KR100383731B1 - Method and system for the compositing and biological treatment of wastewater - Google Patents

Abstract

The present invention relates to a method and apparatus for treating organic wastewater containing a large amount of organic solids, such as livestock wastewater or food waste, and more particularly, by using a porous organic material layer made of sawdust or rice husk, Adsorbed and separated, the solids adsorbed on the porous organic material layer is composted by fermentation and decomposition by aerobic microorganisms, and the filtered wastewater passed through the porous organic material layer is decomposed by aerobic microorganisms in a wastewater treatment tank to waste one wastewater. At the same time, in the treatment facility, composting and wastewater treatment are carried out simultaneously to minimize the use of moisture control agents such as sawdust and rice hulls, and to reduce the amount of chemicals such as flocculants and the amount of organic solids containing large amounts of organic solids. It is about.

In the present invention, in treating organic wastewater containing a large amount of organic solids, the organic wastewater is sprayed onto the porous organic material layer filled in the composting tank to adsorb the organic solids and a part of the wastewater, and the remaining wastewater is filtered to the lower wastewater treatment tank. A filtration step of discharging; Composting step of composting the organic solids adsorbed on the porous organic layer using aerobic microorganisms; It characterized in that it comprises a wastewater treatment step of purifying the filtered wastewater passing through the porous organic layer using aerobic microorganisms.

At this time, the porous organic material layer is characterized in that the porosity and permeability coefficient is large and the specific surface area is made of a material such as sawdust, rice husk and waste grains having a large moisture retention.

On the other hand, the apparatus according to the present invention for treating wastewater containing a large amount of organic solids is a reaction chamber having a constant size, and formed in the bottom of the reaction chamber to distribute the air supplied from the bottom and the filtered wastewater discharged from the top A composting reaction tank comprising a plurality of through holes, a gravel layer formed on the bottom of the reaction chamber in which the through holes are formed, a mat layer disposed on the gravel layer, and a porous organic material layer filled on the mat layer at a predetermined height; An aeration tank for storing the filtered wastewater discharged through the porous organic material layer of the composting tank, a contact media filled in the aeration tank, an air supply means installed to supply air to the lower portion of the contact media, and the aeration tank Characterized in that it comprises a wastewater treatment tank comprising a water level control means for maintaining a constant water level.

Description

Method and apparatus for treating organic wastewater containing a large amount of organic solids {Method and system for the compositing and biological treatment of wastewater}

The present invention relates to a method and apparatus for treating organic wastewater containing a large amount of organic solids, such as livestock wastewater or food waste, and more particularly, by using a porous organic material layer made of sawdust or rice husk, Adsorbed and separated, the solids adsorbed on the porous organic material layer is composted by fermentation and decomposition by aerobic microorganisms, and the filtered wastewater passed through the porous organic material layer is decomposed by aerobic microorganisms in a wastewater treatment tank to waste one wastewater. At the same time, in the treatment facility, composting and wastewater treatment are carried out simultaneously to minimize the use of water absorbents such as sawdust or rice hull, and to reduce the amount of chemicals such as flocculants and the amount of organic solids containing large amounts of organic solids. It is about.

In general, when organic wastewater containing a large amount of organic solids is supplied to a biological treatment facility as it is, the organic solids are incinerated or incinerated by solid-liquid separation in a pretreatment step because the load on a subsequent process including a microorganism active reactor is large. . Recently, however, composting has been recognized as more desirable in terms of the difficulty of securing incinerators and landfills and recycling of waste.

This composting is to decompose monosaccharides, proteins, fats, etc. contained in organic solids using microorganisms to remove odor-causing substances and to evaporate the moisture contained in the waste by the heat of reaction and to kill pathogenic microorganisms and convert them into stable substances. to be. By putting composted organic fertilizer into farmland, it is possible to restore the intelligence and reduce the use of chemical fertilizers.

