CN102120114A - Method for pretreating ethanol fermentation liquor of food and kitchen waste by flocculation-filtration combined process - Google Patents
Method for pretreating ethanol fermentation liquor of food and kitchen waste by flocculation-filtration combined process Download PDFInfo
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- CN102120114A CN102120114A CN 201010562885 CN201010562885A CN102120114A CN 102120114 A CN102120114 A CN 102120114A CN 201010562885 CN201010562885 CN 201010562885 CN 201010562885 A CN201010562885 A CN 201010562885A CN 102120114 A CN102120114 A CN 102120114A
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Abstract
The invention belongs to the field of biological fermentation and relates to a method for treating ethanol fermentation liquor of food and kitchen waste, which comprises the following process steps: adding hydrochloric acid or sodium hydroxide into the fermentation liquid to regulate the pH value of the fermentation liquor to 2 to 10, and heating to 30 to 60 DEG C; adding 0.5 to 1.0 gram of flocculant per liter, uniformly stirring for 5 minutes at a constant rotation speed of 800r/min, standing and settling for 30 minutes; subjecting the flocculated fermentation liquor to solid-liquid separation to remove the flocculate from the fermentation liquor; transferring the separated liquid phase to a subsequent fiber ball-quartz sand composite filter column for filtration; and transferring the filtrate obtained after filtration into a pervaporation system for separating ethanol. The invention has the advantages that: the operation is simple; the cost is low; the treatment efficiency is high; the target product is hardly damaged; the method is an excellent method for treating the fermentation liquor of food and kitchen waste; and more space is provided for the further purification and utilization of the fermentation liquor.
Description
Technical field:
The invention belongs to the biofermentation field, relate to a kind of processing method of kitchen waste ethanol fermentation liquid.
Background technology:
In recent years, along with constant development of economy, fossil energy exhausted day by day is subjected to people day by day to the research of regenerative resource and payes attention to.Alcohol fuel is simple owing to its preparation technology, and can be used as the ethanol petrol use, has obtained the extensive concern of countries in the world.In recent years, people have carried out broad research to the technology of utilizing microbial fermentation to produce alcohol fuel.Chinese patent CN100478437C discloses a kind of way of producing fuel alcohol by kitchen garbage fermentation, is raw material with changing food waste with low cost, adds carbohydrase and saccharomycete and ferments, and makes the zymotic fluid that ethanol content is 5-11%.But when it extracts ethanol from zymotic fluid, use be traditional way of distillation, complicated operation and energy consumption are higher, if can seek the cheaper ethanol isolation technics of cost, will further reduce the operating cost of this technology.
Infiltration evaporation is as a kind of novel membrane separation technique, since the sixties in last century since its in separation process intrinsic low energy consumption, do not introduce advantages such as the 3rd component, blowdown are few, obtained people's recognition and acceptance gradually.At present infiltration evaporation has been realized industrialization in high concentration ethanol/water dehydration field, in rare alcohol/water dealcoholysis field at present also in research and development, but realize on this direction efficient separation to reduce the alcohol production cost, it is all significant to reduce energy consumption.At present in the research that wide model has all been arranged aspect membrane module, the membrane technology, wherein patent CN1101249C has announced a kind of method of using separating aqueous solution of alcohol with polyvinylidene fluoride permeable vaporizing membrane, the ethanolic solution that this method can separating alcohol solution 0.1%-20%.CN1186450C has announced the method for a kind of biomass ferment and film infiltration Joint Production absolute ethyl alcohol, wherein fermentation clear liquid will be through the inorganic filter membrane of 0.1-1um, enter the infiltration evaporation system then, as seen zymotic fluid is carried out suitable pre-treatment helps its follow-up lock out operation.Publication number be CN 101235389A patent disclosure the method for a kind of fermentation and infiltration evaporation Joint Production ethanol, this method realizes separating of solid content and clear liquid by screen pack formula separator is set in fermentation tank bottom, clear liquid carries out infiltration evaporation to be separated, and this measure can alleviate the pollution of zymotic fluid to follow-up infiltration evaporation by separating solid content.
