Rapid granular media filters are widely used in drinking water treatment to remove particulate and microbial contaminants prior to disinfection. In order to function properly, these filters must be backwashed regularly to remove accumulated deposits. Experience has shown that whenever filter influent is pretreated with coagulants (sometimes also referred to as flocculants), especially polymers, upflow water wash alone is insufficient to prevent mudballing. Click Here For Complete Article Text
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