CN114438136A - Method and system for preparing ethanol by efficient gas fermentation - Google Patents
Method and system for preparing ethanol by efficient gas fermentation Download PDFInfo
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- CN114438136A CN114438136A CN202210085353.0A CN202210085353A CN114438136A CN 114438136 A CN114438136 A CN 114438136A CN 202210085353 A CN202210085353 A CN 202210085353A CN 114438136 A CN114438136 A CN 114438136A
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 302
- 238000000855 fermentation Methods 0.000 title claims abstract description 140
- 230000004151 fermentation Effects 0.000 title claims abstract description 138
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000000926 separation method Methods 0.000 claims abstract description 83
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 239000012528 membrane Substances 0.000 claims description 27
- 241000894006 Bacteria Species 0.000 claims description 18
- 238000004821 distillation Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000002028 Biomass Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 21
- 238000004064 recycling Methods 0.000 abstract description 10
- 235000015097 nutrients Nutrition 0.000 description 22
- 241001052560 Thallis Species 0.000 description 21
- 239000002994 raw material Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 102000004169 proteins and genes Human genes 0.000 description 3
- 108090000623 proteins and genes Proteins 0.000 description 3
- 241000193403 Clostridium Species 0.000 description 2
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 2
- -1 iron ions Chemical class 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002481 ethanol extraction Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000006286 nutrient intake Nutrition 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/02—Preparation of oxygen-containing organic compounds containing a hydroxy group
- C12P7/04—Preparation of oxygen-containing organic compounds containing a hydroxy group acyclic
- C12P7/06—Ethanol, i.e. non-beverage
- C12P7/08—Ethanol, i.e. non-beverage produced as by-product or from waste or cellulosic material substrate
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/12—Bioreactors or fermenters specially adapted for specific uses for producing fuels or solvents
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/04—Filters; Permeable or porous membranes or plates, e.g. dialysis
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M43/00—Combinations of bioreactors or fermenters with other apparatus
- C12M43/02—Bioreactors or fermenters combined with devices for liquid fuel extraction; Biorefineries
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M47/00—Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
- C12M47/02—Separating microorganisms from the culture medium; Concentration of biomass
Abstract
The application specifically relates to a method and a system for preparing ethanol by high-efficiency gas fermentation, which belong to the field of biological fermentation and comprise the following steps: fermenting the industrial tail gas to obtain mash; carrying out solid-liquid separation on the mash to obtain a mash clear phase and a thallus thick phase; and carrying out liquid-liquid separation on the clear mash phase to obtain a dealcoholized clear phase and an ethanol concentrated phase, and recycling the dealcoholized clear phase to fermentation. The dealcoholization clear phase is separated from mash obtained by fermenting industrial tail gas, and is recycled to the fermentation process. When the concentration of the ethanol in the mash is too high, the liquid output amount of the mash is increased, namely the liquid output amount of the dealcoholization clear phase is increased, and then the dealcoholization clear phase is returned to the mash, namely the concentration of the ethanol in the mash is reduced. By the arrangement, ethanol can be continuously extracted from mash in the process of preparing ethanol by fermentation, so that the concentration of the ethanol is stably controlled, and meanwhile, most of water is recycled to the fermentation along with dealcoholization clean phase, so that the water consumption of unit ethanol is greatly reduced.
Description
Technical Field
The application relates to the field of biological fermentation, in particular to a method and a system for preparing ethanol by high-efficiency gas fermentation.
Background
At present, the process for producing alcohol by using CO-containing industrial gas as a raw material through a fermentation method has been successfully applied industrially, and the environmental protection benefit and the economic benefit are widely accepted. The clostridium used for preparing ethanol by industrial gas fermentation has low tolerance to high-concentration ethanol, and the concentration of the ethanol in mash needs to be stably maintained in order to ensure the normal growth and reproduction of the clostridium. In the prior art, single-stage fermentation or two-stage fermentation is usually adopted to maintain the concentration of ethanol in mash, the concentration of ethanol in single-stage fermentation is lower, but the water consumption of unit ethanol is higher; the two-stage fermentation process has low fermentation efficiency and low ethanol and protein yield.
