18results about How to "Efficient resource utilization" patented technology

The application discloses a shrimp head hydrolysate with anti-freezing activity and a preparation method and application thereof, and belongs to the technical field of biology. The shrimp head is treated by fermentation with the aid of a magnetic field and Pediococcus pentosaceus, and a shrimp head hydrolysate with high anti-freezing effect is prepared. Six polypeptides with high anti-freezing activity are identified from the shrimp head hydrolysate through mass spectrometry analysis. The polypeptides have high ice recrystallization inhibition activity, can inhibit the formation of ice crystals and the migration of water during the food freezing process, reduce the mechanical damage of ice crystals to food, inhibit the protein denaturation caused by ice crystals, and can also reduce the thawing loss and cooking loss of food, and has great application value in food frozen storage.

The invention relates to a cyclic preparation method of a spirolactone key material, and belongs to the technical field of medicines. According to the method, resource utilization is carried out on a byproduct compound 2 generated in the production process of a spirolactone intermediate 1, and the byproduct compound 2 is converted into a spirolactone key material compound 1 under the acidic condition. The reaction is carried out in an organic solvent or an aqueous medium, the acidic aqueous solution is selected from hydrochloric acid, sulfuric acid, trifluoroacetic acid, acetic acid, nitric acid or phosphoric acid, the concentration range is 0.1-6 mol / L, the reaction temperature is 0-100 DEG C, the reaction time is 0.5-96 hours, and the feeding molar ratio of the compound 2 to the acid is 1: 0.5-1: 10. The organic solvent can be selected from ethers, alcohols, esters or haloalkanes. The obtained compound 1 can be used as a raw material for preparing spirolactone, and a final product is obtained through an oxygen bridge reaction, an esterification reaction, a decarboxylation reaction, an etherification reaction, a dehydrogenation reaction and a thioation reaction. The method provided by the invention realizes cyclic utilization of production byproducts, improves the utilization rate of raw materials, reduces the production cost, reduces waste discharge, and has a good industrial application prospect.

The application discloses a device for centralized collection and timely and full-amount pretreatment of household kitchen garbage in a community for biomass utilization, which comprises a frame, an inlet hopper, a shunting component, two stirring barrels, a cleaning assembly, two stirrers arranged in the stirring barrels, a supporting plate, two stirring core lifting components, an outlet hopper, a hard bone collection drawer, a hard bone sorting transmission assembly, a hard bone sorting driving assembly and an outer shell. The device can be used all day long, and can collect and pretreat the daily household kitchen garbage with small daily amount. In the pretreatment process, food residues are crushed, and organic matters on hard bones are stripped. Meanwhile, large hard bones which can cause damage to subsequent processing equipment for biomass utilization are separated and collected by controlling the solid size in the kitchen garbage slurry. After the large hard bones are removed, the kitchen garbage slurry flows into a slurry temporary storage pool, so that the centralized collection, timely treatment and full-amount resource utilization of household kitchen garbage are realized.

The application provides a steel dust and organic solid waste low-carbon synergic treatment melting furnace, which comprises a feeding unit, an iron bath pyrolysis unit and a recovery unit which are sequentially communicated; the iron bath pyrolysis unit comprises a furnace body containing molten iron and an oxygen delivery assembly communicated with an upper cavity in the furnace body; the feeding unit comprises a steel dust injection assembly, an organic solid waste injection assembly and an organic solid waste feeding opening arranged on the top of the furnace body and communicated with the furnace body; and the recovery unit comprises a flue gas recovery assembly communicated with an exhaust opening arranged on the shoulder of the furnace body. Through the above manner, the melting furnace can not only treat different types of organic solid waste and improve the utilization efficiency, but also treat the steel dust by using the organic solid waste, so that molten iron, dust rich in volatile metal elements and high-calorific-value synthetic gas rich in CO and H2 are produced, the reaction rate is fast, the product quality is high, and the efficient resource utilization of the organic solid waste and the steel dust is realized.

This invention provides a coffee pericarp enzyme, its specific compound fermentation agent, and a preparation method, belonging to the field of enzyme production technology. The preparation method of the coffee pericarp enzyme of this invention includes the following steps: mixing coffee pericarp powder with sacha inophyllum pomace saccharides, and sequentially subjecting the mixture to fermentation with *Saccharomyces cerevisiae* YNXC003 and anaerobic fermentation with *Bifidobacterium bifidum* YNXC004 to obtain the coffee pericarp enzyme. This invention uses coffee pericarp powder and sacha inophyllum pomace saccharides as compound raw materials, combined with a specific fermentation agent, and employs a segmented fermentation mode. This not only fully releases the nutritional activity of the two raw materials, significantly improving the nutritional level and flavor of the enzyme, but also endows the enzyme with physiological functions such as lowering blood sugar. The total acid content of the coffee pericarp enzyme of this invention is 8-12 g / L, the total phenol content is 1.5-2.5 g / L, and it is rich in short-chain fatty acids, polyphenolic compounds, amino acids, and other bioactive substances, exhibiting significant blood sugar lowering effects.

