5914 results about "Pulp and paper industry" patented technology

A system for recycling textiles includes a sorting module configured to automatically remove trims and to sort textiles into the fabric streams; a first decoloring system configured to receive the non-black and white cotton fabric stream and to provide a de-colored cotton fabric stream; a dry sanitization system configured to provide a sanitized cotton fabric stream and a sanitized polyester fabric stream; a second decoloring system configured to provide a semi de-colored cotton / polyester blend fabric stream; a fabric separation system configured to provide pure polyester fiber; a decoloring system configured to provide a de-colored polyester fabric stream; a cotton fiber recovery system configured to receive the de-colored or black or white and sanitized cotton fabric, and sanitized denim fabric streams; and a polyester fiber recovery system configured to receive the de-colored or black or white and sanitized polyester fabric streams.

The invention relates to the technical field of packaging, in particular to an intelligent metering method for remnant base paper rolls of a corrugated paper board assembly line. The intelligent metering method for the remnant base paper rolls of the corrugated paper board assembly line comprises steps as follows: a plurality of base paper feeding positions are arranged in the conveying direction of the assembly line at intervals, a base paper feeding frame is arranged in each base paper feeding position, and two base paper feeding rolls located on two sides of each base paper feeding frame are arranged on the base paper feeding frame; each base paper feeding roll is provided with lap recording sensors and incremental encoders, the lap recording sensors are used for monitoring the number of paper feeding laps of base paper clamped on the corresponding base paper feeding roll, the incremental encoders are used for monitoring the length of each lap after the base paper on the base paper feeding roll passes by one lap, and the lap recording sensors and the incremental encoders are connected with a controller. Intelligent metering can be realized, the operation cost of an enterprise is reduced, labor is saved, and the utilization rate of enterprise resources is increased.

The invention discloses a tea fertilizer preparation method based on microbial fermentation, and particularly relates to the field of tea compost, tea waste is crushed and wetted, and a nitrogen source and trace elements are added to optimize the carbon nitrogen ratio, so that a foundation is laid for the fermentation process; then, selected microbial strains are proliferated and purified, and the treated waste materials are uniformly inoculated with the selected microbial strains; in the fermentation process, the stability of fermentation conditions is ensured by controlling the temperature and the humidity; the tannin concentration and the pH value are monitored in real time, when the tannin concentration exceeds a preset value and the pH deviates from a normal range, the abnormal state of tannin degradation is evaluated and identified through a reaction activity index, an interference source is positioned through a sparse principal component analysis algorithm, and noise signals are removed; and after the interference source is positioned, the fermentation condition is adjusted in a targeted manner, so that the tannin degradation efficiency reaches the expectation, and the compost is maturely fermented and meets the fertilizer use standard.

The invention discloses a high-quality formed ginkgo wood furniture manufacturing and processing technology, and relates to the technical field of furniture production, and the high-quality formed ginkgo wood furniture manufacturing and processing technology comprises ginkgo wood selection, ginkgo wood treatment, wood modification, part processing and surface treatment. Before drying, the cut ginkgo biloba boards are subjected to primary treatment, surface impurities are removed, and primary balance treatment is carried out, so that stress concentration in the later drying process is reduced; primarily drying the primarily treated wood, adjusting the thickness and the drying temperature and humidity of the wood, adjusting the temperature in the drying chamber according to the thickness and the initial water content of the wood by using a combined drying technology, and controlling the distance between the wood to be 1 / 10-1 / 8 of the width of the wood through a circulating air drying system. By means of the combined drying technology, dynamic control over the ginkgo wood drying quality is achieved, the problems that the drying process is complex and wood is prone to warping or cracking during drying are solved, the drying period is shortened, wood deformation and cracking are reduced, the physical performance of the wood is improved, and the drying efficiency is improved.

