ON ODOUR EMISSION RATE FROM THE WORKING AREA OF A MUNICIPAL SOLID WASTE LANDFILL IN CHINA

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Ning Qiang
Zhaohai Li
Tao Liu

Resumen

To investigate the odour emission rate from the surface of a municipal solid waste landfill working area in China, a wind tunnel sampler was used to measure the emission rates of volatile organic compounds (VOCs), H2S and odour units. The results showed that the odour emission rate from the non-point source landfill is closely connected with the environmental temperature and the velocity of surface sweeping. In summer, the emission rates of VOCs (measured by PID as isobutylene), H2S and odour units are 385-680 μg•(m2•s)–1, 4-7 μg•(m2•s)-–1, and 46.5-136 OU•(m2•s)–1, respectively; in winter, the emission rates are 140-280 μg•(m2•s)–1, 0.5-1.8 μg•(m2•s)–1, and 8.5-16.2 OU•(m2•s)–1, respectively. The emission rate measured in the high temperature season is nearly 6 times higher than that in the low temperature season. In the experimental wind sweeping velocity range of 0.6 to 4 m•s–1, there is a linear relationship between the emission rate and the wind sweeping velocity. The continuous sweeping experiment shows that the emission rate measured with clean air sweeping is the greatest possible emission rate, which needs to be adjusted when used to estimate the odour concentration in some cases, such as if the sampling time exceeds 10 min or when estimating an area emission.

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