Deamox-based device and method for post-anoxic filter to strengthen aao+baf process for nitrogen and phosphorus removal

A post-anoxic, nitrogen and phosphorus removal technology, which is applied in the field of sewage treatment and activated sludge treatment, and can solve difficult-to-reach problems

Active Publication Date: 2021-03-02
BEIJING UNIV OF TECH
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Problems solved by technology

At present, the effluent TN (total nitrogen, denoted as N) of many water plants is difficult to meet the "Discharge Standard of Pollutants for Urban Sewage Treatment Plants" (GB18918-2002) Class A discharge standard (effluent TN≤15mg / L)

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  • Deamox-based device and method for post-anoxic filter to strengthen aao+baf process for nitrogen and phosphorus removal

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Embodiment Construction

[0026] The DEAMOX-based post-anoxic filter strengthens the AAO+BAF process nitrogen and phosphorus removal device, which is characterized in that: the inlet pump (1) enters the AAO reactor (2), and then connects the secondary sedimentation tank (8), and then connects The biological aerated filter BAF (12) is then connected to the rear anoxic filter (24), and finally the water outlet (28) on the rear anoxic filter (24) is the final treatment water; the AAO reactor (2 ) sequentially includes anaerobic zone (3), anoxic zone (4), and aerobic zone (5) connected sequentially; aerobic tank (5) is connected with secondary sedimentation tank (8) through overflow port (7); The effluent water from the pool (8) flows into the intermediate water tank (9), and enters the biological aerated filter BAF (12) from the intermediate water tank (9) through the BAF inlet pump (11); there is aerobic filler in the biological aerated filter BAF (12) (13), its effluent enters final water tank (10) by B...

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Abstract

The DEAMOX-based device and method for post-anoxic filter strengthening AAO+BAF process for nitrogen and phosphorus removal belong to the field of activated sludge wastewater treatment. Its device is mainly composed of AAO, secondary sedimentation tank, biological aerated filter BAF and post anoxic filter. This method realizes synchronous denitrification and phosphorus removal by controlling the average hydraulic retention time in the anoxic zone between 3-8h under low C / N ratio conditions; realizes efficient nitrification by BAF; Ammonia nitrogen (NH 4 + ‑N) and nitrate nitrogen (NO 3 ‑ ‑N) mix, add carbon source, form short-range denitrification + anaerobic ammonium oxidation DEAMOX reaction in post anoxic filter tank, overcome the disadvantage of nitrate nitrogen in the effluent of AAO+BAF process, and further remove total nitrogen in municipal sewage . The invention is applicable to the construction, upgrading and transformation of municipal sewage plants under the condition of low C / N ratio municipal sewage, and can meet the requirements of ensuring the total nitrogen of effluent and stable effluent quality.

Description

technical field [0001] The invention relates to a device and method for deep nitrogen and phosphorus removal, belongs to the technical field of activated sludge treatment, and is applicable to the technical fields of sewage treatment such as municipal sewage treatment with low C / N ratio, advanced treatment, standard upgrading and transformation. Background technique [0002] With the continuous advancement of urbanization and the continuous improvement of people's living standards in our country, the discharge of urban sewage has increased significantly. The discharge of nitrogen and phosphorus in sewage will cause eutrophication of water bodies. The removal of nitrogen and phosphorus in sewage treatment plants is getting better and better. more and more critical. At present, the effluent TN (total nitrogen, denoted as N) of many water plants is difficult to meet the first-level A discharge standard (effluent TN≤15mg / L) of the Discharge Standard of Pollutants for Urban Sewag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F101/16
CPCC02F3/302C02F2101/16C02F2101/163
Inventor 彭永臻孙事昊陈凯琦贾体沛张亮王淑莹
Owner BEIJING UNIV OF TECH
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