319 results about "Rice straw" patented technology

The invention discloses a rice straw decomposition process full life cycle monitoring system based on a cloud platform, and relates to the field of agricultural informatization, and the system comprises a field data collection terminal which is used for collecting near infrared spectrum data, image data and operation and environment data of a straw decomposition process; the layered identification and modeling unit is used for identifying initial mass proportions and decomposition progress of soluble components, cellulose components, hemicellulose components and lignin components of the straws, and establishing a layered progress bar; the fusion progress calculation unit is used for weighting each layered progress bar based on the initial mass ratio to generate an overall decomposition progress bar; the progress output unit is used for simultaneously outputting a layered progress bar and an overall decomposition progress bar; and the mode mining unit is used for clustering the historical layered progress bars, forming a progress category prototype library and outputting potential blocking reasons. The problems that the field straw decomposition process is difficult to monitor in real time and the blocking reason is difficult to identify are solved.

The invention discloses streptomyces DLS188 and application thereof, and belongs to the technical field of microorganisms. The preservation number of the strain is CGMCC (China General Microbiological Culture Collection Center) No.33250. The strain is high in humic acid production capacity when being used for fermenting lignocellulose, and the strain is used for fermenting rice straw powder and wheat bran to prepare DLS188 bacterial fertilizer. After the DLS188 bacterial fertilizer is added into soil and wheat is sown, agronomic characters such as the plant height, the leaf length and the leaf number of the wheat can be remarkably promoted. Research on the soil after wheat sowing is completed shows that the addition of the DLS188 bacterial fertilizer significantly changes the microbial community of the soil, increases the diversity and abundance of the microbial community, and increases the content of humus in the soil. It is further shown that the DLS188 bacterial fertilizer is beneficial to adjustment of the soil microbial community structure and can be used for soil improvement. And the method has important significance for realizing resource utilization of agricultural straws.

The invention discloses Aspergillus sp. DLF18 and application thereof, and relates to the technical field of microorganisms, and the preservation number of the Aspergillus sp. DLF18 is CGMCC (China General Microbiological Culture Collection Center) NO.41737. The strain can effectively utilize rice straws and / or bagasse to produce humic acid, and the content of humic acid in each gram of fermentation supernatant after the rice straws are fermented is 16.5%. When the DLF18 fermentation product is applied to crops, the growth condition of the crops can be remarkably improved, and the humus content in soil is increased. Meanwhile, a metagenomics analysis result shows that compared with a control group, after the DLF18 is applied into the soil, the species beta diversity is remarkably changed, and the functional gene abundance and the inter-group difference are remarkably changed. Therefore, the DLF18 has a wide application prospect in the aspects of agricultural straw utilization and soil remediation.

The invention discloses an intelligent control system and method for wet raking and field returning operation of rice straw based on the Internet of Things, particularly relates to the field of agricultural machinery automation, and is used for solving the problems of tilling depth fluctuation, straw floating and winding and uneven burying thickness caused by muddy water in traditional wet raking operation. The method comprises the following steps: acquiring torque and position information of a rotary blade shaft in real time, establishing a torque sequence and a position index, executing edge detection on the sequence to divide stable sections, generating section labels, matching an action template from a rule base, issuing a tilling depth adjustment and speed correction instruction, and recovering an execution receipt to evaluate torque response. The burying uniformity and the tilling depth stability are calculated and written into a quality account book, and adjacent section optimization strategy switching is retrieved; torque is used as core sensing, sectionalized intelligent regulation and control of the operation process are achieved, continuous and consistent burying and ground surface smoothness are guaranteed, and operation efficiency and quality are improved.

