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Nijhuis Saur Industries

Project’s context & challenges

To enhance water security and climate resilience, Singapore developed the Marina East Desalination Plant — the first dual-mode facility capable of treating both seawater and freshwater from the Marina Reservoir. Located in the heart of the city, the plant required a compact, energy-efficient, and future-ready solution to meet the nation’s growing water demands while minimizing environmental impact.

Key figures

308,000 m³/day seawater
Capacity

Customer benefits

Dual-mode operation for seawater and reservoir water

Compact and modular design for urban integration

Optimized chemical dosing with real-time control (i-DOSE)

Robust flotation system for reliable pre-treatment

Supports Singapore’s long-term water sustainability goals

Solution

Nijhuis Saur Industries (NSI), part of Saur Group, designed and delivered eight High Rate concrete i-DAF modules as pre-treatment for the Marina East Desalination Plant. The system includes coagulant and flocculant dosing, top mixers, corrugated plate packs, skimmer systems, and the Nijhuis i-AERATION flotation system. The i-DOSE intelligent dosing control ensures stable effluent quality and optimized chemical usage. The plant integrates ultrafiltration and reverse osmosis for final treatment, enabling dual-mode operation with high efficiency.

Scope of supply

  • Design and engineering of eight i-DAF modules
  • Supply of dosing systems, mixers, and flotation units
  • Installation, commissioning, and project management
  • Integration with ultrafiltration and RO systems

Applied solutions

  • High Rate i-DAF modules for compact pre-treatment
  • i-DOSE intelligent dosing control for chemical optimization
  • i-AERATION flotation system for solids removal
  • Modular concrete design for urban infrastructure
  • Dual-mode treatment capability for seawater and freshwater

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