KR100457698B1 - Livestock wastewater treatment method and equipment using STP waste excess sludge - Google Patents

Abstract

In the present invention, the sewage treatment apparatus (A) and the livestock wastewater treatment apparatus (B) are connected to the lower part of the final settler (5) of the sewage treatment apparatus (A) by a pipe of the surplus sludge livestock wastewater treatment apparatus (B). Sewage is characterized in that the supernatant of the sedimentation tank 13 of the livestock wastewater treatment device (B) is connected to the pipe to be injected into the settlement 1 of the sewage treatment device (A). The present invention relates to a livestock wastewater treatment method using a treatment plant excess sludge and an apparatus thereof.

Description

Livestock wastewater treatment method and apparatus using sewage treatment plant excess sludge {Livestock wastewater treatment method and equipment using STP waste excess sludge}

The present invention relates to a method and apparatus for treating livestock wastewater using excess sludge in sewage treatment plant, and in detail, relates to improvement of biological treatment efficiency of high concentration livestock wastewater when biologically treating high concentration livestock wastewater and then treating it with sewage treatment plant. In order to increase the treatment efficiency of livestock wastewater, the surplus sludge of sewage treatment plant together with the return sludge of the biological livestock wastewater treatment facility is added to the compliance tank to make the surplus sludge suitable for livestock wastewater treatment, and then to the livestock tank of the livestock wastewater treatment facility. The present invention relates to a livestock wastewater treatment method using an excess sludge in a sewage treatment plant and an apparatus thereof for increasing the wastewater treatment efficiency.

Livestock wastewater treatment is difficult to decompose compared to manure and sewage. Therefore, rather than treating the livestock wastewater alone and discharging it, the livestock wastewater treatment plant is installed in the sewage treatment plant site for biological treatment of the livestock wastewater, and the treated water is mixed with the influent of the sewage treatment plant and discharged after reprocessing in the sewage treatment plant. Method, namely sewage treatment method, is mainly used.

For example, Korean Laid-Open Patent Publication No. 2002-0021289 discloses that after crushing food waste and sludge, the sludge-ized food waste is mixed with barn manure, and then sawdust is added to supply air while stirring. After fermentation and composting, the concentration of the supernatant is equalized, and then the food waste and livestock wastewater mixed with denitrification and residual pollutants are treated by biological treatment to remove foreign substances in the homogenized wastewater. The treatment method is described,

In addition, Korean Patent Publication No. 20001-0091641 discloses a method and apparatus for producing organic fertilizer using organic waste and inorganic materials by aerobic fermentation by mixing food waste and livestock manure.

Publication No. 2002-0082166 discloses a method for removing nitrogen and phosphorus by using microorganisms for livestock wastewater or manure in the liquid corrosion method, and a sludge reduction system accordingly.

The prior art as described above is a technology for treating food waste or wastewater and livestock wastewater by mixing livestock wastewater with food waste or other wastewater, using fermentation of microorganisms contained in the livestock wastewater,

Livestock wastewater is high concentration, hardly decomposable compared to general sewage or manure, and takes longer time to decompose livestock wastewater biologically, and nitrogen concentration is excessively higher than organic concentration, so the nutritional balance is not met. Due to the high level of technology required to keep the livestock wastewater treatment plant bioreactors normally, such as barn disinfectants used for excessive livestock sterilization to prevent infectious diseases, many livestock wastewater treatment facilities do not exhibit normal efficiency, and livestock wastewater as designed flow rate. In addition to the fundamental reasons for the treatment of the livestock, the microorganisms contained during the treatment of livestock wastewater containing excessive nitrogen and organic matter concentrations and livestock sterilization solution for the prevention of infectious diseases, such as aerobic or anaerobic fermentation, are maintained at a constant temperature for a long time. Add to keep it Required by the device has been a real problem that can not be used.

In order to solve the problems as described above, the present invention is a biological treatment of livestock wastewater, the surplus sludge in the sewage treatment plant as a substitute for the livestock wastewater treatment in the compliance tank to be suitable for livestock wastewater treatment and then put into the bioreactor of the livestock wastewater treatment plant livestock wastewater The present invention has been made in an effort to provide a method and apparatus for treating livestock wastewater using excess sludge in a sewage treatment plant which increases treatment efficiency and increases throughput and reduces the amount of dehydration cake generated by aerobic digestion of excess sludge in a sewage treatment plant. will be.

1 is an overall view of a livestock wastewater treatment apparatus using the sludge of the sewage treatment plant of the present invention.

2 is 2002.1. Table of water quality analysis results for each sewage treatment plant from 1 to 12.31.

Figure 3 is a change diagram of the coliform colony of the sewage treatment plant inflow and discharge water before (January to June) and (July to December) before applying the livestock wastewater treatment method using the sewage treatment plant excess sludge of the present invention.

Figure 4 is a reduction chart of the amount of dehydrated cake (CAKE) generated in the sewage treatment plant during treatment in accordance with the present invention.

5 is a water quality analysis result of each livestock wastewater treatment plant process from January 1 to December 31, 2002.

Figure 6 is a diagram operated by increasing the livestock wastewater input by more than 20% after the sewage treatment plant surplus sludge treated according to the present invention into the livestock wastewater treatment plant.

7 is a diagram showing the result of almost no change in the amount of dehydration cake (CAKE) generated in the livestock wastewater treatment plant even if the sewage treatment plant surplus sludge is operated in the livestock wastewater treatment plant according to the present invention.

8 is a diagram showing the result that the discharged water quality remains stable even if the amount of discharged water from the livestock wastewater treatment plant increases during treatment according to the present invention.

Figure 9 is a diagram that increases the removal efficiency of VSS (volatile solids) in the process of increasing the livestock waste loading in the treatment according to the present invention.

10 is a detailed view of the impurities removing device of the present invention

11 is a detailed view of the sedimentation tank of the present invention

12 is a detailed view of the fine contaminant removal device of the present invention

Figure 13 is a detailed view of the raw water tank of the present invention

Figure 14 is a detailed view of the anaerobic tank and aeration tank of the present invention

15 is a detailed view of the sedimentation tank of the present invention.

<Description of the Drawings>

Settlement paper (1), hydraulic pump (2), initial settler (3), aeration tank (4,19), final settler (5), concentrator (6,14), dehydrator (7,15), debris removal device (8) , Sedimentation tank (9), fine contaminant removal device (10), raw water tank (11), bioreactor (12), sedimentation tank (13), acclimatization tank (16), anaerobic tank (17), anaerobic tank (18)

In order to achieve the above object, the present invention connects the sewage treatment plant excess sludge discharge pipe to the livestock wastewater treatment plant compliant tank and connects the aeration facility and the conveying sludge inlet pipe in the tank to form an organic connection.

