41 results about "Sugar industry" patented technology

The invention discloses a molasses-based biomass sulfonated carbon catalyst preparation method, which comprises: grinding and mixing solid molasses and sodium hydroxide, calcining at 500-650 DEG C in an inert atmosphere to obtain activated carbon, and carrying out a sulfonation reaction on the activated carbon and concentrated sulfuric acid to obtain the catalyst. According to the method, by-product molasses in the sugar industry is taken as a raw material, a carbon source is rich in source, low in price and easy to obtain, the process is simple, the catalyst has relatively high specific surface area and conversion rate, the by-product can be utilized in a high-valued manner, and the method has certain industrial practical value.

The invention discloses a biological hydrogen production method for coupling a coal seam microbial community and beet pulp waste. The biological hydrogen production method comprises the following steps: step 1, collecting coal seam microorganisms; step 2, sample pretreatment; 3, preparing a culture solution; step 4, flora enrichment culture; and 5, constructing a biological hydrogen production system to obtain hydrogen-rich gas. Microorganisms adopted in the method are original microorganisms in underground in-situ coal seam or ground coal-bed gas well drainage and mining water, sugar industry waste beet pulp is adopted as a hydrogen production substrate, and aiming at the bottlenecks of high strain cost, limited substrate applicability and the like in an existing biological hydrogen production technology, the coal seam microorganisms and sugar industry waste residues are coupled, so that the yield of hydrogen is increased. A low-cost hydrogen production system is constructed, so that the economic cost in the microbial hydrogen production process is reduced, and the beet pulp has the advantages of being safe, easy to obtain, low in cost and high in gas production rate, has the advantages of being easy and convenient to operate, economical, efficient, environmentally friendly and the like, and has a good industrial application prospect.

The invention discloses a raw amylolytic enzyme mutant as well as an expression strain and application thereof. According to the present invention, alpha-amylase AmyZ1 from Pontibacillus sp.ZY is adopted as a starting enzyme, a substrate binding subsite is determined through molecular docking, and site-directed mutagenesis is performed on residues at a + 1 site and at a 199 site so as to obtain the mutant enzyme L199F with high glucose yield; when the mutant enzyme is used in an industrial sugar manufacturing process, corn raw starch is used as a substrate, and the DE value can reach 35% after liquefaction for 2 h and is 1.44 times that of a starting enzyme; after saccharification for 18 hours, the DE value can reach 99%, which is 5 hours earlier than that of the starting enzyme. Therefore, the mutant enzyme has relatively high potential application value in the field of sugar industry taking corn raw starch as a substrate.

The invention discloses a method and a system for efficiently producing short-chain fatty acid by utilizing waste molasses in the sugar industry and municipal sludge through synergistic anaerobic fermentation, and belongs to the technical field of organic solid waste recycling. Waste molasses and municipal sludge are mixed according to a specific ratio, the carbon-nitrogen ratio is optimized to 20-30: 1, trace metal catalysts (Fe < 2 + >, Co < 2 + > and Ni < 2 + >) are added, and two-stage pH regulation (the initial pH is 6.0-7.0, and the later pH is 5.5-6.0) and a medium-temperature (35-37 DEG C) anaerobic fermentation process are combined, so that the yield of short-chain fatty acid is remarkably increased to 5.2-6.8 g COD / L and is increased by 200-300% compared with that of traditional sludge single-substrate fermentation. The method realizes recycling and high-value conversion of the organic solid waste, and has the characteristics of low cost, high acid production efficiency and environmental friendliness.

The invention belongs to the technical field of sugar industry, and particularly relates to a five-effect evaporation tank control method based on a big data model, and the method comprises the following steps: S1, an evaporation joint control system sends an execution action instruction; s2, the PLC collects feedback data of the intelligent equipment and submits the feedback data to a model training task; s3, establishing a big data model; s4, performing model evaluation, and if the predicted value is close to the actual value, starting the model; if the difference is large, returning to S2; s5, adjusting scales of the valve and the pump are calculated according to the model, and an action execution instruction is issued; and S6, the PLC receives the instruction, and opening / frequency adjustment is achieved. The problems that in the prior art, when operation of feeding, discharging, steam feeding, ammonia gas discharging, vacuumizing and the like of the five-effect evaporation tank of the evaporation section of a refining workshop is controlled based on an application system, independent control over each effect tank is limited, joint control over the whole process cannot be achieved, and mutual influence between the effect tanks is likely to be caused can be solved, and good market application prospects are achieved.

