KR101422764B1 - Method for producing the fertilizer used the leachate of livestock burial and the fertilizer made thereby - Google Patents

Abstract

The present invention relates to a method for treating leachate generated from landfill of buried livestock due to foot-and-mouth disease or AI, fertilizing leachate of the buried leachate using bottom ash and a fertilizer produced by the method, A sterilization step of treating a strong acidic drug having a pH of not more than 4 or a strong alkaline chemical having a pH of not less than 10 to a burnt paper or a storage tank; After completion of the sterilization step, installing a suction pipe in the landfill or storage tank to extract leachate; Mixing the extracted leachate with a bottom ash to prepare a slurry; Subjecting the slurry to a secondary sterilization by heat treatment; Adding the fermenting microorganism to the sterilized slurry and mixing the same; And fermenting the slurry in which the microorganisms are mixed; and a method for producing a fertilizer using the leachate of livestock sands.

Description

TECHNICAL FIELD The present invention relates to a method for producing a fertilizer using a leachate of livestock landfill and a method for producing the fertilizer using the leachate,

The present invention relates to a method for treating leachate generated from landfill of buried livestock due to foot-and-mouth disease or AI, fertilizing the leachate of the buried ground using bottom ash, and a fertilizer produced by the method.

When animals are buried with foot-and-mouth disease or AI (avian influenza) virus, and landfilled for a long time, leachate is generated from the landfill. The resulting virus does not directly infect the human body, but there is a possibility that leachate may contain nitrate nitrogen which can cause cyanosis, anthrax causing severe sepsis, and pathogens and food poisoning bacteria.

It first occurred in Korea in 1934, and then spread to Chungcheong province in the year 2000, when it occurred in Paju, Gyeonggi province in 66 years. For example, in Andong, Gyeongsangbuk-do Province in November 2010, there were more than 4,200 livestock burial sites due to foot-and-mouth disease, and the stability of groundwater used by nearby residents became a serious problem. The Ministry of Environment surveyed 23 sites of foot-and-mouth disease and AI livestock burial that occurred between 2004 and May last year. As a result of investigating the environmental pollution, it was found that leachate leaks out from 8 sites (35%). At the same time, it was extended to 10 cities and 77 cities nationwide due to the initial failure to respond. Gimpo City has been urgently shutting down the groundwater near the site of the foot-and-mouth disease, and the Pocheon site where the foot-and-mouth disease occurred in 2009 was seemingly perfect, but the water supply was not installed, so the villagers reported anxiety about the stench and drinking water.

In 2010, the number of burials in Pocheon increased by seven times from last year to 279, and pollution from leachate has become more serious. The Ministry of Public Administration and Security (MEXT) surveyed 61 facilities in the upper stream of the Nakdong River (Gyeongbuk) and 22 in the upper stream of the Han River (Gyeonggi Province, Gyeonggi Province).

There is no way to determine what form leachate is leaking. However, there is a high possibility that leachate will contaminate groundwater and potentially pollute drinking water. Although the initial response has failed, urgent treatment is necessary before the outbreak of odor and leachate due to Taiwanese precedent and rising temperatures due to the 41 billion-dollar budget, but there is no proper measure to deal with it. Particularly, if there is secondary pollution, the barrier and reinforcement work are limited. Therefore, more environmentally friendly and economical treatment methods and measures are needed.

The UK Economic Accounts estimates that the amount of liquid from the cadaver was estimated to be 170 liters per cow per month for two months, and the US Department of Agriculture's Animal and Plant Quarantine Service estimates that the amount of leachate per cow (500 to 600 kilograms) 160L for cows and 12L for pigs. Based on this, the amount of leachate expected at only the foot-and-mouth disease area is 61.56 million liters or more. Especially, it can cause huge damage to the human body due to collapse and loss of buried land in the rainy season.

