114results about How to "Reduce the content of heavy metal ions" patented technology

The invention discloses compound used for removing heavy metal ions. Compound structurally comprising functional groups capable of providing lone pair electrons is loaded on a polymer carrier and can form coordinate bonds with the heavy metal ions. The compound can remove heavy metal ions in traditional Chinese medication extract or industrial waste water and the like high-efficiently and rapidly, thereby having industrializing prospect.

The invention discloses a eucalyptus dissolving pulp and a production method thereof, wherein the eucalyptus dissolving pulp is prepared after the steam prehydrolysis, sulfate cooking, oxygen delignification and D0EoPD1 bleaching of eucalyptus pieces, the whiteness is not less than 88%, the alpha cellulose is not less than 94.5%, the pentosan is not higher than 3.0%, the dynamic viscosity is 9-25mPa s, the ash content is not higher than 0.1%, and the iron content is not higher than 15mg kg<-1>. The production method of the eucalyptus dissolving pulp comprises the following steps that: the eucalyptus pieces undergo the steam prehydrolysis, and the P- factor of the steam prehydrolysis is 300-800; the sulfate cooking is carried out after the steam prehydrolysis of the eucalyptus pieces to obtain the pulp; the eucalyptus chemical pulp undergoes the D0EoPD1 bleaching after the oxygen delignification; and after the bleaching, the pulp is washed, dried and processed into the eucalyptus dissolving pulp.

The invention provides a treatment method for high-concentration mixed salt organic wastewater. The treatment method for the high-concentration mixed salt organic wastewater comprises the following steps: carrying out coagulating sedimentation on the high-concentration mixed salt organic wastewater, so as to obtain sediments and mixed liquor; carrying out vacuum fractionation on the mixed liquor, so as to obtain fraction and fractional distillate; carrying out evaporative crystallization on the fractional distillate, so as to obtain sodium salt and low-concentration mixed salt organic condensate wastewater; carrying out aerobic biological treatment on the low-concentration mixed salt organic condensate wastewater, so as to obtain low-concentration organic wastewater; carrying out reverse osmosis treatment on the low-concentration organic wastewater, so as to obtain treated wastewater and a reverse osmosis concentrate solution; and carrying out evaporative crystallization on the reverse osmosis concentrate solution, so as to obtain sodium salt, wherein the high-concentration mixed salt organic wastewater contains sodium salt, heavy metal ions and organic matters. The treatment method for the high-concentration mixed salt organic wastewater has the advantages that the sodium salt in the wastewater can be efficiently recycled, treated wastewater can meet industrial usage requirements, reuse rate is high, and zero wastewater discharge is realized. The invention also provides a treatment system for the high-concentration mixed salt organic wastewater.

A papermaking wastewater advanced treatment and recycling device and a method thereof relate to the treatment of papermaking wastewater. The invention provides a papermaking wastewater advanced treatment and recycling device which combines the nanometer catalytic electrolysis technology with the membrane technology, has lower cost and higher efficiency and can recycle wastewater, and a method thereof. The papermaking wastewater advanced treatment and recycling device is provided with a nanometer catalytic electrolysis system, a membrane filtration separation system and a membrane cleaning regeneration system. The method of the invention comprises the following steps: papermaking wastewater is extracted by a water pump and introduced in a nanometer catalytic electrolysis tank to perform nanometer catalytic electrolysis, then the obtained water is introduced in a filtering tank for filtration to remove the solid impurities, plankton, bacteria and colloid in wastewater and obtain the purified wastewater; and the purified wastewater is filtered and separated by the membrane filtration separation system to obtain dialyzate and concentrated solution, wherein the dialyzate is used for recycling; and one part of the concentrated solution flows back to the nanometer catalytic electrolysis system and the other part is directly discharged.