The invention discloses Penicillium chrysogenum DLS189 and application thereof, and relates to the technical field of microorganisms, and the preservation number of the Penicillium chrysogenum DLS189 is CGMCC (China General Microbiological Culture Collection Center) NO.41739. The invention further discloses a preparation method of the Penicillium chrysogenum DLS189. The strain can effectively utilize rice straws and / or bagasse to produce humic acid, and the content of humic acid in each gram of fermentation supernatant after the rice straws are fermented is 16.84%. When the DLS189 fermentation product is applied to crops, the growth condition of the crops can be remarkably improved, and the humus content in soil is increased. Meanwhile, a metagenomics analysis result shows that compared with a control group, after the DLS189 is applied into the soil, the species beta diversity is remarkably changed, and the functional gene abundance and the inter-group difference are remarkably changed. Therefore, the DLS189 has a wide application prospect in the aspects of agricultural straw utilization and soil remediation.

The invention belongs to the technical field of microbial fermentation and biological agriculture, and discloses a rice straw decomposition agent as well as a preparation method and application thereof. The rice straw decomposition agent is obtained by adopting bacillus megatherium (Bacillus megatherium) Z101 to be subjected to fermentation culture after activation of the bacillus megatherium Z101. The application method comprises the steps that harvested rice straw is flatly laid in a rice field, the water level of the rice field is kept to submerge the rice straw, then the rice straw decomposition agent is diluted with water and then sprayed to the surface of the laid rice straw for decomposition fermentation treatment, and decomposed rice straw is obtained. The rice straw decomposing inoculant is a fermentation culture solution of bacillus megatherium Z101, and compared with a fermentation culture solution obtained by conventional bacillus megatherium in the market, the rice straw decomposing inoculant has higher rice straw decomposing efficiency and speed, in-situ decomposing and field returning of rice straw are facilitated, and a new application way is provided for the bacillus megatherium Z101.

The invention discloses artificial soil based on manganese slag, red mud and ardealite. The artificial soil is mainly prepared from a manganese slag-red mud-ardealite mixed matrix and a modifier, the weight ratio of the manganese slag to the red mud to the ardealite in the manganese slag-red mud-ardealite mixed matrix is (0.4-1.6): (0.1-0.5): (0.5-0.9); the modifier comprises calcium oxide, and further comprises rice straw, biochar, zeolite or a combination thereof, and the modifier accounts for 1-15% of the weight of the artificial soil. Accordingly, a corresponding preparation method is also established. According to the method, the three solid wastes are mixed according to the characteristics, so that specific pollutants such as ammonia nitrogen, phosphorus, fluorine and Mn < 2 + > can be fixed, the reduction of heavy metals is realized, the nutrients beneficial to plant growth are reserved, the artificial soil with rich nutrients is synchronously reconstructed, the qualitative change from waste residues to resources is realized, the process is simple, and the effect is good. The obtained artificial soil can be used for greening planting, supplementing manganese ore, aluminum ore and phosphorite surrounding soil deficiency areas, and solving the problems of no soil, ploughability and ecological restoration of mining areas.

The invention belongs to the technical field of microbial fermentation and biological agriculture, and discloses a soil remediation fungicide as well as a preparation method and application thereof. The preparation method comprises the following steps: activating bacillus megatherium Z101, inoculating the activated bacillus megatherium Z101 into fermentation liquor containing rice straw powder, carrying out fermentation culture, and carrying out vacuum spray drying on fermentation mixed liquor after fermentation is completed, so as to obtain soil remediation bacterium powder; or further mixing the soil remediation bacterium powder with auxiliary materials and water, and granulating to obtain the soil remediation bacterium granules. The application method comprises the following steps: in a rice planting stage, applying the soil remediation fungicide and an inorganic fertilizer together to remedy rice field soil and promote rice growth. The soil remediation fungicide prepared by fermentation culture of the bacillus megatherium Z101 has remarkable advantages in the aspects of rice yield increase, soil pH value increase and physicochemical property improvement, and a new application way is provided for the bacillus megatherium Z101.

