Sulfur denitrifier

[DonW]

Boomer,

These things seem to ba a hit. Some have carx media and some dont.

What if anything do you think the carx media is going to do. The ph is pretty low but all the research so far, is saying the media isnt disolving like it would with co2.
Using a orp controller seems to be the new thing to make these safer. Could you explain whats happening here and how orp is helping.
One company is dosing strontium into the units for phosphate removal. Could you explain this also.

Thanks
Don

 

[Boomer]

Don

First here for starts

Hydrogen Sulfide and the Reef Aquarium
http://reefkeeping.com/issues/2005-12/rhf/index.php

ORP and the Reef Aquarium
http://www.reefkeeping.com/issues/2003-12/rhf/feature/index.php

Second, the Sr thing was an idea of an old friend of mine long ago. I have his article so give me time to find it, as it has all the detail in it. I'm kinda taxed with Randy gone till the 20th.

Last, Sulfur denitrifier I not know much on this subject. We have had lots on our RC forum bringing it up lately also, so a good placed to do search

 

[DonW]

Thanks,

Dont rush, Ive got to get a new carx first anyways so I have a few weeks. Seems to be a little talk but no real answers. I guess you control the flow rate by monitoring orp in the reactor chamber.
I would like to here more about the Sr thing when you get around to it.

Thanks
Don

 

[Boomer]

Don

Have not found the article yet but did find Adolf's Denitro article. Long ago I pulled out the other article for Randy and Habib and here is what I said.


Phosphours in the Marine Aquarium
The application and use of Stonatium Nitrate in a denitrification chamber to give a end yield of SrHPO4, a insoluble solid


In short the Sr thing is remove PO4


A part copy of Adolf's atticle on Sr.

If Strontium chloride or sulfates are used in lieu of the nitrate, either chlorides or sulfates accumulate and the alkalinity is reduced as strontium carbonate precepitates. We have used strontium nitrate in the experimental tank since 1989 and the phosphate level at this date is less than can be detected by wet chemistry analysis having a resoultion of 0.01 mg / l phosphate. The daily input of Sr is equivalent to 100mg / l as the ion and translates to 0.48 mg / l /day in a 55 gal tank. This dose is roughly 1 /20 th of the typical seawater concentrion.


Me
This same method was later applied to his 275 gal reef tank and PO4 remains less than 0.1 mg / l. Other field test tanks showed the same results/

 

[DonW]

Phosphours in the Marine Aquarium
The application and use of Stonatium Nitrate in a denitrification chamber to give a end yield of SrHPO4, a insoluble solid

Would this mean that its then skimmable if the effluent was fed into the skimmer intake? I would assume you should do this anyways just to re-oxygenate the effluent.

Thanks
Don

 

[Boomer]

Found it

To be simple as Adolf is like Randy

Sr(NO3)2===> Sr++ + 2NO3-


Nitrate
NO3- + H2O + C ==> N2(g) + CO2 + OH-

CO2 + H2O==> H2CO3

H2CO3 + OH-==> H2CO3 + HCO3- + H2O

In short
Sr(NO3) + H2O ==> Sr++ + H2CO3 + H2O


Sr++
Sr++ + 2HPO4-- ==> SrHPO4 (s)

with some
Sr++ +CO3 ==> SrCO3(s)


The end result is there is no/nil net change in water chem. parameters, i.e., Ca++ , Sr++, Mg++, pH or Alk..


If can get to a Public Library ( or call and ask for a Copy), which has FAMA, Oct 1991 ( Freshwater and Marine Aquarium magazine).Phosphours in the Marine Aquarium; Detailed experiments, by Adolf Klostermann pg 27-30 and pg 208

About as skimmable as removing Calcium Phosphate from a Kalk reaction or even Calcium Carbonate or finely ground Aragonite, from say Purple-Up