55results about "Water/sewage treatment bu osmosis/dialysis" patented technology

RO membranes using chlorinated water as a feed stream maybe protected from damage by the chlorine with a protective layer including reactive nitrogen which forms chloromines on the surface of the membrane that reduce chlorine penetration. This protective layer also provides substantial anti-fouling capabilities, whether used with a chlorinated or unchlorinated feed stream because the chloramines are anti-bacterial. Although chlorine is lost in use, the anti-fouling layer or coating can be recharged with additional chlorine without damaging the discrimination layer. The anti-fouling layer or coating may be advantageously used with Thin film composite, TFC, membranes for use in forward and reverse osmosis may include nanoparticles, monohydrolyzed and/or di-hydrolyzed TMC, and/or alkaline earth alkaline metal complexes or other additives.

A method of processing a return oil-based drilling fluid includes centrifuging a primarily fluids phase at a first speed and separating the primarily fluids phase into a first effluent and a first residual, centrifuging the first effluent at a second speed and separating the first effluent into a second effluent and a second residual, and centrifuging the second effluent at a third speed and separating the second effluent into a third effluent and a third residual. A surfactant, a polymer, combinations of surfactant(s) and polymer(s) and/or a wash water may be added to one or more of the return oil-based drilling fluid, the primarily fluids phase, the primarily solids phase, the first effluent, the second effluent, and the third effluent.

A method of enhancing the concentration of a first inorganic compound in a first aqueous solution of a first process of a heavy chemical plant, the method comprising (a) feeding the first solution having the first compound at a first concentration and a first water vapor pressure to an osmotic membrane distillation means comprising a hydrophobic, gas and water vapor permeable membrane separating (i) a first chamber for receiving the first solution, from (ii) a second chamber for receiving a receiver feed aqueous solution having a second water vapor pressure lower than the first water vapor pressure; (b) feeding the receiver aqueous feed solution to the second chamber as to effect transfer of water vapor through the membrane from the first chamber to the second chamber, and to produce (i) a resultant first solution having a second concentration of the first compound greater than the first concentration and (ii) a diluted receiver feed aqueous solution; and (c) collecting the resultant first solution. The apparatus and method are of particular value in electrolytic haloalkali production plants in offering reduced capital and operating re-concentration and dilution costs.

The invention discloses a method for removing phenol in phenol contained wastewater by using a hollow fiber membrane. The method comprises the following steps of: mixing a carrier and a diluent to prepare an extractant, wherein the adopted extractant carrier is tributyl phosphate, and the adopted diluent is coal oil or benzene; stirring and fully mixing the extractant and a stripping agent to prepare treating fluid; removing the phenol out of the phenol contained wastewater by using a hollow fiber membrane device; and after pretreating the hollow fiber membrane device, injecting the treating fluid into a tube pass of a membrane component, and injecting the phenol contained wastewater into a shell pass of the hollow fiber membrane component, wherein the wastewater can be treated through the same membrane component or a plurality of serial membrane components in a circular manner for many times; after the wastewater is subjected to two-stage treatment, the phenol concentration is less than 100mg/L; and after the wastewater is subjected to five-stage treatment, the phenol concentration is less than 5mg/L, the removal rate reaches up to 99.8 percent, and the wastewater reaches the national emission standard.

The invention discloses a reverse osmosis water purification system, a reverse osmosis water purifier and a control method. The reverse osmosis water purification system comprises a pretreatment unit as well as a water hardness sensor, a reverse osmosis treatment unit and an electric control system, wherein the water hardness sensor is arranged in front of the pretreatment unit and is used for detecting the water hardness of raw water; the reverse osmosis treatment unit is arranged behind the pretreatment unit and comprises a reverse osmosis membrane filtering device and a washing unit; the reverse osmosis membrane filtering device is used for purifying water treated by the pretreatment unit; the washing unit is used for washing the reverse osmosis membrane filtering device; the electric control system is used for adjusting the washing degree of the reverse osmosis treatment unit according to the water hardness detected by the water hardness sensor. By adopting the reverse osmosis water purification system disclosed by the invention, the washing degree can be adjusted according to the water hardness of the raw water, and the caking pollution of the reverse osmosis membrane filtering device can be prevented.

The invention provides a combined treatment method of leachate and excrement wastewater due to high contents of organic matters and phosphor but insufficient nitrogen in the excrement wastewater and high contents of organic matters and nitrogen but insufficient phosphor in the leachate. Therefore, nitrogen and phosphor in the excrement wastewater and leachate are complemented with each other, nutrient elements required by microbes are balanced, and a biological treatment method is suitable for treatment. According to the method, biological treatment, membrane separation treatment and reverse osmosis deep treatment are adopted, so that the treated discharge water is in accordance with the first-grade requirement of the GB8978-1996 Comprehensive Sewage Discharge Standard of People's Republic of China.

