6533b7d8fe1ef96bd1269aff
RESEARCH PRODUCT
Nitrous oxide emissions in a membrane bioreactor treating saline wastewater contaminated by hydrocarbons
Claudia MoriciGiorgio ManninaDaniele Di TrapaniHallvard ØDegaardAlida CosenzaVito Armando Laudicinasubject
inorganic chemicalsSalinityEnvironmental Engineering0208 environmental biotechnologyBiomassBioengineering02 engineering and technology010501 environmental sciencesSodium ChlorideWastewaterMembrane bioreactor01 natural sciencesWaste Disposal FluidEnvironmental protectionGreenhouse gas emissionchemistry.chemical_compoundBioreactorsBiomassWaste Management and Disposal0105 earth and related environmental scienceschemistry.chemical_classificationNitrous oxideSettore ICAR/03 - Ingegneria Sanitaria-AmbientaleRenewable Energy Sustainability and the EnvironmentChemistryEnvironmental engineeringGeneral MedicineNitrous oxideequipment and suppliesHydrocarbons020801 environmental engineeringSalinity and hydrocarbonSalinityHydrocarbonPilot plantBiodegradation EnvironmentalWastewaterEnvironmental chemistryMembrane bioreactorAerationWater Pollutants ChemicalEnvironmental protection; Greenhouse gas emissions; Membrane bioreactors; Nitrous oxide; Salinity and hydrocarbon; Bioengineering; Environmental Engineering; Waste Management and Disposaldescription
The joint effect of wastewater salinity and hydrocarbons on nitrous oxide emission was investigated. The membrane bioreactor pilot plant was operated with two phases: i. biomass acclimation by increasing salinity from 10 gNaCl L−1 to 20 gNaCl L−1 (Phase I); ii. hydrocarbons dosing at 20 mg L−1 with a constant salt concentration of 20 gNaCl L−1 (Phase II). The Phase I revealed a relationship between nitrous oxide emissions and salinity. During the end of the Phase I, the activity of nitrifiers started to recover, indicating a partial acclimatization. During the Phase II, the hydrocarbon shock induced a temporary inhibition of the biomass with the suppression of nitrous oxide emissions. The results revealed that the oxic tank was the major source of nitrous oxide emission, likely due to the gas stripping by aeration. The joint effect of salinity and hydrocarbons was found to be crucial for the production of nitrous oxide
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-01-01 |