Alkimos Wastewater Treatment Plant

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GHD was engaged by the Water Corporation in Western Australia to design the AUD80 million 20 ML/d Alkimos Wastewater Treatment Plant as part of the Alkimos Water Alliance (AWA) comprising Multiplex, McMahon and Zublin.

The design incorporates the main elements of the wastewater treatment process, including two x 50m diameter secondary sedimentation tanks, three x 15ML oxidation ditches, inlet works, sludge thickening and odour control.

As part of our instrumentation and control engineering, we designed the Plant Control System (PCS) over a fibre optic ring topology connecting platform. Work included the design and specification of analyser and pneumatic panels, control and monitoring of instruments and actuated valves, VSDs and smart DOL starter modules, networked via dual redundant fibre optic ring to a series of PLCs and remote I/O units.

High levels of control system availability have been achieved through the use of extensive selective redundancy and fibre optic ring mains.

The project won the IEAust WA Engineering Excellence (Infrastructure and Building) Award in 2012.

Communication Systems

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Whether the requirement is office data and voice networks, specialist industrial systems or broadband high capacity links, our clients benefit from GHD’s integrated services from concept through to commissioning.

GHD uses communications technology extensively for:

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Integrated Water Management

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Integrated Water Management (IWM) is a strategy that brings together all facets of the water cycle — water supply, sewage management, water treatment and stormwater management — to achieve strong triple bottom line benefits.

Around the globe, we now recognise that water demand and water supply are not in balance. Our professionals understand the interrelation and importance of water reuse, stormwater, groundwater and seawater as essential additions to the traditional water sources from dams and rivers. We offer IWM strategies that are inclusive of these sources and provide long-term sustainable solutions.

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Project Management

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GHD procedures and systems facilitate the coordination and control of all phases of project development – for small and large developments.

Our services span feasibility studies, concept planning and financial evaluation and design management. Our EPCM services include contracts administration, procurement, industrial relations, construction management and control of cost budgets, time schedules and quality assurance.

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Wastewater Treatment & Recycling

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Because all wastewaters are different, it is necessary to work with a team that can combine comprehensive knowledge with practical experience in the fields of chemistry, biology, hydraulics, mechanical processes/equipment, instrumentation and control, materials handling and plant layout.

GHD can deliver on all the process components that make up a wastewater treatment plant. We have designed and project managed more than 300 wastewater treatment plants (including major municipal facilities processing 500Ml a day and industrial projects).

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Water Treatment & Desalination

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All untreated water sources have unique water quality characteristics. So we’ve assembled a team with extensive practical experience in water treatment covering chemistry, biology, hydraulics, process selection, control, residuals handling and plant layout.

Our track record includes plant capacities of 0.1 MLD to over 2500 MLD. We’ve dedicated our efforts to more than 300 treatment plants over the past 60 years. Our services include design of water treatment process solutions as diverse as Dissolved Air Floatation Filtration (DAFF), Ozone/Biological Filtration and Desalination (using Reverse Osmosis or Electrodialysis Reversal).

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