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-----CO-CURRENT AND COUNTER-CURRENT REGENERATION COMPARISON
WE OPERATE THE DEMIN PLANT OF 300 m3/hr. OUR ANION EFFLUENT QUALITY IS, SILICA LESS THAN 10 ppb AND CONDUCTIVITY 3-4 microsiemens. CURRENTLY WE ARE REGENERATING THE ANION IN CO-CURRENT WAY. WE WANT TO SWITCH OVER TO COUNTER-CURRENT REGENERATION. WILL IT FURTHER IMPROVE THE WATER QUALITY? PLEASE EXPLAIN, HOW MUCH EFFICIENT IS THE COUNTER-CURRENT REGENERATION PROCESS COMPARED WITH THE CO-CURRENT (PLEASE GIVE THE COMPARISON IN REGENERANT SAVING AND SERVICE RUN).
QAISER MAHMOODFERTILIZER COMPANY - SADIQ ABAD, Punjab, PAKISTAN
2003
The advantages of counter current regeneration are unquestionable. You may expect extension of capacity up to 10%, reduction of use of chemicals up to 40 % and increase of product quality up to 80%. Also use of water for regeneration is lower and thus amount of waste is lower as well.
Jerry
- Guelph, Canada
2003
2003
The benefits can be substantial. In addition to less water usage, you should also be able to reduce chemical usage. We typically use only 4-5 lbs of sodium hydroxide per cubic foot of strong base anion resin for countercurrent operation and achieve very low silica leakage.
For best results, a deep resin bed (>30" of resin)is used, and DI water is used for diluting the sodium hydroxide and for rinsing, with a final downflow recycled rinse of decationized water. Similar benefits are obtained by operating the cation exchanger in a countercurrent mode. Your ion exchange resin supplier should be able to give you more information on the savings and the quality improvements that you can expect to achieve.
Lyle Kirmanconsultant - Cleveland Heights, Ohio
I want to know is counter current regeneration possible in WBA?
Rohan Sarin- Lucknow, U.P., India
March 24, 2009
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