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7 RECO~,~ENDED PLAN <br /> <br />TABLE 7.5-1 <br />Summary of Recommended Improvements through Year 2025 <br />MWMC Facilities Plan, Eugene-Springfield <br /> <br /> Unit Process Improvements <br />Influent Pump Station ,, Install one additional screw pump. <br />Screening ,* Install four new fine screens. <br /> · Install two new screenings washer/compactors. <br /> ,, Install four new Parshall flumes for flow measurement. <br />Grit Removal · Install four new vortex grit separators. <br /> ,, Install four new grit pumps and cyclones. <br /> e Install two new gnt classifiers. <br /> ,, Install two new screenings/gdt hoppers. <br /> <br />Parallel Primary and · Construct new Preliminary Treatment Diversion Pump Station with four <br />Secondary Treatment new preliminary treatment diversion pumps. <br /> <br /> o Construct new Primary Treatment Divermon Pump Station with four new <br /> primary treatment diversion pumps. <br /> <br /> ,, Install piping to enable primary and secondary treatment to be operated in <br /> parallel. <br /> <br />Primary Clarifiers · Install a new feed well. <br /> ,, Install new EDIs for increased energy dissipation from feed well. <br /> ,, Install new density current baffles at outboard launders. <br /> <br /> ,, Operate primary clanfiers without a sludge blanket by pumping a thin <br /> pdmary sludge at a high flow rate from the primary clariflers to an external <br /> thickener. <br /> <br /> o Install two new 50-foot gravity thickeners. <br /> · Construct new thickened primary sludge pump station, <br />Gravity Belt Thickenem · Install one new gravity belt thickener. <br />Aeration Basins · Install new step feed equipment and piping. <br /> , Install new anoxic selectors. <br /> ,, Install new fine bubble d~ffusers. <br /> · Remove effluent gates. <br /> · Install new primary effluent flew control gates. <br /> <br /> MWMC_7 0_REV4.DOC 7-~ 1 <br /> <br /> <br />