Consultancy for New WTP, Recycling Plant Augmentation and Automation of Existing WTP at Wadgaon, Pune
Nagaur Na gaur Lif t Water Supply Project 250 MLD CAPACITY WTP AT NOKHA DAIYYA (300 MLD Ult im ate) Design Calculations for Main Units 1 De Design sign Considera Considerations tions Desired Output Internal loss after considering recovery Raw water Input W orking Hours Average Flow Rate (Normal) Overload flow for hydraulic design of inlet works Overload flow for hydraulic design rest of the plant Inlet Works Average Flow Rate Inlet Works Average Flow Rate (Overload) n et wor wor s vera verage ge ow ate ate (Normal) Inlet works Average Flow Rate (Overload) 2 Treatme Treatment nt Plant Plant Units 2.1 Inle 2.1 Inlett Chamber Chamber Design Nominal Flow Desigin input flow Inlet Works Average Flow Rate n et or s vera verage ge ow ow ate ate (Overload) Inlet works Average Flow Rate (Normal) n et wor wor s vera verage ge ow ate ate (Overload) Design flow Present normal No of units Hydraulic Retention Time Volume Depth Area Diameter Check for HRT at Design Ultimate Overload Condition
Q(out)
250000.00 m /day
IL @ 3 % Q(in) = Q(out) + IL
7500.00 257500.00 22.00 11704.55
t Q(avg)
3
m /day m /day Hours/day m /Ho /Hour
30.00 % 25.00 % 3 11704.55 m /hour Q(OL) 30 % over nornmal flow
3
15215.91 m /hour 3
Q(avg)
3.25 m /Sec
Q(OL) 30 % over nornmal flow
4.23 m /Sec
3
3
300000.00 m /day 3 309000.00 m /day 3 14045.45 m /hour Q(OL) 30 % over nornmal flow
3
18259.09 m /hour 3
Q(avg)
3.90 m /Sec
Q(OL) 30 % over nornmal flow
5.07 m /Sec
N HRT V = Q(avg) X HRT D A = V/ D
3
3.25 1.00 60.00 234.09 5.15 45.45 7.61
3
m /Sec No Sec @ avg flow m m 2 m m
46.15 Sec
Dimensions Adopted Di am et er
STC
7.61 m
1 Of 14
Consultancy for New WTP, Recycling Plant Augmentation and Automation of Existing WTP at Wadgaon, Pune
Nagaur Lif t Water Supply Project 250 MLD CAPACITY WTP AT NOKHA DAIYYA (300 MLD Ult im ate) Design Calculations for Main Units Depth 5.15 m Free Board 0.50 m Construction RCC Protection Food Grade Epoxy on all internal
2.3 Inlet Channel No of Units Design Flow Normal Ultimate Design Flow Overload Ultimate Design flow Present normal Flow present Overload Velocity rea requre or t mate condition
N 250 + 50 MLD Q(avg)
1.00 3.90 5.07 3.25
No 3 m /Sec 3 m /Sec m /Sec
4.23 m /Sec 0.80 m/sec
Q(OL) V orma
Width Depth Check for Velocity at Ultimate overload condition Check for Velocity at present overload condition
A= Q(Uliti_avg)/V W D
4.88 m 2.50 m 1.95 m
2
1.04 m/sec 0.87 m/sec
Dimensions Adopted Length Width Liquid Depth FB 2.4 Parshall Flume Approach Channel Width Design flow Max Design flow min
5.00 2.50 1.95 0.50
2.50 m 5.07 m /Sec 3.25 m /Sec
W Q(OL) Q(avg)
Throat Width
1.5 m 3/2
Head at max. flow condition Q = 2.264W H Head at min. flow condition Headd Loss at Max Flow Head Loss at Min flow Water Level D/s of Flume at Max Flow Water Depth at D/s of Flume at Min Flow 2.5 Distribution Box No of Inlet No of Outlet HRT in the inlet box
STC
m m m m
1.307 m 0.971 m 0.784 m 0.583 m 0.523 m 0.261 m
1 No 6 No 60 Sec
2 Of 14
Consultancy for New WTP, Recycling Plant Augmentation and Automation of Existing WTP at Wadgaon, Pune