The straw collecting and granulating device comprises a harvester body, a header assembly and a driving assembly, the driving assembly comprises an engine, a transmission assembly, a feeding assembly and a granulating assembly are arranged on the harvester body, the feeding assembly is connected with the right end of the header assembly, and the granulating assembly is connected with the right end of the header assembly. The feeding assembly comprises a feeding frame and a conveying mechanism, a first feeding port is formed in the left end of the feeding frame and connected with the header assembly, the granulation assembly is arranged below the feeding frame, one end of the transmission assembly is connected with the engine, and the other end of the transmission assembly is connected with the first driving shaft. According to the straw collecting and granulating device changed from the small-sized harvester, the small-sized crawler-type harvester is used as a main body for improvement, additional power is not needed, function conversion from threshing operation to straw collecting and granulating operation is achieved, and the straw collecting and granulating device is suitable for operation of small-area field parcels in the south, and flat-die granulating and field in-situ discharging of pure rice straw are completed.

The invention belongs to the field of soil environment pollution simulation and prediction, and provides a prediction method based on a two-point chemical unbalanced model, which is used for quantitatively evaluating the effect of regulating and controlling the migration behavior of p-nitrophenol in acid red soil by straw stalk biochar. According to the method, a biochar-red soil composite medium system is constructed, a soil column leaching experiment is carried out to obtain penetration curve data, a two-point chemical unbalance model in CXTFIT software is utilized to carry out parameter inversion, and key parameters such as a retardation factor, a two-region distribution coefficient, a mass transfer coefficient and a liquid phase degradation coefficient are accurately identified. Model verification shows that the goodness of fit is high, and a parameter change rule reveals the inherent mechanism of enhancing the pollutant retention capacity, changing the proportion of fast and slow adsorption sites and influencing mass transfer kinetics by the biochar. Based on the verified model, the long-term migration behavior and pollution risk of p-nitrophenol under different environmental conditions can be simulated, and a scientific basis is provided for groundwater pollution control and remediation strategy optimization.

The invention belongs to the technical field of organic fertilizers, and discloses an organic fertilizer for improving rice quality under saline-alkali stress, which comprises chicken manure, rice straw, modified attapulgite and a compound microbial agent. The invention also discloses a preparation method of the organic fertilizer. The preparation method comprises the following steps: S1, pretreating and mixing the raw materials; s2, inoculating with a complex microbial inoculant; s3, staged composting control; and S4, post-processing. A chicken manure-rice straw-heat modified attapulgite-complex microbial inoculant system is constructed, the problems of long composting period, incomplete saline-alkali soil improvement, insufficient crop stress resistance and the like in the traditional technology are solved, the composting efficiency is improved, the pH and conductivity of the saline-alkali soil are reduced, meanwhile, the tillering ability and root activity of rice are enhanced, and the yield of the rice is increased. A closed loop of agricultural waste recycling, soil remediation and crop quality improvement is formed, and the comprehensive benefits are superior to those of an existing single technology.

The invention provides a soil conditioner and a preparation method and application thereof, ardealite and rice straw are mechanically crushed, and the crushed ardealite and rice straw are respectively pretreated with a tannic acid solution and a potassium hydroxide solution. The pretreated ardealite and rice straw are dried and placed in inert gas and water vapor to be mixed and calcined, a solid product, humic acid, bentonite, sodium lignin sulfonate and polyacrylamide are mixed and smashed, and the conditioner for soil improvement is obtained after granulation. The soil conditioner is prepared by synergistically calcining the ardealite and the rice straws, the problems that the pH is low, harmful elements are easy to overflow and the like when the ardealite is independently used as a soil conditioner are solved, a new way is provided for comprehensive utilization of the ardealite, and the prepared soil conditioner has the function of slowly releasing nutrient elements of potassium, sulfur and calcium and has a good application prospect. The soil conditioner has the effects of regulating soil bulk density, loosening soil, retaining water and improving soil fertility durability in the aspect of improving soil quality.

