sand filter design calculation excel

Spreadsheet - Slow sand filter design | BrookepediaA company "Green" Since 1990DAF Filter Sizing SpreadsheetBelow is a link to a DAF-sized spreadsheet developed by HydroFlo Tech. By introducing the main design criteria, you can solve the overall size of DAF based on the load of fluctuating solids. The spreadsheet works in Microsoft Excel 2003 or later. Below is a sample of the spreadsheet. HydroFlo Tech, LLC. The art and science of wastewater treatment For more detailed information go to www. HydroFloTech.com DAF Available Model Company 5 281 Location 8 300 11 320 This spreadsheet will calculate a DAF unit based on TSS & FOG ppm combined, flow rate and acceptable A/S ratio: 15 340 20 361 25 383 Input 31 405 What is the combined content of TSS " FOG ppm wastewater: 3000 38 428 What is the process flow rate (gpm): 250 45 451 Lbs/Sq. Ft./Hr (1.5 Typical) 1.5 53 475 Recycling system pressure (in gage pressure, psi, typically 65 psig) 80 61 500 Efficiency of recycling system (Typically 80,00%) 80% 70 527 Temperature (in Farenheit) 60 80 592 Selected DAF model number based on the required minimum DAF unit (below) and round to the next largest DAF model 263 90 661 101 735 113 815 Call 630-762-0380 to talk to a Hydro Flo application engineer 125 900 138 1.088 Output 151 1.191 lb/gal of TSS = 0.03 165 1.301 Solids Loading TSS ratio per min (lb); 6.26 180 1.416 Solids Loading TSS ratio per hour (lb): 375.50 195 1.539 Solids Loading TSS ratio per day (24 hr period): 9012.10 211 1.668 Concentration of saturation (Lb air/gal H2O) atmospheric pressure 0,0002190 228 1,805 Theoretical air launch (air lb/gal H2O) 0,0009098 245 1 945 Minimum required Ft in the DAF Unit (Separation Room): 250.34 263 2.150 gpm/sq.ft. hydraulic charge rate for only DAF 0.95 Recirculation (RAD) Flow Speed Range Low Recycling Flow Rate (rad) (gpm): 125.00 Listed at the left are the theory RAD flow rates. If these numbers are above 4, increase the selected DAF model # until the output (to the desired recycling rate) is less than or equal to 4 Low gpm/sq.ft. Hydraulic Charge Rate for DAFand selected combinations of theoretical RAD (gpm/sq.ft.): 1.4259 High-end terretic recycling (RAD) Speed flow (gpm): 275.17 High-end Gpm/sq.ft. Hydraulic Charge Rate for the selected theoretical DAFand RAD (gpm/sq.ft): 1.9968 CRITERIA: You must apply the following when dimensioning a DAF Standard Solids Loading Rate: 1.5 lb/sq. ft./hr Never use more than 4 gpm/sq.ft hydraulic charge for the DAF and RAD combined Lbs acceptable Air/Lbs Solids range = 0.015 - 0.040 Normally we apply 100% of the low rate of final RAD flow when BELOW - 3000 ppm Normally we apply 75% of the high end RAD flow rate when BETWEEN 3000 - 5000 ppm Normally we apply 100% high-end RAD flow rate when ABOVE - 5000 ppm Formulas: Recycling flow rate: (Lbs Air/Lbs Solids) x (Solids Loading rate/min) x Theoretical Air Release Dimensions for (Solids Loading rate/min): Lbs/min Dimensions for Theoretic Air Release: 1000 gal/0.62 lbs. @ 75 psig and 68 degrees F Low end (Lbs Air/Lbs Solids) = 0.015 High end (Lbs Air/Lbs Solids) = 0.040 Conversion factors: 1,000 mg = 1 gr 453.59 gr = 1 pounds. 3,785 l = 1 girl. Useful links Main menuLocation Do you have a question? HydroFloTech, Silence 1875 Big Timber Road ← Elgin, IL 60123 Silence Phone 630-762-0380 Silence Fax 630-762-0390 Website designed by:

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