347 results about "Waste generation" patented technology

The invention relates to an ultraviolet-curable water-based colored paint composition which comprises water-based oligomer containing at least one unsaturated double bond, a water-based medium, a photoinitiator, an optional water-based thermoplastic resin and pigments. The water-based paint composition provided by the invention can be used for obtaining a high-performance coating with abundant colors in a one-time construction mode. Compared with the traditional two-layer or three-layer application mode, the invention enhances the production efficiency, reduces the energy dissipation, lowers the preparation cost, and has the advantages of less waste generation, low content of volatile organic compounds, and low environmental pollution.

A system and method for converting a high free fatty acid grease feedstock to biodiesel. The process comprises a glycerolysis reaction to convert free fatty acids to glycerides and a base catalyzed transesterification reaction to produce fatty acid methyl esters and glycerin in the absence of solvents. In preferred embodiments, both glycerin and methanol are recycled. The process can process a feedstock containing up to 100 percent free fatty acid content to produce biodiesel and glycerin with minimal waste generation.

A synergistic composition and method is provided for controlling odor from waste products. The composition comprises a combination of magnesium hydroxide and a sulfide-consuming compound. The method includes adding a sufficient amount of the composition to a waste stream to provide sufficient sulfide-consuming compound to effect immediate removal of sulfide. The composition incorporates a pH elevating and buffering compound, which both increases and buffers the pH. The increased pH serves to reduce both the volatile sulfide species and the volatile fatty acid (VFAs) species. The elevated pH also promotes the growth of naturally occurring bacteria which metabolize the sulfide to an innocuous form. Finally, addition of the composition drives the pH into a range where the growth of sulfide producing bacteria is inhibited. The mixture has surprisingly been found to be synergistic with respect to both control of chemical species that produce odors and corrosion of metals commonly found in sludge dewatering equipment.

The invention discloses a method for preparing nano copper conductive ink, which can be applied in the field of printing electronic technology, in particular ink jet printing technology. The preparation method comprises the following steps of: dissolving copper salt and protective agent into a solvent, heating and stirring the solution, adding a small amount of alkali solution to adjust the pH ofthe solution to between 7 and 10, dripping a reducing agent into the solution, continuously stirring the solution to react for 30 to 60 minutes, and then cooling the reaction solution to room temperature to obtain nano copper dispersion; performing centrifuging, washing and vacuum drying at room temperature on the nano copper dispersion to obtain nano copper granules; and dispersing the nano copper granules into an organic solvent, and ultrasonically treating the solution to obtain the nano copper conductive ink. The method solves the problems of complex preparation process and long preparation period in the prior art, has the advantages of simple and convenient operation, low production cost, short flow and no harmful waste generation, and realizes the goals of environmental protection and economy; and the prepared nano copper conductive ink has good dispersion property and high stability.

Heavy metal bearing products during production, processing and/or handling, and/or in landfills, storage or retention areas are stabilized prior to the generation or management as a waste by applying heavy metal stabilizing agents into the product stream thus avoiding complex and costly processing and treatment of waste under hazardous waste regulations.

The invention relates to a method for preparing phosphatidylserine abundant in polyunsaturated fatty acid and belongs to the technical field of bioengineering. The method is characterized by comprising the following steps of: firstly, catalyzing ester exchange reaction between phosphatide and polyunsaturated fatty acid ester by utilizing one or a mixture of phosphatidase A and lipase to generate phosphatide abundant in polyunsaturated fatty acid; and then catalyzing phosphor-transfer esterification reaction between the phosphatide abundant in the polyunsaturated fatty acid and L-serine by utilizing phosphatidase D to generate the phosphatidylserine abundant in the polyunsaturated fatty acid. The method has the advantages of no discharge of waste water, good product quality, no solvent residue, safe process operation, few reaction byproducts, no waste generation, cost reduction, simple production process and easy realization of scale production because of utilizing two enzymes to perform sub-step catalysis and perform reaction in the same reactor, and completing the reaction process in a non-solvent system. Therefore, the invention provides a good and feasible method for preparing the phosphatidylserine abundant in the polyunsaturated fatty acid.

The “MOBILE PLANT FOR SELF-SUSTAINABLE BIODIESEL PRODUCTION AND MOBILE PROCESS FOR BIODIESEL PRODUCTION” characterized by a compact equipment arrangement for the biodiesel production in a way intended to reduce waste generation and, additionally, allow reuse/application of some of them; it is organized and arranged over a chassis with axle and wheels that can be attached and taken to various locations, presents a self-sustainable format to use its own fuel to generate electricity to supply the entire plant, if necessary.