The invention discloses a closed mixotrophic microalgae culture method and a culture system thereof, and relates to the field of microalgae culture, comprising the following steps: step one, microalgae culture, pouring culture solution into a culture tank, adding microalgae to be cultured into the culture solution, and then fixing a sealing plate to the tank mouth of the culture tank by bolts to carry out closed culture; step two, gas supply and nutrient solution addition, sending carbon dioxide from a pipeline into an air distribution pipe through an air pump in an air supply component, forming bubbles from a nozzle and transporting them into the culture solution, and part of the bubbles that rise are gathered by a baffle to extend their residence time in a water body; step three, illumination, during the day, a first electric telescopic rod drives an arc-shaped telescopic plate to move downward to expose the internal transparent culture tank, and sunlight provides a light source to propagate the microalgae. The application can extend the residence time of carbon dioxide in the water body, improve the utilization rate of carbon dioxide, and increase the yield of microalgae.

The present disclosure provides a straw and a straw bottle containing a combined straw. The straw includes a rigid tube, a hose sleeved to a bottom of the rigid tube, and an elastic installing base sleeved on an outside of the rigid tube. The elastic installing base is detachably sleeved in a drinking water outlet of a cover body. When a top cover is buckled with the cover body, the top cover presses the rigid tube, so that the hose is in a compression and bending state, and the straw is placed in the drinking water outlet. Thus, a user may disassemble and assemble the straw, which is convenient for the cleaning of the straw.

Disclosed are non-wood pulps having a fiber length greater than about 1.70 mm and a brightness of about 80% or greater. The relatively high degree of brightness is achieved without a loss fiber length or pulp yield. The high degree of brightness and relatively long fiber length makes the pulps well suited for the manufacture of wet-laid fibrous products, particularly wet-laid tissue products. The pulps may be prepared from plants of the family Asparagaceae by mechanical pulping and more preferably by a chemi-mechanical pulping using a sodium hydroxide alkaline peroxide solution where the primary pulp is cleaned to reduce debris prior to bleaching. Preferably the cleaned primary pulp has less than about 5% debris prior to bleaching.

The invention provides an anti-pilling wool fabric and a treatment method thereof, and belongs to the technical field of wool fabric processing. According to the treatment method for improving the anti-pilling performance of the wool fabric, the wool fabric with the anti-pilling performance is obtained, and the problems that in the prior art, in order to prevent pilling of the wool fabric, protease is used for treating the wool fabric, the efficiency is too low, and industrialization cannot be achieved are solved. Through the synergistic effect of the bacterial cellulose and the sericin, the anti-pilling performance of the wool fabric is improved, and the method is easy and convenient to operate, high in efficiency and suitable for industrial production.

The invention discloses an environment-friendly deformation-resistant reed wood composite shaving board and a preparation method thereof, and belongs to the technical field of boards. The reed wood composite shaving board is prepared from wood chips, reed fibers, basalt fibers, lignin fibers, plant extracts, nano silicon dioxide, acetylated distarch phosphate, a C30-45 alkyl cetearyl polydimethylsiloxane cross-linked polymer and a PEG-10 polydimethylsiloxane-vinyl polydimethylsiloxane cross-linked polymer according to a specific proportion. The adhesive is prepared from a methyl methacrylate cross-linked polymer, an MDI adhesive and an organic silicon waterproof agent. All the components are matched for use, the shaving board is prepared in a directional mode, the shaving board has excellent mechanical performance, crack resistance and deformation resistance, the environment-friendly performance is improved, and the use amount of glue is reduced. The novel formaldehyde-free adhesive and the plant extract are adopted to replace traditional formaldehyde-containing glue and a mildew-proof and insect-resistant agent, formaldehyde release is effectively avoided, and a healthier home decoration plate choice is provided for consumers.

The invention relates to a high-utilization-rate RAP asphalt regenerant and a preparation method thereof. The regenerant comprises the following components in percentage by mass: 30%-50% of a petroleum-based softener, 10%-20% of biomass oil, 5%-15% of a polymer modifier, 1%-5% of a surfactant, 0.5%-2% of an antioxidant and 2%-10% of a functional additive. All the components have a synergistic effect, so that the asphalt modifier can effectively permeate aged asphalt, supplement light oil, reduce viscosity, recover flexibility and remarkably improve high-temperature rut resistance and low-temperature crack resistance of regenerated asphalt. By reasonably selecting the raw materials and proportioning, the production cost is reduced, the RAP utilization rate is improved, and the environment-friendly raw materials are adopted, so that the requirements of environmental regulations are met. The result of the embodiment shows that after the regenerant is added, the performance recovery of the aged asphalt is good, the viscosity of the regenerated asphalt mixture is moderate, the needle penetration recovery rate is high, the softening point is high, the ductility is large, the comprehensive performance is excellent, and the regenerant is superior to commercially available products.

