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1269 results about "Reclaimed water" patented technology

Reclaimed or recycled water (also called wastewater reuse or water reclamation) is the process of converting wastewater into water that can be reused for other purposes. Reuse may include irrigation of gardens and agricultural fields or replenishing surface water and groundwater (i.e., groundwater recharge). Reused water may also be directed toward fulfilling certain needs in residences (e.g. toilet flushing), businesses, and industry, and could even be treated to reach drinking water standards. This last option is called either "direct potable reuse" or "indirect potable" reuse, depending on the approach used. Colloquially, the term "toilet to tap" also refers to potable reuse.

Active carbon fiber organic gas recovery method and system using nitrogen as desorption medium

The invention relates to a method for recovering active carbon fibre organic waste gas by taking nitrogen as desorption medium, belonging to the field of environmental protection. The method for recovering active carbon fibre organic waste gas by taking nitrogen as desorption medium takes the active carbon fibre as a fixed bed adsorber of the adsorbent, adopts thermal nitrogen desorption and can recover and reuse the organic waste gas and nitrogen at the same time. The method of the invention adopts the thermal nitrogen adsorption, generates no secondary contaminant, realizes that the exhaust reaches the standard of the environmental protection, leads the adsorption layer to keep dry at the same time, improves the utilization ratio of the active carbon fibre and prolongs the service life of the active carbon fibre. As vapour is not used for desorption, the equipment has no corrosion problem, thus greatly reducing the manufacture cost of the equipment. The method of the invention has extremely good recovery effects on solvent with large water solubility and easy hydrolysis performance and organic waste gas with high boiling point, has low water content in the recovered products, high quality of the solvent and reduces the running cost.

Pressurized uv/o3 water purification system

An oxygen containing gas is injected at a pressure in the range of about two (2) to about five (5) atmospheres or more into an ultraviolet transmissive sleeve surrounding an ultraviolet lamp to produce a high concentration of ozone. Simultaneously, the ultraviolet lamp irradiates water to be purified disposed in a container surrounding the sleeve. The ozone enriched gas is entrained into the water flowing into the container resulting in an oxidative reaction with any organic matter present and coming into contact with the ozone. Alternatively, the ozone may be entrained in water in a second container downstream of the container wherein the water has been irradiated with ultraviolet radiation. In a further variant, the ozone may be entrained in water in a container upstream of the container wherein the water has been irradiated with ultraviolet radiation. In a yet further variant, the ozone may be entrained in one or more containers upstream and prior to irradiation of the water with ultraviolet radiation in the downstream most container. The ozone may be extracted from the ozonated water prior to discharge if the oxidative effect of the ozone is not desired for the intended end use. To enhance ozone production a predetermined pressure is maintained within the sleeve. To prevent damage to sleeve in the event of a drop in pressure of the water surrounding the sleeve, a further differential pressure regulator may be used to relieve the pressure within the sleeve by discharging ozonated gas from within the sleeve. By use of specifically configured end caps for the sleeve, certain existing water purification systems may be converted to embody the present invention.

Method for producing high-quality sodium fluoride from fluorine-containing wastewater as raw material

The invention discloses a method for producing high-quality sodium fluoride from fluorine-containing wastewater as a raw material. The method comprises the following steps: directly adding excessive sodium carbonate into the fluorine-containing wastewater to completely crystallize and separate fluorine in the solution in a mode of sodium fluoride, or firstly, adding amino into the fluorine-containing wastewater so as to obtain an ammonium fluoride solution, or firstly, precipitating and enriching the fluorine in the fluorine-containing wastewater, secondly, converting a precipitated and enriched product into an ammonium fluoride solution by using an ammonium salt solution, adding excessive sodium carbonate into the ammonium fluoride solution to completely crystal and separate the fluorine in the mode of sodium fluoride, and filtering so as to obtain sodium fluoride filter cakes and a post fluorine precipitation liquid; and washing the sodium fluoride filter cakes by using the ammonium fluoride solution, drying so as to obtain a high-quality sodium fluoride product of which the purity is up to 99.25% or greater, crystallizing the post fluorine precipitation liquid to recycle sodium carbonate in the post fluorine precipitation liquid, further desalting a sodium carbonate crystallization mother liquid, and recycling reclaimed water. The method has the advantages of being simple and convenient to operate, high in fluorine recycling rate, low in production cost, good in sodium fluoride product quality, free of fluorine-containing waste and the like.

