106results about How to "Fast decolorization" patented technology

The invention discloses a method utilizing small-molecule diketone to serve as optical active agent for oxidation treatment of dye waste water and belongs to the field of dye waste water treatment. The method comprises the steps: filtering the dye-containing waste water to remove suspended matter; adding a small-molecule diketone compound to the dye-containing water body, and evenly mixing; and placing the dye-containing water body under an ultraviolet source to perform irradiation until dyes are decolorized. The method initially determines the structural characteristics of diketone capable of serving as the dye-decolorizing optical active agent: the molecular configuration is in a chain shape, and molecules are small. The dye-decolorizing method based on diketone is based on a reaction induced by ultraviolet light, can achieve efficient decoloration of various dyes, and has remarkably higher decoloration efficiency than a traditional UV/H2O2 method. Besides, the decoloration efficiency is not subjected to influence of coexistent alcohol in the water body, simultaneously the acid environment is favorable for promoting the reaction, and accordingly the method has more obvious advantages in the acid water body. The method has an autoacceleration performance in degrading the dyes, and the degradation speed is improved along with proceeding of the reaction.

The invention discloses a preparation method and an application of hydrophobization beta-cyclodextrin cation polyelectrolyte. In a water phase, three monomers, namely polymerizable beta-cyclodextrin derivatives, acryloyl oxyethyl trimethyl ammonium chloride and styrene, are subjected to a free radical copolymerization reaction under an oxidation/reduction (potassium peroxodisulfate/sodium hydrogen sulphite) initiating system to obtain the hydrophobization beta-cyclodextrin cation polyelectrolyte product. The hydrophobization beta-cyclodextrin cation polyelectrolyte product is white powder solids and is stable in structure and convenient to store and transport, hydrophilcity is reduced and better solubility is still maintained; the preparation method of the hydrophobization beta-cyclodextrin cation polyelectrolyte product is simple, and low in energy consumption; no other auxiliaries such as a surface active agent is added in an aqueous solution polymerization process, and environmental pollution is less; and the hydrophobization beta-cyclodextrin cation polyelectrolyte product can serve as a novel flocculating agent for decoloration, the specific structure of beta-cyclodextrin (beta-CD) is reserved, toxicity and cost are low, flocculation capacity is strong, decoloration speed is high, an applicable pH range is wider (2-12), and salt tolerance is high.

The invention relates to a modified and high-efficiency multi-function decolorizer of titanium dioxide acid hydrolysis waste residue and a preparation method thereof. Acid hydrolysis waste residue containing titanium sulfate is successively and respectively added with sodium hydroxide, peroxide, waste acid and calcium and magnesium powder according to the weight rate of the materials, therefore, the acid hydrolysis waste residue containing titanium sulfate generates nanometer titanium dioxide by nutralization, hydrolysis and acidification; added ferrous iron and iron in the acid hydrolysis waste residue are dehydrated at the temperature of 100-200 DEG C, oxidized at the temperature of 400-500 DEG C and then generate polymerization ferrous sulfate after natural cooling, telomerization and aging. The organic pollutants in wastewater are rapidly degraded by nano TiO2 and directly converted into non-toxic and harmless CO2, H2O and inorganic matters. Without changing the pH value of original sewage, the coagulation speed is fast, alumen ustum is big, settlement is quick, and the decolorizer has the functions of decolorization, degerming, removing radioactive elements and heavy metal ions, reducing COD and BOD, small feeding amount and strong adaptability.