The present invention relates to an insect-preventing nuisance-free ecological liquid fertilizer, its component composition includes chitoglycan organic nutrient matter, amino acid organic nutrient matter, conventional fertilizer nutrients and mineral nutrient. Said liquid fertilizer not only can be used as fertilizer, but also has the action of preventing insects, and contains no any harmful substances.

Provided is an apparatus for producing reclaimed water based on electrolysis and double membrane technologies. The apparatus is disposed with an electrolysis system, an MBR system and a reverse osmosis system. Further provided is a method for producing reclaimed water using the apparatus, comprising the following steps: retrieving biochemical sewage through a water pump (12) and inputting the biochemical sewage into an electrolysis apparatus (13) of the electrolysis system to be electrolyzed, then enabling the sewage to enter an MBR reaction tank (26) through a grid (22) to obtain primary reclaimed water, pumping the primary reclaimed water into the reverse osmosis system with a high pressure pump (45) to separate dialysis water and concentrated water, enabling the dialysis water to enter a reclaimed water storage tank (48) to obtain ultrapure reclaimed water, enabling a part of the concentrated water to flow back for cyclic membrane filtering and separation, enabling a part of the concentrated water to flow back to enter an electrolysis procedure for cyclic use, and discharging the rest part of the concentrated water.

The invention relates to a sensitization-free and activation-free chemical silvering method for a polyamide base body. The method comprises the following steps: (1) soaking a polyamide fabric in a pretreatment solution, washing, taking out and cleanly rinsing to obtain the washed polyamide fabric, and performing ultraviolet laser radiation to obtain the treated polyamide fabric; (2) preparing chitosan and polyvinyl alcohol mixing solution, adjusting the pH value by using glacial acetic acid, and dropwise adding a cross-linking agent under a stirring state to obtain a chitosan derivative solution; (3) soaking the treated polyamide fabric obtained in the step (1) in the chitosan derivative solution, and baking to obtain the polyamide fabric modified by chitosan derivatives; and (4) soaking the modified polyamide fabric in a silvering reaction solution, chemically plating, performing vibrating reaction in a vibrating dyeing machine, and then taking out, washing and drying to obtain the polyamide base body. The preparation method is simple and convenient, production conditions and requirements are simple, and according to the method, sensitization-free and activation-free effects are achieved, the production cost is low and the environmental pollution is low.

The invention discloses a comprehensive wastewater reuse treatment method for a waste incineration power plant. The method comprises the steps of production sewage pre-treatment, flue gas wastewater pre-treatment, domestic sewage pre-treatment, landfill leachate pre-treatment, reverse osmosis deep treatment and dehydration treatment. According to the method, landfill leachate and domestic sewage are mixed and subjected to facultative and aerobic treatment, so that COD and NH3-N in the landfill leachate can be effectively reduced, the proportion of pollutants in sewage can be balanced, the mixed liquid has good biodegradability, and the effluent quality is good; the pretreated production wastewater, the biodegraded landfill leachate and domestic sewage are subjected to combined deep treatment, and only one set of treatment device is needed, so that the investment cost is reduced; and sewage combined treatment is adopted, so that the content of COD and heavy metal ions in the sewage which enters a reverse osmosis system can be effectively reduced, the problem of reverse osmosis membrane blockage can be effectively relieved, the frequency of chemical cleaning can be reduced, and the service life of the reverse osmosis membrane can be prolonged.

The application provides a mineral processing tailing wastewater treatment method. The mineral processing tailing wastewater treatment method comprises the following steps: A), mixing the mineral processing tailing wastewater and a destabilizing agent to obtain destabilized wastewater; B), mixing the destabilized wastewater and a first coagulant and sedimenting to obtain tailing wastewater supernatant and flocs; and C), mixing the tailing wastewater supernatant and a second coagulant and sedimenting to obtain purified water. During the treatment of mineral processing tailing wastewater, the wastewater is firstly destabilized so that suspended solids in the tailing wastewater is free from the steady state and then the destabilized tailing wastewater is further purified by virtue of a two-stage coagulating sedimentation method in a connected-in-series manner so as to accelerate the formation and sedimentation of coarse particle polymers, the contents of the suspended solids and heavy metal ions in the wastewater are decreased in a short time and the environmentally acceptable discharge of the wastewater is achieved.

