CN102296092B - Pretreatment method for sugarcane juice alcoholic fermentation broth and extraction method for high value products in waste liquid - Google Patents
Pretreatment method for sugarcane juice alcoholic fermentation broth and extraction method for high value products in waste liquid Download PDFInfo
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- Y02E50/10—Biofuels, e.g. bio-diesel
Abstract
The invention discloses a pretreatment method for sugarcane juice alcoholic fermentation broth and an extraction method for high value products in waste liquid. The pretreatment method comprises the following steps: (1) adding ultrafine particles during sugarcane juice alcoholic fermentation, after fermentation, adjusting the pH value of obtained fermentation broth, carrying out solid-liquid separation, recovering the solid, and using the liquid for extraction of alcohol; (2) adjusting the pH value of obtained alcohol waste liquid after extraction of alcohol, carrying out solid-liquid separation, recovering the solid, using the liquid for further extraction of high value pigments. Obtained waste liquid after extraction of pigments is colorless or in light color and can be used as osmosis water for extraction of sucrose content by squeezing sugarcanes or can be discharged after further simple biochemical treatment. The methods provided in the invention enable alcoholic fermentation efficiency and the effect of clarification to be improved, difficulty of aftertreatment of alcohol waste water to be reduced and a great amount of products with high added values to be recovered, and is of positive significance to improvement of integral economic benefits of sugarcane-energized alcohol and environmental protection.
Description
Technical field
The present invention relates to a kind of pretreatment process of sugarcane sugarcane juice alcohol fermentation liquid, and the extracting method of the high value of sugarcane sugarcane juice alcoholic fermentation waste liquor product.
Background technology
Sugarcane is one of most important raw material of development energy ethanol.In the production of sugarcane ethanol processed, the sugarcane sugarcane juice obtains through refining by fermentation the waste liquid that stays after ethanol and stays in containing fermenting process part yeast thalline remains and some soluble nutrients, also kept original various inorganicss in the sugarcane juice, organism and a large amount of coloring matter etc.In the method that molasses alcohol waste liquid is in the past processed, people generally only are careful basal component and the characteristic of obtaining through refining the waste liquid that stays after ethanol, and have ignored the source of these basal component and changed and even on the impact of final liquid waste disposal at fermenting process and still-process.For example the sugarcane juice of sugarcane gained after squeezing contains a large amount of starch, fat, and protein, colloid, fiber and yeast etc., the physical and chemical performance of these materials is subjected to the impact of temperature quite large.Gelatinization, gel in various degree can occur and make the liquid waste disposal of postorder become more difficult after pyrogenic distillation in the sugarcane juice alcohol fermentation liquid.If the sugarcane juice alcohol fermentation liquid is carried out clarifying treatment before distillation, starch with the overwhelming majority, fat, protein, colloid, primitive fibers etc. are separated, clear liquid distills, so both alleviate the aftertreatment burden of alcohol slops, strengthened the heat and mass effect in the alcohol still-process, improved the distilling effect of alcohol; Can reclaim again the material such as starch, fat, protein, yeast of high nutritive value.Improve the overall value of alcohol slops, reduced treatment cost of waste liquor.
In addition, not only rich in proteins, starch in the sugarcane juice fermented waste fluid, and contain 0.17% pair of high anti-oxidation actives that human body is useful, as polyphenolic compound (natural pigment) etc.If can extract the composition (comprising pigment) with high value from sugarcane sugarcane juice fermentation alcohol waste liquid, this both had been conducive to reduce the difficulty of alcohol slops aftertreatment, had reclaimed again a large amount of high added value products.
