KR20210103073A - Purification system for animal carcass disposal sites using oxygen supersaturated leachate cycle - Google Patents

Abstract

The present invention relates to a leachate zero-discharge purification system without discharge of leachate, which purifies the leachate by supplying and circulating pure oxygen to the leachate contaminated with livestock burial sites without releasing the same to the outside, accelerates the decomposition of dead bodies and reduces odors. The system includes: a buried part in which an accommodating space in which livestock is buried is formed; a barrier wall provided on the inner surface and the bottom surface of the buried part; a pumping part pumping up the leachate inside the buried part; an oxygen dissolver for supplying oxygen to the pumped leachate; and an injection unit that injects oxygen-supplied leachate to the buried part.

Description

[0001] Purification system for animal carcass disposal sites using oxygen supersaturated leachate cycle.

The present invention relates to a non-discharge purifying system for leachate, and more particularly, to leachate-free leachate that supplies pure oxygen to leachate contaminated with livestock burial sites and circulates it without discharging it to the outside to purify the leachate, promote decomposition of carcasses, and reduce odor It is about the purification system.

In recent years, as the livestock industry of cattle, pigs and chickens develops, livestock farms and farms are improving the environment or performing vaccinations in livestock farms and farms to protect livestock from various infectious diseases. is occurring frequently.

In particular, in Korea, livestock infections caused by highly contagious pathogens such as Avian Influenza (AI), Transmissible Spongiform Encephalopathy (TSE), and Foot and Mouth Disease (FMD) frequently occur. Therefore, various studies on the method of stamping out livestock infected with highly contagious pathogens are being conducted.

Conventionally, the method of excavating the ground and simply water-watering the bottom and slopes, putting livestock carcasses or organic wastes in it, and burying them with soil is used, but nitrogen generated from the formed burial site (landfill site) The leachate containing a large amount of nutrients such as phosphorus and phosphorus flows out, causing eutrophication of rivers and groundwater, and various environmental problems such as contamination by pathogenic microorganisms.

Korean Patent Publication No. 10-1032605, 'Eco-friendly bin for disposing of dead or slaughtered livestock' is a bin that is buried underground by attaching a pipe for discharging gas and leachate to the synthetic resin bin containing dead livestock. However, due to the lack of air circulation, the decomposition rate of the carcass is slow, and there is a problem that odor and gas are continuously generated while the carcass is decomposed.

The present invention has been devised to solve the above-mentioned environmental problem, by pumping contaminated leachate, supplying pure oxygen to the leachate pumped in a pumping well, and rapidly using an in-line mixer type dissolver. It is intended to provide a non-discharge purification system for leachate that promotes decomposition of dead bodies and reduces odors by purifying and circulating the leachate within the purification system after increasing the oxygen concentration.

The leachate non-discharge purification system according to a preferred embodiment of the present invention includes: a buried part (1) having an accommodation space in which livestock is buried, and recessed to a predetermined depth in the ground; an order wall 10 provided on an inner surface and a bottom surface of the buried part 1; a pumping part 20 for pumping the leachate from the inside of the buried part 1; an oxygen dissolver 30 for supplying oxygen to the leachate pumped from the pumping unit 20; and a spraying part 40 for spraying the leachate supplied with oxygen through the oxygen dissolver 30 to the upper part of the buried part 1, wherein Z of one side of the buried part 1 is the opposite Z' of the other side. By forming a longer length and forming an inclination, the leachate can be collected below the Z.

At this time, the pumping unit 20 is provided on the Z side, the pipe 21 forming a flow path to the oxygen dissolver 30 and the Z side, a water level sensor 22 for measuring the level of the leachate and a pump 23 provided between the pipe 21 and the oxygen dissolver 30 to pump the leachate, and a gas outlet 24 provided above the pipe 21 and discharging harmful gases to the outside. In addition, the pump 23 may pump the leachate when the level of the leachate measured by the water level sensor 22 is greater than or equal to a preset water level.

In this case, the spraying part 40 may be provided with a plurality of nozzles in a radial shape to evenly spray the leachate onto the top of the buried part.

