EVALUATION OF A NEW FILTER FOR MUNICIPAL AND INDUSTRIA WASTEWATER TREATMENT AMERICAN COMBUSTION, INC.

THE MAJOR OBJECTIVE OF THE RESEARCH PROPOSED IS EVALUATION OF THE TECHNICAL FEASIBILITY OF THE NEW DESIGN FEATURES OF THE FILTER AND A COMPARISON OF ITS PERFORMANCE WITH CONVEN- TIONAL FILTERS IN TREATMENT OF WASTEWATERS. THE MAJOR SPECIFIC FEATURE OF THE FILTER IS A STONE-GRANULAR MEDIA BED WHICH IS EXPECTED TO PROVIDE A NON CLOGGING OPERATION, LONGER FILTRATION RUNS AND GREATER DIRT CAPACITY THAN THE EXISTING FILTERS. A PILOT PLANT OF THE NEW FILTER WILL BE OPERATED AT THE CLAYTON WASTEWATER TREATMENT PLANT. THE FILTER WILL BE EVALUATED FOR REMOVAL OF SUSPENDED SOLIDS. 5-DAY BIOCHEM- ICAL OXYGEN DEMAND, TURBIDITY AND CHANGES PARTICLE SIZE DISTRIBUTIONS. THE RUN LENGTH TIME AND BACKWASH EFFICIENCY WILL ALSO BE EVALUATED. THE FILTER WILL BE EVALUATED IN COMPARISON WITH TWO 150-MM DIAMETER COLUMN FILTERS INCOR- PORATING CONVENTIONAL DESIGNS OF WASTEWATER FILTERS WITH MONO MEDIA AND DUAL MEDIA. APPROXIMATELY TWENTY-FIVE FILTERRUNS ARE PLANNED TO BE COMPLETED.