6533b861fe1ef96bd12c57e2

RESEARCH PRODUCT

Aeration control in membrane bioreactor for sustainable environmental footprint

Taise Ferreira RebouçasAlida CosenzaGiorgio Mannina

subject

0106 biological sciencesEnvironmental EngineeringAeration-based control strategyBioengineeringWastewater010501 environmental sciencesMembrane bioreactorWaste Disposal Fluid01 natural sciencesGreenhouse Gaseschemistry.chemical_compoundBioreactorsAmmonia010608 biotechnologyBioreactorWaste WaterNitriteWaste Management and DisposalOperating cost0105 earth and related environmental sciencesProportion-integration controlSettore ICAR/03 - Ingegneria Sanitaria-AmbientaleRenewable Energy Sustainability and the EnvironmentEnvironmental engineeringGeneral MedicineEnergy consumptionOxygenchemistryGreenhouse gasMembrane bioreactorEnvironmental scienceSewage treatmentAeration

description

In this study different scenarios were scrutinized to minimize the energy consumption of a membrane bioreactor system for wastewater treatment. Open-loop and closed-loop scenarios were investigated by two-step cascade control strategies based on dissolved oxygen, ammonia and nitrite concentrations. An integrated MBR model which includes also the greenhouse gas formation/emission processes was applied. A substantial energy consumption reduction was obtained for the closed-loop scenarios (32% for Scenario 1 and 82% for Scenario 2). The air flow control based on both ammonia and nitrite concentrations within the aerobic reactor (Scenario 2) provided excellent results in terms of reduction of operating cost reduction (64%), direct (10%) and indirect (81%) emissions.

yearjournalcountryeditionlanguage
2020-04-01Bioresource Technology
https://doi.org/10.1016/j.biortech.2020.122734