Disclosure of Invention
The application provides a method and a system for preparing ethanol by high-efficiency gas fermentation, which aim to solve the technical problems that the ethanol preparation method by fermentation in the prior art cannot simultaneously meet the requirements of stably controlling the ethanol concentration and the low unit ethanol water consumption.
In a first aspect, the present application provides a method for producing ethanol by high-efficiency gas fermentation, comprising the steps of:
fermenting the industrial tail gas to obtain mash;
carrying out solid-liquid separation on the mash to obtain a mash clear phase and a thallus thick phase;
carrying out liquid-liquid separation on the mash clear phase to obtain a dealcoholized clear phase and ethanol;
wherein the dealcoholized clear phase is recycled to the fermentation.
Optionally, the concentrated phase of the thallus is recycled to the fermentation.
Optionally, the concentrated phases of the thalli are recycled to the fermentation according to volume percentage, and the recycled concentrated phases of the thalli account for 0-100% of the total concentrated phases of the thalli.
Optionally, the thallus concentration in the thallus concentrated phase is 1.01-10 times of the thallus concentration in the mash.
Optionally, the recovered dealcoholized clear phase accounts for 0-100% of the total dealcoholized clear phase by volume percentage.
Optionally, the ethanol concentration of the ethanol concentrated phase is 1.5-30 times of that of the mash.
Optionally, the solid-liquid separation comprises centrifugal separation and membrane separation; the liquid-liquid separation comprises distillation and selective membrane separation.
In a second aspect, the present application further provides a system for producing ethanol by high efficiency gas fermentation, comprising:
the fermentation device is used for fermenting the industrial tail gas to obtain mash;
the thallus separating device is used for carrying out solid-liquid separation on the mash to obtain a mash clear phase and a thallus thick phase, and the thallus separating device is communicated with the fermenting device;
and the ethanol separation device is used for carrying out liquid-liquid separation on the mash clear phase to obtain a dealcoholized clear phase and ethanol, and is respectively communicated with the fermentation device and the thallus separation device and used for returning the dealcoholized clear phase to the mash.
Optionally, a mash inlet of the thallus separating device is communicated with a mash outlet of the fermentation device, a thallus concentrated phase outlet of the thallus separating device is communicated with the fermentation device, a mash clear phase outlet of the thallus separating device is communicated with a mash clear phase inlet of the ethanol separating device, and a dealcoholization clear phase outlet of the ethanol separating device is communicated with the fermentation device.
Optionally, the thallus separation device comprises a centrifugal separation device and a membrane separation device, and the ethanol separation device comprises a distillation device and a selective membrane separation device.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
in the embodiment of the application, the dealcoholized clear phase is separated from mash obtained by fermenting industrial tail gas, and the dealcoholized clear phase is recycled to the fermentation process. When the concentration of the ethanol in the mash is too high, the liquid outlet amount of the mash is increased, namely the liquid outlet amount of the dealcoholized clear phase is increased, and then the dealcoholized clear phase is returned to the mash, namely the concentration of the ethanol in the mash is reduced. By the arrangement, ethanol can be continuously extracted from mash in the process of preparing ethanol by fermentation, so that the concentration of the ethanol is stably controlled, and meanwhile, most of water is recycled to the fermentation along with dealcoholization clean phase, so that the water consumption of unit ethanol is greatly reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a flow chart of a method for producing ethanol by high-efficiency gas fermentation according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a system for producing ethanol by efficient gas fermentation according to an embodiment of the present disclosure.
