CN214612036U - Garbage leachate treatment equipment - Google Patents

Abstract

The utility model relates to a sewage treatment technical field provides a landfill leachate treatment facility. This landfill leachate treatment facility is through setting up preprocessing device in landfill leachate treatment facility, the air supporting device, anaerobic treatment device, biological treatment device, deep purification device, make landfill leachate at the in-process of handling, can detach the floater through preprocessing device and carry out the equilibrium with quality of water, sewage inflow air supporting device after the equilibrium, further quilt is detached flocculent suspended solid and colloid, sewage passes through anaerobic device again, and carry out anaerobic fermentation in anaerobic device, thereby reduce the organic matter concentration in the sewage, sewage inflow biological treatment device, biological treatment device further removes COD in the decontaminating water, organic matters such as ammonia nitrogen, deep purification device separates the micromolecule material in with the sewage, thereby realize landfill leachate's proper treatment.

Description

Garbage leachate treatment equipment

Technical Field

The utility model relates to a sewage treatment technical field especially provides a landfill leachate treatment facility.

Background

With the rapid development of modern cities, municipal waste has become a serious problem disturbing cities. The municipal refuse mainly comprises domestic refuse, construction refuse, industrial refuse, special refuse (mainly from chemical engineering), pharmacy, hospitals, scientific research institutions and the like) and other refuse. The urban garbage treatment method mainly comprises incineration, composting, landfill and the like. In the process of stacking and landfill treatment of garbage, various metabolites and moisture are generated due to anaerobic fermentation, organic matter decomposition, rainwater leaching, underground water soaking and the like, and high-concentration organic wastewater-garbage leachate with complex components is formed in the garbage landfill or garbage incineration plants; after untreated leachate flows through the surface or permeates into underground water, serious secondary pollution is caused to the environment. Therefore, the pollution control of the landfill leachate becomes an important component content of the harmless treatment of the garbage, and is also a very difficult problem in the design, operation and management of the garbage landfill and the garbage incineration plant.

The nature of landfill leachate depends on various factors such as the composition of the landfill, the landfill time, the climatic conditions and the design of the landfill site, and generally has the following characteristics: the water quality is complex and the hazard is large; the COD (Chemical Oxygen Demand, which is the amount of reducing substances to be oxidized in a water sample measured by a Chemical method) and the BOD (Biochemical Oxygen Demand, which is a comprehensive index of the content of aerobic pollutants in water) are high in concentration; the ammonia nitrogen content is high; the color is deep and the odor exists; the water quality changes greatly.

Because the garbage disposal site is often far away from the urban sewage treatment area, the conveying of the percolate causes larger economic burden; in addition, the special water quality and the change characteristics of the percolate easily cause impact load to the municipal sewage treatment plant and even destroy the normal operation of the municipal sewage treatment plant. Therefore, it is necessary to design a treatment device for landfill leachate so as to properly treat the landfill leachate.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a landfill leachate treatment facility aims at solving current landfill leachate thereby can not be handled properly and cause the technical problem of destruction.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a landfill leachate treatment facility, is including the preprocessing device, air supporting device, anaerobic treatment device, biological treatment device, the deep purification device that connect gradually, preprocessing device is arranged in intercepting the floater in the landfill leachate and carries out the equilibrium to quality of water, the air supporting device is arranged in getting rid of flocculent suspended solid and colloid in the landfill leachate, anaerobic treatment device is arranged in reducing the organic matter concentration in the landfill leachate, biological treatment device is arranged in getting rid of the organic matter in the landfill leachate, deep purification device is arranged in getting rid of the micromolecule material in the landfill leachate.

In one embodiment, the pretreatment device comprises a grating and a regulating tank which are connected in sequence, and a submersible sewage pump is arranged at a water outlet of the regulating tank.

In one embodiment, the air flotation device comprises a flocculation dosing mechanism and an air flotation tank, and a water inlet of the air flotation tank is communicated with a water outlet of the pretreatment device and a dosing outlet of the flocculation dosing mechanism.

