A method for strengthening double short-cut anaerobic ammonia oxidation of municipal sewage by means of intermittent aeration and segmented water feeding

By enhancing the dual-short-cut anaerobic ammonia oxidation process for urban wastewater through intermittent aeration and segmented water intake, the problem of low nitrogen removal efficiency in urban wastewater with low C/N ratios was solved, achieving efficient and energy-saving wastewater treatment.

CN117417058BActive Publication Date: 2026-03-20BEIJING UNIV OF TECH
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Patent Information

Application Number
CN202311565853.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-11-22
Publication Date
2026-03-20
Estimated Expiration
2043-11-22

AI Technical Summary

Technical Problem

In traditional wastewater treatment, urban wastewater with low C/N ratios has low denitrification efficiency, slow growth of anaerobic ammonia oxidizing bacteria, high aeration energy consumption, large carbon source consumption, unstable short-cut nitrification, and long endogenous denitrification time, making it difficult to meet strict denitrification standards.

Method used

Intermittent aeration and segmented water intake are adopted. Intermittent aeration maintains short-cut nitrification stability and controls nitrite concentration. Segmented water intake stores internal carbon sources and supplements external carbon sources, optimizes anaerobic ammonia oxidation reaction conditions, and improves nitrogen removal efficiency.

Benefits of technology

It achieves efficient deep denitrification of urban wastewater with low C/N ratio, reduces aeration energy consumption and carbon source consumption, and improves the contribution rate, stability and efficiency of anaerobic ammonia oxidation denitrification. It is suitable for the treatment of urban wastewater with low C/N ratio.

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Abstract

The application discloses a method for strengthening double short-cut anaerobic ammonia oxidation of municipal sewage by means of intermittent aeration and segmented water feeding, and belongs to the field of sewage biological treatment. The double short-cut anaerobic ammonia oxidation is a biological denitrification process dominated by short-cut nitrification, short-cut denitrification and anaerobic ammonia oxidation reaction. The method is characterized in that the double short-cut anaerobic ammonia oxidation process is operated by means of intermittent aeration AOAOAOA, is used for maintaining stable operation of the short-cut nitrification, and provides a stable substrate source for the anaerobic ammonia oxidation bacteria; segmented water feeding is used, 4 / 5 of raw water is pumped into the SBR (Sequencing Batch Reactor) reactor, internal carbon sources are stored under anaerobic conditions, and the remaining 1 / 5 of raw water is pumped into the second aerobic end of the intermittent aeration, so that the COD in the raw water is directly used by the denitrifying bacteria. The method solves the problems of unstable short-cut nitrification, high demand for carbon sources of the short-cut denitrification, long time consumption of the internal source denitrification and the like in the double short-cut anaerobic ammonia oxidation process.
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