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Improvement of methane biofiltration by the addition of non-ionic surfactants to biofilters packed with inert materials |
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| Authors: | Antonio Avalos Ramirez,Balbina P. Garcí a-Aguilar,J. Peter JonesMichè le Heitz |
| Affiliation: | a Department of Chemical Engineering and Biotechnological Engineering, Faculty of Engineering, Université de Sherbrooke, 2500 Boulevard de l’Université, Sherbrooke, QC J1K 2R1, Canada b Division of Environmental Technology, Universidad Tecnológica de Nezahualcóyotl (UTN), Circuito Universidad Tecnológica S/N col. Benito Juárez, Ciudad Nezahualcóyotl, Estado de México, C.P. 57000, Mexico c Institut de Recherche et de Développement en Agroenvironnement (IRDA), 2700, rue Einstein, Québec, QC G1P 3W8, Canada |
| Abstract: | The effect of non-ionic surfactants on the biofiltration of methane (CH4) was analyzed. Two biofilters (BF) treating CH4 were operated for one year at fixed CH4 concentration of 4.8 g m−3 and air flow rate of 0.25 m−3 h−1. Three polyoxyethylenes (Brijs), and 3 mono polyoxyethylenesorbitans (Tweens) were added to the nutrient solution at a concentration of 0.5% (w/w). Without surfactant, CH4 conversion had an average level of 35%, with Brijs the CH4 conversion varied between 38% and 46%, and with Tweens between 43% and 48%. The non-ionic surfactants decreased the biomass accumulation in the packed bed due to their detergent character. Biofilters were operated in a range of nitrogen concentration in the nutrient solution from 0.5 to 2 gN L−1 using Tween 20 at a concentration of 0.5% (w/w). The ECmax observed in this study, 45 g m−3 h−1, occurred when the nitrogen concentration was 1 gN L−1. |
| Keywords: | Methane Biofilter Non-ionic surfactant Inert packing material Hydrophilic-lipophilic balance Biomass production |
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