title: Statistical assessment of dumpsite soil suitability to enhance methane bio-oxidation under interactive influence of substrates and temperature.
abstract: Biocovers are considered as the most effective and efficient way to treat methane (CH4) emission from dumpsites and landfills. Active methanotrophs in the biocovers play a crucial role in reduction of emissions through microbiological methane oxidation. Several factors affecting methane bio-oxidation (MOX) have been well documented, however, their interactive effect on the oxidation process needs to be explored. Therefore, the present study was undertaken to investigate the suitability of a dumpsite soil to be employed as biocover, under the influence of substrate concentrations (CH4and O2) and temperature at variable incubation periods. Statistical design matrix of Response Surface Methodology (RSM) revealed that MOX rate up to 69.58μgCH4g-1dwh-1could be achieved under optimum conditions. MOX was found to be more dependent on CH4concentration at higher level (30-40%, v/v), in comparison to O2concentration. However, unlike other studies MOX was found in direct proportionality relationship with temperature within a range of 25-35°C. The results obtained with the dumpsite soil biocover open up a new possibility to provide improved, sustained and environmental friendly systems to control even high CH4emissions from the waste sector.
authors.affiliation: Department of Environmental Science and Engineering, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India; Department of Environmental Sciences, Central University of Haryana, Mahendergarh, Haryana 123029, India. Electronic address: sk_somvir@yahoo.com.
authors.forename: Somvir
authors.initials: S
authors.lastname: Bajar
authors.affiliation: Department of Environmental Science and Engineering, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India; Department of Environmental Sciences, Central University of Jammu, Jammu & Kashmir 180011, India.
authors.forename: Anita
authors.initials: A
authors.lastname: Singh
authors.affiliation: Department of Environmental Science and Engineering, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India; Amity School of Earth and Environmental Sciences, Amity Education Valley, Gurugram, Haryana 122413, India.
authors.forename: C P
authors.initials: CP
authors.lastname: Kaushik
authors.affiliation: Department of Environmental Science and Engineering, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India; University School of Environment Management, Guru Gobind Singh Indraprastha University, Dwarka, New Delhi 110075, India.
authors.forename: Anubha
authors.initials: A
authors.lastname: Kaushik
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000517:prevention & control; D008697:Methane / Q000032:analysis*; D010084:Oxidation-Reduction; D012037:Refuse Disposal / Q000379:methods*; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology; D013696:Temperature; D064091:Waste Disposal Facilities
chemical_list: D000393:Air Pollutants; D012987:Soil; D008697:Methane
keywords: Biocover; Dumpsite soil; Landfill gases; Methane bio-oxidation; RSM