43results about How to "Raise the initial concentration" patented technology

The invention discloses a low-temperature cultivation algal-bacterial symbiotic granular sludge method. The method comprises the steps that activated sludge subjected to acclimation or mature aerobicgranular sludge is inoculated to a gas stripping type batch reactor, algae fluid is fed into the reactor, stuffy aeration is carried out for 3 days to 7 days after the algae fluid is fed, the reactorreceives light and aeration during the process of stuffy aeration without drainage, and nutrients are fed into the reactor every four hours to eight hours, and after stuffy aeration is finished, the reactor runs according to the process including low-speed water inlet, aeration, sedimentation and drainage with the cycle ranging from 4 hours to 8 hours; and the process mentioned above is carried out on the condition that the indoor temperature ranges from 9 DEG C to 15 DEG C, and when the inoculated sludge is the aerobic granular sludge, the reactor runs for 3 days to 10 days according to the cycle to generate green or brown algal-bacterial symbiotic granules. The algal-bacterial symbiotic granules cultivated with the low-temperature cultivation algal-bacterial symbiotic granular sludge method has the advantages of being capable of resisting the low-temperature environment, high in treatment efficiency, good in sedimentation performance and the like, and the method is an efficient, economic and environment-friendly sewage treatment strategy, and thereby having the good application prospect and great significance.

The invention discloses high-purity ultrafine oxalate ferromanganese of which the purity is greater than 99.6%, the median particle diameter is 0.5-4.0 microns and the metal proportion is adjustable, and a preparation method of the high-purity ultrafine oxalate ferromanganese, and belongs to the technical field of inorganic fine chemical engineering. According to the main points of the technical scheme, under inert gas protection, a ferrous salt and a manganous salt are dissolved into deionized water at a certain molar ratio; the mixed solution and a solid oxalic acid or oxalate are directly subjected to co-precipitation reaction under the common action of mechanical stirring and ultrasonic cavitation; and filtering, multiple ultrasonic laundering and drying are sequentially carried out on a generated oxalate ferromanganese suspension to obtain oxalate ferromanganese powder. The oxalate ferromanganese product obtained by the method has the advantages that the purity is high, metal ions are evenly distributed, the powder granularity is controllable, the distribution range is narrow, the technology is simple, the cost is relatively low and industrial mass production is easy to implement.

The invention discloses a method for improving the washing efficiency of tail gas during wet process phosphoric acid production, and relates to tail gas treatment in wet process phosphoric acid production. The method comprises the following steps: firstly, sealing a reaction tank, that is, completely insulating the inside of a reaction digesting chamber from the outside thereof by adding oil sealonto stirring equipment of the reaction tank and sealing a service port cover board; secondly, washing tail gas through first class Venturi and third class hollow-spraying-tower in a counter current washing manner, the Venturi and a first washing tower require a small quantity of water to accomplish washing, and cleaning solution is reserved for a phosphoric acid concentration fluorine absorptionsystem, while for second class and third class washing, a large quantity of water is required, cleaning solution is sent back to a phosphoric acid reaction system and consumed to guarantee the washing efficiency. When the method is applied in the negative pressure operation of the reaction digesting chamber, air outside the chamber cannot enter the reaction digesting chamber through the gap between the equipment and the reaction chamber, so that the volume of tail gas is greatly reduced, the concentration of fluoride in tail gas is increased, and the washing efficiency is improved. As washingis more frequently carried out, the concentration of the cleaning solution is increased, so that the recycling of the cleaning solution can be facilitated.

The invention discloses a method for efficiently extracting high-quality nucleic acid substances from olive leaves. The operation steps mainly include sampling, grinding, pyrolysis, impurity removal,precipitation, purification, dissolution and the like. Aiming at the characteristics that the olive is rich in impurities such as polyphenols, polysaccharides and proteins, on the basis of a traditional CTAB method, deep optimization is carried out on the characteristics of olive leaves, systematic improvement is carried out on sample dosage, reagent types, reagent concentration, reaction time, reaction volume, operation steps and the like, and a method suitable for high-efficiency and high-quality extraction of nucleic acid substances of olive tender leaves, mature leaves or old leaves is developed. The method can select and extract olive leaf genome DNA or total RNA according to actual requirements, has wide applicability and strong practicability, and has good application value.