The invention discloses a preparation method of 4-acetoxyl-2-methyl-2-butylenoic aldehyde. In the traditional method, the yield is lower, the waste water amount is larger, and the requirements on equipment are higher. The preparation method comprises the following steps of: reacting 2-halogenated ethanol as a raw material with an acylating agent to obtain halogenated ester; then preparing phosphonate ester through the Arbuzov reaction between the halogenated ester and triethyl phosphite; preparing glutaraldehyde acetal through the Wittig-Horner reaction between the phosphonate ester and 1,1-dimethoxy acetone under the action of alkaline, and carrying out deprotection on the glutaraldehyde acetal under the acidic condition to obtain glutaraldehyde, namely, the 4-acetoxyl-2-methyl-2-butylenoic aldehyde. The invention has less three waste generation, good reaction selectivity, less by-products and higher yield.

The prodn. process are: pretreatment, adsorpting adsorpting para-nitrophenol in waste water, recovering and utilizing sodium chloride, deadsorpting obsorbed para-nitrophenol. The outstanding characteristic is that recovering ratio for nitrophenol is approach 100 percent, the recovered nitrophenol is reused by being send back to prodn process, large quantity of sodium chloride in waste water is used to produce caustic soda and hydrochloric which can be circulating used.

This invention relates to a producing technology for pure KCl, which takes KCl with the purity below 98% as the raw material characterizing in including steps of dissolving in fresh water, sedmentation and filtration, concentrating and removing trash, reducing the temperature and crystallizing and separation of liquid and crystals to get pure KCl over 99%, another method includes: dissolving in fresh water, sedmentation and filtration, reducing the temperature and crystallizing and separation of liquid and crystals and the whole production applies total blocking out continuous mode.

Disclosed is a process for recovery of uranium from a spent nuclear fuel using a carbonate solution, characterized by excellent proliferation resistance of preventing leaching of transuranium element (TRU) nuclides such as Pu, Np, Am, Cm, etc. from the spent nuclear fuel as well as environmental friendliness of minimizing waste generation, wherein a highly alkaline carbonate solution is used to separate uranium alone from the spent nuclear fuel.

The invention discloses a power lithium ion battery all metal recycling and cyclic utilizing method. Waste lithium ion batteries serve as raw materials, the disassembling-screening and roasting procedures are adopted for separating battery pole powder from other parts in the batteries, then, acid leaching is conducted, and leaching liquid containing cobalt, nickel, manganese and lithium is obtained; through extraction, separation and purification of cobalt, nickel, manganese and lithium are achieved, battery-level cobaltous sulfate, nickel sulfate and manganese sulfate are obtained, then, lithium-sodium separation is conducted, and lithium carbonate and sodium sulfate products are obtained through lithium deposition and concentration. The power lithium ion battery all metal recycling and cyclic utilizing method is green and efficient, danger waste generation is avoided, and large-scale production can be achieved. Various valuable metals are systematically recycled from the waste powerlithium batteries, according to the recycling rates, Co is larger than 95%, Ni is larger than 95%, Mn is larger than 98%, Li is larger than or equal to 94%, and the water cyclic utilization rate is larger than 95%. Nickel sulfate liquid, cobaltous sulfate liquid, manganese sulfate liquid and lithium carbonate obtained through the power lithium ion battery all metal recycling and cyclic utilizing method meet the battery level product standard.

This invention relates to a method for producing zinc alloy from zinc slag. The method comprises: heating zinc slag and aluminum to 500-600 deg.C in a smelter to completely melt, cooling to a certain temperature to adequately separate zinc-aluminum melt from floating residues, cooling the zinc-aluminum melt, processing into zinc-aluminum ingots, treating the floating residues in a double-vacuum purification furnace to obtain regenerated zinc in a crystallizer and residues kept in a material basket, mechanically separating regenerated zinc from the crystallizer, directly conveying into the smelter, melting, ingotting, collecting the residues, adding an appropriate amount of carbon powder, treating above 600 deg.C in the double-vacuum purification furnace to completely reduce volatile components (zinc and tin) in the residues, separating, recovering, and separating the final product from tailings in the crystallizer. By combining melt ingoting and vacuum distillation, the method has such advantages as low energy/material loss, little waste generation, little pollution and recycleable byproducts.

