102results about How to "Low water turbidity" patented technology

The invention relates to a waste salt resourceful treatment system which comprises a waste salt carbonization and pyrolysis system, a carbon-containing salt slag dissolving and filtering system and anevaporating and salt separating system in sequential connection, wherein the waste salt carbonization and pyrolysis system can carry out carbonization and pyrolysis treatment on waste salt I composedof sodium chloride, and sodium sulfate monomer salt or mixed waste salt and also can treat tail gas; the carbon-containing salt slag dissolving and filtering system can dissolve and filter the carbon-containing salt slag treated by the waste salt carbonization and pyrolysis system; and the evaporating and salt separating system can carry out evaporation and concentration, fractional crystallization and drying treatment on the strong brine treated by the carbon-containing salt slag dissolving and filtering system to obtain product salt. The waste salt resourceful treatment system takes industrial waste salt as the raw material, removes organic pollutant from waste salt and separates mixed inorganic salt to finally obtain an industrial second-grade salt product, so that recycling of waste salt is realized, and the flue gas generated during the production process is discharged after reaching the standard.

The invention discloses a dephosphorization flocculating agent and a preparation method thereof. The dephosphorization flocculating agent is formed by compounding an inorganic flocculating agent and an organic flocculating agent. The raw materials of the inorganic flocculating agent comprise sodium ferrate, borax, ferrous sulfate, silicate or aluminate; the raw materials of the organic flocculating agent comprise modified chitosan or modified polyacrylamide. The preparation process comprises the following steps: firstly adding a non-oxidizing acid into the silicate or aluminate to obtain a polysilicate colloid or an aluminum hydroxide colloid, then adding a borax solution and a sodium ferrate solution sequentially while stirring, further dropping a ferrous sulfate solution, mixing to form the inorganic flocculating agent, standing, then adding the modified polyacrylamide or modified chitosan into the inorganic flocculating agent, curing and adding the acid till the pH value is less than 7 to obtain the finished dephosphorization flocculating agent. The flocculating agent is suitable for a wide range of water quality, is little affected by co-existing salts, the pH value of sewage and temperature and is particularly effective for dye wastewater, oilfield sewage and the like.

The present invention discloses a nano powder-organic polymer composite flocculating agent, which is prepared by a nano powder and a cationic water-soluble organic polymer by weight, including 0.01 -2.5% of the nano powder, and 0.5-40% of the organic polymer, the balance being water. The invention is applicable to enhancement of industrial wastewater treatment, oilfield associated water treatment, urban sewage deepened treatment, and sludge dewatering treatment, and has a high treatment effect on oil, toxic organics, humus, color and other pollutants. The nano powder-organic polymer composite flocculating agent can strengthen solid-water separation, enhance sedimentation speed, reduce sludge volume, and reduce water outlet turbidity.

The invention relates to a treatment system for waste salt recycling treatment. The treatment system comprises a waste salt carbonization pyrolysis system, a coke-containing salt slag dissolving and filtering system and an evaporation and desalination system which are sequentially connected with one another, wherein the waste salt carbonization pyrolysis system can be used for carrying out carbonization pyrolysis treatment on waste salt I composed of sodium chloride monomer salt, sodium sulfate monomer salt or the mixed waste salt; the coke-containing salt slag dissolving and filtering systemcan be used for carrying out the dissolution and filtration operation on the coke-containing salt slag obtained after the treatment by the waste salt carbonization pyrolysis system; and the evaporation and desalination system can be used for carrying out the evaporation and concentration, fractional crystallization and drying treatment on strong brine obtained after the treatment by the coke-containing salt slag dissolving and filtering system, so that salt products are obtained. According to the treatment system, with the industrial waste salt as a raw material, organic pollutants are removedfrom the waste salt, desalination treatment is carried out on mixed inorganic salt, and finally the industrial secondary salt products are produced, such as anhydrous sodium sulfates, sodium chlorides, sodium bicarbonate and other finished salt, so that the recycling of the waste salt can be realized; and the system can be applied to the waste salt recycling treatment.

