404results about How to "Good processing effect" patented technology

A processing method for silane coupling agent modified carbon fiber surface comprises the following steps: removing the sizing agent coated on the sizing carbon fiber surface by using acetone, drying, then carrying out oxidation etching on the fiber surface by using concentrated nitric acid, water-washing until the pH reaches 6 to 8, drying, then dispersing the fiber into tetrahydrofuran, adding lithium aluminium hydride to reduce the oxygen containing groups on the fiber surface and convert all the oxygen containing groups into hydroxyl groups, then adding hydrochloric acid, stirring for 1 to 2 hours, filtering so as to obtain carbon fibers, soaking and washing the carbon fibers with tetrahydrofuran, drying, then dispersing the carbon fiber into a silane coupling agent hydrolysate, stirring or subjecting the carbon fiber to an ultrasonic treatment, filtering so as to obtain the carbon fiber, and drying the carbon fiber. The method improves the surface activity of the carbon fiber, does not harm the fiber body, and is capable of being applied to mass production.

The invention discloses a deep treatment method for cyanide-containing waste water of a tailings pond in the gold industry. The process adopts an ozone oxidation method, a catalytic oxidation method and a biological treatment method to collectively deeply treat the cyanide-containing waste water of the tailings pond in the gold industry. Through the combination of the three methods, a good treatment effect on the cyanide, thiocyanate, arsenic and heavy metals is good, the content of the cyanide after being treated is less than or equal to 0.05mg/L, the content of ammonia and nitrogen after being treated is less than 1mg/L, and other pollutants after being treated can meet the requirement of the ground surface water grade-B water quality standard. The method is used for treating the cyanide-containing waste water of the tailings pond in the gold industry, the treatment effect on the cyanide, the COD, As and heavy metals is good, the heavy metals such as the gold and silver as well as other metal resource can be recovered, and the secondary pollution caused by the ammonia and nitrogen can be avoided. By adopting the deep treatment method for the cyanide-containing waste water of the tailings pond, a good environment, a good economic benefit and a good social benefit can be achieved.

The invention relates to a method for treating coking waste water by an electro-Fenton-coagulation combination process, which comprises the following steps of: 1) introducing biochemical effluent of the coking waste water into a regulation pond, regulating water quality and water volume, and regulating the pH value to be between 2 and 4; 2) introducing the effluent in the regulation pond into an electrochemical reactor, adding H2O2, and regulating current density to be between 50 and 300 A/m<2>; 3) introducing the effluent in the electrochemical reactor into a coagulation sedimentation pond, regulating the pH value to be between 7 and 8 by using alkaline liquor, adding a flocculating agent, performing a flocculating reaction, and performing mud water separation in the sedimentation pond; and 4) filtering the effluent in the sedimentation pond by a sand leach unit, and discharging. By the method, the biochemical effluent of the coking waste can be deeply treated, chemical oxygen demand(COD), ammonia nitrogen and chromaticity of the effluent can meet the requirements of national first-level discharge standards and the water inflow requirement of the advanced treatment of membrane separation.

The invention relates to a process for biologically treating wastewater with sulfate and hydrochloric acid and recycling elemental sulfur, belonging to the technical fields of environmental protection and wastewater treatment, which is characterized in that in the process, the sludge acidic fermentation products from a wastewater treatment plant is used as carbon source sulfate reducing bacteria for treating acidic sulfate wastewater and recycling the elemental sulfur; the sulfate reducing bacteria SRB in an anaerobic biological reactor reduces sulfate SO4<2-> creature as hydrogen sulfide H2S of colorless sulfur bacteria CSB in an aerobic biofilm reactor reduces H2S or S<2->creature as the elemental sulfur and then the obtained substance is filtered and sand-scrapped by a slow sand filter; the elemental sulfur S in sand filtering material is completely dissolved by an extraction equipment; the extractant CS2, the sand filtering material and the biofilm are separated by a solid-liquid separator; the extracted solution is distilled by a distillation equipment; the distilled solution is parched by a drying device and then the elemental sulfur is recycled.In the invention the mine wastewater with the sulfate and the hydrochloric acid is treated; the elemental sulfur is recycled and the sludge from the wastewater treatment plant achieves resource utilization and harmlessness.

