rev 0 stp tuscan city 26-05-12
DESCRIPTION
Design report of STPTRANSCRIPT
Mathematical Modeling of STP M/s. Tuscan City, Kundli, Sonepat, Haryana,.
Document No. MM/STP/D076/12-13
Project Management Consortium-Environment Rev.-0 date- 26-05-12 Page 1 of 15
Developed By Approved By
Mathematical Modeling of STP M/s. Tuscan City, Kundli, Sonepat, Haryana,.
Document No. MM/STP/D076/12-13
MATHEMATICAL MODELING
FOR EFFLUENT TREATMENT PLANT
FOR
Tuscan City,
Kundli, Sonepat,
Haryana, INDIA
Elaborated by:
Project Management Consortium- Environment,
# 441 Sector 16 Sikandra Avas Yojna Sikandra,
Agra 282007
[email protected]; [email protected]
Project Management Consortium-Environment Rev.-0 date- 26-05-12 Page 2 of 15
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Mathematical Modeling of STP M/s. Tuscan City, Kundli, Sonepat, Haryana,.
Document No. MM/STP/D076/12-13
Contents
OBJECT KEPT IN VIEW FOR DESIGNING ETP...........................................................................4
1.0 SEWEAGE TREATMENT PLANT DESIGN CONCEPT.....................................................4
2.0 Estimation of discharge from the site ‘Tuscan City”................................................................5
3.0 EXPECTED RAW INFLUENT CHARACTERISTICS:.........................................................5
3.1 EVALUATION OF LOADS AT PRIMARY TREATMENT:................................................5
Chart 1- Schematics of Sewage Treatment Plant.................................................................................6
4.0 DESIGN OF BAR SCREEN, OIL & GREASE SAPRATOR......................................................7
5.0 DESIGN FOR EQULIZATION TANK...................................................................................7
6.0 CALCULATION FOR ANAEROBIC ZONE (UASB)......................................................8
7.0 DESIGN AERATION TANK VOLUME (MMBR REACTOR).........................................10
8.0 DESIGN OF SECONDARY SETTLING TANK (TUBE SETTLER)............................12
9.0 SLUDGE DISPOSAL:...........................................................................................................13
10.0 TREATED WASTEWATER DISPOSAL (BY OZONE):....................................................13
11. SUMMARY OF MATHEMATICAL MODELING..............................................................13
Project Management Consortium-Environment Rev.-0 date- 26-05-12 Page 3 of 15
Developed By Approved By
Mathematical Modeling of STP M/s. Tuscan City, Kundli, Sonepat, Haryana,.
Document No. MM/STP/D076/12-13
OBJECT KEPT IN VIEW FOR DESIGNING ETP
Keep the power consumption to minimum Keep minimum dosing of chemicals Recovery of Bio gas if required by the project proponent. Minimum human intervention with self sustainability as prime object.
1.0 SEWEAGE TREATMENT PLANT DESIGN CONCEPT
Sewage is proposed to be treated by well documented, established & energy efficient
combination of UASB based Anaerobic & Aerobic Attached growth process.
In this process, Effluent containing high protein & fast bio-degrading organic waste is first
hydrolyzed by EM* biomass (mixture of microorganisms consisting mainly of lactic acid
bacteria, purple bacteria, and yeasts which co-exist for the benefit of whichever
environment they are introduced.) treated in anaerobic condition in UASB reactor .
The waste water is further treated in presence of Air (Oxygen & Nitrogen both) by diffusers
or surface aerators are often suggested as the oxygen transfer device in the aeration
tanks.
Hydrolyzed organic mass increases resultant soluble COD, which enhance the
effectiveness of up flow sludge blanket reactor. This Process generates carbon dioxide,
Methane Gas as byproducts,
Anaerobic Treated water is fed to aeration zone to reduce the BOD and generation of
pathogen bacteria in water thus polishing the water.
Targeted BOD removal is to be achieved up to 93~95%. Therefore, the ETP has been
designed to ensure BOD removal of 20% in primary treatment, and 85 % in the secondary
treatment. 95 % in polishing unit. With these efficiencies, the final treated effluent shall
discharge BOD < 30 mg/l.
*It is reported that EM (Effective Micro organism) include:
Lactic acid bacteria: Lactobacillus plantarum; L. Casei; Streptococcus Lactis.
Photosynthetic bacteria: Rhodopseudomonas Palustris; Rhodobacter Sphaeroides. Yeast:
Saccharomyces Cerevisiae; Candida Utilis (usually known as Toula, Pichia Jadinii).
Actinomycetes: Streptomyces Albus; S. Griseus. Fermenting fungi: Aspergillus oryzae;
Mucor Hiemalis.
Project Management Consortium-Environment Rev.-0 date- 26-05-12 Page 4 of 15
Developed By Approved By
Mathematical Modeling of STP M/s. Tuscan City, Kundli, Sonepat, Haryana,.
