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1147results about How to "Reduce incubation time" patented technology

Method for fermentation-membrane separation combined production of long-chain dicarboxylic acid

The invention discloses a method for fermentation-membrane separation combined production of long-chain dicarboxylic acid and especially relates to a method for high yield production of dodecanedioic acid (DC12). The method comprises introducing a Candida viswanathii culture seed liquid into a liquid fermentation medium mixed solution which contains 5-40% (v/v) of C10-C18 n-alkane and 95-60% (v/v) of saccharic multielement substrate as a growth carbon source and has pH of 5.0-8.5, carrying out culture on the mixed solution under conditions of a temperature of 24-40 DEG C and ventilatory capacity of 0.1-3.0vvm for 42-194h, starting a fermentation-membrane separation combined device, returning the cells separated by the combined device into a fermentation cylinder, feeding the permeate liquid separated by the combined device into an extraction unit, preparing long-chain dicarboxylic acid, simultaneously, supplying a medium into the fermentation cylinder and carrying out fermentation. In n-dodecane transformation production of DC12, the method has an acid yield of 250g/L and an acid production rate of more than 1.6g/h.L, improves microbial density in fermentation, shortens a fermentation period, improves dicarboxylic acid production intensity and returns the unused n-dodecane into the fermentation unit.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Bio-enzyme and microorganism containing compound feed additive and preparation process thereof

The invention discloses a bio-enzyme and microorganism containing compound feed additive and a preparation process thereof, which solve the problems of high production cost and less viable count of beneficial microorganisms in the prior art. The bio-enzyme and microorganism containing compound feed additive is characterized in that the additive is prepared by compounding a viable organism preparation (prepared by carrying out liquid fermentation and low-temperature drying on bacillus subtilis and brewer's yeast) with an enzyme preparation (prepared by carrying out solid fermentation and drying on trichoderma reesei and Aspergillus niger); and the viable count of beneficial microorganisms in each gram of the product is greater than 8*10<9> cfu/g, the cellulase activity (refer to the quantity of cellulose degraded by each gram of the product per minute) is greater than 500 mg, the alpha-amylase activity (refer to the quantity of starch hydrolyzed by each gram of the product per minute) is greater than 3000 mg, and the protease activity (refer to the mount of an amino acid generated by caseins hydrolyzed by each gram of the product per minute) is greater than 400 mg. The bio-enzyme and microorganism containing compound feed additive disclosed by the invention has the advantages that: the feed utilization rate of livestock can be improved in a short term, the intestinal digestive flora of livestock is improved and balanced, the breeding cost is reduced, and the feed conversion rate and the animal production performance are improved; and meanwhile, the additive is simple in preparation process, low in production cost, and suitable for industrialized production.
Owner:LIAONING SHENNONG BIOLOGICAL ENG

Submerged fermentation culture method of straw mushroom liquid strain and culture medium thereof

InactiveCN101699969ASolve the technical problem of homogenization of strains for inoculationSolve the technical problems of homogenizationOrganic fertilisersHorticulturePropagation timeSubmerged fermentation
The invention relates to a submerged fermentation culture method of straw mushroom liquid strains and culture mediums thereof. The invention solves the technical defects of the prior art, such as long mother species propagation time, poor hypha quality, long fungus ball production time, different fungus ball sizes, higher production cost and the like. The method is used for the submerged fermentation culture of the straw mushroom liquid strains. The method comprises the following steps: 1. carrying out mother species culture in a special culture medium of straw mushroom mother species; 2. carrying out transition culture in a special culture medium of straw mushroom stocks; 3. homogenizing the stocks to obtain homogeneous succulent strains; 4. carrying out primary shaking culture and amplification in a shaking liquid culture medium; 5. carrying out secondary shaking culture and amplification; and 6. carrying out fermentation treatment in a submerged fermentation liquid culture medium to obtain the finished products of the straw mushroom liquid strains. The invention relates to the special culture medium of straw mushroom mother species, the special culture medium of straw mushroom stocks, the shaking liquid culture medium and the submerged fermentation liquid culture medium.
Owner:张纪明

