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6. DEVELOPMENT AND EVALUATION OF ALTERNATIVES <br /> <br />FSL VSS loading rates be closely monitored as upstream process improvements and <br />additions are implemented. <br /> <br />With Phase 1 of the BF becoming operational in the summer of 2004, the future <br />recommended operating strategy for processing solids in the FSLs should be as follows: <br /> <br />· Apply liquid biosolids from the FSLs to the BF at the maximum non-irrigated capacity of <br /> the BF <br /> <br />· Dewater biosolids in the BFPs on a regular operating schedule, from March through <br /> September <br /> <br />Key elements of this operating strategy are listed below: <br /> <br />Biocycle Farm <br />· 165 acres will be available in Phase 1, to be online in the summer of 2004 <br />· 130 acres will be available in Phases 2 and 3, to be online in 2006 and 2008, respectively <br />· The BF is assumed to be non-irrigated <br /> <br />Belt Filter Presses <br />· Operation: March through September, 12 hrs/day, 5 days/week, all units online <br /> approximately 85 percent of the time <br /> <br />· BFP pressate recycle is 42.5 million gallons (MG)/year to the FSLs, with 300 gallons per <br /> minute (gpm) of washwater <br /> <br />Facultative Sludge Lagoons <br />· Solids are harvested at approximately 3 percent dry solids <br />· The current solids depth is approximately 10 feet (72 MG) <br />· The optimal depth of the solids blanket is 6 feet <br />· Normal total operating depth is 13.5 feet (102 MG) <br />· Annual precipitation is 44 inches (29.9 MG/year) <br />· Annual liquids evaporation is 35 inches (23.8 MG/year) <br />· A maximum of 206 MG of supernatant can be pumped from the FSLs; however, typical <br /> operation is most likely to be 100 MG/year <br /> <br />Graphical results of this operating strategy are shown in Figure 6.5.3-2. As can be seen from <br />Figure 6.5.3-2, the solids inventory could be reduced to an optimal solids depth of 6 feet <br />(41 MG) between year 2006 and 2007. This assumes that the operating conditions listed <br />above are followed. Reducing the solids inventory in this time frame would require the <br />dredge pump to operate at a maximum pumping rate of less than 600 gpm. The dredge has <br />a capacity of 2000 gpm. Capacities for the dewatering equipment and the BF are listed in <br />section 3.2.2 in Chapter 3.0. <br /> <br />MWMC_6.0_REV11.DOC 6-41 <br /> <br /> <br />