2SBR REACTOR - 550CMD-MAHA POLICE - XLSX

Design Inputs 1 Flow Average operating time

QTY

Peak factor Peak duration Peak flow 2 Wastewater Quality-INLET BOD TKN Ammonia TSS Sewage Temperature ,Minimum Sewage Temperature ,Maximum 3 Wastewater quality-OUTLET BOD TKN Ammonia TSS 4 Assumptions Elevation Design Air temperature Diffuser-Fne Bubble Clean water efficiency Alpha Beta O2 solu.Tap water, 20deg C ,Csw O2 solu.Tap water, field condnC'sw DO 5 Kinetics of Nitrification Cell mass due to BOD removal g TVSS/g/BOD5,(0.5 - 0.7) Cell mass due to NH4-N removal g TVSS/g/NH4-N Mean Cell Residence Time (MCRT) Endogenous decay coefficient, Kd, BOD Maximum specific growth rate for Nitirifiers,(0.3-3),d-1 Minimum DO in aerobic zone,mg/l Half velocity constant for Nitri microbes,( 1-1.3) d-1 Maximum cell yield coeffcient for Nitrification,g VSS/g NH4-N,0.1-0.3 Maximum cell yield coeffcient for Nitrification,g VSS/g NO2-N Endogenous decay coefficient, Kd, Nitrification 0.03-0.06 Org-N in cell biomass NO3-N lost in the effluent Soluble Org.N + NH3-N in effluent TN 6 Kinetics of BOD Removal Cell mass due to BOD removal g TVSS/g/BOD5,(0.5 - 0.7) Endogenous decay coefficient, Kd, Nitrification 0.03-0.06 Calculation 1 Balancing Tank Effective volume Reuired Provided Volume

2SBR REACTOR -550CMD-MAHA POLICE.xlsx

1

550 24 23 2.50 3 1375 57.29 Inlet 250 22 17 250 22 35 Outlet 10 10 1 10 QTY 0 45 5.0 0.5 0.850 9.1 6.9 2.000 Symbol YBOD

unit m3/d m3/hr

m3/d m3/hr Units mg/l mg/l mg/l mg/l degC degC Units mg/l mg/l mg/l mg/l unit m degC %

mg/l mg/l mg/l Adopted 0.70

YNH4-N

θc Kd,BOD

0.15 8 0.06

μmax N DO min,N

0.47 2

KDO N

1

YN

0.2

YDN

0.02

Kd,N mg/l mg/l Symbol YBOD5 Kd,BOD5

0.03 12.2% 9 1 10 Adopted 0.60 0.05

QTY unit 103.125 m3 104 m3

Process Design

184 8.0 hrs 184.00 m3/hr 22.9

HRT at Qavg,hrs Air required for effective mixing SBR feed Pumps However Sleetced feed Pumps

22.9 m3/hr

Fill hours 2 SBR Design 2a SBR- operating details Operating cycle time No of SBR No of cyles per basin Batch Volume per basin Total fill time Anoxic ( non aerated) fill time Aerated fill time React time Settlement Time Decant time Idle time Total cycle time No of cycles per basin Total aeration hours/day 2b Design SRT for aerobic cell growth a Calculate max specific growth rate under filed conditions ,μmax N Temp correction factor FT, N, at design Temperature DO correction factor FDO,N

unit hrs no

hrs hrs hrs hrs hrs hrs hrs hrs

2

0.622

d-1

1.69 1.5

Safety factor process,FKinetics N

2.5

θcreqd,N

Design aerobic Sludge Age θc Aerobic design d Achievable NH4-N and soluble in the effluent k' UN KN NH4-N Soluble BOD in the effluent Sludge growth due to BODr in Aerobic Zone, Px BOD5 Design Cell yield coefficient, Yobs BOD5 Conc increase in cell mass due to BOD5r,mgVSS/l Sludge gowth due to nitrification in Aerobic zone , Px N Design Sludge Yield ,Yobs N, g VSS/g NH4-N Px N, mg VSS/ L Ratio Heterotrophs and Nitrifiers, in the MLVSS Increase in TVSS conc. Due to growth of cell mass Increase in TVSS conc. Due to growth of heterotrophs Ratio Heterotrophs and Nitrifiers, in the MLVSS

