Method for Nitrification of Low-Carbon and High-Nitrogen Sewage Using Pure Oxygen Aeration

Abstract

The invention provides a device and a method for carrying out a nitration reaction of low-carbon high-nitrogen sewage by virtue of pure oxygen aeration, and belongs to the sewage treatment equipment and the technical field of sewage treatment. The device comprises an aeration tank (1) and a sedimentation tank (2); the device is characterized in that a plurality of parallel partition walls (3) are arranged in the aeration tank (1) to divide the aeration tank (1) into a plurality of aeration chambers, an aerator (4) is mounted in each aeration chamber, a water inlet is formed at one end of the aeration tank (1), a water outlet is formed at the other end of the aeration tank (1) and communicated with the water inlet of the sedimentation tank (2), the sedimentation tank (2) is provided with a water outlet and a reflux opening, and the reflux opening of the sedimentation tank (2) is communicated with the aeration tank (1). The device for carrying out the nitration reaction of low-carbon high-nitrogen sewage by virtue of pure oxygen aeration does not need to add a carbon source, and is high in oxygen utilization rate, and capable of effectively removing ammonia nitrogen and organic matters; besides, the device is capable of reducing the working cost, and suitable for universal use.

Description

technical field [0001] The invention discloses a method for carrying out nitrification reaction of low-carbon and high-nitrogen sewage by using pure oxygen aeration, which belongs to the field of sewage treatment equipment and technology, and specifically relates to a device and method for nitrification reaction of low-carbon and high-nitrogen sewage. Background technique [0002] Low-carbon and high-nitrogen sewage mainly comes from coking sewage, landfill leachate, chemical fertilizer sewage, aquaculture sewage anaerobic nitrification liquid, etc. The low-carbon and high-nitrogen sewage of the water supply and drainage plant comes from chemical sewage. The amount of sewage is about 100m 3 / h, COD Cr It is 90-160 mg / L, with an average of 108 mg / L, and ammonia nitrogen is between 90-360 mg / L, with an average of 118 mg / L. At present, the nitrification process of biological denitrification is mainly that nitrous bacteria convert ammonia nitrogen into nitrite nitrogen, and n...

AI Technical Summary

Problems solved by technology

For low-carbon and high-nitrogen sewage, high concentrations of ammonia nitrogen and nitrite inhibit the growth of nitrifying bacteria, and the carbon source of sewage is insufficient, which affects the establishment of nitrification reaction

Therefore, low-carbon and high-nitrogen sewage treatment requires an additional carbon source, which increases the cost of sewage treatment

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