Yaliang Duan , Yanli Yin , Zifu Ni , Jianguang Liu , Haitao Gui , Dapeng Wu , Xingquan Wu , Le Wang
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The effective and green biodegradation of polyethylene microplastics by the screening of a strain with its degrading enzymes
The polyethylene microplastics (MPs) degrading fungi named the strain DL-1 were isolated and screened to reduce the pollution of polyethylene MPs. The strain was preliminarily identified as Aspergillus niger by the sequence homology comparison and phylogenetic tree construction. The biodegradation rate of polyethylene MPs by the strain DL-1 was 7.65 ± 0.92 % after 30 days. The grooves and wrinkles appeared on the surface of MPs after the degradation. During the effective degradation process, the strain DL-1 produced the enzymes (plastic degrading enzymes) to biodegrade the polyethylene MPs. It was showed that the plastic degrading enzymes increased under the induction of polyethylene MPs in the medium, indicating that the enzymes played the important role in biodegradation of polyethylene MPs. Moreover, the ability of strain to biodegrade polyethylene MPs and the mechanism of biodegradation were investigated with varied measurements and characteristics. It enriched the way of microbial degradation of polyethylene MPs and provided the environmentally-friendly biodegradation with the green treatment for MPs.
期刊介绍:
The Biochemical Engineering Journal aims to promote progress in the crucial chemical engineering aspects of the development of biological processes associated with everything from raw materials preparation to product recovery relevant to industries as diverse as medical/healthcare, industrial biotechnology, and environmental biotechnology.
The Journal welcomes full length original research papers, short communications, and review papers* in the following research fields:
Biocatalysis (enzyme or microbial) and biotransformations, including immobilized biocatalyst preparation and kinetics
Biosensors and Biodevices including biofabrication and novel fuel cell development
Bioseparations including scale-up and protein refolding/renaturation
Environmental Bioengineering including bioconversion, bioremediation, and microbial fuel cells
Bioreactor Systems including characterization, optimization and scale-up
Bioresources and Biorefinery Engineering including biomass conversion, biofuels, bioenergy, and optimization
Industrial Biotechnology including specialty chemicals, platform chemicals and neutraceuticals
Biomaterials and Tissue Engineering including bioartificial organs, cell encapsulation, and controlled release
Cell Culture Engineering (plant, animal or insect cells) including viral vectors, monoclonal antibodies, recombinant proteins, vaccines, and secondary metabolites
Cell Therapies and Stem Cells including pluripotent, mesenchymal and hematopoietic stem cells; immunotherapies; tissue-specific differentiation; and cryopreservation
Metabolic Engineering, Systems and Synthetic Biology including OMICS, bioinformatics, in silico biology, and metabolic flux analysis
Protein Engineering including enzyme engineering and directed evolution.