CN103222538B - Method for recycling low-threonine-content ceramic membrane dialysate - Google Patents
Method for recycling low-threonine-content ceramic membrane dialysate Download PDFInfo
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- CN103222538B CN103222538B CN201310085857.3A CN201310085857A CN103222538B CN 103222538 B CN103222538 B CN 103222538B CN 201310085857 A CN201310085857 A CN 201310085857A CN 103222538 B CN103222538 B CN 103222538B
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Abstract
The invention discloses a method for recycling a low-threonine-content ceramic membrane dialysate. The method is characterized in that a broth obtained after the later-stage filtration of a ceramic membrane is added with water for dilution, and a dialysate having a Baume degree below 2DEG Be is collected in a recovery tank, and is reused in the next-batch later-stage filtration of the ceramic membrane to dilute the broth. The method allows the low-acid-content dialysate to be recycled without influencing the filter flux of the ceramic membrane, the quality of the dialysate or the filtering yield, and has the advantages of clear water application amount saving, energy consumption and power consumption reduction, benefiting for the steadiness of an evaporation system and the stability of the threonine crystallization quality, and sewage discharge reduction.
Description
technical field
The invention belongs to threonine production technical field, be specifically related to a kind of method of recycling low content threonine ceramic membrane dislysate.
background technology
At present, domestic many producers are used ceramic membrane system to filter.Ceramic membrane is the asymmetric diffusion barrier of making as aluminium oxide, titanium oxide etc. with ceramic material, under the effect of operation pressure reduction, feed liquid is cross-flow passes in film pipe, the part that is less than membrane aperture enters per-meate side by fenestra becomes dislysate, and the material tunicle that is greater than aperture is held back and becomes concentrate, thus the object that reaches separating substances, concentrates and purify.Be mainly used in the industry such as recovery, food fermentation of biology, medicine, Industrial Wastewater Treatment and organic substance.Use ceramic membrane system to filter to have that chemical stability is good, acidproof, alkaline-resisting, organic solvent-resistant, high temperature resistant; Cross-flow filtration, can not form filter cake, and the ongoing operation time is long, and power of regeneration is strong; Pore-size distribution is narrow, and separative efficiency is high, and separation process is simple, and corollary apparatus is few, and operation running is easy, long service life, the features such as low energy consumption.
At present, ceramic membrane filter has been applied to the filtering and concentrating link of threonine fermentation liquid, to reach impurity and concentrated objects such as removing mycoprotein.But when ceramic membrane filter concentrate is concentrated into 6-7 times, membrane flux will decline very fast, in order to continue to filter out the threonine in concentrate, need to add clear water dilution concentrate, this just causes the ceramic membrane filter later stage to produce the dislysate that a large amount of threonine contents is very low, affected vapo(u)rization system stationarity and crystalline quality stability below, caused the consumption of more water, electricity, vapour, made production cost increase.
summary of the invention
The object of this invention is to provide a kind of method of recycling low content threonine ceramic membrane dislysate, to solve a large amount of low problem containing sour dislysate that the threonine fermentation liquid ceramic membrane filter later stage produces, thereby solved, affect vapo(u)rization system stability and threonine crystal quality problems below; Maximally utilise Threonine Fermentation waste liquid simultaneously, realized and having turned waste into wealth.
To achieve these goals, the present invention is not affecting under ceramic membrane filter flux, mass of dialysate and filtration yield prerequisite, and comprehensive reutilization is low containing sour dislysate.Its key technology is after the zymotic fluid that the ceramic membrane later stage filters is diluted with water, and collects dislysate below 2 ° of B é in recycling can, and is back to the next group ceramic membrane filter later stage for diluting zymotic fluid.
