616 results about "Ammonium nitrogen" patented technology

The invention relates to nitrogen element fertilizer, in particular to a nitrogen element fertilizer composite synergist and a preparation method thereof. The composite synergist consists of a biochemical inhibitor, a synergist, a nitrogen element stabilizer, a carrier and microelements, the weight portion ratio of the materials is 1:0.01-1: 0.01-0.5: 0.5-1: 0-0.05, wherein the biochemical inhibitor can be a nitrification inhibitor and a urease inhibitor, the synergist can be poly-aspartic acid, and the nitrogen element stabilizer can be hydrolyzed amino acid, humic acid, alginic acid or alginic acid water soluble salt. The preparation method comprises the following steps: crushing the raw materials, screening the raw materials with a sieve of 30 to 100 meshes, and stirring and mixing the raw materials according to the proportion. The nitrogen element fertilizer composite synergist is suitable for growing long acting nitrogenous fertilizer taking urea or ammonium nitrogen fertilizer as raw materials and can be applied to various soils together with urea or ammonium nitrogen fertilizer so as to effectively prolong the fertilizer efficiency period of the urea or the ammonium nitrogen fertilizer. The fertilizer efficiency period can reach 100 to 120 days. The nitrogen element fertilizer composite synergist has remarkable resistance to diseases, drought and lodging, effectively improves the capability of soil to reserve nutrients, and has good effects for off-season crops.

The invention relates to a synergistic fertilizer, in particular to a green and environmental protection synergistic slow-releasing nitrogen fertilizer which is mixed in ammonium nitrogen fertilizers or urea, and a preparation method thereof. The fertilizer constituents are as follows: nitrogen fertilizer, a biochemical inhibitor and a synergist, wherein, the weight portion ratio of the nitrogen fertilizer to the biochemical inhibitor to the synergist is equal to 1:0.005 to 0.1:0.0005 to 1; the biochemical inhibitor is a nitrification inhibitor, and the synergist is poly (aspartic acid). The preparation method is as follows: during the operation process of the nitrogen fertilizer, the biochemical inhibitor and the synergist are added into the fertilizer under the molten state of the fertilizer. The synergistic nitrogen fertilizer of the invention is suitable for various plants and soils. The fertilizer has notable disease-resistant, drought-resistant and lodging resistant effects on crops after being applied in soils, can effectively improve nutrients reserving power of soils and has certain effect on succession crops. Gain production can be increased by 8% to 30%, vegetable production can be increased by 14% to 60% and cash crop production can be increased by more than 30% by using the synergistic slow-releasing nitrogen fertilizer.

The invention discloses a preparation method of an embedding microbial agent for in-situ purification of a water body, which compounds a plurality of microbial strains suitable for the sewage treatment with enzyme preparation, and adds nutritive salt and growth factors needed by the microbial growth in an embedding carrier so as to be more suitable for the microbial growth, so that the defects of deficient nutrition of the water body and low sewage treatment efficiency are overcome. Active carbons with strong adsorption capacity and diatomite with greater specific gravity are added in the embedding carrier; polyglutamic acid is added in the embedding carrier; the polyglutamic acid reinforces the strength of embedding particles; meanwhile, glutamic acid obtained by degrading the polyglutamic acid can be used as nutritional ingredients for the strain growth, so that preparation can be preferably colonized in a river channel without easily losing. After the embedding microbial agent is used for treating sewage for three weeks, the ammonium-nitrogen removal rate reaches 85-90%, and the COD (Chemical Oxygen Demand) removal rate reaches 90-95%.

