GANDEN Engineers and Project Managers is one of Australia’s leading water industry consultants.
GANDEN has completed more than 500 water industry projects, from the Torres Strait Islands to Tasmania.
With offices on the Gold Coast, Brisbane, Melbourne, Cairns and Rockhampton, we service our clients throughout the Asia Pacific Region, especially in remote locations.
We work with:
- Local and State Government
- Water Companies
- Mining Companies
- Construction Companies
- Partner Consultants
DIGITAL ENGINEERING
GANDEN has invested heavily in IT infrastructure, software and training. Below is a sample of the digital engineering tools we use.
3D Design and BIM
Wastewater Process Modelling
Sewer Network Modelling
Water Network Modelling
Pipe Stress Analysis
Structural Analysis
Finite Element Analysis
CFD Modelling
Transient Analysis
Remote Plant Monitoring
Reverse Engineering
Financial Modelling
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3D Design and BIM
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Wastewater Process Modelling
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Sewer Network Modelling
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Water Network Modelling
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Pipe Stress Analysis
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Structural Analysis
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Finite Element Analysis
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CFD Modelling
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Transient Analysis
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Remote Plant Monitoring
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Reverse Engineering
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Financial Modelling
Wastewater Treatment
Grenfell STP Major STP Upgrade
Ballarat STP Upgrade
Mirani WRF Stage 1 Upgrade
Mirani WRF Stage 2 Upgrade
South Lismore STP Major Upgrade
Maroochydore Sludge Thickening Upgrade
Oxley Creek STP Inlet Works, Grit Removal and Screening Handling Equipment
Darwin STP Major Upgrade
Luggage Point Dewatering Major Upgrade
Oxley Creek Centrifuge Upgrade
Ravenshoe STP Major Upgrade
Awonga Point MBR Major Nutrient Removal Upgrade
Palm Island STP Major Upgrade
Nambour MBR Plant Major Upgrade
Membrane Maintenance
Membrane Bioreactor Upgrade
Childers STP Major Upgrade
GIN Gin STP Major upgrade
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Grenfell STP Major STP Upgrade
Process, Mechanical, Civil, Structural and Electrical Design of a new 2,500 EP IDEA / SBR plant for Grenfell in central New South Wales. (Current Project) -
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Ballarat STP Upgrade
GANDEN provided designs for upgrades to multiple areas around the Ballarat STP. The designs were able to be performed remotely during the period of the 2020 COVID-19 restrictions by the use of point cloud laser scanning. -
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Mirani WRF Stage 1 Upgrade
Project Management, Process, Mechanical and Civil Design and Commissioning Supervision for a new Inlet Works, Odour Control Facility, Service Water and Fire Water Facilities at Mackay Regional Council's 10,000 EP Mirani Water Recycling Facility (WRF) in North Queensland. GANDEN was the process designer, civil designer and commissioning lead. GANDEN also performed the role of Project Manager for the entire project. -
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Mirani WRF Stage 2 Upgrade
2 Train SBR, Class A+ Membrane Plant, Sludge Digestion and Dewatering -
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South Lismore STP Major Upgrade
Civil, Hydraulic and Mechanical Design and Drafting for the 20,000 EP Lismore STP Upgrade. This plant employed Sequencing Batch Reactor treatment, with cloth filters for effluent polishing and belt filter press. -
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Maroochydore Sludge Thickening Upgrade
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Oxley Creek STP Inlet Works, Grit Removal and Screening Handling Equipment
Process, Hydraulic, Civil and Mechanical Design for a 270,000 EP STP in Brisbane. -
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Darwin STP Major Upgrade
Process, Hydraulic, Civil and Mechanical Design of an inlet works with band screens and grit removal and odour control for a 50,000 EP Leanyer Sanderson sewage treatment plant in Darwin. -
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Luggage Point Dewatering Major Upgrade
Process, Mechanical, Civil and Structural Design for new sludge transfer system, centrifuges, polymer dosing, MHL dosing, service water and centrate pumping for the 1,000,000 EP Luggage Point STP in Brisbane. -
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Oxley Creek Centrifuge Upgrade
Process, Hydraulic, Civil and Mechanical Design for a 270,000 EP STP in Brisbane. -
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Ravenshoe STP Major Upgrade
Process, Mechanical, Hydraulic, Civil Design and Commissioning of a new 1,500 EP MBR Plant in North Queensland. -
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Awonga Point MBR Major Nutrient Removal Upgrade
Process, Mechanical, Civil, Structural and Electrical Design and Commissioning of an upgrade to a 8,000 EP MBR plant to achieve 1mg/L Ammonia, 5mg/L Total Nitrogen, 1mg/L Total Phosphorus in Far North Queensland. -
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Palm Island STP Major Upgrade
Process, Mechanical, Civil, Hydraulic, Electrical and Controls Design and Commissioning of a new 4,000 EP SBR in North Queensland. -
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Nambour MBR Plant Major Upgrade
Provision of Technical Advisory Services to Unitywater for the 40,000 EP Upgrade in the Sunshine Coast. -
