KR100602151B1 - Ds-gl ts - Google Patents

Abstract

The present invention is to treat the inflow of food leachate, the flow control tank for adjusting the food leachate flow rate, the anaerobic treatment for the anaerobic treatment by anaerobic microorganisms, the pressure flotation tank for the separation of solid-liquid separation by chemical treatment, to remove nitrogen by denitrification reaction To treat anoxic tanks, biofilm tanks that decompose organic matter by microorganisms using bioblock carriers, precipitation tanks to remove sludge and settle the supernatant through sedimentation, and MBR tanks for filtration by separation membranes, and to treat hardly decomposable substances. The present invention relates to a food leachate treatment system discharged through an ozone oxidation tank and a discharge tank for discharging the treated water to the outside. Such a water treatment system has a high load compared to the concentration of livestock wastewater and includes a large amount of salt. It makes up for the drawback that water treatment is difficult with conventional biological treatment processes. Efficiently by water treatment, it is possible to prevent the soil contaminated by the leachate produced by the conventional food waste treatment, pollution of underground water streams and has the effect of contributing to environmental pollution.

Food, leachate, flow control tank, anaerobic tank, anoxic tank, ozone oxidation tank, filtration tank, sedimentation tank, organic matter

Description

Food Leachate Treatment System Using Bioblock Carrier {DS-GL TS}

1 is a step showing the food leachate treatment process according to the present invention.

2 is a schematic view showing a food leachate system according to the present invention

Figure 3 is a schematic diagram showing the pressure injured relief according to the present invention.

4 is a schematic view showing a bioblock carrier of a biofilm according to the present invention.

5 is a cross-sectional view showing an MBR tank according to the present invention.

Explanation of the main symbols in the drawings

1: flow rate adjusting tank 2: anaerobic tank 3: pressurized flotation tank

4: anoxic tank 5: biofilm tank 6: settling tank

7: MBR tank 8: ozone oxidation tank 9: filtration tank

10: discharge tank

The present invention is to treat the inflow of food leachate, the flow control tank for adjusting the food leachate flow rate, the anaerobic treatment for the anaerobic treatment by anaerobic microorganisms, the pressure flotation tank for the separation of solid-liquid separation by chemical treatment, to remove nitrogen by denitrification reaction To treat anoxic tanks, biofilm tanks that decompose organic matter by microorganisms using bioblock carriers, precipitation tanks to remove sludge and settle the supernatant through sedimentation, and MBR tanks for filtration by separation membranes, and to treat hardly decomposable substances. It relates to a food leachate treatment system discharged through an ozone oxidation tank and a discharge tank for discharging the treated water to the outside,

Conventionally, the disposal of food waste is mostly in the form of landfill, and the problem of treatment of various odors, gases and leachate generated by landfill of such food waste has emerged.

Such odors and gases cause air pollution, deteriorate residential environmental conditions, and thus cannot maintain a comfortable life. Also, many problems, such as groundwater contamination, are caused by leachate. A leachate treatment system has been proposed.

However, the conventional system has a problem that it is difficult to treat the food waste leachate containing a large amount of salt, which has a load higher than the livestock wastewater concentration mainly by taking a biological process.

In order to solve the above problems, in the present invention, by treating the food leachate through the flow control tank, anaerobic tank, pressurized flotation tank, anoxic tank, biofilm tank, sedimentation tank, MBR tank, ozone oxidation tank, discharge tank, soil pollution, groundwater pollution It is an object of the present invention to provide a food leachate treatment system that can prevent the back.

In order to achieve the above object, in the present invention, the introduced food leachate flow rate adjusting tank (1) for adjusting the flow rate, and

Anaerobic tank (2) for anaerobic treatment of food leachate introduced from the flow rate adjustment tank (1) by anaerobic microorganisms,

Pressurized flotation tank (3) in which solid-liquid separation occurs through a static mixer (300) for mixing the anaerobic food leachate in the anaerobic tank (2) with the water treatment chemical provided in the chemical tank (301),

An anoxic tank (4) for removing nitrogen by denitrification of the leachate chemically treated in the pressurized flotation tank (3),

A biofilm tank 5 for decomposing organic matters using a bioblock carrier to remove leachate from which nitrogen has been removed from the anoxic tank 4;

A sedimentation tank 6 for removing sludge and discharging the supernatant of the leachate treated with organic materials by microorganisms in the biofilm tank 5;

