How to Separate the Substances?

 Following are the main method of separate the substances.

1. Hand Picking

If you have to eat banana, some time, its some is not good, you pick with hand throw it in dustbin. This is hand picking method of separating the impurities. Before making rice or daily or pulse, I check it and remove dust, small creatures and stone from it by my hand picking. 

2. Threshing

Threshing is method in which we throw the bundle of wheat grain branches on the earth and loosening the edible part of wheat. Sometime small wood, we thresh the grain. With this, also stalks can be separate from its useful grain. Before beating with wood stick, we have to dry whole grain branches bundle in the sun. The process becomes so easy with this. 

3. Winnowing

Winnowing is the method of separate the small chaff from grain. Winnowing word comes from use of wind for separate the chaff or small leaves from grain. For winnowing we throw mixture of chaff and grain. Chaff is light and it can easily separate from main grain. See pics

4. Sieving

If you need to remove the impurities of bran, we buy a sieve and pour the flour into it. We will find the impurities in the bran and remove it and again mix the bran the flour. We can use sieve. You can use it flate shape or slanting shape. 

5. Sedimentation, Decantation and Filtration

Sedimentation is the way to purify the water. If you see the yellow color in your handpump water, it means some small particles of iron in the water. Now, keep same water on mud pot for 24 hrs. You will see water has some transparent color and same small iron depreciated powder sit below of mud pot. 

Now, take this water and keep it in other pot and again other steel pot for 1 day and it will be called decantation. Now, you will get full result. This water purify because the gravity power of earth which pulls all impurities in the bottom of water jug. 

6. Condensation

Condensation is the process of converting gas into liquid form 

When we need arak which is useful for removing some diseases, we have to boil the water and it start evaporate and then we convert again this water gas into liquid by ice glass

6. Evaporation

Evaporation is great method to separate material which are soluble in the water like salt. When we boil the water which has the mixed salt. Water converts into gas from liquid when we boil this water and rest is salt. 

7. Using more than one method

We may use handpicking, threshing and winnowing and sieving together for removing the impurities from grain.