1. Korean Patent Publication No. 10-2004-0006833 (2004.01.24) "Method for producing alkaline organic fertilizer using manure sieve and sludge" 2. Korean Registered Patent No. 10-0222637 (Jul. 1999) "Fertilizer using sewage sludge sludge and fly ash and method for producing the same" 3. Korean Patent Publication No. 10-2010-0043787 (Apr. 29, 2010) "Apparatus and method for manufacturing fertilizer and liquid fertilizer using livestock manure" 4. Korean Registered Patent No. 10-0388346 (Jun. 2003) "Fertilizers made from agricultural, wastes, wastes and sludge as raw materials and their production methods"

The present invention provides a method for treating leachate generated in buried land of livestock buried due to foot-and-mouth disease or AI, and a method for fertilizing leachate of the burial ground using bottom ash.

A method of manufacturing a fertilizer using the leachate of livestock burial site of the present invention, which solves the above problems, comprises the steps of: sterilizing a first chemical with a strong acidic chemical having a pH of 4 or less or a strong alkaline chemical having a pH of 10 or more;

After completion of the sterilization step, installing a suction pipe in the landfill or storage tank to extract leachate;

Mixing the extracted leachate with a bottom ash to prepare a slurry;

Subjecting the slurry to a secondary sterilization by heat treatment;

Adding the fermenting microorganism to the sterilized slurry and mixing the same;

Fermenting the slurry containing the microorganisms;

.

Here, the slurry is characterized in that bottom ash and leachate are mixed in a weight ratio of 7: 3 to 3: 7.

Here, the secondary sterilization of the slurry is characterized by sterilization treatment at a temperature range of 50 to 150 ° C.

Here, the fermentation microorganism is characterized by using a microorganism preparation composed of an anaerobic and aerobic complex microorganism strain and an oxygen supply source.

Here, the fermentation of the slurry is characterized in that a low-temperature anaerobic strain and a low-temperature aerobic strain to which an oxygen supply source is added are subjected to a combined treatment.

Here, the fermentation step of the slurry is performed in a fermentation tank at a temperature of 20 to 40 ° C for 3 to 7 days.

In addition, the present invention provides a fertilizer produced by the above-described production method.

The present invention is based on the fact that a considerable number of livestock are buried due to foot-and-mouth disease or AI, and the possibility that the leachate generated from the buried land is likely to cause secondary pollution is enriched. Therefore, the leachate itself is fertilized It can prevent pollution, and leachate can be used as vegetable fertilizer, golf course lawn fertilizer, crop fertilizer and grain fertilizer as fertilizer having nutrients necessary for crop growth.

In addition, the present invention utilizes a bottom ash that generates several million tons per year in a thermal power plant. The bottom ash is currently being buried in a certain pond for storage, and the annual maintenance cost is several hundred billion won nationwide. By using it, annual maintenance cost can be reduced and new revenue source can be created.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram illustrating a method for producing a fertilizer using leachate of livestock burial site of the present invention. FIG.
Fig. 2 is a photograph of beans germinated before sowing prepared for evaluating the utility of the fertilizer produced by the production method of the present invention.
FIG. 3 is a photograph of pots in which germinated soybeans were planted in FIG. 2 prepared for observing the growth of soybeans germinated using the fertilizer produced according to the method of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be described in more detail with reference to the accompanying drawings.

In the present invention, a considerable number of livestock are buried due to foot-and-mouth disease or AI, and the possibility that the leachate generated from the buried land is likely to cause secondary pollution is rich. Therefore, It is.

The method of fertilizing leachate is to use bottom ash that generates several million tons per year in thermal power plant. Bottom Ash is currently being landfilled in certain ponds for storage, and annual maintenance costs nationwide reach several hundred billion won.

The bottom ash to be used in the present invention is excellent in porosity and thus has a physical property capable of absorbing a liquid or a gas. The objective of this study was to develop the bottom ash and leachate as a fertilizer after sterilization by adsorbing the leachate to the bottom ash.

The concept of producing fertilizer using the leachate of livestock burial site of the present invention, which was invented according to the development objective as described above, will be described below.

