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V- VS!l <br /> RNA770NAL <br /> Length: 4.0 ft <br /> Width: 7 ft <br /> Water depth: 6 ft <br /> Actual operational volume: 1257 gallons <br /> 2.2 MBBR SYSTEM <br /> ANOXIC ZONE <br /> Internal recycle ratio 2.2 <br /> No. of units 1 <br /> Water depth 6 ft <br /> Operational volume of each tank 1,257 gallons <br /> Actual operational volume 1,257 gallons <br /> Hydraulic retention time 1.2 hr <br /> Tank dimensions: 4'x 7'x 6.5' <br /> Length: 4.0 ft <br /> Width: 7 ft <br /> Height: 6.5 ft <br /> Actual operational volume: 1257 gallons <br /> AEROBIC ZONE <br /> Biomedia filling capacity: 30% <br /> Media required (ft)for BOD: 353 ft' <br /> Specific surface area of media: 152.4 ftz/ft3 <br /> Surface area available on media: 53,767 ft' <br /> Thickness of biofilm: 0.4 mm <br /> Dry density of biofilm: g0 mg/cm3 <br /> Biomass available in tank: 5.4 g/L <br /> No. of units 1 <br /> Water depth 6 ft <br /> Total operational volume 7,540 gallons <br /> Hydraulic retention time: 7.2 hr <br /> Tank dimensions: 24'x 7'x 6.5' <br /> Length: 24.0 ft <br /> Width: 7 ft <br /> Height: 6.5 ft <br /> Actual operational volume: 7540 gallons <br /> 2.3 AIR SUPPLY SYSTEM <br /> OXYGEN REQUIREMENTS <br /> Oxygen required for BODS removal: 67.1 Ib OZ/day <br /> Actual oxygen requirement(AOR)for BODS removal: 2.80 Ib OZ/hr <br /> Correction factor: 0.41 <br /> Total standard oxygen requirement(SOR): 7 Ib OZ/hr <br /> Safety factor: 1.5 <br /> Oxygen flow required: 10 Ib 02/hr <br /> Plant Design Appendix-i-11 of 18 08/22/07 <br />