66results about How to "Inhibit nitrification" patented technology

The invention discloses an organic fertilizer for improving saline-alkali soil and a preparation method of the organic fertilizer. The organic fertilizer for improving the saline-alkali soil comprisesthe following ingredients in parts by weight: 30-38 parts of animal waste, 10-16 parts of plant straw, 8-12 parts of desulfurized gypsum, 6-10 parts of pulverized fuel ash, 5-7 parts of tea fluff, 4-6 parts of bagasse, 3-5 parts of waste tobacco material, 3-5 parts of seaweed meal, 2-4 parts of a pH regulator, 2-4 parts of mineral powder, and 1-3 parts of a deodorant and further comprises 1-3 parts by weight of a microbial agent and 0.01-0.03 part by weight of rooting powder. The organic fertilizer is prepared by granulating the animal waste, the plant straw, the desulfurized gypsum, the pulverized fuel ash, the tea fluff, the bagasse, the waste tobacco material, the seaweed meal, the pH regulator, the mineral powder, the deodorant, the microbial agent and the rooting powder. The organicfertilizer can effectively improve a soil structure of the saline-alkali soil and soil fertility, and reduce salinity and alkalinity; and when the organic fertilizer is matched with plant cultivation,the organic fertilizer further improves the water retaining capacity of the soil, avoids accumulation of salt in the surface soil, and can persistently and effectively improve the saline-alkali soiland change wasteland into fertile farmland after several cycles.

The invention provides a preparing and application method of an Arundo donax biological charcoal serving as a nitrogenous fertilizer synergist. The preparing and application method comprises the steps of: harvesting mature-stage Arundo donax, shearing into small segments of 2-5cm, and air-drying for later use; heating the Arundo donax segments to 350-650 DEG C at a heating rate of 1-20 DEG C/min under the protection of inert gas at a flow rate of 200-500mL/min for charring for 1-6h; after charring is finished, cooling to room temperature under the protection of inert gas; crushing prepared biological charcoal into particles of 1-5mm, sealing, and storing in a drying place for later use; and applying the crushed biological charcoal to agricultural soil at a ratio of 0.1-8%, and sufficiently mixing to be uniform, wherein the soil moisture content is kept at 60-80%. The preparing and application method is simple in operation, low in cost and significant in effect, and is suitable for the situation of China; and by using the method, the nitrogenous fertilizer absorption of the crop is promoted, the nitrogenous fertilizer loss is reduced and the nitrogenous fertilizer utilization efficiency of the crop is improved.

The present invention provides a biological treatment device and method for preventing separation membrane pollution when biological treatment of organic matter-containing water and raw water for producing pure water. Anaerobic sludge containing methanogenic bacteria group is held in a reactor (110). Organic matter-containing water containing monomer organic matter (tetramethyl ammonium hydroxide) as main substance capable of being decomposed by methanogenic bacteria group biology as water to be treated is supplied to the reactor (110) from a raw water pipe (130), and is carried out with anaerobic treatment by methanogenic bacteria group. The treatment liquid obtained with the anaerobic biological treatment is carried out solid-liquid separation by using a membrane separation device (112)arranged outside the reactor (110), and separation water without condensate is obtained. The separation water is carried out desalination treatment with reverse osmosis membrane device (114) to become raw material for producing pure water.

The invention discloses a preparation method of synergistic nitrogen fertilizer. The alginic acid used by the product is prepared from algae used as raw material through enzymolysis and is effectively compounded with nitrogen for granulation. The synergistic nitrogen fertilizer has sustained and controlled release effect, the utilization rate of nitrogen fertilizer can be significantly improved, the application amount of nitrogen fertilizer can be reduced, and the production cost of peasants can be greatly reduced. The synergistic nitrogen fertilizer conforms to the national organic agriculture, food security and other industrial policies. The utilization rate of the synergistic nitrogen fertilizer is 12-25% higher than the common nitrogen fertilizer. The content of the alginic acid serving as the nitrogen fertilizer synergist in the product accounts for 0.3-20%, and the content of the nitrogen accounts for 10-46%. The synergistic nitrogen fertilize can be widely applied to various cash crops such as field crops, fruits, vegetables and the like and can effectively improve the crop quality and increase the crop yield.

