Suspended solids & SVI analysis.Discover S3A
Phosphorus is an essential part of living systems and due to its reactivity, generally exists in an oxidised form called phosphate.
In water treatment, phosphate is often added to drinking water at low levels to provide protection against lead build up in the water. In wastewater treatment, phosphorus is often present at relatively high levels in the influent (from detergents, fertiliser run off and human waste) and is therefore removed to prevent it being discharged into the watercourses. Too much phosphorus in natural water sources can lead to algal blooms which starve aquatic life of the oxygen they need.
Typically, phosphate is measured in a water treatment process using colorimetry. There are two different chemistries that can be used depending on phosphate levels expected. The low range phosphate is the Ascorbic acid method, the higher range chemistry is called the Vanadomolybdate method.
A new and novel technique for measuring total phosphorus and orthophosphate in wastewwater applications is magnetic resonance spectroscopy.
An alternative approach that can be used in wastewater treatment is to use an online UV-Vis spectrophotometer to characterise and quantify organics in real time, and with some laboratory testing, build a surrogate phosphorus parameter based on the organics.
Feed forward coagulation control system using UV-Vis spectroscopy for optimising chemical phosphorus removal (CPR)
How a wastewater treatment works can comply with metal and phosphorus consents without large capital spending schemes using a Compass CPR coagulation control system.
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