50results about How to "Efficient mineralization" patented technology

The invention relates to a method for degrading organic pollutants in water by gradient ozone catalytic oxidation, and relates to a gradient ozone catalytic oxidation combination method for degrading organic pollutants in water. By the method, the problem that the conventional advanced oxidation technology has defects during individual use, the problem that the organic pollutants in the water cannot be removed efficiently, the problem that the influence of the pH value and temperature of the water on the method is large, and the problem that high-toxicity byproducts are formed are solved. In the method, water treatment is realized by combining two or three of a process for treating O3 individually, an enhanced catalytic oxidation process for O3 and an O3/ultraviolet (UV) process sequentially. By the reasonable optimizing and gradient combination of the three treatment modes, the method is suitable for wide pH values and a wide temperature range, the pollutants with intermediate toxicity are controlled to be formed, the toxicity of the pollutants is reduced, the pollutants in the water is degraded efficiently and completely, and the content of oxidative species in effluent is controlled. An efficient oxidation treatment effect is kept at low temperature, and the generation of bromate, nitroso dimethylamine, chlorate, perchlorate, iodate and periodate can be controlled greatly.

Process of reducing organic content of brine which includes subjecting a brine solution containing an organic content to an electrochemical process for a sufficient period of time and at a sufficient voltage to reduce the organic content of the brine to obtain a reduced organic content brine. Also provided is a process for reducing organic contamination of brine in a chemical process comprising subjecting a brine stream of the chemical process to electrochemical oxidation to obtain a reduced organic content brine stream.

The invention relates to a method and equipment for cross backflow two-stage double-expansion granular sludge treatment of coking wastewater. The method comprises the following steps: introducing the coking wastewater to a first-stage double-expansion granular sludge reactor and degrading the coking wastewater to produce first-stage treated water; delivering a part of the first-stage treated water to a first-stage aeration backflow column and the other part of the first-stage treated water to a second-stage reactor directly; aerating the treated water which enters the first-stage aeration backflow column, allowing a part of the aerated water and return water of second-stage treatment mixed directly and flow to the first-stage reactor, and making the part of the aerated water and the aerated water of the second-stage treatment mixed and flow into the second-stage reactor; degrading the treated water which enters the second-stage reactor to produce water of the second-stage treatment, directly discharging a part of the water of the second-stage treatment, and making the other part of water of the second-stage treatment flow into a second-stage aeration backflow column; and aerating other part of the water of the second-stage treated treatment, and returning part of the aerated water of the second-stage treatment to the second-stage reactor, and returning the other part of the aerated water of the second-stage treatment to the first-stage reactor as direct return water of the second-stage treatment. The treatment method and equipment can realize the simultaneous efficient removal of COD and ammonia nitrogen from the coking wastewater.

Ceramic products possessing antisepsis and water mineralization and activation functions, and its preparation method and uses, wherein the ceramic product is prepared from the following ingredients (by weight ratio): montmorillonite 25-60 parts, diatomite 10-30 parts, aluminum oxide 5-20 parts, silicon oxide 3-15 parts, calcium carbonate 15-45 parts, multifunctional health ceramic material 5-20 parts, adhesive 9-15 parts through proportioning, disintegrating, mixing, blank making and sintering.

The invention discloses a selective flocculation-column flotation recovery method and system of micro-fine particle molybdenum cleaner tailings. The method includes the following steps that: a dispersing agent and a collecting agent are added, so that first stirring and pulp conditioning is performed, and therefore, mineral particles can be fully dispersed, and the surface hydrophobicity of target mineral particles can be improved; a flocculating agent and a foaming agent are added, so that second stirring and pulp conditioning is performed, and therefore, the target mineral particles can be flocculated selectively; the cyclonic-static fine bubble floatatation column is utilized to perform copper-molybdenum mixed floating, and a roughing-concentration-scavenging floatation process is adopted, and as a result, copper-molybdenum mixed floated concentrates and tailings can be obtained; an inhibitor is added in the copper-molybdenum mixed floated concentrates, so that third stirring and pulp conditioning is performed; and the cyclonic-static fine bubble floatatation column is utilized to perform copper-molybdenum separation, and a roughing-concentration floatation process is adopted, so that molybdenum concentrates and copper concentrates can be obtained. According to the selective flocculation-column flotation recovery method and system of micro-fine particle molybdenum cleaner tailings of the invention adopted, two kinds of micro-fine particle separation ways, namely, selective flocculation and column flotation, are adopted to recover molybdenum and copper in molybdenum concentrates and tailings, and therefore, the comprehensive utilization rate of mineral resources can be improved, and the selective flocculation-column flotation recovery method and system have excellent economic benefits and social benefits.

