Transcription of Maximizing Polymer Value for Improved Sludge Dewatering
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Maximizing Polymer Value for Improved Sludge Dewatering
Maximizing Polymer Value for Improved Sludge Dewatering Yong Kim, Technical Director UGSI Chemical Feed, Inc. 1 Presentation Overview 2 Characteristics of Polymer Effect of Dilution Water Chemistry Effect of Mixing Energy/Strategy Two-stage Primary Mixing Primary Mixing then Post-Dilution Case Study at Fairfield WWTP Coagulation and Flocculation Coagulation - Double-layer compression (charge neutralization) - Enmeshment (sweep coagulation) Clay suspension + Ferric chloride (40 120 mg/L) 3 Flocculation - Polymer Bridging Clay suspension + Ferric chloride + Polymer (< mg/L) Extended cationic Polymer molecule attracts negatively-charged suspended particles. + + + + + + + + - - - - - - - Flocculation - Bridging by Polymer Molecules suspended particles 4 How to prevent long-chain Polymer molecules from being damaged? Polymer Structure Polymeric Flocculant, Linear Polymer , Polyelectrolyte Chained Structure by Repetition of Monomers.
Maximizing Polymer Value for Improved Sludge Dewatering Yong Kim, Ph.D. Technical Director UGSI Chemical Feed, Inc. 1 . ... PolyBlend® DP Series Tank Mixing ... UGSI PolyBlend Dry Polymer System • Initial wetting: high-energy mechanical mixing • Mixing: two (2) 360 gal mix tanks with hollow- ...
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