What action is taken if the feed water pH is above 8.0?

When the feed water pH is above 8.0, acid injection is the appropriate action to take. High pH levels can lead to scaling and precipitation of calcium and magnesium salts in water treatment systems, which can negatively impact the performance of the system. By injecting acid, the pH is lowered to a more optimal level, which facilitates the effectiveness of subsequent water treatment processes and helps protect the equipment from scaling and other related issues. This adjustment of pH is crucial to ensure the integrity and efficiency of the water treatment system, making acid injection a necessary step in managing high pH conditions in feed water.