LGED2012LCWater-Dr.Bari.ppt

7/29/2019 LGED2012LCWater-Dr.Bari.ppt

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Sustainable Urban Water Supply:Strengthening the Resilience to Climate Change in Coastal Towns

Dr. Quazi H. Bari

Professor of Environmental EngineeringDepartment of Civil Engineering

SUB, KUET


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OUTLINES

Water Environment in Bangladesh

Urban Water Supply in Coastal Townes

Solar Desalination

Other Sustainable Water Supply Options

17 February 2013 SUB, KUET, LGED 2


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Water Environment in Coastal Area


Source: Internet


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Urban Water Supply in Coastal Townes

Pipe Water Supply: From Underground Aquifer,

Surface Water Source with treatment plants. (Both

sources are reducing by time)

Community/Individual Tube-wells: Shallow, Deep.

Other individual System/Collection, Jar/Bottle

Potential Methods: SOLAR Desalination/Alternative

Water Reuse with minor Treatment



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Solar Desalination

Conventional System: Basin type solar still, Multi effect

solar still, Tubular Solar Still.

Hybrid System



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Specific Results


20

30

40

50

60

70

0 20 40 60 80

Days (Between 27.02.06 to 28.11.06)

Temperature,

oC Ta.3p

BT.3p

ME.3p

Ta.av

BT.av

ME.av

20

30

40

50

60

70

7:00AM

9:00AM

11:00AM

1:00PM

3:00PM

5:00PM

7:00PM

Temperature,

oC Ta.M

BT.M

ME.M

Ta.N

BT.N

ME.N

0

0.4

0.8

1.2

1.6

2

0 20 40 60 80

Days

Dis

tillateL/m2

BTss

MEss

y = 0.002x + 0.2923

R2 = 0.7126

y = 0.002x - 0.0153

R2

= 0.70540.8

1

1.2

1.4

1.6

1.8

400 450 500 550 600 650 700

Area Under Temperature curveoC.hr

Distillate,

L/m2

BT

ME


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Specific Results

0

100

200

300

400

500

600

0 20 40 60 80

Days

Chloride,mg/L

Raw

BT

ME

y = 1.938x - 197.1

R2 = 0.8279

y = 2.0187x - 283

R2 = 0.863

300

400

500

600

700

800

300 350 400 450 500oC.hr, Ambient

oC.hr,Insidestills

BT

ME


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Comparison of results of direct solar desalination systems


Sl.

No.

System Place Solar

intensity(MJ/m2.d)

Ambient

meantemperature

(oC)

Productivity

(L/m2.d)

1 Steeped Basin Bangladesh 16.2 32 1.5-2.5

2 Hybrid Bangladesh 16.2 20-32 4.0-5.0

3 Double basin solar still with side insulation Bahrain 18.15 39 3.91

4 Single basin solar still with side insulation Bahrain 18.15 39 2.84

5 Inclined solar still with black-fleece wick North Cyprus 11.98 25 2.99

6 Vertical solar still Algeria 17.31 40 0.5-2.3

7 Plastic single basin solar still Italy 27.00 30 1.80

8 Single basin solar still with KMnO4 Jordan 21.56 27 5.75

9 Single basin solar still with 50% charcoal Jordan 21.56 27 5.20


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Alternatives



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SUMMARY

Solar Desalination Method

Deep Protected Central Pond/Lake (not fish pond) under

municipality with raised Bank for rain water collection

and supply for Drinking/Cooking. (Need minor easy

Treatment)

As all conventional potential sources are reducing by

Time!!!

Available family size treatment methods



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Thank You

LGED2012LCWater-Dr.Bari.ppt

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