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A Multi-Streamline Approach for Upcycling PET into a Biodiesel and Asphalt Modifier
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Researchers developed a multi-stream process to upcycle PET plastic waste into biodiesel precursors and asphalt modifiers. The soluble fraction served as a carbon source for microbial fermentation to produce lipids, while the insoluble fraction was used as an asphalt additive, demonstrating a comprehensive approach to converting plastic waste into valuable products.
The non-degradable nature of petroleum-based plastics and the dependence on petroleum-based products in daily life and production are dilemmas of human development today. We hereby developed a plastic waste upcycling process to address these challenges. A multi-stream fraction strategy was developed to process poly (ethylene terephthalate) (PET) plastics into soluble and insoluble fractions. The soluble fraction was used as a sole carbon source for microbial fermentation to produce biodiesel precursor lipids with an appreciable bioconversion yield. The insoluble fraction containing fractionated polymers was used as the asphalt binder modifiers. The downsized PET additive improved the high-temperature performance of the asphalt binder by 1 performance grade (PG) without decreasing the low-temperature PG. Subsequent SEM imaging unveiled alterations in the micromorphology induced by PET incorporation. Further FTIR and 1H NMR analysis highlighted the aromatic groups of PET polymers as a crucial factor influencing performance enhancement. The results demonstrated the multi-stream fraction as a promising approach for repurposing plastic waste to produce biodiesel and modify asphalt. This approach holds the potential to tackle challenges in fuel supply and enhance infrastructure resilience to global warming.
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Microbial Degradation of PET Plastic Sustainably Yielding Commercially Viable Products
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This review summarizes research on microbial degradation of PET plastic and how the breakdown products could be valorized into commercially useful bioproducts. Converting PET waste biologically into valuable chemicals offers a more sustainable alternative to landfilling or incineration.
Degradation of polyethylene terephthalate (PET) plastic waste via hydrolysis for bitumen modifier: response surface methodology optimisation and characterisation
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Scientists found an efficient way to break down PET plastic (the kind used in water bottles) using a chemical process, turning it into a material that could be mixed into asphalt for road construction. This matters because it offers a practical way to reuse plastic waste that normally sits in landfills for centuries, potentially reducing the amount of plastic that breaks down into microplastics in our environment, water, and food supply.
Catalytic Amounts of an Antibacterial Monomer Enable the Upcycling of Poly(Ethylene Terephthalate) Waste
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Scientists developed a new method to recycle PET plastic waste (commonly used in bottles) into high-value antibacterial material using only small amounts of a special monomer. This approach addresses both plastic pollution and the need for antimicrobial materials, while avoiding the biotoxicity problems of traditional metal-based antibacterial agents. The technique represents a promising way to upcycle plastic waste rather than simply discarding it.
Recent Advances in the Chemobiological Upcycling of Polyethylene Terephthalate (PET) into Value-Added Chemicals
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This review covers recent advances in biological and chemical upcycling of PET plastic waste into value-added chemicals, examining degradation pathways including pyrolysis, gasification, and enzymatic depolymerization that break PET into monomers for use as bioconversion substrates.
Two-step conversion of polyethylene into recombinant proteins using a microbial platform
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Researchers engineered bacteria to break down polyethylene plastic — one of the most common types of plastic pollution — and convert it into useful proteins, demonstrating a promising biological pathway for upcycling plastic waste into valuable materials.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.