In one embodiment, the anaerobic treatment device comprises an upflow anaerobic sludge blanket reactor, and a heating mechanism is arranged in a water inlet of the upflow anaerobic sludge blanket reactor.

In one embodiment, the biological treatment device comprises a hydrolysis acidification tank, a contact oxidation tank and a membrane bioreactor which are connected in sequence, wherein the hydrolysis acidification tank is used for carrying out anoxic reaction on the landfill leachate, the contact oxidation tank is used for carrying out aerobic reaction on the landfill leachate, and the membrane bioreactor is used for carrying out sludge-water separation on the landfill leachate.

In one embodiment, the membrane bioreactor is internally provided with an external internal pressure type micro-filtration membrane and an automatic pulse back-flushing device.

In one embodiment, the molecular weight range of the small molecules trapped by the deep purification device is 150-.

In one embodiment, the landfill leachate treatment equipment further comprises an ammonia gas stripping device communicated between the air flotation device and the anaerobic treatment device, and the ammonia gas stripping device is used for converting ammonia nitrogen in the landfill leachate into ammonia gas and then stripping the ammonia gas.

In one embodiment, the ammonia stripping device comprises a PH adjusting mechanism and a stripping tower which are sequentially connected, wherein the PH adjusting mechanism is used for adding alkali to the landfill leachate, and a blower used for stripping the ammonia is arranged in the stripping tower.

In one embodiment, the landfill leachate treatment equipment further comprises a biogas treatment device and a sludge treatment device, wherein an air outlet of the anaerobic treatment device is communicated with the biogas treatment device, and sludge outlets of the pretreatment device, the air flotation device, the anaerobic treatment device and the biological treatment device are communicated with the sludge treatment device.

The utility model has the advantages that: by arranging a pretreatment device, an air floatation device, an anaerobic treatment device, a biological treatment device and a deep purification device in the landfill leachate treatment equipment, so that the garbage percolate can be treated by the pre-treatment device to remove floating objects and balance the water quality, the balanced sewage flows into the air floatation device to be further removed with flocculent suspended matters and colloids, the sewage passes through the anaerobic device and is subjected to anaerobic fermentation in the anaerobic device, thereby reducing the concentration of organic matters in the sewage, then the sewage flows into the biological treatment device, the biological treatment device further removes COD, ammonia nitrogen and other organic matters in the sewage, the deep purification device separates micromolecule substances in the sewage, therefore, the COD concentration, the BOD concentration and the ammonia nitrogen concentration in the treated sewage can be greatly reduced, and the garbage leachate can be properly treated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a landfill leachate treatment facility provided by an embodiment of the present invention;

fig. 2 is a flowchart of a landfill leachate treatment process in a landfill leachate treatment facility provided by an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals: landfill leachate treatment facility-100; a pretreatment device-10; a grid-11; a regulating reservoir-12; submersible sewage pump-121; an air floatation device-20; polyaluminium chloride dosing assembly-21; polyacrylamide drug-adding component-22; an air flotation tank-23; ammonia stripping device-30; pH adjusting mechanism-31; a stripping column-32; anaerobic treatment device-40; an up-flow anaerobic sludge bed reactor-41; heating means-42; biological treatment device-50; a hydrolysis acidification tank-51; a primary contact oxidation pond-52; a secondary contact oxidation pond-53; a membrane bioreactor-54; a deep purification device-60; a biogas processing device-70; sludge treatment device-80.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Please refer to fig. 1-2, it is shown that the utility model discloses a landfill leachate treatment facility 100 that an embodiment provided, including the preprocessing device 10 that connects gradually, air supporting device 20, anaerobic treatment device 40, biological treatment device 50, deep purification device 60, floater in preprocessing device 10 to landfill leachate is intercepted and is carried out the equilibrium to quality of water, air supporting device 20 is arranged in getting rid of the flocculent suspended solid and the colloid in the landfill leachate, anaerobic treatment device 40 is arranged in reducing the organic matter concentration in the landfill leachate, biological treatment device 50 is arranged in getting rid of the organic matter in the landfill leachate, the organic matter that specifically gets rid of is mainly COD, ammonia nitrogen etc, deep purification device 60 is arranged in getting rid of the micromolecule material in the landfill leachate. Specifically, the pretreatment device 10, the air flotation device 20, the anaerobic treatment device 40, the biological treatment device 50, and the deep purification device 60 are connected by pipes.

