CN217103245U - Membrane aeration biological reaction integrated device for quickly starting synchronous denitrification and decarbonization - Google Patents
Membrane aeration biological reaction integrated device for quickly starting synchronous denitrification and decarbonization Download PDFInfo
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- CN217103245U CN217103245U CN202123339460.1U CN202123339460U CN217103245U CN 217103245 U CN217103245 U CN 217103245U CN 202123339460 U CN202123339460 U CN 202123339460U CN 217103245 U CN217103245 U CN 217103245U
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Abstract
The utility model discloses a membrane aeration biological reaction integrated device for quick start synchronous denitrification removes carbon relates to water treatment facilities technical field. The membrane aeration biological reaction integrated device comprises a first reaction container and a second reaction container, wherein the first reaction container is communicated with the second reaction container; an aeration film and an aeration hose are arranged in the first reaction container; the aeration membrane is connected with a first air inlet pipe and an air outlet pipe, the first air inlet pipe is connected with the membrane fan, the first gas flowmeter and the first pressure transmitter, and the air outlet pipe is provided with a second gas flowmeter and a second pressure transmitter; the aeration hose is connected with a second air inlet pipe, the second air inlet pipe is connected with a gas stirring fan and a third gas flowmeter; a sludge reflux pump is arranged between the first reaction container and the second reaction container. The membrane aeration biological reaction integrated device can realize the removal of particles, and has the functions of synchronous nitrification and denitrification reaction and high-efficiency denitrification by utilizing organic matters in sewage.
Description
Technical Field
The utility model relates to the technical field of water treatment equipment, in particular to a membrane aeration biological reaction integrated device for quickly starting synchronous denitrification and decarbonization.
Background
Under the new background of the target strategy of 'double carbon' and 'sewage recycling' implemented by the country, and the requirement of the sewage treatment industry on total nitrogen removal is more and more strict, the requirements on development and application of a new sewage treatment technology and on energy conservation and consumption reduction become more urgent. The sewage treatment device on the current market has the disadvantages that: the energy consumption of the reaction treatment equipment is high; sludge expansion is easy to occur in the biochemical reaction tank, so that the treatment effect of the system is extremely unstable; the requirement on operation and maintenance personnel is high, and the personnel cost is increased; the cost of the agent is high, and the total nitrogen of the sewage needs to be treated by an external carbon source; the occupied area is large, thereby increasing the overall investment cost.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the purpose of the utility model is realized through following technical scheme:
the membrane aeration biological reaction integrated device for quickly starting synchronous denitrification and decarbonization comprises a first reaction container and a second reaction container, wherein the first reaction container is communicated with the second reaction container; an aeration membrane and an aeration hose are arranged in the first reaction container, and the aeration hose is positioned below the aeration membrane; the aeration membrane is connected with a first air inlet pipe and an air outlet pipe, the first air inlet pipe is connected with the membrane fan, the first air inlet pipe is provided with a first gas flowmeter and a first pressure transmitter, and the air outlet pipe is provided with a second gas flowmeter and a second pressure transmitter; the aeration hose is connected with a second air inlet pipe, the second air inlet pipe is connected with an air stirring fan, and a third air flow meter is arranged on the second air inlet pipe; a sludge return pipe is arranged between the first reaction container and the second reaction container, and a sludge return pump is arranged on the sludge return pipe; the second reaction vessel is also provided with a sludge discharge port.
Furthermore, a dissolved oxygen tester is arranged in the first reaction container and used for testing the oxygen content in the first reaction container.
Furthermore, a mixed liquor suspended solid concentration tester (MLSS) is arranged in the first reaction container and is used for testing the concentration of activated sludge (containing autotrophic nitrifying bacteria and heterotrophic denitrifying bacteria) in the first reaction container.
Further, the sludge return pipe is connected with the bottom of the first reaction container and the bottom of the second reaction container.
Furthermore, an aeration membrane fixing frame and a plurality of aeration membranes are arranged in the first reaction container, and each aeration membrane is fixed on the aeration membrane fixing frame.