Method and device for zero-emission treatment of high-hardness waste water containing sulfate

The invention belongs to the field of waste water treatment and reclaimed water reuse, in particular to a method and a device for the zero-emission treatment of high-hardness waste water containing sulfate. The method for the zero-emission treatment of high-hardness waste water containing sulfate comprises the following steps: 1) sequentially substituting calcium and magnesium ions in waste water into sodium ions by a double-alkali process and an ion exchange process and simultaneously removing most alkalinity so as to promote sulfate radicals and chlorine ions to be the main components of rest anions in water and promote sodium ions to be the main component of cations; 2) concentrating waste water obtained in step 1) through reverse osmosis and reclaiming produced water; 3) separating and concentrating concentrated water treated by reverse osmosis in step 2) through nanofiltration so as to obtain nanofiltered concentrated water of which the main component is sodium sulfate and nanofiltered produced water of which the main component is sodium chloride; 4) after concentrating the produced water nanofiltered in step 3) through reverse osmosis or positive osmosis, evaporating and concentrating; 5) removing sulfate radicals from the concentrated water nanofiltered in step 3). The concentrating times of waste water is increased as much as possible, and the evaporating quantity of waste water is reduced.

Nano crystallite composite filter material and supplement of manufacture method thereof

The invention extends the connotation range required to be protected on the basis of a previously issued patent ZL200710025045.4, i.e., a nanometer microcrystalline composite filter material and a preparation method thereof, belonging to the field of a water disposal technique material. According to weight percentage, the nanometer microcrystalline composite filter material comprises 3-95 percent of attapulgite clay, 5-80 percent of sepiolite clay, 2-25 percent of kaolinite clay, 2-97 percent of tubular halloysite, 5-75 percent of diatomite, 5-75 percent of natural zeolite (clinoptilolite, mordenite and the like), 0-25 percent of pillared montmorillonite, 0-50 percent of expanded vermiculite, 0-5 percent of expanded perlite and 0-50 percent of active carbon or bamboo carbon powders. All raw materials which are powder shapes are mixed according to proportion and stirred to granulate by adding an inorganic adhesive, then sintered and activated at the temperature of 900-500 DEG C (inert gas is required for sintering and activating the filter material added with active carbon). The nanometer microcrystalline composite filter material has smooth shape, rough surface and uniform particle size, with the diameter of 1-10mm, and is used for biological filter tanks and high-class adsorption filter materials in deep purification systems of drinking water and reclaimed water sewage disposal systems.

System and method for treating water recycled from straw pulp papermaking wastewater

The invention discloses a system and a method for treating water recycled from straw pulp papermaking wastewater. The system is formed by sequentially or respectively connecting a regulating tank, a primary efficient coagulative precipitation tank, a secondary efficient coagulative precipitation tank, a middle water tank, an ultrafiltration membrane treatment device, a reverse osmosis membrane treatment device, an ozone contact oxidation tower, an active carbon adsorption tower, an acid regulating tank, a higher oxidization reaction tank, a neutralizing precipitation tank and a water-producing tank. The system organically combines the coagulative precipitation treatment, the higher oxidization treatment, the ozone catalysis oxidation treatment and the treatment of an ultrafiltration membrane and a nanofiltration membrane, treats the water recycled from the straw pulp papermaking wastewater by using a physical and chemical treatment technology and a shunting treatment and combined effluent treatment process and mode, can ensure that the large scale recycled water of the straw pulp papermaking industry reaches the requirement of reuse water after treated and does not affect a papermaking process and a paper product on the premise of ensuring the low operating cost, and the treated reverse osmosis concentrated water reaches the emission standard of the industry.

Advanced purification treatment system for high concentrated organic wastewater

The invention relates to a deep purification treatment system for high-concentration organic wastewater. The system comprises a grid, an aeration adjustment pool, a coagulation pool, a primary precipitation pool, an anaerobic pool, a hydrolysis acidification pool, an aerobic biofilter, a secondary precipitation pool, deep oxidation equipment, a sludge pool and a recycling water storage pool; through coagulation and primary precipitation, partial organic pollutants and suspended particulate matters in wastewater are removed; through anaerobic, anoxic and aerobic multistage mutual function, firstly, large-molecule organic matters are degraded to small-molecule organic matters; the small-molecule organic matters are decomposed to inorganic oxide and water through aerobic microorganism; the residual organic molecules in the water which are different to have biological decomposition under usual condition are subjected to further oxidation treatment through the deep oxidation equipment; the deep oxidation equipment preferentially selects a photocatalytic oxidation purifier with ozone input; through the oxidation function of ozone under catalysis of an photocatalyst, outlet water formed finally has high purification degree and no biological pollution and can be used as recycled water; and the deep purification treatment system is suitable for treating various wastewater with high concentration and organic pollution.