The invention provides a method for matching and applying a nitrification inhibitor and biomass carbon to improve a nitrogen fertilizer utilization rate and an application thereof. The method is characterized by comprising the following steps of: smoldering crop straws to prepare the biomass carbon; and mixing dicyandiamide and the biomass carbon and applying the mixture into soil; and adding an ammonium nitrogen fertilizer. When the application amount of an ammonium state or an amide state is 200-400 mgN per kg of soil, the utilization amount of the dicyandiamide is 5-50 mg/kg and the utilization amount of the biomass carbon is 50 g per kg of the soil. The method comprises the following specific application steps of: mixing the biomass carbon and the dicyandiamide and applying the mixture on surface-layer soil to be sufficiently mixed with the soil; and then, applying a chemical nitrogen fertilizer according to a conventional method. The method utilizes the characteristic that the biomass carbon has the very strong adsorption capability on the nitrification inhibitor and the dicyandiamide; before a chemical fertilizer is applied, the biomass carbon and the dicyandiamide are mixed and applied into the soil; and the keeping time of the dicyandiamide in the soil is improved and the inhibition effect of a nitration reaction of converting ammonium nitrogen to nitrate nitrogen is prolonged, so that the leaching loss of nitrogen is reduced and the nitrogen fertilizer utilization rate is improved.

The invention relates to a soil fertilization method by directly returning straws to field. The specific operation steps comprise: 1, in a crop harvesting season, using a harvester to harvest straws and crops, reserving low stubbles, collecting crop straws; 2, concentrating crop straws collected in one mu field in 1/2 to 1/5 mu cultivated land, uniformly laying the straws, spreading lime nitrogen, performing rotary tillage, mixing the crop straws with surface soil, performing rotary tillage twice; fallowing the treated cultivated land for one month, planting crops normally on cultivated land which is not treated; 3, performing second rotary tillage, decomposition and conversion speed of the straws greatly accelerating; 4, fallowing the cultivated land for a crop growing season, the straws fully decomposing and converting into organic materials in the soil and releasing inorganic nutrients, to obtain a fallow field. Straw residual bodies cannot be seen in the soil in the fallow field, and organic material content in the surface soil of the fallow field is improved by more than 8%, soil total nitrogen content is improved by more than 5%, soil alkali-hydrolyzable nitrogen content is improved by more than 5%, and rapidly available potassium content is improved by more than 10%.

The invention discloses a synergetic purification method and a synergetic purification device for SO2 and heavy metals in smelting flue gas and belongs to the technical field of atmospheric pollution. The synergetic purification method comprises the steps of absorbing and purifying the SO2 and the heavy metals (such as Hg, As, Pb, Cd and Zn) through (NH4)2S solution serving as an absorbent; feeding the smelting flue gas subjected to dust removal into a second-level ammonium sulfide solution absorption tower so as to enable the absorbent to absorb and purify the SO2 and the heavy metals in the gas, wherein the heavy metals are settled down in the form of solid sulfide and are recycled after being filtered, and the SO2 is converted into NH4HSO3 and (NH4)2S2O3 which are retained in absorption liquid; after the absorption reaction is terminated, neutralizing, oxidizing and evaporatively crystallizing the absorption liquid to obtain (NH4)2SO4 and (NH4)2S2O3 solid mixtures which can be directly sold as fertilizers. The technology is simple and is easy to operate; the desulfuration efficiency is high, the cost is low, and the synergetic purification method is suitable for industrial application.

The present invention relates to a one-off mealie composite fertilizer and the corresponding produce process, which comprises a nitrogen nutrient with 26 percent molar percent, a phosphor nutrient with 10 percent molar percent calculated by P2O5 and a kalium nutrient with 12 percent molar percent calculated by K2O. The fertilizer is characterized in that: the fertilizer also comprises a nitrogenous fertilizer additive with 0.2 percent molar percent. The nitrogenous fertilizer additive in the one-off mealie composite fertilizer can restrict the hydrolyzing for carbamide nitrogen in the fertilizer; the fertilizer releases slowly. So the effect is to decrease the losing of nitrogen element, to protect the environment and to enhance the utilization ratio of the nitrogen element.

