Ships' laundry wastewater treatment system development is motivated by the desire to save energy and to minimize water pollution. Solving system development problems is complicated by the different laundry practices, laundry agent compositions, and machinery configurations encountered in fleet ships. A number of approaches for treating laundry wastewater "as received" were evaluated. An on-line, relatively lightweight, low maintenance, treatment system that produces high quality recycle water with a low consumption of chemicals is described. In the fully automated system, two additives are metered into the wastewater. A coarse precipitate is formed which entraps suspended matter and which is easily removed by froth flotation. Laundry water is being treated and reused 50 times with 87 percent saving in freshwater requirement, in an experimental system at the U.S. Naval Academy laundry. Principles of system operation, the mechanism of surfactant, flocculant, and proprietary additive interaction are discussed and a technique for disposal of floc containing the water contaminants is reviewed. Energy savings, and absence of significant effects of the recycled water on cleanliness and tear strength of the washed garments, are shown.

  • Supplemental Notes:
    • Presented at American Society of Mechanical Engineers, Aerospace Division: Intersociety Conference on Environmental Systems. San Francisco, California, July 11-14, 1977.
  • Corporate Authors:

    American Society of Mechanical Engineers

    Two Park Avenue
    New York, NY  United States  10016-5990
  • Authors:
    • van Hees, W
    • Lard, E W
    • McMinn, D R
  • Publication Date: 1977

Media Info

  • Features: References;
  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00183187
  • Record Type: Publication
  • Source Agency: Data Courier, Incorporated
  • Report/Paper Numbers: Paper 77-ENAS-40
  • Files: TRIS
  • Created Date: Oct 31 1978 12:00AM