Microalgae Cultivation and Photobioreactor Design

Lu, Qian; Han, Pei; Li, Jingjing

doi:10.1016/b978-0-12-817536-1.00003-5

Cited by 19 publications

(11 citation statements)

References 97 publications

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“…It is well proved that the growth conditions (including; light, carbon source, nutrients, temperature, pH, etc.) affect the composition and the characteristics of microalgae [23]. Therefore, it is generally recommended to grow different microalgae species under similar conditions for accurate comparison.…”

Section: Introductionmentioning

confidence: 99%

Chlamydomonas reinhardtii Is a Potential Food Supplement with the Capacity to Outperform Chlorella and Spirulina

et al. 2020

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Chlamydomonas reinhardtii is a green microalgae used as a model organism associated with biotechnological applications, yet its nutritional value has not been assessed. This study investigates the nutritional capacity of C. reinhardtii as an additional value for this species beyond its known potential in biofuels and bio-products production. The composition of key nutrients in C. reinhardtii was compared with Chlorella and Spirulina, the species widely regarded as a superfood. The results revealed that the protein content of C. reinhardtii (46.9%) was comparable with that of Chlorella (45.3) and Spirulina (50.4%) on a dry weight basis. C. reinhardtii contained all the essential amino acids with good scores based on FAO/WHO values (0.9–1.9) as in Chlorella and Spirulina. Unsaturated fatty acids predominated the total fatty acids profile of C. reinhardtii were ~74 of which ~48% are n-3 fatty acids. Alpha-linolenic acid (ALA) content in C. reinhardtii (42.4%) was significantly higher than that of Chlorella (23.4) and Spirulina (0.12%). For minerals, Spirulina was rich in iron (3.73 mg/g DW) followed by Chlorella (1.34 mg/g DW) and C. reinhardtii (0.96 mg/g DW). C. reinhardtii, unlike the other two species, consisted of selenium (10 µg/g DW), and had a remarkably lower heavy metal load. Moreover, C. reinhardtii contained relatively high concentrations of chlorophyll (a + b) and total carotenoids (28.6 mg/g DW and 6.9 mg/g DW, respectively) compared with Chlorella (12.0 mg/g DW and 1.8 mg/g DW, respectively) and Spirulina (8.6 mg/g DW and 0.8 mg/g DW, respectively). This study confirms that, based on its nutrient credentials, C. reinhardtii has great potential as a new superfood or ingredient for a food supplement.

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Section: Introductionmentioning

confidence: 99%

Chlamydomonas reinhardtii Is a Potential Food Supplement with the Capacity to Outperform Chlorella and Spirulina

et al. 2020

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“…A previous study reported the negative effect of osmotic stress on mixotrophic cultivation of other microalgae (Ryu et al, 2020). Osmotic stress can inhibit microalgae growth and alter gene expression (Zhou et al, 2020;Chuang and Liao, 2021). Therefore the organic carbon sources directly available to B. sudetica KNUA107 might have been limited due to osmotic stress (Yeesang and Cheirsilp, 2014).…”

Section: Algal Growth and Biomass Productionmentioning

confidence: 99%

Enhancement of Biomass Production in Colony-Forming Green Algae, Botryosphaerella sudetica, Under Mixotrophic Cultivation

2021

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In this study, we characterized the potential of colony-forming green algae, Botryosphaerella sudetica KNUA107, isolated from Ulleung Island, South Korea, as a bioresource and analyzed the effects of mixotrophic cultivation on its bioresource production efficiency. Internal transcribed spacer (ITS) (ITS1, 5.8S, and ITS2), ribulose bisphosphate carboxylase large subunit (rbcL), and elongation factor Tu (tufa) regions were used for molecular identification and phylogenetic analysis. B. sudetica KNUA107 had a strong relationship with the green algae of Botryococcus and Botryosphaerella genera, which are colony-forming species, and was also associated with members of the Neochloris genus. To improve biomass productivity, we tested mixotrophic cultivation conditions using several organic carbon sources. Glucose supplementation stimulated B. sudetica KNUA107 growth and reduced the time needed to reach the stationary phase. In addition, the colony size was 1.5–2.0 times larger with glucose than in photoautotrophic cultures, and settleability improved in proportion to colony size. The total lipid content and biomass productivity were also higher in cultures supplemented with glucose. Among the lipid components, saturated fatty acids and monounsaturated fatty acids had the highest proportion. Our study suggests that B. sudetica KNUA107, which has enhanced efficiency in biomass production and lipid components under mixotrophic cultivation, has high potential as a bioresource.

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“…Um dos elementos nutricionais essenciais é o carbono (C) por estar presente nas proteínas, lipídios e carboidratos e a sua falta limitar tanto o crescimento das microalgas quanto o acúmulo dessas substâncias nas células microalgais, sendo fundamental o seu fornecimento (Zhou, Lu, Han & Li, 2020). Fonte de carbono inorgânico como dióxido de carbono (CO2) é usualmente utilizada por este gás estar presente no ar, mas outras fontes, como bicarbonato, também são usadas.…”

Section: Principais Nutrientesunclassified

“…O fósforo (P) é outro elemento importante para o metabolismo das microalgas, apesar de estar presente em menores quantidades na biomassa (Zhou et al, 2020). Geralmente podem ser consumidos como fósforo inorgânico (como íon fosfato, dihidrogenofosfato e hidrogenofosfato) e são imprescindíveis na síntese de fosfolipídios, ácidos nucleicos e fosfatos de éster de microalgas (Dyhrman et al, 2016).…”

Section: Principais Nutrientesunclassified

Mecanismos de remediação dos hidrocarbonetos policíclicos aromáticos do petróleo utilizando microalgas e cianobactérias com vistas a bioeconomia circular

Duarte

Ribeiro

Santos

et al. 2021

RSD

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A água produzida é um efluente da indústria de óleo e gás gerada em grandes quantidades. Seu descarte, sem o devido tratamento prévio, pode ocasionar impactos negativos não só ao meio ambiente como também à saúde humana. Isso ocorre porque a água produzida, além de possuir alta salinidade, é composta por metais pesados, partículas de óleos e compostos químicos com propriedades tóxicas. Dentre os seus componentes, os hidrocarbonetos policíclicos aromáticos (HPAs) são um dos grupos mais preocupantes. Os HPAs são poluentes orgânicos de natureza carcinogênica, recalcitrantes, que, apesar de sua toxicidade, podem ser removidos e degradados por microalgas e cianobactérias a partir de três mecanismos: ficoadsorção, ficossorção e ficodegradação. Mediante ao exposto, esta revisão tem por objetivo fornecer uma visão geral acerca dos mecanismos de remediação dos hidrocarbonetos policíclicos aromáticos (HPAs) por microalgas e cianobactérias. Esta revisão leva em consideração o ponto de vista da bioeconomia circular, onde a biomassa das microalgas e cianobactérias são consideradas uma potencial fonte de elementos essenciais para geração de bioprodutos como biocombustíveis e biopolímeros.

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Microalgae Cultivation and Photobioreactor Design

Cited by 19 publications

References 97 publications

Chlamydomonas reinhardtii Is a Potential Food Supplement with the Capacity to Outperform Chlorella and Spirulina

Chlamydomonas reinhardtii Is a Potential Food Supplement with the Capacity to Outperform Chlorella and Spirulina

Enhancement of Biomass Production in Colony-Forming Green Algae, Botryosphaerella sudetica, Under Mixotrophic Cultivation

Mecanismos de remediação dos hidrocarbonetos policíclicos aromáticos do petróleo utilizando microalgas e cianobactérias com vistas a bioeconomia circular

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