Potential Use of Microbial Enzymes for the Conversion of Plastic Waste Into Value-Added Products: A Viable Solution
The widespread use of commercial polymers composed of a mixture of polylactic acid and polyethene terephthalate (PLA-PET) in bottles and other packaging materials has caused a massive environmental crisis. The valorization of these contaminants via cost-effective technologies is urgently needed to a...
| Published in: | Frontiers in Microbiology |
|---|---|
| Main Authors: | , , , , , , |
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2021-11-01
|
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmicb.2021.777727/full |
| _version_ | 1852728986059145216 |
|---|---|
| author | Muhammad Tamoor Muhammad Tamoor Nadia A. Samak Nadia A. Samak Yunpu Jia Yunpu Jia Muhammad Umar Mushtaq Muhammad Umar Mushtaq Muhammad Umar Mushtaq Hassan Sher Hassan Sher Maryam Bibi Jianmin Xing Jianmin Xing Jianmin Xing |
| author_facet | Muhammad Tamoor Muhammad Tamoor Nadia A. Samak Nadia A. Samak Yunpu Jia Yunpu Jia Muhammad Umar Mushtaq Muhammad Umar Mushtaq Muhammad Umar Mushtaq Hassan Sher Hassan Sher Maryam Bibi Jianmin Xing Jianmin Xing Jianmin Xing |
| author_sort | Muhammad Tamoor |
| collection | DOAJ |
| container_title | Frontiers in Microbiology |
| description | The widespread use of commercial polymers composed of a mixture of polylactic acid and polyethene terephthalate (PLA-PET) in bottles and other packaging materials has caused a massive environmental crisis. The valorization of these contaminants via cost-effective technologies is urgently needed to achieve a circular economy. The enzymatic hydrolysis of PLA-PET contaminants plays a vital role in environmentally friendly strategies for plastic waste recycling and degradation. In this review, the potential roles of microbial enzymes for solving this critical problem are highlighted. Various enzymes involved in PLA-PET recycling and bioconversion, such as PETase and MHETase produced by Ideonella sakaiensis; esterases produced by Bacillus and Nocardia; lipases produced by Thermomyces lanuginosus, Candida antarctica, Triticum aestivum, and Burkholderia spp.; and leaf-branch compost cutinases are critically discussed. Strategies for the utilization of PLA-PET’s carbon content as C1 building blocks were investigated for the production of new plastic monomers and different value-added products, such as cyclic acetals, 1,3-propanediol, and vanillin. The bioconversion of PET-PLA degradation monomers to polyhydroxyalkanoate biopolymers by Pseudomonas and Halomonas strains was addressed in detail. Different solutions to the production of biodegradable plastics from food waste, agricultural residues, and polyhydroxybutyrate (PHB)-accumulating bacteria were discussed. Fuel oil production via PLA-PET thermal pyrolysis and possible hybrid integration techniques for the incorporation of thermostable plastic degradation enzymes for the conversion into fuel oil is explained in detail. |
| format | Article |
| id | doaj-art-e8cd0c05c3ca4aaf9853a9e77c4b4975 |
| institution | Directory of Open Access Journals |
| issn | 1664-302X |
| language | English |
| publishDate | 2021-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| spelling | doaj-art-e8cd0c05c3ca4aaf9853a9e77c4b49752025-08-19T21:09:23ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2021-11-011210.3389/fmicb.2021.777727777727Potential Use of Microbial Enzymes for the Conversion of Plastic Waste Into Value-Added Products: A Viable SolutionMuhammad Tamoor0Muhammad Tamoor1Nadia A. Samak2Nadia A. Samak3Yunpu Jia4Yunpu Jia5Muhammad Umar Mushtaq6Muhammad Umar Mushtaq7Muhammad Umar Mushtaq8Hassan Sher9Hassan Sher10Maryam Bibi11Jianmin Xing12Jianmin Xing13Jianmin Xing14CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, ChinaCollege of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, ChinaCAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, ChinaBiofilm Centre, Aquatic Microbiology Department, Faculty of Chemistry, University Duisburg-Essen, Essen, GermanyCAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, ChinaCollege of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, ChinaCAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, ChinaCollege of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, ChinaDepartment of Chemical Engineering, Wah Engineering College, University of Wah, Wah Cantt, PakistanCAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, ChinaCollege of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, ChinaDepartment of Chemical Engineering, Wah Engineering College, University of Wah, Wah Cantt, PakistanCAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, ChinaCollege of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, ChinaChemistry and Chemical Engineering Guangdong Laboratory, Shantou, ChinaThe widespread use of commercial polymers composed of a mixture of