72results about How to "No secondary pollutants" patented technology

The invention discloses a method for producing methane from kitchen waste by two continuous anaerobic fermentation steps. The method comprises the following steps: 1) crushing and beating the kitchen waste; 2) adding water into the beaten kitchen waste, and transferring the kitchen waste added with the water to a first continuous stirred tank reactor (CSTR) anaerobic fermentation tank for acidification hydrolization; and 3) transferring the fermented materials subjected to the acidification hydrolization to a second CSTR anaerobic fermentation tank for anaerobic fermentation to produce methane, wherein an anaerobic inoculum is adopted. According to the method, the kitchen waste is subjected to the acidification hydrolization at first and then is subjected to the high-temperature anaerobic fermentation to generate the methane by adopting a continuous operation way in the two anaerobic digestion processes; and the fermented materials subjected to the acidification hydrolization does not need to be subjected to solid-liquid separation, so that the problems that the kitchen waste is fast to degrade and the production of the methane is not stable in the anaerobic fermentation process are solved, and the industrial anaerobic digestion treatment of the kitchen waste can be implemented.

The invention provides a material recycling method of a waste lithium iron phosphate battery. A regenerative lithium iron phosphate material is obtained by taking a positive electrode aluminum foil sheet of the waste lithium iron phosphate battery as a raw material, performing mechanical oscillation on the positive electrode aluminum foil sheet of the waste lithium iron phosphate battery after calcination so that a positive electrode material of the positive aluminum foil sheet is separated from the aluminum foil sheet and removing redundant Li<+>, Fe<2+> and PO<4><3-> in the positive electrode material. The method is simple and easy to operate, is relatively low in energy consumption and is friendly to an environment, and no secondary pollutant is generated.

The invention discloses composite ceramsite prepared from bentonite, perlite and zeolite serving as main raw materials. The raw materials are molded, roasted at a high temperature, and scattered to form spherical or columnar porous ceramsite. The composite ceramsite has the obvious advantages that: 1, an environment-friendly product with high economic value and long service life is prepared from natural nonmetallic minerals and clay which have adsorption property and are used as raw materials, so that the aim of treating waste by using the natural minerals is fulfilled; 2, microporous ceramsite with a good structure is prepared by firing abundant natural minerals, namely the bentonite and the zeolite which have an interlayer structure and a natural pore channel structure and are used as raw materials, and micropores formed in the firing process are communicated with the natural pore channel structure and the interlayer structure, so that the prepared ceramsite has a good pore channel and high adsorption capacity; and 3, after the ceramsite is used for a certain period of time, the adsorption capacity is in a saturated state, adsorption capability is reduced, and the ceramsite can be dried and regenerated at a high temperature, so that a pollution treatment material is recycled, and secondary pollutants are not generated.

The invention discloses a recycling method of a material of a waste lithium cobalt oxide battery. A positive electrode plate of the waste lithium cobalt oxide battery is subjected to calcining processing to obtain lithium cobalt oxide powder; then the lithium cobalt oxide powder, an acid solution and a hydrogen peroxide solution are mixed and reacted in an ultrasonic wave environment; and the obtained reaction liquid is added with oxalic acid and sodium carbonate in sequence to obtain lithium and cobalt precipitates. The recycling method of the material of the waste lithium cobalt oxide battery is simple and easy to operate, relatively low in energy consumption, environment-friendly, and does not generate secondary pollutants.

The invention discloses a niobate photocatalyst Bi3Nb17O47 and a preparing method thereof, and belongs to the field of inorganic photocatalytic materials. A high-temperature solid state method and a sol-gel method are adopted for the novel bismuth niobate photocatalytic material. The preparing method is simple and low in cost. In addition, the prepared material is uniform in particle size, good in chemical stability and photocatalytic performance and capable of effectively degrading organic pollutants under irradiation of ultraviolet light and is a novel photocatalytic material with potential.