Domestic and international aspect the method for waste liquid of molasses alcohol at present, mainly contain agriculture and fill with method, concentration method, anaerobic-aerobic method, effective microorganism technology etc.From utilization of resources aspect, governance process is mainly for the production of yeast, composite fertilizer, and sylvite processed is made fish meal, and anaerobism is produced biogas etc.Almost pigment is not reclaimed in these improvement methods, and the amount of pigment in alcohol slops is greatly difficult point and the key of this treating waste liquid.Because the pigment in waste liquid has anti-vapour, heat-resisting, resistance to oxidation, difficultly decomposed by microorganism, place for a long time the characteristics such as colour-fast, so the color in alcohol slops to administer be the common technology difficult problem that the Production of Fuel Ethanol process exists.It is calculated that 1 ton of alcohol of every product approximately produces the waste liquid of 12 tons～13 tons, measure very large, if directly the discharging with serious environment pollution.Therefore, how to improve the comprehensive utilization value of sugarcane juice alcohol slops, eliminating or alleviating it is one of important gordian technique of development energy ethanol to the pollution of environment etc.Brazil is the most ripe country of development sugarcane fuel alcohol, and the waste liquid of its alcohol production process is mainly used in field irrigation.Because sugar cane juice preparing alcohol waste liquid is simple with respect to the molasses alcohol waste liquid composition, concentration is lower, the hammer degree is estimated approximately approximately 10 ° of BX of 2 ~ 3 ° of BX(molasses alcohol waste liquids), as irrigation, other is actually uneconomic through concentration and recovery heat (calorific value is low) or the approach of doing composite fertilizer except directly.Fill with as the employing agriculture restriction that method is subject to edaphic condition too in China.Therefore seeking a kind of processing method of suitable sugarcane juice alcohol slops and be based on the utilization of resources and cleaner production, is the matter of utmost importance of sugarcane Production of Fuel Ethanol.
Summary of the invention
For an existing difficult problem in prior art, the invention provides a kind of pretreatment process of sugarcane sugarcane juice alcohol fermentation liquid and the extracting method of the high value product of waste liquid.
The inventive method adopts a kind of special pretreatment process according to the composition characteristic of sugarcane sugarcane juice in the sugarcane alcoholic fermentation process, both reclaimed the materials such as starch, fat, protein, yeast of high nutritive value, extracted for rear operation the material that natural pigment provides low impurity again.
The inventive method adopts the strong ion-exchange fiber of a kind of contamination resistance to carry out the recovery pigment technique of essence decolouring with polymeric adsorbent as slightly taking off look ﹑ according to the composition characteristic of sugarcane juice alcohol slops, both reclaimed the natural pigment of high value, make again the colour of waste liquid reach emission standard, reached resource and taken full advantage of purpose with cleaner production.
For reaching above-mentioned technique effect, the technical solution adopted in the present invention is as follows:
The pretreatment process of sugarcane sugarcane juice alcohol fermentation liquid comprises the steps:
(1) when the sugarcane juice zymamsis, add 200～400 purpose ultra-fine grains, the pH to 7.0 of the complete rear adjusting fermented liquid that ferments～7.5, solid-liquid separation, solid reclaims, and liquid is used for extracting alcohol;
(2) pH to 7.5 of the alcohol slops after adjusting extraction alcohol～8.5, solid-liquid separation, solid reclaims, and liquid is further processed.
Preferably, described ultra-fine grain is at least a in quartz sand, diatomite, perlite powder.
Preferably, the addition of described ultra-fine grain is the 100-500mg/L sugarcane juice.
The extracting method of the high value of sugarcane sugarcane juice alcoholic fermentation waste liquor product comprises that the liquid that step (2) solid-liquid separation in above-mentioned sugarcane sugarcane juice alcohol fermentation liquor pretreatment method is obtained decolours, and extracts pigment.
The extracting method of the high value of above-mentioned sugarcane sugarcane juice alcoholic fermentation waste liquor product comprises the steps:
(1) liquid that step (2) solid-liquid separation in above-mentioned sugarcane sugarcane juice alcohol fermentation liquor pretreatment method is obtained slightly decolours by the ion-exchange fiber post;
(2) solution after step (1) decolouring is carried out the essence decolouring after adsorption resin column;
(3) with regenerated liquid, the ion-exchange fiber post of step (1) is carried out wash-out, collect regenerated liquid;
(4) with elutriant, the adsorption resin column of step (2) is carried out wash-out, collect elutriant;
(5) regenerated liquid of step (3), (4) being collected and elutriant concentrate respectively and obtain pigment.
