Home > Mercury Awards 2012 Spotlight: CST Wastewater Solutions wins Best Green Initiative Award

Mercury Awards 2012 Spotlight: CST Wastewater Solutions wins Best Green Initiative Award

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article image The award winning wastewater treatment system

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The annual Mercury Awards were held in Sydney recently, hosted by Ferret.com.au's sister publication Logistics & Materials Handling.

The Awards "celebrate the achievements of industry leaders in their drive to achieve 'best practice', excellence and innovation in Australia’s logistics, supply chain and materials handling industry."

CST Wastewater Solutions was winner of the Best Green Initiative Award at the event for the design of a water recovery plant for the new Bluetongue Brewery in New South Wales.

CST engineered a water recovery plant for the site that targeted world's best-practice water reuse standards in the food and beverage industry. The plant now provides Bluetongue with valuable renewable energy, assisting to reduce the brewery's dependence on fossil fuels, and ultimately cutting overall energy needs by 15%.

The plant was engineered by CST Wastewater Solutions in partnership with Global Water Engineering. Plant designer SABMiller reports that in its first year of service, it has exceeded all expectations.

Designed to ultimately have an annual capacity of 150 million litres, the plant targets a reduction in water usage to 2.21/1 litres of beer produced, a figure that is among the best in the world, and well above the global average of 4-5 litres of water to every one litre of beer produced.

When in operation, wastewater passes through several pre-treatment steps before entering a GWE ANUBIX-B anaerobic methane reactor in which the organic content (COD) of the wastewater is digested by bacteria in a closed reactor, degrading the compounds and converting them into valuable biogas and cleaned effluent.

This biogas is then collected and reused as renewable energy, powering the brewery's third boiler and providing the aforementioned 15% reduction in overall power usage.

Treated effluent is passed to an aerobic post-treatment stage in which organic content is further reduced by GWE’s proprietary MEMBROX Membrane Biological Reactor (MBR) system.

In the water polishing step, the water from the MBR unit is sent through a Reverse Osmosis (RO) installation. Finally the effluent is led to a disinfection and storage unit, where the recycled water is kept for reuse applications.

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