Recovery
A quote below about recovery from this website:
http://www.aquarticles.com/articles/management/Wilkins_Fluidised_Bed_Filters.html
"On a recent visit to the Tropical Marine Centre, Les noticed that they had installed large fluidised bed filters alongside the trickle filter towers. The livestock manager explained that they were installed because they have found that if there is a breakdown, due to power failure, the trickle filters fare very badly and take a long time to recover due to the bacteria dying off en masse. Fluidised bed filters recover quite quickly. This is surprising as one would assume that the bacterial populations would survive much better than those in immersed filter systems simply because the trickle filter bed had direct access to atmospheric oxygen. Apparently there is little osmotic pressure to encourage oxygen to dissolve into the thin layer of water coating the trickle filter media. Totally immersed fluidised beds have an oxygen reserve present in the water. The author has installed his own small fluidised bed filter of his own design in the sump of a Thiel Platinum trickle filter as a piece of test equipment to handle any future power failures."
A quote below about recovery from this website:
http://www.aquarticles.com/articles/management/Wilkins_Fluidised_Bed_Filters.html
"On a recent visit to the Tropical Marine Centre, Les noticed that they had installed large fluidised bed filters alongside the trickle filter towers. The livestock manager explained that they were installed because they have found that if there is a breakdown, due to power failure, the trickle filters fare very badly and take a long time to recover due to the bacteria dying off en masse. Fluidised bed filters recover quite quickly. This is surprising as one would assume that the bacterial populations would survive much better than those in immersed filter systems simply because the trickle filter bed had direct access to atmospheric oxygen. Apparently there is little osmotic pressure to encourage oxygen to dissolve into the thin layer of water coating the trickle filter media. Totally immersed fluidised beds have an oxygen reserve present in the water. The author has installed his own small fluidised bed filter of his own design in the sump of a Thiel Platinum trickle filter as a piece of test equipment to handle any future power failures."
