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A device and method for multi-stage a/o biological denitrification based on urban sewage short-cut nitrification-ANAMMOX

An anaerobic ammonia oxidation and urban sewage technology, applied in the field of sewage biological treatment, can solve the problems of long doubling time and low cell yield, and achieve the effect of reducing carbon footprint, low sludge production and improving denitrification efficiency.

Active Publication Date: 2017-06-06
BEIJING UNIV OF TECH +1
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AI Technical Summary

Problems solved by technology

Low cell yield and long doubling time due to autotrophic denitrification by anammox bacteria utilizing inorganic carbon sources

Method used

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  • A device and method for multi-stage a/o biological denitrification based on urban sewage short-cut nitrification-ANAMMOX

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Embodiment Construction

[0025] Combine below figure 1 The present invention is further described, as figure 1As shown, the multi-stage A / O biological denitrification device based on urban sewage short-range nitrification-anaerobic ammonium oxidation is characterized in that it includes sequentially connected domestic sewage raw water tank (1), SBR reactor (2), intermediate water tank (3), multi-stage A / O reactor (4) and settling tank (5); described urban sewage raw water tank (1) is provided with overflow pipe (1.1) and vent pipe (1.2); urban sewage raw water tank (1) be connected with the water inlet pipe of SBR reactor (2) by the first water inlet pump (2.1); Intermediate water tank (3) is provided with overflow pipe (3.1) and vent pipe (3.2); Enter the multi-stage A / O reactor (4) from the second water inlet pump (2.2) through the intermediate water tank (3); the multi-stage A / O reactor (4) alternates from the first anoxic zone (4.1) to the subsequent The 4 sets of aerobic zones and anoxic zones ...

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Abstract

The invention discloses a multi-stage A / O biological nitrogen removal device and a multi-stage A / O biological nitrogen removal method based on shortcut nitrification-anaerobic ammonia oxidation of municipal sewage, and belongs to the field of sewage biological treatment. The device mainly consists of an SBR (styrene butadiene rubber) carbon removal reactor, a middle water tank, a multi-stage A / P nitrogen removal reactor and a sedimentation tank, wherein domestic sewage firstly enters the SBR reactor to aerate to remove part of organic substances in raw water, and then enters the A / O reactor to realize shortcut nitrification-anaerobic ammonia oxidation by virtue of alternating aerobic / anoxic reaction. Sludge in a secondary sedimentation tank flows back to a first-section anoxic zone, so that nitric nitrogen in the flowed-back sludge can be reduced by utilizing COD (chemical oxygen demand) in raw material while the concentration of sludge in the A / O reactor is guaranteed. According to the multi-stage A / O biological nitrogen removal device, shortcut nitrification and anaerobic ammonia oxidation reaction of the domestic sewage are realized by utilizing low-oxygen aeration and bio-contact oxidation, so that the aeration rate is low, and the sludge yield is low; and moreover, an external carbon source is not required to add, so that the multi-stage A / O biological nitrogen removal device has the characteristics of energy saving and consumption reducing, improves the stability of the reactor, and is convenient to operate.

Description

technical field [0001] The invention relates to a multi-stage A / O biological denitrification device and method based on urban sewage short-range nitrification-anammox oxidation, which belongs to the field of sewage biological treatment. Background technique [0002] Eutrophication of water bodies is mainly caused by nitrogen and phosphorus in sewage, which not only deteriorates the urban water environment, but also endangers drinking water sources, and has a very large impact on production and life. Therefore, under the circumstances of the current energy crisis and the existing large energy-consuming sewage treatment plants, it is of great significance to realize the sustainable development of sewage treatment with high efficiency and low consumption. [0003] Short-cut nitrification is stopped by controlling the oxidation of ammonia nitrogen to nitrite, without further oxidation to nitrate. Anammox bacteria use the reaction of ammonia nitrogen and nitrite to produce nitro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 王淑莹张倩苗圆圆彭永臻张健伟王梅香
Owner BEIJING UNIV OF TECH
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