The leachate zero-discharge purification system according to a preferred embodiment of the present invention injects high-concentration oxygen into leachate in an anaerobic state and dissolves it immediately in an in-line mixer type dissolver. There is no need, and the leachate in an anaerobic state is immediately converted into an aerobic state, and the aerobic state is gradually improved as the number of cycles is repeated, thereby preventing the odor problem in advance.

In addition, by rapidly decomposing livestock carcasses using leachate and microorganisms with a high dissolved oxygen content by injecting oxygen, it is possible to greatly reduce the management period after the slaughter of livestock.

In addition, the problem of contamination of surrounding soil and groundwater can be prevented by circulating and purifying the contaminated leachate in the purification system without discharging it to the outside.

And the effects obtainable from the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. There will be.

1 is a cross-sectional view of a leachate non-discharge purification system according to an embodiment of the present invention.
2 is a flow chart of the leachate in the leachate non-discharge purification system according to an embodiment of the present invention.
3 is a plan view of an injection unit of the leachate non-discharge purification system according to an embodiment of the present invention.
4 is a graph showing the results of removal of dissolved organic matter and ammonia by supersaturated oxygen cycle.
5 is a graph showing the results of removing the complex odor of pig wrath by the supersaturated oxygen dissolver.
6 is a graph showing that the oxygen concentration is increased by the oxygen dissolver in the form of an in-line mixer.

Hereinafter, with reference to the accompanying drawings, the configuration and operation according to the embodiment of the present invention will be described in detail. The following description is one of several aspects of the present invention that is claimable, and the following description may form a part of the detailed description of the present invention. However, in describing the present invention, detailed descriptions of known configurations or functions may be omitted for clarity of the present invention.

Since the present invention may include various embodiments and various modifications, specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to a specific embodiment, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In addition, terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various components, but the components are not limited by these terms. These terms are used only for the purpose of distinguishing one component from another. When it is said that a component is 'connected' or 'connected' to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in between. it should be The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

1 is a cross-sectional view showing the overall configuration of a leachate non-discharge purification system (hereinafter, referred to as a 'purification system') according to an embodiment of the present invention.

Referring to Figure 1, the purification system of the present invention burying a livestock carcass in the ground, by rapidly decomposing the buried carcass to minimize odor and gas generation, and to purify the environment by circulating and purifying the leachate in the purification system. This device is provided for the purpose of preventing

The purification system according to a preferred embodiment of the present invention includes: a burial part (1) having an accommodation space in which livestock is buried, and recessed to a predetermined depth in the ground; a barrier wall (10) provided on the inner surface and the bottom surface of the buried part (1) and made of rubber or PVC (Polyvinyl chloride) material to prevent damage due to the movement of livestock; a pumping part 20 for pumping the leachate from the inside of the buried part 1; an oxygen dissolver 30 for supplying oxygen to the leachate pumped from the pumping unit 20; and an injection unit 40 for spraying the leachate supplied with oxygen through the oxygen dissolver 30 to the upper portion of the buried unit 1 .

In addition, when the operation of the purification system continues to increase the amount of leachate and the water quality is improved, a discharge unit (not shown) for discharging the purified leachate to the outside; and a pollutant concentration for measuring the contamination level of the pumped leachate It may further include; a control unit (not shown) including a sensor.

In this case, the pumping unit 20 includes two flow paths (not shown) through which the leachate flows to the injection unit 40 or the discharge unit. The opening and closing will be regulated.

More specifically, when the contaminant concentration of the leachate measured by the contaminant concentration sensor is less than or equal to a preset concentration value, the control unit closes the flow path on the side of the spray unit 40 and opens the flow path of the discharge unit to discharge the purified leachate to the outside. can be discharged with

In this case, it is preferable that the discharge unit is provided at the front end of the oxygen dissolver 30 , and the contaminant concentration sensor is provided below the buried unit 1 .

The buried part 1 may be configured to have a structure in which the upper part is sealed through an opening/closing device to be blocked from the outside, and may be configured in various shapes such as a rectangular box or a cylindrical structure.

