31results about How to "Facilitate reuse" patented technology

The invention discloses a carrier channel selection method for MF-TDMA satellite system. there are two conditions for channel selection and allocation in the method by judging if terminal A is first time for starting a time slot resource application. Condition 1: if terminal A is first time for starting time slot resource application and has not prearrange carrier channel, then finding the smallest carrier channel for allocation by finding idle carrier channel and computing present carrier channel load function; condition 2: if terminal A is not first time for starting time slot resource application and a foregoing connection is allocated to predetermined carrier channel, then predetermined carrier channel is target carrier channel for allocation, or all connection of terminal A is tuned to other usable carrier channel for allocation. The inventive method makes user carrier channel tunable, solves time slot resource waste problem arising from uneven load of carrier channel for multi-user multi-connection and promotes time slot resource utilization.

The invention discloses a method for preparing a biomass charcoal material by utilizing waste durian skin and an application of the biomass charcoal material in adsorbing oils and organic substances. The preparation method specifically comprises the following steps of removing hard outer skin of the durian skin, performing thorough washing, performing dicing, and sequentially performing treatment such as hydrothermal treatment, hot-water-bath soaking, freeze-drying, high-temperature pyrolysis in a nitrogen-gas atmosphere and the like, thereby obtaining the durian skin based biomass charcoal material. After the durian skin based biomass charcoal material is soaked into oil or organic solvents to conduct static and sufficient adsorption, a blocky adsorbent is taken out, so that separation can be realized. Besides, regeneration of the adsorbent can be realized through a method of evaporating the solvent.

The invention provides a new microbial strain of vintage yeast CGMCC No.2266 and the application thereof in preparing (S)-(-)-beta-hydroxyphenyl ethyl propionate by microbial transformation. The vintage yeast CGMCC No.2266 is preserved in the China center of General Microbial Culture Collection, and the storage number is CGMCC No.2266, the storage date is 26 November 2007. The invention provides a new bacterial strain for biologically transforming beta-hydroxyphenyl ethyl propionate into (S)-(-)-beta-hydroxyphenyl ethyl propionate. The excess value of the (S)-(-)-beta-hydroxyphenyl ethyl propionate which is produced by the method of the invention on the enantiomer is more than 99.0 percent, the Mol transformation rate of the base material can reach 92.2 percent, the purity of the product can reach 99.8 percent, the Extraction yield of silica gel column chromatography product is 95.6 percent, and the fixed cell particles can be recycled for ten times.

The invention discloses a preparation method of a graphene oxide and cellulose composite aerogel. The preparation method comprises the following steps: (1) dispersing graphene oxide in water to prepare a graphene oxide dispersion, adding a reducing agent and cellulose into the graphene oxide dispersion, performing mixing, and ultrasonically dispersing the obtained mixture to obtain an ultrasonic dispersion; (2) adding a foaming agent solution to the ultrasonic dispersion prepared in step (1), and stirring and foaming the obtained solution to obtain a foamed mixed solution; and (3) carrying outa reduction reaction on the foamed mixed solution prepared in step (2), cooling the obtained reaction product to room temperature, and washing, freeze-thawing and drying the reaction product to prepare the graphene oxide and cellulose composite aerogel. The graphene oxide and fiber composite aerogel prepared by the method has a high adsorption capacity. The invention also discloses the graphene oxide and cellulose composite aerogel prepared by the method, and an application thereof in the treatment of organic dye contaminants in sewage.

The invention discloses a method for casting large-sized steel ingot with an internally arranged cold core and a top arranged electromagnetic field. The method for casting the large-sized steel ingot with the internally arranged cold core and the top arranged electromagnetic field can cast the large-sized steel ingot which is high in yield and few in central defects. The method for casting large-sized steel ingot with the internally arranged cold core and the top arranged electromagnetic field comprises steps of preparing the cold core; preheating the cold core; arranging the cold internally; discharging air; filling the steel ingot; arranging the electromagnetic field at the top and demolding and cooling. According to the method for casting the large-sized steel ingot with the internally arranged cold core and the top arranged electromagnetic field, the steel ingot central defects such as thick crystal structures, center segregation and loosening can be effectively controlled; the top arranged electromagnetic field can heat and stir cap opening steel liquid to effectively reduce the steel ingot cap capacity ratio and the press working head cutting rate, promote steel ingot solidification feeding and dispersed element segregation, reduce steel ingot thermal machining procedures and improve the ultrasonic flaw detection yield of products. The method for casting the large-sized steel ingot with the internally arranged cold core and the top arranged electromagnetic field is applicable to casting of solid steel ingot and solid composite steel ingot in different types and sizes and made of different materials.