The invention discloses a tobacco active biological organic-inorganic special fertilizer and a preparation method thereof. The tobacco active biological organic-inorganic special fertilizer is prepared by the following steps of: selecting functional microbial strain and adding the following materials in percentage by weight: 50-70 percent of rapeseed meal, 20-40 percent of sesame seed meal and 10-20 percent of bean meal; mixing, then performing solid fermentation and performing enzymolysis on crude protein in cake meal to form a biological fermentation cake fertilizer with bioactive free amino acid and active small peptide; and then uniformly mixing with an activator and an inorganic fertilizer and chelating to prepare the tobacco active biological organic-inorganic special fertilizer. The tobacco active biological organic-inorganic special fertilizer is characterized by comprising the following raw materials in percentage by weight: 8-12 percent of activator, 20-30 percent of biological fermentation cake fertilizer and 55-75 percent of inorganic fertilizer. According to the invention, a method of combining an organic fertilizer with an inorganic fertilizer and combining nitrate nitrogen with ammonium nitrogen is adopted, the biological fermentation cake fertilizer with the rapeseed meal, sesame seed meal and bean meal as carriers is added, and the raw materials are mixed with the activator and the like to prepare a high-efficiency active fertilizer. The fertilizer has the characteristics of high nutrition, high activity and high efficiency; the tobacco plant root environment can be improved, the root system activity is enhanced, the leaf growth is promoted, the requirements of tobacco plant development on mineral nutrition are fully met, the yield of the tobacco plant and the quality of the tobacco leaf can be obviously improved, the environment pollution is reduced, and the soil is improved.

A process for the treatment of liquid waste biomass, especially liquid manure compositions, wherein the biomass is converted to a fertilizer product. The process at least includes a nitrification step including a first biological conversion stage wherein ammonium is converted to nitrite using nitritifying bacteria in an aerated reactor, and a subsequent chemical oxidation stage wherein nitrite is converted to nitrate by heating the liquid waste biomass in an aerated reactor under acidic conditions. The process is particularly suitable for treating liquid manure, because of the high ammonium nitrogen contents thereof, which render the process essentially self-regulatory. In addition a process for the treatment of liquid waste biomass wherein organic matters are converted to energy sources, referred to as biogas and green cokes, and wherein nitrogen is fixed in a fertilizer product in the form of ammonium nitrate, is provided, the process including the present nitrification process.

The invention relates to a struvite circulating crystallization method for treating synthetic ammonia wastewater. The method comprises the following steps of: A, adding soluble phosphate and magnesium salt into the synthetic ammonia wastewater at the ammonium nitrogen concentration of 1,000-2,065mg / L; B, adding alkali into the acquired struvite solid, and performing pyrolysis at the temperature of between 80 and 100DEG C for 1 to 3 hours; C, treating the synthetic ammonia wastewater by using a pyrolysis solid product, and adding a small amount of magnesium salt, wherein ammonia generated in the pyrolysis process is absorbed by a dilute acid solution, and the obtained ammonium salt is used as a raw material for producing a fertilizer; and D, using struvite which cannot be recycled as a sustained-release fertilizer. For the synthetic ammonia wastewater at the ammonium nitrogen concentration of 1,000-2,065mg / L, the struvite can be recycled for 3 to 6 times, the ammonia nitrogen removal rate is higher than 87 percent, the ammonium nitrogen concentration of effluent is lower than 200mg / L, agents are saved through recycle, and nitrogen resources are recycled. The pretreated wastewater meets the requirement of an A / O biochemical treatment process on nitrogen and phosphorus, and can be subjected to biochemical treatment further.

The invention provides a microbial fertilizer for improving saline alkali soil. The microbial fertilizer comprises the following raw materials in parts by weight: 45-55 parts of turf, 25-35 parts of Angel yeast residues, 5-15 parts of monoammonium phosphate, 5-15 parts of ammonium sulfate and 1-3 parts of a complex microbial inoculant. According to the microbial fertilizer provided by the invention, the microbial flora is in mutual promotion with organic matters and inorganic matters, the components supplement one another, the effective living bacteria count is not less than 50million per gram, the content of the organic matters is not less than 55 percent, the total nutrient is not less than 11 percent, the content of ammonium nitrogen is not less than 4 percent, the content of P2O5 is not less than 4 percent, the content of K2O is not less than 3 percent, and the pH value is 5.5-6.0. Under the co-actions of the components, the effects of rapidly reducing the soil salinity and alkalinity and increasing the content of organic matters, available phosphorus and ammonium nitrogen are achieved, and the conditions that the granular structure of the soil is poor, the soil permeability is reduced and the activity of the microbial flora is inhibited are improved.