The invention discloses a calcium-enriched rice straw biochar core-shell particle soil conditioner, which belongs to the technical field of soil improvement and farmland water environment governance, and comprises the following components: a calcium-enriched rice straw biochar core, desulfurized gypsum, a binder and a functional auxiliary agent, the binder is selected from one or more of starch, lignosulfonate, sodium carboxymethyl cellulose and sodium alginate; the functional additive is selected from one or more of humic acid, trace element fertilizer and organic fertilizer; through the comprehensive design on the material structure, the Ca < 2 + > slow release mechanism and the application system, calcium and sodium replacement and soil salinity and alkalinity reduction, flocculation and sedimentation of soil colloid in an alkaline environment, blocking and weakening of a soil-water interface colloid pollution channel and continuous improvement of the soil structure and fertility are synergistically realized.

The application discloses a kind of rice field soil arsenic pollution reduction repair method, comprising the following steps: S1, rice seedling raising;S2, in 1-2 weeks before transplanting, to the arsenic pollution rice field soil to be repaired modified biochar is added, then waterlogging treatment is carried out;S3, 1-2 weeks later, shallow water rice transplanting is carried out, and 3-5 days are waited for rice seedling to return green, and water is intensified management;S4, in early heading stage of rice, aboveground rice straw is harvested from field, then soil ploughing is deep ploughing and broken, irrigation is carried out, so that root system floats to water surface, and is all collected from field;S5, level field and drain to surface layer contains shallow water, repeat steps S2-S4.The application is loaded on biochar by microorganism and combined with the method of water intensification management plant absorption, in heading stage of rice, aboveground straw enriched with arsenic is removed from field with underground root system as a whole, and combined with periodic repetition operation, the total amount of arsenic in soil is substantially reduced.

The invention discloses a modified raw soil material based on copper tailings and a preparation method thereof, and belongs to the technical field of building materials. The performance of a traditional raw soil material is optimized by using an alkali activator solution (prepared from a sodium hydroxide solution and a sodium silicate solution), copper tailings, sodium carboxymethyl cellulose, ceramic fragments and the like, and the reasonable adding amounts of the materials are as follows: 10% of copper tailings, 2% of sodium hydroxide, 4% of sodium silicate, 4% of sodium carboxymethyl cellulose, 4% of ceramic fragments and 0.6% of straw. The mechanical property, the water resistance and the like of the modified immature soil material are obviously improved, the copper tailings can be subjected to reduction, recycling and harmless utilization, the immature soil material has better regeneration value and environmental benefits, and the prepared immature soil material can be effectively applied to the fields of immature soil building reinforcement, cultural relic and ancient building restoration, civil engineering and the like.

The application discloses a dye degradation system and method with rice straw as a carbon source, and belongs to the technical field of wastewater treatment. The application successfully constructs an economical combined degradation system by combining the ability of white rot fungi to decompose macromolecular organic matter and the characteristics of the power generation microorganism MR-1 to degrade pollutants in a broad spectrum and efficiently. The system uses rice straw as a carbon source, uses white rot fungi to degrade the rice straw, obtains a degraded straw solution, and then uses the power generation microorganism MR-1 to perform anaerobic respiratory metabolism on the degraded straw solution, releases electrons, and transmits the electrons to dye pollutants, so as to degrade dye wastewater. The combined degradation system can not only make up for the deficiency of the power generation microorganism MR-1 in utilizing macromolecular organic matter carbon sources, but also can significantly reduce the cost of carbon sources, and simultaneously realize the dual goals of wastewater treatment and solid waste resource utilization. The method is environmentally friendly, treats waste with waste, and has potential to be popularized and applied in practical application.

The invention relates to the technical field of microorganisms, in particular to a saline-alkaline-tolerant bacillus velezensis JT6, a cellulose degrading enzyme secreted by the same and application of the saline-alkaline-tolerant bacillus velezensis JT6. The bacillus velezensis JT6 disclosed by the invention is preserved in the China General Microbiological Culture Collection Center, the address is Institute of Microbiology, Chinese Academy of Sciences, 3 #, No.1 yard, West Beichen Road, Chaoyang District, Beijing, the preservation date is December 5, 2025, and the preservation number is CGMCC No.36918. The bacillus velezensis JT6 disclosed by the invention can be used for preparing the bacillus velezensis JT6. The strain has cellulose degradation activity, the degradation rate of corn straw is 48.8%, and the degradation rate of rice straw is 24.92%. The strain provided by the invention is used for rapid decomposition of straw returning, is safe to human and livestock, has no pollution to the environment, and has good development and application prospects.

