A team of researchers from the Royal Melbourne Institute of Technology (RMIT), Australia, has recently introduced a cutting-edge innovation in the effort to mitigate global microplastic pollution. Through the development of a method dubbed "dual-bubble" technology, scientists have successfully created a filtration system capable of eliminating over 90% of microplastic particles from wastewater.
This technology works by simultaneously combining the efficiency of microbubbles and nanobubbles. In operation, microbubbles generate buoyancy that lifts microplastic particles to the surface, while nanobubbles work to enhance particle adhesion and aggregation. This synergy has proven far more effective than using a single type of bubble in the pollutant separation process.
The method is designed to enhance Dissolved Air Flotation (DAF) technology, which is already commonly used in wastewater treatment plants. Its main advantage lies in its ease of implementation; the system can be applied simply by optimizing operational conditions such as air pressure and saturation duration, thus eliminating the need for costly infrastructure overhauls.
Test results indicate that the effectiveness of this technology is unaffected by the presence of complex organic components such as oils and fats frequently found in wastewater. In fact, under certain conditions, these components actually aid the microplastic agglomeration process, making them easier to separate before the wastewater is released into the environment.
Associate Professor Biplob Pramanik, the lead researcher of the study, emphasized that current wastewater treatment plants often serve as distribution points for microplastics that escape standard filtration systems. By capturing these particles at an early stage, microplastic accumulation in ecosystems can be significantly reduced. Currently, the research team is working to establish industry partnerships to conduct large-scale testing to validate this technology in the field.