Tower type earthworm and ecological filter for treating sewage

The invention provides a combined process of tower angleworm bio-filters and constructed wetlands for treating the domestic sewage. The combined process comprises the following steps: firstly, the sewage enters a hydrolysis-acidification pool and stabilizes after the action, and the water quantity is adjusted; secondly, the domestic sewage in the hydrolysis-acidification pool is distributed into a hydrolysis-acidification pool for removing COD, total nitrogen, nitrogen-nitrogen, total phosphorus and pathogeny microbes; and thirdly, the tail water in the second step enters a constructed wetland to be subjected to strengthening treatment, thereby building a suitable waterfront surroundings landscape, or the tail water is recycled by serving as reclaimed water. The combined process has the following advantages: firstly, the system hydraulic loading is high, and the surface hydraulic loading can reach 1m<3>/m<2>*d, thereby greatly saving land; and secondly, under the high hydraulic loading, the total nitrogen removal rate of the system can reach more than 85 percent; the removal rates of other materials in the system are all more than 90 percent, the effluent reaches the primary standard of the national sewage comprehensive emission standard (GB8978-1996), and reaches the miscellaneous domestic water quality standard of the PRC construction standard (CJ25.1-89), thereby being able to be recycled by serving as the reclaimed water.

Sol-gel method preparing active carbon-titanium dioxide composite photocatalyst method and application of the said photocatalyst

A process for preparing a composite photocatalyst of active carbon-titanium dioxide by a sol-gel method, and use of the composite photocatalyst are disclosed in the invention. The process includes: firstly mixing butyl titanate having a certain quantity with absolute ethyl alcohol in a condition of continuously agitating and continuously agitating for 15 minutes, adding in drops with catalyst formed by water, acetic acid and absolute ethyl alcohol which volume ratio is 4:5:10 under intense agitation to obtain TiO2 sol after continuous agitation; then in the sol generating process, adding active carbon according to weight ratio of butyl titanate and carbon as 0.1:1, after completely agitating, oscillating in ultrasonic wave and placing the sol in a hourglass type hopper to vacuumize and filter extra sol, after drying, heat treating to obtain the composite photocatalyst. The composite photocatalyst of active carbon-titanium dioxide prepared by the invention can be used for degrading formaldehyde, and a performance testing result shows that the composite photocatalyst can be cooperated for harmful gas for effectively degrading microscale formaldehyde in water, which effect is superior to that by only using one of the catalyst.

Composite corrosion and scale inhibitor for reclaimed water as circulating cooling water of power plant

InactiveCN102923868ALow in phosphorusEfficient corrosion inhibitionScale removal and water softeningConcentration ratioPhosphine
The invention relates to a composite corrosion and scale inhibitor for reclaimed water as circulating cooling water of a power plant, in particular to a low-phosphorous high-efficiency composite corrosion and scale inhibitor for the reclaimed water for the circulating cooling water system of the power plant, comprising the following components by weight: 10%-12% of organic phosphine, 10%-15% of dispersant, 1%-2% of zinc salt, 16%-18% of molybdate, 0-2% of copper corrosion inhibitor and water. When the composite corrosion and scale inhibitor is used for the condition that the outgoing water of a reclaimed water plant is used as the circulating water system of the water supplement of the circulating cooling water of the power plant and the concentration ratio is 4, the amount of usage is about 20mg/L according to the water supplement, the corrosion rates of carbon steel, copper and stainless steel are all lower than the national standards (the corrosion rate of the carbon steel is 0.075mm/a, the corrosion rate of the copper is 0.005mm/a, and the corrosion rate of the stainless steel is 0.005mm/a), and yearly fouling resistance is 0.88 (+/-0.05)*10<-4>m<2>.DEG C/W, which satisfy the design requirement of 'GB50050-2007 Design Code for Industrial Circulating Cooling Water Treatment'.

