The Haiderpur Water Treatment Plant in Delhi is the largest water treatment plant in Asia, with a capacity of 200 MGD. It draws raw water from two sources - the Western Jamuna Canal and Bhakra Storage. The plant has two independent treatment plants, each with a capacity of 100 MGD. The treatment process includes coagulation, flocculation, sedimentation, filtration, and disinfection to produce clean drinking water for over 18 lakh people in areas of northwest Delhi.

2. Haiderpur Water Treatment plant is the single largest
plant in Asia with a capacity of 200 MGD. It is located in
Western Delhi on the outer Ring Road near Prashant
Vihar, Rohini Sector 15 on the bank of Western Jamuna
Canal originating from Tajewala Head Works Haryana.
The plant is about 5km from GTKarnal Bypass and 4
km from Madhuban Chowk. It has two independent
treatment plants of 100 MGD each.
The treatment flow scheme is same for both. A common
laboratory has been provided in the waterworks.
Haiderpur Water Treatment plant

3. Western Jamuna Canal (WJC): - It originates
from Tajewala Head Works, upstream Yamuna
Nagar and then passes through Karnal, Munak,
Panipat, Khubru, Kakroi and Bawana to Haiderpur
Water Works.
Bhakra Storage: Delhi Jal Board receives water
from Bhakra Storage through Bhakra Nangal
canal which joins WJC near Karnal and carries fresh
water for Delhi Water Supply.
Raw water is drawn from two sources, viz. the
Western Jamuna Canal (WJC) and the Bhakra
Storage.

4. Plant Capacity and Supply Area Coverage for
Haiderpur Water Treatment Plant is as follows
 Haiderpur Ist 100 MGD:-
Capacity: -> 100 MGD
Commissioned: -> 1973/79
Optimised Production: -> 100 MGD
Raw Water: -> 10 pumps of 22 MGD each
Pre-chlorination :> 40 kg / hr.
Filter House (2 Nos.): each of 50 MGD capacity
Total 40 Nos. rapid sand filters of size
10.3m X 9.5m X 3m
(2.5 MGD) each

5. Clariflocculator at Haiderpur Water Treatment Plant
Clarifloculators (8 Nos.): -> each of 12.5 MGD
(51.5 m dia X 4m depth)
Backwash Pump :-> 125 HP centrifugal type
Air blower:-> 60 HP

6. Population served:-> 18 Lakh approx.
Area served:-> Pitampura, Shalimar bagh,
Saraswati vihar, Paschim
vihar, Raja Garden, Jawala
Heri ,Ramesh nagar,North
West Delhi.

7. 1. Feed Channel From WJC Length: 100 ft Width: 12ft-6inch
Height 7ft
2. Raw Water Pump House
a. Silt-Chamber 145ft x 20 ft
b. Sump 152ft x 20ft
c. Pump House with ANNEXE 80 x 16
d. Raw water pumps 10 Nos.
e. Capacity 110 kw 22MGD each
f. Raw water main 4 Nos.---1100 mm dia Length-100ft

8. 3. Pre-treatment
a. Main inlet sump_ (2 Nos.) 16ft x 16ft
b. Flash mixer------- (8 Nos.) 8ft x 8ft
Detention Period 30 sec
c. Clariflocculators 8 Nos.
Capacity 12.5 MGD
Size 160ft dia SWD 12ft-6inch
66ft inner dia SWD 17 ft 7 inch
Detention Period Flocculating Chamber - 20 min.
Clarifier - 2.5 hrs.
Surface loading 750 gallons/ sq ft/ day

9. 4. Chemical House
A. Area 500 sq ft
B. Maximum Alum Dose 60 ppm
C. Capacity of Each tank (11 ft x 11ft x 6 ft) 4 hrs. @ 5% solution
D. 12 Nos. Tanks 4500 gallons
5. Alum Godown 600 MT each

10. 6. Filtration Plant
Filter House 2 Nos. (348 x 100 ft)
Number of Filters 25 x 2 (26 x 35 ft each)
Capacity of Filters 2 MGD each
Rate of Back Washing 10 gal / sq ft / min
Rate of Air Sourcing 2 cft/min
Working Area of Each Filter 836 sq ft
Rate of Filteration 100 gal / sq ft / hour
Blower in each Plant 3 Nos. (840 cft / min)
Back Washing Pumps 4 Nos. (2800 gal/ min)