The invention discloses an organic-inorganic mixed fertilizer containing alginic acid and a production method thereof. The organic-inorganic mixed fertilizer containing alginic acid comprises the following raw materials in parts by weight: 45-50 parts of carbamide, 18-20 parts of ammonium phosphate, 16-18 parts of potassium sulphate, 6-8 parts of seaweed fermentation residues, 8-10 parts of a seaweed synergist, 6-8 parts of a humic acid synergist, 3-5 parts of an EDTA chelated-state microelement fertilizer, 5-7 parts of plant ash, 3-5 parts of modified magnesia and 0.2-0.3 part of gibberellins. High-quality and high-effect synergist products are added into the technical field of value addition of the fertilizers, so that the high urease inhibition effect is achieved; the conversion from ammonium nitrogen to nitrate nitrogen is controlled; the utilization rate of the fertilizer is increased; the root growth of the crops is facilitated; the content of nutrient in the fertilizer is almost not influenced; the content of nitrogen in the value-added carbamide is not smaller than 30%; the organic-inorganic mixed fertilizer is obvious in synergistic effect and safe and effective in use; organic components are used for increasing the utilization rate of the fertilizer; inorganic components are used for improving the water-retaining property of the fertilizer; the action time of the fertilizer effect is prolonged; the absorption of nutrients in the crops is facilitated; the quality of agricultural products is improved.

The invention relates to the technical field of wastewater treatment, and discloses a pharmaceutical wastewater treatment process which comprises steps: preforming wastewater pre-treatment and comprehensive treatment, pumping wastewater into a coagulation gas floatation clarifier, adding polyaluminum chloride and polyacrylamide in a water input pipeline through a coagulation medicine adding system, then enabling mixed wastewater to enter a three-phase catalytic oxidation tower, a coagulative precipitation tank, a pre-acidification pool, a thermoregulation pool, a UASB reaction pool and a combined type hydrolysis acidification pool sequentially, subjecting the mixed wastewater to hydrolysis acidification, enabling the wastewater to enter a primary A / O pool, a primary precipitation pool, a secondary A / O pool, a secondary precipitation pool, a Fenton oxidation pool and a tertiary precipitation pool sequentially, and discharging standard outlet water from a standard discharging opening. The process has the advantages of stable running effect, high ammonium-nitrogen removal rate, and low running cost, thereby being suitable for treatment of wastewater, which is refractory to degrade, in the pharmaceutical industry.

The invention relates to a formula and a film-coating preparation method for biological carbon coated urea. The biological carbon coated urea is characterized in that the outside of a fertilizer core is coated with solid-powder-shaped biological carbon, sulfur, dicyandiamide and bentonite by using granular urea with a size of 3 to 4 mm as the fertilizer core and oxidized corn starch as bonding liquid, wherein the above-mentioned components have weight proportions as follows: 50 to 80 parts of the urea, 10 to 30 parts of the biological carbon, 2 to 10 parts of the sulfur, 2 to 3 parts of the dicyandiamide, 2 to 3 parts of the bentonite and 3 to 5 parts of the corn starch. The film-coating preparation method for the biological carbon coated urea comprises the following steps: placing the urea into a disc granulator, carrying out preheating with hot air for 5 min, spraying the bonding liquid on the surface of the urea with a high-pressure spray gun, blowing the hot air for 3 to 5 min, adding a mixed film-coating material into the disc granulator in batches and carrying out rotating for 10 min, then spraying the bonding liquid again, and carrying out drying in the air so as to obtain the biological carbon coated urea. According to the invention, the biological carbon can improve physical and chemical properties of soil and adsorb ammonium-nitrogen and nitrate-nitrogen ions; the dicyandiamide reduces nitrification; and S4O62- generated by decomposition of the sulfur can delay decomposition of the dicyandiamide, and H+ and S2O32- generated by decomposition of the sulfur can inhibit nitrification. The biological carbon coated urea provided by the invention has the advantages of low ammonia volatilization, slow generation of nitrate nitrogen, low nitrogen loss and high nitrogen effectiveness.

