Why water cleaning?
Photo: Some sieve filters do not separate the polluting water substances from the water contact and thus provide a further pollution of the water.
Since no permanent fresh water into the pond comes, the Koi carp are living in their own toilet. The water must be quick and with a well-functioning water treatment again cleaned and prepared. The Koi keeper must ensure that the living conditions are optimized for the fish. In practical terms, the water treatment process, which took place in the normal sewage treatment plants, placed appropriately in the context of a pond.
The water treatment installed at the pond for cleaning the pond water should eliminate the following components from the water: First, the dissolved substances, such as fecal pellets, crop residues, other suspended solids, algae residues etc.
Second, it is important to remove dissolved components from the water. These components, such as ammonium/ammonia, can be dangerous for fish. Also, other substances like phosphate (promotes algae formation), nitrate and especially organic carbon must be removed from water. If these removals are left undone, those substances are still in contact with water, resulting in the fact that further components will steadily be delivered into the water and the number of water pollutants will increase time and again.
Photos: Brushes and Japanese filter mats inside a chamber filter make for a continuous replenishment of water polluting substances.
Only an efficient microbiology can remove these substances from the water.
A major contaminant in water is organic carbon that also comes from the excretions of fish. Organic carbon is used by microorganisms to create new biomass and metabolic energy.
A lot of microorganisms only exist in the presence of oxygen (aerobic), and many species are able to survive even if water does not contain any oxygen (anaerobic).
Both conditions, aerobic and anaerobic, are crucial to remove water polluting substances like carbon, nitrogen or phosphorous. For example: If levels of organic carbon in water are much too high, the biological cleaning performance might not be sufficient enough. In addition, the high organic carbon concentration increases the density of microorganisms in open waters, which can cause a turbidity of water and may result in levels of about 106 germs per milliliter.
Both conditions, aerobic and anaerobic, are crucial to remove water polluting substances like carbon, nitrogen or phosphorous. For example: If levels of organic carbon in water are much too high, the biological cleaning performance might not be sufficient enough. In addition, the high organic carbon concentration increases the density of microorganisms in open waters, which can cause a turbidity of water and may result in levels of about 106 germs per milliliter.
However, the strong biofilm inside the biofilm reactor prevents the high density of microorganisms in open waters (pond water) because it gets the necessary nutrients from the water and thus impairs the nutritional basis for microorganisms in open waters. The biotechnology of the biofilm reactor is designed to avoid the extensive spread of anaerobic areas inside the biofilm – in contrast to large and bulky chamber filters which over time suffer from an uneven perfusion.