In general, there are many people who are concerned that there are side effects when introducing sewage treatment sludge into livestock wastewater treatment plant because microorganisms treating livestock wastewater and microorganisms treating sewage are different. Actual surplus sludge is mixed with return sludge of livestock wastewater treatment plant. After a day of aeration and adaptation, the treatment efficiency is increased compared to before input into the bioreactor for livestock wastewater treatment plant, and the livestock wastewater treatment capacity is increased by about 20% and maintains the treated water quality stably even when the load of influent livestock wastewater changes. Can be.

In addition, when the surplus sludge in the sewage treatment plant is added to the bioreactor for livestock wastewater treatment plant, the residence time of about 10 days or more is increased, so that the microorganisms become asset and aerobic digestion, and the organic matter contained in the activated sludge is decomposed and oxidized. Compared with the livestock wastewater treatment plant bioreactor, the sludge's sedimentation and dewatering properties are improved, sludge production is reduced, and the amount of coagulant is reduced.

In the present invention, the biological reaction tank refers to the existing biological livestock wastewater treatment facilities, and there may be various livestock wastewater treatment methods such as A / O method, A2 / O method, MLE method, and oxidative sphere method. It is one of the A2 / O method that can remove nitrogen and phosphorus. The excess sludge input amount is 50㎥ per day, which is about 50% of the incoming livestock wastewater (100㎥ / day).

The sedimentation basin (1) of the sewage treatment system is divided into the inlet sediment sedimentation part and the outflow part. The inlet part is composed of an inlet valve, a wooden screen, a contaminant conveying conveyor, etc. It is composed of a conveying conveyor for transporting the lifted soil, skip hoist for carrying out, and a sedimentation hopper furnace, and the outlet part is composed of a fine screen, a contaminant conveying conveyor, a skip hoist and a discharge hopper, and an outlet valve. The sedimentation basin (1) was made to be opened and closed at the time of maintenance and maintenance of two independent channels.

The inflow pump (2) is an inflow pumping station for the purpose of smoothly coping with fluctuations in the inflow and outflow water. The inflow pump is divided and the pump operation is controlled by adjusting the number of inflow pumps according to the water level. As a motor pump, it is suitable for maintenance and operation efficiency.

The first sedimentation cell (3) has a total of four sewage inflows, and an inflow gate for each channel is installed at the inlet to maintain the sedimentation basin. In the sludge settling section, sediment sludge is generated by free sedimentation, and the sludge settled by the travering bridge type sludge remover at the speed of 0.6m / min is collected and stored in the sludge hopper and drawn out by the sludge pump. And pressurized into the drum screen chamber. The debris generated in the drum screen is taken out and the filtrate is transferred to a thickening tank. The sludge drawing pump draws 97% water content sludge by operating a motor control valve for intermittent operation of 4 papers for 10 minutes twice a day by drawing by the oil gauge and timer.

The aeration tank 4 is a process in which colloidal and soluble organic substances in the sewage passing through the initial settler 3 are adsorbed and removed by the microorganisms acting in the tank so that sufficient oxygen supply to the activated sludge and MLSS do not precipitate. It is operated by a diffuse all-aeration method. The air supply facility is operated by installing two ROTARY BLOWER 28㎥ / min x 6,000mmAq and is equipped with two regulators of 14㎥ / min x 6,000mmAq as spares for water quality deterioration. The conveying sludge flows into the conveying sludge pipe at the front of the aeration tank 4 and is intermittently operated by the parcel water nozzle in order to suppress the foaming phenomenon by the synthetic detergent in the sewage.

The sewage that went through the pretreatment from the initial settler (3) is introduced into the aeration tank (4) to decompose organic matter by microorganisms.

This aeration tank 4 is supplied with sufficient oxygen so that aerobic microorganisms can grow. This oxygen is supplied by an aeration device composed of a separate blower and diffuser, not shown. The aeration tank 4 is mixed with pretreated wastewater introduced from the initial settler 3 and activated sludge containing microorganisms. Activated sludge is returned to the sludge deposited from the final settler 5 described below to maintain a constant level at all times.

Microorganisms contained in activated sludge absorb energy dissolved organic matter contained in wastewater to synthesize energy and new cellular material. Therefore, the amount of organic matter dissolved in wastewater is reduced, and the amount of activated sludge including microorganisms is increased.

The final settler 5 is a place where sedimentation and separation of activated sludge containing microorganisms are carried out from the mixed solution introduced from the aeration tank 4. In other words, the microorganisms ingesting the dissolved organic matter in the aeration tank 3 are precipitated and separated by gravity. The solids separated from the final settler 5 are returned to the aeration tank 4 to repeat the process of decomposing organic matters. At this time, if the activated sludge increased by cell material synthesis in the aeration tank 4 is not discharged to the outside of the system, the concentration of activated sludge increases in the aeration tank 4 and the amount of microorganisms increases, whereas the inflow of organic matter into the inflow sewage is almost constant. Since the balance of microorganisms and food sources is broken and the quality of treated water is deteriorated, sludge more than necessary, that is, excess sludge, must be drawn out of the system.

Sewage surplus sludge drawn from the final settler 5 flows into the compliant tank of the livestock wastewater treatment plant.

The final sedimentation system (5) is sewage flowing into the aeration tank (4) is sediment activated sludge in the sedimentation in the final sedimentation system (5) designed to have a surface load of 20 ~ 30㎥ / ㎡ day, the supernatant through the overflowware and runoff Discharged. The activated sludge of the final settler (5) is collected in the center driven strut type sludge remover and partly returned to the aeration tank by the sludge pump, and the rest is transferred to the distribution tank by the excess sludge pump to the distribution tank. The pump with the following specifications was newly installed and the surplus sludge was pumped to the livestock wastewater treatment plant compliant tank 16 to improve the treatment efficiency.

MODEL: IPV-815, Rated Voltage: 220V, Power Consumption: 1,130W, Insulation Type: Class A, Rotation: 3,350rpm, Head: 12M (Underwater), Flow Rate: 280 ℓ / min, Discharge Tube: 50mm,

The thickening tank 6 was conventionally introduced into the distribution tank of the raw sludge and the surplus sludge of the final settler 5 into the distribution tank of the thickening tank 6, flowed into the thickening tank 6, the gravity sedimentation and concentration was improved. As a result, the raw material was pushed into the thickening tank 6 to reduce the amount of dehydration and the water content.

The dehydrator 7 is installed and operated to adjust the sludge introduced through the thickening tank 6 to a polymer flocculant and to lower the water content to solidify the dehydration cake to facilitate the discharging and disposal of the sludge. It is reduced to 1/5.

