CN103113496A - Clean chitosan production technology - Google Patents
Clean chitosan production technology Download PDFInfo
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- CN103113496A CN103113496A CN2013100564419A CN201310056441A CN103113496A CN 103113496 A CN103113496 A CN 103113496A CN 2013100564419 A CN2013100564419 A CN 2013100564419A CN 201310056441 A CN201310056441 A CN 201310056441A CN 103113496 A CN103113496 A CN 103113496A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
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- 229920002101 Chitin Polymers 0.000 claims abstract description 48
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
本发明涉及一种甲壳素的清洁生产工艺，涉及水产品加工废弃物综合利用、食品加工废水处理及综合利用技术领域。本技术采用虾、蟹壳为原料，通过高密度蒸汽闪爆装置对原料进行瞬时高压蒸汽闪爆预处理，通过酶解将原料中大部分蛋白质溶解提取制成食品级水解蛋白；酶解残渣经NaOH、盐酸依次浸泡制得高品质甲壳素；废碱液依次经过保安过滤器、碳化硅材质超滤膜、耐碱NF膜过滤处理，得到饲料级蛋白粉和可回用的稀碱液；酸泡废液经保安过滤器、碳化硅材质超滤膜处理，得到的中性CaCl2澄清废水达标排放。与现有技术相比，本发明整个新工艺清洁、环保，分离纯化工艺简单、合理，工序短，操作方便，同时资源得到了充分地综合利用，避免了二次污染，经济效益显著提高，具有工业化应用价值。
The invention relates to a clean production process of chitin, and relates to the technical fields of comprehensive utilization of aquatic product processing waste, food processing wastewater treatment and comprehensive utilization. This technology uses shrimp and crab shells as raw materials. The raw materials are subjected to instantaneous high-pressure steam flash explosion pretreatment through a high-density steam flash explosion device, and most of the proteins in the raw materials are dissolved and extracted by enzymatic hydrolysis to make food-grade hydrolyzed protein; Soak in NaOH and hydrochloric acid in order to obtain high-quality chitin; the waste lye is filtered through a security filter, a silicon carbide ultrafiltration membrane, and an alkali-resistant NF membrane in sequence to obtain feed-grade protein powder and reusable dilute lye; The bubble waste liquid is treated with a security filter and a silicon carbide ultrafiltration membrane, and the obtained neutral CaCl 2 clarified waste water is discharged up to the standard. Compared with the prior art, the entire new process of the present invention is clean and environmentally friendly, the separation and purification process is simple and reasonable, the process is short, and the operation is convenient. At the same time, resources are fully utilized comprehensively, secondary pollution is avoided, and economic benefits are significantly improved. Industrial application value.
Description
Technical field
The present invention relates to a kind of process for cleanly preparing of chitin, particularly a kind of chitin clearer production technology based on high-density steam explosion technology and membrane separation technique, belong to processing of aquatic products waste ' s reclamation, food processing wastewater processing and comprehensive utilization technique field.
Background technology
Chitin is the important source material of medicine, food service industry, and industrial is all generally to adopt the shell of the crustaceans biologies such as shrimp, crab as raw material, carries out deproteinated and sour decalcification technique by biological process or chemical method, the raw materials for production chitin.Because its course of processing produces a large amount of waste water, in a lot of national production, be restricted in recent years, apparent availability sharply descends, and supply falls short of demand in market, and price raises gradually.The chitin source mill of at present upper scale, mainly adopt traditional soda acid explained hereafter chitin, produces a large amount of waste water.Owing to containing a large amount of protein, acid, alkali, calcium etc. in waste water, its wastewater treatment difficulty is quite large, on the other hand, a large amount of protein in waste water, the residual useful compositions such as alkali have also caused the huge wasting of resources to the suitable height of processing costs in contaminate environment.
