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Ask the Wastewater Expert

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 operational process controls for overall effective sludge dewatering?

How sludge gets dry
Press filtration using plates or belts and centrifugation separation are common methods for dewatering sludge. Someone recently asked, “What are operational process controls for overall effective sludge dewatering?”
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What are process controls for dissolved oxygen during biological treatment?

Dissolved-oxygen effluent at the secondary clarifier is primarily affected by the dissolved-oxygen control processes during the activated-sludge process.
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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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What are the treatment options for landfill leachate?

New contributor to Water/Waste Processing aims to answer readers’ most pressing questions
It’s said the United States has 1,654 landfills, handling more than 250-million tons of trash each year.
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