The debris removal device (8) of the livestock wastewater treatment plant is operating the coarse debris removal device to remove the contaminants introduced with the wastewater, and also to remove the debris in the livestock wastewater and to remove dehydration, seeds, sand, etc. In consideration of the characteristics of the waste water, it is operating a complex contaminant processor composed of a rotary screen, a screw press, a liquid cyclone, and a centrifuge.

The sedimentation tank 9 is the wastewater passing through the debris removal device 8 is introduced into the sedimentation tank, and also operates the stirrer to prevent the sedimentation of the wastewater and the formation of SCUM (scum).

The fine contaminant removal device 10 is a horizontal continuous centrifugal dehydrator, which removes the unremoved fine solids from the comprehensive contaminant processor to prevent the failure of the post-treatment process and to remove the insoluble BOD (biological oxygen demand) and phosphorus (P). It is a facility to increase the nitrogen removal efficiency of organic nitrogen.

Raw water tank (11) is a capacity that can be stored for more than 1.6 days in order to transfer the waste water from which fine contaminants have been removed and the returned concentrated tank supernatant to the first anaerobic tank, and prevents the sedimentation of water or the formation of scum in the tank. To equalize, give up about 1.0㎥-air / ㎥hr.

Bioreactor 12 is aerobic conditions (17), anaerobic tank (18), aeration tank (19) installed in the front of the facility consisting of a clarification tank (16) to improve the mixing of the return sludge and sewage treatment plant surplus sludge after aerobic conditions Residual wastewater is treated in the sewage treatment plant to be suitable for livestock wastewater treatment. When the food available in this process is depleted, aerobic microorganisms begin to consume their plasma to get the energy needed for cell maintenance. It is said that the microorganism is in the endogenous breathing stage.

As shown in the above equation, when the tissue is oxidized in aerobic state, it becomes carbon dioxide and water ammonia. Indeed, 75 to 80 percent of tissue can be oxidized, with the remaining 20 to 25 percent composed of inert components and organic compounds that are not biodegradable. The ammonia produced during the oxidation process continues to oxidize to nitrate as the digestion progresses. The compliant tank 16 is a place where the excess sludge is adapted for livestock wastewater treatment while being mixed with the sewage surplus sludge and the livestock wastewater treatment plant conveying sludge for about 1 day. The aeration tank 16 is installed in the compliance tank to maintain aerobic conditions. The excess sludge is introduced into the anaerobic tank 17 when it is adapted for livestock wastewater treatment. From here, the livestock wastewater is treated by A2 / O method (biological nitrogen, phosphorus removal method combining anaerobic, anaerobic and aerobic processes). In addition, the internal circulation is intermittently made between the compliant tank 16 and the anoxic tank 18 to increase the phosphorus removal efficiency.

Comprehensive tank (16), anaerobic tank (17), anoxic tank (18) and aeration tank (19) are referred to as a bioreactor (12), where the bioreactor (12) is introduced into the pre-treatment livestock wastewater from which contaminants and sediments are removed. Conditions and aerobic aeration conditions are repeated to oxidize organic decomposition by microorganisms and organic nitrogen and ammonia nitrogen contained in influent livestock waste water to nitrate nitrogen and reduce to nitrogen gas to degas into air. In addition, phosphorus is removed by reducing phosphorus concentration of treated water by increasing phosphorus content in surplus sludge by repetition of phosphorus absorption and release process in the microorganism by repeated anaerobic and aerobic conditions.

The bioreactor 12 is mixed with pretreated wastewater from which contaminants and sediments are removed and activated sludge containing microorganisms. The livestock wastewater treatment activated sludge is returned to the sewage sludge from the settling tank 13, which will be described below, and maintains a constant level as in the wastewater treatment plant aeration tank 4, and synthesizes new cell material in the process of decomposing livestock wastewater. As a result, the amount of sludge is increased.

In the anaerobic tank 17, which is the next process, an anoxic environment is created in order to denitrify nitrate nitrogen (NO3-N), and stirred with an agitator in water for mixing of microorganisms and wastewater. In the anoxic tank 18, as an oxygen-free tank 18 for denitrifying nitric nitrate (NO3-N) produced by nitrification to N2 gas by denitrification, an anoxic condition is installed in a long tank and stirred to create anoxic conditions. Denitrification bacteria use oxygen as the final acceptor of electrons generated by oxidative decomposition of organic materials. In the absence or absence of oxygen, chemically bound oxygen such as nitrogen nitrate (NO3-N) is used as the electron acceptor. There should be no oxygen. Nitrogen nitrate (NO3-N) in the aeration tank is circulated (returned) to the anoxic tank in an amount of 300% of the inflow.

The aeration tank 19 is used as a carbon source in biological denitrification and oxidized by giving up in the aeration tank 19 to remove the remaining methanol and organic substances.

In the settling tank 13, the biologically decomposed bioreactor in the bioreactor 12 is introduced into the settling tank 13. The sedimentation tank 13 is a place for sedimentation and separation of sludge containing microorganisms in the finished biological reaction solution. In other words, it is a process of precipitating and separating microorganisms ingesting dissolved organic matter in the bioreactor 12 by gravity. At this time, the separated solid is returned to the bioreactor 12 to repeat the process of decomposing the organic matter. At this time, as in the final sedimentation plant (5) of the sewage treatment plant, sludge, ie, surplus sludge, which is required, must be drawn out of the system, and the drawn excess sludge is concentrated, dehydrated, and composted. The activated mixed solution is naturally settled by the appropriate residence time in the settling tank 13, and then the supernatant is linked to the sewage treatment plant from the discharge tank, and the sludge settled below the settling tank 13 is collected and returned to the center.

The sludge thickening tank 14 reduces the volume of waste sludge pressurized by the pump in the settling tank 13 to reduce the size of the sludge treatment facility, and the supernatant separated by solid-liquid separation by gravity concentration is the raw water tank 11. Flows into.

Dewatering facility (15) is a facility for the purpose of reducing sludge by removing water to facilitate the handling and final disposal of sludge. The concentrated sludge transferred to the sludge concentrated storage tank is quantitatively introduced into the belt press type dehydrator by the sludge feed pump and a polymer coagulant is used to increase the dehydration efficiency.

Hereinafter, the present invention will be described in detail with reference to the following Examples.

