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A low c/n sewage treatment process for synchronous denitrification and dephosphorization

A simultaneous denitrification and phosphorus removal and sewage treatment technology, which is applied in the fields of water/sewage multi-stage treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. Reduced carbon footprint, high processing efficiency, and reduced operating costs

Active Publication Date: 2020-07-21
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In China, the anaerobic sludge bed process is used to treat low C / N urban sewage; or the flocculation sedimentation-contact oxidation-UASB process is used to treat low C / N sewage. The process of precipitation-contact oxidation-UASB process is relatively complicated and requires the addition of chemicals
[0005] The disadvantages of the above-mentioned low C / N sewage treatment process in the prior art include: when the reaction stagnates due to insufficient carbon source, the common way is to add carbon source
However, in the reality that sewage with a low carbon-to-nitrogen mass ratio appears in large quantities, the above-mentioned low C / N sewage treatment process in the prior art cannot meet the treatment requirements. Therefore, the carbon source has always been the controlling factor of the traditional biological denitrification process.

Method used

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  • A low c/n sewage treatment process for synchronous denitrification and dephosphorization
  • A low c/n sewage treatment process for synchronous denitrification and dephosphorization

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Experimental program
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Embodiment 1

[0032] The process flow chart of a synchronous denitrification and dephosphorization treatment process method for low C / N sewage provided by the embodiment of the present invention is as follows figure 1 As shown, the specific processing process includes:

[0033] According to the water flow direction of low C / N sewage, anaerobic phosphorus release zone (1), sulfur autotrophic denitrification zone (2), integrated anammox zone (3), aerobic aeration zone (4) are set up in sequence and sludge settling area (5).

[0034] The low C / N sewage enters the anaerobic phosphorus release zone 1, and the anaerobic phosphorus release zone (1) is provided with fillers, whose main function is to release phosphorus, and at the same time use the fillers to ammoniate some organic matter in the low C / N sewage . The effluent from the anaerobic phosphorus release zone 1 is transferred to the sulfur autotrophic denitrification zone 2 .

[0035] The sulfur source used in the sulfur autotrophic deni...

Embodiment 2

[0042] figure 2 A structural diagram of a low C / N sewage treatment process device for synchronous denitrification and dephosphorization treatment provided by an embodiment of the present invention, the device includes: a reactor water inlet 6, a waste sulfur liquid tank 7 for a sulfur source , sampling port 8, mud port 9, internal return pump 10, peristaltic pump 11, return pump 12, flow meter 13, aeration head 14, sludge return pump 15, flow meter 16, aeration head 17, sludge return Pump 18, fan 19, anaerobic phosphorus release zone 20, sulfur source denitrification zone 21, integrated anammox zone 22, sedimentation zone 23, aerobic aeration zone 24, sedimentation zone 25, and water outlet 26.

[0043] Such as figure 2 As shown, the low C / N sewage enters the reactor through the water inlet 6; the effluent from the sulfur autotrophic denitrification zone 21 is returned to the anaerobic phosphorus release zone 20 through the internal return pump 10. The waste sulfur liquid ...

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Abstract

The invention provides a low C / N sewage treatment process method for synchronous denitrification and dephosphorization. The method mainly comprises the steps that an anaerobic phosphorus release region, a sulphur autotrophic denitrification region, an integral anaerobic ammonia oxidation region, an aerobic aeration region and a sludge setting region are sequentially arranged along the water flow direction of the sewage; low C / N sewage firstly enters the anaerobic phosphorus release region; outlet water of the anaerobic phosphorus release region is conveyed to the sulphur autotrophic denitrification region; mixed liquid of the sulphur autotrophic denitrification region is internally cycled to the anaerobic phosphorus release region; outlet water of the sulphur autotrophic denitrification region is conveyed to the integral anaerobic ammonia oxidation region; outlet water of the integral anaerobic ammonia oxidation region is conveyed to the aerobic aeration region; mixed liquid of the aerobic aeration region is internally cycled to the sulphur autotrophic denitrification region; outlet water of the aerobic aeration region is conveyed to the sludge setting region; the sludge of the sludge setting region flows back to the sulphur autotrophic denitrification region; the rest sludge of the sludge setting region is discharged and recovered. The low C / N sewage treatment process method has the advantages that the autotrophic denitrification and anaerobic ammonia oxidation coupling process is realized; the additional addition of carbon resources is not needed; the simultaneous denitrification and dephosphorization under the low C / N condition can be realized.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a low carbon-to-nitrogen ratio (C / N) sewage treatment process for synchronous nitrogen and phosphorus removal. Background technique [0002] It is difficult to meet the discharge standard for low C / N sewage treated by traditional denitrification process, which not only consumes high energy, wastes sewage treatment plant resources, but also requires high funds for treatment. More and more scholars at home and abroad are studying the treatment methods of low C / N urban sewage. Early scholars discussed the treatment of low C / N sewage, and proposed to change the traditional activated sludge process facilities into intermittent aeration biological denitrification process. [0003] The current research in China believes that the biological contact oxidation method is the preferred process for low C / N sewage treatment. However, the problem of easy clogging of biological filler...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/16
CPCC02F1/52C02F3/308C02F2101/105C02F2101/16C02F2203/006C02F2209/02C02F2209/06C02F2209/16C02F2209/22C02F2301/046
Inventor 姚宏阮起炀田盛
Owner BEIJING JIAOTONG UNIV