Furthermore, a first stop valve is arranged on the first air inlet pipe and is positioned between the first pressure transmitter and the membrane fan.
Furthermore, the air outlet pipe is provided with a second stop valve, and the second stop valve is positioned between the second pressure transmitter and the aeration hose.
Furthermore, a third stop valve is arranged on the second air inlet pipe.
Furthermore, a water inlet is formed in the bottom of the first reaction container, and a water outlet is formed in the upper portion of the second reaction container.
Further, the first reaction vessel is provided with a manual sampling port.
The utility model discloses a membrane aeration biological reaction integrated device for quick start synchronous denitrogenation removes carbon can realize getting rid of SS (particulate matter), takes place synchronous nitrification, denitrification and utilizes COD (organic matter) in the sewage to reach the effect of high-efficient denitrogenation to reach sewage treatment's target. Compared with the prior art, the method has the advantages that:
1. the energy is saved, the consumption is reduced, the sludge does not need to be refluxed by power, a mechanical stirrer is not used, the mixed liquid is mixed by using intermittent gas stirring, and the reduction of the operation cost can be realized.
2. The treatment effect is good, the risk of sludge bulking is avoided, the high sludge retention time of microorganisms can be realized by the application of a pure membrane method, and the stable operation of a reaction device can be realized by the efficient growth of autotrophic nitrifying bacteria (AOB ammonia oxidizing bacteria, AOA ammonia oxidizing archaea and NOB nitrite oxidizing bacteria).
3. And (3) pollutant removal and layering treatment, namely, ammonia nitrogen oxidation occurs in the inner layer and denitrification of nitrate nitrogen and nitrite nitrogen occurs in the outer layer.
4. The oxygen utilization efficiency in the aeration membrane is high, and the aeration membrane biological reaction device is a novel aeration membrane biological reaction device.
5. And the total nitrogen is removed by using pollutants such as organic matters in the sewage without adding an external carbon source.
6. The occupied area is small, the oxidation of ammonia nitrogen in the aerobic tank and the removal of total nitrogen in the anoxic tank can be realized in the same reactor, the sewage treatment efficiency is effectively improved on the basis of not changing the occupied area of the original sewage treatment facility, and the purpose of upgrading or increasing the volume is achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.
Fig. 1 is a schematic structural diagram provided in the embodiment of the present invention.
FIG. 2 is a schematic diagram of the embodiment of the present invention after biofilm formation of microorganisms on an aeration membrane.
The labels in the figures illustrate:
1-a water inlet; 2-an aeration hose; 3-aeration membrane fixing frame; 4-an aerated film; 5-a membrane fan; 6-a first stop valve; 7-a first pressure transmitter; 8-a first gas flow meter; 9-a gas stirring fan; 10-a third stop valve; 11-a third flow meter; 12-a second stop valve; 13-a second gas flow meter; 14-a second pressure transmitter; 15-a first reaction vessel water outlet; 16-sludge recirculation pump; 17-a water outlet; 18-dissolved oxygen meter; 19-mixed liquid suspended solid concentration measuring instrument; 20-a manual sampling port; 21-a first reaction vessel; 22-a second reaction vessel; 23-a sludge discharge port; 41-autotrophic nitrifying bacteria; 42-heterotrophic denitrifying bacteria.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Please refer to fig. 1, fig. 1 shows a membrane aeration biological reaction integrated device for rapidly starting and synchronously removing nitrogen and carbon provided by the embodiment of the present invention, which includes a first reaction container 21 and a second reaction container 22, wherein the upper portion of the first reaction container 21 is provided with a first reaction container water outlet 15, the first reaction container water outlet 15 is communicated with the second reaction container 22, and the sewage treated in the first reaction container 21 can overflow to the second reaction container 22 through the first reaction container water outlet 15. A sludge return pipe is arranged between the first reaction container 21 and the second reaction container 22 and is connected with the bottom of the first reaction container 21 and the bottom of the second reaction container 22, a sludge return pump 16 is arranged on the sludge return pipe, and the sludge return pump 16 can pump sludge deposited in the second reaction container 22 to the first reaction container 21. The bottom of the first reaction vessel is provided with a water inlet 1, and sewage to be treated enters the first reaction vessel 21 from the water inlet 1; the middle part of the first reaction container is provided with a manual sampling port 20 which can be used for manually sampling the sewage in the first reaction container. The bottom of the second reaction vessel is provided with a sludge discharge port 23 which can be used for discharging sludge deposited in the second reaction vessel; the upper part of the second reaction container is provided with a water outlet 17 for discharging sewage treated by the device.
