51results about How to "Avoid secondary environmental pollution" patented technology

The invention discloses a contaminated soil repair method and a repair device. The repair method comprises the steps of (S1) vacuum thermal separation: performing thermal separation on soil in a vacuum environment so as to separate hazardous substances, and purifying the hazardous substances; (S2) chemical washing: chemically washing the soil on which the vacuum thermal separation is performed; (S3) reduction treatment: adding a reducing agent to the soil on which the chemical washing is performed; (S4) repair: applying a soil repair agent to the soil on which the reduction treatment is performed; (S5) stabilizing treatment: applying a heavy metal cadmium stabilizer and a microbial agent to the repaired soil; and (S6) improvement and maintenance: improving and maintaining the stabilized soil. According to the contaminated soil repair method, the contaminated soil can be thoroughly repaired once with low cost and high efficiency.

The invention relates to a method for preparing a magnetic carbon nano-tube adsorbent having high adsorption capacity and used for removing a dye from an aqueous phase. The method comprises the following steps of: mixing an original sample of unpurified carbon nano-tubes and potassium hydroxide powder, and grinding uniformly; putting into a reaction container, introducing insert gas, reacting, raising to certain temperature, and regulating carrier gas; and continuously reacting for several hours, filtering a reaction product, washing, and performing vacuum drying to obtain the magnetic carbon nano-tube composite adsorbent. A solid-phase oxidant is used for modifying a surface structure of the carbon nano-tubes, so that the specific surface area and hydrophilic nature of the carbon nano-tubes are remarkably improved, and the hydrophobic property of the carbon nano-tubes and the dispersion performance of the carbon nano-tubes in an aqueous solution are improved; and the adsorbent can be conveniently and quickly separated and recovered by a magnetic separation technology, so that secondary environmental pollution is avoided. In addition, raw materials are readily available, the preparation process is simple and low in cost, and is suitable for continuous large-scale batch production, and conditions are easy to control.

The invention discloses a preparation method of an electromagnetic wave absorption material based on ferrite solid wastes. The electromagnetic wave absorption material with a composite structure is obtained by taking the ferrite solid wastes produced by grinding in a soft magnet magnetic core production link as a magnetic base body and covering carbon on a crystal boundary. A ferrite / carbon composite electromagnetic wave absorption material prepared by the preparation method has anti-oxidization and anti-corrosion capabilities; an interface carbon material is added so that the density of a wave absorption body can be reduced and light and thin wave absorption products are easy to produce; the mechanical properties also can be stabilized and reinforced. The electromagnetic wave absorption material prepared by the preparation method disclosed by the invention has wide applicability, is suitable for being used for absorbing electromagnetic waves with the frequency band of DC-42.5GHz and can be used for products including blocks, patches, pyramids, conoids, coatings, thin films and the like.

The invention provides a preparation method of composite envelope water retaining and slowly-releasing urea. The water retaining and slowly-releasing urea of a dual-layer film structure is formed with large granular urea as a kernel, a chitosan-polyving akohol composite film as an inner coating layer and a water-retaining agent as an outer coating layer, and the water retaining and slowly-releasing urea has excellent water retaining and nutrient slowly releasing properties. The method is characterized by comprising the steps that the large granular urea with the diameter of 2-5 mm is put into a coating device, the urea rolls in the coating device and is heated to be 80-100 DEG C, chitosan-polyving akohol coating fluid is sprayed to the surface of the urea, the water-retaining agent of the grain size of 0.075 mm is added, epoxy chloropropane with the concentration of 0.5% is sprayed by a spraying gun with the intensity of pressure larger than or equal to 0.4 MPa for the surface cross-linking reaction, and finished fertilizers are obtained after drying is performed. The water retaining and slowly-releasing urea is simple in production process, low in investment cost, and easy in industrial production. No organic solvent is used in the production process, and secondary pollution caused by using organic solvents is avoided accordingly.