The invention relates to a method for recovering a low-concentration calcite type fluorite tailing containing a mica, and belongs to an efficient recovery method for comprehensive utilization of mineral resources. The method comprises the following steps that a swirling flow-static microbubble flotation column system is adopted, wherein the swirling flow-static microbubble flotation column systemcomprises a stirring barrel, a feeding pump, a feeding port, a flotation column, a concentrate port, a bubble generator, a circulating pump, an electric valve and a tailing port; a on-site low-concentration fluorite tailing containing the mica is directly sent into the stirring barrel as raw ore pulp, firstly, high-speed shearing and stirring pretreatment is carried out through the stirring barrel, then dispersant, inhibitor and collector are sequentially added according to the mass ratio to carry out stirring and size mixing, and then a mixture is sent into the flotation column from the feeding port through the feeding pump to be directly sorted and recovered, concentrate floats upwards and flows out from the concentrate port, the tailing flows out from the tailing port under the action of the electric valve, and thus the fluorite tailing can be quickly and effectively recovered. The problems of low utilization rate of an existing tailing pond, long process flow, high cost, poor separation efficiency, and the flocculation water pollution existing in tailing recovery are solved.

The invention provides an electrocatalytic coupling advanced oxidation system. The system can degrade organic pollutants into carbon dioxide and the carbon dioxide is synchronously electrocatalytically reduced to a hydrocarbon. In the catalytic system, three-dimensional hexagram-shaped Co3O4 and nano-sheet stack flower-shaped CuO are respectively used as an anode material and a cathode material, and the two electrode materials are prepared by a solvothermal method. In the three-electrode system electro-catalytic process, the Co3O4 electro-anode can thoroughly mineralize p-nitrophenol to CO2 and H2O, and the CuO electro-cathode can synchronously reduce the generated carbon dioxide into the useful hydrocarbon. When the additionally-applied bias voltage is 0.8V vs Ag/AgCl, the material has anoptimal catalytic effect, the removal rate of the p-nitrophenol can reach 98% or more, and the yields of methanol and ethanol reach 49.145 micromol/L/h and 20.475 micromol/L/h, respectively.

The invention discloses a photocatalyst and a preparation method and an application thereof. The photocatalyst is a mesoporous zeolite material loaded with iron ions, and the iron ions lie in the skeleton position and/or mesoporous channels of the mesoporous zeolite. The photocatalyst is prepared by using ion exchange method or insitu doping method to load the iron ions in the skeleton and/or the mesoporous channels of the mesoporous zeolite. The photocatalyst provided by the invention can efficiently decolor, degrade and mineralize organic dyes in ultraviolet lights, and can efficiently decolor, degrade and mineralize organic dyes in visible lights, thus the photocatalyst has strong applicability and has important meaning in practical application. In addition, the photocatalyst has good stability, can be recycled, and can be prepared and processed simply and practicably, thus the waste water treatment cost can be greatly reduced, the industrial requirements of scale and economy of the waste water treatment are satisfied, and the photocatalyst has significant effect and application values.

A porous titanium ozone aerator with ozone heterogeneous catalysis and electrocatalytic functions is disclosed, and the porous titanium ozone aerator comprises a porous titanium substrate and a catalytic layer loaded on the substrate. The catalyst layer is an oxide of Ti, Mn, Ce, Cu, Fe, Ni, Sn, Sb, Pb and the like or a composite of the metal oxides, and the oxide morphology can be nanoflowers, nanowires, nanorods and nanotubes. The porous titanium ozone aerator gives ozone ozone heterogeneous catalysis and electrocatalysis synergistic catalysis capability, and can achieve efficient catalytic reaction of gas, solid and liquid three phases of pollutants in the aerator to reach the object of high mineralization and removal of target pollutants. The porous titanium ozone aerator is used for drinking water treatment, wastewater treatment and other occasions using the ozone, and has the characteristics of strong oxidation ability, fast reaction speed, stable treatment effect, long service life, low investment, wide application scope, and the like, and has good application prospects.

