EngiMetric
Technology • Treatment process

Desalination Technologies

Pressure-driven membrane separation of salts from water.

Reverse osmosis in its seawater, brackish and multi-pass configurations. This is the most heavily engineered part of the platform, and the only route into the Plant Designer.

4 technologies in this category · 4 with an EngiMetric quantitative model

Reverse Osmosis RO

The core desalination technology of the platform: a semi-permeable membrane driven by pressure, with recovery, salt rejection, energy and concentrate all derived by real engines.

  • Active
  • Available
  • mature

Seawater Reverse Osmosis SWRO

RO applied to seawater: high feed salinity, single-pass configuration, and a recovery limited by osmotic pressure and scaling rather than by membrane rejection.

  • Active
  • Available
  • mature

Brackish Water Reverse Osmosis BWRO

RO applied to low-salinity groundwater or reuse water: lower osmotic pressure allows much higher recovery and lower pressure than seawater.

  • Active
  • Available
  • mature

Two-Pass Reverse Osmosis 2P-RO / TPRO

A second RO pass on the first permeate, optionally with interstage recycle, to reach a permeate quality a single pass cannot deliver economically.

  • Active
  • Available
  • established

Calculate or design with these technologies

Calculators for this area

  • RO Recovery CalculatorRO recovery and permeate flow with full water and salt balance closure, concentrate concentration and salt loads.
  • RO Salt Rejection CalculatorCalculate membrane salt rejection percentage from feed and permeate TDS concentrations.
  • RO Osmotic Pressure CalculatorEstimate RO feed osmotic pressure using a simplified van’t Hoff model from TDS, temperature, and solute properties.
  • RO Design StudioBuild a preliminary RO system design with feed inputs, staging, custom membrane data, sequential element estimates, balances, and warnings.
  • RO Scaling Risk & Pretreatment AnalysisScreen CaCO3 scaling risk in RO feed and concentrate using the Langelier Saturation Index (ASTM D3739) and the Stiff & Davis Stability Index (S&DSI) for high-TDS and seawater feeds.
  • RO Energy & Specific Power CalculatorDetermine specific energy consumption (kWh/m³) based on operating pressure and pump efficiency, with optional energy recovery device savings.

Working cases containing these technologies

Synthetic engineering demonstration — not project design data. Each opens in the Plant Designer as an editable design.

Build the whole plant

The Plant Designer places these technologies in a treatment train and derives the balance, requirements and outputs from one engineering model.

Open the Plant Designer RO plant design