Preparation method and application of porous hydrophilic denitrification biological carrier

Abstract

The invention discloses a preparation method and application of a porous hydrophilic denitrification biological carrier. The method comprises the following steps of: adding 75 mass parts of polyether polyol, 25 mass parts of polymer polyol, 3 mass parts of blackwash, 2 mass parts of dichloromethane, 0.25 mass part of surfactant, 0.25 mass part of amine catalyst, 0.3 mass part of tin catalyst and 5 mass parts of water into a 23 to 27 DEG C reaction kettle, and stirring; adding 52.5 mass parts of active agent, and uniformly stirring; adding 62.5 mass parts of toluene diisocynate, uniformly stirring, and performing reaction molding; and putting polyurethane foam subjected to reaction molding into a demolding tank, and blasting for demolding to obtain a magnetic biological denitrification carrier. The carrier prepared by the method has adsorption and catalytic oxidation effects and large specific surface area, a highly active biological film can be quickly formed, microbial cells can reproduce and grow on the huge surface of the carrier and absorb and degrade toxic or inhibiting substances, the carrier has a strong nitrification effect and a certain denitrification effect and can remove total nitrogen, and the residual sludge is obviously reduced.

Description

technical field

[0001] The invention relates to the technical fields of bioengineering, materials and environmental engineering, in particular to a preparation method and application of a porous hydrophilic denitrification biological carrier. Background technique

[0002] The source of ammonia nitrogen wastewater is the discharge of industrial wastewater and the wastewater generated in people's daily life, such as chemical fertilizers, coking, petrochemicals, pharmaceuticals, food, landfills, etc., all produce a large amount of high-concentration ammonia nitrogen wastewater; while the concentration of ammonia nitrogen in domestic wastewater is low, at 25- 50mg / L, but because of its large discharge, it also poses a great threat to the environment. Ammonia nitrogen has a high oxygen consumption, it is toxic to aquatic organisms, and can stimulate its entropy change. The water body contains a large amount of ammonia nitrogen, which causes the water body to produce eutrophicati...