Preferably, described ion-exchange fiber post is the strongly basic anion ion exchange fibre post.
Preferably, described adsorption resin column is macroporous adsorptive resins.
Preferably, described regenerated liquid is the NaCl solution of 2.5%-15% massfraction, and the pH value is 7.0-14.0.
Preferably, described elutriant is the ethanol of 20%-100% volume fraction.
The present invention has following beneficial effect:
1) the inventive method, added during the fermentation porous superfine powder, both given full play to that porous ultrafine particle is dispersed strong, specific surface area is large, a large amount of yeast thalline are adhered to, improve the effect of zymamsis efficient, brought into play again simultaneously the superfine powder particle in fermented liquid clarification precipitation process as the effect of throw out nucleus, accelerate the settling velocity of throw out, improved the effect of clarification.
2) the inventive method is according to the physicochemical property of non-wine part material in the sugarcane juice alcohol fermentation liquid, before steaming wine, sugarcane juice fermenting-ripening liquid is clarified pre-treatment, its maximum benefit is: 1. avoid distillation plant incrustation, improve the heat and mass effect of steaming wine, improve the alcohol distillation efficient of distillation plant; 2. avoid protein, starch, fat wait the load of operation Slops treatment after sex change causes increasing in still-process.
3) the inventive method adopts the strong ion-exchange fiber of contamination resistance as thick decolouring according to the composition characteristic of sugarcane juice alcohol slops, carry out the essence decolouring with polymeric adsorbent and reclaim the pigment thing with different anti-oxidant activity characteristics, alcohol slops after treatment is colourless, can be used as the infiltration water of cane milling extracting Sucrose or further simply discharges after biochemical treatment.This treatment process both had been conducive to reduce the difficulty of alcohol slops aftertreatment, had reclaimed again a large amount of high added value products, and this has positive meaning for the whole economic efficiency that improves the sugarcane energy ethanol.
Embodiment
The inventive method is according to the composition characteristic of sugarcane sugarcane juice, add ultra-fine grain in the sugarcane alcoholic fermentation process, the pH to 7.0 of complete rear adjusting fermented liquid～7.5 of fermenting, solid-liquid separation, solid is mainly the high nutritive value materials such as protein contained in the sugarcane fermented liquid, starch, fat, yeast, reclaim, liquid is clear fermented liquid, is used for extracting alcohol.
Again regulate to extract the pH to 7.5 of the alcohol slops after alcohol～8.5, solid-liquid separation, solid reclaims, liquid is used for further decolouring, and the pigment of recovery high value, it is colourless or light that liquid after decolouring is, and colour reaches emission standard, can be used as the infiltration water of cane milling extracting Sucrose or further simply discharge after biochemical treatment.
Embodiment 1
Get sugarcane sugarcane juice 500ml, add 300 order diatomite, addition is 50mg, by alcohol fermentation operation rules carry out disinfection, the operations such as inoculation, shaking flask, ferment and finish fermentation after 50 hours.Add 10% sodium hydroxide solution adjust pH to 7.5 to fermented liquid, stir fully, standing, solid-liquid separation is precipitated thing and clear fermented liquid.Reclaim throw out I (dry weight is 0.023%), clear fermented liquid is used for distilled spirit, and (the COD value is 1.56 * 10 to obtain alcohol (the wine number of degrees are 6.64) and alcohol slops
4Mg/L).
Get above-mentioned alcohol slops, regulate pH value to 8.0 with 10% sodium hydroxide solution, stir fully, standing, solid-liquid separation, (the COD value is 0.56 * 10 to be precipitated thing (dry weight is 0.008%) and alcohol slops clear liquid
4Mg/L).Reclaim the throw out II.The alcohol slops clear liquid further decolours, and reclaims pigment.