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Membrane Maintenance
Maintenance of UF membranes, including Siemens Memcor and Zeeweed, at several sites -
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Membrane Bioreactor Upgrade
Technical Advisory Services for the upgrade of an oxidation ditch to a MBR for a major mining company in Far North Queensland. -
Childers STP Major Upgrade
Detailed Design and Tender Documentation for a major upgrade to a Sewage Treatment Plant in Queensland (current Project) -
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GIN Gin STP Major upgrade
Detailed Design and Tender Documentation for an upgrade of a trickling filter to a SBR in Queensland (Current Project) -
Water Treatment
Molendinar WTP Backwash Upgrade
Branyan Water Treatment Plant Upgrade
Remote Communities Water and Wastewater Condition Assessments - Queensland Government
Herberton WTP Upgrade
Esk Intake Tower
Mudgeeraba WTP Sludge Handling Upgrade
Mudgeeraba Clarifier Upgrade
Nhulunbuy (Gove) Water Supply Chlorination Upgrade
Landers Shute Ozone
Town Water Disinfection Upgrades -
Raw Water Pumps and Electrical Upgrade
Chemical Dosing Upgrades
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Molendinar WTP Backwash Upgrade
Process, Mechanical, Civil, Structural and Hydraulic Design of an upgrade to the backwash system, including pumps, blowers, pipework, generator and instrumentation (Current Project) -
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Branyan Water Treatment Plant Upgrade
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Remote Communities Water and Wastewater Condition Assessments - Queensland Government
Condition assessments and upgrade assessments for water and sewage treatment plants for various remote indigenous communities - Palm Island, Torres Strait Islands, Woorabinda, Mornington Island, Doomadgee, Pormpuraaw -
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Herberton WTP Upgrade
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Esk Intake Tower
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Mudgeeraba WTP Sludge Handling Upgrade
Process, Mechanical, Civil, Structural and Hydraulic Design of an upgraded sludge handling facility at the Seqwater Mudgeeraba WTP on the Gold Coast. -
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Mudgeeraba Clarifier Upgrade
GANDEN was engaged to design new stainless-steel launders at the Mudgeeraba Water Treatment Plant on the Gold Coast. -
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Nhulunbuy (Gove) Water Supply Chlorination Upgrade
Investigation, design and documentation of a new chlorine gas dosing system for the town of Gove in the Northern Territory. -
Landers Shute Ozone
GANDEN’s role on this project was to undertake detailed design for the replacement of three existing Trailigaz Ozone generator units with three new Wedeco Ozone generator units for the Landers Shute WTP on the Sunshine Coast. This required P&ID, civil, structural and mechanical detailed design drawings outlining the modifications to ventilation, cooling water pumps, plinths and pipework required to install the new Ozone Generators. -
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Town Water Disinfection Upgrades -
GANDEN assisted in the design and installation of sodium hypochlorite dosing upgrades for the town of Weipa, Far North Queensland. -
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Raw Water Pumps and Electrical Upgrade
Mechanical and electrical review and documentation for new raw water pumps and VSDs in NSW. -
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Chemical Dosing Upgrades
Upgrade to Carbon Dioxide, Soldium Hydroxide and Aluminium Chlorohydrate dosing systems at a water treatment plant in NSW -
Desalination
Sydney Desalination Plant Storm Recovery
Desalination Options Study NSW
San Andrés Desalination Plant (Colombia)
Amrun RO Plant Expert Review
Ballina Effluent Reuse Study
Palm Island Emergency Desalination
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Sydney Desalination Plant Storm Recovery
On 16 December 2015, the Sydney Desalination Plant suffered severe damage from a tornado. GANDEN personnel were seconded into a team of specialist technical advisors to assist the insurance loss adjusters. GANDEN also had people on site designing and operating a temporary SBS dosing system to ensure the $55m worth of RO membranes were preserved. GANDEN’s assessment of the storm damage to the main process building of the desalination plant was that the reverse osmosis membranes were at risk due to the draining of sodium bisulphite preservation solution. GANDEN designed a temporary SBS batching and dosing system that enabled the reverse osmosis system to be refilled. These actions saved the membranes and prevented a substantial claim for loss of the membranes. -
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Desalination Options Study NSW
Study of desalination options for a Water Authority in northern NSW -
San Andrés Desalination Plant (Colombia)
GANDEN provided expert process review of the design of a new 50L/s desalination plant for the Colombian Caribbean Sea island of San Andrés. -
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Amrun RO Plant Expert Review
Third Party Expert Review of a New reverse osmosis desalination plant treating brackish water and of a new sewage treatment plant for the $2b Amrun mine expansion in Far North Queensland. -
Ballina Effluent Reuse Study
Ballina Shire Council’s effluent reuse scheme is designed to provide recycled water to a portion of Ballina’s residential customers, commercial customers and for open space irrigation. Due to the coastal location, the plant influent sometimes has elevated levels of total dissolved solids from salt water inflow into the sewerage system. GANDEN was contracted by Council to develop, assess and compare a range of feasible options and recommendations for the on-site desalination of recycled water at Ballina WWTP to meet the TDS limit imposed by Council. Options considered included reverse osmosis, nanofiltration, electrodialysis reversal, capacitive deionisation, ion exchange, thermal distillation and solar distillation. -
