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THIS METHOD WHICH ALLOWED COMPLETE APPLICATION OF THE TOTAL OXIDATION CONCEPT IN THE TREATMENT OF THE SANITARY WASTES AT HIGHWAY REST AREAS, EMPLOYED A SYNTHETIC FABRIC FILTER TO REPLACE THE CONVENTIONAL FINAL SETTLING TANK SO THAT A POSITIVE MEANS TO PREVENT THE LOSS OF MLSS INTO THE EFFLUENT FROM THE TREATMENT SYSTEM COULD BE ACHIEVED. THE TEST SCALE UNIT WAS CONSTRUCTED OF A STEEL TANK (PAINTED OUTSIDE AND INSIDE WITH COAL TAR) WITH A VOLUME OF 264 GALLONS. INSIDE THE TANK A SYNTHETIC FABRIC FILTER BAG WAS SUPPORTED ON A POLYETHYLENE COATED NO. 10 WIRE MESH. THE FILTER BAG WAS ARRANGED SUCH THAT THE RATIO OF FILTER SURFACE AREA TO AERATION CHAMBER VOLUME WAS 6.8 CU. FT. PER SQUARE FOOT. A VALVE ON THE INLET PIPE (2 IN. DIAMETER) CONTROLLED THE INFLUENT FLOW RATE. THE OUTLET OF THE TANK WAS LOCATED NEAR THE BOTTOM AND A WEIR BOX WAS ATTACHED TO CONTROL THE OUTLET LEVEL. THE SEWAGE COLLECTION, THE AIR SUPPLY, AND OPERATION PROCEDURES ARE DETAILED. RESULTS ARE PRESENTED AND DISCUSSED. IT IS CONCLUDED THAT THE SYSTEM WHICH COULD BE USED EFFICIENTLY FOR INTERSTATE HIGHWAY REST AREAS COULD PRODUCE A HIGH QUALITY EFFLUENT WITH AN AVERAGE BOD AND SS REMOVAL EFFICIENCY OF 97 AND 99 PER CENT RESPECTIVELY. THERE WAS NO DETERIORATION OR CLOGGIING OF THE FILTER DURING THE 6.5 MONTH RESEARCH PERIOD. THE CLEAR, ODOR-FREE EFFLUENT COULD BE REUSED FOR TOILET FLUSHING. AFTER A LONG PERIOD, SLUDGE WASTING MAY BE NECESSARY DUE TO THE CONTINUOUS ACCUMULATION OF INERT AND NON BIODEGRADABLE VOLATILE MATERIALS. THE USE OF THE SYSTEM FOR WASTEWATER TREATMENT WOULD BE MORE ECONOMICAL THAN THE EXISTING TYPE TREATMENT FACILITIES. MORE STABILIZED AND REDUCED SLUDGE AMOUNTS ARE REALIZED. THE SYSTEM CAN TOLERATE ORGANIC OR HYDRAULIC SHOCK LOADS.

Treatment of Sanitary Wastes at Interstate Highway Rest Areas, Phase I