The invention discloses a collophanite dressing technology. The treatment technology comprises: dressing phosphoric ore pulp by an ore dressing device, and respectively concentrating concentrate pulp and tailing pulp, obtained by ore dressing, so as to obtain phosphoric concentrate and tailing. Ore dressing verification is sequentially carried out medium and low grade phosphoric ore by the treatment technology. Superior phosphoric concentrate containing 31-33% of P2O5 is obtained through treating low-grade phosphoric ore containing 15-20% of P2O5. Superior phosphoric concentrate containing 32-35% of P2O5 is obtained through treating medium-grade phosphoric ore containing 25-27% of P2O5. The removal rate of MgO is 90%, and the removal rate of R2O3 (Fe2O3 and Al2O3) is 80-90%. The chemicals are nontoxic and harmless, are easy to degrade in life, are environment-friendly and meet environment protection requirements.

The invention belongs to the technical field of sewage treatment, and particularly relates to a method for removing degradation-resistant organic pollutants in water by enhanced ionization irradiation. The method comprises the following steps: uniformly mixing wastewater containing organic pollutants with a certain amount of MOF or derivative materials thereof, and carrying out ionization irradiation treatment. The method is high in irradiation efficiency and can be carried out at normal temperature; the MOF material can be repeatedly used; and the method can be applied to treatment of urban sewage plant effluent, pharmaceutical wastewater, dye wastewater and other degradation-resistant industrial wastewater.

The invention relates to the field of organic wastewater degradation, in particular to an electrocatalysis-ozone-membrane filtration three-in-one wastewater treatment device and process. The invention relates to an electrocatalysis-ozone-membrane filtration three-in-one cathode membrane assembly. The cathode membrane assembly comprises a microporous multichannel tubular conductive ceramic membrane, and an upper end cavity and a lower end cavity which are formed by a sealing material; the number of channels is more than or equal to 2, at least one channel with a sealed upper end and one channel with a sealed lower end are arranged, and the channel with the sealed upper end and the channel with the sealed lower end are adjacently arranged; a water outlet is formed in the upper end cavity; and an air inlet is formed in the lower end cavity. According to the membrane assembly, deep oxidation of ozone can be limited near the cathode, and the concentration of OH near the cathode is higher through ozonation reaction with H2O2 generated by electric reduction of O2, so that the sewage treatment effect is better, and the ozone utilization rate is higher.

The invention discloses a slurry mixing and stirring tank for fine-grain mineral flotation. The slurry mixing and stirring tank comprises a stirring tank body (1), baffle plates (2), a frequency adjusting motor (4) and a stirring shaft (5); the baffle plates are uniformly distributed on the inner wall of the stirring tank body; the frequency adjusting motor is mounted at the top of the stirring tank body; an output shaft of the frequency adjusting motor is connected with the stirring shaft; a mixing impeller (6) is mounted at the bottom end of the stirring shaft; a feed pipe (11) is arranged on the lower side wall of one side of the stirring tank body; an overflow pipe (12) is arranged on the upper side wall of the other side of the stirring tank body; one ends, near the stirring shaft, of the baffle plates are cylindrical; the other ends, near the side walls of the stirring tank body, of the baffle plates are straight plate-shaped; rectangular gaps are formed in the straight plates of the baffle plates; and a plurality of turbine generators (3) are uniformly distributed between the stirring shaft and the baffle plates. The slurry mixing and stirring tank intensifies the effects of the baffle plates by improving accessories of the baffle plates, and the turbine generators are used to generate streamwise vortexes by using a flow pattern in the stirring tank, so that the reinforcement of shearing strength in the stirring tank and the enhancement of the turbulent effect are achieved, and the high-efficiency mineralization is realized.