In addition, as shown in FIG. 1 , one side Z of the buried part 1 has a longer length than that of the other side Z′ facing it to form an inclination, so that the leachate can be collected under the Z side.

In this case, the lower surface of the buried part 1 may be manufactured in a V shape to collect the leachate in one place and pump it easily.

The pumping unit 20 includes a pipe 21 forming a flow path through which the leachate flows from the lower side of the Z side of the buried unit 1 to the oxygen dissolver 30, and is provided at the lower side of the Z side and includes the pipe ( 21) A water level sensor 22 for measuring the level of the internal leachate, a pump 23 provided between the pipe 21 and the oxygen dissolver 30 to pump the leachate, and an upper side of the pipe 21 and may further include a gas outlet 24 for discharging harmful gases to the outside.

At this time, the outlet of the gas outlet 24 may be provided with an outlet hole through which harmful gas can be discharged, and a filter for blocking the inflow of external insects and insects.

In addition, the rear end of the pump 23; a water supply unit (not shown) to which water is supplied from the outside; may be further included, the water supplied by the water supply unit receives oxygen along with the leachate, and the buried unit (1) It can be rapidly decomposed by immersing livestock carcasses in water and leachate with high dissolved oxygen (DO).

FIG. 2 is a flow chart of the leachate in the purification system according to an embodiment of the present invention. Referring to FIG. 2 , the pump 23 indicates that the level of the leachate in the pipe 21 measured by the water level sensor 22 is a preset water level. When it is abnormal, the leachate is pumped.

The oxygen dissolver 30 located at the rear end of the pump 23 forcibly dissolves oxygen in the pumped leachate to a supersaturated state to increase the dissolved oxygen amount, and the oxygen dissolved leachate (hereinafter referred to as 'oxygen water') is transferred to the injection unit 40 , and the injection unit 40 injects the oxygen water to the upper portion of the buried unit 1 .

At this time, as shown in FIG. 3 , the spraying part 40 may be formed in a radial shape to spray evenly on the upper part of the buried part 1 .

division Item (mg/L) BOD COD TN TP NO ₃ -N NH ₃ -N CI ^- TOC saliva
out
Number 1 week 52,800 13,464 10,464 426.9 non-detection 962.25 1,991 31,200 4 weeks 45,900 14,256 9,744 214.9 non-detection 1,961.67 2,249 23,300 Week 6 102,600 45,100 15,080 596.91 non-detection 2,335.5 1,750 35,400

Table 1 shows the results of experiments conducted by the Korea Atomic Energy Research Institute. In the case of the 6th week leachate, BOD was about 1,000 times that of general sewage, nitrogen was 500 times, and a large amount of oxygen was required for aerobic decomposition.

4 is a graph showing the results of removal of dissolved organic matter and ammonia from food wastewater by a supersaturated oxygen dissolver.

Referring to FIG. 4, when the oxygen supersaturation method by the oxygen dissolver 30 is applied to high concentration wastewater and the DO concentration is maintained at 30 mg/L or higher for 5 days, SCOD is 88% and ammonia is 99.9% removal rate seemed

5 is a graph showing the results of removing complex odors from pig manure by a supersaturated oxygen dissolver.

Referring to FIG. 5, when oxygen disslover is an oxygen supersaturation method, and when the oxygen supersaturation method by an oxygen dissolver is applied to high-concentration wastewater and circulated at all times, it can be confirmed that more than 99% of the complex odor is removed after 10 days. .

6 is a graph showing that the oxygen concentration is increased by the oxygen dissolver of the in-line mixer type.

Referring to FIG. 6 , when circulating water in an anaerobic state having an oxygen concentration of 0 for 1 hour, it can be seen that the oxygen concentration is increased by 40 ppm or more.

Dissolving the oxygen concentration above the saturation concentration of 9.08 ppm under 20 degrees Celsius and 1 atm is called supersaturation dissolution, and the purification system is characterized by using a serial mixer capable of supersaturation and dissolution without a separate structure and residence time.