The invention discloses a crop phosphate fertilizer application technology for improving phosphate fertilizer utilization rate, belongs to the field of agricultural fertilizer application, and specifically relates to the crop phosphate fertilizer application technology for improving phosphate fertilizer in-season utilization rate. The crop phosphate fertilizer application technology is characterized in that, soil available phosphorus is fully used, maintenance time of high concentration available phosphorus can be reduced, fixation is reduced, the loss is reduced, maximum supply in fertilizer required period is ensured, and the in-season utilization rate is improved. In middle and high fertility farmlands, especially in farmlands with the soil available phosphorus being more than 30mg / kg, a phosphate fertilizer is not applied in seedling stage, seedlings are only allowed to absorb soil available phosphorus, 30 to 150 kg per hectare of phosphate fertilizer (P2O5) is applied in early flower bud differentiation stage, and the theoretical concentration of the available phosphorus in a plough layer can be improved by 80-300% compared with original initial concentration. In middle and low fertility farmlands, especially in farmlands with the soil available phosphorus being lower than 10mg / kg, the phosphate fertilizer is applied in two times; 15-75 kg per hectare of base fertilizer (P2O5) is applied, 15-75 kg of the fertilizer (P2O5) is applied in early flower bud differentiation stage, and the theoretical concentration of the available phosphorus in the plough layer soil can be improved by 80-300% compared with the original initial concentration in the two times of fertilizer application.

The invention provides a composite carrier containing activated carbon and a preparation method of the composite carrier. The composite carrier comprises activated carbon, silica-alumina clay, a 4A molecular sieve and a bonding component. A precursor of the composite carrier is particles prepared from activated carbon, silica-alumina clay, an inorganic binder and alkali-soluble fiber short shreds, and the particles are subjected to hydrothermal treatment with alkali liquor to prepare the composite carrier of which the surface of an outer layer is rich in a 4A molecular sieve generated by in-situ crystal transformation of the silica-alumina clay and hydroxylated activated carbon. The composite carrier is stable in structure, high in adsorption capacity and high in deep removal capacity of organic pollutants.

The invention discloses a system and a method for improving the trapping economy of CO2 in flue gas of a coal-fired boiler. The system is based on a rotary CO2 adsorption and desorption device, and mainly comprises a dust remover, a flue gas heater, the rotary CO2 adsorption and desorption device, a desulfurization tower, a flue gas conditioning device, a solution absorption method carbon capture device and a chimney. According to the invention, the CO2 concentration of the flue gas entering the solution absorption method carbon capture system is increased by using the rotary carbon dioxide adsorption and desorption device. According to the method, the initial concentration of the CO2 in the flue gas entering the solution absorption process carbon capture device can be increased under the condition of lower energy consumption, so that the energy consumption of a solution absorption method carbon capture system or the volume of the solution absorption method carbon capture system can be greatly reduced, and finally, the carbon dioxide capture cost of a coal-fired boiler is greatly reduced; the carbon capture economy of the system is effectively improved.

The invention relates to the technical field of wastewater treatment and particularly discloses a method for treating wastewater by ozone catalytic wet oxidation. The method comprises the following steps: enabling organic wastewater and ozone to enter a reactor for reaction, wherein the reactor is filled with a catalyst A and a catalyst B in sequence according to a contact sequence with organic wastewater, the catalyst A is a transition metal or precious metal supported catalyst, the catalyst B comprises a composite carrier and an active metal component, and the composite carrier comprises active carbon and basic carbonate. The method provided by the invention not only has high COD removal capacity, but also can improve the effective utilization rate of ozone and reduce the addition amountof ozone.

