CN112079419A - Method for recovering molasses alcohol wastewater - Google Patents
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- CN112079419A CN112079419A CN202010776453.9A CN202010776453A CN112079419A CN 112079419 A CN112079419 A CN 112079419A CN 202010776453 A CN202010776453 A CN 202010776453A CN 112079419 A CN112079419 A CN 112079419A
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 239000002351 wastewater Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000000126 substance Substances 0.000 claims abstract description 42
- 238000001035 drying Methods 0.000 claims abstract description 20
- 238000000909 electrodialysis Methods 0.000 claims abstract description 17
- 238000002425 crystallisation Methods 0.000 claims abstract description 7
- 230000008025 crystallization Effects 0.000 claims abstract description 7
- 230000008014 freezing Effects 0.000 claims abstract description 6
- 238000007710 freezing Methods 0.000 claims abstract description 6
- 238000004821 distillation Methods 0.000 claims abstract description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 66
- 239000012528 membrane Substances 0.000 claims description 18
- 239000002244 precipitate Substances 0.000 claims description 15
- 150000001720 carbohydrates Chemical class 0.000 claims description 10
- 239000000469 ethanolic extract Substances 0.000 claims description 7
- 239000005416 organic matter Substances 0.000 claims description 7
- 238000005341 cation exchange Methods 0.000 claims description 6
- 150000001450 anions Chemical class 0.000 claims description 4
- 150000001768 cations Chemical class 0.000 claims description 4
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 4
- 238000004064 recycling Methods 0.000 abstract description 4
- 238000000605 extraction Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000003810 ethyl acetate extraction Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 40
- 238000011084 recovery Methods 0.000 description 8
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 7
- 239000011591 potassium Substances 0.000 description 7
- 229910052700 potassium Inorganic materials 0.000 description 7
- 150000008442 polyphenolic compounds Chemical class 0.000 description 5
- 235000013824 polyphenols Nutrition 0.000 description 5
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- 238000004737 colorimetric analysis Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 229930003935 flavonoid Natural products 0.000 description 3
- 150000002215 flavonoids Chemical class 0.000 description 3
- 235000017173 flavonoids Nutrition 0.000 description 3
- 150000007524 organic acids Chemical class 0.000 description 3
- 235000011164 potassium chloride Nutrition 0.000 description 3
- 239000001103 potassium chloride Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 150000001413 amino acids Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000002481 ethanol extraction Methods 0.000 description 2
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910017053 inorganic salt Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- 239000003895 organic fertilizer Substances 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000012086 standard solution Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- JMGZEFIQIZZSBH-UHFFFAOYSA-N Bioquercetin Natural products CC1OC(OCC(O)C2OC(OC3=C(Oc4cc(O)cc(O)c4C3=O)c5ccc(O)c(O)c5)C(O)C2O)C(O)C(O)C1O JMGZEFIQIZZSBH-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- GAMYVSCDDLXAQW-AOIWZFSPSA-N Thermopsosid Natural products O(C)c1c(O)ccc(C=2Oc3c(c(O)cc(O[C@H]4[C@H](O)[C@@H](O)[C@H](O)[C@H](CO)O4)c3)C(=O)C=2)c1 GAMYVSCDDLXAQW-AOIWZFSPSA-N 0.000 description 1
- RJGDLRCDCYRQOQ-UHFFFAOYSA-N anthrone Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3CC2=C1 RJGDLRCDCYRQOQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 235000014633 carbohydrates Nutrition 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- IVTMALDHFAHOGL-UHFFFAOYSA-N eriodictyol 7-O-rutinoside Natural products OC1C(O)C(O)C(C)OC1OCC1C(O)C(O)C(O)C(OC=2C=C3C(C(C(O)=C(O3)C=3C=C(O)C(O)=CC=3)=O)=C(O)C=2)O1 IVTMALDHFAHOGL-UHFFFAOYSA-N 0.000 description 1
- 230000004720 fertilization Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 229930003944 flavone Natural products 0.000 description 1
- 150000002212 flavone derivatives Chemical class 0.000 description 1
