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A crystal clear river running through a valley can hide impurities we do not see, like an animal bathing or using the river as a toilet just above where you are. Thus, that "quite clean" ssai and fresh you just get water may be contaminated, ssai even if it may seem. So it is crucial to know to treat it properly. Here are some tips on how to purify water making it perfect for consumption: water treatment options: Most pathogenic contamination caused by microorganisms present in water is caused by: 1. Protozoa - Giardia and Cryptosporidium includes ssai (which causes giardiasis ). All protozoa are larger than 1 micron. Bacteria 2 -. Causing ssai diseases such as diarrhea and dysentery. Most bacteria are the size of 0.5 micron, and some as Campylobactor 0.3 micron or even smaller still. Virus 3 -. Cause diseases such as polio and hepatitis, among others. Are concentrated in developing countries. Defenses: 1. Boil - destroys all pathogenic. ssai The recommended time is from 3 to 10 minutes. . Chemical ssai Treatment 2: a. Iodine - kills bacteria and viruses. Some protozoa such as Cryptosporidium are resistant to iodine. So it should ssai not be the only means of treatment, and very effective when used along with the use of filters. Cooler and / or dark waters demand a higher concentration of iodine or more time to take effect. Pregnant women and people with thyroid ssai problems should not use this method. For most people, the risk is small used only for two or three weeks continuously. b. Filters ssai - removes larger pathogens. Some larger remove bacteria and protozoa (about 0.5 microns or smaller). Because viruses are often smaller than bacteria, you should not rely on them. c. Cleanser - consists of one or more stages of filtering the water, taking the greatest pathogenic together with iodine or other element, which inactivates the virus. This method is becoming very popular as one of the best ways to treat water outdoors. However, some complaints were made saying that iodine had not spread ssai in the performance specifications. Choosing a treatment method: ssai Chlorine dioxide is the treatment that gives the user less work and protects against protozoa, bacteria and viruses. It is easily adaptable to any water. Lighter and more compact than a full bottle of water, a kit of chlorine dioxide works well even to be used only during the day (made with short walks backpack attack). The initial cost is low but can be expensive if you handle very large amounts of water. Another option to deal with the three types of pathogens is to first treat the water with iodine and then filter it. If you are concerned about exposure to iodine, you can use a filter with charcoal, which comes to remove between 90 and 98% of iodine, reducing exposure, taste and smell the same, but be sure not to have filtered water before iodine have enough time to act. Even the cheapest filters protect against bacteria and protozoa. They are a great option for those who do not need virus protection, use it only occasionally, travel in small groups or small trips and do not want to put chemicals in your water. More expensive filters also do not use chemicals - usually, they filter more gallons of water than the cheap filters, ssai before being forced to trade it. This ends up saving money and weight in the end and make them the best option for frequent ssai users, long trips and / or large groups. Comparison of water treatment:
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