Kitchen waste ethanol fermentation liquid complicated component, contain a large amount of oil contents and viscose glue shape suspended impurity, general processing method is difficult to remove fully, these impurity can stick to the surface of infiltrating and vaporizing membrane, cause the pollution of film, therefore, inquire into easy and simple to handle, effect is obvious, and changing food waste fermentation liquor pretreatment method with low cost is very necessary.But still lack this Study on Technology and exploitation at present.
Summary of the invention
In order to address the above problem, the purpose of this invention is to provide a kind of method by flocculation-filtration associating, under the situation that does not influence ethanol content in the zymotic fluid, remove oil content and suspended solid (SS) in the zymotic fluid, make zymotic fluid after the processing can be better carry out pretreated method to kitchen waste ethanol fermentation liquid by what infiltrating and vaporizing membrane carried out the ethanol separation.
Technical solution of the present invention is: the method for a kind of flocculation-filtration associating preliminary treatment kitchen waste ethanol fermentation liquid, this method comprises the steps:
Step 1: zymotic fluid is added hydrochloric acid or NaOH adjusting pH value to 2～10, be heated to 30～60 ℃;
Step 2: add flocculant, 5min is at the uniform velocity stirred, standing sedimentation 30min with the rotating speed of 800r/min in the back; Wherein, the quality volumetric concentration of flocculant in zymotic fluid is 0.5g/L～1.0g/L;
Step 3: use decantation or plate compression method to carry out Separation of Solid and Liquid to the zymotic fluid after the flocculation and remove flco in the zymotic fluid;
Step 4: the liquid phase after separating enters long 20-30cm, and the compound filter post of fibrous nodules-quartz sand of diameter 3-5cm filters;
Step 5: the filtrate after handling after filtration enters the infiltration evaporation system and carries out the ethanol separation.
Described zymotic fluid is that kitchen waste ethanol fermentation is after the mixture that contains ethanol, oil content, residual sugar, protein and bacterial chip that the plate and frame filter press press filtration obtains.
In the above-mentioned steps (1), with the pH value of hydrochloric acid or NaOH adjusting zymotic fluid.Add different flocculants, the pH value scope difference that it is suitable.The optimum pH value scope of adding gelatin is 7～10, and the optimum pH value of tannic acid is 2～5.
The flocculant that joins in the above-mentioned steps (2) in the zymotic fluid is gelatin or tannic acid organic flocculant.From flocculating effect, add the gelatin and the tannic acid of equivalent, the former flocculating effect obviously is better than the latter.By adding flocculant, can sedimentation remove the most of starch in the zymotic fluid, suspended impurities such as bacterial chip, protein, pigment not have to influence to the ethanol content in the liquid phase substantially.
In the above-mentioned steps (5), by the membrane separation concentrated ethanol that contracts, its membrane separation process is the infiltration evaporation method through the pretreated zymotic fluid of flocculation-filtration associating.
The present invention is simple to operate, with low cost, and to not obviously influence of the ethanol content in the zymotic fluid, zymotic fluid after treatment can satisfy the water inlet requirement of infiltration evaporation process, for this emerging membrane separation technique with low cost of infiltration evaporation provides bigger possibility in the commercial Application aspect the kitchen waste ethanol fermentation.
The specific embodiment
Embodiment 1
Changing food waste is carried out preliminary sorting, remove the foreign material that are difficult for fermentation, filter is done, and solid matter is pulverized; Add the water of 1 times of solid matter quality, mix, obtain the rubbish slurry; Add Angel solid dry ferment in the rubbish slurry, addition is every 100g rubbish slurry 0.1g, adds the carbohydrase of 5kU simultaneously according to every 100g rubbish slurry; Postvaccinal rubbish is starched the anaerobic condition bottom fermentation 48h at 35 ℃; Rubbish after fermentation slurry is carried out Separation of Solid and Liquid by modes such as press filtrations, and gained liquid is the changing food waste zymotic fluid.
