Process Engineer - Desal

Larsen & Toubro


Date: 5 days ago
City: Riyadh
Contract type: Full time
Key Responsibilities

 Engineering Design & Process Development

  • Develop mass and energy balances, PFDs, and P&IDs for seawater RO desalination systems.
  • Design and size RO trains, pumps, pretreatment units (coagulation, media filtration, UF), and post-treatment (remineralization, CO₂ dosing).
  • Prepare detailed specifications for equipment: pressure vessels, membranes, dosing systems, and chemical treatment units.
  • Analyze and optimize membrane performance using software
  • Perform hydraulic calculations for multiport vessels and high-pressure piping networks.

Technical Analysis & Modeling

  • Conduct system simulations to predict performance under varying feedwater conditions.
  • Perform recovery, energy consumption, and membrane fouling rate analysis.
  • Evaluate energy recovery devices (ERDs) and design pressure exchanger systems.
  • Review and analyze laboratory data, pilot trials, and membrane autopsy reports.

Project Execution & Documentation

  • Review engineering deliverables: design reports, datasheets, BOQs, and technical specifications.
  • Coordinate interdisciplinary interfaces with civil, electrical, instrumentation, and mechanical teams.
  • Participate in HAZOP, design reviews (3D model reviews, RAM studies), and risk assessments.

Commissioning & Troubleshooting

  • Support factory acceptance testing (FAT), site acceptance testing (SAT), and commissioning.
  • Diagnose and resolve process bottlenecks, membrane fouling, scaling, or plant underperformance.
  • Train operations teams on membrane cleaning procedures (CIP), energy optimization, and water quality control.

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