SEDNA Hamann

摘要

The SEDNA system developed in Germany by Hamann was one of the first systems to be given full approval in 2008. Physical separation is in two stages: a hydrocyclone followed by a compact, self-cleaning filter with 50μm meshes. The cleaning of the filter is triggered by the differential pressure. During backflushing the filter elements are cleaned one by one with seawater without addition of any cleaning substances. When backflushing the ballast water operation continues at a slightly reduced flow rate.