Example

First process (sewage treatment process)

When sewage flows into the sedimentation basin (1), the inflow of sewage removes the sedimentary sediment, and the removal of the sedimentary sediment is carried out by the sedimentation lifting device and the salvaged sediment, which are devices for lifting the normal sedimentary soils installed in the sedimentation basin. It is composed of conveying conveyor for conveying, skip hoist for carrying out, and sedimentation hopper furnace, etc., and the outlet part has a fine screen, a miscellaneous material conveying conveyor, a skip hoist and a discharging hopper, an outlet valve, etc. Is removed by

The supernatant is transferred to the initial settler (3) in the hydraulic pump (2) connected to one side of the settling basin (1), the settling sludge is generated by the free settling in the first settler (3) and 0.6m in the bottom of the first settler (3) Sludge precipitated by the traversing bridge type sludge remover at / min speed is collected, stored in the sludge hopper, drawn out by the sludge pump and pumped to the drum screen room, and the contaminants generated in the drum screen are discharged and the filtrate is concentrated in the tank. The sludge drawing pump is operated by a motor control valve for intermittent operation of 4 papers for 10 minutes twice a day by drawing by the oil gauge and timer, and draws sludge with 97% water content.

The supernatant that has passed through the initial settler 3 flows into the aeration tank 4 installed on one side of the first settler 3 and flows in,

The pretreated wastewater introduced from the initial settler (3) is mixed with activated sludge containing microorganisms, and the activated sludge is always kept at a constant level by receiving the sludge precipitated from the final settler (5) described below.

Inflow sewage is supplied with sufficient oxygen supply and mixed liquid suspended solids (MLSS) by means of aeration system composed of a separate blower and a diffuser that are not shown so that aerobic microorganisms can grow on activated sludge partially introduced from the final settler (5). It is operated by an acid-type full-aeration method, and (the equipment that supplies air is operated by installing two ROTARY BLOWER 28㎥ / min x 6,000mmAq and two regulators of 14㎥ / min x 6,000mmAq considering the deterioration of water quality. The resulting sludge is introduced into the conveying sludge pipe at the front of the aeration tank (4) and intermittently operated by the parcel water nozzle to suppress foaming by synthetic detergent in sewage). After sufficient oxygen is supplied to the activated sludge, it is introduced into the final settling battery 5 formed on one side of the aeration tank 4,

In the final sedimentation cell (5) is a place for sedimentation and separation of activated sludge containing microorganisms from the mixed solution introduced from the aeration tank (4), that is, by separating the microorganisms ingested dissolved organic matter in the aeration tank (3) by gravity. The solids separated from the final settler 5 are returned to the aeration tank 4 to repeat the process of decomposing organic matters. (At this time, if the activated sludge increased by the cell material synthesis in the aeration tank 4 is not discharged to the system, the activated sludge concentration increases in the aeration tank 4 and the amount of microorganisms increases. Therefore, the balance of microorganisms and food sources is broken, which leads to deterioration of the treated water quality. Therefore, more sludge, that is, excess sludge, must be drawn out of the system.)

Sewage surplus sludge drawn from the final settler (5) is introduced into the compliance tank of the livestock wastewater treatment plant, which is the next process, the supernatant of the final settler (5) is discharged through the overflowware and the outflow channel,

The sedimentation sludge formed in the initial settler 3 is installed on the other side of the first settler 3, and the sludge is removed at the bottom of the initial settler by a muddy type (TRAVELLING BRIDGE TYPE) sludge remover at a speed of 0.6 m / min. After the removal of the concentrated solution is added to the distribution tank of the concentration tank 6, the sludge introduced through the concentration tank (6) is adjusted to a polymer flocculant in the dehydrator (7) and lowered the water content to solidify the dehydration cake to take out the sludge It was.

Second Process (Livestock Wastewater Treatment Process)

To remove the impurities in the livestock wastewater, the wastewater removal device 8 was passed through and removed. Then, the wastewater passing through the wastewater removal device 8 was introduced into the sedimentation tank 9 to settle the wastewater by the built-in stirrer. After sedimentation by preventing the formation of the scavenger and SCUM (scum), the precipitate is removed, and the supernatant is transferred to a fine contaminant removal device 10 formed at one side of the immersion tank 9 to a horizontal continuous centrifugal dehydrator. After removing the fine solids that have not been removed

Stored together with the supernatant of the concentrated tank 14 conveyed and conveyed to the raw water tank 11 installed on one side of the fine contaminant removing device 10 (the size of the capacity to store more than 1.6 days, raw water tank 11) In order to prevent sediment or scum from forming in the wastewater and to equalize the wastewater, abandonment of about 1.0㎥-air / ㎥hr should be given up.)

Waste water stored in the raw water tank 11 for a predetermined period of time is transferred to the compliant tank 16 of the bioreactor 12 installed on one side of the raw water tank 11, the compliant tank 16 is the final of the first process When the excess sludge in the sedimentation basin (5) is introduced to maintain the mixed rich solids (MLSS) concentration as high as 1% or more, the excess sludge is mixed with the return sludge and the livestock wastewater treatment plant, and the surplus sludge is suitable for the livestock wastewater treatment. Aerated by the built-in aeration to maintain aerobic conditions, and then transfer to the anaerobic tank (17) installed on one side to create an oxygen-free environment to denitrify nitric acid (NO3-N) and mix the microorganism and wastewater In order to agitate with an agitator (in this case, the internal circulation is intermittently between the acclimation tank 16 and the anaerobic tank 17 to increase the phosphorus removal efficiency), and then transferred to the anaerobic tank 18, the nitrification furnace in the anoxic tank 18 is used. produce As an oxygen-free tank (18) for denitrifying nitric acid (NO3-N) to N2 gas by denitrification bacteria, an anoxic condition was formed in a long tank to stir and created anoxic conditions. When oxygen is used as the final acceptor of electrons generated when there is not enough oxygen, chemically bound oxygen such as nitrate nitrogen (NO3-N) is used as electron acceptor, so there should be no dissolved oxygen. 19) nitrate nitrate (NO3-N) is internally circulated (returned) to an anaerobic tank 18 in an amount of 300% of the inflow amount, and then transferred to the aeration tank 19 installed on one side, and then the aeration tank ( 19) is used as a carbon source in biological denitrification and oxidized by abandoning in the aeration tank (19) to remove the remaining methanol and organic substances and is installed on one side of the aeration tank (19). After being transferred to the settling tank 13, the activated mixed solution introduced into the settling tank 13 is naturally settled by a suitable residence time, and then the supernatant is linked to the sewage treatment plant from the discharge tank, or flowed into the raw water tank 11 The sludge settled in the lower part of the settling tank 13 is collected in the center and transferred to the dehydrator 15 formed on one side, and the concentrated sludge transferred to the dehydrator 15 of the belt press type is dehydrated by the dewatering machine 15 of the belt press. It was carried out by a carrying out apparatus (not shown), and was processed.

