Technology International Incorporated 0f Virginia
US Navy

Optimal dish washing without graywater

Topic: N94-058: Waterless Dish Washer (Dec 1994- May 1995)

Contract CARDIVNSWC-TR-63-CR-95/03, Carderock Division; Naval Surface Warfare Center; Bethesda, MD

PI: Shane P. Babin; Project Engineer

Project team: Dr. Abdo A. Husseiny; Dr. Zeinab A. Sabri; Dr. J. Fernando Figuaroa, J. Sherman Richardson


Shane P. Babin; Abdo A. Husseiny; Zeinab A. Sabri; J. Fernando Figuaroa, J. Sherman Richardson (May 1995). Optimal Dishwashing without Graywater. Survivability, Structures and Materials Directorate, Research and Development Report; Contrct # CARDIVNSWC-TR-63-CR-95/03, Carderock Division; Naval Surface Warfare Center; Bethesda, MD ; Technology International Incorporated of Virginia


Abdulrahman Foad Abdulfattah and Abdo A. Husseiny (2009). Nomadic Waterless Dishwasher. US Patent Pending; Technology International Incorporated of Virginia.


This Phase I research effort was directed toward the review of technologies which could be applied to shipboard dishwashing to substantially reduce or eliminate the amount of graywater produced during the cleaning of dishware items aboard Navy vessels.  The objectives of this research effort were to examine viable concepts and techniques based on available technologies which could be applied to clean dishes without the generation of graywater or excessive secondary waste streams, to screen the proposed concepts and techniques to identify the most promising technologies, to develop a conceptual design of the optimal process for cleaning dishes, to perform proof-of-concept bench scale tests to determine feasibility of untested components or technologies, and to evaluate the feasibility of the overall concept with a preliminary design of the breadboard model to be constructed in Phase II.

Technologies examined include heated air, steam jets, ultrasonics, blasting, chemical cleaning, physical scrubbing, and the current state-of-the-art water jet cleaning methods.  These technologies were screened based on specific decision criteria using a pairwise comparison method.  These criteria included environmental impact, degree of cleanliness, operational and maintenance considerations, and integration with current facilities.  The study indicated that blasting methods with integrated recycling capabilities would offer the greatest success for cleaning dishware items while considerably reducing the graywater and secondary waste stream production.

Laboratory tests were performed to validate the feasibility of using blasting methods to clean dishes and utensils.  Operational considerations were outlined and preliminary system designs were developed.