The project consisted of an extension and up-rating of the existing Durleigh
Water Works from 20Ml/day to 30Ml/day. The original plant included micro-straining,
dissolved air flotation, ozonation, pressure filtration and disinfection. Whitewater
was retained by the Contractor to provide process design services.
Detailed process design and equipment specification.
The existing micro-strainers were replaced with preliminary
ozonation for to effect initial oxidation of organics. The
dissolved air flotation plant was refurbished and new air saturation
equipment installed. The existing ozonation equipment was replaced
with new plant to provide primary and secondary ozonation.
A new activated carbon adsorption plant was installed comprising
eight 3.3m diameter vertical pressure contactors for pesticide
removal and ozone destruction.
A new chemical house was constructed housing new chemical
storage and dosing equipment for coagulation, pH control, disinfection
and plumbosolvency control.
A new PLC based distributed control system was provided with
links to the existing central telemetry system.