- 235000011949 flavones Nutrition 0.000 description 1
- 235000004515 gallic acid Nutrition 0.000 description 1
- 229940074391 gallic acid Drugs 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000013379 molasses Nutrition 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000000243 photosynthetic effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- -1 potassium tetraphenylborate Chemical compound 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 235000018102 proteins Nutrition 0.000 description 1
- FDRQPMVGJOQVTL-UHFFFAOYSA-N quercetin rutinoside Natural products OC1C(O)C(O)C(CO)OC1OCC1C(O)C(O)C(O)C(OC=2C(C3=C(O)C=C(O)C=C3OC=2C=2C=C(O)C(O)=CC=2)=O)O1 FDRQPMVGJOQVTL-UHFFFAOYSA-N 0.000 description 1
- IKGXIBQEEMLURG-BKUODXTLSA-N rutin Chemical compound O[C@H]1[C@H](O)[C@@H](O)[C@H](C)O[C@@H]1OC[C@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](OC=2C(C3=C(O)C=C(O)C=C3OC=2C=2C=C(O)C(O)=CC=2)=O)O1 IKGXIBQEEMLURG-BKUODXTLSA-N 0.000 description 1
- ALABRVAAKCSLSC-UHFFFAOYSA-N rutin Natural products CC1OC(OCC2OC(O)C(O)C(O)C2O)C(O)C(O)C1OC3=C(Oc4cc(O)cc(O)c4C3=O)c5ccc(O)c(O)c5 ALABRVAAKCSLSC-UHFFFAOYSA-N 0.000 description 1
- 235000005493 rutin Nutrition 0.000 description 1
- 229960004555 rutoside Drugs 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- VHBFFQKBGNRLFZ-UHFFFAOYSA-N vitamin p Natural products O1C2=CC=CC=C2C(=O)C=C1C1=CC=CC=C1 VHBFFQKBGNRLFZ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- JLYXXMFPNIAWKQ-UHFFFAOYSA-N γ Benzene hexachloride Chemical compound ClC1C(Cl)C(Cl)C(Cl)C(Cl)C1Cl JLYXXMFPNIAWKQ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/06—Preparation by working up brines; seawater or spent lyes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Analytical Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Physical Water Treatments (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a method for recovering molasses alcohol wastewater, which mainly comprises the processes of electrodialysis, ethanol solution extraction, reduced pressure distillation concentration, ethyl acetate extraction, freezing crystallization, drying and the like. The process of the invention fully considers the recycling of substances while achieving the zero discharge of the molasses alcohol wastewater, and obtains a high-purity product with low energy consumption and high efficiency.
Description
Technical Field
The invention belongs to the technical field of industrial wastewater recovery, and particularly relates to a method for recovering molasses alcohol wastewater.
Background
The molasses alcohol wastewater is wastewater generated in the process of producing alcohol by using molasses, has high organic matter content, COD concentration of about 10000-.
At present, the main treatment method of molasses alcohol wastewater comprises the following steps: anaerobic and aerobic sewage treatment, direct combustion, fertilizer preparation by photosynthetic bacteria, spray drying after concentration and the like. Most of the methods utilize chemical means, consume a large amount of energy to treat or burn the wastewater into carbon dioxide and the like to be discharged, and cannot recycle organic matters in the wastewater. Although part of the treatment method can be used after being concentrated, dried or fermented into organic fertilizer, the organic fertilizer also consumes a large amount of energy and simultaneously generates secondary pollutants, and the direct fertilization causes the problem of soil hardening.
The organic substances in the wastewater mainly comprise substances such as saccharides, proteins, organic acids, polyphenols and the like, and in addition, a large amount of inorganic salts such as potassium, calcium and the like are contained, so that the components are complex, and a single treatment method cannot be used. In addition, the existing recycling treatment means are simple concentration and drying and the like, and the product contains a large amount of impurities and mixtures, so that the product has low purity and a large amount of impurities and cannot be reasonably utilized.
Disclosure of Invention
The invention aims to provide a recovery method capable of simultaneously extracting organic matters and inorganic matters in molasses alcohol wastewater.