The invention discloses a digital intelligent warehousing system for raw material sugar, and relates to the technical field of warehousing in the sugar industry. Comprising a candy unloading pit, a first belt conveyor, a second belt conveyor, a bucket elevator, a third belt conveyor, a rail-mounted unloading trolley, a fourth belt conveyor, a traveling leveling machine, a fifth belt conveyor, a sixth belt conveyor and a reversing valve which are sequentially arranged in the material flowing direction. A grate is arranged at the top of the candy unloading pit, a conical funnel with a flow regulating valve is connected below the grate, and the feeding end of the first belt conveyor is connected below the funnel; according to the system, the utilization rate of the warehouse space can be effectively increased, the working environment in the warehouse can be remarkably improved, accurate batch management and first-in first-out control of raw materials are achieved, meanwhile, safety risks and potential quality hazards caused by traditional manual operation are reduced, and the working efficiency is improved. And a more efficient, controllable and environment-friendly raw material storage solution is provided for the modern sugar industry.

The invention discloses a method for realizing circulating clarification utilization of sugar industry filter mud based on calcination, which comprises the following steps: filter mud drying: scattering and drying wet filter mud to obtain dry filter mud; suspension flash burning: mixing the dry filter mud with limestone powder, calcining by utilizing secondary hot air in a suspension cooling process, removing organic matters in the dry filter mud and partially decomposing calcium carbonate in the mixed material; performing fluidized bed roasting: introducing high-pressure air into the mixed material subjected to suspension flash burning treatment to enable the material to utilize waste heat of the material in a boiling state to complete deep decomposition of calcium carbonate so as to obtain a high-temperature finished product; suspension cooling: cooling the high-temperature finished product to obtain a low-temperature finished product; digesting: digesting a low-temperature finished product to prepare lime milk; and flue gas reutilization: the CO2-containing flue gas generated by suspension flash burning is sequentially used as a drying heat source for filter mud drying, and is used for a sugar juice clarification and carbonation process after being purified. According to the invention, the pollution problem is solved, resource utilization is realized, the use of limestone is reduced, the flue gas heat of the system is fully utilized, and the energy consumption is reduced.

The present disclosure provides an equipment and a process for the clarification of feed juice. The equipment offers a compact design with reduced capital and operational costs, requiring a low residence time that minimizes sucrose inversion and heat loss, thereby enhancing clarification efficiency. The process for feed juice clarification requires minimal retention time, ultimately delivering a simplified and cost-effective solution for the cane sugar industry.

The invention belongs to the field of sugar industry, and discloses a method for enriching and separating sugarcane flavor substances. A co-processing method of sugarcane juice acid adjustment, heating, vegetable tannin coagulation, plate frame filtration, secondary heating, high-temperature evaporation, condensation, subcritical extraction and distillation is mainly adopted, filtered juice subjected to existing plate frame filtration treatment is high in quality, the water content of a filter cake is low, and the extraction, enrichment and purification processes of sugarcane flavor substances are green production processes. The method has the advantages that the method is simple in operation, the influence on subsequent processing of the sugar juice is small, the comprehensive utilization value of the obtained filter mud, deodorized water and other byproducts is high, the sugarcane flavor substance enrichment and separation system has the characteristics of compact and advanced equipment, high efficiency and the like, products are diversified, the value of the byproducts is high, and the comprehensive economic benefit and social benefit are very remarkable.

One or more embodiments of the present specification provide a graphite cooler for producing sulfur dioxide in the sugar industry. By heating boiling water at 100°C in a boiling water tank, the first heat conductive plate and the second heat conductive plate respectively sense the temperature of the top of the boiling water tank and the cooling box and then transmit the temperature to the first thermal expansion block and the second thermal expansion block. When the temperature on the top of the cooling box is higher than 100°C, the second thermal expansion block has a relatively large expansion volume, which pushes the rotating disk to rotate, and drives the second connecting rod to move toward the detection cavity side through the first connecting rod, thereby linking the upper end of the third connecting rod to tilt toward the air adjustment shaft, so that the locking plate locks the locking gear, and the first and second air passing blades are fixed to achieve the closure of the air inlet, so that the sulfur dioxide in the cooling box continues to cool down until the temperature requirement is met, thereby avoiding temperature measurement and cooling again, saving manpower and material resources, and greatly reducing the waste of resources.