On the other hand, composting methods include anaerobic treatment methods and aerobic treatment methods. Anaerobic treatment methods accumulate organic waste and decompose and stabilize organic substances mainly by anaerobic bacteria, without actively contacting the air, and aerobic treatment methods. In order to decompose and stabilize organic components by mechanically inverting or forced ventilation, the oxygen concentration of organic waste is maintained at a certain level or more, and the activity of aerobic bacteria is active. However, most compostings use aerobic treatments that have a high treatment speed and low odor.

In this aerobic composting method, it is very important to maintain the proper growth of aerobic microorganisms and appropriate environmental conditions, such as temperature, moisture, pH, and C / N ratio. For example, the growth of aerobic microorganisms requires a certain amount of oxygen and moisture, so that about 50 to 60% of water content and sufficient oxygen supply are required for composting livestock manure or kitchen waste.

To this end, the composting according to the prior art used a moisture control agent such as sawdust or chaff or waste grains to control the moisture content suitable for composting. In particular, since the conventional composting is a discharge-free treatment that does not discharge the effluent, a large amount of moisture control agent is added to absorb all the moisture contained in the livestock waste or food waste. However, these moisture control agents were difficult to purchase and expensive, so they could be used only in small-scale treatment plants and were not applied due to excessive costs in large-scale organic waste treatment plants.

In addition, in order to reduce the amount of the moisture control agent, it is necessary to dehydrate livestock waste or food waste prior to composting to lower the water content. This requires a separate dewatering facility and a large amount of flocculant is used. Since a large amount of organic material is contained, there is a problem that a wastewater treatment facility must be equipped to treat it. Therefore, the wastewater treatment facility according to the prior art requires a variety of treatment facilities to increase the use of power, the land area is wide, there was a problem that a large amount of chemicals used in the flocculation and dehydration process.

Accordingly, the present inventors, in treating organic wastewater containing a large amount of organic solids, without dewatering the organic wastewater in a separate dehydration apparatus or using a large amount of moisture control agent to absorb all the moisture contained in the organic solids. In the Doha treatment facility, organic solids contained in organic wastewater are separated and composted, and the wastewater is biologically treated and used as a liquid fertilizer, or a post-treatment method for discharging organic wastewater has been developed.

The present invention has been made to solve the problems of the prior art as described above, the main object of the present invention in the treatment of organic wastewater containing a large amount of organic solids, dehydrated organic wastewater of a predetermined thickness porous organic material By filtering the bed, organic solids contained in the wastewater are adsorbed to the porous organic material layer to improve the water quality of the filtered wastewater and to treat the large amount of organic solids contained in the organic wastewater by composting the porous oil retained with the organic solids. To provide a way.

It is another object of the present invention to separate organic solids from wastewater by filtering organic wastewater containing a large amount of organic solids into a porous organic material having a predetermined thickness, and the filtered wastewater is treated by aerobic microorganisms to treat a large amount of organic solids. It is to provide a method for efficiently treating organic wastewater containing.

Another object of the present invention is to provide a composting tank for composting organic solids contained in organic wastewater in the upper layer and a wastewater treatment tank for purifying the filtered wastewater generated in the composting tank in the lower layer. The present invention provides an apparatus for treating organic wastewater containing a large amount of organic solids which simultaneously undergoes composting and wastewater purification.

In addition, the present invention by installing an air supply device at the bottom of the wastewater treatment tank and forming a plurality of through-holes between the wastewater treatment tank and the composting reaction tank by supplying the air rising through the wastewater treatment tank to the upper composting reaction tank It is an object of the present invention to provide an apparatus for treating organic wastewater containing a large amount of organic solids, which can efficiently use and warm the air supplied to the composting reaction tank, thereby keeping the composting reaction stable even in winter.