In this case, a polymer coagulant may be used to increase the dehydration efficiency in order to maximize dehydration.

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

1 is a whole process chart of livestock wastewater treatment using sewage sludge in the sewage treatment plant of the present invention, Figure 2 is 2002.1. Table 1 shows the results of water quality analysis for each sewage treatment plant from January to December 31, before and after applying livestock wastewater treatment using sewage sludge in the sewage treatment plant of the present invention (January to June) and after (July to December). Figure 4 is a change chart of the coliform count of the inflow and discharge of sewage treatment plant for the treatment, according to the present invention, Figure 5 is a decrease in the amount of dehydrated cake (CAKE) generated in the sewage treatment plant during treatment, Figure 5 is from January 1 to December 2002 Figure 6 shows the results of water quality analysis for each livestock wastewater treatment plant up to 31 days, after the surplus sludge treated according to the present invention was added to the livestock wastewater treatment plant and operated by increasing the amount of livestock wastewater by 20% or more. According to the present invention, even if the sewage treatment plant surplus sludge is put into the livestock wastewater treatment plant and operated, there is almost no change in the amount of dehydration cake generated in the livestock wastewater treatment plant. Room of treatment plant Diagram showing the result that the effluent water quality is stabilized even if the quantity is increased, Figure 9 is a diagram that increases the removal efficiency of VSS (volatile solids) in the process of increasing the livestock wastewater input during treatment according to the present invention, Figure 10 Detailed view of the contaminant removal device of the present invention, Figure 11 is a detailed view of the sedimentation tank of the present invention, Figure 12 is a detailed view of the fine contaminant removal device of the present invention, Figure 13 is a detailed view of the raw water tank of the present invention, Figure 14 is Anaerobic tank and aeration tank detail view, Figure 15 shows a detailed view of the sedimentation tank of the present invention, the sedimentation basin (1), the hydraulic pump (2), the initial settler (3), the aeration tank (4, 19), the final settler (5), Thickener (6,14), dehydrator (7,15), debris removal device (8), sedimentation tank (9), fine contaminant removal device (10), raw water tank (11), bioreactor (12), sedimentation tank (13) ), A compliant tank 16, an anaerobic tank 17, an anaerobic tank 18, a sewage treatment apparatus (A) and a livestock wastewater treatment apparatus (B).

Looking at the structure, as shown in Figure 1 relates to the overall livestock wastewater treatment apparatus using the sewage treatment plant excess sludge of the present invention,

The sewage treatment apparatus (A) and the livestock wastewater treatment apparatus (B) are connected to the lower part of the final settler (5) of the sewage treatment apparatus (A) by a pipe and the compliant tank 16 of the livestock wastewater treatment apparatus (B). The supernatant of the sedimentation tank 13 of the livestock wastewater treatment device B is connected to the pipe and is connected to the sedimentation basin 1 of the sewage treatment device A so that the livestock wastewater treatment using surplus sludge in the sewage treatment plant is connected. Regarding the device, it will be described in more detail as follows.

The sewage treatment apparatus (A) is the first settling battery (3) which is connected to the sedimentation basin (1) and the sedimentation basin (1), the sedimentation basin (1) to be transferred by the hydraulic pump (2) treated in the sedimentation basin (1), Aeration tank installed on one side of the initial settler (3) is a process in which colloidal and soluble organic matter in the sewage (supernatant) passed through the first settler (3) is adsorbed and removed by the microorganisms acting in the tank to supply sufficient oxygen to the activated sludge. (4) and the final settler (5) formed on one side of the aeration tank (4) to precipitate and separate the activated sludge containing microorganisms from the mixed liquid introduced from the aeration tank (4), and the first settler (3) Concentrated tank (6) installed on the other side and the bottom of the initial settler to remove the sludge by trambling sludge remover (TRAVELLING BRIDGE TYPE) of 0.6m / min speed, and

Dehydrator 7 for adjusting the sludge introduced through the thickening tank 6 with a polymer flocculant and lowering the water content to dehydrate, and an ejector for solidifying the dewatering cake by the dehydrator 7 to take out the sludge (not shown). Wow,

The supernatant of the livestock wastewater treatment device (B) is pumped through a pipe (not shown in the drawing) for discharging the supernatant passed through the final settler (5) and a pipe formed under the final settler (5). 16) to be pumped in,

The livestock wastewater treatment device (B) is a debris removal device (8) for removing contaminants in the livestock wastewater, and a sedimentation tank (9) for sedimenting the wastewater passing through the contaminant removal device (8) by an agitator formed therein. And a fine contaminant removing device 10 formed on one side of the immersion tank 9 to remove unremoved fine solids, and installed on one side of the fine contaminant removing device 10, and fine contaminants are removed. Raw water tank (11) for storing the waste water and the supernatant of the returned concentrated tank (14), and is installed on one side of the raw water tank (11), livestock wastewater and sewage treatment plant (A) introduced from the raw water tank (11) Bioreactor 12 for mixing and treating the excess sludge of the final settler (5) of the) and the bioreaction solution that is biologically decomposed in the bioreactor 12 is installed on one side of the bioreactor 12 A settling tank 13 for introducing and separating the sludge,

It is installed on one side of the sedimentation tank (13), and the concentration of the supernatant water flowing into the raw water tank (11) to reduce the volume of the waste sludge pressurized by the pump in the sedimentation tank 13 and flows into the raw water tank (11), It is installed on one side of the thickening tank 14, and the belt press type dehydrator 15 for dewatering the concentrated sludge conveyed from the thickening tank 14, and to carry out the dewatered cake sludge from the dehydrator 15 It is composed of an unloading device (not shown).

The bioreactor 12 is a compliant tank 16, an anaerobic tank 17 provided on one side of the compliant tank 16, an anaerobic tank 18 provided on one side of the anaerobic tank 17, and the anoxic tank 18 It consists of aeration tank 19 installed on one side of the, the compliance tank 16 is installed on one side of the raw water tank 11, livestock wastewater and sewage treatment plant (A) introduced from the raw water tank (11). Mixing and processing the excess sludge of the final settler 5 of the aeration device is installed therein, and transfers the treated liquid to the anaerobic tank 17, the anaerobic tank 17 is introduced from the compliant tank 16 In order to denitrify sewage sludge and livestock waste to NO nitrate (NO3-N), an anoxic environment is built and an agitator is mixed to mix microorganisms and wastewater. Let's

The aeration tank 19 is a structure for abandoning the liquid introduced from the anoxic tank 18 to the aeration device to oxidize the treatment, and transfer the treated liquid to the settling tank 13.