MBR tank (7) for filtering the leachate introduced from the settling tank 6 by the separation membrane,

Ozone oxidation tank (8) for treating the hardly decomposable substance of the leachate water treated by the membrane in the MBR tank (7),

A filtration tank 9 for final treatment of the leachate treated by ozone in the ozone oxidation tank 8 with an activated carbon filter;

Consists of a discharge tank (10) for discharging the treated water finally treated in the filtration tank (9) and discharged to the outside after the sterilization treatment,

The static mixer 300 has three roles of plane splitting, reorientation, and mixing, when the elements fixed by twisting 180 ° in the left and right directions in the pipe are connected at 90 °, respectively, and are transported through the fluid. The main component is a food leachate treatment system using a bioblock carrier configured to mix two or more liquids, gases, and powders simultaneously.

The flow rate adjustment tank may be provided with the immersion tank and the screen tank to the previous stage, if necessary. In the case of the screen tank, it is installed and used when there are a large number of solids in the leachate, and the bottom of the flow regulating tank is provided with an diffuser, so that the aeration state and the amount of the leachate in the flow regulating tank are kept constant.

The anaerobic tank anaerobicly treats food leachate transferred through a flow adjusting tank by anaerobic microorganisms. The anaerobic microorganisms include Veillonella, Veidaella coccus, Acaminoaminoccus, Megasphaera, Propionibacterium, Eubacterium, Bifidobacterium, Bifidobacterium Organic matter is used as a nutrient by anaerobic microorganisms consisting of one or a mixture of two or more selected from Bacteroides, Fusobacterium, Neptotrichia, and Clostridium. Will release phosphorus. The treatment by anaerobic microorganisms as described above has the advantage that the microorganisms can be decomposed of the organic microorganisms even without a special device because the microorganisms use the organic microorganisms contained in the leachate as a nutrient source.

The pressurized floatation tank is a place where an anaerobic leachate treated by anaerobic microorganisms in an anaerobic tank is treated with water treatment chemicals, and may treat up to a source of injuries that are not injured.

The anoxic tank is a place for removing nitrogen by a denitrification reaction in which nitrogen nitrate (NO ₃ ⁻ ) contained in the leachate treated by the water treatment chemical in a pressurized flotation tank is nitrogen gas (gas, N ₂ ) under anoxic conditions. The reaction mechanism is as follows.

^{_{2NO 3 - + 2 (H 2}} ) → 2NO 2 - + 2H 2 O

^{_{2NO 2 - + 3 (H 2}} ) → N 2 ↑ + 2OH - + 2H 2 O

The biofilm tank is a place where the organic matter is decomposed by the microorganisms using the bioblock carrier to the leachate treated in the anoxic tank, and the bioblock carrier is configured to facilitate the growth of the microorganisms, thereby improving treatment efficiency.

The settling tank removes sludge generated by sedimentation of the leachate treated in the biofilm tank by consolidation.

The MBR tank is used to treat the supernatant water from which the sludge is removed by sedimentation by consolidation in the sedimentation tank using a separation membrane. The MBR tank is configured to increase the treatment efficiency of the separation membrane by an acid pipe configured under the MBR tank.

The ozone oxidation tank is a place for treating hardly decomposable substances by bringing ozone into contact with leachate treated through the MBR tank.

In this way, the leachate treated in the ozone oxidation tank is finally transferred to the discharge tank through the filtration tank. The filtration tank is where the leachate is finally treated through the activated carbon filter, and the treated water is transferred to the discharge tank and discharged to the outside.

Hereinafter, the above configuration will be described in more detail with reference to the accompanying drawings.

1 is a step diagram illustrating a food leachate treatment process according to the present invention, Figure 2 is a schematic view showing a food leachate system according to the present invention, Figure 3 is a pressurized in accordance with the present invention Figure 4 is a schematic view showing a tank, Figure 4 is a schematic view showing a bioblock carrier of a biofilm tank according to the present invention, Figure 5 is a cross-sectional view showing an MBR tank according to the present invention.

As shown in FIG. 1 or FIG. 2, the food leachate treatment system according to the present invention includes a flow rate adjusting tank 1, an anaerobic tank 2, a pressurized flotation tank 3, an anoxic tank 4, and a biofilm. The tank 5, the settling tank 6, the MBR tank 7, the ozone oxidation tank 8, the filtration tank 9, and the discharge tank 10 are comprised.