Reference numerals:
1-fermentation device, 11-mash outlet, 12-nutrient solution inlet, 13-raw gas inlet, 14-fermentation tail gas outlet, 2-thallus separation device, 21-mash inlet, 22-thallus concentrated phase outlet, 23-mash clear phase outlet, 3-ethanol separation device, 31-mash clear phase inlet, 32-dealcoholization clear phase outlet, 33-ethanol concentrated phase outlet and 4-circulating pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the single-stage fermentation process, the ethanol concentration is required to be controlled to keep the continuous operation stability of the thalli, so that the ethanol concentration is lower, the unit ethanol water consumption is higher, the fermentation efficiency is low, and the cost for producing the unit ethanol is high.
In the two-stage fermentation process, the fermentation efficiency is low and the yields of ethanol and mycoprotein are low due to the inhibition of high ethanol concentration on the activity of thalli.
In a first aspect, the present application provides a method for producing ethanol by high efficiency gas fermentation, comprising the steps of:
s1, fermenting the industrial tail gas to obtain mash;
s2, carrying out solid-liquid separation on the mash to obtain a mash clear phase and a thallus thick phase;
in some embodiments, the concentrated phase of the biomass is recycled to the fermentation.
The method comprises the steps of continuously producing mash containing thalli and ethanol in the fermentation process, wherein the mash also comprises water and nutrient substances, when the mash is discharged to a part, all the substances contained in the mash are reduced in equal proportion, the dealcoholized clear phase comprises the nutrient substances and water, and when the dealcoholized clear phase is recycled to fermentation, the nutrient substances and the water in the mash can be further recycled for fermentation, and simultaneously the ethanol concentration in the fermented mash is stabilized.
The embodiment of the application separates mash into a thallus thick phase and a mash clear phase. When the concentration of the thalli in the mash is reduced, the thalli concentrated phase is recycled to the fermentation, so that more thalli are recycled to the fermentation, and the concentration of the thalli in the mash is increased. By the arrangement, the dealcoholization clear phase is recycled when the ethanol concentration in the mash is high, and the thallus concentrated phase is recycled when the thallus concentration is low, so that the ethanol concentration and the thallus concentration in the mash maintain dynamic balance, and the fermentation ethanol preparation process can stably and efficiently run for a long time.
In some embodiments, the dense phase of the bacteria is recycled to the fermentation, and the recycled dense phase of the bacteria accounts for 0-100% of the total dense phase of the bacteria by volume percentage.
In the embodiment of the application, the thallus concentrated phase is further divided, one thallus concentrated phase is discharged to be used for producing thallus protein, and the other thallus concentrated phase is recycled into the mash to adjust the thallus concentration in the mash, so that the adjustment of the quantity of the thallus concentrated phase recycled into the fermentation is more convenient.
In some embodiments, the concentration of the bacteria in the concentrated phase is 1.01 to 10 times the concentration of the bacteria in the mash, such that the concentrated phase of the bacteria is effective to adjust the concentration of the bacteria in the mash without causing excessive fluctuations in the concentration of the bacteria in the mash.
S3, carrying out liquid-liquid separation on the mash clear phase to obtain a dealcoholized clear phase and ethanol, and recycling the dealcoholized clear phase to the fermentation.
In some embodiments, the dealcoholated clarified phase is recycled at a level of from 0% to 100% by volume of the total dealcoholated clarified phase.
In the examples of the present application, the dealcoholized clear phase was further split, wherein one dealcoholized clear phase was discharged and the other dealcoholized clear phase was recycled to the mash to adjust the concentration of ethanol in the mash. Separating clear mash phase, and directly preparing ethanol from ethanol, wherein the dealcoholized clear phase contains water and nutrients required by thallus fermentation. The concentration of the ethanol recycled to the mash is adjusted by controlling the proportion of the recycled dealcoholized clear phase to the total dealcoholized clear phase, so that the concentration of the ethanol in the mash is kept stable.