The invention discloses a method for automatically processing a video according to music beats. Music in a system is subjected to beat type labeling, and one or more than one processing effect matched with each beat type is preset for the beat type; then, a video to be processed is received, the required music is selected from the system, and each beat type of the selected music is extracted; according to each beat type, one matched processing effect is selected; and finally, the processing effect automatically acts on the video to be processed to obtain a result video. A user can add the music to the video only by selecting favorite music, and the video is processed into an effect conforming to the music beats. Learning costs are not needed, few time costs are spent by the user, and the processing effect is good.

The invention discloses a zero-sewage discharge novel process for development of natural gas fields. The zero-sewage discharge novel process comprises the following steps of: classifying sewage in a gas field into normal production sewage, domestic sewage, overhauling sewage, accident waste liquid, rainwater, production wastewater and gas field water, and collecting separately; next, guiding the normal production sewage, domestic sewage, overhauling sewage, accident waste liquid and initial rainwater to a biochemical treatment unit, guiding the production wastewater to an electrodialysis treatment unit and guiding the gas field water to a gas field water pretreatment unit; guiding all of up-to-standard sewage which is treated by the biochemical treatment unit previously and not completely recycled, concentrate generated after the treatment of the electrodialysis treatment unit and the gas field water treated by the gas field water pretreatment unit to an evaporative crystallization unit for advanced treatment; and after the quality of the water is up to the standard, recycling the water as make-up water for circulating cooling water or water for other production in the gas field, and separating out pollutants from the sewage in the form of crystalline salts, backfilling or recycling the crystalline salts, and finally, realizing zero discharge of the sewage.

The invention discloses a dyeing wastewater treating agent and a manufacturing method thereof. The dyeing wastewater treating agent is prepared from the following raw materials in parts by mass: 70-100 parts of diatomite, 40-70 parts of attapulgite, 90-120 parts of modified starch, 15-40 parts of acrylamide, 2-10 parts of ferrous sulfate, 20-30 parts of magnesium sulfate, 10-25 parts of meerschaum powder, 10-20 parts of crosslinked rectorite, 0.5-2 parts of polyacrylamide, 20-30 parts of cationic monomer, 0.17-0.21 part of initiator and 0.09-0.1 part of crosslinking agent. The treating agent can perform the flocculating settling purification and disinfection functions on the dyeing wastewater, has the characteristics of wide raw material sources, lower cost and favorable treatment effect, and is convenient for popularization and application.

The invention provides a processing method for a back cover, the back cover and electronic equipment. The processing method comprises the steps of forging and pressing a metal sheet to prepare a semifinished product of the back cover, wherein an accommodating space is formed in the inner surface of the semifinished product of the back cover while an appearance plane is formed on the outer surface; the metal sheet is prepared by extrusion of an initial metal blank; performing aging treatment on the semifinished product of the back cover; and processing structural characteristics and appearance characteristics on the semifinished product of the back cover after the aging treatment is carried out so as to form the back cover. By adoption of the scheme, the raw materials can be reduced, the CNC (computer numerical control) processing time can be greatly shortened, and the cost can be lowered.

The invention relates to paracoccus sp. and a culture application thereof. The strain is paracoccus sp. FSTB-2, collected at 'China General Microbiological Culture Collection Center' on June 1, 2015, and the preservation number is CGMCC No. 10938. The strain can be applied to efficiently removing COD (chemical oxygen demand) in salty wastewater with salt content of 1.0wt%-8.0wt%, and can grow at the high temperature of 40 DEG C. The invention further provides COD removing salt-tolerant bacteria which comprise the paracoccus sp. FSTB-2. The COD in the high-salt wastewater can be rapidly degraded by the paracoccus sp., the paracoccus sp. is high in salt resistance and good in treatment effect, combining strains are omitted, and the production cost of the salt-tolerant bacteria is greatly reduced.