9 is a diagram showing the change in livestock wastewater input and the removal efficiency of volatile solids after inputting the surplus sludge into the livestock wastewater treatment plant. / 13 days after gradually increasing the livestock wastewater input up to 100㎥ / day after 13 days was better than before the addition of excess sludge.

The analysis results of influent and treated water are as follows.

-Pre-treatment livestock wastewater flowing into the bioreactor

Input amount: 100㎥ / day, biological oxygen demand (BOD): 18,000 mg / l, chemical oxygen demand (COD): 5,000 mg / l, suspended solids (SS): 15,000 mg / l,

Total nitrogen (T-N): 2,100 mg / l, total phosphorus (T-P): 280 mg / l.

-Effluent (treated water linked to sewage treatment plant),

Discharge amount: 300㎥ / day (additional water for general use, yeocho washing water, etc.), biological oxygen demand (BOD): 30 ㎎ / ℓ, chemical oxygen demand (COD): 160 ㎎ / ℓ, suspended solids (SS): 60 ㎎ / ℓ Total nitrogen (TN): 40 mg / l, Total phosphorus (TP): 15 mg / l

FIG. 2 is a table showing daily average water quality analysis as a sewage treatment plant's 2002 water quality analysis data.

FIG. 3 is a diagram showing the reduction of the coliform colony shown in FIG. 2, which shows that the resultant coliform colony count of the final effluent is significantly reduced from the operation of the sewage treatment plant and the livestock wastewater treatment plant using surplus sludge.

4 is a view showing the result of significantly reducing the amount of dehydration cake generated in the sewage treatment plant as a result of the integrated operation (from July 2002) with the livestock wastewater treatment plant using the excess sludge in the sewage treatment plant.

FIG. 5 is a chart showing daily average water quality as a 2002 average water quality analysis data for each livestock wastewater treatment plant process.

6 is a diagram showing the result of surplus sludge in the livestock wastewater treatment plant (50 tons / day from July 2002) and increase the livestock wastewater inflow. As shown in FIG. It can be seen that stable water quality can be secured as shown in FIG.

7 is a diagram showing the amount of dehydrated cakes generated in the livestock wastewater treatment plant. Even if 50 tons / day of surplus sludge is introduced from July, there is no significant difference in the amount produced in 1-6 months. The total sludge amount in the city shows a result of decreasing.

FIG. 8 is a diagram showing 2002 experimental data (5 items: BOD [biological oxygen demand, COD [chemical oxygen demand], SS [rich substance], TN [total nitrogen], TP [total phosphorus]) of livestock wastewater treatment plant). This figure shows that stable water quality can be secured even if the livestock wastewater inflow increased from July.

9 is a view showing the VSS (volatile solids) reduction rate according to the increase in livestock wastewater input, showing that the removal efficiency of volatile solids increases when the livestock wastewater input is increased from July 2002, thereby removing organic matter in the livestock wastewater. It is understood that the efficiency is increased.

FIG. 10 is a view showing a complex treatment system for separating a small contaminant by a centrifuge and a drum screen for removing a large contaminant firstly as a processor for removing contaminants in livestock wastewater influent.

11 is a cross-sectional view of the sedimentation tank, and the liquid treated in the contaminant treatment system flows into and stays in the sedimentation tank, and is agitated by an underwater stirrer as a step before the wastewater is transferred to the fine contaminant removal device, and is operated by LT (water gauge). It is automatically fed to the fine contaminant removal device.

12 is a view showing a fine contaminant removal device is a device for reducing the inlet load of the raw water tank by removing the fine contaminants in the waste water in the immersion tank. The contaminants generated here are taken out and recycled as farm fertilizers.

FIG. 13 is a view showing a raw water tank, which is located at a stage prior to the inflow of a compliant tank, and the wastewater which has passed through the fine contaminant removal device is introduced, and the supernatant of the concentration tank is introduced and mixed by an underwater stirrer. Due to the high concentration, a lot of bubbles are generated, and pipes and nozzles are installed for defoaming.

Fig. 14 is a diagram showing an anaerobic tank and aeration tank, which is called a bioreactor, and an aerobic tank is equipped with an underwater stirrer and an aeration tank is installed to adjust and maintain an appropriate DO (dissolved oxygen amount).

15 is a view showing the sedimentation tank, the treated water passed through the bioreactor in the sedimentation tank and after a certain residence time, the supernatant is overflowed and sent to the sewage treatment plant inlet, and the sludge is transferred to the concentration tank, and part of it is transferred to the raw water tank. Consists of.

As described above, the present invention is difficult to treat due to problems such as odor due to bubble generation, ammonia gas generation, device corrosion, etc., since the bioreactor is not stabilized in a large number of domestic livestock wastewater treatment plants. As a solution to this problem, the excess sludge from the sewage treatment plant is introduced into a livestock wastewater treatment plant, followed by acclimatization, and then into a bioreactor. Experiments show that you can see the effect.

In addition, the precipitation of mixed suspended solids (MLSS) in the bioreactor was greatly improved when surplus sludge was added, and the concentration of mixed suspended solids (MLSS), which was maintained at about 6,000 to 8,000 mg / l before surplus sludge, was increased to 11,000 mg after surplus sludge. It was found that the sedimentation was well performed in the final settler even with the increase to / l. This increased the number of microorganisms present in the bioreactor by about 40% to 80% compared to the preliminary sludge injection.

As a result, the continuous sludge was added to the tank to ensure stable water quality, and the livestock wastewater treatment increased by about 20%.

The results showed that the amount of dehydrated cakes in the sewage treatment plant was reduced, the number of coliform bacteria was reduced, the dehydration cakes in the livestock wastewater treatment plant and water quality were stabilized.

In addition, sewage treatment plant surplus sludge flows into the livestock wastewater treatment plant bioreactor and stays for more than 10 days, reducing volatile solids (VSS) due to aerobic digestion and improving sludge dehydration. Will reduce the amount of dehydrated cakes produced and the total amount of dehydrated cakes generated at the livestock wastewater treatment plant.

Microsurface microorganisms were observed in the sewage treatment plant's surplus sludge under the microscope, but no microorganisms were observed in the microbial bioreactor in the livestock wastewater treatment plant. As a result, when the excess sludge is introduced into the livestock wastewater treatment plant bioreactor, relatively active microorganisms stay in the bioreactor for a long time, slowing their activity, and decomposing some microorganism cells such as surface microorganisms, thereby reducing the amount of sludge.

In addition, the present situation is that it is difficult to compost legally because the raw sludge of sewage sludge generated in the sewage treatment plant is contaminated with heavy metals.

Existing sludge in the sewage treatment plant is mixed with fresh sludge and then treated by ocean dumping, direct landfilling, incineration, etc., but direct reclamation and dumping are not possible due to strengthening regulations.

