Device and method for deep denitrification by aoa (pd-anammox) biofilm technology

A deep denitrification and biofilm technology, which is applied in chemical instruments and methods, water pollutants, water/sewage multi-stage treatment, etc., can solve the problems of anammox bacteria shedding, achieve enhanced retention, save carbon sources, The effect of reducing floor space and energy consumption

Active Publication Date: 2021-10-26
BEIJING UNIV OF TECH
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Problems solved by technology

However, due to the hydraulic flow caused by mechanical stirring, the anammox bacteria are easy to fall off, so it is necessary to use the fixed bed technology to retain the anammox bacteria

Method used

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  • Device and method for deep denitrification by aoa (pd-anammox) biofilm technology

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Embodiment approach

[0020] AOA (PD-ANAMMOX) biofilm technology deep denitrification device is equipped with raw water tank (1), anoxic grid Ⅰ (4), anoxic grid Ⅱ (5), anoxic grid Ⅲ (6), aerobic grid Ⅰ (7), aerobic grid II (8), aerobic grid III (9), aerobic grid IV (10), rear anoxic grid I (11), rear anoxic grid II (12), rear Anoxic grid III (13), sedimentation grid (14) and carbon source dosing box (18); water tank (1) is connected with anoxic grid I (4) through water inlet pump (2), and anoxic grid III (6) It is connected with the aerobic grid I (7), and the aerobic grid IV (10) is connected with the rear anoxic grid I (11); the carbon source dosing box (18) is connected with the rear anoxic grid through the dosing pump (19) Ⅰ (11), anoxic compartment III (6) is connected to the rear anoxic compartment Ⅰ (11) via a transcendence pump (20), and aerobic compartment Ⅳ (10) is connected to anoxic compartment Ⅰ (4) via a return pump ( 21 ). ) connection; the bottom of aerobic grid I (7), aerobic grid...

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Abstract

A device and method for deep denitrification by AOA (PD‑ANAMMOX) biofilm technology belong to the field of sewage biological treatment. Its device includes raw water tank, anoxic grid (A), aerobic grid (O), rear anoxic grid (PD‑ANAMMOX), and carbon source dosing box. First, the raw water and the returning nitrifying liquid enter the anoxic grid, fully utilize the carbon source in the raw water, and perform a complete denitrification reaction. At the end of the anoxic grid, about 40% to 50% of the mixed solution surpasses the aerobic grid and enters the post-anoxic grid. The other part of the mixed solution enters the aerobic grid under the action of plug flow for nitrification. Then, the nitrifying liquid enters the post-anoxic compartment, and firstly adds sodium acetate as a carbon source for short-range denitrification reaction, and then enters the back anoxic compartment together with the excess sewage to complete the anaerobic ammonium oxidation reaction, and finally, it is discharged after static settling. The invention is suitable for the treatment of low C / N urban domestic sewage and areas where TN is required to be below 10 mg / L, and the effluent quality is stable. Compared with the conventional post anoxic denitrification filter, this process can save aeration energy consumption and carbon source.

Description

technical field [0001] The invention relates to a device and method for deep denitrification by biofilm technology, which belongs to the field of sewage biological treatment, and is applicable to the technical fields of sewage treatment such as upgrading and transformation of existing and newly built sewage plants, treatment of low C / N urban domestic sewage, and the like. Background technique [0002] With the increasingly prominent problem of "eutrophication" in water bodies and stricter sewage discharge standards, sewage treatment technology has moved from the stage of single-purpose removal of organic matter to the advanced treatment stage of both removal of organic matter and denitrification and phosphorus removal, in order to control eutrophication. Nitrogen and phosphorus removal for the purpose of trophication has become one of the research hotspots in the field of sewage treatment. Especially in recent years, in some regional standards, such as DB11 / 890-2012 (Beijing...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/28C02F9/14C02F101/16
Inventor 彭永臻陈凯琦孙事昊贾体沛张亮
Owner BEIJING UNIV OF TECH
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