Wastewater recycling plant upgrade wins innovation award

Parsons Brinckerhoff (PB) was recognised for the preliminary engineering design and project management for the upgrade of the $2.35 million Dalby recycling treatment plant.

The Dalby wastewater recycling plant upgrade was awarded for innovation at the Institute of Public Works Engineering Australia Queensland (IPWEAQ)’s awards in Brisbane in October.

PB principal water engineer, Ian Cameron said the upgrade enabled the Western Downs Regional Council to reserve drinking water for Dalby residents, rather than industrial users.

“The plant provides class A+ recycled water to the Dalby biorefinery, which produces ethanol from grain,” Mr Cameron said.

“Previously this business was using drinking water for its industrial processes,” he said.

“PB designed a new treatment process and a dedicated recycled water pipeline from the plant to deliver high-quality water to refinery – reserving potable water for residents.

“The treatment process was achieved without altering the existing infrastructure or biological wastewater operation.

“The plant includes technologies such as submerged ultrafiltration membrane, followed by ultraviolet disinfection and final chlorination to maintain water quality.

“The quality of the recycled wastewater is very high to support the ethanol’s refinery’s strict water quality requirements,” Mr Cameron said.

The first water was produced in February 2010 and the project achieved practical completion in March 2010, two months ahead of schedule.