Reverse osmosis is a [purification] process by which water flows over a membrane that blocks contaminants. Reverse osmosis membranes must be cleaned periodically or replaced. This technology wastes significant amounts of water. Reverse osmosis is available as a point-of-use or -entry system.
A process used to purify concentrated solutions (often water with high levels of dissolved salts) in which pressure is applied to the more concentrated (or contaminated) solution on one side of a semipermeable membrane. The result is the movement of solvent, but not solutes, from the more concentrated side to the more dilute side, thus separating clean solvent from the concentrated solution. RF 1) Radio Frequency The energy medium used to heat the susceptor in most epitaxial reactors and in crystal-growing furnaces. Radio frequency means that the energy is transferred at a frequency near the radio transmitting band. 2) Response Factor
A process of filtering tap water for use in the aquarium. Water passes through a membrane which filters out all elements leaving the water very pure. Trace elements you want will have to be adjusted as well as the pH
A process for filtering tap water before it is used in an aquarium. This process generates water slowly and wastes a couple of gallons of water for each gallon of filtered water produced. However it is one of the easiest home methods.
A process used to purify water by forcing contaminated water through a semipermeable membrane. The membrane allows the water molecules to pass through but not the other substances contaminating the water. Reverse Osmosis is used to commercially purify sea water as well as by hikers to remove impurities from water found along the trail. [Go to source
A process for filtering tap water before it is used in an aquarium. This process generates water slowly and wastes a couple of gallons of water for each gallon of filtered water produced. High-pressure water is forced through a membrane, which allows particles of water (and very few other elements) to pass through while the excess is carried off by the wastewater current.
The application of pressure to a concentrated solution which causes the passage of a liquid from the concentrated solution to a weaker solution across a semipermeable membrane. The membrane allows the passage of the water but not the dissolved solids. The liquid produced is a demineralized water.
also known as hyperfiltration, has the best purification capability for drinking water. Reverse osmosis removes ions from water including salt from seawater, particles, and bacteria by use of membrane filtration.
a membrane process than removes very small molecules, such as water - used to concentrate fluids as an alternative to evaporation
RO, A treatment technology used to remove inorganic contaminants, where water with a low level of total dissolved solids passes through a semipermeable membrane into a solution containing a higher level of total dissolved solids; pump pressure is applied to the concentrated solution causing it to flow back across the membrane. Back to the top
A technology used to purify water by removing the salts from water. Osmosis involves the diffusion of water from a dilute to a concentrated solution across a semipermeable membrane which allows only the passage of water. In reverse osmosis, water is forced through a semipermeable membrane from a concentrated solution to a stream of purified water. For example, in the desalinization of seawater, reverse osmosis is used to separate the salts from the water. Reverse osmosis of seawater generates drinking water and a residue of salts.
or RO: One of several fairly new winemaking tricks that are used to remove water from wine, in order to make it more concentrated and rich. Purists hate this kind of manipulation, viewing it as the McDonaldization of wine. We're not quite sure what to make of it, but we do like tossing the phrase into casual conversation once in awhile to see if people are listening.
equipment used to remove minerals from water; water is forced through a differentially permeable membrane by pressure; the mineral elements cannot pass through the membrane and are flushed from the outside to waste
Method of removing metal ions from an aqueous solution via semi-permeable membranes.
A method for filtering water.
(RO) A method of removing salts or other ions from water by forcing water through a semi-permeable membrane.
fresh water is forced through a semi-permeable membrane in the direction opposite to that ocurring in natural osmosis, which is high to low.
The process of pressurizing a saline solution to force it through a semi-permeable membrane and separate water from solutes.
Reverse Osmosis units remove most inorganic chemicals such as salts, metals and minerals as well as microorganisms and many (but not all) organic compounds. Reverse Osmosis units are often used in conjunction with mechanical and activated carbon filters. Reverse Osmosis units use large amounts of water, usually 75% is discarded with the contaminants.
process by which water is reduced to a non-mineral state by passing through a plastic membrane under pressure, which separates the water from other elements.
A water treatment method used to remove dissolved inorganic chemicals and suspended particulate matter from tap water before it is used in an aquarium. Water, under pressure, is forced through a semi-permeable membrane that removes molecules larger than the pores of the membrane. Large molecules are flushed out as wastewater. Smaller molecules are removed by an activated carbon filter. Reverse Osmosis works slowly, sometimes as slow as 10 or 15 gpd (gallons per day, and wastes a couple of gallons for every gallon of filtered water produced. Notwithstanding, it is perhaps the best method for tap water purification.
A process of desalination where pressure is applied continuously to the feedwater, forcing water molecules through a semipermeable membrane. Water that passes through the membrane leaves the unit as permeate or product water; most of the dissolved impurities remain behind and are discharged in a brine or waste stream.
