Membrane bioreactor capable of realizing synchronous nitration denitrification denitrogenation function

A membrane bioreactor, synchronous nitrification technology, applied in sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc. High volume, small footprint, and the effect of reducing membrane fouling

Inactive Publication Date: 2008-08-06
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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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 two independent or separated reactors with different dissolved oxygen (D0) concentrations, or in time or It is carried out in the same reactor with alternate anoxic and aerobic environments in space. 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 denitrification effect is poor, the equipment is huge, and the investment is high.

Method used

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  • Membrane bioreactor capable of realizing synchronous nitration denitrification denitrogenation function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Including reactor system, membrane module, dissolved oxygen electrode, pH electrode and other on-line monitoring components. The reactor is equipped with a membrane module, which is connected with a water pressure gauge and a vacuum pump in sequence. The reactor is equipped with a water inlet pipe and a dissolved oxygen electrode. , a thermometer and a pH electrode, spherical elastic fillers 8 are evenly arranged around the membrane module 7 in the reactor column 11, and a microporous aerator 9 is arranged at the bottom of the reactor column 11, and the microporous aerator 9 is connected with the air The pumps 10 are connected to ensure uniform aeration of the reactor column 11 and provide the required concentration of dissolved oxygen. The spherical elastic filler 8 has a specific surface area of ​​5m 2 / g, the pore size is 100μm, the porosity is 50%, the membrane in the membrane module is a hollow fiber ultrafiltration membrane, the nominal pore size of the ultrafiltr...

Embodiment 2

[0027] The difference from the example is that:

[0028] According to Figure 1, it is processed into an effective volume of 0.5m 3 The column body 11 of the MBR reactor and a set of membrane modules are configured, and the spherical elastic packing 8 is evenly arranged with other spaces in the MBR. The spherical elastic packing (8) is connected in series from top to bottom to form a whole, and is fixed in the reactor cylinder 11. In addition, the MBR system is still equipped with dissolved oxygen, pH, temperature online monitoring control elements. Other equipment such as vacuum pumps, air pumps, aerators, etc. are selected according to the corresponding models.

[0029]The influent of the MBR is the effluent of the bioactive filter of the coking plant, and the inoculation sludge in the MBR is taken from the sludge in the biological treatment system of the coking wastewater on an engineering scale. Other reactor operating parameters are: the sludge residence time in the MBR...

Embodiment 3

[0033] The difference from the examples is that the spherical elastic filler 8 has a specific surface area of ​​20m 2 / g, the porosity is between 70%, and the carrier pore diameter is 1000 μm. The operating parameters of the membrane bioreactor are: sludge residence time in the reactor: 5-10d, operating temperature: 10-30°C; pH in the reactor: 6.5-8.5; dissolved oxygen concentration: 0.2-3.0mg / L. The membrane in the membrane module is a hollow fiber ultrafiltration membrane, the nominal pore size of the ultrafiltration membrane is 0.05μm, and the membrane area is 25m 2 , the flux is 301 / m 2 .h.

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Abstract

The invention relates to the treatment of industrial wastewater and domestic sewage containing nitrogen, in particular a membrane bioreactor (MBR) which can realize the function of synchronous nitrogen removal of nitrification and denitrification. The reactor comprises a reactor cylinder, a membrane component, spherical elastic filler, dissolved oxygen (DO) electrode, a pH electrode, a thermometer and other on-line monitoring and controlling components. A water production end on an internal membrane component of the MBR is connected with a water production pressure gauge and a vacuum pump. Except the membrane component, the inside of the MBR is also evenly provided with the spherical elastic filler which forms an integer by connecting in series from top to bottom and is fixed on the top and bottom of the reactor. The bottom of the MBR has a micropore aerator connected with an air pump for the aeration utilization of the MBR. The membrane bioreactor introduces the porous spherical elastic filler into the MBR and regulates the micro-environment inside the MBR, so as to realize the function of synchronous nitrogen removal of nitrification and denitrification. The membrane bioreactor has small land occupancy and simple operation, saves energy consumption, can remove a plurality of pollutants of organic matters, ammonia nitrogen, etc., and is applicable to the treatment of industrial organic wastewater, domestic sewage, etc.

Description

technical field [0001] The invention relates to the treatment of nitrogen-containing industrial wastewater and domestic sewage, in particular to a membrane bioreactor capable of synchronous nitrification and denitrification denitrification. Background technique [0002] With the continuous development of petrochemical, coking, food and pharmaceutical industries, a large amount of nitrogen-containing wastewater has caused serious environmental pollution and water eutrophication. Therefore, it is of great social and economic significance to effectively and economically remove nitrogen from wastewater or control the nitrogen content in water. There are mainly physical and chemical methods and biochemical methods for treating ammonia nitrogen-containing wastewater. Compared with physical and chemical methods, biological denitrification technology has the characteristics of low investment, small footprint, and no secondary pollution. It is recognized as one of the most promising...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F1/44
CPCY02W10/10
Inventor 史荣久徐慧张颖杨伟超李慧
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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