In this slide we discuss about the water pollution and try to give a simple solution to recover this problem.

1. PRESENTATION
ON
MAJOR ENVIRONMENTAL PROBLEM IN
BANGLADESH
Prepared By,
THE CRANKS
Team Members:
MD. AJWAD ANWAR (C)
ASIF RAIHAN
MD. SHAKHAWAT HOSSAIN

2. The major Environmental Problem of Bangladesh is :
WATER POLLUTION

3. Consequences of water pollution lead to :
 Waterborne diseases
 Death of Aquatic animals
Disruption in natural
food chain
Destruction of Ecosystem

4. Some existing solutions :
Preventative Measures :
• Preventing disposal of Chemicals, Medicines and
Industrial wastes fall directly into the river.
• Encouraging the use of organic fertilizers and
moderate use of pesticides.
Common water purification practices :
• Industrial and domestic waste water treatment.
Alternate water source utilization:
• Rain water harvesting.

5. Our proposed solution is….
FLOATING TREATMENT WETLANDS
It is a new technology containing a floating
porous platform on which plants are grown.
Plant root are hanged inside the water column.

6. Working mechanism :

7. • This wetland can remove BOD, COD, nitrogen,
phosphorous, some pathogenic micro-organism and other
waste water pollutants.

8. Floating treatment wetlands
• Can be implemented on large scale.
• Suitable for Bangladeshi weather condition.
• Use local, readily available and cheap materials.
•Require a little maintenance.
*** Recently it is implemented in Lalmonirhat, Bangladesh ***

9. Removal Performances (Saeed et al., 2012;
Saeed and Sun, 2012)
0
20
40
60
80
100
120
NH4-N NO3-N P
concentration
mg/L
Pollutants
Tannery wetlands
In Out
0
20
40
60
80
100
120
NH4-N NO3-N P
concentration
mg/L Pollutants
Tannery wetlands
In Out
0
20
40
60
80
100
120
NH4-N NO3-N P
concentration
mg/L
Pollutants
Textile wetlands
In Out
0
1000
2000
3000
4000
5000
BOD5 COD
concentration
mg/L
Pollutants
Textile wetlands
In Out
0
20
40
60
80
100
120
NH4-N NO3-N P
concentration
mg/L
Pollutants
Municipal wetlands
In Out
0
1000
2000
3000
4000
5000
BOD5 COD
concentration
mg/L
Pollutants
Municipal wetlands
In Out

10. Cost to built a floating mat:
•For a 8’ * 3’ mat constructed with PVC pipe and
fishing net, it costs about 1500 taka only.
•Also people can use local materials for the flotation
of the mat.

11. Source:
Dr. Tanveer Ferdous Saeed
1. Treatment of tannery wastewater in a pilot-scale hybrid constructed wetland
system in Bangladesh. Chemosphere, 88 (9). pp. 1065-1073.
2. A review on nitrogen and organics removal mechanisms in subsurface flow
constructed wetlands: dependency on environmental parameters, operating
conditions and supporting media. Journal of Environmental Management, 112 .
pp. 429-448.
3. A lab-scale study of constructed wetlands with sugarcane baggage and
sand media for the treatment of textile wastewater. Bio resource Technology,
128 . pp. 438-447.

12. THANK YOU 