The invention discloses an HPCACM-coated Co3O4 composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing rice straw source cellulose; preparing rice straw source cellulose acetate (CA); preparing a hollow porous cellulose acetate fiber membrane (HPCAFM); preparing a hollow porous cellulose acetate derived carbon fiber membrane (HPCACM); and preparing the HPCACM-coated Co3O4 composite material. The prepared HPCACM-coated Co3O4 composite material is prepared based on straw, has a high specific surface area and a unique micro-mesoporous hierarchical structure, provides a rich active interface for a catalytic reaction, is beneficial to promoting mass transfer of reactants and products, efficiently activates potassium hydrogen persulfate, realizes high-value utilization of agricultural wastes, and improves the water pollution treatment efficiency.

The application provides a preparation of a fermentation bed and application of waste of the fermentation bed in preparation of special organic fertilizer for rice, belongs to the technical field of livestock breeding, and specifically relates to a fermentation bed for cattle breeding, which comprises raw materials: rice straw, rice husk, quicklime, corn flour, wheat bran, sawdust and mixed bacteria liquid A; the mixed bacteria liquid A comprises Bacillus subtilis, Clostridium butyricum, Rhodopseudomonas palustris, Saccharomyces cerevisiae and Lactobacillus acidophilus; and a special organic fertilizer for rice, which comprises components: the above-mentioned waste fermentation bed, rice straw, rice husk, wood ash, mixed bacteria liquid B and mixed enzyme preparation; the provided fermentation bed can effectively degrade cattle manure, solve the problem of dirty and smelly breeding environment, and effectively reduce the incidence of diseases such as cattle diarrhea; and the provided special organic fertilizer for rice meets the nutritional requirements of rice planting, improves the yield and stress resistance of rice, and prevents or reduces the occurrence of diseases.

This invention discloses a rice straw-based liquid mulch film emulsion, its preparation method, and its application. The preparation method includes: treating pretreated rice straw with an alkaline solution in sodium hydroxide to obtain rice straw fibers and a silicon-containing black liquor; washing and bleaching the rice straw fibers to obtain bleached rice straw fibers; allowing the silicon-containing black liquor to stand, adjusting the pH value, and allowing it to stand again to obtain a silicon-containing dispersion; mixing and activating the bleached rice straw fibers with an alkaline alcohol solution, followed by etherification with chloroacetic acid to obtain carboxymethyl cellulose; mixing polyvinyl alcohol and carboxymethyl cellulose solutions, adding the silicon-containing dispersion under stirring, and then adding water to obtain the rice straw-based liquid mulch film emulsion. The rice straw-based liquid mulch film emulsion prepared by this invention can be used for soil covering in cultivated soils, exhibiting excellent film-forming strength, toughness, light-blocking properties, and soil cover adaptability. It has a wide range of raw material sources, a simple preparation process, and is suitable for large-scale promotion.

The invention discloses a test method for cultivating volvariella volvacea by using mushroom residues and straw as main materials. The test method comprises the following steps: S1, pretreating raw materials; s2, preparing a cultivation material; s3, spreading materials and sowing seeds; and S4, spawn running and fruiting management. The shiitake mushroom residues and the straw are pretreated, meanwhile, the proportion is optimized, the raw material cost is remarkably reduced, the advantages of the two raw materials are complementary, the shiitake mushroom residues provide part of quick-acting nutrients and mycoprotein, the porosity and water binding capacity of the substrate are improved through the straw, the carbon nitrogen ratio of the substrate is increased through cooperation of the shiitake mushroom residues and the straw, and the yield of the substrate is increased. And adjusting to a range more suitable for growth of volvariella volvacea. And rapid planting of hyphae is promoted, and the primordium density and the sporocarp yield are improved.

