The Rise and Fall of Micro-constituents at the Bundamba AWTP

The Western Corridor Recycled Water Project (WCRWP) is one of the major elements of the Queensland Drought Response initiative. The WCRWP supplies purified recycled water to two power stations and is also planned to supplement the drinking water supplies from the Wivenhoe Dam as an Indirect Potable Reuse (IPR) approach. Being the first significant planned implementation of IPR in Australia, the control of micro-constituents was a significant factor in the process design and acceptance of IPR in Australia.Investigations at the Bundamba Advanced Water Treatment Plant (AWTP), the first of the three AWTPs to be constructed and commissioned, have shown excellent removal ofmicro-constituents across the process train. Also, a strong, yet non-linear, relationshipbetween retention time and NDMA formation has been identified.