The domestic treatment process for chitin plant effluent routine is that spent acid and waste lye are concentrated, after grid, mix, through natural sedimentation, polymerize aluminum chloride or bodied ferric sulfate and polyacrylamide flocculation, means of waste water reuse anaerobism or aerobic process, process again, water outlet COD after administering generally, more than 1000mg/L, can not reach national sewage drainage standard., due in the high density soda acid and the high salinity waste water of rear formation, with general biochemical method, can't be processed, a large amount of manufacturers, because of having no idea to process this type of waste water, is mostly directly to be discharged in environment and to go, the situation severe at all simultaneously.Not only to ecotope, bring causing property destruction, also make these enterprises face the circumstances of closing down simultaneously.
Another subject matter of chitin industrial production wastewater is at present, and traditional wastewater processing technology is only to process, and the callable various useful compositions that contain in waste water, basically consumed in vain, not only wasted resource, and processing costs and difficulty all quite high.Although some researchs about protein in waste water for producing crust element or astaxanthin recovery are also arranged at present both at home and abroad, research is nearly all to rest on laboratory stage, and pays close attention to the processing problem of extracting rear waste water.Can not be recycled residual a large amount of high density spent acid or salkali waste, so raw material consumption is very high, production cost and the wasting of resources are all quite serious.
Chitin waste water is processed, only that terminal is administered, be difficult to realize cleaner production, only have by whole process is optimized to integration, consider every possible angle, cancel or reduce the soda acid consumption, fully extract the main useful resources in raw material, reduce discharge of wastewater, could really reach the pattern of the sustainable health development of cleaner production and green manufacturing.Developed country is because environmental issue has mostly stopped producing chitin at present.Producing the developing countries such as the minority developed country of chitin and India, for the mode of production (decalcification deproteinated) of chitin, to study more be to utilize microbe fermentation method decalcification deproteinated, but decalcification and deproteinated are incomplete, finally also need further to process with acid-base method, just can obtain chitin.For the acidic and alkaline waste water produced, still utilize and processed to domestic similar traditional method, even directly discharge.The waste water of chitin production mixes processing, not only has no idea up to standard, also without any useful component, can recycle, therefore without any future simultaneously.
Carry out the pre-treatment of high-density steam explosion by prawn, crab husk as raw material, make the chitin and protein and the CaCO that combine closely
3short texture is opened even fully, and making enzyme, acid, alkali etc. contact at an easy rate concurrent looks with target substrates should react, and has reduced the energy threshold, has improved reaction efficiency, has reduced the reactant consumption amount.Due to opening of the crystallizing field of chitin, make the solvability of chitin be improved, by chitin further de-acetyl prepare chitosan and become very easy with oligochitosan.By proteolytic enzyme, most proteolysis is become to the soluble proteins hydrolyzate, can collect and obtain the high-quality protolysate of food grade.And the residual shell of removing most of albumen only just can more fully extract residual protein with a small amount of caustic soda, greatly reduced the consumption of alkali.The residual shell of calcic clean and short texture can be with hydrochloric acid soln by CaCO
3removal, and hydrochloric acid consumption fully greatly reduces, and the COD in acid bubble waste water also significantly reduces.Waste lye and decalcification waste liquid that the first soda boiling of chitin production process is produced in acid leaching process are again collected respectively, and reclaim the compositions such as alkali and protein by growing membrane separation technique; General Cleaning Wastewater can be carried out reuse by conventional sewage disposal.It is the effective way that realizes chitin cleaner production and resource high-efficiency comprehensive utilization this purpose.
At present both at home and abroad not about high-density steam explosion technology pre-treatment shrimp, crab shell, and coupled enzymatic technology and the membrane technique report that carries out the chitin cleaner production, inventor herein early stage, authorized patent also only limited to the recycling (ZL200810235932.9) to waste lye by stainless steel membrane and alkaline-resisting nanofiltration membrane, belong to waste water terminal improvement technology, do not belong to process for cleanly preparing.High-density steam explosion technology pretreating raw material, with the raw material imporosity that loosens, is the core key technology of this technique.The SDSFE technology has recently 2 pieces of articles to report in extracting the technology such as soybean protein, feather keratoprotein, to opening the crystallization of protein plot structure, unusual effect is arranged; The quick-fried technology of vapour is more extensive in the fiber papermaking sector application.
