Biopolymer production from biomass produced by Nordic microalgae grown in wastewater

Mehariya, Sanjeet; Plöhn, Martin; Jablonski, Piotr; Stagge, Stefan; Jönsson, Leif J.; Funk, Christiane

doi:10.1016/j.biortech.2023.128901

Cited by 15 publications

(5 citation statements)

References 22 publications

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“…Selvaraj et al [80] recorded maximum 80% PHB production by Chlorella sp. The highest recorded PHB content of 27% dry weight was achieved by Mehariya et al [81] during cultivation of Chlorococcum sp. in BG-11 medium supplemented with sugar-rich hydrolysate (carbon source).…”

Section: Polyhydroxyalkanoatesmentioning

confidence: 94%

Green Synthesis of Bioplastics from Microalgae: A State-of-the-Art Review

Adetunji,

Erasmus

2024

Polymers

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The synthesis of conventional plastics has increased tremendously in the last decades due to rapid industrialization, population growth, and advancement in the use of modern technologies. However, overuse of these fossil fuel-based plastics has resulted in serious environmental and health hazards by causing pollution, global warming, etc. Therefore, the use of microalgae as a feedstock is a promising, green, and sustainable approach for the production of biobased plastics. Various biopolymers, such as polyhydroxybutyrate, polyurethane, polylactic acid, cellulose-based polymers, starch-based polymers, and protein-based polymers, can be produced from different strains of microalgae under varying culture conditions. Different techniques, including genetic engineering, metabolic engineering, the use of photobioreactors, response surface methodology, and artificial intelligence, are used to alter and improve microalgae stocks for the commercial synthesis of bioplastics at lower costs. In comparison to conventional plastics, these biobased plastics are biodegradable, biocompatible, recyclable, non-toxic, eco-friendly, and sustainable, with robust mechanical and thermoplastic properties. In addition, the bioplastics are suitable for a plethora of applications in the agriculture, construction, healthcare, electrical and electronics, and packaging industries. Thus, this review focuses on techniques for the production of biopolymers and bioplastics from microalgae. In addition, it discusses innovative and efficient strategies for large-scale bioplastic production while also providing insights into the life cycle assessment, end-of-life, and applications of bioplastics. Furthermore, some challenges affecting industrial scale bioplastics production and recommendations for future research are provided.

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Section: Polyhydroxyalkanoatesmentioning

confidence: 94%

Green Synthesis of Bioplastics from Microalgae: A State-of-the-Art Review

Adetunji,

Erasmus

2024

Polymers

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“… Wastewater pretreated by thermochemical treatment with 1% H 2 SO 4 increases the solubility of total sugars. 27 3.83 ± 0.24 [ 168 ] Synechocystis sp. Secondary effluent 10 L pH 7.99; conductivity 2.47 ± 0.08 mS.cm − 1 ; COD 96.65 ± 40.70 mgO 2 .L − 1 Hydraulic retention time (HRT) 8 d; lipid accumulation 44.7% (30 d) 4.8 - [ 169 ] Bacillus sp.…”

Section: Bioprocess Parameter Affect and Scaleup Studiesmentioning

confidence: 99%

A review on microbes mediated resource recovery and bioplastic (polyhydroxyalkanoates) production from wastewater

Ahuja,

Singh,

Mahata

et al. 2024

Microb Cell Fact

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Background Plastic is widely utilized in packaging, frameworks, and as coverings material. Its overconsumption and slow degradation, pose threats to ecosystems due to its toxic effects. While polyhydroxyalkanoates (PHA) offer a sustainable alternative to petroleum-based plastics, their production costs present significant obstacles to global adoption. On the other side, a multitude of household and industrial activities generate substantial volumes of wastewater containing both organic and inorganic contaminants. This not only poses a threat to ecosystems but also presents opportunities to get benefits from the circular economy. Main body of abstract Production of bioplastics may be improved by using the nutrients and minerals in wastewater as a feedstock for microbial fermentation. Strategies like feast-famine culture, mixed-consortia culture, and integrated processes have been developed for PHA production from highly polluted wastewater with high organic loads. Various process parameters like organic loading rate, organic content (volatile fatty acids), dissolved oxygen, operating pH, and temperature also have critical roles in PHA accumulation in microbial biomass. Research advances are also going on in downstream and recovery of PHA utilizing a combination of physical and chemical (halogenated solvents, surfactants, green solvents) methods. This review highlights recent developments in upcycling wastewater resources into PHA, encompassing various production strategies, downstream processing methodologies, and techno-economic analyses. Short conclusion Organic carbon and nitrogen present in wastewater offer a promising, cost-effective source for producing bioplastic. Previous attempts have focused on enhancing productivity through optimizing culture systems and growth conditions. However, despite technological progress, significant challenges persist, such as low productivity, intricate downstream processing, scalability issues, and the properties of resulting PHA. Graphical abstract

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“…The swift pace of global industrialization, which currently poses a risk to worldwide stability, requires immediate and utmost focus on the substitution of petroleum-based commodities and polymers. Furthermore, the accumulating plastic waste in the environment, along with societies’ lack of efficient management strategies and the consequential escalation in GHG emissions, presents an urgent demand for environmentally sustainable materials [ 188 , 189 ].…”

Section: Emerging and Innovative Applicationsmentioning

confidence: 99%

Emerging Applications of Chlorella sp. and Spirulina (Arthrospira) sp.

Abreu¹,

Martins²

2023

Bioengineering

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Chlorella sp. and Spirulina (Arthrospira) sp. account for over 90% of the global microalgal biomass production and represent one of the most promising aquiculture bioeconomy systems. These microorganisms have been widely recognized for their nutritional and therapeutic properties; therefore, a significant growth of their market is expected, especially in the nutraceutical, food, and beverage segments. However, recent advancements in biotechnology and environmental science have led to the emergence of new applications for these microorganisms. This paper aims to explore these innovative applications, while shedding light on their roles in sustainable development, health, and industry. From this state-of-the art review, it was possible to give an in-depth outlook on the environmental sustainability of Chlorella sp. and Spirulina (Arthrospira) sp. For instance, there have been a variety of studies reported on the use of these two microorganisms for wastewater treatment and biofuel production, contributing to climate change mitigation efforts. Moreover, in the health sector, the richness of these microalgae in photosynthetic pigments and bioactive compounds, along with their oxygen-releasing capacity, are being harnessed in the development of new drugs, wound-healing dressings, photosensitizers for photodynamic therapy, tissue engineering, and anticancer treatments. Furthermore, in the industrial sector, Chlorella sp. and Spirulina (Arthrospira) sp. are being used in the production of biopolymers, fuel cells, and photovoltaic technologies. These innovative applications might bring different outlets for microalgae valorization, enhancing their potential, since the microalgae sector presents issues such as the high production costs. Thus, further research is highly needed to fully explore their benefits and potential applications in various sectors.

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Biopolymer production from biomass produced by Nordic microalgae grown in wastewater

Cited by 15 publications

References 22 publications

Green Synthesis of Bioplastics from Microalgae: A State-of-the-Art Review

Green Synthesis of Bioplastics from Microalgae: A State-of-the-Art Review

A review on microbes mediated resource recovery and bioplastic (polyhydroxyalkanoates) production from wastewater

Emerging Applications of Chlorella sp. and Spirulina (Arthrospira) sp.

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