Sbr Design

Population per capita flow per capita flow

1 Flow  Average

Peak factor Peak duration Peak flow

2 Balancing Tank Effectiv e volume HRT at Qavg,hrs  Air required for effect ive mings SBR feed Pumps Sleetced feed Pumps Fill hours 3 SBR- operating details Operating cycle time No of SBR No of cyles per basin Total fill time Anoxic ( non aerated) fill time  Aerated fill time  Aeration time Settlement Time Decant time Idle time Total cycle time No of cycles per basin 5 SBR dimesnions Side water Depth  Area Length   W idth Selected dimesnions area Total volume

12000 350 lps 0.25 m3/capita

3000 125 2.1 0.035 2.50 2 7500 312.5 5.2 0.087 375 3.0 375 125 125 3

6 2 4 3 0.5 2.5 0.5 1 1 0.5 6 4

5 266 19 14 266 1330

m3/d m3/hr m3/min m3/s

m3/d m3/hr m3 m 3/min m3/s m3 hr hrs m3/hr m3 m3/hr hours

hr hrs no hr s hr hrs

BOD per capita BOD LOAD BOD,mg/l

2 Wastewater Wastewater Quality Quality BOD TKN Ammonia TSS Assumptions Elev ation Yield coefficient, Y Kd Clean water efficiency Alpha Beta Sewage Temperature O2 solu.Tap water, field condnC'sw O2 solu.Tap water, 20deg C ,Csw DO Fine Bubble effeciency Design Air temperature 4 SBR Sizing Volume per cycle per basin BOD load, per SBR MLSS to be maitained F/M to be maintained Sludge Volume Index Size Approach -I, F/M based Sludge required Sludge after decant,concn Sludge Volume Approach -2, SVI based settled sludge volume Se le le ct ct ed ed vo vo lu lu me me of of SB SBR a dd dd v ol ol um um e o f d ec ec an an t Volume per basin add band betn Sludge layer/decant Total Volume 6 Water Levels Levels in SBR SBR and MLSS MLSS Depth of decant volume LW L Volume at LW L MLSS Concentration MLSS MLSS Conc Concen entr trat atio ion( n(wi with thou outt band band))

75 900 300

Inlet 300 40 24 300

Outlet 10 1 1 10

50.000 0.650 0.050 5.500 0.5 0.950 35 6.9 9.1 2.000 0.236 45

375.0 450.0 3500 0.1 0.15

m3 m3 kg/d mg/l d- 1 m3 m 3/kg

4500 kgs 6 kg/m3 733.3 m3 675 7 33 33 .3 .3 3 75 75 .0 .0 1108.3 221.67 1330.0

m3 m3 m3 m3 m3 m3

1.410 m 3.6 m 955.0 m3 4712.0 m g/l 6136 6136.4 .4 mg/l mg/l

Units mg/l mg/l mg/l mg/l

7 Decanter Sizing Decant Volume/cycle No fo SBR in decant mode at a time Decant Time in Hours Rate of flow Selected decnater (25 % extra for operational flexibility) 9 Sludge Production Sludge Production rate Sludge Produced SRT,d

11 Sludge Thickener  Solids Loading rate(25-60) Surface loading rate ( 16-30) Solids flow rate  Area of thickener Diameter Selected dia  Area of thickener Conc of thickened sludge Volume of thickned sludge Depth of Thickenening at top at bottom average Volume of sludge Depth Depth of settling zone Clear effluent depth Free Board SWD Depth

a b

13 Air requirements Balancing Tank, at 1 m3/m3/hr Sludge Digestor Expected VS Destruction VS destroyed O2 required O2 required  AOR/SOR for fine bubble SOR diffuser effeciency  Air required  Air supplied per m3 of digestor vol

 

375.0 1 1 375 m3/hr 6.25 m3/min 7.8125 m3/min

0.7 k g/kgBODr 609.0 kg/d 14.1 days

35 24 150.46 103.17 11.46 10 78.5 20 29.563 4.71 20 12.35602 47.852 0.610 1.5 1 0.5 3.11

kg/m2/d m 3/m2/d kg/hr m2 m m kg/m3 m3/d kg/m3 kg/m3 kg/m3 m3 m m m

10 WasteSludge Pump Sludge conc after decant Sludge Volume Per reactor per cycle Sludge Wasting Pump cap 12 Sludge Digestor  VS destruction Degree days(from M&E) HRT Volume of sludge to be digested Volume as 7/5 concept Volume of digestor Sludge in reactor at 2 % conc Temperature at winter Sludge age required Sludge to be withdrawn everyday Volume of sludge withdrawn Consider sludge withdrawal Size of digestor   Depth Length Width

125 468.75 0.8 275 35.2 351.56

Kg/kgVSr

kg/d m3/hr m3/m3/hr

m3/hr   m3/hr   hours m3 min m3

4.7 kg/m3 125.5 m3 15.7 m3 31 m 3/hr  

30 300 7 129.243 129.243 904.7 18637 22 13.636 1366.7 66.345 20

% Days m3/d m3/d kg degC kg/d m3/d m3/d

6 12.279 12.279

m

375

30% 146.16 2 292.32 0.4 730.8 29% 391.9749 0.433263

8 Chlorine Contact Tank Flow rate to filters Max decant rate Duration of Decant Volume of CCT CCT contact period for 45 minutes HRT volume

1.53

SBR Sludge Yield Sludge Produced Kg of BOD removed Nitrogen to be nitrified AOR SOR Air Required Air required at Inlet Duty blowers Each Blower Fill time (Anoxic+Aerated)  Anoxic fill Aerated fill time Settel time Decant time Idle available aeration time Total aeration Time

0.3814 471.19 1278.9 534.69 1342.4 3734.7 2382.7 2586 1 2586 3 0.5 2.5 1 1 0.5 0.5 3

kg/BOD kg/d kg/d kg/d kg/d kg/d m3/hr  nm3/hr   m3/hr