Search results for " biokinetic coefficients"

showing 3 items of 3 documents

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

2016

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 ni…

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
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Evaluation of biomass activity in membrane bioreactors by means of respirometric techniques

2016

The paper reports the main results of a respirometric experimental survey carried out on several membrane bioreactor pilot plants, characterized by different pilot plant layouts as well as operational conditions. The main aim was to assess the influence of specific conditions on biokinetic/stoichiometric parameters. In particular, the respirometric tests were specifically aimed at investigating the activity of both heterotrophic and autotrophic bacterial species. The achieved results showed that the plant configuration and the features of the feeding wastewater and operational conditions determine significant variation of the kinetic coefficients. The respirometric analysis was confirmed to…

MBRSettore ICAR/03 - Ingegneria Sanitaria-Ambientalerespirometrymathematical modelingbiokinetic coefficientMB-MBRMBR; respirometry; mathematical modeling; biokinetic coefficients; MB-MBR
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Characterization of wastewater and biomass activity in a membrane bioreactor using respirometric techniques

2010

Over the last two decades, Membrane Bioreactors (MBRs) emerged even more for wastewater treatment, ensuring high removal efficiencies as well as very small footprint required. Indeed, in this kind of process, a modification in biomass activity and viability can exist compared to that of a conventional activated sludge (CAS) process. In this context, respirometric analysis represents a reliable tool in order to evaluate the actual biomass kinetic parameters, to insert in mathematical models in the design phase, as well as to monitor the biomass viability, especially when these processes are operated with high sludge retention time (SRT) values. The paper presents some results of respirometri…

Settore ICAR/03 - Ingegneria Sanitaria-AmbientaleRespirometric analysis biokinetic coefficients Membrane Bioreactor (MBR) wastewater treatment Solid Retention Time (SRT) pilot plant experiment
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