121 results about "Mass concentration ratio" patented technology

A method for treating uranium-containing waste water comprises uranium removal and phosphorus removal two techniques, firstly adding uranium removing agent in a uranium removal tank of uranium-containing waste water according to that the mass concentration ratio of uranium to uranium removing agent is 2-20 to 1, stirring and settling the uranium-containing waste water in the uranium removal tank, processing solid-liquid separation to the flocculated waste water through plate sedimentation tank to remove the uranium in the uranium-containing waste water, so that the uranium removal reaches up to 99%, and then, adding lime milk clarifying solution in the flocculation basin, stirring, settling and solid-liquid separation to remove the phosphorus in the waste water, in which the phosphorus removal reaches up to 99.99%. At last, supernatant is added with acid to regulate the pH value to 6 to 9 in the regulating tank.

The invention discloses a method for processing heavy-metal complexed wastewater through a Fenton reinforced iron-chip internal electrolysis process. The method comprises the following steps of: filling an internal electrolysis filler into an iron-chip internal electrolysis reactor, then introducing the wastewater into the reactor after regulating the pH value of the wastewater to 1.5-3.5, adding a Na2SO4 solution, controlling dissolved oxygen to be not higher than 3.0mg / L, and controlling the flow speed of the introduced wastewater; then introducing the discharged water of the internal electrolysis reactor into a Fenton reactor, maintaining the ferrous concentration in the water to be 300-750mg / L, adding H2O2 according to the mass concentration ratio of H2O2 to Fe2+ of 2.0-7.0, and sufficiently reacting for 60-120 minutes under the condition of controlling the pH value to be 2.5-5.5; and regulating the pH value of the discharged water to 9.0-10.0, standing and settling, and separating mud from the water. According to the method disclosed by the invention, the operation is simple and convenient, the sewage biodegradability can be markedly improved, the difficulty and the organic load of subsequent processing are greatly reduced, and the cost is saved.

The invention relates to a heavy metal settling agent for treating mercury-containing wastewater. The technical scheme of the invention comprises the following steps: adding the heavy metal settling agent formed by mixing 20-60 parts of reactant Na2S, 10-20 parts of flocculating agent Fe3<+>, 1-20 parts of coagulant aid polyacrylamide and 10-40 parts of water into the mercury-containing wastewater; adding Hg and the heavy metal settling agent into the treated water according to the mass concentration ratio of 1:5-1:20 to enable the Hg in the treated water to react to generate HgS precipitates; adsorbing micro HgS suspended particles into flocculent precipitates for precipitating under the action of the flocculating agent and the coagulant aid; and filtering and adsorbing the obtained materials to enable the HgS flocculent precipitates to be separated from the treated water to obtain the qualified water solution. The invention has better effect on removing high-concentration mercury-containing wastewater and low-concentration mercury-containing wastewater, the precipitates after treatment can be separated easily and can not cause secondary pollution, and the invention especially can achieve the effect on removing more than 95% of high-concentration mercury-containing wastewater.

The invention relates to a method for treating mercury-containing wastewater in polyvinyl chloride (PVC) resin production, comprising the following steps: regulating the pH value of the mercury-containing wastewater to be 9-11, and pumping the mercury-containing wastewater into a reaction tank by a pump, and adding sinking agent with the mass concentration of 0.5-0.6 into the reaction tank for full reaction at the meantime, wherein the sinking agent is a Na2S solution, and the mass concentration ratio of the Hg and Na2S of the sinking agent is equal to (1:5)-(1:20); and then adding inorganic coagulant with the mass concentration of 0.01-0.03, naturally precipitating the generated HgS flocculent precipitate, filtering to obtain the supernate which reaches emission standard, and transmitting the precipitated HgS flocculent precipitate to a sludge concentration tank. By utilizing the method in the invention, the problem of environment pollution caused by poor treatment effect on high-concentration mercury-containing wastewater produced in the polrvinyl chloride (PVC) resin industry is solved. The method has the advantage of simple and reasonable process, and the like, is easy to implement, can be widely applied to the treatment of mercury-containing wastewater and is especially suitable for treatment of the mercury-containing wastewater in the polrvinyl chloride (PVC) resin production.

