Effects of light quality on the accumulation of oil in a mixed culture of Chlorella sp. and Saccharomyces cerevisiae

Abstract

BACKGROUND: Chlorella strains rather than terrestrial oil crops having higher oil content and shorter generation time have been considered as promising candidates for alternative biodiesel. Since the influence of light quality on oil formation of microalgae in either monoculture or mixed culture has been shown to be either inconsistent or ambiguous, a light-emitting diode (LED) photo-bioreactor with different light sources and intensities was used in this study to investigate a cost-effective lipid production process.

LED Light Spectrum Affects the Photosynthetic Performance of Houttuynia Cordata Seedlings

“…Among environmental conditions, light is a predominant source of energy for plant photosynthesis and also an important signal for plant growth and development [1]. It is known that not only are plants able to respond to the intensity of light but also to its quality (spectrum) or color [2][3][4].…”

Effects of light intensity and wavelength on the production of lactobionic acid from whey by Pseudomonas taetrolens in batch cultures

“…Photo‐bioreactor experiments were conducted in 2.5 L air‐lift bioreactor with a working volume of 2 L containing 2 L of MPYW medium (1 g L −1 malt extract, 5 g L −1 peptone, 2 g L −1 yeast extract, 50 g L −1 whey). LED lights were installed on the bioreactor as explained in our previous work . The batch culture was cultivated at 30 °C for 7 days with an initial pH of 6.5 and run aerobically with 1 vvm.…”

“…Therefore, the wavelength and intensity of the light can affect fermentation results. From our previous studies involving light experiments, it was found that different light intensity and wavelength can effectively enhance the microbial growth and bioconversion ability, thereby improving the fermentation performance . So far, no one has discussed the effect of light on Pseudomonas strains for the production of lactobionic acid from whey.…”

Interspecific biodiversity enhances biomass and lipid productivity of microalgae as biofuel feedstock

“…Trait can be defined either with respect to a genotype or (Stockenreiter, et al 2012) Model of algal community 3 algal species Seawater medium of von Stosch 100 mL culture each (Russell and Fielding 1974) LED light efficiency 2 species mixture Walne's medium 2 L bioreactor (Shu, et al, 2012) Resource stoichiometry 5 algae species WC medium 150 mL culture (Hillebrand and Lehmpfuhl 2011) Biomass accumulation 4 seaweeds or 3 species Seawater 2 months or 3 years (Stachowicz, et al, 2008a) Biomass production 4 algae species Chu growth medium 40 units each with 5 tubes (Weis, et al 2008) Marine productivity 6 algae species Slow release fertilizer Mesocosm and field (Boyer, et al, 2009) Biomass production 3 algae species COMBO growth media 500 mL culture Biomass production 19 algae species Seawater+f/2 medium 7.7 mL culture (Vanelslander, et al, 2009) Biomass production 10 algae species Sterile seawater with nutrient 18 plastic aquaria (Matthiessen, et al, 2010) Biomass stoichiometry 10 algae species WC medium Lab or fields experiments (Striebel, et al, 2009) Net biomass accumulation 10 algae species -Lab or field experiment (Bruno, et al, 2006) Algal assemblage stability 4 seaweeds species -72 plots (Stachowicz, et al, 2008b) Productivity and stabilityNatural water body 3000 samples (Ptacnik, 2008) Algal biofuel assemblage 16 species taxa -119 possible species pairs (Shurin, et al, 2014) to a phenotype, representing an ability to survive in a given environment (Shurin et al 2014). In this study, three Nannochloropsis species were used to create the intraspecific genetic diversity owing to different characteristics such as growth rate, lipid content, chloroplast number, cell shape/size, and carbohydrate catalysis (Andersen et al 1998;Radakovits et al 2012).…”