461 results about "Biological activated carbon" patented technology

A self-contained, portable water purification system, including (a) an ozone supply, (b) an ozone contact chamber for mixing a contaminated or potentially contaminated water stream with ozone generated by such ozone supply, (c) an ozone destruction unit for destructing ozone contained in the water stream and converting said water stream into an oxygen-rich and ozone-depleted water stream, and (d) a downstream biologically active carbon filter, for receiving such oxygen-rich and ozone-depleted water stream and biologically destructing at least a portion of contaminants contained therein.

The invention discloses a treatment method for high-concentration wastewater difficult to degrade. At the pretreatment stage, various pollution substances in wastewater are greatly degraded through the microelectrolysis reactor, Fenton reactor and multifunctional wastewater treatment machine combined mode, and meanwhile biodegradability of wastewater is regulated; at the biodegradation stage, most of pollution substances in wastewater can be treated and degraded by adopting the A2O and AO treatment process, conducting anaerobic, hypoxia and aerobiotic one-time biochemical and anaerobic and aerobiotic two-time biochemical treatment on wastewater and conducting ceaseless closed-loop inner circulation in the biochemical interior; at the after-treatment stage, by means of the multifunctional biological filter, multi-medium filtration and biological activated carbon adsorption combined treatment process, remaining pollution substances in wastewater can be degraded to the maximum extent or degraded after being adsorbed, and finally discharge water reaches the qualified emission target. The method is wide in application range, good in treatment effect and low in running cost, physical and biological treatment of high-concentration wastewater difficult to degrade is enhanced, and pollution of wastewater to the environment is reduced.

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

The invention relates to an advanced dyeing wastewater treatment and reclaimed water reuse system and a method thereof. The system consists of a regulating tank (2), a coagulation tank (3), a preliminary sedimentation tank (4), an acidification hydrolysis tank (5), a deep well (6), a deaeration tank (7), a secondary sedimentation tank (8), a biological activated carbon tank (9), a sludge concentration tank (10), a sludge dewatering tank (11), a filter tank (12) and an ozone oxidation tank (13). The method comprises the following steps: wastewater is sent to the regulating tank, the coagulation tank and the preliminary sedimentation tank, then sludge is returned to the coagulation tank, excess sludge is discharged to the sludge concentration tank, clarified water flows to the acidification hydrolysis tank, is sent to a deep well aeration tank and then sent to the secondary sedimentation tank; and the obtained clarified water is discharged after meeting the standard, or flows to the biological activated carbon tank and is treated for production. The system and the method have the advantages of simple process, low operating cost, high stability and reliability, convenient operation, and realization of automation control. Most of the wastewater discharged is reused in production after the treated wastewater meets the standard, thus reducing emission of pollutants, being capable of eliminating environmental pollution resulting from the wastewater and protecting environment.

A self-contained, portable water purification system, including (a) an ozone supply, (b) an ozone contact chamber mixing a contaminated or potentially contaminated water stream with ozone generated by such ozone supply, (c) an ozone destruction unit for destructing ozone contained in the water stream and converting said water stream into an oxygen-rich and ozone-depleted water stream, and (d) a downstream biologically active carbon filter, for receiving such oxygen-rich and ozone-depleted water stream and biologically destructing at least a portion of contaminants contained therein.

The invention provides a treatment method for recycling complex waste water in the coal chemical industry and relates to recycling technologies for enhanced pretreatment, biochemical treatment, deep purification and regeneration process of waste water. The invention provides the process scheme as follows: first enhanced pretreatment for the complex waste water in the coal chemical industry is carried out by using the combined process of air floatation, Fenton oxidation and ferric-carbon micro-electrolysis, so as to improve the biodegradability of the waste water; then the waste water is poured into a biochemical system comprising a hydrolyze acidification zone pool, an anoxic pool and an aerobic pool; the biodegraded water is discharged into a deep purification system with the function ofozone-biological activated carbon filtration, so that materials which are difficult to degrade are further removed, and the discharged water can be used for green spaces and other landscapes; after that, most of salt ions are removed by using a regeneration recycling system with the functions of multi-media filtration, ultrafiltration and reverse osmosis, so as to obtain water can be reused for production.