The present invention discloses a tensile and wear-resistant washed kraft paper and its preparation process, which relates to the technical field of kraft paper. The process includes the following steps: Step 1: Add color paste, waterborne acrylic resin, preservative, reinforcing agent, softening agent, curing agent, and waterproofing agent into a solvent in sequence and stir evenly to obtain a sizing slurry; Step 2: Coat the sizing slurry on the base paper, and successively perform extrusion, ultraviolet light irradiation, first drying, ironing, and second drying to obtain the tensile and wear-resistant washed kraft paper. In this application, by preparing specific reinforcing agent and waterproofing agent and introducing them into the sizing slurry for sizing, the interfacial action between the sizing slurry and the base paper is effectively improved, thereby improving the tensile and wear resistance of the washed kraft paper while enhancing the flame retardant performance; it can achieve the purpose of replacing plastic, leather, and cloth with paper.

The invention provides a lignocellulose straw with high bamboo powder content and a preparation method thereof. The lignocellulose straw comprises a straw body and a protective layer. The green degradable straw with the bamboo powder content as high as 90% can be prepared through the method. According to the method, lignin is used as a main body material, and a three-layer structure of a protective layer, a lignin straw and a protective layer is formed. And the protective layer is a naturally degradable protective film or an environment-friendly coating. The preparation method comprises the following steps: compounding bamboo wood, cellulose, a protective auxiliary agent and the like according to a ratio, then carrying out negative pressure dehydration, manufacturing into a straw by using a coiling machine with a specified size, drying, rapidly immersing the dried straw into a protective agent, then taking out and airing, and finally cutting into the straw with a specified length by using a pipe cutting machine. The straw effectively relieves plastic pollution, meanwhile, the bamboo wood is utilized in a high-efficiency and high-proportion mode to the maximum extent, and the bamboo wood utilization rate is far higher than that of products sold in the current market. The method has great industrial application value.

The invention discloses a laminated wood board production process, a laminated wood board and a board cutting machine, and belongs to the technical field of electrician laminated wood boards. The laminated wood board production process comprises the steps that S1, cutting is conducted, specifically, a board is obliquely cut to form veneers; s2, at least two single boards are bonded and spliced to form a laminate; s3, the laminate is placed in a hot press; s4, double-sided gluing is carried out on the laminated plate after hot pressing is completed; s5, the multiple laminates are stacked to form a plate blank, the bonding positions of every two adjacent laminates are arranged in a staggered mode, and the plate blank is placed in a pre-pressing machine to be pre-pressed; and S6, the pre-pressed plate blank is put into a hot press, the hot pressing temperature ranges from 120 DEG C to 140 DEG C, the plate blank is gradually pressed to the preset thickness, after the plate blank is pressed and formed and the temperature rises to the preset temperature, heat preservation forming is carried out, and cooling and discharging are carried out after forming. The production process solves the technical problem that the density of the electrical laminated board produced in a traditional mode is not uniform.

The invention discloses a wastewater degradation and recovery device for white spirit production, and particularly relates to the technical field of wastewater degradation, the wastewater degradation and recovery device comprises a treatment tank and an impurity storage box arranged on one side of the surface of the treatment tank and used for collecting impurities after wastewater treatment, and the other side of the treatment tank is further provided with an input and output assembly; sealing plates for isolating wastewater are arranged on the upper side and the lower side of an inner cavity of the treatment tank respectively, a sealing column is arranged on the opposite surfaces of the two sealing plates, a liquid storage tank is arranged on one side of the sealing plate located on the upper portion, and an air injection stirring assembly is arranged at the bottom of the sealing column. According to the wastewater degradation and recovery device for white spirit production, the mode that large bubbles are directly injected and scattered by a rotary stirring rod to form small bubbles is achieved through the arranged air injection stirring assembly, and meanwhile the injection mechanism is matched for synchronous operation, so that a flocculating agent is rapidly dispersed by means of bubble kinetic energy and the stirring effect, and the flocculation reaction is accelerated; the pollutants can be more quickly coagulated into large-particle flocs, and the wastewater purification efficiency is improved.

