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Example Calculations Evaluation for Fine Bubble …

Example CalculationsEvaluation for fine Bubble Aeration SystemRevision Date6/10/02 9:52 Red Valve RepresentativeRed Valve Company, NORTH BELL AVENUECARNEGIE, PA 15106-0548 PHONE (412) 279-0044 FAX (412) 279-5410 Sample Air Diffuser ,000,000gpd15, , , O2/lb O2/kg O2/lb O2/kg BODMLSS Concentration at Design2300 Depth (Dp) Barometric Pressure (Pa) Pressure at Mean Sea Level (Pmsl) Oxygen Saturation at 20 C (Cs) Oxygen Saturation at Temp (Cst) Saturation of Diffuser at Depth (Cd) Oxygen Level (DO) Water Temperature (T) Saturation at Temperature (Ccr) Airflow at design conditions0scfmDensity of Air at Sea Level and ^3 Density of Air Correction ^3 Solution Transfer Efficiency FactorRange ( - )Influent Dissolved Oxygen Concentrationmg/lRequired Effluent Dissolved Oxygen Concentrationmg/lInput Parameters for Post Aeration SystemsProcess Design ValuesOxygen Transfer Efficiency ValuesBlower Parameters for Horsepower SizingInlet Blower Air TemperatureFood to BioMass ratio F/MPre-Determined Oxygen Uptake Rate to be AppliedCorrected Density of Air at Site Elevation & TempDiffus

Example Calculations Evaluation for Fine Bubble Aeration System Revision Date 6/10/02 9:52 Red Valve Representative Red Valve Company, Inc. …

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Transcription of Example Calculations Evaluation for Fine Bubble …

1 Example CalculationsEvaluation for fine Bubble Aeration SystemRevision Date6/10/02 9:52 Red Valve RepresentativeRed Valve Company, NORTH BELL AVENUECARNEGIE, PA 15106-0548 PHONE (412) 279-0044 FAX (412) 279-5410 Sample Air Diffuser ,000,000gpd15, , , O2/lb O2/kg O2/lb O2/kg BODMLSS Concentration at Design2300 Depth (Dp) Barometric Pressure (Pa) Pressure at Mean Sea Level (Pmsl) Oxygen Saturation at 20 C (Cs) Oxygen Saturation at Temp (Cst) Saturation of Diffuser at Depth (Cd) Oxygen Level (DO) Water Temperature (T) Saturation at Temperature (Ccr) Airflow at design conditions0scfmDensity of Air at Sea Level and ^3 Density of Air Correction ^3 Solution Transfer Efficiency FactorRange ( - )Influent Dissolved Oxygen Concentrationmg/lRequired Effluent Dissolved Oxygen Concentrationmg/lInput Parameters for Post Aeration SystemsProcess Design ValuesOxygen Transfer Efficiency ValuesBlower Parameters for Horsepower SizingInlet Blower Air TemperatureFood to BioMass ratio F/MPre-Determined Oxygen Uptake Rate to be AppliedCorrected Density of Air at Site Elevation & TempDiffuser distance from bottom of tankDesign Plant FlowrateLbs of Oxygen required per lb.

2 Of BOD removed Lbs of Oxygen Required per lb. Of NH3 removedDesign COD influent concentrationDesign COD effluent concentrationPre-Determined AOR Value to be AppliedDesign BOD influent concentrationDesign BOD effluent concentrationDesign NH4 influent concentrationDesign NH4 effluent concentrationExample CalculationsEvaluation for fine Bubble Aeration SystemInput Data & Design Parameters for Biological / Chemical Process Systems6/10/02 Red Valve Company, 2 of 11US UNITSA erationConicalAerationAerationWaterSurfa ceBottomDimensionalLiquidAORTankLengthWi dthDepthAreaVolumeVolumeVolumeDistributi onfeetfeetfeetsq. feetcubic ,00064,000478,72025% ,00064,000478,72025% ,00064,000478,72025% ,00064,000478,72025% 4 Number of Tanks16,000256,0001,914,880100% UNITSA erationConicalAerationAerationSurfaceBot tomDimensionalLiquidAORTankLengthWidthDe pthAreaVolumeVolumeVolumeDistributionmet ersmetersmeterssq.