The invention discloses a sewage treatment device and a method of a SBR process. The device is provided with a reaction tank; an aeration head is arranged at the bottom of the reaction tank; and the aeration head communicates with a blower fan. The sewage treatment device is characterized in that an overflowing weir is arranged on the upper edge of the reaction tank; a central water distributor is vertically arranged in the middle of the reaction tank; the lower end of the water distributor communicates with a water inlet pump; a sludge discharge pipe communicating with a sludge discharge pump is arranged at the bottom of the reaction tank. The method which utilizes the device comprises the following steps: firstly, feeding water and draining the water; secondly, aerating; and thirdly, depositing and draining sludge. The sewage treatment device and the method are suitable for the sewage treatment of the SBR process, have the advantages of simple structure, and low manufacture and running cost, and can be completely built under the ground, thereby having no effect on buildings on the ground and no pollution to ambient environment.

The invention discloses a method for preparing a compound water purifying agent for emergency treatment of water pollution of a drinking water source, which comprises the following steps of: grinding concave soil raw ore into fine powder, and sieving by using a sieve with 100 to 300 meshes to obtain concave soil powder; calcining the concave soil powder at the temperature of between 350 and 500 DEG C for 1 to 5 hours, or radiating the concave soil powder by using microwaves with the power of 300 to 600W for 5 to 15 minutes to obtain modified concave soil; and mixing the modified concave soil and an inorganic polymer coagulant accounting for 5 to10 weight percent of the modified concave soil and potassium permanganate accounting for 1 to 5 weight percent of the modified concave soil in aqueous solution, stirring for uniform dispersion, drying, and grinding to obtain the water purifying agent finished product. The compound water purifying agent can obviously reduce the content of organic matters, algae toxins, heavy metals and the like in the water of the polluted drinking water source, the manufacturing cost is low, the operating process is simple, the sedimentation velocity is high, the sludge volume is small, the residues of inorganic reagents are a few, and the compound water purifying agent has chemical and biological safety and is a novel environment-friendly and high-efficiency water purifying agent for emergency treatment of the water pollution of the drinking water source.

The invention provides a nano ferric oxide-cationic polyelectrolyte coupled multielement composite flocculant, relating to an inorganic-organic composite flocculant. The invention provides a novel high-efficiency composite flocculant compounded by nano ferric oxide and cationic polyelectrolyte, wherein the nano ferric oxide is nano alpha-FeOOH, Fe3O4, alpha-Fe2O3, gamma-Fe2O3 and the like, and the cationic polyelectrolyte is polyamine, polyacrylamide, poly (diallyldimethylammonium chloride), chitosan and the like. The composite flocculant provided by the invention is applicable to micro-pollution water source strengthening treatment, the treatment effect on toxic and harmful pollutants (heavy metals, toxic organic matters and the like), humic acid and chromaticity is higher, and the composite flocculant provided by the invention has the advantages of good separating effect, rapid sedimentation, low effluent turbidity, wide pH application range and the like.

The present invention relates to a method for treating low-temperature low-cloudy water by utilizing high-density active sludge refluxing process, belonging to the field of water treatment technology. Said method includes the following steps: adopting external sludge refluxing system to make the chemical active sludge be lifted into feedwater pipe of reaction tank from sludge concentrated zone and mixed with primary water, then making them be passed through mechanical stirring mixing chamber and fed into reaction flocculating chamber, then adopting high-effective oblique plate precipitation process to produce complete, uniform and high-density alumen ustums from perforated wall to oblique plate precipitation zone and effectively implement sludge concentration so as to ensure stable water quality of discharged water.

A water treatment method combining flocculation, counter-current ozone air floatation and biofiltration in order and a device used in the method are disclosed. The device comprises a flocculation reaction zone, a counter-current ozone air floatation zone and a biofiltration zone which are connected in order. The flocculation reaction zone comprises two grades. One side of the first grade is connected to a water feeding pipe. A bottom outlet of the first grade is connected to an air floatation water distribution zone of the second grade. A water inlet pipe is disposed in the upper part of the counter-current ozone air floatation zone and connected to the air floatation water distribution zone. The top of the counter-current ozone air floatation zone is provided with a scum accumulating zone, the middle of the counter-current ozone air floatation zone is provided with a rectification filler, and the lower part of the counter-current ozone air floatation zone is provided with a plurality of air-dissolving water-releasing heads, a macroporous water collecting plate and a punched water collecting pipe. The water collecting pipe is communicated with a biofiltration water distribution zone. One side of the biofiltration zone is provided with the biofiltration water distribution zone, and the other side of the biofiltration zone is provided with a backwashing water collecting tank. The biofiltration zone is provided with an air-water backwashing system. The method and the device can effectively remove chroma, turbidness, microorganisms and various organic pollutants in water, and are suitable for drinking water treatment and sewage recovery and reutilization projects.