The invention relates to a method for preparing low-iron quartz sand and high-quality feldspar from lepidolite tailings. The method is characterized by comprising the following steps: (1) grinding pegmatite type lepidolite tailings, and screening to obtain mineral particles with the particle size of less than or equal to 0.35 mm; (2) sequentially carrying out medium magnetic separation, high-intensity magnetic separation and high-intensity magnetic separation on the-0.35 mm minerals to obtain magnetic separation fine sand and magnetic separation tailings; (3) scrubbing the magnetic separation fine sand to obtain desliming fine sand with higher purity; (4) the desliming fine sand is subjected to three-section flotation, the ore pulp concentration of first-section flotation is 35%-40%, H2SO4 serves as a pH adjusting agent, the pH is adjusted to 2-5, and mixed amine serves as a collecting agent of 0.10-0.15 kg / t; the ore pulp concentration of the second-stage flotation is 25%-30%, H2SO4 is used as a pH regulator, the pH is regulated to be 1-3, and an anion and cation collecting agent is 0.10-0.15 kg / t; the ore pulp concentration of the third-section flotation is 25%-30%, H2SO4 is used as a pH regulator, the pH is regulated to 1-3, the use amount of an anion and cation collecting agent is 1.25-2.25 kg / t, and feldspar and quartz fine sand are obtained. The method has the advantages that the prepared quartz fine sand meets the index requirements of quartz for optical glass or photovoltaic glass, and meanwhile, feldspar products for high-whiteness glaze and feldspar products for float glass are obtained.

The invention discloses a preparation method and application of a chromium-doped fullerene C20 catalyst. According to the invention, fullerene C20 is used as a carrier, chromium atoms are efficiently introduced into a carbon cage structure of fullerene C20 through chemical doping, and a stable active center with a strong electron coupling effect is successfully constructed. The method specifically comprises the following steps: dispersing fullerene C20 in toluene, carrying out ultrasonic treatment, adding chromium trichloride, carrying out a doping reaction under nitrogen protection, and carrying out centrifugation, washing and drying to obtain the target catalyst. The catalyst shows excellent performance in the reaction of catalyzing carbon dioxide hydrogenation to prepare formic acid, under the mild condition, the highest carbon dioxide conversion rate can reach 90.2%, the highest formic acid yield can reach 92.6%, and the catalytic activity retention rate is still 91.7% or above after the catalyst is recycled five times. The process is simple, the prepared catalyst has the advantages of high activity, high selectivity and high stability, and a new material is provided for efficient resource utilization of carbon dioxide.

The invention belongs to the technical field of livestock and poultry manure management and utilization, and provides a method for realizing emission reduction synergy of production of padding, greenhouse gas and active nitrogen gas through rapid and safe fermentation of cow dung residues under a cold condition, and a heating plate is arranged at the bottom of a pile body to realize heating of cold air output from an aeration pipe at the bottom; and in combination with the ascending flow of the air flow in the pile body, the whole large pile body at the upper part can be effectively heated, and the high-temperature period lasts until the fermentation is finished, so that a good fermentation effect is achieved. Start-stop feedback control of the heating plate is realized by monitoring the temperature of the pile body, so that the energy consumption is effectively reduced, and the cost is greatly reduced. The method has the synergistic effects of promoting efficient and safe fermentation of excrement to produce padding and reducing emission of harmful gases in the environment under the cold condition in winter, is simple to operate, realizes efficient value-added utilization of wastes, and has important value and significance for solving the practical problems of excrement treatment and resource utilization in dairy farms.