Nagaur Lif t Water Supply Project 250 MLD CAPACITY WTP AT NOKHA DAIYYA (300 MLD Ult im ate) Design Calculations for Main Units Inflow Vol Weir length for distribution Maximum Flow through each weir Rise Over Weir No of Outlet on one side Length of Distribution Box Depth Area Width 2.4 Flash Mixer No of Units Flow (avg)
3.90 234.09 5.00 0.85 0.2 3 15 3.5 66.88 4.46
6.00 m 3.90 m /sec 0.65 m /Sec
N Q(avg)
Flow through each unit HRT Volume of each tank Liquid depth Area of cross section Length Width
3
m /Sec 3 m m 3 m /Sec m No m m 2 m
Q(unit)=Q(avg)/N t V A L W
60.00 39.02 3.25 12.00 3.46 3.46
sec 3 m m 2 m m m
3.50 3.50 3.25 0.50 39.81
m m m m 3 m
Dimensions Adopted Length Width Liquid Depth Free Board Tank Volum e Construction
RCC
2.5 Pipe Connection From Flash Mixer to Flocculation Cum Settli ng Tank No of Connections Q(avg) Flow Normal Flow Overload Velocity Area required for overload condition Diameter of Pipe Pipe Size Provided Check Velocity for Overload condition 2.6 Flocculation cum settling Tank (Conventional Design) No Of Units N Q(avg) Design Flow Flow through each tank (Avg) Inner diameter of Central Coloum
STC
6.00 No 3.90 m /Sec 5.07 0.90 0.94 1.09 1000.00
3
m /Sec m/sec 2 m m mm
6 All Working 309000.00 m /day 3
51500.00 m /day 1.00 m
3 Of 14
Consultancy for New WTP, Recycling Plant Augmentation and Automation of Existing WTP at Wadgaon, Pune
Nagaur Lif t Water Supply Project 250 MLD CAPACITY WTP AT NOKHA DAIYYA (300 MLD Ult im ate) Design Calculations for Main Units Outer Dia of Central Coloum HRT in flocculation tank Volume of flocculation Zone Add for Vol occupied by central coloum Corrected Volume of Flocculation Zone Depth of flocculation Zone Area of flocculation Zone Inner Diameter of Flocculation Zone Outer Diameter of Flocculation Zone Outer surface Area of Flocculation Zone Surface Loading Rate in clarifier
m min 3 m /day 3 m /day 3 m m 2 m m m 2 m m /m /day
1783.18 m 47.66 m
Surface Area Required Diameter Of Unit Detention Time Volume Required Depth required
1.30 25.00 894.10 3.98 898.08 3.00 299.36 19.53 19.93 311.75 35.00
HRT SWD= V / SA
2
2.50 Hours at Avg flow 3 5364.58 m 3.01 m
Domensions Adopted Flocculation Zone Diameter Depth Overall Clarifier & Flocculator Diameter SWD FB Check for Weir loading Length of weir Loading Launder Dimension s Flow Velocity Area Depth Width 2.7 Sludge Outlets from Clariflocculator No of Connections Discharge Volume Discharge Volume /outlet Discharge Duration Flow rate Velocity Area required
STC
19.53 m 3.00 m 48.00 m 3.01 m 0.50 m
150.72 m 3 341.69 m /m/day 3
0.33 0.90 0.36 0.50 0.72
m /Sec m/sec 2 m M M
6.00 7725.00 1287.50 150.00 0.14 1.50 0.10
No 3 m /day 3 m /day Min 3 m /Sec m/sec 2 m
4 Of 14
Consultancy for New WTP, Recycling Plant Augmentation and Automation of Existing WTP at Wadgaon, Pune
Nagaur Lif t Water Supply Project 250 MLD CAPACITY WTP AT NOKHA DAIYYA (300 MLD Ult im ate) Design Calculations for Main Units 0.35 m 350.00 mm
Diameter of Pipe Pipe Size Provided
2.8 Telescopic Device for constant discharge 250.00 mm
Diameter 2.1 Channel from clarifloccultor to Common Channel No of Units Q(avg) Flow Normal