The invention provides a method for treating high-concentration nitrate waste water and municipal sewage through denitrification anaerobic ammonium oxidation SBR, belonging to the field of sewage biotreatment. The method comprises the following steps: firstly, culturing and acclimating denitrifying bacteria population and anaerobic ammonium oxidation bacteria population which have inadequate denitrification characteristic, then inoculating anaerobic ammonium oxidation sludge and denitrifying sludge with high nitrite accumulation rate in the same reactor, leading nitrate waste water and municipal sewage to flow in denitrification anaerobic ammonium oxidation SBR reactor at a certain ratio, performing anaerobic ammonium oxidation to nitrite accumulated during reduction of nitrite and ammonium nitrogen in the municipal sewage to generate nitrogen gas and synchronously removing. According to the method, nitrate generated during anaerobic ammonium oxidation can be reduced through denitrifying bacteria without the condition of adding a carbon source, the nitrogen removal efficiency of a system can be improved, and the effective route for realizing sewage nitrogen removal with high efficiency and low energy consumption can be provided.

The invention discloses an efficient biological water purifying agent as well as a preparation method and a use method thereof. The water purifying agent is prepared by mixing three components namely microorganisms, a biological enzyme and a flocculating agent. By virtue of the combined effects of the microorganisms, the biological enzyme and the flocculating agent, a significant water body purification effect can be shown, the quality of a water body can be significantly improved, the content of dissolved oxygen in water can be improved, the growth of harmful bacteria can be inhibited, suspended matter and harmful algae in the water can be removed, the content of ammonium nitrogen and nitric nitrogen in the water body can be reduced, the water body can be clarified, foul smell can be eliminated, degradation of pollutants can be promoted, and the ecological benign development of the water can be promoted. The water purifying agent disclosed by the invention has very good purification effects on sewage in agriculture, forestry, animal husbandry and fishery industry, domestic sewage and industrial sewage, and has very important practical significance in environmental protection.

The invention discloses a high-ammonia-nitrogen waste water resource recovery technology. A method used in the technology comprises the following steps of: removing solid impurities from waste water by performing flocculation and solid-liquid separation, treating with a membrane concentrating system to obtain two parts, and performing ammonium-nitrogen oxidation on one part, i.e., purified water through chlorine dioxide for recycling; and adding an alkali into the other part, i.e., a concentrated solution for regulating, performing solid-liquid separation for removing solids, feeding into an ammonia separating tower for removing ammonia, reacting ammonia gas extracted from the ammonia separating tower with formaldehyde in a reaction kettle to generate urotropine serving as a medical intermediate with a high added value, and directly discharging ammonia-removed tower bottom water or discharging after feeding chemicals, removing ammonia and filtering. The method is suitable for ammonia-nitrogen waste water of which the ammonia-nitrogen concentration is over 300 mg / L; treated discharged water can reach a national first class discharge standard; and the ammonia-nitrogen concentration in waste water is higher, the waste water treatment profit is higher.

A method of removing nitrogen, in which the nitrogen is removed from wastewater containing a BOD component and ammonium nitrogen by anaerobic ammonium oxidation, comprising the steps of: distributing the wastewater into two portions which are a nitrification vessel and a denitrification vessel at a predetermined distribution ratio; mixing first treated water which is nitrified by ammonium oxidizing bacteria from ammonia to nitrite in the nitrification vessel, with second treated water which is denitrified by denitrification bacteria in the denitrification vessel; and feeding the mixed water to an anaerobic ammonium oxidation vessel to simultaneously denitrify ammonia and nitrite by ammonium oxidizing bacteria, thereby obtaining a third treated water treated in the anaerobic ammonium oxidation vessel, which is then fed back to the denitrification vessel for denitrification and BOD decomposition.

The invention discloses a long-acting nitrogen-rich rice special organic fertilizer prepared from the following raw materials by weight: 10-16 parts of urea, 1-2 parts of bentonite, 15-20 parts of pig blood powder, 25-35 parts of sweet potato vine, 5-7 parts of fig leaf powder, 12-16 parts of sugar residue, 6-8 parts of distiller's grains, 5-7 parts of calcium superphosphate, 0.1-0.2 part of urease inhibitor, 8-10 parts of coffee slag, 15-20 parts of buffalo milk powder, 5-6 parts of potassium sulfate, 4-5 parts of silicon sulfate, 4-5 parts of potassium dihydrogen phosphate, 20-30 parts of a soil conditioner, and proper amount of water; compared with traditional fertilizers, the use mount of the organic fertilizer is greatly reduced, by addition of the sweet potato vine, the pig blood powder, the buffalo milk powder and other organic matters with rich nutrient elements, soil can be improved effectively improved and fattened, soil organic matter content is increased, the added urease inhibitor slows hydrolysis of tillering stage urea, ammonium nitrogen content in booting stage soil is improved, and the organic fertilizer provides adequate nitrogen fertilizer for later stage growth of rice.