This invention discloses a method for resource recycling based on metal extraction from spent lithium-ion batteries, belonging to the field of electrocatalysis technology. The method includes the following steps: disassembling spent lithium-ion batteries and collecting cathode powder; mixing the cathode powder, distilled water, and a weak acid evenly; subjecting the resulting mixture to water bath heating and ultrasonic treatment to obtain a metal ion leaching solution; mixing the metal ion leaching solution with urea and ammonium persulfate, and transferring it to a reaction vessel containing a current collector for hydrothermal reaction, thereby growing an electrocatalytic electrode in situ on the surface of the current collector; wherein the current collector is a copper oxide nanowire loaded on a copper foam substrate. This approach eliminates the long process and high pollution steps of traditional metallurgy, upgrading low-value solid waste into high-value-added electrocatalytic materials, providing a new approach for the green closed-loop recycling of lithium-ion batteries and the low-cost manufacturing of electrocatalytic electrodes.

The present application provides a process for treating waste water generated in the process of preparing epichlorohydrin by direct oxidation method, which comprises a pretreatment section, a main reaction section and a deep treatment section; the pretreatment section comprises, in sequence, an adjusting unit, a tubular microfiltration unit, a mild wet oxidation unit and a neutralization unit, the main reaction section comprises an electrodialysis unit, an anaerobic biochemical unit, a biological reinforcement unit, an ozone catalysis I unit, a concentration and salt production system and a methane storage unit; the deep treatment section comprises, in sequence, an aerobic biochemical unit, an ozone catalysis II unit and a BAF unit, and the anion exchange membrane of the electrodialysis unit is a modified anion exchange membrane. The present application solves the problem of high toxicity of chlorine-containing organic matter in waste water by coupling mild wet oxidation with electrodialysis, and realizes the separation of organic matter and salt in waste water, wherein the electrodialysis uses a modified anion exchange membrane, and the anti-pollution capacity is greatly increased. The present application realizes zero discharge of waste water, and has the advantages of low operation cost.

This invention discloses a self-activated solid waste slurry and its preparation method, comprising waste slag, a solid waste cementitious material, and water. The components are expressed as follows by weight percentage or parts: 100 parts waste slag; 15-60 parts solid waste cementitious material, wherein the solid waste cementitious material consists of a silicon-aluminum rich precursor, a strongly alkaline activation source, and a rheology-modifying supplementary source, with a mass ratio of 1:(0.2-0.8):(0.1-0.4); and water. This invention eliminates the highly corrosive liquid chemical activator required in traditional alkaline activation materials, achieving self-activation through dry powder premixing of a strongly alkaline activation source, a silicon-aluminum rich precursor, and a rheology-modifying supplementary source.

The invention provides a converter dephosphorization and temperature control steelmaking method adopting sequential injection of lime and limestone, and relates to the technical field of metallurgical technology.In the converter steelmaking process, through the staged injection strategy that lime is injected first and then limestone is injected, and in the key limestone main injection stage, the converter dephosphorization and temperature control steelmaking is achieved; three key parameters including the molten pool temperature, the slag alkalinity and the FeO content are bound and cooperatively controlled with the limestone granularity and the injection parameters, the problem that in the prior art, the core contradiction between efficient dephosphorization and precise temperature control is insufficient to solve is solved, and refined control based on granularity-reaction kinetics is achieved. And the accuracy of dephosphorization and temperature control is improved.

This invention provides a method and application for preparing bio-organic fertilizer through synergistic composting of biochar-containing biogas residue, belonging to the field of organic fertilizer preparation technology. The method includes: preparing biogas residue through anaerobic fermentation of livestock and poultry manure and crop straw; adding biochar and a compound microbial agent; conducting high-temperature aerobic composting; and obtaining bio-organic fertilizer through maturation and aging. The amount of biochar added is 5%-10% of the dry basis weight of the composting raw materials; the aerobic composting time is 35-45 days; and the high-temperature composting temperature is 55-65℃. The compound microbial agent includes *Bacillus steatophilus*, *Bacillus amyloliquefaciens*, and *Bacillus mucilaginosus*. The bio-organic fertilizer obtained by this invention can be used for crop soil improvement. This invention, through the synergistic effect of biogas residue, biochar, and compound microbial agent, effectively shortens the composting cycle, improves compost maturity, reduces nitrogen loss, passivates heavy metals, and significantly improves the quality of organic fertilizer.

The invention provides a preparation method of oil-absorbing moisture-absorbing anti-skid sawdust applied to a kitchen waste machine, which comprises the following steps: crushing wood in a crusher to obtain sawdust, drying the sawdust in a dryer at low temperature to obtain dried sawdust, cooling the dried sawdust, putting the cooled sawdust in a stirrer, adding compound bacterial sludge, and stirring to obtain the oil-absorbing moisture-absorbing anti-skid sawdust. And starting the stirrer to fully mix the sawdust and the composite bacterial sludge to obtain the composite sawdust. Firstly, the prepared composite sawdust is put into a kitchen waste machine, then the kitchen waste is put into the kitchen waste machine, the kitchen waste machine is started for crushing, sewage and oil water seeping in the crushing process are absorbed by the composite sawdust, the sewage and the oil water are decomposed and degraded by the composite bacterial sludge in the composite sawdust, the situation that the environment is polluted when the kitchen waste serves as waste is prevented, and the environmental protection performance is improved.