The embodiment of the invention discloses a texturing method for polycrystalline silicon solar cells, which comprises the following steps of: texturing the polycrystalline silicon solar cells by using mixed solution of nitric acid and hydrofluoric acid for the first time; and texturing the polycrystalline silicon solar cells by using mixed solution of nitric acid and hydrofluoric acid for the second time, wherein a mass concentration ratio of the nitric acid to the hydrofluoric acid during the second-time texturing of the polycrystalline silicon solar cell is less than that of the nitric acidto the hydrofluoric acid during the first-time texturing of the polycrystalline silicon solar cells. By the method provided by the invention, a uniform textured structure can be formed on the surfaceof the polycrystalline silicon solar cells so as to improve the photoelectric conversion efficiency of the polycrystalline silicon solar cells.

The invention relates to a drug-loading micro-needle promoted and controlled by a nanogold photo-thermal effect. The drug-loading micro-needle is composed of three components including gold nanoparticles, a photosensitizer wrapped by a lipidosome and a soluble micro-needle substrate material, wherein the mass concentration ratio of the three components in the micro-needle is 1:(1-50):(1-100). By utilizing the nanogold photo-thermal effect, the photo-thermal effect is generated by stimulating nanogold mixed in the micro-needle, so that decomposition of the micro-needle is promoted; therefore, rapid and controllable release of drugs are realized; when nanogold and the drugs enter skin tissue, the skin tissue permeability can be continuously increased through the nanogold photo-thermal effect, so that the drugs can be well delivered into deep tissue. The drug-loading micro-needle disclosed by the invention is a medical application research by combining an optical technology with a micro and nano technology in the field of biomedical engineering; in particular for a micro-needle system loaded with photosensitizer drugs, in the event of monitoring the photosensitization in tissue in real time, individual photodynamic therapy based on individual differences of patients can be realized through control of drug release by nanogold.

The invention provides a method for preparing fish meal protein peptide. The method comprises the following steps: (1) taking defatted marine fish meal as a raw material, and adding water for dissolving according to the weight-bulk ratio of material to liquid being (1: 5)-(12.5); (2) under the temperature of 115-130 DEG C and pressure of 0.75-1.75 kg / cm<2>, cooking for 20-30 minutes; cooling to obtain cooking liquid; (3) adjusting the pH value of the cooking liquid to 7.0-9.5; adding protease, controlling the mass concentration ratio of protease to substrate to be 0.5-2.5 percent, and carrying out enzymolysis under the temperature of 45-70 DEG C to obtain enzymatic hydrolysate; and (4) heating the enzymatic hydrolysate to the temperature of 90-95 DEG C, inactivating and drying. The fish meal protein peptide is high in small-molecule oligopeptide content and digestibility. The fish meal protein peptide as a feed additive is matched with feed to be eaten by animals, so that the bioavailability of fish meal protein can be improved, the animal immunity also can be improved, and the disease resistance is enhanced.

The invention discloses a graphene quantum dot nuclear targeting medicine carrying system as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, sterilizing an aqoeous solution of a graphene quantum dot and an aqoeous solution of an anti-cancer medicine; secondly, mixing the aqoeous solution of the graphene quantum dot and the aqoeous solution of the anti-cancer medicine according to the mass ratio of (5:1)-(50:1) to obtain a medicine carrying system; thirdly, co-cultivating the medicine carrying system and cells, detecting the toxicity of the cells by using an MTT (Methyl Thiazolyl Tetrazolium) method and detecting a medicine loaded into the cells by using a fluorescent microscope. According to the invention, by virtue of the characteristic that the graphene quantum dot has a single-atom planar structure, the graphene quantum dot and a micromolecule anticancer medicine with a polycyclic planar structure are combined by bonds to form the medicine carrying system which can stably exist in the aqoeous solution. The graphene quantum dot has a medicine carrying function; meanwhile, the graphene quantum dot has a special structure, so that the toxicity of the medicine to the cells can be increased. The medicine carrying system has the advantages of lower toxicity, simple preparation method, easiness for implementation and double functions of carrying the medicine and enhancing the toxicity of the medicine to the cells.

