title: The role of photoperiods on photobioreactors - A potential strategy to reduce costs.
abstract: The aim of this work was evaluate the role of photoperiods (long-term, frequencies and short) on the growth and lipid content of microalgae Scenedesmus obliquus CPCC05. The results showed that Scenedesmus obliquus can store sufficient energy to sustain cell growth for continuous periods of up to 2h in the dark, without affecting the photosynthetic rate. The values for maximum biomass (9.58mg/Lh) and lipid productivities (2.56mg/Lh) were obtained at photoperiod of 0.91:0.09s (light:dark) and 48 t/d, respectively. Moreover, the best trade-offs between biomass productivity and light energy economy occurred in photoperiods of 0.5:0.5s and 0.91:0.09s (light:dark), and those between lipid productivity and light energy economy occurred in the frequency photoperiod of 24 and 48 t/d. Thus, the use of the photoperiods are an effective strategy for reducing costs of microalgal biomass production.
authors: Department of Food Science and Technology, Federal University of Santa Maria (UFSM), 97105-900 Santa Maria, RS, Brazil.
authors: Mariana Manzoni
authors: MM
authors: Maroneze
authors: Department of Food Science and Technology, Federal University of Santa Maria (UFSM), 97105-900 Santa Maria, RS, Brazil.
authors: Stefania Fortes
authors: SF
authors: Siqueira
authors: Department of Food Science and Technology, Federal University of Santa Maria (UFSM), 97105-900 Santa Maria, RS, Brazil.
authors: Raquel Guidetti
authors: RG
authors: Vendruscolo
authors: Department of Food Science and Technology, Federal University of Santa Maria (UFSM), 97105-900 Santa Maria, RS, Brazil.
authors: Roger
authors: R
authors: Wagner
authors: Department of Food Science and Technology, Federal University of Santa Maria (UFSM), 97105-900 Santa Maria, RS, Brazil.
authors: Cristiano Ragagnin
authors: CR
authors: de Menezes
authors: Department of Food Science and Technology, Federal University of Santa Maria (UFSM), 97105-900 Santa Maria, RS, Brazil.
authors: Leila Queiroz
authors: LQ
authors: Zepka
authors: Department of Food Science and Technology, Federal University of Santa Maria (UFSM), 97105-900 Santa Maria, RS, Brazil. Electronic address: jacoblopes@pq.cnpq.br.
authors: Eduardo
authors: E
authors: Jacob-Lopes
mesh_terms: D018533:Biomass; D058433:Photobioreactors; D017440:Photoperiod; D010788:Photosynthesis / Q000502:physiology*; D010938:Plant Oils / Q000378:metabolism*; D044444:Scenedesmus / Q000502:physiology*
chemical_list: D010938:Plant Oils
keywords: Frequency photoperiod; Light/dark cycle; Long-term photoperiod; Short photoperiods