The invention discloses a method for solidifying tailing sands by active magnesium oxide-based microorganisms, and a product thereof. Active magnesium oxide is used as a basic solidifier, and a microbial technology is used to provide CO2 required for carbonization and reduce heavy metals in the tailing sands, so the advantages of a technology for solidifying soil with magnesium oxide and the microbial technology are fully used; carbonate ions produced by hydrolysis of urea with bacillus are used for carbonizing the magnesium oxide solidified soil, so the strength of bricks is improved; and theextracellular complexation effect, extracellular precipitation effect and intracellular accumulation effect of the microorganisms on the heavy metals are used to reduce the content of heavy metal ions. The method has the advantages of simple process, sintering avoiding, short construction period, high strength, greenness, environmental friendliness, achieving of the win-win situation of environmental benefits and economic benefits, and good application prospect.

The invention discloses bitter apricot kernel oil with high nutritive value and an extraction method thereof. The bitter apricot kernel oil and the extraction method have the beneficial effects that bitter apricot kernels are taken as the raw materials, and the low temperature biological processing technology is adopted in the whole course, thus effectively avoiding losses of thermosensitive nutrients in the bitter apricot kernels, such as proteins, higher fatty acids and vitamins; free oil, emulsion, hydrolysate and apricot kernel residues are obtained after enzyme deactivation by microwave irradiation, freezing and breaking, enzymolysis and vacuum centrifuging; the emulsion undergoes vacuum centrifuging after undergoing biological demulsification to obtain free oil; the free oil is mixed to prepare the bitter apricot kernel oil with high oil extraction rate (93-97%), high nutrient and active substance content, strong food safety (the residual quantity of cyanides is below 0.08mg / kg) and long shelf life (5-6 years); the extraction method has the effects of increasing the variety, yield and added value of the byproducts after oil extraction while increasing the product quality and yield, further reducing the oil extraction cost, completely eradicating discharge of the three wastes and protecting the environment.

The invention relates to an acid-and-alkali-corrosion-resistant environment-friendly lubricating grease composition and a preparation method. The acid-and-alkali-corrosion-resistant environment-friendly lubricating grease composition is prepared from 20%-30% of high alkali synthesis calcium sulfonate, 0.1%-2% of conversion accelerant, 0.1%-3% of glacial acetic acid, 1%-4% of fatty acid, 0.1%-4% of phosphoric acid, 1%-3% of calcium hydroxide, 1.5%-7.5% of additives and high-viscosity synthetic base oil. An acid solution or an alkaline solution with the mass fraction of 10% is added to lubricating grease for conducting performance testing again, and the lubricating grease prepared from high alkali synthesis calcium sulfonate has the better water resistance, corrosion resistance, shearing resistance and extreme pressure antiwear property. Due to the characteristics of the high-viscosity synthetic base oil and a calcium sulfonate thickening agent, no emulsification or thinning phenomenon occurs to the lubricating grease when the lubricating grease is immersed in the acid solution or the alkaline solution, and the good adhesion property is achieved. Due to the fact that a strong ion exchanger, namely, calcium hydroxylapatite is added, calcium ions in molecules can replace heavy metal ions and the like in a water solution, and the good environment-friendly effect is shown.