1 is a partially cut perspective view showing an apparatus for treating organic wastewater containing a large amount of organic solids according to the present invention;

2 is a partially cut perspective view showing another embodiment of an apparatus for treating organic wastewater containing a large amount of organic solids according to the present invention;

3 is a longitudinal sectional view showing an apparatus for treating organic wastewater containing a large amount of organic solids according to the present invention;

4 is a longitudinal sectional view showing an apparatus for treating organic wastewater containing a large amount of organic solids according to the present invention;

5 to 7 are plan views showing an apparatus for treating organic wastewater containing a large amount of organic solids according to the present invention,

8 is a schematic flowchart showing a method for treating organic wastewater containing a large amount of organic solids according to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

10: composting reactor 20: reaction chamber

35 through hole 40 porous organic material layer

43: mat layer 45: gravel layer

60: feeder 63; Spreading device

65: stirring device 67: water tank

100: wastewater treatment tank 200: aeration tank

300: air supply means 330; Perforated tube

350: air supply pipe 370: blower

500: contact medium 700: filtrate storage tank

In order to achieve the above object, the present invention, in treating organic wastewater containing a large amount of organic solids, by spraying the organic wastewater to the porous organic material layer filled in the composting tank to adsorb a portion of the organic solids and wastewater and the remaining wastewater The filtration step of filtration and discharged to the lower wastewater treatment tank; Composting step of composting the organic solids adsorbed on the porous organic material layer using aerobic microorganisms; It characterized in that it comprises a wastewater treatment step of purifying the filtered wastewater passing through the porous organic layer using aerobic microorganisms.

At this time, the porous organic material layer is characterized in that the porosity and permeability coefficient is large and the specific surface area is made of a material such as sawdust, rice husk and waste grains having a large moisture retention.

The composting step includes the spraying step of spraying the organic wastewater containing a large amount of organic solids to the porous organic material layer; A stirring step of stirring and mixing the organic solid material and the porous organic material layer in which the waste water is adsorbed; It comprises an air injection step of injecting air to the lower portion of the porous organic material layer.

The present invention is also characterized in that composting the porous organic material layer dried through the composting step to compost a large amount of organic solid material using a minimum of the porous organic material by repeatedly performing the spraying step, the stirring step and the air injection step. do.

The wastewater treatment step includes a transfer step of transferring the wastewater filtered by the porous organic material layer to a lower aeration tank, an aeration step of injecting air into the wastewater stored in the aeration tank, and maintaining a constant water level in the aeration tank. Characterized in that it comprises a water level control step of controlling to form a space on top of.

In addition, the wastewater treatment step is characterized in that it further comprises a filter medium contact step of filling the contact medium in the aeration tank to contact.

On the other hand, the organic wastewater treatment apparatus including a large amount of organic solids according to the present invention is a reactor having a constant size, and a plurality of through-holes formed in the bottom of the reaction tank for circulating air and filtered filtration wastewater up and down, and A composting reaction tank comprising a gravel layer formed on the bottom of the reaction vessel in which the through hole is formed, a mat layer installed on the gravel layer, and a porous organic material layer filled on the mat layer at a predetermined height; An aeration tank formed at the bottom of the composting reaction tank to store the filtered wastewater discharged through the porous organic material layer filled in the composting reaction tank, an air supply means installed to supply air to the aeration tank, and a constant level of the aeration tank Characterized in that it comprises a wastewater treatment tank comprising a level control means for maintaining.

And, the aeration tank according to the invention is characterized in that the filling of the contact medium.

In addition, the wastewater treatment apparatus including a large amount of organic solids according to the present invention is a collection tank for temporarily storing the organic wastewater formed on one side of the composting reaction tank, and the filtrate storage tank for temporarily storing the surplus wastewater formed on one side of the wastewater treatment tank It is characterized by more installed.

In addition, the upper part of the composting reaction tank is horizontally moved along the composting reaction tank, characterized in that the waste water spreading device for spraying organic wastewater, and a stirring device for stirring the porous organic material layer is installed.

On the other hand, the air injection means installed in the wastewater treatment tank is a plurality of porous pipes disposed on the bottom of the aeration tank, an air supply pipe for communicating the air by communicating the plurality of porous pipes, and installed on one side of the air supply pipe to blow air Characterized in that it comprises a blower.