The invention discloses a production method of a readily available and controlled release composite fertilizer containing three nitrogen elements. The production method is as follows: raw materials containing nitric nitrogen, ammonium nitrogen and amido nitrogen are added in materials; in order to prevent that urea reacts with nitro phosphate fertilizer to generate too much urea nitrate and the production can not performed, ammonia gas is introduced in the granulation process according to different proportions to ammonify nitro phosphate fertilizer, reduce the generation of urea nitrate and increase the neutralization degree of monoammonium phosphate; and powdery fundamental fertilizers containing nitrogen, phosphorous and potassium are added to granulate, and then the composite fertilizer can be obtained through drying, cooling, screening and coating. In the production method of the invention, a lot of heat generated in the thermolysis of the nitro phosphate fertilizer and the neutralization heat of the reaction of ammonia gas and monoammonium phosphate are fully utilized to heat materials and increase the granulation temperature; and the viscosity of urea nitrate is utilized, the solubility of ammonium phosphate salt is increased, the quantity of the liquid phase for granulation can be satisfied, higher granulation rate can be realized without using other adhesive, the cost is reduced, the water content of the granulation material is significantly reduced, the drying energy consumption can be reduced and a large amount of energy consumption can be saved.

The invention discloses a green environment-friendly compound fertilizer prepared from three kinds of organic-inorganic nitrogen and a preparation method thereof. By mass percent, humic acid is 25% to 30% of the total amount of raw materials, liquid ammonia is 3% to 5% of the total amount of the raw materials, nitramine phosphorus is 14% to 22% of the total amount of the raw materials, urea is 14% to 22% of the total amount of the raw materials, monoammonium phosphate is 20% to 30% of the total amount of the raw materials, and potassium chloride is 8.5% to 20% of the total amount of the raw materials. The raw materials which contain organic matter, nitrate nitrogen, ammonium nitrogen, amide nitrogen and other phosphorus and potassium elements are added to ingredients. By using the fertilizer, the utilization rate of fertilizer nutrients can be improved, so that the crop yield is increased, the quality is improved, and the harm caused by toxic substances of heavy metals such as cadmium, lead, arsenic, chromium and the like, living grasshopper egg and escherichia coli can be avoided. Additionally, the soil is improved, the soil salinity is reduced, a product contains 2% to 3% of nitrate nitrogen, and the mass ratio of the amide nitrogen to the ammonium nitrogen is 1: (1 to 1.4).

The invention belongs to the fertilizer field and discloses a fertilizer effect enhancement and invalidation control agent and a method for preparing the same. The fertilizer effect enhancement and invalidation control agent comprises a nitrogen stabilizer, a biosurfactant, a biological fermentation compound amino acid, a metal ion chelating agent, a soil structure modifier and water, wherein the nitrogen stabilizer can control nitration decomposition loss of ammonium nitrogen, the biological fermentation compound amino acid can absorb combination ammoniacal nitrogen and reduce volatilization loss, and the metal ion chelating agent can complex high valence metal ions in soil, reduce phosphorus immobilization, and activate phosphorus and potassium fixed in the soil, so that the phosphorus loss is reduced, and the validity of phosphate fertilizers is enhanced. The soil structure modifier can loosen the soil and increase granular structures of the soil, and the biosurfactant can promote nutrient absorption of plants and improve the nutrient utilization. Pot culture and field fertilizer effect experiments show that the fertilizer effect enhancement and invalidation control agent can improve the phosphorus utilization rate apparently, and volumes and incomes of crops are increased.

