(3) The operation of filtration and washing is very important.
The municipality owns its waterworks and filtration plant.
The city added to its waterworks a filtration plant, with a total capacity of 150,000 gal.
There are pumping works and filtration beds for the water-supply of London.
Sand filtration, even when working in the best possible manner, falls short of the perfection necessary to prevent the passage of bacteria which may multiply after the filter is passed.
In many processes of chemical technology filtration plays an important part.
In connexion with the water works there is a good filtration plant.
the separation of organic substances by filtration under high pressure through a colloid membrane, gelatine supported in the pores of a porcelain filter being usually employed.
After filtration the water is pumped to the storage tanks.
The city owns a fine water-supply and a filtration plant covering 20 acres, with a capacity of 30,000,000 gallons daily and storage reservoirs with a capacity of 2 2 7,000,000 gallons.
In some cases the operation of filtration is performed for the sake of removing impurities from the filtrate or liquid filtered, as in the purification of water for drinking purposes; in others the aim is to recover and collect the solid matter, as when the chemist filters off a precipitate from the liquid in which it is suspended.
The water supply is derived from the Maumee river and is filtered by a municipal filtration plant.
A lately discovered effect of sand filtration is a matter of great importance in connexion with the subject of aqueducts.
filtration over charcoal or bleaching earth, are chiefly methods based on bleaching by means of oxygen or by chlorine.
This is heated to boiling, and the residue after filtration contains about 30% of Prussian blue.
As the process continued the salt-saturated layer, incapable of further effective filtration, grew in thickness downwards, until in the process of time it filled the whole mass of sandstone.
Judging from the best observations that have been made on a large scale, the highest rate of efficient filtration when the surface film is in good condition is about 4 in.
Moreover, if a natural water is so liable to pathogenic pollution as to demand filtration of this kind, it ought at once to be discarded for an initially pure supply; not necessarily pure in an apparent or even in a chemical sense, for water may be visibly coloured, or may contain considerable proportions both of organic and inorganic impurity, and yet be tasteless and free from pathogenic pollution.
The city owns and operates its watersupply system (with an excellent filtration plant installed in 1904) and its gas and electric lighting plants.
Crude acetone may be purified by converting it into the crystalline sodium bisulphite compound, which is separated by filtration and then distilled with sodium carbonate.
above the river; and there is a slow sand filtration plant for the filtration of the entire supply.
This dam has been in satisfactory use since 1885, and the slight filtration through the masonry which occurred at first is said to have almost entirely ceased.
Yet it cannot be too constantly urged that such filtration depends for its comparative perfection upon the surface film; that this surface film is not present when the filter is new, or when its materials have been recently washed; that it may be, and very often is, punctured by the actual working of the filters, or for the purpose of increasing their discharge; and that at the best it must be regarded as an exceedingly thin line of defence, not to be depended upon as a safeguard against highly polluted waters, if a purer source of supply can possibly be found.
Attempts have been made, by adding certain coagulants to the water to be filtered, to increase the power of sand and other granular materials to arrest bacteria when passing through them at much higher velocities than are possible for successful filtration by means of the surface film upon sand.
The space below the sieve thus formed is connected by means of an outlet tap with a closed tank, and this again communicates with a vacuum pump. By this means the filtration is quickened by the atmospheric pressure, and goes on very rapidly, as also does the subsequent washing.
A new field of inquiry was, however, opened up when, by filtration a bacterium-free toxic fluid was obtained which produced the important symptoms of the disease-in the case of diphtheria by P. P. E.
No public supply should be open to any such doubt as ought to, or may, deter people from drinking the water without previous domestic filtration or boiling.
But before this was accomplished the filtration of the effluent became defective, and brackish water was received, which rapidly increased nearly to the saltness of the inflow.
Some of the more viscous crude oils obtained in the United States are employed as lubricants under the name of " natural oils," either without any treatment or after clarification by subsidence and filtration through animal charcoal.
The Lamellibranchia have markedly diverged from the original type by the adoption of filtration as a method of feeding.
in diameter and filtered through a sand filtration plant.
To accelerate the rate of filtration various devices are resorted to, such as lengthening the tube below the filtering material, increasing the pressure on the liquid being filtered, or decreasing it in the receiver of the filtrate.
It would appear to be impossible with any water that requires filtration to secure that the first filtrate shall be satisfactory if filtration begins immediately after 'a filter is charged; and if the highest results are to be obtained, either the unfiltered water must be permitted to pass extremely slowly over the surface of the sand without passing through it, or to stand upon the sand until the surface film has formed.
Filtration in the chemical laboratory is commonly effected by the aid of a special kind of unsized paper, which in the more expensive varieties is practically pure cellulose, impurities like feric oxide, alumina, lime, magnesia and silica having been removed by treatment with hydrochloric and hydrofluoric acids.