The invention discloses a composite biological activated carbon and a rapid preparation method thereof, raw materials thereof comprise coconut shell, bamboo, rice hull, sawdust, wheat straw or rice straw, or the raw materials thereof comprise the rice hull, the sawdust, the wheat straw or the rice straw, corn stalk or corn core, the raw materials are smashed to prepare columnar granules, the direct heating method of the spontaneous combustion type granules is adopted for preparing the carbon, a fixed layer is paved at the bottom of a furnace by taking the granules as the raw materials, the fixed layer is ignited by using ignition materials, the feeding is adopted at the upper part of the furnace and the air induction is carried out at the lower part of the furnace for accelerating carbonization of the granules, the air induction is stopped after the carbonization of the granules, the temperature in the furnace is kept at 430-700 DEG C, the spray cooling method is adopted for activatingand cooling the granular carbon, and a finished product is prepared after 20-30 minutes. A plurality of raw materials are mixed, and more pores are naturally formed, thereby expanding the specific surface area of the carbon, greatly increasing effective micropores, leading the absorption performance to be greatly better than the existing activated carbon of single material and reflecting the unique advantages of the composite material.

The invention discloses an integrated circulating water culture system which comprises a culture water tank, a foam separation and degassing chamber, a biological active carbon nitration reaction chamber and a low-pressure gas dissolution chamber, and is characterized in that: one part of water from a water drainage structure of the culture water tank is discharged and led into a biological flocculating constituent culture pool from the bottom of the culture water tank, and the other part flows into the foam separation and degassing chamber through an overflow hole at the upper part of the culture water tank; the suspended particles in the culture water are adsorbed by the micro bubbles of the foam separation and degassing chamber and rise to the top of the foam separation and degassing chamber to be discharged out; the culture water flows into the biological active carbon nitration reaction chamber through the foam separation and degassing chamber and is purified by a nitration biomembrane of the biological active carbon nitration reaction chamber and drawn out from the bottom of the biological active carbon nitration reaction chamber; 90% of the culture water drawn out is directly fed into the low-pressure gas dissolution chamber, and 10% of the culture water is fed into a pipeline mixer to mix pure oxygen and ozone and then fed into the low-pressure gas dissolution chamber; and the processed culture water flows back to the culture water tank from a drainage hole at the bottom of the low-pressure gas dissolution chamber.

The invention discloses a method for applying pre-ozonation and aerated biological activated carbon processes to feedwater treatment. The method combines ozone pre-oxidation, an aerated biological activated carbon filter tank and a coagulation-sedimentation-sand filtering-disinfection conventional feedwater treatment process to produce drinking water, is a feedwater treatment process for improving water quality of feed water aiming at micro-polluted drinking water sources, and integrates the characteristics of an aerated biofilter biological pre-treatment process and an ozone biological activated carbon advanced water-purifying process. Raw water enters a pre-ozonation contact tank, a coagulation sedimentation tank and the aerated biological activated carbon filter tank orderly, is disinfected, enters a sand filtering tank, and finally flows into a clear water tank. Because the pre-ozonation contact tank and the aerated biological activated carbon filter tank are arranged in the conventional feedwater treatment process, the effect of removing organic matters, ammonia nitrogen, pathogenic microorganism, odor, chroma and the like is greatly improved, and the water quality safety of the method is obviously superior to that of the biological pre-treatment process and the ozone biological activated carbon advanced water-purifying process.

The invention discloses an advanced treatment system of coking wastewater. The system mainly comprises an ozone generator, a catalytic ozonation reactor, a gas-liquid separation device, a bumper post, a biological activated carbon reactor and a tail gas absorption device, wherein the catalytic ozonation reactor has a three-section repeating structure; and each repeating structure section is divided to three subsections from bottom to top, namely an ozone absorption section, a catalyst bed layer and a catalytic reaction section. The three-section superimposing mode is utilized to intensify themass transfer function of ozone in the solution and increase the utilization rate of ozone; and the catalytic ozonation technology is adopted to increase the biochemical quality of coking wastewater,increase the treatment efficiency of the subsequent biological activated carbon technology and realize the aim of the high-efficiency advanced treatment of coking wastewater.