The invention discloses a method for recovering sodium carbonate from a sodium tungstate leaching solution, andbelongs to the field of resource recycling.Aiming at a feature that a concentration of WO3 in the sodium tungstate leaching solution is lower generally, the method comprises the following steps of: firstly, concentrating the sodium tungstate leaching solution, improving an initial concentration of Na2CO3 in the solution as much as possible to improve a crystallization rate of the sodium carbonate in a freezing crystallization process, and simultaneously ensuring a proper initial concentration of WO3 to prevent the sodium tungstate from crystallizing together with the sodium carbonate.By the adoption of the method for recovering the sodium carbonate from the sodium tungstate leaching solution,a direct freezing crystallization method is combined with an NaHCO3 crystallization method, most of sodium carbonate crystal are recovered by the direct freezing crystallization method, thereby reducing the consumption of subsequently-injected CO2 and neutralization time of ventilation, meanwhile, further improving a total recovery rate of the sodium carbonate through the NaHCO3 crystallization method, and covering the shortage of low recovery rate of the direct freezing crystallization method; and aiming at the feature that temperature-lowering is slow in a later period in a cooling and temperature-lowering process, crushed ice blocks are directly added to dissolve and rapidly lower the temperature, thereby greatly improving the productioneffectiveness.

The invention discloses a novel composite carrier enhanced biochemical treatment method for removing heavy metals in sewage, and belongs to the technical field of sewage treatment. The method comprises the following steps: firstly, mixing diatomite and tourmaline to obtain a composite carrier, then soaking the composite carrier in sewage raw water, and stirring the mixture for obtaining compositecarrier slurry after the composite carrier completely absorbs moisture; then, adjusting the pH value of the composite carrier slurry to 7-8 by adopting a pH regulator, and then adding the composite carrier slurry into an anaerobic tank in an AAO biological treatment device; and finally, starting the AAO biological treatment device, enabling the sewage to be treated to flow into the anaerobic tankand the composite carrier and the sewage to enter a subsequent AAO treatment unit together, operating the AAO process for a period of time to perform microbial culture on the composite carrier, and operating the AAO biological treatment device under a normal stable operation stage after the microbial culture of the composite carrier is finished. According to the method, the removal rate of COD andTN in the sewage can be increased while heavy metals in the sewage are intensively removed.

The invention relates to a method for liquifying high-concentration corn starch through an enzyme method, and belongs to the technical field of liquification in corn starch sugar production. The method comprises the following steps: preparing starch milk with the concentration of 50% in a size mixing tank by using water at 40-50 DEG C and first-level starch, and adding high temperature-resistant alpha amylase; and then delivering the starch milk from the size mixing tank into a heat-preserving liquifying tank by using a pump, heating in a jacket by using steam, stirring, and carrying out spray liquification by adopting a spray liquifier. The method disclosed by the invention has the advantages that water consumption can be reduced by enhancing the initial concentration of the starch milk, thereby reducing the steam consumption during the liquification; evaporated water consumption during evaporation concentration can be reduced due to high sugar solution concentration obtained after the liquification, and thus the evaporated steam consumption is reduced. The method disclosed by the invention is simple in process, easy to operate and suitable for being applied to industrialized production.

The invention discloses an amino and Fe (III) bifunctional spherical mesoporous silica adsorbing material and a preparation method and application thereof. The preparation method provided by the invention comprises the following steps of: firstly hydrolyzing tetraethoxysilane (TEOS) serving as a silicon source under an alkaline condition to prepare main spherical silicon dioxide; then, changing the main spherical silicon dioxide into spherical mesoporous silica through a pseudomorphic transformation reaction to increase the specific surface area of the mesoporous silica; and finally, graftingamino and Fe (III) on the surface to prepare the amino and Fe (III) bifunctional spherical mesoporous silicon dioxide composite material. In the process of adsorbing As (V) in water, the amino and Fe(III) dual-functionalized spherical mesoporous silica composite material can realize adsorption of 99.24% or above of As (V) within 1 min, and the adsorption speed is far higher than that of a silicaadsorption material in the prior art.

The invention provides an activated carbon composite material with a three-dimensional porous structure and a preparation method thereof. The composite material comprises activated carbon, inorganic oxide composite soil, a 4A molecular sieve and a binder component. The composite material is provided with three-dimensional pore channels, and the three-dimensional pore channels are communicated with one another through cross-linked intercommunicating pore channels. The preparation method comprises the following steps of: uniformly mixing various materials, treating the mixture with a sodium hydroxide solution, and performing separating, drying and roasting to obtain the composite material. The composite material obtained by the preparation method disclosed by the invention has a stable three-dimensional pore channel structure, and can well adsorb and remove organic pollutants.

