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Ask the Wastewater Expert

Getting back to basics: What is pH?

The most used measure in wastewater treatment, and for good reasons
The “potential of hydrogen” or “pH” is the measure of free hydrogen activity in water and thereby indicative of the measure of its free acidity or free alkalinity. Gauged on a numeric scale of 0-14, solutions with a pH of less than 7.0 are acids. Solutions with a pH greater than 7.0 are bases and solutions with a pH of 7.0 are neutral.
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Batch and continuous pH control compared and contrasted

Someone recently asked, “What are process controls for adjusting and maintaining pH during wastewater treatment?”
The pH is one of the most important and frequently used measurements in wastewater treatment. Dependence of pH occurs in practically every phase of water supply and wastewater treatment, e.g., acid-base neutralization, water softening, precipitation, coagulation, disinfection and corrosion control.
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What are the parameters of an extended-aeration activated-sludge system?

Even when regular wasting is carried out, a high degree of flow deviation in extended aeration plants will cause loss of solids.
he activated sludge process is the most widely used biological water and wastewater treatment. As is well known, by its means, suspended-growth microorganisms are applied to breakdown wastes. Aeration, the mixing of air and a liquid, is the means used to speed the reactions involved.
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