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RESEARCH PRODUCT

Greenhouse gases from sequential batch membrane bioreactors: A pilot plant case study

Daniele Di TrapaniHallvard ØDegaardClaudia MoriciGiorgio ManninaAlida Cosenza

subject

Environmental EngineeringEnvironmental preservation0208 environmental biotechnologyBiomedical EngineeringBioengineeringSequencing batch reactorWastewater treatment02 engineering and technology010501 environmental sciencesMembrane bioreactor01 natural scienceschemistry.chemical_compoundBioprocess monitoringBioreactor0105 earth and related environmental sciencesSettore ICAR/03 - Ingegneria Sanitaria-AmbientaleChemistryGlobal warming potentialtechnology industry and agricultureEnvironmental engineeringNitrous oxideAnoxic waters020801 environmental engineeringSequencing batch reactorSalinityPilot plantEnvironmental chemistryMembrane bioreactorNitrificationBioprocess monitoring; Environmental preservation; Global warming potential; Membrane bioreactors; Sequencing batch reactor; Wastewater treatment; Biotechnology; Bioengineering; Biomedical Engineering; Environmental EngineeringBiotechnology

description

Abstract The paper reports the results of nitrous oxide (N 2 O) emissions from aerobic and anoxic tank of a Sequential Batch Membrane Bioreactor (SB-MBR) pilot plant. The influence of salinity variation on N 2 O emission was analyzed by gradually increasing the inlet salt concentration from 0 to 10 g NaCl L −1 . The observed results showed that the N 2 O concentration of the gaseous samples was strongly influenced by the salt concentration. This result was likely related to a worsening of the nitrification activity due to the effect of salinity on autotrophic bacteria. Dissolved oxygen concentration and salinity were found to be the key factors affecting N 2 O concentration in the gaseous samples withdrawn from the anoxic tank. Despite the fact that the N 2 O concentration in the anoxic tank was higher than in the aerobic one, it was found that the aerobic tank emitted around 25 times more N 2 O than the anoxic one.

https://doi.org/10.1016/j.bej.2016.04.010