The invention relates to a method for recovering iridium from low-iridium-content wastewater, which comprises the following operation steps: (1) heating oxidation: adding a strong oxidant into the low-iridium-content wastewater for oxidation treatment, and mixing and stirring for reaction; (2) pH adjustment: slowly adding a sodium hydroxide solution under a stirring condition; (3) sulfuration precipitation: slowly adding a sulfuration precipitator under a stirring condition, heating to 70-80 DEG C, carrying out a constant temperature reaction, and cooling to room temperature; (4) flocculation and filtration: slowly adding a mixed flocculant under a stirring condition, standing, filtering, cleaning filter residues to be neutral, and draining water; (5) sulfuric acid digestion: putting the filter residues into a reaction container, slowly adding a dilute sulfuric acid solution under a stirring condition for soaking, cooling to room temperature after the reaction is completed, filtering, washing the filter residues to be neutral, and draining water; and (6) calcining: calcining the filter residues to obtain the iridium oxide. The method has good recovery capability on the low-content and high-impurity iridium wastewater.

The invention relates to a method for enhancing hydrolytic acidification performance of a mixed raw material by biogas residue biochar prepared from anaerobic fermentation discharged materials, and belongs to the field of anaerobic digestion of organic solid wastes. According to the method, the kitchen waste and the corn straw are used as the mixed raw material, the biogas residue biochar is prepared from the wet anaerobic digestion discharged material added with the shell powder and the nano ferroferric oxide, and the biogas residue biochar is applied to the acid production stage of the mixed raw material to improve the hydrolytic acidification performance, so that the hydrogen production performance, the system stability and the biogas production performance of the mixed raw material are improved. Compared with a control group, the accumulated hydrogen yield of the mixed raw material is increased by 126.8%-133.0%, and the maximum hydrogen production peak is increased by 48.7%-67.9%. The maximum daily volatile fatty acid yield of an anaerobic system is improved by 33.7%-51.4% compared with that of a control group, and the stability of the system is also obviously enhanced. In the biogas production stage, the biogas yield is improved by 42.0%-51.8% compared with that of a control group. The method can significantly improve the hydrolytic acidification and biogas production performance of the mixed raw material.

The present invention relates to a multilayer sheet liner for a food or beverage packaging material, the multilayer sheet liner comprising: a first ply comprising at least 70% by weight of unbleached kraft pulp and less than 30% by weight of neutral sulfite semi-chemical (NSSC) pulp, based on dry weight, and a second ply comprising at least 70% by weight of unbleached kraft pulp and less than 30% by weight of neutral sulfite semi-chemical (NSSC) pulp, based on dry weight, wherein the second ply comprises at least 50% by weight of NSSC pulp and less than 50% by weight of unbleached kraft pulp based on dry weight, and wherein the NSSC pulp in the second ply is a washed NSSC pulp having an ash content of less than 1.8% by weight as determined according to Standard ISO 1762: 2019. The invention relates to a method for manufacturing the multilayer sheet liner.

