Development of a Membrane System for the Shipboard Processing of Gray Water/Oily Water
Award last edited on: 9/13/2002

Sponsored Program
Awarding Agency
DOD : Navy
Total Award Amount
Award Phase
Solicitation Topic Code
Principal Investigator
Clyde E Milstead

Company Information

Separation Systems Technology Inc

4901 Morena Boulevard Suite 809
San Diego, CA 92117
   (858) 581-3765
Location: Single
Congr. District: 52
County: San Diego

Phase I

Contract Number: N00024-95-C-4036
Start Date: 12/31/1994    Completed: 6/29/1995
Phase I year
Phase I Amount
For nearly 20 years the Navy has been facing the problem of limitations of graywater and oily waste discharge into the ocean and/or harbors. One obvious method would be a lightweight unit composed of a membrane system capable of successfully processing these complex waters. Membrane systems composed of spiral elements, hollow-fine fibers and ceramic filters that have been tested over this period have all suffered severe flux declines operating on these waters. This Phase I proposal is directed toward demonstrating the feasibility of utilizing a low-fouling hydrophilic, ultrafiltration or nanofiltration membrane, incorporated in a high velocity spinning device designed to minimize fouling and promote ease of cleaning, for the processing of graywater and oily waste water feeds aboard ship. This rotating membrane system utilizes the process of centrifugal action and shear forces to prevent membrane fouling common to spiral-wound elements. The open channels in the unit eliminates the need for mesh-type turbulence-promoting spacers that can plug with solids and lower the system performance. This leads us to conclude that fouling should not be a high-flux membrane developed during this program offers excellent promise of success.

Phase II

Contract Number: ----------
Start Date: 00/00/00    Completed: 00/00/00
Phase II year
Phase II Amount