The bottom ash used in the present invention is an inorganic material having nSiO ₂ / SiO ₂ , Al ₂ O ₃ , and Fe ₂ O ₃ as main components and not significantly different from general soil components and excellent in water absorption, and is also used as a soil fertilizer.

Dispose of the leachate by inserting a suction pipe after sterilizing the first chemical treatment in the buried land or in the storage tank under pH 4 (strong acidity) or pH 10 or more (strong alkaline). The extracted leachate is mixed with the bottom ash, stabilized in the slurry state, and the mixture is subjected to the second sterilization process by heat treatment.

The fermentation microorganism is added to the second mixture at an appropriate ratio. The microorganism that is put in here is a microorganism preparation (Biotod) for the pollution of toxic chemical pollution. This microorganism preparation is characterized by comprising an anaerobic and aerobic complex microorganism strain and an oxygen source. Soil contaminated by microorganisms has a very low dissolved oxygen concentration, so it is combined with low temperature anaerobic strain and low - temperature aerobic strain added with oxygen source to increase final treatment efficiency to maximize final treatment efficiency.

If the fermented mixture is given a fermentation period for a certain period of time, it will remain in the form of corroded soil and produce environmentally friendly fertilizer such as vegetation fertilizer and crop fertilizer. Firstly, it is used as a vegetation fertilizer, and after evaluating its stability, it is expanded into application fields such as golf course lawn fertilizer, crop fertilizer and grain fertilizer in stages.

1, first, after a sterilization step of treating a strong acidic chemical with a pH of 4 or less or a strong alkaline chemical with a pH of 10 or more with a burnt paper or a storage tank, the sterilization step of the sterilization step After completion, a suction pipe is installed in the buried paper or the storage tank to extract the leachate.

And the slurry is prepared by mixing the extracted leachate with a bottom ash at a predetermined ratio. The prepared slurry is heat treated to be subjected to secondary sterilization, and the fermented microorganism is added to the secondary sterilized slurry and mixed. And fermenting the slurry in which the microorganisms are mixed.

According to the present invention, it is preferable that the slurry is mixed with the bottom ash and the leachate in a weight ratio of 7: 3 to 3: 7. If the weight ratio is exceeded, there is a problem that the leachate suffers insufficient adsorption to the bottom ash.

According to the present invention, the secondary sterilization of the slurry is preferably sterilized at a temperature ranging from 50 to 150 ° C. If it is sterilized at a temperature of less than 50 ° C, sterilization can not be performed completely. If it exceeds 150 ° C, destruction of nutrients of the fertilizer to be produced may occur.

According to the present invention, the fermenting microorganism used for the fermentation of the slurry is a microorganism preparation comprising an anaerobic and aerobic complex microorganism strain and an oxygen source.

According to the present invention, when the fermentation is performed using the microorganism preparation, there is a possibility that the oxygen supply is not performed well and that contamination is caused. The fermentation of the slurry is a combination treatment of a low temperature aerobic strain and a low temperature aerobic strain added with an oxygen source .

At this time, the microorganism preparation used or the low-temperature aerobic strain to which the low-temperature anaerobic strain and the oxygen supply source are added is not particularly limited, and the strain which has been used for the conventional fermentation is selected to be used.

According to the present invention, the fermentation step of the slurry may suitably control the temperature condition and the fermentation period depending on the growth conditions of the microorganism preparation or strain used for completing the present invention in the fermentation tank, preferably at a temperature of 35 to 45 ° C Condition for 3 to 7 days.

As described above, the fertilizer produced according to the method of manufacturing a fertilizer using the leachate of livestock embers according to the present invention can be used as a vegetation fertilizer, a golf course lawn growing fertilizer, a crop fertilizer or a cereal fertilizer.

Hereinafter, a method for producing a fertilizer using the leachate of livestock embers according to the present invention will be described in more detail with reference to preferred embodiments. However, the present invention is not limited to the embodiments described below, and can be modified in various ways without departing from the scope of the present invention.

