Influence of irradiance, dissolved oxygen concentration, and temperature on the growth of Chlorella sorokiniana

Ugwu, Charles U.; Aoyagi, Haruhiko; Uchiyama, Hiroo

doi:10.1007/s11099-007-0052-y

Cited by 127 publications

(75 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For instance, when DO was elevated to a level higher than 13 mg/L, the final biomass concentration was substantially reduced in culture of Chlorella sorokiniana (Ugwu et al 2007), while cell death occurred only when DO reached 36 mg/L for Spirulina platensis Vonshak et al (1996). It is interesting that Euhalothece sp.…”

Section: Discussionmentioning

confidence: 99%

Plastic bag as horizontal photobioreactor on rocking platform driven by water power for culture of alkalihalophilic cyanobacterium

Zhu

Cheng

et al. 2017

Bioresour. Bioprocess.

View full text Add to dashboard Cite

Background: Mixing in traditional algae culture system consumes intensive electricity. This should be replaced by nature force to reduce energy cost and, more importantly, to realize positive energy balance of algal biofuel production. This study aims to develop a horizontal photobioreactor, in which mixing can be provided with rocking movement driven by nature force.Results: Simple boxes were used as small-scale horizontal photobioreactors on a rocking platform for culture of alkalihalophilic Euhalothece sp. ZM001. There was no CO 2 gas bubbling since 1.0 M NaHCO 3 supplied sufficient inorganic carbon in it. Effect of culture depth, rocking cycle, and light intensity to algal biomass production, pH change, and DO accumulation were investigated in this system. Biomass concentration of 2.73 g/L was achieved in culture with 2.5 cm depth, and maximum productivity of 17.06 g/m 2 /day was obtained in culture with 10 cm depth. k L a in PBR with different culture depths and rocking cycles was measured, and it was from 0.57 to 33.49 h −1, showing great variation. To test this system at large scale, a plastic bag with a surface area of 1 m 2 was placed on a rocking platform driven by water power, and it resulted in a biomass concentration of 1.88 g/L. Conclusion: These results proved feasibility of a novel photobioreactor system driven by nature force, as well as low cost of manufacturing, and easy scaling-up.

show abstract

Section: Discussionmentioning

confidence: 99%

Plastic bag as horizontal photobioreactor on rocking platform driven by water power for culture of alkalihalophilic cyanobacterium

Zhu

Cheng

et al. 2017

Bioresour. Bioprocess.

View full text Add to dashboard Cite

show abstract

“…However, the experimental design and cultivation conditions in the current study were quite different from the conditions applied in the studies mentioned above (e.g., continuous light (de Bashan et al 2008;Li et al 2011;Park et al 2011b), higher temperature (de Bashan et al 2008;Li et al 2011;Wang et al 2010), and CO 2 injections (Bjornsson et al 2013;Li et al 2011). Some C. sorokiniana species (e.g., CCAP 211/8K the equivalent of UTEX 1230 strain) demonstrated improved performance at elevated temperatures (max at 35-38°C), high light intensity (max at 8000 μmol photons m −2 s −1 ), and CO 2 content (max at 5 % CO 2 ) (Cuaresma Franco et al 2011;Morita et al 2000;Ugwu et al 2007). In addition, algal growth in the current study may be limited by the availability of certain nutrients or light penetration (coming from the top only) (Fig.…”

Section: Discussionmentioning

confidence: 99%

Bioprospecting of microalgae for integrated biomass production and phytoremediation of unsterilized wastewater and anaerobic digestion centrate

Bohutskyi

Liu

Nasr

et al. 2015

Appl Microbiol Biotechnol

111

View full text Add to dashboard Cite

Eighteen microalgae, including two local isolates, were evaluated for their ability to grow and remove nutrients from unsterilized primary or secondary wastewater effluents as well as wastewater supplemented with nutrient-rich anaerobic digester centrate (ADC). Most of the tested species except several phylogenetically clustered Chlorella sorokiniana including local isolates and Scenedesmus strains were unable to grow efficiently. This may reflect the presence of certain genetic traits important for robust growth in the unsterilized wastewater. The maximum algal-specific growth rates and biomass density obtained in these bacterial-contaminated cultures were in the range of 0.8-1 day(-1) and 250-350 mg L(-1), respectively. ADC supplementation was especially helpful to biologically treated secondary effluent with its lower initial macronutrient and micronutrient content. As a result of algal growth, total nitrogen and orthophosphate levels were reduced by as much as 90 and 70 %, respectively. Biological assimilation was estimated to be the main mechanism of nitrogen removal in primary and secondary effluents with ammonia volatilization and bacterial nitrification-denitrification contributing for cultures supplemented with ADC. Assimilation by algae served as the principal mechanism of orthophosphate remediation in secondary wastewater cultures, while chemical precipitation appeared also to be important for orthophosphate removal in primary wastewater. Overall, cultivation of microalgae in primary and primary + 5 % ADC may be more favorable from an economical and sustainability perspective due to elimination of the costly and energy-intensive biological treatment step. These findings demonstrate that unsterilized wastewater and ADC can serve as critical nutrient sources for biomass generation and that robust microalgae can be potent players in wastewater phytoremediation.

show abstract

“…The compounds that are produced in the light-dependent phase (ATP, NADPH) are used in the dark phase to synthesize metabolic molecules essential for growth. Also, it has been reported that some enzymes of the pentose cycle of photosynthesis and CO 2 fixation are inactive during illumination (Bouterfas et al 2006;Ugwu et al 2007).…”

Section: Discussionmentioning

confidence: 99%

Effect of light intensity and photoperiod on biomass and fatty acid composition of the microalgae, Chlorella vulgaris

2011

View full text Add to dashboard Cite

The effects of irradiance and photoperiod on the biomass and fatty acid (FA) composition of Chlorella vulgaris were examined in the exponential growth phase. Results indicated significant differences in biomass and FA at different intensities and photoperiods. Maximum biomass (2.05 ± 0.1 g l -1 ) was at 62.5 lmol photons m -2 s -1 and 16:8 h light/dark photoperiod. FA composition changed considerably in different light regimes; the maximum percentage of total saturated (SFA) (33.38%) was recorded at 100 lmol photons m -2 s -1 and 16:8 h photoperiod, while monounsaturated (MUFA) and polyunsaturated (PUFA) fatty acids decreased with increasing irradiance and light duration. The maximum percentage of total MUFA (15.93%) and PUFA (27.40%) was recorded at 37.5 lmol photons m -2 s -1 and 8:16 h photoperiod.

show abstract

Influence of irradiance, dissolved oxygen concentration, and temperature on the growth of Chlorella sorokiniana

Cited by 127 publications

References 15 publications

Plastic bag as horizontal photobioreactor on rocking platform driven by water power for culture of alkalihalophilic cyanobacterium

Plastic bag as horizontal photobioreactor on rocking platform driven by water power for culture of alkalihalophilic cyanobacterium

Bioprospecting of microalgae for integrated biomass production and phytoremediation of unsterilized wastewater and anaerobic digestion centrate

Effect of light intensity and photoperiod on biomass and fatty acid composition of the microalgae, Chlorella vulgaris

Contact Info

Product

Resources

About