fluidising bed
a biological filtration system used in aquaria comprising of small beads in a cylinder. Bacteria grow on the beads and denitrify the water as it is forced through the cylinder

Dictionary of ichthyology. 2009.

Look at other dictionaries:

  • Knelson concentrator — Knelson concentrators utilise the principles of a centrifuge in order to create an enhanced gravity effect upon a fluidised bed of particles to concentrated dense minerals. The Knelson concentrator often operates as a batch process however new… …   Wikipedia

  • Sediment Profile Imagery — (SPI) is an underwater technique for photographing the interface between the seabed and the overlying water. The technique is used to measure or estimate biological, chemical, and physical processes occurring in the first few centimetres of… …   Wikipedia

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