The invention discloses a biosorbent of heavy metal, a preparation method thereof and application. Nutritive materials are added into residual activated sludge and C / N and pH are respectively adjusted to 5:1-8:1 and 5-7 so as to obtain microbial media in which the yeast is inoculated in shaking culture at the temperature of 30-37 DEG C and the speed of 100-200rpm for 25-35h and then is centrifuged for 5-10min at 3000-4000rpm; the collected bacterial sludge is the biosorbent of heavy metal. The sorbent is added into the heavy metal waste water with quality concentration ratio between the sorbent and the heavy metal waste water of 5-10g / L:10-20mg / L, table shaken with rotational speed at 50-200rpm for 2-8h and the treatment of heavy metal waste water can be realized by centrifugalization. The invention can reduce production cost of the sorbent, save operation cost of sewage treatment plants and improve the treatment efficiency.

The invention belongs to the filed of microbiological fuel cells, and provides a method for strengthening electricity generating performance of an MFC (Microbial Fuel Cell) by taking excess sludge as fuel and strengthening sludge reduction by enzyme. The method comprises the steps of adding 20mM of NaCl in the excess sludge for strengthening the electrical conductivity of solution, adding neutral protease and Alpha-amylase, and generating electricity by directly using electricity generating microorganisms in the excess sludge for one day so as to start the MFC and obtain higher electric energy, wherein the strengthening effect of the neutral protease and the Alpha-amylase on an SMFC (Sediment Microbial Fuel Cell) at 40 DEG C is the most obvious. Under a condition that the total concentration of the enzyme is not changed, the mass concentration ratio of the neutral protease and the Alpha-amylase is 2:3, at the moment, the power density is the largest (776mW*m-2), and the removal rates of TCOD (total chemical oxygen demand), TSS (total suspended solids) and VSS (volatile suspended solids) reach 87.29%, 91.75% and 95.01% respectively. The method is fast in starting, simple in process, convenient to operate, and low in cost, and can treat the excess sludge in an urban domestic sewage treatment plant.

The invention discloses a glutaraldehyde decyl methyl ammonium bromide compound disinfectant comprising major components of glutaraldehyde and decyl methyl ammonium bromide, wherein the mass concentration ratio of the glutaraldehyde to the decyl methyl ammonium bromide is 5:1. The disinfectant with this ratio is good in bactericidal effect, and the synergistic bactericidal action of the two components can achieve the best; the bactericidal action is strong, the acting time is short and the applicability is good; the safety is good, no mutagenic action is caused to a tk gene of an L5178Y cell; and the metal corrosivity is low, and the influence on port containers is small, so that compound disinfectant can be widely applied to disinfection and sterilization of the port containers without influencing reusability of the containers.

The invention provides a preparation method of fish meal protein peptide. The preparation method comprises the following steps: (1) taking degreased marine fish meal as the raw material, dissolving the fish meal in water according to a weight / volume ratio of 1:5-12.5; (2) boiling for 20 to 30 minutes at a temperature of 115 to 130 DEG C under a pressure of 0.75 to 1.75 kg / cm2, cooling so as to obtain a boiled liquid; (3) adjusting the pH value of the boiled liquid to 7.0-9.5, adding protease, controlling the mass concentration ratio of the protease to the substrate to be 0.5 to 2.5%, carrying out enzymolysis at a temperature of 45 to 70 DEG C so as to obtain enzymatic hydrolysate; (4) heating the enzymatic hydrolysate to 90 to 95 DEG C to inactivate the enzymes, adding active carbon, maintaining the temperature, continuously stirring at the same time so as to carry out decoloring and deodorization, then transporting the processed enzymatic hydrolysate into a plate-and-frame filter press to carry out filter pressing, condensing the clarified filtrate, and finally spray-drying so as to obtain the fish meal protein peptide. The prepared fish meal protein peptide is rich in nutrients, is easy to digest and absorb, and can strengthen the immunity. The nutrition value and biological utilization rate of low-market-value marine fishes are prominently improved. The protein peptide is suitable for preparation of various kinds of functional healthcare foods or nutrition foods.