This invention relates to the field of road dust suppression technology, specifically to a bio-based dust suppressant that can be used for road reinforcement. Based on 100% solid content, it contains the following components in the following weight ratio: 100 parts xylose mother liquor and 3-50 parts polyamine crosslinking agent; wherein the xylose mother liquor contains 20%-70% solids by weight, with the remainder being water; wherein the solids contain ≥50% reducing sugars by weight, including D-xylose, L-arabinose, D-glucose, and D-galactose, and the xylose content in the solids is ≥20%. The dust suppressant obtained by this invention uses a large amount of waste xylose mother liquor, a byproduct of the sugar industry. This product is a renewable resource and a low-carbon renewable product. Furthermore, the dust suppressant obtained by this invention not only has dust suppression function but also good compressive strength and water resistance, and can be used as a soil stabilizer. Applying the dust suppressant of this invention to roads can produce a pavement system with excellent overall performance.

The invention relates to the technical field of sugar industry, and discloses a worm type sedimentation system which comprises a settler barrel, a negative pressure steam dispersing box, a retarder, a worm type backflow plate, a step-by-step thickening mud scraping mechanism, a mud collecting barrel and an I-shaped juice outlet ring groove. Compared with an existing settler, the device is characterized in that a juice inlet buffer is arranged at the upper part of the center of a worm type backflow plate of the settler, heated cane juice flows out through a negative-pressure steam dispersing box, and the cane juice enters the buffer tangentially after being added with an auxiliary agent and fully mixed, and enters a limited worm type backflow plate along the umbrella-shaped edge of the buffer; the liquid flow gradually settles outwards along the worm type backflow plate, and mud juice generated in the settling process is accumulated at the cone bottom; mud juice is discharged into the mud collecting barrel through the step-by-step thickening mud scraping mechanism and flows out of the mud discharging opening. Clarified juice flows out from a juice outlet ring groove in the periphery of the worm type backflow plate. The device can reduce the retention time of the cane juice in the settler, and has the characteristics of less sucrose conversion, high mud juice concentration, transparent clear juice, small equipment occupied area, large squeezing resistance fluctuation range and the like.

The application discloses a method for preparing 5-hydroxymethylfurfural by molasses conversion, comprising the following steps: preparing a molasses aqueous solution, passing the molasses aqueous solution into an adsorption column filled with a basic adsorbent, adsorbing by the basic adsorbent, separating acid impurities in the molasses aqueous solution, then adding inorganic acid into the molasses aqueous solution, and adjusting the pH of the molasses aqueous solution to 5-7; taking the molasses aqueous solution after pH adjustment and purification as a raw material, introducing an organic solvent, constructing a water / organic phase two-element system, introducing a catalyst, and carrying out conversion reaction at 120-160 DEG C for 0.5-3 h, so as to generate 5-hydroxymethylfurfural. The application creates a method for removing impurities from molasses pretreatment, and constructs a corresponding catalytic system, so that the by-product molasses of sugar industry is recycled, the preparation cost of 5-hydroxymethylfurfural is reduced, and the molasses is also used in a high added value way.

The invention discloses a functional biological organic compound fertilizer which is prepared by adding microbial strains into raw materials and fermenting, the raw materials comprise sugar refinery filter mud, bagasse and coffee grounds, and the microbial strain is bacillus with a nitrogen fixation effect. The raw materials used in the invention are wastes which are easy to obtain and low in price, and the wastes are turned into wealth by composting the raw materials, so that the green, sustainable and healthy development of the sugar industry is promoted, and the energy utilization efficiency is improved; according to the invention, the bacillus and each strain in the pile body cooperate with each other, so that the organic matter content and the organic acid conversion rate of the organic fertilizer have obvious advantages, the utilization rates of N, P and K are greatly improved, the crop yield is obviously increased, and the problem of low fertility of the organic fertilizer produced by fermentation is solved. By applying the method, the harm generated by the acid soil is solved, the soil fertility is increased, the biotoxicity of heavy metals and other toxic and harmful substances in the soil is reduced, the area of the cultivable soil is enlarged, the utilization rate of the fertilizer can be effectively increased, and the application amount of agricultural and forestry chemical fertilizers is reduced.

The invention discloses a preparation method of a dextran standard substance, which comprises the following steps: collecting various process sugar material mixed samples of different sugar refineries, carrying out alcohol precipitation, membrane filtration, column purification and other technical means to obtain a special dextran standard substance for the sugar industry, and comparing the standard substance with a commercially available dextran standard substance, the content of the dextran in a sugar refining sample can be more truly reflected, the actual sugar refining condition can be represented, and the detection error is eliminated.