2SBR REACTOR -550CMD-MAHA POLICE.xlsx

4 2 6 45.8333 2 0.25 1.75 0.25 1.00 0.50 0.25 4 6 24.00

1

μ'max N b Minimum SRT for Nitrification,θc min,N θcmin,N c Design SRT Safety factor process,Fprocess N

g i ii iii

QTY

0.667

pH correction fraction,FpH

e i ii f

2 hours

2

6.33

d

8.00

d

3.11 0.78

d-1

0.920 0.31 3.72

mg/l mg/l

0.429 105.5 0.16129 1.35 106.9 105.5 0.99

mg VSS/l mg VSS/l

Process Design

iv Fraction of Auotrophs in mixed culture v Px TVSS, mg TVSS/L Px TVSS, kg TVSS/d Px TSS Kg/d or Mixed Liquor Assumptions Operating MLSS MLSS/MLVSS MLVSS 3 SBR Sizing Volume per cycle per basin Approach -1A SRT based Aerobic design, Hrs a Design aerobic HRT required θBOD5

b Design aerobic HRT required θNitrificationAerobic design, Hrs c Volume of Tanks Approach -1B, SRT based using conventional equation Tank volume Fcator of safety Volume of Tanks

Volume per basin add band between Sludge layer/decant Total Volume 4 SBR dimensions Side water Depth Area Length Width Selected dimesnions area Total volume Water Levels in SBR and MLSS Depth of decant volume LWL Volume at LWL Band between settled sludge and LWL MLSS Concentration, at LWL MLSS Concentration(without band) 5 Decanter Sizing Decant Volume/cycle No fo SBR in decant mode at a time Decant Time in Hours Rate of flow

3500 0.8 2800

mg/l Kg/d

mg/l mg/l

45.8 m3 5.9 5.9 67

m3

64.7 64.7 1.0 64.7 Selected volume of SBR 64.7 add volume of decant 45.8 110.5 11.0486 121.0

m3 m3 m3 m3 m3

4 30.3 5.5 5.5 30.3 121.0

m m2 m m m2 m3

1.52 2.48 75.17 0.37 8780 10293.5

m3 m3

m m m3 m mg/l mg/l

45.8 1 0.5 91.6667 m3/hr 1.528 m3/min 1.528 m3/min

Selected decanter (5 % extra for 6 Chlorine Contact Tank Operating Hours Flow rate to filters Max decant rate Duration of Decant Volume of CCT CCT contact period for 45 minutes HRT volume Chlorination Cl2 dosage, mg/lit

2SBR REACTOR -550CMD-MAHA POLICE.xlsx

0.01 106.9 59 73

16 34 91.6667 0.5 57.2917 37.5 68.75

m3/hr m3/hr hours m3 min m3

10.00 mg/lit

3

Process Design

flowrate, m3/hr Chlorine % Req. quantity, lit/hr GPH Req. pump size,g/h 5 day storage,gallons Filter Feed Pumps No of duty pumps Capcity of each duty pump no of stand by pumps Press. Sand Filters Filter.rate,m3/m2/h Area for Filteration,m2 No of duty filters Area / filter, m2 Dia of filter, m Select suitable dia,m Check ROF at selected dia Backwash Pumps Duty Pumps Cap,m3/hr ,@ 20MWC Air Scour scouring rate Air required Duration of Bakcwas Duration of Air scour Total volume to be added to CCT ACTIVATED CARBON Filters Filter.rate,m3/m2/h Area for Filteration,m2 No of duty filters Area / filter, m2 Dia of filter, m Select suitable dia,m Check ROF at selected dia 7 Sludge Production Kg of solids produced Total TSS in effluent , kg/d Kg of solids as WAS SRT,d Volume of WAS,m3/d Volume of effluent discharged, m3/d per batch 7 WasteSludge Pump Sludge conc after decant Sludge Volume Per reactor per cycle Sludge Wasting Pump cap

2SBR REACTOR -550CMD-MAHA POLICE.xlsx

22.92 0.10 2.29 0.61 0.79 36.33

m3/hr % lit/hr gph g/h gallons

1 34.85 1.00 12.00 2.90 1.00 2.90 1.92 2.00 11.09 1 94.20 50 157 15 15 11.4583

m3/hr/m2 m3/hr minutes minutes m3

12.00 2.90 1.00 2.90 1.92 2.00 11.09 73 kg/d 5.5 kg/d 68 kg/d 10.7 days 6.6 m3/d 543 m3/d 45.28 10.3 6.4 0.5 2

4

kg/m3 m3 m3 m3/hr

Process Design

9 Air requirements a Balancing Tank, at 1 m3/m3/hr b SBR Sludge Yield Sludge Produced Kg of BOD removed Nitrogen to be nitrified AOR SOR Fine Bubble effeciency Air Required Air required at Inlet Duty blowers Each Blower

2SBR REACTOR -550CMD-MAHA POLICE.xlsx

184

80.33 198.08 30.72 178.17 583.97 0.1471 747.79 812 2 405.8

5

kg/BOD kg/d kg/d kg/d kg/d kg/d m3/hr nm3/hr no m3/hr

Process Design