The invention relates to a sewage treatment and water quality early warning method of a microbial fuel cell coupling membrane bioreactor. When a specific sewage treatment and water quality early warning device is used, anaerobic sludge is inoculated to an anode chamber, aerobic sludge is inoculated to a cathode chamber, sludge concentration is 4000-12000mg / L, the hydraulic retention time of the anode chamber is 5-10 hours, the volume load of the anode chamber is 0.05-1kg COD (chemical oxygen demand) / (m<3>*d), the device continuously runs for a period of time, microorganisms in the anode chamber and the cathode chamber are stably generated on surfaces of electrodes, and then sewage is led into the device and treated. The sewage treatment and water quality early warning method can effectively solve the problems of low electricity generation and serious MBR (membrane bioreactor) membrane pollution of the device, and makes full use of electric energy generated by the device.

The invention provides an inorganic coagulant and a preparation method thereof. The inorganic coagulant is prepared from major raw materials including steel slag and pulverized fuel ash according to amass ratio of 8:2. The preparation method mainly comprises the following steps of raw material pretreatment, acidification treatment, alkalization treatment, mixing and drying. Through the technicalscheme, a large number of solid wastes are utilized; the environment is protected; the raw material sources are enlarged; the material cost is reduced; through acidification treatment and alkalizationtreatment, a multicomponent iron salt and aluminum salt mixed coagulant is obtained; the respective advantages of two coagulants are fully realized; the flocculation effect is improved; high adsorption capacity is realized, so that a better removal effect is achieved on hazardous substances such as chroma, macromolecular organic compounds and heavy metal ions.

An environment-friendly flocculant for treating tap water The flocculant is characterized by using poly aluminium trichloride solution, natural polymer polysaccharide solution and auxiliary agent A solution in a coordinated way, wherein the poly aluminium trichloride solution has mass percent of 0.1-1%; the natural polymer polysaccharide solution is dilute acid solution with mass content of 0.2-2%; the auxiliary agent A solution is compound solution of sodium hydroxide, sodium bicarbonate, aluminum chloride, montmorillonite and water; and the montmorillonite accounts for 5% of the total mass of the compound solution. The best volume ratio of poly aluminium trichloride solution to natural polymer polysaccharide solution to auxiliary agent A solution used by the flocculant is equal to 0.5-5:3-10:5-10. The flocculant has large flocculation particles and high sedimentation velocity and has removal rate of raw water turbidity up to 98.09%. The raw water turbidity can be within 3NTU, the national standard, through one-time treatment when the raw water turbidity is between 70NTU and 100NTU. The content of aluminum ions in the effluent is 57.5% less than the content of aluminum ions in the traditional flocculants, the medicines for treating the tap water are little, and the flocculant does not contain the components harming the human bodies and has excellent performance and stable quality.

The invention relates to a water treatment system for a scenic spot, which comprises an efficient circulation filtering system and a strengthening dephosphorization system, and a dosing device, a blending device, a lifter, a backwashing system, a balance pool and the alike, which are matched with the efficient circulation filtering system and the strengthening dephosphorization system. By integrating the updated filtering technique, the absorption technique for removing ammonia nitrogen, the dephosphorization technique, the algal removal technique and the medium regenerating technique, the system is an integrated water purification circulation treatment system with high efficiency.

The invention discloses a sludge self-circulation dispersed sewage treatment device applicable to a directly-discharged water body and a method of the device, and belongs to the technical field of sewage treatment. The sludge self-circulation dispersed sewage treatment device comprises an integrated reactor, wherein the integrated reactor is internally divided into an anoxic area, a sewage ascending area, a sewage descending area and a settling area; a first isolation plate is arranged between the anoxic area and the sewage ascending area; a second isolation plate is arranged between the sewage ascending area and the sewage descending area; and a third isolation plate is arranged between the sewage descending area and the settling area. The device adopts a sludge self-circulation nitrogen and phosphorus intensification elimination method which is applied to the directly-discharged water body, and through anoxic denitrification and chemical dosing auxiliary dephosphorization, the requirements on water effluent of one-class B in Municipal Sewage Treatment Plant Pollutant Discharge Standard (GB / T18918-2002) can be met. The biological reaction pool is high in sludge concentration, needs no sludge backflow facility, low in effluent concentration, simple and convenient in operation in sewage treatment and diverse in function, and unattended operation in a sewage treatment station is realized.