2.00 No 1.95 m /Sec 3
Flow Overload Velocity Area required for overload condition Width Depth
2.44 1.00 2.44 1.60 1.52
m /Sec m/sec 2 m m m
2.11 Filter Inlet Channel No of Units Flow Normal Flow Overload Velocity Area required for overload condition Width Depth
2.00 1.95 2.34 1.00 1.17 0.60 1.95
No 3 m /Sec 3 m /Sec m/sec 2 m m m
2.12 Filtration units No of Filter House Flow to Each No of Total Filter Box No of Working Unit at a time Working time for each filter Design Flow (Average) Design Flow Per Filter (avg) Filtration Rate Area required short side of filter Long Side Washwater Gutter width Flow when one filter is out Filtration rate Overall fil ter house diamnsions Width
STC
WT Q(desavg) = Q(avg)/22 q(avg) = Q(desavg)/ No of Filter FR FA L/B Width Length
1 14045 24 22 22.00 14045.45 638.43 7.50 85.12 1.50 7.53 11.30 0.90 668.83 7.86
Building 3 m /hour m m Hours 3 m /hour 3 m /hour 3 2 m /m /day 2 m m m m m 3 m /hour 3 2 m /m /day
8.43 m
5 Of 14
Consultancy for New WTP, Recycling Plant Augmentation and Automation of Existing WTP at Wadgaon, Pune
Nagaur Lif t Water Supply Project 250 MLD CAPACITY WTP AT NOKHA DAIYYA (300 MLD Ult im ate) Design Calculations for Main Units Length Ht
11.30 m 3.50 m
Two Filter Houses, each having Two ro ws of Eight fil ters each and midd le operating gallery consi Dimensions of Filter House No of Filters in each filt er house 24.00 No Over all length 107.40 m Overall Wid th 33.30 m Operating gallery 7.50 m 2.13 Sizes of the Ports a Filter Inlet No of Working Inlets Flow Normal Flow Overload Velocity Area required for overload condition Diameter of Pipe Inlet Size Provided
22.00 0.18 0.21 1.00 0.21 0.52 500
No 3 m /Sec 3 m /Sec m/sec 2 m m mm
b Filter Water Outlet No of Working Outlets Flow Normal Flow Overload Velocity Area required for overload condition Diameter of Opening Inlet Size Provided
22.00 0.18 0.21 1.00 0.21 0.52 500.00
No 3 m /Sec 3 m /Sec m/sec 2 m m mm
c Back Wash Water Inlet Back Wash Rate Area of Filter Bed No of Inlets in each Filter Wash Water Flow through each inlet Wash Water Flow through each inlet Velocity Area required Diameter of Pipe Inlet Size Provided
30.00 85.12 1.00 2553.72 0.71 2.50 0.28 0.60 600.00
d Wash Water Outlet No of Outlets Flow Normal Velocity Area required
STC
1.00 0.71 2.50 0.28
3
2
m /m /hour 2 m m 3 m /hour 3 m /Sec m/sec Sq. M m mm
No 3 m /Sec m/sec 2 m
6 Of 14
Consultancy for New WTP, Recycling Plant Augmentation and Automation of Existing WTP at Wadgaon, Pune
Nagaur Lif t Water Supply Project 250 MLD CAPACITY WTP AT NOKHA DAIYYA (300 MLD Ult im ate) Design Calculations for Main Units 0.60 m 600.00 mm
Diameter of Opening Outlet Size Provided 2.14 Filter Outlet Channel No of Units Flow Normal Flow Overload Flow Velocity Area required for overload condition Width Depth FB
1.00 14045.45 16854.55 4.68 1.00 4.68 2.00 2.34 0.30
No 3 m /hour 3 m /hour 3 m /Sec m/sec 2 m m m m
2.15 Washwater Outlet Channel No of Units Flow Normal Velocity Area required for overload condition Width Depth Free Board
1.00 0.71 1.00 0.71 0.80 0.89 0.50
No 3 m /hour m/sec 2 m m m m
