A review of biopolymer (Poly-β-hydroxybutyrate) synthesis in microbes cultivated on wastewater

Amadu, Ayesha Algade; Qiu, Shuang; Ge, Shijian; Addico, Gloria Naa Dzama; Ameka, Gabriel; Yu, Ziwei; Xia, Wenhao; Abbew, Abdul-Wahab; Shao, Dadong; Champagne, Pascale; Wang, Sufeng

doi:10.1016/j.scitotenv.2020.143729

Cited by 53 publications

(39 citation statements)

References 173 publications

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“…The second step involves the introduction of stress factors, such as nutrient deprivation or high light intensity, to induce the production of valuable secondary metabolites. Although a deficiency in nitrogen is known to inhibit cell cycle processes and the production of several cellular components, surprisingly, lipid and biopolymer (PHB) syntheses rather increase under these conditions [23]. This leads to the accumulation of oil droplets and starch granules in starved cells [22,24].…”

Section: Metabolic Activities and The Production Of Bioactive Compoundsmentioning

confidence: 99%

“…These adaptive responses help to ensure the cell's survival during stressful conditions. Both metabolites (lipids and starch granules) serve as energy stores coupled with the special role of the starch granules in osmotic balance, heat, freezing, and ultraviolet (UV) rays [22,23].…”

Section: Metabolic Activities and The Production Of Bioactive Compoundsmentioning

confidence: 99%

“…Biodegradable polymers such as PHAs are produced as inclusion bodies within cells via the beta-oxidation pathway [28]. Arthrospira (Spirulina), Synechococcus, and Synechocystis, are examples of cyanobacteria species widely employed in biopolymer production [23,29]. Currently majority of commercial bioplastics produced from biologically-derived polymers are sourced from first generation feedstock through fermentation processes.…”

Section: Industrial Applications Of Bioactive Compounds 41 Bio-plasticsmentioning

confidence: 99%

“…Although the potential for biopolymer production from cyanobacteria exists, commercialization on an industrial scale is yet to be achieved. Research is currently geared towards optimization of cultivation and genetic modification approaches for enhanced biopolymer production [23,30,31].…”

Section: Industrial Applications Of Bioactive Compounds 41 Bio-plasticsmentioning

confidence: 99%

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Industrial Applications of Cyanobacteria

Amadu¹,

deGraft-Johnson²,

Ameka³

2022

Cyanobacteria - Recent Advances in Taxonomy and Applications

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Cyanobacteria also known as blue-green algae are oxygenic photoautotrophs, which evolved ca. 3.5 billion years ago. Because cyanobacteria are rich sources of bioactive compounds, they have diverse industrial applications such as algaecides, antibacterial, antiviral and antifungal agents, hence, their wide use in the agricultural and health sectors. Cyanobacterial secondary metabolites are also important sources of enzymes, toxins, vitamins, and other pharmaceuticals. Polyhydroxy- alkanoates (PHA) which accumulate intracellularly in some cyanobacteria species can be used in the production of bioplastics that have properties comparable to polypropylene and polyethylene. Some cyanobacteria are also employed in bioremediation as they are capable of oxidizing oil components and other complex organic compounds. There are many more possible industrial applications of cyanobacteria such as biofuel, biofertilizer, food, nutraceuticals, and pharmaceuticals. Additionally, the metabolic pathways that lead to the production of important cyanobacterial bioactive compounds are outlined in the chapter along with commercial products currently available on the market.

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Section: Metabolic Activities and The Production Of Bioactive Compoundsmentioning

confidence: 99%

Section: Metabolic Activities and The Production Of Bioactive Compoundsmentioning

confidence: 99%

Section: Industrial Applications Of Bioactive Compounds 41 Bio-plasticsmentioning

confidence: 99%

Section: Industrial Applications Of Bioactive Compounds 41 Bio-plasticsmentioning

confidence: 99%

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Industrial Applications of Cyanobacteria

