32results about How to "High in nitrogen and phosphorus" patented technology

The invention discloses a system and method for repairing organic contaminated soil through sludge microwave gasification residues in a targeting mode, and belongs to the technical field of contaminated soil repairing. The system comprises a first stirring and mixing device, a gasification reactor, a second stirring and mixing device, a desorption reactor and a screening device. Dewatered sludge is pyrolyzed and carbonized in the gasification reactor to form sludge carbon, through the characteristic of multi-pore adsorption and absorption of microwave assisted heating, the desorption of pollutants in the soil can be effectively promoted in the process of mixing the sludge with the organic contaminated soil, and organic matter in the soil is adsorbed; and in the subsequent microwave heating process of the desorption reactor, the organic matter adsorbed on the sludge carbon is volatilized in a gas form, and the residual sludge carbon returns to the first stirring and mixing device and the second stirring and mixing device to participate in sludge carbonization and organic matter adsorption. Sludge treatment and organic contaminated soil treatment are combined to achieve the purpose of treating waste with waste, the sludge carbon can be recycled after adsorption and desorption, and the cost is lowered.

The invention discloses a domestication method of nostoc and application thereof. The domestication method comprises the following steps of: preparing a specific culture medium; carrying out salt tolerance domestication, nitrogen and phosphorus content reduction domestication, domestication of adaptability to water to be treated, and the like on screened nostoc species; carrying out step-by-step amplification culture; then leading the nostoc species into a saline and alkaline land, wherein the nostoc is propagated in large quantities by utilizing photosynthesis and absorbs and fixes nitrogen and phosphorus elements contained in atmosphere and water sources; and after the nostoc is propagated, draining culture water for the nostoc, wherein the nostoc is deposited in soil and contains a large quantity of elements, i.e. nitrogen, phosphorus, and the like. After primary treatment is carried out by using the domestication method, the nitrogen contained in the soil is increased by 18-21 percent, the phosphorus is increased by 12-14 percent, and full salt content is reduced by 15-18 percent, therefore not only is nutrient element loss caused by a water washing method prevented, but also the hardening of the soil and the secondary pollution to the water sources and environments, which are caused by chemical fertilizer application, are prevented; and in addition, soil fertility is gradually enhanced and soil restoration is accelerated through multi-time treatment, therefore the purpose of improving an ecological environment is finally achieved.

The invention aims to the problem of difficult treatment on orange peel residues and municipal sludge and low recycling utilization rate and discloses a method of producing biogas by recycling orange peel and dehydrated sludge through fermentation. In the method, the orange peel residue and the dehydrated sludge are employed as raw materials to perform anaerobic fermentation, wherein the fermentation pH is regulated through a quick lime supernatant. The method allows continuous fermentation and batch fermentation. In the method, the characters that the orange peel residue is high in organic substance content and the dehydrated sludge is high in nitrogen and phosphorus contents and is abundant in microorganism colonies are fully utilized, thereby not only effectively solves the problems of recycling the orange peel residue and the municipal sludge, but also increasing common fermentation efficiency of the orange peel residue and increasing the utilizability of biogas residue and biogas liquid as fertilizers after common fermentation of the orange peel residue. The method is excellent in economic and environmental benefit.

The production method is suitable for the technical field of organic fertilizers, and provides a production method for producing an organic fertilizer by using cow dung. The production method is simple in steps, and cow dung, waste vegetable leaves and waste animal internal organs are used as main raw materials of the organic fertilizer and are humified under the action of a fermentation bacteriaagent; the cow dung is high is high in organic matter content and low in mineral element content, so that the physical property of viscous soil can be improved, and water permeability and air permeability of the viscous soil can be improved; the waste vegetable leaves contain rich potassium, phosphorus and other microelements, so that on one hand, nutrition is provided for the fermentation bacteria agent, and on the other hand, nutritional ingredients in the organic fertilizer are increased; and the animal internal organs contain a large amount of microorganisms and have a high content of nitrogen and phosphorus, so that humification is further facilitated, and the recycling rate of wastes in the ecological environment is also greatly improved.

