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Device and method for treating low-C/N municipal sewage by pre-positioned short-range denitrification-anaerobic ammonia oxidation

A short-range denitrification and anammox technology, which is applied in the field of pre-short-range denitrification-anammox treatment of low C/N urban sewage, can solve the problem of difficult inhibition of nitrifying bacteria, complex control factors, and influence on denitrification Effect and other issues, to achieve stable effect, simple control and operation, and avoid consumption

Active Publication Date: 2017-12-26
BEIJING UNIV OF TECH
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Problems solved by technology

However, in actual operation, due to the complex control factors and the difficulty in inhibiting nitrifying bacteria, nitrate accumulation often occurs in the effluent, thus affecting the denitrification effect

Method used

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  • Device and method for treating low-C/N municipal sewage by pre-positioned short-range denitrification-anaerobic ammonia oxidation

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] The pre-short-range denitrification reactor (2) is provided with a water inlet (2.2), a water outlet (2.3), an aeration head (2.4), an air pump (2.5), an electronic flow meter (2.6), a first stirring device ( 2.7), drain valve (2.8) and portable dissolved oxygen analyzer (2.9); described intermediate water tank (3) is provided with overflow pipe (3.1) and vent pipe (3.2); described anaerobic ammonia oxidation reactor ( 4) It is equipped with water inlet (4.2), return pipe (4.3), return pump (4.4), outlet pipe (4.5) and three-phase separator (4.6); the raw water tank (1) passes through the first peristaltic pump (2.1) and The water inlet (2.2) of the pre-short-range denitrification reactor (2) is connected; the outlet water of the pre-short-range denitrification reactor (2) is discharged into the intermediate water tank (3); the...

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Abstract

The invention provides a device and a method for treating low-C / N municipal sewage by pre-positioned short-range denitrification-anaerobic ammonia oxidation and belongs to the technical field of biological sewage treatment. The device provided by the invention comprises a raw water tank, a pre-positioned short-range denitrification reactor, an intermediate water tank and an anaerobic ammonia oxidation reactor. The method comprises the following steps: firstly, enabling the municipal sewage to enter the pre-positioned short-range denitrification reactor and carrying out short-range denitrification by utilizing organic matters in domestic sewage and nitric nitrogen which is remained on the last period; secondly, enabling the sewage into an anaerobic ammonia oxidation reactor and carrying out autotrophic nitrogen removal; meanwhile, draining water from the pre-positioned short-range denitrification reactor and carrying out aerobic aeration to generate the nitric nitrogen. According to the device and the method, provided by the invention, a carbon source in domestic sewage can be sufficiently utilized for carrying out the short-range denitrification and the ratio of an anaerobic ammonia oxidation substrate is controlled through a water draining ratio, so that energy sources are saved; the device and the method are easy to control and high in stability, and an effective way is provided for application of a mainstream anaerobic ammonia oxidation technology and deep denitrification of the low-C / N municipal sewage.

Description

technical field [0001] The invention relates to a method for treating low C / N urban sewage with low energy consumption, which belongs to the technical field of sewage treatment, and in particular to a device and method for pre-short-range denitrification-anammox treatment of low C / N urban sewage. Background technique [0002] With the continuous advancement of urbanization and the continuous improvement of people's living standards, the discharge of urban sewage has increased significantly, and the eutrophication of urban sewage has further aggravated due to the excessive nitrogen and phosphorus in sewage. Therefore, sewage treatment plants need to use The nitrogen and phosphorus in the sewage are discharged into the water body after reaching the standard. Biological denitrification technology is the most widely used denitrification technology at present, while the traditional biological denitrification technology achieves the removal of total nitrogen through the whole proc...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/305C02F3/307
Inventor 彭永臻买文可吉建涛吴蕾李夕耀
Owner BEIJING UNIV OF TECH
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