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Inverted A2/O+ composite MBR sewage treatment device and treatment method thereof

A sewage treatment device and composite technology, applied in water/sludge/sewage treatment, biological water/sewage treatment, chemical instruments and methods, etc., can solve the problem of low denitrification efficiency, achieve large contact area and easy installation The effect of simple disassembly and structure

Inactive Publication Date: 2020-02-14
JIANGSU LONG LEAPING ENG DESIGN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an inverted A 2 / O+compound MBR sewage treatment device, effectively solve the inversion A 2 / O denitrification efficiency is low, while reducing energy consumption and operating costs in the MBR process

Method used

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  • Inverted A2/O+ composite MBR sewage treatment device and treatment method thereof
  • Inverted A2/O+ composite MBR sewage treatment device and treatment method thereof
  • Inverted A2/O+ composite MBR sewage treatment device and treatment method thereof

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Experimental program
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Effect test

Embodiment 1

[0039] Such as figure 1 As shown, an inverted A 2 / O+ compound MBR device, including superfine grid 1, anoxic pool 2, anaerobic pool 3, aerobic pool 4 and compound MBR pool 5 arranged in sequence according to the water flow direction.

[0040] Such as figure 2 As shown, the ultra-fine grids 1 are arranged in parallel, and the distance between the two grids is 0.1 mm. The ultra-fine grids 1 are composed of grid bars, and the distance between the grid bars is 0.2-2 mm, and are used to filter finer particles in the pretreatment water.

[0041] The ultra-fine grid 1 is connected to the anoxic pool 2 and the anaerobic pool 3 through the water inlet pipe 11. The water inlet pipe 11 is provided with a multi-point water inlet pipe 13, and the sewage is respectively connected to the anoxic pool 2 and the anaerobic pool through the multi-point water inlet pipe 13. Pond 3; Multi-point water inlet pipe 13 is connected to the pipeline of anoxic pool 2 and is provided with anoxic pool wa...

Embodiment 2

[0061] Utilize the device and method of embodiment 1 to process the domestic sewage after pretreatment, specific process conditions: hydraulic retention time 7.5h, MBR tank hydraulic retention time 1.5h, nitrifying liquid reflux ratio is 120%; The reflux of activated sludge The ratio is 180%; the diameter of the three-dimensional elastic filler unit of the composite MBR pool is 200mm, and the filler spacing is 80mm; the flat membrane is selected, and the design margin of the membrane flux is increased by 30%; Component processing volume is less than 1.2m 3 / hr; Choose a perforated aeration tube with a diameter of 20mm, with a hole of 2mm, a hole spacing of 100mm, a steam-water ratio of 24:1, and control of dissolved oxygen at 3-5mg / L.

[0062] The scale of the sewage plant is 20,000 tons / day, and the average influent COD is 352.5mg / L, BOD 5 124.7mg / L, ammonia nitrogen 25.6mg / L, total nitrogen 32.2mg / L, total phosphorus 4.1mg / L.

[0063] The effluent water quality is COD 20....

Embodiment 3

[0065] The influent water quality of a sewage plant is: average COD 422.4mg / L, BOD 5 141.9mg / L, ammonia nitrogen 28.3mg / L, total nitrogen 36.2mg / L, total phosphorus 5.6mg / L.

[0066] The original sewage treatment process of the sewage plant is A 2 / O+MBR process, the treatment scale is 10,000 tons / day, the hydraulic retention time is 9h, the hydraulic retention time of the MBR tank is 2h, the reflux ratio of nitrification liquid is 200%, the activated sludge reflux ratio is 200%, the hollow fiber membrane is selected, and a single membrane module is used for treatment Volume below 1.0m 3 / hr, 18mm diameter aeration perforated tube, 1.8mm perforation, 150mm perforation spacing, 24:1 soda water ratio. After being treated by the original sewage treatment process of the sewage plant, the effluent quality is COD 50.5mg / L, BOD 5 10.4mg / L, ammonia nitrogen 4.8mg / L, total nitrogen 13.5mg / L, total phosphorus 0.48mg / L, meeting the first-class a emission standard.

[0067] Accordin...

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Abstract

The invention discloses an inverted A2 / O+ composite MBR sewage treatment device and a treatment method thereof. The device comprises an ultrafine grid, an anoxic tank, an anaerobic tank, an aerobic tank and a composite MBR reactor which are sequentially arranged in the water flow direction. Pretreated sewage passing through the superfine grid is pumped into the anoxic tank by a pump; one end of the anoxic tank is connected with sludge return and nitrification liquid return pipelines for subsequent treatment; effluent of the anoxic tank directly enters the anaerobic tank and the aerobic tank; the nitrification liquid return pipeline is arranged at one end of the aerobic tank and returns to the anoxic tank, and effluent of the aerobic tank enters the composite MBR reactor. Sewage treated bya three-dimensional elastic filler and a membrane component in the MBR tank can be discharged, the sludge return pipeline is arranged at one end of the MBR tank and returns sludge to the anoxic tank,and meanwhile, a sludge discharge pipeline is arranged to discharge residual sludge. The device and the method can enhance the nitrogen and phosphorus removal effect, lower the process energy consumption and obviously enhance the effluent quality standard.

Description

technical field [0001] The invention relates to the technical field of urban sewage treatment, in particular to an inverted A 2 / O+ composite MBR sewage treatment device and its treatment method. Background technique [0002] With the improvement of the discharge standards of urban sewage plants, the traditional sewage treatment process can no longer meet the discharge requirements, and it is urgent to upgrade the traditional sewage treatment process. [0003] Traditional A 2 The / O process has three obvious disadvantages: 1) the anaerobic zone is in the front, and the nitrate in the return sludge has an adverse effect on the anaerobic zone; 2) the anoxic zone is located in the middle of the system, and denitrification is unfavorable in the distribution of carbon sources 3) There is an internal circulation, and only a small part of the excess sludge discharged from the system has actually gone through the complete phosphorus release and phosphorus absorption process. Henc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/16
CPCC02F3/302C02F2101/16
Inventor 潘龙张瑞斌奚道国潘卓兮周乃王乐阳祖白玉陈凡
Owner JIANGSU LONG LEAPING ENG DESIGN
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