Apparatus for integrated treatment and comprehensive utilization of wastewater and use thereof

The invention relates to a wastewater integrated treatment and comprehensive utilization device and application thereof. A method for the wastewater integrated treatment and comprehensive utilization comprises the following steps: firstly leading the wastewater into an oil interceptor tank and then into an equalizing tank; leading the wastewater after neutralization regulation into a biochemical treatment tank where a sump pump and an aeration device are arranged; leading the wastewater after the biochemical treatment into a sedimentation tank; leading the sedimentated wastewater into a filter tank with built-in filler for the filtration treatment of the wastewater; arranging a back flushing device or filtering material regeneration device beside the filter tank; leading the water outputted from the filter device into an advanced treatment tank to obtain the reclaimed water up to the standards; leading the reclaimed water into a reclaimed water tank where a liquid level controller is arranged for controlling the liquid level; and lifting the rest sludge in the sedimentation tank to a sludge drying compost tank, and carrying out the moderate temperature and high temperature composting of the rest sludge through a temperature controlled heating device. The integrated device is enveloped by an insulating layer formed by polyurethane sandwich boards. The invention provides an integrated device which has the advantages of modularized unit structure, high treatment efficiency, strong self control, wide adaptability, less investment and convenient motion and transportation.

Electrocatalysis separation film water treatment device

InactiveCN101104537ATo achieve the purpose of clean waterSolve the degradabilityDispersed particle separationElectricityReclaimed water
The present invention provides an electrocatalytic separation membrane water treatment device, which comprises a shell body and a separation membrane that divides the inner space of the shell body into two parts, wherein, one part is a concentrated liquid space and the other part is a permeation liquid space; the concentrated liquid space comprises a raw water inlet and a concentrated liquid outlet that are arranged on the shell body; the permeation liquid space comprises a permeation liquid outlet arranged on the shell body. The invention is characterized in that a mesh conductive body is arranged inside the concentrated liquid space, at a position facing the separation membrane; the separation membrane and the mesh conductive body are respectively connected with constant current source to form an electron emission zone and an electron reception area; under the effect of the electric field of the constant current source, electron swarm make skip metastasis from the electron emission zone to the electron reception area; while in the metastasis process, OH, O, and H2O2 are produced to form strong oxidation source to decompose the organic matter concentration in the water. The device can be used to provide low-cost operational treatment for organic wastewater, micro-polluted drinking water, reclaimed water reuse, mine water, oil extraction wastewater, swimming pool circulating water and aquaculture circulating water, so as to play a positive role in environmental protection.

Method for reclaiming fluorine-containing and ammonia nitrogen-containing waste water in electronic industry

The invention relates to a method for reclaiming fluorine-containing and ammonia nitrogen-containing waste water in electronic industry. In the method, waste water passes through a three-in-one integral device formed by the sequential series connection of a waste water treatment plant treating process, a water works treating process and a pure water treatment plant treating process to obtain reclaimed water. The device for implementing the waste water treatment plant treating process comprises a conditioning tank, a reaction tank and a clarifying tank; the device for implementing the water works treating process comprises a quartz sand filter tank, an ozone contact tank and an activated carbon filter tank; and the device for implementing the pure water treatment plant treating process comprises an ultrafiltration membrane device and a cleaning-resistant reverse osmosis membrane device, and thick water produced by the cleaning-resistant reverse osmosis membrane device can be reclaimed or not to obtain the reclaimed water according to the reclamation rate requirement and environmental impact assessment requirement of a reclamation customer. The reclaimed water treated by the invention has stable and favorable quality, meets and surpasses the leading indicators of GB5749-2006 Standards for Drinking Water Quality issued by China, and can be used as primary pure water for industrial production.

Treatment and recycling method of industrial wastewater containing a plurality of heavy metal ions

The invention relates to a treatment and recycling method of industrial wastewater containing a plurality of heavy metal ions, and the method can be applied in wastewater treatment and wastewater cyclic utilization of a non-ferrous metal metallurgy manufacturing enterprise. The technology comprises the following steps: wastewater containing a plurality of heavy metal ions, oil separation and desanding, water quality and quantity homogeneous regulation, basic flocculation precipitation reaction, primary precipitation, air floatation and oil removing, sulfuration and flocculation precipitation reaction, secondary precipitation, and filtration. According to the invention, wastewater containing a plurality of heavy metal ions of nonferrous metals and As-containing noble metal ions can be processed, and processed water enters a reclaimed water treatment station to be processed for cyclic utilization. Thus, the pollution of nonferrous metal ions in industrial wastewater to production regions, downtown living environment and surrounding ecological environment is reduced, and recovery rate of nonferrous metal ions is raised. Recovered metal and noble metal have high economic value. Enterprise recycling economy and resource comprehensive utilization are promoted, and reducing discharge and maximum utilization of resources are achieved. Thus, the method provided by the invention has a wide application prospect in the non-ferrous metal metallurgy enterprises.

