Water Journal : Water Journal August 2012
refereed paper source management water AUGUST 2012 81 collation of data from several sources, including the LIWIS database, planning reports and discharge licence conditions. For this reason, the data input duties associated with the model have been assigned within the role description of a specific trade waste officer. The update of schematics, the correction of any faults encountered and further enhancements to the model will continue to require model development skills provided by BTO officers, and to meet this need QUU expects to maintain a commercial relationship with BTO. Conclusion Future development QUU has 28 sewage catchments that are potentially the subject of this accessible style of catchment based modelling; however, several of these catchments are currently considered too small to justify development of catchment-based models in the short--medium term. Priority will be given to the six catchments that are connected to the Western Corridor Recycled Water Scheme (Luggage Point, Gibson Island, Oxley Creek, Wacol, Goodna and Bundamba STPs) and other catchments with sensitive receiving environments, significant scale or specific problems associated with flow or mass load. QUU and BTO are currently developing the Bundamba network and STP mass load model. QUU is satisfied that the trade waste mass load model developed for Oxley Creek catchment provides an affordable, accessible and easily maintained tool for the assessment of trade waste applications by trade waste officers. Where assessment approval decisions are relatively clear cut, the model is expected to speed the assessment process and reduce the demand on high-order modeling expertise within the business. This paper won the Best Paper and Presentation Award -- Source Management at the AWA Biosolids and Source Management Conference held from 18--20 June at the Gold Coast. Acknowledgement The Oxley Creek trade waste mass load model and its associated training materials were developed for QUU by officers at Better Technical Options (BTO -- NZ). This paper was derived from project specifications prepared by QUU and the model and training materials provided by BTO. The Authors Colin Hester (email: Colin.Hester@ urbanutilities.com.au) is a member of the Operations Management Team at Queensland Urban Utilities (South-East Queensland's central distributor-retailer and water service provider to Brisbane, Ipswich, Lockyer Valley, Somerset and Scenic Rim local government areas). Colin's portfolio includes management of Trade Waste, Environmental Compliance and Water Quality Compliance. Brett Eaton (email: BEaton@bto- ltd.co.nz) is a Process Engineer at Better Technical Options Limited, an environmental consultancy based in Wellington, New Zealand. He has over six years' experience working with municipal and industrial water/wastewater treatment processes, in particular design, optimisation, risk assessment, source control and process modelling. Brett took the lead role in developing the trade waste source control models for QUU from a process perspective, as well as software design/development. Figure 4. Example (hypothetical data) network and STP capacity highlighted issues.
Water Journal September 2012-1
Water Journal July 2012