Deep denitrification is an autotrophic denitrification technology, which refers to the process of reducing NO3--N to N2 under anoxic or anaerobic conditions by autotrophic bacteria using CO2, HCO3-, CO32- and other inorganic carbon as the carbon source for growth, and using cheap inorganic matter as the electron donor.
1. Two operation modes: fixed bed and fluid bed;
2. In the fixed bed, the filler particle size is 2~5 mm, the void ratio is 35%~40%, and the packing density is 1.1~1.2 g/cm3.
1. Denitrogen and phosphorus removal, pH regulation, functional diversification;
2. High denitrification efficiency, short start-up time, and stable effluent.
3. Reduce the cost of carbon source and sludge disposal cost.
Applicable to petrochemical, coking, leather, agrochemical, municipal, printing and dyeing, electroplating, chemical, pharmaceutical, photovoltaic wastewater, and other deep treatment stage; also applicable to high nitrate nitrogen wastewater treatment.