The invention belongs to the technical field of sugar industry production, and discloses a xylose mother liquor separation treatment method which comprises the following steps: S1, pretreating xylose mother liquor to obtain chromatographic feed liquid; s2, two-component chromatographic separation is carried out on the chromatographic feed liquid obtained in the step S1, a fast component BD liquid and a slow component AD liquid are obtained, and Cr7300 negative chromatographic resin is adopted as a filling material for two-component chromatographic separation; s3, sequentially concentrating, crystallizing, centrifuging and drying the AD liquid obtained in S2 to obtain a xylose product. In order to solve the problems of low xylose mother liquor high-value utilization degree, high energy consumption of traditional crystallized xylose production, limited purity and yield and the like in the prior art, the method disclosed by the invention adopts Cr7300 negative chromatographic resin for extraction to obtain the slow component xylose AD liquid, and breaks through the separation effect of other chromatographic resins on the market on xylose in the aspects of purity and yield; the xylose mother liquor can be subjected to one-time crystallization after being subjected to chromatographic separation to obtain high-end commercial xylose.

The invention belongs to the technical field of enzyme engineering and food biology, and particularly relates to a method for preparing fructo-oligosaccharide based on double-enzyme co-expression. According to the invention, a double-enzyme system for co-expressing glucose isomerase and FTase mutants is adopted to catalyze sucrose or a sucrose-containing substrate for reaction. Through an ingenious enzyme engineering strategy, the key inhibition problem in FOS synthesis is solved in principle, raw material pretreatment and process optimization are successfully integrated, a set of efficient, economical and green fructo-oligosaccharide preparation technology is formed, and powerful technical support is provided for production of functional food ingredients and transformation and upgrading of the sugar industry.

The invention provides a pseudo crystal identification processing method, system and equipment, and relates to the technical field of sugar industry, the method comprises the following steps: continuously obtaining sugar crystal images in crystallization equipment after sugar boiling crystallization begins; according to the sugar crystal image, obtaining size and quantity characteristics of crystals in the crystallization equipment; judging whether pseudo crystals exist in the crystallization equipment or not according to the size and quantity characteristics; if pseudo crystals exist in the crystals, generating a valve adjusting strategy of the crystallization equipment according to the size and number characteristics of the pseudo crystals; and adjusting the valve of the crystallization equipment according to the valve adjusting strategy until the pseudo crystal disappears. Through automatic and intelligent pseudo crystal detection and valve adjustment, the production efficiency is improved, and the sugar boiling standardized operation is standardized.

The present invention relates to an adhesive coating intended for tissue engineering and bone regeneration that comprises hydroxyapatite (HA) synthesised from Carbocal from the sugar industry and having strong binding mediated by a commercial medical-grade epoxy adhesive. The adhesive coating is an osteoinductive composite material with biocompatible characteristics as of the first 24 hours after use on implantable surfaces or as independent bone filler. In the latter case, it is a material that solidifies in less than three hours and, given that it exhibits mesopores throughout the volume thereof, accepts blood infiltration from the patient who is being surgically operated on.

The invention discloses a system and process for treating sugar industry filter mud through suspension calcination, the system comprises a suspension flash burning furnace, a first-stage separator, a fluidized bed furnace, a scattering dryer, a second-stage separator, a suspension cooling system and a digestion system, and the suspension cooling system comprises a first-stage cooling unit and a last-stage cooling unit; cooling air is introduced into the final-stage cooling unit, and an air outlet of the final-stage cooling unit is connected with a secondary air inlet of the suspension flash burning furnace through the first-stage cooling unit; according to the flow direction of gas, the gas outlet of the suspended flash burning furnace is connected with the sugar juice clarifying system through the primary separator, the scattering dryer, the secondary separator and the dust collector in sequence; a discharging pipe of the second-stage separator is connected with a material feeding opening of the suspension flash burning furnace, a discharging pipe of the first-stage separator is connected with a feeding opening of the fluidized bed furnace, a furnace gas outlet of the fluidized bed furnace is connected with the first-stage cooling unit, and a discharging opening of the first-stage cooling unit is connected with the sugar juice clarifying system through the final-stage cooling unit and the digestion system. The problem of pollution caused by filter mud stacking and landfill is solved, resource utilization is achieved, and energy consumption of the system is reduced.

