6533b856fe1ef96bd12b2786

RESEARCH PRODUCT

Solids and Hydraulic Retention Time Effect on N2O Emission from Moving-Bed Membrane Bioreactors

George A. EkamaMarco CapodiciAlida CosenzaGiorgio ManninaDaniele Di Trapani

subject

Petroleum engineeringHydraulic retention timeBiological nutrient removalSettore ICAR/03 - Ingegneria Sanitaria-AmbientaleChemistryGeneral Chemical Engineering0208 environmental biotechnologyN2OChemistry (all)02 engineering and technologyGeneral Chemistry010501 environmental sciences01 natural sciencesIndustrial and Manufacturing Engineering020801 environmental engineeringMembraneSolids retention timeBioreactorIntegrated fixed-film activated-sludge membrane bioreactorChemical Engineering (all)Moving bedHydraulic retention time0105 earth and related environmental sciences

description

Biological nutrient removal was operated at different solids (SRT) and hydraulic retention times (HRT) in order to assess their influence on nitrous oxide (N2O) emission from a hybrid moving-bed membrane bioreactor. The observed results show that the N2O production decreased when the SRT/HRT was decreased. The maximum N2O gaseous concentration was measured in the aerobic reactor at the end of phase I, and it decreased through phases II and III. From mass balances over the reactors of the system, the aerated (aerobic and membrane) reactors were the largest producers of N2O, showing that the greater part of N2O was produced during the nitrification process.

yearjournalcountryeditionlanguage
2018-05-03
10.1002/ceat.201700377http://hdl.handle.net/10447/325913