The invention belongs to the technical field of new environment nanometer functional materials and particularly relates to a method for efficiently removing high-concentration dye wastewater by combination of adsorption and photocatalysis. The method is implemented by the following steps that: a crosslinked chitosan / titanium dioxide nanometer hybridization material is prepared and then is added into the high-concentration dye wastewater, the reaction is continued for several hours under the illumination of an ultraviolet lamp, and then the dye wastewater is completely purified. The crosslinked chitosan / titanium dioxide nanometer hybridization material adopted in the method fully utilizes the excellent adsorbability of crosslinked chitosan and the excellent photocatalysis of titanium dioxide so as to perform hybridization and composition on the functional material with double performances of adsorption and photocatalysis and to realize purification and removal of the high-concentration dye wastewater; and in the process of continuous illumination, dye adsorbed on the surface of the hybridization material is slowly mineralized under the photocatalysis of the titanium dioxide, thereby realizing regeneration of the nanometer hybridization material. According to the invention, the raw materials are simple and easy to obtain, the preparation technology is simple, the conditions are easy to control, the cost is low, and thus the method is applicable to the continuous large-scale and volume production of the nanometer hybridization material.

The invention relates to a method for vulcanized rubber regeneration by desulfurization and depolymerization, and belongs to the rubber cyclic regeneration field. The method comprises the following steps: firstly obtaining supercritical carbon dioxide by adding dry ice in a high pressure reaction kettle in safe and rapid manner, realizing rapid pollution-free permeation of desulfurization reagent into the rubber by the supercritical CO2, then breaking cross bonds of the rubber by cooperation of mechanical shearing, temperature and the desulfurization agent so as to realize desulfurization and regeneration of the rubber. The regenerated rubber has the advantages of safety, rapid performance, low energy consumption, no pollution, and good recycling effect.

The forming process of aluminum alloy die-casting motor flange is characterized in that the specific process is: (1) smelting aluminum material, setting the temperature at 700-750 ° C, and purifying the molten aluminum; (2) spraying strong force on the surface of the mold cavity Release agent; (3) Pour the purified aluminum liquid into the mold cavity; (4) Adjust the various mechanisms and pressure gauges of the die-casting machine; (5) Die-casting; (6) A small amount of machining; (7) Inspection, Packaging and storage. Compared with the original centrifugal casting process, this technical solution can be directly formed, which reduces the subsequent processing allowance, reduces the cost, and ensures the quality stability of the product, avoids secondary environmental pollution, eliminates potential safety hazards, and improves The production efficiency is improved, the equipment is simple, and the labor intensity of the operators is reduced.

The invention relates to an industrial wastewater and municipal wastewater processing method. The sewage treating apparatus comprises: TR1, TR2, TR3 and TR4 on-line water processor units which grind pulp in the pulping process and in the primary and second pulp washing process; a flocculating filtration apparatus, a mechanical filtration apparatus, a secondary filtration apparatus and a hyperfiltration apparatus which process the water in the bleaching and rinsing process; and a desalinisation processing apparatus TR5 which ensures the final desalinisation of the circulating water. The processing method changes the fluid form in the whole process after adding the flocculant in the wastewater. In the biochemical polymerization reaction and mechanical physical movement process, the polluting factors rapidly generate the flocculation dissociation in the flow process, thus making the tiny microparticle impurities generate the agglomerate which is convenient for filtration, hydrophilic and insoluble and dewatering the pollutant to be sorted into dry matters. The invention has the advantages of low equipment investment, no waste liquid discharge and remarkable economic benefit. The processed water is used in cycle. The invention is applied to paper-making pulping, municipal wastewater and industrial wastewater process.

Disclosed is a laminated floor using a poly lactic acid (PLA) resin, of which a surface layer is formed of the PLA resin, thereby being environment-friendly and providing soft feeling and excellent workability. The laminated floor using a PLA resin, which is constructed on floor, includes a bottom layer formed of a HDF or MDF; and a surface layer comprising a reinforcement layer, a printed layer, a transparent layer and a surface treatment layer which are stacked on the bottom layer, wherein one or more of the reinforcement layer, the printed layer, the transparent layer and the surface treatment layer are formed of the PLA resin.

The invention relates to a multifunctional embedded kitchen garbage compressor. Functions such as garbage compressing, garbage storage, garbage transferring and garbage sterilizing are completed under the control of an IO circuit. A motor, a screw transmission device, a drive device, a microcomputer control circuit mainboard and an IO circuit board are disposed on the upper portion of the compressor. A guide device, an automatic locking device, a tissue box device, a garbage throwing gate device and a manual operating and control device are located on the middle portion of the compressor. A compressing device, a garbage isolating and storage device and the like are located on the lower portion of the compressor. The IO circuit board is connected with the garbage throwing gate device, the compressing device, the manual operating and control device, the automatic locking device and the garbage storage device. The garbage throwing gate device and the locking device of a garbage drawer is connected with the IO circuit. When garbage overflows, a sensor connected with the IO circuit starts and transmits a signal, the IO circuit drives the locking control device to lock the garbage throwing gate device and the garbage drawer through microcomputer circuit processing, and a central control module drive the compressing device to compress the size of garbage.

