Impact of nitrate-enhanced leachate recirculation on gaseous releases from a landfill bioreactor cell |
| |
| Authors: | G Tallec C Bureau P Peu JC Benoist M Lemunier A Budka D Presse T Bouchez |
| |
| Institution: | 1. Cemagref, UR HBAN, Parc de Tourvoie, BP44, F-92163 Antony, France;2. Cemagref, UR GERE, 17 Avenue de Cucillé, CS 64427, F-35044 Rennes, France;3. Suez-Environnement, CIRADE, 38 Av. Jean Jaurès, 78440 Gargenville, France;4. SITA France, 132 Rue des 3 Fontanot, 92000 Nanterre Cedex, France;1. Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China;2. Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China;1. Department of Materials Science and Metallurgical Engineering, University of Barcelona, Martí i Franquès, 1, E-08028 Barcelona, Spain;2. Department of Chemical Engineering, University of Barcelona, Martí i Franquès, 1, E-08028 Barcelona, Spain;3. Advanced Water Management Centre, University of Queensland, Brisbane, QLD 4072, Australia;1. School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China;2. The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China;1. Université de Lyon, INSA-Lyon, DEEP laboratory, EA7429, F-69621 Villeurbanne Cedex, France;2. Université de Liège, Argenco Department, GeMMe Laboratory, 13/A Allée de la découverte, Bât. B52, 4000 Liège, Belgium;3. Suez France, 16 Place de l’Iris, 92040 Paris la Défense, France;1. Jiangsu Key Laboratory of Agricultural Meteorology, School of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044 (China);2. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);3. Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044 (China) |
| |
| Abstract: | This study evaluates the impact of nitrate injection on a full scale landfill bioreactor through the monitoring of gaseous releases and particularly N2O emissions. During several weeks, we monitored gas concentrations in the landfill gas collection system as well as surface gas releases with a series of seven static chambers. These devices were directly connected to a gas chromatograph coupled to a flame ionisation detector and an electron capture detector (GC-FID/ECD) placed directly on the field. Measurements were performed before, during and after recirculation of raw leachate and nitrate-enhanced leachate. Raw leachate recirculation did not have a significant effect on the biogas concentrations (CO2, CH4 and N2O) in the gas extraction network. However, nitrate-enhanced leachate recirculation induced a marked increase of the N2O concentrations in the gas collected from the recirculation trench (100-fold increase from 0.2 ppm to 23 ppm). In the common gas collection system however, this N2O increase was no more detectable because of dilution by gas coming from other cells or ambient air intrusion. Surface releases through the temporary cover were characterized by a large spatial and temporal variability. One automated chamber gave limited standard errors over each experimental period for N2O releases: 8.1 ± 0.16 mg m?2 d?1 (n = 384), 4.2 ± 0.14 mg m?2 d?1 (n = 132) and 1.9 ± 0.10 mg m?2 d?1 (n = 49), during, after raw leachate and nitrate-enhanced leachate recirculation, respectively. No clear correlation between N2O gaseous surface releases and recirculation events were evidenced. Estimated N2O fluxes remained in the lower range of what is reported in the literature for landfill covers, even after nitrate injection. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