The invention discloses a water glass used sand regeneration method. The water glass used sand regeneration method comprises the steps that pneumatic impact equipment is adopted for pretreatment of the surface of water glass used sand; an addition agent is added in the pretreated water glass used sand, a mixture is obtained, and then the mixture is roasted; and roasted sand particles are subjectedto grinding treatment. The water glass used sand regeneration method combines the advantages of a mechanical method regeneration technology and the advantages of a hot method regeneration technology,the addition agent is added in the hot method process, the removal effect of a Na2O inertia film on the surface of the water glass used sand is greatly improved, and the removal rate of the Na2O inertia film on the surface of the water glass used sand reaches 90% or above; and the obtained regenerated sand can serve as single sand to be used, secondary pollutants cannot be generated, and meanwhile the resource utilization rate is improved.

The invention relates to smoke purifying technology and aims at providing a method and a device for purifying high-temperature smoke containing persistent organic pollutants. The method comprises the following steps: reducing the temperature and cooling the high-temperature smoke containing the persistent organic pollutants by a primary spray tower and a secondary spray tower which are connected in series, enabling the condensed persistent organic pollutants to enter a sedimentation tank along with spraying solution; enabling wet gas after being sprayed to enter a dehumidifier, enabling the dehumidified gas to enter multiple stages of plasma reactors which are connected in series, and degrading the residual persistent organic pollutants in the gas. According to the method, the high-temperature smoke containing the persistent organic pollutants can be processed effectively; the method is suitable for treating tail gas which is large in air volume, high in dust content and contains the persistent organic pollutants, and particularly suitable for processing tail gas generated in the process of thermal desorption of solid wastes polluted by the persistent organic pollutants, and more than 95% of persistent organic pollutant removing rate can be realized. The related device has low energy loss and water consumption, does not generate secondary pollutants easily, and is simple in structure and convenient to install and maintain.

The invention discloses preparing methods and applications of a visible-light-responsive bismuth oxysalt photocatalyst Bi<16>Te<5>O<34>, and belongs to the field of inorganic photocatalytic materials. The catalyst is prepared by a sol gel method and a co-precipitation method respectively. The preparing methods are simple and low in cost. The photocatalytic material prepared by the methods has uniform granularity, good chemical stability and excellent photocatalytic performance, can effectively degrade organic pollutants under visible light irradiation, and has a wide application prospect in the fields of sewage treatment and environment protection.

The invention relates to a method for realizing nickel recovery in electroplating sludge, which comprises the following steps that: heavy metal contained in the electroplating sludge is leached by mixed acid; the pH value is regulated, compound extracting agents are added, and separation of nickel from other coexistence metal and the nickel enrichment are realized; and sulfuric acid is added into the nickel-containing extraction liquid for carrying out reverse extraction, the nickel resource recovery is carried out, and the reuse of the compound extracting agents is realized. In the method, a compound extraction system is adopted for recovering valued metal nickel in the electroplating sludge, the metal resource utilization rate is high, the product addition value is high, the method belongs to a clean production process, no new three-waste is generated, and in addition, the production cost is relatively low.

The invention discloses a volatile organic waste gas biological treatment system comprising an adsorption concentration device, a biodegradation device and a PLC control unit, wherein the adsorption concentration device comprises a molecular sieve rotation wheel; an adsorption area, a regeneration area and a cooling area which rotate in sequence are arranged in the circumference direction of the molecular sieve rotation wheel; the inlet side of the adsorption area is connected with an adsorption fan; the outlet side of the adsorption area is communicated with a high-altitude chimney; high-temperature regeneration gas is arranged in the regeneration area; the outlet side of the cooling area is connected with a heat exchanger; one side of the heat exchanger is connected with the biodegradation device; the other side of the heat exchanger is connected with a heater; the heater is communicated with the regeneration area and backflows to be connected to the heat exchanger; the biodegradation device comprises a desorption fan, a regeneration liquid storage tank, and a nutrient liquid storage tank; the regeneration liquid storage tank is internally provided with a biodegradation rotation wheel; and the desorption fan is communicated with the biodegradation rotation wheel by a pipeline. The volatile organic waste gas biological treatment system disclosed by the invention is easy to operate, wild in reaction condition, low in running cost, free of secondary pollutants, high in removing efficiency, high in degree of automation, and good in safety performance, and the waste gas removing rate can be 98% or more.

