KR100237041B1 - Apparatus for treating wastewater with trickling filter charged microbe carrier in porous box - Google Patents

Abstract

The present invention relates to a sprinkling water treatment wastewater treatment apparatus packed in a porous box with a microbial carrier capable of highly treating incomplete effluent and domestic wastewater of a livestock wastewater treatment facility. When intermittent or continuous watering of waste water in the spraying water tank (30) in which the microbial carrier, especially the porous box (40) filled with 50% to 95% of the cotton is stacked in multiple layers, the neck is prevented from being pressed and oxygen in the air is removed from the neck without power. As it can supply as much as possible, it can induce the active metabolic activity of aerobic microorganisms in the wood, which can rapidly decompose and destroy biochemical oxygen demand (BOD) source and suspended solids (SS) in waste water. In particular, compared to similar biological treatment facilities such as activated sludge for the purification of live oase, the facility is simple, and it is easy to manage and inexpensive to install because it requires little energy and chemicals.

Description

Sprinkler Award Wastewater Treatment System Filled with Microbial Carrier in Porous Box

The present invention relates to a microbial carrier capable of highly treating incomplete effluent and domestic sewage in livestock wastewater treatment facilities, and in particular, a sprinkling wastewater type wastewater treatment apparatus filled with a wooden box in a porous box.

The types of livestock manure treatment facilities installed by livestock farms are 72% of resources and 26% of purification facilities. 96% of the farms with purification facilities are installed and operated with simplified livestock wastewater septic tanks. Among them, 1,100 farms are purifying livestock urine sewage using sawdust soil filtration facilities.

The simple livestock wastewater septic tank is a method in which organic matter in urine filthy water is decomposed and oxidized by the action of microorganisms, which can perform various functions in the same principle or in a narrow space as the activated sludge method. In many livestock farms, livestock farms and urine sewage are not easily separated, and the facility operation skills are inadequate, and electrical facilities such as aeration systems are not normally operated. If the treated water quality is good, the biochemical oxygen demand (BOD) is about 45-500mg / l, but most of it is 500mg / l, which limits the efficient purification of urine sewage in certain areas.

Sawdust soil filtration is a method of purifying or absorbing contaminants with soil microorganisms and plants after urine sewage separated from the barn is filtered through the sawdust and soil filtration. It is a way. The treated water was reported to be BOD 13.3 mg / l when the operating conditions were optimal, and BOD304 mg / l when the treatment conditions were bad. Disadvantages of this treatment technique include the difficulty of replacing the whole sawdust with new ones every three months and the difficulty of plant growth in the soil. The number of farms installed has decreased to 200 in 1993, 340 in 1994, 420 in 1995, and 140 in 1996.

Due to the increase of water pollution in rivers and lakes caused by livestock wastewater, and the regulation of treated water is strengthened gradually, the post-treatment of incomplete livestock wastewater treatment facilities is a Korean advanced purification treatment that is easy to maintain and low in facility cost and easy to maintain. Technology development is needed.

Active sludge facilities, which form the basis of domestic sewage treatment, require the maintenance and maintenance of complex facilities such as blowers, air supply pipes, defoamers, and sedimentation devices. In addition, secondary pollution is often caused by noise and odor.

Therefore, as a wastewater treatment technology suitable for the conditions of our country, the technology for treatment of sprinkling water treatment using wood chips was developed by the present inventors. This treatment technology is a technology capable of advanced treatment of wastewater without requiring power and chemicals, but there is a problem in the stable treatment because clogging occurs when the wastewater is overloaded.

In other words, the conventional water sprinkling filter apparatus using wood chips did not have a big problem in treatment when wastewater was added according to the treatment capacity, but it was not treated stably when there was a large amount of wastewater load or a change in load.

Cellulose is composed of cellulose, hemicellulose, and lignin, which make up the cell wall of wood, and the load fluctuation of waste water is the main component. As the odor increased due to proliferation, the blockage of the treatment tank was increased.

In order to prevent this, it was necessary to increase the amount of wood filling, so the amount of processing area was excessively consumed, and when it was charged around alleles to increase the oxygen supply, the surface area and residence time were short, resulting in low treatment efficiency. In addition, when supplying oxygen to the water spray tank in order to supply oxygen smoothly, the neck piece was strongly crushed by gravity, which was not easy.