It can be seen from FIG. 6 that the conventional air aeration method has a disadvantage in that supersaturated dissolution of oxygen is impossible.

In this way, when the dissolved oxygen in the buried part 1 is maintained at a certain level or more by the oxygen supersaturation method, organic matter and ammonia can be effectively removed, and the anaerobic state inside is changed to an aerobic state, so there is no odor. can make

Looking at the stratum of the buried part 1 for purifying the leachate and decomposing the carcass with reference to FIG. 1 , the first gravel layer laminated on the bottom surface of the buried part 1 and the first gravel layer are laminated on the upper surface, A second gravel layer having larger particles, a quicklime layer laminated on the upper surface of the second gravel layer to kill harmful viruses, a third gravel layer laminated on the upper surface of the quicklime layer, and a carcass buried layer laminated on the upper surface of the third gravel layer; A decomposition layer made of sand and microorganisms stacked on the upper surface of the cadaver burial layer, a first soil layer stacked on the upper surface of the decomposition layer, an activated carbon layer stacked on the upper surface of the first soil layer, and a second layer stacked on the upper surface of the activated carbon layer It may consist of a layer of soil.

In this case, the activated carbon layer is preferably made of powdered activated carbon having good odor removal and adsorption rate.

In addition, the section of the first soil layer to the second soil layer may be made of zeolite or slag.

In this way, after the oxygen water sprayed to the upper part of the buried part 1 undergoes physicochemical purification processes such as filtering and adsorption in the first to second soil layer sections, the decomposition layer and the dead body buried layer together with microorganisms It can decompose the body quickly.

And the harmful virus is killed in the quicklime layer, passes through the first gravel layer and the second gravel layer, is transferred to the injection unit 40 through the pumping unit 20, and will be sprayed on the top of the buried unit 1 again.

As such, the purification system of the present invention can contribute to the decomposition mechanism by filtering and adsorbing solid substances, organic substances, ionic substances, etc. present in the leachate in the buried part 1, and can reduce the management period by rapidly decomposing livestock carcasses. And by converting to aerobic state, the odor problem can be prevented.

In addition, it is possible to prevent soil and groundwater contamination problems by not discharging contaminated leachate to the outside.

In the above, the present invention has been described in detail using examples, but this is merely an example, and the present invention is not limited thereto, and it should be construed as having the widest scope according to the basic idea disclosed in the present specification. A person skilled in the art may implement a pattern of a shape not indicated by combining/substituting the disclosed embodiments, but this also does not depart from the scope of the present invention. In addition, those skilled in the art can easily change or modify the disclosed embodiments based on the present specification, and it is clear that such changes or modifications also fall within the scope of the present invention.

1: buried part
10: water barrier
20: amniotic part
21: plumbing
22: water level sensor
23 : pump
24: gas outlet
30: oxygen dissolver
40: injection part

Claims (3)

A receiving space in which livestock is buried is formed, the buried part is formed to be recessed to a predetermined depth in the ground;
an order wall provided on the inner surface and the bottom surface of the buried part;
a pumping part pumping up the leachate inside the buried part;
an oxygen dissolver for supplying oxygen to the leachate pumped by the pumping unit; and
Including; a spraying unit that sprays the leachate supplied with oxygen through the oxygen dissolver to the upper part of the buried part;
The leachate non-discharge purification system, characterized in that one side Z of the buried part is formed longer than the opposite side Z' to form an inclination, so that the leachate is collected under the Z. The method according to claim 1,
The amniotic unit,
a pipe provided on the Z side and forming a flow path to the oxygen dissolver;
a water level sensor provided on the Z side and measuring the level of the leachate;
a pump provided between the pipe and the oxygen dissolver to pump the leachate;
It is provided on the upper side of the pipe and includes a gas outlet for discharging harmful gas to the outside,
and the pump pumps out the leachate when the level of the leachate measured by the water level sensor is above a preset water level. 3. The method according to claim 2,
The spray unit,
The leachate non-discharge purification system, characterized in that a plurality of nozzles are provided in a radial shape to evenly spray the leachate on the upper part of the buried part.

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