5963 results about "Suspended matter" patented technology

The invention discloses a textile dyeing wastewater advanced treatment recycling technology. The technology comprises the following steps: filtering to remove textile fibers; cooling; neutralizing, degrading organic matters and decomposing, replacing or degrading (cracking) the chormophoric groups of the organic matters to reduce the chroma of the wastewater; performing biochemical treatment with the biomembrane; precipitating to ensure that the precipitated sludge enters a sludge treatment system and the supernatant enters a flocculation pool; performing chemical treatment, namely adding a medicament in the flocculation pool to remove the suspended matter (SS), CODcr (chemical oxygen demand), BOD (biochemical oxygen demand) and chroma of the water; performing secondary precipitation to ensure that the free SS is precipitated and the wastewater is decolored further; separating to remove and degrade the chloride ions of the reuse water; performing secondary biochemical treatment to further reduce the concentrations of the SS, CODcr and BOD in wastewater; performing ozone oxidation treatment, decoloring, degrading organic matters; performing chemical treatment to remove insoluble dye materials and SS and reduce the COD and chroma; and performing secondary filtration, and forming an ozone / activated carbon system to ensure that the hydroxyl radicals of activated carbon are used and the organic reaction in wastewater is adopted to decolor and degrade organic matters. The invention overcomes the defects of the existing physical method, chemical method and chemical method treatment technologies; and the technology has been used in many enterprises, and the good treatment effects are obtained.

The invention relates to a rapid efficient ammonia nitrogen remover and a preparation method and application thereof. The rapid efficient ammonia nitrogen remover is prepared from the following components in percentage by mass: 5-35% of an oxidant, 5-50% of an inorganic coagulant, 2-40% of an adsorption material, 1-15% of a calcium salt and 1-20% of an effervescent disintegrant. The rapid efficient ammonia nitrogen remover can be dissolved in water, and is free of a residue, free of secondary pollution, the operation is simple and convenient, the time required for purifying the water is short, ammonia nitrogen can be quickly and efficiently removed, and the rapid efficient ammonia nitrogen remover has a certain removal effect on COD, total phosphorus and suspended matters at the same time. The rapid efficient ammonia nitrogen remover integrates oxidation, breakpoint chlorination, coagulating sedimentation, adsorption, pH value control and rapid collapse body dissolution, and the ammonia nitrogen can be quickly and efficiently removed.

A system and method for controlling flow in filtering systems and for balancing the flow through fluid systems employs flow control devices that minimize suspended matter precipitation. Several embodiments are included. In a first embodiment, a smooth-walled flow control device (410) with no abrupt transitions is provided in a flow conduit section. In a second embodiment, a filter (305) acts as a flow control device. A variation of the latter locates a flow control device (300) immediately adjacent to the filter (305) and upstream of it. In other embodiments, a control system (950) detects the real time status of the load to provide on the fly critical balancing.

A membrane separation method for reclaiming the electroplating sewage includes liqui material treating, lifting, pressurizing and delivering. It features the 3-class membrane separation to remove impurities, organic substances, fine suspended substances, Na ions, heavy metal ions, inorganic ions, etc. the regulation of pH value to prevent deposition of hydroxide, periodical automatic flushing and reuse of treated water.

The invention discloses a method for treating mercury-containing wastewater during PVC (Polyvinyle Chloride) production through a two-step process. The method comprises the following steps of: firstly, completing primary removal of mercury, copper, ferrous and ferric iron, cadmium, zinc, manganese, lead and suspending impurities of above 10mg / l by using a precipitator and a flocculating agent, regulating PH to 6-8 and then adding the flocculating agent and stirring for 30 minutes, standing for above 1 hour, discharging slag and aerating, absorbing mercury carried away by a gas phase through a sulfide adsorber, purifying water by using a plate type kieselguhr filter, removing residual suspended matters; and 2, carrying out complete reaction on the mercury in the wastewater by using an active carbon and a mercaptan and thiourea resin combining method again for being removed, and finally reaching the standard that the content of the mercury is less than 0.005mg / l. The treated wastewater can be recycled to salt melting or an acetylene generator, so that zero emission of the treated wastewater is achieved; and the mercury-containing waste acid water of hydrochloric acid desorption in the industry of chlor-alkali can be treated, the consumption of acid is reduced, and the great popularization significance is achieved in the industry of chlor-alkali.