The invention belongs to the field of agricultural planting, and particularly relates to a carbon-based bio-enzyme fertilizer and a preparation method thereof. The carbon-based bio-enzyme fertilizer comprises an organic fertilizer, biochar, wheat bran, enzymes, molasses and beneficial bacteria, wherein the organic fertilizer comprises organic materials, urea and calcium phosphate. The carbon-basedbio-enzyme fertilizer can increase the organic matter content of soil, promote the growth of microorganisms in soil, increase a total microorganism amount and effective microbial communities in the soil, increase the pH value of the soil and adjust the pH value of the soil; and the carbon-based bio-enzyme fertilizer improves the activity of protease and urease in the soil, so the activity of thesoil is enhanced, soil fertility is improved, soil continuity is maintained, the disease resistance of crops is enhanced, nutrients required by crop growth are provided, the yield of grain crops is increased, and the quality of the grain crops is improved.

The invention discloses a domestication method for microcoleus vaginatus and application thereof. The method comprises the following steps of: preparing a special culture medium, performing domestications such as salt tolerance domestication, nitrogen-phosphorus content reducing domestication, adaptability to water to be treated and the like on the screened algae seeds, introducing the algae seeds into a saline-alkali land after gradual amplification culture, propagating a great amount of microcoleus vaginatus by using photosynthesis, wherein the microcoleus vaginatus absorbs and fixes nitrogen and phosphorus elements in the atmosphere and the water source; and draining the microcoleus vaginatus culture water after propagation, and depositing the microcoleus vaginatus in the soil, wherein the microcoleus vaginatus contains a large amount of elements such as nitrogen, phosphorus and the like. After one-time treatment of the method, the nitrogen in the soil is increased by 19 to 22 percent, the phosphorus is increased by 13 to 15 percent, and the full salt quantity is reduced by 25 to 30 percent; and the method avoids nutrient element loss caused by a washing method, avoids hardening of the soil and secondary pollution of the water source and the environment due to the application of fertilizers, can gradually enhance the soil fertility by multiple times of treatment, can accelerate soil recovery, and finally fulfills the purpose of improving the ecological environment.

The invention discloses a method for domesticating cylindrospermum and application thereof. The method comprises the following steps of: preparing a specific culture medium; carrying out salinity tolerance domestication on the screened algaes; reducing the domestication of nitrogen and phosphorus contents; adapting to the domestication on the quality of water to be treated and the like; introducing the algaes into saline and alkaline land after gradual amplifying culture; reproducing the algaes in a large mount by using photosynthesis; absorbing and fixing nitrogen and phosphorus elements in the atmosphere and water sources; after reproduction, draining algaes breeding water; and depositing the algaes into soil, wherein the algaes contain a large amount of nitrogen, phosphor and other elements. After the algaes are primarily treated, the nitrogen in the soil is increased by 18-20 percent, the content of phosphor is increased by 11-13 percent and the content of all salts is reduced by 12-15 percent. The invention not only prevents nutrient elements by a washing method from being lost, but also prevents applied fertilizer from hardening soil and secondary pollution to the water source and the environment; and after multiple treatments, the soil fertility can be gradually enhanced, the soil restoration can be accelerated and the finally the aim of improving the ecological environment can be achieved.

The invention discloses a nitrogen-phosphorus non-point source pollution control and recycling system and method for a farmland, and relates to the field of agricultural environmental protection. The system comprises: a main ridge arranged around the farmland, branch ridges arranged inside the farmland vertically and horizontally, and an aquatic plant cultivation trench arranged around the main ridge, wherein green plants are cultivated on the main ridge and the branch ridges respectively, and aquatic plants are cultivated in the aquatic plant cultivation trench; multiple pipelines are buried in earth between a water collection facility and the aquatic plant cultivation trench; a filtration adsorption facility is a filtration adsorption tank, and comprises a first buffer area, a filter screen, a nitrogen-phosphorus adsorption material and a second buffer area; a water suction pump is arranged in the first buffer area, and a water pump is arranged in the second buffer area; a water storage facility is a reservoir, and a drain valve is arranged on the water storage facility. According to the nitrogen-phosphorus non-point source pollution control and recycling system and method for the farmland, agricultural non-point source pollution can be better controlled, and nitrogen-phosphorus elements can be effectively recycled.

