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Environmental & sustainable water treatment by Marine Biologists
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Active Water Treatment Products Environmental & sustainable water treatment by Marine Biologists |
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| | DrydenAqua homepage | AFM homepage | Water treatment | swimming pools | Aquaculture & Aquaria | Products |chemical products |oxygen probes | air diffusers | mechanical filtration | | ||
| Biofiltration media static trickling down flow | flooded biofilters | fluidised bed biofilters | www.Bioballs.eu | biofilter media shop | ||||
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The performance of a nitrifying bacteria filter (Biofilters) is closely related to the type of bacterial support media used. Aspects of importance are the surface area per unit volume, water distribution and flow characteristics when passing through the media, non-blocking properties and a low weight per unit volume for the packing. The material from which the packing is constructed should also have a micro environment suitable for colonization by nitrifying bacteria. Many plastic packing are of PVC construction which could be toxic to fish, molluscs, crustaceans and certain bacteria, our packing is non toxic virgin grade high density polyethylene The packing and quality of the media which we provide meets all of the above criteria and in our opinion is the most suitable packing material for aquaculture and aquaria.
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Fluidised bed biofilter media Fluidised filter packing Fluidised media for aerated moving beds, 602 square meters per cubic metre. The surface area is very high, however the surface area is to some extent not too important, because generally the centre of the media will be filled with bacterial cell biomass. The media therefore holds on to the bacteria cell biomass even when the tank is aggressively aerated. |
Flooded or trickling down flow media  Static packing The static packing measures 30mm x 30mm and is just about the smallest packing we would recommend for flooded or tricking down flow biofilters. The surface area is 320 square meters per cubic meter surface area. Our biofiltration media is a high quality product for use in freshwater and marine aquaculture systems. When water percolates down through the biofilter, up to 20% of the volume of the filter may be water making is way down through the filter bed. A biofilter 3 meters deep may have a weight of 800 kg per m2. This mass of water and media can compress and collapse a biofilter after a few years, especially if it develops a heavy growth of biofilm. Our media is structurally very strong which means it will support its own weight and should survive for the life of the system. The last thing you want to be doing is digging out a biofilter after 6 months of operation. |
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Last modified: June 24, 2010