Information Booklet on Solid Waste Management SOLID WASTE ...
Solid Waste Management of Dhaka City Corporation
-
Upload
mosfiqur-rahman-saikat -
Category
Environment
-
view
33 -
download
5
Transcript of Solid Waste Management of Dhaka City Corporation
Solid waste management of Dhaka city
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
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.
Details of Waste GenerationWaste 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
Past, Present & Future Growth Rate Comparison of Waste
Year Population(total)
Urban population(%)
Waste rate kg/c/day
Total waste tones/day
1991 20872204 20.15 0.49 98735
2001 28808477 23.39 0.5 11695
2004 32765152 25.08 0.5 16382
2025 78440000 40 0.6 47064
Source: ADBI and ADB 2000 & Zurbrugg 2002
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,specialwasteshazardous 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.
Tanning Waste Agricultural Waste
Resindential Waste Commercial Waste
Construction wastes Municipal Waste
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)
Convential Based collection System :
Final disposal
DCC truckNearest roadside bin
House holder transporting
House hold wastes
Community Based collection system :
Final disposalDCC truck
Primary transport point
Primary collectorMedia vehicle
House hold waste
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
Total waste generation and its distribution by sourceData source
Solid waste generationTons/day
Residential (%)
Commercial(%)
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 --
Final Disposal /Dumping:
There are six dumping sites of DCC have been abandoned:1.Khulshi 2.Amin bazar3.Gabtoli4.Lalbag shosan ghat5.Mugdhapara6.Jatrabari
At present DCC selected two new sites for dumping
1.Matuali2.Amin bazar 88% wastes are dumped in Matuali site.This site
started from 2006
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
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
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
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
Examples of energy contents in different substrates
Substrates
KWh/Ton
Cow dung 140Manure from pipe 180Manure from poultry
450
Gras 810Wastes,fruit,vegetables
950
House hold food waste
1300
Food waste restaurant
1300
Waste from slaughter
2000
Pure carbohydrates/sugar
3900
Proteins 4900Fat 8500
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.
THANK YOUPrepared by :
MD. MOSFIQUR RAHMAN
ID: 11.02.03.093