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TABLE 7.3.2-1 <br />Solids Processes Design Criteria - Existing and 2025 Capacity Needs <br />MWMC Facilities Plan, Eugene-Springfield <br /> <br /> Unit Process Existing Criteria/Conditions Year 2025 <br />Number of Units I 1 <br />Capacity 2000 gpm 2000 gpm <br />Supernatant Pump <br />Number of Units 1 1 <br />Capacity 800 gpm 800 gpm <br />LIQUID SLUDGE STORAGE <br />Digested Sludge Storage Tanks <br />Number of Units 2 2 <br />Type Floating Cover Floating Cover <br />Volume, each/total 360,000 gal / 720,000 gal 360,000 gal / 720,000 gal <br />Diameter 60 ff 60 ft <br />Sidewater Depth 14 to 17 ft 14 to 17 ft <br />Belt Filter Press Feed Tanks <br />Number of Units 2 2 <br />Volume, each 370,000 gal / 740,000 gal 370,000 gal / 740,000 gal <br />Diameter 48 ft 48 ft <br />Sidewater Depth 26 to 27 ft 26 to 27 ft <br />Belt Filter Press Feed Mixing Pumps <br />Number of Units 2 2 <br />Type Screw Centrifugal Screw Centrifugal <br />Capacity, each t 800 gpm 1800 gpm <br />Horsepower, each 25 25 <br />SLUDGE DEWATERING <br />Belt Filter Presses (BFPs) <br />Number of Units 3 3 <br />Size 2 meter 2 meter <br />Solids Loading Rate, each/total 2440 lbs/hr / 7320 lbs/hr 2440 lbs/hr / 7320 lbs/hr <br />Hydraulic Loading Rate, each/total 140 gpm / 420 gpm 140 gpm / 420 gpm <br />Average Solids Feed Concentration 3% 3% <br />Capture Rate 98% 95% <br />Dewatered Cake Solids 16.5% dry solids 17% dry solids <br />Belt Filter Press Auxiliary Equipment <br />Polymer Feed System <br />Polymer Dose 15 lbs/dry ton 15 lbs/dry ton <br />Polymer Consumption, average 310 lbs/day <br />Capacity, average 55 dry lbs/hr <br />Capacity, maximum 104 dry lbs/hr <br />Raw material form Dry Supersack <br />Solution Strength - Target 0.50% 0.50% <br />Polymer Mixing Tanks <br />Number of units 2 2 <br />Volume, each/total 3700 gal / 7400 gal 3700 gal / 7400 gal <br /> <br />MWMC_'I'ABLE 7.3.2-1_REV4.DOC 4 <br /> <br /> <br />