Document No. MM/STP/D076/12-13
2.0 Estimation of discharge from the site ‘Tuscan City”
No of dwelling unitsin towers 862Convenient shopping 0EWS housing 0Total 862No. of persons/unit 5water supply to units 145 Lt/D/Ctotal supply to units 624.95 KLDexpected discharge @ 80% 500 KLDDesign Treatment capacity @ 10% extra 550 KLD
3.0 EXPECTED RAW INFLUENT CHARACTERISTICS:
PARAMETERS Quantity TargetFlow, m3/day 500 550COD, mg/l 850-2000BOD, mg/l 400 <30TDS, mg/l 2000TSS, mg/l <100 <100
3.1 EVALUATION OF LOADS AT PRIMARY TREATMENT: Inlet streams, Leads influent to grit settlers, at a discharge rate of 550 m3/day with BOD of
400 mg/l will give BOD load to primary tube settler = 550x0.4 =220 kg/d.
Project Management Consortium-Environment Rev.-0 date- 26-05-12 Page 5 of 15
Developed By Approved By
Mathematical Modeling of STP M/s. Tuscan City, Kundli, Sonepat, Haryana,.
Document No. MM/STP/D076/12-13
Chart 1- Schematics of Sewage Treatment Plant
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Sewage transportation by
sewer linesSump well Grit settlers
Equlisation tank Multi cell UABS ReactorFAB Reactor
Tube settler for secondry settling
60 KL treated water storage
tank
Disinfection treatment by
Ozone
Disposal the hotriculture or HUDA sewer
``````
Filter Press for sludge
compaction
Disposal to Hotriculture after
composting
Mathematical Modeling of STP M/s. Tuscan City, Kundli, Sonepat, Haryana,.
Document No. MM/STP/D076/12-13
4.0 DESIGN OF BAR SCREEN, OIL & GREASE SAPRATOR
Since wastewater is coming to the STP without any pre filtration or collection sump It is planned to have one bar screen with opening of 20 mm followed by velocity type Oil & grease trap Cum grit settler.Minimum HTR in section is 10 min at peak flow Maximum velocity of 0.25 m/s.
5.0 DESIGN FOR EQULIZATION TANK
Equalization tank dimensions
Inlet flow m3/d 550
Average Hydraulic Loading 22.91 KL/H
HRT required for proper equalization of wastewater 6 hrs. or total volume required 137.49 or 140 m3
Depth required for the equalization is 5 m thus plan area required for the same will be 28 or 30 m2.
Recommended L X W for equalization is 7 X 4 as per site condition.
5.2 Assuming 10 % BOD removal in equalization tank BOD load at inlet of Down flow
anaerobic reactor will be 200 kg/day. For further calculation 400 mgl.
Project Management Consortium-Environment Rev.-0 date- 26-05-12 Page 7 of 15
Developed By Approved By
Mathematical Modeling of STP M/s. Tuscan City, Kundli, Sonepat, Haryana,.
Document No. MM/STP/D076/12-13
6.0 CALCULATION FOR ANAEROBIC ZONE (UASB)
6.1 System is designed on down flow anaerobic reactor
Influent 500 KLD0.5 MLD
designed flow 525 KLD
Average flow rate 21.87Cu m/ hr
Parameter selected
pH7.3 ~ 7.7
BOD 400 mg/lCOD 900 mg/lSO4 105 mg/lTSS 395 mg/lVSS 270 mg/lSRT value desired 20~30 days
Assume BOD removal efficiency 80 %I.e. Targeted UASB effluent BOD 80 mg/l
Sludge productionVSS produce in process 32 mg/lNon degradable 162 mg/lAsh receive in influent 125 mg/lTotal sludge produce 319 mg/lor 159 Kg/day
SRT & HRT value
SRT ( Sludge retention Time) 25 daysDepth of Sludge blanket 2.5 mEffectiveness Coeff. 0.8Average Concentration of sludge in blanket 70
Kg/ Cum
Length of reactor 4 mHRT 10.94 Hr
Up flow Velocity @ average flow 0.4 m/hrReactor dimensionsPlan area required 57 Sq mNo of Cell required 4
Project Management Consortium-Environment Rev.-0 date- 26-05-12 Page 8 of 15
Developed By Approved By
Mathematical Modeling of STP M/s. Tuscan City, Kundli, Sonepat, Haryana,.
Document No. MM/STP/D076/12-13
area of each cell 14.44 Sq mLength. 3.8 Mwidth 3.8 M
if CircularDia of UASB each Cell 4.8
Check for organic loading
Volumetric organic loading 1.55 Kg/Cum/day
Range 1-3 Kg/Cum/day
6.2 Reduction of BOD from Anaerobic Zone is 80% of 400 mg/l
Thus outlet BOD expected 80 mgl.
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Mathematical Modeling of STP M/s. Tuscan City, Kundli, Sonepat, Haryana,.
