620results about How to "Stable water" patented technology

This invention relates to materials and processes for thin film deposition on solid substrates. Silica / alumina nanolaminates were deposited on heated substrates by the reaction of an aluminum-containing compound with a silanol. The nanolaminates have very uniform thickness and excellent step coverage in holes with aspect ratios over 40:1. The films are transparent and good electrical insulators. This invention also relates to materials and processes for producing improved porous dielectric materials used in the insulation of electrical conductors in microelectronic devices, particularly through materials and processes for producing semi-porous dielectric materials wherein surface porosity is significantly reduced or removed while internal porosity is preserved to maintain a desired low-k value for the overall dielectric material. The invention can also be used to selectively fill narrow trenches with low-k dielectric material while at the same time avoiding deposition of any dielectric on the surface area outside of the trenches.

The invention relates to an ultrasonic combined waste water treatment process of refuse leachate, relating to the technical field of waste water treatment and recycling of resources and environmental protection. The ultrasonic combined waste water treatment process of the refuse leachate comprises the following steps of: enabling waste water to enter a regulating pond; treating colloids, amphoteric substances and heavy metals in a coagulation sedimentation pond; eliminating ammonia nitrogen in an ultrasonic catalytic oxidation pond; sequentially sedimentating through biological treatment in an ABR (Acrylate Butadience Rubber) baffle plate anaerobic pond, a hydrolytic pond, a facultative pond and an aerobic pond; filtering in a CMBR (Chatter Membrane Bioreactor); eliminating waste gases and stench in a carbon filter pond; disinfecting in a contact disinfection pond; and filtering in an RO (Reverse Osmosis) membrane reverse osmosis system so as to obtain water meeting the requirements for emission standards. The invention also provides a treatment system for the ultrasonic combined waste water treatment process. The ultrasonic combined waste water treatment process and system can obtain the outflow water with stable quality by treating the refuse leachate; the treatment system has the advantages of small size and occupying area, high efficiency, low energy consumption and easy realization for mechanical-electrical integration control and management; and in addition, the invention is beneficial to the protection of the original landscapes of a construction party by adopting a non-buried type structure and also reduces the influence of the operation of the treatment system on an office area.

The invention belongs to the technical field of sewage treatment, and relates to a rural domestic sewage biological treatment system, particularly a rural domestic sewage biological treatment system which has the advantages of low capital construction and operating cost, small occupied room, convenient operation and management, high sewage treatment efficiency and discharge after reaching the standard. The rural domestic sewage biological treatment system provided by the invention is connected with a rural domestic sewage discharge pipeline. The rural domestic sewage biological treatment system is characterized by comprising an ecological open septic tank, a microaeration oxidation pond, a suspended substance biological filter, an artificial wetland and a scenic pond, wherein the ecological open septic tank, microaeration oxidation pond, suspended substance biological filter, artificial wetland and scenic pond are arranged from high to low and communicated through a pipeline or ditch; the sewage flows under the gravity; and the water inlet of the ecological open septic tank is connected with the rural domestic sewage discharge pipeline. The rural domestic sewage biological treatment system provided by the invention solves the problem of large occupied area, high investment and maintenance cost and the like in other rural sewage treatment methods.

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment tridimensional artificial wetland system that is used for the industrial waste water treatment of small-scale isolated pollution sources. The invention aims at providing a tridimensional artificial wetland system that is used for sewage treatment and that has small floor occupancy, high hydraulic load, high pollution load and long service life so as to overcome the defects of the current sewage treatment of big artificial wetland floor occupancy, low hydraulic load, low pollution load and short system service life. The key points of the invention are that: the artificial wetland for sewage treatment adopts a tridimensional assembled structure of vertical current artificial wetland and horizontal subsurface flow artificial wetland, and base materials are filled in various directions to form the tridimensional artificial wetland system for sewage treatment; the tridimensional artificial wetland system for sewage treatment comprises a water collecting header, a porous water-filtering vertical current artificial wetland bed, a first-stage regulating tank, a water drop chute, a grid tank, a second-stage regulating tank, a horizontal subsurface flow artificial wetland bed and a water collecting tank.