Concrete operation step of the present invention is as follows:
A method of recycling low content threonine ceramic membrane dislysate, comprises the steps:
1) first threonine fermentation liquid ceramic membrane filter, when concentrate volume is during to the 1/6-1/7 of fermentating liquid volume, to the clear water dilution that accounts for fermentating liquid volume 30% that adds 60 ℃ in concentrate; Every sampling in 10 minutes, survey the Baume degrees of dislysate, when the Baume degrees of dislysate is during lower than 2 ° of B é, collect dislysate in recycling can, every batch of collection accounts for the dislysate of fermentating liquid volume 20%; When concentrate containing acid lower than 2% time, stop filtering, collect concentrate, and carry out cleaning ceramic film; Ceramic membrane is inorganic ceramic membrane, and molecular cut off is 2000MW, and micro-filtration temperature is 60 ℃;
2) then carry out second batch threonine fermentation liquid ceramic membrane filter, solution to be concentrated volume during to the 1/6-1/7 of fermentating liquid volume, first adds the dislysate of first collection to dilute in concentrate, and addition is 20% of second batch fermentating liquid volume; Continue to filter, when flux declines when very fast, then dilute to adding 60 ℃ of clear water in concentrate, the volume that adds clear water is 10% of second batch fermentating liquid volume, continues to filter.Every sampling in 10 minutes, survey the Baume degrees of dislysate, when Baume degrees is during lower than 2 ° of B é, collect dislysate in recycling can.According to above step cycle, recycle the dislysate lower than 2 ° of B é; Wherein, ceramic membrane is inorganic ceramic membrane, and molecular cut off is 2000MW, and filtration temperature is 60 ℃;
3) in the concentrate that step 1) obtains, add that to account for concentrate quality be 1/2nd bean dregs, with the NaOH of 1M, regulate pH value 13, be slowly heated to 80 ℃, then stir hydrolysis 30 minutes, finally add the hydrochloric acid tune pH to 7.5 of 1M; Then slowly add corn flour, fishbone dust, vinasse, interpolation limit, limit is stirred to pasty state; Finally pass into steam and be warming up to 105 ℃, distill 10 minutes; Wherein the mass ratio of corn flour, fishbone dust, vinasse and bean dregs is 2:1:3:10;
4) distillation step 3) being obtained adds zinc sulfate and compound bacteria after drying, pulverizing, and mixes, and obtains powdery nutrient fodder; Compound bacteria is mixed according to the mass ratio of 1:1 by Bacillus acidi lactici and saccharomycete; Wherein the mass ratio of zinc sulfate, compound bacteria and step (2) bean dregs is 1:1:100.
The main following points of beneficial effect that the present invention obtains:
1) the present invention is not affecting under ceramic membrane filter flux, mass of dialysate and filtration yield prerequisite, and a collection of zymotic fluid of the every filtration of ceramic membrane system can be saved the clear water of zymotic fluid 20% volume; Saved the cost of steam consumption and ceramic membrane operation when clear water is warming up to the filtration temperature of 60 ℃ simultaneously;
2) every batch of the evaporization process that the present invention is postorder has reduced the dislysate below 2 ° of B é of zymotic fluid 20% volume, be of value to vapo(u)rization system steadily and the stablizing of crystalline quality; The consumption of simultaneously having saved the steam water power that evaporates 2 ° of following dislysates of B é, has reduced production run cost;
3) the present invention has also reduced the discharge of sewage accordingly, has saved the cost of sewage disposal;
4) the present invention also provides a kind of method that effluent resource utilizes, and when effectively administering pollutant, turns waste into wealth, and produces the high-protein nutrient feed that is rich in threonine; The present invention, in feed preparation process, carries out certain hydrolysis to mycoprotein, and the small molecular protein after hydrolysis is more conducive to animal and absorbs; Feed adds after corn, fishbone dust, vinasse, carries out high temperature distillation, dispelling abnormal flavor in the time of sterilizing, and the feed taste of acquisition is pure, and smell is fragrant and sweet.
5) the present invention has added and appropriate trace element and microbial inoculum, has reduced the illness rate of piglet, has greatly improved the death rate.Nutrient fodder cost prepared by the present invention is lower, and piglet body weight increases and survival rate is obviously better than pig starter feed conventional on market.
the specific embodiment
Below employing specific embodiment is further explained the present invention, but should regard the restriction to initiative spirit of the present invention as.