Document No. MM/STP/D076/12-13
7.0 DESIGN AERATION TANK VOLUME (MMBR REACTOR)
BOD in (mg/l) 100 Flow (m3/day) 550BOD out (mg/l) <20 Type of Effluent domestic Sewage
Tank Size (L x B) 6X3.03 MXM
Tank Volume 82.0 m3 L (mtr.) = 3.0Top Area 18.2 m2 B (mtr.) = 6.0Bottom Area 18.2 m2SWD 4.5 mEffective Depth 4.3 mPipe Aerator Density 12.3 %Meter length of Pipe Aerators 14 MtrsMembrane area 2.24 m2No. of Laterals 2 nos.Total length of laterals 10 mtrs.No. of aerator per Lateral 14 Nos.Center-to-center distance b/n aerators 0.38 mEnd-to-end distance b/n aerators 0.6 m (approx. value)Air Quantity in Sm3/hr 115.0 Sm3/hrAir Quantity in m3/hr 135.2 m3/hr
Pressure drop expected 0.55kg/cm2
Aerator throughput rate 8.22 Sm3/hr/m aeratorMembrane throughput rate 51.35 Sm3/hr/m2 membraneField Correction Factor 0.57Oxygen suggested at FIELD condition (A.O.R) 5.00 kgO2/hrOxygen required at standard condition (S.O.R) 8.75 kgO2/hrS.O.T.E 27.27 %A.O.T.E 15.58 %SOTE/m water column 6.34 %Standard Oxygenation Capacity 17.70 gmO2/m3 air/m i.d.Actual Oxygenation Capacity 10.11
gmO2/m3 air/m i.d.
Air Quantity Calculated / m3 tank volume 1.40 Sm3 hr/m3 vol.approx. air temp. at 73.46 Deg C
Project Management Consortium-Environment Rev.-0 date- 26-05-12 Page 10 of 15
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Mathematical Modeling of STP M/s. Tuscan City, Kundli, Sonepat, Haryana,.
Document No. MM/STP/D076/12-13
blower outletMotor Energy consumption 2.34 kWhrenergy at blower efficiency 3.8 Wh/cm/100mbarStandard Aeration Capacity 3.70 kg O2/kWhrActual Aeration capacity 2.10 kg O2/kWhr
7.1 AERATION TANK:Suggested tank as per site
Size: 3 m x 6.0 m x 5 m (SWD)
7.2 expected BOD load at outlet will be 20 mg/l.
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Mathematical Modeling of STP M/s. Tuscan City, Kundli, Sonepat, Haryana,.
Document No. MM/STP/D076/12-13
8.0 DESIGN OF SECONDARY SETTLING TANK (TUBE SETTLER)
SEDIMENTATION TANK DIMENSIONINGFLOW THROUGH TUBE SETTLER CUM/HR; Q 22.91
SEDIMENTATION VELOCITY OF SETTLABLE SOLIDS; VS 0.5
TUBE HEIGHT 0.5 M
FACTOR OF SAFETY; FS 1
SEDIMENTATION AREA REQUIRED ; AS45.82967 SQ. M
SETTLING AREA AT 55 14 SQ. M / CUM
VOLUME OF TUBE DECK REQUIRED3.273548 CUM
PLAN AREA OF CLARIFIER6.547095
PROVIDED PLAN AREA OF MEDIA2.558729 X 2.558729
OVERALL SURFACE LOADING RATE 3.5CUM / SQM / HR
QUANTITY OF MEDIA
3.273548
WEIR LOADING RATE 8.95
CUM/M/DAY
QUANTITY OF MEDIA WITH ANGLE CORRECTION 3.04 CUM
Project Management Consortium-Environment Rev.-0 date- 26-05-12 Page 12 of 15
Developed By Approved By
Mathematical Modeling of STP M/s. Tuscan City, Kundli, Sonepat, Haryana,.
Document No. MM/STP/D076/12-13
9.0 SLUDGE DISPOSAL:
Since land is constrain in designing the STP, it is recommended to have Filter press
based sludge thickening system. Sludge cake will be used for horticulture purposes in
Tuscan City campus.
10.0TREATED WASTEWATER DISPOSAL (BY OZONE):
As discharge rate of treated water will be 22 Kl per hr, thus a 2 hour storage should be
provided i.e. 44 KL, at the site. This water will be sent to horticulture purposes after
treating with on line Ozonator, Pumping capacity of 15 KL/ hr will provide 3 hr reaction
time.
11. SUMMARY OF MATHEMATICAL MODELING
Thus, if above system is operated as per above mentioned operating conditions/ operating
parameter, it is expected that effluent water quality will meet the criteria for discharge over
land or into water body as stipulated by HSPCB for overland discharge/ disposal to sewer
& Horticultural purposes.
Dinkar Saxena,
Chartered Engineer (India), M/128465/1M. Sc., M.I.E., C. Eng., F.I.P.H.E., PGDM, MASHRAEEnvironment Management System AuditorSocial accountability Auditor (SA 1462 Dtd:04-26-2006)
Project Management Consortium-Environment Rev.-0 date- 26-05-12 Page 13 of 15
Developed By Approved By
Mathematical Modeling of STP M/s. Tuscan City, Kundli, Sonepat, Haryana,.
Document No. MM/STP/D076/12-13
Notes:-
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Developed By Approved By
Mathematical Modeling of STP M/s. Tuscan City, Kundli, Sonepat, Haryana,.
Document No. MM/STP/D076/12-13
Notes
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