Regeneration of true exhausted zeolite bed, Chemistry

Q. How is true exhausted Zeolite bed regenerated? Give the merits and demerits of Zeolite process.

                                                                   OR

State the Zeolite process for the removal of hardness of water. Discuss its merits over Lime-soda process.

                                                                OR

Explain the Zeolite method of water softening in detail.

Ans.

Regeneration of true exhausted Zeolite bed: When the softening process is continued for longer time, the Zeolite is completely converted in calcium and magnesium Zeolite (CaZ and MgZ) and it stops to further soften water, it gets exhausted. At this stage the supply of hard water is stopped and exhausted Zeolite is regarded by treating it with 10% NaCl solution. This whole process involved alternate cycle of softening and regeneration.

Merits of Zeolite process

1.      Hardness of water is almost completely removed.

2.      Equivalent used occupies small space.

3.      There is no damage of formation of sludge in treated water.

4.      Process automatically adjusted itself for variation in hardness of incoming water.

Demerits:

1.      The process only replaces Ca+2 and Mg+2 by sodium ion, but leaves all other ions as such as treated water.

2.      Turbid water, mineral acid water and coloured water containing Mn+2 and Fe+2 cannot be treated efficiently.

3.      Treated water contains more sodium salts.

Posted Date: 7/21/2012 9:17:20 AM | Location : United States







Related Discussions:- Regeneration of true exhausted zeolite bed, Assignment Help, Ask Question on Regeneration of true exhausted zeolite bed, Get Answer, Expert's Help, Regeneration of true exhausted zeolite bed Discussions

Write discussion on Regeneration of true exhausted zeolite bed
Your posts are moderated
Related Questions

what is the reaction of heavy water

applications of photochemistry

The most important classification of elements is that of non-metallic versus metallic. Metallic elements form solids that are good conductors of electricity, and where bonding is n

comprision between velocity constant constant

what are the methods of expressing the mathematical concentration of solutions.?

Condensation reaction of carbonyl compounds Nucleophilic addition reaction of compounds comprising carbonyl group along with those compounds that have at least one acidic hydro

why HNO3 is not used for detection of acidic radical of 1st and 2nd group ions?

The mass of a photon with a wavelength equal to  1.54 x 10 -8 cm  is: (1) 0.8268 x 10 -34 kg                      (2) 1.287 x10 -33 kg         (3)1.4285x 10 -32 k

Question: a) If you were a newly appointed environmental engineer in a wastewater treatment plant and one of your tasks was to characterise the wastewater. According to you,