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Biochemical combined treatment method for municipal sewage

An urban sewage and biochemical technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of high operating cost, complicated operation, and inability to effectively remove organic matter from urban sewage at the same time. Sludge resource utilization and other issues to achieve the effect of reducing pollution risks

Pending Publication Date: 2022-07-29
STATE GRID HEBEI ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The existing sewage treatment system still has the problems of complicated operation, high operating cost, and poor treatment effect, and the equipment process is complicated, and the removal effect of COD, BOD, SS and other indicators in the water is not ideal. The above-mentioned disclosed patents are still not effective at the same time. Removal of organic matter in urban sewage and the utilization of sludge resources in the process of sewage treatment, so it is necessary to provide an urban sewage treatment method for the combined biochemical treatment method of urban sewage

Method used

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  • Biochemical combined treatment method for municipal sewage
  • Biochemical combined treatment method for municipal sewage
  • Biochemical combined treatment method for municipal sewage

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Embodiment 1

[0034] see Figure 1-4 , an embodiment provided by the present invention: a combined biochemical treatment method of urban sewage, comprising the following steps:

[0035] S1, the urban sewage is introduced into the grid-type treatment tank, and the internal treatment grid is used to remove large debris;

[0036] S2, the sewage after removal of impurities is lifted by the influent pump station and then enters the aeration tank for aeration treatment to remove sand and oil slicks in the sewage;

[0037] S3, the aerated sewage is introduced into the submerged ultrafiltration separation membrane device to filter colloids and particulates in the sewage;

[0038] S4, the aerated sewage is introduced into the biological contact oxidation system to desalinate the sewage and remove the COD in the sewage;

[0039] S5, the desalinated sewage is introduced into the first-level sedimentation tank for precipitation;

[0040] S6, adding a phosphorus removal agent to the first-level sedim...

Embodiment 2

[0046] see Figure 4 , is another preferred embodiment of the present invention, which has the implementation contents of the above-mentioned embodiments, wherein, for the specific implementation of the above-mentioned embodiments, please refer to the above-mentioned descriptions, and the embodiments here will not be repeated in detail; In the example, the difference between it and the above-mentioned embodiment is:

[0047] In this embodiment, both ends of the filter screen 3 are fixedly connected with clamping blocks 17 , the bottom plate 2 is provided with clamping slots corresponding to the clamping blocks 17 , a hollow sleeve 18 is arranged between the two clamping blocks 17 , and the hollow sleeve 18 is inside Two sliding blocks 19 are slidably connected, a spring 20 is fixedly connected between the two sliding blocks 19, one end of the spring 20 is fixedly connected with a positioning rod 21, one end of the positioning rod 21 penetrates the hollow sleeve 18 and extends ...

Embodiment 3

[0049] see figure 1 , is another preferred embodiment of the present invention, which has the implementation contents of the above-mentioned embodiments, wherein, for the specific implementation of the above-mentioned embodiments, please refer to the above-mentioned descriptions, and the embodiments here will not be repeated in detail; In the example, the difference between it and the above-mentioned embodiment is:

[0050] In this embodiment, in step S4, the pH of the desalinated fresh water is adjusted to 6.2-6.5, and then introduced into a reverse osmosis system for secondary desalination.

[0051] The urban sewage biochemical joint treatment method combines physical and biochemical methods to treat urban sewage. After desalination treatment, the salt in the sewage is effectively removed, the colloid and particulate matter in the wastewater are effectively removed, and the pollution of the subsequent treatment is reduced. risk.

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Abstract

The invention discloses an urban sewage biochemical combined treatment method which comprises the following steps: S1, introducing urban sewage into a grid type treatment tank, and removing large impurities by utilizing an internal treatment grid; s2, lifting the sewage subjected to impurity removal through a water inlet pump station, and introducing the sewage into an aeration tank for aeration treatment to remove sand and floating oil in the sewage; s3, introducing the aerated sewage into an immersed ultrafiltration separation membrane device to filter colloids and particulate matters in the sewage; s4, introducing the aerated sewage into a biological contact oxidation system, desalting the sewage, and removing COD (Chemical Oxygen Demand) in the sewage; and S5, introducing the desalted sewage into a primary sedimentation tank for sedimentation. According to the biochemical combined treatment method for the municipal sewage, a physical-chemical method and a biochemical method are combined to treat the municipal sewage, salt in the sewage is effectively removed through desalination treatment, colloids and particulate matters in the wastewater are effectively removed, and the pollution risk of subsequent treatment is reduced.

Description

technical field [0001] The invention relates to the field of sewage treatment related products, in particular to a biochemical combined treatment method of urban sewage. Background technique [0002] With the increasingly serious environmental pollution, the requirements for the quality of sewage discharge are more stringent. At present, the treatment of urban sewage is mainly based on biological treatment. Due to the lack of water resources, the reuse of urban sewage has far-reaching significance for the development of the city. [0003] At present, the commonly used sewage treatment processes at home and abroad include A2 / O, oxidation ditch method, SBR method and WWRR method. A2 / O (anaerobic-anaerobic-aerobic) utilizes the biological proliferation activities of activated sludge in the process of anaerobic, anoxic and aerobic processes, and achieves denitrification and phosphorus removal while degrading organic matter in sewage. It has become an important measure for sewa...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/10
CPCC02F9/00C02F1/001C02F2001/007C02F1/40C02F1/444C02F1/52C02F3/02C02F7/00C02F2101/105
Inventor 刘克成夏彦卫张立军牛向楠王颖楠侯海萍
Owner STATE GRID HEBEI ELECTRIC POWER RES INST
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