The invention provides a method for preparing beta-SiC containing a whisker structure from rice husks, and belongs to the field of comprehensive utilization of resources and inorganic non-metallic materials. The method comprises the following steps: carbonizing rice hulls in a protective atmosphere to obtain rice hull ash, removing impurities from the rice hull ash, and fully mixing the rice hull ash with NaCl and H3BO3 to obtain a rice hull ash mixture; and putting the two groups of rice hull ash mixtures into the same atmosphere furnace, introducing shielding gas, enabling the gas to sequentially pass through the H3BO3 mixture and the NaCl mixture in sequence, heating to 1300-1600 DEG C at a heating rate of 2-10 DEG C / min, performing high-temperature treatment for 1-5 hours, washing and drying the obtained solid, and firing in air to obtain beta-SiC. The silicon carbide product with high commercial value is prepared from the cheap rice hulls, hydrofluoric acid and other high-toxicity and high-corrosivity raw materials are not needed in the preparation process, the heat treatment temperature is low, large-scale production can be easily achieved, the problems that an existing industrial carbon thermal reduction method is large in process pollution and high in energy consumption can be solved, the production cost is reduced, and the method is suitable for industrial production. And industrial popularization and application are facilitated.

The invention relates to the field of bamboo shoot processing, in particular to high-temperature disinfection equipment for wild bamboo shoot processing, which comprises a base, a disinfection cylinder, a water outlet pipe I and the like, a disinfection cylinder is mounted on the base; a heating pipe is arranged in the disinfection cylinder; the disinfection cylinder communicates with a water outlet pipe I; an electric valve is arranged in the first water outlet pipe. Bamboo shoot strips are pressed into water through cooperation of a first plugging disc and an intercepting net, then the bamboo shoot strips are stirred through a stirring rod, bamboo shoot scraps float upwards after being separated from the bamboo shoot strips and are located above the first plugging disc, a first fan-shaped through groove is plugged through a second plugging disc, and the bamboo shoot scraps can only be located above the first plugging disc; and finally, the water and the bamboo shoot scraps above the plugging disc I flow into external storage equipment through a water outlet pipe II, so that the bamboo shoot scraps in the bamboo shoots are removed, and the situation that storage of the bamboo shoots is affected by microbial contamination, moisture transfer, enzymatic reaction, chemical reaction and other factors easily due to the boiled bamboo shoot scraps after subsequent high-temperature disinfection of the bamboo shoots is prevented. Therefore, the overall quality of the bamboo shoots is influenced.

The invention provides a plant fiber molding pulp suction device. The plant fiber molding pulp suction device comprises a pulp tank, a rack assembly, a transplanting mechanism and a pulp suction assembly, the transplanting mechanism is arranged on the rack assembly and is positioned above the pulp tank; a forming cavity is formed in the pulp suction assembly, a cavity opening of the forming cavity faces the liquid level of the pulp chest, and pulp enters the forming cavity through the pulp opening so as to complete pulp suction operation; the pulp suction device comprises a pulp suction assembly and a transplanting mechanism, the pulp suction assembly is connected with the transplanting mechanism, the transplanting mechanism drives the pulp suction assembly to lift up and down so that the pulp suction assembly can go deep into or be far away from the liquid level of the pulp chest, and the pulp suction assembly is connected with external control equipment and is matched with the transplanting mechanism so as to control the pulp suction device to complete pulp suction operation. According to the plant fiber molding pulp suction device, it can be guaranteed that the wall thickness of a container product is uniform, the product percent of pass of the container product is increased, and the market requirement is greatly met.

The invention discloses a residual sludge resource utilization method and a method for preparing amino acid liquid fertilizer, and the method comprises the following steps: 1) taking residual sludge as a compost raw material and plant straw as an auxiliary material, mixing to obtain an initial compost substrate, and carrying out aerobic composting; 2) taking compost products in the middle and later periods of the high-temperature period of compost, drying, sieving, grinding, adding a Ca (OH) 2 solution into the ground compost products, mixing, then shaking for 30-120 minutes, carrying out solid-liquid separation, and taking liquid to obtain the amino acid liquid fertilizer; and continuously composting the remaining solid substances, and using the solid substances for land utilization after composting is finished. The amino acid liquid fertilizer is prepared from municipal sludge and straw compost, resource recycling is economically and effectively conducted on amino acid in the amino acid liquid fertilizer, the prepared amino acid liquid fertilizer is rich in amino acid variety and higher in amino acid content, the needed time is short, energy consumption is reduced, and the production cost is reduced. And a green way is provided for safe treatment and high-value recycling of the residual sludge of a sewage treatment plant.