The invention discloses a method for synchronously removing ammonia nitrogen and nitrate nitrogen in a continuous flow USB reactor through a short-range denitrification reinforcement DEAMOX technology, and belongs to the field of sewage treatment. The method comprises the steps that a USB reactor is inoculated with DEAMOX granule sludge, nitrate nitrogen is converted into nitrite nitrogen through an organic carbon source in fed water in short-range denitrification, ammonia nitrogen in the fed water is removed through the in-situ anaerobic ammonia oxidation effect, and the purpose of efficiently removing nitrogen is achieved by optimizing the mass concentration ratio of nitrate nitrogen to ammonia nitrogen in wastewater and controlling and adjusting the flow of organic carbon source in fed water. The problems that treatment of wastewater containing ammonia nitrogen and nitrate nitrogen is low in treating efficiency and high in energy consumption are effectively solved, aeration consumption in the aerobic stage is not needed, the external carbon source consumption is reduced, the residual sludge yield is low, and the follow-up treating cost is greatly reduced; in addition, the DEAMOX technology achieved in the continuous flow USB reactor has the advantages that the reaction speed is high, nitrate nitrogen produced in anaerobic ammonia oxidation process is removed in situ, and the total nitrogen removal rate and the denitrifying load are high.

The invention relates to a method for comprehensively recovering uranium and rhenium from a leaching solution with ion exchange resin. Aiming to the problems of large mass concentration ratio of the uranium and the rhenium in a rhenium ore and uranium ore containing leaching solution and difficulty in separation recovery, strongly basic anion-exchange resin with stronger adsorption ability is preferred to adsorb the uranium and the rhenium in the leaching solution firstly at the same time; and then aiming to uranium and rhenium loading resin, by utilizing the characteristic that the resin is stronger in the binding capacity to the rhenium than to the uranium and adopting desorption agents with different desorption capacities to sequentially realize respective desorption and separation of the uranium and the rhenium, comprehensive recovery of the uranium and the rhenium in the leaching solution is finally realized. By adopting the method, 98 percent or above of the uranium and 95 percent or above of the rhenium in the rhenium ore and uranium ore containing leaching solution can be recovered; in an obtained uranium qualified liquid, rho (U) reaches 10g / L or above, and rho (Re) is smaller than 1.0mg / L, and in an obtained rhenium qualified liquid, rho (Re) reaches 0.5g / L, and rho (U) is smaller than 5mg / L. The method is good in separation effect of the uranium and the rhenium, highin recovery rate of the uranium and the rhenium and simple in technological process and is an effective way of comprehensively recovering the uranium and the rhenium from the leaching solution.

A process for degradating the nitrobenzene-type pollutants by wet catalytic coxidizing method includes such steps as loading said pollutants into a high-pressure reactor, adding cooxidizing substance and catalyst, and cooxidizing reaction at 100-250 deg.C under 0.5-10 MPa.

The invention provides an antigen-antibody complex for preventing and / or treating avian influenza, which comprises inactivation avian influenza totiviruses which are used as antigen and an immune body thereof, and the mass concentration ratio of the antigen and the immune body is more than 1. After entering organisms to perform initial immunization, the antigen-antibody complex stimulates the organisms again to induce immunoreaction, and immune response is quick in speed and strong in reaction; the antigen-antibody complex used as a carrier is more favorable for capturing and presenting antigen presenting cells and can also strengthen a breeder reaction of T cells effectively; purified totiviruses used as the antigen increase the molecular weight of the complex, are more favorable for ingestion of immunocyte of the organisms on the antigen, cause the more extensive immunoreaction quickly, and have a significance for preventing avian influenza viruses of which the antigen is easy for variation. A preparation of the antigen-antibody complex does not need to use solid carriers, does not cause intense stimulus on the organisms or initiates the organisms to generate an adverse reaction, and is simple to prepare and safe and convenient to use.