Another embodiment of a wastewater treatment apparatus containing a large amount of organic solids according to the present invention is a reactor having a constant size, the air supply means installed on the bottom of the reactor, and the gravel layer filled at a predetermined height in the lower portion of the reactor And a mat layer provided on the gravel layer, a porous organic material layer formed at a predetermined height on the mat layer, and a level of the gravel layer is kept constant to form an air layer on top of the gravel layer. Comprising the water level control means characterized in that composting occurs in the porous organic material layer and the wastewater by using aerobic microorganisms in the lower portion of the gravel layer.

Hereinafter, with reference to the accompanying drawings looks at in detail an embodiment of an apparatus for treating organic wastewater containing a large amount of organic solids according to the present invention.

1 is a schematic partial cutaway perspective view showing a treatment apparatus 1 for treating organic wastewater comprising a large amount of organic solids according to the present invention. As shown in the figure, the organic wastewater treatment apparatus 1 has a composting reaction tank 10 formed in an upper layer and a wastewater treatment tank 100 formed in a lower layer, thereby forming a two-layer structure as a whole. In addition, the composting reaction vessel 10 and the wastewater treatment tank 100 are partitioned through the bottom of the composting reaction vessel 10 in which a plurality of through holes 35 are formed.

First, the composting reaction tank 10 has a reaction chamber 20 having a predetermined shape and size, a plurality of through holes 35 formed at the bottom of the reaction chamber and communicating with the wastewater treatment tank 100 in the lower layer, It is composed of a plurality of porous layers 50 stacked in the reaction chamber 20. The porous layer 50 is composed of a porous organic material layer 40, a mat layer 43 and a gravel layer 45 from above. The gravel layer 45 disperses the air supplied from the bottom through the through hole 35 formed in the bottom of the reaction chamber to be distributed to the front of the reaction chamber 20 and forms a biofilm on the surface to purify the wastewater. The mat layer 43 prevents the organic material positioned thereon from entering the gravel layer 45 and blocking the pores of the gravel layer 45.

The organic material layer 40 is composed of organic materials having a high porosity and a permeability coefficient and high specific surface area so as to adsorb a portion of the organic solids and the wastewater contained in the sprayed organic wastewater and to discharge the remaining wastewater. For example, the organic material layer 40 is made of an organic material having a porosity of 50% or more, a permeability coefficient of 1.0 × 10 ⁻³ cm / sec or more, a specific surface area of 35 m 2 / g or more, and more preferably sawdust. It is composed of organic materials with excellent water absorption ability such as rice husks and waste grains.

On the other hand, the upper part of the composting reaction tank 10 is provided with a conveying device 60 to move horizontally along the reaction tank, the conveying device 60 and the spraying device 63 for spraying organic wastewater and the porous organic material A stirring device 65 is provided for stirring the layer 40. Therefore, the transfer device 60 sprays the organic wastewater along the composting reaction tank 10 to the left and right, and at the same time, while stirring the porous organic material layer to uniformly adsorb the solid organic matter and the wastewater. At this time, the sprinkling apparatus 63 pumps and sprays organic wastewater from the collection tank 67 formed on one side of the composting reaction tank 10.

Accordingly, the porous organic material layer 40 adsorbs a part of the organic solids and the wastewater contained in the sprayed organic wastewater and filters most of the wastewater to form a plurality of through holes 35 formed at the bottom of the composting tank 10. Through the wastewater treatment tank 100 of the lower layer through.