The present invention is one kind of composite sludge curing material for curing sludge produced in water engineering and civil engineering. It is cement-based curing material with certain amount offlyash as industrial waste and gypsum added. Through mixing with sludge, it is possible to improve the property of sludge, which has hydroxide water content and low strength, and reusing waste sludge with likely environmental pollution as engineering material. The utilization of industrial waste results in low cost.

The invention discloses a combined type sewage treatment apparatus, which comprises an integrated grid-shaped sewage filter component formed through assembled connection of a plurality of sewage treatment primitive boards. The outer contour of the filter component is adapted to the shape and the size of a cross-section of flowing water of the sewage so as to determine the shapes and the number ofthe selected sewage treatment primitive boards. Each sewage treatment primitive board comprises a cage for filling with a water treatment adsorbent, wherein a unit frame and two cover plates with meshes are actively assembled into the cage. With the meshes in the cover plate, the water treatment adsorbent in the cage can be prevented from loss. The shapes and the number of the sewage treatment primitive boards can be adjusted freely, such that the size of the sewage treatment apparatus can be adapted to a sewage treatment system requiring treatment. The sewage treatment primitive boards are easy to be disassembled and assembled, such that the water treatment adsorbent can be reused so as to reduce the secondary pollution. The apparatus provided by the present invention has characteristicsof simple structure, convenient operation, low cost, strong applicability and good size adjustability, and can be applicable for various sewage treatment systems.

A water treatment agent is made by adding blended powder of tourmaline and magnetic chitosan microsphere into sodium alginate and polyvinyl alcohol for resolving and uniform mixing and then curing. The magnetic chitosan microsphere is made by taking superparamagnetic ferroferric oxide, 1 to 10wt percent of chitosan acetic acid solution, liquid paraffin, Span-80 and glutaraldehyde solution as reaction mass and adopting an emulsion crosslinking method, the mass ratio of the superparamagnetic ferroferric oxide and chitosan acetic acid solution is 1 to 1-10, the volume ratio of liquid paraffin and Span-80 is 10-100 to 1, the volume ratio of chitosan acetic acid solution of superparamagnetic ferroferric oxide and paraffin and Span 80 is 1 to 1-10, and the volume ratio of the mixed liquor of the chitosan acetic acid solution and the paraffin, and the glutaraldehyde solution is 5-50 to 1. The water treatment agent disclosed by the invention ensures that removal ratio of volatile phenol in water can reach 80 to 90 percent and the removal ratio of chromium in water can reach 93 percent, and meanwhile has the advantages of high adsorption capacity, high purification efficiency, low cost, renewability, innocuity, zero contamination to environment, and the like.

The invention relates to a domestic sewage treatment device, which is suitable to treat rural domestic sewage and decentralized domestic sewage, outside urban sewage pipe network, from units, office buildings, residential areas, dwelling buildings, hotels, public toilets and other places. The domestic sewage treatment device of the invention comprises a grit chamber, an anaerobic digester and an ecological purification filter chamber which are connected in turn, wherein a grit area, a trapping are arranged in the grit chamber and a flow guide area and an anaerobic filter area are arranged in the anaerobic digester and multiple vertically baffling sedimentation and filtration area with an aerobic area; and therefore, the effluent of the sewage treated by the domestic sewage treatment device can meet the requirements of Domestic Sewage Comprehensive Discharge Standards GB8978-1996 for first-grade effluent. All structures are buried underground, power is not required, the floor area occupation is small, the management is simple and convenient, operation cost is avoided basically, the surrounding landscape is not influenced, and the environment is beautified.