The invention relates to the technical field of wastewater treatment, and in particular discloses a wastewater treatment system for bioelectrocatalysis and photocatalysis contact oxidation coupling. The wastewater treatment system comprises a first tube body, a second tube body and a third tube body which are connected in sequence, wherein a liquid inlet hole is formed in the wall of the first tube body; a liquid outlet hole is formed in the third tube body; a biological cathode is arranged inside the first tube body; the biological cathode is connected with an external circuit; a biological anode is arranged inside the second tube body; the biological anode is connected with the external circuit; microorganisms are adhered to the surfaces of the biological anode and the biological cathode; the third tube body is internally provided with mixed packing and an ultraviolet lamp; the center of the mixed parking is a cavity; and the ultraviolet lamp is arranged inside the cavity. Due to reasonable arrangement of the structure and the spatial utilization of a biological membrane inside the mixed parking, dissolved oxygen can be utilized in the wastewater treatment system in a gradient manner, so that the problem that the dissolved oxygen cannot be precisely controlled when a micro oxygen technique is used is solved, and in addition, removal of azo dyes, intermediates and residual COD (Chemical Oxygen Demand) in wastewater by a biological membrane at a contact oxidation part is improved.

The invention relates to a method for decoloring biodiesel prepared from gutter oil. The method comprises the following steps: 1, preparing biodiesel from gutter oil through ester exchange; 2, decoloring: adding 100g of biodiesel to a 250ml flask, adding hydrogen peroxide which is 5-25% oil weight in mass percentage, wherein heating temperature is 70-90 DEG C, stirring, reacting for 18-25min, centrifuging and reserving an upper phase; 3, calculating a decolorization ratio: respectively adding the obtained grease in a 1.0cm cuvette, and implementing absorption spectrum scanning on 465nm, wherein the decolorization ratio is defined as a ratio of a difference in absorbance indexes before and after biodiesel decolorization to an absorbance index before decolorization. The method has the beneficial effects that the method, through a hydrogen peroxide oxidation process, has an obvious decolorization effect on deep-color biodiesel prepared from the gutter oil. And the decolorization method is simple to operate, high in decolorization speed and high in recovery efficiency, and the biodiesel decolorized by the method has no large difference with the biodiesel before decolorization in both physical and chemical property.

The invention discloses an acidic dye wastewater treatment agent, belonging to the field of sewage purification treatment. The treatment agent is prepared from polyaluminum chloride, ferrous sulfate, active silica, oxydol, activated carbon and chlorine dioxide. All the components are uniformly stirred and completely dissolved at room temperature. The application temperature is 4-60 DEG C. The acidic dye wastewater treatment agent is suitable for treating acidic sewage. The Fenton reagent composed of the ferrous sulfate and oxydol according to certain parts by weight is combined with the inorganic flocculant polyaluminum chloride to form the main component of the sewage treatment agent; by using the active silica as the assistant, the suspended substance are quickly settled under the synergistic actions of the Fenton reagent, main component and assistant; and the combination of the activated carbon and chlorine dioxide can implement quick disinfection, decolorization and sewage purification. The acidic dye wastewater treatment agent has the advantages of low treatment cost, no corrosiveness, no toxicity and no secondary pollution after treatment.

A process for treating the sewage containing azo dye includes such steps as regulating pH value to less than 2.5, adding iron powder, stirring for decolouring, and radiating by ultraviolet light for optical degradation. Its advantages are high speed and effect, and no secondary pollution.

The invention discloses a preparation method of a decolorizing membrane for printing and dyeing wastewater. The decolorizing membrane is prepared from copper acetate monohydrate, sodium borate decahydrate, dopamine hydrochloride, 2-bromoisobutyryl bromide, nanometer titanium dioxide, hydrazine hydrate, chitosan, chloroacetic acid, silver nitrate, beta-cyclodextrin, polyacrylic acid and other raw materials. Obtained silver particles are loaded with the chitosan, the beta-cyclodextrin and the like for embedding, and a stable fiber membrane structure is formed by electrospinning and thermal crosslinking. The obtained fiber membrane is impregnated with grafted nano-titanium dioxide, a large number of active sites on the surface of the membrane are used for increasing the reaction contact surface with the wastewater, and then a layer of nano-copper membrane is impregnated and loaded with the copper acetate monohydrate. The process of a reduction reaction is accelerated by the characteristicof rapid electron conduction, and the dye decolorizing speed is increased, so that the obtained decolorizing membrane has high efficiency and high stability, and the defects of the traditional decolorization treatment of the printing and dyeing wastewater are overcome. The preparation method has significant application value in pollution control.

