WPT Presentation

7/27/2019 WPT Presentation

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PRESENTATIONON

WATER PRE-TREATMENTPLANTPRESENTED BY OSBL TEAM


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SOURCE OF RAW WATER Damodor River.

Pumping Station : We have installed intake well &

pumping station in the river upstream of Barrage,

Pumping station is about 25km from our plant.

Contract for 8.5 MGD ( 1611 M3/hr)


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Raw Water Intake WellSize : 8 Mtr Dia x 19 Mtr depth.Pumps : 3 Nos ( Vertical Centrifugal )Capacity : 1250 M3/Hr.Head : 30 Mtr

RW line : 40 Raw Water line(Thickness-10mm)of approx 25 KM

External Coating -3 layer of Poly Epoxy

Internal Coating: 110 micron Epoxy.


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Water ReservoirCapacity (each) : 1,37,500 M3.(Min 3.5 Days)Qty (Nos) : 02 Nos.

Pump House : Pump Type : Vertical Centrifugal Pump.

Qty (Nos) : 3 Nos ( 2W+1S) Capacity(M3/Hr) : 875 M3/Hr ( Each)

Head (Mtr) : 31.5 Mtr.

Screening at RWR: (Removing large debris - sticks,leaves, rubbish and other large matters) Two Nos SS Mesh in the inlet Channel of sump

Screen size: 150 Mesh and another 300 Mesh.


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Number of stream : 02 Nos

Total Design Feed Flow rate : 1750 M3/Hr.

Capacity of Pre Treatment plant : 1600 M3/Hr.

Water Intake Quality (Typical Analysis)PH-6.8 , TDS-138, Total Hardness-90, CaH-20,

MgH-9.5, SO4-13, Chloride -28.2, COD 5PPM,Colloidal Silica-0.6.


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PRE TREATMENT STEPS Aeration

Chlorination Clarification

Filtration

Removal of hardness( If required).


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Cascade Aerator

Size: 9 mtr dia X 6 Mtr Height

Surface Area: 52.5 M2

No of Steps: 05 Nos (Size= 700 mm width x 200 mm Height)

Purpose :a) Removal of dissolved gases, such as carbon dioxide etc .

b) Increases amount of dissolve Oxygen.

c) Remove volatile organic chemicals.
http://localhost/var/www/apps/conversion/tmp/scratch_10/9017-M-WPT-MES-PU-01Z-A02-001%20GA%20of%20Aeration,%20Flash%20Mixer.pdf


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Soda ash dosing Coagulant dosing Poly Electrolyte dosing

1750 M3 Raw water

Chlorine Dosing

To DM Plant

Fire Water

Cooling water Make up

Service Water

SSAC

Clarified water Transfer Pump

Drinking Water

BLOCK DIAGRAM FOR RAW WATER TREATMENT PLANT

Treated water tank

Activated Carbon

Filter

Clarified

Sludge Sump

Dual

Media

Filter

Clarified

water

storage

tank

Cascade

Aerator

Stilling

Chamber

Elevated Channel

with Parshall flume

Flash

Mixer

Flash

mixer

Channel

Klaritube

settler


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Stilling Chamber

Flow rate: 1750 M3/Hr. Volume: 29.2 M3

Size: 3.6 Mtr x 2.5 Mtr x 3.5 Mts Ht. Detention Time: 1 min.

CHLORINATION Application of chlorination

1. Disinfections2. Control of taste and odors3. Destruction of organic matter4. Colour reduction5. Control of Algae6. Control of Iron, Manganese and Sulphate reducing bacteria

Chlorine Dosing rate: 3-5 PPM Chlorinator Size : 10 kg/hr Chlorine Leakage Handling System - Neutralization pit

& Blower System


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Elevated Channel & Pershall Flume

Unit : 02 Nos ( Both working)

Soda Ash( Sodium Carbonate) Dosing system:Remove non carbonate hardness.

Dosing rate : 10 to 15 PPM if required


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Flash Mixer : In the flash mixer, coagulant chemicals

are added to the water and the water is mixed by amixer. The purpose of this step is to evenlydistribute the chemicals through the water. Afterflash mixing, coagulation occurs.Volume : 14.6 M3

Mixer RPM : 76During coagulation, the coagulant chemicalsneutralize the electrical charges of the fine particlesin the water, allowing the particles to come closertogether and form large particle, called Mini Floc.

