WATER  

DRA Nexus provides total water and wastewater treatment solutions through EPC/EPCM, Agreed Target Cost (ATC), or BOOM/BOOT/Bespoke project delivery models. Being part of DRA Global enables DRA Nexus to tailor technical and commercial solutions to clients’ requirements, including project finance options.

The organisation has successfully designed and delivered over 350 water treatment solutions for local councils, mining and industrial water treatment projects across Europe, Middle East and Africa.

Whether the goal is to reduce capital or operating costs, comply with environmental standards or to increase efficiency, DRA Nexus’ team of highly skilled engineers, scientists and professional tradespeople work with each client to provide an ideal, bespoke solution to meet each project’s unique requirements.

CAPABILITIES

  • Water Management & Usage Optimisation
  • Groundwater & Hydrological Modelling
  • Biological Water Treatment
  • Mine Water Treatment
  • Industrial Effluents
  • Desalination
  • Recycle and Reuse
  • Ancillary Equipment
  • Membrane Technology
  • Brine Reduction

PROCESS SOLUTIONS

General Water Treatment Unit Operations

  • Chemical conditioning
  • Precipitation
  • Coagulation and flocculation
  • Clarification and thickening
  • Dewatering
  • Filtration
  • Stripping and absorption
  • Aeration and oxidation
  • Carbon absorption
  • Ion exchange
  • Eutectic Freeze Crystallization

Biological Treatment

  • Activated sludge
  • Biological nutrient removal
  • Fermentation
  • Digestion
  • MBR

Package Plant Technology

  • SBR for waste water treatment
  • Clarification and media filtration
  • Containerisation UF and RO plants
  • Factory Trial Assembly and Pre-commissioning

PLANT OPERATIONS

  • Contract Operation and Maintenance
  • Remote and Offsite Monitoring
  • Site based operators
  • Routine maintenance scheduling and repairs
  • Product quality validation
  • Asset management

FEATURED PROJECTS

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Tweefontein

Client: Glencore

Location: South Africa

DRA Nexus was contracted by Glencore to provide a Zero Liquid Discharge (ZLD) solution for their operation at Tweefontein. With extensive experience in mine water reclamation and ZLD applications, DRA Nexus has constructed a 19,400 m3/day water reclamation plant comprising of a 2-stage RO membrane process with inter-stage softening. The brine stream from the 2 stage RO process is treated in a state-of-the-art eutectic freeze crystallization unit where water is recovered leaving only a solid stream as waste. This process configuration achieves a ZLD status.

A potable water supply of 10,000 m3/day is generated by mineralizing and chlorinating the permeate stream. The product water complies with SANS drinking water standard and is supplied to the local municipality.

The high recovery plant is operated by the DRA Nexus operations team.

Apart from the treatment plant, the project included supporting infrastructure such as water retaining structures, offices, control room, laboratories, change houses, and workshops.

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Matla Water Reclamation Plant

Client: Exxaro

Location: South Africa

The project delivered the 10,000 m3/day mine water reclamation plant comprising of a 2-stage membrane process with inter-stage softening to achieve an overall water recovery >96%. The RO permeate is mineralized and chlorinated, complying to the SANS drinking water standard. The plant is operated via an Operations and Maintenance Contract by DRA Nexus.

Early planning and hands on construction management were key to delivering the project in the shortest time possible. The water retaining structures and unit process were prefabricated in our inhouse manufacturing facility and subjected to industry leading quality control procedures and standards before being transported to site. FAT testing of membrane skids and equipment prior to delivery minimized time lost during the construction and commissioning phases.