KR100846693B1 - Livestock waste water treatment plant by aerobic denitrification - Google Patents

Abstract

A livestock wastewater treatment apparatus using aerobic denitrification is provided to increase the removal ratio of organic matters and nitrogen even without performing an internal circulation, increase the removal ratio of nitrogen and phosphorous, obtain clean supernatant, operate the apparatus easily, and reduce operational cost and construction cost of the apparatus. A livestock wastewater treatment apparatus using aerobic denitrification comprises: a general adulteration treater(2) for removing adulterations contained in livestock wastewater; a toxicity monitoring tank(3) for sensing the toxicity of livestock wastewater; a first storage tank(4) for storing the livestock wastewater for at least 7 days; a mixer(7) for mixing the livestock wastewater with a coagulant; a centrifuge(8) for separating solids from the livestock wastewater; a second storage tank(9) for storing the livestock wastewater temporarily; a supply pump(11) for supplying a constant amount of the livestock wastewater to the aerobic denitrification tank; an aerobic denitrification tank(12) including a first diffuser(15), an ORP meter(13), and a mixed solution concentration meter(14); an aeration tank(17) including a second diffuser(19); a first degassing tank(21) for degassing the livestock wastewater; a coagulation tank(22) for coagulating the livestock wastewater using a coagulant; a gravity clarifier(24) for settling the livestock wastewater; a return water pump(25) for returning supernatant of the gravity clarifier to the first degassing tank; a second aerobic denitrification tank(29) including a third diffuser(34), an ORP meter(30), and a mixed solution concentration meter(31); an alkali agent injector(32) for injecting an alkali agent into the livestock wastewater; a methanol injector(33) for injecting methanol into the livestock wastewater; a second aeration tank(36) including a fourth diffuser(38) and a DO(Dissolved Oxygen) meter(37); a second gravity clarifier(40) for settling the livestock wastewater gravitationally; a mixing pond(43) for mixing supernatant with a metal salt coagulant rapidly; a second degassing tank(44) for degassing the livestock wastewater while rapidly stirring the livestock wastewater; a floc growing tank(45) for mixing the livestock wastewater with a polymer coagulant to form a large floc; a coagulating clarifier(48) for separating supernatant and sludge from the livestock wastewater; and a third treater(50) for treating supernatant to discharge the treated supernatant.

Description

Livestock waste water treatment plant using aerobic denitrification {Livestock waste water treatment plant by aerobic denitrification.}

1 is a process chart showing the configuration of the present invention.

Figure 2 is an exemplary view showing the precipitation state of livestock wastewater of the present invention.

<Explanation of symbols for the main parts of the drawings>

1.Inlet

2. Comprehensive Complex Processor 2-1. Crash Conveyor

3. Toxicology monitor 3-1. Toxicity detector

4. 1 reservoir

5. Transfer pump

6. Chemical injection device

7. Mixer

8. Centrifuge 8-1. Sludge feeder

9. 2 reservoir

10. Storage room for debris

11. Supply Pump 11-1. Flow meter

12. Aerobic denitrification tank

13. ORP measuring instrument

14. Mixed solution densitometer

15. Air diffuser 1

16. Variable Air Flow Blower

17. Abandonment

18.DO meter

19. Air diffuser 2

20. Aeration blower 1

21. Degassing tank 1

22. Agglomeration Tank

23. Polymer flocculant injector

24. Gravity Settling Basin

25. Return pump

26. Sludge Return Pump

27. Sludge Return Flow Meter

28. Surplus sludge pump 1 28-1. Surplus Sludge Transfer Pipe

29. Aerobic denitrification tank 2

30. ORP measuring instrument

31. Mixed Liquid Densitometer

32. Alkaline Injector

33. Methanol Injector

34. diffuser 3

35. Variable air volume blower 2

36. Abandonment

37.DO Meter

38. diffuser 4

39. Aeration blower 2

40. Gravity settler 2

41. Sludge Return Pump 2

42. Surplus Sludge Pump

43. Mixed Paper

44. Degassing tank 2

45. Flock Growth Tank

46. Metal salt flocculant injector

47. Polymer Flocculant Injector

48. Agglomerated Settler

49. Surplus sludge pump2

50. Tertiary processing unit

51. Sludge Reservoir

52. Concentrated Dehydration Device

The present invention relates to livestock wastewater and manure treatment.

