Holts Hill Fluoride Dosing System Upgrade

About the project

This project upgraded the fluoride dosing system which provides fluoridation for the East and West Bank mains. The system has a combined capacity of 1000ML/day.

Key Capabilities

Water & wastewater treatment plant works, Mechanical installations

Project Location

Mt Crosby, Queensland

Client Name

Seqwater

Project Duration

November 2017 - September 2018

Project Value

$1.2 Million

Project scope

  • Decommission and remove redundant equipment
  • Supply and install new HDPE dosing and batching tanks and equipment
  • Supply and install new service water pumps, dosing pumps, pipework and instrumentation
  • Overhaul fluoride screw feeder and install of new gearbox for increased capacity
  • Upgrade electrical and control systems
  • Re-commission dosing system, performance testing and operator training

Challenges

  • Although this was a construct-only project, significant re-design was required and undertaken. These design changes resulted in rework and delays
  • The tight time-frame imposed due to the critical nature of the facility meant alternative design processes had to be implemented
  • All decommissioned pipework and equipment had to be treated and handled as fluoride contaminated trackable waste

Achievements

  • To ensure the dosing system performs as per design during peak periods, commissioning was planned and executed in detail
  • Detailed planning and early procurement of long lead time items prevented delays
  • Strict compliance with all environmental regulations and the application of controls, enabled all trackable waste to be disposed of without incident
  • Close collaboration with all stakeholders enabled fast-tracking of the service water system re-design to maintain schedule
  • Despite working in restricted spaces and at heights, there were no safety incidents and zero lost time injuries
  • Implemented design changes to ensure the system met the client’s specific requirements and functioned as intended