Starting method and application of short-cut denitrification system

A nitrification system, short-range technology, applied in the field of start-up of short-range denitrification system, can solve the problems that the PD system cannot be proposed, and it has not been clearly revealed.

Active Publication Date: 2021-06-22
BEIJING UNIV OF TECH
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Problems solved by technology

Therefore, in a system that can achieve efficient accumulation of nitrite, there seems to be a certain coupling relationship between nitrogen load and C:N, but this coupling mechanism has not been clearly revealed so far, so it is impossible to treat the actual content of different nitrates. The PD system of wastewater proposes a reasonable C:N range

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  • Starting method and application of short-cut denitrification system

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Embodiment 1

[0035] The present embodiment provides a kind of waste water treatment method, adopts such as figure 1 The shown device comprises a PD-SBR reactor 6, a sodium acetate water inlet barrel 1 and a nitrate water inlet barrel 2 connected to it, and a water pump 3, which is used to provide sodium acetate and nitrate in the PD-SBR reactor 6, PD -The agitator 4 is also arranged in the SBR reactor 6, and the device also includes a number of time-controlled switches 5, which are used to control the specific running time of the reaction systems such as water in and out, stirring; the side of the PD-SBR reactor 6 is also provided with a drain valve 7 is communicated with water outlet bucket 8.

[0036] Concrete steps are as follows: get effective volume and be the sequence batch type batch-type PD-SBR reactor of 7.3L (such as figure 1 shown), inoculate the activated sludge in the anoxic tank, and the concentration of suspended solids in the mixed solution is 5g L -1 About, the simulated...

Embodiment 2

[0047] This embodiment provides a kind of waste water treatment method, adopts the equipment identical with embodiment 1, concrete steps are:

[0048] Take a sequencing batch batch PD-SBR reactor with an effective volume of 7.3L, and inoculate the activated sludge from the anoxic pool, and the concentration of suspended solids in the mixed solution is 5g L -1 About, the simulated wastewater containing nitrate, sodium acetate, inorganic salts and trace elements is used as the influent. The temperature is 20±5℃, the pH of the influent is 9.5±0.5, and the hydraulic retention time is set at 25-75min. In the embodiment, it is 75min, the rotating speed is set to 400 ± 10rmp, the dissolved oxygen is 0.2mg / L, and the reactor is run under the condition of no idle time. The amount of sodium acetate added is measured by the COD concentration of the organic matter in the influent, and the operating sequence is: Water intake for 15 minutes, stirring for 30 minutes, sedimentation for 40 min...

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Abstract

The invention belongs to the technical field of water treatment, and particularly relates to a starting method of a short-cut denitrification system. According to the starting method of the short-cut denitrification system, the low-nitrogen load is matched with the low C:N to elutriate infectious microbes, then the low-nitrogen load is matched with the optimal C:N to enrich the nitrite accumulation bacteria under the low load, and finally the high-nitrogen load and the optimal C:N are adopted to enrich the nitrite accumulation bacteria under the high load to start the short-cut denitrification system. The reactor can have high-efficiency nitrite accumulation capacity under different loads, and possibility is created for high-efficiency treatment of nitrate wastewater with different concentrations by a nitrite accumulation type short-cut denitrification process.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a start-up method and application of a short-range denitrification system. Background technique [0002] As a new sustainable biological denitrification technology, anaerobic ammonium oxidation (Anammox) process does not require aeration and organic carbon, and produces less sludge, so it has attracted extensive research interest from scholars. Among them, NO 2 － -N is one of the important substrates of the Anammox reaction, and its stable acquisition is of great significance for the development and application of the Anammox process. [0003] The short-range denitrification (PD) with nitrite as the target product has been proved to provide NO 2 － -N is a very attractive and promising method. However, the nitrite accumulation efficiency of PD will be strongly affected by the influent water quality and operating conditions. The nitrate content in different...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
CPCC02F3/282
Inventor 张莉郝仕伟豆全浩蓝爽
Owner BEIJING UNIV OF TECH
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