The invention relates to a treatment method of waste water containing organic phosphorus, comprising the following steps: leading process waste water containing organic phosphorus to pass through a sand filtration tank for removing suspended matter and then adjusting the pH value thereof to 3-4; leading the process waste water to pass through a high-efficient catalytic oxidation apparatus, adding hydrogen peroxide for conducting oxidative degradation of the process waste water; then introducing the process waste water to a catalytic micro-electrolysis device, adding scrap iron and activated carbon and stirring, conducting electrochemical reaction, blasting air into the lower part of the catalytic micro-electrolysis device, and removing hard-degradable organic matter in the process waste water; and introducing the effluent of the catalytic micro-electrolysis device into an oxidation kettle, adding hydrogen peroxide for conducting multistage oxidation treatment, later adding lime, adjusting the pH value of the process waste water to 8-9, then adding flocculant for conducting precipitation, and forming ironic phosphate and calcium phosphate precipitate, thus removing phosphorus in the waste water. Compared with the prior art, the treatment method transforms the organic phosphorus into inorganic phosphorus for removal and has high removal rate of total phosphorus and low running cost, and the formed phosphate can be recycled and reused.

The invention discloses a system and method for treating domestic sewage in a rural area, which belongs to the technical field of environment-friendly sewage treatment. The domestic sewage enters an aerated grit chamber also serving as an adjusting tank for carrying out appropriate grit setting and adjusting, so that a part of inorganic pollutants is removed; the sewage is conveyed to a concentration type two-stage anaerobic reaction tank through a lifting water pump, suspended matters in the sewage are filtered and intercepted when the sewage passes through a concentration filter layer; contaminated gases, such as CH4, H2S and the like generated in the concentration type two-stage anaerobic reaction tank are discharged through a gas port; a part of concentration liquid is discharged out of the system through a concentration bottom sediment drainage pipe by opening a valve regularly; supernatant fluid from a water outlet of the concentration type two-stage anaerobic reaction tank enters a ladder plunge type wetland, a non-medium wetland, an economic income type wetland, a bacteria filter and a fishpond in turn; and nitrogen and phosphorus eutrophic pollutants in water are filtered, intercepted, adsorbed, decomposed, absorbed and precipitated by rootstocks of aquatic plants and the like. Therefore, according to the novel technology disclosed by the invention, the purpose of water purification can be achieved through regular harvest.

This invention relates to a photoelectromagnetic integrated advanced oxidation method and its device for waste water, which first of all acidizes the waste water, then strongly magnetizes it to generate energy of physical change and chemical change then enters into a photo-catalyzing box to be oxidated mostly to CO2 and water under the actioin of photo-catalyst, ultraviolet light, ozone and oxydol, in which, molecular chains of some hard-degradated substances are broken, then the waste water is micro-electrolysed to adsorb and recover the hard degraded substances under the action of extra low voltage, weak current and air, ozone and oxydol to get rid of COD, color degree, deodorizatin and disinfectant finall to filter it by diatomite and filter out suspending substances to reach the standard or recover it.

The invention relates to the field of environmental wastewater treatment, specifically to a nitrogen-phosphorus wastewater treating method by a sequencing batch reactor coupled photobioreactor. The method provided by the invention is characterized in that it comprises the following steps of: removing impurities and sediments of high concentration nitrogen-phosphorus wastewater and then treating the wastewater by using active sludge in the sequencing batch reactor, decanting a supernatant from the sequencing batch reactor, adding the supernatant into a membrane bioreactor for further aerobic treatment, filtering by ultrafiltration membrane in the membrane bioreactor to remove micro-suspension and bacteria, adding a generated ultrafiltration supernatant into a photobioreactor, disinfecting by ozone and adding algae filament as well as a few necessary nutrient salt, filling with carbon dioxide waste gas to perform microalgae cultivation, discharging a algae liquid after a microalgae growth cycle and adding the algae liquid into a flocculating settling pool for sedimentation, standardly discharging or reusing a supernatant liquor, compressing the concentrate algae liquid at the bottominto a microalgae cake by a plate and frame filter press. The invention has advantages of wide range of treated nitrogen-phosphorus wastewater water quality variation and production of economical microalgae with the utilization of nitrogen and phosphorus nutrients in wastewater as more as possible.

