Southland Filtration recently completed a unique project using cutting edge technology, an Effluent Water Disinfection Treatment System for the Bio-secure Fish Facility for the Department of Primary Industries, Parks Water & Environment (DPIPWE).

DPIPWE, in partnership with the Tasmanian Atlantic salmon aquaculture industry and the Fisheries Research & Development Corporation, recently constructed a fish research facility.

This building is a bio-secure animal research facility providing biocontainment to physical containment level 2 (PC2) as specified in AS/NZS 2243.3:2010 & AS/NZS 2982:2010.

To meet PC2 requirements as specified in the relevant Australian Standard (AS/NZS 2243.3:2010), water effluent produced by the facility must be treated by disinfection prior to release to municipal sewer.

Southland Filtration was engaged to design, construct, install and commission the effluent water disinfection treatment system, which was designed around a linear batch process of reception-chlorination-discharge.

A skid mounted system constructed in the factory with all pumps, filters, valves, controllers and control panel with PLC was installed. The only items external to the skid were tanks, level control and the necessary pipework.

Three tanks were used in the recirculation/batch system where Tank 1 was used as the filling tank with a recirculating line with filter system. Transfer to Tank 2 and/or 3 is in sequence from Tank 1 via a second filter stage. Recirculation and chlorine dosing is done, also in sequence in these Tanks. Discharge to drain is from tanks 2 and 3 in sequence.

Free Chlorine controller, pH and ORP is measured and logged to SD card. Also a blocked filter bag alert was incorporated.

To maintain a safe working environment, Southland Filtration also installed an FRP balustrade with 3 self-closing gates.