Conventional treatment methods used in livestock wastewater or manure treatment plant were mainly liquid erosion, Bacillus, SBR application, etc. Liquid erosion method was initially used to remove organic matter, nitrogen and phosphorus by anaerobic exhalation shift operation. Due to the trouble of driving and the microbial shock during anaerobic exhalation shift operation, it is currently divided into anaerobic tank and aerobic tank, and it removes organic matter, nitrogen and phosphorus while carrying it inside, so it is similar to A ₂ / O method. In order to increase the nitrogen removal rate, it was necessary to greatly increase the internal return cost, and there was a problem that was easily affected by the C / N (organic / nitrogen) ratio. Operation costs increase because it is difficult to operate efficiently and stably, and it is necessary to continuously add special expensive seed material. In the case of livestock wastewater where toxic substances such as fungicides are frequently introduced, Bacillus bacteria are special microorganisms, and similar planting sludge cannot be obtained from other facilities nearby, so they must be re-cultivated. There was a necessary problem.

In addition, the inflow of livestock wastewater containing toxic substances due to the inability to measure the presence or absence of toxic substances (microbial harmful substances) in the influent livestock wastewater, deteriorates or kills the growth of microorganisms in the reactor, resulting in a decrease in the functioning of the treatment facility or an operational shutdown. Was also generated.

In the case of livestock wastewater, the mixed liquid concentration (MLSS) of the reaction tank is generally higher than 5,000 mg / L and contains a lot of gas in the mixed liquid. Since it is not good and there is a large amount of scum and the sedimentation efficiency is poor, it is difficult to operate, expensive to install, and expensive to operate due to high liquid separation by using a mechanical device such as a pressure flotation tank or a belt sealer. there was.

The technical problem to be achieved by the present invention is to quickly monitor the toxicity of livestock wastewater inflow, and to perform aerobic denitrification, to increase the removal rate of organic matter and nitrogen without internal circulation, and to use a gravity settler and coagulation sedimentation battery, to stably separate solid-liquid And economical manure and livestock wastewater treatment equipment that is easy to operate and low in operation cost and construction cost by removing nitrogen and phosphorus by removing color and phosphorus, and processing by using microorganisms that have high water quality and clean water. To provide.

The present invention to achieve the above technical problem,

Livestock wastewater or manure (hereinafter referred to as livestock wastewater) introduced through the inlet 1 removes the contaminants in the contaminant comprehensive processor 2;

The livestock wastewater that has passed through the contaminant synthesis processor (2) is passed through the toxic monitoring tank (3) to one storage tank (4) and stored for at least seven days, and then the centrifugal separator through the mixer (7) with a transfer pump (5). (8), the polymer coagulant supplied from the chemical injection device (6) and the livestock waste water are mixed and coagulated in the mixer (7), and then transferred to the centrifuge (8);

The livestock wastewater from which the solids are separated in the centrifuge 8 is transferred to the two storage tanks 9 and temporarily stored;

The livestock wastewater stored in the second storage tank is continuously supplied to the aerobic denitrification tank 12 by a supply pump 11;

The exhalation denitrification tank 12 is a complete mixing reaction tank, and at the bottom of the exhalation denitrification tank 12, an air diffuser 1 (15) is supplied evenly for air supply, and connected to the variable air volume blower 16 by piping. In the aerobic denitrification tank (12), an ORP measuring device (13) and a mixed liquid concentration meter (14) are provided, and the measurement signal of the ORP measuring device is to be automatically linked with the variable air volume blower (16), and the aerobic denitrification tank (12). The ORP value of the livestock wastewater in the tank was kept constant at 300 mV (based on the hydrogen electrode);

The livestock wastewater that has passed through the exhalation denitrification tank 12 is transferred to the aeration tank 17, and an air disperser 2 (19) is installed at the bottom of the aeration tank 17, and the air disperser 2 is a pipe and aeration blower 1 (20). A DO meter 18 in the aeration tank's water, and the DO value of the livestock wastewater in the aeration tank 17 is 2 mg / L or more;

