Print Email Facebook Twitter Greenhouse gas emissions from membrane bioreactors: analysis of a two-year survey on different MBR configurations Title Greenhouse gas emissions from membrane bioreactors: analysis of a two-year survey on different MBR configurations Author Mannina, Giorgio (Università degli Studi di Palermo; Columbia University) Chandran, Kartik (Columbia University) Capodici, Marco (Università degli Studi di Palermo) Cosenza, Alida (Università degli Studi di Palermo) Di Trapani, Daniele (Università degli Studi di Palermo) van Loosdrecht, Mark C.M. (TU Delft BT/Environmental Biotechnology) Date 2018 Abstract This study aimed at evaluating the nitrous oxide (N2O) emissions from membrane bioreactors (MBRs) for wastewater treatment. The study investigated the N2O emissions considering multiple influential factors over a two-year period: (i) different MBR based process configurations; (ii) wastewater composition (municipal or industrial); (iii) operational conditions (i.e. sludge retention time, carbon-to-nitrogen ratio, C/N, hydraulic retention time); (iv) membrane modules. Among the overall analysed configurations, the highest N2O emission occurred from the aerated reactors. The treatment of industrial wastewater, contaminated with salt and hydrocarbons, provided the highest N2O emission factor (EF): 16% of the influent nitrogen for the denitrification/nitrification-MBR plant. The lowest N2O emission (EF = 0.5% of the influent nitrogen) was obtained in the biological phosphorus removal-moving bed-MBR plant likely due to an improvement in biological performances exerted by the co-presence of both suspended and attached biomass. The influent C/N ratio has been identified as a key factor affecting the N2O production. Indeed, a decrease of the C/N ratio (from 10 to 2) promoted the increase of N2O emissions in both gaseous and dissolved phases, mainly related to a decreased efficiency of the denitrification processes. Subject global warmingMBRnitrous oxide emissionwastewater treatment To reference this document use: http://resolver.tudelft.nl/uuid:aae5366c-2986-4dfe-b3f3-ad319c73d1c6 DOI https://doi.org/10.2166/wst.2018.366 ISSN 0273-1223 Source Water Science and Technology, 78 (4), 896-903 Part of collection Institutional Repository Document type journal article Rights © 2018 Giorgio Mannina, Kartik Chandran, Marco Capodici, Alida Cosenza, Daniele Di Trapani, Mark C.M. van Loosdrecht Files PDF wst078040896.pdf 530.56 KB Close viewer /islandora/object/uuid:aae5366c-2986-4dfe-b3f3-ad319c73d1c6/datastream/OBJ/view