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A/A-MBR intensified combined device for denitriding and dephosphorizing and process thereof

A combined device, nitrogen and phosphorus removal technology, applied in aerobic and anaerobic process treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. The effect of mud concentration and stable denitrification effect

Active Publication Date: 2012-06-13
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

3) Improve and strengthen the existing process to enhance the effect of phosphorus and nitrogen removal, such as improved A / A / O, improved oxidation ditch, multi-stage UNTANK, improved aeration mode and dissolved oxygen distribution, etc., the improved process that has been applied There are still some indicators that are difficult to meet, and most of them are still in the stage of experimental exploration

Method used

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  • A/A-MBR intensified combined device for denitriding and dephosphorizing and process thereof
  • A/A-MBR intensified combined device for denitriding and dephosphorizing and process thereof
  • A/A-MBR intensified combined device for denitriding and dephosphorizing and process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A / A-MBR enhanced nitrogen and phosphorus removal combined device, the device includes inlet pump 1, grid 2, regulating tank 3, anoxic tank 4, anaerobic tank 5, MBR tank 6, membrane module 7, outlet pump 8, The backwash pump 9, the backwash water tank 10 and the blower 11, the water inlet pump, the grille, the adjustment tank, the anoxic tank, the anaerobic tank, the MBR tank and the outlet pump are connected sequentially by pipelines, and the pipelines connecting the adjustment tank and the anoxic tank There is a pipeline connected to the anaerobic tank, the membrane module 7 is set in the MBR tank 6, the blower is connected to the MBR tank, the MBR tank is provided with a return pipeline connected to the anoxic tank, and the backwash water tank is connected in parallel to the MBR tank through the backwash pump On the connecting pipe with the outlet pump, the membrane module is an immersed curtain membrane with a molecular weight cut-off of 150,000 Daltons. The average ...

Embodiment 2

[0015] After the sewage is lifted by the water inlet pump, it enters the regulating tank after being filtered by the grid, then enters the anoxic tank and anaerobic tank, and finally enters the MBR tank, and the water is discharged after membrane separation. The influent flow rate of the anoxic tank and anaerobic tank is designed According to the ratio of 1:1 distribution, at the same time, the mixed liquid in the MBR tank is returned to the anoxic tank according to the reflux ratio of 200%, and the sludge age is not less than 15d; Oxygen tank 1.6, MBR tank 6.0; mixed liquid suspended solids concentration (mg / L): anoxic tank 3000-4000, anaerobic tank 3000-4000, MBR tank 7000-8000; dissolved oxygen (mg / L): anoxic tank 0.5, anaerobic pool<0.2, MBR pool 2.0; pH value: anoxic pool 7.5~8.0, anaerobic pool 7.2~7.5, MBR pool 7.2~7.5.

Embodiment 3

[0017]The research experiment took the effluent of the grit chamber of a certain urban sewage treatment plant as the water inlet condition, and took the A / A-MBR process technology as the research object. By controlling different test conditions, a reasonable and effective enhanced nitrogen and phosphorus removal technology was finally found.

[0018] (1) The experiment was carried out in an urban sewage treatment plant, and the experimental design and installation of a pilot-scale device (2m 3 / h, such as figure 1 ). The influent of the device is the effluent of the cyclone grit chamber of the urban sewage treatment plant. The specific water quality indicators are shown in Table 1. Experimental process such as figure 1 , the operation of the A / A-MBR combined process is: after the raw water is lifted by the submersible sewage pump, it enters the regulating tank after passing through the fine grid and disc filter, then enters the anoxic zone, the anaerobic zone, and finally en...

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Abstract

The invention provides an intensified device for denitriding and dephosphorizing, which aims at tower sewage characteristics and can realize the target of standardization and reconstruction. The A / A-MBR intensified combined device for denitriding and dephosphorizing comprises a water inlet pump, a grille, a regulating pond, an anoxia pond, an anaerobic pond, an MBR pond, a film assembly, a water outlet pump, a back wash pump, a back wash water tank and a blower. By utilizing the process of treating the town sewage by the A / A-MBR intensified combined device for denitriding and dephosphorizing,the sewage is hoisted by the water inlet pump and filtered by the grille to enter the regulating pond, then enter the anoxia pond and anaerobic pond, and finally enter the MBR pond, and flow out after being subjected to the membrane separation.

Description

1. Technical field [0001] The invention relates to the field of sewage treatment, in particular to a device for strengthening denitrification and dephosphorization in sewage treatment and a process thereof. 2. Background technology [0002] In order to realize the sustainable development of the water environment in various river basins and focus on the treatment of eutrophication in water bodies, governments at all levels have intensified the management of water environment quality in various regions. For example, Jiangsu Province promulgated the "Main Water Pollutant Discharge Limits (DB32 1072-2007), requires that the sewage treatment plants in the river basin must meet the first-level A standard of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002). It is an urgent task to upgrade and transform urban sewage treatment plants in key river basins. There are many process forms for nitrogen and phosphorus removal of sewage at home and abroad,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/30
Inventor 郑晓英陈卫朱宁伟武迪王永才何玉洁许旻
Owner HOHAI UNIV
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