The invention discloses a system and a method for treating and recycling regenerative waste liquid of macroporous denitrification resin. The system comprises a resin adsorption tank, a sodium chloridedosing tank, a waste liquid pool, a denitrification pool, a MBR (membrane bio-reactor), a recycling water tank, a nano-filtration membrane assembly, a reverse osmosis membrane assembly and a sodium hypochlorite generator; a macroporous denitrification resin adsorption technology is adopted to treat and send tail water in a sewage plant to the resin adsorption tank, a sodium chloride solution is utilized to regenerate, the regenerative waste liquid is collected into the waste liquid pool firstly, then enters the denitrification pool, followingly enters the MBR, and effluent flows back into therecycling water tank; the effluent is conveyed to the nano-filtration membrane assembly, and used for preparation of new resin regenerative liquid, concentrated water is partially drained out with the effluent in the resin adsorption tank, the rest concentrated water enters the reverse osmosis membrane assembly to be treated further, 98% and above dissoluble salt is retained, the produced water is directly drained out, the concentrated water directly enters the sodium hypochlorite generator to be electrolyzed, a disinfector is generated to disinfect and sterilize the effluent of the resin adsorption tank, and treatment and recycling of the regenerative waste liquid of the macroporous denitrification resin are achieved.

The invention relates to a tail gas treatment system for waste salt recycling treatment. The tail gas treatment system comprises a two-time combustion chamber, a waste heat boiler, a quench tower, a bag dust collector, a precooler, a two-stage washing tower, a white flue gas elimination device, a chimney and a circulating water tank, wherein the two-time combustion chamber comprises an input end and a flue gas output end, the input end of the two-time combustion chamber comprises a natural gas input end, a pyrolysis gas input end and an ammonium hydroxide input end, the natural gas input end is connected with natural gas, the natural gas can be input into the two-time combustion chamber through the natural gas input end, the pyrolysis gas input end of the two-time combustion chamber is connected with pyrolysis waste gas of a pyrolyzing furnace, the ammonium hydroxide input end is connected with ammonium hydroxide, and the ammonium hydroxide can be input into the two-time combustion chamber through the ammonium hydroxide input end. The tail gas treatment system for the waste salt recycling treatment has the advantages that the connection of the structure is simple, the use is convenient, after the pyrolysis waste gas in the pyrolyzing furnace is treated, pollutants in flue gas can completely meet emission standards, the cost is low, the effect is good, and the system can be applied in the waste salt recycling treatment.

The invention relates to a compound tap water flocculating agent of environment-friendly chitosan quaternary ammonium salt and aluminum polychloride. The compound tap water flocculating agent is characterized by being composed of an environment-friendly chitosan quaternary ammonium salt solution and an aluminum polychloride solution. The compound tap water flocculating agent is prepared through the following steps: dissolving the chitosan quaternary ammonium salt to prepare the chitosan quaternary ammonium salt solution, adding glutaraldehyde to the chitosan quaternary ammonium salt solution while stirring, wherein the 1-4mol of glutaraldehyde is added into each liter of chitosan quaternary ammonium salt solution, and then reacting for 2-4h at a low temperature of 50-60 DEG C, and finally, slowly and dropwise adding the aluminum polychloride solution to the chitosan quaternary ammonium salt solution in the volume ratio of 1: (1-4), and finally, curing to obtain the compound tap water flocculating agent. The compound tap water flocculating agent of the environment-friendly chitosan quaternary ammonium salt and the aluminum polychloride is large in flocculated particles and high in settling speed; the removal rate of the compound tap water flocculating agent on the turbidity of raw water is 99.34%, which is slightly higher than a traditional flocculating agent; besides, the raw water having the turbidity in the range of 70-100NTU is treated once so that the turbidity can be up to the national standards and within 1NTU.