However, since there is no heavy metal contamination concern in sewage treatment plant surplus sludge and it has many useful values as compost, if it is put into the livestock wastewater treatment plant bioreactor (anaerobic tank + Munsan tank + aeration tank), the dehydration cake (CAKE) generated in the sewage treatment plant will be relatively reduced. As a result, the amount of waste is reduced, and the dehydrated cakes generated in the livestock wastewater treatment plant can be composted entirely, thus making a significant contribution in terms of resource recycling.

In addition, the livestock wastewater is difficult to comply with the legal water quality standards of legal effluents, and additional livestock waste treatment costs such as ozone contact, Fenton oxidation method, activated carbon adsorption method, etc. are increased, and the livestock wastewater treatment plant is located on the sewage treatment plant site. Since only a few places are connected and connected, the livestock wastewater treatment plant is currently being built within the sewage treatment plant site so that the biological treatment can only be performed after the biological treatment.

When a livestock wastewater treatment plant is newly established in a sewage treatment plant, when the livestock wastewater is treated using surplus sludge as in the present invention, the cost of dewatering cakes is reduced, the cost of livestock wastewater treatment is reduced, resources of surplus sludge are reduced, operating costs are reduced, Stabilization effect can be achieved.

Claims (7)

A livestock wastewater treatment method using excess sludge in a sewage treatment plant, wherein the surplus sludge generated in the sewage treatment plant is treated in a compliant tank of a livestock wastewater treatment plant. In the livestock wastewater treatment method using sewage sludge, First process (sewage treatment process) When sewage flows into the sedimentation basin (1), the inflow of sewage removes the sedimentary sediment, and the removal of the sedimentary sediment is carried out by the sedimentation lifting device and the salvaged sediment, which are devices for lifting the normal sedimentary sediment installed in the sedimentation basin. It is composed of conveying conveyor for conveying, skip hoist for carrying out, and sedimentation hopper furnace, etc., and the outlet part has a fine screen, a miscellaneous material conveying conveyor, a skip hoist and a discharging hopper, an outlet valve, etc. Is removed by The supernatant is transferred to the first settler 3 in the hydraulic pump 2 connected to one side of the settling basin 1, in which the settling sludge occurs due to free settling in the first settler 3 and 0.6 m in the bottom of the first settler 3 Sludge precipitated by the traversing bridge type sludge remover at / min speed is collected, stored in the sludge hopper, drawn out by the sludge pump and pumped to the drum screen room, and the contaminants generated in the drum screen are discharged and the filtrate is concentrated in the tank. The sludge drawing pump is operated by a motor control valve for intermittent operation of 4 papers for 10 minutes twice a day by drawing by the oil gauge and timer, and draws sludge with 97% water content. The supernatant passed through the initial settler (3) is overflowed into the aeration tank (4) installed on one side of the first settler (3), the activated sludge containing the pretreated wastewater and microorganisms introduced from the first settler (3) Mixed, the activated sludge receives the sludge precipitated from the final settler (5) described later, and always maintains a constant level. Inflow sewage is supplied with sufficient oxygen supply and mixed liquid suspended solids (MLSS) by means of aeration system composed of a separate blower and a diffuser that are not shown so that aerobic microorganisms can grow on activated sludge partially introduced from the final settler (5). It is operated by an acid-type full-aeration method, and (the equipment that supplies air is operated by installing two ROTARY BLOWER 28㎥ / min x 6,000mmAq and two regulators of 14㎥ / min x 6,000mmAq considering the deterioration of water quality. The resulting sludge is introduced into the conveying sludge pipe at the front of the aeration tank (4) and intermittently operated by the parcel water nozzle to suppress foaming by synthetic detergent in sewage). After sufficient oxygen is supplied to the activated sludge, it is introduced into the final settling battery 5 formed on one side of the aeration tank 4, In the final sedimentation cell (5) is a place for sedimentation and separation of activated sludge containing microorganisms from the mixed solution introduced from the aeration tank (4), that is, by separating the microorganisms ingested dissolved organic matter in the aeration tank (3) by gravity. The solids separated from the final settler 5 are returned to the aeration tank 4 to repeat the process of decomposing organic matters. (At this time, if the activated sludge increased by the cell material synthesis in the aeration tank 4 is not discharged to the system, the activated sludge concentration increases in the aeration tank 4 and the amount of microorganisms increases. Therefore, the balance of microorganisms and food sources is broken, which leads to deterioration of the treated water quality. Therefore, more sludge, that is, excess sludge, must be drawn out of the system.) Sewage surplus sludge drawn from the final settler (5) is introduced into the compliance tank of the livestock wastewater treatment plant, which is the next process, the supernatant of the final settler (5) is discharged through the overflowware and the outflow channel, the first settler (3) Sediment sludge formed on the other side of the initial settler (3) is installed in the bottom of the first settler to remove the sludge by a mid-type (TRAVELLING BRIDGE TYPE) sludge remover at a speed of 0.6 m / min After the sludge was introduced into the distribution tank 6, the sludge introduced through the concentration tank 6 was adjusted to a polymer flocculant in the dehydrator 7, and the water content was lowered to solidify the dewatering cake to take out the sludge. Second Process (Livestock Wastewater Treatment Process) To remove the impurities in the livestock wastewater, the wastewater removal device 8 was passed through and removed. Then, the wastewater passing through the wastewater removal device 8 was introduced into the sedimentation tank 9 to settle the wastewater by the built-in stirrer. After sedimentation by preventing the formation of the scavenger and SCUM (scum), the precipitate is removed, and the supernatant is transferred to a fine contaminant removal device 10 formed at one side of the immersion tank 9 to a horizontal continuous centrifugal dehydrator. After removing the fine solids that have not been removed Stored together with the supernatant of the concentrated tank 14 conveyed and conveyed to the raw water tank 11 installed on one side of the fine contaminant removing device 10 (the size of the capacity to store more than 1.6 days, raw water tank 11) In order to prevent sediment or scum from forming in the wastewater and to equalize the wastewater, abandonment of about 1.0㎥-air / ㎥hr should be given up.) Waste water stored in the raw water tank 11 for a predetermined period of time is transferred to the compliant tank 16 of the bioreactor 12 installed on one side of the raw water tank 11, the compliant tank 16 is the final settler of the first process When the excess sludge of (5) is introduced to maintain the mixed suspended solids (MLSS) concentration higher than 1%, it is mixed with the surplus sludge and the return sludge of the livestock wastewater treatment plant so that the remaining sludge is suitable for the livestock wastewater treatment. Aerated by the built-in aeration medium to maintain and comply with aerobic conditions, and then transferred to the anaerobic tank (17) installed on one side to create an oxygen-free environment to denitrify nitric acid (NO3-N) and to mix microorganisms and wastewater After stirring with a water stirrer (at this time intermittently internal circulation between the acclimatization tank 16 and the anaerobic tank 17 to increase the phosphorus removal efficiency), transfer to the anoxic tank 18, nitrification is generated in the anoxic tank 18 As an oxygen-free tank (18) for denitrifying nitric acid (NO3-N) to N2 gas by denitrification bacteria, an anoxic condition was formed in a long tank to stir and created anoxic conditions. When oxygen is used as the final acceptor of electrons generated when there is not enough oxygen, chemically bound oxygen such as nitrate nitrogen (NO3-N) is used as electron acceptor, so there should be no dissolved oxygen. 