Subsequently, as shown in FIG. 1, the wastewater treatment tank 100 includes an aeration tank 200 having a predetermined shape and size, and an air supply device 300 installed below the aeration tank 200. In addition, the aeration tank 200 may be preferably filled with the contact medium 500, but the contact medium 500 may be omitted depending on the type of wastewater. And the air supply device 300 is a plurality of porous pipes 330 disposed on the bottom surface of the aeration tank 200, the air supply pipe 350 for transferring the air by communicating the plurality of porous pipes 330, and It is configured to include a blower 370 installed on one side of the air supply pipe 350 to blow air. On the other hand, one side of the aeration tank 200 is provided with a water level control device (not shown) for adjusting the water level of the waste water. And one side of the wastewater treatment tank 100 is formed with a discharge port (not shown) for discharging excess wastewater or purified wastewater, the excess wastewater discharged through the discharge port is the wastewater treatment tank 100 It is stored in the filtrate storage tank 700 formed separately on one side of the.

Therefore, the wastewater treatment tank 100 maintains an aerobic state by oxygen supplied by the air supply device 350, so that the growth of aerobic microorganisms is active, and an aerobic microbial membrane is formed on the surface of the contact medium 500. . Therefore, the organic material contained in the filtered wastewater introduced into the wastewater treatment tank 100 is decomposed and purified by the aerobic microorganisms attached to the contact medium 500. At this time, a part of the air supplied through the air supply device 350 is used by the aerobic microorganism and the rest is raised through the through hole 35 formed in the bottom of the composting reaction tank 10 to the porous organic material layer 40. Will be supplied.

Then, the porous organic material layer 40 maintains an aerobic state, thereby promoting the growth of aerobic microorganisms, and the organic solids adsorbed on the organic material layer 40 are decomposed by the aerobic microorganisms and converted into stable inorganic materials. .

On the other hand, in order for the aerobic microorganism to grow on the porous organic material layer 40, not only moisture and oxygen should be supplied but also maintain an appropriate temperature range. For example, when the internal temperature of the porous organic material layer 40 is raised to 55 ° C. or higher, not only pathogens but also aerobic microorganisms may be killed so as not to rise above the temperature.

As such, in order to control the temperature of the porous organic material layer 40, the amount of air supplied to the organic material layer 40 is adjusted or the organic material layer 40 is appropriately stirred. Air is supplied to enable aerobic metabolism of microorganisms and to control the temperature, as well as to remove water and gases such as carbon dioxide. For example, the initial temperature riser supplies a large amount of air to activate microorganisms at a high rate, but when entering a high temperature stage, the amount of air depends on the temperature detected from a temperature sensor (not shown) installed in the organic material layer 40. Adjust it properly.

2 is a schematic partial cutaway perspective view showing another embodiment of a treatment apparatus for treating a large amount of organic solids according to the present invention. As shown in the figure, the organic wastewater treatment apparatus 1 has a porous organic material layer 40 formed on the upper layer, a gravel layer 45 formed on the lower layer, and the porous organic material layer 40 and the gravel layer A mat layer 43 is provided between the 45s to prevent organic substances from flowing out to the bottom.

Therefore, a part of the organic solids and wastewater contained in the organic wastewater sprayed on the porous organic material layer 40 is adsorbed to the organic material layer 40 and the remaining waste water filtered is the mat layer 43 and the gravel layer 45. Is passed through). Meanwhile, the gravel layer 45 maintains a constant water level by the level control means, so that the air layer 70 is formed on the top.

Therefore, a porous organic material layer 40 is formed around the air layer 70 to form a composting reaction tank 10 where composting occurs, and filtration wastewater is stored at the bottom of the air layer 70 and supplied from the bottom. It becomes the wastewater treatment tank 100 aerated by the oxygen to become.

That is, the wastewater treatment tank 100 maintains an aerobic state by oxygen supplied by the air supply device 300, so that the growth of aerobic microorganisms is active, and an aerobic microbial membrane is formed on the surface of the gravel. Therefore, the organic material contained in the filtered wastewater introduced into the wastewater treatment tank 100 is decomposed and purified by an aerobic microorganism attached to the gravel. At this time, a part of the air supplied through the air supply device 300 is used by the aerobic microorganism and the rest is raised to the composting reaction tank 10 through the air layer 70 and supplied to the porous organic material layer 40. Will be.

