Haiderpur Water Treatment Plant

HAIDERPUR WATER TREATMENT PLANT

ROHINI

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

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.

Plant Capacity and Supply Area Coverage for Haiderpur Water Treatment Plant is as follows:

Haiderpur Ist 100 MGD:-Capacity: -> 100 MGDCommissioned: -> 1973/79Optimised Production: -> 100 MGDRaw Water: -> 10 pumps of 22 MGD eachPre-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

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 typeAir blower:-> 60 HP

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

1. Feed Channel From WJC Length: 100 ft Width: 12ft-6inchHeight 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

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-6inch66ft inner dia SWD 17 ft 7 inch

Detention Period Flocculating Chamber - 20 min.Clarifier - 2.5 hrs.

Surface loading 750 gallons/ sq ft/ day

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

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)

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

Water Treatment Plants 13

Conventional Surface Water Treatment

Screening

Coagulation

Flocculation

Sedimentation

Filtration

Disinfection

Storage

Distribution

Raw water

AlumPolymers

Cl2

sludge

sludge

sludge


ScreeningRemoves large solids

logsbranchesragsfish

Simple processmay incorporate a mechanized trash removal system

Protects pumps and pipes in Water Treatment Plants


CoagulationSmall 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 coagulationwe 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 removedprocess involves addition of

chemical (e.g. alum) rapid mixing to dissolve the

chemicaldistribute it evenly throughout

water


CoagulantsAluminum Sulfate

Al2(SO4)3

Ferrous Sulfate FeSO4

Ferric Sulfate Fe2(SO4)3

Ferric Chloride FeCl3Lime 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 forms2. Economical 3. Effective over wide

range of pH4. Produces less sludges5. Less harmful for

environment6. Fast


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.


Sedimentationwater flows to a tank called a

sedimentation basingravity causes the flocs to settle

to the bottomLarge 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


Raw water

Coagulation

Aeration

Flocculation

Sedimentation Tank


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


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


DistributionPumping 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


Serial No. Water Quality ParameterPHYSICAL PARAMETERS

1 Appearance2 Color3 Odor4 Taste5 Temperature6 Turbidity

CHEMICAL PARAMETERS7 pH8 Alkalinity9 Hardness as CaCO3

10 Electrical Conductivity11 Sulphate12 Calcium13 Magnesium14 Total Dissolved Solids15 Chlorides16 Residual Chlorine17 Nitrate as NO3

-

18 Nitrite as NO2-

BACTERIOLOGICAL PARAMETERS19 Total Coliform Count20 Fecal Coliform Count

TOXIC SUBSTANCES21 Arsenic as As +3/+5

22 Cyanide as CN-

Haiderpur Water Treatment Plant

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