EcoWater CHC Series Service And Troubleshooting Manual page 93

bicarbonate to form CaCO
they are not dissolved anymore. They are in a solid state, instead of a dissolved state. All other species,
such as chloride, sulfate and potassium will not be affected by CHC treatment. Formed CaCO
also contain a small percentage of Mg, but most of Mg will be in water. So the TDS (basin) will not
linearly increase with cycles. The increase of TDS (basin) will be slower with cycles than in chemical
treatment. Let's look at an example:
The is the makeup water analysis:
Calcium =100 ppm as CaCO
Magnesium =30 ppm as CaCO
Sodium =7 ppm as ion
Bicarbonate = 100 ppm as CaCO
Chloride = 25 ppm as ion
Sulfate = 10 ppm as ion
The TDS of this water is 89 ppm
When using chemical treatment, at a cycles of 3, the water chemistry will be like this:
Calcium = 300 ppm as CaCO3
Magnesium = 90 ppm as CaCO3
Sodium = 21 ppm as ion
Bicarbonate =300 ppm as CaCO3
Chloride = 75 ppm as ion
Sulfate =30 ppm as ion
So everything is increased 3 times, including TDS: TDS = 267 ppm.
However, when one uses CHC treatment, some Calcium and bicarbonate are converted to CaCO
colloids, so at a cycles of 3, the water chemistry will be the same except Calcium will be ~ 150 ppm as
CaCO and bicarbonate will be ~ 150 ppm as CaCO
3
increase 3 time, but calcium and bicarbonate increase less. This water has a TDS of 208 ppm. See the
difference? TDS only increased to 2.3 times. So cycles measured from conductivity is 2.3 whereas the
real cycles are 3.0. Substantially less water was blown down than what the conductivity based cycles
indicate.
colloids. These colloids are very small and are still suspended in water, but
3
3
3
(for most water, alkalinity = bicarbonate)
3
. e.g., magnesium, sodium, chloride, sulfate
3
may
3
3
93