Yarwun Refinery Stormwater Treatment Upgrade

The Yarwun Alumina Refinery, near Gladstone, required improvements to the management and treatment of its stormwater discharges to eliminate discharge non-conformances of pH and Suspended Solids.

GANDEN investigated several options including catchment management, sulfuric acid dosing, carbon dioxide dosing, polymer dosing, artificial wetlands and modifications to first-flush catchments. This investigation led to a capital approvals process, tender design and documentation, detailed design and procurement, installation and commissioning managed by GANDEN. The installed equipment was successful in the site achieving stormwater quality compliance.


  • Options Analysis
  • Capital Approvals
  • Tender Documentation
  • Process Design
  • Civil Design
  • Electrical Design
  • Controls Design
  • Procurement of Equipment
  • Commissioning Management

Year Completed

2017 - 2020

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