Investigation and modeling of odors release from membrane holes on daily overlay in a landfill and its impact on landfil
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RESEARCH ARTICLE
Investigation and modeling of odors release from membrane holes on daily overlay in a landfill and its impact on landfill odor control Jun Jiang 1,2 & Jianhua Li 1 & Sami Rtimi 3 Received: 26 March 2020 / Accepted: 9 September 2020 # The Author(s) 2020
Abstract In the present work, we studied the NH3 and H2S odor fluxes between the exposed working area and the HDPE covering film holes of the daily overlay in an actual landfill site with a daily operating area of 1600 m2 in Hangzhou, China. We showed that the odors were released from the membrane pores and the average concentrations of NH3 and H2S release reached 109.6 ± 56.6 and 86.0 ± 31.1 mg/m2/s, respectively. These concentrations are 43.8 and 57.3 times the exposed working surface. Furthermore, mathematical modeling based on the total amount of odor release revealed that there was a linear positive correlation between the total odor amount and the landfill operation area. However, the maximum number of film holes allowed on the covering layer has nothing to do with the working area and exposed working time, which is mainly determined by the HDPE film width in terms of ensuring the deodorizing effect of the covering operation. If the HDPE film with a width of more than 4 m is used, the number of film holes allowed within 100 m is more than 8. Therefore, in order to reduce the odor, the appropriate film width should be selected according to the actual operating conditions such as the mechanical operation level at the time of welding, the design of the landfill site, and the operational norms. This study explores the effect of film hole quantity of the daily cover in the landfill on the odor release from the landfill, which can provide an important reference for the design, operation, and decision-making of the daily cover operation of the sanitary landfill. Keywords Landfill site . Odors release . NH3 . H2S . Modeling . Environment
Introduction Odor accounts for less than 1% v/v of total landfill gas (Lim et al. 2018), but because of its harm to surrounding air quality, it affects the health of surrounding residents (Liu et al. 2015; Njoku et al. 2019). Therefore, it has been considered the biggest pollutants to landfills (Drew et al. 2007). Landfill odor control has attracted the attention of landfill managers, designers, and the neighboring areas (Hurst et al. 2005; Njoku et al. 2019).
Responsible editor: Philippe Garrigues * Sami Rtimi [email protected] 1
College of Environmental Science and Engineering, Tongji University, Shanghai, China
2
Hangzhou Urban Construction Investment Group Co., Ltd., Hangzhou, China
3
Ecole Polytechnique Fédérale de Lausanne, EPFL-STI-LTP, Station 12, CH-1015 Lausanne, Switzerland
There are many materials used for temporary covering in landfills, including traditional covering materials such as highdensity polyethylene (HDPE) film, geotextiles, and geosynthetic bentonite cushion (GCL) (Querio and Lundell 1992; Capaccioni et al. 2011; Take et al. 2012; Rowe et al. 2016), and some non-traditional materia
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