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Based on deamox enhanced improved segmented water intake a 2 Device and method for process biological nitrogen and phosphorus removal

A technology of staged water inflow and biological denitrification, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc. The effect of simple upgrading and easy promotion and application

Active Publication Date: 2017-11-07
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 Standards for Urban Sewage Treatment Plants" (GB18918-2002), and the most important thing is that the effluent TN cannot stably meet the standards

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  • Based on deamox enhanced improved segmented water intake a <sup>2</sup> Device and method for process biological nitrogen and phosphorus removal

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Embodiment approach

[0022] 1) Inoculate activated sludge from traditional sewage treatment plants with MLSS>8000mg / L, MLVSS / MLSS>0.65, and SV2 In / O15, the sludge concentration in anaerobic zone 3 was 5000mg / L.

[0023] 2) Domestic sewage passes through the main water inlet pipe 10, enters the anaerobic zone 3 through the first control gate valve 11, enters the second anoxic zone 6 through the second control gate valve 13, enters the third anoxic zone 8 through the third control gate valve 14, and enters Water accounts for 40%, 30%, and 30% of the total raw water respectively.

[0024] 3) The domestic sewage enters the anaerobic zone 3 from the water tank 1 through the water inlet pump 2 and the main water inlet pipe 10 through the first control gate valve 11, and simultaneously enters the reflux from the bottom of the secondary sedimentation tank 17 through the sludge reflux pump 22 For sludge, the average hydraulic retention time HRT is controlled at 1.5h, and anaerobic phosphorus release react...

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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 applicable to the technical fields of sewage treatment such as the upgrading and reconstruction of new sewage plants and existing sewage plants, the treatment of municipal sewage and industrial waste water, and the like. Background technique [0002] The C / N ratio of urban sewage in my country is relatively low, and the easily degradable carbon sources that can be used for anaerobic phosphorus release and denitrification denitrification are even lower, posing a great challenge to sewage treatment. At present, many sewage treatment plants in my country cannot stably meet the first-level A discharge standards of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002), and the most critical thing is that the effluent TN cannot stably meet the standards. [0003] In recent years, the anammox technology has been gradually develope...

Claims

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Application Information

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