Zero-valent iron-pyrite assembly coupled biological membrane sewage treatment device and process

By using zero-valent iron-pyrote assembly coupled with biofilm sewage treatment device in the short-range nitration process, and using sulfur autotrophic denitrification and iron flocculation technology, the problems of insufficient carbon source, poor phosphorus removal effect and inconvenient filler replacement in sewage treatment are solved, efficient sewage nitrogen removal and phosphorus removal effects are achieved, and the filler replacement process is simplified.

CN119707185AInactive Publication Date: 2025-03-28SHANDONG XINSONG IND SOFTWARE RES INST CO LTD +1
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Patent Information

Application Number
CN202510041241.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-10
Publication Date
2025-03-28
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing short-range nitration process is insufficient when treating sewage with low carbon-nitrogen ratio, poor phosphorus removal effect, and inconvenient replacement of solid carbon sources, and high concentrations of nitrite and phosphorus in the effluent.

Method used

The zero-valent iron-pyrote assembly is used to couple the biofilm sewage treatment device, through the coupling of the short-range biofilm reactor body and the zero-valent iron-pyrote outer circulation assembly, the deep denitrification and iron flocculation technology of sewage can be used to achieve deep nitrogen removal and phosphorus removal of sewage, and the external circulation assembly is used to improve the contact uniformity of solid carbon sources and sewage and the convenience of filling replacement.

Benefits of technology

It effectively improves the total nitrogen and total phosphorus removal rate of wastewater, reduces the concentration of nitrite and phosphorus in the effluent, saves the aeration volume and denitrification carbon source injection, and is simple and convenient to replace fillers.

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Abstract

The invention relates to the technical field of wastewater biological treatment, in particular to a zero-valent iron-pyrite assembly coupled biological membrane sewage treatment device and process. The contact uniformity of a solid carbon source and sewage can be improved, the filler replacement convenience is improved, the defect that a short-cut denitrification reactor is insufficient in carbon source can be overcome, the phosphorus removal effect is further improved, and the concentration of nitrite and phosphorus in effluent is reduced; comprising a short-range bio-membrane reactor main body, a zero-valent iron-pyrite external circulation assembly, an external circulation pump and an aeration system, suspended biological filler is arranged in the short-range bio-membrane reactor main body, a settling box with the inner diameter larger than the outer diameter of the short-range bio-membrane reactor main body is arranged at the upper part of the short-range bio-membrane reactor main body, and the aeration system is used for aerating and supplying oxygen to the bottom in the short-range bio-membrane reactor main body; the zero-valent iron-pyrite outer circulation assembly comprises a barrel, a rotating shaft rotationally installed in the barrel, a spiral conveying blade fixedly installed on the rotating shaft, a gear motor providing power for rotation of the rotating shaft and a communicating pipeline.
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