The invention discloses a method for cooperatively promoting agglomeration growth of PM (particulate matter) 2.5 and treating desulfuration wastewater in an evaporation manner and a device of the method. The method particularly includes steps that agglomeration liquor prepared by desulfuration wastewater, high polymer adhesive and wetting agent is sprayed into an inlet flue of an electric precipitator and is evaporated by the aid of heat of flue gas, in an evaporation process, the wetting agent promotes dust to enter drops of the agglomeration liquor, the high polymer adhesive is connected with PM2.5 via a polymer chain with polar groups, the grain diameter of the PM2.5 is prompted to be enlarged, so that the PM2.5 can be gathered by the follow-up electric precipitator, the desulfuration wastewater is evaporated completely, suspended matters and dissolvable pollutants in the wastewater are converted into solid to be dissolved out, and the suspended matters and the dissolvable pollutants in the wastewater, together with dust in the flue gas, are gathered by the electric precipitator. The device consists of a boiler, an air preheater, the electric precipitator, a desulfurizing tower, a hydraulic cyclone, a desulfuration wastewater clarification tank and an agglomeration liquor preparation tank, and a double-fluid atomizing nozzle is arranged in the flue between the air preheater and the electric precipitator.

The invention discloses a seawater factory-style circulating water fish farming treatment method which comprises, removing the residual bait and excrement from the seawater flowing out of the fish pond through full-automatic conduit pipe filter apparatus, entering foam separate tank from the circulating pump to remove part of the suspended matter and protein, then removing ammonia nitrogen through biological cleaning tank, adjusting water temperature and pH, disinfecting through ultraviolet rays, oxygenation, charging the detected water into the fish pond again, thus completing a circulation.

The technological process of treating papermaking effluent for reuse based on membrane integrating technique has membrane bioreactor, continuous membrane filter and reverse osmosis unit integrated for high efficiency treatment of papermaking effluent. The papermaking effluent treating process includes drum filtering and flocculating deposition to eliminate most suspended matter and colloid matter, anaerobic and aerobic biochemical treatment, filtering in membrane separating element, continuous membrane filtering, and treating with reverse osmosis membrane to reach the papermaking water standard. The present invention is especially suitable for treating hard-to-treat papermaking effluent.

The invention relates to a farmland runoff pollution ecological intercepting ditch. The cross section of the ditch is trapezoid; the two walls and the bottom of the ditch are hardened by a concrete plate on which a plurality of rectangular holes are formed, and plants which have high capacity of absorbing nitrogen and phosphorus are planted in the holes; a plurality of check gates are arranged in the ditch; and the bottom of the ditch is provided with a plurality of filter boxes arranged in an S shape, holes are distributed on the four walls of each filter box all over, an adsorbing material which has high capacity of adsorbing the nitrogen and the phosphorus is filled in each filter box, and the plants which have high capacity of absorbing the nitrogen and the phosphorus are planted in the filter boxes. By the farmland runoff pollution ecological intercepting ditch, the nitrogen and the phosphorus in farmland drainage can be effectively intercepted, and the intercepting rate is over 50 percent and over 60 percent respectively; suspended matters in the farmland drainage can be effectively intercepted, and the intercepting rate is over 95 percent; the conventional farmland drainage ditch can be fully utilized, and the problem that ecological engineering occupies more cultivated land is solved; and engineering cost and maintenance cost are low, and the ditch is easy to operate and maintain and convenient to popularize and apply in a large area.