The invention discloses bitter almond oil and an extraction method thereof. Bitter almonds are taken as raw materials, a low-temperature and biological processing technique is adopted in the whole process, loss of thermal-sensitive nutritional substances such as protein, higher fatty acid, vitamins and the like in the bitter almonds is effectively avoided, free oil, an emulsion, hydrolysate and almond dregs are obtained after microwave radiation sterilization, frozen-breaking, enzymolysis and vacuum centrifugation, free oil is obtained after the emulsion is subjected to biological demulsification and vacuum centrifugation, all the free oil is combined, and the bitter almond oil is obtained, wherein the bitter almond oil has a high oil extraction rate being 93%-97%, the content of nutritional and active substances is high, the food safety is high, the residual amount of cyanide is under 0.08 mg / kg, and the guarantee period of the bitter almond oil is long and can reach 5-6 years. With the adoption of the extraction method, the quality and the yield of products are improved, meanwhile, the variety, the yield and the additional value of byproducts obtained after the oil is extracted are increased, the extraction cost of the oil is further reduced, discharging of three wastes is avoided, environment protection is realized, and low-carbon production is truly realized.

The invention discloses a method for removing EDTA (Ethylene Diamine Tetraacetic Acid) in rinsing waste water. According to the method, three process units, namely oxidation treatment under ultraviolet irradiation, flocculation and sedimentation and pH value callback are adopted. According to the method, hydrogen peroxide is oxidized under ultraviolet irradiation in the presence of a specific catalyst so as to realize EDTA removal of the rinsing waste water containing EDTA, and the problem of membrane blockage caused by existence of an EDTA complex during a water recycling process is effectively solved. Meanwhile, by virtue of the method provided by the invention, EDTA removal and metal ion content reduction are realized simultaneously, the problems of high energy consumption and long cycle in the conventional treatment process of waste water containing EDTA are solved, and the purposes of low equipment investment, small occupied area, slight equipment transformation and low operating cost are achieved. Meanwhile, the problem that waste water containing heavy metals and waste water containing EDTA cannot be treated simultaneously by a biochemical method is solved.

The invention discloses a high-density pleurotus eryngii liquid strain fermentation medium and belongs to the technical field of pleurotus eryngii cultivation. Chinese herb extracts capable of improving strain cold and heat resistant irritability, immunity and infectious microbe resistant capacity are scientifically compounded in media of all stages of liquid seeds, shaking seeds, seed tank seeds and fermentation tank liquid strains; wood chip powder with raw material adaptation and a defoamer function is scientifically compounded; the spawn age and the multiplication algebra difference are shortened, and coated chitosan with special functions is fed timely, accordingly, pleurotus eryngii liquid strains which are thick in fermentation hypha, high in activity, small in mycelium pellet diameter, large in density and uniform in distribution are cultivated, the mycelium pellet density ranges from (4.5-5.5)*105 / L, the mycelium pellet diameter ranges from 0.5mm to 0.7mm, the mycelium pellet dry weight ranges from 90g / L to 100g / L, germination time is in a range of 4h to 5h, and the exopolysaccharides is 3.0g / L to 3.5g / L.

The invention relates to mineral processing process, in particular to process for selecting marmatite from high ferric sulphide ore. The process includes the steps of ore grinding, roughing I, fine selecting and primary tailing disposing. The process for selecting marmatite from high ferric sulphide ore can effectively reduce usage of lime, achieves the purposes of energy conservation and environment protection, improves recovery rate and grade of the marmatite, can well separate the marmatite from the high ferric sulphide ore, improves indium-containing grade, and achieves comprehensive utilization effects of ore resources.

The invention discloses a method for removing heavy metal ions in fruit and vegetable juice by using chelate resin in cooperative treatment. At least two kinds of chelate resin are added into fruit and vegetable juice needing removing heavy metal irons, the chelate resin includes selective arsenic removing resin, selective hydragyrum removing resin or selective cuprum / nickel removing resin. In the method, by utilizing specific chelations of functional groups of modified chelate resins to different heavy metal irons, more than two kinds of special chelate resin for removing certain heavy metal irons are selected and organically combined so as to effectively, fast and conveniently remove heavy metal irons in fruit and vegetable juice. The method is easy and convenient to use, has fast effect, and is especially suitable for removing heavy metal irons in fruit and vegetable juice on site.

