Actinobacteria as Promising Candidate for Polylactic Acid Type Bioplastic Degradation

Butbunchu, Natthicha; Pathom-aree, Wasu

doi:10.3389/fmicb.2019.02834

Cited by 78 publications

(48 citation statements)

References 79 publications

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“…The first trial used one of every type of filament produced and the second trial used PLA and PLA/ceramic 90/10 composite filaments with or without the addition of 10 wt% gelatin to the soil. Gelatin was added as a possible means to stimulate growth of microorganisms capable of degrading PLA [ 48 ]. Following the incubation period, samples were removed from the soil and partially cleaned and inspected in a series of steps.…”

Section: Methodsmentioning

confidence: 99%

Development of Antimicrobial PLA Composites for Fused Filament Fabrication

2021

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In addition to possessing the desirable properties of being a biodegradable and biocompatible polymer fabricated from renewable resources, poly (lactic acid) (PLA) has useful mechanical and thermal attributes that has enabled it to be one of the most widely-used plastics for medicine, manufacturing, and agriculture. Yet, PLA composites have not been heavily explored for use in 3D-printing applications, and the range of feasible materials for the technology is limited, which inhibits its potential growth and industry adoption. In this study, tunable, multifunctional antimicrobial PLA composite filaments for 3D-printing have been fabricated and tested via chemical, thermal, mechanical, and antimicrobial experiments. Thermally stable antimicrobial ceramics, ZnO and TiO2, were used as fillers up to 30 wt%, and poly (ethylene glycol) (PEG) was used as a plasticizer to tune the physical material properties. Results demonstrate that the PLA composite filaments exhibit the thermal phase behaviors and thermal stability suitable for 3D-printing. Additionally, PEG can be used to tune the mechanical properties while not affecting the antimicrobial efficacy that ZnO and TiO2 imbue.

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Section: Methodsmentioning

confidence: 99%

Development of Antimicrobial PLA Composites for Fused Filament Fabrication

2021

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“…As displayed in Table 3, PLA is well degraded by actinobacteria that belong to the family Pseudonocardiaceae, and by other taxa that include members of the family Micromonosporaceae, Streptomycetaceae, Streptosporangiaceae, and Thermomonosporaceae [135]. PHAs and its copolymers can be degraded by several bacteria and fungi through production of intracellular and extracellular depolymerases [136].…”

Section: Bioplastic-degrading Microorganismsmentioning

confidence: 99%

“…This summarizes the main idea that pushed to develop the bioplastics. Among the other treatment methods for used bioplastics, microbial degrading activity is a useful way for increasing environmental safety and economic value [135].…”

Section: Biological Treatmentmentioning

confidence: 99%

Biodegradation of Wasted Bioplastics in Natural and Industrial Environments: A Review

et al. 2020

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The problems linked to plastic wastes have led to the development of biodegradable plastics. More specifically, biodegradable bioplastics are the polymers that are mineralized into carbon dioxide, methane, water, inorganic compounds, or biomass through the enzymatic action of specific microorganisms. They could, therefore, be a suitable and environmentally friendly substitute to conventional petrochemical plastics. The physico-chemical structure of the biopolymers, the environmental conditions, as well as the microbial populations to which the bioplastics are exposed to are the most influential factors to biodegradation. This process can occur in both natural and industrial environments, in aerobic and anaerobic conditions, with the latter being the least researched. The examined aerobic environments include compost, soil, and some aquatic environments, whereas the anaerobic environments include anaerobic digestion plants and a few aquatic habitats. This review investigates both the extent and the biodegradation rates under different environments and explores the state-of-the-art knowledge of the environmental and biological factors involved in biodegradation. Moreover, the review demonstrates the need for more research on the long-term fate of bioplastics under natural and industrial (engineered) environments. However, bioplastics cannot be considered a panacea when dealing with the elimination of plastic pollution.

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“…This has a positive impact, since commercially available PLA is one of the most exploited bioplastics as a biodegradable polymer alternative. PLA-degrading actinomycetes can degrade this biopolymer either under field trials or laboratory conditions (Butbunchu and Pathom-aree, 2019). In Table 3, Amycolatopsis orientalis produced extracellular PLA-degrading enzyme with potent degrading activity, meaning that the PLA powder was completely degraded within 8 h. Kibdelosporangium aridum strain also showed high biodegradation ability, reducing about 97% of the initial polymer.…”

Section: Actinobacteriamentioning

confidence: 99%

“…Strains from Amycolatopsis and Actinomadura genera were reported as having promising PLA degradation capacity. These should be further investigated as the market demand for PLA plastics is increasing (Butbunchu and Pathom-aree, 2019).…”

Section: Actinobacteriamentioning

confidence: 99%

Marine Environmental Plastic Pollution: Mitigation by Microorganism Degradation and Recycling Valorization

et al. 2020

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Plastics are very useful materials and present numerous advantages in the daily life of individuals and society. However, plastics are accumulating in the environment and due to their low biodegradability rate, this problem will persist for centuries. Until recently, oceans were treated as places to dispose of litter, thus the persistent substances are causing serious pollution issues. Plastic and microplastic waste has a negative environmental, social, and economic impact, e.g., causing injury/death to marine organisms and entering the food chain, which leads to health problems. The development of solutions and methods to mitigate marine (micro)plastic pollution is in high demand. There is a knowledge gap in this field, reason why research on this thematic is increasing. Recent studies reported the biodegradation of some types of polymers using different bacteria, biofilm forming bacteria, bacterial consortia, and fungi. Biodegradation is influenced by several factors, from the type of microorganism to the type of polymers, their physicochemical properties, and the environment conditions (e.g., temperature, pH, UV radiation). Currently, green environmentally friendly alternatives to plastic made from renewable feedstocks are starting to enter the market. This review covers the period from 1964 to April 2020 and comprehensively gathers investigation on marine plastic and microplastic pollution, negative consequences of plastic use, and bioplastic production. It lists the most useful methods for plastic degradation and recycling valorization, including degradation mediated by microorganisms (biodegradation) and the methods used to detect and analyze the biodegradation.

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Actinobacteria as Promising Candidate for Polylactic Acid Type Bioplastic Degradation

Cited by 78 publications

References 79 publications

Development of Antimicrobial PLA Composites for Fused Filament Fabrication

Development of Antimicrobial PLA Composites for Fused Filament Fabrication

Biodegradation of Wasted Bioplastics in Natural and Industrial Environments: A Review

Marine Environmental Plastic Pollution: Mitigation by Microorganism Degradation and Recycling Valorization

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