A process to produce a flowable fuel or fuel supplement from solid and/or liquid waste, such as industrial waste. A system to carry out the process includes producing from the solid and/or liquid industrial waste a solid char and vaporize liquids, recombining the char and the liquids, recovered from the wastes feed, to form a feed slurry containing solids, combining the feed slurry with additional combustible waste liquids which are added at a rate and amount to obtain a fuel slurry of specified properties, particularly specified viscosity and BTU content, subjecting the feed slurry and additional wastes to conditions of attrition in at least one attrition zone to produce a product slurry containing solids of fuel size, recovering the fuel slurry which be used as fuel in partial oxidation processes. The liquid waste may be collected as a product, particularly if they are high in organic compounds.

The invention discloses an elevator door frame profile punching and roll bending production line. The elevator door frame profile punching and roll bending production line comprises an emptying uncoiler, a punching machine tool, a roll bending molding machine, a chopping device, and an electronic control system device which are distributed in sequence in a production line direction, wherein the emptying uncoiler is positioned at the starting end of the production line and used for supporting and unfolding a steel plate strip; the punching machine tool is used for carrying out punching treatment on the steel plate strip sent by the emptying uncoiler; the roll bending molding machine is used for performing bending treatment on the steel plate strip treated through punching of the punching machine tool; the chopping device is arranged at the discharging port of the rolling bending molding machine and used for cutting the steel plate strip subjected to bending treatment of the roll bending molding machine; the electronic control system device is respectively connected with the emptying uncoiler, the punching machine tool, the roll bending molding machine and the chopping device. The elevator door frame profile punching and roll bending production line provided by the invention has the beneficial effects as follows: the electronic control system device is adopted for uniform control of the entire production line, all production devices are connected together organically, the automatic integration degree is high, the production efficiency is improved, the labor cost is reduced, and waste generation is reduced.

The invention discloses an energy-saving type multiple-effect VOCs purification reactor. The energy-saving type multiple-effect VOCs purification reactor comprise a purification device, and a filter device is arranged on the left side of the purification device; an absorption device operates under pushing of waste gas, absorption liquid is stirred, thus gas-liquid turbulence degree is improved, VOCs can be promoted to enter into the absorption liquid, the rate of the VOCs entering the absorption liquid is increased, the adsorption liquid is sprayed through a spraying mixing device, thus the adsorption liquid is mixed with the waste gas in a fogdrop mode, the waste gas is purified again, the purification effect is further improved, meanwhile the waste gas and fogdrop can be evenly mixed through the spraying mixing device, the purification effect is advantageously improved, through matching of a weighing device, a liquid placing device and a liquid level control device, the using degreeof the adsorption liquid is monitored, the adsorption liquid is replaced automatically, the problems of waste generation due to incompletion using of the adsorption liquid, and waste gas purificationeffect influenced by supersaturation of the adsorption liquid are avoided, and the practicability of the energy-saving type multiple-effect VOCs purification reactor is improved.

The present invention provides a food waste in situ treatment method, which comprises: A, carrying out solid-liquid separation on food waste; B, carrying out a biochemical treatment on the separated solid waste in a treatment bin to form an organic fertilizer master batch; C, carrying out a composting treatment on the organic fertilizer master batch to form an organic fertilizer; and D, screening the organic fertilizer. According to the present invention, the food waste treatment equipment is placed on restaurants, party and government organs, enterprises and institutions, university sites and other waste generation places, the organic domestic food waste is regularly or irregularly treated before rotting so as to reduce the waste transfer link, and the harmless in situ treatment is performed to convert the food waste into the organic fertilizer master batch so as to achieve control of the food waste from the source, such that the waste transportation cost and the landfill burning cost are reduced, and the odor generation during the waste fermentation process is reduced, wherein the whole treatment process is completely sealed.

The invention discloses organic waste solid forming fuel and a production method thereof. The production method is as follows: organic waste such as straw, and the like is crushed, is compressed and formed by a machine in an organic waste block pressing device, and is used as the fuel to be directly combusted. The combustion rate of the organic waste solid forming fuel reaches up to 90 percent and is 4 times higher than that of the traditional organic waste solid forming fuel. As a combustion manner, the organic waste solid forming fuel has the heat value close to that of coal. And the organic waste solid forming fuel basically has no pollution emission, can be used as the fuel to be widely applied to the fields of the family life and the warming, the industry boiler, and the straw organic waste generation. Compared with other processes, the organic waste solid forming fuel has the characteristics of simple production process and equipment, easy operation, strong adaptability to various organic raw materials, convenient storage and transportation, easy implementation of industrial production and massive use, and the like. The organic waste solid forming fuel is more convenient for use, and is easy to be accepted by people in towns and countryside villages.