The object of the present invention devised to solve the problems as described above is to supply the oxygen as much as possible without power to the neck piece without being pressed by the water spray gravity to optimize the environmental conditions of microorganisms to quickly decompose and destroy the pollutant of waste water The present invention provides a sprinkler wastewater treatment apparatus filled with a wooden box in a porous box.

Another object of the present invention is to apply to the sprinkling water tank without removing the fine particles in order to use the wood chips more cheaply, and the device to allow the waste water to be sprayed more uniformly in the sprinkler and a simple heating device for freezing prevention The present invention is to provide a sprinkling wastewater treatment device filled with a porous piece of wood that can be stably and highly treated for effluent or domestic wastewater in an unstable livestock wastewater treatment facility.

Figure 1 is a multi-sided view showing the sprinkling water tank filled with the waste water storage tank and the neck piece of the present invention in a porous box.

2 is a perspective view of a porous box used to fill the wood and alleles of the present invention.

3 is a perspective view showing a watering device of the present invention.

* Explanation of symbols for main parts of the drawings

10: wastewater storage tank 11: diaphragm

13: stainless steel mesh 15: wood filter

17: Gravel 19: Pump

20: watering pipe 21: watering device

21a: center tube 21b: wing tube

21c: watering hole 30: watering

31: floor concrete 32: brick

33: prefabricated panel 35: warm light

37: vent hole 39: treated water outlet

40: porous box 40a: pores

40b: handle 40c: support

42: particulate wood 44: opposed wood

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a cross-sectional view showing the wastewater storage tank 10 of the present invention and the sprinkling water tank 30 in which the neck piece is filled in the porous box 40. The wastewater storage tank 10 is provided with a diaphragm 11 therein. Filling the wood filter (15) between the wall (11) and the storage tank (10) is the underground concrete structure to increase the sedimentation efficiency of suspended solids by allowing the waste water to pass from the bottom of the wood filter (15), water spraying tank (30) Lay a 10cm brick (32) on the floor and place the porous box (40) filled with 50 ~ 95% of fine wood chips (43) on the floor from the bottom to the top with no gaps or spaced apart. Stacked in the top, the second floor is a ground structure in which a porous box 40 filled with 50-95% of allele wood pieces (大 粒 木片) 44 is stacked.

That is, in the wastewater reservoir 10, the wastewater is stored and the flow rate is adjusted, and the wastewater passes upwardly through the wood filter 15 installed between the diaphragm 11 and the wall to increase the sedimentation efficiency of the suspended solids.

Wastewater storage tank 10 is a concrete structure of 2.5-3m in depth, the size is 1: 1 compared to the daily throughput, so that the site is easy to secure livestock farms to be 1: 1 or more. The neck filter 15 floats the diaphragm 11 at 30 cm from the floor and installs it in the space between the diaphragm 11 and the reservoir wall. That is, a stainless steel net 13 having a diameter of 5 mm at a height of 100 cm from the bottom of the reservoir is installed horizontally on both walls, and filled with 100 cm on the neck and 20 cm thick of the gravel 17 and the like. Makes it not easy to flow.

As the basic construction of the spraying water tank (30), the floor is made of 30 cm thick concrete (31), and a 30 cm high hill is installed on the outside of the floor so that the treated water does not overflow sideways, and at the same time, the treated water outlet 39 is provided on one side thereof. Form. It is preferable to insulate the treatment tank so that the treatment tank is less affected by the outside temperature by installing the wall and roof with the styrofoam built-in insulation on the outer hill concrete, and the wall made of brick, concrete, wood, etc. It is also possible to install roofs. A ventilation hole 37 is provided under the roof for gas discharge in the treatment tank and circulation of fresh air. The height of the prefabricated building is about 3m and the length of the horizontal and vertical is preferably to be widened to be flexible according to the throughput of the waste water.

As for the wood chips, conifers (pines, pines, etc., pine, cedar (from Japan, Jeju Island, North America)) or hardwoods can be used, and the distribution of wood grains is shown in Table 1 and Table 2. The particle size of the particulate wood piece 42 used in the present invention is 10 mm or less, and the particle size of the allele wood piece 44 is 10 to 60 mm. In addition, the fine particles and bark of the wood pieces can be used with or without removal.

