Simulation model for optimisation of two-stage membrane filtration plants-minimising the specific costs of power consumption

摘要

A steady-state simulation tool was developed for a two-stage nanofiltration (NF) process with recycling of the retentate from the second filtration state ("feed and bleed" operation). The simulation tool calculates the NF process parameters in dependence on the partial recoveries in both filtration stages. The input for the simulation tool contains six parameters for modelling the filtration performance of NF membranes, process configuration parameters and the specification of a separation problem which consists of system feed flow and concentration, system recovery, maximum permeate concentration as well as maximum partial recoveries.