The livestock wastewater that passed through the aeration tank 17 is transferred to the degassing tank 1 (21) and then degassed and then transferred to the gravity-type sedimentation basin 24 through the flocculation reaction tank 1 (22), and the supernatant is an aerobic denitrification tank 2 ( 29), and the precipitated sludge is returned to the exhalation denitrification tank 12 through the sludge return pump 26, and a part of the supernatant water is returned to the degassing tank 1 (21) through the return water pump 25. ;

The exhalation denitrification tank 2 (29) is a complete mixing reaction tank, and an equalizer 3 (34) for supplying air is equally installed at the bottom of the aerobic denitrification tank 2 (29), and piped to the variable air volume blower 2 (35). The ORP measuring device 30 and the mixed liquid concentration meter 31 are installed in the exhalation denitrification tank 2 29, and the measurement signal of the ORP measuring device is set to be automatically linked with the variable air volume blower 2 35. The ORP value of the livestock wastewater in the denitrification tank 2 (29) is kept constant at 300 mV (based on the hydrogen electrode);

The livestock wastewater that has passed through the exhalation denitrification tank 2 (29) is transferred to the aeration tank 2 (36), and at the bottom of the aeration tank 2 (36), an air diffuser 4 (38) is installed, and the air diffuser 4 is a pipe. (39), the DO measuring device 37 is installed in the water of the aeration tank, and the DO value of the livestock wastewater in the aeration tank 2 (36) is 2 mg / L or more;

An alkaline injector (32) and a methanol injector (33) are connected to the exhalation denitrification tank (2);

The livestock wastewater passing through the aeration tank 2 (36) is transferred to the gravity-type sedimentation basin 2 (40) and precipitated, and the supernatant is transferred to the mixed paper 43, which is the next process, and the precipitated sludge is a sludge conveying pump 2 (41). By the exhalation denitrification tank 2 (29);

The livestock wastewater conveyed to the mixed paper 43 is rapidly mixed with the metal salt coagulant (ferrous chloride or ferric chloride) supplied from the metal salt coagulant injector 46, and is subjected to 5 to 5 in the next degassing tank 2 (44). After degassing with rapid stirring for 10 minutes, the gas was degassed and then transferred to the floc growth tank 45 to react with the polymer flocculant supplied from the polymer flocculant injector 47 to form a large floc, and then to the flocculation sedimentation basin 48 for supernatant and sludge. Separated into;

The sludge precipitated in the flocculation sedimentation basin 48 is transferred to the sludge storage tank 51 through the excess sludge pump 2 (49); And

The supernatant of the livestock wastewater passing through the flocculation sedimentation basin 48 is treated in the tertiary treatment apparatus 50 and then discharged to provide a livestock wastewater treatment apparatus using aerobic denitrification.

The configuration and operation of the present invention will be described in detail based on [Fig. 1].

Livestock wastewater or manure (hereinafter referred to as livestock wastewater) is introduced into the inlet (1) as a transport vehicle, and the livestock wastewater injected into the inlet (1) is free of contaminants, sand, seeds, etc. Next, it is transferred to one storage tank 4 through the toxicity monitoring tank 3 and temporarily stored.

The livestock wastewater stored in the first storage tank was transferred to the mixer 7 and the centrifugal separator 8 through the transfer pump 5, and the chemical injection device 6 was connected to the mixer 7 to mix the chemical and the livestock wastewater. It was made.

The livestock wastewater from which the sludge is separated in the centrifuge 8 is transferred to the two storage tanks 9 and temporarily stored, and the separated sludge is transferred to the storage compartment 10 such as a contaminant through the sludge conveying apparatus 8-1 and stored. .

The livestock wastewater stored in the two storage tanks 9 is transferred to the aerobic denitrification tank 12 through the supply pump 11, and the conveyed quantity is measured by the flow meter 11-1.

In the exhalation denitrification tank 12, while the ORP measuring device 13 and the variable air volume blower 16 operate in an automatic interlocking operation, air is supplied to the air diffuser 1 (15) installed at the bottom, and the livestock wastewater in the aerobic denitrification tank is constant. The value was kept.

The livestock wastewater that passed through the aerobic denitrification tank 12 was transferred to the aeration tank 17, which is the next process, and a DO measuring instrument 18 was installed in the aeration tank, and an air diffuser 2 (19) was installed at an even interval on the bottom. , Air diffuser 2 (19) was connected to the abandoned blower 1 (20) by piping.

