Multistage A/O autotrophic denitrification device and method employing half shortcut nitrification-anaerobic ammonia oxidation

A technology of anaerobic ammonium oxidation and semi-short-range nitrification, which is applied in the pre-anoxic field, can solve the problems of high energy consumption, insufficient carbon source, and poor water outlet conditions, and achieve the effects of simple operation, good water outlet effect, and stable operation

Pending Publication Date: 2017-05-10
BEIJING UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of insufficient carbon source for traditional nitrification and denitrification, poor effluent conditions, and high energy consumption by adopting a semi-short-range nitrification-anammox multi-stage A / O autotrophic denitrification device

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  • Multistage A/O autotrophic denitrification device and method employing half shortcut nitrification-anaerobic ammonia oxidation

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Embodiment 1

[0021] In the experiment, domestic decarbonized sewage in the family area of ​​Beijing University of Technology was used as raw water. The specific water quality is as follows: COD concentration is 130-260mg / L; NH 4 + -N concentration 55-90mg / L, NO 2 - -N≤0.5mg / L, NO 3 - -N≤0.5mg / L.

[0022] The specific operation is as follows:

[0023] Sludge from an integrated autotrophic denitrification reactor for urban sewage was used for semi-short-cut nitrification-ANAMMOX experiments. The 1st, 2nd, and 3rd cells in the multi-stage A / O nitrogen removal reactor are anoxic zones, the dissolved oxygen concentration is less than 0.05mg / L, and the stirring speed of anoxic stirring is 40r / min, so as to ensure that the sludge is evenly mixed , without affecting the purpose of sludge aggregation in the reactor; grids 4, 5, and 6 are aerobic zones, and dissolved oxygen is 0.9-1.2mg / L; grids 7, 8, 9, and 10 are anaerobic ammonia Oxidation reaction zone, put packing.

[0024] 1) Sludge in...

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Abstract

The invention provides a multistage A / O autotrophic denitrification device and method employing half shortcut nitrification-anaerobic ammonia oxidation, and belongs to the technical field of biological sewage treatment. The device mainly comprises a raw water tank, a multistage A / O denitrification reactor and a settling pond, wherein the A / O reactor comprises an anoxic zone, an aerobic zone and an anaerobic ammonia oxidation zone; an aerating apparatus is arranged in an anoxic grid; and inner carbon source storage and denitrification are carried out in the anoxic zone, half shortcut nitrification is carried out in the aerobic zone, NH4<+>-N:NO2<->N=1:1 to (1:1.3) of an effluent is ensured, and a proper matrix proportion is provided for anaerobic ammonia oxidation reaction. In the anoxic zone of the A / O device, nitrate nitrogen in return sludge is removed by using denitrification, meanwhile, an inner carbon source is stored, the nitrate nitrogen generated by anaerobic ammonium oxidation bacteria is removed through endogenous denitrification in the subsequent anaerobic ammonia oxidation process, and the effluent effect is improved. Meanwhile, the volume ratio of the anoxic zone / the aerobic zone can be flexibly adjusted according to the inflow water quality, and the multistage A / O autotrophic denitrification device is high in anti-shock loading capability and good in stability and has a very wide application prospect.

Description

technical field [0001] The invention relates to a pre-anoxic method for realizing the stable operation of a semi-short-range nitrification-anammox multi-stage A / O autotrophic denitrification device, and belongs to the technical field of sewage biological treatment. Background technique [0002] With the continuous acceleration of urbanization and the gradual improvement of environmental protection requirements, the number of urban sewage treatment plants is increasing, and the total amount of sewage treatment is also increasing. The traditional urban sewage denitrification process is mainly nitrification-denitrification denitrification. This process consumes a lot of energy in the aerobic aeration process. It is a waste water treatment process with high energy consumption, and the cost of sewage treatment is relatively high. Since the carbon and nitrogen ratio of urban sewage is generally low, it is difficult to meet the carbon source demand of the denitrification process. I...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30C02F3/34C02F101/16
CPCC02F1/52C02F3/305C02F3/34C02F2301/08C02F2301/046C02F2209/15C02F2209/14C02F2209/16C02F2209/08C02F2203/006C02F2101/16Y02W10/10
Inventor 彭永臻王思萌苗圆圆
Owner BEIJING UNIV OF TECH
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