Upgrade of Bolivar WWTP Aeration Tank Diffused Air System

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SA Water required refurbishment of the wastewater treatment plant aeration tank diffused air system at Bolivar, the largest WWTP in South Australia.

The company engaged GHD to advise on the upgrade, with the objectives of improved reliability of diffusers (current changeover is every two years); increased removal of nitrogen from effluent; and decreased power consumption of blowers.

GHD investigated and reviewed SA Water’s trial installation and developed design optimisation and mixer option developments for the upgrade. This involved sequential design of the four bioreactors, comprising:

  • Implementation of anoxic zones to complement biological oxidation and nitrification zones (to achieve enhancement of denitrification)
  • Replacement of the existing diffusers with low maintenance/high efficiency types
  • Mixer optimisation for anoxic zones

GHD facilitated stakeholder workshops to incorporate a qualitative and quantitative assessment process, refine options and assess final arrangements (mixers and advent of swinging anoxic/aerobic zones). Following the workshops, design of the system was undertaken and involved a new switchboard design, development of piping and instrumentation diagrams and arrangement drawings. We also facilitated safety in design and HAZOP workshops with the contractor prior to installation.

The upgrade achieved SA Water’s objectives, with improved functionality, reliability and efficiency.

Asset & Facilities Management

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For more than 30 years, GHD’s asset management professionals have played a leading role in developing improved working practices for utility, transport and infrastructure stakeholders.  We work closely with you to deliver the finest practice management solutions.   

Our service offering revolves around 5 key areas of infrastructure management:

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Design Documentation

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Precise and accurate drafting is essential for the development cycle of any project. With drafting teams around the globe, you can rely on us to provide modern, economical designs for your project.

We recognise the importance of incorporating constructability, simplicity and technical excellence in your designs. Maintaining control and development of all computer aided design and drafting (CADD) activities is an integral part of our business in providing services to you.

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Materials Technology

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Access to materials testing and research enables our professionals to develop cost-effective and timely solutions for materials-related issues.

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Structures

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We have a strong reputation, a record of accomplishment in providing world-leading technical support and advice for all areas of structural design and assessment.

Demand for GHD’s services continues to grow as the company completes and advises on a number of significant structural projects for some of the world’s tallest buildings, inlcuding Al-Bidaa Tower, Dubai Tower and the Doha Convention Center and Tower in the United Arab Emirates.

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Wastewater Treatment & Recycling

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Because all wastewaters are different, it is necessary to work with a team that can combine comprehensive knowledge with practical experience in the fields of chemistry, biology, hydraulics, mechanical processes/equipment, instrumentation and control, materials handling and plant layout.

GHD can deliver on all the process components that make up a wastewater treatment plant. We have designed and project managed more than 300 wastewater treatment plants (including major municipal facilities processing 500Ml a day and industrial projects).

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