The invention discloses a continuous turning and discharging compost fermentation device and a treatment method thereof, and belongs to the technical field of compost ferment.The continuous turning and discharging compost fermentation device comprises a compost fermentation tank, and a compost feeding mechanism, a fermentation assisting mechanism and a continuous collecting mechanism are sequentially arranged on the compost fermentation tank from top to bottom. Through cooperation of the feeding hopper and the collecting hopper, a continuous feeding and discharging mechanism is constructed, and after being covered by bacterial powder in the dust box, an input new material is mixed with a semi-cured material to form a strain relay transmission mode, so that the operation efficiency of the compost fermentation tank is effectively improved, the material turning and discharging continuity of the compost fermentation tank is improved, and the labor intensity of workers is reduced. And external air introduced through the ventilation window can reduce the temperature gradient of the semi-finished fertilizer and preheat the newly fed material by using the waste heat of the pile body, so that the overall energy consumption of the device is reduced, the inactivation of mesophilic flora due to local overheating is avoided, and the activity of the fermentation bacterial colony in the fermentation process is remarkably improved.

The invention discloses a waste rubber material cleaning device for tire tread calendaring processing, which comprises a calendaring rack, mounting plates are fixedly connected to both sides of the outer surface of the calendaring rack, calendaring rollers are rotatably mounted on the inner surface of the calendaring rack, and cleaning through grooves are formed in the lower ends of the surfaces of both sides of the calendaring rack. Square combined barrels are fixedly connected to the two sides of the surface of the bottom of the calendering rack, a receiving barrel is mounted on the outer surface of the calendering rack in a sleeving mode, the receiving barrel is connected to the outer side of a cleaning through groove in a sleeving mode, square mounting holes are formed in the two sides of the outer surface of the receiving barrel, and square mounting rods are fixedly mounted in the square mounting holes; and meanwhile, the auxiliary barrel and the negative pressure fan are installed through the circular barrel, negative pressure extraction can be conducted for adsorption, the waste concentration efficiency and stability are guaranteed, and combined installation and use are convenient.

The invention provides a method for resourceful treatment of blue-green algae and reed straws, which comprises the following steps: (1) mixing dehydrated blue-green algae, crushed reed straws and water to obtain a mixture to be fermented; (2) introducing the to-be-fermented mixed material into an acidification hydrolysis fermentation tank, adding a first bacterial liquid, introducing protective gas, and carrying out acidification hydrolysis fermentation in a closed environment to obtain a fermented mixed material; (3) when the pH value and the acetic acid volume content of the fermented mixture reach target values, releasing the closed environment, and performing solid-liquid separation to obtain biogas slurry and biogas residues; (4) introducing the biogas slurry into an anaerobic methanogenesis fermentation tank, adding a second bacterial liquid, introducing protective gas for anaerobic methanogenesis fermentation, and collecting produced methane gas; and (5) introducing the biogas residue into an aerobic fermentation tank, adding an aerobic fermentation bacterial liquid, carrying out aerobic fermentation, and collecting the produced finished product organic fertilizer. According to the method provided by the invention, efficient reutilization of the blue-green algae and the reed straws is realized, the treatment efficiency and the gas production rate are improved, and large-scale popularization and application are facilitated.

The invention discloses a method for preparing high-quality dissolving pulp from low-grade plant fiber raw materials, and belongs to the technical field of biomass pulping. The preparation method comprises the following steps: screening a low-grade plant fiber raw material to obtain a fiber raw material of which the length is 20-30 mm, the width is 10-15 mm and the thickness is 3-5 mm; carrying out deep prehydrolysis-sulfate cooking treatment on the screened fiber raw materials to obtain unbleached sulfate pulp fibers; performing deep eutectic solvent and elemental chlorine-free bleaching treatment on the unbleached sulfate pulp fiber to obtain paper pulp fiber with low kappa number; and carrying out biological enzyme treatment on the paper pulp fibers with low kappa number to obtain the high-quality dissolving pulp. According to the method, the morphology and the structure of chemical pulp fibers are effectively regulated and controlled by designing deep eutectic solvent treatment, and deep dissolution of residual hemicelluloses and lignin is achieved; through biological enzyme treatment, the alpha-cellulose content and the Fock reaction performance are further improved, and finally the high-quality dissolving pulp is prepared.

