| Title: | Simultaneous biodegradation of methane and styrene in biofilters packed with inorganic supports: Experimental and macrokinetic study |
| Author(s): | Khabiri B; Ferdowsi M; Buelna G; Jones JP; Heitz M; |
| Address: | "Department of Chemical Engineering and Biotechnological Engineering, Faculty of Engineering, 2500 boulevard de l'Universite, Universite de Sherbrooke, Sherbrooke, J1K 2R1, Quebec, Canada. Department of Chemical Engineering and Biotechnological Engineering, Faculty of Engineering, 2500 boulevard de l'Universite, Universite de Sherbrooke, Sherbrooke, J1K 2R1, Quebec, Canada. Electronic address: Michele.Heitz@USherbrooke.ca" |
| DOI: | 10.1016/j.chemosphere.2020.126492 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "Four upflow 0.018 m(3) biofilters (3 beds), B-ME, B-200, B-500 and B-700, all packed with inorganic materials, were operated at a constant air flow rate of 0.18 m(3) h(-1) to eliminate methane (CH(4)), a harmful greenhouse gas (GHG), and styrene (C(8)H(8)), a carcinogenic volatile organic compound (VOC). The biofilters were irrigated with 0.001 m(3) of recycled nutrient solution (NS) every day (flow rate of 60 x 10(-3) m(3) h(-1)). Styrene inlet load (IL) was kept constant in each biofilter. Different CH(4)-ILs varying in the range of 7-60 gCH(4) m(-3) h(-1) were examined in B-ME (IL of 0 gC(8)H(8) m(-3) h(-1)), B-200 (IL of 9 gC(8)H(8) m(-3) h(-1)), B-500 (IL of 22 gC(8)H(8) m(-3) h(-1)) and B-700 (IL of 32 gC(8)H(8) m(-3) h(-1)). Finally, the effect of C(8)H(8) on the macrokinetic parameters of CH(4) biofiltration was studied based on the Michaelis-Menten model. Average C(8)H(8) removal efficiencies (RE) varying between 64 and 100% were obtained at CH(4)-ILs increasing from 7 to 60 gCH(4) m(-3) h(-1) and for C(8)H(8)-ILs range of 0-32 gC(8)H(8) m(-3) h(-1). More than 90% of C(8)H(8) was removed in the bottom and middle beds of the biofilters. By increasing C(8)H(8)-IL from 0 to 32 gC(8)H(8) m(-3) h(-1), maximal EC in Michaelis-Menten model and macrokinetic saturation constant declined from 311 to 39 g m(-3) h(-1) and from 19 to 2.3 g m(-3), respectively, which confirmed that an uncompetitive inhibition occurred during CH(4) biofiltration in the presence of C(8)H(8)" |
| Keywords: | "*Biodegradation, Environmental Filtration Greenhouse Gases Methane/*metabolism Styrene/*metabolism Biofiltration Greenhouse gas Inhibition Methane Michaelis-Menten model Volatile organic compound;" |
| Notes: | "MedlineKhabiri, Bahman Ferdowsi, Milad Buelna, Gerardo Jones, J Peter Heitz, Michele eng England 2020/05/24 Chemosphere. 2020 Aug; 252:126492. doi: 10.1016/j.chemosphere.2020.126492. Epub 2020 Mar 17" |
