Coagulation

Coagulation is a core process integrated into Barr + Wray’s industrial wastewater treatment systems.

Advanced Coagulation Systems for Industrial Wastewater Treatment

Designed to destabilise and aggregate fine suspended solids, colloids, and certain dissolved substances that are otherwise difficult to settle or filter. These particles typically carry surface electrical charges, which keep them dispersed and contribute to turbidity in wastewater.

The coagulation process involves the controlled addition of inorganic coagulants such as aluminium sulphate (alum), ferric chloride, or polyaluminium chloride (PAC). These chemicals neutralise surface charges, allowing fine particles to bind together into larger, denser clusters known as microflocs.

Once formed, these flocs can be effectively removed via flocculation, sedimentation, dissolved air flotation (DAF), or filtration. Coagulation significantly enhances the removal of:

Fine suspended solids and silt
Dissolved organic matter
Phosphates and nutrient loads
Colour-causing compounds and dyes

Barr + Wray incorporates coagulation as part of our tailored treatment systems, especially where high contaminant loads or low turbidity removal targets are required. Coagulation is applied both as a standalone stage, and in conjunction with advanced physical and chemical processes to optimise treatment efficiency and discharge compliance.

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Critical to coagulation performance is the precise control of chemical dosing, pH, mixing energy, and reaction time.

Barr + Wray designs systems with fully automated dosing and monitoring equipment, ensuring optimal reagent use, operational reliability, and consistent performance under variable load conditions.

Whether integrated into a containerised packaged plant or a fixed-site installation, Barr + Wray’s coagulation systems play a key role in improving downstream process efficiency and achieving robust, regulatory-compliant wastewater treatment for a wide range of industrial applications.