The technical scheme adopted by the invention is as follows:
a method for recovering molasses alcohol wastewater comprises the following steps:
(1) performing electrodialysis treatment on the molasses alcohol wastewater to obtain an inorganic substance concentrated solution and an organic substance concentrated solution, and drying the inorganic substance concentrated solution to obtain potassium salt;
(2) extracting the organic matter concentrated solution with ethanol solution to obtain ethanol extractive solution and precipitate, and drying the precipitate to obtain saccharide;
(3) distilling the ethanol extract under reduced pressure to obtain distillate, and recovering ethanol solution;
(4) extracting the distillate with ethyl acetate to obtain ethyl acetate layer and residual solution, and drying the residual solution to obtain organic powdery substance;
(5) the ethyl acetate layer was frozen and crystallized to obtain a crystalline substance, and ethyl acetate was recovered.
In the recovery method, in the step (1), after the inorganic substance concentrated solution is dried, the purity of the obtained potassium salt can reach more than 90 percent, and the main components are potassium chloride and potassium sulfate.
Preferably, the electrodialysis membrane in step (1) is an anion-cation exchange membrane, and the anion-cation exchange membrane is an anion membrane and a cation membrane which are arranged alternately.
Preferably, the voltage of the electrodialysis in the step (1) is 15V-25V, and the treatment time of the electrodialysis is 0.5 h-2 h.
Preferably, the volume concentration of the ethanol solution in the step (2) is 75-100%.
Preferably, the volume ratio of the ethanol solution to the organic matter concentrated solution in the step (2) is 1 (1-2). The organic concentrated solution is precipitated by the action of ethanol to obtain saccharides and proteins, and organic acids, phenols, amino acids, etc. are dissolved in ethanol. The total sugar concentration of the saccharide substance obtained by drying the precipitate can reach more than 60 percent.
Preferably, the temperature of reduced pressure distillation in the step (3) is 45-65 ℃, and the pressure is 0.08-0.12 MPa.
Preferably, the volume ratio of the ethyl acetate to the distillate in the step (4) is 1: 1-1.5. The organic powder obtained after drying the residual solution contains polyphenol, organic acid, amino acid, etc.
Preferably, the temperature of the frozen crystals in the step (5) is-10 ℃ to 0 ℃.
Preferably, the crystallization time of the freezing crystallization in the step (5) is 1h to 12 h. The frozen and crystallized material is organic extract rich in total flavone.
The invention has the beneficial effects that:
1. the recovery method of the invention can fully consider the characteristics of the molasses alcohol wastewater, and extracts and purifies various substances in the wastewater step by step in a classified manner, so that high-purity potassium salt, carbohydrate, organic extract and the like which can be directly utilized are finally obtained, and the product can be applied to different industries and fields.
2. The recovery method is a low-energy-consumption resource treatment method, and the related process fully considers the recycling and recovery of the substances, so that the utilization rate of the substances is saved to the maximum extent, and the zero emission of the alcohol wastewater is achieved.
3. The recovery method of the invention fully utilizes the useful and extractable substances in the molasses alcohol wastewater, and is a water treatment method for recycling.
Drawings
FIG. 1 is a process diagram for recovering molasses alcohol wastewater according to the present invention.
Detailed Description
In order to make the objects, technical solutions and technical effects of the present invention more clear, the present invention will be described in further detail with reference to specific embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1: a method for recovering molasses alcohol wastewater comprises the following steps:
(1) performing electrodialysis treatment on the molasses alcohol wastewater, wherein the electrodialysis membrane is an anion-cation exchange membrane which is formed by arranging an anion membrane and a cation membrane in pairs, the voltage of the electrodialysis is 25V, the treatment time is 1h, an inorganic substance concentrated solution and an organic substance concentrated solution are obtained, and the inorganic substance concentrated solution is dried to obtain sylvite;
(2) adding 85% ethanol solution with the same volume as the organic matter concentrated solution, extracting to obtain ethanol extract and precipitate, and drying the precipitate to obtain saccharide;
(3) distilling the ethanol extractive solution at 58 deg.C under 0.08MPa under reduced pressure to obtain distillate, and recovering ethanol solution;
(4) extracting the distillate with equal volume of ethyl acetate to obtain ethyl acetate layer and residual solution, and drying the residual solution to obtain organic powdery substance;
(5) freezing and crystallizing the ethyl acetate layer at-5 deg.C for 5 hr to obtain crystalline substance, and recovering ethyl acetate.