The invention provides a machining method of a long-and-thin walled cylindrical component, and belongs to the technical field of machining of cylindrical components. The method comprises the following steps: carrying out rough machining to obtain a rough machining workpiece with a chuck; carrying out quenching and tempering treatment on the workpiece subjected to rough machining; carrying out ultrasonic flaw detection on the workpiece; carrying out rough turning and half finished turning of the workpiece; carrying out stress elimination treatment on the workpiece; caryring out finished turning of the workpiece; placing a circular disc shaped support part in an inner hole of a chuck end; clamping the chuck; carrying out finished turning of an outer circle and the inner hole; radially cutting a groove on the outer circle of the workpiece close to the chuck part; then carrying out finished turning of the inner hole and the end surface of the other end to a designed size; finally, cutting off the end provided with the chuck; milling and cutting off the end surface of the workpiece of the chuck end to the length of the workpiece to meet the design requirement. According to the machining method of the long-and-thin walled cylindrical component, the deformation of the workpiece during clamping can be avoided, the machining stress of the workpiece can be effectively released, and the situation that coaxial degree of the workpiece meets the design requirement can be guaranteed.

The invention provides a wastewater treatment agent. The wastewater treatment agent comprises silicon iron copolymer and a Fenton's reagent, wherein when the total weight of the wastewater treatment agent is taken as reference, the content of silicon iron copolymer is 50-70 wt%, and the content of the Fenton's reagent is 30-50 wt%. The invention also provides a preparation method of the wastewater treatment agent and a wastewater treatment method adopting the wastewater treatment agent. The treatment effect of the wastewater treatment agent is better than that of a wastewater treatment agent in a control group, and particularly, the ammonia nitrogen treatment effect is remarkably optimized. The wastewater treatment method is simple, is short in treatment period and does not generate irritant gases.

The invention discloses a coking wastewater treatment system. The system comprises coking wastewater coal car treatment equipment, coking wastewater oxidization and biochemical treatment equipment, and coking wastewater deep treatment equipment, wherein the coking wastewater coal car treatment equipment is used for removing coal tar from the coking wastewater; and the coking wastewater deep treatment equipment is used for deeply treating the coking wastewater. The coking wastewater treatment system has good treatment effect. The invention further provides a coking wastewater treatment method.

The present invention discloses a multi-layer type water screen spray room, whose inside is provided with a water screen plate, and the inside of the spray room is divided into the front spray painting operating area and the back painting mist processing area. The bottom of the whole spray room is provided with a water tank, and an air flow channel is formed between the water tank and the water screen plate. The upper part of the painting mist processing area is provided with an air exit, and the upper part of the spray painting operating area is provided with a uniform compression chamber. The uniform compression chamber is connected with the central wind supplying system to make the dissipated paint mist in the whole spray painting operating area can be fully absorbed to the painting mist processing area for processing, moreover, the invention can reduce the energy consumption of the whole system and is convenient for the maintenance of the system. The inside of the painting mist processing area is provided with a glue flower layer, and a plurality of water spray nozzles, and the glue flower layer further absorbs the residual paint mist to ensure the processing effect of paint mist. The water screen plate comprises the upper and lower layer water screen plates, and the upper and lower water screen plates are all provided with water tanks. The invention makes the spray room provide different spray painting environments according to the spray coating requirement of the working piece by choosing to start the water screen plate.

The invention relates to a method for treating wastewater and equipment thereof. A method for treating acid wastewater generated during high phosphorus hematite ore dressing is characterized in comprising the following steps: 1)a step of preparation of modified red mud is prepared, which comprises the following sub-steps: (1) red mud is dried, crushed and passed through a 20-mesh sieve to obtain red mud powder; (2) according to a red mud powder to hydrochloric acid ratio of between 40 to 60g:1L, the red mud powder is added into the hydrochloric acid, fully stirred in a water bath pot at 60 to 100 DEG C for 1 to 2 hours and cooled to obtain a mixed solution, and (3) the mixed solution is added with ammonia water with stirring, subjected to adjustment pH value to between 7.5 and 8.5 and keeps stand; and the obtained precipitate is washed with distillate water, dried, crushed, passed through a 60-mesh sieve to obtain the modified red mud; and 2) according to a principle of 6 to 23 grams of modified red mud for per litter of acid wastewater generated during the high phosphorus hematite ore dressing, modified red mud is added into a coagulative precipitation tank containing acid wastewater generated during the high phosphorus hematite ore dressing and stirred for 1 to 2 hours to obtain mud-water mixed liquid; and the mud-water mixed liquid flows to a dynamic membrane reactor to obtain reusable acid purified water. The method has the characteristics of good treatment effect, simple process operation, high water flux, low cost, short treatment period, etc.

