KR20070012971A - Purifying system of excretions using microorganism - Google Patents

Abstract

A purifying system of livestock waste using microorganisms which controls quality of effluent to a more excellent level and reduces odor of a raw excrement storage tank by substantially lowering a contamination level of residual contamination source after purification of livestock waste as compared with a prescribed standard contamination level for purification of an ordinary septic tank is provided. The purifying system of livestock waste using microorganisms comprises: a raw excrement storage tank(10) having a medium(80) for activating microorganisms to circulate and supply the activated microorganisms; bioreactors(20,30) connected to the raw excrement storage tank by transfer lines; a solid-liquid separator(40) which is connected to the bioreactors by transfer lines, and has a compression dewatering unit(50) integrally formed on a lower part thereof to finally separate a solid component and a liquid component; an aerator(60) for supplying oxygen to the medium of the raw excrement storage tank and to the bioreactors; and a microorganism culture aquarium(70) for culturing microorganisms to circulate and supply, or simply supply the cultured microorganisms, wherein a first supply pipe(110) and a first recovery pipe(120) are installed between the microorganism culture aquarium and the medium, a second supply pipe(115) and a second recovery pipe(125) are also installed between the microorganism culture aquarium and the medium, and a third recovery pipe(127) is installed between the microorganism culture aquarium and the solid-liquid separator.

Description

Livestock manure purification system using microorganisms {PURIFYING SYSTEM OF EXCRETIONS USING MICROORGANISM}

1 is a schematic view of an activated sludge treatment apparatus of a septic tank according to the prior art;

2 is a livestock manure purification system using a microorganism according to the present invention;

Figure 3 is an enlarged perspective view of the carrier in the livestock manure purification system according to the present invention;

Figure 4 is a view showing in detail the solid-liquid separator in the livestock manure purification system according to the present invention; And

5 is a view showing in detail the compression dehydration apparatus in the livestock manure purification system according to the present invention.

<Explanation of symbols for main parts of drawing>

10: raw manure storage tank 20: primary microbial reaction tank

30: secondary microbial reactor 40: solid-liquid separation device

50: compression dehydration device 60: aeration device

70: microbial culture tank 110: the first supply pipe

115: second supply pipe 120: first recovery pipe

125: second recovery pipe 127: third recovery pipe

The present invention relates to a livestock manure purification system using microorganisms, and more specifically, by using a microorganism culture tank and a carrier, the purification effect is much superior to those of the conventional methods, and there are some effects of denitrification and dephosphorization and removal of odors. It relates to a livestock manure purification system using microorganisms that are also effective.

Conventional microbial methods are divided into aerobic microbial methods and anaerobic microbial methods. If necessary, two types of methods may be mixed and used as a new method. The most commonly used method of purifying livestock manure is the activated sludge method adopted by most septic tanks. The activated sludge method is based on aerobic processes, and the livestock manure that enters the aeration tank is decomposed by microorganisms to metabolize suspended organic matter through biological metabolism, but the removal of phosphorus, nitrogen and heavy metals is active. The sludge process is difficult to treat, and is separately performed in an advanced treatment process. Vulnerability of the activated sludge method is difficult to maintain proper conditions for the normal operation of the process, such as bulking phenomenon frequently, and requires careful process control. Also, after a certain period of time, they often lose their function. As a result, the BOD of the effluent treated by a large number of activated sludge methods exceeds the legal standard in a little older facility.

Although it is not well used for the purification of livestock manure, it is used for general wastewater treatment and another method that utilizes the recently developed microorganism is the microbial filter method. It can be dense and aerated to pass the wastewater while supplying air, thereby increasing the area and time that the wastewater comes into contact with the bed or carrier so that the biometabolism can be more active than the activated sludge method.

Typical examples are the sprinkling filter method and the rotating disc method, and these methods allow a wider variety of species to be attached to the bed than the activated sludge method to metabolize the organism in aerobic conditions and to perform some anaerobic processes. This is because anaerobic and aerobic microorganisms may coexist depending on the layer because the dense microorganisms that survive by attaching to the bed are layered.

