Efficient denitrification method and novel membrane aeration MBR (membrane bioreactor) for realizing method

A technology of membrane bioreactor and membrane aeration, applied in chemical instruments and methods, biological water/sewage treatment, water pollutants, etc., can solve the problems of DAMO functional microorganism loss, low methane solubility, small mass transfer coefficient, etc. Achieve the effects of reducing the loss of DAMO functional microorganisms, improving mass transfer efficiency, and increasing content

Inactive Publication Date: 2018-05-08
HARBIN INST OF TECH
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Problems solved by technology

[0004] In order to solve the low solubility of methane in the water phase and the small mass transfer coefficient in the existing denitrification anaerobic methane oxidation technology, the mass transfer process of methane from the gas phase to the water phase and then used by microorganisms is greatly restricted, and the denitrification efficiency is low. As well as the serious problem of the loss of DAMO functional microorganisms, the present invention provides a novel high-efficiency denitrification reaction device and method thereof, and particularly relates to an efficient denitrification anaerobic methane oxidation carbon emission reduction coupling high-efficiency denitrification system, using The technical scheme is as follows:

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  • Efficient denitrification method and novel membrane aeration MBR (membrane bioreactor) for realizing method
  • Efficient denitrification method and novel membrane aeration MBR (membrane bioreactor) for realizing method

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Embodiment approach 1

[0032] combine figure 1 Description of this embodiment, this embodiment provides a novel membrane aerated membrane bioreactor for realizing the above method, the novel membrane aerated membrane bioreactor comprises a reactor main body 1, a temperature control device 2, a magnetic stirring device 3. Solid-liquid separation membrane 4, aeration membrane 5, pH electrode 22, high-pressure methane gas storage tank 13, water inlet device 15, water outlet device 26, gas outlet pipeline 23, gas outlet liquid sealing device 25, water inlet pump 11 and water outlet pump 17; wherein: the outside of the wall of the reactor body 1 is provided with a temperature control device 2; the bottom of the reactor body 1 is provided with a magnetic stirring device 3; the inner wall of the reactor body 1 is also provided with a pH electrode 22; the inside of the reactor main body 1 is also fixed with a solid-liquid separation membrane 4 and an aeration membrane 5; the solid-liquid separation membrane...

Embodiment approach 2

[0046] This embodiment adds a technical feature liquid level sensor 21 on the basis of Embodiment 1. The liquid level sensor 21 in this embodiment includes a high liquid level sensor probe 6, a low liquid level sensor probe 7, and the first liquid level sensor signal output Line 18, the second liquid level sensor signal output line 19 and the third liquid level sensor signal output line 20; wherein: the liquid level sensor 21 communicates with the high liquid level sensor probe 6 and the low level sensor through the first liquid level sensor signal output line 18 The liquid level sensor probe 7 is connected, the liquid level sensor 21 is connected with the water inlet pump 11 through the second liquid level sensor signal output line 19, and the liquid level sensor 21 is connected with the water outlet pump 17 through the third liquid level sensor signal output line 20; The liquid level sensor probe 6 and the low liquid level sensor probe 7 are fixed inside the reactor main body...

Embodiment approach 3

[0052] This embodiment provides a novel membrane aerated membrane bioreactor efficient denitrification method, the specific method is as follows:

[0053] 1. In this embodiment, NH is added to water 4 + -N, NO 3 - -N and KH 2 PO 4 , CaCl 2 2H 2 O, MgSO 4 ·7H 2 O and trace elements to simulate the actual wastewater, so that the content of the above components in the wastewater is as follows: KH 2 PO 4 0.075g / L, CaCl 2H 2 O0.3g / L, MgSO 4 ·7H 2 O 0.2g / L, basic trace elements 0.2mL / L, acid trace elements 0.5mL / L, NH 4 + -N 200mg / L, NO 3 - -N 200mg / L.

[0054] 2. In this embodiment, the mixed flora is: a mixed flora composed of DAMO bacteria Candidatus Methylomirabilis oxyfera, DAMO archaea Methanoperedens nitroreducens and Anammox bacteria through 315 days of enrichment culture

[0055] The artificial sewage configured according to the above method is used as the experimental object, and the novel membrane aerated membrane bioreactor of the second embodiment and ...

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Abstract

The invention discloses an efficient denitrification method and a novel membrane aeration MBR (membrane bioreactor) for realizing the method, and belongs to the technical field of sewage biological denitrification. The method is characterized in that a mixed microbial flora subjected to enrichment culture is put inside a reactor main body; sewage to be treated is conveyed inside the reactor main body through a water inlet pump; meanwhile, methane gas is continuously conveyed into a mud water mixture; bubbleless aeration is performed through an aeration membrane; a stirring device stops after the hydraulic retention time is reached; the mud water mixture is subjected to static sedimentation; after the static sedimentation, solid-liquid separation and membrane discharging-out are performed.The invention also provides the novel membrane aeration MBR for realizing the method. The method has the advantages that an MBR system and membrane aeration are coupled; the biomass can be effectivelyintercepted; the gas substrate utilization rate is high; the method is applicable to efficient denitrification of denitrification anaerobic methane oxidation using methane as the substrate.

Description

technical field [0001] The invention relates to a high-efficiency denitrification method and a novel membrane aeration membrane bioreactor for realizing the method, belonging to the technical field of sewage biological denitrification. Background technique [0002] Membrane biological reactor (membrane biological reactor, MBR) is a high-efficiency sewage (waste) water treatment system combined with biochemical reactor and membrane separation technology. It can effectively retain the activated sludge in the biochemical reactor, and has a good solid-liquid separation effect. It can effectively improve the quality of the effluent and increase the residence time (SRT) of the activated sludge, so that the biomass in the biochemical reactor is greatly increased. . The increase of sludge residence time can not only reduce the generation of excess sludge and reduce the cost of subsequent treatment, but also enable some slow-growing autotrophic bacteria to be quickly enriched in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34C02F101/16
CPCC02F3/2813C02F3/282C02F3/348C02F2101/16
Inventor 谢国俊丁杰聂文博任南琪刘冰峰邢德峰
Owner HARBIN INST OF TECH
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