A liquid for culturing diatom comprising nitrogen, silicon and phosphorus, wherein a value of silicon / nitrogen, representing the ratio of concentration by mass of silicon to nitrogen, is set to be a value of 0.06 or more, and a value of phosphorus / nitrogen, representing the ratio of concentration by mass of phosphorus to nitrogen, is set to be a value of 0.18 or more, and the pH of the culture liquid is set in the range of 6.4 to 8.4. The culture liquid allows the culture of Chaetoceros at a cell concentration greater than the maximum value (3 X 10<13> cells / m<3>) achieved by the conventional culture methods and with stability.

The invention provides a method for preparing a soil conditioner from molasses alcohol waste liquor. The method comprises steps as follows: Step A: the molasses alcohol waste liquor is concentrated to comprise 38%-51% of organic matters in percentage by mass concentration and comprise 0.84-1.98 g / kg of P, 35.12-90.93 g / kg of K, 5.55-39.90 g / kg of Ca, 1.02-70.31 g / kg of Mg and 16.52-50.40 g / kg of N, wherein the pH ranges from 4.2 to 5.1, and the Brix of the concentrated liquor ranges from 35 to 50; Step B: fermentation strains are screened, that is, bacillus subtilis, streptomyces jingyangensis and saccharomyces cerevisiae are selected; Step C: leaven is produced (for the fermented and concentrated alcohol waste liquor); Step D: the leaven is added to the concentrated molasses alcohol waste liquor for fermentation, and the soil conditioner is obtained. According to the method for preparing the soil conditioner from the molasses alcohol waste liquor, organic waste produced in the sugarcane industry is recycled.

The invention relates to a method for increasing the forming speed of anaerobic ammonia oxidation granule sludge. The method comprises the steps that practical industrial wastewater with low C / N is taken as a culturing nutrient source of the anaerobic ammonia oxidation granule sludge, and the mass concentration ratio of NH4<+>-N to NO2<->-N of inflow water is controlled to be (1.05-1.42) to 1; a mixture of anaerobic sludge and livestock breeding faeces is taken as inoculated sludge, by means of the modes of changing the substrate concentration of the inflow water, shortening the hydraulic retention time, controlling the granule size, the granule sludge settling speed and MLVSS / MLSS of the anaerobic ammonia oxidation granule sludge and the like, a nitrogen load of anaerobic ammonia oxidation inflow water is changed, the retention and amplification problems of anaerobic ammonia oxidation bacteria can be effectively solved, and by means of granulation of anaerobic ammonia oxidation sludge, the influence of nitrogen removal efficiency dropping caused by environmental changes can be weakened to some extent.

The problem to be solved by the present invention is to provide a significant improvement in the properties in Cu—Ni—Co—Si alloy by adding Cr, i.e., to provide Corson alloys having high strength and high electrical conductivity. There is provided a copper alloy for electronic materials comprising 1.0 to 4.5 mass % of Ni, 0.50 to 1.2 mass % of Si, 0.1 to 2.5 mass % of Co, 0.003 to 0.3 mass % of Cr, with the balance being Cu and unavoidable impurities, the mass concentration ratio of the total mass of Ni and Co to Si ([Ni+Co] / Si ratio) satisfies the formula: 4≦[Ni+Co] / Si≦5, and with regard to Cr—Si compound whose size is 0.1 to 5 μm dispersed in the material, atomic concentration ratio of Cr to Si in the dispersed particle is 1-5, and area dispersion density thereof is more than 1×104 / mm2, and not more than 1×106 / mm2.

The invention provides a polymeric composite material and a preparation method thereof. In the polymeric composite material, the mass concentration of a filler in a polymeric matrix is 0.1-20ppm, wherein the filler is at least one of graphene, silicon dioxide, carbon nanotube, carbon black, aluminum oxide, zinc oxide, calcium carbonate, titanium dioxide, talcum powder and montmorillonite; and the polymeric matrix is at least one of epoxy resin and unsaturated resin. The preparation method comprises the following steps: uniformly premixing the filler and a proper amount of polymeric matrix to form a master batch, wherein when the polymeric matrix contains epoxy resin, a polymeric medium needs to be added to reduce the viscosity of the polymeric matrix; and taking a proper amount of master batch, diluting the master batch into the polymeric matrix according to the mass concentration ratio of the filler in the polymeric matrix, and uniformly mixing to obtain the polymeric composite material. The polymeric composite material provided by the invention is favorable in monodispersity and high in mechanical property; and the preparation method is simple, easy to operate and easy to realize industrial large-batch production operation.

