Membrane (RO) simulation

1 feed -> permeate + retentate

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Governing equations

The exact equations the solver works for a membrane (ro) — the same math shown in the app's "Theory" panel, not a black box.

c_{p,i}=(1-\sigma_i)\,c_{f,i},\qquad Q_p=r\,Q_f\;\;(\text{recovery }r,\ \text{rejection }\sigma)

\pi = i\,C\,R\,T,\qquad \text{NDP}=\Delta P_{feed}-\pi>0\;\;(\text{RO feasibility})

Parameters

recovery [0..1 permeate/feed, default 0.5], rejection [0..1 salt rejection, default 0.98], feed_pressure [Pa]; optional solvent [default 'water'], vant_hoff [ions per solute, default 1]; osmotic-pressure feasibility checked (RO rating)

Example flowsheets that use it

RO desalination + ZLD

Open guide

Direct lithium extraction + LiOH crystallization