The invention discloses a method for treating underground sewage, in particular for the underground water which is polluted by nitrobenzene and aniline. The original restoration of the underground water with chemical and biological combination reaction wall is adopted in the method. The upper reach of the flowing underground water is provided with a chemical reaction wall, and a biological reaction wall is arranged below the chemical reaction wall with a certain distance away. The chemical reaction wall consists of nonvalent ferrum and active carbon at a certain proportion, and the biological reaction wall consists of the attached nitrobenzene degradation bacteria and the attached aniline degradation bacteria biological active carbon. The nitrobenzene is reduced to be the degradable nitrobenzene through the chemical reaction wall, and the nonvalent ferrum is good in the removal of the nitrobenzene organism which is difficult in degradation, so the chemical reaction wall has good applicability and can achieve 120-minute reaction time and the 97.4 percent of the reduction rate for the nitrobenzene. The production of the biological reaction wall with the biological active carbon is good in the removal of the target pollutant. The work of the biological reaction wall for 36 days can achieve more than 98.83 percent of the degradation rate for the nitrobenzene with the preliminary density of 300.89mg / L, and the work of the biological reaction wall for 71 days can achieve more than 99.6 percent of degradation rate.

The invention discloses a deep purification and reclaiming device and method for dyeing waste water, wherein the device comprises a regulating reservoir, an naerobic tank, an aerobic aeration tank, a sedimentation tank, a chlorine peroxide oxidation tank, a medicament administration and coagulation tank, a biologically active charcoal tank and a fiber ball filter. The waste water treatment method integrates a biochemical treatment process and a physical-chemical treatment method.

The invention relates to a combined anoxic / aerobic enhanced biological activated carbon dynamic membrane nitrogen and phosphorus removal process. Enhanced biological activated carbon is cultured by using a microorganism inoculation and acclimatization method; and after domestic sewage is treated, effluent is filtered by a dynamic membrane which is pre-coated with the enhanced biological activated carbon. Powdered activated carbon is added to maintain the high sludge concentration in a reactor. The high sludge concentration can reinforce endogenous denitrification; the problem of nitrogen and phosphorus removal in a treatment process is solved by using a biological phosphorus removal process of the aerobic phosphorus uptake of phosphorus-accumulating bacteria synthetically; the solid-liquid separation of mixed liquid is realized by using the high-efficiency entrapment capability of the dynamic membrane, so that the effluent is filtered. The reactor used by the invention has the advantages of compact structure, simple construction, high contamination removal efficiency and convenient operation, management and maintenance. In the process, advanced nitrogen and phosphorus removal treatment can be performed under the condition of not adding extra carbon sources, and the effluence can meet the national recycled water standard. Dominant bacteria such as loss-easy nitrifying bacteria, denitrifying bacteria, phosphorus-accumulating bacteria and the like are grown in a way that the bacteria are attached to the surface of the powdered activated carbon. The enhanced biological activated carbon dynamic membrane has the advantages of large flux, short hydraulic retention time and capability of improving treatment efficiency.

A process for removing pollutant from water features use of an activated carbon catalytic ozone oxidizing unit and a biologic activated carbon unit, and includes introducing the water to be treated and the ozone to the activated carbon catalytic ozone oxidizing reactor, mixing, flowing up, staying in activated carbon layer for 5-30 min for removing or converting the organic pollutants, flowing inthe biologic activated carbon reactor, and staying for 5-90 min for removing and degradating the organic pollutant. Its advantages are high utilization rate of ozone and high effect.

The invention relates to a sewage treatment method. The method is as below: sending domestic sewage into an oil separator through a machinery grating, and then sending the sewage into a hydrolysis-acidification pool to decompose macro-molecular organic matters in the sewage into micromolecular organic matters, so as to remove part of COD; sending the sewage into a primary settling tank to concentrating sludge and discharging the sludge into a sludge storage tank; sending an upper clarified liquor into an anoxic biochemical pool; carrying out an denitrification reaction on the sewage and a nitrated liquid flowing back from an aerobic biochemical pool; introducing effluent into the aerobic biochemical pool for aerobic biochemical reaction, and sending the other part of the sewage into a secondary settling tank through an overflow weir; concentrating the sludge, discharging the sludge into the sludge storage tank and flowing the upper clarified liquor into a clear water tank; part of the sludge in the sludge storage tank flows back to the hydrolysis-acidification pool; and conveying clear water to a biological active carbon reactor, flowing outlet water into an ozone contact pool and disinfecting the water outlet for reuse. The method has stable treatment effect, generates a small amount of sludge; residual sludge returns to the nature; and treated sewage is reused in water-scenery and greening, so as to save sewage charge and reduce environmental pollution.