2.16 Pipe Connection from Filter Outlet Channel to CCT (Alternative to Channel) No of Pipes 1.00 No Q(avg) Flow Normal 3.90 m /Sec Flow Overload Velocity Area required for overload condition Dimeter of pipe Provide
2.17 Chlorine Contact Tank No of Units Compartments Design Flow HRT Volume Depth Surface Area Width Partition Wall Thickness No of walls Corrected Width
STC
N n Q(avg) T V=(Q/60) X HRT D A = V/D Wt NWALLS W =A
4.88 1.20 4.06 2.28 2200.00
1 4 14045.45 20.00 4681.82 4.00 1170.45 42.00 0.25 3.00 43.00
3
m /Sec m/sec 2 m m mm
No No m /hour m cu.m m 2 m m m No m
7 Of 14
Consultancy for New WTP, Recycling Plant Augmentation and Automation of Existing WTP at Wadgaon, Pune
Nagaur Lif t Water Supply Project 250 MLD CAPACITY WTP AT NOKHA DAIYYA (300 MLD Ult im ate) Design Calculations for Main Units Length Free Board Overall Height Size of Each Compartment Width Length Dimensions Adopted No of Compartments Width Length Liquid Depth Free Board Construction 3 Equipment 3.1 Filter backwash Pumps Back wash Water requirement Backwash rate Backwash Flow Backwash Duration Water Consumed /back wash No of Back wash /hour Overhead Tank Capacity No of Tank Capacity of Each Provide Punps for filling backwash Tank Working Standby Pump Capacity Head 3.2 Air Blowers No of Units/filter House No of Working units Total No Air Scour Rate Air rate Area of filter A Air Requirement Airqty =Air Rate x Area discharge head Capacity of each blo wer to be pro vid e 3.3 Chlorinators for pre chlorinations Chlorine Dose = Flow =
STC
27.87 m 0.50 m 4.50 m 9.75 m 27.87 m 4.00 9.75 27.87 4.00 0.50
No m m m m
RCC
3
2
25.00 2128.10 10.00 354.68 1.00 354.68 1.00 354.68 465.00 2.00 1.00 1.00 930.00 15.00
m /m /hour 3 m /hour Min 3 m Provision 3 m No 3 m 3 m No No No 3 m /hour m
3.00 2.00 3.00 55.00 85.12 4681.82 4.50
No No Two Working 3 2 m /m /hour 2 m 3 m /hour MWC 3
2340.91 m /hour
2 mg/l 14045.5 m3/h
8 Of 14
Consultancy for New WTP, Recycling Plant Augmentation and Automation of Existing WTP at Wadgaon, Pune
Nagaur Lif t Water Supply Project 250 MLD CAPACITY WTP AT NOKHA DAIYYA (300 MLD Ult im ate) Design Calculations for Main Units = Maximum Chlorine Dosing rate Cosider capacity of each chlorinator as = So No of units, Working = standby = Maximum withdrawal capacity of each tonner = Tonner for each Chorinator = Total tonners required including standby = Total tonners required including standby with changeover = 3.4 Chlorinators for post chlorinations Chlorine Dose = Flow Maximum Chlorine Dosing rate Cosider capacity of each chlorinator as So No of units, Working (Cosidering 50 % standby) Maximum withdrawal capacity of each tonner Tonner for each Chorinator Total tonners required including standby Total tonners required including standby with changeover
= =
28.1 kg/h 30.00 kg/h 1.0 No 1.0 No kg/h 2 No 4 No
8.00 No
2 mg/l 3 14045.5 m /h 28.1 kg/h 15.00 kg/h
= = =
2 No 1 No
= =
kg/h 2 No
=
6 No
=
12.00 No
3.5 Chlorinators fo r Water Recovery and Recycling Chlorine Dose = Flow = = Maximum Chlorine Dosing rate Cosider capacity of each = chlorinator as
5.0 625.0 3.1
mg/l 3 m /h kg/h
4.0
kg/h
