Freshwater sources like rivers provide raw water that contains a lot of pollutants that make it unsafe; it must be eliminated. For this purpose, the waters will undergo a number of treatments needed to make it drinkable. The screening is the first step in a treatment process, which is to retain any large debris such as sticks, plastic bottles and cans (portable water purifiers for survival). To do this, it sets up a grid system, the spacing is about 50 mm. Once the gates are clogged with waste, a scraper rises along grids and knocked down the waste into a skip which, once full, is obviously to landfill.
After undergoing coagulation treatment, the waters will be transferred to another basin where will actually start accretion. Indeed, nothing prevents the gathering of more then neutralized colloids. We must therefore maintain a slow stirring to encourage accretions. It is accelerated by the addition of polymer, that is to say a large molecule formed by the repetition of basic pattern that traps colloidal materials and agglomerated forming large flakes which settle by gravity. This is the "flock".
For a conventional filtration, the most common materials are sand and anthracite. The sand is used alone as a monolayer or associated with the bilayer in anthracite filters. Biological filtration media (iron removal, manganese removal, nitrification, denitrification) are sand and granular activated carbon. Waters purification (or purification) is the removal of contaminants from raw waters to get waters that is fit for normal domestic consumption or for irrigation of fields and also for industrial uses (eg. For use by establishments for food). With the gradual depletion of natural sources of drinking waters (deep waters), is increasingly resorting to surface waters (seas, rivers, lakes and dams).
In rotation, a portion of drum emerges allowing to free the network from the materials retained by the waters spray. The washing waters is collected in a gutter and sent to sludge line. Sieves and microstacci are constructively similar, differing only in size of holes of filter screens. The passage openings can even a few millimeters so the treatment is more efficient for the fine screening.
The purification is carried out by passing the raw waters (from rivers or lakes) through various types of implants removal of organic and inorganic material. The removal methods used can physical, chemical-physical and biological function of type of substances to be eliminated from raw waters entering the plant. The substances to be removed during the purifying treatment can of natural and man; the first type comprises.
It is therefore necessary to use dynamic settling through which one can act on the trajectory for continuously separating particles of different size and density. This type of separator is also called "lamella clarifier". It significantly improves the speed of settling. Decanters are currently used in small installations, horizontal separators; for very large installations, we prefer decanters powered by this principle but with a functioning a little more optimized. After this very important step in settling, it remains to remove even smaller particles by filtration.
The first filtration principles were inspired by the natural filtering the waters passing through the different layers of Earth, before reaching the "underground tanks." Unfortunately, this process is far too slow to handle large amounts of waters. Note however that the thus filtered waters is often of excellent quality.
Now filters are used batteries according to treatment suffered by the waters before you get to this stage. For a conventional waters treatment plant, various treatments are: rapid mixing with a coagulant, flocculation, sedimentation. Filtration materials encountered in treatment of drinking waters are numerous.
After undergoing coagulation treatment, the waters will be transferred to another basin where will actually start accretion. Indeed, nothing prevents the gathering of more then neutralized colloids. We must therefore maintain a slow stirring to encourage accretions. It is accelerated by the addition of polymer, that is to say a large molecule formed by the repetition of basic pattern that traps colloidal materials and agglomerated forming large flakes which settle by gravity. This is the "flock".
For a conventional filtration, the most common materials are sand and anthracite. The sand is used alone as a monolayer or associated with the bilayer in anthracite filters. Biological filtration media (iron removal, manganese removal, nitrification, denitrification) are sand and granular activated carbon. Waters purification (or purification) is the removal of contaminants from raw waters to get waters that is fit for normal domestic consumption or for irrigation of fields and also for industrial uses (eg. For use by establishments for food). With the gradual depletion of natural sources of drinking waters (deep waters), is increasingly resorting to surface waters (seas, rivers, lakes and dams).
In rotation, a portion of drum emerges allowing to free the network from the materials retained by the waters spray. The washing waters is collected in a gutter and sent to sludge line. Sieves and microstacci are constructively similar, differing only in size of holes of filter screens. The passage openings can even a few millimeters so the treatment is more efficient for the fine screening.
The purification is carried out by passing the raw waters (from rivers or lakes) through various types of implants removal of organic and inorganic material. The removal methods used can physical, chemical-physical and biological function of type of substances to be eliminated from raw waters entering the plant. The substances to be removed during the purifying treatment can of natural and man; the first type comprises.
It is therefore necessary to use dynamic settling through which one can act on the trajectory for continuously separating particles of different size and density. This type of separator is also called "lamella clarifier". It significantly improves the speed of settling. Decanters are currently used in small installations, horizontal separators; for very large installations, we prefer decanters powered by this principle but with a functioning a little more optimized. After this very important step in settling, it remains to remove even smaller particles by filtration.
The first filtration principles were inspired by the natural filtering the waters passing through the different layers of Earth, before reaching the "underground tanks." Unfortunately, this process is far too slow to handle large amounts of waters. Note however that the thus filtered waters is often of excellent quality.
Now filters are used batteries according to treatment suffered by the waters before you get to this stage. For a conventional waters treatment plant, various treatments are: rapid mixing with a coagulant, flocculation, sedimentation. Filtration materials encountered in treatment of drinking waters are numerous.
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