The invention relates to a method for preparing a charcoal slow-release fertilizer by utilizing dioscorea zingiberensis saponin fiber waste residues. The method comprises the following steps of: (1) air drying the dioscorea zingiberensis saponin fiber waste residues, smashing and sieving; (2) putting in a reactor, rising temperature to be 300-600 DEG C, and carrying out pyrolytic carbonization under the condition of oxygen limited to obtain charcoal powder after cooling and grinding; and (3) spraying the charcoal powder onto binder solution, packaging a fertilizer for 2-5 times, air drying after mixing uniformly, or pelleting through a comminutor, or compression molding through a mould, so as to obtain the charcoal slow-release fertilizer. According to the method, the process is simple, the cost is low, and the time and the energy are saved; and charcoal and the fertilizer are packaged according to a certain proportion, and a complementary or synergistic effect which exists between the charcoal and the fertilizer is utilized, so that the nutrient efficiency is improved.

The invention discloses a method for preparing a composite plate by recycling bag type dust remover waste filter bags; the waste filter bags are successively subjected to crushing, cleaning, drying, shredding, mixing of glass fibers and the crushed opened material, acupuncture composite, high-temperature pressing, cooling and design finalizing, and finished product composite plate obtaining. Compared with the prior art, produced building templates and wall partition plates have no high requirements on a cleaning process and can be covered with cement and the like on the outside during the using process, so that no requirement exists for building remaining cement or lime compositions; with recycling of the waste filter bag resources, secondary pollution caused by landfilling, incineration and other processing methods is effectively solved, so as to contribute to resource re-utilization, energy saving, emission reduction and other works; in the high-temperature pressurization process, thermoplastic fibers are dissolved to play a bonding effect, so that a glue and other binders are replaced, and produced boards do not contain formaldehyde, the glue and other harmful substances and belong to green environmental-protection building materials.

Provided are a signaling method of a device in a wireless communication system and a device using same. The method comprises: transmitting, to a terminal via an upper layer signal, first information informing about a first resource unit used for interleaving; and performing interleaving for a particular resource for the terminal by the first resource unit, wherein the information informing about the first resource unit is signaled to the terminal separately from second information for informing about a second resource unit used when a base station allocates resources for the terminal.

The invention discloses a powder curing agent for expanded perlite thermal insulation plates, and a preparation method thereof, wherein the powder curing agent comprises the following raw materials byweight: 50-60 parts of power generation chimney ash, 3-8 parts of industrial aluminum sulfate, 5-10 parts of active silica, 25-35 parts of cement clinker powder, 8-12 parts of fluorite powder, and 0.5-1 part of a retarder. According to the present invention, the powder curing agent is prepared from the power generation chimney ash, the industrial aluminum sulfate, the active silica, the cement clinker powder, the fluorite powder and the retarder so as to achieve the reutilization of the industrial and mining waste materials; and the prepared powder curing agent has the rapid setting propertyof gypsum and the high strength of cement, has low-alkalinity so as to significantly reduce the alkali accumulation and peeling phenomena of the thermal insulation plate, further can eliminate radioactive materials, and can flexibly control the molding time during the molding.

The invention discloses a method for conversing microbe to prepare ethyl (S)-3-hydroxy-3-(2-thienyl)-propanoate. The method includes the following steps that: 3-carbonyl-3-(2-thienyl)-propionic acid ethyl ester is regarded as substrate; immobilized cell particles prepared by fermentation liquor which is obtained from fermenting a wine yeast strain CGMCC No. 2266 are used as a biocatalyst; a biological transformation system is formed by a dibutyl phthalate solvent; a conversion reaction is performed for 8-72 hours at a temperature of from 20 DEG C to 40 DEG C; a conversion fluid is isolated and purified to obtain the ethyl (S)-3-hydroxy-3-(2-thienyl)-propanoate. In the invention, with mild reaction condition and friendly environment, the products possess high optical purity and conversion rate of the substrate is high. Processes of isolation and purification are simple. The catalyst is reusable. Therefore, industrial production can be achieved by using the method.