In some embodiments, the ethanol concentration of the concentrated ethanol phase is 1.5 to 30 times the ethanol concentration of the mash, such that the dealcoholized clear phase is effective in adjusting the ethanol concentration of the mash without causing excessive fluctuations in the ethanol concentration of the mash.
The industrial tail gas is fermented to obtain mash, the mash is subjected to solid-liquid separation to obtain a mash clear phase, the mash clear phase is further subjected to liquid-liquid separation to obtain a dealcoholized clear phase and ethanol, the dealcoholized clear phase is recycled to the fermentation to adjust the concentration of the ethanol in the mash, and the ethanol is output as a product. When the concentration of the ethanol in the mash is too high, the liquid outlet amount of the mash is increased, namely the liquid outlet amount of a clear phase of the mash is increased, the liquid outlet amount of a dealcoholized clear phase is increased, and then the dealcoholized clear phase is recycled into the mash, so that the concentration of the ethanol in the mash can be reduced. So set up for can prevent that ethanol concentration is too high in the fermentation system ethanol process, and then the concentration of stable control ethanol.
In the embodiment of the application, because the nutrient components for fermentation, such as iron ions, magnesium ions, calcium ions, trace elements and the like, in the mash are dissolved in water, the nutrient components enter a clear mash phase along with the water, are separated and then enter a dealcoholized clear phase, and are recycled to the mash along with the dealcoholized clear phase, so that the water consumption and the nutrient consumption of unit ethanol are greatly reduced, and the rear-end sewage treatment load can also be greatly reduced.
In some embodiments, the solid-liquid separation comprises centrifugal separation and membrane separation; the liquid-liquid separation comprises distillation and selective membrane separation.
In the embodiment of the application, the mash is separated by a membrane or by centrifugation to obtain a thallus thick phase and a mash clear phase; during membrane separation, a thallus concentrated phase containing more thallus is filtered by a membrane and then is left on one side of the membrane, and liquid enters the other side of the membrane through the membrane to obtain a mash clear phase; during centrifugal separation, thallus is thrown out through centrifugal force to obtain thallus thick phase, and the residual liquid is thrown out from the other side to obtain mash clear phase.
Separating or distilling the mash clear phase by a selective membrane to obtain ethanol and a dealcoholized clear phase; during selective membrane separation, ethanol and a small amount of water penetrate through the selective membrane and enter one side of the membrane, and most of water, salt ions and the like are remained on the other side of the membrane; during distillation, the ethanol with lower boiling point is distilled out firstly, an ethanol concentrated phase is obtained after collection, and water and nutrient substances dissolved in the water are left in a distillation device to obtain a dealcoholized clear phase.
So set up for mash and clear phase of mash can effectively separate.
The method separates mash into a thallus concentrated phase and a mash clear phase, the thallus concentrated phase is divided at first, one is discharged outside the thallus concentrated phase to produce thallus protein, the other is recycled into the mash to adjust the thallus concentration in the mash, the mash clear phase is separated into an ethanol concentrated phase and a dealcoholization clear phase, the ethanol concentrated phase is purified continuously to prepare ethanol, the dealcoholization clear phase is divided, one is discharged outside the system, and the other is recycled into the mash to adjust water and nutrient substances required by fermentation. By the arrangement, more ethanol concentrated phases are separated when the ethanol concentration in the mash is high, and the ethanol concentrated phases are recycled when the thallus concentration is low, so that the ethanol concentration and the thallus concentration in the mash maintain dynamic balance, and the ethanol preparation process by fermentation can be stably and efficiently operated for a long time.
In a second aspect, the present application further provides a system for producing ethanol by high efficiency gas fermentation, comprising:
the fermentation device 1 is used for fermenting the industrial tail gas to obtain mash;
the thallus separating device 2 is used for carrying out solid-liquid separation on the mash to obtain a mash clear phase and a thallus thick phase, and the thallus separating device 2 is communicated with the fermenting device 1;
and the ethanol separation device 3 is used for carrying out liquid-liquid separation on the clear mash phase to obtain a dealcoholized clear phase and a concentrated ethanol phase, and the ethanol separation device 3 is respectively communicated with the fermentation device 1 and the thallus separation device 2 and is used for recycling the dealcoholized clear phase to the mash.
