Municipal Solid Waste Burning

Open burning of municipal solid waste (MSW) is increasingly being recognized as a major source of PM10 and PM2.5 emissions in the cities of developing countries along with other sources, such as traffic emissions and industrial and power plant combustion operations. MSW refers to nonindustrial and nonmedical solid waste generated in municipal (urban) areas, i.e., garbage generated from households and commercial establishments in cities. Open burning of MSW (MSW-burning) refers to MSW burned in urban neighborhoods, without the use of incinerators, with the resulting combustion-related pollutants released to the atmosphere at the surface, with relatively less buoyant plumes. MSW-burning differs from biomass burning, as the latter traditionally has been used in the context of burning crop residues and other biogenic residues (such as dung-cakes), often in agricultural settings. In contrast, MSW is not purely biomass, but often includes plastics, rubber, and metal-containing refuse, the burning of which releases toxic emissions (including halogenated compounds from plastics burning). All these factors highlight the importance of MSW-burning to public health at the urban and intracity scale.

In emission inventories conducted for a few major Indian cities, the Central Pollution Control Board of India estimates that open MSW-burning may contribute 5% to 11% of all direct PM emitted from sources within a city boundary. Similar estimates are reported for Mexico City (3% to 30%) and Ulaanbaatar, Mongolia (4% to 7%).Thus, the phenomenon of MSW-burning is likely to be very important to urban public health in India.