The invention discloses a pleurotus eryngii liquid strain with small and many mycelium pellets and a fermentation method of the pleurotus eryngii liquid strain, and belongs to the technical field of pleurotus eryngii cultivation. Chinese herb extracts capable of improving cold resistance, heat irritability resistance, immunity and bacterium-resisting capacity of the strain are scientifically compounded in culture mediums for liquid seeds, shaking flask seeds, seeding tank seeds and fermentation tank liquid strains in all stages, and meanwhile wood powder which has the feedstock adaptability and has the function of an antifoaming agent is scientifically compounded; manners of supplemental inoculation and segmentation variable temperature fermentation are adopted, and therefore the difference between the strain cell age and the multiplication algebra is shortened; and packaged chitosan with a special function is properly fed, and the pleurotus eryngii liquid strain with the thick and solid fermentative hyphae, high activity, small mycelium pellet diameter, large density and uniform distribution is cultured. The density of the mycelium pellets ranges from 4.5*10<5>piece / L to 5.5*10<5>piece / L, the diameter of the mycelium pellets ranges from 0.5mm to 0.7mm, the dry weight of the mycelium pellets ranges from 90g / L to 100g / L, the germination time ranges from 4 hours to 5 hours, and the exopolysaccharide ranges from 3.0g / L to 3.5g / L.

The invention discloses a planting method of selenium-enriched organic rice. The method comprises the steps of 1, field management, wherein a heavy metal adsorbing material with a thickness of 5-10 cm is laid after rice field soil is deeply plowed by 55-70 cm, then soil refilling is carried out, next, underground water is poured to soak the rice field for 20-30 days, again, the soil is exposed under the sun for 3-5 days after the water is drained, the heavy metal adsorbing material is taken out, and finally, an inorganic fertilizer with a thickness of 2-4 cm is buried at the 10-15 cm position of the soil; 2, transplanting management; 3, fertilization management, wherein firstly an active material is sprayed 1-3 hours before a selenium-rich leaf force fertilizer is sprayed, and the spraying quantity of the active material is 10-20 kg / mu. The selenium-rich organic rice planted through the planting method is fine and long in granule, crystal, transparent, soft and non-stick, the content of organic selenium is high, the incidence of diseases and insect pests is low, the content of heavy metal is low, and the selenium-rich organic rice has market competitiveness.

The invention provides a preparation method of a modified extracting solution and a method for reducing contents of heavy metal ions in a papermaking method tobacco sheet. The extracting solution is prepared by adopting modified epidesmine, and used for a technology for the low contents of the heavy metal ions in dipping and coating production of the papermaking method tobacco sheet. The available heavy metal materials are mainly produced by factors such as soil, air and fertilizer for tobacco planting, and a mechanical contact in a tobacco manufacturing procedure, and tobacco stems and tobacco powder for manufacturing the tobacco sheet come from natural tobacco leaves. A paper base is recoated by extracts of the tobacco stems and tobacco powder in the manufacturing process of the papermaking method tobacco sheet. The modified epidesmine has a very good ion-exchange property; and after the epidesmine is added to recoated paint for reaction, the modified zeolite is removed by filtering, so that the contents of the heavy metal ions in the tobacco sheet are lowered, cigarettes have no offensive odor, and the method has the characteristic of simple technology, and the cost is lowered.

The invention discloses oxidization-resistant bitter almond oil and an extraction method thereof. Bitter almonds serve as a raw material, a low-temperature biological processing technology is adopted in the whole process, the loss of thermosensitive nutrient substances such as protein, higher fatty acid and vitamins in the bitter almonds is effectively avoided, free oil, emulsion, hydrolysate and almond residue are obtained through microwave irradiation enzyme deactivation, refrigeration crushing, enzymolysis and vacuum centrifugation, the emulsion undergoes biological demulsification and then undergoes vacuum centrifugation again to obtain free oil, and the free oil is merged to obtain the bitter almond oil which is high in grease extraction rate (93-97%), nutrition and active material content and food safety (the cyanide residue is 0.08 mg / kg or below) and long in guarantee period (5-6 years). According to the extraction method, the variety, yield and added value of by-products after grease extraction are increased while the product quality and yield are improved, the grease extraction cost is further reduced, the emission of three wastes is avoided, and the environment is protected.

