Ask the Expert Question:
Can you advise me of the correct formula for diluting the salinity in water?
We have groundwater ingress in a tunnel at a reading of 4630 us/cm it is seeping into the tunnel at 5L/sec. We need to reduce the salinity to at least 600us/cm using potable water. The potable water has around 720us/cm content and will be available at 10L/sec.
Expert Response:
The formula for figuring out the dilution would be as follows.
(Ca x Qa) + (Cb x Qb)
--------------------------------
(Qa + Qb)
Where:
Ca = conductivity of liquid A
Qa = flow rate of liquid A
Cb = conductivity of liquid B
Qb = flow rate of liquid B
In this specific case, however, you will not be able to dilute the saline water to less than 600 us/cm. The dilution water you are using has a salinity greater than 600 us/cm. Any combination of a water with 4630 us/cm and a water with 720 us/cm will have a conductivity between those two extremes. In order to dilute the saline water to 600 us/cm you would need dilution water that has a conductivity lower than 600 us/cm.
How to Calculate Dilution in tit ration ?
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