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Lime stone filter treatment

I am working in desalination plant and after we got a distillate water ( no salt content ) we treat this water with CO2 and lime stone to get hardness and Alkalinity in water at about 50 ppm both , but after 5 years approx. we could get this figure although we have a full of lime in all filter and sufficient amount dosing of CO2 26 ppm and still we could not get 45 ppm of hardness and Total Alkalinity and we I check sample on each filter ( one filter are full of lime and other are less than have ) we got same result , so my question is why I can not get 50 ppm T. Alkalinity and we same result is obtain in different quantity of lime in two filters. Thanks to everybody

Aboud Bamaga
- Jeddah, KSA
2007

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August 4, 2008

Have you checked the lime stone quality? may be the present line stone is of different quality than the previous one.
this will be the reason, otherwise I am not getting any reason.

also I supply one lime stone filter package to dubai, will you tell me how you are using your filling system in the lime is it automatic or manual

ahsan khan
- India

Brother can you provide the detail of lime stone filter supplier as we want want to installed in our one of the project- RO-potable water.We want to installed after first pass permeate water.

Najmuddin Malek
- Jeddah-Saudi Arabia
July 14, 2009