Embodiment 2
Get sugarcane sugarcane juice 500ml, add 300 order diatomite, addition is 80mg, by alcohol fermentation operation rules carry out disinfection, the operations such as inoculation, shaking flask, ferment and finish fermentation after 50 hours.The lime slurry adjust pH to 7.0 that adds 10Be to fermented liquid stirs fully, and is standing, and solid-liquid separation is precipitated thing and clear fermented liquid.Reclaim throw out I (dry weight is 0.024%), clear fermented liquid is used for distilled spirit, and (the COD value is 1.45 * 10 to obtain alcohol (the wine number of degrees are 6.75) and alcohol slops
4Mg/L).
Get above-mentioned alcohol slops, regulate pH value to 8.0 with the lime slurry of 10Be, stir fully, standing, solid-liquid separation, (the COD value is 0.49 * 10 to be precipitated thing (dry weight is 0.007%) and alcohol slops clear liquid
4Mg/L).Reclaim the throw out II, the alcohol slops clear liquid further decolours, and reclaims pigment.
Embodiment 3
Get sugarcane sugarcane juice 500ml, add 400 height of eye purity quartz sands, addition is 200mg, by alcohol fermentation operation rules carry out disinfection, the operations such as inoculation, shaking flask, ferment and finish fermentation after 50 hours.Add 10% sodium hydroxide solution adjust pH to 7.5 to fermented liquid, stir fully, standing, solid-liquid separation is precipitated thing and clear fermented liquid.Reclaim throw out I (dry weight is 0.026%), clear fermented liquid is used for distilled spirit, and (the COD value is 1.78 * 10 to obtain alcohol (the wine number of degrees are 6.76) and alcohol slops
4Mg/L).
Get above-mentioned alcohol slops, the sodium hydroxide solution with 10% is regulated pH value to 8.0, stirs fully, and is standing, solid-liquid separation, and (the COD value is 0.59 * 10 to be precipitated thing (dry weight is 0.009%) and alcohol slops clear liquid
4Mg/L).Reclaim the throw out II, the alcohol slops clear liquid further decolours, and reclaims pigment.
Embodiment 4
Get sugarcane sugarcane juice 500ml, add 400 height of eye purity quartz sands, addition is 150mg, by alcohol fermentation operation rules carry out disinfection, the operations such as inoculation, shaking flask, ferment and finish fermentation after 50 hours.The lime slurry adjust pH to 7.5 that adds 10Be to fermented liquid stirs fully, and is standing, and solid-liquid separation is precipitated thing and clear fermented liquid.Reclaim throw out I (dry weight is 0.025%), clear fermented liquid is used for distilled spirit, and (the COD value is 1.57 * 10 to obtain alcohol (the wine number of degrees are 6.48) and alcohol slops
4Mg/L).
Get above-mentioned alcohol slops, regulate pH value to 7.5 with the lime slurry of 10Be, stir fully, standing, solid-liquid separation, (the COD value is 0.52 * 10 to be precipitated thing (dry weight is 0.01%) and alcohol slops clear liquid
4Mg/L).Reclaim the throw out II, the alcohol slops clear liquid further decolours, and reclaims pigment.
Embodiment 5
Get sugarcane sugarcane juice 500ml, add 180 order perlite powders, addition is 200mg, by alcohol fermentation operation rules carry out disinfection, the operations such as inoculation, shaking flask, ferment and finish fermentation after 50 hours.Add 10% sodium hydroxide solution adjust pH to 7.5 to fermented liquid, stir fully, standing, solid-liquid separation is precipitated thing and clear fermented liquid.Reclaim throw out I (dry weight is 0.031%), clear fermented liquid is used for distilled spirit, and (the COD value is 1.63 * 10 to obtain alcohol (the wine number of degrees are 6.80) and alcohol slops
4Mg/L).
Get above-mentioned alcohol slops, regulate pH value to 8.0 with the lime slurry of 10Be, stir fully, standing, solid-liquid separation, (the COD value is 0.61 * 10 to be precipitated thing (dry weight is 0.012%) and alcohol slops clear liquid
4Mg/L).Reclaim the throw out II, the alcohol slops clear liquid further decolours, and reclaims pigment.
