Extracts such as starch and pro-oxidants employed as artificial materials to make and
change plastics degradation potentials are recent studies techniques used in plastic
degradation. However, thermoplastics gotten from polyolefins, are native recalcitrant material which is known to be resistance to bioremediation process. However,
several methods such as chemical and photo/light degradation are used in the
process. Nonetheless, polymers of plastics (thermoset plastics) such as polyurethane
and aliphatic polyester are easily broken down or eaten by microbes because of the
probable urethane or hydrolytic cleavage molecular bonds they possess as well as a
major source of nitrogen and carbon for the microbes. The authors in conclusion
suggest the utilization of co-polyesters from aliphatic aromatic hydrocarbons for
commercialization because of their biodegradability and mechanical characterization. More so, probable novel methods should be looked into in order to reduce the
influence of plastics wastes on the ecosystem.
PLA (polylactic acid) has been recognized as one of the environmental concerned
plastics derived from bioplastics, a renewable and biodegradable polymer which is
used to supplant petroleum-established plastic materials. Butbunchu and PathomAree (2019) did a mini review of the potentials of Actinobacteria in the biodegradation of polylactic acid for bioplastic. The authors stated that Actinobacteria
enzymatic action, as in degradation of the bioplastic, is a function of economic
value and environmental safety for waste control. Specific examples of such bacterial found in this phylum Actinobacteria is the family Thermomonosporaceae,
Streptosporangiaceae,
Streptomycetaceae,
Micromonosporaceae
and
Psuedonocardiaceae. The authors stated that the cultivation of the degrading species
of the phylum Actinobacteria in the laboratory settings has been shown to be a
serious trial procedure. They resounded that a well-sounded taxonomic understanding on data of specific taxa of importance will pave a way to enhance cultivation and
isolation for polylactic acid degrading microbes. More so, information on novel
quality of the genome of the polylactic acid bacteria will improve their degrading
potentials. In conclusion, the authors recommend the utilization of two important
viable and highly vigor Actinobacteria; Actinomadura and Amycolatopsis to be the
best candidates for degrading bioplastic. More so, their economic worth in the
market have gone higher. In addition, high consideration should be placed on
these strains when sampled, cultured, and isolated for remediation purposes.
Gaytán et al. (2020) tested and evaluated the degrading potentials of bacterial
consortia on xenobiotic residues and polyurethanes recalcitrant from different landfill. The authors elucidate the mode of action of bacterial consortia play when they
feed on polyurethanes plastics. That degrading polyurethanes plastics bacteria can
grow in water polyurethanes dispersion (WPUD) media as the solitary model and
carbon base for the BP8 landfill bacterial consortia. The composition of the WPUD
are mainly glycol ethers, isopropanol and N-methyl 2-pyrrolidone-xenobiotic
extracts and PE-PU-A (polyether-polyurethane-acrylate). The results of the study
showed that the biodegradation process yielded ether groups by oxidative and
hydrolytic mechanisms, recalcitrant aromatic urethanes, C–C and BP8 cleaves
esters, both in the hard and soft segments of the co-polymer. The results of the
metagenomic study, revealed five genomes of which three of them were new strains
14 Plastic-Eating Microorganisms: Recent Biotechnological Techniques for Recycling. . . 363
change plastics degradation potentials are recent studies techniques used in plastic
degradation. However, thermoplastics gotten from polyolefins, are native recalcitrant material which is known to be resistance to bioremediation process. However,
several methods such as chemical and photo/light degradation are used in the
process. Nonetheless, polymers of plastics (thermoset plastics) such as polyurethane
and aliphatic polyester are easily broken down or eaten by microbes because of the
probable urethane or hydrolytic cleavage molecular bonds they possess as well as a
major source of nitrogen and carbon for the microbes. The authors in conclusion
suggest the utilization of co-polyesters from aliphatic aromatic hydrocarbons for
commercialization because of their biodegradability and mechanical characterization. More so, probable novel methods should be looked into in order to reduce the
influence of plastics wastes on the ecosystem.
PLA (polylactic acid) has been recognized as one of the environmental concerned
plastics derived from bioplastics, a renewable and biodegradable polymer which is
used to supplant petroleum-established plastic materials. Butbunchu and PathomAree (2019) did a mini review of the potentials of Actinobacteria in the biodegradation of polylactic acid for bioplastic. The authors stated that Actinobacteria
enzymatic action, as in degradation of the bioplastic, is a function of economic
value and environmental safety for waste control. Specific examples of such bacterial found in this phylum Actinobacteria is the family Thermomonosporaceae,
Streptosporangiaceae,
Streptomycetaceae,
Micromonosporaceae
and
Psuedonocardiaceae. The authors stated that the cultivation of the degrading species
of the phylum Actinobacteria in the laboratory settings has been shown to be a
serious trial procedure. They resounded that a well-sounded taxonomic understanding on data of specific taxa of importance will pave a way to enhance cultivation and
isolation for polylactic acid degrading microbes. More so, information on novel
quality of the genome of the polylactic acid bacteria will improve their degrading
potentials. In conclusion, the authors recommend the utilization of two important
viable and highly vigor Actinobacteria; Actinomadura and Amycolatopsis to be the
best candidates for degrading bioplastic. More so, their economic worth in the
market have gone higher. In addition, high consideration should be placed on
these strains when sampled, cultured, and isolated for remediation purposes.
Gaytán et al. (2020) tested and evaluated the degrading potentials of bacterial
consortia on xenobiotic residues and polyurethanes recalcitrant from different landfill. The authors elucidate the mode of action of bacterial consortia play when they
feed on polyurethanes plastics. That degrading polyurethanes plastics bacteria can
grow in water polyurethanes dispersion (WPUD) media as the solitary model and
carbon base for the BP8 landfill bacterial consortia. The composition of the WPUD
are mainly glycol ethers, isopropanol and N-methyl 2-pyrrolidone-xenobiotic
extracts and PE-PU-A (polyether-polyurethane-acrylate). The results of the study
showed that the biodegradation process yielded ether groups by oxidative and
hydrolytic mechanisms, recalcitrant aromatic urethanes, C–C and BP8 cleaves
esters, both in the hard and soft segments of the co-polymer. The results of the
metagenomic study, revealed five genomes of which three of them were new strains
14 Plastic-Eating Microorganisms: Recent Biotechnological Techniques for Recycling. . . 363