Aerobic granular sludge culture method suitable to low-concentration domestic sewage

The invention discloses an aerobic granular sludge culture method suitable to low-concentration domestic sewage, belonging to the field of environmental protection and resource comprehensive-water pollution prevention and control technology. The method comprises two stages of material supplement operation and low-load operation and particularly includes the following steps of: firstly, inoculating flocculent active sludge to an aerobic granular sludge culture reactor, and then supplementing and adding an easily degradable carbon source to low-concentration domestic sewage to adjust inflow COD(Chemical Oxygen Demand) to be 600-800mg/L; culturing active sludge in an inflowing-aerating-precipitating-water draining sequential operation mode into semi-cultured or completely-cultured aerobic granular sludge; and then keeping culturing with the low-concentration domestic sewage; and finally carrying out low-load acclimation and culture on aerobic granules in an inflowing-aerating-precipitating-standing-water draining sequential operation mode. The sludge granules have large size and high removal rate up to 90% to COD in the low-concentration domestic sewage, as well as high ammonia and nitrogen removal rate of more than 93%.
Owner:BEIJING NORMAL UNIVERSITY

Bacillus amyloliquefaciens D2WM as well as preparation method and application of bacillus amyloliquefaciens D2WM

The invention discloses a bacillus amyloliquefaciens D2WM as well as a preparation method and application of bacillus amyloliquefaciens D2WM. The bacillus amyloliquefaciens D2WM comprises the steps of A, bacillus separation and purification, namely collecting after inoculating a slope; B, preliminary screening of bacillus, namely sequentially selecting strains having antagonistic effects on Erwinia and camellia oleifera diseases by using a point connection method and a plate confrontation method; and C, secondary screening of bacillus, namely culturing the preliminarily-screened strains with the antagonistic effects in an LB liquid culture medium by using a cup-plate method, and screening the strains simultaneously having the antagonistic effects on main diseases of Erwinia and camellia oleifera through an antagonistic bacterium fermentation liquid and sterile filtrate. When being applied to preparation of drugs for treating or preventing soft rot of vegetables and camellia oleifera diseases, the bacillus amyloliquefaciens has a broad-spectrum antagonistic effect, high in growth speed, capable of efficiently antagonizing anthracnose of camellia oleifera, leaf spot diseases of camellia oleifera, black spot of camellia oleifera, canker of camellia oleifera and various diseases and remarkable in antibacterial effect, the culture time for general bacteria and fungi is greatly shortened, and the production cost is reduced.
Owner:HUBEI ENG UNIV

Method for producing long-chain binary acid through fermentation separation coupling

The invention discloses a method for producing long-chain binary acid through fermentation separation coupling, in particular to a method of high-yield dodecanedioic acid (DC12). According to the technical scheme, the method includes the steps that candida viswanathii is cultivated into a seed solution which is led into 5-40% (v/v) n-alkane and 60-95% (v/v) liquid fermentation medium mixture, wherein the pH of the n-alkane ranges from 5.0 to 8.5, and 10 to 18 carbon atoms are contained in the n-alkane; a saccharic multielement substrate serves as a growth carbon source of the liquid fermentation medium mixture; mixing liquid is cultivated for 42 h to 194 h under the conditions that the temperature ranges from 24 DEG C to 40 DEG C, and the air passing amount ranges from 0.1 vvm to 3.0 vvm, a centrifugal fermentation separation coupling device or a plate frame filtering fermentation separation coupling device is started, cells passing through the separation coupling device are circulated back to a fermentation cylinder, and clear liquid passing through the separation coupling device enters an extraction link to prepare long-chain binary acid; and meanwhile the fermentation process is continuously carried out on a cultivation medium in a fermentation tank. The method is used for converting n-dodecane so as to produce the DC12, the produced acid reaches 240 g/L, and the acid production rate is larger than 1.5 g/h.L.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
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