32results about How to "Continuous degradation" patented technology

The invention relates to a preparation method of a diatomite-loaded N-doped nanometer TiO2 photocatalysis material, which belongs to the technical fields of mineral materials and photocatalysis. The method comprises the following steps of: adding water and concentrated hydrochloric acid into diatomite mineral powder, stirring, pulping, and adding a TiCl4 aqueous solution and an NH4Cl aqueous solution, adding an ammonia aqueous solution for adjusting the pH value of a reaction liquid, and performing a hydrolytic precipitation loading and liquid phase N doping reaction on NH<4+> serving as a nitrogen source; and filtering a reaction product, washing, drying, and calcining and crystalizing in a nitrogen atmosphere to obtain the diatomite-loaded N-doped nanometer TiO2 photocatalysis material. According to the diatomite-loaded N-doped nanometer TiO2 photocatalysis material prepared with the method disclosed by the invention, the photocatalysis performance of nanometer TiO2 under visible light can be improved remarkably, a continuous degradation function on formaldehyde is realized, and the degradation rate of formaldehyde is over 86 percent within 24 hours under the condition of visible light.

The invention discloses an air purification device and method capable of continuously degrading indoor VOCs. The air purification device comprises a dehumidification unit, an inlet air inducing unit, a first purification and degradation chamber, a second purification and degradation chamber, an outlet VOCs monitor and control unit and an exhaust unit. According to the air purification device capable of continuously degrading the indoor VOCs, VOCs gas adsorption degradation and activated carbon desorption regeneration are integrated, and integrated shell mounting is easy; the air purification device has the beneficial effect of being convenient to move, an adsorbing material does not need to be replaced frequently, the consumption cost of an activated carbon adsorbing material is greatly reduced, and the service life of the activated carbon adsorbing material is prolonged; and a dehumidification pretreatment method is adopted, the efficiency that activated carbon purifies and adsorbs the VOCs later is greatly improved, the air purification effect is greatly improved, and the good market potential is achieved.

The invention discloses a microwave catalyst for degrading organic wastewater and a catalytic oxidation degradation method thereof. The catalyst is of a porous structure and can be used for absorbing microwave, wherein in the adsorption of microwave, oxygen or air is introduced into the catalyst in the presence of water molecules so as to generate a large quantity of OH free radicals under microwave irradiation. By adopting the technical scheme, the microwave catalyst greatly improves the degradation efficiency, greatly shortens the processing time, is easy and feasible to operate, low in investment and operation costs, small in occupying area, complete in degradation, wide in concentration range of degrading the organic wastewater, easy for industrial production and suitable for treatment of organic wastewater in the industries of printing and dyeing, paper making, chemical industry, pharmacy and the like, and can perform continuous scale treatment; and moreover, the secondary pollution is avoided.

The invention provides an integrated water treatment system for treating both water for seawater recirculating aquaculture and tail water. The integrated water treatment system comprises a sewage collection tank, a physical filtering device, an air floating pool, an electrode-suspended filler coupled biofilter treating unit, and an ozone-ultraviolet combined pathogenic microorganism killing unit which are connected in sequence, wherein the sewage collection tank, the physical filtering device, the air floating pool, the electrode-suspended filler coupled biofilter treating unit, the ozone-ultraviolet combined pathogenic microorganism killing pool are all connected with a sludge concentration-dehydration device, and the ozone-ultraviolet combined pathogenic microorganism killing pool is also connected with a culture pond. The integrated water treatment system of the invention has the characteristics of high water treatment efficiency and continuous maintenance of the high water quality of an aquaculture system, and the water circulation utilization rate of the system can reach 95% to 98%; and the integrated water treatment system can fully meet the demand for healthy culturing of cultured objects, has a tail water treatment function, and allows the tail water to be discharged after reaching the standard.

The invention discloses a preparation method for an iron-ferrous sulfide composite. The method comprises the steps that elemental sulfur powders and iron sulfide powders are mixed at a a mass ratio of 1: 5-60 or pyrite powders and micron-grade iron powders are mixed at a mass ratio of 1: 5-60; the obtained mixed raw materials are put into a ball mill tank of a ball mill; the ball mill tank is filled with grinding media, and the ball mill tank is in a vacuum environment or inert gas atmosphere; and the ball mill is started, the grinding speed is 400-4000 rpm, the grinding time is 2-30 hours, the grinding media and a product are separated after grinding, and the iron-ferrous sulfide composite is obtained. The grain size of the prepared iron-ferrous sulfide composite is below 10 micrometers. The preparation method is simple, the raw materials are low in cost, and poisonous and harmful dangerous chemicals are not used or generated. The prepared iron-ferrous sulfide composite can efficiently purify chlorine-contained organic pollutants and heavy metals in water, and is especially suitable for in-situ repairing of polluted underground water.

The invention provides a photocatalyst composition CNB-BiVO4. According to the photocatalyst composition CNB-BiVO4, nitrogen-containing organic matter serves as a raw material, boron-doped graphite-phase carbon nitride (abbreviated as CNB) is prepared through a hydrothermal method, a boron-containing compound and a vanadium-containing compound serve as raw materials and react in an acidic solution, then solids obtained through reaction are calcined to obtain BiVO4, and then the prepared CNB and the BiVO4 are mixed and prepared into the photocatalyst composition CNB-BiVO4 through a hydrothermal method. The prepared photocatalyst composition has a good catalytic degradation effect on organic dye and particularly azo type organic dye under ultraviolet light and can be used for treating sewage containing the organic dye.

The invention relates to a bio-contact oxidation filter sedimentation tank which mainly comprises a tank body, a filter system, a water collection system, an aeration system and other facilities, wherein the common bio-contact oxidation tank, aeration tank, sedimentation tank and filter tank in sewage treatment are organically combined. The sewage is subjected to biochemical degradation and filter sedimentation in the facilities and then enters next process or is discharged after reaching the standard; and the settled sludge flows back or is removed. Through the invention, the treatment efficiency of the sewage treatment facilities can be improved, the energy consumption is lowered, and the investment and operation cost are reduced.

The invention belongs to the technical field of organic wastewater treatment, and particularly relates to an organic wastewater treatment device and system by utilizing solid adsorbent and low-temperature plasma desorption. The organic wastewater treatment device is composed of multi-tube parallel coaxial reaction chambers, a metal ground electrode electromagnetic shielding housing, an anode connecting ring, an insulation bracket and the like. The organic wastewater treatment system comprises the organic wastewater treatment device, a high-voltage nanosecond pulse power supply, an air pump, a water pump, an oxygen cylinder, a water storage tank, a gas phase detector and a water quality detector. According to the organic wastewater treatment device and the organic wastewater treatment system, in the condition that other chemical medicines are not introduced, a high-voltage nanosecond pulse technique and low-temperature plasma formed by dielectric barrier discharge are used as technical cores, the adsorption characteristics of the solid adsorbent on organic pollutants in wastewater and the electrical characteristic of easy gas discharge of an interior porous structure are utilized, electric energy is used as unique operating cost, and degradation treatment on the organic wastewater is greenly and efficiently performed. A plurality of reaction chambers are alternately used, so that the industrial actual demand of continuous treatment of the organic wastewater is achieved.