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NON-CHLORIDE WINTER DEICERS PowerPoint Presentation
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NON-CHLORIDE WINTER DEICERS

NON-CHLORIDE WINTER DEICERS

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NON-CHLORIDE WINTER DEICERS

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  1. NON-CHLORIDE WINTER DEICERS

  2. Publicly Available Non-Chloride Deicers • Calcium Magnesium Acetate (CMA) • Working temperature: + 20°F (-7°C) • Rate of liquid application – Anti-icing-15-25 GAL/LM – Deice – 25-60 GAL/LM (.5-1 gallon/1000 Ft²) • Rate dry – 200-400# LANE MILE (10-25#/1000 FT²) • Contains no chlorides. Safest deicer for new concrete. • 97% Anhydrous Sodium Acetate (NAAC) • Working temperature: + 0°F (-18°C) • Pelleted only • Spread – 200#-500# LANE MILE (7-20# per 1000 Ft²) • Contains no chloride. Used in salt sensitive areas – airport runways, bridges, parking garages, doorways, sidewalks, etc. From Cryotech -2010

  3. Publicly Available Non-Chloride Deicers • Potassium Acetate (KA) • Most widely used for airfield deicing – FAA approved • Dry or Aqueous Application • Contains no chlorides. Environmentally acceptable alternative to Urea. • Others • Sodium Formate • Potassium Formate

  4. General Concerns • COST • 5x-10x MORE EXPENSIVE THAN CONVENTIONAL DEICERS • BIOLOGICAL OXYGEN DEMAND • VARYING RESULTS BUT ALL HAVE POTENTIAL FOR SOME IMPACT • TOXICITY • GENERALLY LESS THAN CHLORIDE-BASED DEICERS

  5. CASE STUDY WOODARD & CURRAN OFFICE, PORTLAND, ME Source: Relative Contribution of Each Source to the Total Salt Imports to the Watershed Policy-Porcupine Brook Chloride TMDL April 18, 2008

  6. CASE STUDY • Spot Application Modification • 2 - 55 lbs. Bags Per Storm • 15 Storms – 30 bags per winter (1650 lbs) of CaCL @ $14.65 per bag • Replace with CMA at $48 per bag • Reduces overall annual chloride application by 15% withincrease of cost of $1100

  7. CAN WE MAKE IT CHEAPER?