The invention provides a device for treating sewage by magnet intervention. The device comprises a coagulation reaction tank, a magnet powder reaction tank, a flocculation reaction tank and a magnet intervention rapid separation tank, which are connected in sequence through a pipeline, wherein a magnet recycling unit is arranged behind the magnet intervention rapid separation tank; a micro-magnet floc aggregate flowing out from the magnet intervention rapid separation tank is sprayed on a magnet roller of the magnet recycling unit through a pipeline; magnets on the magnet roller of the magnet recycling unit are collected and then directly enter a magnet powder storage pot; the magnet recycling unit comprises a magnet recycling barrel, the magnet roller and a magnet scraping plate; the lower part of the magnet recycling unit is connected with a sludge treatment system; the magnet intervention rapid separation tank comprises a separation tank body and a magnet disc; the magnet disc is provided with a scraping plate; the coagulation reaction tank, the magnet powder reaction tank and the flocculation reaction tank are connected with a coagulant storage pot, the magnet powder storage pot and a flocculating agent storage pot respectively. According to the device for treating the sewage by the magnet intervention, provided by the invention, the device for treating the sewage by the magnet intervention is simple in structure, easy to operate and high in production efficiency, and is particularly suitable for municipal and sudden emergency water treatment.

The invention discloses a device and a control method for safety guarantee of municipal sewage recycling. The device is provided with an ozone contact pool, a biological activated carbon filter pool and a clean water pool that are arranged and communicated front and rear in sequence, wherein the ozone contact pool is communicated with secondary treatment effluent; a granular activated carbon filling is arranged in the biological activated carbon filter pool; and a water inlet pipe is communicated with a water outlet pipe of the ozone contact pool. The device is provided with a fan, a back flushing gas and water pipeline communicated with the clean water pool, and a controller. The control method comprises the steps that 1), operating allowable value ranges of various measurement components and operating conditions of various equipment are set on the controller, and 2), the device for the safety guarantee of the municipal sewage recycling is started to operate. The device and the control method are applicable to the safety guarantee of municipal sewage recycling, and the device is perfect in structure, flexible to control, high in automation degree, and high in water treatment quality and water treatment efficiency.

The invention discloses an environment-friendly magnesium-ion modified montmorillonite tap water flocculant. The flocculant is prepared by a chitosan liquid and a magnesium-ion modified montmorillonite liquid; the chitosan liquid is an acetic acid liquid containing 0.2-2 mass percent of chitosan, and the magnesium-ion modified montmorillonite liquid is prepared by the mixing of sodium hydroxide, sodium bicarbonate, magnesium chloride, montmorillonite and water according to the mass ratio of 1:1:(1-4):(5-8):(86-92). The flocculant of the invention has large flocculation particles and fast sedimentation rate, the removal rate of raw water turbidity reaches 98.09 percent, and for the raw water with the turbidity of 70-100 NTU, the once treatment can be within 3 NTU of the national standards; and the cost is low, and the flocculant has no ingredients harmful to human bodies, and has excellent performance and stable quality.

The invention relates to an efficient decolorization process for a wastewater generated by brewing of white spirit. The process comprises the following steps: a brewing wastewater enters into an anaerobic tank after pretreatment, most of organic matters and a part of chromaticity are removed under the action of anaerobic microorganisms, and then enters an aerobic tank to further carry out oxygenolysis; a mixed liquor of the aerobic tank enters into a membrane bioreactor to carry out solid-liquid separation; suspending activated sludge in the mixed liquor is intercepted, so as to obtain clear water of which the turbidity is smaller than 1NTU; and finally membrane separation is carried out through a nanofiltration membrane or ultrafiltration membrane filter device, wherein the chromaticity of the clear water after membrane separation is 2-4 times, and superior to the 20-fold limiting value specified by the national standard GB27631-2011 table 3; and concentrated water after membrane filtration returns to an anaerobic and aerobic membrane bio-reactor (MBR) biological treatment system to continue to process. The decolorization process adopted by the invention can be designed in a modularized manner, is less in floor area, low in operating cost, and convenient to be accessed into the existing wastewater biological treatment system, and has important significance on upgrading and reconstruction of the existing white spirit wastewater treatment.

