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Environmental Biotechnology: Biodegradation of Microplastics with Larvae of Tenebrio Molitor and Galleria Mellonella
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Researchers tested the ability of mealworm (Tenebrio molitor) and wax moth (Galleria mellonella) larvae to biodegrade microplastics collected from a Peruvian beach, finding that both species could partially degrade plastic samples, supporting insect larvae as a promising biotechnology for microplastic remediation.
Plastics have become one of the serious problems with a significant negative impact, especially in the sea, due to their long biodegradation time. This is further aggravated when the size of microplastics is reduced because of the exposure to mechanical and temperature effort. One of the places where they are deposited by the dynamics of the sea waves are the beach areas. The research presents as a method of environmental biotechnology, the use of larvae of Tenebrio molitor and Galleria mellonella for the biodegradation of microplastics sample collected from the Azul beach in Ventanilla. The investigation began by characterizing the microplastics, these being identified as polyethylene terephthalate, polyvinyl chloride, and expanded polystyrene. The microplastics were then subjected for periods of 5, 10 and 15 days to larvae of Tenebrio molitor and Galleria mellonella, verifying that at 15 days there was a higher level of biodegradation of these, being 54.2% with 30 larvae of Tenebrio molitor for the Expanded Polystyrene and 34.4% with 30 Galleria mellonella Larvae for Polyvinyl Chloride. It is concluded that the use of these larvae turns out to be a viable and important way as an alternative for the degradation of microplastics and with the advantage of being friendly to the environment.
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This review examines recent discoveries about how wax moth and mealworm larvae can break down common plastics using enzymes in their saliva and gut microorganisms. Researchers found that these insects offer a promising biological alternative to traditional plastic disposal methods like landfilling and incineration, which themselves contribute to microplastic pollution. The study highlights key challenges including the need for standardized testing methods and proposes innovative ideas like using insects as living bioreactors for plastic waste processing.
Biodegradation of various grades of polyethylene microplastics by Tenebrio molitor and Tenebrio obscurus larvae: Effects on their physiology
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Mealworm larvae (Tenebrio molitor and Tenebrio obscurus) were fed different grades of polyethylene plastic to test their ability to biodegrade this common plastic. Both species could consume and partially break down all three types of polyethylene, though the process caused oxidative stress and shifted their gut bacteria. This research suggests biological degradation of plastic waste is possible, which could help reduce the environmental breakdown of plastics into harmful microplastics.
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This review summarizes research on insect larvae, including wax worms and mealworms, that can eat and break down plastic using bacteria and enzymes in their guts. Recent discoveries include novel plastic-degrading enzymes found in wax worm saliva that can begin breaking down polyethylene within hours. While still far from a large-scale solution, this biological approach to plastic degradation could eventually help reduce the microplastic pollution that threatens ecosystems and human health.
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