2994 results about "Resource recovery" patented technology

A wastewater treatment system is provided including an aerobic membrane bioreactor and an anaerobic digester system connected to receive wasted solids continuously from the aerobic membrane bioreactor and also connected to return effluent from the anaerobic digester system continuously to the aerobic membrane bioreactor. Further, a process is provided for treating wastewater including the step of wasting a volume fraction of organic cell mass from an aerobic membrane bioreactor to an anaerobic digester system and maintaining a solids retention time (SRT) in the bioreactor that is (1) greater than a time needed to achieve growth of organisms suitable for converting carbonaceous biochemical oxygen demand (CBOD) into cell mass and (2) less than a time at which substantial decay of the organisms occurs. The system and process may further include optional pretreatment and/or phosphorus and/or nitrogen removal downstream of the membrane bioreactor system.

Relating to the technical field of resource recovery and recycling, the invention discloses a resource-based and harmless treatment method for kitchen waste. The method is directed at the problems of high salt content in fertilizer products, easy cause of soil salinization, and large equipment investment for anaerobic fermentation of total waste in existing kitchen waste treatment methods. The method comprises the steps of: (a) kitchen waste sorting; (b) water bath desalting: adding water, and conducting heating and stirring to dilute salt; (c) solid-liquid separation: dehydrating the waste; (d) solid material aerobic fermentation: crushing the dehydrated solid material into small particles, and conducting aerobic fermentation and drying treatment to obtain an organic fertilizer; and (e) waste liquid anaerobic fermentation: conducting oil-water separation on the waste liquid, recovering grease, subjecting sewage to anaerobic fermentation, making the produced biogas residue and biogas slurry into a liquid fertilizer, and taking the produced biogas as the fuel of a biogas boiler. The method provided by the invention is particularly suitable for resource-based and harmless treatment of kitchen waste.

A method to suck pressure relief firedamp along Y-shape ventilating gob roof of the empty tunnel is characterized in that: in the high-firedamp coal mining working-face pressure relief zone along the empty tunnel gob roof, it sucks the stripping and free firedamp from the exploiting and pressure relief layer which gathers in the gob upper part and the ring slit loop through the slit channel formed by the mining influence on the gob upper rock stratum through the dip sucking firedamp bore-hole which are distributed in the pressure relief ring slit loop. The pressure relief ring slit loop locates in the separation layer slit zone above the caving zone on the Y-shape ventilating working-face along the empty tunnel gob roof. The invention resolves the air firedamp overrun in the corner and the return airway on the coal mining working-face basically, realizes the sucking and application of the high density firedamp, improves the resource utilization ratio, exploits the high firedamp coal seam without coal wedges, improves the mine resource recovery and assures the high-efficiency and safe exploitation of the coal mining working-face.

A computer resource control system for running business applications on virtual computers within a business computer by using computer, virtual computer, network, and storage resources, the system comprises a collection process section for periodically collecting the dynamically changing information about the use of each resource when business applications run on the virtual computers within the business computer; a resource recovery process section for calculating the amounts of resources required for the operations of the business applications periodically in accordance with the dynamically changing information about the use of each resource, which is gathered by the collection process section, allocating the calculated amounts of resources to the resources of each virtual computer, and recovering any extra resources; and a resource allocation process section for allocating the extra resources, which are recovered by the resource recovery process section, to the virtual computers in accordance with the priorities of the business applications.

The recycle treatment method for printing and dyeing wastewater aims to providing a system technique to recycle and treat the desizing, base-decrement, dyeing sewage with no effect to dyeing product quality and high yield and low cost, which comprises: taking acid-out pre-treatment to sewage for recycling slurry; then, taking A/O biochemical treatment with dyeing sewage and ozone catalytic advance treatment to recycle more than 60% water. This invention can release greatly water-resource pressure with the facility payback period less than five years.