A water disinfection delivery treatment system first filters the supply by a particle and then a carbon filter. The partially treated flow is split in two and a first part passes through a first cutoff valve and is fed into a disinfection (iodine) chamber, filter or feeder via a flow restricter. The chamber output passes through a second solenoid driven cutoff valve. The second part is fed to a third cutoff valve and this valve's output is summed with the second valve's output and then fed into a holding tank. The tank retain's a volume such that the water remains therein for at least a period sufficient to permit a minimum 3 log reduction of pathogenic microbes. A final carbon filter is downstream of the tank as is a meter and dispenser. A method is also provided for delivering potable drinking water.

The present invention discloses household water purifying process and system. The water purifying process includes filtering tap water with polypropylene cotton filter element to eliminate suspended matter and large granule impurity, pressurizing water, filtering water with antioxidant composite reverse osmosis film for the second time while controlling and killing microbe in the surface of the antioxidant composite reverse osmosis film with residual chlorine in water, and storing in a pressure tank. Before being use, the water is further filtered through an active carbon filtering rod to eliminate residual chlorine. The water treating process and system is simple and the reverse osmosis film has less pollution.

The invention relates to a wastewater split-flow separation and quality-based treatment utilization process method. Wastewater is subjected to split-flow into high-concentration waste liquid and low-concentration clean water; the low-concentration water is simply pretreatmented, and is subjected to reverse osmosis separation into fresh water and concentrated water; the resource utilization of fresh water is realized; the quality-based treatment is performed for utilizing concentrated water, so that the wastewater treatment realizes reduction, harmlessness and recycling. The defects of complexity, long flow process, great consumption, serious secondary pollution and the like of the existing wastewater treatment process are overcome. The process method is suitable for treatment and utilization of various kinds of low-salinity industrial wastewater and municipal domestic sewage.

The invention relates to a process of preparing industrial high- purity water. The invention is characterized in that it comprises process of first- level hyper-filteration of pre- treated wastewater, second- level hyper-filtration, and preparation of high- purity water in continuous electric deion desalt apparatus. The advantages of this invention are: small device occupation area, low energy consumption, reduced investment, no contact of water produced in second- level hyper-filteration with air and high- quality purified water.

The invention discloses a magnetic bioreaction separation device for treating organic wastewater, which comprises a magnetic bioreactor and a rare-earth magnetic disc separation device, wherein the magnetic bioreactor consists of a reaction vessel, and microbe carrier magnetic species or magnetic zooglea formed by the microbe carrier magnetic species, which is placed in the reaction vessel; the magnetic bioreactor is connected with the rare-earth magnetic disc separation device by a flowing discharge pipeline; and the upper part of the rare-earth magnetic disc separation device is provided with a water outlet pipe, and the lower part thereof is provided with a sludge discharge valve. Since the invention utilizes the microbes attached to the microbe carrier magnetic species or magnetic zooglea to decompose the organic matter, while the magnetic zooglea and the treated water can be treated by the rare-earth magnetic disc separation device for solid-liquid separation, not only the cost on the investment and operation is lower than that of the membrane bioreactor, but also the separation efficiency is high, the energy consumption is low, and the effect on denitrification, phosphorous, SS, COD and BOD removal; and the invention is particularly suitable for treating the organic wastewater with large flow and high concentration.

The invention discloses a water making device for purifying blood, which can further improve the purity of water quality and the sterilization rate, and can be used for softening the water quality. The device leads pure water to be treated by reverse osmosis membrane separation again, thus ensuring the water quality to be better in accordance with the standard of hemodialysis water; and a softener is used for removing calcium and magnesium ions, thus reducing the hardness of the water. By utilizing the secondary reverse osmosis membrane separation technology, the water making device for purifying blood improves the removal rate of the device for chemical pollutant, thoroughly removes bacteria in the water, leads the quality of the hemodialysis water to reach the standard of the hemodialysis water, and reduces the treatment risk of hemodialysis patients.

The invention relates to the technical field of drinking water purification, in particular to a multi-purpose purifying water filter applicable to military use, family use, and use for individual, unit and field. The water filter comprises a primary purifying water filtration device (A), a special purifying water filtration device (B), an advanced purifying water filtration device (C), a three-way valve (D), a manual or electric pneumatic storage tank water supply device (E), a municipal pipeline water supply device (F) and a manual or electric water pump water supply device (G). The water filter has the advantages that the multi-purpose purifying water filter with excellent effect of purification and filtration and convenience for use of military, family, unit, individual and field is provided. The multi-purpose purifying water filter has simple structural design of products, is convenient and practical and is low in cost, and can achieve the aims of outputting sanitary clean water and kitchen water, directly drinking water on the same purifying water filter respectively, and back flushing a filter element.