In sum, existing chitin production technology environmental disruption is serious, and the treatment process of spent process water is extensive, processing cost is high, intractability is large, can not qualified discharge after processing, and causes ample resources to waste simultaneously, has improved production cost.
Summary of the invention
Purpose of the present invention is exactly to provide in order to overcome the defect that above-mentioned prior art exists that a kind of technique is clean, environmental protection, separation purifying technique is simple, reasonable, operation is short, easy to operate, and resource has obtained the process for cleanly preparing of the chitin of comprehensive utilization fully simultaneously.
Purpose of the present invention can be achieved through the following technical solutions: a kind of process for cleanly preparing of chitin, it is characterized in that, and the method comprises the following steps:
(5) dodge quick-fried: shrimp shell and/or crab shell are arrived to 0.1-10MPa by steam pressurized in the high-density steam explosion device, then moment pressure release, through the instantaneous steam explosion of 0.0875s, make shrimp shell and/or crab shell weave construction loose expanded, the crystallizing field of chitin and protein is opened;
(6) enzymolysis: the shrimp shell and/or the crab shell that dodge after quick-fried are transported in the warm water tank, with the water soaking of 2-10 times of weight and stir, regulate water temperature at 20-60 ℃, add zymin, regulate pH3-11, enzyme digestion reaction 1-12h, 85 ℃ of enzymes that go out, coarse filtration;
(7) albumen reclaims: after the enzyme that goes out, enzymolysis solution coarse filtration liquid is after nanofiltration (NF) or reverse osmosis (RO) are concentrated to 8%-20%, and sterilizing, drying, obtain food grade hydrolyzed animal protein product;
(8) chitin preparation: by the enzymolysis solution filter residue carry out successively soda boiling, the acid bubble obtains the chitin product, described soda boiling is to soak with the NaOH of 7%-10%, temperature 95-100 ℃, 0.5-2h is stirred in air-blowing, bleeds off waste lye, filter residue rinses to neutral with tap water, described acid bubble is the material after soda boiling to be passed into to the salt acid soak 1-12h of 6%-8%, and air-blowing is stirred, and bleeds off spent acid solution, filter residue rinses to neutral, through natural air dry or warm air drying with tap water.
Described shrimp shell and/or crab shell first carried out pre-treatment before dodging quick-fried processing, and described pre-treatment is: by fresh or dry shrimp shell or the coarse reduction of crab shell.
The described zymin of step (2) includes but not limited to Sumizyme MP, stomach en-, papoid, neutral protease, trypsinase is several or the combination of above several enzymes; The addition of zymin is 1 ‰-5% of shrimp shell and/or crab shell dry weight 30%.
The time of the described soda boiling of step (4) is 1～2h preferably, and the temperature of acid bubble is room temperature; The number of times of soda boiling, acid bubble is 1～2 time.
The waste lye that the described alkali cooking process of step (4) produces adopts following methods to process: by waste lye successively after cartridge filter, silicon carbide material ultrafiltration membrance filter, be cooled to below 60 ℃, through alkaline-resisting NF membrane filtration, process again, the spent acid solution neutralization through water-dialyzing dialysis or direct and sour bubble process generation containing protein concentrated solution that each step obtains, drying, obtain feed grade albumen; NF filtrate is the clean sig water of clarification, NaOH concentration 0-4% wherein, recycle.
The spent acid solution that the described sour bubble process of step (4) produces adopts following methods to process: spent acid solution, through cartridge filter, silicon carbide material ultrafiltration membrane treatment, is obtained to high density and merges neutralization, drying containing a small amount of protein concentrated solution and with the waste lye that alkali cooking process produces; Obtain simultaneously containing CaCl
2clarify neutral direct discharging of waste water to waste water treatment plant's harmless treatment.