Example 2: a method for recovering molasses alcohol wastewater comprises the following steps:
(1) performing electrodialysis treatment on the molasses alcohol wastewater, wherein the electrodialysis membrane is an anion-cation exchange membrane which is formed by arranging an anion membrane and a cation membrane in pairs, the voltage of the electrodialysis is 18V, the treatment time is 2h, an inorganic substance concentrated solution and an organic substance concentrated solution are obtained, and the inorganic substance concentrated solution is dried to obtain sylvite;
(2) adding 0.5 volume times of 75% ethanol solution into the organic matter concentrated solution for extraction to obtain ethanol extract and precipitate, and drying the precipitate to obtain saccharide;
(3) distilling the ethanol extractive solution at 65 deg.C under 0.1Pa under reduced pressure to obtain distillate, and recovering ethanol solution;
(4) extracting the distillate with 1.5 times volume of ethyl acetate to obtain ethyl acetate layer and residual solution, and drying the residual solution to obtain organic powdery substance;
(5) the ethyl acetate layer was subjected to freeze crystallization at 0 ℃ for 12 hours to obtain a crystalline substance, and ethyl acetate was recovered.
Comparative example 1: a method for recovering molasses alcohol wastewater comprises the following steps:
(1) adding the molasses alcohol wastewater into 85% ethanol solution with the same volume and volume concentration for extraction to obtain ethanol extract and precipitate, and drying the precipitate to obtain saccharide;
(2) distilling the ethanol extractive solution at 58 deg.C under 0.1MPa under reduced pressure to obtain distillate, and recovering ethanol solution;
(3) extracting the distillate with equal volume of ethyl acetate to obtain ethyl acetate layer and residual solution, and drying the residual solution to obtain organic powdery substance;
(4) freezing and crystallizing the ethyl acetate layer at-5 deg.C for 5 hr to obtain crystalline substance, and recovering ethyl acetate.
Test example: the test method of each component is as follows: the potassium content is measured by adopting a potassium tetraphenylborate gravimetric method, the saccharides are measured by adopting an anthrone colorimetric method, the flavonoids are measured by adopting a rutin standard solution as a reference colorimetric method, and the polyphenols are measured by adopting a gallic acid colorimetric method by adopting forlin phenol as a standard solution.
Before the recovery begins, the molasses alcohol wastewater is subjected to chromatographic analysis and chemical detection, and the results are shown in Table 1:
TABLE 1 initial content of components and pH (mass fraction,%) of molasses alcohol wastewater
The results of the measurement of the substances separated in the respective steps of example 1 were: the content of potassium after electrodialysis in the step (1) is 90 percent; after the ethanol extraction in the step (2), drying the precipitate to obtain 68% of total sugar and 31% of inorganic salt; the polyphenol content in the organic powdery substance obtained after drying the residual liquid in the step (4) is 52 percent; the content of total flavonoids in the frozen crystalline substance obtained in the step (5) is 85%.
The substance obtained after separation in the steps of example 2 was measured, and the results were: the content of potassium after electrodialysis in the step (1) is 85 percent; after the ethanol extraction in the step (2), drying the precipitate to obtain 70% of total sugar and 28% of inorganic salt; drying the residual liquid in the step (4) to obtain an organic powdery substance with polyphenol content of 60%; the content of total flavonoids in the frozen crystalline substance obtained in the step (5) is 82%.
The results of measurement of the substances separated in the respective steps of comparative example 1 were: in the step (1), the molasses alcohol wastewater is directly extracted by adopting an ethanol solution, the extracted ethanol extract and the precipitate both contain potassium, the potassium content in the ethanol extract is 4 times of that in the precipitate, substances extracted in the subsequent process are influenced to contain a large amount of potassium, the contents of inorganic salts and ash content are high, and the purity of the substances is greatly reduced.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (9)
1. A method for recovering molasses alcohol wastewater is characterized by comprising the following steps: the method comprises the following steps:
(1) performing electrodialysis treatment on the molasses alcohol wastewater to obtain an inorganic substance concentrated solution and an organic substance concentrated solution, and drying the inorganic substance concentrated solution to obtain potassium salt;
(2) extracting the organic matter concentrated solution with ethanol solution to obtain ethanol extractive solution and precipitate, and drying the precipitate to obtain saccharide;
(3) distilling the ethanol extract under reduced pressure to obtain distillate, and recovering ethanol solution;
(4) extracting the distillate with ethyl acetate to obtain ethyl acetate layer and residual solution, and drying the residual solution to obtain organic powdery substance;
(5) the ethyl acetate layer was frozen and crystallized to obtain a crystalline substance, and ethyl acetate was recovered.
