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.

  • Media Release: TasWater unveils the ‘new’ Blackmans Bay Sewage Treatment Plant

    3 days ago
    Bbstp opening june 2019
    Date: 19 June 2019

    TasWater has today officially unveiled its upgrade of the Blackmans Bay Sewage Treatment Plant (STP). It represents a significant milestone for TasWater but more importantly, for the Kingborough community and the environment of Tasmania.

    The new Intermittent Decant Extended Aeration (IDEA) treatment process can treat sewage from up to 40,000 households, nearly double what the old plant could manage; it can treat 8.5 million litres or the equivalent of almost three and a half Olympic swimming pools of sewage each day.

    TasWater CEO Michael Brewster said this increased capacity will meet the needs of the growing...

    Date: 19 June 2019

    TasWater has today officially unveiled its upgrade of the Blackmans Bay Sewage Treatment Plant (STP). It represents a significant milestone for TasWater but more importantly, for the Kingborough community and the environment of Tasmania.

    The new Intermittent Decant Extended Aeration (IDEA) treatment process can treat sewage from up to 40,000 households, nearly double what the old plant could manage; it can treat 8.5 million litres or the equivalent of almost three and a half Olympic swimming pools of sewage each day.

    TasWater CEO Michael Brewster said this increased capacity will meet the needs of the growing Kingston and surrounding areas until at least 2040.

    "We have also paid special attention to the management of odour, installing a bio-trickling filter odour control unit to minimise the impact on the community.”

    "Importantly, the treatment plant upgrade will improve the quality of treated effluent discharged from the plant helping protect the environment of coastal communities and the River Derwent."

    The construction of new pump stations at Electrona and Margate has replaced the older underperforming sewage treatment plants and they have been closed, ending the discharge of all effluent into North West Bay. A new 15-kilometre pipeline will deliver sewage from Margate and Electrona to the Blackmans Bay STP.

    "It is extremely satisfying to now see this upgrade project fully operational and I recognise the considerable amount of work carried out by our local contractors and joint venture partners Acciona and BMD (BAJV)", Mr Brewster said.

    The upgrade which has been completed over a two year construction program was originally brought to the drawing board by the Kingborough Council back in 2008.

    Michael Brewster said TasWater is pleased to have worked with council and other stakeholders to bring the project to fruition.

    "I appreciate the support Kingborough Council has provided throughout this project and thank the community and nearby residents for their patience during the construction period."

    Michael Brewster said the Blackmans Bay upgrade demonstrates TasWater's commitment to the economic development of Tasmania and he is confident it will provide real benefits to the community and the environment.

    And for TasWater the work on upgrading our sewage network will continue.

    "Just twelve months on from completing the statewide upgrade of our water systems we are now
    focusing on improving sewerage infrastructure, working to optimise and make compliant more
    than 100 sewage treatment plants around the state,” Mr Brewster said.

    To mark today's official launch an interpretation panel has been unveiled which will be installed
    adjacent to the treatment plant on the popular dog walking track. It will outline the sewage
    treatment process and the plant's relationship with the local environment.

  • Electrona Sewage Treatment Plant conversion to Pump Station complete

    about 1 month ago
    New electrona pump station

    The Electrona Sewage Treatment Plant has now been converted to a pump station that transfers flows to the upgraded Blackmans Bay Sewage Treatment Plant.

    This is another great environmental outcome for North West Bay, ceasing the discharge of treated effluent into the bay from Electrona.

    Work will continue within the compound until later in the year. We continue to work with Kingborough Council and the EPA as works progress.

    The new pump station is pictured above.

    The Electrona Sewage Treatment Plant has now been converted to a pump station that transfers flows to the upgraded Blackmans Bay Sewage Treatment Plant.

    This is another great environmental outcome for North West Bay, ceasing the discharge of treated effluent into the bay from Electrona.

    Work will continue within the compound until later in the year. We continue to work with Kingborough Council and the EPA as works progress.