So No of units, Working standby Maximum withdrawal capacity of each tonner Tonner for each Chorinator
STC
= =
1 1
No No
= =
4 1
kg/h nos
9 Of 14
Consultancy for New WTP, Recycling Plant Augmentation and Automation of Existing WTP at Wadgaon, Pune
Nagaur Lif t Water Supply Project 250 MLD CAPACITY WTP AT NOKHA DAIYYA (300 MLD Ult im ate) Design Calculations for Main Units Total tonners required including standby = Maximum withdrawal capacity of each tonner = Tonner for each Chorinator = Total tonners required including standby = 3.6 Total chlorine requirement Total chlorine requirement Capacity per cylinder Nos. of cylinders Nos. of cylinders
= = = = =
2
No
7 1
kg/h nos
2
59.3 1423.4 900 1.6 33
kg/h kg/d kg per day per 21 days
4 Chlorine Drum Store And Chlorinator Room 4.1 Store No of Drums Connected for Pre Chlorination No of Drums Connected for Post Chlorination
4.00 No 4.00 No
Extra Filled Drum Extra Empty Drum Total Drums Provide space for No of Rows
2.00 No 13.00 No 9.00 No 32.00 No 36.00 No 9.00 No
Width Length
15.36 m 15.78 m
No of Drums Connected for Dirty backwash treatment
4.2 Chlorinator Room Width Length 4.3 Drum Pit Length Width Depth
15.78 m 7.00 m
2.00 m 2.00 m 2.00 m
5 Dirty Backwash Water Recovery System 5.1 Sump for clariflocculator Sludge Wastewater from clarifier Discharge frequency No of discharges
STC
3
7725.00 m /day 3.00 Hours 8.00 per day
10 Of 14
Consultancy for New WTP, Recycling Plant Augmentation and Automation of Existing WTP at Wadgaon, Pune
Nagaur Lif t Water Supply Project 250 MLD CAPACITY WTP AT NOKHA DAIYYA (300 MLD Ult im ate) Design Calculations for Main Units Duration of each discharge Total discharge time Flow rate Retention time in collection tank Volume of the tank Depth of tank Area Length Width
10.00 80.00 1.61 1.00 965.63 3.00 321.88 25.37 12.69
Min min 3 m /Sec discharge 3 m m 2 m m m
5.2 Thickener for clariflocculator Sludge Plant Capacity Flow for Phase 1 SS Concentration in raw effluent Total Solid Load because of SS Alum Consumption as Al2O3 Sludge Formed Total Solid Load Solid separated in clariflocculator Solids going to thickener Design Flow Rate for Thickener Solid Loading Rate Surface Loading Rate Area required for Soild Loading Criteria Area required for Surface Loading Criteria Adopted Area Diameter Outlet Sludge Conc Thickened Sludge Volume
309000.00 14045.45 15.00 5056.36 772.50 1605.59 6661.95 99.00 6328.85 321.88 40.00 40.00 158.22 193.13 193.13 15.68 5.00 154.50
Cu. M. /day Cu. M. /hr mg/l kg/day kg/day kg/day kg/day % Kg/day Cu. M. /hr 2 kg/m /day 3 2 m /m /day 2 m 2 m 2 m m % 3 m /day
5.3 Sump for filter backwash Filter Back wash Duration Total Flow Back wash Flow for 2 filter Volume required Depth Area Width Length Dimensions A dopted
0.71 10.00 425.62 851.24 851.24 3.20 266.01 23.06 11.53 Length Width
STC
3
m /Sec Min 3 m 3 m 3 m m 3 m /hour m m
25.37 m 12.69 m
11 Of 14
Consultancy for New WTP, Recycling Plant Augmentation and Automation of Existing WTP at Wadgaon, Pune
Nagaur Lif t Water Supply Project 250 MLD CAPACITY WTP AT NOKHA DAIYYA (300 MLD Ult im ate) Design Calculations for Main Units F. B.