The invention discloses a high-molecular coagulation cohesive dust suppression agent and a preparation method thereof. The dust suppression agent is prepared from the following components: 0.5-1.0% ofhydroxyethyl cellulose, 1-2% of polyacrylamide, 2-4% of itaconic acid, 0.01-0.03% of an initiator, 0.01-0.02% of a cross-linking agent, 0.01-0.02% of an anti-freezing agent, 0.01-0.02% of a surfactant and the balance water. The dust suppression agent and the preparation method thereof have the advantages that the hydroxyethyl cellulose serves as a matrix and is subjected to graft copolymerizationreaction with the polyacrylamide, so that the frictional resistance of a solution is reduced, the liquidity of the solution is improved, then a proper amount of itaconic acid is grafted to enable thesolution to become colloid with relatively good liquidity and diffusivity, the anti-freezing performance of the dust suppression agent is improved by adding a small amount of anti-freezing agent, dust can be covered, a dense coating is formed on the surface of the dust, after the dense coating becomes dry and hard, the dense coating and dust together form a hard shell, the dust suppression agenthas the advantages of being non-toxic, environmentally friendly, low in price and biodegradable, and secondary environmental pollution is avoided.

The invention belongs to the technical field of sludge treatment, and specifically relates to a method for rapidly improving the settling and dewatering performances of sludge. The method comprises the following steps: adjusting the sludge water content and pH; mixing sludge and cationic polyacrylamide (PAM), continuously adding nanometer ferroferric oxide (Fe3O4), performing suction filtration dewatering on conditioned sludge, and performing rapid settling under magnetic action. The method cooperatively treats the sludge through charge neutralization and net capturing of polyacrylamide in combination with the adsorption effect of the nanometer ferroferric oxide, can obviously improve the settling and dewatering performances of the sludge, and realizes sludge rapid settling, and the promotion of the method has important environmental ecological significance on sludge treatment and disposal in China.

The present invention is synergistic furaldehyde-degrading ultrasonic wave and nanometer TiO2 method. The method features that nanometer TiO2 is first dispersed inside furaldehyde solution or loaded on carrier and suspended inside furaldehyde solution, and H2O2 solution is added; and the furaldehyde solution is then ultrasonic treated for being degraded into harmless CO2 and water. The method of the present invention can decarbonylate furaldehyde in 60 min and degrade furaldehyde into harmless CO2 and water in 3 hr, and has excellent application foreground in degrading waste water containing toxic furaldehyde and other harmful compound.

The invention mainly discloses hollow glass, comprising two pieces of glass, a hollow layer formed between the two pieces of glass, a separation frame containing a drying agent, an inner-layer sealant, a metal section and an outer-layer seal structural adhesive, wherein the separation frame surrounds the hollow layer, the two sides of the separation frame are adhered to the two pieces of glass by using the inner-layer sealant to form the closed hollow layer, the outer side of the separation frame and the two pieces of glass form a groove, the metal section is arranged in the groove, and the outer-layer seal structural adhesive is filled between the metal section and the groove. Under the condition of meeting various performance indexes of original hollow glass, after being applied to a curtain wall in a later stage, the hollow glass has the advantages of saving auxiliary frames and other materials of curtain wall glass and avoiding secondary pollution caused by adhesion of the auxiliary frames.

The invention relates to multifunctional separation equipment for high-temperature biological mixed gas. A heat exchange chamber and a static separating chamber are arranged in a shell; both ends of heat exchange pipes in the heat exchange chamber are respectively communicated with a biological gas outlet at the top part of the heat exchange chamber and a biological mixed liquor outlet at the bottom part of the heat exchange chamber; a high-temperature biological mixed gas inlet arranged in the side wall of the shell is communicated with the bottom ends of the heat exchange pipes; the static separating chamber is divided into a left chamber and a right chamber by a partition plate in the static separating chamber; the lower parts of the two chambers are communicated; a biological mixed liquor inlet is located above one of the two chambers; a biological light tar outlet is arranged above the side wall of the chamber provided with a biological mixed liquor inlet; a biological acetic acid outlet is arranged above the side wall of the other chamber; and the bottom part of the static separating chamber is provided with a biological heavy tar outlet. As corollary equipment of a pyrolysis comprehensive conversion and utilization system for biomass waste resources, because solid purification and separation equipment, liquid purification and separation equipment and gas purification and separation equipment are integrated, the multifunctional separation equipment for the high-temperature biological mixed gas has a compact structure and less occupied space. Secondary pollution and wastes of secondary transformation resources in the transformation process are eliminated.

