EngiMetric
Technology • Treatment process

Pretreatment & Membranes

Unit operations that condition the feed before the main separation step.

Filtration, membrane and exchange steps that sit ahead of a primary separation process. They decide whether the primary process is protectable, and several of them are fully quantified inside EngiMetric today.

6 technologies in this category · 5 with an EngiMetric quantitative model

Media Filtration MMF

Granular-bed filtration that removes suspended solids ahead of a membrane, sized here from design flow, filtration rate and bed geometry.

  • Active
  • Partial
  • mature

Feedwater Screening & Treatment Selection Screening

Compares a stated or measured feedwater analysis against the barriers a desalination pretreatment train can actually contain, raising a candidate only from a fact you supplied or the platform derived — and reporting its own confidence rather than choosing for you.

  • Active
  • Available
  • mature

Ultrafiltration UF

Low-pressure membrane barrier that removes colloids, bacteria and suspended solids ahead of RO or NF, quantified by membrane area, TMP and flux condition.

  • Active
  • Available
  • mature

Nanofiltration NF

Loose-rejection membrane separation between UF and RO, used for hardness reduction and partial demineralisation before an RO stage.

  • Active
  • Available
  • established

Ion Exchange IX / IER

Exchanger-based demineralisation and softening, sized by resin volume, bed area, service flow and regenerant demand.

  • Active
  • Available
  • mature

Cartridge Filtration

Disposable or washable depth filters that protect downstream membranes from particles, ahead of any high-pressure stage.

  • Information only
  • Not quantitatively modeled
  • mature

Calculate or design with these technologies

Calculators for this area

  • RO Salt Rejection CalculatorCalculate membrane salt rejection percentage from feed and permeate TDS concentrations.
  • RO Salt Passage CalculatorDetermine salt passage percentage through RO membranes and verify complementary rejection balance.
  • RO Permeate TDS CalculatorProject expected permeate total dissolved solids based on feed water salinity and rejection specs.
  • RO Design StudioBuild a preliminary RO system design with feed inputs, staging, custom membrane data, sequential element estimates, balances, and warnings.
  • RO Mass Balance CalculatorSimplified TDS-based dissolved-solids balance for RO feed, permeate, and concentrate flow and quality checks.
  • 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.

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