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Plastic-Eating Microbes: a New Potential Solution to Waste Mitigation?
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This review examines the potential of plastic-eating microbes — bacteria and fungi — to help solve the global plastic waste problem. While several organisms can break down PET and other plastics under lab conditions, significant challenges remain in scaling these processes for industrial waste treatment. The author concludes that microbial biodegradation is a promising but not yet sufficient solution to plastic pollution on its own.
Plastic waste is problematic for marine and terrestrial ecosystems due to the mass production of polyethylene terephthalate (PET) single use plastics. What is unclear is a well-thought-out solution to solve pollution problems that will not further damage the environment. Throughout this literature review, I will investigate the role microbes play in plastic degradation, and if plastic eating microbes are an effective solution to the plastic pollution problem. Polyethylene terephthalate (PET) is the chemical name for polyester. It is a clear, strong, and lightweight plastic that is typically used for food and beverage packaging, and other single-use purposes. The most well understood organism identified to be capable of plastic degradation is the heterotrophic bacteria Ideonella sakaiensis. I. sakaiensis can ultimately break down polyethylene plastics with the enzymes PETase and MHETase, making them potentially effective at mitigating the plastic waste crisis. On the scale necessary to solve the global problem of plastic pollution, relying primarily on plastic-eating microbes is currently unrealistic. Currently, research is branching in several different directions: 1) how plastic affects marine and terrestrial organisms, 2) how plastic enters the human food chain and causes health problems, and 3) how microbes degrade plastic. Future research could likely focus on expanding small-scale experiments on heterotrophic microbes to larger scale processing in an industrial waste facility, or working to combine the high PETase hydrolytic activity with thermostable PHEs to incorporate higher thermostability to PETase.
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Scientists are studying certain bacteria and fungi that can naturally "eat" plastic, breaking it down using special enzymes instead of letting it pile up in landfills and oceans. This review paper rounds up what researchers have learned so far, including new tech that could speed up this microbial cleanup process, but notes there are still real challenges before it can be used on a large scale. This matters because as plastic waste breaks down into microplastics that contaminate our water, food, and even our bodies, finding safer ways to eliminate plastic pollution could reduce our long-term exposure to these particles.
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This review explores the environmental challenges of plastic accumulation and the potential for microorganisms to degrade various types of plastics. Researchers summarized recent discoveries of bacteria and fungi capable of breaking down common plastics like polyethylene and PET, though degradation rates remain slow. The study highlights microbial degradation as a promising but still developing biotechnological approach to addressing plastic pollution.
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Researchers reviewed the full landscape of plastic waste management strategies — from production controls and recycling to biological degradation — finding that while traditional approaches have had mixed results, newly discovered plastic-eating microbes and enzymes offer a promising complementary path to reducing the global plastic burden.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.