    The new pump station is pictured above.
  • BBSTP May Update

    about 1 month ago

    Blackmans Bay Sewage Treatment Plant (BBSTP) commissioning update

    Commissioning activities scheduled between 20 May and 3 June 2019 may result in fluctuations in temporary odour.

    During this time we will be filling the aerobic digester with thickened waste activated sludge.

    Activated sludge is the solid component of sewage which is full of micro-organisms which help break down contaminants in the water.

    Waste activated sludge is excess sludge– we remove a portion of the old activated sludge to make room for the new solids.

    Aerobic Digester – The waste activated sludge is thickened and then sent to a large aeration tank...

    Blackmans Bay Sewage Treatment Plant (BBSTP) commissioning update

    Commissioning activities scheduled between 20 May and 3 June 2019 may result in fluctuations in temporary odour.

    During this time we will be filling the aerobic digester with thickened waste activated sludge.

    Activated sludge is the solid component of sewage which is full of micro-organisms which help break down contaminants in the water.

    Waste activated sludge is excess sludge– we remove a portion of the old activated sludge to make room for the new solids.

    Aerobic Digester – The waste activated sludge is thickened and then sent to a large aeration tank where the micro-organisms further break down the thickened sludge to stabilise it for de-watering and disposal.

    Click here for more information on how the sewerage system works.
  • Media Release: Margate sewage treatment plant decommissioned

    about 1 month ago
    G barwick margate ps may 2019

    TasWater has closed down its Margate Sewage Treatment Plant following the construction of a new sewage pump station and emergency retention storage basin at the Dru Point facility.

    From now, all sewage is pumped from Margate through a 15-kilometre pipeline to the Blackmans Bay Sewage Treatment Plant (STP).

    TasWater CEO Michal Brewster said the closure of the treatment plant is a milestone worth celebrating for the Margate community.

    “Built back in the 1960s the treatment plant at Dru Point has been underperforming for some time.”

    Two large underground tanks have been installed to hold sewage before it is pumped to...

    TasWater has closed down its Margate Sewage Treatment Plant following the construction of a new sewage pump station and emergency retention storage basin at the Dru Point facility.

    From now, all sewage is pumped from Margate through a 15-kilometre pipeline to the Blackmans Bay Sewage Treatment Plant (STP).

    TasWater CEO Michal Brewster said the closure of the treatment plant is a milestone worth celebrating for the Margate community.

    “Built back in the 1960s the treatment plant at Dru Point has been underperforming for some time.”

    Two large underground tanks have been installed to hold sewage before it is pumped to Blackmans Bay STP with one of the existing lagoons repurposed as additional above ground emergency storage.

    This emergency facility is a backup to prevent any sewage entering the environment in case an extended power outage or an extreme flood event impacts on the pump’s operation.

    “With the sewage treatment plant replaced by the pump station and the upgraded Blackmans Bay treatment plant now online, the $50 million project to modernise Kingborough’s sewage network is coming to fruition.”

    “One of the best outcomes from the closure of the Margate STP is that effluent is no longer discharged into North West Bay.”

    “Sewage treatment is now centralised through the Blackmans Bay site where it will comply with current environmental standards and with the effluent dispersed into the deeper waters of the lower Derwent and Storm Bay,” Mr Brewster said.

    The new Margate pump station will allow decommissioning of the now redundant treatment lagoons with remediation of the site expected to be complete by mid-2019.

    TasWater is now finalising work on a similar retention pond at the Electrona STP which will likewise be converted to a pump station and also closed down.

    Photo inset: TasWater Project Supervisor Garry Barwick overseeing the concrete pour of the emergency retention basin at the new Margate Sewage Pump Station.
  • Media Release: Upgraded sewage treatment plant at Blackmans Bay up and running

    3 months ago
    TasWater’s $50 Million upgrade of the sewage treatment plant at Blackmans Bay has reached a major milestone with flows from the old plant now cut-over to the new facilities. The new Intermittent Decant Extended Aeration (IDEA) treatment process has the capacity to treat sewage from up to 40,000 households, nearly double what the old plant could manage.