The invention relates to a high concentrated organic wastewater treatment system for a three-phase fluidization algae photobioreactor, which comprises a regulating reservoir and a reactor, wherein, the reactor comprises a reacting cylinder body, and a temperature detection device and a water quality detection device are arranged in the reacting cylinder body; a light source is arranged inside and / or outside the reacting cylinder body; the upper part of the reacting cylinder body is provided with an enlargement area, and the enlargement area comprises an effluent weir and an algae body outlet; the bottom of the reacting cylinder body is provided with a gas distribution device, and a frustum air inlet area is arranged below the gas distribution device; a water inlet and a water outlet are respectively provided with a sampling port and a flowmeter, and an air inlet is provided with a gas flow indicator. The system can be taken as a treatment device for high concentrated organic wastewater such as brewing wastewater, sugar wastewater and so on, is suitable for the treatment of small-scale high concentrated organic wastewater, is also suitable for the treatment of large-scale high concentrated organic wastewater, can realize the continuous operation of the process and the optimizing control of the whole process, and is easy to realize cooperative coupling operation with other treatment systems.

The invention discloses a three-phase fluidized-bed reactor. The three-phase fluidized-bed reactor solves the technical problems of poor gas-water mixing, difficult operation, undesirable solid-liquid separating effect and high effluent turbidity of an internal circulating three-phase fluidized-bed reactor. The three-phase fluidized-bed reactor comprises a gas-water mixing area, a reacting area, separating area and a filtrating area; the gas-water mixing area is, through a micro-porous gas distributor, communicated with the reacting area which is formed by an outer barrel and an inner barrel; a precipitating area and the filtrating area are formed outside the separating area on the top and communicated with each other through a perforated plate; the filtrating area is provided with a filtering component; and the filtrating component is connected with a water outlet and back wash system which comprises a water pump, a plurality of valves, a plurality of flowmeters and the like. The three-phase fluidized-bed reactor is characterized in that: the gas-water mixing area is shaped as a column; and the filtering component is a film component. The three-phase fluidized-bed reactor is used for treating the domestic sewage and the industrial effluent, so the municipal sewage is recycled to meet the municipal non-drinking water quality standards.

The invention discloses a method for coagulation-ion exchange-coagulation circulating reflux treatment of secondary effluent and belongs to the technical field of water treatment. By virtue of the coagulation-ion exchange-coagulation treatment process, the water quality of the effluent can be effectively improved, the floc particle size and the sedimentation speed in a coagulation unit are increased, and the using amount of a coagulant is reduced; the service life of resin can be prolonged. The process is stable in operation, and by adopting the process, the fluctuations in the water quality can be effectively dealt, the amount of treatment water is increased, and the operation cost is reduced.

The invention discloses a one-end-inlet high-efficiency water-saving reverse osmosis membrane assembly which comprises an upper end cover, a lower end cover, a central tube, a reverse osmosis membrane, a sealing membrane, a sealing adhesive tape, a sealing adhesive, a seal ring 1 and a seal ring 2, wherein the reverse osmosis membrane is wound on the central tube; the sealing membrane is wound outside the reverse osmosis membrane; the upper end cover is covered on the upper end of the central tube which is wound by the reverse osmosis membrane and sealing membrane, and sealed by the sealing adhesive; the lower end cover is covered on the lower end of the central tube which is wound by the reverse osmosis membrane and sealing membrane; and the gap between the lower end cover and reverse osmosis membrane is sealed by the sealing adhesive tape. The proportion of the discharge amount of the filtered pure water outlet to the raw water flowing into the membrane component can reach 1:2, thereby enhancing the water purification efficiency and performing the water-saving function. The reverse osmosis membrane assembly is simple in structure, lowers the cost of the product, and enhances the production assembly efficiency. The structure is simplified, thereby enhancing the sealing effect among various waterways, and reducing the possibility of the water mixing phenomenon in the prior art.