The invention relates to the field of stabilizers and discloses a water-soluble acrylic stabilizer, which is prepared from the following components in parts by weight: 10 to 30 parts of an acrylic monomer, 2 to 8 parts of itaconic acid, 30 to 40 parts of acrylamide, 15 to 20 parts of aneutralizer, 0.05 to 0.1 part of a molecular weight regulator, 0.5 to 1.0 part of an initiator and 120 to 140 parts of water. The preparation method of the stabilizer comprises the following steps: stirring the water, the acrylic monomer and the itaconic acid, and adding the neutralizer, wherein the temperature is not more than 40 DEG C and the pH value is 4.5-5.5; adding the acrylamide and carrying out stirring; adding the molecular weight regulator and water and stirring to obtain a mixed solution; taking out 20% of the mixed solution, carrying out heating to 60-70 DEG C, adding the initiator, and slowly dropwise adding the rest 80% of the mixed solution, the temperature being 65-70 DEG C, and the dropping time being 1-1.5 hours; and keeping the temperature for 30-40 minutes after polymerization to obtain the water-soluble stabilizer. The stabilizer prepared by the invention is used for preparing athickener, can improve emulsion polymerization and distillation concentration, is good in storage stability and use stability, and can also reduce the use amount of a thickener continuous phase solvent and reduce the distillation burden at the same time.

The invention belongs to the field of agricultural fertilizer application, and in particular relates to a technology for improving the utilization rate of Zn fertilizers applied to crops. In the agricultural application of Zn fertilizers, after the Zn fertilizers of about 3kg (equivalent to pure Zn) are applied into farmland soil (per hectare) with zinc deficiency, a theoretical concentration of a farmland plowing layer containing low-level available Zn can be improved by 130% to 260% in comparison with an initial concentration of the available Zn in the original soil, and thus the supply capacity of the available Zn in the soil can reach a high level, i.e., the Zn fertilizers can meet the demand of Zn absorption of crops within 3 to 4 years. Therefore, when the Zn fertilizers are applied, only the Zn fertilizers of about 3kg (equivalent to pure Zn) need to be applied to the farmland soil (per hectare) with zinc deficiency at an interval of 3 to 4 years, and the application of the Zn fertilizers each year is not required.

The invention relates to a rapid detection method for a sampling swab and a fully-integrated analysis system for a swab sampled sample. The system comprises a pretreatment unit configured to store, elute and split the sampling swab to separate nucleic acid; a mixing unit configured to uniformly mix the nucleic acid separated by splitting with a reaction reagent; a sample splitting and amplification unit configured to distribute a mixture of a sample and the reaction reagent to each detection unit to realize multi-channel parallel nucleic acid amplification; an optical detection unit configured to detect a nucleic acid amplification result of the sample splitting and amplification unit; a temperature control unit configured to perform heating temperature control on the pretreatment unit and the sample splitting and amplification unit; a motion control unit configured to control the motion of the pretreatment unit, the mixing unit and the sample splitting and amplification unit; and a signal storage processing and analyzing unit, a wired or wireless communication interface, a display terminal and a cloud big data server. After sampling, the swab is loaded into a storage tube at one time without uncovering anymore, and the whole process is closed, so that the problems of infection of subsequent operators, cross contamination in the whole process and the like are effectively avoided.

The invention discloses a stability fertilizer capable of preventing clubroot. The fertilizer is prepared from the components of fluazinam, 3,4-dimethyl pyrazole phosphate, paraffin, vegetable oil, talcum powder, urea, diammonium phosphate and potassium sulfate. The stability fertilizer capable of preventing the clubroot can directly prevent clubroot in soil and reduces the soil acidification degree simultaneously, the fertilizer utilization ratio is improved, the clubroot occurring conditions are limited, and the clubroot is indirectly prevented.