    TasWater CEO Michael Brewster said this increased capacity will meet the needs of the growing Kingborough community until 2040.

    “We have also paid special attention to the management of odour at the new Blackman’s Bay facility. A bio-trickling filter odour control unit has...

    TasWater’s $50 Million upgrade of the sewage treatment plant at Blackmans Bay has reached a major milestone with flows from the old plant now cut-over to the new facilities. The new Intermittent Decant Extended Aeration (IDEA) treatment process has the capacity to treat sewage from up to 40,000 households, nearly double what the old plant could manage.

    TasWater CEO Michael Brewster said this increased capacity will meet the needs of the growing Kingborough community until 2040.

    “We have also paid special attention to the management of odour at the new Blackman’s Bay facility. A bio-trickling filter odour control unit has been incorporated to minimise the impact on the community – once we are fully commissioned our neighbours shouldn’t even know we are there.”

    Michael Brewster said the Blackmans Bay upgrade represents a very significant investment in Tasmania’s sewage infrastructure.

    “It demonstrates TasWater’s commitment to the economic and community development of Tasmania with the expanded capacity enabling both residential and business growth in the Kingston area.”

    “Importantly too it will improve the quality of treated effluent discharged from the plant to protect the environment of coastal communities and the River Derwent.”

    Construction of new pump stations at Electrona and Margate are also in the final stages. A new 15 kilometre pipeline will connect these pump stations to Blackmans Bay enabling the existing Electrona and Margate Sewage Treatment Plants to be closed and end the discharge of treated effluent into North West Bay.

    “It is extremely satisfying to now have Blackmans Bay on line and I recognise the massive amount of work carried out by our local contractors and joint venture partners Acciona/BMD (BAJV)”, Mr Brewster said.

    The upgrade was first brought to the drawing board by the Kingborough Council back in 2008 and Michael Brewster said TasWater is pleased it is bringing council’s original plan to fruition.

    “I appreciate the support Kingborough Council has provided throughout this project and thank the community and nearby residents for their patience during the construction period.”

    “I am confident the treatment plants upgrade will provide real benefits to the community and the environment,” Mr Brewster said.

    Work will continue at the site through until mid-year to complete the final commissioning process and decommission and repurpose or remove the old facilities.

  • Margate Sewage Treatment Plant, Dru Point – March 2019 Update

    3 months ago

    TasWater contractors continue works at the Margate Sewage Treatment Plant, Dru Point. This work is part of the Kingborough Sewerage Project and will see this treatment plant converted to a pump station that will transfer flows to the upgraded Blackmans Bay Sewage Treatment Plant.

    Scope of works

    The two lagoons inside the treatment plant compound are being progressively drained, initial sludge removal works are complete, with further sludge removal required, to be followed by rehabilitation of the area. Half of one of the drained lagoons will be repurposed to be used as a concrete lined emergency overflow storage lagoon.

    Installation...

    TasWater contractors continue works at the Margate Sewage Treatment Plant, Dru Point. This work is part of the Kingborough Sewerage Project and will see this treatment plant converted to a pump station that will transfer flows to the upgraded Blackmans Bay Sewage Treatment Plant.

    Scope of works

    The two lagoons inside the treatment plant compound are being progressively drained, initial sludge removal works are complete, with further sludge removal required, to be followed by rehabilitation of the area. Half of one of the drained lagoons will be repurposed to be used as a concrete lined emergency overflow storage lagoon.

    Installation of the two underground emergency storage tanks is now complete. These tanks will take flows as a result of extreme wet weather events or power outage. Any additional overflow will be captured in the repurposed lagoon.

    What is next?

    Earthworks will be undertaken incorporating:

    · Final removal of sludge;

    · Rehabilitation of the redundant lagoons and;

    · Formation of the emergency storage lagoon and associated concrete pour to line the lagoon.

    Work is on track to complete the conversion to a pump station by mid-April 2019 and will result in better environmental outcomes for North West Bay by ceasing the discharge of treated effluent into the bay from Margate.