The invention discloses a SO3 online measurement system and method in flue gas. A sampling port of a heat-tracing sampling device is inserted into a flue, an outlet of the heat-tracing sampling devicecommunicates with an inlet of an electrochemical measurement system, a flue gas outlet of the electrochemical measurement system communicates with the inlet of a flue gas dump pump through the flue gas flow measurement device; the outlet of the flue gas dump pump communicates with the flue gas inlet on a flue wall surface; an absorption liquid outlet of the electrochemical measurement system communicates with the inlet of the absorption liquid conveying pump through an absorption liquid flow measurement device, and the outlet of the absorption liquid conveying pump is divided into two paths;one path communicates with the absorption liquid recycling device, and the other path communicates with the inlet of the absorption liquid atomizing device; a control end of the heat-tracing samplingdevice, a control end of a filter back-flushing device, an output end of the absorption liquid flow measurement device and the output end of the flue gas flow measurement device are connected with a controller. The system and method disclosed by the invention can accurately measure the SO3 concentration in the flue gas in real time.

The invention relates to a porous ceramic sound absorption material designed on basis of photonic crystal theory and a production method thereof. The porous ceramic sound absorption material is prepared from a ceramic framework, wherein micropores which are periodically arranged are formed in the ceramic framework; the porous ceramic sound absorption material is characterized in that the porosityis 40-70%, the pore diameter is 0.0001-0.001m, the flow resistance rate is 2500-12500Pa.s / m<2>, and the thickness is 20-100mm. The porous ceramic sound absorption material designed on basis of the photonic crystal theory can replace the traditional sound absorption material in multiple places, is capable of avoiding the secondary environment pollution of the inorganic fiber materials such as glasswool caused by dust formation, and can be applied to the outdoor environment; compared with other sound absorption materials, the porous ceramic sound absorption material has incomparable superiority.

The invention relates to the technical field of microbial remediation devices, and discloses a recycling, repairing and stirring device for biogas fermentation. The recycling, repairing and stirring device comprises a shell, a button is fixedly connected to the outer part of the shell, a through hole is formed in the surface of the shell, a gear I is fixedly connected to the outer part of the shell, and a connecting rod I is movably connected to the inner part of the shell; a gear II is movably connected outside the connecting rod I; under the interaction of the through hole, the gear I, the connecting rod I, the gear II, a connecting rod II, a connecting rod III, a sliding rail, a sliding block, a contact rod, a mounting plate, a fixed shell, a magnetic ring, an electromagnet, a movable plate, a support plate, a stirring head, a detection assembly I, a detection assembly II and a delay assembly, the biogas fermentation yield can be greatly improved, and the economic income of users is increased; meanwhile, the yield of organic substances repaired by microorganisms is increased, and the phenomenon that the organic substances generated in life pollute the environment is avoided, so that the organic substances are reasonably and scientifically utilized.

The invention discloses an aqueous mirror back aluminum plated protective coating which comprises the following raw materials in percentage by weight: 19-25% of a 65% solid content aqueous pure acrylic resin, 10-16% of a 65% solid content aqueous epoxy modified acrylic resin, 4-6% of a 100% solid content complete methoxylation amino resin, 33-50 parts of inorganic pigment packing slurry, 4-6 partsof a cosolvent, 4-6 parts of a composite colloid aid and 8-12 parts of distilled water. By using main body resin, a technical measure of aqueous preparation, and water as a construction medium, the prepared coating has property effects equivalent to those of an oily product on the premise that environment pollution problems caused by excessive VOC (Volatile Organic Compound) emission are solved.

