2. Our Focus:
To analysis the generation and
characteristic of solid waste in Dhaka city
& Use of updated technologies
To discuss about source of solid waste
To discuss the management system
3. Introduction
Dhaka is one of the most heavily occupied
cities in the world. For this reason there are
huge environmental problems. Waste is
widespread problem of Dhaka city.
At this moment we are concerned and have
to make sure the proper utilization of waste
and we have to recycle all types of waste.
Recycle is the intellectual salutation of urban
waste problem. Because of, if we can recycle
our waste we will also financially get benefits.
4. Details of Waste Generation
Waste composition Bangladesh (Dhaka) %( By
weight)
Food and vegetable 70
Paper product 4
Plastic 5
Metals 0.13
Glass and ceramics 0.25
Wood 0.16
Green waste 11
Moisture 5
Other 65
Source: Ahmed, M.F. & Rahman, M.M. 2000
6. Classification of Wastes:
source Types of solid wastes
residential Food waste, paper,cardboard,tin,glass,household
waste,textiles,leathers etc.
commercial Paper,cardboard,plastic,wood,foodwaste,flass,metal,specialwa
stes
hazardous waste etc.
Construction &
demplition
Wood, steel, concrete etc.
municipal Commercial waste, park waste, special types of waste, wash
besin debris etc.
industrial Industrial process waste , scrap materials, non industrial material
(food waste, rubbish, ashes, special wastes, hazardous wastes)
agricultural Spoiled food waste, agricultural wastes, rubbish, hazardous
wastes
etc.
Tanning waste Surface acid, chromium, ammonium sulphate, calcium etc.
10. Collection System of wastes:
There are two types of collection system :
1. Conventional based
2. Community based
In some residential areas like Kalabagan, Dhanmondi,
Banani, Gulshan, Baridhara and Uttara, ‘house to house’
waste collection service has been organized by some
private initiatives. Rickshaw vans are used for collection
of waste from houses and conveying to municipal
containers (Yousuf 1996, Kazi 1999, Salam 2000)
12. Community Based collection
system :
Final disposal
DCCtruck
Primary transport point
Primary collector
Media vehicle
House hold waste
13. DCC Management:
Dhaka city corporation (DCC) are mainly
maintaining this responsibility.DCC separated it’s
area into 10 zones for supervising of solid waste
production.
The total solid waste management involves 3
departments namely conservancy, transport and
mechanical engineering
DCC conservancy department currently holds 370
trucks and container carriers, 4,920 bin/container
and 300 handcarts per day
It is supported by 7,156 cleaners/ sweepers and
190 supervising officers and only 1 officer to
supervise transports, for all desired activities
14. Total waste generation and its
distribution by source
Data
source
Solid
waste
generati
on
Tons/da
y
Residenti
al (%)
Commer
cial
(%)
Industrial
(%)
Hospital
(%)
Street
(%)
MMI
1991a
1300 46.8 17.3 12.9 0.5 22.6
PAS 1997a 3000-
5000
46.7 20.17 26.7 6.70 --
RSWC
1998a
1200-
1600
47.0 17 13.5 0.5 22
BCAS
1998b
2398 81.9 13.9 2.31 1.87 --
DCC 1999 3500 49.0 21 24.0 6 --
15. Final Disposal /Dumping:
There are six dumping sites of DCC have been
abandoned:
1.Khulshi
2.Amin bazar
3.Gabtoli
4.Lalbag shosan ghat
5.Mugdhapara
6.Jatrabari
At present DCC selected two new sites for dumping
1.Matuali
2.Amin bazar
88% wastes are dumped in Matuali site.This site started
from 2006
16. Dumping process and details
of Matuali site:
In previous time this site has only 50 acres
but now it’s area is about 100 acers
In early days it’s height was 5 meter but
now it’s height is 18 meter
JICA and DCC founded this site
17. Total process :
City corporation use blue color truck for
collecting solid wastes from primary transfer
point
Each truck has a selected identification
number & DCC has a data base of every
truck’s empty weight
A compute software is used for measurement
of solid waste’s weight
18.
19. DCC dump wastes in a
selected place in every
3 months phase
After dumping the
wastes a soil layer has
provided
Wastes are compacted
by mechanical
compactor
20. Recycling :
There is no recycling process or plan in
Matuali site
In 2015 DCC will start recycling of solid
waste like plastic,glass,timber etc
Govt. has plan to produce 50 Mega watt
electricity from this site
21. Examples of energy contents
in different substrates
Substrates KWh/Ton
Cow dung 140
Manure from pipe 180
Manure from poultry 450
Gras 810
Wastes,fruit,vegetables 950
House hold food waste 1300
Food waste restaurant 1300
Waste from slaughter 2000
Pure
carbohydrates/sugar
3900
Proteins 4900
Fat 8500
22. Conclusion:
Ultimate disposal of urban solid waste is done crudely in open
dumps, lowlands or water bodies in an unsanitary manner. As a
result, the surrounding environment of the dumpsites is barely
hygienic. The increasing demand for landfill is also a big problem
for the authority to find suitable lands for dumping wastes. At
current waste generation rate the total land required per year
with existing collection efficiency and 100% collection efficiency
will be 141 acres and 273 acres respectively with a depth of 4
meters. Composting the organic portion of the waste can reduce
this high demand for landfill site since around 74% of the total
waste is organic. It is estimated that composting 50% and 74% of
the total generated waste with 100% collection efficiency the
area required for landfill will be reduced to 157 acres and 99
acres respectively per year with 4 meters of depth. Thus
composting can reduce a significant amount of landfill load. The
remaining inorganic portions can be recycled; thereby reducing
the expenditure to be incurred on landfill to a minimal.
