December 2006

Environment

Protect anion resin from biofouling

Good treatment practices can prevent this serious problem

Rahman, S., Karnaphuli Fertilizer Co. Ltd.

Ion exchange resin in water (H2O) treatment plants can experience resin fouling due to different contaminants present in source H2O. Microbial nutrients that are available in resin beds, under favorable temperatures and idle conditions, may allow microorganisms to grow. This can be eliminated with appropriate treatment and/or prevention. Biological fouling is less severe in cation resin than in anion. However, both resin types present the same operational difficulties with regard to biofouling. As the bed's pressure drop increases, drastic flow reduction occurs, making backwash operations difficult due to out-flowing debris. Bacteria proliferation to other ion exchangers can also happen. D

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