Effective rete material of the membrane element that described ultra-filtration membrane is used is silicon carbide, and supporting layer is aluminum oxide, and the membrane filtration pore diameter range is 20nm-100nm, filtration temperature 10-100 ℃, working pressure 0.01-0.4MPa, filter type is cross flow filter, Membrane Filtration Flux is 20-400Lm
-1h
-1.
Described NF film is the film system, comprise membrane element, recycle pump, transferpump, electric, instrument, Controlling System, wherein the mould material of membrane element is composite high-molecular material, and membranous type is rolled film, the pH tolerance range of film is 0-14, the molecular weight cut-off scope that the highest tolerance NaOH concentration is 20%, NF film is 90Da-350Da, and the filter operation temperature is 10～60 ℃, working pressure is 0.1～4MPa, filter type is cross flow filter, and the film surface velocity is 0.5～10m/s, and Membrane Filtration Flux is 5～50Lm
-1h
-1, cycles of concentration is 1～40 times.
Compared with prior art, the chitin that technique of the present invention obtains more de-acetyl prepares chitosan and oligochitosan; Can obtain high-quality hydrolyzed animal protein product high value added product, significantly reduce alkali, acid consumption, recycling and the effective constituent comprehensive utilization of alkali waste water have been completed, non-alkali liquor is discharged in environment and goes, acid bubble liquid measure significantly reduces, and in clarified wastewater, COD is reduced to below 50ppm, reaches discharging standards.Whole novel process is clean, environmental protection, and separation purifying technique is simple, reasonable, and operation is short, easy to operate, and resource has obtained comprehensive utilization fully simultaneously, has avoided secondary pollution, and environment protection significance is great, and remarkable in economical benefits improves, and has industrial applications and is worth.
The accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
Take 100Kg shrimp shell and shrimp processing fent is raw material, without coarse reduction, is delivered directly in high-density steam explosion (HDSFE) device, by steam pressurized, arrive 10MPa, and then 0.0875s moment pressure release sudden strain of a muscle is quick-fried; The raw material dodged after quick-fried is delivered to 316L stainless steel reaction tank, with 2 times of (w/w) tap water, soak, be warmed up to 60 ℃, stir and adjust pH to 6.5, add 30g neutral protease (100Kg * 30% * 1 ‰), stirring reaction 12h, 85 ℃ of enzymes that go out, coarse filtration, filtrate is concentrated into 20% through NF or RO film by protein enzymatic hydrolyzate, spraying drying, obtain about 25Kg protolysate powder.Filter residue 7%NaOH solution backheat to 100 ℃, 1h is soaked in air-blowing, discards waste lye, and slag washes with water to neutrality, then stirs and soak 12h with 6% hydrochloric acid normal temperature air-blowing, discards spent acid solution, and pulp water is washed till neutral rear natural air dry drying, obtains chitin 18Kg.Waste lye directly pumps into silicon carbide film systemic circulation tank, directly enter recycle pump add 60 order cartridge filters before or after fresh feed pump after, after providing pressure and certain flow rate, recycle pump enters the silicon carbide film element, feed temperature is 90 ℃-100 ℃, working pressure is 0.3-0.4MPa, and the film surface velocity is 2-5m/s, and the film mean pore size is 20nm, film average flux 400LMH, concentrated 50 times are finished afterwards.Filtrate cools to 50-60 ℃ through interchanger, pump into nanofiltration system by recycle pump, working pressure 3.5-4MPa, surface velocity 10m/s, retaining molecular weight 90Da, concentrated 40 times of end, film average flux 50LMH, concentrated solution adds 3 times of deionized water classification dialysis of himself volume, and dialyzate is incorporated to NF diluted alkaline filtrate, the concentrated solution spray is dry, obtains 4.5Kg feed grade protein powder; The sig water clear, NaOH concentration 2.4%, COD<50ppm, collect reuse; Acid bubble waste water directly pumps into silicon carbide film systemic circulation tank, directly enter recycle pump add 60 order cartridge filters before or after fresh feed pump after, after providing pressure and certain flow rate, recycle pump enters the silicon carbide film element, feed temperature is 20 ℃-50 ℃, working pressure is 0.1MPa, the film surface velocity is 2-5m/s, the film mean pore size is 20nm, film average flux 200LMH, concentrated 50 times are finished afterwards, liquor C OD<50ppm, directly discharge or be incorporated to municipal wastewater and process pipe network, containing protein concentrated solution and the complete also processing of salkali waste concentrated solution.