2. The method for recovering molasses alcohol wastewater according to claim 1, characterized in that: the membrane subjected to electrodialysis treatment in the step (1) is an anion-cation exchange membrane, and the anion-cation exchange membrane is formed by alternately arranging an anion membrane and a cation membrane.
3. The method for recovering molasses alcohol wastewater according to claim 1, characterized in that: the voltage of the electrodialysis treatment in the step (1) is 15V-25V, and the time of the electrodialysis treatment is 0.5 h-2 h.
4. The method for recovering molasses alcohol wastewater according to claim 1, characterized in that: the volume concentration of the ethanol solution in the step (2) is 75-100%.
5. The method for recovering molasses alcohol wastewater according to claim 1, characterized in that: the volume ratio of the ethanol solution to the organic matter concentrated solution in the step (2) is 1 (1-2).
6. The method for recovering molasses alcohol wastewater according to claim 1, characterized in that: the temperature of the reduced pressure distillation in the step (3) is 45-65 ℃, and the pressure is 0.08-0.12 MPa.
7. The method for recovering molasses alcohol wastewater according to claim 1, characterized in that: in the step (4), the volume ratio of the ethyl acetate to the distillate is 1: 1-1.5.
8. The method for recovering molasses alcohol wastewater according to claim 1, characterized in that: the temperature of the freezing crystallization in the step (5) is-10 ℃ to 0 ℃.
9. The method for recovering molasses alcohol wastewater according to claim 1, characterized in that: the crystallization time of the freezing crystallization in the step (5) is 1-12 h.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111989306A (en) * | 2017-11-30 | 2020-11-24 | 阿夫依朗公司 | Process for the value-addition of potassium salts co-produced in a fermentation process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1509987A (en) * | 2002-12-24 | 2004-07-07 | 桂林矿产地质研究院 | Production of potassium containing chemical products from waste liquid of molasses alcohol production |
| CN1562796A (en) * | 2004-03-27 | 2005-01-12 | 广西大学 | Method for cleansing and reclaiming waste fluid of alcohol made from molasses |
| CN101346475A (en) * | 2005-12-21 | 2009-01-14 | 丹尼斯克制糖公司 | Process for the recovery of sucrose and/or non-sucrose components |
| CN101628070A (en) * | 2009-08-04 | 2010-01-20 | 江苏省中国科学院植物研究所 | Chinese yam polysaccharides extract and preparation method and application thereof |
| EP2998277A1 (en) * | 2014-09-19 | 2016-03-23 | Syngen S.r.l. | Method for treating biological materials associated with the wastewater purification cycle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1509987A (en) * | 2002-12-24 | 2004-07-07 | 桂林矿产地质研究院 | Production of potassium containing chemical products from waste liquid of molasses alcohol production |
| CN1562796A (en) * | 2004-03-27 | 2005-01-12 | 广西大学 | Method for cleansing and reclaiming waste fluid of alcohol made from molasses |
| CN101346475A (en) * | 2005-12-21 | 2009-01-14 | 丹尼斯克制糖公司 | Process for the recovery of sucrose and/or non-sucrose components |
| CN101628070A (en) * | 2009-08-04 | 2010-01-20 | 江苏省中国科学院植物研究所 | Chinese yam polysaccharides extract and preparation method and application thereof |
| EP2998277A1 (en) * | 2014-09-19 | 2016-03-23 | Syngen S.r.l. | Method for treating biological materials associated with the wastewater purification cycle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111989306A (en) * | 2017-11-30 | 2020-11-24 | 阿夫依朗公司 | Process for the value-addition of potassium salts co-produced in a fermentation process |
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