Stage 1 Hastings Port Macquarie 3 Villages Water Treatment Micro Filtration Plants

A $7.5 million investment in the Port Macquarie-Hastings district water supply scheme, new technology and the environment is now delivering high quality, crystal clear drinking water to the district's rural village residents.

Port Macquarie-Hastings Council's Three Villages Water Micro-filtration Plant project has been lauded as an innovative and state-of the- art system at both the Engineers Australia (Newcastle Division) Engineering Excellence Awards and the Institute of Public Works Engineering Australia (IPWEA) NSW Engineering Excellence Awards for 2006.

The water treatment plants situated at Comboyne, Long Flat and Telegraph Point utilise submerged membrane micro-filtration technology to produce high quality drinking water for communities who have traditionally encountered fluctuating water quality from direct river off-take systems. The plants are fully automated with continuous water monitoring of water quality parameters throughout the entire treatment process, ensuring the final product complies with the Australian Drinking Water Guidelines 2004. Veolia Water Solutions & Technologies Australia (VWSA) were responsible for the design and installation of the 3 water filtration plants at Comboyne (680 m3/day), Long Flat (350 m3/day) and Telegraph Point (1,300 m3/day).

Subcontracting to VWSA, DEXA Pty Ltd, provided the PLC programming, Operator Interface Design / Programming and on site electrical commissioning expertise.

The treatment process is automatically monitored by an intelligent Programmable Logic Control (PLC) program to ensure the efficient operation of the plant. Whist Operator Machine Interface (OMI) screens allows plant operations to be visually displayed and monitored on-site by staff.

The PLC system gathers information on reservoir levels, plant flow rates, water quality and river water quality parameters. When turbidity in the river is high, the plants automatically switch to 'river dirty' mode. Stored water in the main town reservoirs is used to meet village requirements allowing the plant to operate at minimal capacity until the river water quality settles. Warning and shutdown alarms are also linked to Council's telemetry network providing the capacity for remote site monitoring.

Providing an operator interface that enabled configuration and complete control of the system was the key to the control system design.

Each Village Water treatment site there were:

  • 112 Digital Ins, 48 Digital Outs, 24 Analogue Ins, 8 Analogue Outputs
  • 28 Operator interface/mimic screens, fully animated
  • 18 Operator diagnostic / alarm and history/ trend screens
  • 430 adjustable parameters for alarms, set points, and sequence timers
  • 224 adjustable configuration enable/disable alarms, sensors etc
  • Over 9 control sequences with up to 35 steps in each
  • Flow and Level controls via PID loops
  • PLC-PLC networking, Serial Power monitoring and Radio Communication

Stage 2 Hastings Port Macquarie Reclaim Water Plant

Port Macquarie-Hastings Council has spent decades investigating and planning ways to ensure they have a more sustainable water supply for the future. The Port Macquarie Reclaimed Water Plant is an integral part of that plan.

The Port Macquarie-Hastings Council, with the assistance of specialist contractors, has produced a groundbreaking example of industry best practice. Veolia Water Solutions & Technologies Australia (VWSA) were responsible for the design and installation of the reclaim water filtration plant. Subcontracting to VWSA, DEXA Pty Ltd, provided the PLC programming, Operator Interface Design / Programming and on site electrical commissioning expertise.

Tertiary treated effluent enters the plant and is disinfected with chloramines (chlorine joined with ammonia) to kill bacteria. A UV disinfection unit then passes high-energy ultra-violet light through the water. It kills bacteria and viruses and inactivates parasites such as Cryptosporidium and Giardia. The dosed effluent then passes through micro filtration. Micro filtration consists of hollow membrane fibres with tiny 0.2 micron pores allowing the smaller water molecules to pass through, while trapping the larger bacteria, protozoa and other contaminant molecules. The filtered water is then passed through a Reverse Osmosis unit. This further micro filters the water rejecting salts, nutrients, viruses and bacteria. The water is then further UV treated and Sodium Hypochlorite is also dosed to ensure disinfection as it is pumped to the Reclaim Water Reservoir.

The treatment process is automatically controlled & monitored by an intelligent Programmable Logic Control (PLC) program to ensure the efficient operation of the plant. Whist Operator Machine Interface (OMI) screens allows plant operations to be visually displayed and monitored on-site by staff. All warning and shutdown alarms are also linked to Council's telemetry network providing the capacity for remote site monitoring.

The systems in summary comprised of the following:

  • Control of over 28 pumps and two 11kW blowers
  • 225 Digital Ins, 112 Digital Outs, 64 Analogue Ins, 20 Analogue Outputs
  • 50 Operator interface/mimic screens, fully animated
  • 54 Operator diagnostic / alarm and history/ trend screens
  • 430 adjustable parameters for alarms, set points, and sequence timers
  • 224 adjustable configuration enable/disable alarms, sensors etc
  • Over 15 control sequences with up to 35 steps in each
  • PLC controlled chemical dosing utilising specific gravity, flows etc to calculate the dosing rate on a mg/L basis
  • Neutralisation of chemical waste
  • pH correction factor dosing via PLC logic
  • Flow and Level controls via PID loops
  • PLC-PLC networking, Serial Power monitoring
  • Ethernet over Radio PLC Communication.

Stage 3 Hastings Port Macquarie Wauchope Water Treatment Plant

The Wauchope Water Treatment Plant is the final stage of securing water infrastructure for the Port Macquarie Hastings municipality. The project has been recognised with two prestigious awards at the Engineers Australia Newcastle Divisions's Engineering Excellence Awards. It also received the Award for Innovation in Sustainable Engineering Excellence.

The Port Macquarie-Hastings Council, with the assistance of specialist contractors, has produced a groundbreaking example of industry best practice. Veolia Water Solutions & Technologies Australia (VWSA) were responsible for the design and installation of the 6ML per day water filtration plant. Subcontracting to VWSA, DEXA Pty Ltd, provided the PLC programming, Operator Interface Design / Programming and on site electrical commissioning expertise.

The plant, which is near Port Macquarie on the mid NSW north coast, is a $25million investment by port Macquarie Hastings Council to improve the drinking water quality for all consumers and to better achieve the quality standards set by Australian Drinking Water Guidelines.

The treatment process is automatically controlled & monitored by an intelligent Programmable Logic Control (PLC) program to ensure the efficient operation of the plant. Whist Operator Machine Interface (OMI) screens allows plant operations to be visually displayed and monitored on-site by staff. All warning and shutdown alarms are also linked to Council's telemetry network providing the capacity for remote site monitoring.

The system comprised of the following:

  • Control of over 10 pumps and two 11kW blowers
  • 160 Digital Ins, 64 Digital Outs, 20 Analogue Ins, 16 Analogue Outputs
  • 32 Operator interface/mimic screens, fully animated
  • 24 Operator diagnostic / alarm and history/ trend screens
  • 430 adjustable parameters for alarms, set points, and sequence timers
  • 224 adjustable configuration enable/disable alarms, sensors etc
  • Over 12 control sequences with up to 35 steps in each
  • PLC controlled chemical dosing utilising specific gravity, flows etc to calculate the dosing rate on a mg/L basis
  • Neutralisation of chemical waste
  • Flow and Level controls via PID loops
  • PLC-PLC networking, Serial Power monitoring

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