The invention provides a biological activated carbon fiber, an ecological carbon fiber composite comprising the same and a preparation method thereof. The preparation method of the biological activated carbon fiber comprises the steps of, after polyacrylonitrile fibre, the viscose fiber and the pitch fiber to 200 to 300 DEG C in the rate of 3 to 5 DEG C / min, performing preoxidation treatment for 50 to 150 min and to form a preoxidized fiber; in a nitrogen atmosphere, gradually warming the preoxidized fiber to 700 to 800 DEG C in the rate of 10 to 30 DEG C / min, performing charring and activating treatment for 30 to 90 min using water vapor as an activator, to form the biological activated carbon fiber. The specific surface area of the biological activated carbon fiber is more than 1000 m2 / g and is reasonable in pore size distribution and high in adsorbability. By adopting the biological activated carbon fiber in sewage disposal, a membrane structure can be formed and the removal rates of CODcr and ammonia nitrogen can both be evidently enhanced after membrane formation.

The invention discloses a front, middle and rear ozone and central aerated biological activated carbon water supply treatment method. The method comprises the following steps: (1) causing raw water to enter a front ozone contact pool, and introducing ozone into the pool for preoxidation; (2) adding a coagulant and a coagulant aid into effluent in step (1), sufficiently mixing and carrying out coagulation reaction and precipitation in a coagulation precipitation pool; (3) introducing effluent in step (2) into a middle ozone contact pool, and introducing ozone into the pool for oxidation; (4) introducing effluent in step (3) into an aerated biological activated carbon filter, and blasting and aerating the filter; (5) adding chlorine into effluent in step (4), then entering a rear ozone contact pool, and introducing ozone into the pool to disinfect; and (6) causing effluent in step (5) to flow into a sand filtering pool, and filtering killed microorganisms and residual turbid matters in water to obtain treated clear water. In the method, an ozone adding mode is optimized, and the sand filtering pool is brought up the rear, thereby improving the effects on removing ammonia nitrogen and organic matters and killing microorganisms as well as lowering the total ozone adding rate.

The invention discloses a system and a method for deeply treating chemical wastewater and biochemical tail water, belonging to the technical field of wastewater treatment. The system comprises a physicochemical treatment system and a biochemical treatment system, wherein a distribution reservoir, a coagulating reaction tank, a sedimentation tank, an ozone oxidation reactor and a buffering tank in the physicochemical treatment system are connected in sequence; and the biochemical treatment system comprises a biological activated carbon filter, a drain tank and a sludge thickening tank. In the method, the pH value of the wastewater is regulated, and then, effluent is obtained after being sequentially subjected to coagulation, sedimentation, ozone oxidation and biological filter treatment, wherein part of sludge can be used as a catalyst to be recycled. Potassium permanganate and aluminum salt are used as a pre-oxidant and a coagulant, and manganese dioxide generated through reaction is used as an oxidant, an adsorbent, a catalyst and a reaction crystal nucleus, so that organic matters are further degraded, and the sludge settleability is improved. The effluent obtained through treating the wastewater by using the method disclosed by the invention can completely conform to the grade-A discharge standard of a wastewater treatment plant.

The invention discloses a treatment method for wastewater containing high-concentration organic phosphorus against the wastewater produced by a water treatment agent enterprise, which contains dozens of organic phosphorus scale inhibitors and corrosion inhibitors. Outlet water can stably achieve the requirements of a water pollutant comprehensive emission standard through the following design: the wastewater with high-concentration organic phosphorus firstly passes through 'a coagulation and sedimentation tank 1, a fenton oxidation tank and a coagulation and sedimentation tank 2' for pretreatment, further enters 'anaerobic, anoxic, aerobic and sedimentation tank' biochemical treatment systems and finally passes through 'coagulation and sedimentation tank 3, biological activated carbon powder tank, sedimentation tank, reverse mineral sand filter tank and clear water tank' post-treatment systems. The treatment method disclosed by the invention solves the industrial difficult problem that the treatment of the wastewater containing high-concentration organic phosphorus, which has complex components and high content of organic phosphorus, does not achieve the standard; furthermore, the treatment effect of the method is stable, and the operation cost is economic and reasonable; and in addition, a precipitate taking calcium phosphate as a main component, which is produced in the coagulation and sedimentation tank, can be sent into a phosphate fertilizer plant as a raw material for producing a phosphate fertilizer.