A dissolved oxygen determinator 18 and a mixed liquid suspended solid concentration determinator 19 are arranged in the first reaction vessel 21; the dissolved oxygen determinator 18 is used for determining the oxygen content in the first reaction vessel, and the mixed liquid suspended solid concentration determinator 19 is used for determining the concentration of activated sludge (containing autotrophic nitrifying bacteria and heterotrophic denitrifying bacteria) in the first reaction vessel.
An aeration membrane fixing frame 3, an aeration membrane 4 and an aeration hose 2 are also arranged in the first reaction vessel 21. The aeration film 4 is a plurality of, and each aeration film 4 is fixed on the aeration film fixing frame 3, and the aeration hose 2 is located below the aeration film fixing frame 3. The aeration membrane 4 is tubular and is connected with a first air inlet pipe and an air outlet pipe. The first air inlet pipe is connected with the membrane fan 5, and the membrane fan 5 sends air to the aeration membrane 4 through the first air inlet pipe and then discharges the air through the air outlet pipe. Be equipped with first check valve 6, first pressure transmitter 7 and first gas flowmeter 8 on the first intake pipe, first check valve 6 is used for controlling the switch of admitting air of first intake pipe, and first pressure transmitter 7 is used for controlling the admission pressure of first intake pipe, and first gas flowmeter 8 is used for showing the inflow of first intake pipe. And a second stop valve 12, a second gas flowmeter 13 and a second pressure transmitter 14 are arranged on the gas outlet pipe, the second stop valve 12 is used for controlling a gas outlet switch of the gas outlet pipe, the second gas flowmeter 13 is used for displaying the gas outlet flow of the gas outlet pipe, and the second pressure transmitter 14 is used for controlling the gas outlet pressure of the gas outlet pipe. The aeration hose 2 is connected with a second air inlet pipe, the second air inlet pipe is connected with an air stirring fan 9, and the air stirring fan 9 blows air into the first reaction container through the second air inlet pipe. The aeration hose 2 is provided with a third stop valve 10 and a third gas flow meter 11, the third stop valve 10 is used for controlling an air inlet switch of the second air inlet pipe, and the third gas flow meter 11 is used for displaying the air inlet flow of the second air inlet pipe.
The utility model provides a membrane aeration biological reaction integrated device for quick start-up synchronous denitrogenation removes carbon, this device work flow includes three stage, and the first stage is the mud membrane intergrowth stage of quick start-up, and the second stage is quick start-steady state transition stage, and the third stage is pure embrane method stage under the steady state.