The invention relates to a wastewater treating device of a kitchen wastewater recycling flow, comprising a liquid fertilizer producing part (1), a fermented manure producing part (2) and a purifying part (3), wherein the liquid fertilizer producing part (1) performs the following steps of: heating and stirring wastewater produced in a kitchen waste recycling treatment process so that the wastewater rotates at a rotating speed of 4000-6000 rpm, separating out oil component, wastewater and sludge, fermenting the separated wastewater at the rotating speed of 4000-6000 rpm by means of microorganisms, and then separating the generated microorganisms and treated water through sedimentation; the fermented manure producing part (2) is used for mixing the liquid fertilizer conveyed from the liquid fertilizer producing part (1) with coco coir and then performing aeration, stirring and fermentation; and the purifying part (3) is used for treating the supernatant water separated through sedimentation conveyed from the process of the liquid fertilizer producing part by using an iron salt, sodium hydroxide and a coagulant so that the floating dregs are condensed, and then performing aeration to clear away the floating dregs on the water surface.

The invention provides a comprehensive protection system for a corrosive gas cylinder. The comprehensive protection system comprises a cabinet body, a sealing door, a waste discharge filtering device;the sealing door is covered in the cabinet body in a sealing manner, and the waste discharge filtering device is in communication with a waste gas discharge port of the cabinet body; a working area and a storage area are arranged in the cabinet body, and each of the working area and the storage area is provided with at least one group of fixing positions capable of accommodating steel cylinders;a steel cylinder valve is mounted at a top port of each steel cylinder, a gas outlet of each steel cylinder valve is connected with a pressure reducing valve, and an outlet of the pressure reducing valve is guided to a gas outlet of the cabinet body through a gas pipe; the cabinet body is also connected with a gas leakage alarm instrument which can be used for detecting gas leakage in the cabinetbody; and the waste discharge filtering device comprises a first electromagnetic valve capable of controlling opening and closing of a gas inlet in the cabinet body, a second electromagnetic valve capable of controlling opening and closing of a waste gas discharge port in the cabinet body and a filtering body capable of adsorbing leaked gas in the filtering cabinet body. According to the comprehensive protection system, the corrosive gas cylinder can be safely stored, and the sealing and protecting effects are better.

The invention discloses a raw material treatment system for a rotary hearth furnace, and a process thereof, and belongs to the technical field of rotary hearth furnaces in the metallurgical industry.The raw material treatment system for the rotary hearth furnace comprises an ash receiving device, a sludge receiving device, a mixing device and a balling device, wherein the working procedures of the ash receiving device and the sludge receiving device are paratactic, and the mixing device and the balling device are arranged according to the working procedures in sequence subsequently; the ash receiving device and the sludge receiving device receive corresponding materials separately, and then the materials are fed into the mixing device for mixing; and the mixed materials are conveyed intothe balling device for balling processing. The materials are fed into the mixing device through the ash receiving device and the sludge receiving device in parallel, so that a sludge drying system inthe prior art can be cancelled, thereby cancelling the technological process of adding water after sludge drying; sludge is directly added to the mixing device, and mixed with ash uniformly; and the production stability of a raw material system is improved, and secondary environmental pollution in the sludge drying process is avoided.

The invention mainly discloses a curtain wall connecting node which comprises fixed parts, an inserted part and a fastening part, a groove is formed in a beam and used for hooking the fixed parts, the fixed parts hook the side portions of the groove, the inserted part is inserted into the middle of the groove, moreover the exterior of the inserted part buckles the fixed parts, and the fastening part penetrates through the inserted part to be integrated with the beam. The fixed parts and other fittings such as a hook and a supporting plate are combined into a whole, and stress intensity of the node is improved.

The invention provides a system and a method for realizing aluminum ash resource utilization by utilizing a plasma technology. The system comprises a pretreatment unit, a preheating feeding system, aplasma rotary kiln, a waste heat utilization unit, a tail gas purification unit, a carrier gas supply control system, an oxygen generation unit, a plasma torch and a purification unit. The method comprises the following steps that: aluminum ash is pretreated and preheated and then enters a plasma rotary kiln to be subjected to oxygen-enriched roasting, metal aluminum, aluminum nitride and aluminumcarbide in the aluminum ash are converted into aluminum oxide, fluoride salt and chlorate to volatilize; a calcined oxide is cooled, so that a low-purity aluminum oxide raw material can be obtained;the low-purity aluminum oxide raw material is purified through the purification unit, so that an aluminum oxide product can be obtained; tail gas of the plasma rotary kiln is subjected to heat exchange through the waste heat utilization unit and used for preheating the aluminum ash, and and therefore, energy consumption is reduced; the tail gas subjected to heat exchange is purified and then mixedwith oxygen to be recycled as carrier gas. According to the system and method, aluminum ash resource utilization is achieved, secondary environmental pollution caused by flue gas emission is avoided,and the economical efficiency and the environmental protection property are better.