3 Meters meter^3cubic ,8121,811,95525% ,8121,811,95525% ,8121,811,95525% ,8121,811,95525% 1,4867,2497,247,821100% CalculationsEvaluation for fine Bubble Aeration SystemRECTANGULAR TANK DIMENSIONS6/10/02 Red Valve Company, 3 of 11 Biological TreatmentBOD LoadingFood to BiomassMLSSFine BubbleCoarse BubbleMechanicalTen StatesProcess Typelbs. BOD (2)1000 Tank VolumeF / Mmg/llbs. 02 / lb. of BODlbs. 02 / lb. of BODlbs. 02 / lb. of BODlbs. 02 / lb. of BODE xtended Aeration10 to to to to to to Ditch5 to to to to to to Stage Nitrification5 to to to to to to Batch Reactor5 to to to to to to Flow / Complete Mix20 to to to to to to Rate Aeration100 to to to 10, to to to TreatmentBOD LoadingFood to BiomassMLSSFine BubbleCoarse BubbleMechanicalTen StatesProcess Typelbs.

4 BOD (2)1000 Tank VolumeF / Mmg/llbs. 02 / lb. of TKNlbs. 02 / lb. of TKNlbs. 02 / lb. of TKNlbs. 02 / lb. of TKNE xtended Aeration10 to to to to to to Ditch5 to to to to to to Stage Nitrification5 to to to to to to Batch Reactor5 to to to to to to Flow / Complete Mix20 to to to to to to Rate Aeration100 to to to 10, to to to TableExample CalculationsEvaluation for fine Bubble Aeration SystemActual Oxygen Required (AOR) (1)Process ParametersCarbonaceous BOD5 RemovalNitrification of AmmoniaProcess ParametersActual Oxygen Required (AOR) (1)Oxygen Requirements for Biological Treatment Processes1. AOR Ratio Values listed are typical operating values, a safety factor of should be applied for blower capacity Recommended value if treatibility design data is unavailable for the Valve Company, 4 of 117,339lbs/day3, BOD / 1000 Tank , ,913,043 GAL7,241,658L1,914,880 GAL7,248,610 LApplied Food to (Bio)Mass Ratio F/M =MLSS Mass =BOD / (F/M ) =Required MLSS Concentration =Tank Volume Required = (MLSS Mass) / [(MLSS Conc.)]

5 X )]Tank Liquid Volume Required =Existing Tank Volume or Tank Volume Specified by Client =BOD Loading = Example CalculationsEvaluation for fine Bubble Aeration SystemCheck Aeration Tank Volume Required Based on Food to (Bio)Mass RatioDesign BOD to be removed =BIOLOGICAL TREATMENT PROCESS6/10/02 Red Valve Company, 5 of 11 BOD Influent Effluent Flow Capacity240mg/l20mg/l4,000,000 GPDT otal Influent BOD MassTotal Effluent BOD Mass8, BOD mass to be removed7, ,329kg/dayLbs. of Oxygen required per lb. of BOD BODO xygen required for BOD removal8, ,662kg/dayNH3 Influent Effluent Influent NH3 MassTotal Effluent NH3 Mass1, NH3 mass to be removed1, of Oxygen required per lb. of NH3 NH3 Oxygen required for NH3 removal3, ,725kg/dayCOD Influent Effluent Influent COD MassTotal Effluent COD Mass26, , Demand = ( Alpha x COD x R ) + ( Beta x ( COD / FM ))Alpha = = Oxygen Utilization Coefficient for Synthesis, lb/lbBeta = = Oxygen Utilization Coefficient for Endogenous Respiration, lb/lbCOD = 11,676 COD = COD loading to Aeration Tank, lbs/dayR = 1R = % Reduction of CODFM = = Food to Biomass RatioTotal COD mass to be removed11, ,296kg/dayOxygen Required for COD Removal 10,508lbs/day4,767kg/dayExample CalculationsEvaluation for fine Bubble Aeration SystemActual Oxygen Required (AOR)