The invention relates to an integral treatment process of the oily sewage of an oil field. The process flow in the invention is as follows: settling sand, removing oil, breaking emulsion through air flotation, treating with a microwave-enhanced Fenton system, performing flocculation and air flotation, performing precision filtering, performing catalytic ozonation with an activated carbon fiber felt, and performing ultrafiltration to obtain clean water. By adopting the integral treatment process, the operations of oil removal, emulsion breaking, advanced oxidation, flocculation, catalytic ozonation and membrane separation can be continuously realized. The floor space of equipment in the invention is small; the treatment process is suitable for various oily sewage and has obvious treatment effect; the removal rate of the chemical oxygen demand (COD) of raw water is more than 96%, and the oil content and the removal rate of suspended matters are 100%; and the turbidity of the obtained water is 4-6 NTU. The main indexes of the process provided by the invention such as the COD, oil content, suspended matters, turbidity and the like are better than those of the current oily sewage treatment process in oily sewage treatment; and the quality of the treated water can meet the related rules of the Integrated Wastewater Discharge Standard (GB8978-1996) and the Environmental Quality Standards for Surface Water (GB3838-2002).

This invention discloses apparatus and process for treating oil-containing wastewater. The apparatus is composed of an electric flocculation tank, an electric floatation tank, an ozone- and ultrasonic-enhanced oxidation device, and a reaction tank. Electric flocculation and electric floatation are adopted to remove oil and suspended substances. Ozone- and ultrasonic-enhanced oxidation is adopted to remove COD by degrading organic matters. The process has such advantages as stable operation, no need for chemical reagents, small floor area, and high automation. Treated oil-containing wastewater is qualified for discharge.

This invention relates to a combined vertical flow-vertical deflection wet land treatment technique for domestic wastewater. The technique comprises a pretreatment system and an artificial wet land system. The pretreatment system is mainly aim to removing the floating matters and precipitable suspended matters in domestic wastewater. The artificial wet land system is composed of combined vertical flow-vertical deflection in series. The invention has high removing rate on COD, N and P in domestic wastewater.

The invention relates to a recycling processing method for a stainless steel processing process wastewater grading precipitation, which comprises the following steps: (1) deslagging and homogenizing acid-washing residual liquid and washing wastewater; (2) adjusting the pH to 4.0-5.5 by a CaCO3 filter bed to generate CaF2; (3) oxidizing Fe<2+> into Fe<3+> by an oxidizing agent to generate sedimentsof Fe(OH)2 and Fe(OH)3; after the Fe(OH)2 , the Fe(OH)3 and the CaF2 are deposited, recovering; (4) carrying out three-level alkali adding coagulation precipitation on the supernatant liquid of an oxidation precipitation pool; adjusting the pH to obtain a Cr sediment in the first-level alkali adding coagulation precipitation; acquiring a Ni sediment in the second-level alkali adding coagulation precipitation; carrying out the third-level alkali adding coagulation precipitation and adding a flocculating agent to remove residual heavy metal ions so that discharge water reaches the standard, wherein the alkali added into a grading reaction precipitation pool is NaOH, Ca(OH)2, CaO or Na2 CO3; (5) regulating the pH of the discharge water of the grading reaction precipitation pool to 6.0-8.0; discharging 0-20 percent of wastewater and filtering residual F<-> and suspended matters of 80-100 percent of wastewater to reach the standard and recycle; and (6) recycling the Cr-Ni metal or the compound thereof from the Cr sediment and the Ni sediment acquired by a third-level coagulation precipitation pool by a recycling device.

The invention discloses a treatment technique for oil sewage in produced liquid in 3-dimension complex drive in oil fields. The produced liquid in 3-dimension complex drive in oil fields contains a mass of polymers, alkali and surfactant, thus water-in-oil emulsion formed in the sewage is quite stable and treatment of the oil and suspended substances is quite difficult. The technique uses methods of natural sedimentation, oil removal by floatation, coagulation sedimentation and mechanical filtration by adding oil removal agent, flocculant and coagulant aid to treat the oil sewage in the produced liquid in 3-dimension complex drive, so as to realize that oil content in the water after the treatment of the sewage is less than 20 mg / L and the content of the suspended substances is less than 20 mg / L to meet the standards of injection water of the 3-dimension complex drive in the oil fields. The technique solves the problems of the oil sewage treatment in the produced liquid in 3-dimension complex drive in the oil fields and has effective economic and social benefits for saving water resource, reducing tertiary recovery cost and protecting the environment.

