What is removed from water by lime soda process?

Lime soda process: In lime-soda process, hard water is treated with lime (CaO or Ca (OH)2) firstly, after that with soda. In this process, the hardness is removed by sedimentation as calcium carbonate or magnesium hydroxide.

What is lime soda treatment process?

Lime softening (also known as lime buttering, lime-soda treatment, or Clark’s process) is a type of water treatment used for water softening, which uses the addition of limewater (calcium hydroxide) to remove hardness (deposits of calcium and magnesium salts) by precipitation.

Why lime soda process is used?

Soda lime is a process used in water treatment to remove Hardness from water. Addition of lime (CaO) and soda (Na2CO3) to the hard water precipitates calcium as the carbonate, and magnesium as its hydroxide. …

Why is hot lime soda process better than cold process?

Hot lime soda requires hardly 15 mins. Hence it is more economical while cold process requires several hours. Dissolved gases like O2,CO2 are removed. Due to high temperature, bacterial contents are minimum.

What is the function of lime and soda in lime soda process?

Chemical precipitation is one of the more common methods used to soften water. Chemicals normally used are lime (calcium hydroxide, Ca(OH)2) and soda ash (sodium carbonate, Na2CO3). Lime is used to remove chemicals that cause carbonate hardness. Soda ash is used to remove chemicals that cause non-carbonate hardness.

What are the advantages and disadvantages of lime soda process?

It is slow process because reactions during water softening takes place in very dilute solutions and room temp. It does not give soft water having residual hardness less than 50-60 ppm. It requires coagulant for setting particles of ppt.

How do you remove carbonate from water?

Chemical precipitation is one of the more common methods used to soften water. Chemicals normally used are lime (calcium hydroxide, Ca(OH)2) and soda ash (sodium carbonate, Na2CO3). Lime is used to remove chemicals that cause carbonate hardness.

How can CaCO3 be reduced in water?

softening through carbonate removal. When the water has a high TH accompanied by a significant M-alk., the water can be softened by using lime to remove the carbonate.

What are the advantages and disadvantages of lime-soda process?

What are the advantages and disadvantages of lime soda?

What is lime and soda differentiate hot and cold lime soda process?

1- Hot lime soda process is carried out at high temperature (95-100°C) ,whereas cold lime soda process is carried out at room temperature (25-30°C). 2- Hot lime soda is a rapid process, but cold lime soda is slow process. 3-No coagulant is required here, in cold lime soda process coagulant is necessary.