6 Based on BOD, COD and NH3 Loading6/10/02 Red Valve Company, 6 of 11 Oxygen Uptake Rate0mg/l/hrAOR1 AOR per Uptake for BOD & NH3 removal11, ,387kg/dayAOR3 AOR for COD10, ,767kg/dayAOR4 AOR as Specified by Owner12, , as Required by Digestor4, , AOR(maximum of AOR1, AOR2, AOR3,AOR4 & AOR5)12, ,443kg/dayAOR (24 hr. day) (24 hr. day)Based on COD, BOD, NH3 and Uptake RatesExample CalculationsEvaluation for fine Bubble Aeration SystemSelected - Actual Oxygen Required (AOR)6/10/02 Red Valve Company, 7 of 11 AOR = Actual Oxygen Transferred into wastewater solutionSOTR = Oxygen transfer rate based on clean , , ,888kg/hrlbs/hrkg/hrlbs/hrscmmscfmunitsF INE Bubble AIRFLOW AND EFFICIENCYAir flowrate per Efficiency per foot Diffuser efficiency (De)

7 Transfer efficiency40%Headloss per diffuserExample CalculationsEvaluation for fine Bubble Aeration SystemFINE Bubble DIFFUSER SYSTEMN umber of fine Bubble Diffusers and Total Airflow Required6/10/02 Red Valve Company, 8 of 11 Applied Design Unit Airflow Rate per Minimum Design for MLSS up to 2500 for MLSS up to 3500 for MLSS up to 4500 mg/lSurfaceSurfaceQuantity of AreaAreaFine Bubble metersscfmscmmRequired14, , , , , , , RateRequiredExample CalculationsEvaluation for fine Bubble Aeration SystemFINE Bubble DIFFUSER SYSTEMD esign Check - Airflow Required for Complete Mixing based on Surface Area of TankNote: If the Total Airflow Rate calculated on this sheet exceeds the Airflow Rate calculated to provide sufficient oxygen, then these values should be applied to ensure sufficient mixing is provided for the Valve Company, 9 of 1164, Sludge Flowrate90,000gallons / - dayPercent Solids in , SludgeTotal Mass of Sludge in Sludge8, Sludge(Maximum from Method 1 & Method 2)80%6, (30-40 % Standard)1, lbs.

8 Volatile solids4, Design Value(10-15 Waste activated sludge only)Check Hydraulic Retention (12-18 Activated sludge without settling(15-20 Primary + Secondary sludge)Mass of Oxygen RequiredActual Oxygen Transfer Rate (AOR)Total Volatiles ReducedUnit Rate for Oxygen RequirementTotal Mass of Volatile Solids% Reduction of Volatiles through Digestion% Volatiles in Total MassTotal Mass of Sludge in InfluentVolatile Solids Loading ( - )Total Mass of Sludge in InfluentExample CalculationsEvaluation for fine Bubble Aeration SystemOxygen Required for Volatile Solids ReductionMethod 2 Method 1 Waste Sludge Volume DeterminationVolume of Tank6/10/02 Red Valve Company, 10 of 11 Water Depth at Diffusers (DWD) = System Operating Airflow (SCFM) = 3, of Operating Blowers = per Blower = 1, per Diffuser = Blower Temperature (T) = Barometric Pressure (BP) = Efficiency Estimate = 70%Headloss - Hydrostatic = - Piping = - Diffusers = Headloss = Gauge Pressure = Discharge Atm Press = = Rate = Blower Airflow (ICFM) = 4, Blower Output HP = Blower Brake HP = Combined Output HP = Combined Brake HP = CalculationsEvaluation for fine Bubble Aeration SystemFINE Bubble DIFFUSER SYSTEMAPPLIED AIRFLOW BASED ON OXYGEN DEMAND REQUIREMENTS6/10/02 Red Valve Company, 11 of 11)


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