The present invention discloses process of treating oil-bearing sewage for ternary combination flooding in oil field. The process includes the following steps: 1. gravitational settling of the sewage; 2. combined cyclonic and air floating treatment for oil-water separation; 3. regulating pH value of sewage and adding inorganic flocculant and organic flocculant; 4. further settling; and 5. filtering in a double filter material filter and a modified fiber ball filter. The process can treat sewage to reach the requirement for using as recirculated polymer flooding water with oil content not more than 30 mg / 1, suspended matter content not more than 30 mg / 1 and granularity midvalue not greater than 5 micron.

Provided is a wastewater treatment apparatus including a bottom portion and a plate formed above and spaced apart from the bottom portion to form a lower chamber with the bottom portion, an outlet installed on the bottom portion for drawing off water and sludge in the lower chamber before backwashing, a filter medium layer supported to the upper portion of the plate by the plate, the upper layer of which forms a bottom portion of an upper chamber, a wastewater introducing means connected to the lower chamber, for introducing wastewater to be treated into the lower chamber, a process air introducing means for supplying process air to the filter medium layer formed over the plate, a plurality of aerators formed over and spaced apart a predetermined distance from the plate, and mounted in a plurality of air flow pipes led to the process air introducing means, a backwash air introducing means for supplying backwash air to the lower chamber during backwashing, a backwash water introducing means for supplying backwash water to the lower chamber during backwashing, a plurality of nozzles extending from the lower chamber to the filter medium layer through the plate, a treated water discharging means for discharging the treated water having passed through the filter medium layer, and a returned water introducing means for returning the treated water having passed through the filter medium layer to the lower chamber. By means of batch style wastewater treatment apparatus utilizing biological filtering process, the organic matter, suspended solid matter, nitrogen and phosphorus can be efficiently removed.

The invention provides a metal surface vitrification agent and an application method thereof, aiming for solving the problem of possibility of environmental pollution caused by waste water discharge in a treatment process or after treatment in the existing metal surface phosphating treatment technology. According to the invention, the metal surface vitrification agent comprises 2.0-38.0% of zirconium titanium salt, 0.1-8.0% of silane, 0.5-18.0% of a buffer agent, 0.01-5.00% of film forming assistant, 0.1-6.1% of an anti-rust agent and 0.2-7.0% of a complexing agent, wherein the surface appearance is clear transparent liquid and no suspended matter exists; pH value is 1-2, and the specific gravity is 1.05+ / -0.02 g / cm<3>. The metal surface vitrification agent has the advantages that an embedded hybrid indissolvable nanometer ceramic conversion coating is formed on the metal surface at normal temperature and is excellent in impact resistance, the adhesion force of the coating is improved, and the corrosion resistance of the metal surface is enhanced. In addition, the metal surface vitrification agent, provided by the invention, contains no component capable of causing environmental pollution, and can be directly discharged without environmental pollution.

The invention discloses a recycling harmless treatment method of stainless steel pickling waste water, belonging to the toxic and harmful industrial waste water treatment field. The method comprises the following steps of: 1) recycling inorganic acids by an acid separation method: pumping stainless steel pickling waste water in which suspended matters are removed through filtering into a resin column so that the inorganic acids are absorbed on the resin; 2) removing impurities by a goethite method: pumping heavy metal ion solution into a reaction kettle, adjusting pH to a range from 3.5 to 5.0, and continuing reacting for 30-90 min, thereby removing iron, chromium and fluorine in the heavy metal ion solution in the form of dregs; 3) recycling nickel by a neutralized sedimentation method: feeding an alkaline liquor to nickel solution to adjust pH to a range from 9.5 to 12.5, and filtering and washing the filter residues, thereby obtaining nickelous hydroxide; and 4) performing harmlesstreatment on the dregs: after washing the dregs, adding lime powder to the dregs to realize stabilization treatment of harmful elements. The method is simple in operation and convenient for management; the high-concentration inorganic acids and nickel and the like contained in the waste water are all recycled, and simultaneously the generated dregs are harmlessly treated; and therefore the integration of economic benefit,environmental benefit and social benefit is realized.