A process of desalination where pressure is applied to the feedwater, forcing the water molecules through a semipermeable membrane. The water that has passed through the membrane leaves the unit as product water, and most of the dissolved impurities remain behind and are discharged in a waste stream.
treatment that uses a very fine molecular sieve that permits water to pass through but not contaminants. Useful for nitrate removal. List of Glossary Terms
water that has had all contaminates and salts removed.
Applied pressure in excess of osmotic pressure forces water through a semipermeable membrane from a region of high salt concentration to a region of lower salt concentration.
The process of removing salts from water using a membrane. Pressure from a pump is used to reverse the normal osmotic process resulting in the solvent moving from a solution of higher concentration to one of lower concentration. The water passes through a fine membrane that the salts are unable to pass through, the remaining salt waste (brine) is removed.
Used to purify water and remove salts and other impurities. It is amongst the finest forms of filtration known. The process involves forcing water through a membrane to allow the removal of particles as small as ions. The biggest hurdle is pre-treatment for removal of suspended solids and turbidity to a level suitable for trouble-free RO.
Reverse Osmosis (RO) - Water treatment used to remove dissolved inorganic chemicals and suspended particulate matter from a water supply. Water, under pressure, is forced through a semipermeable membrane that removes molecules larger than the pores of the membrane. Large molecules are flushed into waste waters. Smaller molecules are removed by an activated carbon filter.
A water treatment method whereby water is forced through a semipermeable membrane which filters out impurities.
a process used to desalinate seawater. Water flows through a long tube with layers of material inside which removes salt as the water passes through.
A water purification process used to remove salts, such as for sea water. The process yields drinking water and salt residues.
A process for the removal of dissolved ions from water in which pressure is used to force the water through a semipermeable membrane which will transmit the water but reject most other dissolved materials.
A process in which, if pressure is put on the concentrated side of a liquid system in which liquids with different concentrations of mineral salts are separated by a semi-permeable membrane, molecules of pure water pass out of the concentrated solution to the weak or fresh-water side. The reverse osmosis membrane is permeable to the solvent but impermeable to most dissolved species, both organic and inorganic.
Membrane separation process whereby a solvent is recovered from a solution. Permeability of the membrane is naturally very low since solutes are to be retained and the normal osmotic pressure effect has to be overcome because the pressure required to cause the solvent to flow is high. To help the permeability, membranes are thin and it is necessary to support them well. They can be cast on porous tubes or as hollow fibre's and these forms are convenient for giving large areas as well as strong configurations, There is a constant flow across the membrane to prevent build up of solid particles. The purified liquid is known as permeate and is almost always the desired product although proposals for using the concentrate, e. g. in fruit juices, have been investigated. See osmosis.
(RO) A process to filter tap water before using in the aquarium.
Reverse Osmosis is the reversal of the natural flow of Osmosis. In a water purification system, the goal is to extract pure water from salty or contaminated water. By applying pressure on the contaminated side, the semi-permeable membrane screens out the impurities, but lets water molecules pass through.
A mechanical means of removing some of the water from the sap before boiling.
describes a separation process. A solution is separated from pure liquid by a semipermeable membrane, and a pressure applied across the membrane drives the separation, e.g. desalination
Is the separation of one component of a solution from another component by flowing the feed stream under pressure across a semipermeable membrane to provide a purified stream of water. RO removes most organic compounds and up to 99% of all ions, viruses, bacteria and pyrogens. It is a more energy efficient process compared to phase change processes (distillation).
A filtration process that removes dissolved salts and metallic ions from water by forcing it through a semipermeable membrane. This process is also highly effective in removing microbes from water.
Passing water through a semi-permeable membrane so that it is absolutely pure. aline Water with contains salt.
A membrane separation process designed to treat wastewater containing a variety of contaminants including organic compounds.
The application of pressure to a concentrated solution which causes the passage of a liquid from the concentrated solution across a semipermeable membrane. The membrane allows the passage of the solvent (water) but not the dissolved solids (solutes). The liquid produced is demineralized water. Also see osmosis.
A process used to remove excess alcohol from wine made from intentionally overripe grapes.
Also refered to as RO units. This is a purification method for tap-water. Prefiltered tap water is pushed through an osmotic membrane. Water that makes it through is considered pure, while water that does not, is discharged as a waste stream. This is one of the better, but slowest and most wasteful, methods of tap water purification. RO units produce purified water at extremely low volumes, sometimes as low as 5 to 10 gpd (gallons per day) while creating a waste stream of up to ten times that volume. RO units are refered to a "percentage filters" due to their ability to remove only a "percentage of contaiminants".
RO systems use pressure to force water molecules through a membrane, causing contaminants to be left behind and separated from the water. These systems are very effective, especially for removal of heavy metals, nitrate, fluoride, and pesticides, but they are more expensive both in terms of equipment, maintenance costs, and water usage than other systems. They are also limited in their ability to produce water over a given period of time. Due to these critical factors, it is very important to verify that your water quality requires RO.
A process for reducing the mineral content of water by forcing it to flow under pressure through a semi-permeable membrane. The membrane allows the water to pass through, but not the dissolved solids.