The general components of the wood chips were crude protein 0.31%, crude fat 3.41%, crude fiber 68%, crude ash 1.27%. When the wood pieces were filled in the water spraying tank without pretreatment, the soluble substance and intrinsic color of the wood pieces were eluted into the treated water for a long time. Therefore, it is preferable to wash the wood pieces with water for one month before filling, but since the soluble material and the inherent color are not related to the wastewater treatment, it is also possible to use the wood pieces without washing.

As shown in FIG. 2, the porous box 40 has an area of 50cm in width and 34cm in length, and an area of 52cm in width and 36cm in height in the upper part, and has a shape of 37cm in height. , When filling the neck piece on the wall and bottom of the box, a small hole (40a) is open enough to not fall out and the top is open. The support 40c is formed in the handle 40b part of a box so that a box and a box may not overlap when a box is stacked in multiple layers. That is, the support 40c is formed so as not to overlap when the boxes are stacked on the upper edge of the box. The porous box 40 is designed to drop the waste water excessively so that when the waste water flows down into the side hole of the box, it falls on the upper layer of the box immediately below. The material is plastic, wood (bamboo, etc.), metal (stainless steel, etc.). It is possible to modify the size and shape as appropriate.

The neck piece fills 50-95% of the total capacity of the porous box 40 and the remaining top is left empty for the flow of air. The frame of the porous box 40 serves to prevent the neck piece from pressing from above and air is easily contacted with the filled neck piece because a plurality of pores 40a are drilled on the wall and the bottom.

The porous box 40 is preferably filled with only wood pieces because of its ease of operation and economical efficiency, but the soil, sand, activated carbon, zeolite, volcanic earth, kaolin, and porous plastics, which are carriers of microorganisms, are partially mixed or totally filled with wood pieces. Can also be used.

A layer of 10cm size brick 32 is laid on the bottom of the spraying tank 30 to allow air to flow. The porous box 40 filled with the fine wood chips 42 is placed in close contact with the side box without any gap, or spaced from the side box with some or all of the space between them, stacked in a multi-layered box and stacked in a multi-layered box. Since most of the suspended solids are filtered out to stack the porous box 40 filled with alleles 44 for more air flow and even watering. The porous box 40 may be stacked in a stacked manner, as shown in FIG. 1, in a zigzag manner, or in a suitable manner. The outermost box is stacked 10cm apart from the prefabricated panel (33) wall to have a structure that can easily flow air on the wall.

The height of the sprinkling water tank 30 is based on 2 to 2.5m. In order to purify the effluent and domestic sewage BOD 200mg / ℓ of the livestock wastewater treatment facility to 10mg / l, the daily wastewater treatment volume and the size of the water tank The ratio is 1: 2, and since it is easy to secure a site in a livestock farm, it is preferable to set it as 1: 2 or more.

The watering means is composed of a pump 19 installed in the waste water storage tank 10, a watering device 21 provided in the watering spray tank 30 and the watering pipe 20 connecting between them. As shown in FIG. 3, the sprinkling apparatus 21 has wastewater that has passed through the center tube 21a at the pumping pressure to each wing tube 21b, and at the same time, the sprinkling hole 21c of the wing tube has a porous structure. The box 40 is placed in the center so that each box is evenly sprayed. That is, the sprinkling apparatus 21 moves to the plurality of wing pipes 21b connected to the center pipe 21a through the center pipe 21a by the pumping pressure during the operation of the pump 19 installed in the waste water storage tank 10. At the same time, a plurality of sprinkling holes 21c are formed in the center of the porous box 40 filled with the uppermost opposing pieces 44 so as to be evenly sprinkled.

The waste water storage tank 10 is installed on the wood filter 15 and the pump 19 equipped with an automatic water level sensor and a timer intermittently or continuously for several minutes through the sprinkling pipe 20 for spraying water. Spray it evenly on the box filled with the neck of

After sprinkling, the waste water is filtered through suspended solids while passing through the neck filled in the porous box 40. Then, during the period when water is stopped, the wastewater passes through the cotton pieces, and oxygen in the air is supplied from the slope of the porous box 40 to the active metabolism of the aerobic microorganisms in the wood pieces. Decomposition and extinction.

