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DFM Denitrification Filter Media	buy or view price
The autotrophic bacterial denitrification of water involves the conversion of nitrate into sulphate by the action of bacteria. The process requires a sulphur source and a means of buffering the water against acidic conditions. This is accomplished by our DFM Denitrification Filter Media When 1 g of Nitrate is removed by the bacteria 2.5 g of sulphate are produced and 3 g of our DFM will be consumed and 0.7 grams of bacteria cell biomass will be produced. Equipment Denitrification system using pressure filters Our DIN specification pressure filters or your own pressure sand filter may be suitable as a denitrification systems, click here for details, or any mechanism that brings our product in contact with the water will be effective. Technical issues Autotrophic bacteria such as Thiobacillus denitrificans and Thiomicrospira denitrificans are capable of reducing nitrate to nitrogen gas. The energy source of autotrophic denitrifying microorganisms is derived from oxidation-reduction reactions with elements such as hydrogen or sulphur as the electron donor. Autotrophic denitrifiers utilize inorganic carbon compounds (such as CO2, HCO3-) as their carbon source. Another advantage of autotrophic denitrificans is that reproduction rate is low resulting in less sludge production which minimizes the handling processes. Autotrophic denitrification has been divided into hydrogen-based and sulphur-based processes. Autotrophic organisms such as Micrococcus denitrificans are capable of reducing nitrate to nitrogen while oxidizing hydrogen to water. 55S + 50NO3^2- + 38H₂O + 20CO₂ + 4NH⁺⁴ ----------> 4C₅H₇O₂N + 25N₂ + 55SO₄^-2+ 64H⁺ Phosphate is also consumed in the process and will limit the rate of denitrification, so additional phosphate may be required. This can be dosed into the water either continuously or as a batch process. However in most cases in marine aquaculture or public aquaria there will be a surplus of phosphate.	Particle size 2 to 6mm Bulk bed density = 1 kg/litre more information