The invention discloses a liquid phase oxidation catalyst which is used to desulphurize fire coal flue gas. The invention comprises a surface active agent, M2+1, M3+2 and industrial-grade urea, wherein the mass ratio between the surface active agent and the industrial grade urea is 1:40-1:60, the solution mass concentration ratio between the M2+1and the M3+2 is 10:1-30:1, the mass ratio between the surface active agent and the M2+1 is 1:80-1:90, and M is Mn or Fe or Mg. The oxidative catalyst of the invention is very easy to be dissolved in water, and water solution is weakly-acidic. Density range is 2.75-2.93*103kg.m-3, and physiochemical stability is comparatively good. The invention only has catalytic oxidative effect in the process of flue gas desulphurization and no consumption theoretically, and can be used in circulation. The oxidative catalyst of the invention is adopted to desulphurize the fire coal flue gas, desulphurizing efficiency can be increased, simultaneously a desulphurizing process can be simplified (without an oxidation draught fan process), the operational cost of the flue gas desulphurization can be lowered greatly, and the invention has great practical applicable value and wide applicable foreground.

The invention discloses a method for removing a byproduct bromate of an ozone process from water. The method comprises the following steps of: (1) introducing nitrogen into a reactor filled with the aqueous solution of bromate so as to remove dissolved oxygen from the aqueous solution and ensure that the concentration of the dissolved oxygen in the bromate aqueous solution is less than or equal to 2 mg / L; and (2) adjusting the initial pH value of the aqueous solution in the reactor to be between 3.5 and 10.5 and the reaction temperature to be between 10 and 30 DEG C, and then adding nano-iron into the reactor and reacting for 10 to 30 minutes, wherein the mass concentration ratio of the nano-iron to the bromate in the aqueous solution is (5-40):1. Compared with the prior art, the method has the advantages of simple reaction conditions for removing the bromate, convenient operation, wide application range and high reaction efficiency; moreover, when a relatively small amount of nano-iron is added, the bromate removing rate is over 90 percent, and the iron content in the water is less than 0.3 mg / L, which meets the Standards for Drinking Water Quality (GB5749-2006).

The invention discloses a cyanide-free chemical gold plating solution applied to the advanced wafer packaging field and a gold plating process thereof. The cyanide-free chemical gold plating solution is prepared from the following components: cyanide-free gold salt with the content of Au ions being 6-10 g / L, 10-60 g / L of a complexing agent, 10-60 g / L of conductive salt, 30-60 g / L of a buffer agent, 5-10 g / L of an anti-aging agent, 15-80 mg / L of an interfacial agent, 1-5 mg / L of a wetting agent, 50-80 mg / L of a reaction accelerator, and 0.2-5 mg / L of a stabilizer, wherein the reaction accelerator is a compound of 2,6-diaminopyridine and 3-pyridine methanol, and the mass concentration ratio of the 2,6-diaminopyridine to the 3-pyridine methanol is 2:1. The solution not only ensures the stability of the plating solution, but also enables a plated part to be easily spread on the surface of an electrode so as to achieve the purpose of uniform plating, and therefore the effect of void-free and seamless filling of wafer packaging micropores is further achieved.