Described HDSFE device is that instant steam dodges quick-fried device, is core technology of the present invention; The silicon carbide film element is tubular structure, comprises film supporting layer, rete, and the material of described film supporting layer is aluminum oxide, and the material of rete is silicon carbide, and the film mean pore size is 20nm; Described nanofiltration membrane is rolling composite high-molecular material film, and molecular weight cut-off 90Da, can tolerate the 20%NaOH alkali concn.
Embodiment 2
100Kg Alaska cod crab shell of take is raw material, after coarse reduction, is transported in the HDSFE device, by steam pressurized, arrives 2MPa, and then 0.0875s moment pressure release is dodged quick-fried; The raw material dodged after quick-fried is delivered to 316L stainless steel reaction tank, with 10 times of (w/w) tap water, soak, be warmed up to 40 ℃, stir and adjust pH to 11, add 1.5Kg Sumizyme MP (100Kg * 30% * 5%), stirring reaction 4h, 85 ℃ of enzymes that go out, coarse filtration, filtrate is concentrated into 8% through NF or RO film by protein enzymatic hydrolyzate, spraying drying, obtain about 28Kg protolysate powder.Filter residue 10%NaOH solution backheat to 95 ℃, 0.5h is soaked in air-blowing, discards waste lye, and slag washes with water to neutrality, then stirs and soak 1h with 8% hydrochloric acid normal temperature air-blowing, discards spent acid solution, and pulp water is washed till neutral rear natural air dry drying, obtains chitin 18.5Kg.Waste lye directly pumps into silicon carbide film systemic circulation tank, directly enter recycle pump add 60 order cartridge filters before or after fresh feed pump after, after providing pressure and certain flow rate, recycle pump enters the silicon carbide film element, feed temperature is 10 ℃, working pressure is 0.01MPa, and the film surface velocity is 2m/s, and the film mean pore size is 100nm, film average flux 20LMH, concentrated 30 times are finished afterwards.10 ℃ of filtrate temperature, pump into nanofiltration system by recycle pump, working pressure 0.1MPa, surface velocity 0.5m/s, retaining molecular weight 350Da, concentrated 1 times of end, film average flux 5LMH, concentrated solution and acid bubble wastewater membrane concentrated solution merge neutralization, spray is dry, obtains 6Kg feed grade protein powder; The sig water clear, NaOH concentration 3.5%, COD<50ppm, collect reuse; Acid bubble waste water directly pumps into silicon carbide film systemic circulation tank, directly enter recycle pump add 60 order cartridge filters before or after fresh feed pump after, after providing pressure and certain flow rate, recycle pump enters the silicon carbide film element, feed temperature is 10 ℃, working pressure is 0.4MPa, the film surface velocity is 2-5m/s, the film mean pore size is 20nm, film average flux 20LMH, concentrated 50 times are finished afterwards, liquor C OD<50ppm, directly discharge or be incorporated to municipal wastewater and process pipe network, containing protein concentrated solution and the complete also processing of salkali waste concentrated solution.
Described HDSFE device is that instant steam dodges quick-fried device, is core technology of the present invention; The silicon carbide film element is tubular structure, comprises film supporting layer, rete, and the material of described film supporting layer is aluminum oxide, and the material of rete is silicon carbide, and the film mean pore size is 20nm and 100nm; Described nanofiltration membrane is rolling composite high-molecular material film, and molecular weight cut-off 350Da, can tolerate the 20%NaOH alkali concn.
