How water is softening by lime soda 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.
What are advantages of lime soda process of softening?
Advantages of Lime-Soda Process : it is very economical. if this process is combined with sedimentation with coagulation, lesser amounts of coagulants shall be needed. The process increases the pH value of the treated-water; thereby corrosion of the distribution pipes is reduced.
What is the procedure for the purification of water in lime soda process?
The lime-soda method of water softening must be followed by sedimentation and filtration in order to remove the precipitates. Ion exchange is accomplished by passing the water through columns of a natural or synthetic resin that trades sodium ions for calcium and magnesium ions.
What is soda lime method?
Soda lime is a process used in water treatment to remove Hardness from water. This process is now obsolete but was very useful for the treatment of large volumes of hard water. Addition of lime (CaO) and soda (Na2CO3) to the hard water precipitates calcium as the carbonate, and magnesium as its hydroxide.
What is the function of coagulant in lime soda process?
Alum, aluminium sulphate and sodium aluminate are used as coagulants in lime-soda process. 5. What is the function of coagulant? Explanation: Coagulants helps in the formation of coarse precipitate.
How does lime soda remove permanent hardness?
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 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.
What are lime and soda compare hot and cold lime soda process for softening of hard water?
1-Hot lime soft drink process is done at high temperature (95-100°C) ,while cold lime soft drink process is done at room temperature (25-30°C). 4-In hot lime soft drink process filtration is simple as consistency of water is low, yet in virus process filtration isn’t simple.
What is soda lime made of?
soda lime, white or grayish white granular mixture of calcium hydroxide with sodium hydroxide or potassium hydroxide. Soda lime absorbs carbon dioxide and water vapour and deteriorates rapidly unless kept in airtight containers.
What will be your preference to remove hardness by lime soda process batch process or continuous process justify your answer?
Explanation: Batch process is only used for removing the hardness of the small scale. The Continuous soda lime process is used for the industrial purposes. Explanation: The amount of coagulate if added in the hot lime soda process is very low.