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WASTEWATER
By Rick Lallish
What term is defined as a measurement of how much acid can be added to water before there is a big change in pH?
A. Conductivity
B. Turbidity
C. Acidity
D. Alkalinity
Answer: D. Alkalinity is discussed in aerobic and anaerobic digestion. Biological treatment works best when the pH is maintained in the 6.5 to 9.0 range and there is enough residual alkalinity to keep it there. Alkalinity is expressed as mg/L as CaCO3. Understanding
