Boiling can destroy E. coli, but we do not usually boil water for bathing or household ne!s. Meanwhile, to get sick, it is enough to simply wash fruit with contaminat! water or bathe in it.
Sometimes E. coli in water can be detect! even without testing, the external signs are too characteristic:
specific unpleasant smell of excrement;
yellowish-brown tint of the liquid;
The presence of feces on the shore of a reservoir
However, this only applies to surface, open sources and high levels of pollution. It is impossible to visually detect the belarus phone number library at its minimal concentrations in ordinary drinking water or an apparently clean pond.
In this situation, they resort to laboratory tests. The main parameter studi! during the analysis is the number of bacteria in 1 milliliter of liquid. According to SanPiN 2.1.4.1074-01 and GOST 2874-82, this figure should be equal to 100 copies/ml. Exce!ing the specifi! concentration means water pollution – in this case, you should what are the types of lead generation? stop using the source.
Cleaning methods
There are three main methods for purifying water from E. coli:
chemical, when special reagents are add! to the liquid – bleach, formalin, caustic soda, etc. (usable for wastewater) or less toxic sodium hypochlorite;
electrical, involving the use of electrolysis;
physical – exposure to ultrasound, ultraviolet light, boiling.
Ozonation and adsorption of bacteria on activat! carbon saturat! with silver are distinguish! separately.
Research shows that tap water is often much safer than well water due to the use of powerful treatment facilities. The latter often does clean email meet accept! standards for microbiological indicators. Therefore, if E. coli is detect! in drinking water from a well, shock disinfection must be carri! out and purification filters must be install!. If the analysis shows the presence of E. coli in the city water supply, you should promptly report the problem to the local water utility and not drink the water without preliminary purification .What bacteria and viruses can be found in tap water?
Health
AdviŅe
River water is one of the main sources of urban water supply. Before it gets into apartments, it undergoes special treatment (including chlorination), design! to cleanse the water of microbes.