The invention provides a preparation method of (S)-(+)-ethyl mandelate by using biocatalytic ethyl benzoylformate and taking saccharomyces cerevisiae with CGMCC No.2266 as a biocatalyst. The method comprises the following steps of: performing a conversion reaction for 8 to 120 hours at a temperature of between 20 and 35 DEG C in a water and n-hexane two-phase system by using ethyl benzoylformate as a substrate and the saccharomyces cerevisiae with CGMCC No.2266 as a biocatalyst; and separating and purifying the conversion solution to obtain (S)-(+)-ethyl mandelate. The microbial conversion method has the advantages of mild reaction condition, friendly environment, high product optical purity, high substrate conversion rate, simple separation and purification process and recyclable catalyst, and is suitable for industrial production.

The invention relates to a scaling prevention and removal device for mine gas drainage equipment in the technical field of the mine gas drainage equipment. The device includes a processing box. The processing box, an air inlet pipe and an air outlet pipe are provided with flanges; the flanges are equipped with first bolts; mounting holes are installed on the processing box; cover caps are disposedon the processing box; the processing box is provided with inclined plates; a first filter plate, a second filter plate and a waterproof and breathable membrane are disposed between the inclined plates; the processing box is equipped with a cleaning structure; the processing box is provided with hoppers on the first filter plate, the second filter plate and the waterproof and breathable membrane;the hoppers are equipped with material unloading sleeve pipes, the material unloading sleeve pipes are provided with horizontal holes, and the material unloading sleeve pipes are provided with baffleplates; fixation structures are disposed on the baffle plates; the material unloading sleeve pipe on the right end is provided with a flow guiding pipe, and the flow guiding pipe is connected with asedimentation tank; the sedimentation tank is provided with an overflow pipe; the sedimentation tank is provided with a cover plate; a mounting frame and a drug adding pipe are disposed on the cover plate; a drive motor is installed in the mounting frame; the drive motor is provided with a rotation shaft; and the rotation shaft is provided with cross bars, and L-shaped scrapping plates are disposed on the cross bars. A drainage system of the device can operate normally, internal space of the equipment is guaranteed, discharge resistance is reduced, internal friction is reduced, and the efficiency of drainage equipment is improved.

The invention provides a preparation method of a manganese-based catalyst. The preparation method comprises the steps of synthesis of active ingredients, amination modification and doping and catalystforming. The catalyst provided by the invention has the advantages that 1) the performance of catalyzing ozone to oxidize refractory organic matters in coal chemical industry wastewater is obviouslysuperior to that of an aluminum-based catalyst prepared by an existing impregnation method, and the catalyst is stable in property and good in reaction activity; 2) MnO2 with excellent performance isgenerated through oxidation-reduction reaction of a double-reduction system by adopting a hydrothermal synthesis method, the stability of the catalyst is improved through the amination modification, and the modification is carried out in a graphene (GO) doping manner in order to improve the electron transmission efficiency in the reaction process; 3) the doping of low-valent metals magnesium and iron is beneficial to improving the content of oxygen vacancies in the catalyst and contributing to the generation of active oxygen, and 4) the amination modification can obviously improve the stability of the catalyst, contributes to the reuse of the catalyst, and has very important significance for reducing the cost of organic matters in the catalytic ozonation coal chemical industry wastewater.

The invention discloses a method for preparing (S)-3-hydroxyl-3-(2-thienyl)-propionitrile by microbial transformation, which comprises the following steps of: forming a biological transformation system with 3-hydroxyl-3-(2-thienyl)-propionitrile as a substrate, with an immobilized cell granule prepared from an enzyme-containing bacteroid cell obtained by fermenting a saccharomyces cerevisiae strain with the preservation number of CGMCC (China General Microbiological Culture Collection) No.2266 as a biocatalyst, and with phthalandione as a solvent; carrying out conversion reaction at 20-40 DEG C for 8-72h; and separating and purifying a transformation liquid to obtain a product, i.e., the (S)-3-hydroxyl-3-(2-thienyl)-propionitrile. The (S)-3-hydroxyl-3-(2-thienyl)-propionitrile is prepared by adopting a microbial transformation method which has the advantages of mild reaction condition and environmental friendliness; microorganisms are easy to culture on a large scale and low in cost; the produced strains are safe and toxicity-free; the product is easy to extract; the transform amount of the substrate and the production efficiency are higher; and the method is easy to realize the large-scale industrial production.

