We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Microbial Allies in Plastic Degradation: Specific bacterial genera as universal plastic-degraders in various environments
Summary
Researchers identified specific bacterial genera capable of degrading multiple types of plastic across different environments including landfill soil, sewage sludge, and river water. They found that certain bacteria, such as Pseudomonas and Bacillus species, consistently appeared as effective plastic degraders regardless of the environment. The study suggests that these universal plastic-degrading bacteria could be valuable candidates for developing bioremediation strategies to address plastic pollution.
Microbiological degradation of polymers offers a promising approach for mitigating environmental plastic pollution. This study (i) elucidated the diversity and structure of bacterial microbiomes from distinct environments (landfill soil, sewage sludge, and river water) characterized by specific physicochemical parameters, and (ii) utilized environment-derived microbial cultures enriched with microplastics (MPs) to investigate the degradation of polymers and identify culturable bacterial strains contributing to the plastisphere. We found that alpha diversity was notably higher in river water (∼20%) compared to landfill soil and sewage sludge. Dominant phyla included Pseudomonadota in sewage sludge (39.1%) and water (23.7%), while Actinomycetota prevailed in soil (38.5%). A multistage experiment, involving successive subcultures of environmental microbiomes exposed to polypropylene (PP), polyvinyl chloride (PVC), polycarbonate (PC), and polylactic acid (PLA), facilitated the assessment of MPs degradation processes. Analysis of carbonyl indices CIs and FTIR spectra revealed substantial structural changes in the treatment PVC-landfill soil, as well as in PLA- and PC-sludge enriched cultures. Further, using enriched cultures as a source of microorganisms, the study obtained 17 strains of plastic degraders from landfill soil, 14 from sewage sludge, and 6 from river water. Remarkably, similar bacterial genera were isolated across environmental microbiomes regardless of the MPs substrate used in enriched cultures. Among the 37 identified strains, Pseudomonadota predominated (64.86%) and were accompanied by Bacteroidota (16.22%), Actinomycetota (13.51%), and Bacillota (5.41%). This study highlights the complex relationship between microbiome diversity and the biodegradation efficiency of plastics, showing the potential for using microbial communities in the plastic pollution management.
Sign in to start a discussion.
More Papers Like This
Toward sustainable plastic bioremediation using bacterial consortia from aquatic environments.
This study explored the biotechnological potential of native bacteria from diverse aquatic environments to biodegrade synthetic plastics and microplastics. Bacterial consortia isolated from contaminated sites showed promising plastic-degrading capabilities, pointing toward bioremediation strategies for plastic pollution.
Evidence of Plastic Degrading Bacteria in Aquatic Environment
This review examines evidence for plastic-degrading bacteria in aquatic environments, summarizing identified microorganisms and their enzymatic mechanisms capable of breaking down plastic materials, and discussing the potential application of these organisms in bioremediation of plastic pollution.
Enrichment and isolation of micro plastic degrading microorganisms from various natural sources
Researchers isolated microplastic-degrading microorganisms from soil and water samples using mineral salt media with polyethylene and polypropylene as sole carbon sources, successfully identifying four distinct microbial isolates capable of degrading these polymers.
Characterization of plastic degrading bacteria isolated from sewage wastewater
Researchers isolated bacteria from sewage wastewater that can degrade plastic, with two Pseudomonas strains achieving 25% weight loss of plastic pieces over 120 days. Chemical analysis confirmed the bacteria were breaking down and transforming the plastic polymer bonds. These plastic-eating bacteria could offer a green biotechnology approach to reducing microplastic pollution in wastewater systems.
Synergistic functional activity of a landfill microbial consortium in a microplastic-enriched environment
Scientists studied soil bacteria from a decades-old landfill to understand how microbes adapt to high concentrations of polyethylene and PET microplastics. They found that multiple bacterial species work together to break down these plastics, with different roles for bacteria floating freely versus those attached to plastic surfaces. While biodegradation of microplastics is possible, it is slow, and understanding these natural processes could eventually help with cleanup efforts.