Question

Check Your Progress
1. What is the difference between sedimentation and
decantation?
2. Among decantation, filtration and loading, which
method do
you
think is the most cost effective?
3. Besides in loading, do you know any other use of
alum?
4. Why is chlorine added during water purification?​

Answer 1

Q. 1 Answer:- Decantation is pouring out of clear water. Sedimentation is the process of settling as a sediment.

The key difference between sedimentation and decantation is that the sedimentation allows the separation of two substances via settling of one substance whereas the decantation allows the separation of two substances via pouring off one substance.

Q. 2 Answer:- Sorry I don't know .

Q. 3 Answer:- It is aluminum potassium sulfate. This is the type of alum that you find in the grocery store for pickling and in baking powder. It is also used in leather tanning, as a flocculant in water purification, as an ingredient in aftershave and as a treatment to fireproof textiles.

Q. 4 Answer:- Chlorine is added to raw water to eliminate algae and other forms of aquatic life from the water so they won't cause problems in the later stages of water treatment. ... This would control the biological growth, remove iron and manganese, remove taste and odours, control algae growth, and remove the colour from the water.

Answer 2

Answer:

1. sedementation is the process of settling as a sediment.

decantation is pouring out of clear water.