Download PDF by H. Strathmann (auth.), Professor M. K. Turner (eds.): Effective Industrial Membrane Processes: Benefits and

By H. Strathmann (auth.), Professor M. K. Turner (eds.)

ISBN-10: 1851667237

ISBN-13: 9781851667239

ISBN-10: 9401136823

ISBN-13: 9789401136822

The target of the Technical Advisory Committee, in making plans the c~:>Dtent of this assembly, used to be to demonstrate the variety of separation approaches within which using membranes was once sensible and powerful at an commercial scale. As Professor Strathmann unearths, the marketplace for approach gear outfitted round membranes is now worthy approximately $5x1(f every year, and it appeared very important to study this expertise, and to indicate the course of destiny technical advances. All however the most crucial reader may still locate a few goods of curiosity. The Committee might admit not to fulftlling all of thier goals, even though these delegates who attended the assembly in Edinburgh judged it successful. within the occasion it supplied consultant examples of approaches from the foodstuff and beverage undefined, from water therapy, and from the chemical undefined, of which the removing of alcohol from fermented drinks, shipboard desalination and solvent restoration are 3. the foremost makes use of of charged membranes and sterile techniques aren't lined, nor nine is the biggest industry, $1.2x10 every year, for man made kidney dialysis. even though, it really is attention-grabbing to determine man made kidney now discovering an alternate use as a reactor for the construction of monoclonal antibodies. we're additionally reminded by means of Professor Michel of the significance and potency of ordinary membranes within the kidney below stipulations the place fouling is essential to their functionality and complements their selectivity.

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Extra info for Effective Industrial Membrane Processes: Benefits and Opportunities

Sample text

Pulsed flow may be induced by other means such as vibration of a porous plate above the membrane surface(Charm and Lai, 1971), pump vibration(Nakao, 1979) or ultrasound(Semmelink (1973), Fairbanks (1973), Lozier and Sierka (1985». High frequency vibrations, both electrically and acoustically produced, (Hermann, 1982) have also been investigated for the mitigation of fouling with little if any success. However Wakeman (1986) has used alternating current electrical fields with good success to remove a fouling layer in microfitlration.

Hallstrom and Lbpez-Leiva(1978) describe their own rotary module consisting of an external fixed pressure shell and an internal rotary perforated stainless steel tube which acts as the support for a semipermeable membrane. 7 mm wide annular space forms the holdup volume for the feed/concentrate. This width is typical of such devices and means scale-up to industrial filtration may be difficult. For the ultrafiltration of skim milk they found that significant flux improvements occurred as rotational speed increased.

No limiting flux behaviour was observed within the experimental range of velocity gradients( up to 8000 Is-'). With this device, membranes may be located on both the outer stationary cylinder as well as the inner rotating drum. Rebsamen(1981) describes how the velocity gradient in the annular gap is determined by two important flow directions; namely, the field of vortices caused by the rotation of the inner cylinder and the flow forced by the axial pressure difference along the annular gap. The two overlying velocity fields are governed by stability criteria.

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Effective Industrial Membrane Processes: Benefits and Opportunities by H. Strathmann (auth.), Professor M. K. Turner (eds.)


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