CN114164085A - Anaerobic and aerobic combined fermentation process system - Google Patents
Anaerobic and aerobic combined fermentation process system Download PDFInfo
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Abstract
The invention provides an anaerobic and aerobic combined fermentation process system, which comprises an anaerobic fermentation tank and an aerobic fermentation tank, wherein fermentation gas used for fermentation is introduced into the anaerobic fermentation tank and the aerobic fermentation tank from the bottom; the upper ends of the anaerobic fermentation tank and the aerobic fermentation tank are respectively provided with a fermented tail gas outlet; the anaerobic fermentation tank is connected with the aerobic fermentation tank through an intermediate storage tank; anaerobic fermentation liquid after fermentation in the anaerobic fermentation tank can enter the aerobic fermentation tank through the intermediate storage tank and is fermented in the aerobic fermentation tank; the feed protein and the grease can be produced by taking carbon monoxide, carbon dioxide, hydrogen, air and the like as raw materials through specific microbial fermentation.
Description
Technical Field
The invention relates to the field of biological fermentation, in particular to a process system for anaerobic and aerobic combined fermentation.
Background
With the international and domestic emphasis on carbon emission reduction and carbon recovery, the carbon dioxide fixing technology is widely applied, and the technology for fixing carbon dioxide by a biological method is continuously developed. The fermentation process taking carbon monoxide and carbon dioxide as raw materials has practical application, and on the basis of a one-stage anaerobic system which has been practically applied, an anaerobic and aerobic combined fermentation process system is developed, so that the product can be more flexibly controlled.
Disclosure of Invention
The invention aims to solve the technical problems that a fermentation device in the prior art only can perform single aerobic or anaerobic fermentation, the use is not convenient enough, and the prior anaerobic fermentation tank is not provided with a tail gas treatment device generally, and if the tail gas is directly discharged into the air, the environment is polluted.
The technical scheme adopted by the invention for solving the technical problems is as follows: a process system for anaerobic and aerobic combined fermentation comprises an anaerobic fermentation tank and an aerobic fermentation tank, wherein fermentation gas used for fermentation is introduced into the anaerobic fermentation tank and the aerobic fermentation tank from the bottom; the upper ends of the anaerobic fermentation tank and the aerobic fermentation tank are respectively provided with a fermented tail gas outlet; the anaerobic fermentation tank is connected with the aerobic fermentation tank through an intermediate storage tank; anaerobic fermentation liquid after fermentation in the anaerobic fermentation tank can enter the aerobic fermentation tank through the intermediate storage tank and is fermented in the aerobic fermentation tank.
Further: the anaerobic fermentation tank is connected with an anaerobic strain seed tank, and anaerobic bacteria in the anaerobic strain seed tank can enter the upper part of the anaerobic fermentation tank through an anaerobic pump.
Further: the lower part of the anaerobic fermentation tank is provided with an anaerobic fermentation liquid outlet, a part of anaerobic fermentation liquid enters the anaerobic membrane separator through an anaerobic fermentation pump, and the rest anaerobic fermentation liquid enters the intermediate storage tank; the anaerobic membrane separator can separate anaerobic bacteria from anaerobic fermentation liquor, the separated anaerobic bacteria enter the anaerobic fermentation tank again from the upper part of the anaerobic fermentation tank, and the anaerobic fermentation liquor separated by the anaerobic membrane separator can flow into the intermediate storage tank; the anaerobic fermentation liquid in the intermediate storage tank can enter the aerobic fermentation tank through a delivery pump.
Further: the aerobic fermentation tank is connected with an aerobic strain sub-tank, and aerobic bacteria in the aerobic strain sub-tank can enter the upper part of the aerobic fermentation tank through an aerobic pump; the aerobic fermentation tank is filled with a nutrient medium, and anaerobic fermentation liquid entering the aerobic fermentation tank and the nutrient medium can be fermented by aerobic bacteria to generate aerobic fermentation liquid; the lower part of the aerobic fermentation tank is provided with an aerobic fermentation liquid outlet, a part of aerobic fermentation liquid enters the aerobic membrane separator through an aerobic fermentation pump, and the rest part of aerobic fermentation liquid flows into the concentration device; the aerobic membrane separator can separate aerobic bacteria from the aerobic fermentation liquid, the separated aerobic bacteria enter the aerobic fermentation tank again from the upper part of the aerobic fermentation tank, and the aerobic fermentation liquid separated by the aerobic membrane separator can flow into the concentration device.
Further: the anaerobic fermentation broth contains an anaerobic fermentation product acetate; the aerobic fermentation liquid contains feed protein and grease which are aerobic fermentation products; the concentration device can extract feed protein and grease from the aerobic fermentation liquor.
