Lae water treatment plant (WTP) uses chlorine gas for the disinfection of the towns potable water supply. The system was in poor condition, so Water PNG decided to replace the existing chlorination system. It was critical that two chlorinators be installed to provide redundancy for potable water disinfection at Lae WTP.
The resulting system, supplied by Hydramet, consists of two 8kg/hr chlorinators in a duty/standby arrangement, one of which is automatically controlled. Chlorine gas leak detectors and a system that automatically closes the chlorine containers when a leak is detected were included in the design.
Two chlorination specialists travelled from Australia to PNG to install and commission the new system. They also conducted training for 8 local personnel on operating and maintaining all the new equipment.