The invention discloses an underwater target three-dimensional reconstruction method based on line structured light. The method includes the following steps that a, an underwater two-dimensional image including depth information is acquired; b, enhancement processing is conducted on the underwater two-dimensional image; c, noise reduction processing is conducted on the two-dimensional image acquired in the step b; d, image edge detecting and image shape processing are carried out on the two-dimensional image acquired in the step c, and the center of each laser streak is extracted; e, the two-dimensional image acquired in the step d is calibrated; f, three-dimensional coordinates are acquired from the two-dimensional image acquired in the step e; g, the three-dimensional coordinates are reconstructed through computer high-level programming languages, namely visual underwater target three-dimensional information is obtained. By means of the underwater target three-dimensional reconstruction method based on line structured light, the influence on detecting precision because of suspended matter in water, light absorbing and scattering by seawater, uneven light fields and the like can be effectively lowered, wide-angle and long-distance underwater target three-dimensional information extraction is achieved, and underwater long-distance high-precision real-time target three-dimensional detection is realized.

The invention relates to a chemical industry park's wastewater bio-treatment apparatus and a method thereof. The apparatus contains an equalizing tank, a primary settling tank, an improved ABR apparatus, a first-stage anoxic pool, a first-stage powdered active carbon aeration tank, a secondary-stage anoxic pool, a secondary-stage aeration tank, a secondary sedimentation tank, an ozone oxidation pool, a coagulation pool, a rotary disk filter, a chlorine dioxide disinfection pool and a sludge thickener. An UASB reactor is adopted in a first-grid reaction zone of the improved ABR apparatus so as to increase the first-grid sludge concentration and raise shock load resistance of an anaerobic reactor and biodegradability of wastewater. According to the two-stage A / O treatment technology, powdered active carbon is added into the first-stage aeration tank to enrich microorganisms and simultaneously absorb part of poisonous and harmful substances, thus mitigating or eliminating the inhibition effect of the poisonous and harmful substances on microorganisms in subsequent units; and the second-stage A / O system operates to further remove nitrogen and organic matters. An effluent in the secondary sedimentation tank undergoes depth treatments such as ozone oxidation, coagulation-filtration, disinfection and the like so as to further remove organic matters and suspended matters. The effluent is reused according to requirements.

The invention provides a high efficiency sewage treatment method which comprises pre-processing, biological chemical treatment, deposition processing, deposition trash concentration disposal, and thick sludge dehydration treatment. By employing the biological method with anoxybiotic, anaerobic as the main steps and aerobic as the auxiliary step, the NH3-N, T-N and T-P in the sewage can be removed effectively, and the binding precipitant has very strong physical adsorption property.

The invention discloses a technique of biological treatment for coking wastewater. The filter chamber is composed of a preprocessing part, a biological treatment part and a physical treatment part, wherein the biological treatment part is composed of an anaerobic ceramsite filter chamber, an anoxia ceramsite filter chamber and an aerobic ceramsite filter chamber which are connected in series, spherical ceramsite filtering materials or irregular-shape ceramsite filtering materials are all filled in the anaerobic ceramsite filter chamber, the anoxia ceramsite filter chamber and the aerobic ceramsite filter chamber as biofilm culturing filling and filtrating precoats, the anaerobic ceramsite filter chamber employs an internal reflux mode, a reversed flow mode is employed between the anoxia ceramsite filter chamber and the aerobic ceramsite filter chamber, the precoats in the filter chambers are respectively formed by ceramsite filtering materials with different thickness, the filter chambers employs backwash to exclude accumulated sludge and suspended substance in the filter chambers into flotation tanks of the preprocessing part, the anaerobic ceramsite filter chamber, an anoxia ceramsite filter chamber employs regular water scrubbing to drive macro-gas-bubble in the chambers. Compared with the prior art, the technique has the advantages of prolonging sluicing periodic time, stabilizing operational effect, improving treatment loading, thereby reducing retention time of waterpower, decreasing accommodation area and investment of pile plant.

