Kingborough Sewerage Upgrade Project

The Intermittent Decant Extended Aeration (IDEA) / Sequential Batch Reactor (SBR) tanks are large treatment vessels which utilise the activated sludge process to break down the contaminants in the water. Depending on flow rates into the plant, the tanks switch between IDEA mode and SBR mode to ensure the sewage is treated effectively and efficiently. Each IDEASBR tank contains approximately 2 Olympic swimming pools of sewage at any time.

About the project

The Kingborough Sewerage Upgrade Project will benefit the Kingborough area, both now and for future generations, by consolidating and enhancing the Kingborough sewerage system.

There are three main components to the Project:

  • The Blackmans Bay Sewage Treatment Plant (STP) is being upgraded to centralise waste from local catchments and treat it to a higher standard before it is discharged into the Derwent Estuary.
  • Converting sewage treatment plants at Margate and Electrona to sewage pump stations that will transfer flows to the upgraded Blackmans Bay STP. Decommissioning and closing the Howden Sewage Treatment Plant.
  • Constructing a new pressurised

About the project

The Kingborough Sewerage Upgrade Project will benefit the Kingborough area, both now and for future generations, by consolidating and enhancing the Kingborough sewerage system.

There are three main components to the Project:

  • The Blackmans Bay Sewage Treatment Plant (STP) is being upgraded to centralise waste from local catchments and treat it to a higher standard before it is discharged into the Derwent Estuary.
  • Converting sewage treatment plants at Margate and Electrona to sewage pump stations that will transfer flows to the upgraded Blackmans Bay STP. Decommissioning and closing the Howden Sewage Treatment Plant.
  • Constructing a new pressurised sewer rising main, approximately 15 kilometres in length, that will transfer waste from the pump stations at Electrona and Margate to the upgraded Blackmans Bay STP.

Project benefits

The project represents an investment of $51 million by TasWater and will provide Kingborough with significant long-term benefits, such as improved public health and better quality effluent being discharged into the Derwent Estuary, as well as ensuring our assets deliver reliable service for a growing community over future generations.

The upgrade will:

  • Provide enhanced odour management at the existing Blackmans Bay STP.
  • Improve the quality of the effluent that is discharged into the Derwent Estuary.
  • Provide sufficient capacity for future growth and continuing development within the region.

Intermittent Decant Extended Aeration/ (IDEA) Sequential Batch Reactor (SBR) tanks pictured above are large treatment vessels which utilise the activated sludge process to break down the contaminants in the water. Depending on flow rates into the plant, the tanks switch between IDEA and SBR modes to ensure the sewage is treated effectively and efficiently. Each IDEA/SBR tank contains approximately 2 Olympic swimming pools of sewage at any time.

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