The invention discloses a method for measuring content of inorganic nitrogen in soil, which comprises the following steps: 1) leaching, namely adding leaching liquor into a soil sample to leach tric nitrogen and ammonium nitrogen in the soil, and filtering to obtain filtered fluid; 2) oxidization, namely adding an oxidizing agent into the filtered fluid obtained in step 1) to oxidize the ammonium nitrogen into tric nitrogen so as to obtain soil total tric nitrogen solution; and 3) performing colorimetric determination with double wavelength on the soil total tric nitrogen solution, and calculating the content of the inorganic nitrogen in the soil according to extinction values obtained by color comparison. The content of inorganic nitrogen in the soil measured by the measuring method has no significant difference with a result measured by a conventional component measurement addition method, and the inorganic nitrogen measured by the measuring method has the recovery rate between 98.8 and 104 percent. The measuring method has the advantages of quickness, accuracy, convenient operation and high efficiency.

The invention discloses a method for preparing a fertilizer-grade ammonium nitrate concentrated solution by use of the mother liquid after immersion tin of a tin-stripping waste liquid of a circuit board. The method is characterized by comprising the following successive steps of: neutralizing and precipitating the tin compound of the nitric acid type tin-stripping waste liquid by ammonia water, and removing the trace amount of copper-ammonia complex ions and organic acid stannum complex ions of the weak-acid filtering stock by a chelate ion exchange resin column in an ion exchange adsorption mode; adding powdery or granular active carbon into the processed filtering stock while stirring, wherein the added active carbon is 0.1-1% of the filtering stock by weight; and performing evaporation concentration of the ammonium nitrate solution after impurity removal according to the conventional technology, and controlling the sum of ammonium nitrogen and nitrate nitrogen to 100-200g nitrogen per liter to obtain the fertilizer-grade ammonium nitrate concentrated solution. Based on the existing ammonia water neutralizing method for processing the tin-stripping waste liquid, the invention provides a method for preparing the fertilizer-grade ammonium nitrate concentrated solution with a simple technology, large processing amount and low cost for the remaining ammonium nitrate waste liquid; and the prepared fertilizer-grade ammonium nitrate concentrated solution can be used for producing a compound fertilizer, an organic-inorganic compound fertilizer or a liquid humic acid-containing water-soluble fertilizer in a large scale.

A nitrification carrier having made nitrifying bacteria dominant therein and a denitrification carrier having made anaerobic ammonium-oxidizing bacteria dominant therein are mixed in a treatment tank. Both of a nitrification reaction with the nitrification carrier and a denitrification reaction with denitrification carrier are allowed to proceed in the treatment tank to decompose ammonium nitrogen in wastewater to nitrogen gas. The ratio of the bacterial loads of the nitrifying bacteria and the anaerobic ammonium-oxidizing bacteria can be easily controlled by immobilizing the nitrifying bacteria and the anaerobic ammonium-oxidizing bacteria on different carriers from each other (nitrification carrier and denitrification carrier) and by controlling the volume ratio (ratio of the feeding amounts) of the nitrification carrier and the denitrification carrier.

The invention discloses water-soluble compound fertilizer synergist. The water-soluble compound fertilizer synergist is fine gel particle formed by polymerizing an inorganic substrate, carboxylic acid and an amide material and comprises the following components in parts by weight: 50-60 parts of inorganic substrate, 25-30 parts of carboxylic acid, 5-15 parts of amide material, 3-5 parts of catalyst, 1-3 parts of tackifier and 0.5-1 part of amino acid compound. The synergist is formed through gel-type inorganic substrate material acidification, amide polymerization and fine coating; the fine gel particle can be rapidly dispersed in water; the synergist has the efficacy of chelate adsorption, is capable of enriching and adsorbing various fertilizer nutrients and has the effects of adsorbing and collecting ammonia, ammonium nitrogen, nitrate, soluble phosphorus and potassium ions; the synergist is attached to roots of plants and has the advantages of providing a local microcirculation system, promoting the nutrient absorption of the plants, preventing the nutrient loss, avoiding the defects that N element is easy to volatilize, P element is easy to fix and K element is easy to leak at the same time and improving the effect of water-soluble compound fertilizers by a large margin.

