CN1415755A - Method for producing citric acid by fermenting paddy rice - Google Patents
Method for producing citric acid by fermenting paddy rice Download PDFInfo
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- CN1415755A CN1415755A CN 02153419 CN02153419A CN1415755A CN 1415755 A CN1415755 A CN 1415755A CN 02153419 CN02153419 CN 02153419 CN 02153419 A CN02153419 A CN 02153419A CN 1415755 A CN1415755 A CN 1415755A
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- citric acid
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Abstract
A process for preparing citric acid by fermenting unhusked rich inlcudes such steps as pulverizing, mixing it with water, adding alpha-amylase, liquefying, filter, inoculating Aspergillus niger, fermenting, filter, adding calcium hydroxide for neutralizing, stirring, adding concentrated sulfuric acid for acidifying, adsorptive decoloring, ion exchange, concentrating, crystallizing and centrifugal drying.
Description
Technical field
The present invention relates to a kind of production methods of citric acid, particularly a kind of novel method with the paddy fermentation production of citric acid.
Background technology
For a long time, be raw material to produce citric acid all with Ipomoea batatas, cassava and corn, be that raw material to produce citric acid produces a large amount of unserviceable fermentation residue serious environment pollutions with the potato class.Be that raw material is made citric acid with the rice in research and trial production in recent years, but because rice lacks the necessary VITAMIN of growth and trace element and high viscosity thereof, high foaming character, cause that the rice fermentation acid production rate is low, the cycle is long, difficulty in filtration is big and fermenting process in multinomial great bottleneck problem such as high strength foaming, be difficult to so far solve; For many years, people just are devoted to study the aspergillus niger strain that improvement is used for rice fermentation, attempt to make bacterial classification to adapt to rice raw material, but do not make a breakthrough always, it is the method for raw material to produce citric acid that present its economic and technical norms also are starkly lower than with Ipomoea batatas, cassava and corn, makes the eager desire that makes full use of the overstocked rice of huge stocks be difficult to realize.
Summary of the invention
The purpose of this invention is to provide a kind of every economic and technical norms obviously is better than existing technology, utilizes huge stocks to overstock paddy is produced citric acid for fermenting raw materials novel method.
The present invention realizes by following technical proposal: add water after paddy is pulverized, making concentration is 20-30%, the paddy slurry of PH=5.5-7, input liquefied pot; Be that 0.5-0.8 ‰ adds α-Dian Fenmei by weight ratio, adopt continuous injection technology or boiling liquefaction process at intermittence to liquefy; The material input pressure filter that will liquefy carries out the first time and filters, and filter residue can be made into the protein powder as first-class feed; Filtrate is imported fermentor tank heat to 100-110 ℃ of sterilization, when being quickly cooled to 36-38 ℃, the aspergillus niger test tube strains is inserted fermentor tank after the seeding tank enlarged culturing, filtrate is fermented; Again fermented liquid is imported pressure filter and carried out the filtration second time; The press filtration acid solution of gained of removing slag enters neutralization bucket, adds calcium hydroxide when heating to 60-80 ℃, is warming up to 80-90 ℃ again, stirs to wash with water after neutralizing in 10-30 minute, must citrate of lime; Add the vitriol oil after citrate of lime sized mixing, carry out acidolysis, add gac and carry out adsorption bleaching to PH=1.5-2; Carry out ion-exchange with 732 resin cation (R.C.)s and feed liquid again; Concentrate then, crystallization, centrifugal drying get product citric acid; At last finished product is tested, measured and packs.
The present invention utilizes the paddy fermentation production of citric acid, not only exempted the operation of shelling, what also make full use of processing paddy abandons material---and husk is as flocculating aids and slow down foaming intensity significantly, because contain in the husk as nutrition library just that rice lacks and be necessary VITAMIN of growth and trace element just, thus the rice fermentation acid production rate that is unable to is low to attacking for a long time, the cycle long, difficulty in filtration is big and fermenting process in the difficult problem of multinomial great bottleneck problem such as high strength foaming be readily solved.The present invention can relax the difficulty that rice is sold in the numerous paddy rice grain-producing area peasant household good harvest back of China greatly, reduces the pressure and the loss of national food stock; Filter residue can be made into the rice protein powder as first-class feed, because of producing a large amount of useless waste residue contaminate environment, has not solved the problem of environmental pollution of producing in the citric acid fermentation process fully; It is the traditional method of raw material to produce citric acid with rice, Ipomoea batatas, cassava and corn that every economic and technical norms particularly of the present invention all obviously are better than existing.Because the present invention has above-mentioned advantage, it apply with great economic benefit of generation and social benefit.
