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Control method of integrated membrane biological reaction device based on short-cut nitrification and denitrification

A technology of membrane bioreaction and control method, which is applied in the field of control of integrated membrane bioreactor devices, can solve problems such as constraints, slow growth rate of nitrifying bacteria, and sensitive external environment, and achieve fast start-up speed, rapid enrichment, and structural flow simple effect

Pending Publication Date: 2020-11-06
宁波中车时代电气设备有限公司
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Problems solved by technology

[0005] However, for the current short-cut nitrification and denitrification system, due to the slow growth rate of nitrifying bacteria and sensitivity to the external environment, how to achieve rapid start-up and stable operation of the system by inhibiting NOB bacteria and enriching AOB bacteria still restricts the application of this technology. key

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  • Control method of integrated membrane biological reaction device based on short-cut nitrification and denitrification
  • Control method of integrated membrane biological reaction device based on short-cut nitrification and denitrification

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Embodiment Construction

[0062] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0063] Such as figure 1 Shown is a preferred embodiment of the integrated membrane bioreactor based on short-cut nitrification and denitrification of the present invention. The integrated membrane bioreactor includes anoxic tank 1, aerobic membrane tank 2, water inlet device 3, backflow device 4, aeration device 5a, online dissolved oxygen meter 5b, first controller 5c, sludge discharge device 6a , an online MLSS instrument 6b, a second controller 6c, a membrane module 7, a water outlet device 8 and a phosphorus removal and dosing device 9.

[0064] Wherein, the anoxic pool 1 is used for denitrification reaction.

[0065] The aerobic membrane tank 2 is used for nitrification reaction, and shares a part of the side wall with the anoxic tank 1 , and the upper part of the side wall has a flow hole 21 communicating with the anoxic tank 1 and the...

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Abstract

The invention discloses a control method of an integrated membrane biological reaction device based on short-cut nitrification and denitrification. The method is characterized by comprising the following steps that: 2.1, raw water and reflux liquid in an aerobic membrane tank (2) enter an anoxic tank (1), and NO2 <-> in the reflux liquid performs denitrification reaction by using organic matters in the raw water as electron donors; 2.2, a mixed solution obtained after the reaction performed in the anoxic tank (1) enters an aerobic membrane tank (2), the dissolved oxygen value of the aerobic membrane tank (2) is controlled to be 0.3-0.5 mg / L, and NH4 <+> is oxidized into NO2 <-> under the action of AOB bacteria; 2.3, the water body is filtered through a membrane assembly (7), and then is discharged, so that purified water can be obtained; 2.4, sludge is discharged out of a system through a sludge discharging device (6a), and the SRT value of the system is controlled to be 8-12 d. Compared with the prior art, the control method can enrich the AOB bacteria, save a carbon source, reduce aeration consumption and improve denitrification efficiency.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a control method of an integrated membrane bioreactor based on short-range nitrification and denitrification. Background technique [0002] Integrated sewage treatment equipment is widely used in rural sewage treatment projects, and the removal of total nitrogen is a key issue that currently plagues integrated sewage treatment equipment to meet the standards. To improve the total nitrogen removal rate, in addition to ensuring the necessary mixed liquor reflux ratio and sufficient nitrification reaction, the carbon-nitrogen ratio (C / N) is the main factor restricting the increase of the total nitrogen removal rate. At present, the main solution is to provide the carbon source required for denitrification through external carbon source, which leads to a large waste of resources. At the same time, the addition of carbon source will also have an adverse effect on the system o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/34C02F1/00C02F101/16
CPCC02F3/302C02F3/34C02F1/008C02F2101/16C02F2209/22
Inventor 黄文庭孔伊芳庞宇龙
Owner 宁波中车时代电气设备有限公司
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