The invention discloses a quick-acting slow-released compound fertilizer and a preparation method thereof. The preparation method comprises the following steps of: adding a raw material containing nitrate nitrogen, ammonium nitrogen and amidonitrogen to materials, directly introducing gas ammonia to a material layer of a rotor drum granulator to finish ammoniation of ammonium nitrate phosphorus, and controlling the mass of urea nitrate generated by reaction. According to effective proportioning, the contents of nitrogen in the quick-acting slow-released compound fertilizer are as follows in percentage by mass: 2-5 percent of nitrate nitrogen, 6-9 percent of ammonium nitrogen and 7-11 percent of amidonitrogen. The phosphorous and potassium nutrient content is determined according to proportioning of different products. The ammonium nitrate phosphorus, containing the nitrate nitrogen, as the raw material is added by in two parts, i.e., the ammonium nitrate phosphorus containing 1-3 percent of nitrate nitrogen is added into the material layer, and the rest of ammonium nitrate phosphorus containing 1-2 percent of nitrate nitrogen is added into a part which is 1-1.5m away from the inlet of a cooler; and the surfaces of fertilizer particles subjected to drying and fine screening are wrapped, so that the quick-acting slow-released compound fertilizer has available nitrogen shells. The slow-released nitrogen urea is added in a solid manner, used as master batch for granulation and wrapped layer by layer by other material layers of nutrients, so that the quick-acting slow-released compound fertilizer has slow-released kernels.

The invention belongs to the field of fertilizers and discloses a synergistic loss-control agent of nitrogenous fertilizers and a production method thereof. The synergistic loss-control agent is composed of a nitrogen stabilizer, a bio-surfactant, biological fermentation compound amino acid, a plant growth regulator, a soil structure modifier and water, wherein the nitrogen stabilizer can control nitration, decomposition and loss of ammonium nitrogen; the biological fermentation compound amino acid can absorb and chemically combine the ammonium nitrogen and reduce volatilization loss; plant growth regulator, the plant growth regulator can regulate plant growth and promote plants to absorb nitrogen, phosphor, potassium and microelements; the soil structure modifier can loosen soil and add granular structures of the soil; and the bio-surfactant can promote the plants to absorb nutrients and improve the utilization rate of the nutrients, therefore loss of phosphate is reduced, and effectiveness of the phosphate fertilizers is improved. Potting and field fertilizer efficiency tests show that the utilization rate of the phosphate can be improved obviously and the yield of crops and income can be increased through the synergistic loss-control agent.

In treating water containing ammonium-nitrogen by a combination of a nitrification process and autotrophic denitrification bacteria, high efficiency denitrification treatment is achieved by providing adequate ratio between nitrite and ammonia in effluent of the nitrification process. Ammonium-nitrogen concentration of the raw water introduced to a nitrification reactor 1 and the ammonium-nitrogen concentration of the nitrified liquid from the nitrification reactor 1 is measured by NH4—N concentration measuring apparatuses 4, 5 and, on the basis of the measurement results, the flow volume for aeration by a blower 3 would be controlled by a blower controller 6. From the difference in NH4—N concentration between the influent and the effluent of the nitrification reactor 1, the nitrite concentration A in the nitrified liquid is calculated, and the ratio A / B of the nitrite concentration A with the ammonia concentration B in the nitrified liquid is calculated in the controller 6. The flow volume for aeration by the blower 3 to the nitrification reactor 1 is controlled such that the value of the A / B becomes 1.1 or more, preferably from 1.1 to 2.0, more preferably from 1.2 to 1.5, especially preferably from 1.3 to 1.4.

The invention relates to a high-activity nitrification inhibition type multifunction fertilizer synergist and is applicable to the field of agriculture and forestry. The high-activity nitrification inhibition type multifunction fertilizer synergist is composed of following raw materials of, by weight, 3-35% of vitamin C, 3-35% of N-acyl sodium glutamate, 3-35% of 3,4-dimethylpyrazole phosphate (DMPP), 3-35% of farm-oriented rare earth, 5-35% of fulvic acid, 0.5-2.5% of compound sodium nitrophenolate, 15-45% of vermiculite and 15-45% of medical stones. The raw materials are smashed, screened by a 30-100 mesh screen, then stirred and mixed according to a certain ratio to obtain the fertilizer synergist. The fertilizer synergist is applicable to slow-acting nitrogen fertilizers or composite nitrogen fertilizers which use ammonium nitrogen fertilizers or urea as raw materials and is capable of being matched with the ammonium nitrogen fertilizers or the urea to be simultaneously applied to various types of soil, the fertilizer efficiency period of nitrogen fertilizers with the added multifunction fertilizer synergist can be prolonged to 90-110 days, abilities of drought resistance and disease resistance can be obviously improved, soil microorganism activities and crop root system activities can be stimulated, effectiveness and utilization efficiencies of soil fertilizers can be improved, and residual effects on crops are obvious.