    How will this affect me?

    Over the course of the next eight weeks residents and recreational users of Dru Point will notice fluctuations in temporary odour as we conduct these works. We apologise for the impact and thank you for your ongoing patience as these works continue.

    There will be trucks entering and leaving the treatment plant compound as the earthworks and final sludge removal works take place. To ensure safe access to the dog walking track, the entrance to the compound will be controlled during works.

    For your safety, please ensure you obey all signage and directions from traffic management in the area.

    There will be no interruption to your sewage service.

    Earthworks will continue within the compound until later in the year. We continue to work with Kingborough Council and the EPA as works progress.

    The Kingborough Sewerage Upgrade Project will provide reliable sewerage services for the coming decade, and improve environmental outcomes for both Kingborough and the Derwent Estuary.

    If you have any queries or would like further information on the Kingborough Sewerage Project, please contact Community Engagement Officer Cassandra Wells on 13 6992 or email enquiries@taswater.com.au


  • March 2019 update

    4 months ago

    Blackmans Bay Sewage Treatment Plant (BBSTP)

    The elements critical to enable the switch over to the new plant have now been tested and we are ready to progress to the next stage.

    Repairs to the concrete de-aeration chamber on the foreshore are also complete. This work was critical to enable the upgraded plant to function at its optimum performance capability.

    What’s next?

    Work to switch over and test the elements of the new plant is scheduled to begin mid-March 2019. This will be followed by the addition of sewage flows from Margate and Electrona into the new plant, currently scheduled...

    Blackmans Bay Sewage Treatment Plant (BBSTP)

    The elements critical to enable the switch over to the new plant have now been tested and we are ready to progress to the next stage.

    Repairs to the concrete de-aeration chamber on the foreshore are also complete. This work was critical to enable the upgraded plant to function at its optimum performance capability.

    What’s next?

    Work to switch over and test the elements of the new plant is scheduled to begin mid-March 2019. This will be followed by the addition of sewage flows from Margate and Electrona into the new plant, currently scheduled for April-May 2019.

    The switch over work includes:

    • small excavation works
    • cutting and demolition of some existing pipework
    • the installation of new pipework
    • directing the existing sewage flows to the new tanks

    Temporary increase in truck traffic from March 2019 to May 2019

    During the switch over and the introduction of flows from Margate and Electrona, we will need to dispose of additional sludge daily until works are complete. This means you may notice extra vacuum trucks during the day travelling to and from the BSSTP.

    24 hour works – Tuesday 12 March 2019 and Wednesday 13 March 2019 if required

    Part of the switch over work includes installation of new pipework, and works to re-direct the existing BBSTP flows to the new tanks. Once this pipework is started we must continue until complete. Therefore we may be required to continue works for up to 48 hours. During this period we need to use an excavator to lift equipment, trucks, mobile cranes, small hand tools and flood lighting.

    The location of works is confined to a small area of the plant, shown in the image here. We do not anticipate noise from the use of this equipment will impact residents however, if this is of concern please contact us on 13 6992.

    There will be no truck movements anticipated after 6pm during the 48 hour continuous working period.

    Fluctuations in temporary odour

    Residents near the treatment plant can expect to experience further temporary fluctuations in odour over the next two months. This is due to works related to the decommissioning of redundant equipment and also commissioning of the upgraded plant.

    Residents near the pump station on Lady Penrhyn Drive may also experience some odour as we continue to utilise the overflow lagoon as required throughout the commissioning process.

    Once the work is complete there will be a vast improvement in odour control management for the long term. We continue to work with Kingborough Council and the EPA as works progress.

    There will be no interruption to sewage services.

    The new plant is expected to be fully operational by late-2019 and will provide reliable sewerage services for the coming decades, and improved odour and environmental outcomes for both Kingborough and the Derwent Estuary.