Amadu¹,

deGraft-Johnson²,

Ameka³

2022

Cyanobacteria - Recent Advances in Taxonomy and Applications

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“…Recently, many bacterial strains that belong to the genera of Arenibacter, Vibrio, Ralstonia, Bacillus, Halomonas, Alcaligenes, Shewanella, and Pseudomonas have been studied regarding their PHA production potential [1,[12][13][14][15][16][17]. They are usually produced through a two-stage process and their production depends on bacterial strain and growth conditions [18,19]. The first stage (excess of nutrients) promotes growth, while the second (nutrient limitation) drives PHA accumulation [20].…”

Section: Introductionmentioning

confidence: 99%

Poly-β-Hydroxybutyrate Production by Rhodopseudomonas sp. Grown in Semi-Continuous Mode in a 4 L Photobioreactor

et al. 2021

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The synthesis of polyhydroxybutyrate (PHB) by photosynthetic non-sulfur bacteria is a potential approach for producing biodegradable plastics. In this work, acetate was used as a single carbon source to study the effect on PHB formation in Rhodopseudomonas sp. cultured in a cylindrical four-liter photobioreactor under semi-continuous mode. The cultivation process is divided into a symmetrical growth phase and a PHB accumulation phase separated temporally. The symmetrical growth phase (nutrient sufficient conditions) was followed by a sulfur-limited phase to promote PHB accumulation. The main novelty is the progressive lowering of the sulfur concentration into Rhodopseudomonas culture, which was obtained by two concomitant conditions: (1) sulfur consumption during the bacterial growth and (2) semi-continuous growth strategy. This caused a progressive lowering of the sulfur concentration into Rhodopseudomonas culturedue to the sulfur-free medium used to replace 2 L of culture (50% of the total) that was withdrawn from the photobioreactor at each dilution. The PHB content ranged from 9.26% to 15.24% of cell dry weight. At the steady state phase, the average cumulative PHB was >210 mg/L. Sulfur deficiency proved to be one of the most suitable conditions to obtain high cumulative PHB in Rhodopseudomonas culture.

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Fabrication of poly(lactic acid), poly(butylene succinate), and poly(hydroxybutyrate) bio‐based and biodegradable blends for application in fused filament fabrication‐based 3D printing

Sabalina

Gaidukovs

Jurinovs

et al. 2023

J of Applied Polymer Sci

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The present study highlights biodegradable and bio‐based polymer blends from poly(lactic acid), poly(butylene succinate) (PBS), and poly(hydroxybutyrate) (PHB) as potential filaments for additive manufacturing. Dog‐bone‐shaped parts were prepared using the fused filament fabrication (FFF) technique. To assess polymer compatibility, interface, and printing performance, vertical and horizontal models were prepared and compared. The ratios of PBS/PLA and PBS/PHB were fixed at 5:5 and 7:3 for this research, respectively. The design concept is based on combining high elastic modulus glassy polymers (PLA and PHB) with soft, ductile PBS. The addition of PBS enhanced thermal processing and rheological properties. Scanning electron microscopy images revealed that the blends produced high‐quality prints while maintaining the original resolution and input parameters. Tensile tests revealed that PBS/PLA blends had significantly higher performance properties than PBS/PHB blends. Vertical prints that coincided with strain direction produced significant plastic deformation in PBS/PLA blends, achieving uniform elongation values of up to 10.4% and elongation at break values exceeding 150%. PBS/PHB blends showed lower compatibility for FFF compared with PBS/PLA blends. Produced bio‐based prints showed an increase in elastic modulus and tensile properties distinct from pure‐polymers; thus, blends have excellent potential for tuning the mechanical properties of the final product.

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A review of biopolymer (Poly-β-hydroxybutyrate) synthesis in microbes cultivated on wastewater

Cited by 53 publications

References 173 publications

Industrial Applications of Cyanobacteria

Industrial Applications of Cyanobacteria

Poly-β-Hydroxybutyrate Production by Rhodopseudomonas sp. Grown in Semi-Continuous Mode in a 4 L Photobioreactor

Fabrication of poly(lactic acid), poly(butylene succinate), and poly(hydroxybutyrate) bio‐based and biodegradable blends for application in fused filament fabrication‐based 3D printing

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