This was a detailed design and construct contract for a 1.20ML/day upgrade of Water Corporations Denmark WWTP in southern WA. Work consisted of new inlet works, incorporating fine screens and grit removal, 1.2MLD oxidation ditch with surface aerators and submersible mixer, a tanker receival pump station, odour collection and treatment facilities, chemical dosing facilities for Alum, Magnesium Hydroxide, Polymer and Hypochlorite and an operations building to accommodate electrical, control and SCADA systems. The construction program was challenged by high rainfall, design changes to the oxidation ditch and an unidentified HV cable running through the site. Despite this the project was completed on schedule and is consistently producing water to specification.
