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Membrane bioreactor for denitrification and waste water denitrification method

A membrane bioreactor, denitrification technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. The problems of high consumption and many return pipelines can reduce membrane pollution, overcome large energy consumption and small footprint.

Inactive Publication Date: 2012-09-26
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the operating energy consumption may be high, the flow state of the sludge mixture in the reactor is not very good, and the return pipeline is many and complicated, which is not easy to operate

Method used

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  • Membrane bioreactor for denitrification and waste water denitrification method
  • Membrane bioreactor for denitrification and waste water denitrification method
  • Membrane bioreactor for denitrification and waste water denitrification method

Examples

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Effect test

Embodiment 1

[0032] Reactor build:

[0033] In a reactor 24 with a total volume of 50L, the reactor is divided into five small tanks connected in series with four vertical guide baffles 15, which are respectively the first anoxic tank 8 with a volume of 8.69L, and the first anoxic tank 8 with a volume of 8.69L. The aerobic pool 9 with a volume, the second anoxic pool 1 with a volume of 8.69L, the anaerobic pool 11 with a volume of 8.69L and the membrane pool 12 with a volume of 14L, the ratios of the height and diameter of the five reaction pools are 13, 13, 13, 13 and 8.33; the membrane module 6 is vertically placed in the membrane pool 12, which is a PVDF flat microfiltration membrane with a membrane pore size of 0.1 μm and a membrane area of ​​0.23m 2 .

[0034]The bottom of the first anoxic pool 8 is connected with a water inlet 20, and the water inlet 20 is connected with a water inlet pump 1; the membrane module 6 is connected with a water outlet 21, and the water outlet 21 is conne...

Embodiment 2

[0038] Nitrogen removal treatment of sewage:

[0039] The equipment constructed in Example 1 is used for sewage treatment. The sewage enters from the water inlet and passes through the reaction tanks at all levels. 200%; membrane water output 16.2L h -1 m - The sludge concentration in the reactor is 6000-7000mg / L, the temperature is about 20°C, the dissolved oxygen concentration in the aerobic pool 9 is about 1mg / L, and the dissolved oxygen concentration in the membrane pool 12 is about 3mg / L; the first anoxic pool 8 , The dissolved oxygen in the second anoxic tank 10 and the anaerobic tank 11 is 0.11mg / , 0.12mg / , almost zero. The present invention sets different reaction pH conditions, between 6.5-8.5, the changes of pH and dissolved oxygen are shown in Table 1.

[0040] Influent water is simulated domestic wastewater, COD content 300-500mg / L, NH 4 -N content 30-50mg / L, TN content 60-100mg / L, COD / TN about 5; effluent COD 30-60mg / L, average removal rate about 90%, NH 4 -N...

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Abstract

The invention belongs to the field of environment protection and discloses a membrane bioreactor for denitrification and waste water denitrification method thereof. The membrane bioreactor is divided into a first anoxic pond, an aerobic pound, a second anoxic pound, an anaerobic pond and a membrane pound by a vertical deflecting baffle plate and an aeration device, wherein the ponds are five independent and communicated reactor chambers; after waste water enters the process, the biochemical treatment processes such as the degradation, nitrification and denitrification of organic matters are completed under the action of microorganisms; and effluent is obtained by membrane filtration and pumping. The bioreactor and the method have the advantages that: sludge mixed liquid flows in a piston flow mode in the whole system, but is in a fully mixed state in a single cell and a refluxing device is used, so the degree of mixing in the entire reactor is high and the mass transfer effect is good; under a condition of not adding extra carbon source, the process strengthens the denitrification by using high sludge concentration, so deep denitrification treatment is realized and the pollution to the membrane is relieved; and at the same time, due to the high efficiency trapping and separation characteristic of the membrane, the quality of effluent of filtration is high.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a membrane bioreactor for denitrification and a sewage denitrification method thereof. Background technique [0002] With the intensification of human production and living activities, a large amount of nitrogen-containing wastewater is discharged into water bodies, causing serious environmental pollution. Eutrophication occurs in most surface water bodies in my country, and nitrogen and phosphorus pollution is becoming more and more serious. In-depth and systematic research on the theory and technology of nitrification and denitrification, and its promotion to practical engineering applications, will help reduce the content of nutrient elements in water and improve The current situation of environmental pollution and water shortage in our country has important practical significance. [0003] Membrane bioreactor (MBR) is a new sewage treatment process formed by organically ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 孟凡刚周忠波李适宇陈尊裕
Owner SUN YAT SEN UNIV
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