An embodiment of the present application provides an electrochromic device comprising an electrochromic element, wherein the electrochromic element enters a second state when a first voltage is applied to the electrochromic element in a state where the electrochromic element has a first state, and the electrochromic element enters a third state when the first voltage is applied to the electrochromic element in a state where the electrochromic element has a fourth state.

The invention discloses a preparation method for dihydrostreptomycin sulphate and belongs to the production preparation technology of semi-synthesis antibiotics. The method comprises the following steps: treating with acid; performing ion exchange; adsorbing with large-pore amino resin; hydrogenating; performing secondary ion exchange; purifying by a mixed bed; treating with activated carbon; concentrating through a nanofiltration membrane; decolorizing by activated carbon; and treating with an ultrafiltration membrane and performing spray drying. According to the invention, the dosage of oxalic acid in a preparation process is reduced, the use ratio of the reducing agent is increased, the production cost is lowered, the production efficiency is increased, the method can meet the industrial production requirement and the product purity, quality yield and total recovery of the dihydrostreptomycin sulphate are increased.

Belonging to the technical field of sewage treatment, the invention discloses a device and method for promoting rapid anthraquinone dye decolorization based on microbial fuel cell technology. The method is based on the combination of anaerobic sludge decolorization and bioelectrochemical treatment technology, a two-chamber microbial fuel cell system is constructed, electrogenesis bacteria and anaerobic sludge with decolorization function are added to the positive electrode, also glucose is added as a co-substrate to coordinate decolorization of the anthraquinone dye reactive brilliant blue KN-R, at the same time a culture solution is added as the nutrient to ensure the anaerobic environment of the positive electrode, air is introduced to the negative electrode to serve as the electron acceptor of the system, and the positive electrode and negative electrode are externally connected to a resistor to compose a loop. The device and method for rapid decolorization of anthraquinone dye provided by the invention have good effect, and have the advantages of small floor area, wide application range, simple equipment, easy operation, good treatment effect, energy recovery and the like, andcan be wide applied to biological treatment of sewage in the printing and dyeing industry and recovery of part electric energy, thus having good economic and environmental protection benefits.

The invention discloses a wood modifier, which is prepared from the following components based on a preparation ratio: 1 part of 10-20% hydrogen peroxide solution and 1 part of mixed solution of 1-5% of sodium silicate and 0.1-0.5% sodium hydroxide. A sponge is used to dip the wood modifier, and press pressure and dosage are adjusted to coat the wood modifier so as to achieve the effect of decolorization and modification based on the different color shades of the parts to be processed of the wood floor. The invention has good decolorization and modification effects, improves the utilization rate of solid wood raw materials, lowers cost, maintains the visual effect consistency after the solid wood floor color is coated, and improves the solid wood floor quality.

The invention relates to an actinidia polygama effervescing agent and a preparation method and application thereof. The preparation method comprises the following steps: mixing the following components in parts by mass: 3-5 parts of an extracted active polysaccharide mixture, 24-30 parts of sodium bicarbonate, 15-20 parts of citric acid, 1-3 parts of an adhesive, 10-14 parts of xylitol, 4-6 parts of freeze-dried powder of filtrate obtained after actinidia polygama polysaccharide extraction and 2-5 parts of sodium alga acid, preparing a soft material, granulating, drying, pelletizing, and adding 30-50 parts of a juice clathrate compound, thereby obtaining the effervescing granules. According to the method, the process is simple, the active ingredients of the product are clear, the natural VC retention rate is over 70 percent, a xylitol formula system is adopted, and the effervescing agent is good in taste and is suitable for diabetes mellitus patients to take. The experiment proves that the actinidia polygama active polysaccharides and effervescing granules have a certain treatment effects on type II diabetes mellitus; and moreover, the effervescing agent can be widely applied to antioxidant, anti-fatigue and blood sugar-reducing foods and/or health products.