The invention discloses an ecological combined treatment method and device for rural distributed sewage. The method comprises the steps of A) rural sewage collection and pretreatment; B) treatment by a biological filter; C) treatment by an artificial wetland and a stabilization pond; D) ecological landscape configuration. The device is characterized in that a main water inlet pipeline is respectively connected with a lattice pool and a regulation pool, the regulation pool is connected with a horizontal flow biological filter through a water distribution pipe, the horizontal flow biological filter is connected with a vertical flow biological filter through a filter screen-water distribution pipe, the vertical flow biological filter is connected with a first-level artificial wetland via a perforated water collection pipe which is horizontally arranged, the first-level artificial wetland is connected with a second-level artificial wetland through an overflow weir, the second-level artificial wetland is connected with the stabilization pond through a straight flow water drain pipe, and a main water drain pipe is arranged at the tail end of the stabilization pond. According to the method, energy consumption is not required, the operation and the maintenance are simple and convenient, and the method further has the advantages of landscape effect, economic benefits, simple structure and low investment; high-efficient purification of rural distributed domestic and farming sewage is realized, and the removal rate of nitrogen, phosphorus, COD and the like in sewage is above 80% after treatment.

The invention discloses long-chain branched polyester and a preparation method thereof. The long-chain branched polyester is obtained by carrying out esterification and polycondensation on a diacid component A, a diacid component B and a bifunctional branching agent component C such as biglycidyl ester, diglycidyl ether or glycidol and the like. According to the invention, a non-toxic bifunctional branching agent is directly adopted to in situ generate branching points; the preparation method is unique, preparation process is simple and environmentally-friendly, branching reaction is uniform,branching degree is easy to regulate and control, and the high molecular weight long-chain branched polyester can be prepared; and the preparation method can be used for preparation of non-degradablepolyester and preparation of biodegradable polyester, thereby being beneficial to the realization of commercialization. The long-chain branched polyester has the characteristics of long-chain branching and large molecular weight in structure and is beneficial to increase of melt strength and improvements of blow molding and foaming processing performance.

The invention discloses a variable-volume improved A<2> / O deep nitrogen and phosphorus removal process for sewage, belongs to the field of urban sewage and industrial waste water treatment, and particularly relates to a deep nitrogen and phosphorus removal process for the sewage. Specific to the problem concerned with synchronous removal of organic matters and the problem of poor nitrogen and phosphorus removal effect in a conventional A<2> / O process, the process is characterized in that firstly, a pre-anoxic pool is arranged in front of an anaerobic pool to lower the influences of dissolved oxygen and nitric oxygen carried in returned sludge on the phosphorus removal effect, wherein 5-25 percent of sewage enters the pre-anoxic pool, and 75-95 percent of the sewage enters the anaerobic pool; and secondly, movable clapboards are arranged among the pre-anoxic pool, the anaerobic pool, an anoxic pool and an aerobic pool, and the volume ratio of each water pool can be adjusted flexibly according to the ratio of C:N:P in the sewage in order to change the hydraulic retention time of the sewage in each water pool. Meanwhile, the aim of deep nitrogen and phosphorus removal of the sewage is fulfilled under the condition that the inner reflux ratio is 100-200 percent and the sludge reflux ratio is 50-150 percent; and output water is stable, and reaches the national grade-A discharge standard.

The present invention relates to deep treating process of refinery waste water after initial treatment. Refinery waste water is deeply treated biologically with microbial flora comprising Pseudomonas sp., Zoogloea sp., Plesiomonas sp., Bacillus, Bacillus megaterium and Rhodopseudomonas globiformis in a biological aeration filtering pond and / or a bioreaction pond while controlling the intake water pH value in 6-9. The deep treating process has simple path, high safety, low power consumption, low running cost and other advantages, and the water output can reach the reuse standard stably including CODcr not more than 60 mg / l, oil not more than 2 mg / l, NH3-N not more than 2 mg / l and SS not more than 10 mg / l.