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Palm Island Emergency Desalination
Due to drought conditions causing low levels in the two town’s water supply dams, the Queensland Department of Infrastructure, Local Government and Planning required an emergency desalination scheme to be investigated and tendered for the town. GANDEN provided technical advice for the investigation of the intake, outfall and treatment plant site options. GANDEN also wrote the technical specification for the tender documents and assisted in the evaluation of the tenders. -
Water Distribution
Beaudesert WTP Water Storages
Narrabri Water Supply Augmentation
Gold Coast Water Recycled Water Mains Replacement
Proserpine to Cannonvale Pipeline and Pump Station
Water Tower Condition Assessment
Beechwood Water Supply Pipeline Design
Pormpuraaw Reservoir Design and Documentation
Gold Coast Recycled Water Main
Palm Island Water Supply
Oxley Highway Pipeline Relocation Design
QUU Potable Water Boosters
Gilston Reservoir Reclorination
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Beaudesert WTP Water Storages
Provision of 5.1 ML of additional water storage for the Beaudesert Water Treatment Plant for Seqwater. Scope included design of sewer diversions, reservoirs, drainage and access roads -
Narrabri Water Supply Augmentation
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Gold Coast Water Recycled Water Mains Replacement
Design of a replacement of a Y junction. This project required high dimensional accuracy as the shutdown window was short. This was achieved using laser scanning of the existing pipe, then scanning of the constructed pipe in the workshop. This scanned data was then input into the model to check the manufacture of the pipe before dispatch to site. The construction was performed without any site modification. -
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Proserpine to Cannonvale Pipeline and Pump Station
Design and documentation of a pump station and 10 km 500 DICL pipeline, including hydraulic modelling using Bentley WaterCAD and water hammer analysis using WATHAM. -
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Water Tower Condition Assessment
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Beechwood Water Supply Pipeline Design
Civil design and documentation of a new water main approximately 6km in length from the existing Rosewood reservoir to Beechwood village. The main included approximately 410m of DN600 DICL and approximately 5400m of DN200 (various materials), including an under bore of the Hastings River. -
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Pormpuraaw Reservoir Design and Documentation
Tender design and documentation of the concrete reservoir including SCADA upgrades, gas chlorine dosing system, site earthworks/landscaping, and galvanised steel framed roofing. Pormparaaw is a remote indigenous community in Far North Queensland. -
Gold Coast Recycled Water Main
GANDEN provided detailed designs and documentation for a new DN750 MSCL recycled water pipeline across Coombabah Creek and demolition and removal of redundant assets. -
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Palm Island Water Supply
GANDEN was engaged to assess the capacity and condition of the existing Palm Island water supply infrastructure including the: - Water supply dam capacities and operation, The water treatment plant and The water distribution network, including producing a network model. As part of the town water and sewerage infrastructure review, GANDEN also reviewed the sewage treatment plant and sewerage network. -
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Oxley Highway Pipeline Relocation Design
Civil design and documentation for relocation of the various pipelines to cater for the Oxley Highway upgrade inland from Port Macquarie. Works included pipeline civil design, hydraulic modelling, specification writing and organising survey, geotechnical and potholing. -
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QUU Potable Water Boosters
Options analysis and detailed design of 2 replacement potable water booster pump stations located in Ashgrove and Toowong in Brisbane. The existing pump stations remained operational during the construction period, with only a small window available for change over. The new pump stations were designed to allow for construction to be completed before the existing pump stations were taken off line. Both pump stations are located in constrained spaces within road reserves and in close proximity to existing houses, parkland and the Toowong cemetery. Consultation was undertaken with the Council arborist and parks officers to ensure the protection of existing trees and to select a location which minimised the impact on public amenity. A low profile retractable acoustic cover was incorporated into the design to provide weather and and vandalism protection and to minimise the noise and visual impact on the surrounding residents. In order to accommodate large variances in flow rate and head, a 4 pump arrangement was adopted at both sites, with one small jockey pump for overnight low flow periods and 3 large pumps for day time and fire flow operation. -
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Gilston Reservoir Reclorination
The City of Gold Coast (Gold Coast Water) required a re-chlorination facility on its reservoir at Gilston. GANDEN provided the concept design and documentation and assisted Gold Coast Water throughout the detailed design review and construction period.
