5. Comparison of Disinfectant Oxidation Potentials (EOP) of Various Oxidants ClO 2 reacts by oxidation, but is not a strong oxidizer Why does ClO 2 work so well at low doses?
21. PureLine ® HP-Series Generators Electrochemical ClO 2 Production: Anode: ClO 2 - ClO 2 + e - + Na + Cathode: H 2 O + e - 1/2 H 2 + OH - Na + + OH - NaOH
22. PureLine ™ HP-Series Electro-chemical ClO 2 Generator Electrochemical Production of Chlorine Dioxide: Anode: ClO 2 - ----> ClO 2 + e - Cathode: H 2 O + e - ---> 1/2 H 2 + OH - (0.1%H 2 ) Na + + OH - ---> NaOH
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25. Electrochemical CIO 2 Operational Costs Electrical Consumption Per Pound of ClO 2 55 watts per lb. Chlorine Dioxide $0.085/KWH = $7.14 per day electrical usage PureCide 25 TM solution Consumption 6.6 lbs Per Pound of ClO 2
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35. Typical ClO 2 Feed Point SOURCE WATER SILT & MUD TANK PRIMARY SETTLING BASIN SECONDARY SETTLING BASIN FLOCCULATION BASIN (SLOW MIXER) COAGULATION BASIN (FLASH MIXER ) CLEAR WELL COAL & SAND FILTER BAR SCREENS CHLORINE DIOXIDE LOW LIFT PUMPS SLUDGE DISPOSAL TO CANAL SLUDGE RETURNED TO CANAL CHLORINE HIGH LIFT PUMPS TO DISTRIBUTION SYSTEM LIME IRON CARBON POLY-ELECTROLYTES
44. Conclusions Pre-disinfection with pure ClO 2 provided a very cost-effective means for dramatically reducing DBP levels while improving the microbial control, turbidity, taste and odor with a reduction in chemical use resulting in a 3.5 – 4 year ROI.