The removal of organic and suspended impurities from water by the use of one or more semi-permeable membranes.
(Water & Water Treatments) The principle of RO is to force water against a semi-permeable membrane that only allows water to pass through. The membrane prevents any dissolved solid from passing through. RO units require a pre-softened supply to prevent “clogging” of the membrane and the system can be expensive to maintain. RO units are most commonly found in laboratories. Larger systems can be found to treat de-salinate water around the world where there may be a water shortage.
the use of semi-permeable membranes and pressure to overcome osmotic pressure and produce high purity water.
Forcing solvent molecules to flow through a semipermable membrane from a concentated solution into a dilute solution by the application of greater hydrostatic pressure on concentrated side than the osmotic pressure opposing it.
This is a purification method for tap water. Prefiltered tap water is pushed through a reverse osmosis membrane. Water that makes it through is considered pure, while water that does not, is sent through a special tube and is rendered impure. As it relies on water, which is able to pass through the membrane, it also generates a large quantity of "waste" water, which cannot be used. This is one of the best, but slowest methods of tap water purification. Reverse Osmosis units produce purified water at extremely slowly, sometimes as low as 10 or 15 gpd (gallons per day).
A process to reduce mineral content of a water by forcing the water through a semi permeable membrane.
(1) (Desalination) The process of removing salts from water using a membrane. With reverse osmosis, the product water passes through a fine membrane that the salts are unable to pass through, while the salt waste (brine) is removed and disposed. This process differs from electrodialysis, where the salts are extracted from the feedwater by using a membrane with an electrical current to separate the ions. The positive ions go through one membrane, while the negative ions flow through a different membrane, leaving the end product of freshwater. (2) (Water Quality) An advanced method of water or wastewater treatment that relies on a semi-permeable membrane to separate waters from pollutants. An external force is used to reverse the normal osmotic process resulting in the solvent moving from a solution of higher concentration to one of lower concentration.
Compare with osmosis. Solvent molecules flow spontaneously from a dilute solution through a semipermeable membrane to a more concentrated solution (osmosis). In reverse osmosis, pressure is applied to the more concentrated solution to force the flow of solvent to go from more concentrated to more dilute solution. Reverse osmosis is used to produce fresh water from sea water.
A process for filtering water for use in an aquarium. This method works by forcing water under pressure through a special membrane. Reverse Osmosis (R/O) can produce very pure water, but it is a slow process and can only filter small amounts at a time.
A process in which water is forced under a pressure sufficient to overcome osmotic pressure through a semi-permeable membrane, leaving behind most of the impurities, typically 90-98%. Product water quality depends on feedwater quality.
Type of membrane separation in which pores are .0005 to .0025 microns. Used to recover nickel, nickel sulfate, copper pyrophosphate, nickel fluoroborate, zinc chloride, copper cyanide, zinc cyanide, and cadmium cyanide.
A process forcing water through membranes that contain tiny holes removing chemicals resulting in pure water.
A process that reverses, by the application of pressure, the flow of water in the process of osmosis so that the water passes from the more concentrated to the more dilute solution through a semi-permeable membrane.
A water treatment method whereby water is forced through a semi permeable membrane that filters out impurities.
Reverse Osmosis is a high pressure filtration process which separates dissolved salt and minerals from water, using a membrane. Clean water passes through the membrane, and the salt and minerals are rejected.
the process of removing minerals from water, which is forced by pressure through a differentially permeable membrane, filtering out the minerals; can happen when growers accidentally apply too strong of a nutrient to a plant's roots, leeching life out of the plant.
A method of separating water from dissolved salts by passing feedwater through a semipermeable membrane at a pressure greater than the osmotic pressure caused by the dissolved salts.
a filtration method in which water is forced through a semipermeable membrane which rejects contaminants
a high pressure filtration system that uses selectively permeable membranes with extremely small pores to separate ions and particles
the process of turning salt water into freshwater. The salt water is forced under pressure against a membrane that filters out the salt, allowing only freshwater to flow through
A water treatment process that removes undesirable materials from water by using pressure to force the water molecules through a semipermeable membrane.
A treatment process used in water systems by adding pressure to force water through a semi-permeable membrane. Reverse osmosis removes most drinking water contaminants. Also used in wastewater treatment. Large-scale reverse osmosis plants are being developed.
Forcing a liquid through a nonporous membrane, removing particles, along with dissolved molecules and ions. Reverse Osmosis is the finest form of membrane separation and is used to desalinate water for drinking, and prepare ultrapure water for various industries.
Reverse osmosis is the process of pushing a solution through a filter that traps the solute on one side and allows the pure solvent to be obtained from the other side. More formally, it is the process of forcing a solvent from a region of high solute concentration through a membrane to a region of low solute concentration by applying a pressure in excess of the osmotic pressure. This is the reverse of the normal osmosis process, which is the natural movement of solvent from an area of low solute concentration, through a membrane, to an area of high solute concentration when no external pressure is applied.