Occasionally filtration into a vacuum is practised, but more often, as in filterpresses, the liquid is forced under pressure, either hydrostatic or obtained from a force-pump or compressed air, into a series of chambers partitioned off by cloth, which arrests the solids, but permits the passage of the liquid portions.
Starling does not accept this view, and cannot regard as an article of faith Heidenhain's dictum that normally filtration plays no part in the formation of lymph.
In regard to the purification of water, filtration was long looked upon as merely a mechanical process of straining out the solid particles, whereby a turbid water could be rendered clear.
Support is found for this opinion in Beyerinek's discovery that the juices of tobacco plants affected with the disease known as " leaf mosaic," will induce this disease after filtration through porcelain.
Heidenhain, on the other hand, rejected entirely the filtration view of lymph-formation, believing that the passage of lymph across the capillary wall is a true secretion brought about by the secretory function of the endothelial plates.
In some cases purely mechanical means such as the use of Spanish clay or filtration are employed for fining purposes.
In the separation of the constituents of the complex mixture of oxides obtained from the " rare earth " minerals, the methods generally forced upon chemists are those of fractional precipitation or crystallization; the striking resemblances of the compounds of these elements rarely admitting of a complete separation by simple precipitation and filtration.
The sulphates are treated with water, which dissolves the uranium and other soluble salts, while silica, lead sulphate, &c., remain; these are removed by filtration.
The latter operation furnishes an intimate mixture of the carbonate with charcoal, from which the carbonate is extracted by lixiviation with water and filtration.
The calcium carbonate, being insoluble, is easily separated from the caustic liquor by filtration.
If calcium chloride be used the precipitated calcium sulphate must be removed by filtration.
By growing this bacillus in broth a toxin is formed which remains in solution and can be separated from the bacilli themselves by filtration.
The insoluble matter is treated with a hot solution of alkaline ammonium acetate, which dissolves the lead sulphate, the other materials being separated by filtration.
Where, therefore, there is animal pollution of any kind, more especially where there is human pollution, generally indicated by the presence of bacillus coli communis, purification is of supreme importance, and no process has yet been devised which, except at extravagant cost, supersedes for public supplies that of properly-conducted sand filtration.
Even the growth of the well-known nodular incrustations in iron pipes is much reduced by sand filtration.
The liability to this appears to be entirely removed by efficient sand filtration.
ADF can interact with either monomeric or filamentous actin to give a complex which can be isolated by gel filtration chromatography.
Dead, microscopic algae will clump together into particles large enough to be removed by filtration.
See also biological filtration and ion exchange for methods to remove ammonia from the water.
This complex included a larger aviary with two ponds of differing depths, the water circulating through the aviary via an external filtration bed.
In contrast, a large bullfrog 's tank will need daily water changes or a filtration system.
Mulch improves water filtration into the soil and prevents the compaction and erosion that heavy rainfall can cause.
The factory discharges its effluent to sewer following partial treatment using dissolved air floatation (DAF) technology and high rate filtration.
Procedure: The eluted fractions from the Ni-affinity Histrap columns were loaded on the gel filtration column in GF buffer at 0.80 ml/min.
gel filtration chromatography.
glaucoma filtration surgery.
Examples of such technologies include heat shields, water filtration systems, and the famous zero-gravity space pen.
Established in 1997 the customer base spans offshore, sub-sea, automotive, filtration and now medical.
microscopic algae will clump together into particles large enough to be removed by filtration.
We do this by using a technique called reverse osmosis which is a filtration process.
Reverse osmosis a high pressure filtration system that uses selectively permeable membranes with extremely small pores to separate ions and particles.
Without good pond filtration your pond filtration your pond will sooner or later become a death trap for your fish.
At the heart of the koi pond At the heart of a koi pond is the filtration system.
removed by filtration.
It also allows the rapid resumption of filtration once the settlement chambers have been purged.
It is probably also cleared by glomerular filtration, and can be used for renal scintigraphy.
Many did not know that certain filtration media can cause the lung disease silicosis.
Methods for removing suspended solids: screening and grit removal, sedimentation, filtration.
stands in marked contrast to oil and fuel filters where there is a relatively large amount of information regarding filtration requirements and capabilities.
tryptophan levels in the vat are high enough, the solution is purified by filtration.
vacuum cleaner made for ease of use, high filtration, and durability.
There are several materials now in use possessing remarkable power to decolourize clarify, chemically purify and oxidize water; but they are too costly for use in connexion with public water supplies unless a rate of filtration is adopted quite inconsistent with the formation of a surface film capable of arresting micro-organisms. This fact does not render them less useful when applied to the arts in which they are successfully employed.
Whether you install a faucet filter or a whole house water filtration system, you'll be able to enjoy clean and healthy water directly from your faucets any time you want it.
It is an Integrated salt water aquarium system complete with filtration, lights and cabinet.
