Spectral conversion of light for enhanced microalgae growth rates and photosynthetic pigment production

Mohsenpour, Seyedeh Fatemeh; Richards, Bryce S.; Willoughby, Nicholas

doi:10.1016/j.biortech.2012.08.072

Cited by 139 publications

(63 citation statements)

References 20 publications

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“…Luminescence from Eu 2 þ -doped materials typically occurs in a relatively broad band, which ranges from green-blue to yelloworange, but typically does not extend far into the red. On the other hand, conversion of green light to red would be highly desirable 20,21 to further activate green algal chloroplasts in environments with intermediate or low solar irradiation intensity, alternatively or additively to biotechnological or biomolecular approaches 22 . For this purpose, the emission spectrum of Eu 2 þ has to be pushed rather far into the red while simultaneously ensuring efficient excitation in the green.…”

Section: Photoluminescent Converter Materialmentioning

confidence: 99%

Solar spectral conversion for improving the photosynthetic activity in algae reactors

et al. 2013

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Sustainable biomass production is expected to be one of the major supporting pillars for future energy supply, as well as for renewable material provision. Algal beds represent an exciting resource for biomass/biofuel, fine chemicals and CO 2 storage. Similar to other solar energy harvesting techniques, the efficiency of algal photosynthesis depends on the spectral overlap between solar irradiation and chloroplast absorption. Here we demonstrate that spectral conversion can be employed to significantly improve biomass growth and oxygen production rate in closed-cycle algae reactors. For this purpose, we adapt a photoluminescent phosphor of the type Ca 0.59 Sr 0.40 Eu 0.01 S, which enables efficient conversion of the green part of the incoming spectrum into red light to better match the Q y peak of chlorophyll b. Integration of a Ca 0.59 Sr 0.40 Eu 0.01 S backlight converter into a flat panel algae reactor filled with Haematococcus pluvialis as a model species results in significantly increased photosynthetic activity and algae reproduction rate.

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Section: Photoluminescent Converter Materialmentioning

confidence: 99%

Solar spectral conversion for improving the photosynthetic activity in algae reactors

et al. 2013

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“…The biomass productivity (P) (g L -1 day -1 ), described the rate of generation of biomass during microalgae growth, was calculated using Eq. (2) [17,18]:…”

Section: Methodsmentioning

confidence: 99%

“…The specific growth rate (l day -1 ), mainly considered in exponential phase, is defined as the increase in the number of cells or biomass concentration per-unit time and calculated using the following equation [16,17]:…”

Section: Methodsmentioning

confidence: 99%

Biological CO2 fixation using Chlorella vulgaris and its thermal characteristics through thermogravimetric analysis

Razzak

Ali

Hossain

et al. 2016

Bioprocess Biosyst Eng

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The present research is focused on cultivation of microalgae strain Chlorella vulgaris for bio-fixation of CO2 coupled with biomass production. In this regard, a single semi-batch vertical tubular photobioreactor and four similar photobioreactors in series have been employed. The concentration of CO2 in the feed stream was varied from 2 to 12 % (v/v) by adjusting CO2 to air ratio. The amount of CO2 capture and algae growth were monitored by measuring decrease of CO2 concentration in the gas phase, microalgal cell density, and algal biomass production rate. The results show that 4 % CO2 gives maximum amount of biomass (0.9 g L(-1)) and productivity (0.118 g L(-1) day(-1)) of C. vulgaris in a single reactor. In series reactors, average productivity per reactor found to be 0.078 g L(-1) day(-1). The maximum CO2 uptake for single reactor also found with 4 % CO2, and it is around 0.2 g L(-1) day(-1). In series reactors, average CO2 uptake is 0.13 g L(-1) day(-1) per reactor. TOC analysis shows that the carbon content of the produced biomass is around 40.67 % of total weight. The thermochemical characteristics of the cultivated C. vulgaris samples were analyzed in the presence of air. All samples burn above 200 °C and the combustion rate become faster at around 600 °C. Almost 98 wt% of the produced biomass is combustible in this range.

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“…Under broad spectrum illumination, the optimal emission spectra of the dye to achieve enhanced growth rates is dependent on the algal pigments present [89,90]. A number of studies using photoluminescence to shift UV light into the PAR region have demonstrated improvements in growth rates [91], and up to 10% increase in biomass productivity [92,93].…”

Section: Photoluminescence (Pl)mentioning

confidence: 99%

Spectral light management for solar energy conversion systems

2016

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Due to the inherent broadband nature of the solar radiation, combined with the narrow spectral sensitivity range of direct solar to electricity devices, there is a massive opportunity to manipulate the solar spectrum to increase the functionality and efficiency of solar energy conversion devices. Spectral splitting or manipulation facilitates the efficient combination of both high-temperature solar thermal systems, which can absorb over the entire solar spectrum to create heat, and photovoltaic cells, which only convert a range of wavelengths to electricity. It has only recently been possible, with the development of nanofabrication techniques, to integrate micro-and nano-photonic structures as spectrum splitters/manipulators into solar energy conversion devices. In this paper, we summarize the recent developments in beam splitting techniques, and highlight some relevant applications including combined PV-thermal collectors and efficient algae production, and suggest paths for future development in this field.

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Spectral conversion of light for enhanced microalgae growth rates and photosynthetic pigment production

Cited by 139 publications

References 20 publications

Solar spectral conversion for improving the photosynthetic activity in algae reactors

Solar spectral conversion for improving the photosynthetic activity in algae reactors

Biological CO2 fixation using Chlorella vulgaris and its thermal characteristics through thermogravimetric analysis

Spectral light management for solar energy conversion systems

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