The invention relates to a method for coagulating coal-bed gas produced water, which is realized in a way that: coal-bed gas produced water is coagulated by combining a chemical compounded from an inorganic coagulant and an organic flocculant with a coagulation assistant, or combining an inorganic coagulant, an organic flocculant and a coagulation assistant; a pretreatment pool is arranged at the outlet of the coal-bed gas produced water, a coagulation assistant dissolving box is arranged at the water inlet of the pretreatment pool, and the amount of the coagulation assistant is controlled by using a measuring pump or flowmeter; and the coal-bed gas produced water is firstly conditioned by the coagulation assistant, and then treated by the chemical compounded from the inorganic coagulant and the organic flocculant, or treated by combining the inorganic coagulant and organic flocculant. The amounts of the compounded or combined inorganic coagulant and organic flocculant are controlled by using the measuring pump or flowmeter, thereby effectively removing suspended matters in the coal-bed gas produced water, being beneficial to removing oil, multiple soluble ions, other organic substances and the like, reducing the consumption of chemicals and relieving the treatment load of the subsequent technique, so that the treated produced water can be discharged under the standard or can be conveniently recycled.

The invention relates to the technical field of sewage treatment and particularly relates to an A3 / O-MBBR (Moving Bed Biofilm Reactor) integrated sewage treatment device and an A3 / O-MBBR integrated sewage treatment method. According to the device provided by the invention, a sewage backflow mechanism, a nitrification liquor backflow mechanism and an anaerobic liquor backflow mechanism are arranged and suspended filler is filled in an aerobic tank, so that the integrated sewage treatment device has a good effect for treating nitrogen and phosphorus in sewage and is high in treatment efficiency, compact in structure and small in occupied area. In addition, by virtue of optimizing a settling pond structure in the integrated sewage treatment device, the settling effect of the settling pond is improved, and the sludge floatation phenomenon and the content of suspended solids in effluent can be remarkably reduced. After sewage is treated by the integrated sewage treatment device provided by the invention, the effluent can reach the level A of first class stand of pollution discharge standard for municipal sewage treatment plant (GB18918-2002).

The present invention relates to an extraction method of stevioside. The invention comprises the following procedures: extracts of stevioside eliminates colloid, pigment, solid suspended substance and fiber through pretreatment and then is made into finished products through processes of first-phase membrane filtration, resin absorption, analytic, desalination, decoloration, second-phase membrane filtration, and spray drying, wherein the penetrant of the first-phase membrane filtration is recycled as the diffusion water, and the penetrant of the second-phase membrane filtration is recycled as desorption solution, while the waste liquid of the resin absorption is discharged or recycled after treatment. The product of the present invention has a high purity, which is greater than 90 percent and superior over the national standard high grade product; the present invention can solve the problems of lower purity product and large amount of wastewater of routine method efficiently, and prolongs the service life of the resin by three times.

The invention discloses an observation system and determining method for the resuspension quantity of deep-sea internal waves to seafloor sediments. The observation system includes a seafloor observation platform, a cable and an anchoring tethered weight. The seafloor observation platform is equipped with an acoustic releaser, a single-point ocean current meter, a turbidimeter, a high-precision conductivity-temperature-depth instrument and a sediment capture device, and the cable is equipped with a main floating body and a sub floating body; a part, located at the middle of the cable, of the main floating body is equipped with an acoustic doppler current profiler; the sub floating body is provided with the turbidimeter and the high-precision conductivity-temperature-depth instrument; the anchoring tethered weight is a gravity anchor with a square-shaped clamping groove and a fixed ring. The determination method includes the steps: calibrating the instruments indoor, placing and recovering the observation system by an auxiliary ship, reading the data of the observation instrument and analyzing the composition of captured suspended matters, and determining the resuspension quantity of the internal waves to the sediments. The observation system can be placed on the deep sea bottom safely and steadily, and can observe the full-water-depth marine dynamic environment parameters fromthe seafloor to the sea surface, and determines the resuspension quantity of the internal waves to the sediments.