DAF sizing.xls

8/11/2019 DAF sizing.xls

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Company 5 281Location 8 300

11 32015 34020 36125 383

Input 31 405What is the combined TSS & FOG ppm content of wastewater: 3000 38 428

What is the process flow rate (gpm): 250 45 451Lbs/Sq. Ft./Hr (1.5 Typical) 1.5 53 475

Recycle System Pressure (in gage pressure, psi , typically 65 psig) 80 61 500Recycle System Efficency (Typically 80.00%) 80% 70 527

Temperature (in Farenheit) 60 80 592263 90 661

101 735

113 815125 900138 1,088

Output 151 1,191lb/gal of TSS = 0.03 165 1,301

Solids Loading ratio of TSS per min (lb); 6.26 180 1,416Solids Loading ratio of TSS per hour (lb): 375.50 195 1,539

Solids Loading ratio of TSS per day (24 hr period): 9012.10 211 1,668Saturation Concentration (lb air/gal H2O) at atmospheric pressure 0.0002190 228 1,805

Theoretical Air Release (lb air/gal H2O) 0.0009098 245 1,945Minimum required Sq. Ft. in DAF Unit (Separation Chamber): 250.34 263 2,150

gpm/sq.ft. hydraulic loading rate for Selected DAF Alone 0.95

Recirculation (RAD) Flow Rate RangeTheoretical Low End Recycle (RAD) Flow Rate (gpm): 125.00

1.4259

Theoretical High End Recycle (RAD) Flow Rate (gpm): 275.171.9968

CRITERIA: You must apply the following when sizing a DAFStandard Solids Loading Rate: 1.5 lb/sq. ft./hr Never use more than 4 gpm/sq.ft hydraulic loading rate for the DAF and RAD combined

Acceptable Lbs Air/Lbs Solids range = 0.015 - 0.040We typically apply 100% of the low end RAD flow rate when BELOW - 3000 ppmWe typically apply 75% of the high end RAD flow rate when BETWEEN 3000 - 5000 ppmWe typically apply 100% of the high end RAD flow rate when ABOVE - 5000 ppm

Formulas:Recirculation Flow Rate:(Lbs Air/Lbs Solids) x (Solids Loading Rate/min) x Theoretical Air ReleaseDimensions for (Solids Loading Rate/min): Lbs/minDimensions for Theoretical Air Release: 1000 gal/0.62 lbs. @ 75 psig and 68 degrees FLow end (Lbs Air/Lbs Solids) = 0.015High end (Lbs Air/Lbs Solids) = 0.040

Conversion Factors:1,000 mg = 1 gr 453.59 gr = 1 lb.3.785 l = 1 gal.

Low end gpm/sq.ft. hydraulic loading rate for selected DAFandtheoretical RAD combined (gpm/sq.ft.):

High end gpm/sq.ft. hydraulic loading rate for the selected DAFandtheoretical RAD combined (gpm/sq.ft.):

Hydro-Flo Technologies, Inc.The Art and Science... of Wastewater Treatment

For more detailed information go to www.HydroFloTech.com

Call 630-762-0380 to talk to a Hydro-Flo application engineer

AvailableDAF Model #'s

Listed at the left are

the theoretical RADflow rates.

If these numbers areabove 4, increasethe selected DAFmodel # until theoutput (at thedesired recycle rate)is less than or equalto 4

This spreadsheet will calculate a DAF unit based on ppm of TSS &FOG combined, Flow rate and acceptable A/S ratio:

Selected DAF model number based on minimum required DAF unit(below) and round up to the next larger DAF model


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Hydro-Flo Technologies, Inc.The Art and Science... of Wastewater Treatment

CompanyLocation

This spreadsheet will calculate a DAF unit based on ppm of TSS & FOG combined, Flow rate and acceptable A/S ratio:

InputWhat is the combined TSS & FOG ppm content of wastewater: 2000.000

What is the process flow rate (gpm): 30.000Lbs/Sq. Ft./Hr (1.5 Typical) 1.500

Recycle System Pressure (in gage pressure, psi) 40.000Recycle System Efficency (Typically 80.00%) 0.800

Temperature (in Farenheit) 40.000Selected DAF model number based on minimum required DAF unit (below) and round up to the next larger DAF model 25.000 136

Outputlb/gal of TSS = 0.02

Solids Loading ratio of TSS per min (lb); 0.5007Solids Loading ratio of TSS per hour (lb): 30.0403

Solids Loading ratio of TSS per day (24 hr period): 720.9682753

Saturation Concentration (lb sat. N2/gal H2O) 0.00Theoretical Air Release (lb sat. N2/gal H2O) 0.00

Minimum required Sq. Ft. in DAF Unit (Separation Chamber): 20.0269gpm/sq.ft. hydraulic loading rate for Selected DAF Alone 1.2000

Recirculation (RAD) Flow Rate RangeTheoretical Low End Recycle (RAD) Flow Rate (gpm): 17.23

Low end gpm/sq.ft. hydraulic loading rate for selected DAFand theoretical RAD combined (gpm/sq.ft.): 1.8893

Theoretical High End Recycle (RAD) Flow Rate (gpm): .