polylactic acid and polyethene terephthalate (PLA-PET) in bottles and other packaging materials has caused a massive environmental crisis. The valorization of these contaminants via cost-effective technologies is urgently needed to achieve a circular economy. The enzymatic hydrolysis of PLA-PET contaminants plays a vital role in environmentally friendly strategies for plastic waste recycling and degradation. In this review, the potential roles of microbial enzymes for solving this critical problem are highlighted. Various enzymes involved in PLA-PET recycling and bioconversion, such as PETase and MHETase produced by Ideonella sakaiensis; esterases produced by Bacillus and Nocardia; lipases produced by Thermomyces lanuginosus, Candida antarctica, Triticum aestivum, and Burkholderia spp.; and leaf-branch compost cutinases are critically discussed. Strategies for the utilization of PLA-PET’s carbon content as C1 building blocks were investigated for the production of new plastic monomers and different value-added products, such as cyclic acetals, 1,3-propanediol, and vanillin. The bioconversion of PET-PLA degradation monomers to polyhydroxyalkanoate biopolymers by Pseudomonas and Halomonas strains was addressed in detail. Different solutions to the production of biodegradable plastics from food waste, agricultural residues, and polyhydroxybutyrate (PHB)-accumulating bacteria were discussed. Fuel oil production via PLA-PET thermal pyrolysis and possible hybrid integration techniques for the incorporation of thermostable plastic degradation enzymes for the conversion into fuel oil is explained in detail.https://www.frontiersin.org/articles/10.3389/fmicb.2021.777727/fullPLA-PET wastebioconversionpolyhydroxyalkanoatescircular economyfuel oil |
| spellingShingle | Muhammad Tamoor Muhammad Tamoor Nadia A. Samak Nadia A. Samak Yunpu Jia Yunpu Jia Muhammad Umar Mushtaq Muhammad Umar Mushtaq Muhammad Umar Mushtaq Hassan Sher Hassan Sher Maryam Bibi Jianmin Xing Jianmin Xing Jianmin Xing Potential Use of Microbial Enzymes for the Conversion of Plastic Waste Into Value-Added Products: A Viable Solution PLA-PET waste bioconversion polyhydroxyalkanoates circular economy fuel oil |
| title | Potential Use of Microbial Enzymes for the Conversion of Plastic Waste Into Value-Added Products: A Viable Solution |
| title_full | Potential Use of Microbial Enzymes for the Conversion of Plastic Waste Into Value-Added Products: A Viable Solution |
| title_fullStr | Potential Use of Microbial Enzymes for the Conversion of Plastic Waste Into Value-Added Products: A Viable Solution |
| title_full_unstemmed | Potential Use of Microbial Enzymes for the Conversion of Plastic Waste Into Value-Added Products: A Viable Solution |
| title_short | Potential Use of Microbial Enzymes for the Conversion of Plastic Waste Into Value-Added Products: A Viable Solution |
| title_sort | potential use of microbial enzymes for the conversion of plastic waste into value added products a viable solution |
| topic | PLA-PET waste bioconversion polyhydroxyalkanoates circular economy fuel oil |
| url | https://www.frontiersin.org/articles/10.3389/fmicb.2021.777727/full |
| work_keys_str_mv | AT muhammadtamoor potentialuseofmicrobialenzymesfortheconversionofplasticwasteintovalueaddedproductsaviablesolution AT muhammadtamoor potentialuseofmicrobialenzymesfortheconversionofplasticwasteintovalueaddedproductsaviablesolution AT nadiaasamak potentialuseofmicrobialenzymesfortheconversionofplasticwasteintovalueaddedproductsaviablesolution AT nadiaasamak potentialuseofmicrobialenzymesfortheconversionofplasticwasteintovalueaddedproductsaviablesolution AT yunpujia potentialuseofmicrobialenzymesfortheconversionofplasticwasteintovalueaddedproductsaviablesolution AT yunpujia potentialuseofmicrobialenzymesfortheconversionofplasticwasteintovalueaddedproductsaviablesolution AT muhammadumarmushtaq potentialuseofmicrobialenzymesfortheconversionofplasticwasteintovalueaddedproductsaviablesolution AT muhammadumarmushtaq potentialuseofmicrobialenzymesfortheconversionofplasticwasteintovalueaddedproductsaviablesolution AT muhammadumarmushtaq potentialuseofmicrobialenzymesfortheconversionofplasticwasteintovalueaddedproductsaviablesolution AT hassansher potentialuseofmicrobialenzymesfortheconversionofplasticwasteintovalueaddedproductsaviablesolution AT hassansher potentialuseofmicrobialenzymesfortheconversionofplasticwasteintovalueaddedproductsaviablesolution AT maryambibi potentialuseofmicrobialenzymesfortheconversionofplasticwasteintovalueaddedproductsaviablesolution AT jianminxing potentialuseofmicrobialenzymesfortheconversionofplasticwasteintovalueaddedproductsaviablesolution AT jianminxing potentialuseofmicrobialenzymesfortheconversionofplasticwasteintovalueaddedproductsaviablesolution AT jianminxing potentialuseofmicrobialenzymesfortheconversionofplasticwasteintovalueaddedproductsaviablesolution |