In addition, the microbial membrane method, which has many similarities with the microbial filter method, has been introduced.In the microbial membrane method, the microorganisms that fill the entire reaction tank with a porous medium without the filter or the carrier are filled with a porous medium to metabolize the medium, and at the same time, the medium has a filtration function. In addition, the treatment speed of the wastewater is faster than the microbial filter method, and the water quality after the wastewater treatment is excellent. On the other hand, there is a disadvantage in that the medium must be frequently backwashed. As described above, the filtration method and the microbial membrane method can proceed an anaerobic process based on aerobic conditions, and can simultaneously decompose organic matters and remove nitrogen, phosphorus, and heavy metals on organic matters. By integrating the treatment, the overall process is simplified, water quality is also better than conventional methods, and the density of microorganisms is high, which shortens the treatment time of water, which is recognized as the most advanced technology.

However, the conditions for maintaining the process are still demanding, requiring careful process control, large-scale investment in the installation of the filter bed, and frequent backwashing of the medium using the microbial membrane method. .

The conventional livestock manure treatment process by a typical representative activated sludge method is as shown in Figure 1, through the net (1) for forced transport in the raw manure storage tank to filter out contaminants, and settling heavy particles such as sand in the stabilizer (2) The concentration of the influent wastewater is adjusted, and it flows into the first contact aeration tank 3 and the second contact aeration tank 4 to perform bio metabolism in the aeration conditions. Finally, the sludge is precipitated in the settling tank 5 and the upper liquid is filtered. After filtration, it is discharged. In order to meet the concentration, a solid-liquid separation process with a separate facility may be provided between the stabilizer tank 2 and the contact aeration tank 3 to separate the solid content of the manure and the liquid.

Sediment precipitated in each tank has to be removed separately intermittently, there is a problem that generates odor during the storage for a certain period of time in the sedimentation state, the structure of the septic tank is very uncomfortable and difficult to remove the sediment There is. Filtration tanks also need to be cleaned or replaced as the filtration material fills the pores of the filter media, which is also difficult to manufacture.

An object of the present invention was devised to solve the above problems, by utilizing microorganisms, the level of the remaining pollutant after the purification process of livestock manure is significantly lower than the statutory standard for the purification process of the septic tank, the discharge water quality is much lower. It is to provide a livestock manure purification system using microorganisms to achieve an excellent level and to reduce the odor of the raw manure storage tank.

In order to achieve the above object, the livestock manure purification system using a microorganism according to the present invention comprises a raw manure storage tank having a carrier for circulating supply by activating the microorganism; A microbial reaction tank connected to the raw manure storage tank by a transfer line; A solid-liquid separator connected to the microbial reaction tank by a transfer line and having a compression dehydration device integrally installed at the bottom to separate the solid and the liquid; An aeration device installed to supply oxygen to the carrier of the raw manure storage tank and the microbial reaction tank; And microbial culture tank for circulating supply or simple supply by culturing microorganisms;

Between the microbial culture tank and the carrier, a first supply pipe and a first recovery pipe for circulating and supplying microorganisms are installed, and a second supply pipe and a second supply pipe for circulating or simply supplying microorganisms between the microbial culture tank and the microbial reaction tank. A recovery pipe is installed, and a third recovery pipe for recovering microorganisms is installed between the microbial culture tank and the solid-liquid separation device.

The carrier is characterized in that it comprises an outer mold and a porous membrane attached to the mold.

The microbial reactor is characterized in that at least one or more are connected in parallel.

The solid-liquid separator, the bottom of the precipitation tank having a funnel shape; A partition wall extending downward from the center of the upper wall inside the sedimentation tank and extending to block the top; A filter medium partially installed at a lower end of the partition wall; A discharge pipe installed to discharge the filtered liquid passing through the filter medium on an outer wall of the settling tank at the top of the filter medium; A third recovery pipe installed on the outer wall of the settling tank at the bottom of the filter medium to recover the liquid before being filtered including the microorganisms into the microbial culture tank; An opening and closing device integrally installed at a lower end of the settling tank; And a compression dehydration device connected to the lower end of the opening and closing device.

