Pretreatment of Waste Discharges from Improved Army Tactical Equipment Maintenance Facilities.

Abstract : This report describes (1) field investigations into the use of commercial cleaning equipment for Army tactical equipment maintenance operations and (2) an evaluation of wastewater pretreatment for sanitary sewer discharge. Included is an analysis of raw wastewater characteristics, an evaluation of commercial cleaning equipment performance, and the development of design criteria for wastewater pretreatment. Also described is the field verification of these criteria at a pilot test facility that used a commercially packed, gravity oil/water separator. It was determined that operationally reliable commercial cleaning equipment is available to the Army that can perform all required maintenance cleaning tasks without cleaning aids. It was also determined that wastewater pretreatment requirements could be stated in terms of total suspended solids and free oil removal to predetermined levels, if low hydraulic overflow rates and relatively long detection times are used.