Time to reduce by 90%: The Dezimalreduktionszeit is the time, in the 90% die of a population. Is the time required, die in the nine-tenths of the population, the population is thus reduced to a tenth, as Dezimalreduktionszeit D (D value).
KBE / CFU: Colony forming unit, colony forming unit. A colony forming unit (CFU or CFU, englisch colony forming unit, CFU) is a parameter, which plays a role in the quantification of microorganisms, namely when the viable cell count of microorganisms in a material is determined culturally.
disinfecting process. The history of mankind is the history of disinfection. Immediately after discovery of fire, the fire was used, boil water to. The high temperatures kill harmful organisms in the water and made the water for people available.
Chlorine is a chemical element with the symbol Cl and atomic number 17. In the periodic table of the elements it is in the 7. main group and heard so together with fluorine, Bromine, Iodine and astatine to the group of halogens. Elemental chlorine is under normal conditions in the form of a diatomic molecule Cl2 gaseous form.
The dosage of liquefied chlorine gas from pressurized containers is widely used in water treatment plants, which have a high consumption of free chlorine.
Checklist Chlorgas plants. The planning and implementation of a chlorine gas system requires the collaboration of various trades. The requirements concerning architectural areas, electric ranges, the water treatment plant, water supply, safety technology, fire protection and much more. From experience, a summary of the requirements of the insurance companies should be led.
The dosage of liquid sodium hypochlorite NaClO purchased is frequently used in smaller water treatment plants, which have a low consumption of free chlorine.
The dosage of solid calcium hypochlorite Ca(ClO)2 it's easier … because it contains a higher proportion of free chlorine and does not disintegrate under favorable conditions. Calcium hypochlorite is the calcium salt of hypochlorous acid with the chemical formula Ca(OCl)2. After the gaseous and liquid products, the first solid chloro-product is treated here. Calcium hypochlorite Ca(ClO)2 according to DIN EN 900 is commercially available as an chlorine preparation in the form of tablets or granules. Roof DIN it contains at least 65 % Chlorine.
The use of trichloroisocyanuric acid tablets … usually takes place there, where no measurement- and control system is available. Trichlorisocyanuric acid (completed: chlorinated isocyanurates) is an organic chlorine product, that works as a depot for free chlorine. The advantage of using trichloroisocyanuric, a permanent (Re-) dosage be unnecessary, is bought with significant measurement errors and mistakes.
Unfallverhütungsvorschrift Chlorination of water UVV d5 with markings, Scope § 1. (1) This accident prevention regulation applies to - chlorination and procedures, where chlorine or chlorine compounds are introduced into water, - hold spaces of chlorination plants, - storage rooms for the used materials to chlorination.
to § 1 Abs. 1: For transportable pressure receptacles shall otherwise the "Regulation on transportable container-filling stations for compressed gases (Druckbehälterverordnung)“.
(2) This accident prevention regulation does not apply to - stationary pressure vessels, - laboratory work with chlorine or chlorine compounds.