The invention provides a dust suppressant as well as a preparation method and application thereof, and the dust suppressant comprises the following components in percentage by weight: 25-35% of cane molasses, 0.05-0.15% of a penetrant, 1.5-2.5% of a moisture absorbent, 1.5-2.5% of a water-retaining agent and the balance of water. The dust suppressant has the advantages that firstly, the main material of the dust suppressant is the by-product cane molasses in the sugar industry, the main material is low in price and wide in source, and more than 98% of the raw materials in the dust suppressant are environment-friendly materials, so that the dust suppressant has the advantage of being green and environment-friendly; and secondly, the dust suppressant can integrate the functions of bonding, wetting, moisture absorption, water retention and the like, can solidify dust, has good destructive power resistance, can effectively resist interference of external strong force and suppress the dusting phenomenon, and has an ideal dust suppression effect.

The invention discloses a method for reconstructing soil through synergy of sugar refining by-products and tailings, which belongs to the technical field of ecological utilization of solid waste and comprises the steps of tailing analysis, proportioning, physical reconstruction and maintenance. Single or combined sugar production byproducts are added for tailings with different textures and soil reconstruction potential, and after the tailings are synergistically promoted to be reconstructed into soil in a physical reconstruction mode, the environment-friendly requirement of soil for ecological restoration engineering can be met. The method is green, low-carbon and low-cost, cross-industry cooperation of ecological utilization of industrial and agricultural wastes and tailings can be realized, and the source of needed sugar refining byproducts is stable; according to the method, in-situ replacement of soil for ecological restoration engineering of the mining area can be realized, and nearby consumption of sugar industry byproducts around the mining area is considered.

The application provides a dust suppressant and a preparation method and application thereof, and according to the weight percentage, the dust suppressant comprises the following components: 25-35% of sugarcane molasses, 0.5-1.5‰ of penetrating agent, 1.5-2.5% of hygroscopic agent, 1.5-2.5% of water-retaining agent, and the balance of water. The dust suppressant has multiple advantages. Firstly, the main material of the dust suppressant is sugarcane molasses, a by-product of sugar industry, which is low in price and widely available. More than 98% of the raw materials in the dust suppressant are environment-friendly materials, so the dust suppressant has the advantages of green environmental protection. Secondly, the dust suppressant can integrate the functions of adhesion, wetting, moisture absorption and water retention, can make the dust solidify, has good anti-damage performance, can effectively resist the interference of external force, inhibit the dust raising phenomenon, and has ideal dust suppression effect.

The present application belongs to the technical field of groundwater pollution remediation, and particularly relates to an in-situ biological stimulation remediation method for treating Cr(VI) and organic compound contaminated groundwater. The method is to use sugarcane syrup as a remediation reagent to stimulate the growth and domestication of indigenous microorganisms, so as to effectively remove the compound pollution in the groundwater. The sugarcane syrup, a by-product of sugar industry, has the best effect on removing the compound pollution of Cr(VI) and nitrobenzene (the removal rate can reach 99%). The present application also determines the removal conditions of the compound pollution of Cr(VI) and nitrobenzene: pH is greater than or equal to 7, temperature is greater than or equal to 15 DEG C, Cr(VI) is less than or equal to 35 mg / L, and the concentration of nitrobenzene is less than 75 mg / L. Under the conditions, the removal rate of Cr(VI) can reach 99%, and the removal rate of nitrobenzene can reach 95%. The present application provides an innovative solution for simultaneously remedying the groundwater contaminated by Cr(VI) and organic compounds.

The utility model belongs to the technical field of production equipment in the sugar industry, and particularly relates to novel equipment for treating powdered sugar and scattered finished sugar in production, which comprises a processing tank body, an upper cover body arranged above the processing tank body through bolts, and a feeding hot water pipe arranged on the surface of the processing tank body, the filtering and stirring assembly is arranged in the processing tank body; scattered finished sugar and unqualified sugar powder particles are uniformly collected by personnel and placed in the processing tank, water is injected into the processing tank to melt the sugar particles, and impurities in the sugar blocks are screened in cooperation with the filter plate a, so that waste of resources is reduced, single-person operation can be realized, manpower and material resources are greatly saved, and the processing efficiency is improved. And a heating assembly is matched, a plurality of heating pipe bodies are installed in the inserting groove, the fixing sleeve is arranged on the surface of the processing tank body in a sleeving mode, purified syrup is heated to a certain temperature and conveyed everywhere, and finished syrup is conveyed to a designated position.

