Question

write brief notes on:
winnowing and filtration
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Answer 1

Explanation:

Winnowing:-

is a farming method developed by ancient people for separating grain from chaff. ... In its simplest form it involves throwing the mixture into the air so that the wind blows away the lighter chaff. The heavier grains fall back down for recovery.

Filtration:-

is a process used to separate solids from liquids or gases using a filter medium that allows the fluid to pass through but not the solid. The term "filtration" applies whether the filter is mechanical, biological, or physical. The fluid that passes through the filter is called the filtrate.

hope this will help you

Answer 2

Explanation:

Filteration

Filtration is a process used to separate solids from liquids or gases using a filter medium that allows the fluid to pass through but not the solid. The term "filtration" applies whether the filter is mechanical, biological, or physical. The fluid that passes through the filter is called the filtrate. The filter medium may be a surface filter, which is a solid that traps solid particles, or a depth filter, which is a bed of material that traps the solid.

Filtration is typically an imperfect process. Some fluid remains on the feed side of the filter or embedded in the filter media and some small solid particulates find their way through the filter. As a chemistry and engineering technique, there is always some lost product, whether it's the liquid or solid being collected.

1)

Examples of Filtration

While filtration is an important separation technique in a laboratory, it's also common in everyday life.

1) Brewing coffee involves passing hot water through the ground coffee and a filter. The liquid coffee is the filtrate. Steeping tea is much the same, whether you use a tea bag (paper filter) or tea ball (usually, a metal filter).

2) The kidneys are an example of a biological filter. Blood is filtered by the glomerulus. Essential molecules are reabsorbed back into the blood.

3) Air conditioners and many vacuum cleaners use HEPA filters to remove dust and pollen from the air.

4) Many aquariums use filters containing fibers that capture particulates.

Winnowing

Winnowing is a farming method developed by ancient people for separating grain from chaff. It is also used to remove weevils or other pests from stored grain. Threshing, which is the loosening of grain or seeds from the husks and straw, comes before winnowing.

1) Winnowing is the process of separation of the heavier components from the lighter components of a mixture by wind or by blowing air.

2) It is generally used by farmers to separate the lighter impurities such as husk particles from the heavier grains. ... It is mainly used by farmers.