Description of drawings
Accompanying drawing is a process flow sheet of the present invention.
Specific embodiments
The technical process of embodiment is as shown in drawings: add water after will paddy pulverizing, making concentration is 20-30%, the paddy slurry of PH=5.5-7, input liquefied pot; Adding is 0.5-0.8 ‰ α-Dian Fenmei by weight ratio, adopts continuous injection technology to liquefy; The material input pressure filter that will liquefy carries out the first time and filters, and filter residue is used to make the rice protein powder as first-class feed; Filtrate is imported fermentor tank heat to 100-110 ℃ of sterilization, when being quickly cooled to 36-38 ℃, the aspergillus niger test tube strains is inserted fermentor tank after the seeding tank enlarged culturing, filtrate is fermented; Fermented liquid is imported pressure filter again and carried out the second time and filter, the press filtration acid solution of the gained that removes slag enters neutralization bucket, adds calcium hydroxide when heating to 60-80 ℃, heats up 80-90 ℃ again, stirs to wash with water after neutralizing in 10-30 minute, must citrate of lime; Add the vitriol oil after citrate of lime sized mixing, carry out acidolysis, add gac and carry out adsorption bleaching to PH=1.5-2; Carry out ion-exchange with 732 resin cation (R.C.)s and feed liquid again, concentrate then, crystallization, centrifugal drying get product Citric Acid, usp, Anhydrous Powder; At last finished product is tested, measured and packs.
Using gene engineering principle of the present invention, aspergillus niger strain is carried out mutagenesis, make it adapt to rice with special starch chain structure, it is big to lack the necessary VITAMIN of growth and this auxotroph Material Characteristics of trace element and viscosity thereof according to rice simultaneously, sad filter, the great bottleneck problem that occurs in several productions such as high strength foaming, multianalysis research, invention utilizes the extremely abundant paddy of nutrition to make the novel method that fermenting raw materials is produced citric acid, thereby realize the coadaptation mutually of bacterial classification and raw material, particularly all obviously be better than existing similar technology from the visible economic and technical norms of the present invention of following synopsis:
| Economic and technical norms (do not indicate especially be mean value) | With the rice is raw material to produce citric acid | With the potato class is raw material to produce citric acid | With the corn is raw material to produce citric acid | With paddy is raw material to produce citric acid |
| The highest single tank of fermentation and acid rate % fermentation period h fermentation grain consumption t/t finished product of grain consumption t/t produces the highest single tank of sour % and produces the best fermentation index fermentation conversion rate of sour respective cycle h fermentation index % | ??12.4 ??70 ??1.6 ??1.9 ??14 ??90 ??1.5 ??1.7 ??93 | ??13 ??65 ??1.5 ??1.8 ??16 ??72 ??1.7 ??1.9 ??95 | ?13 ?60 ?1.5 ?1.8 ?16.5 ?68 ?1.8 ?2.0 ?96 | ?15 ?52 ?1.35 ?1.7 ?17.6 ?58 ?2.32 ?2.61 ?99 |
Second embodiment adds water after paddy is pulverized, and making concentration is 20-30%, the paddy slurry of PH=5.5-7, input liquefied pot; Adding is the α-Dian Fenmei of 0.5-0.8 ‰ by weight ratio, adopts boiling liquefaction process at intermittence to liquefy, identical with previous embodiment subsequently.
