Rosebery is one of the wettest towns in Australia with annual rainfall exceeding 2m and winter temperatures often reaching below 0 degrees C. Previously customers had reported issues with water quality in Rosebery, with the new plant installed to address the issues ensuring safe drinking water in-line with the Australian Drinking Water guidelines.  The Rosebery Water Treatment Plant sources water from both Mountain Creek and The Stitt River. The second of its kind to supply drinking water through nanofiltration for local towns in the remote West coast of Tasmania.

The key process areas consist of:

• Raw water supply and storage.
• Pre-screening to remove larger particles.
• Nanofiltration (NF).
• Granular activated carbon (GAC) filters.
• Calcite for pH adjustment.
• Ultraviolet treatment.
• Treated water storage and supply.

Permeate Partners was engaged on the project for:

• Design support, specifically around the Nanofiltration.
• Development of the complete plant functional description.
• HAZOP and design reviews.
• Commissioning and performance testing of the water treatment plant.

After the successful commissioning and performance testing of the plant, Permeate Partners have been engaged by TasWater to provide ongoing operations and engineering support.