The utility model discloses a landfill leachate treatment facility 100, through set up and processing apparatus in landfill leachate treatment facility 100, air supporting device 20, anaerobic treatment device 40, biological treatment device 50, deep purification device 60, make landfill leachate be at the in-process of handling, can detach the floater through preprocessing device 10 and carry out the equilibrium with quality of water, sewage after the equilibrium flows into air supporting device 20, further quilt is detached flocculent suspended solid and colloid, sewage passes through anaerobic treatment device again, and carry out anaerobic fermentation in anaerobic treatment device, thereby reduce the organic matter concentration in the sewage, then sewage flows into biological treatment device 50, biological treatment device 50 further removes organic matters such as aquatic of decontamination and ammonia nitrogen, deep purification device 60 separates the micromolecule material in the sewage, so, the COD concentration that is changed in the sewage after being handled, BOD concentration and ammonia nitrogen concentration can reduce by a wide margin, thereby realizing the proper treatment of the landfill leachate.

Referring to fig. 1, in one embodiment, the pretreatment device 10 comprises a grid 11 and a regulating reservoir 12 connected in sequence, and a submersible sewage pump 121 is arranged at the water outlet of the regulating reservoir 12. The grating 11 is composed of a group of parallel grating bars and is obliquely arranged at the water inlet of the regulating tank 12, and the inclination angle of the grating 11 is 60-80 degrees in the embodiment. The body of the adjusting tank 12 is located under the ground, the bottom of the adjusting tank 12 is provided with a steel concrete structure, and the landfill leachate enters the adjusting tank 12 and is temporarily stored in the adjusting tank 12, and then is lifted to the air flotation device 20 through a submersible sewage pump 121 in the adjusting tank 12 for further treatment.

In this embodiment, incoming water passes through the grille 11 device, and various floating objects contained in the sewage are intercepted, so as to prevent blocking a water pump or a treatment device in the subsequent treatment process, prevent the floating objects from precipitating in the subsequent adjusting tank 12, and increase the maintenance frequency of the adjusting tank 12 and even the whole device. The device is used for installing the pump hole of stealthily dirty pump 121 in the equalizing basin 12, and there is certain distance in the position that the pump hole set up apart from the equalizing basin 12 bottom to make the mud in the sewage preliminary sedimentation in equalizing basin 12, the mud after the sediment is not conveyed to in subsequent processing apparatus.

Referring to fig. 1, in one embodiment, the air flotation device 20 includes a flocculation chemical feeding mechanism and an air flotation tank 23, and a water inlet of the air flotation tank 23 is communicated with a water outlet of the pretreatment device 10 and a chemical outlet of the flocculation chemical feeding mechanism.

Wherein, flocculation medicine mechanism includes that polyaluminium chloride adds medicine subassembly 21, polyacrylamide adds medicine subassembly 22, and polyaluminium chloride adds medicine subassembly 21 and polyacrylamide and adds medicine subassembly 22 and all connect in the inlet tube department of air supporting pond 23 to make the sewage that gets into in the air supporting pond 23 fully acted on by the medicament. The sewage after adding the medicine enters the air flotation tank 23 to form highly dispersed micro bubbles, the formed micro bubbles are adhered to solid or liquid particles of a hydrophobic group in the wastewater to form a water-gas-particle three-phase mixed system, and after the particles are adhered to the bubbles, flocs with apparent density smaller than that of the water are formed and float to the water surface to form a scum layer to be scraped, so that solid-liquid separation or liquid-liquid separation is realized, and floc suspended matters and colloids which are difficult to precipitate in the sewage are removed. Specifically, in this example, the mass concentration of the added polyaluminum chloride is 10%, and the mass concentration of the added polyacrylamide is 0.3%.