Embodiment 6
Get sugarcane sugarcane juice 500ml, add 180 order perlite powders, addition is 250mg, by alcohol fermentation operation rules carry out disinfection, the operations such as inoculation, shaking flask, ferment and finish fermentation after 50 hours.Add 10% sodium hydroxide solution adjust pH to 7.5 to fermented liquid, stir fully, standing, solid-liquid separation is precipitated thing and clear fermented liquid.Reclaim throw out I (dry weight is 0.033%), clear fermented liquid is used for distilled spirit, and (the COD value is 1.58 * 10 to obtain alcohol (the wine number of degrees are 6.87) and alcohol slops
4Mg/L).
Get above-mentioned alcohol slops, regulate pH value to 8.0 with the lime slurry of 10Be, stir fully, standing, solid-liquid separation, (the COD value is 0.55 * 10 to be precipitated thing (dry weight is 0.011%) and alcohol slops clear liquid
4Mg/L).Reclaim the throw out II, the alcohol slops clear liquid further decolours, and reclaims pigment.
Embodiment 7
Get sugarcane sugarcane juice 500ml, add 180 order perlite powder 150mg, 400 height of eye purity quartz sand 100mg, by alcohol fermentation operation rules carry out disinfection, the operations such as inoculation, shaking flask, ferment and finish fermentation after 50 hours.Add 10% sodium hydroxide solution adjust pH to 7.5 to fermented liquid, stir fully, standing, solid-liquid separation is precipitated thing and clear fermented liquid.Reclaim throw out I (dry weight is 0.025%), clear fermented liquid is used for distilled spirit, and (the COD value is 1.98 * 10 to obtain alcohol (the wine number of degrees are 6.95) and alcohol slops
4Mg/L).
Get above-mentioned alcohol slops, regulate pH value to 8.0 with the lime slurry of 10Be, stir fully, standing, solid-liquid separation, (the COD value is 0.49 * 10 to be precipitated thing (dry weight is 0.012%) and alcohol slops clear liquid
4Mg/L).Reclaim the throw out II, the alcohol slops clear liquid further decolours, and reclaims pigment.
Embodiment 8
Get sugarcane sugarcane juice 500ml, add 180 order perlite powder 100mg, 400 height of eye purity quartz sand 100mg, 300 order diatomite 50mg by alcohol fermentation operation rules carry out disinfection, the operations such as inoculation, shaking flask, ferment and finish fermentation after 50 hours.Add 10% sodium hydroxide solution adjust pH to 7.5 to fermented liquid, stir fully, standing, solid-liquid separation is precipitated thing and clear fermented liquid.Reclaim throw out I (dry weight is 0.031%), clear fermented liquid is used for distilled spirit, and (the COD value is 1.74 * 10 to obtain alcohol (the wine number of degrees are 6.75) and alcohol slops
4Mg/L).
Get above-mentioned alcohol slops, regulate pH value to 8.0 with the lime slurry of 10Be, stir fully, standing, solid-liquid separation, (the COD value is 0.62 * 10 to be precipitated thing (dry weight is 0.011%) and alcohol slops clear liquid
4Mg/L).Reclaim the throw out II, the alcohol slops clear liquid further decolours, and reclaims pigment.
Throw out dry weight in above each embodiment is the per-cent that the throw out dry weight of removing after ultra-fine grain weight accounts for throw out and clear fermented liquid total mass.
Embodiment 9
The contrast experiment 1:
Get sugarcane sugarcane juice 500ml, do not add particle, by alcohol fermentation operation rules carry out disinfection, the operations such as inoculation, shaking flask, ferment and finish fermentation after 50 hours.Standing, solid-liquid separation is precipitated thing and clear fermented liquid.Reclaim throw out I (dry weight is 0.016%), clear fermented liquid is used for distilled spirit, and (the COD value is 1.85 * 10 to obtain alcohol (the wine number of degrees are 6.24) and alcohol slops
4Mg/L).