Complete technology for resource utilization of rainwater

The invention relates to a complete technology for resource utilization of rainwater. The complete technology comprises the steps of: purifying rainwater from different underlaying surfaces by adopting split-flow and filtering methods, disinfecting, and combining the clean rainwater with a tap water or reclaimed water supplying system so as to realize resource utilization of the rainwater. According to the invention, pipelines/channels are used for sequentially connecting a rainwater overflow well, a rainwater grid well, a rainwater sedimentation tank, a rainwater split-flow tank, an inspection well, a regulation and storage tank and a clean water tank; a lift pump lifts rainwater in the rainwater clean water tank to an elevated water tank, the bottom of the elevated water tank is connected with the bottom of a mechanical filter through a pipeline, the top of a mechanical filter is sequentially connected with a filter pump and the regulation and storage tank through pipelines, and a disinfecting tank passes through a tee pipe and is respectively connected with the clean water tank and the mechanical filter by related pipeline systems so as to jointly form a rainwater colleting system, a high-efficiency purifier, a rainwater recycling system, a rainwater treatment system and a chemical feeding disinfection system.
Owner:云南高科环境保护科技有限公司 +1

Low-influence region rainwater treatment and utilization system and region rainwater treatment method

The invention discloses a low-influence region rainwater treatment and utilization system and a region rainwater treatment method. The system comprises a retention type gutter inlet, wherein the retention type gutter inlet is separately connected with a rainwater impounding reservoir and a rainwater storage tank respectively through pipes, the rainwater storage tank is used for collecting water or rainwater abandoned from the retention type gutter inlet and overflowed from region greenbelts or grass planting swales, a filtering device is arranged in the rainwater impounding reservoir, and the rainwater impounding reservoir is connected with a drip irrigation system. The low-influence region rainwater treatment and utilization system further comprises a garage top plate drainage ditch, wherein the garage top plate drainage ditch is connected with a rainwater filtering well, and the rainwater filtering well is connected with the rainwater impounding reservoir. The system further comprises multiple underground permeation piles. The system promotes rainwater permeation towards the underground and improves the water permeation speed through the arranged permeation piles, is high in automation level, measures the water amount in the rainwater impounding reservoir through a water level gauge, automatically performs switching when the rainwater amount is insufficient, adopts reclaimed water for water supply, reduces the damage of earlier-stage project construction to formation bearing and decreases the sinking situation of the earth's surface caused by rainfall.

Resourceful cyclic utilization technology for household and building rubbish

The invention discloses a resourceful cyclic utilization technology for household and building rubbish. The technology comprises the steps that firstly, the rubbish is fermented, percolate treatment is conducted, the rubbish is conveyed into a pyrolysis gasifier, and methane is used for supporting combustion; secondly, the rubbish is combusted, and coke residues are stored and left for use; thirdly, high-temperature smoke is subjected to heat absorbing and recycled to be guided into a tunnel kiln for air drying of sintered green bricks; fourthly, the coke residues and fly ash are conveyed to the tunnel kiln for brick sintering; fifthly, recycled water and process cooling water are used for green brick manufacturing and stirring, and high-temperature steam is used for power generation; sixthly, the building rubbish is roughly broken, impurity removing is conducted, secondary fine breaking is conducted, impurity removing is conducted, and recycled aggregate is screened and used; seventhly, the recycled aggregate with the particle size being 3 mm-10 mm is used for manufacturing hollow blocks; and eighthly, recycled fine powder with the particle size being smaller than 3 mm is used for brick sintering. The resourceful cyclic utilization technology has the beneficial effects that the household rubbish, the building rubbish and the brick sintering technology are organically combined, waste water reaching the standard, the coke residues, the fly ash, the high-temperature smoke, steam and generated electricity are utilized in rubbish treatment and brick sintering, the rubbish is thoroughly utilized, secondary pollution is eliminated, the household rubbish and the building rubbish are cyclically utilized, and waste is turned into wealth.
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