The invention relates to a kitchen waste compressor adopting the structure that a motor, a lead screw transmission device, a driving device, a microcomputer control circuit main board and an IO circuit board are arranged at the upper part of the kitchen waste compressor; a guiding device, an automatic closing and locking device, a paper towel box device (3), a garbage throw-in door (2) device and a manual control device are arranged in the middle of the kitchen waste compressor; a compression device, a garbage separating storage device and the like are arranged at the lower part of the kitchen waste compressor; the IO circuit board is connected with the garbage throw-in door device, the compression device, the manual control device, the automatic locking device and the garbage separating storage device; and the garbage throw-in door device and the automatic closing and locking device of a garbage drawer box are connected with the IO circuit board. When the kitchen waste compressor is fully filled with garbage, a sensor connected with the IO circuit board starts and sends out a signal; the IO circuit board drives the automatic closing and locking device to lock the garbage throw-in door device and the garbage drawer box through the processing of a microcomputer circuit; and a central control module drives the compression device to compress the size of garbage.

Proposed are a low-temperature de-NOx catalyst for treating exhaust gas from a stationary source and a method of manufacturing the same. The low-temperature de-NOx catalyst can promote the reduction reaction of nitrogen oxide even at a low temperature despite supporting vanadium in a small amount, can increase resistance to sulfur poisoning, and can be easily manufactured in a manner that does not deteriorate nitrogen oxide removal efficiency even after long-term operation because it prevents secondary environmental pollution due to the treated gas and has superior abrasion resistance, thereby contributing to commercialization.

The invention discloses a method for treating low-concentration cobaltic wastewater through dispersion and oxidation of ozone. The method can be used for the water treatment on multiple kinds of cobaltic wastewater and cobaltic domestic wastewater and the reclaiming of cobalt resource in the wastewater. The method comprises a main technical proposal that: the ozone in micron-level bubbles is dispersed in a cobaltic wastewater system; oxidation temperature is controlled between 20 and 90 DEG C; time for oxidation reaction is controlled between 0.5 and 2 hours; and after oxidation reaction is finished, the solution is kept stand and is clarified. The method has loose requirement on acidity of the wastewater system, and can be suitable for neutral or alkali condition or even high-acidity condition. The method for treating the cobaltic wastewater can solve the problem of secondary pollution of a chemical drug and has good treatment effect; the purified water quality can reach the emission standard regulated by the state; simultaneously, reclaimed cobalt compounds can be directly roasted to prepare cobalt oxide powder, and can also be used as a raw material for producing a high-quality cobalt compound product.

The invention belongs to the field of water treatment, in particular to sewage treatment equipment in the pulping process. The sewage treatment equipment of the present invention includes: TR1, TR2, TR3, TR4 online water treatment equipment units, pulp refining in the pulping process; primary and secondary pulp washing; bleaching and rinsing processes, using flocculation and mechanical filtration, precision Filtration and ultrafiltration devices carry out water treatment, and the desalination treatment equipment unit TR5 ensures the final desalination of circulating water. The water treatment process of the present invention is that after the flocculant is added to the sewage, the whole process is in the process of changing the fluid form, biochemical polymerization reaction and mechanical physical movement, and the pollution factors are rapidly flocculated and freed during the flow process, and the fine particles in the water can be removed. Particulate impurities form hydrophilic and insoluble large groups of substances that are easy to filter, and can dehydrate pollutants into dry matter. The invention has less equipment investment; the treated water is recycled; and no waste liquid is discharged. The invention can be applied to paper pulping, urban sewage and industrial sewage treatment, and has remarkable economic benefits.

The invention relates to a liquid organic fertilizer preparation method, which comprises: mixing 1000 parts by weight of deteriorated seafood, 5-15 parts by weight of urea, 50-120 parts by weight of plant ash, and 500 parts by weight of water, placing the uniformly mixed material into a fermentation tank, and carrying out aerobic fermentation for a certain time to prepare the liquid organic fertilizer, wherein the mixed material is flipped every 5-7 days. According to the present invention, the liquid organic fertilizer is added to water according to a ratio of 5-8%, and the obtained mixture is applied at the root part of crops.