11. 7. Filter Sand Media
Fine Sand 1/32 to 1/16 inc = 24 inch
Coarse Sand 1/16 to 1/8 inc = 6 inch
Gravel 1/8 to 1/4 inc = 4 inch
Gravel 1/4 to 1/2 inc = 2 inch
Fine Gravel 1/2 to 1 inc = 2 inch
Coarse gravel 1 to 2 inch = 2 inch
8. Balancing Reservoir
Capacity 2.4 MG each (5 Nos.)
Volume 200 x 200 x 10 ft

13. Conventional Surface Water
Treatment
Screening
Coagulation
Flocculation
Sedimentation
Filtration
Disinfection
Storage
Distribution
Raw water
Alum
Polymers
Cl2
sludge
sludge
sludge
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14. Screening
 Removes large solids
logs
branches
rags
fish
 Simple process
may incorporate a mechanized trash removal system
 Protects pumps and pipes in Water Treatment
Plants
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15. Coagulation
 Small particles are not
removed efficiently by
sedimentation because they
settle too slowly
 they may also pass through
filters
 easier to remove if they are
clumped together
 Coagulated to form larger
particles, but they don't
because they have a negative
charge
 repel each other (like two
north poles of a magnet)
 In coagulation
 we add a chemical such
as alum which produces
positive charges to neutralize
the negative charges on the
particles
 particles can stick together
 forming larger particles
 more easily removed
 process involves addition of
chemical (e.g. alum)
 rapid mixing to dissolve the
chemical
 distribute it evenly
throughout water
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16. Coagulants
 Aluminum Sulfate
Al2(SO4)3
 Ferrous Sulfate FeSO4
 Ferric Sulfate Fe2(SO4)3
 Ferric Chloride FeCl3
 Lime Ca(OH)2
Aluminum salts are
cheaper but iron salts are
more effective over wider
pH range
Factors for choosing a
coagulant?
1. Easily available in all
dry and liquid forms
2. Economical
3. Effective over wide
range of pH
4. Produces less sludges
5. Less harmful for
environment
6. Fast
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17. Flocculation
 Now the particles have a neutral
charge
 can stick together
 The water flows into a tank with
paddles that provide slow mixing
 bring the small particles
together to form larger particles
called flocs
 Mixing is done quite slowly and
gently in the flocculation step
 If the mixing is too fast, the
flocs will break apart into small
particles that are difficult to
remove by sedimentation or
filtration.
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18. Sedimentation
 water flows to a tank called a
sedimentation basin
 gravity causes the flocs to settle
to the bottom
 Large particles settle more
rapidly than small particles
 It would take a very long time
for all particles to settle out and
that would mean we would need a
very large sedimentation basin.
 So the clarified water, with most
of the particles removed, moves
on to the filtration step where
the finer particles are removed
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19. Raw water
Coagulation
Aeration
Flocculation
Sedimentation Tank
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20. Filtration
 The filtration apparatus is a concrete
box which contains sand (which does
the filtering), gravel (which keeps
the sand from getting out) and
underdrain (where the filtered water
exits)
 After the filter is operated for a
while, the sand becomes clogged with
particles and must be backwashed
 Flow through the filter is reversed
and the sand and particles are
suspended
 The particles are lighter than the
sand, so they rise up and are flushed
from the system. When backwashing
is complete, the sand settles down
onto the gravel, flow is reversed and
the process begins again
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21. Disinfection
 With particles removed, it only
remains to
provide disinfection, so that no
pathogens remain in the water
 Protozoan pathogens are large in
size and have been removed with
other particles
 Bacteria and viruses are now
destroyed by addition of
a disinfectant
Chlorination
 Enough chlorine is added so that
some remains to go out in the
water distribution system,
protecting the public once the
water leaves the plant
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22. Distribution
 Pumping of the clean
water produced at the
treatment plant to the
community is
called distribution
 This can be done
directly or by first
pumping the water
to reservoirs or water
storage tanks
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23. Serial No. Water Quality Parameter
PHYSICAL PARAMETERS
1 Appearance
2 Color
3 Odor
4 Taste
5 Temperature
6 Turbidity
CHEMICAL PARAMETERS
7 pH
8 Alkalinity
9 Hardness as CaCO3
10 Electrical Conductivity
11 Sulphate
12 Calcium
13 Magnesium
14 Total Dissolved Solids
15 Chlorides
16 Residual Chlorine
17 Nitrate as NO3
-
18 Nitrite as NO2
-
BACTERIOLOGICAL PARAMETERS
19 Total Coliform Count
20 Fecal Coliform Count
TOXIC SUBSTANCES
21 Arsenic as As +3/+5
22 Cyanide as CN-
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