Get changing food waste zymotic fluid 50ml, regulating the pH value is 10, be heated to 30 ℃, press table 1 and add gelatin, obvious flocculate appears about the rotating speed even stirring 5min of Chang Su with 800r/min, standing sedimentation 30min, and inclining supernatant, be delivered in the compound filter post of fibrous nodules-quartz sand with peristaltic pump and filter, each phase process effect is as shown in table 1:
The contrast of table 1 gelatin different amounts effect
* 1 clearance=[this content of material before (Combined Treatment before this content of material-Combined Treatment after this content of material)/Combined Treatment] * 100%
* 2 ethanol loss lates=[concentration of alcohol before (Combined Treatment before concentration of alcohol-Combined Treatment after concentration of alcohol)/Combined Treatment] * 100%
Embodiment 2
Make the changing food waste zymotic fluid by embodiment 1 described method, get changing food waste zymotic fluid 50ml, regulating the pH value is 2, be heated to 40 ℃, press table 2 and add tannic acid, obvious flocculate to occur about the even 5min of stirring of the rotating speed of 800r/min, standing sedimentation 30min, inclining supernatant, is delivered in the compound filter post of fibrous nodules-quartz sand with peristaltic pump and filters, and each phase process effect is as shown in table 2:
The contrast of table 2 tannic acid different amounts effect
* 1 clearance=[this content of material before (Combined Treatment before this content of material-Combined Treatment after this content of material)/Combined Treatment] * 100%
* 2 ethanol loss lates=[concentration of alcohol before (Combined Treatment before concentration of alcohol-Combined Treatment after concentration of alcohol)/Combined Treatment] * 100%
Embodiment 3
Make the changing food waste zymotic fluid by embodiment 1 described method, get changing food waste zymotic fluid 50ml, regulating the pH value is 8, be heated to 50 ℃, press table 2 and add gelatin, obvious flocculate to occur about the even 5min of stirring of the rotating speed of 800r/min, standing sedimentation 30min, inclining supernatant, is delivered in the compound filter post of fibrous nodules-quartz sand with peristaltic pump and filters, and each phase process effect is as shown in table 2:
The contrast of table 3 tannic acid different amounts effect
* 1 clearance=[this content of material before (Combined Treatment before this content of material-Combined Treatment after this content of material)/Combined Treatment] * 100%
* 2 ethanol loss lates=[concentration of alcohol before (Combined Treatment before concentration of alcohol-Combined Treatment after concentration of alcohol)/Combined Treatment] * 100%
Claims (5)
1. the method for a flocculation-filtration associating preliminary treatment kitchen waste ethanol fermentation liquid is characterized in that comprising the steps:
Step 1: zymotic fluid is added hydrochloric acid or NaOH adjusting pH value to 2～10, be heated to 30～60 ℃;
Step 2: add flocculant, 5min is at the uniform velocity stirred, standing sedimentation 30min with the rotating speed of 800r/min in the back; Wherein, the quality volumetric concentration of flocculant in zymotic fluid is 0.5g/L～1.0g/L;
Step 3: use decantation or plate compression method to carry out Separation of Solid and Liquid to the zymotic fluid after the flocculation and remove flco in the zymotic fluid;
Step 4: the liquid phase after separating enters long 20-30cm, and the compound filter post of fibrous nodules-quartz sand of diameter 3-5cm filters;
Step 5: the filtrate after will handling after filtration enters the infiltration evaporation system and carries out the ethanol separation.
2. the method for flocculation according to claim 1-filtration associating preliminary treatment kitchen waste ethanol fermentation liquid, it is characterized in that described zymotic fluid is that kitchen waste ethanol fermentation is after the mixture that contains ethanol, oil content, residual sugar, protein and bacterial chip that the plate and frame filter press press filtration obtains.
3. the method for flocculation according to claim 1-filtration associating preliminary treatment kitchen waste ethanol fermentation liquid is characterized in that described flocculant is tannic acid or gelatin.