0.50 m
5.4 Clarifier for Filter Backwash recycling Flow Surface Loading Rate Area required Diameter SWD
425.62 10214.88 100.00 102.15 11.41 2.00
Cu.M/hour Cu. M/day 2 kg/m /day 2 m m m
Pipe Size from Dirty Back wash Transfer Pumps to Clarifier Flow Velocity Area required Diameter of Header Pipe Provide Pipe dia
3
425.62 1.50 283.75 19.01 500.00
m /Sec m/sec 2 m m MM
154.50 15.00 2317.50 0.80 2896.88 14.00 206.92 17.00 12.17
m /day Days 3 m m 2 m
5.5 Sludge Drying Beds Volume of Thickened Sludge Drying Cycle Volume for 11 days Application depth Area required No of beds Area of each Length
Dimensions adopted Langth Width Depth
6 Calculations for Chemical Dosing 6.1 Dosing Tanks 250+50MLD+losses 9 MLD Design Flow Normal Ultimate Dose of Aluminium Sulphate as Al2O3 (Average) Cosumption As Al2O3
STC
3
m
2
17.00 m 12.00 m 1.70 m
309.00 MLD 309000.00 m3/day 2.50 mg/l 772.5 Kg/day
12 Of 14
Consultancy for New WTP, Recycling Plant Augmentation and Automation of Existing WTP at Wadgaon, Pune
Nagaur Lif t Water Supply Project 250 MLD CAPACITY WTP AT NOKHA DAIYYA (300 MLD Ult im ate) Design Calculations for Main Units Al2O3 Contents in commercial product Quantity of commercial product required Alum Consumption Solution Tank Capacity Cosumptiion of Alum in 8 hours Solution Strength Solution Volume for 8 hours No of Working Tanks Volume of Each No of Standby tank Volume of Each Depth Area Required Width Langth
17.0 % 4544.1 206.55 8.00 1652.41 5 33048.13 1 33.05 2 33.05 2.50 13.22 3.64 3.64
Kg/day Kg/hour Hours Kg % W /V lit No Cu. M No m m
3
m m m
2
Dimension Adopted Length width Depth FB 6.2 Space Requirement For stori ng Alum Flow Dose of Aluminium Sulphate as Al2O3 (Average) Cosumption As Al2O3 Al2O3 Contents in commercial product Quantity of commercial product required For 45 days Wt of brick No of Bricks Vol of Brick Volume Required Ht of Stack Area required Acess Area Area required Void space Correct Area for Void Space
Provide
3.64 3.64 2.50 0.50
m m m m
309000.0 m3/day 2.5 PPM 772.5 Kg/day 17.0 % 4544.1 204485.3 20.0 10224.3 0.0 184.0 1.8 102.2 25.0 127.8 15.0 147.0
Kg/day kg Kg No 3
m 3 m m 2
m %
2
m % m
2
150.0 m2
Calculatio n For PAC 6.3 PAC Calculatio n for Storage
STC
13 Of 14
Consultancy for New WTP, Recycling Plant Augmentation and Automation of Existing WTP at Wadgaon, Pune
Nagaur Lif t Water Supply Project 250 MLD CAPACITY WTP AT NOKHA DAIYYA (300 MLD Ult im ate) Design Calculations for Main Units Treatment plant capacity (ultimate) Dose of PAC as Al2O3 (Average)
309000.00 m3/day 2.50 mg/l 772.50 Kg/day
Cosumption As Al2O3 Al2O3 Contents in commercial product Consumption in terms of commercial product Spcific Gavity of Solution Cosumption of commercial product on volumetric basis 45 Days requirement
9.00 % 8583.33 Kg/day 1.21 7093.66 Lit/day 319214.88 Lits 319.21 m3 2.00 159.61 m3
No of Storage Tanks Volume of Each Tank Tank Dimensions Depth Area Length Width
2.50 M 63.84 7.99 7.99
6.4 Alternate Design wit h HDPE Tank Capacity of Tanks No of Tanks required Provide
20000.00 Lit 15.96 16.00 Tanks
6.5 Dosing Solution Tank Daily Consumption No of working Tanks No of Standby Tank Volume of Each Tank Say Depth Area Length Width
7093.66 1.00 2.00 7093.66 7500.00 1.50 5.00 2.24 2.24
Lit/day
Lit Lit M m m
Dimension Adopted Length width Depth FB
STC
2.24 2.24 1.50 0.50
m m m m
14 Of 14