PWN Technologies participated in a study funded by the Australian Water Recycling Centre of Excellence (AWRCoE), and led by Victoria University. The study evaluated the efficacy of ozone in conjunction with ceramic membranes for water reuse over a 12-month period, with PWN Technologies supplying the membrane pilot plant and technical expertise.

The trial was carried out at Melbourne Water’s Eastern Treatment Plant (ETP) using secondary effluent from the plant as feed water. The test was conducted with ozone which in combination with CeraMac® led to enhanced plant performance. The ozone is disinfecting the water and at the same time is keeping the membranes clean for higher fluxes: 180 – 200 lmh.

The project partners/sponsors were the Australian Water Recycling Centre of Excellence, Victoria University, PWN Technologies, Black and Veatch, Melbourne Water, South East Water and Water Quality Research Australia. This novel ceramic membrane process is being trialed for the first time in Australia.

The novelty of the Australian trials is the assessment of the cost and efficiency feasibility of ceramic membranes in the context of wastewater recycling. The high organic content of secondary wastewater, which presents a potential fouling issue for membranes, is one type of wastewater where ceramic membranes are expected to outperform alternative applications.

“This application of the novel process to secondary effluent is not only unique in Australia, but unique globally,” said Mikel Duke of Victoria University. “These benefits stem from two innovative features: firstly ozonation is carried out simultaneously with membrane filtration, and secondly, the membrane is made of ceramic material.”

Documentation

AWA Water Recycling. Final test results, July 2013.

New Treatment Trailled in Melbourne.

Coverstory Water Engineering Australia.

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Game changer for waste water recycling.

Sustainability matters, June/July 2013.

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