Tutorial-4

TUTE- SHEET-4
WATER TREATMENT-2


1. What are Zeolites and what for they used?
2. How are exhausted resins regenerated in an exchange process? Write the chemical reactions involved.
3. What are the advantages of using chloramines as a disinfectant?
4. What is break-point chlorination?
5. What do you understand by softening of water? Describe the lime soda process and elaborate the functions of lime and soda in the process.
6. Describe hot lime- soda process used for the softening of water. In what respect is this process superior to the cold lime-soda process? What are the limitations of the process?
7. Describe the zeolite process used for softening of water. What are the advantages and limitations of the process?
8. Describe the demineralization process for softening of water. What are its advantages and limitations?
9. What are the essential qualities of drinking water? Describe the various process used for domestic water treatment.
10. Explain the following term.

a) Chlorination, b) Super chlorination, c) De chlorination, d) Break-point chlorination

11. Calculate the amount of lime and soda required for softening of 15000 liter of water, which analysed as follow : Temporary hardness =20 ppm, Permanent hardness = 15 ppm, permanent Mg hardness = 10 ppm.