Sewerage Networks
Metropolitan Wastewater Program
Howard SPS and Gravity Sewer
Cairns SPS ED6, R19 & SH1 Upgrades
Cairns SPS B2, B3, T14 & R28 Upgrades
Sydney Water Mascot OCU
Gold Coast Sewer Rising Mains RPEQ
Gold Coast Water Emergency Storages
Brisbane Sewer Doors
Weipa Pump Station Upgrades
Palm Island Sewer Network Review and Hydraulic Modelling
Cairns Pump Stations Condition Assessments
Toowoomba SNEP
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Metropolitan Wastewater Program
GANDEN has teamed with Urban Utilities, Fulton Hogan and SMEC to deliver upgrades to the sewer networks in the Brisbane metropolitan area. GANDEN are providing design and commissioning management services for the five-year program. -
Howard SPS and Gravity Sewer
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Cairns SPS ED6, R19 & SH1 Upgrades
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Cairns SPS B2, B3, T14 & R28 Upgrades
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Sydney Water Mascot OCU
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Gold Coast Sewer Rising Mains RPEQ
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Gold Coast Water Emergency Storages
Design of emergency storages for 11 pump stations around the Gold Coast across 2 packages. -
Brisbane Sewer Doors
The Sewer Doors Project consisted of the design of wedge gate and knife gate valves to be retrofitted to 35 pump stations around the Brisbane area. -
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Weipa Pump Station Upgrades
GANDEN provided project management, full design and commissioning assistance for the upgrade of two pump stations in Far North Queensland. The pump stations were converted from dry wells to wet wells and buildings above demolished. Blockages were a regular occurrence. Since the pump stations were commissioned, there has been no reported blockages. -
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Palm Island Sewer Network Review and Hydraulic Modelling
Provision of technical advisory services -
Cairns Pump Stations Condition Assessments
Condition assessment and upgrade options advisory services for three pumps stations in Cairns, North Queensland. -
Toowoomba SNEP
The Toowoomba Sewer Network Enabling Project comprised the design of three pump stations, emergency storages and rising mains. -
Environmental
Stormwater Treatment Upgrade
Pimpama WRF Membrane Maintenance
Pine Rivers Slope Stabilisation and Pipe Refurbishment
Darwin Odour Control
City of Gold Coast Bin Bays
Moomba Camp STP Environmental Licensing
Fairfield STP Recycled Water Upgrade
South Stradbroke Environmental Licensing
Evapotranspiration Bed Design
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Stormwater Treatment Upgrade
Design and project management of pH and suspended solids control for two stormwater catchments on a refinery for a major mining company. -
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Pimpama WRF Membrane Maintenance
GANDEN provided quarterly maintenance services for the Siemens Memcor ultrafiltration membranes at the Pimpama Water Recycling Facility on the Gold Coast. -
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Pine Rivers Slope Stabilisation and Pipe Refurbishment
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Darwin Odour Control
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City of Gold Coast Bin Bays
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Moomba Camp STP Environmental Licensing
Preparation of documentation to allow the licensing of a new sewage treatment plant and associated effluent irrigation scheme for a mining camp in Moomba, South Australia. -
Fairfield STP Recycled Water Upgrade
Design of recycled water system storage and treatment including Storage Structure, Flow Diversion Chamber, Sodium Hypochlorite Dosing, Transfer Pump Station, Sampling System, Shade Structure and Pipelines. -
South Stradbroke Environmental Licensing
Negotiating the Environmental authority for two membrane bioreactor sewage treatment plants and irrigation disposal operated by Council in a national park. The project required close liaison with the Queensland Department of Environment and Heritage. The scope of work also included MEDLI modelling to determine the size of the effluent irrigation area. -
Evapotranspiration Bed Design
Design of a evapotranspiration bed for effluent disposal, including MEDLI Modeling, for a major mining company.
