Assessment of gases emission from the operation of the semi-aerobic landfill site by solid waste of Kathmandu Valley, Nepal

Devkota, Rohini Prasad and Cockfield, Geoff and Maraseni, Tek Narayan and Bhattarai, Rabi and Devkota, Bhupendra (2012) Assessment of gases emission from the operation of the semi-aerobic landfill site by solid waste of Kathmandu Valley, Nepal. Environmental Research Journal, 6 (3). pp. 182-186. ISSN 1994-5396

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Abstract

Many landfill sites around the world have been poorly engineered and operated and hence face vociferous public opposition and criticism for their adverse environmental impacts. Because of the concerns arising from poor operation and management, siting and operation of landfill sites are very sensitive public issues in Nepal. The aim of this study was to assess the environmental impacts due to the foul odour during the operation of the the Sisdol landfill in Okharpauwa VDC, Nuwakot, Nepal. The study focused on identifying the composition of gases from the Kathmandu Valley's solid waste and impacts on local areas air flow moments from the land fill site. LandGEM Ver.3.02 Model was used for the emission calculation of the landfill gases. Furthermore, the gastec and specified ditector tubes were used for the measurement of H2S gas at the study area. Among nine sites, the H2S gas concentration at site (Vent pipe of landfill site) was 1.4 ppm (recorded maximum). The gas was found to be diluted at 208m downwind location and reached the value near to clean air, i.e., 0.2 ppb. The observed gas concentration was lower than the toxic range though the concentration level was found to have characteristic odour. The significant level of adverse impact was found nearby the landfill site. People working surrounding area of the landfill site were more vulnerable to different impacts.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: No
Item Status: Live Archive
Additional Information: © Medwell Publishing 2012. Published version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - USQ Other
Date Deposited: 15 Jul 2013 23:36
Last Modified: 01 Feb 2017 03:31
Uncontrolled Keywords: landfill; methane; hydrogen sulfide; air flow; Nepal
Fields of Research : 05 Environmental Sciences > 0502 Environmental Science and Management > 050204 Environmental Impact Assessment
09 Engineering > 0905 Civil Engineering > 090505 Infrastructure Engineering and Asset Management
10 Technology > 1002 Environmental Biotechnology > 100204 Environmental Biotechnology Diagnostics (incl. Biosensors)
Socio-Economic Objective: D Environment > 96 Environment > 9601 Air Quality > 960199 Air Quality not elsewhere classified
Identification Number or DOI: 10.3923/erj.2012.182.186
URI: http://eprints.usq.edu.au/id/eprint/23749

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