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Municipal sewage treatment system

A technology for treating system and municipal sewage, applied in the field of sewage treatment, can solve the problems of difficult control of process indicators, high cost, unsatisfactory effect of denitrification and dephosphorization, etc. effect of effect

Pending Publication Date: 2021-10-01
TSINGHUA UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problems of high cost in the existing biological nitrogen and phosphorus removal process and unsatisfactory effect of nitrogen and phosphorus removal due to difficult control of process indicators, the present invention proposes a new municipal sewage treatment system

Method used

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  • Municipal sewage treatment system
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Embodiment 1

[0046] see figure 1 , This embodiment provides a municipal sewage treatment system, the unit structure of which includes an anaerobic unit 1 , anoxic unit 2 , aerobic unit 3 , post-anoxic unit 4 and MBR unit 5 .

[0047] The outlet of the anaerobic unit 1 is connected to the inlet of the anoxic unit 2 through a first pipeline 6;

[0048] The outlet of the anoxic unit 2 is connected to the inlet of the aerobic unit 3 through a second pipeline 7;

[0049] The outlet of the aerobic unit 3 is connected with the inlet of the rear anoxic unit 4 through a third pipeline 8;

[0050] The outlet of the post anoxic unit 4 is connected with the inlet of the MBR unit 5 through a fourth pipeline 9;

[0051] The return port of the MBR unit 5 is connected to the inlet of the aerobic unit 3 through the fifth pipeline 10;

[0052] The return port of the rear anoxic unit 4 is connected to the inlet of the anoxic unit 2 through a sixth pipeline 11;

[0053] The return port of the anoxic unit ...

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Abstract

The invention relates to the technical field of sewage treatment, in particular to a municipal sewage treatment system. According to the municipal sewage treatment system provided by the invention, an A2O process, a post-anoxic unit and a MBR unit are coupled for treatment, and the reflux point location of the whole process is controlled. According to the invention, the post-anoxic unit is additionally arranged between an aerobic unit and the MBR unit of the A2O process to further carry out denitrification nitrogen removal, so that the total nitrogen removal efficiency is improved, and the concentration of nitrogen oxides is reduced; and meanwhile, the reflux point location of the whole process is controlled, so that the ORP of an anaerobic unit is reduced, and the phosphorus removal effect is favorably improved. The treatment system disclosed by the invention is simple in structure and low in cost, and does not need other energy-consuming treatment technologies, so that the treatment energy consumption and land are greatly saved; and the treatment system is convenient to operate and stable in effect, biological nitrogen and phosphorus removal can be enhanced, and the treatment system has a very wide application prospect in a biological nitrogen and phosphorus removal technology for municipal sewage treatment.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a municipal sewage treatment system. Background technique [0002] Nitrogen and phosphorus discharge in sewage is the main cause of water eutrophication. Traditional municipal sewage plants mainly add a large amount of chemical reagents to strengthen the denitrification and phosphorus removal treatment of sewage. Although this treatment method is effective, it improves the municipal sewage treatment. The operating cost of the plant also brings secondary pollution to the environment. In order to solve this problem, the current municipal sewage mainly adopts biological denitrification and dephosphorization process to denitrify and dephosphorize sewage. [0003] The traditional biological nitrogen removal process is as follows: under aerobic conditions, ammonia nitrogen is oxidized to nitrite by ammonia oxidizing bacteria (AOB), and nitrite is oxidized to nitrate by nitrit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/28C02F3/34C02F101/10C02F101/16
CPCC02F3/30C02F3/28C02F3/34C02F2101/16C02F2101/105C02F2209/04
Inventor 黄霞刘艳臣李思岐郭瑜张轩程献伟雍晓蕾叶传刚柳文丽任驰
Owner TSINGHUA UNIV
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