ECONOMIC EVALUATION OF CALCIUM MAGNESIUM ACETATE (CMA) PRODUCTION FOR ROAD DEICING. FINAL REPORT

About 28 billion lbs of liquid whey produced from the cheese manufacturing in the United States are being wasted every year. The objective of this project was to determine the feasibility and economics of using the wasted whey as a feedstock to produce calcium magnesium acetate (CMA) for highway deicing. CMA is a biodegradable, low-corrosion deicer that can be used to replace salt for roadway deicing, thus minimizing salt damages to highways and environments. An anaerobic fermentation process using immobilized cells of Streptococcus lactis and C. formicoaceticum was investigated for acetate production from whey lactose. The overall acetate yield from lactose in this co-cultured fermentation was about 95% (wt/wt), and the final acetate concentration obtained was about 4.0% (wt/v). The corresponding reactor productivity was 0.9 g acetate/hr-L reactor volume. The acetic acid produced by fermentation can be readily recovered by solvent extraction with an aliphatic amine, and then back-extracted and reacted with dolomitic lime to form a concentrated (25%) CMA solution. This CMA solution can be dried and granulized to the final CMA product. CMA produced from this process would cost from $180/ton to $283/ton, depending on the process scale. The selling price for CMA thus can be reduced to $300/ton or lower from the current market price of $650/ton to allow economical use of CMA deicer in environmentally sensitive areas and new bridges.

  • Corporate Authors:

    Ohio State University, Columbus

    Department of Chemical Engineering, 410 West 19th Avenue
    Columbus, OH  United States  43210

    Ohio Department of Transportation

    25 South Front Street
    Columbus, OH  United States  43215

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Yang, S-T
    • Zhu, H
    • Li, Yixuan
  • Publication Date: 1992-9-30

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 78 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00666172
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/OH-94/003
  • Contract Numbers: State Job No. 14489(0)
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Sep 1 1994 12:00AM