Search results for "Photobioreactors"

showing 4 items of 14 documents

Nitrite inhibition of microalgae induced by the competition between microalgae and nitrifying bacteria

2020

[EN] Outdoor microalgae cultivation systems treating anaerobic membrane bioreactor (AnMBR) effluents usually present ammonium oxidising bacteria (AOB) competition with microalgae for ammonium uptake, which can cause nitrite accumulation. In literature, nitrite effects over microalgae have shown controversial results. The present study evaluates the nitrite inhibition role in a microalgae-nitrifying bacteria culture. For this purpose, pilot- and lab-scale assays were carried out. During the continuous outdoor operation of the membrane photobioreactor (MPBR) plant, biomass retention time (BRT) of 2 d favoured AOB activity, which caused nitrite accumulation. This nitrite was confirmed to inhib…

INGENIERIA HIDRAULICAEnvironmental EngineeringNitrite0208 environmental biotechnologyPhotobioreactorchemistry.chemical_element02 engineering and technologyMicroorganismes010501 environmental sciencesWastewater01 natural sciencesPhotobioreactorschemistry.chemical_compoundBioreactorsNitrateMicroalgaeAmmoniumFood scienceAmmonium oxidising bacteriaNitriteWaste Management and DisposalEffluentNitritesTECNOLOGIA DEL MEDIO AMBIENTE0105 earth and related environmental sciencesWater Science and TechnologyCivil and Structural EngineeringBacteriabiologyChemistryOutdoor06.- Garantizar la disponibilidad y la gestión sostenible del agua y el saneamiento para todosEcological ModelingBacteris nitrificantsbiology.organism_classificationNitrificationPollutionNitrogen020801 environmental engineeringNitrifying bacteriaNitrificationOxidation-ReductionAigües residuals Depuració
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Kinetic modeling of autotrophic microalgae mainline processes for sewage treatment in phosphorus-replete and -deplete culture conditions

2021

[EN] A kinetic model of autotrophic microalgal growth in sewage was developed to determine the biokinetic processes involved, including carbon-, nitrogen- and phosphorus-limited microalgal growth, dependence on light intensity, temperature and pH, light attenuation and gas exchange to the atmosphere. A new feature was the differentiation between two metabolic pathways of phosphorus consumption according to the availability of extracellular phosphorus. Two scenarios were differentiated: phosphorus-replete and -deplete culture conditions. In the former, the microalgae absorbed phosphorus to grow and store polyphosphate. In the latter the microalgae used the stored polyphosphate as a phosphoru…

INGENIERIA HIDRAULICAEnvironmental EngineeringNitrogenBiomassPhotobioreactorchemistry.chemical_elementWastewaterNutrients removalPhotobioreactorsMathematical modelMicroalgaeEnvironmental ChemistryOrganic matterBiomassWaste Management and DisposalTECNOLOGIA DEL MEDIO AMBIENTEchemistry.chemical_classificationSewage06.- Garantizar la disponibilidad y la gestión sostenible del agua y el saneamiento para todosPhosphorusPhosphorusPulp and paper industryPollutionPhosphorus storageLight intensityWastewaterchemistryEnvironmental scienceSewage treatmentEutrophication
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Wastewater nutrient removal in a mixed microalgae-bacteria culture: effect of light and temperature on the microalgae-bacteria competition.

2018

[EN] The aim of this study was to evaluate the effect of light intensity and temperature on nutrient removal and biomass productivity in a microalgae¿bacteria culture and their effects on the microalgae¿bacteria competition. Three experiments were carried out at constant temperature and various light intensities: 40, 85 and 125¿µE¿m¿2¿s¿1. Other two experiments were carried out at variable temperatures: 23¿±¿2°C and 28¿±¿2°C at light intensity of 85 and 125¿µE¿m¿2¿s¿1, respectively. The photobioreactor was fed by the effluent from an anaerobic membrane bioreactor. High nitrogen and phosphorus removal efficiencies (about 99%) were achieved under the following operating conditions: 85¿125¿µE¿…

INGENIERIA HIDRAULICALightNitrogen0208 environmental biotechnologyPhotobioreactor02 engineering and technologyChlorella010501 environmental sciencesBiologyWastewater01 natural sciencesWaste Disposal Fluidchemistry.chemical_compoundPhotobioreactorsNitrateNutrient removalBioreactorMicroalgaeEnvironmental ChemistryWaste Management and DisposalEffluentTECNOLOGIA DEL MEDIO AMBIENTE0105 earth and related environmental sciencesWater Science and TechnologyBacteriaEnvironmental engineeringTemperaturePhosphorusGeneral Medicinebiology.organism_classificationPulp and paper industryBacteria competition020801 environmental engineeringLight intensityAnaerobic digestionchemistryNitrifying bacteriaNitrificationEnvironmental technology
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Mixotrophy in a Local Strain of Nannochloropsis granulata for Renewable High-Value Biomass Production on the West Coast of Sweden

2022

A local strain of Nannochloropsis granulata (Ng) has been reported as the most productive microalgal strain in terms of both biomass yield and lipid content when cultivated in photobioreactors that simulate the light and temperature conditions during the summer on the west coast of Sweden. To further increase the biomass and the biotechnological potential of this strain in these conditions, mixotrophic growth (i.e., the simultaneous use of photosynthesis and respiration) with glycerol as an external carbon source was investigated in this study and compared with phototrophic growth that made use of air enriched with 1–2% CO2. The addition of either glycerol or CO2-enriched air stimulated the…

antitumoral activitymicroalgaecarotenoidsPharmaceutical SciencemetabolomicsphotobioreactorsmixotrophyDrug DiscoveryNannochloropsisPharmacology Toxicology and Pharmaceutics (miscellaneous)bioassay analysiscell death pathwaypolyunsaturated fatty acids<i>Nannochloropsis</i>; mixotrophy; photobioreactors; CHN analysis; carotenoids; polyunsaturated fatty acids; metabolomics; bioassay; cell death pathway; autophagy; antitumoral activityMarine Drugs; Volume 20; Issue 7; Pages: 424
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