4. the method for flocculation according to claim 1-filtration associating preliminary treatment kitchen waste ethanol fermentation liquid, it is characterized in that, the compound filter post of fibrous nodules-quartz sand described in the described step 4. is that lucite is made, long 20-30cm, diameter 3-5cm, upper strata filling fiber ball, lower floor's filling quartz sand, the filling length of the two accounts for 1/2 of filter column length respectively.
5. the method by flocculation-filtration associating preliminary treatment kitchen waste ethanol fermentation liquid according to claim 1 is characterized in that what ethanol separated employing in the described step 5. is the infiltration evaporation method.
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| CN 201010562885 CN102120114B (en) | 2010-11-23 | 2010-11-23 | Method for pretreating ethanol fermentation liquor of food and kitchen waste by flocculation-filtration combined process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110510825A (en) * | 2019-09-11 | 2019-11-29 | 东莞博润环保科技有限公司 | The method for treating garbage percolation liquid and its processing system of zero concentrate |
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| JPH0760299A (en) * | 1993-08-24 | 1995-03-07 | Kyodo Kumiai Inbaiomento | Method for pressure-dehydrating fermentable organic liquid with high efficiency |
| JPH07308656A (en) * | 1994-05-20 | 1995-11-28 | Toyo Dynam Kk | Apparatus for treating organic waste |
| CN1948498A (en) * | 2006-10-24 | 2007-04-18 | 北京科技大学 | Method of producing fuel alcohol by kitchen garbage fermentation |
| CN101186400A (en) * | 2007-12-18 | 2008-05-28 | 黄大军 | Harmless treatment method for discarded slurry |
| CN101235389A (en) * | 2008-03-04 | 2008-08-06 | 南京工业大学 | Process for producing ethanol by coupling fermentation and pervaporation |
| CN101823953A (en) * | 2010-03-31 | 2010-09-08 | 北京科技大学 | Method for separating lactic acid from fermentation liquor by flocculation and carrying out flocculate comprehensive utilization |
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- 2010-11-23 CN CN 201010562885 patent/CN102120114B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0760299A (en) * | 1993-08-24 | 1995-03-07 | Kyodo Kumiai Inbaiomento | Method for pressure-dehydrating fermentable organic liquid with high efficiency |
| JPH07308656A (en) * | 1994-05-20 | 1995-11-28 | Toyo Dynam Kk | Apparatus for treating organic waste |
| CN1948498A (en) * | 2006-10-24 | 2007-04-18 | 北京科技大学 | Method of producing fuel alcohol by kitchen garbage fermentation |
| CN101186400A (en) * | 2007-12-18 | 2008-05-28 | 黄大军 | Harmless treatment method for discarded slurry |
| CN101235389A (en) * | 2008-03-04 | 2008-08-06 | 南京工业大学 | Process for producing ethanol by coupling fermentation and pervaporation |
| CN101823953A (en) * | 2010-03-31 | 2010-09-08 | 北京科技大学 | Method for separating lactic acid from fermentation liquor by flocculation and carrying out flocculate comprehensive utilization |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110510825A (en) * | 2019-09-11 | 2019-11-29 | 东莞博润环保科技有限公司 | The method for treating garbage percolation liquid and its processing system of zero concentrate |
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Inventor after: Gao Ming Inventor after: Wang Qunhui Inventor after: Zhang Wenyu Inventor after: Ma Hongzhi Inventor after: Wang Lijuan Inventor after: Zhao Fangni Inventor before: Wang Qunhui Inventor before: Zhang Wenyu Inventor before: Ma Hongzhi Inventor before: Wang Lijuan Inventor before: Gao Ming Inventor before: Zhao Fangni |
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Effective date of registration: 20210706 Address after: 015000 No.2 farm breeding Park, xishanzui farm, Wulashan Town, wulateqian banner, Bayannaoer City, Inner Mongolia Autonomous Region Patentee after: Inner Mongolia Xinwang bio fertilizer technology Co.,Ltd. Address before: 100083 No. 30, Haidian District, Beijing, Xueyuan Road Patentee before: University OF SCIENCE AND TECHNOLOGY BEIJING |