Industrial Water Technology
Shahram Tabe, Ph.D., P.Eng.
Separation processes in general are about discriminating
between substances according to their physical and/or
Plate and Frame Module
Every two sheets of membranes face each other separated
by a spacer. Raw water flows between the two sheets,
permeate through the membranes and are collected at the
Packing density: 100 400 m2/m3
Reverse Osmosis Report Rubric: 2015
Abstract: maximum 250 words.
The abstract should convey the
main idea of the report. Any
person should be able to read
the abstract and understand the
main findings and conclusions
outlined in the repo
Guideline for Preparing the Research paper
3,000 words (~6 pages excluding figures, graphs, and tables).
12 references both historic and recent
The paper should include the following sections
Prepared by: [your name and st
Membrane Characterization Methods
Why do we need to characterize membranes?
Characterization correlates membrane properties with
the membrane performance.
Two major membrane properties:
o Structural properties
o Permeation properties
CHE 1150S Ultrafiltration Lab 2015
1. Introduction (adapted from Salem et al. 2010 and Pignat 2013)
Ultrafiltration (UF) is a tangential filtration process. The process separates undissolved
or suspend solids from a fluid, using a membrane. Usually, the s
A New Generation of Membranes:
Electrospun Nanofiber membranes (ENMs)
Conventional MF vs. ENM
How Thin is an ENM
To prepare a nanofiber that would connect the earth and its
moon we only need ~3 g of polymer!
Distance from the earth
Two types of module operation:
Batch of feed is pushed through
Concentrations of feed and
permeate increase with time
Feed flows on one side of
Concentration Polarization and Fouling
As water permeates through the membrane concentration
of solute/particles on the membrane surface increases.
At Steady state a layer forms on the membrane surface