The livestock wastewater passing through the aeration tank 17 is transferred to the degassing tank 1 (21), degassed, and then transferred to the gravity settling basin 24 through the coagulation tank 22, and is divided into supernatant water and sludge settling. It is transferred to the aerobic denitrification tank 2 (29) which is a process, and a part of the supernatant water is returned to the degassing tank 1 (21) by the return water pump 25, and the precipitated sludge is returned to the sludge conveying pump 26 and the sludge conveying. It conveys to the said exhalation denitrification tank 12 through the flowmeter 27.

ORP measuring unit 30 and the mixed liquid concentration meter 31 is installed in the aerobic denitrification tank 2 29, and an air diffuser 3 34 is installed at the bottom, and the air flow is connected to the variable air blower 2 35 by pipe, and the ORP measuring machine is installed. 30 and the variable air volume blower 35 is to maintain the ORP value in the exhalation denitrification tank 29 to be an automatic interlocking operation.

The livestock wastewater that passed through the aerobic denitrification tank 2 (29) is transferred to the aeration tank 2 (36), a DO measuring device 37 is installed in the aeration tank 2 (36), and an air diffuser 4 (38) is installed at the bottom of the pipe. To the blower blower 2 (39).

The livestock wastewater that has passed through the aeration tank 2 (36) is transferred to the gravity sedimentation basin 2 (40), and is separated into supernatant and sedimentation sludge, and the supernatant is transferred to the mixed paper 43, and the sludge conveys the sludge conveying pump 2 (41). Conveyed to the aerobic denitrification tank 2 (29).

The mixing paper 43 was provided with a mixing machine (not shown) for rapid stirring, and was connected to the metal salt coagulant injector 46.

The livestock wastewater passing through the mixed paper 43 is transferred to the degassing tank 2 (44), and the degassing tank 2 (44) is provided with a stirrer for degassing (not shown).

The livestock wastewater which passed the degassing tank 44 is transferred to the floc growth tank 45, and the slow growth stirrer (not shown) was installed in the floc growth tank 45. As shown in FIG.

The livestock wastewater passing through the floc growth tank 45 is transferred to the coagulation sedimentation basin 48, separated into supernatant and sludge, and the supernatant is transferred to the tertiary treatment unit for tertiary treatment and then discharged. It was transferred to the sludge storage tank 51 through the excess sludge pump 3 (49).

Part of the sludge precipitated in the gravity sedimentation basin 24 and a portion of the sludge precipitated in the gravity sedimentation basin 2 (40) is also sent as a sludge, sludge storage tank (51).

The sludge stored in the sludge storage tank was dehydrated in the concentrated dehydrator 52 and then taken out of the dehydrated cake.

Referring to the operation of the present invention in detail as follows.

Livestock wastewater collection vehicles (generally, small and medium-sized livestock wastewater treatment plants collect livestock wastewater or manure by means of a collection vehicle), and when the livestock wastewater is injected into the inlet (1), the contaminant synthesis processor (2) operates, After removing foreign substances such as contaminants, seeds and sand, the livestock wastewater from which the foreign substances are removed is transferred to the toxic monitoring tank (3) and is transferred to the first storage tank (4) through the toxic monitoring tank (3).

Toxic monitoring device (3-1) installed in the toxic monitoring tank (3-1) uses the respiratory action of microorganisms, and when livestock wastewater containing toxic substances harmful to microorganisms flows in, the microorganisms are inhibited by harmful substances and immediately respiration rate Decreases and appears on the toxic sensor.

As toxic substances can be monitored immediately, the driver can stop the livestock wastewater from the collection vehicle and take countermeasures, thus preventing the livestock wastewater treatment plant from operating due to the inflow of toxic substances and reducing the treatment efficiency. It is.

1 The storage tank 4 typically stores more than 7 days in order to store a long time so that harmful substances in the livestock wastewater can be naturally decomposed sufficiently.

The livestock wastewater stored in the first storage tank 4 is pumped by the transfer pump 5 and transferred to the centrifuge 8 via the mixer 7.

In the mixer (7), the water-soluble polymer flocculant (polymer) supplied from the chemical injection device (6) and the livestock waste water are rapidly mixed to cause agglomeration, and the agglomerated livestock waste water flows into the centrifuge (8), and the solids are formed by the action of centrifugal force. The silver is discharged to the sludge, and the supernatant is transferred to the two storage tanks 9 and stored.

