Microalgae as a Source of Bioplastics

Rahman, Asif; Miller, Charles D.

doi:10.1016/b978-0-444-63784-0.00006-0

Cited by 77 publications

(49 citation statements)

References 96 publications

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“…Microalgae, as a source of active biomolecules, are used in the pharmaceutical and cosmetics industry [ 2 , 3 ]. Algae are gaining also a lot of attention in terms of the production of biodegradable plastics and biofuels [ 2 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

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Astaxanthin and other Nutrients from Haematococcus pluvialis—Multifunctional Applications

2020

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Bioactive compounds of natural origin are gaining increasing popularity. High biological activity and bioavailability, beneficial effects on health and safety of use are some of their most desirable features. Low production and processing costs render them even more attractive. Microorganisms have been used in the food, medicinal, cosmetic and energy industries for years. Among them, microalgae have proved to be an invaluable source of beneficial compounds. Haematococcus pluvialis is known as the richest source of natural carotenoid called astaxanthin. In this paper, we focus on the cultivation methods of this green microalga, its chemical composition, extraction of astaxanthin and analysis of its antioxidant, anti-inflammatory, anti–diabetic and anticancer activities. H. pluvialis, as well as astaxanthin can be used not only for the treatment of human and animal diseases, but also as a valuable component of diet and feed.

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Section: Introductionmentioning

confidence: 99%

“…Microalgae can occur in oceans, rivers or lakes [ 9 ]. Haematococcus pluvialis can grow in particularly difficult conditions, such as the arctic waters of the White Sea [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Astaxanthin and other Nutrients from Haematococcus pluvialis—Multifunctional Applications

2020

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“…The biggest challenge in the production of bioplastic is the source of biomass used where there will be a competition between food and feed applications since these crops consume large amounts of petroleum products in their life cycle (National Renewable Energy Laboratory 2007). Microalgal biomass can be used for producing bioplastics, using the biomass directly or its secondary metabolites (Rahman and Miller 2017;Becker 2007).…”

Section: Introductionmentioning

confidence: 99%

Analysis of polyhydroxybutrate and bioplastic production from microalgae

Abdo

Ali

2019

Bull Natl Res Cent

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Background: Algae manufacture a diversity of base materials that can be used for bioplastics assembly. The most essential compounds are carbohydrates and hydrocarbons. Polyhydroxybutyrate (PHB) is a polymer belonging to the polyester class that is of interest as bio-derived and biodegradable plastics. Results: In this study, three microalgal strains in addition to two microalgal biomass collected from high-rate algal ponds (HRAP) were used to detect their ability to produce polyhydroxybutrate for bioplastic production. The results showed that among the selected strains, Microcystis aeruginosa has the highest polyhydroxybutrate concentration (0.49 ± 0.5 mg mL −1 ). However, the biomass collected from the high-rate algal pond dominated with Microcystis sp. showed a higher concentration (0.7 ± 0.6 mg mL −1 ). Conclusion:The biomass collected from the high-rate algal pond dominated with Microcystis sp. was used for producing bioplastic since it has the highest concentration of PHB. Referring to plasticizing capacity, elongation at break (%) for algal biomass was 530% which was higher than that detected in blank which was 307%. So, it was obvious that the algal bioplastic has good plasticizing capacity.

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“…Thereby, one of the main challenges of microalgae cultivation is the valorisation of every fraction of the microalgae biomass. Among the different components, the carbohydrate fraction could be used as a carbon source for fermentation processes for the production of biofuels like bioethanol, biohydrogen, biobutanol (Sankaran et al, 2018) and even for the production of polyhydroxyalkanoates (Rahman and Miller, 2017).…”

Section: Introductionmentioning

confidence: 99%

Optimisation of the production of fermentable monosaccharides from algal biomass grown in photobioreactors treating wastewater

Martín-Juárez

Vega

Riol-Pastor

et al. 2019

Bioresource Technology

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Biomass grown in wastewater treatment photobioreactors is a cheap raw material with high contents of carbohydrates, proteins and lipids. This work studies the production of fermentable monosaccharides from three biomasses grown in piggery wastewater (P), domestic wastewater (W) and synthetic medium (S) by applying chemical pretreatment and enzymatic hydrolysis, using a Taguchi design.ANOVA identified temperature, chemical reagent type and chemical reagent concentration as significant operational parameters. However, the biomass concentration, pretreatment time, enzyme dosage and enzymatic hydrolysis time had no remarkable effect.The bacterial content of the biomass had no relevant impact on carbohydrate and protein solubilisation but had a remarkable effect on the degradation of the released carbohydrates (57, 60 and 37% for P, W and S), while also affecting lipid solubilisation. Pretreatment with HCl 2M at 120ºC resulted the optimal conditions, achieving a monosaccharide recovery of 53, 59 and 80% for P, W and S biomasses, respectively. Highlights Temperature was the most influential factor on sugar production from algal biomass.  HCl resulted in higher monosaccharide recovery than NaOH. No effect of enzymatic hydrolysis operational factors on sugar production was found  High carbohydrate solubilisations were achieved from biomasses grown in wastewater. Biomass grown in synthetic medium achieved the highest monosaccharide recovery.

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Microalgae as a Source of Bioplastics

Cited by 77 publications

References 96 publications

Astaxanthin and other Nutrients from Haematococcus pluvialis—Multifunctional Applications

Astaxanthin and other Nutrients from Haematococcus pluvialis—Multifunctional Applications

Analysis of polyhydroxybutrate and bioplastic production from microalgae

Optimisation of the production of fermentable monosaccharides from algal biomass grown in photobioreactors treating wastewater

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