Embodiment 3
The 100Kg small lobsters shell of take is raw material, after coarse reduction, is transported in the HDSFE device, by steam pressurized, arrives 4MPa, and then 0.0875s moment pressure release is dodged quick-fried; The raw material dodged after quick-fried is delivered to 316L stainless steel reaction tank, with 5 times of (w/w) tap water, soak, 10 ℃ of temperature, stir and adjust pH to 3, adds 0.3Kg compound protease (containing papoid, trypsinase, stomach en-) (100Kg * 30% * 1%), stirring reaction 1h, 85 ℃ of enzymes that go out, coarse filtration, filtrate is concentrated into 18% through NF or RO film by protein enzymatic hydrolyzate, spraying drying, obtain about 26Kg protolysate powder.7%NaOH solution backheat to 95 ℃ for filter residue, 2h is soaked in air-blowing, discard waste lye, slag washes with water to neutrality, then stirs and soak 12h with 8% hydrochloric acid normal temperature air-blowing, discards spent acid solution, after pulp water is washed till neutrality, repeat alkali, acid bubble 1 time, pulp water is washed till neutral rear natural air dry drying, obtains chitin 15Kg.Waste lye directly pumps into silicon carbide film systemic circulation tank, directly enter recycle pump add 60 order cartridge filters before or after fresh feed pump after, after providing pressure and certain flow rate, recycle pump enters the silicon carbide film element, feed temperature is 90 ℃, working pressure is 0.1-0.25MPa, and the film surface velocity is 5m/s, and the film mean pore size is 40nm, film average flux 200LMH, concentrated 50 times are finished afterwards.The filtrate heat exchange is cooled to 40 ℃, by recycle pump, pumps into nanofiltration system, working pressure 3MPa, surface velocity 3.5m/s, retaining molecular weight 150Da, concentrated 25 times of end, film average flux 15LMH, concentrated solution and acid bubble wastewater membrane concentrated solution merge neutralization, spray is dry, obtains 4Kg feed grade protein powder; The sig water clear, NaOH concentration 1.8%, COD<50ppm, collect reuse; Acid bubble waste water directly pumps into silicon carbide film systemic circulation tank, directly enter recycle pump add 60 order cartridge filters before or after fresh feed pump after, after providing pressure and certain flow rate, recycle pump enters the silicon carbide film element, feed temperature is 30 ℃, working pressure is 0.2MPa, the film surface velocity is 2-5m/s, the film mean pore size is 40nm, film average flux 260LMH, concentrated 50 times are finished afterwards, liquor C OD<50ppm, directly discharge or be incorporated to municipal wastewater and process pipe network, containing protein concentrated solution and the complete also processing of salkali waste concentrated solution.
Described HDSFE device is that instant steam dodges quick-fried device, is core technology of the present invention; The silicon carbide film element is tubular structure, comprises film supporting layer, rete, and the material of described film supporting layer is aluminum oxide, and the material of rete is silicon carbide, and the film mean pore size is 40nm; Described nanofiltration membrane is rolling composite high-molecular material film, and molecular weight cut-off 150Da, can tolerate the 20%NaOH alkali concn.
