Denitrification of aquarium water
View Patent ↗The invention relates to agents for the removal or reduction of inorganic nitrogen compounds, especially nitrate, from biological aquarium waters, containing a biologically degradable polymer, preferably polycaprolactone (PCL) and to the utilization of said agents.
1. A method of reducing or removing inorganic nitrogen compounds from or in biological container waters comprising applying to said waters polycaprolactone under aerobic conditions.
2. The method of claim 1 , wherein the inorganic nitrogen compound is a nitrate.
3. The method of claim 1 , wherein the polycaprolactone is worked into a bottom layer of material of a container.
4. The method of claim 3 , wherein the polycaprolactone is a granulated material.
5. The method of claim 3 , wherein the amount of polycaprolactone is from 20 g to 200 g per 100 liters of container water.
6. The method of claim 3 , wherein the bottom layer is gravel having a particle size of about 1 to 8 mm.
7. The method of claim 1 , wherein the polycaprolactone is in powder form or a suspension of a powder.
8. The method of claim 7 , wherein the polycaprolactone powder is added to the container water in the form of a paste.
9. The method of claim 7 , wherein the polycaprolactone powder is added to the container water in an amount of from 5 to 20 mg/liter.
10. The method of claim 1 , wherein the polycaprolactone is worked into coated large surfaces.
11. A filtering agent for container water fillers for reducing nitrogen compounds under aerobic conditions comprising polycaprolactone and a homogeneous filtering material, wherein the filtering material is gravel having a particle size of 2 to 5 mm.