The invention relates to a method for decolorizing direct dye wastewater and particularly relates to an electrochemical decoloration method of direct dye wastewater. The method utilizes FTO glass as an anode material and carries out electrochemical decoloration of wastewater in an electrolytic cell. The fluorine-doped tin oxide conductive glass (FTO glass) is used as an anode material and has good light transmittance. If needed, a photocatalytic reagent can be simultaneously added to the waste liquid so as to realize photocatalytic and electrochemical decolorization at the same time so that decolorization effects are improved and energy consumption is reduced. The method has the advantages of significant decoloring effects, low chroma of the decolorized solution, good translucency and repeated use of the electrode, can realize quick decolorization of a direct dye and is conducive to environmental protection.

Provided are preparation and application of a refined decolorizing agent and cleaning for edible oil. Composite available chlorine gas is obtained through a chlorate aqueous solution under the condition of taking inorganic acid or organic acid as an oxidation reductant, a secondary chemical reaction is conducted for adsorption through stabilizer carrier hydroxide and a silicon compound, and a granular composite finished product of the refined decolorizing agent is obtained through concentration, fluidized drying and granulation; particularly, acid reaction mother liquor is not taken as waste liquor to be discharged, and the reaction mother liquor is reused. The preparation and application of the refined decolorizing agent and cleaning for the edible oil can be used for animal and vegetable oil refined decolorizing and specially for edible oil refined decolorizing, and the industry can respond to the important contribution on the aspects of energy conservation and emission reduction provided by the country; the edible oil industry can save energy by over 80 percent, and discharge of the waste clay residue containing oil is reduced by 100 percent, and the preparation and application of the refined decolorizing agent and cleaning for the edible oil can be further used for other food and organic matter decolorizing. The product has important environmental and economic value, wide application and promotion prospects are achieved, and the product takes the leading position in the world.

The invention relates to a water purifying agent for rapid treatment of industrial wastewater and a preparation method thereof, wherein the water purifying agent comprises the following components inparts by weight: 20-35 parts of a nano diatomite powder/cellulose composite material, 5-10 parts of alkyl glycoside or derivative surfactant thereof, 60-75 parts of a flocculating agent and 2-6 partsof nitrifying bacteria. The water purifying agent prepared by the invention is simple in components and reasonable in proportion, does not contain heavy metal components in the formula, is mostly a natural compound, is an environment-friendly water purifying agent, and avoids secondary pollution to a water body; cellulose and diatomite powder are subjected to nanocrystallization and compounding, have huge specific surface area, can adsorb a large number of polluting organic matters, are fully mixed with specific contents of raw material components, and have the effects of rapid sedimentation,decolorization and COD removal; and alkyl glycoside or derivatives thereof are added, so that the water purifying agent has sterilization and disinfection effects on the water body, can effectively kill bacteria and microorganisms in the water body, and avoids water body pollution caused by mass propagation.

The invention provides a printing and dyeing wastewater purifying flocculating agent, and a printing and dyeing wastewater purifying application thereof. The flocculating agent meets the environmentally-friendly requirement, and has the technical advantages of excellent decolorizing and purifying effects, realization of fast decolorizing, and high purifying efficiency. The printing and dyeing wastewater purifying flocculating agent comprises a mixture of the following powdery components: N-carboxyethylchitosan, cationic starch and bentonite, wherein a mass ratio of the N-carboxyethylchitosan to the cationic starch is 2:(3-4), and a mass ratio of the bentonite to the N-carboxyethylchitosan is 5:(1-4). The invention provides the printing and dyeing wastewater purifying application of the flocculating agent. The flocculating agent has the advantages of natural degradability, non-toxicity, and low prices of above materials; and the decolorizing rate of the flocculating agent can reach 90% or above when the flocculating agent is mixed with wastewater for only 10 minutes.