WestWater recently completed the design and construction of a new containerized Sodium Hypochlorite storage and dosing plant to replace the old chlorination facility onsite.
The Pozzi Rd WWTP facility stores effluent re-use water from Booth Rd WWTP (Manjimup) in a storage dam located on site at the WWTP. The effluent water is pumped from the dam by the Irrigation Pumps. It is filtered via a screen filter package then dosed with Sodium Hypochlorite before being distributed to the woodlot irrigation network.
The old chlorination system was in a dilapidated state and non-compliant to current WC design standards for hypo storage and dosing. As a result, it was an unsafe site to work on. There was also limited automation of the process and no remote visibility of plant operation on SCADA making it a difficult plant to operate succesfully.
The new hypo storage and dosing system has provided the following improvements :
- Safe, containerized and bunded storage of the chemical with load in panel and level monitoring. Air conditioned to reduce chemical decay issues.
- New hypo dosing cabinet and dose point to achieve WC barrier protection standards for chemical safety.
- Relocation of potable water tank with addition of shade cover, tank level alarm and automatic recirculation.
- New flowmeter installation for automatic flow paced dosing and irrigation system monitoring. Pressure transmitters added for filter DP monitoring.
- New PLC, OIP and power and control switchboard to automate process and provide new user friendly irrigation interface replacing old retic controller. Full SCADA mimics and control.