The invention discloses an organosilicone-break-emulsification agent and an application thereof. The water treatment agent of the organosilicone-break-emulsification agent is prepared from cationic demulsifie (NM), flocculant (PDMNAAC)and organosilicone surfactant (Y1714) with a mass concentration ratio of 10: 3: 1. The specific use method aiming at W refining decompression tower top oily sewage is adding the organosilicone-break-emulsification agent of 30-80 mg / L to achieve an oil removal rate of 85% or higher. The effects of demulsification by the demulsifie NM, adsorption bridging and electrical neutralization by the flocculant PDMDAAC, oil-water interface tension decreasing and oil-water interface film tensity reducing by the organosilicone surfactant Y1714 and the like are synthetically developed through the compounding of cationic demulsifie (NM), flocculant (PDMNAAC)and organosilicone surfactant (Y1714). Accordingly, the effect result of oil-water separation is achieved. The organosilicone-break-emulsification agent and the application thereof has the advantages of requiring little water treatment agent dosage, producing little sediment and being high in oil removal rate in the aspect of refining decompression tower top sewage treatment and has certain referential value to refining decompression tower top sewage treatment.

The invention belongs to the technical field of sewage treatment, and relates to a device and method for obtaining an anaerobic ammonia oxidation matrix from municipal sewage through continuous flow endogenous short-range denitrification. An AOA continuous flow process is used for directly surpassing part of a mud-water mixture in an anaerobic zone to an anoxic zone, and by regulating the ratio ofthe water inlet flow of the municipal sewage to the flow of the surpassed mud-water mixture, the mass concentration ratio of ammonia nitrogen to nitrite nitrogen in effluent is stabilized at 1 to 1.32; and the endogenous denitrification process of GAOs only proceeds to the nitrite stage, the organic carbon source requirements are saved, aerobic phosphorus absorption and denitrification and phosphorus removal are coupled with endogenous short-range denitrification, phosphorus removal, carbon removal and stable nitrite accumulation of the municipal sewage without additional carbon sources are achieved, a stable reaction matrix of the ammonia nitrogen and the nitrite nitrogen is provided for the anaerobic ammonia oxidation process, the problem that the accumulation rate of the nitrite is notprone to being stabilized and maintained during short-range nitrification is solved, and a new idea is provided for practical engineering application of a mainstream anaerobic ammonia oxidation process of the municipal sewage.

The invention relates to a method for removing bromide ions out of bromide ion-containing drinking water. The method is characterized by comprises the following steps of: before the bromide ion-containing drinking water is treated by using an ozone-biologic activated carbon process, adding 0.5-1mg / L potassium permanganate into raw water, preoxidizing for 3-5 minutes, and then sequentially adding 12-18mg / L polymeric aluminum by Al and 8-12mg / L ferric trichloride by Fe for coagulating, wherein the mass concentration ratio of polymeric aluminum to ferric trichloride is 3:2. The method is simple to operate and safe and reliable, the bromide ion content (100-100mu g / L) of the raw water is reduced by 45-70%, and the purpose of controlling the bromine disinfection by-product generation in the later ozonation bromate and disinfection period is reached; therefore, the method has wide application prospects.

A process for degradating the nitrobenzene-type pollutants by wet catalytic coxidizing method includes such steps as loading said pollutants into a high-pressure reactor, adding cooxidizing substance and catalyst, and cooxidizing reaction at 100-250 deg.C under 0.5-10 MPa.

The invention discloses a graphene oxide dispersion carbon nanotube solution and a preparation method thereof. The graphene oxide dispersion carbon nanotube solution comprises a carbon nanotube and agraphene oxide solution, wherein a mass concentration ratio of the graphene oxide and the carbon nanotube in the solution is (1 to 10) to 1. The preparation method comprises the following steps: 1, preparing the graphene oxide solution by adopting an improved Hummers method to control a water addition amount in an oxidation step; 2, weighing the carbon nanotubes, placing the carbon nanotubes intoa container, adding an appropriate amount of graphene oxide solution, diluting the graphene oxide solution by adding alcohol, so as to obtain suspension of the graphene oxide and the carbon nanotubes;and 3, ultrasonically dispersing the suspension of the graphene oxide and the carbon nanotubes by utilizing an ultrasonic stirrer, and obtaining the carbon nanotube dispersion solution comprising thegraphene oxide. By adopting the graphene oxide dispersion carbon nanotube solution and the preparation method thereof, the problems that the carbon nanotubes are poor in dispersion effect and easy insecondary clustering can be solved, the damage of the carbon nanotube structure can also be avoided, and the mechanical performance of a matrix material can be improved.