The invention discloses a floor-type agricultural and forestry insecticide that is convenient to fix, comprising a base, a fixing device, a support rod and a placement frame; through holes are opened at the four corners of the base; the fixing device includes a pressing rod and a fixing bolt, One end of the pressure rod is hinged to the base, and a chute is provided on the pressure rod, and the fixed bolt runs through the through hole and can move up and down. The upper end of the fixed bolt is movably connected with a slider matching the chute, and the slider is slidably matched with the chute; The bottom of the support rod is connected to the center of the base, the lower end of the support rod is provided with an insect trap light, and the periphery of the insect trap lamp is provided with a power grid, and the power grid is fixed on the base; the placement frame is installed on the top of the support rod, placed A plurality of flying insect traps are arranged in the frame. The present invention can fix the whole device conveniently, and simultaneously, it can kill crawling pests and flying pests.

The invention discloses an invisible semiconductor device and a preparation method and application thereof. The preparation method comprises the steps of sequentially forming a sacrificial layer, an epitaxial layer and a nano-pillar array on an epitaxial substrate, wherein the epitaxial layer and the nano-pillar array both contain III-V group semiconductor materials; arranging an insulating material layer which at least covers the nano-pillar array, and processing at least one window on the insulating material layer so as to enable at least part of the nano-pillar array to be exposed from the window; and arranging a first electrode at the window of the insulating material layer, and enabling the first electrode to be electrically connected with the nano-pillar array exposed out of the window, wherein the first electrode is a transparent electrode, a second electrode is arranged on the area, which is except the window, of the insulating material layer, and then the invisible semiconductor device is formed. The invisible semiconductor device provided by the invention is long in service life, and the invisible semiconductor device is provided with the vertical nanorod array, thereby facilitating the release of epitaxial stress and improving the crystal quality.

The invention relates to a method for integrating Web pages as service for registration and monitoring. The method is characterized by comprising the following steps: S1 registering the Web pages which need to be integrated as the service in a service registry; S2 generating a proxy address of the page integration service, and dynamically writing into a configuration file of agent software, so as to realize the support to page forwarding; S3 performing timing analysis on access logs of the agent software in the background, so as to obtain access records of the Web page integrated service; S4 displaying access conditions of the page integrated service through a service monitoring center. The method has the beneficial effect that united registration, management and monitoring are performed on Web page integration in a service form, and the method is favorable for reuse and united supervision of the Web page integration and even for promoting an enterprise to realize service-oriented IT architecture.

The invention discloses a method for improving the extraction rate of volatile oil of rhizoma acori graminei by re-extraction. The method comprises inspecting the time until the constant initial extraction volume of volatile oil of rhizoma acori graminei by a steam distillation method, determining conditions of the re-extraction through determining the re-extraction interval time and the volume constant time, and verifying the extraction rates and extract ingredients of the initial extraction and re-extraction to determine the optimal re-extraction process conditions. Through the steam distillation re-extraction method, the extraction rate of volatile oil of rhizoma acori graminei is improved, the use rate of the rhizoma acori graminei is increased, recycling of traditional Chinese medicines, high efficiency and energy saving are promoted, and the use range of the volatile oil of traditional Chinese medicines in traditional Chinese medicine preparations, foods and cosmetics is widened.The extract volatile oil of rhizoma acori graminei has small damage to the components, has a high purification rate and has a good practical value.

The invention discloses an application of a novel microbial strain Saccharomyces cerevisiae CGMCC No.2230 in microbial transformation preparation of (S)-(-)-3-chlorine-1-phenylpropanols. The application of the invention is that: 3-chlorine-1-propiophenones are taken as substrates, and immobilized cell particles which are prepared by fermentation broth obtained after fermentation of the Saccharomyces cerevisiae strain CGMCC No.2230 are taken as biocatalysts; transformation reaction time of transformation liquid is 8 to 72 hours at the temperature of 25 to 30 DEG C in dibutyl phthalates, and the product S)-(-)-3-chlorine-1-phenylpropanols are obtained after separation and purification of the transformation liquid. The microbial transformation method has the advantages of friendly surroundings, mild reaction conditions, simple product separation, high substrate transformation ratio, good product purity and biocatalysts capable of being reused, and is suitable for commercial process.