The application discloses a reverse making method of terraced rice picture and belongs to the field of straw picture, and comprises the following steps: S1, breeding color rice varieties with different color and plant height, and carrying out planting and management according to the characteristics of terraces; S2, designing a plane pattern by using PS and AI; S3, importing the plane pattern into CAD and adjusting the angle and perspective; S4, measuring the position and range of the rice field picture area field plot and the height difference of the field ridge; S5, discharging the whole pattern in the reverse direction of the field ridge by using the Ovi interactive map, and adjusting the position and angle of the field ridge in the picture to be optimal; and S6, placing the converted pattern in the rice field by using a positioning instrument and placing and planting. The terraces are curved, the field ridge is high, the field plot surface is small, and the rice field picture cannot be made like the basin or the plain, the application adopts a reverse terraced picture making technology, the technology overcomes the disorder and the broken feeling caused by the large height difference of the terraces, the small field plot and the large bending degree, and improves the overall viewing effect of the picture.

The present application relates to the field of agricultural technology, and provides a preparation method of a straw-derived organic calcium conditioner and application of the straw-derived organic calcium conditioner in red soil hardening repair, solves the problem that existing conditioners do not have a slow-release effect, and the effect of red soil hardening reduction, acid improvement and crop yield increase after application of the conditioner is poor, and comprises the following steps: S1, raw material pretreatment and compounding: pulverizing rice straw and mixing the rice straw with oyster shell powder to obtain mixed raw materials; S2, pyrolysis treatment is performed on the mixed raw materials, and volatile components generated in the pyrolysis process are recovered through a condensation system; S3, organic acid activation: the pyrolysis and carbonization products are mixed with an organic acid activation liquid to obtain activated carbonization products; S4, chimeric and mechanical activation: the activated carbonization products are mixed with polyethylene glycol and subjected to ball milling treatment; S5, polymer cross-linking reaction: polyvinyl alcohol and citric acid are added and mixed for reaction; and S6, shaping and granulation: shaping treatment is performed to obtain the straw-derived organic calcium conditioner.

The invention discloses a method for preparing copper and tellurium by reducing copper tellurite slag through rice, and belongs to the field of metallurgical energy conservation and emission reduction and comprehensive utilization. The method provided by the invention comprises the following steps: washing, chopping and air-drying rice straws; fully mixing the treated crushed rice straw with the copper tellurite slag by using a ball mill; putting the mixed substances into a hydraulic tablet press, and pressing the mixed disintegrating slag into balls; carrying out two-stage vacuum pyrolysis reaction on the pretreated spherical mixture, wherein the first-stage reaction temperature is 350-500 DEG C; the reaction temperature of the second stage is 800-900 DEG C; and preparing to obtain metal copper and metal tellurium. The method overcomes the bottlenecks of pollution gas generation, pollution waste acid water generation, strong acid addition, long flow, complex process and the like in the traditional separation means of copper and tellurium in copper tellurite, realizes the separation of copper and tellurium in industrial grade copper tellurite compared with the traditional pyrolysis mode, and has the characteristics of environmental friendliness, low cost, stable product quality, easy realization of industrialization, and the like. And the like.

The invention discloses a charcoal-based composite material as well as a preparation method and application thereof, and belongs to the technical field of soil improvement. The preparation method comprises the following steps: modifying rice straw with calcium lignosulphonate, carbonizing to obtain biochar, and co-fermenting with calcium lignosulphonate, rice straw, EM engineering bacteria and urea to obtain the biochar-based composite material. When in use, the charcoal-based composite material is uniformly spread on the surface of acidified soil, ploughing and mixing are performed, irrigation and mulching film covering are performed, and crops can be planted 30-120 days later. When the biochar-based composite material is used for soil improvement, the pH value of acidified soil can be remarkably increased, the non-uniform acidification characteristic of the soil is improved, the physical property and the soil fertility are improved, and the biochar-based composite material has the advantages of being low in remediation cost and free of chemical components and can provide technical support for guaranteeing cultivated land health and promoting ecological agriculture development.

