How to purify water in minimum cost ? ?

Question

How to purify water in minimum cost ? ?

Answer 1

first filter it with normal clean cloth or plastic ka small filter then boiled it for 10 minites

Answer 2

If the water contains suspended materials and biological contaminants (microbes and parasites), then filtering the water and boiling it is an effective and cheap means of purifying it.

If however, it contains chemical contamination such as mercury or cyanide (frequent contamination around old mine sites), then there is no easy way of purifying it.

Answer 3

How much water, and how fast?  If you are trying to supply a city, boiling is not a good way.

Depends on what the impurities are, of course, as well.  This is a million dollar question, find a better way and make yourself rich.

Answer 4

You have asked in minimum cost. Therefore this is only a cheap method for purifying. Fill the water in cooldrinks bottle and close its lid.Put it in sun light  for one whole day. Evening you take out the water and filter it and drink it.

Answer 5

Boil the water at high temperature & then using water filter would be the  the best & also cost you the least.

Answer 6

The answer depends on how dirty the water is before you start, and how clean you want it to finish up. Sea-water is costly to purify to a state where it is fit to drink. As far as cost is concerned, there is not much difference between the 4 methods listed below. There are basically 4 economical ways of doing this:

1. Filtration. This method is used with sewage water. It requires large areas of sand over which the water is sprinkled and below which it is captured. It is the most common method in European cities, but it needs a lot of space and work in renewing and cleaning the sand.

2. Boiling, at low pressure, The heat is saved when the water condenses and may partly used to boil some more.

3. Freeze it and then allow the purified ice to melt. Again heat conservation methods can be applied so that the amount of energy needed is a minimum. Some success with this method is reported, when used in Elat, Israel.

4. Reverse osmosis. Basically this means that it is squeezed by pressure through a very fine membrane which does not allow the impurities to pass. By charging the water electrically it is possible to aid in this process. It is sucessful when the water is not very dirty otherwise the membranes become clogged. This method is superior to filtration because a smaller surface for the process is used, but its difficult to preserve and to clean the membrane for repeated use.

5. A fifth method of electrically breaking down and re-constituting the two gasses produced is not practical today, but it might have some hope if the heat of combustion were used to generate most of the necessary electricity.