Referring to fig. 1, in one embodiment, the anaerobic treatment device 40 includes an upflow anaerobic sludge blanket reactor 41, and a heating mechanism 42 is disposed in a water inlet of the upflow anaerobic sludge blanket reactor 41. The heating mechanism 42 is arranged in the water inlet of the up-flow anaerobic sludge bed reactor 41, so that the temperature of anaerobic reaction of sewage can be increased, and organic matters in the sewage can be better removed.

Wherein, the anaerobic reaction process in the upflow anaerobic sludge blanket reactor 41 comprises hydrolysis, acidification, acetic acid production, methane production and the like. Different microorganisms participate in the conversion process of the substrate to convert the substrate into final products, namely inorganic substances such as methane, water and the like.

The anaerobic microorganisms participating in the reaction during the anaerobic digestion reaction are mainly the following ones:

hydrolysis-fermenting (acidifying) bacteria, which hydrolyze and ferment substrates with complex structures into various organic acids, ethanol, sugars, hydrogen and carbon dioxide;

② acetogenic bacteria, which convert the products of the first hydrolytic fermentation into hydrogen, acetic acid and carbon dioxide;

③ methanogens, which convert simple substrates such as acetic acid, methanol and carbon dioxide, hydrogen, etc. to methane.

In this embodiment, the upflow anaerobic sludge blanket reactor 41 is composed of a sludge reaction zone, a gas-liquid-solid three-phase separator and a gas chamber. A large amount of anaerobic sludge is reserved in the bottom reaction zone, and sludge with good settling property and coagulation property forms a sludge layer at the lower part. The sewage to be treated flows into the upflow anaerobic sludge blanket reactor 41 from the bottom to be mixed and contacted with the sludge in the sludge blanket, and the microorganisms in the sludge decompose the organic matters in the sewage and convert the organic matters into the methane. Biogas is continuously discharged in the form of micro bubbles, the micro bubbles are continuously combined in the rising process to gradually form larger bubbles, sludge with thinner sludge concentration is formed at the upper part of the upflow anaerobic sludge blanket reactor 41 due to the stirring of the biogas and rises together with water to enter the three-phase separator, when the biogas touches a reflecting plate at the lower part of the separator, the biogas is folded around the reflecting plate and then passes through a water layer to enter a gas chamber, the biogas concentrated at the gas chamber is guided out of the upflow anaerobic sludge blanket reactor 41 by a guide pipe, solid-liquid mixed liquid enters a settling zone of the three-phase separator through reflection, the sludge in the sewage is flocculated, particles are gradually increased and are settled under the action of gravity. The sludge deposited on the inclined wall slides back to the anaerobic reaction zone along the inclined wall, so that a large amount of sludge is accumulated in the reaction zone, and treated effluent separated from the sludge overflows from the upper part of an overflow weir of the deposition zone, then is discharged out of an upflow anaerobic sludge blanket reactor 41 and flows into a biological treatment device 50 through a connecting pipe to be further treated.

Referring to fig. 1, in one embodiment, the biological treatment apparatus 50 comprises a hydrolysis acidification tank 51, a contact oxidation tank and a membrane bioreactor 54 connected in sequence, wherein the landfill leachate is subjected to an anoxic reaction in the hydrolysis acidification tank, and for better treatment, the contact oxidation tank comprises a primary contact oxidation tank 52 and a secondary contact oxidation tank 53 connected in sequence, the landfill leachate is subjected to an aerobic reaction in the primary contact oxidation tank 52 and the secondary contact oxidation tank 53, and the landfill leachate is subjected to sludge-water separation in the membrane bioreactor 54. Thereby effectively removing ammonia nitrogen in sewage and reducing COD concentration of sewage.