The utility model relates to the technical field of sugar industry, and discloses an evaporation device for high fructose corn syrup production, which comprises a bottom plate and a motor I. The driving end of the motor I is fixedly connected with a mandrel, the middle end of the outside of the mandrel is fixedly connected with a roller, and the outside of one side of the mandrel is rotatably connected with a support plate. The bottom of the supporting plate is fixedly connected with a supporting table, a fixed shaft is fixedly connected to the interior of the rolling wheel, a connecting rod is rotationally connected to the exterior of the fixed shaft, and a round cover is fixedly connected to one side of the connecting rod. According to the automatic quantitative blanking device, circular motion is converted into linear reciprocating motion through the design of the rolling wheel and the fixed shaft, and the round cover is driven to achieve covering and automatic quantitative blanking; the mandrel, the roller, the fixed shaft and the connecting rod are convenient to disassemble and replace, the maintenance cost is reduced, meanwhile, the strength and stability of the whole structure are improved, the liquid distribution uniformity is improved through the rotary flow dividing layer, a local liquid film is prevented from being too thick and too thin, and therefore the evaporation efficiency is improved, and the heating time and the scaling risk are reduced.

The invention belongs to the technical field of activated carbon production, and particularly relates to a production process for producing activated carbon with a caramel decoloring function for wood sugar by using a physical activation method. The method comprises the following steps that S1, raw material screening and pretreatment are conducted, specifically, high-quality wood with the water content being 10%-15% is selected and cut into wood chips with the length being 5-10 cm, the width being 3-5 cm and the thickness being 1-2 cm, and then the wood chips are dried at the temperature of 100-120 DEG C till the water content is lower than 5%; through optimized process steps, especially a unique activation process, the activated carbon has rich micropore and mesopore structures and has higher adsorption capacity on caramel pigment, the caramel decolorization rate is remarkably increased, the requirement of the sugar industry for high-quality activated carbon can be met, and the high caramel decolorization performance is achieved.

This invention relates to the field of soil improvement, specifically to a sugarcane planting method that improves soil physicochemical properties. The planting method is as follows: Step S1: Soybean harvesting and returning to the field; Step S2: Soil testing and preparation of base fertilizer. This invention constructs a sugarcane-soybean intercropping symbiotic system, forming a synergistic improvement technology solution of "using waste to nourish the soil, using bacteria to promote growth, and slow-release fertilization." This method overcomes the shortcomings of traditional measures that are singular and lack synergy, achieving a systematic and sustainable improvement of soil physical structure, chemical fertility, and biological activity. It significantly improves the efficiency of nutrient resource recycling, sugarcane stress resistance, and final yield and quality. This planting method has a high degree of technical integration and strong operability, and has broad application prospects for solving the obstacles of long-term continuous sugarcane cropping and promoting the green and sustainable development of the sugar industry.

The application discloses a preparation method of an environment-friendly paper clothes hanger, and belongs to the technical field of paper pulp molding products and waste resource utilization. The method uses sugar cane residue, a by-product of sugar industry, as raw material, and obtains paper pulp through the following steps: cleaning and dust removing, cooking or alkali chemical treatment for pulping, and grinding. After adding waterproof agent and reinforcing agent into the pulp and adjusting the concentration, the pulp is injected into a clothes hanger mold, a wet blank is prepared through vacuum dewatering and / or hot-pressing forming, and then drying and setting are performed to obtain the environment-friendly paper clothes hanger. The method uses the sugar cane residue to replace wood, realizes waste resource utilization, and the prepared clothes hanger has good strength and moisture-proof performance and can be biodegraded after being discarded.

The application discloses a method for preparing yeast by using corn starch sugar residue as a nitrogen source. The method comprises the following steps: firstly, dissolving corn starch sugar residue, adding appropriate amounts of K2HPO4, KH2PO4 and MgSO4, adjusting pH to 8.5-10.5, high-pressure homogenization treatment, preparing a sugar residue solution, adding alkaline protease, and performing enzymolysis reaction; after the enzymolysis is completed, supplementing glucose and performing high-temperature and high-pressure sterilization; inoculating activated yeast, and performing culture; after reaching the stable period, performing centrifugation, collecting and washing the precipitate, and preparing fresh yeast. The method uses a by-product of a corn starch sugar industry as a raw material, utilizes the physical action of homogenization and the biochemical action of enzymolysis, dissociates the protein supramolecular structure of the hydrophobic denatured aggregated and condensed state in the sugar residue, performs enzymolysis on the protein, uses the enzymolysis liquid as an organic nutrient nitrogen source element, utilizes the sugar carried by the sugar residue, supplements appropriate amounts of glucose carbon source, and then performs yeast culture, propagation and preparation.