In the quick starting stage of the reaction device, sewage enters a first reaction container 21 from a water inlet 1, activated sludge (comprising autotrophic nitrifying bacteria and heterotrophic denitrifying bacteria, wherein the autotrophic nitrifying bacteria comprise AOB ammonia oxidizing bacteria, AOA ammonia oxidizing archaea and NOB nitrite oxidizing bacteria, and the heterotrophic denitrifying bacteria comprise autotrophic denitrifying bacteria such as glomerulonephritis, pseudomonas denitrificans and the like) with the concentration of 3500 plus 4000mg/L (measured by a mixed liquid suspended solid concentration measuring instrument 19) is inoculated in the first reaction container 21, a membrane fan 5 and an air stirring fan 9 are started, a first pressure transmitter 7 is regulated to control the air inlet pressure of the stage to be 250 plus 300mbar, so that a aeration membrane 4 is subjected to bubble-free aeration, and the air stirring fan 5 is controlled to intermittently inlet air to realize the complete mixing of the mixed liquid in the first reaction container 21. The mixed liquid in the first reaction container 21 enters the second reaction container 22 through the water outlet 15 of the first reaction container, after the activated sludge in the mixed liquid naturally settles in the second reaction container 22, the activated sludge flows back to the first reaction container 21 through the sludge return pump 16, in the process, the aeration membrane 4 realizes the membrane sticking growth of the autotrophic nitrobacteria inner layer (the aeration environment is suitable for the growth of the autotrophic nitrobacteria), and the membrane sticking growth of the heterotrophic denitrifying bacteria outer layer (the anoxic environment without aeration is suitable for the growth of the heterotrophic denitrifying bacteria), so that the quick biofilm formation of microorganisms in the first reaction container 21 is realized. As shown in the schematic diagram of fig. 2 after the microorganisms are biofilm-coated on the aeration membrane 4, the autotrophic nitrifying bacteria 41 on the inner layer can permeate the aeration membrane 4 to obtain oxygen inside the aeration membrane 4, and the heterotrophic denitrifying bacteria 42 on the outer layer are in a non-aerated anoxic environment.
In the starting-stable transition stage of the reaction device, the reflux frequency of the activated sludge is gradually reduced, the sludge discharge frequency of the second reaction container 22 is increased, and the concentration of the activated sludge in the mixed liquid in the first reaction container 21 is gradually reduced to 600mg/L when the concentration of the suspended solid in the mixed liquid is measured by the concentration measuring instrument 19, so that the transition of the reaction device to the stable state stage is completed.
In the steady state stage, the gas stirring fan 9 is turned off, the gas inlet pressure and the gas outlet pressure of the aeration membrane 4 in the first reaction vessel 21 are controlled by the first pressure transmitter 7 and the second pressure transmitter 14, the gas inlet pressure of the aeration membrane 4 is controlled at 300mbar, and the gas outlet pressure is controlled at 240mbar, respectively, of 250 and 200. In the stabilization stage, autotrophic nitrifying bacteria 41 grow in the inner layer of the biological membrane and can generate the oxidation of ammonia nitrogen in sewage; heterotrophic denitrifying bacteria 42 grow on the outer layer of the biological membrane, the dissolved oxygen concentration of the mixed solution is below 0.5mg/L (measured by a dissolved oxygen measuring instrument 18), the mixed solution is an anoxic environment, is suitable for the growth of the heterotrophic denitrifying bacteria, generates the denitrification of nitrate nitrogen and nitrite nitrogen, and can realize the removal of total nitrogen and COD in the sewage.
In the stabilization phase, in order to facilitate the thickness control of the biofilm, the gas scrubbing can be intermittently performed, namely the gas inlet pressure is increased to 400-500mbar by the first pressure transmitter 7, and the control of the thickness of the biofilm is realized by bubbling with larger gas amount.
Aiming at the growth of microorganisms, the aeration membrane of the device realizes the membrane-sticking growth of the inner layer of autotrophic nitrifying bacteria and the growth of the outer layer of heterotrophic denitrifying bacteria; the pure membrane method can prevent the sludge from swelling and realize the layered treatment of pollutant removal, namely the inner layer generates ammonia nitrogen oxidation and the outer layer generates denitrification of nitrate nitrogen and nitrite nitrogen; aiming at the aspect of energy saving and consumption reduction, the reduction of the operation cost is realized under the conditions of efficiently utilizing oxygen in the aeration membrane, an internal carbon source in sewage and no sludge reflux pump and stirrer, the sewage treatment efficiency is effectively improved on the basis of not changing the land occupation of the original sewage treatment facility, and the purpose of upgrading or increasing the volume is achieved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A membrane aeration biological reaction integrated device for quickly starting synchronous denitrification and carbon removal is characterized by comprising a first reaction container and a second reaction container, wherein the first reaction container is communicated with the second reaction container;
an aeration membrane and an aeration hose are arranged in the first reaction container, and the aeration hose is positioned below the aeration membrane; the aeration membrane is connected with a first air inlet pipe and an air outlet pipe, the first air inlet pipe is connected with the membrane fan, the first air inlet pipe is provided with a first gas flowmeter and a first pressure transmitter, and the air outlet pipe is provided with a second gas flowmeter and a second pressure transmitter; the aeration hose is connected with a second air inlet pipe, the second air inlet pipe is connected with an air stirring fan, and a third air flow meter is arranged on the second air inlet pipe;
a sludge return pipe is arranged between the first reaction container and the second reaction container, and a sludge return pump is arranged on the sludge return pipe; the second reaction vessel is also provided with a sludge discharge port.
