59results about How to "Improve acid production efficiency" patented technology

The invention discloses a method for producing short-chain volatile fatty acids by utilizing kitchen wastes and the short-chain volatile fatty acids. The method specifically comprises the following steps: uniformly mixing and stirring the kitchen wastes serving as a fermentation substrate and sludge serving as an inoculum, thereby obtaining a fermentation matrix; and adding alkyl polyglucosides into the fermentation matrix, and performing anaerobic fermentation under a stirring condition. The reduction, recycling and innocent treatment of the kitchen wastes are realized, and the method has the advantages of low operating cost, high profit, high yield of the short-chain volatile fatty acids and the like.

The invention discloses a device and method for enhancing the reduction of denitrified coupling sludge in urban sewage by using intra-sludge carbon sources by two stages of sequencing batch reactors (SBR), belonging to the field of low C / N ratio(mole ratio) urban sewage treatment and excess sludge biochemical treatment. The device disclosed by the invention mainly comprises a SBR1, a SBR2 and a sequencing batch excess sludge fermentation reactor (SBRF). According to the invention, an excess sludge fermentation mixture is taken as a carbon source of SBR1 denitrification, so that biological denitrification is enhanced, and excess sludge is further reduced; deep denitrification is realized by taking excess sludge fermented liquid as a carbon source of SBR2 denitrification, so that discharged water can reach the level-A standard. According to the invention, an anaerobic biological treatment technology and an aerobic biological treatment technology are coupled so as to achieve the purposes of optimally controlling low C / N ratio (mole ratio) urban sewage treatment, saving carbon sources, improving the utilization rate of carbon sources, and reducing the yield of excess sludge. In addition, the device and method disclosed by the invention have the advantages of simple equipment, flexible operation, and the like.

The invention belongs to the technical field of biochemical engineering and particularly relates to a method for preparing medical grade valine through fermentation. The method comprises the followingsteps: fermenting, filtering and concentrating to prepare coarse valine; performing primary acid dissolution on the coarse valine by adopting hydrochloric acid, cooling, crystallizing and centrifuging to obtain the valine solid and mother solution; performing secondary acid dissolution on the valine solid with hydrochloric acid, cooling, crystallizing and centrifuging to obtain the valine solid and mother solution again; dissolving the obtained valine solids with water by adopting distilled water, performing ion exchange, discoloration, refined filtration and crystallization, so as to obtainthe medical grade valine. According to the method disclosed by the invention, the fermentation efficiency is high, heteroacid can be effectively removed, the product quality is greatly improved, and the medical grade standard is reached.

The invention provides a method for preparing industrial sulfuric acid by using sulfur-containing waste liquid, and belongs to the field of industrial wastewater treatment. The method comprises the following steps: mixing sulfur-containing waste liquid generated by ammonia process (HPF process) gas desulfurization, and filtering elemental sulfur by using a filter press to obtain first sulfur slurry and filtered clear liquid; evaporating and concentrating the filtered desulfurization clear liquid into second sulfur slurry, mixing the first sulfur slurry and the second sulfur slurry of the sulfur slurry into thick slurry, and sending the thick slurry to a drying section; and in the drying section, taking inert gas as a medium in a closed circulating drying mode, and treating thick sulfur slurry to obtain crude sulfur powder. The crude sulfur is fed into a sulfur burning furnace, and the crude sulfur and oxygen-enriched air are burnt into SO2 flue gas, through temperature reduction and dehumidification of the purification process and the dehydration and a drying tower and through two-turn and two-absorption acid manufacturing process, the sulfuric acid product is made, and the environmental protection problem in the drying process is mainly solved, and the ultra-low emission problem of tail gas is solved through energy conservation and emission reduction measures and process control of pretreatment and oxygen-enriched combustion.

The invention discloses a method for preparing a Hami melon vinegar beverage. The method comprises the steps of preparing Hami melon juice, expanding cultivation of active ferment, fermenting Hami melon wine, preparing a direct leavening agent, fermenting Hami melon vinegar and preparing the Hami melon vinegar beverage. The method combines a liquid submerged fermentation technology and a direct fermenting method and has the advantages of being quick in fermenting speed, short in fermenting period, high in raw material utilization ratio and acid producing efficiency and the like. The advantages of the liquid submerged fermentation technology are played to the most extent by controlling diameters including the leavening agent, fermentation liquor ingredients and the like. By adopting the direct leavening agent, the steps of earlier-stage activation, separation and purification, cultivation expanding and the like required by test tube acetic acid strains are omitted, a lag period of the acetic acid strains is shortened, and the overall fermenting process is shortened by more than 60 hours than that of the test tube strains. By controlling the process steps, functional ingredients of Hami melons are fully utilized, special flavor of the Hami melons is retained, and the beverage is gentle in sour, sweet, mellow, tasty and refreshing and enriches the fruit vinegar beverage market.