Feeding livestock waste into the feeder or operating the centrifugal separator is usually carried out during the weekly working hours and daily minutes are processed, so more than one minute of storage is required.

The livestock wastewater stored in the two storage tanks 9 is pumped by the supply pump 11, and is metered by the flow meter 11-1, and a constant amount is continuously supplied to the aerobic denitrification tank 12 for 24 hours a day. .

The livestock wastewater transported to the aerobic denitrification tank 12 is an automatic interlocking operation of the variable air volume blower 16, the air diffuser 1 (15), and the ORP measuring instrument 13, and the ORP value is always (+) 300mV as a result of complete mixing. While maintaining a constant, aerobic denitrification occurs by the action of Nitrosomonas bacteria.

Nitrosomonas bacterium is an aerobic aerobic bacterium that oxidizes ammonia nitrogen to nitrite in a sufficient aerobic state, but it is found to oxidize and denitrify ammonia nitrogen in a limited aerobic state that lacks dissolved oxygen. As a result of the test, when the ORP value is + 300mV, the most active exhalation is known.

However, in a limited aerobic state, the growth of microorganisms is slowed down, so a long residence time is required to secure the microbial mass and to perform a sufficient reaction.

In general, nitrosomonas has a slow growth rate at a dissolved oxygen concentration of 0.5 mg O ₂ / L. Since the dissolved oxygen concentration at an ORP value of +300 mV is 0.3 to 0.7 mg / L, depending on the organic content and the microbial concentration, Overlap with slow growth areas.

Microbial reaction tanks in general sewage and wastewater treatment plants are difficult to apply aerobic denitrification due to low concentrations of wastewater and wastewater and short residence times in the reaction tanks, but the hydraulic residence time of microbial reaction tanks in livestock wastewater treatment facilities or manure treatment plants is 15-30. As it is very long in work, it is very suitable for applying aerobic denitrification.

On the other hand, nitrosomonas is susceptible to toxic substances, so the effects of toxic effects are not a problem in sewage treatment plants with low potential for toxic substances. However, fungicides, insecticides and disinfectants are often used to prevent livestock diseases in livestock farms. Therefore, in the livestock wastewater treatment plant that treats livestock wastewater containing these toxic substances, it is necessary to prevent the influx of toxic substances, so that efficient treatment with nitrosomonas is possible.

In addition, the total phosphorus (TP) inflow concentration of livestock wastewater treatment plant is high in the order of several hundred mg / L, and there is a limit to biological removal. However, the high color of livestock wastewater is not biologically treated, and the color is injected by injecting a coagulant such as ferric chloride. In the case of injecting these flocculants, the phosphorus in the livestock wastewater treatment plant is mainly suitable for chemical treatment using flocculents.

Since the aerobic denitrification efficiency is higher than 90%, it is very useful as a nitrogen removal method of livestock wastewater containing high concentration of nitrogen, and when the aerobic denitrification process is installed in two stages, the nitrogen concentration suitable for the discharge water quality standard of livestock wastewater is reached. Can be lowered.

In addition to nitrosomonas, the aerobic denitrification tank 12 also inhabits common aerobic microorganisms, so that organic matter is removed at the same time as nitrogen.

The livestock wastewater from which nitrogen and organics have been removed is nitrified to the residual ammonia (NH ₄ -N) in the livestock wastewater with high dissolved oxygen concentration of 1 to 2 mg / L in the aeration tank (17), Transfer to settling basin.

If sedimentation basins are separated into supernatant and sludge, gravity sedimentation basins do not settle well for the following reasons:

The livestock wastewater treated in an aerobic denitrification tank has a high mixed liquor concentration of more than 5,000 mg / L, and also has a gas attached to the sludge, which leads to poor sedimentation, flotation, and a large amount of scum on the surface even if settled. .

In the present invention, two techniques are used to solve this problem, one of which is to degas the livestock wastewater with rapid stirring for 5 to 10 minutes in a degassing tank, and the other is the concentration of 30-50% of the supernatant mixed with the livestock wastewater. Lowering and improving the sedimentation by washing the sludge of livestock wastewater.