Claims (1)
1. novel method of producing citric acid, comprise get the raw materials ready, liquefy, filter, ferment, neutralization, acidolysis, from operations such as friendship, crystallization, dryings, it is characterized in that:
(1) will add water after the paddy pulverizing, making concentration is 20-30%, the paddy slurry of PH=5.5-7;
(2) with paddy slurry input liquefied pot, be that 0.5-0.8 ‰ adds α-Dian Fenmei by weight ratio, adopt continuous injection liquefaction process or boiling liquefaction process at intermittence to liquefy;
(3) the material input pressure filter that will liquefy carries out filtration first time, and filter residue can be made protein powder;
(4) filtrate is imported fermentor tank and heated to 100-110 ℃ of sterilization, when being quickly cooled to 36-38 ℃, the aspergillus niger test tube strains is inserted fermentor tank after the seeding tank enlarged culturing, filtrate is fermented;
(5) fermented liquid is imported pressure filter and is carried out the second time and filter, remove slag the press filtration acid solution;
(6) press filtration acid solution enters neutralization bucket, adds calcium hydroxide when heating to 60-80 ℃, is warming up to 80-90 ℃ again, stirs to wash with water after neutralizing in 10-30 minute, must citrate of lime;
(7) citrate of lime is sized mixing back enriching sulfuric acid solution to PH=1.5-2, add gac again and carry out adsorption bleaching;
(8) carry out ion-exchange with 732 resin cation (R.C.)s and feed liquid, concentrate then, crystallization, centrifugal drying get product citric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02153419 CN1415755A (en) | 2002-11-27 | 2002-11-27 | Method for producing citric acid by fermenting paddy rice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02153419 CN1415755A (en) | 2002-11-27 | 2002-11-27 | Method for producing citric acid by fermenting paddy rice |
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| CN1415755A true CN1415755A (en) | 2003-05-07 |
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| CN 02153419 Pending CN1415755A (en) | 2002-11-27 | 2002-11-27 | Method for producing citric acid by fermenting paddy rice |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318597C (en) * | 2004-12-28 | 2007-05-30 | 郭冰 | New method of producing citric acid using paddy fermentation |
| CN102399702A (en) * | 2011-11-18 | 2012-04-04 | 中粮生物化学（安徽）股份有限公司 | Aspergillus niger and application thereof as well as citric acid preparation method through fermentation |
| CN101313075B (en) * | 2005-11-28 | 2013-03-20 | 巴斯夫欧洲公司 | Fermentative production of organic compounds using substances containing dextrin |
| CN104911213A (en) * | 2005-09-07 | 2015-09-16 | 巴斯夫欧洲公司 | Fermentative production of non-volatile microbial metabolism products in solid form |
| CN101313076B (en) * | 2005-11-28 | 2015-11-25 | 巴斯夫欧洲公司 | Fermentative production of organic compound |
| CN105506004A (en) * | 2016-01-05 | 2016-04-20 | 安徽丰原发酵技术工程研究有限公司 | Method for producing citric acid by fermenting konjak powder residues |
-
2002
- 2002-11-27 CN CN 02153419 patent/CN1415755A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318597C (en) * | 2004-12-28 | 2007-05-30 | 郭冰 | New method of producing citric acid using paddy fermentation |
| CN104911213A (en) * | 2005-09-07 | 2015-09-16 | 巴斯夫欧洲公司 | Fermentative production of non-volatile microbial metabolism products in solid form |
| CN101313075B (en) * | 2005-11-28 | 2013-03-20 | 巴斯夫欧洲公司 | Fermentative production of organic compounds using substances containing dextrin |
| US8728773B2 (en) | 2005-11-28 | 2014-05-20 | Matthias Boy | Fermentative production of organic compounds using substances containing dextrin |
| CN101313076B (en) * | 2005-11-28 | 2015-11-25 | 巴斯夫欧洲公司 | Fermentative production of organic compound |
| CN102399702A (en) * | 2011-11-18 | 2012-04-04 | 中粮生物化学（安徽）股份有限公司 | Aspergillus niger and application thereof as well as citric acid preparation method through fermentation |
| CN105506004A (en) * | 2016-01-05 | 2016-04-20 | 安徽丰原发酵技术工程研究有限公司 | Method for producing citric acid by fermenting konjak powder residues |
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