6533b859fe1ef96bd12b83ac

RESEARCH PRODUCT

An innovative respirometric method to assess the autotrophic active fraction: Application to an alternate oxic-anoxic MBR pilot plant

Marco CapodiciFrancesca Di PippoDaniele Di TrapaniSanto Fabio CorsinoMichele Torregrossa

subject

General Chemical Engineering0208 environmental biotechnologyPopulationHeterotrophBiomassMBR systems02 engineering and technology010501 environmental sciencesMembrane bioreactor01 natural sciencesIndustrial and Manufacturing EngineeringRespirometryEnvironmental ChemistryChemical Engineering (all)Autotrophic active fractioneducation0105 earth and related environmental sciencesMBR systemeducation.field_of_studySettore ICAR/03 - Ingegneria Sanitaria-AmbientaleChemistry (all)Environmental engineeringGeneral ChemistryRespirometryAnoxic watersAutotrophic active fraction; Biokinetic coefficients; Intermittent aeration; MBR systems; Respirometry; Chemistry (all); Environmental Chemistry; Chemical Engineering (all); Industrial and Manufacturing Engineering020801 environmental engineeringBiokinetic coefficientIntermittent aerationEnvironmental chemistryEnvironmental scienceNitrificationAerationBiokinetic coefficients

description

An innovative respirometric method was applied to evaluate the autotrophic active fraction in an alternate anoxic/oxic membrane bioreactor (MBR) pilot plant. The alternate cycle (AC) produces a complex microbiological environment that allows the development of both autotrophic and heterotrophic species in one reactor. The present study aimed to evaluate autotrophic and heterotrophic active fractions and highlight the effect of different aeration/non aeration ratios in a AC-MBR pilot plant using respirometry. The results outlined that the autotrophic active fraction values were consistent with the nitrification efficiency and FISH analyses, which suggests its usefulness for estimating the nitrifying population. Intermittent aeration did not significantly affect the heterotrophic metabolic activity but significantly affected the autotrophic biomass development. Finally, the heterotrophic active biomass was strongly affected by the wastewater characteristics, whereas the resultant autotrophic biomass was considerably affected by the duration of the aerated phase. (C) 2016 Elsevier B.V. All rights reserved.

yearjournalcountryeditionlanguage
2016-09-01
10.1016/j.cej.2016.04.134http://hdl.handle.net/10447/215636