According to the bench experiment, as shown in [Fig. 2], Figure a shows that 30 minutes have elapsed by gravity precipitation of livestock waste water as it is, b is 30 hours has elapsed due to gravity precipitation after mixing 30% of supernatant and degassing, c 30 minutes after mixing and degassing supernatant water 50% (50% supernatant, 50% livestock wastewater), and d is 30 minutes after gravitational sedimentation after mixing 50% supernatant water, injecting flocculant, and degassing.

As shown in the figure, a large amount of scum was generated in the case of gravity precipitated in the livestock wastewater (mixture) of the microbial reactor, and a little scum occurred in the case of gravity precipitated after mixing with 30% supernatant. , 50% supernatant water mixing and degassing after degassing, c precipitated well and there was no scum on the surface. 50% supernatant water mixing, ferric chloride injection, and gravity settled after degassing, precipitated sludge layer This was more concentrated and the supernatant was very clean without scum on the surface.

The livestock wastewater discharged from the aerobic denitrification tank 12 degasses the gas in the livestock wastewater with rapid stirring in the degassing tank 1 (21) for 5 to 10 minutes, and is transferred to the gravity settling basin 24 through the flocculation tank 23 to settle. It begins.

As described above, the livestock wastewater is not easily precipitated as it is, so 50 to 100% of the supernatant is returned to the degassing tank 1 (21) using the return water pump 25 and mixed with the livestock wastewater in the degassing tank 1 (21). After degassing and transported to the gravity sedimentation basin (24) to precipitate, the separation of the supernatant and sludge occurred well.

The flocculation tank 22 and the polymer flocculant injector 23 in FIG. 1 are emergency facilities in case the water quality of livestock wastewater deteriorates and precipitation becomes poor.

The sludge precipitated in the gravity settling basin 24 is conveyed to the aerobic denitrification tank 12 through the sludge conveying pump 26 and serves to maintain a constant mixed solution concentration.

The livestock wastewater (supernatant) flowing out of the gravity settling basin 24 is transferred to the aerobic denitrification tank 2 29 and undergoes the same process as the aerobic denitrification tank 12, whereby nitrogen is removed by aerobic denitrification and organic matter is also removed. .

The livestock wastewater of the aerobic denitrification tank 2 (29) is provided with an alkali injector 32 and a methanol injector 33 in case of necessity of organic matters or low pH compared to the nitrogen concentration. ) Can be injected.

The livestock wastewater discharged from the aerobic denitrification tank 2 (29) is sufficiently abandoned in the aeration tank 2 (36) and transferred to the gravity sedimentation basin 40 in the aerobic state, and separated from the gravity sedimentation basin 2 (40) into the supernatant and sludge so that the supernatant is mixed. The sludge, which is transferred to the paper 43, is returned to the aerobic denitrification tank 2 29 to maintain a constant concentration of the mixed liquid.

The livestock wastewater treated in the aerobic denitrification tank 2 (29) and the aeration tank 2 (36) has almost no organic matter and nitrogen, and the concentration is lower than that of the aerobic denitrification tank (12).

Livestock wastewater introduced into the mixing tank 43 contains a lot of phosphorus and chromaticity to remove these substances.

When phosphorus is injected at a ratio of 1 mole of metal salt coagulant such as ferric chloride per mole of phosphorus, insoluble compounds are formed and precipitated and removed, and color is effectively removed by injecting ferric chloride with 400 to 700 mg / L.

When a coagulant such as ferric chloride is injected, a large amount of carbon dioxide is generated while a chemical reaction occurs. In the process of injecting a coagulant at a high concentration such as livestock wastewater, the amount of carbon dioxide is large, which is a solid in the mixed liquid of the livestock wastewater. It attaches to the material, hinders gravity precipitation and generates large amounts of scum on the surface of the water.

In order to solve this problem, in the present invention, a carbon salt coagulant (ferric chloride) is injected into the mixed paper 43 and mixed, followed by rapid stirring in the degassing tank 44 for 5 to 10 minutes, and carbon dioxide gas generated when the metal salt coagulant is injected. After degassing completely, while injecting a polymer flocculant (polymer) into the floc growth tank 45, the mixture was stirred at a low speed to grow into a large and heavy floc, and then transferred to the flocculation sedimentation basin 48 and separated into supernatant and sludge. Subsequently processed in the tertiary treatment device 50, and then discharged, the precipitated sludge is pumped to the sludge storage tank 51 by the excess sludge pump 2 (49), and then dehydrated by dehydration in the concentrated dehydration device (52). The cake is taken out to the outside.