    If you have any queries or would like further information on the Kingborough Sewerage Project, please contact Community Engagement Officer Cassandra Wells or Eleanor Laud on 13 6992 or email enquiries@taswater.com.au


  • Water Quality Information Session, Tuesday 5 March 5:30pm - 7:30pm

    4 months ago
    Wqis

    Officers from Kingborough Council, TasWater and the Derwent Estuary Program will present an update on the recreational water quality management strategy for Kingston Beach and Blackmans Bay.

    Community members are welcome to attend the presentation and following question time. Register here

    The event will also be live streamed on Council's Facebook page. Followers are welcome to submit questions during the live stream for the question time.

    Tuesday 5 March 2019
    5:30pm - 7:30pm Civic Centre, 15 Channel Hiighway Kingston.

    Water Quality Information Session - public meeting presentation

    Officers from Kingborough Council, TasWater and the Derwent Estuary Program will present an update on the recreational water quality management strategy for Kingston Beach and Blackmans Bay.

    Community members are welcome to attend the presentation and following question time. Register here

    The event will also be live streamed on Council's Facebook page. Followers are welcome to submit questions during the live stream for the question time.

    Tuesday 5 March 2019
    5:30pm - 7:30pm Civic Centre, 15 Channel Hiighway Kingston.

    Water Quality Information Session - public meeting presentation
  • Outfall maintenance update

    4 months ago
    Upgraded de aeration chamber 2019

    We have completed the concrete pour associated with these works and are now conducting the final elements of testing the outfall components. This testing includes temporarily increasing the flow of treated effluent through the outfall pipe.

    People in the area and recreational water users may notice a disturbance to the surface of the water in this area (approx. 550 meters from the foreshore below the BBSTP).

    This may appear similar to a school of fish or small bubbles, conversely there may be no visible affect from these tests at all.

    This work is scheduled...

    We have completed the concrete pour associated with these works and are now conducting the final elements of testing the outfall components. This testing includes temporarily increasing the flow of treated effluent through the outfall pipe.

    People in the area and recreational water users may notice a disturbance to the surface of the water in this area (approx. 550 meters from the foreshore below the BBSTP).

    This may appear similar to a school of fish or small bubbles, conversely there may be no visible affect from these tests at all.

    This work is scheduled to occur Monday 4 March 2019 and is expected to be complete by the end of the day.

    We recommend any fishers and boaties remain clear of the area when the testing is occurring. We will have a boat in the area on Monday to advise people of what is happening and recommend they clear the immediate area during the test as a precaution.

    There will be no interruption to your sewerage service.

  • Planned shut down at the Blackmans Bay Sewage Treatment Plant – temporary odour may result

    4 months ago

    As progress continues at the plant we are now working to assess and conduct any required maintenance to the outfall. The outfall transfers treated waste water (effluent) from the treatment plant to disperse it past the foreshore below the treatment plant out into the river.

    While divers perform the works we need to amend operations at the plant to alter the flows through the plant as required.

    This work may result in temporary odour
    On the day of works there may be a temporary increase in odour from the treatment plant.

    Residents near the pump station on Lady Penrhyn Drive...

    As progress continues at the plant we are now working to assess and conduct any required maintenance to the outfall. The outfall transfers treated waste water (effluent) from the treatment plant to disperse it past the foreshore below the treatment plant out into the river.

    While divers perform the works we need to amend operations at the plant to alter the flows through the plant as required.

    This work may result in temporary odour
    On the day of works there may be a temporary increase in odour from the treatment plant.

    Residents near the pump station on Lady Penrhyn Drive may also experience some odour as, depending on the actual flows on the day, we may need to utilise the overflow lagoon.

    Similarly, there may also be some odour generated from the pump station on Suncoast Drive.

    When
    We have scheduled works to occur on one day during the week beginning Monday 18 February 2019. Works will begin late morning and be should be complete late afternoon on the same day.

    It is difficult to schedule a specific day as we require a dry weather day coupled with conditions conducive to diving. However, work is currently scheduled to occur Wednesday 20 February 2019 weather permitting.

    There will be no interruption to your sewerage service.