The pH of 9 of SWRO is not because of high alkalinity or other alkaline ions it is high because it is RO water and ionic strength is less. Acid dosing to reduce pH may make the water more corrosive if the control is proper which is likely. Chlorine will be equally effective if dosed into this water at pH 9, as pH will come down to some extent during chlorination. Try implementing my suggestions as it is which can be subsequently standardised when required.
Published by Guru Das Saha
The pH of 9 of SWRO is not because of high alkalinity or other alkaline ions it is high because it is RO water and ionic strength is less. Acid dosing to reduce pH may make the water more corrosive if the control is proper which is likely. Chlorine will be equally effective if dosed into this water at pH 9, as pH will come down to some extent during chlorination. Try implementing my suggestions as it is which can be subsequently standardised when required.