In addition, by installing a 220W halogen thermal insulation lamp 35 on the roof of the water spraying tank 30, when the room temperature is 10 ° C or less by the temperature control device, it is automatically turned on and turned off above to prevent freezing.

If you can not wash the wood prior to use can be used to wash with water or sewage in the spraying tank (30). The sediment of the waste water storage tank 10 should be cleaned periodically, and if replenishment and exchange of wood is needed, the sprinkler 21 is separated and the porous box 40 is replaced or replenished.

The inside of the porous box 40 filled with a medium serving as a carrier of microorganisms during wastewater treatment is easily supplied with oxygen in the air, thereby breeding the worms (Limnodrilus Socialis) inside the porous box 40 to cause clogging of the treatment tank. Biofilm sandwiched between media serving as a carrier of microorganisms can be digested and decomposed. At this time, it is preferable to install a sedimentation tank which can collect the earthworm after the spraying water tank 30.

When the waste water storage tank 10 or the sprinkling water tank 40 is connected in parallel or in series to treat the waste water, the treated water may be reused as the wash water or the wash water when cleaning.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited to the following Examples.

Example 1

This example was carried out in a licensed pig farm in a specific area where urine sewage was discharged 20 m3 daily. Domestic urine sewage was purified to BOD 454mg / l, suspended solids (SS) 261mg / l, total nitrogen (TN) 130mg / l and total phosphorus (TP) 40mg / l. The BOD 50 mg / L and SS 50-mg / L were well exceeded.

The discharged water from the livestock wastewater treatment facility was treated under the following conditions.

1) Filling of wood in a porous box

The wood pieces were classified into domestic bark pine as fine grains and allelic pieces, and washed with water before use to elute the soluble substance and the color of the tree. The granular wood pieces were stacked in multiple layers by filling 80% of the porous boxes, and the top two compartments were stacked by filling 80% of allelic wood pieces in the same box.

2) waste water storage tank

The wastewater reservoir was made of underground concrete structure with a storage capacity of 40m3 with a width of 4m, a length of 4m and a depth of 3m. The wood filter was installed horizontally with a stainless perforated network 60 cm above the floor between the diaphragm and the wall, and the opposing wood piece was filled 100 cm over the stainless perforated network, and 20 cm was filled with gravel.

3) watering

The total capacity of the spraying tank was 62.5m3 by stacking a porous box filled with 80% of the granular wood to 5m in width, 5m in length and 2.5m in height.

4) watering

The sprayer installed a pump capable of discharging 100 liters per minute on the gravel of the wastewater reservoir, and attached a timer and a water level sensor to allow 416 liters of water to be sprayed at the interval of 30 minutes.

5) Results

The water quality that passed through the wood filter of the wastewater reservoir was BOD 293mg / l, SS 147mg / l, TN 70mg / l and TP 25mg / l, respectively, and showed 35.5%, 43.7, 46.1% and 37.5%, respectively. The water quality of the treated water after passing the sprinkling filter was BOD 15.2mg / l, SS 7.7mg / l, TN 40mg / l, and TP 15mg / l, respectively 96.7%, 97%, 69.2%, 62.5% Was processed. In addition, odor and blockage were not found in the water spray. On the other hand, the sediment of the waste water reservoir was composted by cleaning every six months.

Example 2

The sewage of apartments with 20m3 of daily sewage is discharged under the following conditions.

1) Filling of wood in a porous box

The wood pieces of the pine pine were washed with water before use to elute the soluble substance and the color of the tree. The fine wood pieces were filled with 80% of the porous box, and the boxes were stacked in multiple layers. The top two compartments were packed with 60% of the allele pieces in the same box.

2) waste water storage tank

Wastewater storage tank is underground concrete structure, 2m wide, 2m long, 3m deep, and total waste water of 10㎥ is stored. The wood filter floated the diaphragm 30 cm from the bottom and filled alleles between the diaphragm and the wall from 60 cm above the floor to the bottom of the spray pump.

3) watering

Sprinkler water treatment was made of 40m3 above-ground structure by stacking porous boxes filled with wood pieces up to 4m in width, 4m in length and 2.5m in height.

4) watering

The spray was sprinkled intermittently every 30 minutes by installing a pump capable of discharging 100 liters per minute and attaching a timer and a water level sensor.