The invention relates to a combined technique of treating and reusing the organic sewage which is rich in cyanogen, ammonia and salt, and adopts the combined techniques of acidified decyanation (with the sodium cyanide recollected), basified ammonia blowing (with ammonium salt recollected), oxidation by adding chlorine, biological treatment, precipitation and clarification, deep oxidation, biological active carbon filtering, one-time brine refining, microstraining film, and other combined techniques, and then the chlorine alkali is produced after the secondary brine refining in the chlorine alkali industry and the entrance into the ionic membrane electrobath. The combined technique can be used for treating the industrial sewage in the tricyanogen chloride, chlorine alkali, gold mine, galvanization and other industries and conduct recovery of the resources, thereby overcoming the disadvantages that the prior art has narrow applicability and treatment function and disappointing treatment result, cannot recollect the resources, and has high treatment cost and unobvious economical benefit. The combination of the technique is scientific and reasonable, the technique is novel, unique and mature, the treatment is good, and the combined technique has a plurality of functions, strong applicability, wide use range and remarkable environmental and economical benefit.

A rubbish classification operation and management system comprises a user terminal, an information processing platform, a user management terminal and a resource recovery station. The user terminal is used by a user, provided with a user account and used for scanning two-dimensional codes on a rubbish bag group of a plurality of rubbish bags, and therefore the serial number of the bar codes of each rubbish bag in the rubbish bag group can be associated with the user account. The resource recovery station comprises a bar code scanner, a voice module, a video module, a plurality of classification rubbish cans, a data transmission module and a control module. The bar code scanner is used for scanning the bar codes of the rubbish bags. The video module is used for performing video monitoring on the user. The voice module is used for performing voice guidance on the user and guiding the user to throw rubbish into the correct classification rubbish cans. The control module controls the data transmission module to send the information of the rubbish bags to the user management terminal through the information processing platform. The user management terminal is used for pushing rubbish throwing information and integral information to the user terminal.

A band filling stoping mining method effectively solves the problems in the prior stoping mining of a 'three-low' coal bed, such as the sedimentation and distortion of the earth surface, the low recycling rate of coal and charcoal resources, the existence of safety hazards, etc. The method comprises the following steps: a transporter and a coal mining machine are laid on the working face of the mining area; in the direction perpendicular to the direction of the transporter movement, a timbering device which is composed of a hydraulic bracket of the working face, a side molding board bracket for filling beside the lane and a back molding board bracket for filling beside the lane, and connected with the connecting head of the transporter is arranged; after the brackets are pushed along the working face, paste concrete is injected through a pipeline into a filling mold cavity enclosed by the brackets, so as to form a band-shaped filling wall which is supported between the top plate above the goaf and the bottom plate of the coal bed. By the method, safe and convenient mining operation is ensured; the recycling rate for coal and charcoal is increased; meanwhile, the sedimentation and distortion of the overlying strata of the coal bed and the earth surface can be controlled in a very small range of deformation permitted by a building, thereby minimizing the amount of gentle sedimentation of the earth surface, and protecting buildings and attachments on the earth surface.

The invention discloses an ultrafine lead oxide prepared by using a waste lead plaster and a preparation method thereof. The preparation method comprises the following steps of: carrying out desulphurization process by mixing the waste lead plaster with an aqueous solution containing a composite desulfurizer for reaction; carrying out filtration to remove the desulphurization filtering solution to obtain the desulfurated lead plaster (filter residue); carrying out a leaching and crystal transformation process by adding a citric acid solution and a reducing agent into the desulfurated lead plaster obtained in the process, and carrying out filtration, washing, and drying to obtain the lead citrate after the desulfurated lead plaster reacts with the citric acid solution; carrying out a roasting process by roasting the lead citrate to obtain the ultrafine lead oxide. According to the preparation method disclosed by the invention, the ultrafine lead oxide is prepared from the waste lead storage lead plaster; a two-step leaching process is adopted; the filtering solution is simple in ingredient and can be recycled; a side product is recycled from the desulphurization solution. The preparation method disclosed by the invention is low in energy consumption, simple in equipment, high in lead recycling rate, and high in ultrafine lead product quality, and has the characteristics of good resource recycling effect, environmentally-friendly and pollution-free production process, and capability of clean production.