At this time, some of the treated water passed through the filtration tank (9) is re-transmitted to the anaerobic tank (2) through the return pipe is subjected to the reprocessing process.

The flow rate adjusting tank 1 collects the food leachate introduced through the pipe and maintains an aeration state by an diffuser installed at the bottom of the flow rate adjusting tank 1.

In addition, to prevent the overload to maintain a constant flow rate, a certain amount is transferred to the anaerobic tank (2).

The anaerobic tank (2) is a place for releasing phosphorus by using organic substances as a nutrient source, the anaerobic microorganisms included here are Veillonella, Veidaella, Acidaaminococcus, Megasphaera, Propionib. Among Propionibacterium, Eubacterium, Bifidobacterium, Bacteroides, Fusobacacterium, Leptotrichia, Clostridium Any one or two or more kinds selected are used.

In this anaerobic tank (2), phosphorus release by microorganisms occurs, and organic matter is stored in the form of polyhydroxybutylate (PHB) by anaerobic microorganisms, and phosphorus is produced using energy generated by hydrolysis of polyphosphate. Is released. That is, anaerobic microorganisms release phosphorus stored in the body using organic matter as an energy source.

The pressurized floatation tank (3) is a chemical treatment of the harmful substances contained in the food leachate by water treatment chemicals, as shown in Figure 3, sodium hydroxide solution, aluminum sulfate solution provided in the chemical tank 301 Any one or two selected from these are transferred to the static mixer 300 and mixed with the leachate, and the leachate mixed with the water treatment chemicals passed through the static mixer is temporarily stored in the pressure tank 302 by a pressure pump. Make contact with the pressurized air. This contacting process requires an excess of air to dissolve in the waste water to achieve the desired flotation effect.

Waste water mixed with the water treatment chemical in the static mixer 300 is introduced into the pressurization tank 3 through the injection device 31.

The static mixer 300 is also referred to as a line mixer, and the fixed elements twisted 180 ° in the left and right directions in the pipe are connected to 90 °, respectively, and are continuously divided, changed in direction, and shuffled when the fluid is passed through. It is a device that mixes two or more liquids, gases and powders through three roles.

The leachate mixed with the water treatment chemical in the static mixer 300 is introduced into the pressure flotation tank 3 through the injection device 31, and the injection device 31 is to spray high-pressure air together with water. It is located in the lower part of the pressure injured tank 3.

The pressurized floatation tank (3) is equipped with a sludge scraper to continuously sweep the scum. The kicked scum is transferred to a sludge reservoir.

The anoxic tank 4 is a process in which a denitrifying microorganism (denitrifier) is converted to nitrogen gas by using an organic material, and the nitrate nitrogen returned from the aerobic biofilm tank 5 is nitrate nitrogen (NO ₃ ⁻ ). , N ₂ ) to remove nitrogen by denitrification. In this way, the leachate from which nitrogen has been removed by the denitrification reaction is transferred to the aerobic biofilm tank 5.

As shown in FIG. 4, the biofilm tank 5 facilitates adhesion of microorganisms using the bioblock carrier 50 to oxidize, nitrify, and phosphorus intake of organic matter. The bottom of the biofilm tank 5 is provided with an diffuser to supply oxygen to the aerobic biofilm tank 5. A blower is provided externally to supply oxygen to the aerobic biofilm tank 5.

The bioblock carrier 50 is manufactured by discharging a polymer formed by heating and melting a high density polyethylene resin having a density of 0.9 to 0.95 by an electric heater at 120 to 150 ° C. In addition, the inner and outer circumferential surface of the cylindrical bioblock carrier formed in the pleated jaw portion 51 is formed to facilitate the growth of microorganisms. In order to prepare a bioblock carrier, polyethylene uses a high density in the range of 0.9 to 0.95, so that it is excellent in durability, such as tensile strength, when it is made of a carrier, and when the polyethylene resin is heated and discharged, the heating temperature may be 120 ° C. or less or 150 ° C. In this case, it is preferable to form a polymer by heating and melting in the range of 120 to 150 ° C. because a problem occurs that the discharge is not well achieved.

Some of the leachate having passed through the biofilm tank 5 is returned to the anoxic tank 4 and the rest is transferred to the settling tank 6.