5) Results

The water quality of the waste water storage tank was BOD 175mg / l, SS 80mg / l, TN 8.5mg / l, TP 9.1mg / l, and the water quality of the treated water was 8.2mg / l of BOD and 6.7mg / of SS. L, TN 2.1 mg / l, TP 3.2 mg / l, 95.3%, 91.6%, 75.3%, 64.8% were clarified. In addition, odors and blockages were not found in water treatment. On the other hand, the sediment of the waste water storage tank was cleaned once every six months.

Example 3

As in Examples 1 and 2, small experiments were carried out by making various experimental apparatuses to develop a spraying tank having a high purification effect without clogging.

That is, three experiments were performed at two-month intervals using wastewater storage tanks and spraying tanks of the same structure as in FIG. 1 as wastewater (BOD 157mg / l and SS 97mg / l).

1) Experiment apparatus and method

The wastewater reservoir was sized to store 12㎥ per day, and three metering pumps were installed to discharge 20 liters per minute. The pump was operated so that the waste water of 4m 3 in total was sprayed equally to the water spraying tank of 8m 3 (2m wide, 2m high and 2m high) with a sprinkling device as shown in FIG.

The wood pieces were made of the fine grain of the pine pine as shown in Table 1, and the porous box was a rectangular shape with a hole that was not drilled out on the bottom and front and back sides. And a height of 16 cm were used.

The first experiment was carried out for 2 months to investigate the treatment effect of sprinkling water treatment to fill the wooden box in the porous box. Filled with only wood pieces in water spraying equipment (device 1), stacking porous boxes and wood pieces in alternating manner by stacking porous boxes on the first floor and filling the wood pieces (device 2), wood pieces in porous boxes Stacking a box filled with 80% in a multi-layer (device 3) was compared.

In the second experiment, a porous box filled with 80% of the neck pieces was piled up in multiple layers for two months (Storage 4), and a porous box filled with 80% of the neck pieces was stacked in layers with a space of 10 cm from the side box, and In the same structure as the device 5, which is installed in an empty space in the porous box of the upper middle water spray tank for 10 minutes with a 1 / 2HP ring blower that can blow 300 liters per minute. Blowing and stopping for 10 minutes (apparatus 6) were compared.

The third experiment was conducted to compare the cleanup effects of different wood types for two months. In the same water spraying tank as the device 4 of the second experiment, the types of wood chips were filled with Japanese cedar (apparatus 7), rice root (apparatus 8), and meat (apparatus 9).

2) Experiment result

In the first experiment, the height of the necks of the two sprinkling tanks decreased to 15 cm in the device 1 and 5 cm in the device 2 15 days after the waste water was sprayed. Odor occurred in Device 1 after 30 days and did not occur in Device 2 and Device 3. In addition, a slight blockage occurred in device 1. Device 1 and device 2 using a porous box had a 20% reduction in the amount of wood filling compared to Device 1, which only filled the wood. Device 3 also showed the best purification efficiency.

In the second experiment, devices 4, 5, and 6 had no compaction or odor. Device 4 had a small amount of sewage between the walls of the porous box around day 6, and devices 5 and 6 did not observe this phenomenon. Apparatuses 5 and 6 had the advantage of being able to treat stably even if the amount of waste water was a little large, but the disadvantages of difficult construction and high power costs. The treatment efficiencies of the devices 4, 5 and 5 showed similar results.

In the third experiment, a comparative experiment was carried out using the same spraying apparatus as the apparatus 4 of the second experiment. Since the wood was used without washing with water, the soluble substance and color of the wood were eluted and discharged from the treated water for about one month. The treatment effect by wood type did not show a big difference during the experiment.

The present invention is a sprinkling water treatment wastewater treatment device filled with wood pieces in a porous box can be highly treated unstable effluent and domestic sewage of livestock wastewater treatment facilities. That is, by filling and processing the wood pieces in the porous box, the wood pieces are not compacted and oxygen is easily supplied, so that even when the load is rather high, the spraying tank achieves a stable treatment efficiency without clogging.