The invention discloses applicable classification method for mining under the shallow bedrock of thin seam keeping water conditions. Apply to thin seam overlying shallow bedrock aquifer water loose the protection of water resources. At first according to the feature of structure or Shallow bedrock, the height of leading water crevasse under different mining height is analyzed and calculated. The estimate formula: HL=9.29M+10.6 can be used to determine the height HL of leading crevasse water under the shallow bedrock of thin seam to the different mining height M. The mining waterproofing security coal rock pillar protector thickness of the thin bedrock shallow submersion coal bed long well working surface is 10 m. According to the classification situation of loose water-bearing stratum water body, the bedrock thickness which is needed is determined under the condition of different mining height. According to classification situation and mining height, mining is separated into reinsurance water mining according to the bedrock thickness. This method has good water resources protection effect, is safe in production, and has high coal resource returns-ratio.

The invention relates to a method for recycling resources, in particular to a method for preparing biomass fuel from kitchen waste resources. The method for preparing biomass fuel from kitchen waste according to the present invention comprises sorting and crushing the kitchen waste, then dehydrating and deoiling, and anaerobically fermenting the solid materials in the kitchen waste after extracting the oil, and degrading the produced biogas Recycling, solid-liquid separation of the biogas slurry, the separated biogas residue is mixed with sludge, straw and other biomass materials, and dried and briquetted to make biomass fuel. The invention recycles kitchen waste and turns waste into treasure. It not only realizes the harmless and reduction treatment of kitchen waste, but also treats biomass waste such as sludge and straw, and the obtained products are completely burned without any waste. Secondary pollution, realize the comprehensive treatment of various wastes.

The invention discloses a method for resource recovery and classification utilization of urban domestic wastes, which at least comprises the following steps of: a magnetic separation step, a waste cutting step, a elutriation flotation step, a waste extrusion dehydration step, an anaerobic treatment step and a sludge deposition concentration step; scrap iron is separated by the magnetic separationstep for the recovery and utilization of the scrap iron; anaerobic organic matter is crushed by the waste cutting step; pasty organic matter and block non-anaerobic wastes are thoroughly separated bythe elutriation flotation step so as to allow the pasty anaerobic organic matter to enter a biogas generation pool or tank for an anaerobic reaction and to allow the clean non-anaerobic wastes to be extruded, dehydrated and dried for individual treatment, and the waste decrement is above 90%; after elutriation, the left 10% non-anaerobic wastes are prepared into fuel oil by a cracking reaction; or are recycled through screening with no screening difficulty being caused by dust and organic matter containing in the wastes; or are delivered into a gasifier for fuel gas production, which preventsthe energy consumption of water-containing organic matter during waste incineration treatment, and greatly increases the thermal efficiency of waste treatment.

The invention relates to a process for separating and recovering selenium from a selenium-containing material. The process comprises the following steps: dissolving the selenium-containing material into a sulfuric acid solution, adding 10% H2O2 into the mixture, filtering and separating to get leachate and residue containing silver, lead, copper and other valuable metals; separating the selenium from tellurium in the oxidation leachate by using sodium hydroxide; and acidifying the selenium leachate with hydrochloric acid, adding sodium sulfite to reduce the settled selenium, washing and drying to get crude selenium with the grade of not lower than 90%. The crude selenium which is separated by the process is higher in purity and can be directly refined, so that the process flow of recovering selenium is shortened, the recovery rate of selenium is improved, the production cost is reduced and the energy is saved; and the sodium sulfite is used for substituting sulfur dioxide to perform reduction, the control is easy and the environmental pollution is further reduced. The process has very important significance in both aspects of recovering resources and protecting an environment.