The invention discloses a method for preparing biological activated carbon by hydrothermal carbonization of algae residue / algae sludge.The method includes the following steps: (1) mixing the algae residue / algae sludge with water prior to putting the mixture into a reaction kettle, performing heating reaction under the pressure less than 6 MPa and at the temperature of 160-220 DEG C for 2-20 hours, and naturally cooling to the room temperature; (2) subjecting a hydrothermal product obtained in the step (1) to filtration or centrifugal separation to obtain solid, and washing the solid; (3) drying the product obtained after washing in the step (2) at the temperature of 50-60 DEG C to obtain the biological activated carbon.Plenty of algae residue can be disposed highly efficiently as well as be utilized to turn waste into treasure; harm brought by the algae residue and algae toxins is reduced, and high efficiency and environmental friendliness are realized.

The invention relates to an ecological-floating-bed-based water body ecological restoration method which comprises the following steps: 1) establishing an ecological floating bed, adding biological activated carbon into each growing basket, and suspending rope-shaped carbon fiber ecological grass on the bottom of the floating bed; 2) growing emerging plants in a first aquatic plant growing region, wherein the emerging plants are composed of more than two of Canna generalis, Thalia dealbata, Iris wilsonii, calamus, purple loosestrife, bamboo reed, reed, cyperus altrnlifolius and Pontederia corda; growing a floating leaf plant or submerged plant in a second aquatic plant growing region, wherein the floating leaf plant is Ludwigia stipulacea, and the submerged plant is watermilfoil; and 3) reaping: carrying out periodical reaping according to the growth condition of the aquatic plants. The multiple ornamental plants and plant species with higher synergic decontamination capacity are reasonably blended and grown to establish a stable floating bed phytocommunity, thereby enhancing the synergistic actions among organisms, enhancing the restorability of the ecological floating bed for the water ecological environment, effectively enhancing the purifying effect of the ecological floating bed, and having stabler purifying effects.

The present invention relates to a sewage regeneration treatment process for oil-refining industry and petro-chemical industry. Said treatment process system includes suspension filler biological contact oxidation depth treatment, flocculating setting quartz sand filtration, ozone partial oxidation, biological active carbon and disinfection treatment units. Its application range is extensive, operation stability is good, impact resistance is strong and pollutant-removing efficiency is high. It not only can completely remove SS of outward-discharged water, its turbidity, can effectively reduceCODcr, NH3-N, BOD5, oil, sulfide and phenol, etc., but also has the obvious effect for removing macromolecular organic matter, and can completely remove colour for water, and its energy consumption is low, its regenerated water is good in quality.

The invention discloses an aquatic product culture waste water processing apparatus, which comprises a three-stage settlement filter tank, a water inlet pump is arranged outside the three-stage settlement filter tank, three groups of filter layers are arranged in the three-stage settlement filter tank; culture sewage is introduced in the three-stage settlement filter tank for sedimentation and filtration through the water inlet pump, then is introduced in an oxidation absorption pool, the oxidation absorption pool is divided into a left space and a right space by a separator plate, an ecology carbon fiber filling layer is arranged in the left space, a netted support bracket and a biology active carbon filling layer are arranged at the right side, water through oxidation, absorption and filtration is introduced in a disinfection oxygenation pool through the netted support bracket; an ultraviolet ray sterilization apparatus is arranged at the inner top of the disinfection oxygenation pool, a Y-shaped aeration pipe is arranged in the disinfection oxygenation pool, and is communicated with a blower outside the disinfection oxygenation pool through an air inlet pipe. The aquatic product culture waste water processing apparatus integrates the functions of mechanical filtration, chemical filtration and biofiltration, the culture waste water is purified and processed to recyclable water resource without pollution, pollution on natural water can be effectively avoided, water source is saved, and the aquatic product culture waste water processing apparatus promotes the healthy development for the aquaculture industry.

An ozone photocatalysis-biologic activated method for deeply cleaning water features use of an ozone photocatalytic unit and a biologic activated carbon unit, and includes introducing the water to betreated and ozone to the ozone photocatalysis reactor containing ultraviolet lamp and photocatalyst, mixing, staying for 1-20 min, flowing in biologic activated carbon reactor, and staying for 10-80 min to degradate and remove organic pollutant. Its advantage is high effect.

The invention provides a deep treatment method for landfill leachate. The method is characterized by specifically comprising the following steps of: sequentially carrying out electrolytic treatment in ferric carbon, fenton oxidation treatment, coagulation precipitation treatment, biological activated carbon filtering treatment and ozone catalytic oxidation treatment on the landfill leachate, and discharging water. According to the deep treatment method, partial pollutant can be directly removed from the ultra-filtrated discharged water when the landfill leachate is treated due to the oxidizing and reducing functions of the electrolysis in the ferric carbon and the fenton reagent respectively, the molecular structure of the pollutant which is hard to degrade can be destroyed, and the biodegradability of wastewater can be improved; and the pollutant which can be biochemically treated can be further removed by a biological carbon filtering pool, the pollutant which is hard to degrade can be finally removed due to the ozone catalytic oxidation, and the discharged water can be guaranteed to reach the standard stably. The deep treatment method has the advantages of being low in investment and operation cost, stable and good in treatment effect, free from secondary pollution and the like.