A liquid treatment cartridge includes a housing, the housing including a housing part forming an axial end of the housing and including a connecting head at the axial end of the housing. The connecting head includes at least three liquid ports, each at an end of a respective channel defined by the housing part. The connecting head is configured for insertion into a head part of a liquid treatment system such that the liquid ports of the connecting head are in sealed liquid communication with respective liquid ports in the head part. The liquid treatment cartridge includes at least one separate flow conductor part on the inside of the housing, attached to the housing part and including at least one conduit for conducting liquid so as to separate interior ends of at least two of the channels from those of at least one other of the channels. The at least three liquid ports at ends of respective channels defined by the housing part include at least a fourth liquid port.

The invention relates to a combined process for standard-meeting discharge of garbage percolate treatment, which takes a garbage percolate stock solution or a garbage percolate pretreated by an anaerobic regulating reservoir as a treatment object, and comprises the following steps: step one, the garbage percolate to be treated is treated by a multiple microporous carrier reaction bed film-formed with microorganisms to decompose organic substances in the garbage percolate; step two, the oxidation flocculation treatment is performed; and step three, the multistage filtration treatment is performed, the treatment fluid with CODcr less than 100mg/L is drained, and the multistage filtration comprises micro-filtration, fine filtration and reverse osmosis orderly. The process has low treatment cost, simple process, convenient equipment maintenance, strong anti-load capability, strong internal digestion power of metabolites, and small amount of sludge discharge, is suitable for garbage percolates with different concentrations and different discharge requirements, flexibly adjusts a program of process combination according to percolates, combines multiple high-efficiency single technologies, adopts different combination schemes, and ensures that the advantages of the single technology are better played.

The invention discloses a film treatment process for fatty acid wastewater. The invention aims to provide a novel recycling film treatment process for fatty acid wastewater. The process comprises the processes: oil-separating pre-treatment, film technical ultrafiltration, filter pressing, air-floating technology, evaporative treatment or biological treatment and the like. The wastewater treatment process disclosed by the invention adopts a process of a double film method combined with various treatment modes and adopts a process flow of gradually removal and extraction by many steps, so that harmless treatment of the wastewater or recycle of resources is finally realized. The wastewater treatment process disclosed by the invention solves a series of problems that the prior art is complex in process, the wastewater treatment effect is poor, great in difficulty and high in cost, the beneficial components in the wastewater cannot be recycled, the equipment is large in occupied area, the flocculant is liable to low temperature failure and the like.

The invention discloses a preparation method of a polytriazine alkali-resistant composite nanofiltration membrane. The alkali-resistant composite nanofiltration membrane is composed of a porous base membrane playing a supporting role and an ultrathin surface layer, the ultra-thin surface layer is prepared by the following steps: performing interfacial polymerization crosslinking reaction on a polyfunctional group crosslinking agent capable of reacting with amido (primary amine or secondary amine) and a triazine compound with at least two or more amido (primary amine or secondary amine) to form a nascent state nanofiltration membrane, and then performing post-crosslinking by adopting a novel crosslinking agent. According to the preparation method of the polytriazine alkali-resistant composite nanofiltration membrane, the nanofiltration membrane has excellent separation performance, compared with a traditional polypiperazine amide nanofiltration membrane, the alkali resistance of the nanofiltration membrane can be effectively improved through a unique triazine aromatic cross-linked structure, and the membrane can be suitable for systems such as decoloration and saline water separation.

A temperature-humidity exchanger comprising: a moisture permeable membrane which transmits moisture therethrough; a dry gas separator in which low-temperature dry gas is caused to flow; and a wet gas separator in which high-temperature wet gas is caused to flow, in which the moisture permeable membrane, the dry gas separator, the moisture permeable membrane, and the wet gas separator are repeatedly stacked in the stated order, wherein in the dry gas separator and the wet gas separator: a plurality of channel grooves which are divided by half in the stacking direction, are open to a direction in which the channel grooves come into contact with the moisture permeable membrane, and are arrayed parallel to one another are provided; an aggregate communication groove which is made to communicate with both end portions of the plurality of channel grooves, for aggregating gas caused to flow through the channel grooves to at least one is provided; and a supply manifold and an exhaust manifold which are made to communicate with the aggregate communication groove and penetrate the separators in the stacking direction are provided; and a flow of the dry gas caused to flow in the channel grooves of the dry gas separators and a flow of the wet gas caused to flow in the channel grooves of the wet gas separators are counterflows.