The invention discloses a system for co-processing nitrogen-containing antibiotic mushroom dregs and synchronously denitrifying in a cement kiln and a use method thereof, which can realize harmlessness and recycling of hazardous wastes. Nitrogen-containing antibiotic mushroom dregs are quantitatively fed into a stepped gasification furnace, high-temperature hot flue gas at the tail of a cement kiln provides gasification energy for the stepped gasification furnace, nitrogen-containing organic matter in the mushroom dregs is converted into gasified gas mainly containing NHH, and the NHH can be directly used as a denitration reducing agent. An SNCR denitration process is coupled in a gasified gas conveying path, NH generated by gasification and ammonia water sprayed by SNCR form a combined reducing agent system, and the use amount of SNCR ammonia water is reduced. Part of cement raw materials are introduced into the stepped gasification furnace, and coking can be avoided while the gasification temperature field in the furnace is adjusted. Through the synergistic process of mushroom residue gasification, gasified gas denitration, residue combustion and raw material regulation, the environmental risk of mushroom residues is broken, and harmlessness and recycling of the mushroom residues are achieved.

This invention discloses a process for preparing modified silica from vanadium ore leaching tailings, belonging to the field of industrial waste treatment and utilization technology. The steps include: (1) non-grinding alkaline leaching of silica: vanadium ore leaching tailings are leached without grinding with sodium hydroxide and water in a certain ratio and then heated for leaching; after cooling, the residue and filtrate are obtained by solid-liquid separation, and the filtrate is water glass; (2) preparation and modification: self-composite electrolyte is added to water glass, and a new combination modifier is added, followed by acid neutralization to produce silica gel precipitate, which is dried and ground to obtain modified silica product; the electrolyte includes 60% to 80% sodium sulfate and 20% to 40% sodium carbonate by mass percentage; the modifier includes 40% to 80% hexadecyltrimethylammonium bromide and 20% to 60% sodium dodecyl sulfate by mass ratio. The process of this invention can turn the vanadium acid leaching tailings from clay vanadium ore into a valuable resource, achieving reduced treatment and resource utilization, while also producing high-quality silica products.

The application discloses a method for preparing organic fertilizer through grapevine branch-cow dung-microbial agent synergic fermentation, and belongs to the technical field of agricultural waste resource utilization and organic fertilizer preparation. The method comprises the following steps: after the grapevine branches are crushed, the grapevine branches are mixed with the cow dung at a mass ratio of 1: (1-2), microbial agents are added for composting, and organic fertilizer is obtained; and potting experiments are conducted to verify the fertilizer efficiency of the organic fertilizer. The method for preparing organic fertilizer through grapevine branch-cow dung-microbial agent synergic fermentation can convert grapevine branches into high-quality organic fertilizer, solves the problems of high lignification degree of grapevine branches, slow degradation of the grapevine branches alone, and long composting and decomposition period of the grapevine branches, improves the defects of imbalance of carbon and nitrogen ratio and high nitrogen loss rate of the cow dung alone, and improves the adaptability of composting raw materials by optimizing the mixing ratio of the grapevine branches and the cow dung. The method provides a typical example for agricultural waste resource utilization and promotes the development of circular agriculture.

This utility model discloses a lithium extraction device, comprising a liquid inlet structure and a liquid outlet structure, and further including a lithium extraction element having an active layer formed by the deposition of selective lithium extraction material particles; a support cylinder having an annular protrusion, a first support platform located inside the annular protrusion, and a second support platform located outside the annular protrusion; the lithium extraction element being detachably mounted on the first support platform; the liquid outlet structure being located on the backwater side of the lithium extraction element and connected to the support cylinder; a feed cylinder, the lower end of which is detachably mounted on the second support platform, and the liquid inlet structure being located on the water-facing side of the lithium extraction element and connected to the feed cylinder; and a pressurization structure including an air inlet pipe connected to the feed cylinder. This utility model's lithium extraction device allows for easy assembly and disassembly of the lithium extraction element, making it more convenient to use. Furthermore, by incorporating the pressurization structure, the efficiency of lithium ion extraction and elution can be improved.