[Example]

1. Sample Preparation

In Kyeonggi - do, the leachate was dredged from animal burial sites due to foot - and - mouth disease. The leachate was virus-sterilized primarily by pH <10 chemicals.

The leachate treated by chemical sterilization was left to stand for 24 hours in a leachate-bottom ash slurry so as to be adsorbed to the bottom ash (completely dried) from the thermal power plant and dried naturally.

The naturally dried leachate-bottom ash mixture was subjected to a secondary sterilization process at 50 ± 5 ° C and 100 ± 5 ° C, respectively. The final tertiary mixture was prepared by adding 0%, 3%, 6%, and 9% of corroded soil to the mixture subjected to the second sterilization process, followed by fermentation for 24 hours, and then prepared as a vegetable intestinal fertilizer of soybean 1)

2. Test method

1) Ignition of soybean

The beans are bred in Petri Dish for three days (see Figure 2).

2) Mixing ratio (weight ratio) and sowing

In order to observe the growth of the soybean, a pot as shown in FIG. 3 was prepared. The conditions of each pot were as shown in Table 1 below, and germinated soybeans as shown in FIG. 2 were planted in the prepared pot.

number Pot NO. Mixing ratio (%) Weight (g) Temperature treatment Repeat 3 times ISF mold ISF mold One 1000LT 100 0 240 0 Low temperature 3 2 973LT 97 3 232.8 7.2 Low temperature 3 3 946LT 946 6 225.6 14.4 Low temperature 3 4 919LT 919 9 218.4 21.6 Low temperature 3 5 1000HT 100 0 240.0 0 High temperature 3 6 973HT 97 3 232.8 7.2 High temperature 3 7 946HT 94 6 225.6 14.4 High temperature 3 8 919HT 91 9 218.4 21.6 High temperature 3

<Note> ISF specific gravity: 0.8, corroded soil: 0.31

- Inorganic Siliceous Fertilizer (ISF): silicate fertilizer

- LT (Low Temperature): low temperature treatment, HT (High Temperature): high temperature treatment

- Cortex: Microbial catalytic material

3) Indoor management

- Observe the growth of soybean in artificial soil mixed with ISF and compost for 30 days.

- Transfer sample sterilized at low temperature and high temperature to each port.

- Soybeans used for sowing use soybeans (average root length 0.5 ~ 0.7cm).

  Sow three beans in each port.

- After seeding the first soybean in the pot, 20ml of water is supplied and then 10ml / day is supplied.

  Keep the room temperature at 25 ° C for 24 hours (turn on fluorescent light for 24 hours).

- Perform three repeated experiments on all samples.

3. Measurement

- Observe the growth process with the naked eye and leave a photograph.

- Measure T-P (total phosphoric acid), T-N (total nitrogen), pH change.

- Determine the number of soybeans grown per POT, length (cm) of growth, and dry weight (g).

4. Results

< Changes in Phosphoric Acid, Nitrogen, pH and Dry Weight>

The measured values of T-P and T-N were higher in the test than in the control. The T-P and T-N values of the 3% composted soil samples were higher than those of the 6% and 9% composted soil samples. This is because it was absorbed as nutrients during soybean growth in 6% and 9% test groups with high soybean growth rate.

Table 2 shows the results of measurement of total phosphoric acid, Table 3 shows the result of measuring total nitrogen, Table 4 shows changes in pH, and Table 5 shows the results of measurement of change in dry weight. Here, the target of the change in total phosphoric acid, total nitrogen, pH and change in dry weight was the tertiary mixture (leachate + Bottom Ash + corroded soil).