The invention discloses a method for removing and recycling copper from magnesium ammonium phosphate sludge and belongs to the field of urban living wastewater and industrial wastewater treatment and recycling. The heavy metal content of obtained magnesium ammonium phosphate sludge exceeds the standard due to low-concentration heavy metal in wastewater. In order to directly apply magnesium ammonium phosphate sludge to a farmland as a fertilizer, the method comprises the following steps: adding concentrated ammonia water and ammonium salt into the magnesium ammonium phosphate sludge comprising copper, mixing in a vibration manner, carrying out vacuum filtration after fully reacting, drying filter residues in the shade so as to obtain purified magnesium ammonium phosphate, carrying out electrolysis on filtrate which is obtained after solid-liquid separation, recycling elementary copper, mixing electrolyte with the magnesium ammonium phosphate containing copper, and realizing recycling. The copper content of the magnesium ammonium phosphate sludge treated by the method meets Control Standards for Pollutants in Agricultural Sludge (GB4282-84). The technology is simple and easy to operate. The problem that the quality of the magnesium ammonium phosphate sludge is reduced due to the existence of the copper in the wastewater is solved. The copper also can be recycled in the elementary form after being separated. Ammonia leach liquor can be recycled, and chemical cost is saved.

The invention discloses a domestication method of nostoc and application thereof. The domestication method comprises the following steps of: preparing a specific culture medium; carrying out salt tolerance domestication, nitrogen and phosphorus content reduction domestication, domestication of adaptability to water to be treated, and the like on screened nostoc species; carrying out step-by-step amplification culture; then leading the nostoc species into a saline and alkaline land, wherein the nostoc is propagated in large quantities by utilizing photosynthesis and absorbs and fixes nitrogen and phosphorus elements contained in atmosphere and water sources; and after the nostoc is propagated, draining culture water for the nostoc, wherein the nostoc is deposited in soil and contains a large quantity of elements, i.e. nitrogen, phosphorus, and the like. After primary treatment is carried out by using the domestication method, the nitrogen contained in the soil is increased by 18-21 percent, the phosphorus is increased by 12-14 percent, and full salt content is reduced by 15-18 percent, therefore not only is nutrient element loss caused by a water washing method prevented, but also the hardening of the soil and the secondary pollution to the water sources and environments, which are caused by chemical fertilizer application, are prevented; and in addition, soil fertility is gradually enhanced and soil restoration is accelerated through multi-time treatment, therefore the purpose of improving an ecological environment is finally achieved.

The invention discloses a method for preparing a biological fertilizer by using bean straw. The method comprises the following steps: a step 1, bean straw is sprinkled by a 5-6mmol / L lactic acid solution, the water content of the straw is 60-65%, and the bean straw is placed for 3-10 hours for standby; a step 2, peanuts and green soy beans are separately crushed, after well mixing, a ferment bacteria fertilizer is added, and well mixing is carried out; a step 3, a mixture in the step 2 is sprayed on the bean straw in the step 1, the bean straw is piled to a cone shape with height of 1-1.2m and width of 1.8-2m, and the bean straw is placed for 7-9 days. The lactic acid solution can obviously increase contents of nitrogen and phosphor as well as yield of early rice, because the lactic acid solution promote degradation of the bean straw, and improves the contents of nitrogen and phosphor in the fertilizer; the method is used for crops, and the ferment bacteria fertilizer can further increase contents of nitrogen and phosphor as well as yield of crops.

The invention relates to a novel nickel phosphide catalyst, the catalyst has a large specific surface area and pore volume, and is distributed in multi-level pores, and the catalyst is Ni 2 A composite material in which the P catalytically active centers are uniformly dispersed in the nitrogen-phosphorus co-doped carbon network skeleton. The preparation method includes the following steps: 1) Preparation of MOFs precursors containing nitrogen and phosphorus atoms: respectively weigh phosphorus-containing and nitrogen-containing organic ligands and nickel salts and dissolve them in a certain amount of deionized water to obtain three solutions; Nitrogen and phosphorus atom-containing MOFs precursors were synthesized by micro-droplet method; 2) A certain amount of nitrogen and phosphorus atom-containing MOFs precursors were placed in a corundum porcelain boat, and then calcined in a tube furnace to obtain nitrogen and phosphorus co-doping A nickel phosphide catalyst with evenly distributed catalytic centers covered by porous carbon. The catalyst of the invention has large specific surface area and pore volume, is beneficial to electrochemical catalysis, hydrodesulfurization, selective hydrogenation and other hydrogenation reactions, and has broad application prospects.