19) nitrate nitrate (NO3-N) is internally circulated (returned) to an anaerobic tank 18 in an amount of 300% of the inflow amount, and then transferred to the aeration tank 19 installed on one side, and then the aeration tank ( 19) is used as a carbon source in biological denitrification and oxidized by abandoning in the aeration tank (19) to remove the remaining methanol and organic substances and is installed on one side of the aeration tank (19). After being transferred to the settling tank 13, the activated mixed solution introduced into the settling tank 13 is naturally settled by a suitable residence time, and then the supernatant is linked to the sewage treatment plant from the discharge tank, or flowed into the raw water tank 11 The sludge settled in the lower part of the settling tank 13 is collected in the center and transferred to the dehydrator 15 formed on one side, and the concentrated sludge transferred to the dehydrator 15 of the belt press type is dehydrated by the dewatering machine 15 of the belt press. Livestock wastewater treatment method using excess sludge in a sewage treatment plant characterized in that it is carried out by a carrying out device (not shown). The sewage treatment plant excess sludge according to claim 1 or 2, wherein the mixed sludge solids (MLSS) concentration in the reaction tank is maintained at 1% or higher when the sewage treatment plant surplus sludge is introduced into a livestock wastewater treatment plant bioreactor. Livestock wastewater treatment method. In the livestock wastewater treatment apparatus using the sewage treatment plant surplus sludge, the sewage treatment apparatus (A) and the livestock wastewater treatment apparatus (B) are connected to the lower part of the final settling battery (5) of the sewage treatment apparatus (A) by pipes. The supernatant of the sedimentation tank 13 of the livestock wastewater treatment device B is connected to the pipe, and the supernatant of the livestock wastewater treatment device B is connected to the sedimentation basin 1 of the sewage treatment device A. Livestock wastewater treatment apparatus using excess sludge in the sewage treatment plant characterized in that the structure is connected to. The sewage treatment apparatus (A) according to claim 4, wherein the sewage treatment apparatus (A) is connected to one side of the sedimentation basin (1) into which the sewage flows, and is first transported by the hydraulic pump (2) treated at the sedimentation basin (1). Activated sludge is a process in which colloidal and soluble organic substances in sewage (supernatant) installed on one side of the sedimentation basin 3 and the initial settler 3 are passed by the microorganisms acting in the tank. Aeration tank (4) for supplying sufficient oxygen and the final settling battery (5) formed on one side of the aeration tank (4) to precipitate and separate the activated sludge containing microorganisms from the mixed liquid introduced from the aeration tank (4), and the first It is installed on the other side of the sedimentation basin (3), and the concentration tank (6) in which the sludge is removed at the bottom of the initial settler (TRAVELLING BRIDGE TYPE) sludge remover and sludge is removed. , Dehydrator 7 for adjusting the sludge introduced through the thickening tank 6 with a polymer flocculant and lowering the water content to dehydrate, and an ejector for solidifying the dewatering cake by the dehydrator 7 to take out the sludge (not shown). Wow, A supernatant tank of the livestock wastewater treatment apparatus B by a pump through a pipe (not shown in the drawing) for discharging the supernatant passed through the final settler 5 and a pipe formed under the final settler 5. 16) Livestock wastewater treatment apparatus using excess sludge in the sewage treatment plant, characterized in that the pumping structure. The method of claim 4, wherein the livestock wastewater treatment device (B) is sediment removal device (8) for removing the contaminants in the livestock wastewater and the waste water passing through the contaminant removal device (8) is settled by an agitator formed therein And a fine contaminant removal device 10 for removing fine solids formed on one side of the immersion tank 9 and the immersion tank 9 to be removed; It is installed on one side of the fine contaminant removing device 10, the raw water tank 11 for storing the waste water from which the fine contaminants have been removed and the supernatant of the concentrated concentration tank (14), and installed on one side of the raw water tank (11) On the one side of the bioreactor 12 and the bioreactor 12 for mixing and treating the livestock wastewater introduced from the raw water tank 11 and the surplus sludge of the final settler 5 of the sewage treatment plant (A) A sedimentation tank 13 which is installed and biologically decomposed bioreaction solution is introduced into the bioreactor 12 to precipitate and separate the sludge; It is installed on one side of the sedimentation tank (13), and the concentration of the supernatant water flowing into the raw water tank (11) to reduce the volume of the waste sludge pressurized by the pump in the sedimentation tank 13 and flows into the raw water tank (11), It is provided on one side of the thickening tank 14, and the belt press type dehydrator 15 for dewatering the concentrated sludge conveyed from the thickening tank 14, and to carry out the dewatered sludge dehydrated from the dehydrator (15) Livestock wastewater treatment system using excess sludge in a sewage treatment plant, characterized in that it is composed of a carrying out device (not shown). The method according to claim 4, wherein the bioreactor 12 is a compliant tank 16, an anaerobic tank 17 provided on one side of the compliant tank 16, an anaerobic tank 18 provided on one side of the anaerobic tank 17, It is composed of aeration tank 19 installed on one side of the oxygen-free tank 18, the compliance tank 16 is installed on one side of the raw water tank 11, and the livestock wastewater introduced from the raw water tank (11) and The excess sludge of the final settler 5 of the sewage treatment plant A is mixed and treated, and an aeration device is installed therein, and the treated liquid is transferred to the anaerobic tank 17, and the anaerobic tank 17 is the compliant tank ( In order to denitrify the nitrate nitrogen (NO3-N) from the sewage sludge and livestock waste introduced from 16), create an anoxic environment and mix the microbial and wastewater with an agitator. Internal circulation (return), and in the aeration tank 19, Processes oxidized to give the liquid flows from the tank 18 to the aerator, livestock waste water treatment apparatus using a sewage treatment plant excess sludge characterized in that the treatment solution structure for transferring a settling tank (13).