The invention relates to a method for comprehensive utilization of vanadium-titanium magnetite, which belongs to the field of new technology of direct reduction ironmaking in the metallurgical industry. In order to solve the problems of low utilization of iron, vanadium and titanium in vanadium-titanium magnetite, at the same time, due to the sintering process of traditional technology, the comprehensive energy consumption of the overall smelting process is relatively high, and the environmental pollution is serious. The invention provides a method of agglomerating vanadium-titanium magnetite and producing high-titanium slag and pearl iron by high-temperature reduction and melting in a rotary hearth furnace. The technical solution includes pelletizing of vanadium-titanium magnetite, high-temperature reduction in rotary hearth furnace, magnetic separation, and high-temperature reduction in rotary hearth furnace to directly produce high-titanium slag and pearl iron. Applying this method to process vanadium-titanium magnetite can not only effectively solve the problem of recovery of titanium and vanadium resources, but also obtain qualified iron pearls for steelmaking in electric furnaces, making full use of the iron, vanadium, and Valuable elements such as titanium.

The invention provides a method and a device for treating fluorine-containing waste water. In the method, a solid-liquid fluidized bed is used as a crystal reactor; a certain amount of calcium fluoride seed crystal is added into the reactor; the fluorine-containing waste water and a calcium-containing precipitator are delivered into a treatment device of the solid-liquid fluidized bed in a reacting ratio to ensure that fluorinions are precipitated on the surface of the calcium fluoride seed crystal; the prepared sand-shaped calcium fluoride precipitated slurry after precipitation is reclaimed; and primarily treated water is subjected to flocculent precipitation further to meet the emission standard. By adopting the method, most fluorinions can be precipitated in the crystallization and precipitating process in the fluidized bed, the generated sand-shaped calcium fluoride has low content of water and high content of calcium fluoride and can be used as fluorine resources for recycling; and in the flocculent precipitating process of the primarily treated water, the consumption of the fluorescent is low, and the yield of slurry is low. Therefore, the comprehensive cost for waste watertreatment is low.

The invention provides a flue gas purification and sulphur recovery system and a process, comprising an adsorber, a desorber, an adsorbent delivery system, a heat energy integrated recovery system and a carbon powder separation and recovery system; meanwhile, suitable processing methods are adopted. The adsorber adopts a single-device dual-section radial staggered moving bed shaped like a reversed u and selective wide spectrum purification; the desorber adopts an axial reflux moving bed to realize the integrated recovery and utilization of the heat energy, regeneration of the adsorbent and the recovery of sulphur resource; the adsorbent adopts dense phase pneumatic conveying, thus leading the system to run continuously and stably; the flue gas purification and the sulphur recovery are realized by the carbon-based column-shaped or sphere-shaped desulfurization and denitration adsorbent. The system effectively integrates the energy-saving, exhaust and consumption reduction and resource recovery and utilization together, and has the advantages of high-effect wide spectrum purification and sulphur resource recovery, good gas distribution, grain movement and low pressure reduction, integrated recovery and utilization of heat energy, delivering the absorbent with no mechanical parts, continuous and stable operation of system, saving equipment investment and operation expense, etc.

The invention discloses a method of harmless treatment to residual activated sludge produced by bottom sludge, scum and biochemical treatment units in the petrochemical industry, which comprises: emulsion breaking to the bottom sludge and scum; separation of oil, water and mud of products after emulsion breaking; and recovery of dirty oil at the upper part and sedimentation of mud-water mixture at the lower part, recovery of clear liquor at the upper part, and treatment of coagulation conditioning, flocculation conditioning, sludge concentration, sludge dewatering, sludge drying and sludge incineration to mud-water mixture at the bottom part and the residual activated sludge sequentially. The method can effectively recycle useful oil substances and aluminum-containing compounds in the bottom sludge and scum, purify possibly released malodorous gases in mud produced in the process of storage and disposal, and carry out the treatment such as sludge conditioning, dewatering and drying sequentially to the residual mass hazardous wastes after the recycling treatment, then utilize the current boilers in enterprises to implement the direct incineration treatment. The method has advantages of simple operation and running, safety and reliability, complete resource recovery, controllable water removal, and maximally reducing the environmental pollution.

