Challenge:
Paint particles and microfibres are entering our waterways. Could recreational boats be contributing to the problem? Research by environmental organisation EA Earth Action identified paint particles as a major
source of microplastic leakage, accounting for an estimated 58% of emissions. For boat owners, paint flakes, varnish, oil, diesel and fibres from onboard fabrics can accumulate in bilge water, creating a risk of pollution when water is pumped overboard. Marine pollution is an increasing concern as protected areas expand and environmental requirements become more stringent. Yet many contaminants are microscopic and invisible to the naked eye, meaning boat owners may unknowingly discharge pollutants during normal operation or following maintenance work.
Solution:
Wave International asked marine biologist Monty Halls to put the Wavestream bilge filter to the test.
After fitting a Wavestream filter to his sailing yacht, Halls used the system for six months around Dartmouth and the south coast of England. The filter cartridge was then sent to a specialist microplastics laboratory for analysis. The results revealed significant quantities of captured paint particles and fibres. Researchers also identified red, white, blue and black fibres, potentially originating from clothing, seat covers and bedding aboard the vessel. Organic material, including sludge and slime, was also present.
Installed inline between the bilge pump and the discharge outlet, Wavestream filters capture oil, diesel, microplastics, microfibres and other contaminants before they can be discharged overboard. Manufactured in the UK, Wavestream systems are Lloyd’s Type Approved and designed to meet applicable RCD/RCR requirements. The filters are straightforward to install, with replacement cartridges costing approximately £25 plus VAT.
Outcome:
The six-month trial demonstrated that pollutants accumulating inside a vessel can be captured before they reach the marine environment. Laboratory analysis confirmed that the Wavestream cartridge had retained paint particles, fibres and other material that could otherwise have been discharged with bilge water. The findings highlight the importance of addressing all the marine pollution that is emitted from a boat. This is more than just visible oil slicks, because the filter analysis revealed microscopic fibres, paint particles and trace minerals. As environmental protection becomes increasingly important, Wavestream provides a simple step towards cleaner oceans, rivers and marinas, and effective bilge filtration offers boat owners a practical, proven and cost-effective way to reduce the risk of contaminating the waters in which they sail.
