Biodegradation of high density polyethylene using Streptomyces species

Farzi, Ali; Dehnad, Alireza; Shirzad, Najibeh; Norouzifard, Faezeh

doi:10.12980/jclm.5.2017j7-94

Cited by 24 publications

(13 citation statements)

References 17 publications

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“…and Streptomyces sp. Some bacterial species within these genera have been reported to degrade PE [ 38 , 39 ], confirming that many bacteria belonging to these two genera have the actual potential to degrade PE. However, further characterization is needed for complete taxonomic classification and to determine how closely they are related to the bacteria in the present study.…”

Section: Discussionmentioning

confidence: 87%

Greater Biofilm Formation and Increased Biodegradation of Polyethylene Film by a Microbial Consortium of Arthrobacter sp. and Streptomyces sp.

et al. 2020

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The widespread use of polyethylene (PE) mulch films has led to a significant accumulation of plastic waste in agricultural soils. The biodegradation of plastic waste by microorganisms promises to provide a cost-effective and environmentally-friendly alternative for mitigating soil plastic pollution. A large number of microorganisms capable of degrading PE have been reported, but degradation may be further enhanced by the cooperative activity of multiple microbial species. Here, two novel strains of Arthrobacter sp. and Streptomyces sp. were isolated from agricultural soils and shown to grow with PE film as a sole carbon source. Arthrobacter sp. mainly grew in the suspension phase of the culture, and Streptomyces sp. formed substantial biofilms on the surface of the PE film, indicating that these strains were of different metabolic types and occupied different microenvironments with contrasting nutritional access. Individual strains were able to degrade the PE film to some extent in a 90-day inoculation experiment, as indicated by decreased hydrophobicity, increased carbonyl index and CO2 evolution, and the formation of biofilms on the film surface. However, a consortium of both strains had a much greater effect on these degradation properties. Together, these results provide new insights into the mechanisms of PE biodegradation by a microbial consortium composed of different types of microbes with possible metabolic complementarities.

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Section: Discussionmentioning

confidence: 87%

Greater Biofilm Formation and Increased Biodegradation of Polyethylene Film by a Microbial Consortium of Arthrobacter sp. and Streptomyces sp.

et al. 2020

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“…As the metabolic pathways involved in plastic degradation are still underdeveloped, some studies have been focused on understanding and modeling the biodegradation process for selected strains [ 20 , 35 ], aiming to improve the scale-up of these processes and comprehend the bacterial behavior under controlled conditions. These models have been adjusted to first-order kinetic models, showing high adjustment rates on predicting biodegradation of specific polymers by selected strains [ 20 , 35 ], being useful in the design of new bioprocesses at industrial levels, giving solutions on larger scales to the pollution issue regarding plastic waste accumulation. These bioprocesses could lead to a permanent, efficient, and eco-friendly solution, replacing the traditional waste management options available (i.e., incineration, landfills).…”

Section: Discussionmentioning

confidence: 99%

“…Streptomyces have been studied as bioremediation agents of synthetic [ 20 , 35 ] and natural plastics [ 36 , 37 ]. For synthetic plastics, research has shown promising results for deterioration and weight loss of the initial sample.…”

Section: Introductionmentioning

confidence: 99%

Streptomyces as Potential Synthetic Polymer Degraders: A Systematic Review

et al. 2021

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The inherent resistance of synthetic plastics to degradation has led to an increasing challenge of waste accumulation problem and created a pollution issue that can only be addressed with novel complementary methods such as biodegradation. Since biocontrol is a promising eco-friendly option to address this challenge, the identification of suitable biological agents is a crucial requirement. Among the existing options, organisms of the Streptomyces genus have been reported to biodegrade several complex polymeric macromolecules such as chitin, lignin, and cellulose. Therefore, this systematic review aimed to evaluate the potential of Streptomyces strains for the biodegradation of synthetic plastics. The results showed that although Streptomyces strains are widely distributed in different ecosystems in nature, few studies have explored their capacity as degraders of synthetic polymers. Moreover, most of the research in this field has focused on Streptomyces strains with promising biotransforming potential against polyethylene-like polymers. Our findings suggest that this field of study is still in the early stages of development. Moreover, considering the diverse ecological niches associated with Streptomyces, these actinobacteria could serve as complementary agents for plastic waste management and thereby enhance carbon cycle dynamics.

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“…Other microorganisms like Amycoloptosis species and some Proteobacteria groups have effects respectively on polylactic acid and polypro-lactone with unknown mechanisms of their degradation: the enzymes responsible of the degradation were still unknown [86]. Secretion of biosurfactants makes the PE films relatively more hydrophilic by reducing their surface tension, which facilitates colonization of the bacteria on the polyethylene surface [47]. This factor let to say that some microorganisms are not capable to degrade the microplastics but able to let it more degradable by other ones.…”

Section: Mechanism Of Microplastics Biodegradationmentioning

confidence: 99%

Microplastics in Our Planet: Source, Distribution, Effects and Biodegradation

Rachid

Güngör²

2020

Eskişehir Teknik Üniversitesi Bilim Ve Teknoloji Dergisi - C Yaşam Bilimleri Ve Biyoteknoloji

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In the last decade, the environmental problems of microplastics have been occupied a large place in world scientific researches. The unbreakable property of these particles causes their rapid accumulation in the environment. Their micro and millimetric sizes let them be distributed over the world in a way almost uncontrollable. Works are still multiplying in the identification of the source and nature, in the fate and effects of the microplastics on the different ecosystems. The accumulation of this debris in our ecosystem is a serious problem in the way of their distribution and migration: from the aquatic to the terrestrial ecosystem, all food web class will be affected. Different solutions for escaping their over distribution in the world have been studied. However, the biodegradation of these tiny particles seems the perfect solution for their disappearance from our environments. Studies seem slowly progressed because of different types of microplastics and the unknown mechanism of most of the microorganisms on the surface of microplastics. This review is a synthesis of works done in microplastics by offering a good comprehension of microplastics source, effects, and biodegradation in both aquatic and terrestrial ecosystems. Researchers will have to expand their working fields by approaching to the extreme ecosystems such as caves in the hope of finding microorganisms capable of producing enzymes that could serve in complete degradation of this debris.

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Biodegradation of high density polyethylene using Streptomyces species

Cited by 24 publications

References 17 publications

Greater Biofilm Formation and Increased Biodegradation of Polyethylene Film by a Microbial Consortium of Arthrobacter sp. and Streptomyces sp.

Greater Biofilm Formation and Increased Biodegradation of Polyethylene Film by a Microbial Consortium of Arthrobacter sp. and Streptomyces sp.

Streptomyces as Potential Synthetic Polymer Degraders: A Systematic Review

Microplastics in Our Planet: Source, Distribution, Effects and Biodegradation

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