The invention relates to an allylthiourea modified konjac glucomannan (KGM) copolymer coating material and a slow-release nitrogen fertilizer. The method comprises a preparation method of the coating mainly made of the modified KGM copolymer and a preparation method of the coated slow-release fertilizer. The optimization conditions of super-absorbent property, fertilizer-keeping property, soil nitrification resistance and the preparation technology and parameters of the slow-release fertilizer can be obtained, and the problem of evaluating the slow-release effect of the coating can be solved. The preparation technology of the coated slow-release fertilizer is simple, the fertilizer is cheap; when the coated slow-release fertilizer is prepared, the coating material can be used as both a coating agent and an adhesive; the water-absorbing property and fertilizer-keeping property of the coating material are respectively increased to 600 times and 350 times as compared with those of konjaku flour, thus the slow-release effect is obviously increased; and the coating material can be completely degraded, no eco-environmental risk is caused, the chemical fertilizer can be utilized to the greatest extent and the pollutions of the chemical fertilizer to the agroecological environment can be reduced.

The invention discloses organic fertilizer for saline and alkaline land transformation as well as a preparation method thereof. The organic fertilizer for saline and alkaline land comprises 42 to 48 parts by weight of animal waste, 12 to 14 parts of plant straws, 10 to 12 parts of tea powder, 8 to 10 parts of bagasse, 6 to 8 parts of seaweed powder, 4 to 8 parts of a pH regulator, 4 to 6 parts ofan adsorbent and 3 to 5 parts of a loosening agent, and also comprises 1 to 3 parts by weight of microbial agent and 0.01 to 0.03 part by weight of rooting powder. The animal waste, the plant straws,the tea powder, the bagasse and the seaweed powder are subjected to composting treatment, the pH regulator, the adsorbent, the loosening agent, the microbial agent and the rooting powder are added, and pelletizing is performed to prepare the organic fertilizer. The organic fertilizer can effectively improve the soil structure of the saline and the alkaline land, improve the soil fertility and reduce the salinity and alkalinity, cooperates with plant cultivation to improve the water-retaining property of the soil and prevent salt return, can improve the saline and the alkaline land durably andeffectively, and can change the desolate beach into the fertile land after being circulated for many times.

The present invention relates to a pesticide for controlling mustard disease. Said pesticide composition includes (by wt%) 15-70% of calcium cyanamide and 10-75% of calcium oxide, and the rest is impurity. Said invention also provides its application method and concrete steps.

The invention discloses an environment-friendly fertilizer for okra and a production method thereof. The fertilizer is prepared from the following raw materials in parts by weight: 300 parts of large-grained urea, 200 parts of large-grained monoammonium phosphate, 300 parts of large-grained potassium chloride, 100 parts of granular lime nitrogen, 80 parts of pepper seeds, 10 parts of anise seeds and 10 parts of black pepper seeds. The production method comprises the following steps: radiating the pepper seeds, the anise seeds and the black pepper seeds to inactive, evenly mixing the radiated mixture with other raw materials, screening and packaging to acquire the fertilizer. The fertilizer is an improvement of the lime nitrogen; the effective period of the lime nitrogen is increased from about 15 days to about 80 days, and the effect of the lime nitrogen is intensively released in a flowering stage, so that the effectiveness period of the lime nitrogen is greatly increased. By virtue of the combination of the lime nitrogen, the anise seeds and the black pepper seeds, diseases and insect pests in soil are remarkably reduced, the loss of okra in a seedling stage is greatly decreased, and the index of diseases such as epidemic diseases and viral diseases is greatly reduced.

The invention relates to a recirculating prawn aquaculture method in combination with a nitrification-assimilation effect and belongs to the technical field of aquaculture. A culture system used in the method comprises a culture pond, a microfilter, a water circulating pump, a biofilter, an ultraviolet sterilization device and a Roots blower; when the culture system is utilized for culture, browngranulated sugar 40-50% of the bait feeding amount or molasses 50-60% of the bait feeding amount is added into the culture pond every day to promote growth of heterotrophic bacteria, and part of metabolic waste is removed by utilizing the bacterial assimilation effect. According to the method, in the circulating water culture system with nitrification as a water treatment core, a carbon source iscontinuously increased in the culture process, growth of the rhodobacteriaceae bacteria in a culture water body is promoted, the bacterial assimilation effect is strengthened, meanwhile, the nitrification effect of nitrification bacteria is not inhibited, the assimilation effect and the nitrification effect jointly purify the water body, the microbial water treatment efficiency is improved, the load of a water treatment system is reduced, and a culture water environment is improved.