The invention discloses a high-density pleurotus eryngii liquid strain and a fermentation method thereof, and belongs to the technical field of pleurotus eryngii cultivation. Scientific compounding is carried out on Chinese herb extracts capable of improving the cold resistance, thermal stress, immunity and infectious microbe resisting capacity of the strain in culture media of liquid seeds, shake flask seeds, seeding tank seeds and fermentation cylinder liquid strains at all stages, meanwhile, scientific compounding is carried out on wood bit powder with raw material adaptability and antifoaming agent functions, a supplemental inoculation and subsection temperature varying fermentation mode is adopted, the cell age of the strain and the multiplication generation gap are shortened, coated chitosan with the special function is fed in good time, the pleurotus eryngii liquid strain with thick and solid fermentation mycelia, high activity, the small mycelium pellet diameter, large density and even distribution is cultured, the mycelium pellet density is 4.5-5.5*105 per liter, the diameter of the mycelium pellet is 0.5 mm to 0.7 mm, the dry weight of the mycelium pellet is 90 g / L to 100 g / L, germinating time is 4 h to 5 h, and exopolysaccharides is 3.0 g / L to 3.5 g / L.

The invention relates to agricultural microorganism bacterium fertilizer granules which are prepared from, by weight, 5-10 parts of biological bacteria, 40-50 parts of sorghum residue, 10-20 parts of weed, 1-5 parts of cytex, 2 parts of chitosan, 5 parts of olivine powder, 2-5 parts of microelements, 1-2 parts of physical and chemical regulation factors, 5-10 parts of water, and a coating agent saccharose and 8-hydroxyquinoline. The invention further relates to a preparation method of the agricultural microorganism bacterium fertilizer granules. The preparation method comprises the steps of fermentation, granulation and two-layer coating. The agricultural microorganism bacterium fertilizer granules have the advantages that crop growth is promoted, plant diseases and insect pests are reduced, the chemical fertilizer utilization rate is improved, environmental pollution is reduced, and the heavy metal content in soil is reduced.

The invention discloses an improved saline-alkali soil type bio-organic compound fertilizer and a preparation method thereof, and belongs to the technical field of fertilizers. The bio-organic compound fertilizer is prepared from beer wastewater treatment station sludge, weathered coal, agricultural production wastes, trace elements, zinc ion-porphyrin nanocomplex, vermiculite powder, livestock manure biogas slurry, a compound microbial agent, humic acid, edible fungus residue and polycaprolactone according to a certain weight ratio. The bio-organic compound fertilizer is suitable for medium-light saline-alkali soil, can significantly reduce the content of alkali and salt in soil, significantly improve physical and chemical properties of soil, improve soil granular structure, alleviate soil hardening problem and improve soil permeability and water and fertilizer retention, improves utilization rate, and significantly increases the yield and income of crops.

The invention relates to a sustained release fertilizer capable of reducing the content of heavy metal ions in soil and a preparation method thereof. By adopting sodium sulfide, polyvinyl alcohol, aluminum nitrate nonahydrate, magnesium nitrate hexahydrate, lignin and urea as reaction raw materials, the sustained release fertilizer with sulfur-containing hydrotalcite and lignin as carriers is prepared through a reaction. Sulfur ions in the sustained release fertilizer and the heavy metal ions can generate a water-insoluble sulfide precipitate, the effect of reducing the content of the migration-state heavy metal ions in the soil is achieved, and meanwhile a compound composed of sulfur-containing hydrotalcite and lignin has the sustained release function on urea. The dual-functional fertilizer can reduce environmental pollution caused by excessive heavy metal ions in the soil and reduce the cost of soil treatment without affecting normal agricultural production.