The invention relates to the technical field of concrete product production, in particular to a residual slurry circulation formula, which comprises the following components by weight: 350-450kg / m < 3 > of cement; sand grains are 750-800 kg / m < 3 >; stone blocks are 900-1000 kg / m < 3 >; the residual slurry is 200-300kg / m < 3 >; 8.5-10.5 kg / m < 3 > of a water reducing agent; 80-85 kg / m < 3 > of water; and 20-25 kg / m < 3 > of an enhancer. According to the prepared residual slurry circulation formula, the residual slurry is mixed with new cement, active substances in the cement are supplemented, then sand grains and stones are added as aggregates and fill gaps, and sodium gluconate and silica fume are used in a matched mode, so that the water consumption is reduced, meanwhile, the mechanical strength of the recycled residual slurry after solidification is improved, and the service life of the residual slurry is prolonged. The residual slurry can be cyclically put into the production process, and the method has the beneficial effects of being environment-friendly and reducing the production cost.

The invention relates to the technical field of sewage treatment, in particular to a method for improving the denitrification nitrogen removal performance of a corn or rice straw fermentation carbon source by using industrial glucose. According to the method, the straws are soaked and pretreated by adopting calcium peroxide, and meanwhile, in the anaerobic fermentation process, the anaerobic condition is kept through nitrogen, and zero-valent iron is added to obtain the straw fermentation liquor. Fermentation liquor and industrial glucose are mixed to serve as a composite carbon source, the activity of microorganisms in a sludge system is stimulated through the usability of the glucose, and the utilization rate of the microorganisms to the rice and corn fermentation liquor carbon source is increased; anaerobic fermentation conditions of rice and corn straws are optimized, the carbon source release rate is increased, the complexity of carbon source composition of fermentation liquor is utilized, the diversity of microorganisms is improved, excessive propagation of the microorganisms is avoided, and the biological denitrification capacity is improved. The method disclosed by the invention is beneficial to resource utilization of agricultural wastes, reduces the biological denitrification cost of sewage with a low carbon-nitrogen ratio, and promotes green and low-carbon development of sewage treatment.

The invention discloses a method for producing biogas by strengthening antibiotic mushroom dregs through co-anaerobic fermentation treatment, and belongs to the technical field of biomass waste resource utilization. The method comprises the following steps: (1) acclimatization of an inoculum: taking cow dung as the inoculum, adding a mixture of straw and water every day for acclimatization, acclimatizing for 18-20 days, and collecting gas and collecting discharged materials every day according to set acclimatization time; and (2) anaerobic fermentation: taking antibiotic mushroom dregs, straws and water as raw materials, feeding the discharged material collected in the step (1) every day, carrying out anaerobic fermentation for 18-20 days, and carrying out gas collection and discharged material collection every day according to the set anaerobic fermentation time. According to the method, co-anaerobic fermentation is adopted to treat the antibiotic mushroom dregs, so that the yield of biogas and methane is effectively increased, meanwhile, the utilization rate of the antibiotic mushroom dregs is remarkably increased, and the problem of independent anaerobic fermentation inhibition of the antibiotic mushroom dregs is solved.

A method of producing a 3D molded product comprises applying a pulp slurry layer to a porous forming face of a first mold, pressing the pulp slurry layer against the porous forming face of the first mold, while heating the pulp slurry layer and drawing a vacuum through the porous forming face of the first mold, transferring the pulp slurry layer to a porous forming face of a second mold, in a subsequent forming step, pressing the pulp slurry layer against the porous forming face of the second mold, while heating the pulp slurry layer and drawing a vacuum through the porous forming face of the second mold. In the method, a first pressure at the rear side of the forming face of the porous forming face of the first mold is lower than a second pressure at the rear side of the porous forming face of the second mold.