Daily production of solid waste in Dhaka City is more than 4000 Metric Tons. Of those 200 Metric Tons of hospital and clinical wasteis a mixture of toxic chemicals, radioactive elements and pathological substances.15 to 20 percent of medical wastes are highly dangerous for human lives. These waste when dumped with other municipal wastes inthe open land poses threat to serious health hazard to the city people. http://kitakyushu.iges.or.jp/docs/sp/swm/2%20Solid%20Waste%20Management%20in%20Dhaka.pdf
An Inception Report on Control & Management of Polyethylene bags in Bangladesh shows that people of Dhaka Cityalone used 600 million bags a day.During floods, floodwater did not drain quickly, as one of the major reasons was due to polyethylene in the drainingsystem. Polyethylene and plastic materials are not biodegradable.
KieranTimberlake Design + Research Laboratory 01/27/2012PRINCIPAL SOURCES OF SOLID WASTESresidencecommercial establishmentinstitutionsindustrial and agricultural activities Source: Urban Indicators Program Phase I: 1994 – 1996 (http://www.hsd.ait.ac.th/ihsa/si/a13lc/dhaka/ui.html)
COMPOSITION OF SOLID WASTE IN RESIDENTIAL AND INDUSTRIAL AREAS
KieranTimberlake Design + Research Laboratory 01/27/2012DISPOSAL METHODSOPEN DUMPING---practiced extensively inBangladeshSANITARY LAND FILLINGINCINERATION---If incineration is to become an economi-cal method for solid waste disposal, useful materials andenergy must be recovered by the processCOMPOSTING OF REFUSE---many typesof microrganisms already present in the wastebiostabilize the organic matter in the waste andproduce a soil conditioner.
Composting for a cleaner atmosphere and richer soil? Waste Concern is trying to reduce the decomposition time of 40 days by using inoculums (compost digester) to accelerate the decomposition. Waste Concern has developed a good network with the nurseries and fertilizer marketing companies to sell their compost at a price of TK 2.5 to TK 5.0 per kg. The quality of compost is monitored in the laboratories of Soil Sciences Department of Dhaka University. Table 5 shows the nutrient value of the compost produced by this plan in comparison with the other compost.