2. The membrane aeration biological reaction integrated device for rapidly starting synchronous denitrification and carbon removal as recited in claim 1, wherein a dissolved oxygen tester is further arranged in the first reaction vessel.
3. The membrane aeration biological reaction integrated device for rapidly starting synchronous denitrification and carbon removal as recited in claim 2, wherein a mixed liquor suspended solid concentration tester is further arranged in the first reaction vessel.
4. The membrane aeration biological reaction integrated device for rapidly starting synchronous denitrification and carbon removal as recited in claim 3, wherein the sludge return pipe is connected with the bottom of the first reaction vessel and the bottom of the second reaction vessel.
5. The membrane aeration biological reaction integrated device for rapidly starting synchronous denitrification and carbon removal as claimed in claim 4, wherein an aeration membrane fixing frame and a plurality of aeration membranes are arranged in the first reaction vessel, and each aeration membrane is fixed on the aeration membrane fixing frame.
6. The membrane aeration biological reaction integrated device for rapidly starting synchronous denitrification and carbon removal as recited in claim 5, wherein the first air inlet pipe is provided with a first stop valve, and the first stop valve is positioned between the first pressure transmitter and the membrane fan.
7. The membrane aeration biological reaction integrated device for rapidly starting synchronous denitrification and decarbonization as claimed in claim 6, wherein a second stop valve is arranged on the gas outlet pipe, and the second stop valve is positioned between the second pressure transmitter and the aeration hose.
8. The membrane aeration biological reaction integrated device for rapidly starting and synchronously denitrifying and decarbonizing the water according to the claim 7, which is characterized in that a third stop valve is arranged on the second air inlet pipe.
9. The membrane aeration biological reaction integrated device for rapidly starting synchronous denitrification and carbon removal as recited in claim 8, wherein the bottom of the first reaction vessel is provided with a water inlet, and the upper part of the second reaction vessel is provided with a water outlet.
10. The membrane aeration biological reaction integrated device for the rapid start-up of the synchronous denitrification and decarbonization as recited in claim 8, wherein the first reaction vessel is provided with a manual sampling port.
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| CN202123339460.1U CN217103245U (en) | 2021-12-28 | 2021-12-28 | Membrane aeration biological reaction integrated device for quickly starting synchronous denitrification and decarbonization |
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| CN202123339460.1U CN217103245U (en) | 2021-12-28 | 2021-12-28 | Membrane aeration biological reaction integrated device for quickly starting synchronous denitrification and decarbonization |
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Address after: 518000 j395, floor 3, port building, maritime center, No. 59, Linhai Avenue, Nanshan street, Qianhai Shenzhen Hong Kong cooperation zone, Shenzhen, Guangdong Patentee after: China Resources Environmental Protection Applied Technology Research (Shenzhen) Co.,Ltd. Address before: 518000 Room 201, building A, No. 1, Qian Wan Road, Qianhai Shenzhen Hong Kong cooperation zone, Shenzhen, Guangdong (Shenzhen Qianhai business secretary Co., Ltd.) Patentee before: Shenzhen runke environmental protection application technology research Co.,Ltd. |