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Microplastic accumulation hotspots in wastewater treatment plants as leverage points for PET valorization and overall emission mitigation

Journal of Environmental Management 2026
Beatrice Luzi, Marco Carnevale Miino, Elena Cristina Rada, Rosa Zullo, Vincenzo Torretta, Silvia Galafassi

Summary

Scientists found spots in wastewater treatment plants where tiny plastic bits (from things like water bottles) build up, and they developed a method to filter out and potentially recycle these plastics before they end up in our environment and water systems. This matters because microplastics that escape treatment plants can spread into rivers, soil, and eventually our food and water supply — so catching them early, and even reusing the material, could help reduce our overall exposure while making wastewater treatment more sustainable.

Polymers
Study Type Environmental

in dewatering water. Micro-PET was detected in filter wash water, supporting the feasibility of the proposed recovery concept; however, its absence in dewatering water suggests that applicability may depend on the composition of the incoming wastewater and on process-specific factors. The optimized separation protocol showed robust and reproducible performance, enabling micro-PET enrichment from complex wastewater- and sludge-derived matrices despite high biomass loads and biofilm-coated particles. Overall, the results suggest that integrating microplastic mitigation with selective polymer recovery could represent a first step towards more resource-oriented wastewater management.

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