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Water

Traditionally the quality of drinking water has been assessed by the regular measurement of colour and turbidity. Aluminium residuals and a range of specific inorganic (e.g. heavy metals) and organic contaminants (e.g. disinfection byproducts, pesticides) were measured less frequently.

More recently the need to measure parameters associated with the general organic content of the water has become important.

Organic material that is not removed by conventional water treatment reacts with chlorine to form disinfection byproducts, provides a substrate for the growth of biofilms in the distribution system and exerts a disinfectant demand. Directly or indirectly it may contribute to the generation of taste and odour and dirty water events.

The presence of organic material typically necessitates a higher chlorine dose to achieve disinfection and to retain a residual in the distribution system. Customers soon become aware of higher or varying chlorine levels and report dissatisfaction with their water.

The distribution system itself is a complex bioreactor capable of adversely affecting the quality of water delivered to the customer. By understanding the changes that occur in the passage of water from raw water to the customer, water quality managers can improve operation of WTPs and distribution systems, to minimise variations in quality and to maximise customer satisfaction.

Dissolved Organic Carbon (DOC) is the most convenient measure of this organic material. Traditionally the measurement of DOC requires the sample to be sent to the laboratory analysis. It is now possible to measure DOC directly and on-line.

What We Offer

DCM Process Control offers a range of continuous, instantaneous, in-line equipment to measure water quality parameters, including DOC in both raw and treated water. These same instruments can also be used to study treatment and distribution system processes.