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MWMC FACILITIES PLAN <br /> <br />anticipated. Table 7.2.1-1 summarizes the existing and proposed 2025 trait process, <br />equipment, and design criteria. <br /> <br />FIGURE 7.2.2-1 <br />Secondary Clarifier Enhancements <br />MWMC Facilities Plan, Eugene-Springfield <br /> <br /> Relocate Launder Trough <br /> New Scum to Exterior Wall of Clarifier.,, <br /> Dissipating <br /> ' Floc <br /> <br /> !EAS! ~ New Suction Header <br /> Manifold with <br /> Adjustable Orifices <br /> <br />7,2.3 Primary Clarification Enhancements <br />Recommended Enhancements to each of the existing primary clarifiers include the <br />following items and are shown on Figure 7.2.3-1: <br /> <br />· New energy-dissipating inlet <br /> New weir and scum baffle <br /> New feedwell <br />· New scum skimmer arms <br />· New density current baffle <br /> <br />Modifications to the operation of the existing primary clarifiers include thickening of <br />primary sludge outside the clarifiers. This requires a higher primary sludge flow rate to <br />keep sludge from accumulating at the base of the clarifiers. New facilities required to <br />accommodate these operational changes include the following. Table 7.2.1-1 summarizes the <br />existing and proposed 2025 trait process, equipment, and design criteria. <br /> <br />· New primary sludge pumps <br />· New gravity thickeners, or gravity belt thickeners, or other unidentified technology <br />· New thickened primary sludge pump station <br /> <br />7-4 MWMC 7.0 REV4.DOC <br /> <br /> <br />