Further: the anaerobic fermentation tank and the aerobic fermentation tank can be provided with a plurality of groups according to the process requirements.
Further: and fermentation gases such as carbon monoxide and a carbon dioxide composition or a carbon monoxide, a carbon dioxide and a hydrogen composition are introduced into the anaerobic fermentation tank.
Further: the fermentation gas introduced into the aerobic fermentation tank is purified air.
Further: tail gas in the anaerobic fermentation tank is discharged into a boiler for incineration treatment; and tail gas in the aerobic fermentation tank is discharged into the air after passing through a water washing device.
Further: pressure gauges are arranged on the anaerobic fermentation tank and the aerobic fermentation tank; the fermentation pressure of the anaerobic fermentation tank is 6-10 bar; the fermentation pressure of the aerobic fermentation tank is 300 Pa.
The anaerobic and aerobic combined fermentation process system has the beneficial effects that the feed protein and the oil can be produced by taking carbon monoxide, carbon dioxide, hydrogen, air and the like as raw materials through specific microbial fermentation; the continuous fermentation process can flexibly control the product, greatly improves the production efficiency, and can lead the tail gas generated by the anaerobic fermentation tank into a boiler for incineration treatment, thereby realizing the reutilization of resources.
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The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of the present invention;
in the figure, 1, an anaerobic fermentation tank, 2, an aerobic fermentation tank, 3, an intermediate storage tank, 4, an anaerobic strain sub-tank, 5, an anaerobic pump, 6, an anaerobic fermentation liquid outlet, 7, an anaerobic fermentation pump, 8, an anaerobic membrane separator, 9, a conveying pump, 10, an aerobic strain sub-tank, 11, an aerobic pump, 12, an aerobic fermentation liquid outlet, 13, an aerobic membrane separator, 14, a concentration device, 15, a boiler, 16 and a washing device are arranged.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
As shown in figure 1, a process system for anaerobic and aerobic combined fermentation comprises an anaerobic fermentation tank 1 and an aerobic fermentation tank 2, wherein fermentation gas for fermentation is introduced into the anaerobic fermentation tank 1 and the aerobic fermentation tank 2 from the bottom; the upper ends of the anaerobic fermentation tank 1 and the aerobic fermentation tank 2 are both tail gas discharge ports after fermentation; the anaerobic fermentation tank 1 is connected with the aerobic fermentation tank 2 through an intermediate storage tank 3; the anaerobic fermentation liquid after fermentation in the anaerobic fermentation tank 1 can enter the aerobic fermentation tank 2 through the intermediate storage tank 3 and is fermented in the aerobic fermentation tank 2.
The invention provides an anaerobic and aerobic combined fermentation process system, which can produce feed protein and grease by using carbon monoxide, carbon dioxide, hydrogen, air and the like as raw materials through specific microbial fermentation.
The anaerobic fermentation tank 1 is connected with an anaerobic strain sub-tank 4, and anaerobic bacteria in the anaerobic strain sub-tank 4 can enter the upper part of the anaerobic fermentation tank 1 through an anaerobic pump 5.
An anaerobic fermentation liquid outlet 6 is arranged at the lower part of the anaerobic fermentation tank 1, a part of anaerobic fermentation liquid enters an anaerobic membrane separator 8 through an anaerobic fermentation pump 7, and the rest anaerobic fermentation liquid enters the intermediate storage tank 3; the anaerobic membrane separator 8 can separate anaerobic bacteria from anaerobic fermentation liquor, and the separated anaerobic bacteria enter the anaerobic fermentation tank 1 again from the upper part of the anaerobic fermentation tank 1, and the anaerobic fermentation liquor separated by the anaerobic membrane separator 8 can flow into the intermediate storage tank 3; the anaerobic fermentation liquid in the intermediate storage tank 3 can enter the aerobic fermentation tank 2 through a delivery pump 9.
When the anaerobic fermentation tank works, anaerobic bacteria enter the anaerobic fermentation tank 1 from the upper part of the anaerobic fermentation tank 1 through the anaerobic pump 5, a part of anaerobic fermentation liquid after anaerobic bacteria fermentation enters the anaerobic membrane separator 8 through the anaerobic fermentation pump 7, the anaerobic membrane separator 8 can separate the anaerobic bacteria in the anaerobic fermentation liquid and enter the anaerobic fermentation tank 1 from the upper part of the anaerobic fermentation tank 1 again, the rest part of anaerobic fermentation liquid flows into the intermediate storage tank 3, and the anaerobic fermentation liquid in the intermediate storage tank 3 enters the aerobic fermentation tank 2 through the delivery pump 9.
