Greenhouse gas emissions from membrane bioreactors
- Authors: Mannina, G.; Capodici, M.; Cosenza, A.; Di Trapani, D.; van Loosdrecht, M.
- Publication year: 2018
- Type: Capitolo o Saggio (Capitolo o saggio)
- Key words: Global warming, membrane fltration, nitrous oxide, wastewater treatment
Nowadays, it is widely accepted that wastewater treatment plants (WWTPs) are signifcantly contributing to anthropogenic sources of greenhouse gas (GHG) emission. Among the GHGs emitted from WWTPs, nitrous oxide (N2O) has been identifed as the potentially major component, due to its high global warming potential (GWP) which is 298 times higher than that of carbon dioxide (CO2) and also to its capability to react with stratospheric ozone, causing ozone layer depletion. Up until now, most of the experimental investigations aimed at assessing the key mechanisms of N2O formation and the operational conditions that can enhance its emission, have been carried out on conventional activated sludge (CAS) processes, while the knowledge of N2O emission from advanced technologies such as membrane bioreactors (MBRs) is still very limited. Moreover, the specifc peculiarities of MBRs might hamper the direct transferability of data measured