The sustainability of microbial bioplastics, production and applications

El-malek, Fady Abd; Khairy, Heba; Farag, Aïda M.; Omar, Sanaa H.

doi:10.1016/j.ijbiomac.2020.04.076

Cited by 74 publications

(43 citation statements)

References 122 publications

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“…Semi-biodegradable starch-linked plastic contains more additional short polymers that are non-biodegradable. However, the fragments of polyethylene, as a non-starch portion of the polymer, prevent the plastics to be degraded by the bacteria [ 28 ]. Figure 2 shows the classification of biopolymers based on production [ 13 ].…”

Section: Current Situation Of Global Plasticmentioning

confidence: 99%

“…Secondly, polymers that are obtained by the extraction and separation of agricultural waste products produce starch, cellulose, and alynates [ 13 ]. Additionally, polylactides and polybutylene succinate are polymers from biotechnology obtained by the conventional synthesis process [ 28 ].…”

Section: Current Situation Of Global Plasticmentioning

confidence: 99%

“…However, due to the strong cohesion of LF components, the procedure of separating the compounds such as lignin, cellulose, and hemicellulose could be tedious [ 93 ]. According to Preethi et al, when Ralstonia eutropha was explored using Jambul seed, Syzygium cumini , the PHA production was 41.77% of cell dry weight (CDW) with (0.044 g/L) [ 28 ]. For effective production of PHA production, cellulose hydrolysates have been utilised as carbon sources.…”

Section: Carbon Sources or Feedstocks For Pha Productionmentioning

confidence: 99%

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Recent Advances in the Biosynthesis of Polyhydroxyalkanoates from Lignocellulosic Feedstocks

Vigneswari

Noor

Amelia

et al. 2021

Life

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Polyhydroxyalkanoates (PHA) are biodegradable polymers that are considered able to replace synthetic plastic because their biochemical characteristics are in some cases the same as other biodegradable polymers. However, due to the disadvantages of costly and non-renewable carbon sources, the production of PHA has been lower in the industrial sector against conventional plastics. At the same time, first-generation sugar-based cultivated feedstocks as substrates for PHA production threatens food security and considerably require other resources such as land and energy. Therefore, attempts have been made in pursuit of suitable sustainable and affordable sources of carbon to reduce production costs. Thus, in this review, we highlight utilising waste lignocellulosic feedstocks (LF) as a renewable and inexpensive carbon source to produce PHA. These waste feedstocks, second-generation plant lignocellulosic biomass, such as maize stoves, dedicated energy crops, rice straws, wood chips, are commonly available renewable biomass sources with a steady supply of about 150 billion tonnes per year of global yield. The generation of PHA from lignocellulose is still in its infancy, hence more screening of lignocellulosic materials and improvements in downstream processing and substrate pre-treatment are needed in the future to further advance the biopolymer sector.

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Section: Current Situation Of Global Plasticmentioning

confidence: 99%

Section: Current Situation Of Global Plasticmentioning

confidence: 99%

Section: Carbon Sources or Feedstocks For Pha Productionmentioning

confidence: 99%

See 1 more Smart Citation

Recent Advances in the Biosynthesis of Polyhydroxyalkanoates from Lignocellulosic Feedstocks

Vigneswari

Noor

Amelia

et al. 2021

Life

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“…PHAs are linear polyesters, produced by microbiological, enzymatic, or chemical processes, but their industrial production is still not cost-competitive (Medeiros Garcia Alcântara et al 2020). Renewable and inexpensive carbon sources-such as macroalgae, peanut oil, crude glycerol, and whey-have been studied to reduce production costs (El-malek et al 2020). Innovative research proposed the production of PHAs by a three-step process consisting of CO 2 reduction to acetate and butyrate by microbial electrosynthesis, extraction/ concentration of acetate and butyrate, and PHAs production from volatile fatty acids.…”

Section: Introductionmentioning

confidence: 99%

Bioplastic from Renewable Biomass: A Facile Solution for a Greener Environment

et al. 2021

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Environmental pollutions are increasing day by day due to more plastic application. The plastic material is going in our food chain as well as the environment employing microplastic and other plastic-based contaminants. From this point, bio-based plastic research is taking attention for a sustainable and greener environment with a lower footprint on the environment. This evaluation should be made considering the whole life cycle assessment of the proposed technologies to make a whole range of biomaterials. Bio-based and biodegradable bioplastics can have similar features as conventional plastics while providing extra returns because of their low carbon footprint as long as additional features in waste management, like composting. Interest in competitive biodegradable materials is growing to limit environmental pollution and waste management problems. Bioplastics are defined as plastics deriving from biological sources and formed from renewable feedstocks or by a variation of microbes, owing to the ability to reduce the environmental effect. The research and development in this field of bio-renewable resources can seriously lead to the adoption of a low-carbon economy in medical, packaging, structural and automotive engineering, just to mention a few. This review aims to give a clear insight into the research, application opportunities, sourcing and sustainability, and environmental footprint of bioplastics production and various applications. Bioplastics are manufactured from polysaccharides, mainly starch-based, proteins, and other alternative carbon sources, such as algae or even wastewater treatment byproducts. The most known bioplastic today is thermoplastic starch, mainly as a result of enzymatic bioreactions. In this work, the main applications of bioplastics are accounted. One of them being food applications, where bioplastics seem to meet the food industry concerns about many the packaging-related issues and appear to play an important part for the whole food industry sustainability, helping to maintain high-quality standards throughout the whole production and transport steps, translating into cleaner and smarter delivery chains and waste management. High perspectives resides in agricultural and medical applications, while the number of fields of applications grows constantly, for example, structural engineering and electrical applications. As an example, bio-composites, even from vegetable oil sources, have been developed as fibers with biodegradable features and are constantly under research.

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“…; Alcântara et al, 2020). As biodiesel production is increasing, the glycerol market has expanded rapidly, and using this by-product as a cheap substrate could be integrated into a circular economy approach (El-malek et al, 2020). In this context, we isolated a new strain of Photobacterium ganghwense that can convert glycerol to biodegradable polymers (PHA) in the form of poly-3-hydroxybutyrate (PHB).…”

Section: Introductionmentioning

confidence: 99%