6533b7d3fe1ef96bd1261517
RESEARCH PRODUCT
Assessment of cross-flow filtration as microalgae harvesting technique prior to anaerobic digestion: Evaluation of biomass integrity and energy demand
José FerrerA. BouzasAurora SecoHélène CarrèreJuan Bautista GiménezJean-philippe Steyersubject
filtration tangentielleEnvironmental Engineering020209 energymedia_common.quotation_subject[SDV]Life Sciences [q-bio]Anaerobic biodegradabilitydigestion anaérobieBiomassBioengineering02 engineering and technologyChlorellaEnergy balance010501 environmental sciences7. Clean energy01 natural sciencesAgricultural economicsValencianbilan énergétiqueintégrité cellulaireRegional developmentGratitude0202 electrical engineering electronic engineering information engineeringMicroalgaeHarvestingAnaerobiosisBiomassWaste Management and DisposalTECNOLOGIA DEL MEDIO AMBIENTE0105 earth and related environmental sciencesmedia_commonbioénergiemicro-algueEnergy demandRenewable Energy Sustainability and the EnvironmentCross-flow filtrationGeneral MedicinebiogazMicroalgae integritylanguage.human_languageAnaerobic digestionWork (electrical)13. Climate actionBiofuelscross-flow filtration;harvesting;microalgae integrity;anaerobic biodegradability;energy balance[SDE]Environmental ScienceslanguageChristian ministryBusinessFiltrationdescription
[EN] In the present study, the effect of cross-flow filtration (CFF) on the overall valorization of Chlorella spp. microalgae as biogas was assessed. The effect of CFF on microalgae cell integrity was quantified in terms of viability which was correlated with the anaerobic biodegradability. The viability dropped as the biomass concentration increased, whereas anaerobic biodegradability increased linearly with the viability reduction. It was hypothesized that a stress-induced release and further accumulation of organic polymers during CFF increased the flux resistance which promoted harsher shear-stress conditions. Furthermore, the volume reduction as the concentration increased entailed an increase in the specific energy supply to the biomass. The energy demand was positive in the whole range of concentrations studied, yielding an overall energy efficiency as high as 22.9% for the highest concentration studied. Specifically, heat requirements were lower than electricity requirements only when the biomass concentrations exceeded 10 g COD.L-1.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-12-01 |