The Kaldnes Moving Bed™ process, has
been scientifically tried and tested in fish
farming and waste treatment for over 10
years. Developed by Professor Halvard
Ødergard at Trondheim University of Science
and Technology the Kaldnes Moving Bed™ bio film process has been designed
specifically to create the most effective environment for the nitrification process
to take place. The media is engineered in a wheel shape and is slightly positively
buoyant, allowing a small amount of water flow created by adding air to the
process) to circulate the media throughout the vessel.
Oxygen and food (ammonia and nitrite) gives the bacteria the means to grow,
whilst the Kaldnes media provides maximum surface area for the bacteria to
colonise and produce bio film. It is this process, which removes harmful ammonia
and nitrite from the water. As the Kaldnes media chaotically circulates within
the bio tank, it causes old dead bacteria/bio film on the outside, to be removed
making space for new younger heavier feeding bacteria/bio film to colonise.
Within the wheel, is a protected surface, which enables colonies of bacteria
to naturally follow their life cycle, maturing and dying, in turn fuelling the latter
stages of nitrification conversion process. It also assists in the breakdown of
any small particles passing through from the mechanical stage. Therefore, the
Kaldnes media maintains both a young biofilm & a maturing bio film providing a
more consistent filter performance, whilst improving water quality, encouraging
healthier Koi and aiding in reducing green water and blanket weed. Due
to chaotic movement of Kaldnes K1 media, the process is self-cleaning and
requires no maintenance. This allows the filter to reach optimum effectiveness
without the disturbance of periodic maintenance, avoiding unnecessary loss
of bacteria within the filter preventing high levels of ammonia and nitrite within
the water. The other major benefit of Kaldnes K1 media is the huge ‘active’
surface area available for the bacteria to grow on compared to other types of
media. This feature allows for smaller filter design, e.g. the Nexus, whilst providing
increased biological efficiency.
KALDNES K1 MEDIA
-11-
Mature media
at high feeding loads
Mature media
at low feeding loads
Virgin media