Embodiment 4
100Kg Alaska cod crab shell of take is raw material, without coarse reduction, is delivered directly in the HDSFE device, by steam pressurized, arrives 0.1MPa, and then 0.0875s moment pressure release is dodged quick-fried; The raw material dodged after quick-fried is delivered to 316L stainless steel reaction tank, with 5 times of (w/w) tap water, soak, temperature 45 C, stir and adjust pH to 5.5, adds 90g compound protease (containing neutral protease, trypsinase, stomach en-) (100Kg * 30% * 3 ‰), stirring reaction 6h, 85 ℃ of enzymes that go out, coarse filtration, filtrate is concentrated into 20% through NF or RO film by protein enzymatic hydrolyzate, spraying drying, obtain about 28Kg protolysate powder.Filter residue 7%NaOH solution backheat to 95 ℃, 1h is soaked in air-blowing, discards waste lye, and slag washes with water to neutrality, then stirs and soak 8h with 6% hydrochloric acid normal temperature air-blowing, discards spent acid solution, and pulp water is washed till neutral rear natural air dry drying, obtains chitin 18Kg.Waste lye directly pumps into silicon carbide film systemic circulation tank, directly enter recycle pump add 60 order cartridge filters before or after fresh feed pump after, after providing pressure and certain flow rate, recycle pump enters the silicon carbide film element, feed temperature is 90 ℃, working pressure is 0.1-0.25MPa, and the film surface velocity is 5m/s, and the film mean pore size is 40nm, film average flux 200LMH, concentrated 50 times are finished afterwards.The filtrate heat exchange is cooled to 60 ℃, pump into nanofiltration system by recycle pump, working pressure 3.5MPa, surface velocity 3.5m/s, retaining molecular weight 90Da, concentrated 20 times of end, film average flux 18LMH, concentrated solution adds the dialysis of 3 times of deionized waters of its volume, and water-dialyzing merges to reuse in NF filtrate, the concentrated solution spray dry 2Kg feed grade protein powder; The sig water clear, NaOH concentration 1.4%, COD<50ppm, collect reuse; Acid bubble waste water directly pumps into silicon carbide film systemic circulation tank, directly enter recycle pump add 60 order cartridge filters before or after fresh feed pump after, after providing pressure and certain flow rate, recycle pump enters the silicon carbide film element, feed temperature is 20 ℃, working pressure is 0.4MPa, the film surface velocity is 2-5m/s, the film mean pore size is 40nm, film average flux 180LMH, concentrated 50 times are finished afterwards, liquor C OD<50ppm, directly discharge or be incorporated to municipal wastewater and process pipe network, containing protein concentrated solution and the complete also processing of salkali waste concentrated solution.
Described HDSFE device is that instant steam dodges quick-fried device, is core technology of the present invention; The silicon carbide film element is tubular structure, comprises film supporting layer, rete, and the material of described film supporting layer is aluminum oxide, and the material of rete is silicon carbide, and the film mean pore size is 40nm; Described nanofiltration membrane is rolling composite high-molecular material film, and molecular weight cut-off 90Da, can tolerate the 20%NaOH alkali concn.
Chitin clearer production technology of the present invention, the HDSFE pre-treatment is the core key point of whole technique, makes simple, remarkably productive; The chitin obtained more de-acetyl prepares chitosan and oligochitosan; Proteolysate quality prepared by enzymolysis is high, remarkable in economical benefits; Separation purifying technique is simple, reasonable, and unit operation is convenient, and the alkali lye that separation obtains is clean, purity is high, the rate of recovery is high; Use silicon carbide film separation system one-time investment cost low, membrane lifetime is long, has that running cost is low, filtering accuracy is high, cycles of concentration is high, concentrated solution concentration advantages of higher; The nanofiltration membrane of using has alkaline resistance properties and physical strength well, and membrane lifetime is long, and running cost is low, and separation accuracy is very high, and cycles of concentration is high, and concentrated solution concentration is high, is conducive to concentrated solution and solidifies recycling.Technical characterstic of the present invention is green manufacturing, the cleaner production of whole process, only solved in the past can end treatment wretched insufficiency.
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| CN103755834A (en) * | 2014-01-26 | 2014-04-30 | 扬州日兴生物科技股份有限公司 | Methods for preparing active peptide powders and chitins from shrimp and crab by-products |
| CN103936884A (en) * | 2014-04-18 | 2014-07-23 | 广西还珠海洋生物科技有限公司 | Method for extracting chitin from shrimp and crab shells |
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| CN110859213A (en) * | 2019-12-25 | 2020-03-06 | 好当家集团有限公司 | Separation method of Peru squid sucker ring teeth |
| CN110859212A (en) * | 2019-12-25 | 2020-03-06 | 山东人和集团有限公司 | Physical method for removing ring teeth of sucker of Peru squid |
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