Then, the porous organic material layer 40 maintains an aerobic state, thereby promoting the growth of aerobic microorganisms, and the organic solids adsorbed on the organic material layer 40 are decomposed by the aerobic microorganisms and converted into stable inorganic materials. .

Next, a more specific embodiment of the organic wastewater treatment apparatus containing a large amount of organic solids according to the present invention will be described in detail with reference to the accompanying drawings. First, Figure 3 is a cross-sectional view of the organic wastewater treatment apparatus 1 according to the present invention, as shown in the drawing, the composting reaction tank 10 is formed in the upper portion and the wastewater treatment tank 100 is formed in the lower portion, A collecting tank 67 is formed at one side of the composting reaction tank 10, and a filtrate storage tank 600 is formed at one side of the wastewater treatment tank 100. In addition, the composting reaction tank 10 and the wastewater treatment tank 100 communicate with each other through a plurality of manholes 33 and through holes 35, and a gravel layer 45 and a mat layer at the bottom of the composting reaction tank 10. A 43 is formed and a porous organic material layer 40 is formed on the mat layer 43.

On the other hand, Figure 4 is a longitudinal cross-sectional view of the organic wastewater treatment apparatus 1 according to the present invention, showing a transfer device 60 installed on top of the composting reaction tank (10). As shown in the figure, the spraying device 63 is installed in front of the transfer device 60, the stirring device 65 is installed behind it. Therefore, the transfer device 60 may spray the waste water while moving horizontally along the composting reaction tank 10, and may also stir by operating the stirring device 65, or by operating only the stirring device 65 without spraying the waste water to form a porous organic material. The material layer 40 may be agitated. On the other hand, the wastewater treatment tank 100 is provided with a plurality of support walls 90 for supporting the composting reaction tank (10).

5 to 7 are plan views showing a plan view of the organic wastewater treatment apparatus according to the present invention, and FIG. 5 is a plan view showing the composting reaction tank 10, the sump tank 67, and the transfer device 60. 6 is a plan view showing the bottom of the composting reaction tank 10, a plurality of rectangular menhole 33 and the through hole 35 is formed, and the menhole grating to prevent the gravel, etc. fall out (37) is provided. 7 is a plan sectional view showing the bottom of the wastewater treatment tank 100, the wastewater treatment tank 100 is divided into a plurality of support walls 90, each aeration tank 200, the contact medium 500 and the support Walls 90 are alternately installed, and a porous tube 330 is disposed below the contact medium 500. An air supply pipe 350 is coupled to one end of the plurality of porous pipes 330, and a blower 370 is installed at one side thereof.

Next, a method for treating wastewater containing a large amount of organic solids according to the present invention will be described in detail. 8 is a schematic flowchart showing an organic wastewater treatment process according to the present invention. As shown in the figure, first, wastewater containing a large amount of organic solids, such as livestock manure or food waste, is collected without dehydration and stored in a sump. (ST1)

On the other hand, the composting tank 10 is filled with a porous organic material such as sawdust or rice husk to a predetermined height to form an organic material layer (40). At this time, a plurality of through holes 35 penetrating the mat layer 43, the gravel layer 45, and the lower wastewater treatment tank 100 are formed at the bottom of the composting reaction tank 10.

Then, the organic wastewater stored in the sump 67 is pumped and spread evenly over the organic material layer 40. At this time, the organic materials are stirred together with the spraying of the organic waste water so that the organic solids and the waste water are evenly adsorbed to the organic material. On the other hand, when the organic material layer 40 is stirred, the lower predetermined height, for example, about 50 to 60 cm, is not stirred to protect the filtration function of the wastewater and does not change the growth environment of the microorganisms. Thereby facilitating the activity of microorganisms.