The invention provides a flame-retardant polymer material and a preparation method thereof. The flame-retardant polymer material comprises the following components: polymer resin, a flame-retardant catalyst, a flame retardant, a lubricant, hydroxyethyl cellulose, propylene carbonate, toluene diamine and tetrabromobisphenol. The preparation method of the flame-retardant polymer material provided bythe invention is simple, the raw materials are easy to obtain, the preparation cost is low, and the flame-retardant polymer material is suitable for industrial large-scale popularization and production.

The invention relates to an oil-based drilling waste supercritical treatment system. The oil-based drilling waste supercritical treatment system mainly comprises an extraction unit, a separation unit,an extractant recovery unit and a corresponding control unit. The extraction unit comprises an extraction kettle, an extractant storage tank, a metal diaphragm compressor, an extractant buffer tank,a pre-extraction cooler, a waste storage tank and a screw pump. The separation unit comprises an extraction kettle outlet pipeline switching valve group, a filter, a first-stage pressure reducing valve group, a first-stage separation heater, a first-stage separation kettle, a second-stage pressure reducing valve group, a second-stage separation heater and a second-stage separation kettle; the extractant recovery unit includes a first residual extractant recovery line, a second residual extractant recovery line, an extractant decompression recovery line, and a solute collection line. The systemrealizes the continuous, high-efficient and environmental protection treatment of oil-based drilling waste with high oil content, high water content, high solid content and low fluidity by adjustingand switching the corresponding valves on the pipeline.

The invention relates to a technology for treating roasted eel industrial sewage. The technology is characterized by comprising the following steps of: (A), oil isolated primary precipitation treatment; (B), anaerobic decomposition treatment; (C), primary contact oxidation treatment; (D), primary standing return sludge precipitation treatment; (E), secondary contact oxidation treatment; (F), sandfiltration treatment; (G), secondary standing left sludge precipitation treatment; and (H), multistage precipitation treatment. A system for treating the roasted eel industrial sewage is characterized by comprising oil isolated primary precipitation equipment, anaerobic or anoxic acidification equipment, primary contact oxidation equipment, primary standing return sludge precipitation equipment, secondary contact oxidation equipment, sand filtration equipment, secondary standing left sludge precipitation equipment, multistage supernate tanks, left sludge precipitation equipment and control equipment for controlling the system. The technology and the system for treating the roasted eel industrial sewage can effectively degrade organic substances.

The invention discloses a cyclic regeneration method of a town sewage treatment medicament, and the cyclic regeneration method comprises the following steps of: (1) calcining the town sludge, and then smashing into absolute dry aluminum ash:; (2) adding water and concentrated sulfuric acid to the absolute dry aluminum ash for sufficient mixed reaction; (3) adding a flocculant to a mixed reaction system obtained from the last step for flocculation, and then carrying out filter pressing to obtain filter liquor and a filter cake; (4) washing the filter cake, and merging the filter liquor obtained after washing and the filter liquor obtained from the last step; and (5) adding a heavy metal collecting agent to the merged filter liquor obtained from the last step to remove heavy metals contained in the filter liquor, sufficiently standing, and regulating the aluminum content of an obtained supernatant to obtain liquid industrial aluminum sulfate with aluminum oxide content more than or equal to 7.8 percent by weight. The cyclically regenerated town sewage treatment medicament is applied to sewage disposal; the cyclic regeneration method disclosed by the invention can be used for preparing the liquid aluminum sulfate with industrial application value through a simple process by taking the town sludge as a raw material; and the process is environmental-friendly without generating secondary pollutants and accords with the national sustainable development strategy.