The invention discloses a water treatment method for recycling bath sewage using biological active carbon which comprises the steps of, (1) coagulating sedimentation and filtering, (2) entering immobilization biologically active charcoal reactor, (3) membrane filtering, (4) UV sterilization, wherein the immobilization biologically active charcoal reactor is provided with activated charcoal fixed by engineering bacterium, which is selected from anionic surface active agent degradation bacterium and / or degraded COD bacterium and / or nitrated bacterium.

The invention relates to a water treatment method for an O3 / H2O2 / multiphase-Fenton combination, in particular to the water treatment method which can generate OH by a plurality of channels, which includes the following contents: the filtered water treated with the traditional water treatment technique is input into an ozone contact tower for ozone oxidation reaction; the water after ozone oxidation is added with hydrogen peroxide to react for a period of time; the yeilding water oxidized by O3 / H2O2 is input in a catalyst bed for staying for a period of time, the interior of the catalyst bed is stuffed with hydroxyl oxidize iron or carrier type hydroxyl oxidize iron; the water oxidized by O3 / H2O2 / multiphase-Fenton is sent into a biological activated carbon filtering bed for biological treatment; after the biological treatment, the water carries out chlorination disinfection and then enters a municipal network pipeline. The principle of the water treatment method of the O3 / H2O2 / multiphase-Fenton combination is as follows: after the O3 / H2O2 oxidation process, the residual H2O2 is taken as the H2O2 source for the following treatment technique, and the hydroxyl oxidize iron or the carrier type hydroxyl oxidize iron is introduced into the system to form an O3 / H2O2 / multiphase-Fenton system, thus generating the OH with strong oxidizability again.

A process for deeply cleaning drinking water by immobilized bioactive carbon includes such steps as coagulating-depositing, filtering, ozone treating in ozone contact tower, treating by the engineering microbes immobilized activated carbon column in reaction tower and ultraviolet disinfecting.

The invention relates to a treating technology for reverse osmosis (RO) concentrated water after water reuse in a chemical membrane method. The technology comprises the steps that firstly, matter such as lime or sodium hydroxide which is alkaline in an aqueous solution is put in RO concentrated water effluent to enable the pH of the concentrated water to be about 10-11.5; secondly, flocculent precipitation is performed in a mechanical accelerating clarification tank to reduce the hardness of the wastewater and remove heavy metal and reducing metal ions; thirdly, the effluent directly enters an ozone reaction tank after the RO concentrated water passes through the mechanical accelerating clarification tank, and then ozone tank effluent enters a biological activated carbon filter bed device to further remove pollutants and turbidity in the RO concentrated water, so that the wastewater effluent can meet the national primary standard (the CODcr is smaller than or equal to 60 mg / L). According to the treating technology, further treatment is performed on the concentrated water generated after the water is reused through the front stage of biochemistry, ultrafiltration and reverse osmosis for the production wastewater in chemical industry to achieve the purpose of direct discharge, therefore, the pollution treatment ability of enterprises can be improved, the total pollutant discharge amount is reduced, and the effects of energy conservation and emission reduction, clean production and sustainable development are achieved.

The invention relates to a method for synthesizing a beta-SiC nanometer line. The beta-SiC nanometer line is formed on the surface of a biological activated carbon sheet through carbothermic reduction reaction at 1,200-1,400 DEG C with SiO produced by the reaction of diatomite and silicon powder at a high temperature as a silicon source and the biological activated carbon sheet as a carbon source. The used biological activated carbon sheet can be obtained from bamboo, wood and other natural renewable plants by carbonization; and the raw materials are easily accessible and the cost is low. The biological activated carbon has high specific surface area and high surface activity, and can react with SiO at a relatively low temperature to obtain the beta-SiC nanometer line. The naturally existing metal ions in the biological activated carbon can be used as a catalyst to promote the growth of the beta-SiC nanometer line. The application of the biological activated carbon sheet can prevent formation of granular SiC, and provides favorable conditions for preparation of high-purity beta-SiC nanometer lines.