Detailed Description of the Invention The present invention has a side biased with respect to embodiments of a specific structure by the following detailed description, and those skilled in the art, for example, can fill a microbial carrier in a limited aerobic tank or rotate a biofilm contact device without departing from the spirit of the present invention. Infinite variations or modifications will be possible, such as the provision of such modifications or variations will be construed as being included in the protection scope of the present invention.

The present invention is to quickly monitor the toxicity of the livestock wastewater, including aerobic denitrification, to increase the removal rate of organic matter and nitrogen without internal circulation, and to process using microorganisms commonly available in the surrounding, gravity sedimentation and flocculation sedimentation By using solid-liquid separation and removal of color and phosphorus, high removal rate of nitrogen and phosphorus, high water quality of clean water, easy operation, low operating cost and construction cost, economical manure and livestock wastewater treatment is possible.

Claims (1)

A composite waste processor for removing impurities contained in livestock wastewater or manure (hereinafter referred to as livestock wastewater) introduced through the inlet 1; Toxic monitoring tank (3) for detecting the toxicity of the livestock wastewater passed through the complex of the complex; A storage tank (4) for storing the livestock waste water for 7 days or more; A mixer (7) for mixing the livestock wastewater and the flocculant supplied from the chemical injection device (6); A centrifuge (8) separating the livestock wastewater passed through the mixer; Two storage tanks (9) for temporarily storing the livestock wastewater; A supply pump 11 for continuously supplying the livestock wastewater of the second storage tank to the aerobic denitrification tank 12 in a predetermined amount; The livestock wastewater of the two storage tanks and the return sludge precipitated from the gravity settling basin 24 are introduced, and an air diffuser 15 connected to the blower 16 by pipe is installed evenly on the bottom, and the ORP meter 13 and the mixed liquid concentration meter An aerobic denitrification tank 12 for providing 14 and automatically interlocking with the variable air volume blower 16 to keep the ORP value constant; Aeration tank 17 into which the livestock wastewater of the exhalation denitrification tank is introduced, and an aerator 2 (19) is installed at the bottom, and the DO value of the livestock wastewater is maintained at 2 mg / L or more; A degassing tank 1 (21) for degassing livestock wastewater introduced from the aeration tank; An agglomeration reaction tank 1 (22) for injecting a flocculant into the livestock wastewater introduced from the degassing tank 1 to agglomerate A gravity sedimentation basin 24 for depositing livestock wastewater introduced from the flocculation reactor; A return water pump 25 for returning the supernatant water of the gravity settling basin 24 to the degassing tank 1 (21); The supernatant of the gravitational sedimentation basin (24) is introduced, and an aerobic denitrification tank (2) including an acid generator (3) 34 installed on the bottom, an ORP measuring device (30), and a mixed liquid concentration meter (31), wherein the ORP value is kept constant. 29); An alkali injector 32 for injecting an alkaline agent into the exhalation denitrification tank 2 29; A methanol injector 33 for injecting methanol into the exhalation denitrification tank 2 29; Aeration tank 2 (36) for introducing livestock wastewater passing through the exhalation denitrification tank 2 (29), and having an air ventilator 4 (38) and a DO measuring device (37) installed to maintain a DO value of 2 mg / L or more; Gravity sedimentation basin 2 (40) for sedimenting the livestock wastewater passing through the aeration tank 2 by gravity; Mixing paper 43 into which the supernatant of the gravity sedimentation basin 2 is introduced and rapidly mixed with the metal salt flocculant; A degassing tank 2 (44) for degassing the livestock wastewater introduced from the mixed paper (43) while stirring rapidly for 5 to 10 minutes; A floc growth tank 45 for forming a large floc by mixing the livestock wastewater introduced from the degassing tank 2 with a polymer flocculant; Agglomerated sedimentation basin 48 for separating livestock wastewater introduced from the floc growth tank into supernatant and sludge; And Livestock wastewater treatment apparatus using aerobic denitrification, characterized in that consisting of a tertiary treatment device (50) for treating and discharged the supernatant of the flocculated sedimentation basin.

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