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Membrane separations technology course
News and Views Leachate is fed into the unit u n d e r c o n t i n u o u s pressure, following aeration a n d pH adjustment. As contaminated leachate flows t h r o u g h the columns of discs a n d over m e m b r a n e surfaces it is separated by reverse osmosis into purified water which p a s s e s t h r o u g h the m e m b r a n e , a n d a concentrated waste, rejected by the membrane. Operation of the system is economical b e c a u s e it is automatic with a n integral built in cleaning system. Because the pressurized flow of leachate is made turbulent over the m e m b r a n e surfaces, the t e n d e n c y to scale or foul is greatly reduced. This allows for longer r u n times before cleaning is required. The t r e a t m e n t process is already in use worldwide, particularly in Europe. A recent installation b y Rochem in Germany, at Ihlenberg landfill in Sch6nberg, is treating a leachate feed of 50 000 litres a n h o u r with a recovery rate of over 90%.
Further Information from: Rochem Separation Systems Lid, Wentworth House, I Wentworth Gate, Wetherby, West Yorkshire LS22 6XD, UK. Tel: 0937 584478. Humberside Wastewise Waste Management Services Ltd, Riverview Road, Beverly, North Humberside HU17 OLD, UK. Tel: 0482 883333. Fax: 0482 883325.
Membrane Separations Technology Course A course on the technology of m e m b r a n e separation processes t h r o u g h presentation of the physical principles involved, m e m b r a n e fabrication techniques, a n d plant design m e t h o d s will be held in Amsterdam, The Netherlands, from 2 0 - 2 3 February 1995. The course c a n be attended as a one, three or four day option, covering microfiltration, ultraflltratlon, reverse osmosis, gas separations a n d pervaporation, a n d electrodlalysls.
Further Informatlon from: The Center for Professional Advancement, Oudezgds Voorburgwal 316A, 1012 GM Amsterdam, The Netherlands. Tel: +31 20 638 28 06. Fax: +31 20 620 21 36.
New z e o l i t e membranes formed Researchers at the polymer chemistry group in the School of Chemistry at Manchester University, UK, were working with Unllever on controlling the formation a n d morphology of zeolites when they discovered that they h a d made new zeolite m e m b r a n e s , reports Process Engineering. Previous attempts at m a k i n g zeolite m e m b r a n e s involved allowing the zeolites to settle out onto a support. The m e m b r a n e s formed by this m e t h o d were very thick, a n d were prone to defects a n d fouling. Possible applications of the new m e m b r a n e s could include gas separation reactions s u c h as dehydrogenation, but although early work looks promising further research is needed. If the work is successful, the zeolite m e m b r a n e s should have very high temperature stability a n d selectivity compared with polymeric membranes. However, the flux rates m a y be restricted.
Segment of Rochem membrane module
Further information from: Dr Peter Budd, Department of Chemistry, Faculty of Science, University of Manchester, Oxford Road, Manchester M13 9PL, UK. Tel: 061 275 4600.
Further Information from: Rochem Separation Systems Lid, Wentworth House, I Wentworth Gate, Wetherby, West Yorkshire LS22 6XD, UK. Tel: 0937 584478. Humberside Wastewise Waste Management Services Ltd, Riverview Road, Beverly, North Humberside HU17 OLD, UK. Tel: 0482 883333. Fax: 0482 883325.
Membrane Separations Technology Course A course on the technology of m e m b r a n e separation processes t h r o u g h presentation of the physical principles involved, m e m b r a n e fabrication techniques, a n d plant design m e t h o d s will be held in Amsterdam, The Netherlands, from 2 0 - 2 3 February 1995. The course c a n be attended as a one, three or four day option, covering microfiltration, ultraflltratlon, reverse osmosis, gas separations a n d pervaporation, a n d electrodlalysls.
Further Informatlon from: The Center for Professional Advancement, Oudezgds Voorburgwal 316A, 1012 GM Amsterdam, The Netherlands. Tel: +31 20 638 28 06. Fax: +31 20 620 21 36.
New z e o l i t e membranes formed Researchers at the polymer chemistry group in the School of Chemistry at Manchester University, UK, were working with Unllever on controlling the formation a n d morphology of zeolites when they discovered that they h a d made new zeolite m e m b r a n e s , reports Process Engineering. Previous attempts at m a k i n g zeolite m e m b r a n e s involved allowing the zeolites to settle out onto a support. The m e m b r a n e s formed by this m e t h o d were very thick, a n d were prone to defects a n d fouling. Possible applications of the new m e m b r a n e s could include gas separation reactions s u c h as dehydrogenation, but although early work looks promising further research is needed. If the work is successful, the zeolite m e m b r a n e s should have very high temperature stability a n d selectivity compared with polymeric membranes. However, the flux rates m a y be restricted.
Segment of Rochem membrane module
Further information from: Dr Peter Budd, Department of Chemistry, Faculty of Science, University of Manchester, Oxford Road, Manchester M13 9PL, UK. Tel: 061 275 4600.