A strain-piezoelectric material synergistic denitrification system and its application

By loading barium strontium titanate onto the surface of Streptomyces denitrifying bacteria and utilizing mechanical energy to excite the piezoelectric effect to provide electron donors, the problem of slow nitrate removal rate by Streptomyces microorganisms was solved, achieving efficient and stable denitrification effect and avoiding secondary pollution and increased costs.

CN121470676BActive Publication Date: 2026-05-26XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Patent Information

Application Number
CN202511992766.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-12-26
Publication Date
2026-05-26
Estimated Expiration
2045-12-26

AI Technical Summary

Technical Problem

In existing technologies, Streptomyces microorganisms have slow nitrate removal rates and long reaction cycles during denitrification, which are difficult to meet actual treatment needs. Furthermore, traditional biological denitrification requires the addition of organic carbon sources, which may lead to secondary pollution and increased costs.

Method used

A strain-piezoelectric material synergistic denitrification system was constructed by loading barium strontium titanate onto the surface of Streptomyces denitrifying bacteria. Mechanical energy was used to excite the piezoelectric effect to provide electron donors for the microorganisms, thus constructing a mechanical energy-driven synergistic denitrification system to achieve continuous and efficient transfer of electron donors.

Benefits of technology

It significantly improves the nitrogen removal rate, shortens the reaction cycle, achieves an efficient and stable denitrification process, avoids the risk of secondary pollution caused by the addition of organic carbon sources, and meets the denitrification requirements for in-depth water treatment.

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Abstract

This invention belongs to the field of water treatment denitrification technology, specifically relating to a strain-piezoelectric material synergistic denitrification system and its application. This strain-piezoelectric material synergistic denitrification system includes *Streptomyces* denitrifying bacteria and barium strontium titanate, with the barium strontium titanate loaded on the surface of the *Streptomyces* denitrifying bacteria. This invention induces a piezoelectric effect in the barium strontium titanate through mechanical feeding, providing an electron donor for the *Streptomyces* denitrifying bacteria, thus improving electron transfer efficiency and consequently increasing denitrification efficiency. Experiments show that under optimal conditions of 0.5 g / L barium strontium titanate concentration and 400 r / min stirring speed, the total nitrogen and nitrate nitrogen removal rates of this system are higher than those of strain DD alone, while the total organic carbon removal rate is also significantly improved.
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