The invention provides a method for preparing a macroporous reticulated polyvinyl alcohol spherical vector. The method comprises the following steps: firstly, polyvinyl alcohol, calcium carbonate, sodium alginate and water are mixed in a certain mass proportion, and stirring is performed for full dissolution of the polyvinyl alcohol and uniform mixture, and then white PVA sol is obtained; secondly, the sol obtained is added into saturated boric acid solution containing 3 percent of calcium chloride by a peristaltic pump, and PVA gel beads are formed, cleaned by water and then placed into diluted hydrochloric acid solution for dipping until no air bubble is generated; thirdly, a spherical vector is thrown into glutaral pentanedial water solution and adjusted into acidity so as to generate crosslinking reaction to form a more stable crosslinking structure; and fourthly, the spherical vector is dipped into water and cleaned into neutrality, and then the white macroporous reticulated PVA spherical vector with elasticity is obtained. The macroporous reticulated polyvinyl alcohol vector prepared by the method has stable macroporous reticulated structure and good hydrophilicity, physical and chemical stability and anti-biological degradability, is suitable for immobilized enzymes and microorganisms so as to form a plurality of bed-shaped bioreactors, and is used in the modern bioengineering field such as sewage treatment and so on.

A method for increasing the recovering rate of crude oil includes preparing the mixed solution from polyacrylamide, foaming agent and water, and proportionally filling said mixed solution and gas or N2 in the water injecting well alternatively by the alternative period of 20 days.

The invention relates to a synthetic method for preparing colorless transparent alkyl polyglucoside, which comprises the following steps: adding glucosum anhydricum or glucose containing one crystal water and aliphatic alcohol with 8 to 20 carbon atoms into a reaction kettle in the weight ratio of 1:2.8-6.5; adding a composite catalyst containing dodecyl benzene sulfonic acid under the agitation of an emulsifying agitator; after undergoing a reaction for 4 to 8 hours at a temperature of between 80 and 120 DEG C under the vacuum condition of between -0.093 and -0.098 MPa, reducing the temperature to between 70 and 80 DEG C; adding neutralizer alkaline hydroxide, adjusting the pH value between 6 and 8 to obtain a flaxen mixture of alkyl polyglucoside and the aliphatic alcohol; and performing dealcoholization and blanching on the mixture to obtain a product of the colorless transparent alkyl polyglucoside. The method has a simple process and convenient operations. The process of the method not only can use the glucosum anhydricum, but also can use the glucose containing one crystal water, has a low cost and good quality; and the method adopts the composite catalyst, has a mild temperature, smooth water yielding and no phenomenon of foam overflow.

The invention discloses internal recycle multi-dimensional electro-catalytic wastewater treating equipment, which is characterized in that the wastewater treating equipment is provided with a cylindrical device which is internally provided with an inflow water distribution pipe, an aerator pipe, an electrode reaction region, a rectifying region, a water outlet region and a scum collecting region from bottom to top. The wastewater treating equipment of the invention integrates the electro-catalytic oxidation and air floating functions into a whole with good treating effect, low energy consumption and long electrode life.

The invention discloses a sewage treatment process and a special-purpose one-piece sewage treatment plant. The process comprises the following steps: 1) arrangement of a water inlet system: sewage input from an inlet pipe and pretreated by thick and fine gratings and a vortex-type grit chamber is sent into a biological reaction system; 2) arrangement of the biological reaction system: the biological reaction system is divided into an anoxic area, an anaerobic area, an aerobic area and a sedimentation area, and activated sludge in each area utilizes katabolism of microbes to converse organic matters into inorganic matters to realize nitrogen and phosphorus removal; 3) arrangement of the sedimentation basin: sludge and water in the treated sewage can be separated, so that the water outlet is clarified; and 4) arrangement of a disinfection tank: the treated water from the step 3) is disinfected to kill pathogenic organisms and then discharged through an outlet pipe. The invention also discloses a one-piece sewage treatment plant. The invention has the advantages of small land occupation, small investment, compact mechanism, low loss of a water head, low investment for the engineering project, optimized, stable and mature technology, good nitrogen and phosphorus removal effect and good organic pollutant removal effect.