The invention discloses a fly ash and coal ash hydrothermal reaction solid-liquid phase product cooperative treatment method, and belongs to the technical field of fly ash hydrothermal treatment. The method comprises the following steps: mixing fly ash, coal ash, a treating agent and ultrapure water, and carrying out hydrothermal treatment; the pH value of the treating agent is 11-13, the treating agent comprises a treating agent A, and the treating agent A is an alkaline solution with the ionization equilibrium constant KA larger than 0.05; the treatment agent B is an alkaline solution of which the ionization equilibrium constant KB of primary ionization is equal to 10 <-6 >-10 <-3 >; the treatment agent C is Ca < 2 + > salt with the concentration from 10 <-5 > mol / L to 10 <-3 > mol / L. According to the method, the heavy metal content in the hydrothermal liquid can be effectively reduced while the heavy metal concentration in the hydrothermal solid-phase product is reduced.

The invention discloses a garbage incineration fly ash treatment method and in particular relates to the technical field of environment engineering. The garbage incineration fly ash disposal method specifically comprises the following steps: S1, carrying out washing pre-treatment on fly ash; S2, carrying out initial leaching treatment on an ash / water mixed system after washing by using an inorganic solvent; and S3, carrying out secondary leaching by way of organically combining alkali leaching and acid leaching. By carrying out washing pre-treatment on the fly ash generated by combustion of household garbage by water and adding an inorganic agent solution into the ash / water mixed system after washing for initially leaching heavy metal ions, the inorganic agent solution and the heavy metalions in the fly ash are coordinated to form a stable soluble compound, and the ash / water mixed system after initially leaching the heavy metal ions in the fly ash by using the inorganic agent solutionis secondarily leached by way of organically combining alkali leaching and acid leaching, so that the content of the heavy metal ions in the fly ash can be reduced greatly.

The invention discloses a multi-element biological organic soil improved fertilizer and a preparing method thereof. The fertilizer is prepared from, by certain weight, urea, monoammonium phosphate, potassium chloride, domestic animal slaughtering waste, humic acid, expanded perlite, composite microbial agent, plant straw, potassium fulvic acid, copper sulfate, ferrous sulfate, zinc ion-porphyrin nanometer complex and nanometer titania powder. The fertilizer is reasonable in formula, balanced nutrients are released, nutrient requirements for the growth of crops are fully met, the yield of the crops can be obviously increased, and the quality of the crops can be obviously improved; meanwhile, the phenomenon that soil is hardened can be obviously avoided, and the content of heavy metal ions in the soil is lowered.

The invention discloses a liquid strain fermentation culture medium, and belongs to the technical field of pleurotus eryngii cultivation. Chinese herb extracts capable of improving cold resistance, heat irritability resistance, immunity and bacterium-resisting capacity of the strain are scientifically compounded in culture mediums for liquid seeds, shaking flask seeds, seeding tank seeds and fermentation tank liquid strains in all stages, and meanwhile wood powder which has the feedstock adaptability and has the function of an antifoaming agent is scientifically compounded; manners of supplemental inoculation and segmentation variable temperature fermentation are adopted, and therefore the difference between the strain cell age and the multiplication algebra is shortened; and packaged chitosan with a special function is properly fed, and the pleurotus eryngii liquid strain with the thick and solid fermentative hyphae, high activity, small mycelium pellet diameter, large density and uniform distribution is cultured. The density of the mycelium pellets ranges from 4.5*10<5>piece / L to 5.5*10<5>piece / L, the diameter of the mycelium pellets ranges from 0.5mm to 0.7mm, the dry weight of the mycelium pellets ranges from 90g / L to 100g / L, the germination time ranges from 4 hours to 5 hours, and the exopolysaccharide ranges from 3.0g / L to 3.5g / L.