Filter performance testing
Filters in Ballast Water Management Systems
We offer testing of filtration units for use in ballast water management systems (BWMS) in accordance with the IMO and U.S. Coast Guard requirements for type approval. The U.S. Coast Guard defines two standard procedures for testing to include an upgraded filter version or a new filter in the existing type approval certificate.
Upgraded filter testing is the less comprehensive testing procedure, which includes two tests of an upgraded filter version in each of two test water salinities. The testing procedure is designed to verify equivalence between filters.
The tests are typically performed as comparison testing between the old and a new version of the filter. The filter comparison test normally includes analyses of water quality parameters and live organisms ≥50 µm. The ‘upgraded filter testing’ is required, when the filter manufacturer makes significant changes of the filter, such as mesh geometry, additional backwash suction-arm or a new and more compact design.
Alternate filter testing is the more comprehensive testing procedure, which includes three tests of a new filter in each of three test water salinities. The new filter will be connected to the BWMS, and the testing will be performed according to the requirements for type approval of BWMS.
Manufacturers are welcome to contact us directly for an initial discussion of the challenge conditions and the design of the filter performance testing. We are happy to collaborate with a verification body (classification society) to overview the testing and we may introduce you to the parties with whom we collaborate such as Det Norske Veritas (DNV), Lloyd’s Register (LR), Prüfinstitut für Abwassertechnik (PIA), and ETA-Denmark.
Key Features
Equivalence between filters can be determined by applying statistical tools of the results from filter testing.
Testing can be completed in 1 month (upgraded) or 2 months (alternate) from the date of installation.
Testing can be performed at our test facility in Denmark or at the manufacturer’s own facility.
Testimonial
Gallery
Need more information? Talk to our DHI experts:
Pernille Bohn or Rémi Maguet
You can send your inquiry to our general e-mail address found below or use our contact form