1. ANKIT KUMAR GUPTA
CIVIL ENGINEERING
13UCE016
NATIONAL INSTITUTE OF TECHNOLOGY AGARTALA
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2. INTRODUCTION
Water pollution is the contamination of
water bodies (e.g. lakes, rivers, oceans and
groundwater).
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3. 97% OF WATER ON EARTH IS EITHER SALTY OR
POLLUTED.
EVERY SECOND RIVER IN THE WORLD IS POLLUTED.
1.4 BILLION PEOPLE DO NOT HAVE SAFE DRINKING
WATER.
IN DEVELOPING COUNTRIES, 70% OF INDUSTRIAL
WASTE IS DUMPED IN WATER UNTREATED.
BY 2050, THERE WILL BE MORE PLASTIC THAN FISH IN
OCEANS.
Source – www.wikipedia.com 3

4. 4
1. POINT SOURCES 2. NON POINT SOURCES

5. SEWAGE AND WASTE WATER.
INDUSTRIAL WASTE.
MINING ACTIVITIES.
USE OF CHEMICAL FERTILIZERS AND PESTICIDES.
URBAN DEVELOPMENT.
BURNING OF FOSSIL FUELS.
ACCIDENTAL OIL LEAKAGE.
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6.  DISEASES CAUSED BY DRINKING CONTAMINATED WATER.
MALARIA.
CHOLERA.
DIARRHEA.
HEPATITIS A.
TYPHOID.
DYSENTERY.
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200 TURTLES IN AUSTRALIA’S
SURROUND WATERS DIE EACH
YEAR.
BIRDS AND MAMMALS
BECOME COATED WITH OIL.

8. 8
CHAIN DESTRUCTION.
ACID RAIN.
INFERTILES LAND.

9. 9
PHYSICAL TESTING
CHEMICAL TESTING
TEMPERATURE.
TOTAL DISSOLVED SOLIDS.
TURBIDITY.
pH.
BIOLOGICAL OXYGEN DEMAND(BOD).
CHEMICAL OXYGEN DEMAND(COD).
NITRATES.

10. 10
WATER
POLLUTION
CONTROL

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SEWAGE TREATMENT.
INDUSTRIAL WASTEWATER TREATMENT.
AGRICULTURAL WASTEWATER TREATMENT.
CONTROL OF URBAN RUNOFF.

12. SCREENING
PRIMARY
TREATMENT
SECONDARY
TREATMENT
FINAL
TREATMENT
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13. 13
GRIT
CHAMBER
CHLORI
NATION
BAR
SCREEN
Raw
sewage
outflow
CHLORINATION
TANK
SETTLING
TANK
SLUDGE
DRYING
BED
SLUDGE
DIGESTER
Sludge

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Raw sewage
Sludge
digester
BAR
SCREEN
GRIT
CHAMBER
SETTLING
TANK
AERATION
TANK
SETTLING
TANK To stream
CHLORINATION
TANKActivated sludge
Air
(pump)
Sludge drying bed

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TURN OFF RUNNING
WATER.
PARTICIPATE IN A
CLEAN UP PROGRAMME.

17. 17
SPREAD
AWARENESS.
STOP FLUSHING
TOXIC MATTERIALS.

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THANK YOU!!!