Composite fiber woven net active microbial carrier for treating nitrogen-containing wastewater as well as preparation method and application of composite fiber woven net active microbial carrier

By designing a composite fiber mesh active microbial carrier, the problems of anaerobic ammonia oxidation microorganisms proliferation and biofilm formation in the reactor were solved, achieving efficient denitrification and rapid reactor start-up, avoiding microplastic pollution, and conforming to the concept of low carbon and environmental protection.

CN121653115AActive Publication Date: 2026-03-13DONGHUA UNIV
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Patent Information

Application Number
CN202610155276.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-04
Publication Date
2026-03-13
Estimated Expiration
2046-02-04

AI Technical Summary

Technical Problem

Existing anaerobic ammonia-oxidizing microorganisms exhibit slow proliferation rates, poor aggregation performance, and significant loss in reactors. Traditional biofilm carrier materials also suffer from aging and lysis, microplastic contamination, low biofilm formation efficiency, and long reactor start-up times.

Method used

The active microbial carrier is made of composite fiber mesh, which is woven from titanium wire, rock wool wire, iron-carbon stranded wire and PLA wire. Rock wool wire provides high specific surface area and fiber network structure, titanium wire provides biocompatibility and corrosion resistance, iron-carbon stranded wire forms a galvanic cell to release ferrous ions, and PLA wire provides a slow-release carbon source. The permeability coefficient and iron ion release rate are controlled by the weaving method.

Benefits of technology

It promotes efficient biofilm formation in anammox sludge, shortens reactor start-up time, improves denitrification efficiency, avoids microplastic pollution, reduces carbon source addition, adapts to the denitrification needs of various microbial reactors, and possesses both mechanical strength and environmental friendliness.

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Abstract

The invention discloses a composite fiber woven net active microbial carrier for treating nitrogen-containing wastewater as well as a preparation method and application of the composite fiber woven net active microbial carrier. The active microbial carrier is formed by weaving titanium wires, rock wool wires, iron-carbon twisted wires and PLA wires, has high biocompatibility and high specific surface area, keeps high mechanical strength, can promote efficient biofilm formation of denitrification sludge, and can promote quick start of a reactor and improve the denitrification effect after successful biofilm formation. According to the application, the requirements of'plastic reduction and plastic forbidding 'are met, the traditional plastic biological filler is replaced, the technical problem that micro-plastic particles are released due to degradation in the use process of the filler is solved, the requirement of green development is met, and remarkable economic and ecological environment values are achieved. Iron wires and carbon fibers in the iron-carbon stranded wires form a primary battery in the reactor, controllable dissolution of iron ions is spontaneously accelerated, driving is not dependent on external potential, and the concept of low carbon and environmental protection is met; additional carbon source adding is reduced through the PLA filaments, and the PLA filaments are further matched with the low-carbon and environment-friendly concept.
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