Improving Safety for Sewage Pump Operators at Their Sewage Treatment Plant

Project Background

The Oberon Council were looking to improve safety for the sewage pump operators at their sewage treatment plant. Their existing sewerage pump operating on their sludge lagoon was suspended under a floating pontoon, and to gain access to the sewage pump, operators needed to extend a ladder from the bank to the pontoon. They then needed to “walk the plank” to get to the submersible pump, with the ever present danger of falling into the sludge.

Hydro Innovations suggested to Oberon Council that a Gorman Rupp self-priming pump could be mounted on the bank of the lagoon, allowing quick, easy and safe access to the wastewater pump operators for monitoring and service.

The Options

Hydro Innovations selected the Gorman-Rupp T4A3S-B Super T Series self priming pump for the job. This wastewater pump is capable of flows to 42 litres per second (L/S), heads to 33 metres, and operating on suction lifts up to 7.6 metres, so the short run from the bank to the lagoon was an easy one. The wastewater pump will handle spherical solids up to 76mm, but more importantly, is capable of handling stringy materials such as rags and wet wipes. In extreme applications where “ragging” is chronic, the Gorman-Rupp Super T Series wastewater pumps can be upgraded with the new “Eradicator Solids Management System“. This new system incorporates a lacerating tooth to prevent build-up of material on impeller vanes, along with a re-designed inspection cover-plate to allow operators much easier access to pump internals.

It is not only the move to the bank that has improved safety and ease of maintenance for the operators. Adjusting sewage pump clearances can be done in minutes, externally, without operators being exposed to raw sewage. This has a flow on effect. Because clearance adjustments are more likely to be done (because it is so easy and clean), pump efficiencies can be kept at their maximum, and blockages become much less frequent. This quick and easy preventative maintenance step will greatly reduce operator intervention, improving safety and minimise costs.

The Solution

The Gorman Rupp Super T and Ultra V wastewater pump range is specifically designed for handling sewage and wastewater applications better than any other pumps in Australia, and are universally recognised for their robust design, providing long, reliable operation and a long service life. Other sewage pumps in the range can handle flows to 250 L/S and heads to 95 metres. Wastewater pumps are also available with hardened components for abrasive applications and duplex stainless steel components for corrosive and abrasive applications.

Oberon Council are pleased with their investment to improve working environment of their operators.