Alkalinity

Alkalinity monitors are key to ensuring effective pH control in wastewater treatment when using coagulants such as ferric. It is the capacity of the water to resist changes in pH usually resulting from the addition of coagulant.

 

Online alkalinity measurement in wastewater is achieved via titration. Alkalinity is reported in units of mg/l CaCO3 and measured by titrating a sample with an acid until it reaches a defined pH end point. Titrating a known volume of the sample with dilute acid of a given strength to pH 4.3 is the standard approach. Titrating until this pH ensures all the species in the sample contributing to alkalinity have been neutralised.

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Products for this application

Accuseries

An industrial online titrator for alkalinity measurement in wastewater.

Here is a related article

Alkalinity Monitoring in Wastewater

With the increased focus on phosphorus removal in wastewater treatment, utilities are dosing more coagulant which in turn puts a greater strain on ensuring sufficient alkalinity levels.

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Established in 1971 PMA is a well-recognised provider of online instrumentation for process control and compliance monitoring. With expertise in analytical techniques such as Photometry, Colorimetry, Ion-selective electrodes (ISEs), Titration, Fluorescence, Ultrasonics and more.

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