An electrochemical process for regenerating the used adsorbent generated by demercurating fume includes such steps as treating it by oxidizing-reducing agent and complexing agent to form complexed Hg ions, applying an electric field to reduce the oxidized Hg to Hg, and modifying its surface by penetrating S, P and N.

The invention discloses a method for recycling iron phosphate and lithium carbonate from lithium iron phosphate waste. The method comprises the following specific steps: (I) oxidizing roasting; (II) carrying out pole piece cleaning; (III) adding phosphoric acid and performing ball-milling activation; (IV) performing acid pickling to separate FePO4; and (V) precipitating lithium of the filtrate to obtain a target object Li2CO3. The method disclosed by the invention has the following advantages: the P, Fe and Li resources in the lithium iron phosphate waste can be fully utilized to prepare iron phosphate and lithium carbonate products with high added value, no waste of Fe is generated, the resource recycling rate is high, the technological process is short, the reaction system is simple, a few raw materials are consumed, the cost is low, the product value is high, and the method is very suitable for industrial scale production.

The invention discloses a municipal solid waste incineration fly ash cement kiln calcining resource recovery method, which belongs to the solid waste treatment and disposal technical field. Firstly, the washing pretreatment is implemented on municipal solid waste incineration fly ash to dissolute alkali metal chloride, then supernatant and washed fly ash are obtained through the natural sedimentation. Waste tail gas is pumped in the supernatant, CO2 in which is used to realize the carbonate neutralization and the heavy metal co-sedimentation to reach to the first grade of the national sewage comprehensive discharge standard. The washed fly ash and carbonate are pressed and filtered together for the dehydration. A filter cake is used as cement raw to be input in a cement kiln for the calcining to produce cement clinker. The invention can realize the harmless resource recovery treatment of incineration simply and economically.

The invention discloses a method for deeply purifying and recovering hyperhaline fluoric-U radioactive waste solution. The method comprises three sequent treatment phases including pretreatment, enrichment and separation of U-F and recovery of U, and can be further finely divided into 7 treatment units, including lower temperature reduction separation, chemical sedimentation, film filtering, step-grade organism enrichment-film filtering separation or step ion exchange, deposit fluorine removal solid-liquid separation, microwave tower treatment and resource recovery of U; under the condition that the salinity of waste solution to be treated is 0.1-10%, the initial U concentration is 0.1-1000mg/L, and the fluorine concentration is 0.01-15g/L, after treatment, the concentration of U is not larger than 0.05mg/L, the concentration of the fluorine is not higher than 10mg/L, and the recovery rate of U is larger than 90%. The method for deeply purifying and recovering hyperhaline fluoric-U radioactive waste solution is suitable for treating hyperhaline fluoric-U radioactive waste solution and the resource recovery of radioactive U.

The invention relates to a method for recycling iron and aluminum by particle size grading pretreatment of Bayer process red mud, belonging to the technology for recycling red mud resources. The method comprises the following steps: firstly, Bayer process red mud is graded in terms of the particle size by using a physical method into coarse red mud and refined red mud; the coarse red mud is processed using physical mineral dressing processes, such as magnetic separation, gravity separation and the like, in order to obtain iron ore having high iron quality and coarse-grained sand, which are made use of respectively; the refined red mud is mixed with sodium carbonate, limestone and carbon power and is then subjected to reduction sintering, and two processes of magnetizing reduction roasting of iron and soda lime sintering of aluminum are implemented synchronously by means of the control of sintering conditions; sodium aluminate is dissolved out of clinker through dilute alkali solution, dissolved slag is subjected to magnetic separation to recover iron ore concentrate, and after being subjected to dealkalized cleaning, the residual calcium silicon slag is applied to building material industry. The method realizes combined recovery of iron, aluminum and other elements, magnificently achieves the comprehensive utilization of the Bayer process red mud, is capable of effectively relieving environment pollution resulting from the accumulation of the Bayer process red mud, and has excellent economic and social benefits.