The invention relates to the technical field of resource converting of organic solid wastes and particularly relates to a method for producing volatile fatty acid (VFA) from mushroom cultured residue through alkaline fermentation. The preparation method comprises the following steps: taking the mushroom cultured residue as a fermentation substrate, and taking anaerobically digested sludge as inoculating sludge; carrying out mechanical pulverization on dried mushroom cultured residue, adding distilled water into the powder so as to prepare a mixed solution with the solid content of 12% to 18%, mixing the mixed liquid with the inoculating sludge according to the volume ratio of 5: 1, and introducing nitrogen gas into the mixture for 3 to 5 minutes; controlling the reaction temperature to 35 DEG C and the stirring rate to 120r / min to 180r / min, maintaining the pH of a system to about 10, and carrying out alkaline fermentation on the mushroom cultured residue in an anaerobic environment for 4 to 7 days; carrying out centrifugation on the mixed solution obtained after the alkaline fermentation by adopting a centrifuge at the centrifugal speed of 12,000r / min, so as to obtain centrifugal supernatant, i.e. VFA fermentation liquor. According to the method, the technological operation is simple, anaerobic fermentation conditions are easily controlled, and the economic cost is low, so that the method has a good application prospect. The invention provides a novel method for solving the problem of stacking of the mushroom cultured residue and achieving the resource converting of agricultural wastes and has important significance.

The invention belongs to the technical field of L-isoleucine production and discloses a method of increasing the yield of L-isoleucine. The method comprises the following step of adding H2O2 and a glucose nutrient solution. In the method, by optimizing a fermentation method, the yield of L-isoleucine is increased.

The invention discloses weissella cibaria as well as application and a screening inspection method thereof. The weissella cibaria is preserved in CGMCC (China General Microbiological Culture Collection Center), and has the preservation number of CGMCC No.15075. The weissella cibaria has the advantages that the growth speed is high; the acid producing efficiency is high; the weissella cibaria can improve the quality of forage grass silage through being used as forage grass silage additives, and has wide application prospects.

The invention belongs to the technical field of monosodium glutamate preparation, and discloses an environment-friendly process for preparing monosodium glutamate. The process includes the following steps: step (1) preparing a glutamic acid fermentation liquid; step (2) reusing strains; and step (3) preparing the monosodium glutamate. According to the method, the yield of the monosodium glutamateis improved by preforming acid regeneration on waste thalli.

The invention discloses a method for producing short-chain volatile fatty acid by using tobacco waste. The method concretely comprises the following steps: stirring and evenly mixing the tobacco waste used as a fermentation substrate with sludge used as an inoculant so as to obtain a fermentation substrate; adding alkyl polyglycoside into the fermentation substrate, and carrying out anaerobic fermentation under the condition of stirring. The method can realize reduction, resource and harmless treatment, and has the advantages of being low in running cost, high in earnings, high in yield of the short-chain volatile fatty acid, and the like.

The invention discloses a method for producing lactic acid by the fermentation of acorn powder. In the invention, a certain amount of acorn powder with low tannin content is used as a carbon source and is hydrolyzed under the action of amylase, the product of the enzymatic hydrolysis is saccharified under the action of saccharifying enzyme, and the product of the saccharification is used for the fermentation production of lactic acid. Compared with the prior art, the method disclosed by the invention uses a non-grain acorn resource as a raw material, reduces production cost, and can create high economic benefit. And the method improves the utilization rate of acorn resource and has a bright application prospect.

The invention relates to a graphite block hole type down-firing triad hydrochloric acid synthetic furnace which is characterized by comprising a furnace base fixedly connected to the lower end of a furnace body; the furnace base is sequentially provided with a graphite base, a plurality of graphite block hole monomers, a gas-liquid distribution plate and a graphite furnace top cover, wherein the graphite block hole monomers are provided with a plurality of cooling transverse holes and cooling cavities partitioned by partition plates; the furnace body is internally provided with a gas syntheticcooling absorption section and a gas-liquid mixing chamber; a combined acid diluting pipe is arranged above the gas-liquid distribution plate, and a through hole of the gas-liquid distribution plateis provided with a graphite absorption weir; the gas-liquid mixing chamber, the graphite absorption weir, a vertical hole of the gas-liquid distribution plate, accumulated vertical holes of the plurality of graphite block hole monomers, an acid collection tank of the graphite base and a finished acid outlet are communicated to form a finished acid channel; and a lamp cap is arranged in the centerof the furnace base. The invention has the advantages of compact and reasonable structure, small height, little occupied space, high acid preparation efficiency, low acid discharging temperature, goodquality, energy saving and environment protection, convenient operation and maintenance, low cost, safe use, long service life, and the like.