In one embodiment, the membrane bioreactor 54 includes an external internal pressure microfiltration membrane and an automatic pulse back flushing device. The micro-filtration membrane and the automatic pulse back-flushing device can remove the micro-substances which are difficult to treat in the sewage.

In particular, the microfiltration membrane can retain particles between 0.1 and 1 micron. Microfiltration membranes allow the passage of large molecules and dissolved solids (inorganic salts) etc., but retain suspended matter, bacteria, and high molecular weight colloids etc. The separation mechanism of the micro-filtration membrane is mainly sieving and trapping. The automatic pulse back-flushing device consists of a cylinder body, a stainless steel filter screen, a sewage discharge part, a transmission device and an electric control part. When the backwashing device works, water to be filtered flows through the filter screen and enters the pipeline through the water outlet to carry out process circulation, and particle impurities in the water are intercepted inside the filter screen. So continuous circulation, the granule that is held back is more and more, filter speed is more and more slow, and the sewage of import still constantly gets into, the filtration pore can be more and more littleer, from this at the water inlet, produce pressure differential between the delivery port, when the difference in height reaches the setting value, differential pressure transmitter conveys the controller with the signal of telecommunication, the controller starts driving motor and drives the axle through drive assembly and rotate, the drain is opened simultaneously, discharge by the drain, after the filter screen washs and finishes, the pressure differential minimum falls to, the device returns initial filtration form, and normal operating.

In one specific embodiment, the molecular weight range of the small molecules trapped by the deep purification device 60 is 150-. The deep purification device 60 is provided with a nanofiltration membrane which is a charged membrane and can carry out electric adsorption. The water is produced under the same water quality and environment, and the pressure required by the nanofiltration membrane is less than that required by the reverse osmosis membrane. The separation mechanism of the nanofiltration membrane is the coexistence of sieving and dissolving diffusion, and simultaneously has a charge repulsion effect, can effectively remove substances with the molecular weight range of 150-2000-one-year-old, can also remove a small amount of inorganic salt, and has the advantages of partial removal of monovalent ions, low process osmotic pressure, low operation pressure, low energy consumption and the like.

As shown in the figure, in an embodiment, the landfill leachate treatment equipment 100 further comprises an ammonia gas stripping device 30 connected between the air flotation device 20 and the anaerobic treatment device 40, wherein the ammonia gas stripping device 30 converts ammonia nitrogen in the landfill leachate into ammonia gas and then performs stripping. The sewage flows out of the air flotation device 20 and enters the ammonia gas stripping device 30, and the ammonia in the sewage is removed by the ammonia gas stripping device 30 and then enters the anaerobic treatment device 40 to be treated.

In a specific embodiment, the ammonia stripping device 30 comprises a PH adjusting mechanism 32 and a stripping tower 31 connected in sequence, wherein the PH adjusting mechanism 32 adds alkali, and the stripping tower 31 is provided with a blower. The PH adjusting mechanism 32 adjusts the water quality of the sewage to be alkaline, so that ammonia nitrogen in the sewage is converted into free ammonia, and then the free ammonia can be blown off by using an air blower in the blow-off tower 31, so that ammonia in the sewage is removed.

In an alternative embodiment, in order to more perfectly treat the landfill leachate, the landfill leachate treatment equipment 100 further comprises a biogas treatment device 70 and a sludge treatment device 80, wherein an air outlet of the anaerobic treatment device 40 is connected to the biogas treatment device 70, so that biogas generated in an anaerobic reaction is properly treated, and thus the safety of the whole treatment equipment is not threatened, and the sludge outlets of the pretreatment device 10, the air flotation device 20, the anaerobic treatment device 40 and the biological treatment device 50 are connected with the sludge treatment device 80, so that sludge in the pretreatment device 10, the anaerobic treatment device and the biological treatment device 50 enters the sludge treatment device 80 to be properly treated, and thus the environment is not polluted by residual sludge. The arrangement of the methane treatment device 70 and the sludge treatment device 80 enhances the shock resistance of the device and reduces the risk to the environment.