The thalli is propagated in a fermentation device 1, industrial tail gas is used as a carbon source to produce ethanol, the thalli, nutrient substances required by the growth of the thalli, water and ethanol of a thallus propagation product are mixed together to form mash, the mash firstly enters a thallus separation device 2 along a pipeline, the mash is separated into a mash clear phase and a thallus concentrated phase in the thallus separation device 2, the mash clear phase enters an ethanol separation device 3 and is separated into a dealcoholized clear phase and an ethanol concentrated phase, the dealcoholized clear phase is recycled to the fermentation device 1 to supplement the water and the nutrient substances required by fermentation, and the ethanol concentration of the mash in the fermentation process can be stably controlled by controlling the ethanol extraction amount.
In this application embodiment, fermenting installation 1 with be equipped with circulating pump 4 between the thallus separator 2, through the thallus separator 2 is gone into to the mash pump of circulating pump 4 in with fermenting installation 1, fermenting installation 1 is the fermentation cylinder, is equipped with nutrient solution entry 12 and feed gas entry 13, and the top is equipped with fermentation tail gas outlet 14.
In some embodiments, the mash inlet 21 of the bacteria separation device 2 is communicated with the mash outlet 11 of the fermentation device 1, the dense phase outlet 22 of the bacteria separation device 2 is communicated with the fermentation device 1, the clear phase outlet 23 of the bacteria separation device 2 is communicated with the clear phase inlet 31 of the ethanol separation device 3, and the dealcoholized phase outlet 32 of the ethanol separation device 3 is communicated with the fermentation device 1.
In the embodiment of the application, mash flows out from a mash outlet 11 at the bottom of the fermentation device 1, enters the thallus separation device 2 along a mash inlet 21, is separated into a thallus thick phase and a mash clear phase in the thallus separation device 2, the thallus thick phase is recycled to the fermentation device 1 from a thallus thick phase outlet 22 for adjusting the concentration of thallus in the fermentation device 1, the mash clear phase enters a mash clear phase inlet 31 of the ethanol separation device 3 from a mash clear phase outlet 23, the ethanol separation device 3 removes an ethanol clear phase and ethanol, and the dealcoholized clear phase is recycled to the fermentation device 1 through a dealcoholized clear phase outlet 32 for adjusting the concentration of the mash in the fermentation device 1 and further stably controlling the ethanol concentration of the mash in the fermentation process.
On the basis of the embodiment of the application, the ethanol separation device 3 is further provided with an ethanol concentrated phase outlet 33, ethanol is discharged from the ethanol concentrated phase outlet 33 and enters the ethanol purification process, and the mash outlet 11, the thallus concentrated phase outlet 22, the mash clear phase outlet 23, the dealcoholization clear phase outlet 32 and the ethanol concentrated phase outlet 33 are all provided with control valves so as to control the on-off of each pipeline.
On the basis of the embodiment of the application, the thallus concentrated phase outlet 22 is provided with a three-way pipe for dividing the thallus concentrated phase into two parts. The first end of the three-way pipe is communicated with the thallus separating device 2 and is used for passing through a thallus concentrated phase; the second end of the three-way pipe is communicated with the fermentation device 1 and is used for introducing one strand of thallus concentrated phase into the fermentation device 1, and the second end is provided with a regulating valve and is used for controlling the flow of the thallus concentrated phase recycled to the fermentation device 1; the third end of the three-way pipe is communicated with the mycoprotein preparation system and used for discharging the other stream of the mycoprotein to prepare the mycoprotein, and the third end is provided with a regulating valve used for regulating the flow of the discharged mycoprotein.
