Whitlam Leisure Centre Pool Backwash Harvesting

Scope of works

A design and construct project incorporating ACOR consultants as the lead engineers for structural and hydraulic design.

• Pool Backwash water is harvested from the existing sump via a submersible pump on guide rails at a rate of up to 10l/s.
• Water is stored in 2x50kl storage tanks where it is mixed with harvested rainwater from near by 1000m2 roof
• Stage 1 filtration consists of bag and cartridge filtration down to 1micron before UV dosing to sterilise.
• Water is then dosed with Sodium Metabisulphite to reduce residual chlorine and stored in a 3rd 50kl tank.
• A water chemistry control monitors this water for suitability prior to stage 2 filtration.
• Stage 2 filtration consists of media filtration and Reverse Osmosis to purify the water and prepare it for topping up the pools
• Another water chemistry control doses the water with chlorine to sterilise and stores in a 4th 50kl tank.
• Water is pumped from the tank via a VSD multistage pump to back to the pool balance tanks at a rate of 4l/s.
• A fully programmable PLC has been installed to control all system parameters with SMS alarms and monitoring