Biological denitrification nitrogen removal experimental device

By employing a mixed packing layer and a real-time monitoring system in the denitrification unit, precise carbon source addition and backwashing were achieved, solving the problems of poor synergy between sulfur autotrophic and heterotrophic denitrification and uneven carbon source addition in existing units, thus improving denitrification efficiency and stability.

CN121361893APending Publication Date: 2026-01-20ZHONGXIN LIANKE ENVIRONMENTAL TECH (ANHUI) CO LTD
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Patent Information

Application Number
CN202511751770.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-26
Publication Date
2026-01-20

AI Technical Summary

Technical Problem

Existing laboratory denitrification devices are difficult to synergistically leverage the advantages of sulfur autotrophic and heterotrophic denitrification. They suffer from uneven water distribution, inability to effectively monitor water quality changes along the reactor, and easy clogging of the packing layer. Furthermore, adding a carbon source at a single inlet can easily lead to excessive chemical oxygen demand in the effluent.

Method used

A mixed packing layer consisting of ceramsite and sulfur autotrophic denitrification packing at a volume ratio of 2:1 is used. Combined with a real-time monitoring system and power components, the carbon source is precisely added through mechanical structures such as a rotating sleeve, piston, and retaining ring. The backwashing system prevents clogging and ensures denitrification efficiency and stability.

Benefits of technology

It improved the denitrification rate, avoided an increase in effluent sulfate concentration and a decrease in pH, reduced operating costs, reduced the risk of secondary pollution, and improved the accuracy of experiments and the potential for process optimization.

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Abstract

The invention discloses a biological denitrification nitrogen removal experiment device, and relates to the technical field of biological denitrification nitrogen removal, the biological denitrification nitrogen removal experiment device comprises a reaction tower main body and a water storage tank group, the water storage tank group is located on the side of the reaction tower main body and is responsible for liquid storage, a baffle is fixed on the inner wall of the reaction tower main body through welding, and a middle through pipe is mounted in the reaction tower main body; the denitrification process is synergistically optimized, the denitrification efficiency and stability are improved, the mixed filler layer composed of ceramsite and sulfur autotrophic denitrification filler according to the volume ratio of 2: 1 is adopted, the advantages of sulfur autotrophic denitrification and heterotrophic denitrification are effectively combined, and the synergistic effect not only accelerates the denitrification rate, but also improves the denitrification efficiency and stability. The problems that the concentration of sulfate radicals in effluent is increased, the pH value is reduced and the like due to single sulfur autotrophic denitrification are solved, meanwhile, due to the reasonable structural design of the filler layer and the backwashing system, filler blockage is avoided, and long-term stable operation of the experimental device and reliability of the denitrification effect are ensured.
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