0000000000452542

AUTHOR

Silvia Greses

showing 4 related works from this author

Microbial community characterization during anaerobic digestion of Scenedesmus spp. under mesophilic and thermophilic conditions

2017

[EN] Microbial communities were thoroughly characterized in a mesophilic anaerobic membrane bioreactor (AnMBR) and a thermophilic continuous stirred tank reactor (CSTR), which were both treating recalcitrant microalgal biomass dominated by Scenedesmus. 16S rRNA amplicon sequencing analysis was performed when the AnMBR achieved 70% algal biodegradation and revealed high microbial diversity, probably due to the high solid retention time (SRT) of the AnMBR configuration. The bacterial community consisted of Chloroflexi (27.9%), WWE1 (19.0%) and Proteobacteria (15.4%) as the major phyla, followed by Spirochaetes (7.7%), Bacteroidetes (5.9%) and Firmicutes (3.6%). These phyla are known to exhibi…

0301 basic medicinebiologyFirmicutesScenedesmus spp.ThermophileMembrane technology010501 environmental sciencesbiology.organism_classification01 natural sciencesMethanogenMethanosaeta03 medical and health sciencesAnaerobic digestion030104 developmental biologyAnaerobic digestionBotanyFood scienceProteobacteriaAgronomy and Crop ScienceMicrobial community analysisScenedesmusTECNOLOGIA DEL MEDIO AMBIENTE0105 earth and related environmental sciencesMesophile
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Effect of long residence time and high temperature over anaerobic biodegradation of Scenedesmus microalgae grown in wastewater

2018

[EN] Anaerobic digestion of indigenous Scenedesmus spp. microalgae was studied in continuous lab-scale anaerobic reactors at different temperatures (35 degrees C and 55 degrees C), and sludge retention time - SRT (50 and 70 days). Mesophilic digestion was performed in a continuous stirred-tank reactor (CSTR) and in an anaerobic membrane bioreactor (AnMBR). Mesophilic CSTR operated at 50 days SRT only achieved 11.9% of anaerobic biodegradability whereas in the AnMBR at 70 days SRT and 50 days HRT reached 39.5%, which is even higher than the biodegradability achieved in the thermophilic CSTR at 50 days SRT (30.4%). Microbial analysis revealed a high abundance of cellulose-degraders in both re…

0301 basic medicineEnvironmental EngineeringFirmicutesMembrane technologyContinuous stirred-tank reactorWastewater010501 environmental sciencesManagement Monitoring Policy and LawScenedesmus spp01 natural sciences03 medical and health sciencesBioreactorsAnaerobic digestionMicroalgaeMicrobial analysisAnaerobiosisWaste Management and DisposalScenedesmusTECNOLOGIA DEL MEDIO AMBIENTE0105 earth and related environmental sciencesSewagebiologyChemistryTemperatureGeneral MedicineBiodegradationbiology.organism_classificationPulp and paper industryBiodegradabilityAnaerobic digestion030104 developmental biologyWastewaterMethanehuman activitiesAnaerobic exerciseScenedesmusMesophile
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AnMBR, reclaimed water and fertigation: Two case studies in Italy and Spain to assess economic and technological feasibility and CO2 emissions within…

2020

[EN] The use of anaerobic membrane bioreactor (AnMBR) technology on urban wastewater can help to alleviate droughts, by reusing the water and nutrients embedded in the effluent in agriculture (fertigation) in line with Circular Economy principles. The combination of AnMBR and fertigation reduces CO2 emissions due to the organic matter valorization and the partial avoidance of mineral fertilizer requirements. However, both AnMBR and fertigation still face technological and regulatory barriers that need to be overcome. These bottlenecks were tackled within the first Innovation Deal approved by the European Commission in 2016, and gave rise to several case studies on water reuse systems. The r…

FertigationINGENIERIA HIDRAULICA020209 energyStrategy and ManagementNutrient recovery and reuseMembrane technology02 engineering and technologyReuseAgricultural water reuseAigua Utilització7. Clean energyIndustrial and Manufacturing EngineeringAnaerobic digestion0202 electrical engineering electronic engineering information engineeringTECNOLOGIA DEL MEDIO AMBIENTE0505 lawGeneral Environmental ScienceRenewable Energy Sustainability and the Environmentbusiness.industry06.- Garantizar la disponibilidad y la gestión sostenible del agua y el saneamiento para todosCircular economySustainability assessment11.- Conseguir que las ciudades y los asentamientos humanos sean inclusivos seguros resilientes y sostenibles05 social sciencesAnaerobiosiReclaimed waterEnvironmental economics6. Clean waterReclaimed water02.- Poner fin al hambre conseguir la seguridad alimentaria y una mejor nutrición y promover la agricultura sostenible12.- Garantizar las pautas de consumo y de producción sosteniblesWastewater13. Climate actionAgriculture050501 criminologyCarbon footprintEnvironmental scienceSewage treatmentbusiness
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Thermophilic anaerobic conversion of raw microalgae: Microbial community diversity in high solids retention systems

2019

[EN] The potential of microbial communities for efficient anaerobic conversion of raw microalgae was evaluated in this work. A long-term operated thermophilic digester was fed with three different Organic Loading Rates (OLR) (0.2, 0.3 and 0.4¿g·L¿1·d¿1) reaching 32¿41% biodegradability values. The microbial community analysis revealed a remarkable presence of microorganisms that exhibit high hydrolytic capabilities such as Thermotogae (~44.5%), Firmicutes (~17.6%) and Dictyoglomi, Aminicenantes, Atribacteria and Planctomycetes (below ~5.5%) phyla. The suggested metabolic role of these phyla highlights the importance of protein hydrolysis and fermentation when only degrading microalgae. The …

0301 basic medicineRenewable energyFirmicutesBioreactor010501 environmental sciences01 natural sciences03 medical and health sciencesAnaerobic digestionMicrobial communityBioreactorMicroalgaeFood scienceTECNOLOGIA DEL MEDIO AMBIENTE0105 earth and related environmental sciencesbiologyChemistryThermophilic digesterArmatimonadetesBiodegradationbiology.organism_classificationAnaerobic digestion030104 developmental biologyMicrobial population biologyFermentation16S rRNA geneAgronomy and Crop Science
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