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61,005 resultsShowing papers similar to Characterization of Poly(3-hydroxybutyrate) (P3HB) from Alternative, Scalable (Waste) Feedstocks
ClearInfluence of microbial biomass content on biodegradation and mechanical properties of poly(3-hydroxybutyrate) composites
This paper is not about microplastics — it studies how adding microbial biomass (algae and cyanobacteria) to a biodegradable polyester (PHB) accelerates its degradation rate in soil.
Isolation and characterisation of Methylocystis spp. for poly-3-hydroxybutyrate production using waste methane feedstocks
Researchers isolated two new strains of methane-eating bacteria capable of converting waste methane gas — from landfills and digesters — into poly-3-hydroxybutyrate (PHB), a biodegradable plastic alternative. This dual approach could simultaneously reduce greenhouse gas emissions and produce an eco-friendly substitute for conventional petroleum-based plastics.
A Review of PHB Production by Cyanobacteria and Its Applications
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 review on poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) [P(3HB-co-3HHx)] and genetic modifications that affect its production
This review examined the properties, biodegradation behavior, and application potential of the biopolymer P(3HB-co-3HHx), a polyhydroxyalkanoate with mechanical properties comparable to common commodity plastics. The authors assess its viability as a drop-in replacement for single-use plastics, medical devices, and packaging with genuine end-of-life biodegradability.
Biopolymers production from microalgae and cyanobacteria cultivated in wastewater: Recent advances
This review explores how microalgae and cyanobacteria grown in wastewater can produce biodegradable biopolymers as an alternative to conventional plastics. Researchers found that these organisms can manufacture polyhydroxyalkanoates and other bioplastics while simultaneously helping to treat wastewater. The approach offers a promising dual benefit of reducing plastic pollution and creating value from waste streams.
The co-conversion of methane and mixtures of volatile fatty acids into poly(3-hydroxybutyrate-co-3-hydroxyvalerate) expands the potential of an integrated biorefinery
Researchers used a methane-consuming bacterium to simultaneously convert natural gas and food waste byproducts into PHBV, a biodegradable plastic alternative, achieving yields that varied depending on the mix of waste acids supplied. This integrated biorefinery approach could reduce reliance on conventional petroleum-based plastics by making biodegradable polymers from waste streams.
Bioplastics against Microplastics: Screening of Environmental Bacteria for Bioplastics Production
Researchers screened environmental bacteria for their ability to produce polyhydroxyalkanoate bioplastics, which are biodegradable alternatives to conventional petroleum-based plastics. Developing efficient bioplastic-producing strains is one strategy to reduce the long-term accumulation of persistent microplastics in the environment.
Sustainable Polyhydroxyalkanoate Production from Food Waste via Bacillus mycoides ICRI89: Enhanced 3D Printing with Poly (Methyl Methacrylate) Blend
Not relevant to microplastics — this study develops a process for producing the bioplastic polyhydroxybutyrate (PHB) from food waste using bacteria, then blends it with poly(methyl methacrylate) for use as a 3D printing filament.
Production of biopolymers from microalgae and cyanobacteria
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.
Enhanced production of biobased, biodegradable, Poly(3-hydroxybutyrate) using an unexplored marine bacterium Pseudohalocynthiibacter aestuariivivens, isolated from highly polluted coastal environment
Researchers isolated and characterised Pseudohalocynthiibacter aestuariivivens P96, a marine bacterium from a highly polluted coastal environment, finding it capable of producing poly(3-hydroxybutyrate) (PHB) at up to 4.73 g/L corresponding to 87% of total cell dry weight, representing a promising bio-based and biodegradable alternative to fossil-fuel plastics.
Biobased poly(3-hydroxybutyrate acid) composites with addition of aliphatic polyurethane based on polypropylene glycols
This study developed biodegradable composites by blending poly(3-hydroxybutyrate), a natural bioplastic produced by bacteria, with aliphatic polyurethanes to improve its mechanical properties and thermal stability. Improving bioplastic performance is important for replacing conventional petroleum-based plastics that persist in the environment.
Copolymers and Blends Based on 3-Hydroxybutyrate and 3-Hydroxyvalerate Units
This paper is not about microplastics. It reviews the biodegradable biopolymer PHBV (poly(3-hydroxybutyrate-co-3-hydroxyvalerate)), covering its production, properties, degradation behavior, and applications in various sectors. While PHBV is studied as a potential biodegradable alternative to conventional plastics, this paper focuses on polymer science and materials engineering rather than microplastic pollution.
Bio-Polyester/Rubber Compounds: Fabrication, Characterization, and Biodegradation
This paper is not about microplastics; it investigates biodegradable bioplastic blends made from polyhydroxybutyrate and natural rubber as potential alternatives to fossil-based plastics.
