title: Impact of oxygen injection on CH4 and N2O emissions from rising main sewers.
abstract: Oxygen injection is a commonly used mitigation strategy for sulfide control in sewers. Methane, a potent greenhouse gas, is also produced in sewers. Oxygen injection may reduce methane generation/emission, but could potentially lead to N2O production due to the development of a nitrifying microbial community. The impact of oxygen dosing for sulfide control in sewers on CH4 and N2O production was assessed in this study in laboratory sewer reactors. Results showed that oxygen injection is able to reduce CH4 formation in sewers, although full control of CH4 was not achieved, likely due to partial oxygen penetration into sewer biofilm. The experimental results also revealed a nitrogen loss of around 5 mN/L. However, no significant N2O accumulation was detected.
authors: Advanced Water Management Centre, Building 60, Research Road, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia; LEQUIA, Institute of the Environment, University of Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain. Electronic address: ramon.ganigue@lequia.udg.cat.
authors: Ramon
authors: R
authors: Ganigué
authors: Advanced Water Management Centre, Building 60, Research Road, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia. Electronic address: z.yuan@awmc.uq.edu.au.
authors: Zhiguo
authors: Z
authors: Yuan
mesh_terms: D000393:Air Pollutants / Q000378:metabolism*; D000397:Air Pollution / Q000517:prevention & control*; D000693:Anaerobiosis; D001105:Archaea / Q000187:drug effects / Q000502:physiology*; D018441:Biofilms / Q000187:drug effects*; D017752:Greenhouse Effect / Q000517:prevention & control; D008697:Methane / Q000378:metabolism; D009609:Nitrous Oxide / Q000378:metabolism; D010100:Oxygen / Q000737:chemistry*; D013440:Sulfides / Q000378:metabolism*
chemical_list: D000393:Air Pollutants; D013440:Sulfides; D009609:Nitrous Oxide; D008697:Methane; D010100:Oxygen
keywords: Methane; Methanogen; Nitrous oxide; Oxygen; Sulfide