Some bitters are prepared by simple maceration and subsequent filtration (see Liqueurs), others by the more complicated distillation process.
This stands in marked contrast to oil and fuel filters where there is a relatively large amount of information regarding filtration requirements and capabilities.
When the tryptophan levels in the vat are high enough, the solution is purified by filtration.
Bosch high filtration vacuum cleaner made for ease of use, high filtration, and durability.
The engineers' newest project is to devise a more efficient water filtration system.
More advanced coffee makers will have water filtration systems to remove the chlorine and lime from tap water.
A water filtration system is the number one absolute must component that you must purchase along with the aquarium.
Speak with a salesperson at the pet store you're shopping in about which water filtration systems are the easiest to clean.
Industrial demand refers to the need for silver in electronics, water filtration units and other products.
After our system puts the greywater through the filtration and disinfection processes, it can safely be used for flushing toilets and for irrigation systems.
The individual needles don't compact down as they settle which makes for easier water filtration to the soil.
Some other accessories that are becoming more common are colanders, basin racks, rinse baskets, water filtration systems, and disposals.
Any accessories for the sink that might include separate installation, such as filtration systems or disposals.
The biggest difference with the GeoSpring is the air filtration system that uses a compressor and an evaporator to pull ambient heat from the air and transfer it to the water through coils that wrap around the holding tank.
If the original pool price included a cover and filtration system, and the discounted price does not, then you're not really getting a deal after all since you'll have to purchase these necessary accessories separately.
After the liner is set, attach the filtration system, fill the pool with water, and you are ready to swim.
Rotating them back to three and nine o'clock should result in heavier filtration.
Water Filtration - Braun's CaféHouse coffee makers include a built-in Brita water filtration system, allowing you to enjoy the rich taste of coffee made with freshly filtered water.
These vacuums each feature a smooth shifting transmission, and Kirby's proprietary "Micron Magic Filtration".
Micron Magic Filtration ensures that your rugs stay sparkling clean; vacuums equipped with this technology can pick up particles of dust as small as one-third as a micron.
It's an upright vacuum, and has the Kirby certified HEPA filtration.
Both vacuums offer a HEPA filtration system, and a UV light that works to kill germs, bacteria, flea eggs, dust mites, and mold on your floors.
Some even have ultraviolet rays that supposedly kill bacteria and viruses that become trapped in their filtration systems.
A HEPA filtration system is typically a much better solution.
Many consumers are turning to standard HEPA filtration air purifiers as a safer alternative.
Most air purifiers manufactured for use in the home utilize either HEPA filtration or ionization to clean the air.
HEPA, or "high efficiency particulate air" filtration, is capable of removing up to 99.97% of airborne particles that are larger than 0.3 micrometers.
It provides both cleaning and filtration and is done in a compact design that is easy to use.
The air is taken in through a filtration system and these particulates are trapped in the filter.
The filtration system is unique in that the "Easy Empty" canister permits you to change the filter without ever touching the dirt.
Rainbow vacuum cleaners use a water filtration system that's designed to trap dirt and airborne particles that usually re-enter the home's environment with dry filter vacuuming.
The Rainbow vacuum is engineered around a HEPA Neutralizer Filtration System designed to take cleaning to the next level.
The Rainbow's water filtration system captures 99.997 percent (by weight) of typical household dirt and dust.
LTK: Can you tell us about the AirClean™ filtration system?
LD: Independent tests prove that most other vacuums leak dangerous lung-damaging particles, but not a Miele vacuum with advanced AirClean™ filtration.
LD: Yes - all of our canister and upright products offer powerful motors, optional accessories and advanced filtration.
The purpose of an air ionizer is to eliminate pollutants through diffusion, filtration or a combination thereof.
HEPA (High Efficiency Particulate Absolute) inspired models employ a combination of mechanical filtration and diffusion principles to purify the air.
True HEPA: Only consider air purifiers that use true HEPA filtration, not HEPA-type.
Only purifiers that say "True HEPA" use real HEPA filtration.
Other unique features include water filtration, air purification and flush inset design installation.
In this capacity I lead PR and brand experience strategy and execution for the company’s mass brand portfolio including: Whirlpool, Maytag, Amana, and Gladiator GarageWorks, as well as water filtration and Affresh cleaning products.
And, true to the filtration theorem, smaller designers have taken lengths to knockoff the "IT".
Over time, this "filter" can become "clogged", and the filtration system becomes compensated by functioning in a sluggish and inefficient way.
The key differences between French press coffee and coffee brewed in a typical kitchen machine lie in the filtration used.
The tertiary amine is then distilled off, the residual products separated by filtration and finally hydrolysed by a caustic alkali.
395; Runeberg, "Filtration of Albuminous Liquids," Arch.
The systems of filtration employed by the different companies varied in efficacy, but both the Royal Commissions decided that water as supplied to the consumer was generally of a very high standard of purity.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.