The compression dewatering device has an outer tube and a porous wire mesh for separating solids and liquids therein, and a liquid container for collecting the liquid passing through the wire mesh is integrally formed in the lower portion of the outer tube. And a liquid recovery line for transferring the liquid collected from the liquid reservoir to the raw manure storage tank.

Hereinafter, with reference to the accompanying drawings will be described in detail for the livestock manure purification system using a microorganism according to the present invention.

As shown in Figure 2, livestock manure purification system using a microorganism according to the present invention is connected to the raw manure storage tank 10, the raw manure storage tank 10 located in the lower part of the livestock livestock barn by a transfer line 131 Primary microbial reaction tank 20, the secondary microbial reaction tank 30 connected to the primary microbial reaction tank 20 by the transfer line 133, connected to the secondary microbial reaction tank 30 by the transfer line 135 Solid-liquid separator 40 and a microbial culture tank 70 for circulating and supplying microorganisms.

In addition, the raw manure storage tank 10 is provided with a carrier 80 for circulating supply by activating microorganisms. The carrier 10 receives the activated microorganisms from the microbial culture tank 70 installed outside to proliferate and culture the microorganisms, and serves to circulate the microorganisms to the microbial culture tank 70.

The microbial culture tank 70 stores the concentrated microbial culture solution. In addition, a first supply pipe 110 and a first recovery pipe 120 for circulating and supplying microorganisms are installed between the microorganism culture tank 70 and the carrier 80, and the microorganism culture tank 70 and the A second supply pipe 115 and a second recovery pipe 125 for circulating and supplying microorganisms are also installed between the first microbial reaction tank 20.

In addition, a third recovery pipe 127 for recovering microorganisms is installed between the microbial culture tank 70 and the solid-liquid separator 40.

Optionally, the microbial supply pipe and the recovery pipe may be installed between the microbial culture tank 70 and the secondary microbial reaction tank 30.

Although not shown, a circulation pump for circulating microorganisms is built in the microbial culture tank 70.

The raw manure storage tank 10 and the primary microbial reaction tank 20 is provided with an diffuser (65) extending from the aeration device 60, supplying oxygen for microbial growth.

At the bottom of the solid-liquid separator 40, a compression dehydration apparatus 50 for finally separating the solids and the liquid is installed.

As mentioned above, the microbial supply pipes serve to supply microorganisms from the microbial culture tank 70, and the microbial recovery pipes collect the microorganisms propagated through activation of the microorganisms in each process in the microbial culture tank 70. Play a role in making it available.

Hereinafter, each component will be described in detail with reference to the drawings.

<Microbial culture tank (70)>

In the present invention, a microbial culture tank 70 for supporting and controlling the entire system as an assurance measure for operating the entire purification treatment system as intended is included in the system. Such a technique is an original technique not found in any conventional method.

The microbial culture tank 70 is a device for maintaining aeration conditions and storing or cultivating microorganisms suitable for livestock manure at a high concentration for a predetermined period of time through a microbial supply pipe and a recovery pipe for each process requiring support or control in livestock manure treatment. Alternatively, multiple pumps can circulate or simply feed microorganisms.

The material of the microorganism supply pipe and the recovery pipe may be selected an appropriate material in consideration of economic aspects such as plastic, metal or glass.

The microorganism culture tank 70 and the (circulation) supply device is always in operation to allow a fixed trace amount per unit time set in consideration of the processing capacity in advance. The structure of the microbial culture tank is similar to that of general culture tanks.

<Raw manure storage tank (10)>

In the present invention, the process is constituted from the raw manure storage tank 10 of the barn, which is a process that cannot be handled by the conventional activated sludge method and is an original technology that is not adopted in any method.

