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Client: South Gippsland Water
Date: April 07, 2014
Info: Retrofit of Accel-o-Fac System to aerated wwtp cells

Accel-o-Fac® upgrades at South Gippsland Water for implementation at two of their wwtp's located just outside Inverloch, Victoria in Southeastern Australia.

The initial order followed detailed evaluation over a 12 month period by South Gippsland Water culminating in a site visit by one of their Director’s to Anglian Water’s Aero-Fac wwtp at Tipps End in the UK. The order was the first for the Accel-o-Fac® system in Australia.

The Accel-o-Fac® system utilises the SERIES 3 wind-powered aerator/mixer, and is a well proven, sustainable upgrade for existing lagoon-based wastewater treatment systems such as the Inverloch wwtp.

Located on the southern tip of Victoria, the Inverloch wwtp offered South Gippsland Water the opportunity to utilise consistent winds to improve treatment, while keeping energy costs to a minimum and further enhancing their sustainability credentials.

The Accel-o-Fac® system provides wwtp operators with an extremely robust, odour-free system that requires little in the way of operator attention or maintenance, and, best of all, no sludge handling or removal.

South Gippsland Water Utility Company Places Second Order

One year later in April 2015, South Gippsland Water placed a follow-up order with Gurney Environmental to upgrade another of their wastewater treatment plants at Toora using the same Accel-o-Fac system.

Positive Results With First System

South Gippsland Water partially upgraded the Inverloch wwtp with the Accel-o-Fac system in April of 2014. Through routine monitoring of the conditions of the cell since installation, the utility company reported that not only have they benefited from a 16% increase in average DO, but they have also been able to significantly reduce the operation of the existing electric powered aeration system at the plant. This has provided South Gippsland Water with a 22% reduction in overall energy costs, which will pay for the upgrade within a few years of operation.

Positive Results With Second System at Toora

South Gippsland Water upgraded the Toora wwtp with the Accel-o-Fac system in April of 2015. Through routine monitoring of the conditions of the cell since installation, the utility company reported that not only have they benefited from a dramatic increase in average DO, but they have also been able to significantly reduce the operation of the existing electric powered aeration system at the plant. This has provided South Gippsland Water with a 72% reduction in overall energy costs, which will pay for the upgrade within a few years of operation.

Accomplishing maximum BOD removal processing rates in a facultative biological treatment system is dependent on maintaining positive DO at all times. With positive DO conditions, the aerobic bacteria will perform at their maximum for a given water temperature. Additionally, odours can be 100% buffered/stripped by an oxygen-rich water column.

Gurney Environmental completed the installation of the primarily wind-powered Accel-o-Fac® wastewater treatment system upgrade for South Gippsland Water in mid 2015. After a year of operation, managers of the wwtp have provided the results of typical DO profiles now being accomplished with dramatically reduced energy, and the results are impressive. The high residual DO levels being maintained by the Accel-o-Fac system now allow the original electric aeration to be shut off for much of the time through the use of a DO controller.

If a facultative primary treatment cell has a minimum of 1-2 ppm of residual DO, the aerobic bacteria perform waste removal at maximum rates (based on water temperature), as well as 100% odour removal/buffering. Systems are designed to maintain a typical minimum average of 2 ppm. The Toora Accel-o-Fac® mostly wind-powered system has maintained an average of 12 ppm with zero-to-low energy cost. This surplus DO profile would allow the cell to be loaded at an even higher surface rate without affecting performance. 

Since the major provider of DO in a lagoon is photosynthesis, the maximum DO deficit in a facultative primary treatment cell occurs at about dawn. A large amount of DO is consumed overnight but is supplemented by the atmospheric absorption and redistribution provided by the wind-powered aeration units. The Toora Accel-o-Fac® system has been maintaining an average of 4 ppm at dawn with zero-to-low energy cost. This surplus DO profile underscores that the cell could be loaded at an even higher surface rate without affecting performance.

