A stage state driven autotrophic denitrification nitrogen removal system and method

By using stratified water distribution and internal recirculation coupling technology, combined with monitoring of stratum state index and cumulative load value, the internal reaction process of the autotrophic denitrification filter was finely regulated, solving the problems of stratum reaction state identification and uneven load distribution, and improving the stability and adaptability of the system.

CN122276973APending Publication Date: 2026-06-26新乡市利康生物科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
新乡市利康生物科技有限公司
Filing Date
2026-04-16
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing autotrophic denitrification filters suffer from problems such as coarse particle size adjustment during operation, difficulty in accurately identifying the reaction status of different internal layers, uneven load distribution between upstream and downstream sections, insufficient maintenance of microbial activity under low load conditions, and rapid consumption of local filter media.

Method used

By employing methods such as stratified water distribution, internal recirculation coupling, multi-parameter status identification, layer responsibility rotation, low-load survival, and event-triggered local recovery, the influent and recirculation volumes of each reaction layer are adjusted through stratified water distribution units and internal recirculation units. Combined with parameters collected by online monitoring units, layer status indices and cumulative load values ​​are constructed to achieve continuous and precise regulation of the internal reaction process of the filter.

Benefits of technology

It improves the precision of filter operation control, alleviates the problem of uneven load between the upstream and downstream sections, reduces local filter media consumption, enhances the system's adaptability to changes in water quality, quantity, and temperature, and ensures the maintenance and rapid recovery of microbial activity under low load conditions.

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Abstract

This invention discloses a staged state-driven autotrophic denitrification system and method, relating to the field of denitrification technology. The system includes an influent regulation unit, an autotrophic denitrification filter unit, a stratified water distribution unit, an internal recirculation unit, an online monitoring unit, a control unit, and a backwashing and recovery unit. The autotrophic denitrification filter unit is a single-tank structure with a dedicated autotrophic denitrification filter media layer, divided into two or more reaction stages. The stratified water distribution unit supplies water to different reaction stages separately. The internal recirculation unit recirculates the effluent from the middle and / or later stages back to the front and / or middle stages. The online monitoring unit collects influent, effluent, and operating parameters of each reaction stage. This system and method enable continuous and precise regulation of the internal reaction process of the autotrophic denitrification filter, which is beneficial for improving load distribution among stages, reducing excessively rapid consumption of local filter media, and improving the stability of low-load operation and recovery operation.
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Citation Information

Patent Citations

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  • Autotrophic nitrogen removal multi-grid regulation and control device and sewage nitrogen removal method

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