A process and apparatus for treating an aqueous nitrogeneous liquor by performing ammonia oxidation and denitrification using a biosludge comprising anammox bacteria and ammonia-oxidizing bacteria, which process and apparatus can serve to obtain treated liquor of high water quality at a high treating efficiency and a high yield of ammonium nitrogen removal with easy control of supply rate of oxygen-containing gas. The technique comprises the steps of charging a reaction vessel having stored therein a biosludge comprising anammox bacteria and ammonia-oxidizing bacteria present as a suspension with a definite amount of the liquor to be treated, supplying thereto an oxygen-containing gas at a rate not obstructing growth of the anammox bacteria to thereby cause ammonia oxidation of ammonium nitrogen into nitrite nitrogen by the ammonia-oxidizing bacteria and denitrification by the anammox bacteria simultaneously, or performing the denitrification in steps by charging the reaction vessel with a part amount of one treating batch of the liquor to be treated, whereupon supply of the oxygen-containing gas is stopped and the reaction liquor is replenished with the rest amount of the liquor to be treated. The supply of the oxygen-containing gas is stopped at a point of time at which the observed value of dissolved oxygen concentration or of ORP of the reaction liquor in the reaction vessel changes abruptly.

The object of the present invention is to provide an electrolytic treatment method and device for wastewater containing ammoniacal nitrogen, which can prevent the reduction of current efficiency and improve the decomposition efficiency of ammonia, and can safely and effectively treat all wastewater containing nitrogen . The electrolytic treatment device of the present invention is an electrolytic treatment device for wastewater containing ammoniacal nitrogen with the following parts: an adjustment tank (11) into which the wastewater containing ammoniacal nitrogen flows, and the electrolytic treatment is supplied by the adjustment tank under the condition of having chloride ions. The electrolytic cell (12) of the waste water (20), and the circulating pump (13) that makes the waste water circulate in the above-mentioned adjustment tank (11) and the above-mentioned electrolytic cell (12); wherein the above-mentioned electrolytic cell (12) has a pH value of 5 For electrolytic treatment of the above-mentioned waste water in the range above and less than 8, it is preferable to arrange a catalyst member formed of a metal material in the above-mentioned electrolytic cell (12) to promote the decomposition reaction of ammoniacal nitrogen.

The invention discloses a novel Nyquist reagent and a method using the reagent for rapidly determining soil ammonium. The main improvement of the novel Nyquist reagent lies in that proper amount of solid potassium hydroxide or sodium hydroxide is directly added in solution after the complete reaction of potassium iodide and mercuric chloride during the preparation; the novel Nyquist reagent is used for determining the soil ammonium; tartaric acid potassium sodium alkaline solution is used as masking agent, the novel Nyquist reagent is added in Arabic gum medium solution for the color reaction with ammonium ions. Alkaline is added for adjusting the alkalinity of a color reaction system for the colorimetric determination after the color is stable. The Nyquist reagent has the advantages of wide linear range, long shelf life, color stability and easy preparation. The determination method of the invention has the advantages of easy operation, good reproducibility, small error and rapid test speed and is applied to bases and agricultural extension departments.

The invention discloses a blue alga compost and its making method. The making method of the blue alga compost comprises the following steps: mixing blue algae with biomass charcoal to obtain a blue alga-biomass charcoal mixture, and carrying out aerobic composting of the blue alga-biomass charcoal mixture in a constant-temperature and constant-humidity incubator to obtain the blue alga compost. The making method of the blue alga compost reduces the loss of ammonium nitrogen and total nitrogen in the blue alga compost composting process, allows the nutrient contents after composting ending to reach an organic fertilizer standard, reduces the contents of toxins in the blue algae, and improves the seed germination index of a mixed compost. The method has the advantages of simplicity, practicality, safety, environmental protection and substantial effects.