Active member
yes you need to see the inside. do you currently use GFO? are you using a different reactor or are you using the whole house water filter. What I am suggesting is, in order to greatly simplify the whole process, you can just use whatever GFO media reactor setup you are using and just take that out and run the regenerating solution through it.
if you currently don't have a real GFO reactor, you can get the TLF reactor fairly cheap.
if you currently don't have a real GFO reactor, you can get the TLF reactor fairly cheap.
fishtk75
New member
Gary,
Thank you I need to get something to see in the house filter will not work.
fishtk75
New member
I have BRS reactors hooked up to the fish tank. As you said need to see inside.
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d0ughb0y
Active member
It simply means the amount you are regenerating.
I use 1 cup GFO, so I mix 1 gallon of 1 molar NaOH solution.
Because 1 gallon is 16 cups, so that is 16x the GFO I am using. Hence 16x bed volume
For rinsing, I use a lot more than 50 bed volume (50 cups is only a little over 3 gallons).
I rinse with 10 gallons rodi. I want to make sure it is clean, if you got the NaOH on your hand, you will see how hard it is to rinse off until you get rid of that soapy feeling (NaOH is an ingredient in soap)
You can just regenerate out of your current reactor.
fishtk75
New member
Mix of 1 gallon of 1 molar NaOH is how many grams of NaOH to gallon?
fishtk75
New member
Yes I see it. I needed to know now that 1 gallon of 1 molar NaOH = 160g of NaOH to 4L water? I seen on web pages that 1 molar of NaOH is 40 grams.
fishtk75
New member
Now as it said you test it that there is no phosphate when rinse is done?
cweder
Member
Just curious why sodium carbonate could not be used instead of NaOH, or a combo of each? KOH too. I understand NaOH is likely best, but I am trying to understand how PO4x4 product can claim their regeneration solution which has NaOH in it is so much better for regeneration. Polyp Labs regen product was thought to use sodium carbonate according to some posts on Reef Central UK.
Also of note, there is a description of making your own GFO resin beads under Free Patents on line: Sorbent for selective removal of contaminants from fluid. Using Purolite a400 and others resins as a anion exchange resin and seeding the iron into the resin. They use the ferric oxide to remove arsenic in the test but phosphate would be our goal of course. The polymer is supposed to make the granular ferric oxide stronger and more durable and better for regeneration. Which might explain the PO4x4 product claim to higher regeneration capacity. Too much for individuals to undertake, but of interest. Published 2/14/08 Invented by Johanna Moller and Paul Sylvester from Massachusetts.
Also of note, there is a description of making your own GFO resin beads under Free Patents on line: Sorbent for selective removal of contaminants from fluid. Using Purolite a400 and others resins as a anion exchange resin and seeding the iron into the resin. They use the ferric oxide to remove arsenic in the test but phosphate would be our goal of course. The polymer is supposed to make the granular ferric oxide stronger and more durable and better for regeneration. Which might explain the PO4x4 product claim to higher regeneration capacity. Too much for individuals to undertake, but of interest. Published 2/14/08 Invented by Johanna Moller and Paul Sylvester from Massachusetts.
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cweder
Member
Another method for specific trace phosphate removal from water is described using a macroporous resin of hydrated ferrous oxide (HFO) or hydrous manganese dioxide (HMO) and then regenerating product in a solution of NaOH combined with NaCl, then rinsed in a saturated solution of carbon dioxide. Maybe Randy could explain the benefits of this reaction. The benefits of HFO or HMO are there specificity to pick up phosphate out of the water column unlike activated carbon, ion exchange resin and zeolite. We already figured this out, but the key benefit is the higher regeneration ability of the resin making large scale phosphate removal from water ways possible at a more affordable cost. Published 6/30/11 and invented in Nanjing, China.
Just thought this was interesting and if Randy thought there may be any benefit mixing NaCl in with the NaOH for regeneration of GFO.
The claimed regeneration rate using their procedure is higher than 99.9% !! The desorption with NaOh and NaCL was 98% effective. Then the 250ml CO2 solution brang that up to over 99.9%. They used 50 ml or 52 gram of resin containing 25% Fe and rinsed this with 300ml of 2% mass NaOH-NaCl desorption liquid.
Also interesting to note the resin did reach a leakage point, although it was 10 to 20 ppb.
Hope this makes some sense and maybe we can find a way to use some of this research.
Just thought this was interesting and if Randy thought there may be any benefit mixing NaCl in with the NaOH for regeneration of GFO.
The claimed regeneration rate using their procedure is higher than 99.9% !! The desorption with NaOh and NaCL was 98% effective. Then the 250ml CO2 solution brang that up to over 99.9%. They used 50 ml or 52 gram of resin containing 25% Fe and rinsed this with 300ml of 2% mass NaOH-NaCl desorption liquid.
Also interesting to note the resin did reach a leakage point, although it was 10 to 20 ppb.
Hope this makes some sense and maybe we can find a way to use some of this research.
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cweder
Member
Looking at Brightwell Aquatics Regenerat formula it is stated to use inorganic salts of carbonate and chloride. If we are on the right track this product should contain sodium carbonate and sodium chloride. The chloride must help in some way. Anyone venture to guess how/why. PO4x4 states plain NaOH will only regenerate up to 60% so the NaCl I presume with push it higher. It is interesting to find other research to support PO4x4 claims.
