6533b7d0fe1ef96bd125adc0
RESEARCH PRODUCT
Effect of ambient temperature variations on an indigenous microalgae-nitrifying bacteria culture dominated by Chlorella
L. BorrásMaría Victoria RuanoRamón BaratS. AparicioJ. González-camejoJosé Ferrersubject
0106 biological sciencesINGENIERIA HIDRAULICAEnvironmental EngineeringPhotobioreactorNitrifying bacteriaBioengineeringChlorella010501 environmental sciences01 natural sciencesPhotobioreactors010608 biotechnologyMicroalgaeBiomassFood scienceWaste Management and DisposalTECNOLOGIA DEL MEDIO AMBIENTE0105 earth and related environmental sciencesOutdoor TemperatureBacteriabiologyRenewable Energy Sustainability and the EnvironmentChemistryTemperatureAmmonium competitionGeneral Medicinebiology.organism_classificationOutdoor temperatureChlorellaNitrifying bacteriadescription
[EN] Two outdoor photobioreactors were operated to evaluate the effect of variable ambient temperature on an indigenous microalgae-nitrifying bacteria culture dominated by Chlorella. Four experiments were carried out in different seasons, maintaining the temperature-controlled PBR at around 25¿°C (by either heating or cooling), while the temperature in the non-temperature-controlled PBR was allowed to vary with the ambient conditions. Temperatures in the range of 15¿30¿°C had no significant effect on the microalgae cultivation performance. However, when the temperature rose to 30¿35¿°C microalgae viability was significantly reduced. Sudden temperature rises triggered AOB growth in the indigenous microalgae culture, which worsened microalgae performance, especially when AOB activity made the system ammonium-limited. Microalgae activity could be recovered after a short temperature peak over 30¿°C once the temperature dropped, but stopped when the temperature was maintained around 28¿30¿°C for several days.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-10-01 |