The invention discloses a drinking water treatment device based on an ultrafiltration device, which comprises a primary lift pump, a coagulation sedimentation basin, an ultrafiltration device and a clean water basin. A huge sand filtering basin in the traditional water making process is omitted. The water outlet of the primary lift pump is connected with the water inlet of the coagulation sedimentation basin. The water outlet of the coagulation sedimentation basin is connected with an adsorption reaction basin through a pipe. The water outlet of the adsorption reaction tank is connected with the water inlet of the ultrafiltration device through a water ultrafiltration pump. The water outlet of the ultrafiltration device is connected with the water inlet of the clean water basin. The drinking water treatment device based on the ultrafiltration device disclosed by the invention has the advantages that the filtering accuracy is high, the turbidity of outlet water is low and the quality of the outlet water is obviously promoted; various pollutants such as soluble organic matters, bacteria, viruses and the like can be removed from the water; the chlorine dosage can be reduced, the generation of chlorinated byproducts is avoided, the safety of drinking water is guaranteed, the taste of the water is further improved and the requirement of raising drinking water standards is satisfied; and the equipment investment is lower than the equipment investment of the traditional drinking water treatment process.

The invention discloses a high-COD (Chemical Oxygen Demand) phenol-containing sewage treatment method. Phenol is removed through pretreatment, suspended solids, organic pollutants, heavy metals and colloids are removed through coagulating sedimentation, so that the load of a subsequent working section is reduced. Through the electrochemical-photocatalysis-ozone synergy, the yield of active groupsin the treatment process is higher, and the oxidability is stronger. Mass transfer is promoted through an internal circulation structure, and the processing time is reduced. Residual phenols and otherorganic pollutants can be thoroughly removed, and meanwhile, the effect of releasing complex heavy metals is achieved. Most of heavy metal ions are removed through aeration-electric flocculation treatment, residual trace heavy metal, organic pollutants and part of inorganic salt in water are removed through filtration by a polyethyleneimine grafted nanofiltration membrane filter, and the water quality is improved. Finally, a two-stage reverse osmosis system is adopted for desalination, and the effluent quality reaches the standard of industrial reuse water.

The invention discloses a porous diatomite filter material. The porous diatomite filter material comprises, by weight, 40 portions of diatomite, 6 to 8 portions of a pore forming agent, 1 to 3 portions of a cosolvent and an appropriate amount of a binder. In addition, the invention also provides a preparation method and applications of the porous diatomite filter material. The porous diatomite filter material is large in specific surface area, possesses well-developed pores, is capable of reducing turbidity of waste water and removing organic substances effectively, and possesses acid resistance and impact resistance. The ability of reducing turbidity can be recovered just by back wash with water, and the ability of removing organic substances can be recovered by sodium hydroxide treatment.

The invention discloses an efficient phosphorus removal compound coagulant, belonging to the technical field of water treatment. The efficient phosphorus removal compound coagulant has a circle layer structure, wherein the outer layer is prepared from poly aluminium chloride, the inner layer is prepared from porous kieselguhr, and the holes of the kieselguhr are internally loaded with lanthanum chloride. The efficient phosphorus removal compound coagulant is prepared from the following materials by weight percent: 50-60% of the poly aluminium chloride, 40-50% of the kieselguhr, 0.5-1.5% of the lanthanum chloride and the balance of water. The efficient phosphorus removal compound coagulant disclosed by the invention has the special circle layer structure, thus improving the flocculation efficiency, increasing the coagulation of the reagent by more than two times and being good in phosphorus removal effect while overcoming the disadvantages of poor phosphorus removal effect, large adding amount and the like caused by singly adding the poly aluminium chloride.

Provided is multifunctional pressure type chemical purification equipment for oily sewage. The equipment comprises a housing (1) and is characterized in that: the housing (1) is provided with at least two mutually independent settling zones (2) and one filtering zone (12); an inlet end of a sewage inlet pipe (3) is connected with a pressure sewage pipe (4) and a dosing opening (9) is provided above the sewage inlet pipe (3); the bottom of the settling zones (2) are respectively provided with a sludge collecting zone; water in a clean water collecting zone (6) is collected by a pure water collecting pipe (7) and gathered at the upper part of the filtering zone (12); one end of an outlet pipe (8) communicates with a water straining zone (13) at the lower part of the filtering zone (12), while the other end is connected with subsequent equipment needing water; a backwashing pipe (15) is installed in the water straining zone (13), the water inlet end of the backwashing pipe (15) is connected with a backwashing water source, and the water outlet end of the backwashing pipe (15) is connected with a backwashing water inlet end of the filtering zone (12). The invention has the characteristics of simple construction, high treating efficiency, low turbidity of filtrated water, convenient manufacture of equipment, economical investment and high cost performance.