As shown in FIG. 2, the aeration device 60 and the diffuser 61 are installed with the carrier 80 containing the cultured microorganisms in the raw manure storage tank 10 at the bottom of the slurry pig sand. Let's do it. The microbial carrier 80 is supplied with the activated microorganisms from the microbial culture tank 70 in the outside to maintain the activation in the original intended direction. The carrier 80 may have various shapes such as a columnar shape or a rectangular shape. As shown in FIG. 3, the carrier 80 may have various shapes such as a dense net and a porous membrane having a lot of space, so as to maintain the shape. It consists of 83. As shown in FIG. 3, the membrane 83 of the carrier 80 allows the liquid in which the microorganisms in the carrier survive and the liquid of the raw manure storage tank 10 to gradually enter and mix. In addition, the liquid in the carrier 80 is circulated with the liquid in the microorganism culture tank 70 in a state where some raw manure liquid has entered.

That is, the microorganism is supplied into the carrier 80 through the first supply pipe 110, and the membrane 83 of the carrier 80 is operated between the supplied microorganisms and the microorganisms present in the raw manure by the operation of the carrier 80. Adaptation begins, and the active region of the activated microorganism is formed outside the carrier membrane 83 and gradually widens, finally overcoming the resistance of the existing microorganisms in the reservoir over a period of time and becoming a dominant species. The activated microorganism is recovered to the microbial culture tank 70 through the first collecting pipe 120 together with the liquid of some raw manure.

The activation of these microorganisms may vary depending on the size of the original manure storage tank 10, the size of the carrier 80, and the concentration of manure, and usually takes about one week.

From then on, all microbial metabolism is controlled and directed in the intended direction. In addition, as the atmosphere mainly composed of anaerobic microorganisms is converted into an aerobic metabolic environment, a significant portion of the odor generated in the raw manure storage tank is removed.

The material of the membrane 83 may include various materials capable of exchanging liquids such as dense metal mesh, nonwoven fabric, plastic of woven tissue, cellulose of woven tissue and its derivative compound, and synthetic resin film having fine pores by electron beam or high voltage discharge. Can be used.

<Primary microorganism reaction tank (20)>

The microorganisms activated from the raw manure storage tank 10 are pumped to the manure that is stabilized as the dominant species by pumping aeration through the aeration device 60 and the diffuser (63) and continues the microbial metabolism for a certain time. The first microbial reaction tank 20 is provided with a second supply pipe 115 for supplying microorganisms and a second recovery pipe 125 for recovering the microorganisms. The structure is similar to the general activated sludge tank, but if necessary, a separate carrier, which is the same as the carrier 80 installed in the original manure storage tank 10, may be additionally installed in the primary microbial reactor 20, or only the microorganism supply pipe 115 By installing the microorganisms from the microbial culture tank 70 installed in the outside to the reaction tank 20 can be additionally simply supplied.

The residence time of the primary microbial reactor 20 is several hours and may be longer depending on the throughput. Odor is hardly generated and the amount of metabolism by microorganisms is much higher than that of conventional activated sludge. Microorganisms are attached to suspended organic matter including solids of manure, and many small centimeters of flocs (flocs) are generated and are evenly distributed on the upper surface of the liquid and in the liquid. In aerobic conditions, denitrification and dephosphorization are also partially carried out by the action of microorganisms that denitrify and the action of microorganisms that ingest excessive phosphorus. Pseudomonas denitrificans (Pseudomonas denitrificans) is a representative microorganism that denitrifies in aerobic conditions, and acetobacter (Acetobacter) is a typical example of the over-phosphorus microorganisms.

<Secondary microorganism reaction tank (30)>

The function is the same as the primary microbial reactor 20, and the operating conditions are the same. It is not essential and is usually installed for the purpose of ensuring the biometabolism, suppressing the possibility of bulking, and smoothing the cleansing process by arranging the raw manure processing amount and processing time. In the first microbial reactor 20 is transferred through the transfer line 133 and the pump to further dephosphorization and denitrification. The residence time is also the same as in the first microbial reactor 20.