The aerobic fermentation tank 2 is connected with an aerobic strain sub-tank 10, and aerobic bacteria in the aerobic strain sub-tank 10 can enter the upper part of the aerobic fermentation tank 2 through an aerobic pump 11; the aerobic fermentation tank 2 is filled with nutrient medium, and the anaerobic fermentation liquid entering the aerobic fermentation tank 2 and the nutrient medium can be fermented by aerobic bacteria to generate aerobic fermentation liquid; the lower part of the aerobic fermentation tank 2 is provided with an aerobic fermentation liquor outlet 12, a part of aerobic fermentation liquor enters an aerobic membrane separator 13 through an aerobic pump 11, and the rest part of aerobic fermentation liquor flows into a concentration device 14; the aerobic membrane separator 13 can separate aerobic bacteria from the aerobic fermentation liquid, and the separated aerobic bacteria enter the aerobic fermentation tank 2 again from the upper part of the aerobic fermentation tank 2, and the aerobic fermentation liquid separated by the aerobic membrane separator 13 can flow into the concentration device 14.
The anaerobic fermentation broth contains an anaerobic fermentation product acetate; the aerobic fermentation liquid contains feed protein and grease which are aerobic fermentation products; the concentration device 14 can extract feed protein and grease from the aerobic fermentation liquor.
The anaerobic fermentation tank 1 and the aerobic fermentation tank 2 can be provided with a plurality of groups according to the process requirements. Anaerobic fermentation product acetate is contained in the anaerobic fermentation liquid, the acetate enters the aerobic fermentation tank 2 and the nutrient medium in the aerobic fermentation tank 2 is fermented by aerobic bacteria to produce feed protein and grease; the aerobic fermentation liquid flows into the concentration device 14, the concentration device 14 can extract the feed protein and the oil in the aerobic fermentation liquid, the rest part of the aerobic fermentation liquid can be circulated to the anaerobic fermentation tank 1 for continuous fermentation, and the feed protein and the oil are continuously extracted through the concentration device 14; anaerobic fermentation jar 1 and aerobic fermentation jar 2 are the series connection setting, can be according to the size of production scale, with a plurality of groups anaerobic fermentation jar 1 and aerobic fermentation jar 2 parallelly connected setting in order to improve production efficiency.
The fermentation gas of carbon monoxide and carbon dioxide or the composition of carbon monoxide, carbon dioxide and hydrogen is introduced into the anaerobic fermentation tank 1.
The fermentation gas introduced into the aerobic fermentation tank 2 is purified air. The tail gas in the anaerobic fermentation tank 1 is discharged into a boiler 15 for incineration treatment; and the tail gas in the aerobic fermentation tank 2 is discharged into the air after passing through a water washing device 16.
Pressure gauges are arranged on the anaerobic fermentation tank 1 and the aerobic fermentation tank 2; the fermentation pressure of the anaerobic fermentation tank 1 is 6-10 bar; the fermentation pressure of the aerobic fermentation tank 2 is 300 Pa.
When the anaerobic fermentation tank works, the pressure of the anaerobic fermentation tank 1 is kept at 6-10bar, carbon monoxide and a carbon dioxide composition or a carbon monoxide, carbon dioxide and hydrogen composition is introduced into the anaerobic fermentation tank 1 from the bottom, and tail gas generated by anaerobic bacteria fermentation is discharged into a boiler 15 for incineration treatment; anaerobic fermentation liquid generated by fermentation in the anaerobic fermentation tank 1 enters the aerobic fermentation tank 2 through the intermediate storage tank 3, purified air is introduced into the aerobic fermentation tank 2 from the bottom, the pressure in the aerobic fermentation tank 2 is kept at 300Pa, feed protein and grease are generated through continuous fermentation in the tank, and tail gas in the aerobic fermentation tank 2 passes through the upper end of the aerobic fermentation tank 2 and is directly discharged into the air after passing through the washing device 16.
Example (b): the feed is produced by taking a composition of carbon monoxide, carbon dioxide and hydrogen as raw materials, adding strains from a seeding tank, and performing anaerobic fermentation and aerobic fermentation. The volume of the anaerobic fermentation tank 1 is 300 cubic meters, the working condition pressure is 8bar, the working condition temperature is 60 ℃, an intermediate product acetate is produced, and continuous fermentation is carried out. The volume of the aerobic fermentation tank 2 is 200 cubic meters, the working condition pressure is 300Pa, the working condition temperature is 30 ℃, acetate and nutrient medium in the aerobic fermentation tank 2 are used as raw materials, continuous fermentation is carried out, and the feed protein and the grease are produced through aerobic bacteria fermentation.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic representation of the term does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The utility model provides a process systems of anaerobism and aerobic combined fermentation, includes anaerobic fermentation jar (1) and aerobic fermentation jar (2), its characterized in that: fermentation gas used for fermentation is introduced into the anaerobic fermentation tank (1) and the aerobic fermentation tank (2) from the bottom;
the upper ends of the anaerobic fermentation tank (1) and the aerobic fermentation tank (2) are respectively a tail gas outlet after fermentation;
the anaerobic fermentation tank (1) is connected with the aerobic fermentation tank (2) through an intermediate storage tank (3);
anaerobic fermentation liquid after fermentation in the anaerobic fermentation tank (1) can enter the aerobic fermentation tank (2) through the intermediate storage tank (3) and is fermented through the aerobic fermentation tank (2).
