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Pretreatment to Optimize MF/RO Design and Operation in a Municipal Secondary Effluent Application

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The Western Corridor Recycled Water (WCRW) Project is the largest recycled water scheme to be constructed in Australia and will be the largest project of its kind in the southern hemisphere. One of a number of drought relief initiatives of the Queensland Government, the WCRW Project will involve building pipelines from six wastewater treatment plants in Brisbane and Ipswich to three advanced water treatment plants for treatment before being transferred to end users. Luggage Point Advanced Wastewater Treatment Plant (AWTP) will contribute 70 ML/d of product water to the overall project, and is being designed and constructed on a fast-track basis to provide water treated through microfiltration (MF), reverse osmosis (RO), and ultraviolet advanced oxidation (UV/AdOx) to replenish water in Wivenhoe Dam, a source of potable water supply for the region. Previous MF/RO systems applied to municipal secondary effluent in the region have had issues with organic or biological fouling, and have had product recovery limited due to calcium phosphate scaling. Luggage Point AWTP is being designed with high-rate clarification pretreatment to provide reduction in soluble organics and precipitation of phosphorus upstream of the membrane processes. This presentation will summarize pilot testing of the MF/RO/UV/AdOx process combination with upstream clarification performed during the latter half of 2007, and implications for design and operation of the membrane processes for the plant, which is scheduled to go on line in late 2008.
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Document Type: Research Article

Publication date: 2008-01-01

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