The invention is applicable to the field of photoresists, and provides a polymerizable double onium salt structure-containing photoacid generator which is used for preparing a photoresist. The polymerizable double onium salt structure-containing photoacid generator has the following structural general formula (I), wherein n is an integer greater than or equal to 1; R1-R4 are one or more of H, an alkyl group with 1-20 carbon atoms, an aryl group or a substituent group containing sulfur / oxygen / nitrogen heteroatoms; and the anion M- is a sulfonic acid anion. The polymerizable double onium salt structure-containing photoacid generator has the double onium salt structure, and compared with a photoacid generator with a single onium salt structure, the polymerizable double onium salt structure-containing photoacid generator has high acid generation efficiency and can be suitable for light sources with various wavelengths. The polymerizable double onium salt structure-containing photoacid generator is polymerizable, so that photoresist using the polymerizable double onium salt structure-containing photoacid generator does not need to be additionally added with photoresist resin.

The invention belongs to the technical field of a biogas preparation method, and provides a technology method for high-efficiency anaerobic fermentation production of biogas by lignocellulose-rich materials. The technology method comprises the following steps of material pulping, biological treatment, facultative hydrolyzing and acid production, anaerobic fermenting, solid and liquid separating, refluxing and the like. The technology method solves the problems of low pretreatment efficiency of the lignocellulose-rich materials, overhigh concentration of reflux biogas, and low biogas productionefficiency in the prior art.

The invention relates to a nitrogen oxide flue gas absorption and acid production system. The system comprises a flue gas conveying device, an oxygen-containing gas distribution conveying device, a plurality of acid production tanks, a plurality of absorbers and an exhaust gas purifier; the acid production tanks are sequentially arranged in a sequential order, and a liquid inlet and a first gas outlet are formed in the upper end of each acid production tank and communicated with the interior of the acid production tank; the absorbers correspond to the acid production tanks one to one, and a liquid discharge port of each absorber is communicated with the liquid inlet of the corresponding acid production tank; output ends of the flue gas conveying device and oxygen-containing gas distribution conveying device are separately communicated with a gas inlet of the absorber corresponding to the foremost acid production tank; the exhaust gas purifier is communicated with the first gas outlet of the rearmost acid production tank; the first gas outlet of each front acid production tank is communicated with the gas inlet of the absorber corresponding to the adjacent rear acid production tank;acid circulation outlets of the acid production tanks are all communicated with liquid inlets of the corresponding absorbers. The system has the advantages that the smoke treatment effect is good, energy is saved, and the environment is protected.

The invention is suitable for the technical field of photosensitizers, and provides a photosensitizer and a preparation method thereof. The structural general formula of the photosensitizer is shown in the specification, wherein R1 is one or more of substituent groups containing sulfur / oxygen / nitrogen heteroatoms of aromatic hydrocarbon with 1-10 hydrogen and carbon atoms; r2 is one or more of hydrogen, methyl, propyl, isopropyl, n-butyl, tertiary butyl, methoxyl, ethyoxyl, propoxy, isopropoxy, isobutoxy or fluorine, bromine and iodine; r3 is one or more of hydrogen, aromatic hydrocarbon of alkane with the carbon atom number of 1-10 or substituent groups containing sulfur / oxygen / nitrogen heteroatoms; r4 is one or more of hydrogen, aromatic hydrocarbon of alkane with the carbon atom number of 1-10 or substituent groups containing sulfur / oxygen / nitrogen heteroatoms. According to the photosensitizer and the preparation method thereof, the diffusion range can be effectively controlled, the photoresist has better morphology and line width roughness, defects are reduced, meanwhile, the preparation method provided by the invention is simple in step, and various photosensitizers can be prepared.

The invention discloses a method for improving sludge liquid fermentation acid production by removing humic acid through limited-quantity catalytic flocculation, and belongs to the field of sludge treatment. The method comprises the following steps: adjusting municipal sludge to a certain concentration, then carrying out pyrohydrolysis in a high-temperature and high-pressure reaction kettle, and releasing organic matters in the sludge into a liquid phase; carrying out solid-liquid separation to obtain sludge hydrolysate containing high-concentration soluble organic matters; adding TiO2, irradiating by utilizing ultraviolet light, stopping irradiating when the zeta potential of humic acid in the sludge hydrolysate is 30.0-20.0 mV, carrying out chemical flocculation by using CaCl2, carrying out solid-liquid separation to remove precipitates, and carrying out liquid state fermentation on supernatant to produce acid. According to the method, anaerobic fermentation acid production of the sludge can be promoted to the maximum extent, and the problems of low acid production efficiency, high cost, low resource utilization efficiency and the like of existing hydrolysate liquid state fermentation are solved; the concentration of the soluble humic acid is reduced by 65%-70%, and the total acid production efficiency is obviously improved.