Production of polyhydroxyalkanoate (PHA) biopolymer from crop residue using bacteria as an alternative to plastics: a review
This review examines how PHA, a biodegradable plastic made from crop waste using bacteria, could serve as a sustainable alternative to conventional plastics. While PHA breaks down naturally unlike traditional plastics that fragment into microplastics, challenges remain in making it heat-stable and cost-competitive enough for widespread industrial use.
Polyhydroxyalkanoates biosynthesis, resulting polymer structures, and plasticization
This review examines polyhydroxyalkanoates (PHAs), a class of biodegradable biopolymers synthesized by microorganisms, discussing strategies including plasticizers and monomer inclusion to overcome the brittleness and processing challenges of the most common PHA, poly(3-hydroxybutyrate).
Cyanobacteria as a Promising Alternative for Sustainable Environment: Synthesis of Biofuel and Biodegradable Plastics
This review examines how cyanobacteria can serve as a sustainable platform for producing both biofuels and biodegradable plastics like polyhydroxyalkanoates, offering a dual approach to reducing carbon emissions and plastic pollution.
Switching from petro-plastics to microbial polyhydroxyalkanoates (PHA): the biotechnological escape route of choice out of the plastic predicament?
This review makes the case for replacing petroleum-based plastics with microbially produced biodegradable alternatives (PHAs), particularly for packaging and medical applications. If produced efficiently enough, PHAs could reduce persistent plastic waste and the resulting microplastic pollution.
Scalable Biosynthesis and Recovery of Poly-3-Hydroxybutyrate Produced from Cotton-Derived Glucose by Cupriavidus necator
Researchers used cotton-derived glucose as feedstock for biosynthesis of poly-3-hydroxybutyrate (P3HB) by Cupriavidus necator in a 2-L bioreactor, finding that cotton-derived glucose produced more P3HB than commercial glucose with comparable thermal properties. A single-solvent extraction method was developed to simplify polymer recovery, supporting the potential for scaling up bio-based, biodegradable plastic production.
Properties and Degradation Performances of Biodegradable Poly(lactic acid)/Poly(3-hydroxybutyrate) Blends and Keratin Composites
Researchers tested biodegradable blends of polylactic acid and polyhydroxybutyrate with added keratin waste as fillers, assessing how well the composites degrade. The work contributes to developing plastic alternatives that break down in the environment rather than persisting as microplastics.
Poly(3-hydroxybutyrate) production by Rhodopseudomonas sp. S16-VOGS3 cells grown in digested sludge
Researchers demonstrated that photosynthetic bacteria can be grown using nutrient-rich wastewater sludge as a low-cost medium, producing a biodegradable plastic called PHB (polyhydroxybutyrate) when phosphate becomes scarce. This approach offers a way to create eco-friendly bioplastics from waste materials, reducing reliance on petroleum-based plastics.
Microbial degradation of polypropylene microplastics and concomitant polyhydroxybutyrate production: An integrated bioremediation approach with metagenomic insights
Researchers isolated microbial consortia capable of degrading polypropylene microplastics, achieving weight losses of up to 17.8% after 30 days of incubation. The most effective consortium also produced polyhydroxybutyrate, a biodegradable plastic alternative, while breaking down the polypropylene. Metagenomic analysis revealed abundant carbohydrate-active enzymes and oxidation pathways, suggesting an integrated bioremediation approach that simultaneously degrades plastic waste and generates a useful bioplastic.
PHA-Based Bioplastic: a Potential Alternative to Address Microplastic Pollution
This review examines polyhydroxyalkanoate (PHA)-based bioplastics as biodegradable alternatives to petroleum-derived plastics, highlighting their potential to reduce microplastic pollution while discussing challenges in scaling production and improving material properties.
Microbial Production of Biopolymer Polyhydroxybutyrate (PHB): Current Challenges and its Application
This review examines the microbial production of polyhydroxybutyrate (PHB), a biodegradable polyester produced by microorganisms as an energy and carbon storage compound, covering current production challenges and industrial applications. The study discusses PHB as a biopolymer alternative to petroleum-based plastics, addressing cost, yield, and scalability barriers limiting its commercial adoption.
Optimized Poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) (PHBV) Production by Moderately Haloalkaliphilic Bacterium Halomonas alkalicola Ext
Researchers isolated a salt- and alkali-tolerant bacterium from a Kenyan lake and optimized its production of the biodegradable polymer PHBV as an alternative to conventional plastics. Through systematic optimization of growth conditions, they achieved a polymer yield of over 45% of the bacterial cell mass. The study demonstrates that extremophilic microorganisms can serve as efficient producers of biodegradable plastics suitable for packaging and biomedical applications.