Advances in Microbial Biotechnology for Sustainable Alternatives to Petroleum-Based Plastics: A Comprehensive Review of Polyhydroxyalkanoate Production

Microorganisms, Journal Year: 2024, Volume and Issue: 12(8), P. 1668 - 1668

Published: Aug. 13, 2024

The industrial production of polyhydroxyalkanoates (PHAs) faces several limitations that hinder their competitiveness against traditional plastics, mainly due to high costs and complex recovery processes. Innovations in microbial biotechnology offer promising solutions overcome these challenges. modification the biosynthetic pathways is one main tactics; allowing for direct carbon flux toward PHA formation, increasing polymer accumulation improving properties. Additionally, techniques have been implemented expand range renewable substrates used production. These feedstocks are inexpensive plentiful but require costly energy-intensive pretreatment. By removing need pretreatment enabling use raw materials, aims reduce costs. Furthermore, downstream processes facilitate separation biomass from culture broth PHAs critical. Genetic modifications alter cell morphology allow secretion directly into medium simplify extraction purification process, significantly reducing operating advances not only enhance efficient sustainable PHAs, also position biopolymers as a viable competitive alternative petroleum-based contributing circular economy dependence on fossil resources.

Language: Английский

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Creating Value from Acidogenic Biohydrogen Fermentation Effluents: An Innovative Approach for a Circular Bioeconomy That Is Acquired via a Microbial Biorefinery-Based Framework

Fermentation, Journal Year: 2023, Volume and Issue: 9(7), P. 602 - 602

Published: June 27, 2023

As a response to the environmental and societal issues that emanate from high reliance on fossil fuels, world is now transitioning toward circular bioeconomy. Acidogenic biohydrogen production envisaged as clean fuel of future due its non-polluting features affordability. The major encumbrance for industrialization this process accumulation metabolic inhibitors (volatile fatty acids (VFAs)), which lower H2 yields. This review discusses novel methods can be adopted valorize acidogenic VFAs via “cascade microbial biorefinery-based” approach enables economically feasible it leads concomitant diverse high-value-added products. work also elucidates key setpoint parameters governing recovery during process. It further explores recent advances in use biorefineries. Finally, paper provides some recommendations might help develop biorefineries future. Studies focusing tailored towards valorization/beneficiation are very scarce literature. aims provide new insights into biorefinery-based processes involving substrates.

Language: Английский

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A review of soil pollution from LDPE mulching films and the consequences of the substitute biodegradable plastic on soil health

International Journal of experimental research and review, Journal Year: 2023, Volume and Issue: 32, P. 15 - 39

Published: Aug. 30, 2023

The plastic film mulching system has a significant role in increasing crop grain yields by changing the microenvironment of plant. On other hand, materials pollute land and water because they are not degraded or disposed properly. Biodegradable mulches (BPM) may be used as substitute for conventional low-density polyethylene (LDPE) to protect soil health. In this review, effect micro(nano)plastics on health function been discussed light their distribution soil, changes biochemistry, interactions between microplastics with microbes plants, growth patterns. nano-plastics now incorporated into food chain from through plants finally harm whole ecosystem, including humans. use BPM practiced recently, but only 1% world’s total production is biodegradable materials. second part confusing terms "bio-based" "biodegradable" were clarified based polymeric constituents. physical parameters different constituent purposes capability sustainable solarization have discussed. ecotoxic effects microorganisms, dwellers like Daphnia magna, Vibrio fischeri bacteria, green algae, slime mould, protozoa, invertebrates earthworms, common fleas focused review. conclusion, was reported improve quality yield reduce weed comparison naked soil. recent short-term studies ensured that stayed unbroken throughout growing season. But simultaneously, affect substantial impact such pH, electrical conductivity, aggregate stability, infiltration, nitrate-N, exchangeable potassium, etc. Therefore, lot long-term research required LDPE agricultural field.

Language: Английский

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Bioconversion of the invasive seaweed Rugulopteryx okamurae into enzymes and polyhydroxyalkanoates

Algal Research, Journal Year: 2024, Volume and Issue: 81, P. 103587 - 103587

Published: June 22, 2024

The invasive macroalgae Rugulopteryx okamurae has been used as raw material for the production of hydrolytic enzymes and polyhydroxyalkanoates (PHA), bioplastic precursors. fungus Aspergillus oryzae, grown in solid state fermentation (SSF) on macroalga biomass, produced several enzymes, mainly xylanase alginate lyase. Also, SSF was biological pretreatment to enhance release fermentable sugars after enzyme hydrolysis subsequent PHA production. To increase sugar concentration reduce total cost process, performed at a high load stirring rate, reducing cocktail dose by 63.5 %. At these conditions, hydrolysate contained 18.52 g/L sugars, which were fermented with Cupriavidus necator, reaching maximum 288.0 mg PHA/L 24 h.

Language: Английский

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Starchy Waste as a Valuable Source of High-Value Biocompounds: Towards Sustainable PHA Production

Published: Jan. 1, 2025

Language: Английский

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