Implementations of the present invention relate to systems, methods, and apparatus for filtering and treating water, such as tap water, well water, spring water, etc., and producing drinking, bathing, and swimming water. More specifically, such systems, methods, and apparatus can produce purified water by removing substantially all suspended as well as dissolved solids, undesirable acids, gasses and all and any contaminates from the water. Additionally, the systems, methods, and apparatus can produce reprogrammed high biophoton mineralized drinking water by chilling vortexing over proprietary lodestones, ingenious, sedimentary and metamorphic rocks and creating bicarbonate ions in the water introducing minerals and / or salts into the water.

The invention discloses a novel disulfonate type alkyl imidazole ionic liquid as well as a preparation method and application thereof. Structure of the ionic liquid is shown as formula (I), and the preparation method of the ionic liquid comprises the followings steps: trimethylsilylimidazole with structure shown as formula (II) is dropwise added to sultones with the structure shown as formula (III) for heat insulation reaction at the temperature of minus 20 DEG C to 30 DEG C, then water is dropwise added for continuing the heat insulation reaction to obtain an intermediate product (a zwitterionic compound) with the structure shown as formula (IV); an HY acid is dropwise added to aqueous solution of the zwitterionic compound to obtain a target product after full reaction at the temperature of 60-100 DEG C. The designed ionic liquid is hydrostable, almost has no steam pressure, especially has strong acidic properties, exhibits good catalytic activity when being applied to pechmann reaction, and a synthetic method thereof has environment-friendly feature, thus being expected to be applied to organic synthesis and catalysis fields as an environment-friendly solvent and catalyst.

The invention discloses a treatment method of nitrogen and phosphorus-containing waste water. The three-step treatment including magnesium ammonium phosphate reaction, biochemical treatment and deep treatment is sequentially performed on nitrogen and phosphorus waste water phosphorus containing high-concentration ammonium salt and phosphate; a great number of ammonium salts and phosphate can sequentially react with Mg<2+>; MgNH4PO4.6H2O is recovered to be reused as a slow-release fertilizer; through the biochemical treatment on primary treatment liquid supernatant containing low-content ammonium salt and phosphate, ammonia, nitrogen and partial PO4<3-> ions can be removed; finally, through Ca<2+> ions, a small number of PO4<3-> ions remained after the biochemical treatment can be treated;the outlet water stability can be ensured; the standard reaching discharging is reached.

The invention discloses a distributed domestic sewage treatment method. The method combines process units of anaerobic, jet oxygenation, biological oxidation, artificial wetland and the like together to perform anaerobic, aerobic and wetland ecological three-stage treatment on the domestic sewage so as to effectively reduce CODcr and BOD5 of the domestic sewage; and dephosphorization and denitrification are performed, and the effluent is stable and reaches the standards before emitting. A jet oxygenation pulse water distributor is adopted in the jet oxygenation, and the jet oxygenation pulse water distributor oxygenates the anaerobic effluent and provides pre-oxygenation treatment for a subsequent aerobic process; the biological oxidation is performed in a trickling filtration tower which is designed with 2 to 3 layers and provided with vent holes, a ceramic filler is placed in the trickling filtration tower, and the trickling filtration tower distributes water by adopting time control pulse so that the re-oxygenation effect of the trickling filtration tower can be improved and no power is consumed; and the artificial wetland is designed in an undercurrent form, proper fillers such as coal cinder, plaster, gravels and the like are placed in the artificial wetland, and pollutants can be further degraded and removed from the wetland environment. The method is suitable for standard-reaching treatment of rural or urban distributed domestic sewage.

