A high ammonia nitrogen autotrophic denitrification device

Abstract

The invention discloses a high-ammonia-nitrogen autotrophic denitrification device, which belongs to the technical field of wastewater treatment. The device includes a reactor main body, the bottom of which is connected to a third pump body through a delivery pipe body, and a three-phase separator, which is arranged in the upper part of the reactor main body , the bottom side wall of the reactor main body is connected with the second pump body through the conveying pipe body, the filler filling assembly is arranged in the reactor main body, and the ultrasonic processing assembly is arranged above the three-phase separator, and the ultrasonic processing assembly includes a hollow fiber membrane, a hollow fiber There is a superoxide combination pipe body above the membrane, and the superoxide combination pipe body is connected to the superoxide assembly respectively. The superoxide assembly is composed of a low-frequency ultrasonic vibrator and an air pump. The loss of the medium shortens the initial start-up time, realizes the microcirculation flow of the internal medium, improves the mass transfer effect, and ensures the stable operation of the denitrification process.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a high ammonia nitrogen autotrophic denitrification device. Background technique [0002] Water is the source of life and the basic element for human survival. It maintains human survival, guarantees human production, and continues human development. China has a total of 2.81×10 fresh water 12 m 3 , of which surface water is 2.7×10 12 m 3 , groundwater 0.88×10 12 m 3 , is the sixth largest country with fresh water, but the per capita fresh water is only 25% of the world average. In addition, the uneven distribution of water resources in space and time in my country also makes the current situation of water resources more severe. With the increase of agricultural, industrial and domestic water consumption, the lack of water resources will greatly restrict the development of my country. Due to nitrogen pollution, water bodies The frequent occurrence o...

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Problems solved by technology

[0003] For the treatment of high ammonia nitrogen wastewater, the most commonly used methods are physical chemical method and biological treatment method. The physical chemical method needs to consume a large amount of chemicals, the treatment cost is high, and it is easy to cause secondary pollution. Biological treatment The commonly used method is the whole autotrophic denitrification process. The whole autotrophic denitrification reaction process includes nitrosation reaction and anaerobic ammonium oxidation reaction. First, AOB converts ammonia nitrogen into nitrite nitrogen, and the process is carried out under aerobic conditions; then , AnAOB uses the converted nitrite nitrogen as the electron acceptor to convert the remaining ammonia nitrogen into nitrogen gas, and this process is completed under anaerobic conditions

Although the full autotrophic denitrification process can significantly reduce operating costs and reduce the emission of more greenhouse gas nitrous oxide compared with physical and chemical methods, there are still certain technical problems in this technology, such as the initial start-up of anaerobic ammonium oxidation. The medium sludge is easy to lose, which makes it difficult to improve the treatment capacity of the reactor

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