The invention discloses a vegetable-fat-base-contained nitrogen and phosphorus synergistic fire retardant and a preparation method and application thereof. The preparation method comprises the following steps: through modifying a biomass, acquiring a series of the vegetable-fat-base-contained nitrogen and phosphorus synergistic fire retardants, and phenolic resin for synthesizing the vegetable-fat-base-contained nitrogen and phosphorus synergistic fire retardant, finally uniformly blending with other assistants of a curing agent, a foaming agent, a surfactant and the like, pouring into a mould, curing in a certain temperature, to obtain foam. The phenolic foam of the vegetable-fat-base-contained nitrogen and phosphorus synergistic fire retardant has more excellent flame resistance and mechanical property compared with current pure phenolic foam, and because the fire retardant uses tung oil from a biomass source as a raw material at the same time, the vegetable-fat-base-contained nitrogen and phosphorus synergistic fire retardant has the double effects of saving resources and protecting environment.

The invention discloses a spirulina acclimatization method and application thereof. The method comprises of preparing a culture medium, carrying out salt resistance acclimatization, nitrogen and phosphorus content reduction acclimatization, to-be-treated water quality adaptation acclimatization and the like on screened algae. After the step-by-step amplification culture, the algae is introduced into kaline soil, the spirulina propagate massively by using the photosynthesis and absorbs and fixs nitrogen and phosphorus elements in the atmosphere and water sources, after the propagation, spirulina culture water is discharged, the spirulina is deposited in the soil, and the spirulina contains a large amount of elements such as nitrogen, phosphorus and the like. When the primary treatment is carried out by adopting the method, the nitrogen content in the soil is increased by 21 to 23 percent, the phosphorus content in the soil is increased by 11 to 14 percent, the total salt content is reduced by 20 to 25 percent, the nutrition element loss caused by a water washing method is avoided, the hardening on the soil and the secondary pollution to water sources and the environment caused by fertilizer application are also avoided, the soil fertility is gradually enhanced through performing the treatment many times, the soil recovery can be accelerated, and the goal of improving the ecological environment is finally achieved.

The invention discloses an anacardol group-containing nitrogen and phosphorus synergistic flame retardant and a preparation method and an application. A series of anacardol group-containing nitrogen and phosphorus synergistic flame retardants are obtained by modifying anacardol for synthesizing phenolic resin containing the anacardol group-containing nitrogen and phosphorus synergistic flame retardants, and finally, the phenolic resin is blended and mixed uniformly with other auxiliary agents such as a curing agent, a foaming agent and a surfactant, is poured into a mold, and is cured at a certain temperature to obtain foam. Compared with existing pure phenolic foam, the phenolic foam containing the anacardol group-containing nitrogen and phosphorus synergistic flame retardants not only ismore excellent in flame retardance and mechanical property, but also has the double functions of saving sources and protecting the environment as the flame retardants use anacardol of a biomass source as a raw material.

The invention aims to the problem of difficult treatment on orange peel residues and municipal sludge and low recycling utilization rate and discloses a method of producing biogas by recycling orange peel and dehydrated sludge through fermentation. In the method, the orange peel residue and the dehydrated sludge are employed as raw materials to perform anaerobic fermentation, wherein the fermentation pH is regulated through a quick lime supernatant. The method allows continuous fermentation and batch fermentation. In the method, the characters that the orange peel residue is high in organic substance content and the dehydrated sludge is high in nitrogen and phosphorus contents and is abundant in microorganism colonies are fully utilized, thereby not only effectively solves the problems of recycling the orange peel residue and the municipal sludge, but also increasing common fermentation efficiency of the orange peel residue and increasing the utilizability of biogas residue and biogas liquid as fertilizers after common fermentation of the orange peel residue. The method is excellent in economic and environmental benefit.

The invention relates to a cellulose-based nitrogen-phosphorus flame retardant and a preparation method thereof. The preparation method comprises the following steps: dissolving a cellulose derivative into a solvent under the stirring condition that the speed is 100-1000 revolutions per minute so as to form uniform phases, adding micromolecule amine compounds as an acid-binding agent, and introducing nitrogen, wherein the water content of the cellulose derivative is less than 1%; dropwise adding phosphorus oxychloride into the solution, and continuously stirring for 1-10 hours while the reaction temperature is maintained at 25-100 DEG C; washing until no chloride ion exists, adding amino compounds into water which serves as a solvent according to the solid-to-liquid ratio of (1 to 1)-(1 to 50), and continuously stirring for 1-10 hours while the reaction temperature is maintained at 25-100 DEG C; filtering and drying to obtain the cellulose-based nitrogen-phosphorus flame retardant, wherein the drying temperature is 40-100 DEG C. The cellulose-based nitrogen-phosphorus flame retardant and the preparation method of the cellulose-based nitrogen-phosphorus flame retardant are environmentally friendly, and the preparation method is easy, convenient and feasible.