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The Image Flat Water Treatment Plant feeds Nambour, Yandina, Eumundi and coastal urban development north of the Maroochy River in Queensland.

The plant was originally designed for 40ML/d, however, there were a number of existing infrastructure constraints which limited the plant capacity.

Seqwater identified the need to upgrade the treatment plant to improve its performance and ensure it continued to produce high quality drinking water up to 25ML/d. 

Designing new facilities to alleviate bottlenecks

Aurecon was retained by Seqwater to design new sludge handling and lime dosing facilities for pH correction and alkalinity control to remove some of the bottlenecks.

This included civil, structural, mechanical, electrical, control and instrumentation works.

A lime clarifier system was proposed to overcome the operational difficulties associated with a conventional lime slurry dosing plant, and to achieve Hazard Analysis and Critical Control Points (HACCP) targets and compliance with the bulk supply agreement with Unity Water.

Location

South East Queensland, Australia

Client

Seqwater

Aurecon's Role

Design new sludge handling and lime dosing facilities, civil, structural, mechanical, electrical, control and instrumentation works

Complete

2014

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Aerial view of the Image Flat Water Treatment Plant Facilities Upgrade.
Close up of the Image Flat Water Treatment Plant.
Inside workings of the Image Flat Water Treatment Plant.
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Aerial view of the Image Flat Water Treatment Plant Facilities Upgrade.
Aerial view of the Image Flat Water Treatment Plant Facilities Upgrade.
Aerial view of the Image Flat Water Treatment Plant Facilities Upgrade.

To address the capacity problems associated with excess sludge, sludge thickening/dewatering facilities were proposed.

The upgrade was expected to improve the plant’s output capacity and its reliability as a water source for the community.

Construction commenced in January 2014 and was completed in December 2014.

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