In addition, by installing a wood filter in the waste water storage tank, it was possible to reduce the amount of suspended solids flowing into the water-steaming tank, and by maximizing the oxygen supply due to the porous box, it is possible to process the waste wood waste by removing the fine particles of the wood. I could save. On the other hand, it was possible to show high treatment efficiency from the initial operation of the treatment facility by washing the wood pieces with water before use in the water treatment tank to elute soluble materials and chromaticity. The designed sprinkling system was able to improve the treatment efficiency per area by allowing the waste water to be evenly sprayed in the spraying tank. In addition, when the waste water is sprinkled, the insulation lamp is turned on by the temperature control device when the room temperature of the treatment tank drops below 10 ° C, thereby preventing freezing and stable treatment of the waste water in winter.

The present invention solves the conventional problem that the sawdust area is frequently blocked and replaced every three months as in sawdust soil filtration as it can be used without replacement of the sprinkler's neck, when air and moisture are continuously supplied to the neck. Corrosion is extremely suppressed, so long wood can be used. Compared to the activated sludge treatment facility for treating domestic sewage, the present invention has a simple method of installing and operating the facility, which enables the consumer to greatly reduce the installation cost of the wastewater treatment facility, and requires no maintenance and maintenance costs due to the lack of complicated machines. do. Also, no chemicals are used, so it does not cause secondary pollution and there is almost no odor.

The device of the present invention has a high treatment efficiency per unit area, and has the advantage of rapidly purifying wastewater in a small area, thus enabling active sludge, simple livestock wastewater septic tank, and unstable effluent water from sawdust filtration operated in a specific livestock farm. It can be effectively applied to the advanced treatment of wastewater from small to medium sized businesses such as apartments, restaurants, shops, and villas in sewage treatment facilities, and after treatment facilities for advanced treatment.

Claims (11)

Sewage water tank 10, and multiple spray holes in the side and bottom and a porous box filled with 50-95% of the total capacity of granular pieces of particle size less than 10mm or alleles of particle size of 10-60mm Sprinkling water treatment wastewater treatment device, characterized in that it comprises a watering means 30 and the watering means for transferring the waste water in the waste water storage tank (10) to the watering spray tank (30) to spray in the water spraying tank (30). The apparatus of claim 1, wherein the medium serving as a carrier of the microorganism is at least one selected from wood chips, soil, sand, activated carbon, zeolite, volcanic earth, kaolin, and porous plastic. The waste water treatment wastewater treatment apparatus according to claim 1, wherein a wood filter (15) is installed in the wastewater storage tank (10) to filter suspended matters of the wastewater. The method of claim 1, wherein the porous box 40 has a plurality of small holes (40a) is formed on the side and bottom and a constant support, characterized in that a plurality of support (40c) is formed so as not to overlap when the box is stacked up Common sense wastewater treatment device. 5. The apparatus of claim 4, wherein the material of the porous box is selected from plastic, wood, and metal. The sprinkling water treatment wastewater treatment apparatus according to claim 1, wherein the porous box (40) filled with the medium serving as the carrier of the microorganisms is stacked in a multi-layer by closely contacting the side box with no gap. The method according to claim 1, wherein the porous box 40 filled with the medium serving as the carrier of the microorganisms is stacked in multiple layers at regular intervals from the side box, and some or all of the space therebetween is filled with the medium serving as the carrier of the microorganisms. Sewage water waste water treatment device characterized in that. The spraying ceremony of claim 1, wherein an air supply pipe is inserted into the spraying tank 30 and forced air is blown into the spraying tank 30 through the air supply pipe by a blower. Wastewater Treatment System. According to claim 1, wherein the sprinkling means is a pump 19 installed in the wastewater storage tank 10, the watering pipe 20 for transferring the wastewater to the sprinkling water tank 30 by the pump 19 and the pumping pressure The waste water passes through the central tube 21a to the plurality of wing tubes 21b connected to the central tube 21a, and the water is evenly sprayed evenly in the center of the porous box 40 filled with the medium serving as the carrier of the microorganisms. The sprinkling water treatment wastewater treatment apparatus, characterized in that the sprinkling hole (21c) is formed of a sprinkling apparatus 21 is formed. The water spray wastewater treatment apparatus according to claim 1, wherein a heat keeping lamp (35) is installed in the water spray filter (30) to maintain the internal temperature of the constant filter tank (30) above a predetermined temperature. The apparatus of claim 2, wherein the neck piece is washed with water to elute the soluble material and chromaticity, and then filled into the porous box (40).

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