Coagulant Dosing rate: 30 PPM Max based onTurbidity (10% Concentration Solution) Poly Electrolyte dosing rate: 1 PPM (0.1%

Concentration) Detention Time: 1Min.


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CLARIFICATIONSTEPS OF CLARIFICATION:

Coagulation Flocculation SedimentationPurpose: The primary purpose of the

coagulation/flocculation process is the removal ofturbidity from the water.

Turbidity before Clarification : 500 NTU ( Design) Turbidity after Clarification :


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Tube

modules

Rakearm

Flocculat

ion Well

Collection

Launders

Flocculators

Raw Water

Sludge

Sludge sliding off

the tube surface

50mm Sq. Rigid

PVC tube 600 mm

long inclined at 550to 600.

Angle of Inclination of the

Tube = 600

Clarified Water


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FLOCCULATION ZONE :Flocculation : Flocculation, a gentle mixing

stage, increases the particle size of microfloc.The microflocs are brought into contact witheach other through the process of slow mixing.Collisions of the microfloc particles cause them

to bond to produce larger Floc for settlement.

Dia of Flocculating Well : 11.2 Volume: 365 M3 Detention Time: 25 Min No of Flocculators : 4 Nos RPM : 11


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SEDIMENTATION ZONE:Sedimentation: A process of settling down ofheavier particles by gravity.

No of Tube Module : 162 Nos for each settler.

Collection trough : 36 nos.

Scrapper Mechanism Settled solids are scraped by scraper

mechanism to center of clarifier from wherethey are drained out.

Total sludge : 116 M3/Hr Rotational Speed : 31 minutes per rev


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CLARIFIED WATER STORAGE TANK MOC : RCC Total Capacity : 2000 M3CLARIFIED WATER PUMPS: Type of Pump: Horizontal centrifugal. No of Pumps : 3 Nos ( 2W +1S) Capacity : 810 M3/Hr Head : 30 Mtr

DUAL MEDIA FILTER Type : Horizontal Pressure Dual Media Filter. Total No of Filters : 5 Nos ( 4 W + 1S) Flow rate : 400 M3/Hr Velocity : 20 M3/Hr/M2 Filtering Media Anthracite (0.6-0.8mm) : 300 mm ( Bed Height) Purpose: Anthracite removes organic compounds which contributes

to taste and odor of the water. Sand (16/32) : 400 mm ( Bed Height) Purpose: To remove suspended particles up to 10-20 microns.Supporting Media Crushed Gravel ( 6-2) : 100 mm


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DUAL MEDIA FILTER Type : Horizontal Pressure Dual Media Filter. Total No of Filters : 5 Nos ( 4 W + 1S) Flow rate : 400 M3/Hr Velocity : 20 M3/Hr/M2Filtering Media Anthracite (0.6-0.8mm) : 300 mm ( Bed Height)

Anthracite removes organic compounds whichcontributes to taste and odor of the water.

Sand (16/32) : 400 mm ( Bed Height)Remove suspended particles up to 10-20 microns.

Supporting Media Crushed Gravel ( 6-2) : 100 mm Pebble : Various sizes ( 10-3, 12-6, 20-12, 40-25)

400 MM


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Dual Media Filter


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DMF Back washing:

To released & flushed trapped turbidity

Backwash Flow Rate : 420 M3/Hr Backwash Time : 10 min.

Air Scouring: Air scour techniques are employed in

addition to backwash to increase the efficiency ofthe cleansing process.

Blower Type : Twin Lobe.

Capacity : 760 M3/Hr/M2

Air Scoring duration : 5-10 Min.


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Portable water systemActivated Carbon Filter: Carbon filtering is used for filtering drinking water. Carbon Filtering is a method of filtering by using

activated carbon to remove contaminants andimpurities utilizing chemical absorption.

Carbon filters are most effective for removing freechlorine, sediments and volatile organic compounds

Activated Carbon filter type :Vertical Carbon FiltFlow rate: 50 M3/HrCarbon depth ( potable Grade) : 900 MMUnder Bed : Fine silex/ Coarse Silex / Pebbles ( 300 mm )Back wash flow: 32 m3/hrBackwash Time : 10 Min.


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Treated Water Tank Qty :02 nos. MOC : MS Size : 44 Mtr Dia x 12.7 Mtr Ht. Capacity : 17940 M3 (each).


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DM Make Up8%

Cooling TowerMake Up

75% Drinking Water

4%

Service Water4%

Filter Backwash2%

Fire Hydrants7%


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THANK YOU

Documents

WPT Presentation