The invention relates to a coke wastewater advanced treatment method utilizing a catalytic internal electrolysis technology and a coupled two-stage bio-filter. The method adopts a catalytic internal electrolysis method as the main processing technology to carry out a pretreatment on the coke wastewater biochemical effluent so as to improve the wastewater biodegradability, and then utilizes a two-stage bio-filter to carry out bio-processing to further degrade the pollutants in the wastewater. The method combines an electrochemical method and a biochemical method to degrade and remove pollutants in coke wastewater, thus has a high impact-resistant capacity, can remove COD, ammonia-nitrogen, and total nitrogen from the whole system at the same time, and greatly reduces the effluence color degree. The effluence processed by the method has a good water quality, and can stably meet the "emission standard of pollutants for coking chemical industry" (GB 16171-2012).

A landfill leachate treatment technology sequentially comprises the following steps: a landfill leachate automatically flows to an equalizing tank, and equalizing tank wastewater is pumped into a coagulative precipitation device; coagulative precipitation outlet water automatically flows to a Fenton oxidation device and undergoes a catalytic oxidation reaction; the pH value of wastewater obtained after the catalytic oxidation reaction is improved to about 10, heavy metals and iron ions in sewage are precipitated, the obtained supernatant is pumped into an ammonia nitrogen stripping tower, high-concentration ammonia nitrogen in the wastewater are stripped to a low concentration, and the pH value of the wastewater is adjusted to 7.0 to make the wastewater be suitable for biochemical treatment; the wastewater automatically flows to a two-stage A / O biochemical system; efficient composite nitrobacteria are directionally added to effectively remove ammonia nitrogen and total nitrogen; and outlet water is disinfected by ultraviolet to make various indexes reach discharge standards. The technology adopted to treat the landfill leachate has the advantages of stable reaching of discharge standards, low comprehensive investment and running cost, and no hidden trouble of secondary pollution.

The invention discloses a high-molecular weight long-chain branched crystalline polylactic acid material and a preparation method thereof. The preparation method comprises the following steps of: 1) adding 0.1 to 1 percent of protonic acid catalyst into aqueous solution of lactic acid or mixed solution of the aqueous solution of the lactic acid and silicon dioxide nano particle silica sol containing 0.1 to 10 weight percent of lactic acid, and dehydrating to obtain a product I; 2) adding 0.4 to 2 molar percent of dibasic acid or anhydride into the product I, and reacting to obtain a product II; 3) adding 0.1 to 1 weight percent of lewis acid catalyst into the product II, performing melt polycondensation, and adding 0.1 to 5 weight percent of crystallization accelerator to obtain terminal carboxyl group crystalline polylactic acid prepolymers; and 4) reacting diglycidyl ester and the terminal carboxyl group crystalline polylactic acid prepolymers in a molar ratio of 0.8:1-1.2:1 to obtain the high-molecular weight long-chain branched crystalline polylactic acid material. The preparation method has the advantages of simplicity, short reaction time, high efficiency, low cost and environmental friendliness and capability of contributing to realizing commercialization.

The invention discloses a bifunctional group ion liquid, which comprises the following steps: hydroxy and its derivant group, quaternary ammonium salt cation of sulfonic group and anion of sulfonic acid group or sulfate radical. The ion liquid is stable to meet water with fitful viscosity and low cost, which creates condition for further modified or fixed ion liquid.

The invention discloses a method for processing preserved szechuan pickle waste water by halophilic (haloduric) bacteria, which uses a compound bacterial flora mainly including microzyme, marinobacter and bacillus and combines an SBR technology to process the preserved szechuan pickle waste water so as to realize COD removing rate more than 90 percent within 24 hours. The method for processing the preserved szechuan pickle waste water has simple technology, stable water outflow and good load impact resistance and can realize the high-efficiency processing of the processing preserved szechuan pickle waste water with lower cost.

