The Means of Filtration And Purification of Water: Filters

The equivalent – basically – a sieve or a coffee filter equipped with pinholes (or pores) which will hold the impurities and other invisible microorganisms.

The majority of the filters available today have pores ranging in size between 0.1 and 0.3 microns (= 1 millionth of a meter). some going up 15 nanometers (is 15 billionths of a meter). Purposes more the pores of the filter, the more the device will be effective against particles and microorganisms but more filtration operation will take time. The filter, however, will be perfectly harmless against viruses: these are too small to be picked up by the pores of the filter, even the finest. The filter must therefore be associated with another process if conditions so require.

MSR MINIWORKS pump filter

In addition to the diameter of their pores, filters also differ in their material:

  • ceramic: the pores of ceramic filters are usually measured between 0.1 and 0.15 microns, making it a very effective filter. It will then be easy to clean or lead, but it is still very fragile to use. The qualities of the ceramic filter and its high life expectancy make a choice very common among hikers and other outdoor enthusiasts.
  • ceramics with carbon heart: adding a heart of carbon to the traditional ceramic filter allows it to increase its capacity of filtration holding certain chemicals such as chlorine, iodine, herbicides, pesticides and heavy metals. Comfortable advantage: by retaining the chlorine and iodine, the heart of activated charcoal will allow to remove water the taste of pool she could have.
  • fiberglass: a power of retention and a quality equal to the ceramic filter filtration but a much lower life expectancy.

Very fine because of their pores, most of the filters are fitted with a pump system (type bicycle pump) which speeds up the process of filtration, but makes a bit more physical operation! Other filters operate by gravity (with the weight of water) or by aspiration (principle of the communicating vessels or tank that is siphoning).

Filter gravitation Katadyn CAMP

Finally, some filters are mounted directly on a gourd, after a pipette diving inside or installed at the level of the CAP. This is the case for example Of Katadyn MYBOTTLE model or HYDR’ACTIV PURE de Hydratechnic. Here again, more the pores will be fine, it will be difficult to suck water.

Gallery

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