The invention discloses a mold for making an alkali metal wax package, and a method for preparing and using the mold. The mold includes a silicon base; the silicon base includes: a semi-structural spacer located at the edge of the silicon base; and a central part of the silicon base; The upper surface of the central part of the silicon substrate is indented to form a number of wax-package bearing cavities; a load-carrying cavity isolator is formed between adjacent wax-package bearing cavities; a release sacrificial layer is formed on the upper surface of the silicon substrate, and the upper surface of the release sacrificial layer is far away from the silicon substrate A paraffin layer is formed; a cavity for carrying alkali metal is formed on the side of the paraffin layer away from the release sacrificial layer; the semi-structural isolation body includes corrosion release holes. The invention can reliably and controllably realize the mass production of uniform and consistent alkali metal wax package arrays, is fully compatible with MEMS and microelectronic technology, has simple and easy process flow, and strong operability; and the wax package mold can be reused, which is beneficial to avoid The waste of raw materials can effectively reduce the cost of mass production.

The invention discloses a method for casting a large-scale steel ingot with a built-in cold core and an overhead electromagnetic field, which can cast a large-scale steel ingot with high yield and few central defects. The steps of the invention include: cold core preparation; cold core preheating; built-in cold core; air exhaust; steel ingot filling; top electromagnetic field; demoulding and cooling. The built-in cold core of the invention can effectively control the center defects of steel ingots, such as coarse crystal structure, center segregation, looseness, etc.; the top electromagnetic field can heat and stir the cap mouth liquid steel, which can effectively reduce the cap volume ratio of steel ingots and the cutting rate of pressure processing , promote solidification feeding and disperse element segregation of steel ingots, reduce thermal processing of steel ingots and improve the qualified rate of ultrasonic flaw detection of products. The invention is applicable to the casting of solid steel ingots and solid composite steel ingots of various specifications, materials and shapes.

The invention relates to a method for preparing a compound board substrate by using waste yam diosgenin fibers. The method comprises the following steps: 1) drying the waste yam diosgenin fibers in air, grinding the dry waste yam diosgenin fibers and screening the ground waste yam diosgenin fibers to obtain the waste yam diosgenin fibers with grain sizes between 40 meshes and 100 meshes; 2) taking 50-100 parts of the waste yam diosgenin fibers from step 1), 5-20 parts of adhesive, 5-10 parts of curing agent and 3-6 parts of modifier in parts by weight, mixing evenly, putting the obtained mixture into a mould and compacting; and, 3) at a temperature between 50 DEG C and 200 DEG C and under a pressure between1.5MPa and 2.5MPa, thermally pressing for 10-60 min, cooling, demoulding and curing to obtain the compound board substrate. The compound board substrate prepared by the method provided by the invention is beneficial to the reutilization of resources, and has remarkable economic benefit and environmental benefit.

The invention relates to the field of artificial intelligence, and discloses a fluorine-containing wastewater treatment method, device and equipment and a storage medium. An efficient method for treating the fluorine-containing wastewater is realized. The method comprises the steps of according to a preset agent feeding amount, carrying out fluorine removal and precipitation treatment on the fluorine-containing wastewater through the wastewater treatment device, and discharging the fluorine-containing wastewater containing sludge after fluorine removal and precipitation into a reflux device; monitoring the fluorine-containing concentration of the fluorine-containing wastewater in the reflux device, and judging whether the fluorine-containing wastewater in the reflux device meets a preset discharge condition or not; if not, setting the sludge reflux quantity corresponding to the fluorine-containing wastewater in the reflux device and the new agent feeding amount through the intelligent control device; and returning the sludge corresponding to the sludge reflux quantity in the reflux device and the fluorine-containing wastewater to the wastewater treatment device, and carrying out the next round of defluorination precipitation treatment on the returned fluorine-containing wastewater through the wastewater treatment device according to the new agent feeding amount.

