MUNICIPAL AND INDUSTRIAL WASTEWATER IN AN EGG-SHAPED REACTOR

OPERATING STRATEGIES HAVE BEEN DEVELOPED FOR BIOLOGICAL SEQUENCING BATCH REACTOR (SBR) TREATMENT OF BOTH MUNICIPAL WWASTE (I.E. LOW-STRENGTH WASTES) AND INDUSTRIAL WASTES (I.E.HIGH-STRENGTH WASTES CONTAINING DIFFICULT TO DEGRADE ORGANICS). SBR SYSTEMS SHOULD ALSO OFFER ADVANTAGES FOR BIOLOGICAL TREATMENT OF MIXED MUNCIPAL AND INDUSTRIAL WASTEWATERS THAT ARE RELATIVELY LOW STRENGTH, BUT CONTAIN INORGANICS AND HARD TO DEGRADE HAZARDOUS ORGANICS. ENGINEERING A REACTOR TO ACCOMPLISH BIOLOGICAL TREATMENT OF SUCH WASTEWATERS IS IMPORTANT AND IS THE FOCUS OF THE PROPOSED STUDIES. LOW-STRENGTH WASTWATER TREATMENT TYPICALLYREQUIRES MAINTAINING SMALL QUANTITIES OF SLUDGE IN THE R REACTOR TO FACILITATE REMOVAL OF TREATED EFFLUENT, AND TO HOLD DYDRAULIC RETENTION TIMES LOW (I.E. SMALL REACTOR SIZE)HOWEVER, WHEN BIOLOGICAL TREATMENT OF HARD-TO-DEGRADE AND T TOXIC ORGANICS IS ATTEMPTED, QUANTITIES OF SLUDGE HELD IN THE REACTOR MUST BE LARGE TO ASSURE MAINTAINING SUFFICIENT NNUMBERS OF ORGANISMS ACCLIMATED TO BIOLOGICAL DEGRADATION OFTHOSE ORGANICS. THE EFF-SHAPED REACTOR WHICH HAS BEEN WIDELYUSED IN GERMANY AND RECENTLY INTRODUCED IN THE UNITED STATESFOR ANAEROBIC SLUDGE DIGESTION APPEARS TO BE A REACTOR CONFIGURATION WELL SUITED FOR BIOLOGICAL SBR TREATMENT OF T THESE MIXED WASTEWATERS. THE PROPOSED STUDIES ARE DIRECTED AT THE PROCESS DEVELOPMENT AND ENGINEERING DESIGN OF AN EGG-SHAPED SBR SYSTEM FOR TREATMENT OF MIXED MUNICIPAL AND IND USTRIAL WASTEWATERS.