Device and method for biological nitrogen and phosphorus removal on basis of DEAMOX enhanced and improved step-feed A2/O technology

A technology of biological denitrification and segmental water inflow, which is applied in chemical instruments and methods, water pollutants, water/sludge/sewage treatment, etc., can solve the problem that the effluent TN cannot meet the standard stably, and achieve saving of carbon source dosage, The effect of reducing disposal costs and saving aeration volume

Active Publication Date: 2016-01-06
BEIJING UNIV OF TECH
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Problems solved by technology

At present, many sewage treatment plants in my country cannot stably meet the first-level A discharge standards of the "Pollutant Discharge Sta

Method used

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  • Device and method for biological nitrogen and phosphorus removal on basis of DEAMOX enhanced and improved step-feed A2/O technology

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Embodiment approach

[0022] 1) Inoculate activated sludge from traditional sewage treatment plants, and its MLSS> 8000mg / L, MLVSS / MLSS> 0.65, SV 2 / O(15), make the sludge concentration of anaerobic zone (3) 5000mg / L.

[0023] 2) Domestic sewage passes through the inlet main pipe (10), enters the anaerobic zone (3) through the control gate valve (11), the control gate valve (13) enters the second hypoxic zone (6), and the control gate valve (14) enters the third In the hypoxic zone (8), the proportion of influent water to the total raw water is 40%, 30%, and 30% respectively.

[0024] 3) Domestic sewage enters the anaerobic zone (3) through the control gate valve (11) from the water tank (1) through the inlet pump (2) and the main water inlet pipe (10), and also comes from the bottom of the secondary sedimentation tank (17). The average hydraulic retention time HRT of the return sludge drawn back by the sludge return pump (22) is controlled at 1.5h, and the anaerobic phosphorus release reaction is carri...

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Abstract

The invention provides a device and method for biological nitrogen and phosphorus removal on the basis of a DEAMOX enhanced and improved step-feed A2/O technology, and belongs to the field of activated sludge process sewage processing. The device is mainly formed by connecting a water tank (1), an improved step-feed A2/O (15) and a secondary sedimentation tank (17) in sequence. According to the method, under the low-C/N-ratio condition, short-cut denitrification is achieved by controlling the average hydraulic stay time (HRT) of anoxic zones, and reaction substrate nitrite nitrogen is provided for anaerobic ammonium oxidation bacteria. By feeding biological filler to the first anoxic zone (4), the second anoxic zone (6) and the third anoxic zone (8) to provide growth carriers for the anaerobic ammonium oxidation bacteria. On the basis of denitrification performed in the anoxic zones, short-cut denitrification and the Anammox (anaerobic ammonia oxidation reaction) are increased, ammonia nitrogen and nitrite nitrogen are used by the anaerobic ammonium oxidation bacteria for Anammox nitrogen removal, and nitrogen and phosphorus removal of municipal sewage is achieved. The device is suitable for treatment of urban sewage with low carbon and nitrogen ratio, the technology is advanced, the quality of outflow water is stable, the energy-saving consumption-reducing advantages are remarkable.

Description

Technical field [0001] The invention relates to the technical field of sewage treatment by activated sludge method, and is suitable for the technical fields of sewage treatment such as newly-built sewage plants and upgrading and transformation of established sewage plants, treatment of municipal sewage and industrial waste water. Background technique [0002] The C / N ratio of urban sewage in my country is relatively low, and the easily degradable carbon source that can be used for anaerobic phosphorus release and denitrification and nitrogen removal is lower, which poses a great challenge to sewage treatment. At present, many sewage treatment plants in my country cannot stably meet the Class A discharge standard of the Pollutant Discharge Standard for Urban Sewage Treatment Plants (GB18918-2002). The most important thing is that the effluent TN cannot meet the standard stably. [0003] In recent years, anammox technology has been gradually developed and applied as one of the high-e...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F101/16C02F101/10
Inventor 彭永臻李健伟马斌王淑莹
Owner BEIJING UNIV OF TECH
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