The invention provides application of bacillus altitudinis H18 and a glucoside hydrolase gene thereof in improving rumen degradation of rice straws, and belongs to the technical field of straw reutilization. The bacillus altitudinis H18 is separated from goat rumen fluid, the bacillus altitudinis H18 can promote degradation of rice straw cellulose, and reference is provided for feed application of rice straw. Sequencing analysis finds that a whole genome of the strain H18 contains a large number of genes related to glucoside hydrolase GH, carbohydrate hydrolase CE and the like, and the content of neutral detergent fibers and lignin in the rice straw can be remarkably reduced by performing fermentation treatment on the rice straw by using the strain H18 through an in-vitro fermentation method. The strain can be used as a bacterial strain for feed application of the rice straws so as to improve the conversion rate and the utilization rate of the rice straws.

This invention relates to the field of casting molding sand preparation technology, and more particularly to a casting molding sand based on the carbonization of waste rice straw and its preparation method. The molding sand is composed of the following raw materials: quartz sand, rice straw carbon powder, molding sand binder, and water; its mass ratio is: quartz sand: rice straw carbon powder: molding sand binder: water = 100: (1~3): (7~9): (3~5). This invention utilizes the multi-level porous structure of the carbon powder obtained from the carbonization of waste rice straw, providing channels for gas discharge during the casting process, preventing gas from being entrained in the molten metal and forming pores, thus reducing the porosity defect rate of the casting. This invention uses carbon powder obtained from the carbonization of waste rice straw to replace coal powder / wood chips, reducing the cost of molding sand raw materials, while simultaneously solving the problem of agricultural waste disposal, achieving "waste treatment with waste."

The utility model discloses a straw impurity removing tool which comprises a main body structure, the main body structure comprises a base and an outer shell, in the straw impurity removing tool, when impurity removing treatment is conducted on straw, the straw is fed into a filtering roller through a feeding pipeline, and then the impurity removing treatment is conducted on the straw. When straw is subjected to impurity removal treatment through meshes of a filter roller, the filter roller rotates and drives a fixed shaft and an elastic plate on the inner side to rotate, the elastic plate is extruded and deformed by a collision block when colliding with the collision block, and the elastic plate recovers to the original shape when leaving the collision block; meanwhile, the straw in the filtering roller is ejected and collided to the inner side surface of the filtering roller, and the straw is crushed through collision between the inner wall of the filtering roller and the straw, so that the purpose of crushing the straw while removing impurities is achieved, the straw processing cost is reduced, and the straw processing efficiency is improved.

The invention discloses a preparation method and application of a magnetic porous biochar adsorbent, and belongs to the field of adsorbents, the preparation method comprises the following steps: taking rice straw as a precursor, taking FeCl3 and ZnCl2 as metal modifiers, and preparing magnetic porous biochar through a one-step magnetization cracking method; when being used as an adsorbent for removing methyl p-hydroxybenzoate in water, the prepared adsorbent is obvious in adsorption effect, low in cost and good in reutilization effect.

The invention discloses biomass graphene quantum dot doped hydrogel and a preparation method and application thereof.Biomass graphene quantum dots are adopted for the hydrogel, during preparation, biomass materials such as rice straw are selected for carbonization, oxidation treatment and hydrothermal reaction are performed to obtain quantum dots, and then the quantum dots and hydrogel components are prepared into the hydrogel according to a specific method. The preparation method has the beneficial effects that the biomass graphene quantum dot doped hydrogel has excellent selective adsorption capacity on specific heavy metal ions (such as Fe3 and Pb2), target heavy metal ions can be efficiently separated and enriched in a complex heavy metal ion mixed system, and the pertinence and efficiency of adsorption are improved; the adsorbent can be regenerated by diluted hydrochloric acid or a nitric acid solution after adsorption saturation, the adsorption performance recovery rate after regeneration reaches 90%-95%, the adsorption performance is still kept above 80% of the initial capacity after five times of recycling, and biomass resource utilization and efficient heavy metal pollution treatment are realized.