The invention discloses a high-efficiency environment-friendly ketene dimer production technique which comprises the following steps: (1) gasifying an acetic acid water solution into acetic acid gas, mixing with a catalyst phase, and cracking in a cracking furnace at 680-698 DEG C to generate ketene gas, wherein the outlet pressure of the cracking furnace is controlled at the absolute pressure value of 2-20 KP; (2) delivering the purified ketene gas to an absorption unit with a vacuum pump, wherein the pressures before and after the pump are respectively 2-20 KP and 100-120 KP, and the temperature difference change of the absorption liquid is controlled to be less than 10 DEG C; (3) respectively sending the absorption liquid into a high temperature polymerization tank and a low temperature polymerization tank to perform primary and secondary polymerization, thereby obtaining the crude product ketene dimer; (4) carrying out vacuum rectification on the crude product ketene dimer to obtain a ketene dimer finished product; and (5) under the action of a combustion-supporting oxidizing gas medium, delivering the rectification residue to a combustion furnace to perform oxidation treatment while controlling the delivery pressure at 6-10 kgf/cm<2>. The technique has the advantages of fewer side reactions, high product yield and no solid waste generation.

The invention discloses a wall-face dry-hanging system of a large metal aluminum sheet. The system comprises a steel support (1), an aluminum sheet (2) and a plurality of support fixing devices (3), wherein the steel support (1) is fixedly arranged on a wall body (14) through the support fixing devices (3); the steel support (1) is also fixedly connected with ground (15) and a ceiling (16) through the support fixing devices (3); the aluminum sheet (2) is in limiting supporting connection with the steel support (1) through steel fasteners (4). The system overcomes the defects of poor accuracy, fire hidden trouble, serious labor consumption, high waste generation rate, low procedure efficiency and the like caused by massive welding in a traditional wall-face installation way of the large metal aluminum sheet, and has the advantages of convenience in construction, reliable quality, seismic resistance, fire prevention, corrosion prevention, unlikely deformation, environmental protection, easy maintenance and the like.

The invention discloses a riveting pressure detection device, which is characterized in that it includes a laser sensor arranged on a fixed frame at the riveting station, the laser light emitted by the laser sensor points to the position of the rivet to be riveted, and the fixed frame There is also a sensor for detecting the height of the riveting point of the rivet after riveting, and the laser sensor and the sensor are both connected to a control unit. The riveting detection device of the present invention uses a laser sensor to detect whether the rivets are complete before riveting, and then starts riveting after they are complete. If there are no rivets, the workpiece will not be riveted, and the workpiece will be automatically transferred to the next step by the control device. Work station, re-enter the riveting process after the rivet is loaded, reducing the generation of waste products. After riveting, the height sensor is used to detect whether the height of the riveting point of the rivet is standard, so as to ensure that the diameter of the riveting point is consistent and the quality of the riveting product is guaranteed.

The invention provides a community organic matter in-place digestion degradation biogas preparation electrical power generating system. According to the community organic matter in-place digestion degradation biogas preparation electrical power generating system, kitchen waste of each household in a community is smashed into small particle organic waste, and is mixed with toilet wastewater of each household and community green garbage, and high concentration waste water is obtained via concentration; the high concentration waste water is subjected to anaerobic digestion so as to obtain biogas and a digestion liquid; biogas is subjected to desulfuration purifying so as to obtain pure biogas, the biogas is used for generating electric energy via combustion in an internal combustion engine, and electric energy is recycled back to users in the community; the digestion liquid is treated so as to obtain a fertilizer and terminal waste water; and terminal waste water is subjected to simple treatment in septic tanks, and then is discharged into municipal sewage pipe networks. The community organic matter in-place digestion degradation biogas preparation electrical power generating system is capable of realizing pretreatment of waste sources, and in-place anaerobic digestion, so that technological process is short, treatment cost is low; kitchen waste is not stacked or transported, environment pollution is not caused, and transportation cost is reduced; and at the same time, electric energy generated by the community organic matter in-place digestion degradation biogas preparation electrical power generating system can be used, new energy policy subsidies from the government can be obtained, and economic efficiency maximization is realized.

Disclosed is a biological desulfurization apparatus including a reaction tower 1 into which biogas generated by anaerobic fermentation of organic waste is to be introduced, a carrier-packed layer 2a, 2b arranged in the reaction tower and provided with a carrier to which microorganisms have adhered, an air feeding pipe 3 that mixes air into a lower part of the reaction tower, and a sprinkling mechanism 7 that sprinkles water on an upper part of the reaction tower, wherein the carrier-packed layer is arranged in two or more stages.