Our Case Studies

20 January 2021

Water Treatment Projects for Guidera O’Connor

We have undertaken many successful waste water and water treatment projects with Guidera O’Connor.

Project Snapshot:

Timeframe:         November 2019 – May 2020

Beenyup WWTP 150ML Sludge Upgrade

The Beenyup Wastewater Treatment Plant (WWTP) is the second largest wastewater treatment plant in Western Australia. The plant serves an area bounded by Butler to the north, Ellenbrook and Midland to the east, Scarborough Beach Road to south and the coast to the west. The plant serves domestic, commercial and industrial customers from Perth’s northern suburbs with an equivalent population in excess of 600,000 handling (on average) 135 megalitres per day (MLD).

The Beenyup WWTP 150 MLD Sludge Upgrade project has been implemented to upgrade the sludge treatment process. This comprises of sludge from Beenyup and imported sludge from other treatment plants, mostly Alkimos.

The main drivers for the delivery of this project were to:

  • Cater for the increased flows to 150 MLD
  • Provide thickening of the raw primary sludge (RPS) which:
  • Increase the digester sludge retention time (SRT) to the designed requirement. The minimum mesophilic anaerobic digestion solids retention is greater than 15 days at 35oC ± 3oC
  • Reduce the load on the centrifuges

A new sludge building was constructed, the upgraded asset has additional equipment installed, to enable thickening of RPS prior to introduction into the process. The following equipment was added to the plant, to enable RPS thickening:

  • Rotary Screw Thickeners
  • Sludge Screens (Strain Presses)
  • Spirotainers
  • RST Polymer Plant
  • Reclaimed effluent pumping system including tank and skid
  • Bridge Crane
  • Light and Power Fitout
  • Various other added scope items were undertaken as an increase in scope to this project

The electrical installation undertaken by Mason Electrical Engineering Contractors included electrical supply, installation and commissioning package.

  • Supply and installation of new cable ladder, electrical control and communication cablingUndertake existing control panel modifications
  • Supply and installation of new cable ladder, electrical control and communication cablingUndertake existing control panel modifications

Team Size:  8 personnel

Project Value:    $500k

Woodman Point

Blower Replacement

Replacement of 9 new high-speed turbo blowers.  This includes replacement of the existing blower VSDs and modifications to the MCCs to suit.

SST Scraper and RAS Pump Installation

Supply and install cable ladder, power instrumentation, control and communications cabling and local control stations to facilitate the completion of works of the remaining 4 SST structures.

CIP for MLE Aeration Diffusers

Supply and install cable ladder, power instrumentation, control and communications cabling and local control stations to facilitate the completion of works for the CIP and MLE Aeration Diffusers.

Project Value:    $700k

Murchison EDR Project