Laboratory and Field Evaluation of a Waterless Food Service Sanitation SystemUsed by Military Mobile Kitchen Trailer Crews

摘要

The feasibility and efficacy of a waterless sanitation system (WSS) for cleaningfood service utensils and removing bacteria were demonstrated in the laboratory and tested in the field under actual conditions during Army training exercises with Mobile Kitchen Trailers (MKT). The WSS employed three wipes used in sequence: (1) a detergent/degreaser wipe; (2) a deionized water wipe to rinse the surface; (3) a Quat disinfectant/sanitizer wipe. Escherichia coli and Staphylococcus aureus cells in biofilms produced on food-soiled, stainless steel surfaces were reduced by 99.999% to 100% at 5 deg C and 260 C by the WSS. The sanitizer dilution used reduced planktonic cells of several food poisoning bacteria by more than six logs. In the field, all surfaces of food-serving utensils and equipment examined were monitored for bacterial contamination by using Difco Hycheck(TM) contact slides. Coliform bacteria were assessed by using Millipore swab test kits. Total bacteria, coliforms and molds on all utensils and equipment cleaned and sanitized by the WSS were reduced far below the U.S. Public Health Service limit for food contact surfaces. Utensils, equipment and greasy fry grills were cleaned very easily and effectively by the WSS. A waterless food service sanitation capability will give the MKT an emergency backup cleaning and sanitation system when either hot water or a potable water supply is unavailable.