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Biodegradation of e-plastic waste by using indigenous bacteria
( Prasenjit Debbarma ),( Reeta Goel ),( M. G. H. Zaidi ) 한국폐기물자원순환학회 2022 ISSE 초록집 Vol.2022 No.-
The industrial revolution followed by technological development successively paved the way to a new era in human civilization. In no case, this revolution will decline, thus, making anthropogenic environmental pollution a major global issue. In the present scenario, e-waste accumulation and management is seriously a daunting task that needs to be tackled efficiently. Traditional methods because of their disadvantages have fuelled the use of biological tools to recover the precious metals present in e-waste and to promote the studies of bioleaching and biodegradation processes. Nevertheless, biodegradation studies of and using raw e-plastic waste is scanty in literatures. Therefore, indigenous soil bacteria are explored through enrichment culture approach followed by screening, identification, construction of bacterial consortia and their application for in situ degradation of e-plastic waste. In this study, potential bacteria namely Achromobacter insolitus strain PE2 (MF943156), Acinetobacter nosocomialis strain PE5 (MF943157), Pseudomonas lalkuanensis Novel strain PE8 (MF943158/CP043311), Pseudomonas aeruginosa strain PE10 (MF943159) and Stenotrophomonas pavanii strain PE15 (MF943160) are identified as e-plastic degraders. Their 16S rDNA sequences have been deposited in NCBI GenBank database for their easy accessibility to scientific community. Pseudomonas lalkuanensis sp. nov. strain PE8 (CP043311) was significantly found to be novel culture and its complete genome sequencing has been done and published. Moreover, two new novel bacterial consortia have been developed viz. C-1 and C-2 for biodegradation of e-waste. Nonetheless, one technology/patent which relates to a direct and standardized protocol for e-waste biodegradation in presence of bacterial consortium have recently published by Indian patent office (201811049946) which can be explored further for sustainable management of e-waste. Conclusively, the findings from this research work could be explored for large scale biodegradation of synthetic polymeric e-waste subsequently. Therefore, this study provides degradation and/or fermentation platform for biological recycling of e-waste under in situ conditions. Further, it will enrich the e-plastic degrading bacteria database and this will provide the directive for development of e-plastic degrading bacterial consortia for sustainable strategies.