Construction Water

Treatment of construction water from surface works is relatively straight forward and generally only requires a high degree of solids management, however for tunnelling projects, it is inevitable that infiltrated ground water will bring with it a vide variety of contaminants requiring a much higher level of treatment.

Hydroflux  is based in most capital cities providing you with a local presence throughout the duration of the project.

Engaging Hydroflux to construct your water treatment plant means that you will have access to a skilled team experienced in water treatment for infrastructure projects. Our team includes process, mechanical, chemical, and electrical engineers plus a team of qualified and experienced project managers, site supervisors, commissioning engineers and service technicians.

We are based in most capital cities providing you with a local presence throughout the duration of the project.

Find out more

Processes
Design and construction
Operation and support
Photos

Treatment of water from construction site will usually comprise one or more of the following processes:


  • Screening
  • Gross and enhanced clarification,
  • Multimedia or green sand filtration
  • Carbon filtration


  • Ion exchange
  • Ultrafiltration
  • Reverse Osmosis
  • Disinfection


Clarification

Hydroflux has a range of designs to efficiently handle the high volumes of solids produced during excavation and TBM operation. These systems can be located within the tunnel for gross solids removal or incorporated into the main water treatment plant at the surface. Removal of solids from tunneling operations is typically a staged process using “fish tanks”, large conical based vessels and compact lamella separators.

Once gross solids are removed from the water stream, the pH will require adjustment and flocculants are dosed to enhance the separation of the finer material. Once the solids have been flocculated, a robust, compact and modular Hydroflux lamella separator is typically used to separate the solids from the water phase.

Hydroflux will determine the most suitable chemical program to ensure that the water treatment plant operates as expected

 

Solids Handling

Hydroflux has a range of designs to efficiently handle the high volumes of solids produced during excavation and TBM operation. These systems can be located within the tunnel for gross solids removal or incorporated into the main water treatment plant at the surface.

Removal of solids from tunneling operations is typically a staged process using “fish tanks”, large conical based vessels and compact lamella separators. The TunnelMAX system is a unique Hydroflux product that dewaters solids inside the tunnel as a pre-treatment stage to reduce the load on the surface water treatment plant.

Filter presses (left), screw presses (center), and belt presses (right) are all effective at dewatering solids from construction sites

 

Chemicals

Various chemicals are required for water treatment plants on construction sites including acid, coagulants, flocculants and various chemicals for the downstream polishing stages when required. Hydroflux not only designs suitable chemical storage and dosing facilities but can also offer its own range of proprietary chemicals specially formulated to treat water from construction sites. For information on chemicals click here

Hydroflux will always design the most suitable and cost-effective chemical program for the water treatment plant

 

Water polishing for reuse and high-quality discharge

The legislation for discharge water form construction site is becoming far more stringent with the EPA requiring extremely low levels of metals, hydrocarbons and emerging contaminants. As the typical discharge requirements generally exceed the water quality required for recycling, reuse of water within the tunneling operation or its use for irrigating or supply surrounding areas is a beneficial and sustainable option.

Hydroflux has vast experience in the design and construction of advanced water treatment processes and polishing of water from construction sites to enable high quality discharge or reuse will usually incorporate one or more stages of treatment from our range.


  • Multimedia filtration
  • Greensand filtration
  • carbon filtration
  • Ion exchange


  • Ultrafiltration
  • Reverse Osmosis
  • Disinfection
  • UV


Hydroflux employs skilled civil, mechanical, chemical and electrical engineers plus a team of qualified and experienced project managers, site supervisors, commissioning engineers and service technicians based in offices in most capital cities providing you with a local presence throughout the duration of the project.


  • Process design, development of PID’s and HAZOPS reviews
  • Establishment of the most suitable and compact wastewater treatment plant layout
  • Equipment and component selection
  • Preparation of documentation for council or other regulators
  • Electrical design and programming


  • Project management and site supervision
  • Environmental / Occupational health and safety plans and report
  • Quality assurance plans
  • Building works, mechanical and electrical installation
  • Commissioning, training and documentation as required.


Hydroflux understands that the footprint available for water treatment plants on construction sites can be limited and have a range of compact multilevel configurations to suit

 

Operation and support

The provision of various levels of support is critical to the ongoing successful operation of construction water treatment plants.

Hydroflux has a team of service technicians and engineers in most capital cities who can provide  on site  and remote  technical support, regular service and maintenance and offer 24/7 emergency call outs.

Various chemicals are required for water treatment plants on construction sites including acid, coagulants, flocculant and various chemicals for the downstream polishing stages when required. Hydroflux not only designs suitable chemical storage and dosing facilities but can also offer its own range of proprietary chemicals specially formulated to treat water from construction sites. For information on chemicals click here

Chemical supply for construction sites is one of Hydroflux’s specialties

 

A Hydrflux balance  / settling tank at a construction site WTP
A Hydrflux balance / settling tank at a construction site WTP
Filter press installed at a construction site WTP in Sydney
Filter press installed at a construction site WTP in Sydney
Dewatered cake produced by a filter press operating at a construction site WTP
Dewatered cake produced by a filter press operating at a construction site WTP
A construction site water treatment plant designed and constructed by Hydroflux
A construction site water treatment plant designed and constructed by Hydroflux
Multiple screw presses being used to dewater slurry generated by a construction site WTP
Multiple screw presses being used to dewater slurry generated by a construction site WTP
Hydroflux will select the most suitable chemical program for the treatment of construction site water
Hydroflux will select the most suitable chemical program for the treatment of construction site water
Media filters installed at a construction site WTP
Media filters installed at a construction site WTP
Multiple screw presses being used to dewater slurry generated by a construction site WTP
Multiple screw presses being used to dewater slurry generated by a construction site WTP
RO systems can be a requirement on some sites  to enable environmental compliance
RO systems can be a requirement on some sites to enable environmental compliance
Filters and equipment being prepared for delivery to a constcution site WTP
Filters and equipment being prepared for delivery to a constcution site WTP
A TunnellMAX system is a convenient means of dewatering slurries inside a tunnel
A TunnellMAX system is a convenient means of dewatering slurries inside a tunnel

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