The dosing rate of sodium hydroxide depends on its application:
- For iron removal, the target pH range is 7.3 - 7.6.
- For manganese removal, the target pH range is 7.9 - 8.3.
- For metal pipe passivation with orto-phosphates, the pH needs to be above 8.
- For decreasing corrosion rate in metal pipes, the pH needs to be above 7.9.
- For increasing pH after flocculation/coagulation, the dosing rate of sodium hydroxide is based on the target pH.
- If the water has a very low buffer capacity or has been demineralized by reverse osmosis, soda ash will be more suitable for remineralization.
Please contact Osorno to verify dosing rate and consumption of pH correction agent.