watwer test report.pptx

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1. HAIDERPUR WATER TREATMENT PLANT ROHINI

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 I st 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

12. Conventional Surface Water Treatment Screening Coagulation Flocculation Sedimentation Filtration Disinfection Storage Distribution Raw water Alum Polymers Cl 2 sludge sludge sludge Water Treatment Plants 13

13. 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 Water Treatment Plants 14

14. 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 Water Treatment Plants 15

15. Coagulants Aluminum Sulfate Al 2 (SO 4 ) 3 Ferrous Sulfate FeSO 4 Ferric Sulfate Fe 2 (SO 4 ) 3 Ferric Chloride FeCl 3 Lime Ca (OH) 2 Aluminum salts are cheaper but iron salts are more effective over wider pH range Factors for choosing a coagulant ? Easily available in all dry and liquid forms Economical Effective over wide range of pH Produces less sludges Less harmful for environment Fast Water Treatment Plants 16

16. 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 . Water Treatment Plants 17

17. 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 Water Treatment Plants 18

18. Raw water Coagulation Aeration Flocculation Sedimentation Tank Water Treatment Plants 19

19. 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 Water Treatment Plants 20

20. 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 Water Treatment Plants 21

21. 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 Water Treatment Plants 22

22. 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 CaCO 3 10 Electrical Conductivity 11 Sulphate 12 Calcium 13 Magnesium 14 Total Dissolved Solids 15 Chlorides 16 Residual Chlorine 17 Nitrate as NO 3 - 18 Nitrite as NO 2 - Bacteriological Parameters 19 Total Coliform Count 20 Fecal Coliform Count Toxic Substances 21 Arsenic as As +3/+5 22 Cyanide as CN - Water Treatment Plants 23