The invention relates to a treatment method of copper-containing industrial wastewater and in particular relates to a treatment method for removing metal ions from copper-containing wastewater by adopting a combined process. In order to overcome the technical defects that the content of copper ions is relatively high and the treatment of other metal ions does not meet the standard in a copper-containing industrial wastewater treatment process in the prior art, the invention provides a treatment method of copper-containing industrial wastewater. The treatment method comprises four reaction steps of iron carbon microelectrolysis, catalytic oxidation, alkalization precipitation and acid-base neutralization. After the treatment, the content of the copper ions is remarkably lower than the national emission standard, and the content of other toxic ions also can meet the national emission standard, so that the treatment method is suitable for popularization and application in the copper-containing wastewater treatment industry.

The invention relates to a titanium tetrachloride-poly dimethyl diallyl ammonium chloride inorganic-organic compound flocculant and a preparation method thereof. According to the compound flocculant, the content of Ti(titanium) is 6.80-6.98wt%, and the content of polydimethyl diallyl ammonium chloride is 1.74-4.25wt%. The preparation method of the compound flocculant comprises the following steps of: using titanium tetrachloride solution and polydimethyl diallyl ammonium chloride as raw materials; mixing the PDMDAAC (poly dimethyl diallyl ammonium chloride) according to the weight ratio of Ti(titanium) to the PDMDAAC equal to 4-10:1; and, at the normal temperature, blending and reacting to obtain the product. The flocculant combines the advantages of the PDMDAAC and the titanium tetrachloride, has good comprehensive property, and is widely applied to the fields such as the water supply industry, the wastewater treatment industry, the paper-making industry, the textile dyeing industry, and the daily chemical industry. When the adding amount of the flocculant is 10-30mg/L, the water treatment effect of flocculant is good.

The invention belongs to the technical field of treatment of drinking water and particularly relates to a method for pre-oxidizing and reinforcing coagulation of algae cells and controlling release of organic substances in algae cells. Aiming at the eutrophicated pollution of surface water such as pools, reservoirs and the like, the invention provides a method of orderly adding pre-oxidant and ferrite, ferric salt and the like. The pre-oxidant inactivates the algae cells while the ferrite cancels the pre-oxidization to control the continuous release of the organic substances in the algae cells, and the nascent trivalent iron generated by the oxidization of ferrite and ferric salt are used as a coagulant; and the coagulation of the pre-oxidized algae cells is reinforced. The method disclosed by the invention is mainly applied to purification for drinking water factories, and is also applied to treatment of the landscape water with the target of recycling the landscape water body, pre-treatment of the eutrophicated water body and inhibition of growth of algae cells.

The invention relates to a plant rehabilitation technology of cadmium-polycyclic aromatic hydrocarbon combined polluted soil, in particular to a heavy metal-polycyclic aromatic hydrocarbon combined polluted soil reinforcer and application thereof. The reinforcer comprises the following components in mol ratio of citric acid: salicylic acid of (0.5-5.0):(0.1-1.0). The reinforcer is put into the heavy metal-polycyclic aromatic hydrocarbon combined polluted soil planted with hyperaccumulator and/or accumulator. The citric acid and the salicylic acid are mixed and then dissolved in water to be used as the reinforcer and then applied to the heavy metal-polycyclic aromatic hydrocarbon combined polluted soil planted with the hyperaccumulator and/or accumulator, especially polluted soil planted with nightshade, and after the nightshade is ripen, the plant and the soil samples are harvested; by comparing the harvested plant and soil samples with the plant and soil samples without the putting of the reinforcer, the treatment effect of the plant and soil samples applied with the reinforcer is best, the Cd extraction rate of the overground part of the nightshade is increased by 39.8 percent; meanwhile, the removal rate of the total quantity of the polycyclic aromatic hydrocarbons in the soil can reach 30.2 percent and the repair efficiency is remarkably improved.

