Harnessing Ultrasound for Microplastic Filtration
Justin Huang and Victoria Ou · The Woodlands, Texas
Gordon E. Moore Award for Positive Outcomes for Future Generations ($50,000) · Regeneron International Science and Engineering Fair · 2024
A prototype filtration system that uses acoustic force from high-frequency ultrasound to push suspended microplastic particles out of water, with no physical filter medium to clog or replace.
Removed between 84% and 94% of suspended microplastic particles in a single pass in laboratory tests.
A filter with nothing to clog sidesteps the failure mode that ends most filtration projects. Reporting a range rather than a single best number is the honest form, and it is more persuasive than a headline figure.
- Acoustophoretic separation
- High-frequency ultrasound generation
- Single-pass removal-rate measurement
- Microplastic particle counting
- Report the range you observed, not your best run — a range reads as a measurement, a single number reads as a demo
- Removing the consumable removes the maintenance argument against your design
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