The effects of illumination factors on the growth and HCO3− fixation of microalgae in an experiment culture system

Liu, Guangmin; Qiao, Liang; Zhang, Hong; Zhao, Dan; Su, Xudong

doi:10.1016/j.energy.2014.05.043

Cited by 28 publications

(7 citation statements)

References 34 publications

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“…Carbon has been demonstrated to be one of the most important 192 nutrients for the development of microalgae(Liu et al, 2014), and in the final analysis 193 the addition of D-xylose contributes to the C/N balance. A 50% reduction in the nitrate 194 concentration did not negatively affect cell growth, indicating that this N concentration 195 in the medium was not restrictive, and thus, it cannot be considered a deprivation.196 Similar findings have been reported in several studies.…”

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confidence: 99%

Nitrogen balancing and xylose addition enhances growth capacity and protein content in Chlorella minutissima cultures

Freitas

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Matos

et al. 2016

Bioresource Technology

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This study aimed to examine the metabolic changes in Chlorella minutissima cells grown under nitrogen-deficient conditions and with the addition of xylose. The cell density, maximum photochemical efficiency, and chlorophyll and lipid levels were measured. The expression of two photosynthetic proteins, ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and the beta subunit (AtpB) of adenosine triphosphate synthase, were measured. Comparison of cells grown in medium with a 50% reduction in the nitrogen concentration versus the traditional medium solution revealed that the cells grown under nitrogen-deficient conditions exhibited an increased growth rate, higher maximum cell density (12.7×10(6)cellsmL(-1)), optimal PSII efficiency (0.69) and decreased lipid level (25.08%). This study has taken the first steps toward protein detection in Chlorella minutissima, and the results can be used to optimize the culturing of other microalgae.

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confidence: 99%

Nitrogen balancing and xylose addition enhances growth capacity and protein content in Chlorella minutissima cultures

Freitas

Esquível

Matos

et al. 2016

Bioresource Technology

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“…However, the chlorophyll content decreases when the inoculum size increases along with increase in pH. It may be due to the fact that increase in inoculum size causes reduction of H + ions form the medium (Liu et al 2014 ; Chi et al 2011 ).…”

Section: Resultsmentioning

confidence: 99%

Evaluation of photosynthetic efficacy and CO2 removal of microalgae grown in an enriched bicarbonate medium

Abinandan

Shanthakumar

2016

3 Biotech

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Bicarbonate species in the aqueous phase is the primary source for CO2 for the growth of microalgae. The potential of carbon dioxide (CO2) fixation by Chlorella pyrenoidosa in enriched bicarbonate medium was evaluated. In the present study, effects of parameters such as pH, sodium bicarbonate concentration and inoculum size were assessed for the removal of CO2 by C. pyrenoidosa under mixotrophic condition. Central composite design tool from response surface methodology was used to validate statistical methods in order to study the influence of these parameters. The obtained results reveal that the maximum removal of CO2 was attained at pH 8 with sodium bicarbonate concentration of 3.33 g/l, and inoculum size of 30 %. The experimental results were statistically significant with R 2 value of 0.9527 and 0.960 for CO2 removal and accumulation of chlorophyll content, respectively. Among the various interactions, interactive effects between the parameters pH and inoculum size was statistically significant (P < 0.05) for CO2 removal and chlorophyll accumulation. Based on the studies, the application of C. pyrenoidosa as a potential source for carbon dioxide removal at alkaline pH from bicarbonate source is highlighted.

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“…[30] The cultures supplemented with xylose (treatment 4) produced significantly higher biomass and showed maximum productivity (except for treatment 1), followed by cultures supplemented with arabinose (treatment 7) and a combination of xylose and arabinose (treatment 10). Carbon is one of the essential nutrients for the development of microalgae [31] ; thus, addition of D-xylose contributed to the C/N balance in contrast to the effect of low luminous intensities. The turbulent environment of tubular reactors provides greater luminous intensities for the cells, [32] which explains the results obtained in the presence of pentoses.…”

Section: Resultsmentioning

confidence: 99%

Chlorella minutissima grown with xylose and arabinose in tubular photobioreactors: Evaluation of kinetics, carbohydrate production, and protein profile

2021

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Lignocellulosic waste is the most abundant global renewable biomass source and contains significant amounts of pentoses. Thus, pentoses can be considered potential carbon sources for the culture media for microalgae cultivation.The present study aimed to determine whether the addition of D-xylose and Larabinose and lighting variations influence the carbohydrate and protein profiles of Chlorella minutissima grown in tubular photobioreactors. The highest biomass concentration of 1.55 g L −1 was attained by the control cultures exposed to a light intensity of 40.50 μmol m −2 s −1 . The highest carbohydrate accumulation (66.4%) was obtained through the combined use of 40.50 μmol m −2 s −1 light intensity, 19.16 mg L −1 D-xylose, 0.89 mg L −1 L-arabinose, and 0.125 g L −1 KNO 3 . A reduction in luminosity and the addition of pentoses altered the protein profile of Chlorella minutissima. Thus, growth and carbohydrate production can be stimulated by pentoses and adequate luminous intensity. Therefore, Chlorella minutissima can be considered a potential source of biomass for bioethanol production.

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The effects of illumination factors on the growth and HCO3− fixation of microalgae in an experiment culture system

Cited by 28 publications

References 34 publications

Nitrogen balancing and xylose addition enhances growth capacity and protein content in Chlorella minutissima cultures

Nitrogen balancing and xylose addition enhances growth capacity and protein content in Chlorella minutissima cultures

Evaluation of photosynthetic efficacy and CO2 removal of microalgae grown in an enriched bicarbonate medium

Chlorella minutissima grown with xylose and arabinose in tubular photobioreactors: Evaluation of kinetics, carbohydrate production, and protein profile

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