The invention relates to an electronic electroplating wastewater recycling advanced treatment technology. The technology uses a large amount of rinse-wastewater with heavy metals in the production process of the electronic electroplating industry as the main object, adopts a combined technology of pH adjustment-microfiltration membrane treatment-pretreatment-reverse osmosis membrane treatment, is mainly characterized by the joint application of DF membrane technology and RO membrane technology and can achieve the aim of reusing wastewater and reducing the emission of heavy metals; and the reuse water reaches the production demand of process water, thus saving the fresh water consumption of the industry, effectively reducing the production cost of the industry, solving the pollution problem of heavy metals, increasing the clean production level of the electronic electroplating industry and having remarkable social environmental and economic benefits.

The invention relates to a water-treatment device. The water-treatment device comprises a grating channel, a grit chamber, a biological rotating disc and a depth treatment system, wherein the grating channel, the grit chamber, the biological rotating disc and the depth treatment system are successively connected in series. The water-treatment device is characterized in that a self-priming pump is arranged outside the grit chamber, a water inlet of the self-priming pump is connected with a flexible pipe, and a water inlet of the flexible pipe is provided with a filtering nozzle; the filtering nozzle is connected with a floating ball, an outlet of the self-priming pump is connected with an inlet of a separation box, and an outlet of the separation box is connected with a water channel of the biological rotating disc through a water carrying pipeline; the biological rotating disc is positioned on the upper part of the water channel, and part of a biological disc piece is soaked in the lower part of a liquid surface of the water channel; a reflux pump is arranged outside the water channel, an inlet of the reflux pump is positioned in the middle of the water channel, and an outlet of the reflux pump is positioned in the bottom of the water channel; an outlet of the water channel is connected with an inlet of the depth treatment system. Compared with the prior art, the water-treatment device provided by the invention has the advantages that the peculiar smell is not generated, mosquitos and flies are not bred, the sludge output is small, the biological disc piece adopts a concave-convex plate, and the biomass is high; the whole denitrification effect is excellent; the total energy consumption is low; a condition that the water quality effluent can steadily achieve a standard is effectively guaranteed; the water-treatment device has the advantages that the structure is compact, and the operation and management are simple and convenient.

The invention discloses a treatment method of a concentrated solution produced from landfill leachate by a membrane method. The treatment method comprises the following steps of enabling the concentrated solution produced from the landfill leachate by the membrane method to sequentially pass through a composite softening coagulation and sedimentation pond, an ozone oxidation reactor, a hydrolyzing pond and an anaerobic MBR pond, and enabling effluent water from the anaerobic MBR pond to enter a nanofiltratoin system; enabling a permeation solution obtained through treatment of the effluent water in the nanofiltratoin system to be treated by a pressure contact oxidation reactor, and directly discharging the treated permeation solution, or after filtering the treated permeation solution by a multi-medium filter, discharging the filtered permeation solution; mixing a concentrated solution obtained after treatment by the nanofiltratoin system with the landfill leachate so as to obtain a mixed solution; and performing concentration treatment on the mixed solution by a biochemical method, an MBR method and the membrane method so as to obtain a concentrated solution, enabling the concentrated solution to enter the composite softening coagulation and sedimentation pond, and performing subsequent operations. The treatment method disclosed by the invention not only is suitable for treatment of the concentrated solution produced from the landfill leachate by membrane filtration, but also is suitable for treatment of other membrane concentrated solutions containing high concentration of organic compounds which are difficult to degrade.

The invention discloses an efficient treatment system and a treatment method for organic wastewater of bulk drug production in the pharmaceutical industry. The system comprises a high-concentration wastewater pretreatment unit, a triple effect evaporation unit, a biochemical treatment unit, a sludge pressure filtration unit and an activated carbon filtration deep treatment unit. By introduction ofa series of treatment means such as iron carbon reduction, catalytic oxidation, coagulation air floatation, triple effect evaporation, biochemical reaction and the like into the unit system, physicochemical treatment and biochemical treatment are combined together, removal efficiency of pollutants is increased, and the pollutants such as COD (chemical oxygen demand), ammonia nitrogen, SS (suspended solids) and the like in the wastewater are effectively degraded.

