orp, oxygen reduction potential, denitrator monitor

[markstrimaran]

Hi
I have been resurching ORP " millivolt meters, for denitrator use. I have a question about , high alkaline water, and "mv readings.
Basically +200/400 is standard good, and -50/350mv is needed for denitrator to function.
High alkaline potable water can easily be -300mv.

My tank has 8.3 pH is 300+ kh and GH.
Current ORP is neg-61mv going in denitrator at 7ppm nitrate.
It is pos+ 002mv going out. At 0 ppm nitrate. At 6.6 pH

My number don't match any thing that I have read, except that high alkaline water will have a neg mv reading.

I want to use the Orp mv scale. To know when to carbon dose as I increase the flow.
I made a calibration chart based on nitrate ppm.
Basically as the number go down nitrates go up.

 

[markstrimaran]

Well here I go again. Into the great unknown.

 

[markstrimaran]

https://www.google.com/url?sa=t&sou...gggMAE&usg=AFQjCNGgqtjfkRd28ts23SpcFffrOiVPmA

Easy too read.

 

[markstrimaran]

https://www.google.com/url?sa=t&sou...gg2MAc&usg=AFQjCNGA1SkxRaqiExfGh3ymfnV7zkeRnQ

A useful link that explains my issue.
The Orp mv levels for ozone in salt water, are completely different.

 

[markstrimaran]

My Orp mv readings on denitrator. After 1cc of white table sugar. 24hrs process time.
7ppm inflow.
-10 mv 7ppm nitrate.
-5mv = 3ppm nitrate
0mv = 0ppm
+1mv - +30 mv=0 ppm nitrate.