Laserfiche WebLink
TABLE 7.3.2-'i <br />Solids Processes Design Criteria - Existing and 2025 Capacity Neecls <br />MWMC Facilities Plan, Eugene-Springfield <br /> <br /> Unit Process Existing Criteria/Conditions Year 2025 <br /> <br />Dewatedng 13 hfs/day (Mon-Thur) 12 hm. Jday, 5 days/wk, Mar- <br /> 9 hfs/day (Fd) Sept <br /> Mar~Sept Alt units online 85% of time <br />Trucking 3-4 trucks for 14 days 3~4 trucks for 14 days <br /> 10-12 hfs/day; 6 days/wk; 10-12 hrs/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 Umts 2 3 <br />Size 3 meters 3 meters <br />Sohds Loading Rate, eacWtotal 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/tota~ 800 gpm / t600 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 umts 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 /> <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 gat / 4,332,000 gal <br /> Total 1,140,000 gal / 3,420,000 gat 1,140,000 gal / 4,560,000 <br /> <br /> Detention Time (based on active volume with ali 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 7.32-1_REV4 DOC 2 <br /> <br /> <br />