If necessary, the secondary microbial reaction tank 30 may also be provided with a supply pipe for supplying microorganisms from the microbial culture tank 70 and a recovery tube for recovering the microorganisms into the microbial culture tank 70.

<Solid-liquid separator (40)>

As shown in Figures 2 and 4, the solid-liquid separator 40 extends so as to block the top down and down vertically from the center of the upper wall of the settling tank 49, the bottom of the settling tank 49 inside the funnel shape. And a partition wall 41 to be installed, and a filter medium 43 partially installed at a lower end of the partition wall 41. In addition, a discharge pipe 45 for discharging the filtered liquid passing through the filter medium 43 is installed on the outer wall of the settling tank 49 at the upper end of the filter medium 43, and on the outer wall of the settling tank 49 at the bottom of the filter medium 43. A third recovery pipe 127 is provided for recovering the liquid before the filtration containing the microorganisms into the microorganism culture tank 70.

In addition, the lower end of the settling tank 49 is provided with an opening and closing device 48, the lower end of the opening and closing device 48 is connected to the compression dehydration device (50).

The solid-liquid separator 40 does not have an aeration facility, and the solids are sent to the compression dehydrator 50 integrally mounted at the lower end portion of the sedimentation tank 49, which is part of the solid-liquid separator 40, and the liquid portion is inside the solid-liquid separator 40. Discharge through the discharge pipe 45 via the filter medium 43 installed in the.

The filter medium 43 is not limited to a specific material, and the filtration capacity may be set so that the discharge water quality is equal to or higher than the statutory standard, and an appropriate filter medium 43 generally known may be used.

Filtration method also includes upflow filtration to flow the liquid to be filtered upwards, downflow filtration to flow downward, and horizontal flow filtration to flow sideways. Can be used. In the present invention, an upflow filtration method will be described as an example. As shown in FIG. 4, the partition 41 is partially installed so that the upper portion of the solid-liquid separator 40 passes downward in the vertical direction and the upper portion is blocked, and the filter medium 43 is positioned lower than the total liquid level. Therefore, the natural pressure is formed by the gravity is filtered upward. Filtration and discharge are continued until the level of the whole liquid is equal to the filter medium 43.

The solid-liquid separator 40 does not have an aeration facility, and the intermediate treatment liquid and microbial agglomerates (flocs) attached to the pump from the secondary microbial reactor are larger than the flocs by the activated sludge method and have a relatively high agglomeration density. It settles quickly because it is high, and sedimentation is completed over about 2 hours regardless of whether a liquid passes through the filter medium 43. The amount of solids on the lower part of the filter medium moving along the liquid is small, but as a result of continuous filtration for a certain period of time, the size of the solid is removed from the filter medium and settles. The solids at the time of desorption are relatively small in size and usually have a thickness of several millimeters or less.

And the sedimentation tank 49 of the solid-liquid separator 40 is blocked by the switchgear 48 so that the settled solids can be stored for a short period of time, and mainly by pressing the dehydration device by opening the switchgear 48 to discharge the solids. The inclination is given to slide down to 50. The slope may be given on one side, on both sides, or on multiple sides, depending on the size and placement of the compressed discharge device, as shown in FIG.

<Compression dewatering device 50>

Solids precipitated and accumulated in the lower portion of the solid-liquid separator 40 are connected to the upper portion of the compression dehydration device 50 when the opening and closing device 48 at the lower end is opened by manual or electric power. A detailed view of the compression dewatering device 50 is shown in FIG. The dewatering device 50 is made of a perforated metal plate 53 having a plurality of holes perforated so that the outer tube 51 has a thickness or a suitable thickness of several millimeters (53), or a dense wire mesh (55) and Less dense but sturdy wire meshes are sequentially layered or consist of dense wire meshes and perforated metal sheets. Instead of perforating, the metal plates can be grooved with a wide gap, and steel bars can be arranged at regular intervals to replace the metal plates.

The lower portion of the outer tube 51 is formed with a liquid reservoir 200 for collecting the liquid passing through the wire mesh 55, the liquid collected in the liquid reservoir 200 is a liquid recovery line ( Through 210 is recovered to the raw manure storage tank (10).

