D&C Chemical Treatment and Discharge Works of Wastewater from the JCU Thermal Energy Storage Tank

Summary and scope

The waterproofing liner of JCU’s ~12.8ML Thermal Energy Storage Tank (TEST) on the JCU Townsville campus is past its serviceable life, requiring replacement. The purpose of this project is to have a Design and Construct (D&C) contractor treating the chemicals in the water, meeting Townsville City Council’s Trade Water Permit requirements. The critical timeframe necessities the 4°C chilled water supplying essential services on the campus to be discharged at a rate of 9L/s during the period 1st -31st May 2026. Mandatory Site Visit: Monday 27th October 2025. The contractor will be responsible for designing and constructing a suitable chemical plant, able to reduce the concentration of the molybdenum in the TEST to the required concentration at the specified rate of discharge. The work includes installing temporary pipework for discharging the wastewater into an existing sewer system. Ideally molybdenum must be extracted without changing the chemical characteristics of the molybdenum to enable it to be re-used when the tank is refilled, post-repair. The D&C contractor must also allow for vacuuming any water, chemical residues, and sediment from the tank floor to enable the re-lining works (by others) to commence from 1st June 2026. Any chemical by-products, or residues which do not meet TCC requirements, must be disposed of in an environmentally acceptable manner.