The invention belongs to the field of environmental microorganisms and particularly relates to a thiourea degrading strain and a method for treating thiourea-containing wastewater by applying the same. The strain belongs to bacillus cereus and is preserved in the China Microbial Culture Collection Management Center, with a preservation number of CGMCC No.16152. The strain is applied to an aerobicbiochemical system of the thiourea-containing wastewater and can completely degrade thiourea and discharge ammonia nitrogen reaching standard; the situations that secondary pollution is caused by chemical treatment, and the wastewater discharge is unlikely to reach the standard are avoided. When being utilized for treating the thiourea-containing wastewater, the strain has the advantages of beinghigh in tolerance load, low in cost, good in treatment effect, stable in effluent quality and simple and convenient to operate and manage.

The invention discloses a method for planting figs and improving soil fertility condition in a saline-alkali land. The method comprises the following steps: application of an organic fertilizer used for improvement of the saline-alkali land for land preparation, propagation, sowing, field management and timely harvesting, wherein the organic fertilizer used for improvement of the saline-alkali land comprises the following components in parts by weight: 42 to 48 parts of animal manure, 12 to 14 parts of plant straw, 10 to 12 parts of tea dust, 8 to 10 parts of bagasse, 6 to 8 parts of seaweed meal, 4 to 8 parts of a pH value regulator, 4 to 6 parts of an adsorbent and 3 to 5 parts of a bulking agent; and the organic fertilizer also comprises 1 to 3 parts by weight of a microbial agent and 0.01 to 0.03 part by weight of rooting powder. The method provided by the invention improves the saline-alkali land by adopting the measures of applying the organic fertilizer used for improvement of the saline-alkali land, planting figs, etc.; the figs have high survival rate and high yield; the improvement effect to the whole saline-alkali land is prominent; and the improvement process is green,environment-friendly and pollution-free. Thus, the method provided by the invention is an application technology which is worthy of large-area popularization.

The invention relates to a special fertilizer for preparing granular rice from sandy raw materials and a preparation method and application of the special fertilizer. A calcium-magnesium-phosphate fertilizer, ammonium chloride and a granulating agent are mixed in the weight ratio of (30-70):(30-70):(1-10); the mixture is added into a granulator for granulation, then the granulated particle material is transferred into a drying machine for drying, the dried particle material is transferred into a cooling screening machine for cooling and screening, and the special fertilizer is obtained. Compared with the prior art, the calcium-magnesium-phosphate fertilizer and the ammonium chloride are put together, and a small quantity of granulating agent is added, so that granulation is easy, nutritional requirements of paddy rice are met, and the use quantity of other chemical fertilizers can be replaced and reduced.

The invention discloses a rapid startup device and method for normal-temperature shortcut nitrification of urban sewage with low C/N ratio. The device comprises an SBR (sequencing batch reactor), wherein an aeration device, a DO sensor, a stirring device and a pH sensor are arranged in the SBR; the SBR is connected with a water inlet pump and a water outlet pump through pipes; a sludge discharge pipe is arranged at the bottom of the SBR. Meanwhile, the rapid startup method for normal-temperature shortcut nitrification of the urban sewage with the low C/N ratio is disclosed and comprises the following steps: (1) inoculation; (2) sewage feeding; (3) aeration; (4) standing for discharging; (5) repeated treatment; (6) pH shock. Growth of AOB can be promoted better, nitrification is inhibited,energy consumption of a reaction device can be reduced effectively, startup period for shortcut nitrification is shortened, and rapid startup for shortcut nitrification of domestic sewage with low ammonia nitrogen content can be realized.

The invention relates to a synergistic mixture of urease inhibitors and nitrification inhibitors for treating fertilisers containing urea, particularly having an improved urease-inhibiting effect, tothe use of same, and to fertilisers which contain urea as well as said mixture.

The invention belongs to a method for efficiently treating coal gasification wastewater in a biochemical mode. Specifically, a logical sequence of units in a conventional A2O2 process is re-arranged according to pollutant removal characteristics; reaction conditions are improved, removal efficiency, on a respective specific pollutant, of each unit is improved, efficient removal of the pollutants in wastewater is realized by a system, and water quality of outlet water is improved.