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Hi RW, your 1. - the isothermal process is called "vapour permeation", a combination of evaporation (in a column or with an evaporator) + isothermal water removal along an hydrophilic membrane. your 2. pervaporation or vapour permeation with a temperature lower than 90°C won't work or at least...

Dear Minani, ENREM (Enhanced Nutrients Removal in Membrane bioreactors) is a European project to demonstrate the faisability of MBR waste water treatment for smaller communities of 250 to 1000 p.e. without industrial wastewater. A demonstration plant should be built in Germany. Some links for...

Dear Minani, you could start with http://www.orelis.com/uk/frame_orelis.asp?path=htm/SS_MB_WM.htm do not hesitate to contact us for more info, pierre.strauch@orelis.de

Adrian, try http://www.smt.sandvik.com/sandvik/0140/internet/se01593.nsf/61daa3aae3283d03c12569ab004f4aaf/3e0c850d5a3c3fd2412567f0003b35a2/$FILE/ATTOIWLA/6%20DIN%20Flanges.pdf regards, Torricelli www.vacuum-guide.com

A good alternative to the pressure swing distillation will be a combination of a distillation and vapour permeation (pervaporation). At atm. Pressure the azeotrope will be around 94% THF / 6% Water. 90% (10% Water) can be reached with a simple distillation. The dehydration from 90% up to 99.5%...

Sulzer Chemtech Membrane Systems offer a debottlenecking solution with pervaporation. Pervaporation is a membrane technology used for the dehydration of bioethanol. It can be used alone (for the dehydration of fuel ethanol from 94 W% to 99.5w%) or in combination (for debottlenecking) with...

Dear jdavis, why not to describe your application and so we could discuss advantages / disadvantages of the pervaporation or vapour permeation. Thanks in advance. Pierre

I do not understand the advantage of a discflo pump for this application but you will find them under www.discflo.com Hope it helps Pierre www.vacuum-guide.com

Dear jdavis PVA-Membranes are not expensive and Pervaporation is used because it is less expensive than other technologies when you have to break an azeotrope. Membrane Systems suppliers (not only manufacturers) are listed under www.membrananlagen.info. hope it helps, Pierre

Dear Dideyjohn, Solvent recovery is an ideal application for a dry (oil free) pump combined with a condenser on discharge. Using an oil lubricated pump, check your starting and shut-down procedure: 15mn preheating will help to avoid solvent condensation in the pump also an N2-purge before...

Dear acfm, A tip speed of min. 15 m/s is required to obtain a stable liquid ring (when using water or similar density, with atmospheric discharge pressure and for 50–100mbarA suction pressure). Smaller liquid ring vacuum pumps are designed to be direct driven with tip speeds of 20-22m/s for...

the easiest way is to ask an ejector manufacturer for a rough sizing, you will find a list of suppliers under www.vacuum-guide.com

During the Achema show being held from May 19th through 24th in Frankfurt, Sulzer Chemtech Membrane Systems will be showing the latest developments in the field of pervaporation and vapor permeation and introducing the new PERVAP-Tools, which can be used with process simulators such as ProII to...

Sulzer Chemtech Membrane Systems in Germany offer complete plants combining destillation + vapour permeation for the dehydration of ethanol up to 99.9% - 99.95%. The consumption is around 0,25 kg Steam per kg Dry ethanol.

you could maybe try with an E-mail using their contact form as under http://www.arpuma.de/Kontakt/kontakt.html. Regards.