The sedimentation tank 6 causes sedimentation by consolidating the leachate, and the sludge produced by such sedimentation is discharged to the outside. The consolidation refers to the precipitation of particles in a high concentration of suspended solids caused only by consolidation because the concentration of the particles is so large that the particles form a structure. Consolidation occurs because of the weight of particles continuously applied to the structure by precipitation from the liquid above it.

Part of the settling tank (6) is returned to the anaerobic tank (2) through the return pipe to repeat the water treatment process from the anaerobic tank (2) again.

The MBR tank (7) is a place where the supernatant water treated in the settling tank (6) is treated with a separation membrane, and the separation membrane forms a vortex by installing an acid pipe at the bottom thereof to efficiently form a cake layer formed on the membrane. It is configured to remove, as shown in Figure 5, by forming a screen 73 of the mesh structure at regular intervals spaced apart from the outer periphery of the separation membrane to treat the large foreign matter primarily to reduce the treatment efficiency of the separation membrane The diffuser 70 is an injection pipe 72 having a diameter of 0.1 to 3 mm, and an angle formed between the injection pipe 72 and the acid cylinder 71 has a θ value of 35 to 85 °. The film is formed while forming an acute angle with the acid cylinder to shoot strong air, thereby inducing turbulence inside the MBR tank 7, and rising air induces a collision with the screen 73 to cause membrane fouling generated in the immersion type membrane module 74. Efficiently It has a configuration that can be removed. When the θ angle is 35 ° or less, the strength of the air blown through the membrane module is very small, so that it is difficult to efficiently remove the cake layer, and when it is above 85 °, it is difficult to form the vortex and the turbulence, so it is 35 to 85 °. It is desirable to air at an angle of.

The ozone oxidation tank 8 is a place for removing hardly decomposable substances contained in leachate using ozone, and uses ozone introduced from an ozone generator. Ozone exists in the form of three oxygen atoms combined in a four-shaped resonance structure, and the OH radicals generated when ozone decomposes have strong oxidizing power, oxidize pollutant organic substances, and react with heavy metals to change into harmless compounds. Having such a property, such ozone can be highly treated as a microbial post-treatment such as decolorization of dyeing wastewater, low molecular weight of high molecular compound, COD, BOD reduction and the like.

The filtration tank 9 is a place where the leachate finally transported after the hardly decomposable substance is treated in the ozone treatment tank 8 is treated with leachate using an A / C filter. The A / C filter is a filter installed inside the filtration tank (9), 20 to 40% by weight of the vermiculite after the calcining reaction at 600 ~ 1,000 ℃ and 30 to 50% by weight of the perlite after the calcining reaction at 1,100 ℃ and activated carbon 10 It is formed by mixing 15% by weight.

In this way, the leachate having passed through the filtration tank 9 is finally transferred to the discharge tank 10 to disinfect and then discharge the treated water to the outside.

Hereinafter, looking at the food leachate treatment process of the food leachate treatment system using a bioblock carrier according to the above configuration,

As shown in Figure 1, the first leachate is introduced into the flow rate adjusting tank (1) is aerated by the diffuser and transported to the anaerobic tank (2) (S10).

Subsequently, the leachate transferred to the anaerobic tank 2 is freed of organic matter by anaerobic microorganisms using organic matter in the leachate as an energy source.

The leachate treated by the anaerobic microorganisms is mixed in the static mixer 300 together with the water treatment chemical supplied from the chemical tank 301, and the mixed leachate is brought into contact with the air supplied from the pressurized tank 302 while injecting device. It is transferred into the pressure injured tank 3 through the 31 (S20).

Subsequently, the leachate transported to the pressure flotation tank 3 is chemically treated by the water treatment chemicals in the food leachate through a static mixer and then transferred to the anoxic tank 4 (S30).

Subsequently, nitrogen is removed from the leachate transferred to the oxygen-free tank 4 by the denitrification reaction, and the nitrogen-leached leachate is again introduced into the biofilm tank 5 (S40).

Subsequently, the leachate flowing into the biofilm tank 5 removes the oxidation, nitrification and phosphorus generation of organic matter by the aerobic microorganism attached to the bioblock carrier 50, and the organic matter oxidation, nitrification and phosphorus removal are performed. Leachate is transferred to the settling tank 6 (S50).

