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A Review of PHB Production by Cyanobacteria and Its Applications
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This review examines cyanobacteria as photoautotrophic producers of polyhydroxybutyrate (PHB) bioplastic, summarizing how nutrient-stress conditions stimulate PHB accumulation and evaluating the cost-effectiveness and sustainability of using cyanobacteria as an alternative to conventional feedstocks for biodegradable plastic production.
A significant worry is the impact of non-biodegradable plastic garbage. Consequently, efforts are being made to make bioplastics from living resources based on those materials' capacity to decompose. The cost-effectiveness of these resources has led scientists to explore alternatives, such as photoautotrophic cyanobacteria. The prospective significance and rising popularity of exploiting cyanobacteria as a PHB resource are described in this review. Numerous studies demonstrate that under str
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This study investigated Synechocystis sp. PCC 6714 as a cyanobacterium for producing the biodegradable plastic precursor poly-beta-hydroxybutyrate (PHB) directly from CO2 via photosynthesis. Photosynthetic PHB production could reduce costs and improve the sustainability of this bioplastic alternative to petroleum-derived polymers.
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A cyanobacterium (blue-green alga) was found to produce a natural biodegradable plastic called PHB, with production rates affected by temperature, pH, and carbon source. This could be relevant to developing bio-based alternatives to petroleum-derived plastics.
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Researchers cultivated the microalga Scenedesmus acutus on low-cost substrates to produce polyhydroxybutyrate (PHB), a biodegradable bioplastic, demonstrating a cost-effective route toward replacing conventional petroleum-based plastics that persist as microplastic pollutants.
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Researchers investigated the cyanobacterium Leptolyngbya sp. NIVA-CYA 255 as a candidate for biodegradable poly(3-hydroxybutyrate) (PHB) bioplastic production, finding that a three-stage cultivation process combining phototrophic nitrogen/phosphorus depletion followed by mixotrophic sodium acetate supplementation enhanced PHB accumulation, confirmed by FTIR, GC-MS, and fluorescent dye analyses.
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This review examines the production of biopolymers, particularly polyhydroxyalkanoates (PHAs), from microalgae and cyanobacteria as sustainable alternatives to conventional petroleum-based plastics, synthesizing studies on biomass accumulation and production pathways. The authors discuss the properties, applications, and scalability challenges of microalgae- and cyanobacteria-derived bioplastics in the context of reducing plastic pollution and fossil fuel dependence.
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