Experimental analysis and novel modeling of semi-batch photobioreactors operated with Chlorella vulgaris and fed with 100% (v/v) CO2

Concas, Alessandro; Lutzu, Giovanni Antonio; Pisu, Maria Giuseppina; Cao, Giacomo

doi:10.1016/j.cej.2012.09.119

Cited by 83 publications

(50 citation statements)

References 54 publications

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“…Light restriction is one of the possible reasons which could inhibit the microalgal growth. However, it was negligible in this case since the SS concentrations in this research were lower than other reports using various types of photobioreactors [6,12,13]. Another factor could be carbon dioxide concentration in the aeration.…”

Section: Suspended Solids Microalgae Population and Chlorophyll A Ccontrasting

confidence: 43%

Utilization of Anaerobic Digestion Supernatant as a Nutrient Source in Microalgal Biomass Production with a Membrane Photobioreactor

Noguchi

Hashimoto

Honda

et al. 2017

J. of Wat. & Envir. Tech.

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The green microalgae Chlorella vulgaris, which is known to accumulate valuable substrates, are one of the promising bio-resources. To achieve the mass cultivation of microalgae, anaerobic digestion supernatant was applied as cultivation media in membrane photobioreactor system. In the experiment, the synthesized anaerobic digestion supernatant mimicked from activated sludge collected from an actual wastewater treatment plant in Ishikawa, Japan, was used as cultivation media. In the point of view of nutrient loading, the diluted digestion supernatant satisfied the level for growth. Especially, N/P ratio was 3.8 with high concentration of P, which was previously reported as limiting factor when treated sewage was used as media. Although the maximum biomass productivity (5.58 mg/L/day) was below the previously reported data with treated sewage, the high P concentration in anaerobic digestion supernatant could be utilized as a "supplement" in media.

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Section: Suspended Solids Microalgae Population and Chlorophyll A Ccontrasting

confidence: 43%

Utilization of Anaerobic Digestion Supernatant as a Nutrient Source in Microalgal Biomass Production with a Membrane Photobioreactor

Noguchi

Hashimoto

Honda

et al. 2017

J. of Wat. & Envir. Tech.

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“…Moreover, in microalgal cultures, the hydrogen ion is recognized to be a noncompetitive inhibitor near neutral conditions, while it can limit photosynthetic growth and substrate utilization rates at very low or very high pH levels (Mayo 1997). Furthermore, pH can affect the enzymatic activity of intra-and extracellular carbonic anhydrase, thus influencing the carbon capture mechanism of some microalgal strains (Concas et al 2012). In order to evaluate the dependence of growth rate upon pH, the following expression has been proposed by Mayo (1997):…”

Section: Effects Of Phmentioning

confidence: 99%

“…• Cultivation of microalgae might be coupled with the direct bio-capture of CO 2 emitted by industrial activities that use fossil fuels for energy generation (Concas et al 2012). …”

mentioning

confidence: 99%

Engineering Aspects Related to the Use of Microalgae for Biofuel Production and CO2 Capture from Flue Gases

Concas

Pisu

Cao

2014

Current Environmental Issues and Challenges

Self Cite

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The recent achievements in the field of CO 2 capture and biofuel production through microalgae are presented in this chapter. Specifically, after a brief analysis of the main biological, chemical, and physical phenomena involved in the photosynthetic conversion of CO 2 to biofuels, the current technologies for CO 2 capture, microalgae growth, biomass harvesting, and lipid extraction are critically assessed with a particular focus on the potential exploitation of recent research results at the industrial scale. Finally, future scientific and technological directions for the direct CO 2 capture from flue gases through microalgae are also proposed.

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“…In the majority of previous studies of cultivation of C. vulgaris, the maximum biomass concentration ranged from 800 to 1,200 mg/L [10,11,[16][17][18][19][20][21], although some studies reported much higher concentrations of 1,500 to 12,000 mg/L [22][23][24][25]. However, a range of 800 to 1,200 mg/L can be considered a practically achievable concentration of microalgae in a PBR if we exclude some of the previous cases in which an extremely high biomass concentration was achieved.…”

Section: Optimum Microalgae Concentration In a Membrane Photobioreactormentioning

confidence: 99%

Optimization of Hydraulic Retention Time and Biomass Concentration in Microalgae Biomass Production from Treated Sewage with a Membrane Photobioreactor

Honda

Teraoka

Noguchi

et al. 2017

J. of Wat. & Envir. Tech.

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Treated sewage is a promising source of nitrogen and phosphorus in microalgae biomass production for carbon-neutral biofuel and chemical products. In this study, Chlorella vulgaris was continuously cultivated in membrane photobioreactors (MPBRs) under short hydraulic retention times (HRTs) and with different numbers of submerged membrane modules to investigate potential microalgae productivity when treated sewage was used as a nutrient source. Microalgae biomass concentrations were independent of HRT in MPBRs with one membrane module owing to microalgae biomass deposition on the membrane. Installation of an additional submerged membrane module effectively reduced deposition on the submerged membrane, resulting in increased microalgae biomass concentration and volumetric productivity. Growth kinetics suggested that HRT is the essential parameter influencing the volumetric productivity of microalgae under nutrient-limited conditions, and that optimization of the biomass concentration, which depends on the surface/volume ratio of the photobioreactor and initial light intensity, is critical to maximization of the volumetric productivity under light-limited conditions.

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Experimental analysis and novel modeling of semi-batch photobioreactors operated with Chlorella vulgaris and fed with 100% (v/v) CO2

Cited by 83 publications

References 54 publications

Utilization of Anaerobic Digestion Supernatant as a Nutrient Source in Microalgal Biomass Production with a Membrane Photobioreactor

Utilization of Anaerobic Digestion Supernatant as a Nutrient Source in Microalgal Biomass Production with a Membrane Photobioreactor

Engineering Aspects Related to the Use of Microalgae for Biofuel Production and CO2 Capture from Flue Gases

Optimization of Hydraulic Retention Time and Biomass Concentration in Microalgae Biomass Production from Treated Sewage with a Membrane Photobioreactor

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