pH generally will be affected significantly by a clarifier.

pH generally will be affected significantly by a clarifier.

• A. True
• B. Not sure
• C. False
• D. No effect

Answer: (C)

Clarifiers are physical separation units. Their job is to settle solids; they don’t introduce strong acids or bases, nor do they exchange gases in a way that would drive large pH changes. Most pH shifts come from chemical dosing (acid or alkali), gas exchange and buffering in the biological stages, or digestion processes—not from the clarification step. So, in normal operation, the pH is not significantly affected by a clarifier, making the statement false. Minor, routine variations can occur, but they aren’t substantial.

Clarifiers are physical separation units. Their job is to settle solids; they don’t introduce strong acids or bases, nor do they exchange gases in a way that would drive large pH changes. Most pH shifts come from chemical dosing (acid or alkali), gas exchange and buffering in the biological stages, or digestion processes—not from the clarification step. So, in normal operation, the pH is not significantly affected by a clarifier, making the statement false. Minor, routine variations can occur, but they aren’t substantial.