High-concentration ammonia nitrogen biochemical treatment device

By designing a biochemical treatment device for high concentration ammonia nitrogen, adjusting the process sequence of nitration tanks and denitrification tanks, and adding secondary nitration treatment, the problem of unsatisfactory removal of ammonia nitrogen and total nitrogen in high concentration ammonia nitrogen wastewater is solved, and the effect of efficient removal and energy consumption reduction is achieved.

CN222684428UActive Publication Date: 2025-03-28NANJING HUAGONG INNOVATION ENVIRONMENT RES INST CO LTD
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Patent Information

Application Number
CN202420844090.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-23
Publication Date
2025-03-28
Estimated Expiration
2034-04-23

AI Technical Summary

Technical Problem

When the existing biochemical processes treat high-concentration ammonia nitrogen wastewater, the ammonia nitrogen removal effect is not ideal, and the nitration reflux ratio is large, and the energy consumption is high, which affects the removal of total nitrogen.

Method used

A high-concentration ammonia nitrogen biochemical treatment device was designed, including a primary nitration tank, a denitrification tank, a secondary nitration tank and a precipitation tank. By adjusting the process sequence of the nitrification tank and a denitrification tank, the nitrification liquid reflux ratio is reduced, and secondary nitration is added at the back end of the denitrification tank to further remove ammonia nitrogen and carbon sources.

Benefits of technology

High-efficiency ammonia nitrogen and total nitrogen removal of high-concentration ammonia nitrogen wastewater is achieved, reducing the reflux ratio of nitrate liquid, reducing energy consumption, and avoiding the exceeding of the effluent COD standard.

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Abstract

The utility model relates to the technical field of water treatment, and discloses a high-concentration ammonia nitrogen biochemical treatment device which comprises a primary nitrification tank, a denitrification tank, a secondary nitrification tank and a sedimentation tank, the primary nitrification tank is connected with the denitrification tank through a first water overflow pipe, the denitrification tank is connected with the secondary nitrification tank through a second water overflow pipe, and the sedimentation tank is connected with the secondary nitrification tank through a third water overflow pipe. The secondary nitrification tank is connected with the sedimentation tank through a third water overflow pipe, a water inlet pipe is arranged at the top of the primary nitrification tank, a water outlet pipe is arranged on the side wall of the sedimentation tank, a pH meter and an alkali adding system are arranged at the top of the primary nitrification tank, a carbon source adding system and an ORP instrument are arranged at the top of the denitrification tank, and a sludge return pipe is arranged on the side wall of the sedimentation tank. And the other end of the sludge return pipe extends into the primary nitrification tank. According to the utility model, high denitrification dissolved oxygen caused by backflow of high-proportion digestion liquid can be avoided, and the problem that a large number of denitrification carbon sources need to be added is solved.
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