On the basis of the embodiment of the application, the dealcoholization clear phase outlet 32 is provided with a three-way pipe for dividing the dealcoholization clear phase into two streams. The first end of the three-way pipe is communicated with the ethanol separation device 3 and is used for cleaning a phase through dealcoholization; the second end of the three-way pipe is communicated with the fermentation device 1 and is used for introducing one strand of dealcoholized clear phase into the fermentation device 1, and the second end is provided with a regulating valve and is used for controlling the flow of the dealcoholized clear phase recycled to the fermentation device 1; the third end of the three-way pipe is used for discharging the other dealcoholized clear phase, and the third end is provided with a regulating valve used for regulating the flow of the discharged dealcoholized clear phase.
In some embodiments, the bacteria separation device 2 comprises a centrifugal separation device and a membrane separation device, and the ethanol separation device 3 comprises a distillation device and a selective membrane separation device.
Example 1:
the nutrient solution flow at the nutrient solution inlet of the fermentation device is 5m3The air input of the raw material gas at the raw material gas inlet is 500Nm3Per, the volume of the fermentation device is 100m3The ethanol concentration in the mash is 30g/L, and the thallus concentration is 20 g/L. The flow rate of mash outlet of the fermentation device is 20m3The mash enters a centrifugal thallus separating device, the clear phase concentration of the mash after concentration and separation is 1g/L, and the flow rate is 16m3H; the concentration of the concentrated phase of the thallus is 100g/L, and the flow rate is 4m3H, wherein 2m3And h, discharging the concentrated phases of the thalli out of the system, and recycling the residual concentrated phases of the thalli to a fermentation device for continuous fermentation. The clear mash phase enters a crude distillation ethanol separation device to obtain 150g/L ethanol with the flow rate of 3m3H, while obtaining a clear phase with an ethanol concentration of 0.5g/L and a flow rate of 13m3And h, recycling all clear phases to a fermentation device for continuous fermentation.
Example 2:
the nutrient solution flow at the nutrient solution inlet of the fermentation device is 8m3H, the air input of the raw gas at the raw gas inlet is 500Nm3Per, the volume of the fermentation device is 100m3The ethanol concentration in the mash is 30g/L, and the thallus concentration is 20 g/L. The flow rate of mash outlet of the fermentation device is 30m3The mash enters a centrifugal thallus separating device, the clear phase concentration of the mash after concentration and separation is 1g/L, and the flow rate is 26m3H; the concentration of the concentrated phase of the thallus is 100g/L, and the flow rate is 4m3H, wherein 2m3And h, discharging the concentrated phases of the thalli out of the system, and recycling the residual concentrated phases of the thalli to a fermentation device for continuous fermentation. The clear mash phase enters an alcohol-permeable membrane separation device to obtain 75g/L ethanol with the flow rate of 6m3H, simultaneously obtaining dealcoholized clear phase with the ethanol concentration of 19.5g/L and the flow rate of 20m3And h, recycling 100% of clear phase to the fermentation device for continuous fermentation.
Example 3:
the nutrient solution flow at the nutrient solution inlet of the fermentation device is 10.6m3The air input of the raw material gas at the raw material gas inlet is 500Nm3Per, the volume of the fermentation device is 100m3The ethanol concentration in the mash is 30g/L, and the thallus concentration is 20 g/L. The flow of mash outlet of the fermentation device is 300m3The mash enters a thallus membrane separation device, and after concentration and separation, the clear phase concentration of the mash is 0g/L, and the flow rate is 30m3H; the concentration of the concentrated phase of the thallus is 22.2g/L, and the flow rate is 270m3H, wherein 9m3And h, discharging the concentrated phases of the thalli out of the system, and recycling the residual concentrated phases of the thalli to a fermentation device for continuous fermentation. The clear mash phase enters a crude distillation ethanol separation device to obtain 150g/L ethanol with the flow rate of 1.6m3H, simultaneously obtaining a clear phase with the ethanol concentration of 1g/L and the flow rate of 28.4m3And h, recycling 100% of clear phase to the fermentation device for continuous fermentation.
