What part of RO takes our Nitrate?
- Thread starter chadg
- Start date
veni vidi vici
Active Member
Originally Posted by chadg
http:///forum/post/2851503
bump... come on someone here has got to know this. I assume it is the membrane, but that is pretty expensive part to replace if I don't need to.....
Ill take a stab at it and say that the carbon part should take out most if not all of it.I think the carbon cartridges need to be changed every 6 months.
How old is the test kit? Maybe your tesk kit is old and off or wrong.Or maybe its just time for filter and membrane changes.
http:///forum/post/2851503
bump... come on someone here has got to know this. I assume it is the membrane, but that is pretty expensive part to replace if I don't need to.....
Ill take a stab at it and say that the carbon part should take out most if not all of it.I think the carbon cartridges need to be changed every 6 months.
How old is the test kit? Maybe your tesk kit is old and off or wrong.Or maybe its just time for filter and membrane changes.
chadg
Member
Test kit should be OK, less than a year old and I use it all the time. I can change the carbon, but any idea if it affects fresh water differently than salt water? If so, then I would think the carbon I have running on my DT all the time would get rid of my nitrate problem as well. Which we all know it does not.
veni vidi vici
Active Member
It looks to me like the membrane from this discription:
Reverse osmosis successfully treats water with dissolved minerals and metals such as aluminum, arsenic, barium, cadmium, chloride, chromium, copper, fluoride, magnesium, iron, lead, manganese, mercury, nitrate, selenium, silver, sulfate, and zinc. RO is also effective with asbestos, many taste, color and odor-producing chemicals, particulates, total dissolved solids, turbidity, and radium. When using appropriate activated carbon pre-filtering (commonly included with most RO systems), additional treatment can also be provided for such "volatile" contaminants (VOCs) as benzene, MTBE, trichloroethylene, trihalomethanes, and radon. Essentially, reverse osmosis is capable of rejecting bacteria, salts, sugars, proteins, particles, dyes, heavy metals, chlorine and related by-products, and other contaminants that have a molecular weight of greater than 150-250 daltons. The separation of ions with reverse osmosis is aided by charged particles. This means that dissolved ions that carry a charge, such as salts, are more likely to be rejected by the membrane than those that are not charged, such as organics. The larger the charge and the larger the particle, the more likely it will be rejected.
Reverse osmosis successfully treats water with dissolved minerals and metals such as aluminum, arsenic, barium, cadmium, chloride, chromium, copper, fluoride, magnesium, iron, lead, manganese, mercury, nitrate, selenium, silver, sulfate, and zinc. RO is also effective with asbestos, many taste, color and odor-producing chemicals, particulates, total dissolved solids, turbidity, and radium. When using appropriate activated carbon pre-filtering (commonly included with most RO systems), additional treatment can also be provided for such "volatile" contaminants (VOCs) as benzene, MTBE, trichloroethylene, trihalomethanes, and radon. Essentially, reverse osmosis is capable of rejecting bacteria, salts, sugars, proteins, particles, dyes, heavy metals, chlorine and related by-products, and other contaminants that have a molecular weight of greater than 150-250 daltons. The separation of ions with reverse osmosis is aided by charged particles. This means that dissolved ions that carry a charge, such as salts, are more likely to be rejected by the membrane than those that are not charged, such as organics. The larger the charge and the larger the particle, the more likely it will be rejected.
geoj
Active Member
Originally Posted by b00st3d
http:///forum/post/2857712
You are getting nitrates? in the water before it's ever in the tank?
First things first here...how long have you had the RODI unit? How many gallons(aprox) have you made?
Have you tested the water pre DI filtration? That should be your first suspect.
I have to agree…
My set-up goes carbon, RO, DI, carbon
With quick disconnects I can sample any where I want…
http:///forum/post/2857712
You are getting nitrates? in the water before it's ever in the tank?
First things first here...how long have you had the RODI unit? How many gallons(aprox) have you made?
Have you tested the water pre DI filtration? That should be your first suspect.
I have to agree…
My set-up goes carbon, RO, DI, carbon
With quick disconnects I can sample any where I want…