TasWater undertakes hazardous essential works

TasWater’s work at the Macquarie Point Sewage Treatment Plant is continuing, with two of three trickling filters being returned to service. 

TasWater is continuing its work at the Macquarie Point Sewage Treatment Plant, with two of three trickling filters being upgraded and returned to service. 

Trickling filters are a sewage treatment system inside a sewage treatment plant (STP) that rotates under pressure. 

They trickle and spray sewage over filter media to allow biological matter to grow. This aeration process removes organic matter before the water is chlorinated and discharged. 

The Macquarie Point STP trickling filters had stopped functioning due to problems with the central bearing. 

Renewals Program Project Manager (Trainee) Joseph Randall explained other methods were used to maintain the moisture within the filter. 

“This was done by running full flow through the trickling filters,” Randall said. 

“But at the end of the day, the bearings required replacement to improve the resilience of the plant for the future. The second trickling filter bearing has now been replaced. The third will be replaced in the next few months. Accessing the trickling filters involves high-risk activities. A specialist contractor was engaged to undertake these works.” 

TasWater assessed the project as high-risk

Safety issues and complexity saw the project classed as high-risk. 

“We had to manage four high-risk activities. They are crane lifting operations, confined space, isolations and working at heights,” said Randall. 

“The work undertaken has repaired and returned to operation the second trickling filter, which went smoothly and as planned. 

“An operating trickling filter reduces odour at the plant and allows the treatment process to flow correctly. We then chlorinate and discharge the water. 

“Our Macquarie Point plant now has two working trickling filters. In the months ahead we intend to have the third up and running again as well.” 

Related Articles

Send this to a friend