Buller District Council Wastewater Plant, Westport

A bold move to try new screw type air blower pays off for Westport Wastewater Plant

Issue

When the Buller District Council needed to replace one of three existing air blowers which kept its Westport wastewater ponds circulating, it stipulated a desire for ultra-efficiency and reliability.


They needed an air blower which required minimal maintenance for it to operate continuously. They needed operational savings to be made and they were having trouble finding adequate solutions.


PSL Total Air had a bold new product available and this project led to a first of its kind solution in Australasia.



Action

Realising the district council needed to shift from its older roots type blowers to a more future-proofed screw-type blower, PSL Total Air set about installing the Kaeser brand

  • DSB22OL SFC screw blower 
  • Sigma Control 2 controller 

This innovative reliable performer is purpose-built for low pressure municipal and industrial water systems and is built to be tough and trouble-free. 

It features the world-renowned SIGMA profile rotors which offer efficiency gains of up to 35 percent. This ensures maximum savings to commissioning, operating, and maintaining the wastewater plant.


The new rotor technology is ideal for municipal and industrial wastewater treatments where blowers are in constant operation.



Result

The after-install analysis showed the Buller District Council had made the right choice with the new screw-type blower.  PSL Total Air Nelson manager Charles Walta said of the two air blowers, one runs 12 hours a day and the other 24 hours a day.


“So we found that the 12 hour a day compressor is looking at saving about $18,000 per annum in power costs to the council, and the 24 hour a day blower, a bit more than that,” says Charles.


The success of the first-ever Kaeser DSB220L screw blower to be sold in Australasia has beneficial applications for numerous other municipalities too.


PSL Nelson have since installed two new Kaeser DBS 221L blowers, bringing the number of Kaeser blowers to three, two of these being on-duty and one on standby. The two new blowers have proven to be even more efficient than the first one, a great result for the council.



So we found that the 12 hour a day compressor is looking at saving about $18,000 per annum in power costs to the council, and the 24 hour a day blower, a bit more than that