Oscillatory crossflow membrane separation

摘要

Oscillatory crossflow membrane separation apparatus and methods are disclosed for effluent treatment. The apparatus include a membrane module with a housing containing a membrane element, said module having an input for receiving effluent for treatment and a treated effluent output. A crossflow pump is connected for moving oscillating fluid through the membrane module and a feed pressure pump is connected with the membrane module for applying membrane operating pressure. A fluid oscillator is active with either pump for pulsating fluid received thereat.

主权项

1. A method for vibratory membrane separation of an effluent fluid to be treated comprising the steps of:
directing effluent fluid to be treated to a membrane separation module having a membrane element oriented so that a fluid column is defined therein, the effluent fluid directed through a fluid feed line at a selected feed velocity providing an effluent stream at a first selected flow volume; applying fluid through a fluid pressure line at said membrane separation module to establish selected membrane operating pressure at a second selected flow volume; and oscillating fluid at one of said lines or said membrane separation module at a selected fluid oscillation velocity greater than said selected feed velocity thereby providing up-stroke and down-stroke oscillations for pulsating combined said first and said second flow volumes of said fluids directed and applied through said lines, said down-stroke oscillations having a shear rate greater than shear rate of said up-stroke oscillations.