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An energy-saving inverted aao-mbr sewage treatment method

A sewage treatment method and energy-saving technology, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. , waste blast aeration energy consumption and other issues, to achieve the effect of saving aerobic aeration, improving effective utilization, and avoiding ineffective consumption

Active Publication Date: 2016-03-30
GUANGZHOU MUNICIPAL ENG DESIGN & RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high gas-water ratio of the MBR membrane tank, the dissolved oxygen concentration of the mixed liquid is as high as 5.0mg / L~10.0mg / L. If it is not used scientifically, it will not only waste the energy consumption of blast aeration and increase the cost of sewage treatment , and will consume a large amount of high-quality carbon sources available in sewage, which is not conducive to improving the water output effect of the entire sewage treatment system

Method used

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  • An energy-saving inverted aao-mbr sewage treatment method
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specific Embodiment approach 1

[0027] Combine figure 1 with figure 2 To illustrate, the energy-saving inverted AAO-MBR sewage treatment method provided by the present invention uses a device including an anoxic tank 1, an anaerobic tank 2, an aerobic tank 3, and a membrane tank 4 that are connected to each other.

[0028] The anoxic tank 1 is provided with a first water inlet 11, a first water outlet 12, and a flow thruster 1a. The first water outlet 13 connects the anoxic tank 1 and the anaerobic tank 2;

[0029] The anaerobic tank 2 is provided with a second water inlet 21, a second water outlet 22, a third water outlet 23, a stirrer 2a, and a mixed liquid outlet pipe 2b. The second water outlet 22 connects the anaerobic tank 2 and the aerobic tank 3 The second outlet hole 22 is provided with a first regulating valve 3b; the mixed liquid outlet pipe 2b connects the anaerobic tank 2 and the membrane tank 4 through the third outlet hole 23, and the mixed liquid outlet pipe 2b is provided with a second regulator ...

specific Embodiment approach 2

[0037] The difference between this embodiment and the first embodiment is that the first regulating valve 3b and the third regulating valve 4c in the aerobic tank 3 are closed, the aeration device 3a in the aerobic tank 3 is in a stopped state, and the aerobic tank 2 is All the mixed liquid flows into the membrane tank 4 through the third outlet hole 23 and the mixed liquid outlet pipe 2b (ie R2=100%); after pretreatment, the sewage enters the anoxic tank 1 and anaerobic tank 2 (according to the sewage treatment The total amount Q) are respectively q1=0.55Q, q2=0.45Q; the return flow rate of the membrane pool 4 to the anoxic pool 1 is r=7Q. The schematic diagram of the process flow of the second embodiment is shown in image 3 Shown.

[0038] The hydraulic retention time of anoxic tank 1 is 4.0h, the hydraulic retention time of anaerobic tank 2 is 2.0h, the hydraulic retention time of membrane tank 4 is 2.0h, the mixed liquid sludge in anoxic tank 1, anaerobic tank 2 Concentrati...

specific Embodiment approach 3

[0041] The difference between this embodiment and the first embodiment is that the second regulating valve 2c in the anaerobic tank 2 is closed, and the amount of sewage entering the anoxic tank 1 and the anaerobic tank 2 after pretreatment (calculated according to the total amount of sewage treatment Q ) Respectively q1=0.6Q, q2=0.4Q; all the mixed liquid in the anaerobic tank 2 flows into the aerobic tank 3 through the second outlet hole 22 and the first regulating valve 3b (ie R1=100%); The sewage treated by the oxygen tank 3 enters the membrane tank 4 from the fourth water outlet 31 and the third regulating valve 4c, and the return flow rate of the membrane tank 4 back to the anoxic tank 1 is r=3Q. The schematic diagram of the process flow of the third embodiment is shown in Figure 4 Shown.

[0042] The hydraulic retention time of anoxic tank 1 is 4.0h, the hydraulic retention time of anaerobic tank 2 is 2.0h, the hydraulic retention time of aerobic tank 3 is 2.5h, and the h...

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Abstract

The invention belongs to the technical field of sewage treatment and provides an energy-saving inverted AAO-MBR anaerobic / anoxic / oxic-membrane bioreactor) sewage treatment method. The adopted device comprises an anaerobic tank, an anoxic tank, an oxic tank and a membrane tank which are sequentially communicated, wherein the membrane tank is also respectively communicated with the anaerobic tank and the anoxic tank, pretreated sewage respectively and continuously flows into the anoxic tank and the anaerobic tank in proportion, and mixed liquid flowing out of the anoxic tank flows into the anaerobic tank; the mixed liquid treated by the anaerobic tank respectively and continuously flows into the oxic tank and the membrane tank in proportion; the mixed liquid flowing out of the oxic tank flows into the membrane tank; and the mixed liquid of the membrane tank flows back into the anoxic tank. The energy-saving inverted AAO-MBR sewage treatment method can operate in multiple modes such as singlepoint or multipoint inflowing inverted AAO-MBR and AA-MBR (anaerobic / anoxic-membrane bioreactor) according to variations of water quality, water yield and environmental conditions. The oxic tank is flexibly arranged, so that utilization rate of dissolved oxygen produced by excessive aeration in the membrane tank is increased to the utmost extent, the blast aeration rate of the oxic tank is reduced, and the whole operation energy consumption of an MBR process is correspondingly reduced; a sewage biochemical treatment technology is combined with a membrane separation technology, so that construction of a secondary sedimentation tank is avoided, and the area occupied by a sewage treatment plant is reduced.

Description

Technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an activated sludge method sewage biological treatment process. Background technique [0002] The shortage of water resources and energy and the deterioration of water environment quality have increasingly become the bottleneck of social and economic development. Improving sewage treatment rate and treatment level, strengthening the efficiency of nitrogen and phosphorus removal of sewage treatment plants, and reducing sewage treatment energy consumption and costs have become urgent tasks. With the improvement of the effluent quality of sewage treatment plants, the existing sewage treatment plants generally suffer from insufficient carbon sources. How to improve the efficient utilization of the inherent carbon source in the sewage by the existing sewage treatment process and reduce the concentration of pollutants in the effluent is a problem that needs to be solved urgently. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 李捷隋军
Owner GUANGZHOU MUNICIPAL ENG DESIGN & RES INST CO LTD
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