High end gpm/sq.ft. hydraulic loading rate for the selected DAFand theoretical RAD combined (gpm/sq.ft.): 3.0381

CRITERIA: You must apply the following when sizing a DAFStandard Solids Loading Rate: 1.5 lb/sq. ft./hrNever use more than 4 gpm/sq.ft hydraulic loading rate for the DAF and RAD combined

Acceptable Lbs Air/Lbs Solids range = 0.015 - 0.040We typically apply 100% of the low end RAD flow rate when BELOW - 3000 ppmWe typically apply 75% of the high end RAD flow rate when BETWEEN 3000 - 5000 ppmWe typically apply 100% of the high end RAD flow rate when ABOVE - 5000 ppm

Formulas:Recirculation Flow Rate:(Lbs Air/Lbs Solids) x (Solids Loading Rate/min) x Theoretical Air ReleaseDimensions for (Solids Loading Rate/min): Lbs/minDimensions for Theoretical Air Release: 1000 gal/0.62 lbs. @ 75 psig and 68 degrees FLow end (Lbs Air/Lbs Solids) = 0.015High end (Lbs Air/Lbs Solids) = 0.040

Conversion Factors:1,000 mg = 1 gr 453.59 gr = 1 lb.3.785 l = 1 gal.


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y = 0.0000000000003890387392394340x 4 - 0.0000000002489519246662290000x 3 + 0.0000000625810829993414000000x 2 -0.0000075210690787045200000000x + 0.0004937240162169630000000000

R = 0.9998543788413200000000000000

0.0001

0.00015

0.0002

0.00025

0.0003

0.00035

0 50 100 150 200 250

S a

t u r a

t i o n

C o n c e n

t r a

t i o n

( i n

l b a

i r / g a

l H 2 O )

Temperature (in F)

Saturation Concentration (in lb air/gal H2O) versus Temperature (in F)


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y = 0.0000000000002814456857793070x 4 - 0.0000000001821817044175490000x 3 + 0.0000000465407983743241000000x 2 -0.0000056836326763265600000000x + 0.0003842774490240490000000000

R = 0.9996384943603600000000000000

0.0001

0.00012

0.00014

0.00016

0.00018

0.0002

0.00022

0.00024

0.00026

0 50 100 150 200 250

S a

t u r a

t i o n

C o n c e n

t r a

t i o n

( i n

l b s a

t . n

i t r o g e n

/ g a

l H 2 O )

Temperature (in F)

Saturation Concentration (in lb sat. nitrogen/gal H2O) versus Temperature (in F)


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deg C deg FH (Henry's Law

Constant for air)

H (Henry's Law

Constant foratmos. Nitrogen)

Sat. Conc (inmg/L) for air

0 32 4.32 5.29 37.165640835 41 4.88 5.97 32.90073123

10 50 5.49 6.68 29.2450944315 59 6.07 7.38 26.4506702520 68 6.64 8.04 24.1800554825 77 7.2 8.65 22.299384530 86 7.71 9.24 20.8243279435 95 8.23 9.85 19.5085745340 104 8.7 10.4 18.4546630345 113 9.11 10.9 17.62410191

50 122 9.46 11.3 16.972047460 140 10.1 12 15.8965909370 158 10.5 12.5 15.2910065180 176 10.7 12.6 15.0051933190 194 10.8 12.6 14.86625633

100 212 10.7 12.6 15.00519331

Hydro-Flo TechnoloThe Art and Science... of Wastewater Treatm


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Sat. Conc (in

mg/L) for sat.nitrogen

Sat. Conc (inlb/gal) for air

Sat. Conc (in

lb/gal) for sat.nitrogen

29.40558941 0.000310136 0.00024538126.05620905 0.000274547 0.00021743123.28676168 0.000244041 0.00019432121.07799024 0.000220723 0.00017588919.34770746 0.000201775 0.00016145117.98330266 0.000186082 0.00015006516.83501818 0.000173773 0.00014048315.79244345 0.000162793 0.00013178314.95726615 0.000153999 0.00012481414.27115303 0.000147068 0.000119088

13.76597947 0.000141627 0.00011487312.962964 0.000132652 0.00010817212.44444544 0.000127599 0.000103845

12.34568 0.000125214 0.00010302112.34568 0.000124054 0.00010302112.34568 0.000125214 0.000103021

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DAF sizing.xls

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