In the landfill leachate treatment apparatus 100 of this embodiment, after the landfill leachate is treated in all the treatment devices, the effluent enters the clean water tank, and is discharged after reaching standards, and the concentrated solution flows back to the landfill site. Each processing apparatus in this embodiment integrates the subregion setting according to processing function's difference, has and takes up an area of fewly, and the energy consumption is low, and it is convenient to maintain, and it is stable to go out water, and the operation is simple, advantages such as degree of automation height.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a landfill leachate treatment facility which characterized in that: including preprocessing device, air supporting device, anaerobic treatment device, biological treatment device, the deep purification device who connects gradually, preprocessing device is arranged in intercepting the floater in landfill leachate and carries out the equilibrium to quality of water, the air supporting device is arranged in getting rid of flocculent suspended solid and colloid in the landfill leachate, anaerobic treatment device is arranged in reducing the organic matter concentration in the landfill leachate, biological treatment device is arranged in getting rid of the organic matter in the landfill leachate, deep purification device is arranged in getting rid of the micromolecule material in the landfill leachate.

2. The landfill leachate treatment plant of claim 1, wherein: the pretreatment device comprises a grid and an adjusting tank which are connected in sequence, and a submersible sewage pump is arranged at a water outlet of the adjusting tank.

3. The landfill leachate treatment plant of claim 1, wherein: the air flotation device comprises a flocculation dosing mechanism and an air flotation tank, wherein a water inlet of the air flotation tank is communicated with a water outlet of the pretreatment device and a drug outlet of the flocculation dosing mechanism.

4. The landfill leachate treatment plant of claim 1, wherein: the anaerobic treatment device comprises an up-flow anaerobic sludge bed reactor, and a heating mechanism is arranged in a water inlet of the up-flow anaerobic sludge bed reactor.

5. The landfill leachate treatment plant of claim 1, wherein: the biological treatment device comprises a hydrolysis acidification tank, a contact oxidation tank and a membrane bioreactor which are sequentially connected, wherein the hydrolysis acidification tank is used for carrying out anoxic reaction on the landfill leachate, the contact oxidation tank is used for carrying out aerobic reaction on the landfill leachate, and the membrane bioreactor is used for carrying out mud-water separation on the landfill leachate.

6. The landfill leachate treatment plant of claim 5, wherein: an external internal pressure type micro-filtration membrane and an automatic pulse back-flushing device are arranged in the membrane bioreactor.

7. The landfill leachate treatment plant of claim 1, wherein: the molecular weight range of the small molecules intercepted by the deep purification device is 150-2000.

8. The landfill leachate treatment plant of claim 1, wherein: the landfill leachate treatment equipment further comprises an ammonia gas stripping device communicated between the air floatation device and the anaerobic treatment device, and the ammonia gas stripping device is used for converting ammonia nitrogen in the landfill leachate into ammonia gas and then stripping the ammonia gas.

9. The landfill leachate treatment plant of claim 8, wherein: the ammonia stripping device comprises a PH adjusting mechanism and a stripping tower which are sequentially connected, wherein the PH adjusting mechanism is used for adding alkali to the landfill leachate, and an air blower used for stripping the ammonia is arranged in the stripping tower.

10. The landfill leachate treatment plant of any one of claims 1 to 9, wherein: the landfill leachate treatment equipment further comprises a biogas treatment device and a sludge treatment device, wherein an air outlet of the anaerobic treatment device is communicated with the biogas treatment device, and sludge outlets of the pretreatment device, the air flotation device, the anaerobic treatment device and the biological treatment device are communicated with the sludge treatment device.

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