When operators are asked to define pH, many struggle to describe what it is and how it is measured. Let’s look at those matters — and explore how questions about pH might be worded on a wastewater licensing exam.The technical definition of pH is: the logarithm of the reciprocal of the hydrogen ion activity in a given solution. So, you’re probably asking: What the heck does that mean? If we look at what pH represents, we find that it is the measurement of how acidic or alkaline (basic) a solution is. If we grab a sample of treatment plant influent
