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Item A-MWMC Facilities Plan
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Item A-MWMC Facilities Plan
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6/9/2010 1:11:10 PM
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5/12/2004 3:16:01 PM
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Agenda Item Summary
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5/19/2004
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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 /> <br />Dewatering 13 hrs/day (Mon-Thur) 12 hrs/day, 5 days/wk, Mar- <br /> 9 hfs/day (Fri) Sept <br /> Mar-Sept All units online 85% of time <br />Trucking 3-4 trucks for 14 days 3-4 trucks for 14 days <br /> 10-12 h rs/day; 6 days/wk; 10-12 hr s/day; 6 days/wk; <br /> 6-7 trips/day/truck 6-7 trips/day/truck <br />WAS THICKENING <br />Gravity Belt Thickeners (GBTs) <br />Number of Units 2 3 <br />Size 3 meters 3 meters <br />Solids Loading Rate, each/total 2010 lbs/hour / 4020 lbs/hour 2010 lbs/hour / 6030 lbs/hour <br />Hydraulic Loading Rate, each/total 720 gpm / 1440 gpm 720 gpm / 2160 gpm <br />Thickened WAS Concentration 4% dry solids 4% dry solids <br />Capture Efficiency 95% 95% <br />WAS Pumps <br />Number of units 2 3 <br />Capacity, each/total 800 gpm / 1600 gpm 800 gpm / 2400 gpm <br />Type Screw Centrifugal Screw Centrifugal <br />Drive AFD AFD <br />Horsepower, each 15 15 <br />TWAS Pumps <br />Number of units 2 3 <br />Capacity, each/total 120 gpm / 240 gpm 120 gpm / 360 gpm <br />Type Progressing Cavity Progressing Cavity <br />Drive AFD AFD <br />Horsepower, each 20 20 <br />SLUDGE STABILIZATION <br />Anaerobic Digesters <br />Number of Units 3 4 <br />Diameter, each 85 ft 85 ft <br />Sidewall Depth 27.6 ft 27.6 <br />Type Fixed Cover Fixed Cover <br />Volume, each <br /> Active Digestion 969,000 gal / 2,907,000 gal 1,083,000 gal / 4,332,000 gal <br /> Total 1,140,000 gal / 3,420,000 gal 1,140,000 gal / 4,560,000 gal <br />Detention Time (based on active volume with all units in service) <br /> Annual Average 20 to 22 days 20.2 days <br /> Maximum Monthly Average 22 days 15.3 days <br /> <br />Detention Time (based on active volume with one units out of service) <br /> Annual Average 16.5 days 15.2 days <br /> Maximum Monthly Average 15 days 11.5 days <br /> <br />Volatile Solids Loading (based on active volume with all units in service) <br /> Primary Sludge 83 percent volatile 83 percent volatile <br /> <br />MWMC_TABLE 7.3.2-1 _REV4.DOC 2 <br /> <br /> <br />
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