The invention discloses a method for preparing a heavy metal soil remediation material from coal gangue. The method comprises the following steps: S1, raw material testing; S2, raw material crushing;S3, proportioning; S4, mixing; S5, molding; S6, thermal activation; S7, quenching; S8, drying; S9, crushing; S10, amino acid immobilization; and S11, secondary drying. According to the heavy metal soil remediation material, through thermal activation, the activity of powder is high, the powder can be replaced with heavy metal ions, and thus, the heavy metal ions in soil can be removed; active silicate can react with the heavy metal ions in the soil, so that the heavy metal ions are precipitated after being combined with silicate; mesopores and micropores which are generated by thermal activation can be used as carriers of amino acid or guanidinoacetic acid production mother liquor, after the remediation material is applied to the soil, amino acid is chelated with the heavy metal ions to form amino acid chelates, and the amino acid chelates are attached to the surface of the powder, so that the heavy metal ions in the soil are removed.

The invention discloses a method for preparing a mesoporous material from coal gangue and a catalyst carrier prepared from the coal gangue. The method comprises the following steps of S1, raw materialtesting; S2, raw material crushing; S3, burdening; S4, mixing; S5, molding; S6, thermal activation; S7, quenching; S8, drying; S9, secondary crushing; S10, acid activation; S11, slag-liquid separation; S12, secondary drying; and S13, tertiary crushing. Through the mesoporous material provided by the invention, the coal gangue is changed into the valuable from the waste; moreover, mesopores and micropores are formed by powder composed of the coal gangue; metallic oxides in calcinated clinker are converted into metal ions to be dissolved from the clinker through acidification, and accordingly,more mesopores are formed. The powder has large specific surface area and provides the carrier for adhesion of a catalyst.

The invention discloses concentrated microwave electrodeless ultravioletcatalysis waste gas treatment equipment. The equipment comprises an air inlet fan, a dedusting module, a waste gas concentrationmodule, a waste gas treatment unit, a filtering module, an ozone treatment module and a centralized exhaust opening, and the output end of the air inlet fan is connected with the input end of the dedusting module, wherein the output end of the dedusting module is connected with the input end of the waste gas concentration module; the output end of the waste gas concentration module is connected with the input end of the waste gas treatment unit and the centralized exhaust opening separately, wherein the output end of the waste gas treatment unit is connected with the input end of the filtering module; the output end of the filtering module is connected with the input end of the ozone treatment module, wherein the output end of the ozone treatment module is connected with the centralized exhaust opening. Waste gas is concentrated by 5-50 times through the waste gas concentration module, thus the amount of air entering the waste gas treatment unit is reduced, the waste gas staying timecan be prolonged by 5-50 times under the condition of not increasing the size of the waste gas treatment unit, and thus the treatment effect is improved by a large margin.

The invention discloses a novel device for treating industrial wastewater organic matters. The device consists of an ozone generator, an ozone buffer tank, a hydrogen peroxide storage tank, a hydrogen peroxide pump, a reactor, a tail gas treatment device, an air inlet, a liquid inlet, an air exhaust hole, a water inlet and a water outlet, wherein the ozone generator is connected with the ozone buffer tank; the ozone buffer tank is connected with the reactor through the air inlet; the hydrogen peroxide storage tank is connected with the hydrogen peroxide pump; the hydrogen peroxide pump is connected with the reactor through the liquid inlet; the water inlet is arranged at the lower end of the reactor; the air inlet and the liquid inlet are arranged at the lower end of the reactor; a catalyst layer is arranged at the lower part of the reactor, and the tail gas treatment device is arranged at the upper part of the reactor; the air exhaust hole is formed in the lower part of the tail gas treatment device; an upper cover is arranged at the lower end of the air exhaust hole; aeration heads are arranged around the back part of the air inlet at the bottom part of the reactor; the reactor is provided with three water outlets.