2. The process system for combined anaerobic and aerobic fermentation according to claim 1, wherein: the anaerobic fermentation tank (1) is connected with an anaerobic strain seed tank (4), and anaerobic bacteria in the anaerobic strain seed tank (4) can enter the upper part of the anaerobic fermentation tank (1) through an anaerobic pump (5).
3. The process system for combined anaerobic and aerobic fermentation according to claim 2, wherein: an anaerobic fermentation liquid outlet (6) is formed in the lower portion of the anaerobic fermentation tank (1), a part of anaerobic fermentation liquid enters an anaerobic membrane separator (8) through an anaerobic fermentation pump (7), and the rest anaerobic fermentation liquid enters the intermediate storage tank (3);
the anaerobic membrane separator (8) can separate anaerobic bacteria from anaerobic fermentation liquor, the separated anaerobic bacteria enter the anaerobic fermentation tank (1) again from the upper part of the anaerobic fermentation tank (1), and the anaerobic fermentation liquor separated by the anaerobic membrane separator (8) can flow into the intermediate storage tank (3);
anaerobic fermentation liquid in the intermediate storage tank (3) can enter the aerobic fermentation tank (2) through a delivery pump (9).
4. The process system for combined anaerobic and aerobic fermentation according to claim 1, wherein: the aerobic fermentation tank (2) is connected with an aerobic strain sub-tank (10), and aerobic bacteria in the aerobic strain sub-tank (10) can enter the upper part of the aerobic fermentation tank (2) through an aerobic pump (11);
the aerobic fermentation tank (2) is filled with a nutrient medium, and anaerobic fermentation liquid entering the aerobic fermentation tank (2) and the nutrient medium can be fermented by aerobic bacteria to generate aerobic fermentation liquid;
an aerobic fermentation broth outlet (12) is arranged at the lower part of the aerobic fermentation tank (2), a part of aerobic fermentation broth enters an aerobic membrane separator (13) through an aerobic pump (11), and the rest part of aerobic fermentation broth flows into a concentration device (14);
the aerobic membrane separator (13) can separate aerobic bacteria from the aerobic fermentation liquor, the separated aerobic bacteria enter the aerobic fermentation tank (2) again from the upper part of the aerobic fermentation tank (2), and the aerobic fermentation liquor separated by the aerobic membrane separator (13) can flow into the concentration device (14).
5. The process system for combined anaerobic and aerobic fermentation according to claim 4, wherein: the anaerobic fermentation broth contains an anaerobic fermentation product acetate;
the aerobic fermentation liquid contains feed protein and grease which are aerobic fermentation products;
the concentration device (14) can extract feed protein and grease from the aerobic fermentation liquor.
6. The process system for combined anaerobic and aerobic fermentation according to claim 1, wherein: the anaerobic fermentation tank (1) and the aerobic fermentation tank (2) can be provided with a plurality of groups according to the process requirements.
7. The process system for combined anaerobic and aerobic fermentation according to claim 1, wherein: the fermentation gas of carbon monoxide and carbon dioxide or the composition of carbon monoxide, carbon dioxide and hydrogen is introduced into the anaerobic fermentation tank (1).
8. The process system for combined anaerobic and aerobic fermentation according to claim 1, wherein: the fermentation gas introduced into the aerobic fermentation tank (2) is purified air.
9. The process system for combined anaerobic and aerobic fermentation according to claim 1, wherein: the tail gas in the anaerobic fermentation tank (1) is discharged into a boiler (15) for incineration treatment;
and tail gas in the aerobic fermentation tank (2) is discharged into the air after passing through a water washing device (16).
10. The process system for combined anaerobic and aerobic fermentation according to claim 1, wherein: pressure gauges are arranged on the anaerobic fermentation tank (1) and the aerobic fermentation tank (2);
the fermentation pressure of the anaerobic fermentation tank (1) is 6-10 bar;
the fermentation pressure of the aerobic fermentation tank (2) is 300 Pa.
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| CN114350500A (en) * | 2022-03-18 | 2022-04-15 | 领先生物农业股份有限公司 | Membrane-covered aerobic fermentation circulating device and circulating method |
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