Get above-mentioned alcohol slops, standing, solid-liquid separation, (the COD value is 0.87 * 10 to be precipitated thing (dry weight is 0.004%) and alcohol slops clear liquid
4Mg/L).Reclaim the throw out II, the alcohol slops clear liquid further decolours, and reclaims pigment.
The contrast experiment 2
Get sugarcane sugarcane juice 500ml, do not add particle, by alcohol fermentation operation rules carry out disinfection, the operations such as inoculation, shaking flask, ferment and finish fermentation after 50 hours.Add 10% sodium hydroxide solution adjust pH to 7.5, stir fully, standing, solid-liquid separation is precipitated thing and clear fermented liquid.Reclaim throw out I (dry weight is 0.019%), clear fermented liquid is used for distilled spirit, and (the COD value is 1.78 * 10 to obtain alcohol (the wine number of degrees are 6.27) and alcohol slops
4Mg/L).
Get above-mentioned alcohol slops, the lime slurry of 10Be is regulated pH value to 8.0, stirs fully, and is standing, solid-liquid separation, and (the COD value is 0.76 * 10 to be precipitated thing (dry weight is 0.005%) and alcohol slops clear liquid
4Mg/L).Reclaim the throw out II, the alcohol slops clear liquid further decolours, and reclaims pigment.
Solid-liquid separation in above-described embodiment 1-9 adopts centrifugal, and the centrifugal 20min-30min. of 3000r/min can also adopt alternate manner to separate in actually operating, filters as half frame filter.
Embodiment 1-9 shows, adds ultra-fine grain can effectively improve the fermentation rate of alcohol, effectively remove more non-alcohol solid substance in the sugarcane alcohol fermentation liquid.In addition, the potential of hydrogen of suitably adjusting fermented liquid can more effectively be removed more non-alcohol solid substance.
Embodiment 10
(1) thick decolouring
Absorption: with alcohol slops clear liquid (the former OD of above-described embodiment 2 gained
420nm=1.580) with the flow velocity of 5BV/ hour by PVA-based strongly basic anion ion exchange fibre post, when fiber reaches absorption when saturated, stop absorption, obtain destainer I (OD
420nm=0.391; Percent of decolourization is 75.3%);
Wash-out: the NaCl regenerated liquid (NaOH adjust pH to 12.0) with 80L 7.5% carries out wash-out, and flow velocity is 1BV/h, collects regenerated liquid;
Concentrated: as regenerated liquid to be concentrated under the certain vacuum degree with Rotary Evaporators obtain pigment mucus, more further dry, grind and obtain product pigment.
(2) essence decolouring
Absorption: the destainer I that will obtain through thick decolouring by the D101 macroporous adsorptive resins, when resin reaches absorption when saturated, stops absorption with the flow velocity of 10BV/ hour.Obtain destainer II (OD
420nm=0.191; Be 87.91% with respect to former sugarcane juice alcohol slops percent of decolourization);
Wash-out: the aqueous ethanolic solution with 30L 60% volume fraction carries out wash-out, and flow velocity is 1BV/h, collects elutriant;
Concentrated: as elutriant to be concentrated under the certain vacuum degree with Rotary Evaporators obtain pigment mucus, more further dry, grind and obtain product pigment.
Embodiment 11
(1) thick decolouring
Absorption: with alcohol slops clear liquid (the former OD of above-described embodiment 3 gained
420nm=1.839) with the flow velocity of 12BV/ hour by viscose glue base strongly basic anion ion exchange fibre post, when fiber reaches absorption when saturated, stop absorption, obtain destainer I (OD
420nm=0.500; Percent of decolourization is 72.8%);
Wash-out: the NaCl regenerated liquid (NaOH adjust pH to 10.0) with 70L 12% carries out wash-out, and flow velocity is 3BV/h, collects regenerated liquid;
Concentrated: as regenerated liquid to be concentrated under the certain vacuum degree with Rotary Evaporators obtain pigment mucus, more further dry, grind and obtain product pigment.
