Oil production by six microalgae: impact of flocculants and drying on oil recovery from the biomass

Chatsungnoen, Tawan; Chisti, Yusuf

doi:10.1007/s10811-016-0823-6

Cited by 41 publications

(19 citation statements)

References 25 publications

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“…Photoautotrophic cultures are generally known to be less productive than photoheterotrophic and heterotrophic cultures. For example, a maximum biomass concentration of nearly 4 g L −1 was reported for C. vulgaris grown photoautotrophically for 50 days, corresponding to a biomass productivity of around 0.07 g L −1 d −1 . In many other studies, a maximum biomass concentration of less than 1 g L −1 has been reported in photoautotrophic cultures .…”

Section: Resultsmentioning

confidence: 90%

“…At the 25 °C culture temperature used by Chatsungnoen and Chisti, the properties of water were: ρ L = 997.0 kg m −3 and μ L = 8.9 × 10 −4 Pa s. The superficial aeration velocity U G was 43.0 × 10 −5 m s −1 based on an aeration rate of 62.5 × 10 −7 m 3 s −1 , an internal bottle diameter of 0.136 m and a working volume of 1.6 L . Thus, the average shear rate was 69 s −1 .…”

Section: Resultsmentioning

confidence: 99%

“…For comparison with a typical laboratory algal culture system, the shear rate was also calculated for an aerated Duran culture bottle as used by Chatsungnoen and Chisti to grow C. vulgaris to a concentration of nearly 4 g L −1 . An aerated Duran culture bottle is essentially a bubble column and, therefore, the following equation was used:

γ = {(\frac{ρ_{L} g U_{G}}{μ_{L}})}^{0.5}

…”

Section: Resultsmentioning

confidence: 99%

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Effects of shear rate, photoautotrophy and photoheterotrophy on production of biomass and pigments by Chlorella vulgaris

Benavente‐Valdés¹,

Méndez‐Zavala²,

Morales‐Oyervides³

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND: This work compared the production of Chlorella vulgaris biomass and pigments (chlorophylls and carotenoids) in photoautotrophic, photoheterotrophic and two-stage photoheterotrophic-photoautotrophic cultures in two types of photobioreactors, a flat-panel airlift (FPA) and a conventional stirred tank (STR) system. RESULTS: The biomass and pigments productivities of photoheterotrophic and photoheterotrophic-photoautotrophic cultureswere much greater than the productivity of photoautotrophic culture in the FPA. The 3.9-fold higher average shear rate values in the FPA relative to the STR affected the size of the algal cells, but not the final biomass concentration. The two-stage photoheterotrophic-photoautotrophic culture in the FPA had nearly 48% higher biomass productivity than the photoheterotrophic culture in the same device but offered no advantage in terms of production of the pigments. CONCLUSIONS:The FPA and the STR offer very different culture environments which affect an algal culture; a two-stage culture was more productive in biomass than a photoautotrophic culture but not for pigments production.Viscosity of the culture broth max Maximum specific growth rate L Density of the culture broth * Correspondence to: J Montañez,

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

γ = {(\frac{ρ_{L} g U_{G}}{μ_{L}})}^{0.5}

…”

Section: Resultsmentioning

confidence: 99%

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Effects of shear rate, photoautotrophy and photoheterotrophy on production of biomass and pigments by Chlorella vulgaris

Benavente‐Valdés¹,

Méndez‐Zavala²,

Morales‐Oyervides³

et al. 2017

J of Chemical Tech & Biotech

Self Cite

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“…It was reported that alum and alkaline flocculation did not severely affect total lipid content. In an investigation, Chatsungnoen et al [171] found that metal salts such as ferric chloride and aluminum sulfate irreversibly bind to the biomass of Neochloris, Nannochloropsis, and Chlorella, sp. However, these metal coagulants did not significantly impact the biomass and total lipid content.…”

Section: Harvesting Stagementioning

confidence: 99%

Improving ‘Lipid Productivity’ in Microalgae by Bilateral Enhancement of Biomass and Lipid Contents: A Review

Shokravi

Ong

et al. 2020

Sustainability

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Microalgae have received widespread interest owing to their potential in biofuel production. However, economical microalgal biomass production is conditioned by enhancing the lipid accumulation without decreasing growth rate or by increasing both simultaneously. While extensive investigation has been performed on promoting the economic feasibility of microalgal-based biofuel production that aims to increase the productivity of microalgae species, only a handful of them deal with increasing lipid productivity (based on lipid contents and growth rate) in the feedstock production process. The purpose of this review is to provide an overview of the recent advances and novel approaches in promoting lipid productivity (depends on biomass and lipid contents) in feedstock production from strain selection to after-harvesting stages. The current study comprises two parts. In the first part, bilateral improving biomass/lipid production will be investigated in upstream measures, including strain selection, genetic engineering, and cultivation stages. In the second part, the enhancement of lipid productivity will be discussed in the downstream measure included in the harvesting and after-harvesting stages. An integrated approach involving the strategies for increasing lipid productivity in up- and down-stream measures can be a breakthrough approach that would promote the commercialization of market-driven microalgae-derived biofuel production.

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“…Dissolved aluminum or ferric ions form positively charged metal hydroxides that efficiently cause flocculation via charge neutralization or sweeping flocculation, depending on pH and dose [16]. Biomass recovered by flocculation with these metal salts can however have a certain amount of flocculant irreversibly bound to it, which can be a limitation for certain biomass application [17]. Recently, alkaline flocculation mediated by calcite and brucite precipitation at pH 9.5-11 has been described as an interesting flocculation option for several species including Phaeodactylum tricornutum [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Impact of harvesting method on total lipid content and extraction efficiency for Phaeodactylum tricornutum

Vandamme

Gheysen

Muylaert

et al. 2018

Separation and Purification Technology

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Oil production by six microalgae: impact of flocculants and drying on oil recovery from the biomass

Cited by 41 publications

References 25 publications

Effects of shear rate, photoautotrophy and photoheterotrophy on production of biomass and pigments by Chlorella vulgaris

Effects of shear rate, photoautotrophy and photoheterotrophy on production of biomass and pigments by Chlorella vulgaris

Improving ‘Lipid Productivity’ in Microalgae by Bilateral Enhancement of Biomass and Lipid Contents: A Review

Impact of harvesting method on total lipid content and extraction efficiency for Phaeodactylum tricornutum

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