The invention relates to the technical field of environmental protection, and discloses a polyacrylonitrile composite nanofiltration membrane for sewage treatment and a preparation method of the polyacrylonitrile composite nanofiltration membrane. The composite nanofiltration membrane comprises a hydrophilic polyacrylonitrile base membrane and a composite layer which covers the base membrane, andthe preparation method of the hydrophilic polyacrylonitrile base membrane comprises the following steps of: (1) mixing ethanol and deionized water uniformly, then adding citric acid and polyvinyl alcohol, and performing stirring and even mixing to obtain a hydrophilic agent; (2) soaking a hydrophobic polyacrylonitrile base membrane into the hydrophilic agent so as to make the soaked polyacrylonitrile base membrane transparent and obtain an intermediate membrane 1; (3) putting the intermediate membrane 1 in an oven for heat treatment to obtain an intermediate membrane 2; and (4) putting the intermediate membrane 2 in deionized water for soaking, taking out the soaked intermediate membrane 2, and putting the soaked intermediate membrane 2 in the oven for drying to obtain the hydrophilic polyacrylonitrile base film. The composite nanofiltration membrane has a high retention rate and high water flux at the same time.

The invention provides a method for treating and utilizing waste water generated by producing saponin by yellow ginger. The method comprises the following steps that: mother liquid wastewater is filtered after the yellow ginger is subjected to acidolysis; the mother liquid wastewater is neutralized to neutrality with pH value of between 4.5 and 5 by calcium oxide; after precipitating, a supernatant is infiltrated into the solution for fermenting, and composite yeast and a nitrogen-contained compound are simultaneously added into the solution to ferment for 3 days at a temperature of between 32 and 38 DEG C; after fermentation is completed, the mother liquid wastewater which is treated by the processes is infiltrated to an alcohol tower for distilling; after alcohol is distilled out, the content of COD in residual wastewater in the tower is about 1,000; and after the residual wastewater is filtered through a polymer film to filter out yeast, calcium substances and other organic substances in the wastewater, the residual mother liquid wastewater is purified water, so discharge standard without pollution is met.

The invention relates to the technical field of water purification, and in particular relates to a method for preventing a whole-house separate purifying device film from being polluted. The method comprises the following steps of: 1) carrying out ultrafiltration membrane backwashing on a hollow fiber ultrafiltration membrane of ultrafiltration equipment through tap water, and then carrying out positive ultrafiltration membrane washing; and 2) carrying out positive spiral-wound membrane washing on a spiral-wound membrane of nanofiltration or reverse osmosis equipment through water. According to the method for preventing the whole-house separate purifying device film from being polluted, the hollow fiber is subjected to ultrafiltration backwashing, positive ultrafiltration washing and positive spiral-wound membrane (nanofiltration or reverse osmosis) washing by the raw water of tap water when in downtime in light of the polluting conditions of the hollow fiber ultrafiltration membrane and the spiral-wound membrane (nanofiltration membrane or reverse osmosis membrane) of a core component of a whole-house separate water supplying device, the serious pollution of the hollow fiber ultrafiltration membrane and the spiral-wound membrane (nanofiltration membrane or reverse osmosis membrane) can be effectively avoided, the stability of the system in running can be ensured, the service life of the reverse osmosis membrane is prolonged, and the operation cost of the system is reduced.

An energy-saving filtering system and a hollow fiber membrane module for the same are disclosed. According to the filtering system of the present invention, pretreated feed water flows into the case of the hollow fiber membrane module by gravity, and the filtrate passing through the hollow fiber membrane is discharged from the hollow fiber membrane module by gravity.

The invention discloses a nano silver @ polyvinylidene fluoride antibacterial separation membrane and a preparation method. The nano silver @ polyvinylidene fluoride antibacterial separation membrane is prepared from polyvinylidene, a pore forming agent, nano silver, inorganic nanoparticles and an organic solvent in a certain proportion. The preparation method comprises the steps that (A) the pore forming agent and the nano material which are weighed are added to the weighed organic solvent for ultrasonic dispersion; (B) the weighed polyvinylidene is added to the organic solvent, and mechanical stirring, standing and defoaming are performed to obtain a casting membrane solution; (C) the casting membrane solution is scraped on a glass plate to form a membrane, the membrane is put into a solidification fluid and is soaked till the membrane sheds, and the membrane is rinsed with distilled water at room temperature and then is put into deionized water to obtain the nano silver @ polyvinylidene fluoride antibacterial separation membrane. Raw material sources are wide, a process is simple, industrial large-scale production is easy to achieve, the antibacterial rate of a PVDF membrane can be improved by the added nano silver by 40% or above, the membrane pollution index is reduced by 90%, the pollution resistance capability of the membrane is remarkably enhanced, and no disinfection by-product is produced in the water treatment application process.