The inside of the tube (barrel) is provided with a screw 57 is configured to rotate a plurality of blades around the axis mounted along the direction of the tube, the drive motor 59 is connected to the screw 57. The screw 57 applies a low pressure to the solids by using the rotational force of the blade to squeeze out the liquid while squeezing the liquid, and the excess liquid component squeezes out of the tube through a hole or a wire mesh drilled around the tube. The liquid coming out of the tube is collected in the sump container 200 mounted at the lower end of the compression dehydration device 40 and is naturally conveyed by gravity or is forcibly returned to the raw manure storage tank 10 by a pump. The return liquid, which contains some fine solids, contains microorganisms, and these microorganisms metabolize again in the raw manure storage tank 10.

As mentioned above, according to the present invention, the liquid discharged through the filter medium 43 of the solid-liquid separator 40 has some microorganisms, but there is no problem on the basis of discharged water quality, and phosphorus and nitrogen are also partially removed. As it is, it is superior to the quality of the treated water treated through the general activated sludge tank.

In addition, by utilizing microorganisms, the level of remaining pollutants after the livestock manure purification process is significantly lower than the statutory standard for the purification process of the general septic tank, which makes the discharged water quality much better and reduces the odor of the raw manure storage tank. There is an advantage.

Claims (5)

Raw manure storage tank 10 having a carrier 80 for circulating supply by activating microorganisms; A microbial reaction tank connected to the raw manure storage tank 10 by a transfer line; A solid-liquid separator 40 which is connected to the microbial reaction tank by a transfer line and is integrally provided with a compression dehydration device 50 for finally separating solids and liquids at a lower end thereof; An aeration device (60) installed to supply oxygen to the carrier (80) of the raw manure storage tank (10) and the microbial reaction tank; And Includes; microbial culture tank 70 for circulating supply or simple supply by culturing microorganisms, Between the microbial culture tank 70 and the carrier 80 is provided with a first supply pipe 110 and the first recovery pipe 120 for circulating and supplying microorganisms, the microbial culture tank 70 and the microbial reaction tank A second supply pipe 115 and a second recovery pipe 125 for circulating or simply supplying microorganisms are installed between the microorganisms and the microbial culture tank 70 and the solid-liquid separator 40 to recover the microorganisms. Livestock manure purification system using microorganisms, characterized in that the third recovery pipe 127 is installed. The method of claim 1, The carrier 80, Livestock manure purification system using microorganisms, characterized in that it comprises an outer mold (81) and a porous membrane (83) attached to the mold. The method of claim 1, Livestock manure purification system using microorganisms, characterized in that the microbial reaction tank is installed at least one connected in parallel. The method of claim 1, The solid-liquid separator 40, A settling tank 49 having a lower funnel shape; A partition wall 41 extending downwardly from the center of the upper wall in the settling tank 49 and extending up to block the upper wall; A filter medium 43 partially installed at a lower end of the partition 41; A discharge pipe (45) installed to discharge the filtered liquid passing through the filter medium (43) on the outer wall of the settling tank (49) at the top of the filter medium (43); A third recovery pipe 127 is installed on the outer wall of the settling tank 49 at the bottom of the filter medium 43 to recover the liquid before being filtered including the microorganisms to the microbial culture tank 70; An opening and closing device 48 integrally installed at a lower end of the settling tank 49; And Livestock manure purification system using a microorganism comprising a; decompression device (50) installed connected to the lower end of the opening and closing device (43). The method of claim 4, wherein The compression dewatering device 50 has an outer tube 51 and a porous wire mesh for separating solid content and liquid therein, the liquid passing through the wire mesh in the lower portion of the outer tube 51; Collecting liquid reservoir 200 is formed integrally, characterized in that it comprises a liquid recovery line 210 for transferring the liquid collected from the liquid reservoir 200 to the raw manure storage tank 10 Livestock manure purification system using microorganisms.

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