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.. ..r <br /> ATTACHMENT C PAGE 3 OF 7 <br /> H) THE FILTER PRESS IS A HYDRAULIC RAM PLATE-TYPE <br /> PRESS AND HAS A NOMINAL CAPACITY OF 2 CUBIC FEET. <br /> THE PRESS CONTAINS 11 PLATES WITH REMOVABLE FILTER <br /> CLOTHS ON EACH FACE OF THE PLATE. DURING <br /> FILTRATION, SLUDGE IS TRAPPED BETWEEN THE CLOTH- <br /> COVERED PLATES AND THE EXCESS WATER SQUEEZED OUT <br /> BY THE HYDRAULIC RAM. THE PRESS HAS A STEEL BIN <br /> UNDERNEATH IT TO CATCH THE SLUDGE WHEN THE PLATES <br /> ARE OPENED. <br /> I ) THE TRANSFER TANK IS A 100 GALLON POLYPROPYLENE <br /> TANK ABOUT 5 YEARS OLD. IT SERVES AS A FEED TANK <br /> TO THE TWO ACCUMULATION TANKS. <br /> J ) THE TWO ACCUMULATION TANKS ARE NEW POLYPROPYLENE <br /> TANKS WITH A NOMINAL CAPACITY OF 2500 GALLONS <br /> EACH. THESE TANKS ARE EQUIPPED WITH APPROPRIATE <br /> FILTERS AND PUMPS FOR RECEIVING TREATED WASTEWATER <br /> FROM THE CLARIFIERS. PLUMBING ARRANGEMENTS ENABLE <br /> THE CONTENTS OF ONE TANK TO BE RE-CIRCULATED AND <br /> MIXED FOR SAMPLING WHILE THE OTHER IS FILLING. <br /> K ) THE FINAL RECEIVING TANK IS A 250 GALLON SQUARE <br /> POLYPROPYLENE TANK ABOUT 5 YEARS OLD. IT IS <br /> EQUIPPED WITH A PH MONITOR FOR FINAL MONITORING, <br /> PH ADJUSTMENT, AND ALARM. IT IS ALSO EQUIPPED <br /> WITH BOTH ACID AND CAUSTIC DELIVERY LINES FOR PH <br /> ADJUSTMENT. <br /> PROCESS: <br /> A) WASTEWATER FROM THE PROCESS IS COLLECTED IN THE <br /> WRT. IN ADDITION, THE WRT ALSO RECEIVES METAL- <br /> BEARING FILTRATE FROM THE FILTER PRESS IN THIS <br /> SYSTEM AND CLARIFIED WASTE FOR REWORK. <br /> SODIUM HYDROXIDE (CAUSTIC SODA) IS ADDED TO RAISE <br /> THE PH TO ABOUT 9. A SPECIAL METAL COMPLEXANT / <br /> PRECIPITANT IS ALSO ADDED TO THIS TANK. SMALL <br /> AMOUNTS OF SODIUM SULFIDE ARE ALSO ADDED TO AID IN <br /> METAL REMOVAL FROM SOLUTION. <br />