(2) essence decolouring
Absorption: the destainer I that will obtain through thick decolouring by the D101 macroporous adsorptive resins, when resin reaches absorption when saturated, stops absorption with the flow velocity of 5BV/ hour.Obtain destainer II (OD
420nm=0.230; Be 87.52% with respect to former sugarcane juice alcohol slops percent of decolourization);
Wash-out: the aqueous ethanolic solution with 40L 40% volume fraction carries out wash-out, and flow velocity is 0.5BV/h, collects elutriant;
Concentrated: as elutriant to be concentrated under the certain vacuum degree with Rotary Evaporators obtain pigment mucus, more further dry, grind and obtain product pigment.
Embodiment 12
(1) thick decolouring
Absorption: with alcohol slops clear liquid (the former OD of above-described embodiment 5 gained
420nm=2.252) with the flow velocity of 5BV/ hour by polypropylene-base strongly basic anion ion exchange fibre post, when fiber reaches absorption when saturated, stop absorption, obtain destainer I (OD
420nm=0.691; Percent of decolourization is 69.5%);
Wash-out: the NaCl regenerated liquid (NaOH adjust pH to 14.0) with 100L 7.5% carries out wash-out, and flow velocity is 1BV/h, collects regenerated liquid;
Concentrated: as regenerated liquid to be concentrated under the certain vacuum degree with Rotary Evaporators obtain pigment mucus, more further dry, grind and obtain product pigment.
(2) essence decolouring
Absorption: the destainer I that will obtain through thick decolouring by the D101 macroporous adsorptive resins, when resin reaches absorption when saturated, stops absorption with the flow velocity of 5BV/ hour.Obtain destainer II (OD
420nm=0.423; Be 81.21% with respect to former sugarcane juice alcohol slops percent of decolourization);
Wash-out: the aqueous ethanolic solution with 30L 70% volume fraction carries out wash-out, and flow velocity is 1BV/h, collects elutriant;
Concentrated: as elutriant to be concentrated under the certain vacuum degree with Rotary Evaporators obtain pigment mucus, more further dry, grind and obtain product pigment.
In embodiment 10-12, except available Rotary Evaporators carry out pigment concentrated, also can adopt other common methods to concentrate, as lyophilize.
In embodiment 10-12, the destainer II can reach more than 90% with respect to former sugarcane juice alcohol slops percent of decolourization, is light color, can be used as the infiltration water of cane milling extracting Sucrose or further simply discharges after biochemical treatment.
Claims (2)
1. the pretreatment process of sugarcane sugarcane juice alcohol fermentation liquid, comprise the steps:
1) when the sugarcane juice zymamsis, add 300 purpose ultra-fine grains, the pH to 7.0 of the complete rear adjusting fermented liquid that ferments, solid-liquid separation, solid reclaims, and liquid is used for extracting alcohol;
2) pH to 8.0 of the alcohol slops after adjusting extraction alcohol, solid-liquid separation, solid reclaims, and liquid is further processed;
Described ultra-fine grain is diatomite;
The addition of described ultra-fine grain is the 160mg/L sugarcane juice.
2. the extracting method of the high value of sugarcane sugarcane juice alcoholic fermentation waste liquor product, comprise step 2 in claim 1) liquid that obtains of solid-liquid separation decolours, and extracts pigment, comprise the steps:
(1) with step 2 in claim 1) liquid that obtains of solid-liquid separation slightly decolours by the ion-exchange fiber post;
(2) solution after step (1) decolouring is carried out the essence decolouring after adsorption resin column;
(3) with regenerated liquid, the ion-exchange fiber post of step (1) is carried out wash-out, collect regenerated liquid;
(4) with elutriant, the adsorption resin column of step (2) is carried out wash-out, collect elutriant;
(5) regenerated liquid of step (3), (4) being collected and elutriant concentrate respectively and obtain pigment;
Described ion-exchange fiber post is the strongly basic anion ion exchange fibre post;
Described adsorption resin column is macroporous adsorptive resins;
Described regenerated liquid is the NaCl solution of 2.5%-15% massfraction, and the pH value is 7.0-14.0;
Described elutriant is the ethanol of 20%-100% volume fraction.
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