an advanced water treatment technique involving the filtration of water via membranes with pores that are some 10,000 times smaller than those of human skin. By removing all particles of a size greater than 0.01 microns (pollen, algae, parasites, bacteria, viruses, germs and cysts), it enables the production of ultra-pure water.
A membrane filter process used for the removal of some organic compounds in an aqueous (watery) solution. Found in: Operation of Wastewater Treatment Plants, Vol I & II Advanced Waste Treatment Pretreatment Facility Inspection
The process of removing water from the blood during dialysis by exerting positive or negative pressure on the blood in the artificial kidney.
Removal of fluids and solutes from the blood by using pressure to transfer the blood across a semipermeable membrane.
A membrane separation technology that separates components from process streams by retaining target compounds and allowing the passage of the remaining process solution through membrane pores of a specific submicron size.
Pressure-driven membrane process used to retain macro solutes with a minimum molecular weight of 1000-1500 Dalton. Frequently used as a pretreatment to RO systems.
Filtration under pressure used to concentrate culture medium as a preliminary to product extraction.
MS = The separation of particles from a suspension by passage through a filter with very fine pores. In ultrafiltration the separation is accomplished by convective transport; in DIALYSIS separation relies instead upon differential diffusion. Ultrafiltration occurs naturally and is a laboratory procedure. Artificial ultrafiltration of the blood is referred to as HEMOFILTRATION or HEMODIAFILTRATION (if combined with HEMODIALYSIS). AN = NIM; ultrafilt of blood is indexed under HEMOFILTRATION or HEMODIAFILTRATION if combined with hemodialysis UI = D014462
Is a type of membrane filtration in which hydrostatic pressure forces a liquid against a semipermeable membrane allowing only the passage of small molecules. Ultrafiltration only differs from reverse osmosis and microfiltration in the size of the molecules it retains.
Process in which blood entering a dialyzer is placed under pressure to remove excess water.
Process used to remove excess fluid from the blood during dialysis.
High level filtration used for water and wastewater treatment. This method uses very fine pore size membranes which allows selective particles to pass through. Capable of removing suspended solids, bacteria and viruses. Membrane pore sizes are slightly smaller than those used for microfiltration.
the removal of excess water from the blood.
It is similar to RO & NF, but is defined as crossflow process that does not reject ions. UF membranes have a larger pore size and therefore require lower operating pressures in 10 to 100 psig range. UF removes larger organics, colloids, bacteria, and pyrogens while allowing most ions and small organics to pass through.
the process of removing water from the blood by exerting positive or negative pressure on the blood during treatment with a dialysis machine or similar filtration device, such as the CHF Solutions Aquadex FlexFlow.
Filtration under pressure, used to concentrate solutions.
A process for filtering water by forcing it through a screen with very small pores. Ultrafiltration falls between reverse osmosis and microfiltration in terms of the size of particles removed, with ultrafiltration removing particles in the 0.002 to 0.1 micron range.
Filtration through a medium (as a semipermeable capillary wall) which allows small molecules (as of water) to pass but holds back larger ones (as of protein).
A process utilising membrane technology to recover usable paint from certain paint wastes, such as surplus spray ("overspray") from wet paint spraying and excess coating ("Cream coat") from Electro-deposition. These wastes are collected in water. Ultra-filtration concentrates the wash water back to the original application constants of the coating. Not only does this system save paint, the water can be re-used and it reduces the waste which has otherwise to be treated and sent to landfill.
A semi permeable membrane capable of the separation of colloidal solids from liquids. Used in the process of reverse osmosis.
removal of fluids by applying a pressure difference at both sides of the membrane.
the separation from a liquid of particles of 0·005-0·1 µm in size by pumping the liquid through a synthetic membrane at high pressure
Filtration through a semi-permeable wall that allows water molecules to pass, but holds back larger ones.
A method of cross flow filtration (similar to reverse osmosis but using lower pressures) which uses a membrane to separate small colloids and large molecules from water and other liquids.
A filtering technique (similar to dialysis) used at the end of cardiopulmonary bypass.Ultra filtration allows excessive fluid and chemicals which contribute to post-operative inflammation to be removed from the circulation. Ultra filtration is performed at the completion of open heart surgery while the patient is still attached to the heart/lung machine.
Industries such as chemical and pharmaceutical processing, food and beverage processing, and waste water treatment, employ ultrafiltration in order to recycle flow or add value to later products. UF's main attraction is its ability to purify, separate, and concentrate target macromolecules in continuous systems. UF does this by pressurizing the solution flow, which is tangential to the surface of the supported membrane (cross-flow filtration).
In biological terms, Ultrafiltration occurs at the barrier between the blood and the filtrate in the renal corpuscle or Bowman's capsule in the kidneys. The Bowman's capsule contains a dense capillary network called the glomerulus. Blood flows into these capillaries through a wide afferent arteriole and leaves through a narrower efferent arteriole.