pH and redox control
pH control
In many processes, pH is an important parameter. It is important to measure it correctly and to be able to adjust it afterwards.
The measurement of pH is generally carried out with pH probes. It is important to select the appropriate probes for the medium in which the measurement takes place.
A dosing pump is often used to dispense an acid or base to adjust the pH to the desired value. But it is also possible to use other technologies such as CO2 dosage.
To obtain a correct dosage, without overdosing, it is important to ensure correct dosing.
Redox control
Redox potential is a measure for the quantity of oxidative or reductive species currently present in the water. Measuring this redox potential is often done when an oxidative or reductive substance is dosed, so the dosing can be accurately controlled.
An example of this is disinfection with chlorine. Chlorine has a very oxidative nature so when it is dosed, the redox will change accordingly. When this redox surpasses a certain value, the controller will give a signal to the dosing pump to dose more or less chlorine.
Another common type of dosing, is dosage of NaHSO3 for the detoxification of Cr VI.
PCA can help you with these technologies, both in design and construction of the installation.