Embodiment 1
A method of recycling low content threonine ceramic membrane dislysate, comprises the steps:
1) first threonine fermentation liquid ceramic membrane filter, when concentrate volume is during to the 1/6-1/7 of fermentating liquid volume, now membrane flux decline is very fast, in order to continue to filter out the threonine in concentrate, in concentrate, adds the clear water that accounts for fermentating liquid volume 30% of 60 ℃ to dilute; Every sampling in 10 minutes, survey the Baume degrees of dislysate, when the Baume degrees of dislysate is during lower than 2 ° of B é, collect dislysate in recycling can, every batch of collection accounts for the dislysate of fermentating liquid volume 20%, when concentrate contains threonine lower than 2%(mass fraction) time, stop filtering, collect concentrate, and carry out cleaning ceramic film; Ceramic membrane is inorganic ceramic membrane, and molecular cut off is 2000MW, and micro-filtration temperature is 60 ℃;
2) then carry out second batch threonine fermentation liquid ceramic membrane filter, solution to be concentrated volume during to the 1/6-1/7 of fermentating liquid volume, first adds the dislysate of first collection to dilute in concentrate, and addition is 20% of second batch fermentating liquid volume; Continue to filter, when flux declines when very fast, then dilute to adding 60 ℃ of clear water in concentrate, the volume that adds clear water is 10% of second batch fermentating liquid volume, continues to filter.Every sampling in 10 minutes, survey the Baume degrees of dislysate, when Baume degrees is during lower than 2 ° of B é, collect dislysate in recycling can.According to above step cycle, recycle the dislysate lower than 2 ° of B é; Ceramic membrane is inorganic ceramic membrane, and molecular cut off is 2000MW, and micro-filtration temperature is 60 ℃;
3) in the concentrate of above-mentioned acquisition, add that to account for concentrate quality be 1/2nd bean dregs, with the NaOH of 1M, regulate pH value 13, be slowly heated to 80 ℃, then stir hydrolysis 30 minutes, finally add the hydrochloric acid tune pH to 7.5 of 1M; Then slowly add corn flour, fishbone dust, vinasse, interpolation limit, limit is stirred to pasty state; Finally pass into steam and be warming up to 105 ℃, distill 10 minutes; Wherein the mass ratio of corn flour, fishbone dust, vinasse and bean dregs is 2:1:3:10;
4) distillation step 3) being obtained adds zinc sulfate and compound bacteria after drying, pulverizing, and mixes, and obtains powdery nutrient fodder; Compound bacteria is mixed according to the mass ratio of 1:1 by Bacillus acidi lactici and saccharomycete; Wherein the mass ratio of zinc sulfate, compound bacteria and step (2) bean dregs is 1:1:100.
Bacillus acidi lactici and saccharomycete reach 2.0-5.0 * 10 according to normal fermentation training method to viable count in product
8individual/gram.
After testing, this nutrient fodder protein content 40.2%, inorganic mineral content 5.6%, threonine content 2.9%, all the other are starch, glucide and other amino acid on a small quantity.
According to above-described embodiment 1, Economic and Efficiency Analysis is as follows:
Neimenggu Fufeng Biotechnologies Co., Ltd produces 1.2 ten thousand tons of threonines per year, adopts after the present invention, saves every year 32000 cubic metres of rinse dosages, and steam saving consumes 30000 tons, saves 200,000 degree electricity, annual cost-saving 1,500,000 yuan.In addition, also reduce sewage discharge, saved the cost of sewage disposal.
Embodiment 2
The culture experiment of the nutrient fodder of embodiment 1 preparation
Choose 100 of month large weanling pigs, be divided into two groups, 50 every group, the feed that wherein experimental group is prepared with the present invention is raised, approximately 250 yuan of every 50kg, and honest feed for control group (SSB-25 model), according to the about 300 yuan of calculating of every 50kg.Raise and detect indices referring to table 1 afterwards in 6 weeks.
Table 1
| Index (every piglet) | Control group | Of the present invention group |
| Weanling pig body weight (kg) | 5.65 | 5.49 |
| Within 6 weeks, put on weight (kg) | 13.43 | 15.21 |
| Survive number | 42 | 48 |
| Consume feed (kg) | 17.1 | 16.4 |
| Feed for nursing cost (unit) | 102.6 | 82 |
By above-mentioned contrast experiment, find, utilize the nutrient fodder cost of the embodiment of the present invention 1 preparation lower, piglet body weight increases and survival rate is obviously better than pig starter feed conventional on market.