Subsequently, the leachate transferred to the sedimentation tank 6 causes sedimentation by consolidation, and the sludge produced by the sedimentation is discharged to the outside to remove the sludge, and the supernatant of the leachate from which the sludge has been removed is transferred to the MBR tank 7. It becomes (S60).

Subsequently, the leachate transported to the MBR tank 7 is removed by the screen 73 formed on the outer circumference of the foreign matter having large particles, and the leachate from which the foreign matter having large particles is removed through the membrane module 74. Happens. The leachate treated in this way is transferred to the ozone oxidation tank 8 (S70).

Subsequently, the leachate transported to the ozone oxidation tank 8 induces contact with ozone to treat hardly decomposable substances, and the ozonated leachate is transferred to the filtration tank 9 again (S80).

Subsequently, the leachate transferred to the filtration tank 9 is treated with the leachate using the A / C filter and then transferred to the discharge tank 10 (S90).

Subsequently, the leachate transferred to the discharge tank 10 disinfects and discharges the treated water to the outside (S100).

Such flow rate adjusting tank (1), anaerobic tank (2), pressurized flotation tank (3), oxygen-free tank (4), biofilm tank (5), precipitation tank (6), MBR tank (7), ozone oxidation tank (8), filtration tank (9), the food leachate that has undergone the leachate treatment process consisting of the discharge tank 10, the chemical oxygen demand (COD) of the first food waste leachate was 7 ~ 80,000 mg / ℓ, leachate treatment system according to the present invention Through it can be reduced to 90 ~ 120 mg / ℓ to prevent water pollution even if discharged to the outside, and also by using the treated water as a variety of agricultural water, fire fighting water, it has the effect of saving water resources.

As described above, the present invention by treating the food leachate through the flow control tank, anaerobic tank, pressure flotation tank, anoxic tank, biofilm tank, precipitation tank, MBR tank, ozone oxidation tank, discharge tank, leachate generated by food waste treatment Soil pollution, groundwater and river pollution by preventing it has the effect of contributing to environmental pollution.

Claims (3)

Inflow of food leachate flow rate adjustment tank (1) for adjusting the flow rate, Anaerobic tank (2) for anaerobic treatment of food leachate introduced from the flow rate adjustment tank (1) by anaerobic microorganisms, Pressurized flotation tank (3) in which solid-liquid separation occurs through a static mixer (300) for mixing the anaerobic food leachate in the anaerobic tank (2) with the water treatment chemical provided in the chemical tank (301), An anoxic tank (4) for removing nitrogen by denitrification of the leachate chemically treated in the pressurized flotation tank (3), A biofilm tank (5) for decomposing organic matters using the bioblock carrier (50) from which the leachate from which nitrogen has been removed from the oxygen-free tank (4) is used; A sedimentation tank 6 for removing sludge and discharging the supernatant of the leachate treated with organic materials by microorganisms in the biofilm tank 5; MBR tank (7) for filtering the leachate introduced from the settling tank 6 by the separation membrane, An ozone oxidation tank (8) for treating the hardly decomposable substance of the leachate water treated by the separator in the MBR tank (7), A filtration tank 9 for final treatment of the leachate treated by ozone in the ozone oxidation tank 8 with an activated carbon (A / C) filter; In the configuration consisting of a discharge tank 10 for discharging the treated water finally treated in the filtration tank 9 to the outside after sterilization treatment, The static mixer 300 has three roles of plane splitting, reorientation, and mixing, when the elements fixed by twisting 180 ° in the left and right directions in the pipe are connected at 90 °, respectively, and are transported through the fluid. A food leachate treatment system using a bioblock carrier, characterized in that at least two liquids, gases, and powders are mixed at the same time. The method of claim 1, wherein the bioblock carrier 50 is a food and drink using a bioblock carrier, characterized in that for discharging a polymer formed by heating and melting a high-density polyethylene resin having a density of 0.9 ~ 0.95 at 120 ~ 150 ℃ by an electric heater Leachate Treatment System. The method according to claim 1, Anaerobic microorganisms are Veillonella (Veillonella), Ashidaminococcus, Megasphaera, Propionibacterium, Eubacterium, Bifidobacterium ( Bifidobacterium, Bacteroides, Fusobacterium, Neptotrichia, Clostridium, or any one or two or more kinds of bioblocks, characterized in that a mixture of two or more selected Food leachate treatment system using a carrier.

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