Engagement with CSE since 2011

RW-convention in

2012. CSE is one

among other

organizers

Received Training on

Tools & Approaches for

CWS Management from

CSE, 2018. held at India

Received Training on Urban

Wastewater and Rainwater

Management

DEWATS, 2012

Mainstreaming RWHS at

Industry for production -

2019

Reflection in field

Training facilitated by

CSE and organized

by WaterAid in 2011

Mainstreaming Rainwater Harvesting System in Industry for production purpose : Bangladesh

Zahid Hossain

Consultant-WASH, UNICEF

WATER DEMAND AT TEXTILE

250 to 300 litres water needs for 1 kg cloth washing and dyeing according to PaCT ( IFC), which is equivalent to daily water use for 2 people (Restiani, 2016)

RMG & Textile sector consuming 1500 billion litresof groundwater annually ( It was published on 2014 by a survey, was conducted by Netherland and Bangladesh Government)

Groundwater

depletion

Groundwater table depletion

rate is 1-2 meters every year

due to huge water

withdrawing against recharge

Sources: CIMMYT-Bangladesh on 2014 under USAID funded research project

Why Rainwater Harvesting at RMG & Textile sector?

0

500

1000

1500

2000

2500

3000

3500

1953

1956

1959

1962

1965

1968

1971

1974

1977

1980

1983

1986

1989

1992

1995

1998

2001

2004

2007

2010

2013

2017

Rai

nfa

ll, m

m

Year

Yearly Rainfall, Dhaka

0

200

400

600

800

Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec

Rain

fall

, m

m

Monthly Rainfall, Dhaka

2005 2006 2007 2008 2009 2010

2011 2012 2013 2015 2016 2017

Average rainfall 2000

mm at Dhaka and

surrounding

Country’s rainfall

1500 to 4000 mm,

average 2000 mm

Rain pattern changing

and unpredicted

Source: Bangladesh Agriculture Research Council

WHY RAINWATER HARVESTING AT RMG & TEXTILE SECTOR?

Considering the roof top as catchment area of factories under RMG and Textile sector (6850 factories including 4560 textile, average catchment area 8000 sqm). Source: BGMEA and BKMEA

90 billion litres of rainwater could be harvested annually

90 billions litres equivalent to 336 core Taka or 40 million US $ annually (38.37 Tk per cubic meter water) (1$ = 84 BDT)

WHY RAINWATER HARVESTING AT RMG & TEXTILE SECTOR?

Hardness free or less than 5 mg/l- water is essential for wet processing purposes, so groundwater treatment is essential in this regard (10 BDT is needed for 1 cubic water water), but in case of rainwater –no need

Rainwater has been storage into tank under gravity flow whereas energy and technology need for groundwater extraction

Solving Waterlogging problem emerging due to climate change

Rainwater Harvesting at Factory, Case study-1

Next Accessories Ltd

Underground recharge pitStorage tank

Filter tank

A

B

CD

Filter Tank and Storage Tank

Storage tank

Filter

tank

Groundwater Recharge

Inlet& Settler

Recharge

pit

Rainwater Harvesting at Factory, Case study-2

Fakir Fashion Ltd

Water reservoir

Filter

13000 30000

14000

7000

Inlet ( Rain comes from roof)Outlet (Filter water goes for uses)

5500

19000

Plan for Filter & Storage

A A

B

B

Design & Drawing by WaterAid Bangladesh Number of drawing 1

Scale: mm

Filter and Storage Design

Campus A

Campus B

Campus C

Inlet OutletStone chip

Rainwater Harvesting at Factory, Case study-2

Pic : Catchment, Pipe networking and Storage

Collector pipe

Roof

Fakir Fashion Ltd Filter tank

(underground)

Pipes come

down from

roof

Rainwater Harvesting at Factory-Case study-3

Metro Knitting & Dyeing Mills Ltd

Rainwater Harvesting at Factory-Case study-4

Epic Garments Manufacturing Company Ltd (EGMCL)

Pic 4: Catchment, Pipe networking and Storage

Catchment and Harvested rainwater-4 factories

NAL- Next Accessories Ltd

FFL- Fakir Fashion Ltd

MKDML- Metro Knitting and Dyeing Mills Ltd

EPIC-Epic Garments Manufacturing Company Ltd

6500

2294018390

30365

45009372 7700

20000

0

10000

20000

30000

40000

NAL FFL MKML EGMCLCat

chm

ent

Are

a, m

2

Fig 4: Catchment Area for RHS

To be used in future for RWHS Using for RWHS

Calculation: Value for money and ROI

Return on investment for RWHS is high

Reducing dependency on groundwater, eventually contributing to environmental sustainability

Controlling water logging in factory causing by heavy rainfall due to climate change

Helping for getting score for LEED certificate as well as helping to meet other compliance

CONCLUDING

REMARK

Thanks