The invention relates to a denoising method and device based on noise estimation. The denoising method comprises a noise sample updating step, a denoising processing step and a judging step. In the noise sample updating step, a voice starting point of a signal to be processed is detected, M frames of signals before the voice starting point are updated into noise signals of a noise sample, and signals after the voice starting point are called voice signals with noise. In the denoising processing step, L frames of voice signals with noise to be processed are subjected to denoising processing according to the noise sample. In the judging step, whether the amplitudes of N frames of signals to be processed later are all smaller than a preset threshold is judged, the noise sample updating step is executed if the amplitudes are smaller than the preset threshold, and the denoising processing step is executed otherwise. By means of the denoising method and device based on noise estimation, unstable noise signals can be better tracked.

The invention discloses a method for treating cyanide-containing wastewater in gold cyaniding enterprises. The method comprises the four steps of electrochemical treatment, chemical oxidation treatment, coagulating sedimentation treatment and biological activated carbon treatment. When the cyanide-containing wastewater is treated, cyanide is electrolyzed by adopting the electrochemical treatment method; coagulating sedimentation is carried out by adding a coagulating agent, and heavy metal pollutants in wastewater can be removed; precipitated wastewater is oxidized by adding a chemical reagent; and finally, pollutants which are hardly removed from wastewater by a chemical method are removed by adopting a biological and physical adsorption method through a biological activated carbon treatment system. According to the method, the four steps are combined together according to the characteristics of complex and hardly treated pollutants in cyanide-containing wastewater of gold production enterprises, and are synergized to carry out deep treatment on the cyanide-containing wastewater of gold production enterprises. The method has the advantages of good treatment effect, high treatment efficiency, stable system operation and simple process flow, and can easily realize industrial application, and the treated wastewater can be returned to a production process flow to be used as reclaimed water or discharged with standard level.

The invention discloses a method for utilizing sludge containing vanadium and chromium. The method disclosed by the invention comprises the following steps of: drying the sludge containing vanadium and chromium, then adding an organic binding agent and silicon carbide powder, processing to form balls, and then baking again to obtain mud balls containing vanadium and chromium; and returning the mud balls containing vanadium and chromium to a steelmaking LF (Ladle Furnace) refining process, reducing Cr and V elements of Cr2O3 and V2O5 oxides in the mud balls containing vanadium and chromium by utilizing an LF, and then microallying the mud balls containing vanadium and chromium in molten steel. According to the method, the sludge containing vanadium and chromium is dried and made into balls, so that the treatment cost is low; and the Cr and V elements are reduced and converted into steelmaking alloying beneficial elements in a steelmaking internal refining process and are microalloyed in the molten steel. The method disclosed by the invention is taken as a harmless treatment manner of the sludge containing vanadium and chromium, the sludge treatment cost is reduced, harm of heavy metal elements in discharged sludge to the environment is reduced, the method disclosed by the invention has the characteristics of good treatment effect, energy conservation, environmental friendliness and low cost, and can be used for fully utilizing alloy in the sludge containing vanadium and chromium, so that the effect of producing low alloy steel by microalloying is achieved.

