"The current aerators are old and outdated, reducing the plant's treatment efficiencies. Therefore we need to replace all four," Dr Dharmabalan said. Improvements will also be made to electrical equipment and site access for trade waste customers as part of this project, at a cost of $790,000. The contract for the project has been awarded to By-Jas Engineering Pty Ltd. "We have also identified that the old aerators are high energy consumers. We are undertaking improvements to minimise power needs and improve efficiency.
By-Jas Engineering provided an installation consisting of six 15kW aerators. The units were brought into use in 1975 and are still in use today.
Fully assembled aerator being lifted into lagoon comlete with walkway and anti vortex/anti scour plate bolted to the cross tubes at the bottom of the tanks.
Aerator operating in the lagoon.
The town's sewage and also the effluence from a paper mill were being discharged into a primary and secondary lagoon system.
This shows a 55KW aerator floating in the water.
A closer look at the impellor of 5.5kW aerator in action. 5.5 Kw aerator in action (forground) and the 30kW unit is in the background. 30 kw aerator in action.
In less than 3 weeks the floating material had disappeared and with it the unpleasant odour.
2x22 kw aerators: Fixed Bridge Aerators, water height controlled by a decant weir IDEA type plant.
Aerator being assembled on site. Assembled and ready to be lifted and placed in lagoon.