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7, RECOMMENDED 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 /> · Install two new grit classifiers. <br /> · Install two new screenings/grit 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 /> · Construct new Primary Treatment Diversion 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 clarifiers without a sludge blanket by pumping a thin <br /> primary sludge at a high flow rate from the primary clarifiers to an external <br /> thickener. <br /> <br /> · Install two new 50-foot gravity thickeners. <br /> · Construct new thickened primary sludge pump station. <br />Gravity Belt Thickeners . 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 diffusers. <br /> · Remove effluent gates. <br /> · Install new primary effluent flow control gates. <br /> <br />MWMC_7.0_REV4.DOC 7-! ! <br /> <br /> <br />