water pollution in dhaka city (hatirjheel dhaka , bangladesh)

CE-6312Water Pollution and its Control

Prepared by Submitted to Md. Ahsan Habib Dr. Md. Touhid Ur Rahman

Roll No: 1013110001 Professor

Dept. of Civil Engineering, MIST

Presentation on

Water pollution in Dhaka City.

(Hatirjheel Project)

Hatirjheel Project

Map of Hatirjheel Project

Hatirjheel

04/05/2015

Objectives: To identify the causes and sources of

water pollution of Hatirjheel. To know the States of water pollution . To know impacts of water pollution . To find out a way to mitigate the water

pollution of Hatirjheel.

Causes# “according to plan only rain water to get

through the project areas. But, instead, waste water from different adjoining areas are released in the Hatirjheel canals and mixed with the rain water and made it difficult to keep the water clean., the water in the lake is being polluted with sewage.” Dean of BUET Architecture Department Prof. Dr. Mujibar Rahman told Ittefaq (11.03.2014)

# Most of the visitors do not apply civic sense when they go to the project area. They carry with them soft drinks bottles, polythene filled with ground nut, biscuits and newspaper and leave those there after use. Since those are not removed, environment gets polluted.

Causes

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Causes

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Source of pollution

The main source of potential pollution is sewer line. Different location’s sewerage were disposed in this

project by sewer line. The industrial waste water i,e chemical, color, toxic water

comes from Garments, Automobile factories, treatment plants e.t.c were directly disposed on this project.

The residential waste like human excreta, grey water, e.tc were disposed into the water in different location of the project by pit.

Sources

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Sources

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Sources

Present Status of water Source: INTERNATIONAL JOURNAL OF TECHNOLOGY ENHANCEMENTS AND EMERGING ENGINEERING

RESEARCH, VOL 2, ISSUE 6 98 ISSN 2347-4289 (Copyright © 2014 IJTEEE).

By testing existing water we have pH value 6.9 to 7.1 where as ECR.97 standard range is 6.5 to 8.5 so the pH is 100% satisfied.

By testing existing water we have color value 25 to 50 pt-Co unit where as ECR.97 standard range is 15 pt-Co unit so the color is so high.

By testing existing water we have Turbidity value 11 to 13 NTU where as ECR.97 standard range is 10 NTU so the turbidity value is nearly the standard.

By testing existing water we have carbon oxide value 35 to 60 mg/l where as ECR.97 standard range is 4 mg/l so the carbon dioxide value is very high.

Present Status of water

By testing existing water we have iron value .15 to .25 mg/l where as ECR.97 standard range is 1mg/l so the iron value is very low.

By testing existing water we have BOD value 0 to 10 mg/l where as ECR.97 standard range is 0.2 mg/l so the BOD value is so high.

By testing existing water we have COD value 280 to 600 mg/l where as ECR.97 standard range is 200 to 500 mg/l so the COD value nearly standard.

By testing existing water we have alkalinity value 90 to 345 mg/l as CaCO3 where as ECR.97 standard range is 600 mg/l as CaCO3 so the alkalinity value is very low.

By testing existing water we have hardness value 150 to 300 mg/l as CaCO3 where as ECR.97 standard range is 500 mg/l as CaCO3 so the hardness value is very low.

States of pollution

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States of pollution

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States of pollution

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States of pollution

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Importance of the Project This Project is very important to

accumulating rainwater, for preventing flood, reducing the rate of impure water .

Very good place to visit this project for the visitors.

Visitors of the project

Impacts on public health Some people were bathing and swimming on the

waste water, This people are falling into different types of water borne diseases.

For change in water color and odor, some pollutants may also be harmful to human health.

When chlorine levels are too low, these often turn the water a green color and it is very dangerous for human health.

In Hatirjheel project water mixed with chemical, toxic water, black algae, e.tc these causes adverse effects to human health such as skin irritations.

Discussion The water quality of Hatirjheel Lake and find that water of

Hatirjheel Lake can be reused if proper treatment plant establish and prevent the contamination source surrounding the water body. Routine research work with wide public awareness, government participation and government regulations can save the water of Dhaka met-ropolitan city and thus a safe and sound water environment can be made for future generations.

Remedial measure

Identifying new toxic substances, and implementing pollution prevention and control strategies.

Preventing and controlling harmful discharge. Necessity of reusing of surface water for sustaina-

ble development. Preventing environmental threats before they turn

into actual problems. Developing water quality and ecosystem health ob-

jectives. Increased awareness of the importance of

freshwater resources.

THANKS TO ALL