The invention belongs to the technical field of sewage processing, and concretely relates to an integrated electrochemical reaction apparatus for processing difficultly degraded organic waste water and a processing method thereof. A housing of a reactor is divided into a circle cavity reaction zone and a cone cavity precipitation zone, a semi-arc ruthenium iridium anode and a semi-arc porous iron net are arranged in the circle cavity reaction zone, the insulation pads which are symmetrically distributed are arranged at the intermediate part, and a stainless steel cathode is arranged in the housing of the reactor; a discharge pipeline is arranged at the bottom of the cone cavity precipitation zone, an water inlet pipe is arranged at the top of the housing of the reactor, a drainpipe is arranged at the bottom of the housing of the reactor; and the semi-arc ruthenium iridium anode, the semi-arc porous iron net and the stainless steel cathode are connected with stabilized power supply. Waste water is introduced into the reactor through the water inlet pipe, the reactor is turned on, the stabilized power supply and a motor are turned on, the cathode is rotated with the motor slowly, the waste water is stirred slowly with the cathode, the waste water is subjected to Fenton-like and electric flocculation reactions near the porous iron net, electrooxidation is generated near the ruthenium iridium anode, the waste water is discharged from the drainpipe, and a precipitate is discharged through the discharge pipeline.

The invention discloses a message processing method. The message processing method includes the following steps. A receiving side receives a message from a sending side. The message at least carries an identifying serial number INum. The INum of the message is compared with a window header value LNum and/or a window end value HNum of a sliding window by the receiving side and whether the message is supposed to be abandoned or not is judged. The invention correspondingly discloses a message processing system. With the message processing method and the message processing system, the sliding window slides based on the window header value (minimum value) and the size of the sliding window is not fixed so that replay attack can be effectively resisted, a good effect of processing a delayed message is achieved and safety and reliability of the system are enhanced.

The invention relates to a pre-treatment technology of 3-chloro-2-hydrazinopyridine production waste water. The pre-treatment technique is characterized by comprising the steps of separating and collecting 3-chloro-2-hydrazinopyridine production waste water, and carrying out separation treatment aiming at the water quality characteristics of all types of waste water. According to the pre-treatment technology of 3-chloro-2-hydrazinopyridine production waste water, the defects that an existing pyridine organic matter production waste water pretreatment technology is high in cost, the reaction conditions are harsh, biochemical inflowing water dilution ratio is large, the treatment is difficult to achieve the standard, and the like can be overcome, the separation collection and separation treatment to the 3-chloro-2-hydrazinopyridine production waste water can be realized, the pretreatment technology is strong in pertinence, strong in practicability, remarkable in effect, lower in cost, and convenient to operate, the biological toxicity of the waste water can be greatly reduced, and the biodegradability of the waste water can be enhanced.

The invention discloses a decoding method for an ultra-low-contrast two-dimension code. The method comprises the following steps that 1, an integral image of a two-dimension code original image is built, and adaptive binarization processing is carried out on the two-dimension code original image through the integral image; 2, median filtering and denoising are carried out on the two-dimension code original image after the binarization processing; 3, the denoised binarization processing is positioned; 4, error detection, error correction and decoding are carried out on extracted information data. The invention further discloses a decoding system for the ultra-low-contrast two-dimension code. The system comprises an adaptive binarization processing module, a median filtering processing module, a positioning module and an error detection, error correction and decoding module. The decoding method and system for the ultra-low-contrast two-dimension code can effectively separate a two-dimension code graph from the background, and are good in low-contrast image processing effect.

The invention discloses a water recycling circulating system, which mainly comprises the treatment process that: sewage flows into a collector well 1 from a water inlet pipeline; larger suspended matters in the sewage are removed in a grid trench 2; the sewage flows into a regulating reservoir 4 and the water amount and quality of the sewage are regulated; the sewage is purified through a composite biofilter system 7 in a biofilter chamber 6; the treated water flows into a middle tank 8 for storage; and the stored water is subjected to subsequent treatment through an artificial wetland 9, namely the treated water is the recycled water for secondary use. Due to the adoption of the composite biofilter system 7, the water recycling circulating system overcomes the defects that the traditional biofilter is easily blocked and the like, greatly improves the treatment efficiency and stability of a reactor, and has the advantages of good treatment effect, low energy consumption, simple and convenient operation, low operating cost, and the like. The water quality of the treated recycled water can reach a national level of discharge standard, an aeration tank, a sedimentation basin, and the like in the traditional recycled water treatment system are saved, and the construction cost is saved.