Example 4:
the nutrient solution flow at the nutrient solution inlet of the fermentation device is 12.2m3The air input of the raw material gas at the raw material gas inlet is 500Nm3Per, the volume of the fermentation device is 100m3The ethanol concentration in the mash is 30g/L, and the thallus concentration is 20 g/L. The flow of mash outlet of the fermentation device is 300m3The mash enters a thallus membrane separation device, and after concentration and separation, the clear phase concentration of the mash is 0g/L, and the flow rate is 30m3H; the concentration of the concentrated phase of the thallus is 22.2g/L, and the flow rate is 270m3H, wherein 9m3And h, discharging the concentrated phases of the thalli out of the system, and recycling the residual concentrated phases of the thalli to a fermentation device for continuous fermentation. The clear mash phase enters an alcohol permeable membrane separation device to obtain 75g/L ethanol with the flow rate of 3.2m3H, while obtaining a clear phase with an ethanol concentration of 14.5g/L and a flow rate of 26.8m3H, 100% reuse of clear phaseContinuing fermenting in a fermentation device.
Comparative example 1:
adopts single-stage fermentation, and the nutrient solution flow of the fermentation device is 20m3H, the air inflow of the raw material gas of the fermentation device is 400Nm3H, fermentation volume 100m3. The ethanol concentration of the fermented mash is 20g/L, and the thallus concentration is 10 g/L. Simultaneously the fermentation device continuously discharges 20m3The mash per hour.
Comparative example 2
Two-stage fermentation is adopted, and the flow rate of nutrient solution of a first-stage fermentation device is 20m3H, the air inflow of the raw material gas of the fermentation device is 400Nm3H, fermentation volume 100m3. The ethanol concentration of the fermented mash is 20g/L, and the thallus concentration is 10 g/L. Simultaneously the fermentation device continuously discharges 20m3The mash per hour enters a secondary fermentation device. Air inlet 350m of secondary fermentation device3The ethanol concentration is 38g/L, the thallus concentration is 15g/L, and the continuous discharge is 20m3Mash per hour.
The experimental results of examples and comparative examples are shown in table 1.
As shown in table 1, by comparing the ethanol yields of the examples and the comparative examples with the water consumption per ton of ethanol, it can be seen that, compared with the conventional two-stage fermentation, the ethanol production by using the system for preparing ethanol by high-efficiency gas fermentation according to the embodiments of the present application can greatly improve the ethanol yields of unit nutrient solution and raw material gas, and greatly reduce the water consumption per unit ethanol.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for preparing ethanol by high-efficiency gas fermentation is characterized by comprising the following steps:
fermenting the industrial tail gas to obtain mash;
carrying out solid-liquid separation on the mash to obtain a mash clear phase and a thallus thick phase;
carrying out liquid-liquid separation on the mash clear phase to obtain a dealcoholized clear phase and an ethanol concentrated phase;
wherein the dealcoholized clear phase is recycled to the fermentation.
2. The method for producing ethanol by high efficiency gas fermentation of claim 1, wherein the concentrated biomass is recycled to the fermentation.
3. The method for preparing ethanol by high-efficiency gas fermentation according to claim 2, wherein the concentrated phases of the bacteria are recycled to the fermentation according to volume percentage, and the recycled concentrated phases of the bacteria account for 0-100% of the total concentrated phases of the bacteria.
4. The method for producing ethanol by high efficiency gas fermentation according to claim 2, wherein the concentration of the bacteria in the bacteria concentrated phase is 1.01 to 10 times of the concentration of the bacteria in the mash.
5. The method for producing ethanol by high-efficiency gas fermentation according to claim 1, wherein the recovered dealcoholized clear phase accounts for 0-100% of the total dealcoholized clear phase by volume percentage.