The invention discloses a carrier channel selection method for MF-TDMA satellite system. there are two conditions for channel selection and allocation in the method by judging if terminal A is first time for starting a time slot resource application. Condition 1: if terminal A is first time for starting time slot resource application and has not prearrange carrier channel, then finding the smallest carrier channel for allocation by finding idle carrier channel and computing present carrier channel load function; condition 2: if terminal A is not first time for starting time slot resource application and a foregoing connection is allocated to predetermined carrier channel, then predetermined carrier channel is target carrier channel for allocation, or all connection of terminal A is tuned to other usable carrier channel for allocation. The inventive method makes user carrier channel tunable, solves time slot resource waste problem arising from uneven load of carrier channel for multi-user multi-connection and promotes time slot resource utilization.

The present invention relates to a heat-shrinkable polyester-based film and to a heat-shrinkable polyester-based label. The heat-shrinkable polyester-based film of the present invention has superior shrinkability and color, and thus provides aesthetic enhancement to the product to which the film is attached when the film is printed. Therefore, the polyester-based film of the present invention can be valuably used as a label film as it can replace labels made of paper, and can be easily peeled off by means of hot water, and thus may contribute to the recycling of bottles. The heat-shrinkable polyester-based label includes a heat-shrinkable polyester-based film layer, and minimizes the rolling phenomenon thereof. Thus, a label sheet delivery process and an adhesive application process can be performed in a single process line, and therefore an existing paper label production line can be used as is. The bottle, to which the heat-shrinkable polyester-based label is attached, is provided with aesthetic enhancement and superior adhesive stain removability. In addition, the label of the present invention can be removed by means of hot water alone for recycling to thereby prevent the generation of wastewater, and is thus eco-friendly.

The invention belongs to the technical field of steel and iron metallurgy and particularly relates to a fluoride-free slag-making fluxing agent for converter steel making. The invention aims at providing the fluoride-free slag-making fluxing agent for the converter steel making, and the fluoride-free slag-making fluxing agent solves key problems that at present, fluorite, laterite, ferric oxide and the like are adopted as fluxing agents for steel making and slag mixing, the fluoride pollution is caused, the slagging efficiency is low, the early-stage fast slag making dephosphorization cannot be favorably realized, and the like. Meanwhile, the sufficient utilization of low-grade spodumene resources is realized. The fluoride-free slag-making fluxing agent is characterized by consisting of the following ingredients (in percentage by mass): 41 to 50 percent of triphane, 31 to 40 percent of active lime and 11 to 20 percen tof ferric oxide.

The invention discloses a novel microbial strain Saccharomyces cerevisiae CGMCC No.2230 and application of the Saccharomyces cerevisiae CGMCC No.2230 in biotransformation preparation of beta-hydroxybenzoic ethyl propionate, wherein, the Saccharomyces cerevisiae CGMCC No.2230 is collected in China General Microbiological Culture Collection Center of China Committee for Culture Collection of Microorganisms with a collection number of CGMCC No.2230. The application of the invention is that: beta-carbonyl benzoic ethyl propionates are taken as substrates, and immobilized cell particles which are prepared by fermentation broth obtained after fermentation of the Saccharomyces cerevisiae strain CGMCC No.2230 are taken as biocatalysts; transformation reaction time of transformation liquid is 8 to72 hours at the temperature of 25 to 30 DEG C in a water / dibutyl phthalate two-phase system, and the product beta-hydroxybenzoic ethyl propionates are obtained after separation and purification of the transformation liquid. The microbial transformation method has the advantages of friendly surroundings, mild reaction conditions, simple product separation, high substrate transformation ratio, good product purity and biocatalysts capable of being reused, and is suitable for commercial process.

A membrane technology integrated treatment method for high-concentration acrylonitrile wastewater. Firstly, the acrylonitrile wastewater is cooled by heat exchange through a heat exchanger, and then enters a raw water tank for standby; then the wastewater in the raw water tank is pretreated by a high-efficiency filter, and The pretreated wastewater passes through the microfiltration membrane or ultrafiltration membrane to remove suspended particles, flocs and acrylonitrile oligomers in the wastewater; the acrylonitrile wastewater filtrate enters the nanofiltration system through a booster pump for nanofiltration operation; the obtained The filtrate is installed in a reverse osmosis system for reverse osmosis operation. The present invention can effectively improve the treatment efficiency while reducing the cost of acrylonitrile treatment, and is free from waste water COD Cr High and low restrictions, low energy consumption, easy operation, and small floor space. Compared with the existing technology, it is a low energy consumption, pollution-free, and easy-to-operate acrylonitrile wastewater treatment technology.