Method for shortcut nitrification of ammonia-nitrogen wastewater and application

By using low-concentration cerium to enrich heterotrophic nitrophic bacteria in the short-range nitration process and promoting the synergistic effect of autotrophic and heterotrophic nitrophic bacteria, the problems of nitrogen loss and high greenhouse gas emissions in the short-range nitration process are solved, and efficient and low-cost ammonia nitrogen wastewater treatment is achieved.

CN119707111AActive Publication Date: 2025-03-28JIANGXI UNIV OF SCI & TECH
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Patent Information

Application Number
CN202411815317.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-11
Publication Date
2025-03-28
Estimated Expiration
2044-12-11

AI Technical Summary

Technical Problem

Short-range nitration processes are prone to problems such as nitrogen loss, reduction of nitrite and N2O emissions during long-term operation, resulting in high greenhouse gas emissions and increased treatment costs.

Method used

By using low concentration of cerium, endogenous heterotrophic nitroscopic bacteria are selectively enriched and working in concert with autotrophic nitroscopic bacteria, regulating the metabolic types of endogenous organic matter and promoting close cooperation between autotrophic and heterotrophic nitroscopic bacteria.

Benefits of technology

It significantly improves the accumulation rate and yield of nitrite, reduces the emission of greenhouse gases such as N2O, reduces nitrogen loss, and achieves low energy consumption and low cost ammonia nitrogen wastewater treatment.

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Abstract

The invention relates to the technical field of biological sewage treatment, and provides an ammonia-nitrogen wastewater shortcut nitrification method and application. The method comprises the following steps: S100, inoculating mature autotrophic short-cut nitrification sludge into a reactor to obtain a first mixed solution; s200, conveying water containing ammonia salt, bicarbonate and phosphate into the reactor through a water inlet pump; s300, mixing the first mixed solution with water through a stirrer, and carrying out an aeration reaction to obtain a second mixed solution; s400, stirring of the second mixed solution is stopped, aeration and pH control are carried out, solid-liquid separation is carried out, and treated water and sludge are obtained; s500, starting a water outlet pump, and uniformly discharging the treated water; and S600, the steps S200 to S500 are repeated, a cerium chloride solution is added, and long-term operation is carried out. According to the method, low-concentration cerium is used for selectively enriching endogenous heterotrophic nitrite bacteria, and cerium ions and autotrophic nitrite bacteria work cooperatively, so that the accumulation rate of nitrite is increased.
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