When the organic wastewater is sprayed and stirred as described above, the porous organic material layer 40 adsorbs the organic solids and some of the wastewater contained in the spread organic wastewater, and most of the wastewater is filtered to the bottom of the composting tank 10. It is discharged to the wastewater treatment tank 100 of the lower layer through the plurality of through holes 35 formed. (ST4)

On the other hand, when the composting tank 10 is supplied with sufficient air through the through hole 35 formed in the bottom, the aerobic microorganisms thrive in the organic material layer 40 oxidizes and decomposes the organic solids adsorbed. The decomposition heat is evaporated to generate moisture. When the internal temperature of the organic material layer 40 rises to 55 ° C. or higher or the pores of the organic material layer 40 are blocked and the aerobic state is destroyed, the organic material layer 40 is stirred to lower the internal temperature and oxygen. Supply of the smooth.

When the organic solids and water adsorbed through the composting process are removed, the organic wastewater stored in the sump 67 is sprayed on the organic material layer 40 and the composting process is repeated. At this time, since the organic material layer 40 is dried by the reaction heat generated during the composting process, the adsorption capacity is restored. (ST5)

As described above, the wastewater treatment method according to the present invention can be used as many times as long as the porous organic material is used as a filter agent rather than a moisture control agent as long as it has adsorption capacity. Therefore, not only reduces the input amount of sawdust used as a porous organic material, but also can be used for a long time by one input by repeatedly recycling.

On the other hand, the filtration wastewater filtered by the organic material layer 40 is introduced into the wastewater treatment tank 100 during the composting process. At this time, the wastewater treatment tank 100 maintains an aerobic state by the air supply means 300 installed in the lower portion and the aerobic microorganisms are activated by the contact media 500 filled in the wastewater treatment tank 100, so that the wastewater Organic matter contained inside is decomposed and purified (ST6).

At this time, the wastewater treatment tank 100 preferably maintains a constant water level by the water level control means for the stability of the microbial reaction. That is, since the amount of wastewater in the wastewater treatment tank 100 is increased when the organic wastewater is sprayed, the excess wastewater is discharged and stored in the filtrate storage tank 600 to be used as a liquid ratio or pumped into a separate post-treatment process.

In this case, the water level adjusting means maintains the water level of the aeration tank at a predetermined height, for example, two-thirds of the total height, so that a predetermined space is formed on the aeration tank 200. This space acts as a pneumatic pressure during the drainage of the wastewater to facilitate drainage.

Finally, as described above, the organic material converted into organic fertilizer through the composting step is sprayed on farmland to be used by crops, and the purified water treated after the wastewater treatment step is stored in the filtrate storage tank 600 It is used as or treated as a separate post-treatment process. Meanwhile, the treated water treated according to the present invention has a much lower organic matter concentration than the conventional wastewater treated with a solid-liquid separation facility or a pretreatment facility, and the amount of the wastewater is reduced to 20-50%, thereby significantly reducing the capacity of the post-treatment process. .

The treatment method of organic wastewater containing a large amount of organic solids according to the present invention has the effect of efficiently treating domestic animal wastewater discharged without separating manure and urine.

In addition, the method for treating organic wastewater according to the present invention has the effect of reducing secondary environmental pollution by saving energy and chemicals by physically and chemically treating food waste generated in a kitchen without dehydrating it.

The present invention also has the effect of economically treating organic wastewater by reducing the amount of water absorbent, which is difficult to obtain and expensive, by more than 90%.

And wastewater treatment apparatus containing a large amount of organic solids according to the present invention to minimize the site of the wastewater treatment plant by installing a wastewater treatment tank in the lower part of the composting reaction tank, reuse the remaining air used in the wastewater treatment tank in the lower composting tank Thereby, it is possible to omit the installation of an additional air supply device, thereby supplying the air heated in the wastewater treatment tank to the composting reaction tank, thereby reducing the composting rate due to the temperature decrease.

