Aerofloat designed and installed a wastewater treatment system at the West Lakes Westfield Shopping Centre in South Australia to meet increased flow rates and ensure compliance. This article first appeared in the October 2021 issue of Food and Drink Business.
The wastewater at West Lakes Westfield Shopping Centre had grown substantially and was exceeding 12,000 litres per day. This meant that the series of grease arrestors in place to treat the wastewater prior to sewer discharge was no longer sufficient to meet SA Water’s guidelines.
The Scentre Group contracted Aerofloat to install its patented AeroCIRC M600 DAF to ensure Westfield Shopping Centre met existing demands, whilst allowing for future business growth at
the site.
Aerofloat’s general manager of operations Michael Anderson said Aerofloat was able to customise a system to fit the tight space available at the site.
“The footprint was quite small, but we had a lot of height to work with, so we custom-built stainless steel tanks that were quite tall.”
Maintaining the system was also considered in the design.
“We created a platform that was suspended off the top of one of the tanks, allowing servicing access to the system from the roof,” said Anderson.
Wastewater generated at the site was typically from on-site cooking facilities and general dish washing. The AeroCIRC DAF system treated the high concentration of suspended solids (SS), and fats, oils and grease (FOG) in the food outlet wastewater. Aerofloat’s design was similar to a conventional DAF unit, with a rotating scraper arm. The differentiation was the AeroCIRC DAF included a 60-degree hopper bottom which allowed the unit to be completely self-cleaning, increasing efficiencies for the site long-term.
… the AeroCIRC DAF included a 60-degree hopper bottom which allowed the unit to be completely self-cleaning...
Aerofloat’s design at the Westfield shopping centre was designed to handle the wastewater generated from the existing restaurant and fast food outlets, as well as the proposed extensions to the fresh food area. The system has the capacity to treat peak wastewater flow rates of up to 36 cubic metres per hour, well above the current flow rates