According to the present invention, a process for producing an amino acid using a microorganism in which aspartate aminotransferase activity is decreased or deleted, and which has the capability of producing and accumulating the amino acid is provided.

The invention relates to an L-lysine fermentation method with a short period and high yield. A flow distribution manner is adopted for feeding fermentation broth discharged from a continuous fermentation process into a new fermentation medium so as to carry out further fermental cultivation under the condition of fed-batch carbon source and nitrogen source. The L-lysine fermented through the fermentation method provided by the invention has the advantages that the period is 32 hours, the acid production rate reaches 18.5 percent, the conversion ratio reaches 72 percent, and the effect is remarkable.

The invention belongs to the technical field of production of L-isoleucine, and discloses a production technology of L-isoleucine. The production technology of the L-isoleucine comprises the followingsteps of step (1) fermentation, step (2) concentration and re-dissolution, step (3) first decoloration, step (4) secondary decoloration and step (5) edulcoration and crystallization. The production technology of the L-isoleucine is simple and feasible, and the yield and purity of the L-isoleucine are improved.

The invention provides a sulfonate alkane ester preparation method, which comprises: dissolving sulfonate alkane carboxylic acid and alcohol in an organic solvent to form a reaction liquid; under a nitrogen protection condition, heating the reaction liquid to a specific temperature, starting microwaves, and carrying out an esterification reaction under a microwave condition. According to the preparation method disclosed by the invention, on the premise of not adopting a catalyst, the reaction time is shortened, and meanwhile, the reaction conversion rate of the sulfonate alkane carboxylic acid and alkane alcohol or aromatic alcohol and the purity of the product sulfonate alkane ester are greatly improved.

The invention belongs to the technical field of microorganisms, and particularly relates to a hemarthria herbage silage lactobacillus additive. The hemarthria herbage silage lactobacillus additive comprises a component A and a component B; the component A and the component B are each any one of lactobacillus rhamnosus 753, lactobacillus salivarius 358 and lactobacillus plantarum LP694, and the component A and the component B are different; the mass ratio of the component A to the component B is (1-2): (1-2); the preservation number of the lactobacillus rhamnosus 753 is CGMCC No.18233, the preservation number of the lactobacillus salivarius 358 is CGMCCNo.18232, and the preservation number of the lactobacillus plantarum LP694 is CGMCC No.15073. The lactobacillus additive disclosed by the invention is high in growth rate and high in acid production efficiency; the sensory quality of hemarthria herbage silage can be obviously improved; the lactic acid and acetic acid content of the hemarthria herbage silage can be significantly increased, and the content of harmful acids including butyric acid and the like is reduced, so that lactobacillus becomes dominant microflora, harmful bacteriain the hemarthria herbage silage are inhibited, and the ensiling quality of herbage is improved.

The invention discloses a photoacid generator containing a double onium salt structure. The photoacid generator has a structural general formula (I) shown in the specification, in the formula, n is equal to 0 or 1 or 2, and R1-R6 is one or more of H, alkyl with 1-20 carbon atoms, aryl or substituent groups containing sulfur / oxygen / nitrogen heteroatoms; and the M-anions and the Q-anions are sulfonic acid anions. Compared with a photoacid generator with a single onium salt structure, the photoacid generator with the double onium salt structure has higher acid generation efficiency and can be suitable for light sources with various wavelengths.

The invention discloses a preparation method of fermented jackfruit vinegar. The method comprises the following steps that S1, jackfruit pulp is put into a color retention agent and soaked, the jackfruit pulp obtained after soaking is mixed with distilled water, and homogenization is conducted to obtain jackfruit pulp slurry; S2, a bacteriostatic agent is added to the jackfruit pulp slurry obtained in the step S1 for bacteria inhibition, pectinase is added for enzymolysis, the sugar content and pH are adjusted, and jackfruit fermentation liquor is obtained; S3, a secondary yeast propagation seed solution is added to the jackfruit fermentation liquor obtained in the step S2 for alcoholic fermentation, and filtration is conducted to obtain jackfruit fermented wine; S4, the pH of the jackfruit fermented wine obtained in the step S3 is adjusted, a secondary acetic acid bacteria propagation seed solution is added for acetic fermentation, after shaking culture, jackfruit vinegar raw stock isobtained, and after filtration and sterilization, the fermented jackfruit vinegar can be obtained. The acid content of the fermented jackfruit vinegar is high, the aroma components of the fermented jackfruit vinegar are rich, the fermented jackfruit vinegar has various health-care functions, and the application and popularization prospect is wide.