Claims (12)

In treating organic wastewater containing a large amount of organic solids, A filtration step of spraying the organic wastewater on the porous organic material layer filled in the composting tank to adsorb the organic solids and a part of the wastewater, and filtering the remaining wastewater to discharge the wastewater to the lower wastewater treatment tank; Composting step of composting the organic solids adsorbed on the porous organic material layer using aerobic microorganisms; And a wastewater treatment step of purifying the filtered wastewater having passed through the porous organic material layer using aerobic microorganisms. The organic wastewater containing a large amount of organic solids according to claim 1, wherein the porous organic material layer is made of a material such as sawdust, rice hulls and waste grains having high water retention due to large porosity and permeability coefficient and a large specific surface area. Treatment method. The method of claim 1, wherein the composting step comprises: a sparging step of spraying the organic wastewater containing a large amount of organic solids on the porous organic material layer; A stirring step of stirring and mixing the organic solid material and the porous organic material layer in which the waste water is adsorbed; A method of treating organic wastewater containing a large amount of organic solids, comprising an air injection step of injecting air into the lower portion of the porous organic material layer. According to claim 3, Comprising a large amount of organic solid material using a minimum of the porous organic material by repeatedly spraying, stirring and air injection step to the porous organic material layer dried through the composting step A method for treating organic wastewater containing a large amount of organic solids. The method of claim 1, wherein the wastewater treatment step includes a transfer step of transferring the wastewater filtered by the porous organic material layer to a lower aeration tank, an aeration step of injecting air into the wastewater stored in the aeration tank, and a water level in the aeration tank. A method of treating organic wastewater containing a large amount of organic solids, comprising a level control step of maintaining a constant to control a space to be formed in an upper portion of the aeration tank. The method for treating organic wastewater containing a large amount of organic solids according to claim 5, wherein the wastewater treatment step further comprises a filter contact step of contacting the wastewater with the contact media filled in the aeration tank. In the treatment apparatus for treating wastewater containing a large amount of organic solids, A reaction tank having a constant size, a plurality of through holes formed at the bottom of the reaction tank for circulating air and filtered filtration wastewater up and down, a gravel layer formed on the bottom of the reaction tank in which the through holes are formed, and a mat layer installed on the gravel layer; A composting reaction tank comprising a porous organic material layer filled on the mat layer at a predetermined height; An aeration tank formed in the lower part of the composting reaction tank to store the filtered wastewater discharged through the porous organic material layer filled in the composting reaction tank, an air supply means installed to supply air to the lower part of the aeration tank, and a level of the aeration tank Apparatus for treating organic wastewater containing a large amount of organic solids, characterized in that it comprises a wastewater treatment tank comprising a level control means for maintaining a constant. 8. An apparatus for treating organic wastewater containing a large amount of organic solids according to claim 7, wherein a contact medium is filled in the aeration tank. The organic solids according to claim 7, further comprising: a collecting tank formed at one side of the composting tank to temporarily store the organic wastewater, and a filtrate storage tank formed at one side of the wastewater treatment tank to temporarily store excess wastewater. An apparatus for treating organic wastewater containing a. According to claim 7, The upper part of the composting reaction tank is moved horizontally along the composting reaction tank waste water spreading device for spraying organic wastewater, and a large amount of organic solids, characterized in that the stirring device for stirring the porous organic material layer is installed An apparatus for treating organic wastewater containing a. According to claim 7, The air injection means installed in the wastewater treatment tank is a plurality of porous pipes disposed on the bottom of the aeration tank, the air supply pipe for communicating the air by communicating the plurality of porous pipes, and is provided on one side of the air supply pipe An apparatus for treating organic wastewater containing a large amount of organic solids, comprising a blower for blowing air. In the treatment apparatus of organic wastewater containing a large amount of organic solids, A reactor having a constant size, Air supply means installed on the bottom of the reaction tank, A gravel layer filled to a predetermined height in a lower portion of the reactor, A mat layer installed on top of the gravel layer, A porous organic material layer formed at a predetermined height on top of the mat layer; The water level control means for maintaining a constant level of the gravel layer to form an air layer on the top of the gravel layer is composed of composting occurs in the porous organic material layer and waste water using aerobic microorganisms in the lower portion of the gravel layer Treatment apparatus for organic wastewater containing a large amount of organic solids, characterized in that for treating.