FILTRATION

This is a method which is the most especially effective for separating suspensions, for example mud in water. We pour the mixture into a funnel fitted with a piece of filter paper. There are tiny holes in the filter paper for the liquid to pass through, the solid particles are too large to do so, therefore the solid particles will stay on the paper as what we called a solid residue. We called the liquid which pass through the FILTRATE.

There are two ways of folding the filter paper for the filtration:

1. Fold the paper in half along one diameter then in quarters.
   
2. Fold a fluted filter paper. Fold the paper in half, then open out, after that fold in the same director at a right angles to the original. Fold the paper two more times, the folds being all the same direction and mutually at around 45 degrees. Each section will then individually folded in the opposite direction. As result is a 'FLUTED' which sixteen faces will be produced. It provide a faster rate of filtration.

FILTRATION is widely used in industry. Beer is separated from its sediment.

Tap water has also been filtered through filter beds to remove solid impurities.