Rectifying dialyzer, bioreactor and membrane

The invention provides dual-skinned membrane useful as one way or rectifying membranes which reduce back filtration of solute molecules in dialysis and which improve nutrient supply and product recovery in membrane bioreactors. The membranes are dual-skinned polymeric materials preferably in the for...

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Bibliographic Details
Main Authors NORMA J. OFSTHUN, RICHARD I. BROWN, LEE W. HENDERSON
Format Patent
LanguageEnglish
Published 14.06.1995
Edition5
Subjects
APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY
BEER
BIOCHEMISTRY
CHEMISTRY
DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY
ENZYMOLOGY
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
METALLURGY
MICROBIOLOGY
MUTATION OR GENETIC ENGINEERING
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
SPIRITS
TRANSPORTING
VINEGAR
WINE
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Summary:The invention provides dual-skinned membrane useful as one way or rectifying membranes which reduce back filtration of solute molecules in dialysis and which improve nutrient supply and product recovery in membrane bioreactors. The membranes are dual-skinned polymeric materials preferably in the form of hollow fibers. The membranes have skins of polymer on the opposite sides with differing permeability to solutes and sieving coefficient characteristics. The skin on each side have pores that are invisible at 10,000 times magnification, the microporous structure between said skins contains pores capable of retaining solutes in a molecular weight range of about 5000 to 200,000 in an increased concentration between the interior and the exterior skins. Improved dialysis devices are formed by using bundles of the hollow fiber membranes as a dialysis means having rectifying properties.
Bibliography:Application Number: CN19941090114