The invention relates to the wastewater multistage processing field, and particularly relates to a purifying device for wet-process flue gas desulfurization wastewater and a using method thereof. The purifying device for the wet-process flue gas desulfurization wastewater includes a wastewater regulation tank (1), and is characterized by also including a reaction flocculation tank (2), a precipitation tank (3), a first-stage fluorine removal reaction tank (41), a second-stage fluorine removal reaction tank (42) and the like. The using method of the purifying device for the wet-process flue gas desulfurization wastewater is characterized by successively comprising the following steps: a, adjusting the water quality and the water amount; b, carrying out Cr6<+> reduction and heavy metal ion reaction flocculation; c, carrying out first-stage precipitation; d, carrying out a fluorine removal reaction and COD degradation; e, carrying out second-stage precipitation; f, carrying out a neutralization reaction; g, carrying out sand filter processing; and h, draining water. The system operation is stable and reliable, the energy consumption is low, and the operation cost is low.

The invention provides a physicochemical and biochemical combined treatment method of fracturing backflow liquid. The physicochemical and biochemical combined treatment method comprises the following steps of: (1) introducing the fracturing backflow liquid into a regulating sedimentation tank, and controlling the pH value of the fracturing backflow liquid to 6-8, wherein the hydraulic retention time of the fracturing backflow liquid is 2-4 hours in the regulating sedimentation tank; (2) introducing a supernatant from the regulating sedimentation tank into a coagulation sedimentation tank, adding a polyaluminium chloride water solution and a polyacrylamide water solution to the coagulation sedimentation tank, depositing to remove suspended particles out of waste water inside the coagulation sedimentation tank, introducing the supernatant from the coagulation sedimentation tank into an intermediate tank, and regulating the CODconcentration of the waste water inside the intermediate tank to 800-1200mg / L; (3) treating the waste water from the intermediate tank into an aerobic fluidized bed membrane bioreactor in which biological membrane culture is completed, wherein the aerobic fluidized bed membrane bioreactor operates in a way of a continuous water feeding and continuous drainage under the condition of aeration, and the treated waste water is discharged after passing through the membrane assembly of the aerobic fluidized bed membrane bioreactor.

The invention provides a silicate long-persistence luminescent material and a preparation method thereof. The chemical expression of the luminescent material is Ba1-x-y-ZrSi3O9: Eux, Ry or Ba1-x-yHfSi3O9: Eux, Ry, wherein x is more than 0 and smaller than or equal to 0.05 and y is more than 0 and smaller than or equal to 0.05. The preparation method comprises the following steps of: weighing raw materials according to a stoichiometric ratio of all chemical components in the chemical expression of the long-persistence luminescent material; mixing and uniformly grinding all the raw materials to obtain raw material powder; after pre-sintering the raw material powder, calcining at a high temperature; cooling to a room temperature along a furnace to obtain a calcined product; and grinding to prepare the green long-persistence luminescent material. The luminescent material provided by the invention can emit bright green light, not only has excellent performances of an existing silicate long-persistence luminescent material, but also has persistence time equivalent with an aluminate long-persistence luminescent material; the preparation method is simple, has low pollution and has relatively low cost.

The invention discloses a combined process for treating papermaking waste water and particularly relates to a method for treating the papermaking waste water by combining anaerobic technology, aerobic technology and Fenton technology, in particular to a combined process disclosed based on the characteristics of high concentration, difficult degradation, high toxicity, large water quality fluctuation and the like of the papermaking waste water. The combined process comprises the following steps of: delivering papermaking waste water which is subjected to pretreatment such as precipitation, grid filtering and the like into an anaerobic reaction tank in a self-flow mode or a water pump lifting mode; delivering the waste water treated in the anaerobic reaction tank in the previous step into an aerobic tank in the self-flow mode; delivering the waste water into a Fenton oxidation column in a pump lifting mode; and delivering the waste water into a coagulative precipitation tank in the self-flow mode, adding polyacrylamide (PAM) for precipitation and draining the waste water. The combined process has the characteristics of high quality of drained water, small influence by toxic substances, high sludge settling performance, high market competitiveness and good environmental and social benefits and the like.