6. The method for producing ethanol by high efficiency gas fermentation of claim 1, wherein the ethanol concentration of the ethanol concentrated phase is 1.5 to 30 times of the ethanol concentration of the mash clear phase.
7. The method for producing ethanol by high-efficiency gas fermentation according to claim 1, wherein the solid-liquid separation comprises centrifugal separation and membrane separation; the liquid-liquid separation comprises distillation and selective membrane separation.
8. A system for preparing ethanol by high-efficiency gas fermentation is characterized by comprising:
the fermentation device (1) is used for fermenting the industrial tail gas to obtain mash;
the thallus separating device (2) is used for carrying out solid-liquid separation on the mash to obtain a clear mash phase and a thick thallus phase, and the thallus separating device (2) is communicated with the fermenting device (1);
the ethanol separation device (3) is used for carrying out liquid-liquid separation on the clear mash phase to obtain a dealcoholized clear phase and a concentrated ethanol phase, and the ethanol separation device (3) is respectively communicated with the fermentation device (1) and the thallus separation device (2) and is used for returning the dealcoholized clear phase to the mash.
9. The system for preparing ethanol by high-efficiency gas fermentation according to claim 8, wherein a mash inlet (21) of the thallus separating device (2) is communicated with a mash outlet (11) of the fermentation device (1), a thallus thick phase outlet (22) of the thallus separating device (2) is communicated with the fermentation device (1), a mash clear phase outlet (23) of the thallus separating device (2) is communicated with a mash clear phase inlet (31) of the ethanol separating device (3), and a dealcoholized clear phase outlet (32) of the ethanol separating device (3) is communicated with the fermentation device (1).
10. The system for preparing ethanol through high-efficiency gas fermentation according to claim 8, wherein the thallus separation device (2) comprises a centrifugal separation device and a membrane separation device, and the ethanol separation device (3) comprises a distillation device and a selective membrane separation device.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071152A (en) * | 2010-11-09 | 2011-05-25 | 诸城东晓生物科技有限公司 | Method for recovering yeast in fermented erythritol liquor |
| JP2014183780A (en) * | 2013-03-22 | 2014-10-02 | Mitsui Eng & Shipbuild Co Ltd | Ethanol production system |
| CN105385713A (en) * | 2015-07-10 | 2016-03-09 | 山东省食品发酵工业研究设计院 | Sodium gluconate fermentation method based on cyclic thallus utilization |
| CN113648821A (en) * | 2021-08-13 | 2021-11-16 | 宁夏首朗吉元新能源科技有限公司 | Treatment method and treatment system for ferroalloy tail gas |
-
2022
- 2022-01-25 CN CN202210085353.0A patent/CN114438136A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071152A (en) * | 2010-11-09 | 2011-05-25 | 诸城东晓生物科技有限公司 | Method for recovering yeast in fermented erythritol liquor |
| JP2014183780A (en) * | 2013-03-22 | 2014-10-02 | Mitsui Eng & Shipbuild Co Ltd | Ethanol production system |
| CN105385713A (en) * | 2015-07-10 | 2016-03-09 | 山东省食品发酵工业研究设计院 | Sodium gluconate fermentation method based on cyclic thallus utilization |
| CN113648821A (en) * | 2021-08-13 | 2021-11-16 | 宁夏首朗吉元新能源科技有限公司 | Treatment method and treatment system for ferroalloy tail gas |
Non-Patent Citations (2)
| Title |
|---|
| 莫志鹏: "钢铁工业煤气生物发酵法制燃料乙醇技术及其工业化应用", 《2020年全国冶金能源环保技术交流会会议文集 中国金属学会》, 18 November 2020 (2020-11-18), pages 317 - 321 * |
| 陆新红: "菌体回用连续发酵生产谷氨酸", 《发酵科技通讯》, no. 04, 30 December 1988 (1988-12-30), pages 39 - 42 * |
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