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Membrane Processes for Microplastic Removal
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This review evaluates the use of membrane technologies for removing microplastics and nanoplastics from wastewater treatment plant effluents. Researchers found that while membrane bioreactors show promise, most existing membrane approaches are still insufficient for comprehensive microplastic removal, especially for the smallest particles. The study suggests that specially designed membrane systems are needed as advanced tertiary treatment to prevent microplastic discharge into waterways.
Plastic pollution of the aquatic environment is a major concern considering the disastrous impact on the environment and on human beings. The significant and continuous increase in the production of plastics causes an enormous amount of plastic waste on the land entering the aquatic environment. Furthermore, wastewater treatment plants (WWTPs) are reported as the main source of microplastic and nanoplastic in the effluents, since they are not properly designed for this purpose. The application of advanced wastewater treatment technologies is mandatory to avoid effluent contamination by plastics. A concrete solution can be represented by membrane technologies as tertiary treatment of effluents in integrated systems for wastewater treatment, in particular, for the plastic particles with a smaller size (< 100 nm). In this review, a survey of the membrane processes applied in the plastic removal is analyzed and critically discussed. From the literature analysis, it was found that the removal of microplastic by membrane technology is still insufficient, and without the use of specially designed approaches, with the exception of membrane bioreactors (MBRs).
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