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Fluidized bed film bioreactor for sewage treatment

A technology of membrane bioreactor and fluidized bed, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve complex condition control, poor denitrification effect, and huge equipment and other problems, to achieve the effect of improving processing capacity, saving energy consumption, and high volume load

Inactive Publication Date: 2011-08-31
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent decades, despite the great development of biological denitrification technology, nitrification and denitrification are still carried out in independent or separated reactors with different dissolved oxygen (DO) concentrations, or in time or space On the other hand, alternate anoxic and aerobic environments are carried out in one reactor at the same time. One process is divided into two systems, and the condition control is complicated. It is difficult to unify the two in time and space. The nitrogen removal effect is poor, the equipment is huge, and the investment is high

Method used

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  • Fluidized bed film bioreactor for sewage treatment
  • Fluidized bed film bioreactor for sewage treatment
  • Fluidized bed film bioreactor for sewage treatment

Examples

Experimental program
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Embodiment 1

[0025] figure 1 It is a diagram of a fluidized bed membrane bioreactor device, including a reactor system (4), a membrane module (5), a peristaltic pump (2) and (10) to control the influent flow and the effluent flow to adjust the hydraulic retention time (HRT). The reactor is filled with carrier particles with a diameter of about 5mm made by waste rubber powder, activated carbon and binder. The air enters the reactor from the air pump (8) through the flow meter (7) and then through the perforated aeration pipe (6). The air volume is controlled by the flow meter, which can wash the surface of the membrane filament to reduce pollution, and can also provide the activated sludge microorganisms. oxygen. The liquid level in the reactor is controlled by a liquid level controller (3). The test inlet water is sent into the bioreactor by the inlet pump (2), and then the organic matter is removed through the catabolism of the microorganisms in the bioreactor, and finally the negative ...

Embodiment 2

[0030] The difference from Example 1 is that the carrier particles are ellipsoidal elastic fillers with multiple pairs of holes, and the filling ratio is 20% of the effective volume of the reactor. The parameters of the fluidized bed membrane bioreactor are: hydraulic retention time 13h; operating temperature: 10-30°C; PH: 6-8; gas volume: 0.3m3 / h, dissolved oxygen concentration: 0.2-2mg / L. The system uses intermittent suction to discharge water, pumping for 12 minutes, and stopping for 3 minutes. The membrane pore diameter is 0.2um, the surface area of ​​the membrane is 0.2m2, and the membrane flux is 7.5L / (m2·h).

Embodiment 3

[0032]The difference from Examples 1 and 2 is that the carrier particles are ellipsoidal elastic fillers with multiple pairs of holes, and the filling ratio is 30% of the effective volume of the reactor. The parameters of the fluidized bed membrane bioreactor are: hydraulic Residence time 10h; operating temperature: 10-30°C; PH: 6-8; gas volume: 0.5m3 / h, dissolved oxygen concentration: 0.5-2.5mg / L. The system uses intermittent suction to discharge water, pumping for 12 minutes, and stopping for 3 minutes. The membrane pore diameter is 0.5um, the surface area of ​​the membrane is 0.5m2, and the membrane flux is 10L / (m2·h).

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Abstract

The invention discloses a fluidized bed film bioreactor for sewage treatment, which belongs to the technical field of water and waste water treatment. The invention utilizes a process combining a biological fluidized bed with a film bioreactor, i.e. the reactor is filled with self-produced carrier granules with a diameter of about 5mm, wherein the carrier granules are made of waste rubber powder, activate carbon and adhesive, and the filling ratio is 10-30% of the effective volume of the reactor. By means of the synergistic effect of the carriers and sludge to finish the film forming process, microorganism is grown on the filler to reduce the concentration of the sludge in the reactor, change the environment running condition of the reactor and slow down the film pollution, thus further prolonging the service life of the film and improving the treatment capacity of the film. By filling the self-produced carrier granules in the film bioreactor and using the filler to change and regulate the interior microenvironment of the fluidized bed film bioreactor, such as dissolved oxygen (DO), the quantity of the filler and the water retention time, a local anoxic zone is formed, thus further realizing the synchronous nitration and denitrification function and improving the removal efficiency of total nitrogen as well as the denitrification efficiency. The fluidized bed film bioreactor for sewage treatment has a simple structure, does not feed the addition of chemical agent, is convenient and efficient to run and operate, can obtain high-quality outlet water, saves energy, can remove various pollutants such as organic matters, total nitrogen and the like, is suitable for treatment of organic waste water such as industrial and domestic waste water and the like, and can be hopefully applied in engineering practice.

Description

technical field [0001] The invention belongs to the technical field of membrane bioreactor and water treatment, and in particular relates to a water treatment process and equipment for removing organic matter and total nitrogen in sewage by using a fluidized bed membrane bioreactor. Background technique [0002] Membrane bioreactor is a sewage treatment system and recycling process that combines high-efficiency membrane separation technology and biodegradation of activated sludge. The membrane module replaces the secondary sedimentation tank in traditional biological treatment technology. Membrane bioreactor has the advantages of good solid-liquid separation effect, good effluent quality, small amount of sludge production, small footprint, and simple operation and management. Membrane bioreactor has become a hot spot in the field of water treatment at home and abroad because of its outstanding advantages that cannot be compared with the traditional activated sludge method. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 李敏郝敏汪媛宫存鹏刘双
Owner BEIJING FORESTRY UNIVERSITY
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