Finally, it is also to be noted that, what more than enumerate is only several specific embodiments of the present invention.Obviously, the invention is not restricted to above embodiment, can also have many distortion.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention, all should think protection scope of the present invention.
Claims (1)
1. a method of recycling low content threonine ceramic membrane dislysate, comprises the steps:
1) first threonine fermentation liquid ceramic membrane filter, when concentrate volume is during to the 1/6-1/7 of fermentating liquid volume, to the clear water dilution that accounts for fermentating liquid volume 30% that adds 60 ℃ in concentrate; Every sampling in 10 minutes, survey the Baume degrees of dislysate, when the Baume degrees of dislysate is during lower than 2 ° of B é, collect dislysate in recycling can, every batch of collection accounts for the dislysate of fermentating liquid volume 20%; When concentrate containing acid lower than 2% time, stop filtering, collect concentrate, and carry out cleaning ceramic film;
2) then carry out second batch threonine fermentation liquid ceramic membrane filter, solution to be concentrated volume during to the 1/6-1/7 of fermentating liquid volume, first adds the dislysate of first collection to dilute in concentrate, and addition is 20% of second batch fermentating liquid volume; Continue to filter, when flux declines when very fast, then dilute to adding 60 ℃ of clear water in concentrate, the volume that adds clear water is 10% of second batch fermentating liquid volume, continues to filter; Every sampling in 10 minutes, survey the Baume degrees of dislysate, when Baume degrees is during lower than 2 ° of B é, collect dislysate in recycling can; According to above step cycle, recycle the dislysate lower than 2 ° of B é;
3) in the concentrate that step 1) obtains, add that to account for concentrate quality be 1/2nd bean dregs, with the NaOH of 1M, regulate pH value 13, be slowly heated to 80 ℃, then stir hydrolysis 30 minutes, finally add the hydrochloric acid tune pH to 7.5 of 1M; Then slowly add corn flour, fishbone dust, vinasse, interpolation limit, limit is stirred to pasty state; Finally pass into steam and be warming up to 105 ℃, distill 10 minutes; Wherein the mass ratio of corn flour, fishbone dust, vinasse and bean dregs is 2:1:3:10;
4) distillation step 3) being obtained adds zinc sulfate and compound bacteria after drying, pulverizing, and mixes, and obtains powdery nutrient fodder; Wherein the mass ratio of zinc sulfate, compound bacteria and step (3) bean dregs is 1:1:100.
2. the method for claim 1, is characterized in that, described step 1) and step 2) in the ceramic membrane that uses be inorganic ceramic membrane, molecular cut off is 2000MW, filtration temperature is 60 ℃.
3. the method for claim 1, is characterized in that, the compound bacteria in described step 4) is mixed according to the mass ratio of 1:1 by Bacillus acidi lactici and saccharomycete.
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| CN104222704B (en) * | 2014-10-16 | 2016-05-25 | 内蒙古阜丰生物科技有限公司 | A kind of feed prepared by Threonine Fermentation discarded object and preparation method thereof that utilizes |
| CN104351465B (en) * | 2014-10-21 | 2017-07-04 | 呼伦贝尔东北阜丰生物科技有限公司 | A kind of threonine mycoprotein Application way |
| CN109096130A (en) * | 2018-09-13 | 2018-12-28 | 安徽固德生物工程有限公司 | A method of L-threonine is extracted and refined from L-threonine fermentation liquid |
| CN114057568B (en) * | 2020-07-29 | 2024-04-19 | 三达膜科技（厦门）有限公司 | Method for recycling dilute acetic acid water discharged from main device in production of refined terephthalic acid |
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| US20050181095A1 (en) * | 2004-02-18 | 2005-08-18 | Dominion Nutrition, Inc. | Concentrated-protein food product and process |
| CN101456822B (en) * | 2008-11-28 | 2012-07-25 | 山东恩贝生物工程有限公司 | Novel process for extracting threonine |
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