Előadások Osztályvezető: Vaskövi Béláné dr.
All desalination processes involve three liquid streams: the saline feedwater brackish water or seawaterlow-salinity product water, and giardia in drinking water saline concentrate brine or reject water. The saline feedwater is drawn from oceanic or underground sources.
It is separated by the desalination process into the two output streams: the low-salinity product water and very saline concentrate streams. The use of desalination overcomes the paradox faced by many coastal communities, that of having access to a practically inexhaustible supply of saline water but having no way to use it.
Although some substances dissolved in water, such as calcium carbonate, can be removed by chemical treatment, other common constituents, like sodium chloride, require more technically sophisticated methods, collectively known as desalination.
In the past, the difficulty and expense of removing various dissolved salts from water made saline waters an impractical source of potable water.
However, starting in the s, desalination began to appear to be economically practical for ordinary use, under certain circumstances. A by-product of desalination is brine. Brine can also be diluted with treated effluent and disposed of by spraying on other open space areas.
Továbbiak Water contains a number of impurities, of both known and unknown character. Treatment of water is designed to remove one specific impurity or a range of selected impurities of known character. For example, water softening treatment removes calcium and magnesium, which are the hardness-causing impurities. Or, de-ionization treatment removes ionic impurities; such as, sodium ion, chloride ion, copper giardia in drinking water.
Neither water softening nor de-ionization removes bacteria or many industrial organic chemicals, which are not ionized.
You must know what impurities need to be removed, before you can select the proper method of water treatment.
Giardia in drinking water purification is a procedure that extracts pure water from impure water, leaving all kinds of impurities behind, regardless of their character.
For example, reverse osmosis is able to remove: calcium, magnesium, sodium ion, chloride ion, copper ion, as well as bacteria, and vast majority of industrial organic chemicals that are not ionized.
You don't have to know what impurities are present in the contaminated water. You know that the purified water will not contain the impurities.