"Adding the Accel-o-Fac® system to South Gippsland Water treatment cells where traditional surface aeration was previously used allowed the corporation to significantly reduce energy use. The savings in kWh are excellent with one application saving 72% in energy compared to the previous year." — Brett Vurlow of South Gippsland Water

Wind Powered Wastewater Treatment

The Accel-o-Fac system was chosen to upgrade both the Inverloch and Toora plants following a 12 month evaluation of options from around the world. Of particular interest to South Gippsland Water was the ability to use wind as a primary energy source for the Accel-o-Fac system, which is readily available day or night at these locations. (Note: An optional electric backup Motor Kit activated by wind speed is available.)

Equally important to the water company was the reliability of operation and ability to process wastewater — plus control odour. The significant increase in typical dissolved oxygen from the Accel-o-Fac system has done exactly that for each wwtp.

Sample Projects Portfolio

  • All
  • Source Management
  • Wastewater
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  • Date
  • Yorkshire Water's first new WwTP in many years is a No-Odour, No Sludge Aero-Fac® WwTP for the area around Withernsea. The new 15,000 population equivelant (PE) WwTP has been successfully treating sewage whilst automatically
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    • Wastewater
  • The No-Odour, No Sludge Aero-Fac® WwTP operated by Northumbrian Water for the area around Waren Mill has been successfully treating sewage whilst automatically handling flow/loading fluctuations of up to 10x due to local tourism,
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    • Wastewater
  • The Accel-o-Fac® wind-powered WWTP operated by GWM Water for the community of Donald, Australia has been successfully treating sewage since installation of the upgrade in the Fall of 2018, and with virtually no significant
    Read More
    • Wastewater
  • The success of Anglian Water’s wwtp at Sutton St James prompted the company to install three additional Aero-Fac® systems in treatment works including one at East Harling in Norfolk. The decision to choose the
    Read More
    • Wastewater
  • Accel-o-Fac® wastewater treatment upgrade to the Harbour View WWTW located just outside Kingston Town, owned and operated by the National Water Commission.
    Read More
    • Wastewater
  • Welsh Water installs first ResMix 5000cc Source Management System at the Pontsticill Reservoir to improve water quality prior to treatment works.
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    • Source Management
  • In July 2016, Gurney Environmental installed a 2nd installation of the ResMix 5000cc ‘source management ‘ system for Welsh Water at Llangdegfedd Reservoir in Wales.
    Read More
    • Source Management
  • The Accel-o-Fac® wind-powered WwTP for the village at Holkham Estate, England has been treating sewage since the spring of 2006, and with virtually no significant ongoing operating cost.
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    • Wastewater
  • Following use of an Aero-Fac® system on Sandringham Estate for 6 years, Gurney Environmental was contacted by the Crown Estate to examine solutions for Windsor Estate and Cumberland Lodge complex. The old 1960-era filter
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    • Wastewater
  • Southern Water's Weir Wood Reservoir is a 1.5-mile (2.4 km) long stretch of water storage, situated close to Forest Row, East Sussex, England, on the north-western margins of Ashdown Forest. In 2016 Gurney Environmental
    Read More
    • Source Management
  • The Aero-Fac® Sludge Digestion System (SDS) at Sandringham has solved the issues of sludge handling and disposal, as well as peak flow and load issues for over 15+ years.
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    • Wastewater
  • Accel-o-Fac® wastewater treatment system for the Severn & Wye Smokery in Gloucestershire providing a zero carbon footprint strategy for the business.
    Read More
    • Wastewater
  • Accel-o-Fac® upgrades at South Gippsland Water for implementation at two of their wwtp's located just outside Inverloch, Victoria in Southeastern Australia.
    Read More
    • Wastewater
  • Burncrooks WTW is located near Strathblane on the outskirts of Glasgow and is fed by a series of reservoirs. It serves a nearby population of more than 50,000. It was identified that the WTW
    Read More
    • Source Management
  • Early in 2013 United Utilities placed its first order for the unique ResMix 'source management' system following successful use of the system by Scottish Water since 2009 and over 15 years in Australia.
    Read More
    • Source Management

What Our Clients Say

Aero-Fac® Wastewater Treatment System

"For 20 years the Aero-Fac@ system at Errol has met our consent discharge levels, had no odour issues and we have not required any sludge removal. Although it was not such a high consideration 20 years ago, Errol also supports Scottish Water’s moves to becoming carbon neutral."

Robert Dey, Scottish Water

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