T-P High temperature treatment (HT)
(ppm) Low temperature treatment (LT)
(ppm) ISF1000 138.0 92.5 ISF973 194.5 128.5 ISF946 160.5 154.0 ISF919 145.0 121.5

T-N (LR) High temperature treatment (HT)
(ppm) Low temperature treatment (LT)
(ppm) ISF1000 95 140 ISF973 310 325 ISF946 690 735 ISF919 450 330

pH High temperature treatment (HT)
(ppm) Low temperature treatment (LT)
(ppm) ISF1000 10.90 10.73 ISF973 10.03 9.71 ISF946 9.45 9.19 ISF919 8.95 8.71

Dry weight High temperature treatment (HT)
(ppm) Low temperature treatment (LT)
(ppm) ISF1000 X X ISF973 X 1.3037 ISF946 0.3951 2.1940 ISF919 1.1127 3.5167

X: Not measurable due to not growing at all

As a result, the pH of the sample decreased due to the organic acid, which is the final byproduct of the microorganisms present in the compost soil. The organic acids generated in the compost soil showed the essential elements and trace elements such as phosphoric acid, potassium, calcium, It can be easily absorbed as a nutritive element of crops by forming lactic acid compounds by dissolving magnesium, sulfur, iron, zinc, manganese and copper easily in the ionized form, .

Overall, the seeds were observed to be culling in the test area, which appears to be waning due to depletion of nutrients (especially carbon).

Therefore, it is considered that the silicate fertilizer produced by the above method is highly likely to be an eco-friendly fertilizer.

<Growth of soybean>

1) Number of growing soybeans per POT

-. Soybean was not recovered in the control which was sterilized at 100 ℃. The soybean was not recovered even when 3% of corroded soil was added to the control treated at 100 ℃. When 6% of corroded soil was added, one soybean was recovered. In addition, 3 soybean could be recovered from the control when 9% of the soil was added. As a result, soybeans can not be recovered from samples sterilized at 100 ° C, but a minimum amount of soybeans can be recovered by adding a large amount of soil. This seems to be caused by the oxidation of organic matter, which is a nutrient in the sterilization process.

-. In the control which was sterilized at 50 ℃, soybean could not be recovered when no carcass was added. However, the recovery rate of soybeans was high when the input amount of corroded soil was 3%, 6%, and 9%. 5% in 3%, 6 in 6%, and 9 in 9%. This seems to be due to the persistence of organic matter, which is a nutrient, in pasteurization treatment.

Table 6 below shows the results of observing the number of growing soybean per pot.

Port number 0 One 2 Three Sum ISF1000HT 1-1 ◎ - - - 0 1-2 ◎ - - - 1-3 ◎ - - - ISF973HT 2-4 ◎ - - - 0 2-5 ◎ - - - 2-6 ◎ - - - ISF946HT 3-7 ◎ - - - One 3-8 ◎ - - - 3-9 - ◎ - - ISF919HT 4-10 - ◎ - - Three 4-11 - ◎ - - 4-12 - ◎ - - ISF1000LT 5-13 ◎ - - - 0 5-14 ◎ - - - 5-15 ◎ - - - ISF973LT 6-16 - - ◎ - 5 6-17 - - ◎ - 6-18 - ◎ - - ISF946LT 7-19 - ◎ - - 6 7-20 - - - ◎ 7-21 - - ◎ - ISF919LT 8-22 - - - ◎ 9 8-23 - - - ◎ 8-24 - - - ◎

2) Root and stem growth

-. Growth of soybean in control treated at 100 ℃ was not root and stem growth. Even with 3%, 6%, and 9% of corroded soil, the roots and stem growth of soybeans were hardly developed. This result is also due to the organic nutrients being oxidized during the temperature sterilization process.

-. Growth of soybean in control treated at 50 ℃ was much better than control at 100 ℃. The growth of beak and stems was not improved when no corroded soil was added, but when the amount of corroded soil was 3%, 6%, and 9%, the growth was better. It is believed that organic matter remained at low temperatures and could have helped to activate the soil. Therefore, it has been revealed that the sterilization treatment temperature should be high temperature treatment (100 ° C) and low temperature (50 ° C).

Table 7 shows the result of observing the soybean length.

division Port number 1 iteration 2 iterations 3 iterations stem Root stem Root stem Root ISF1000HT 1-1 0 0 0 0 0 0 1-2 0 0 0 0 0 0 1-3 0 0 0 0 0 0 ISF973HT 2-4 0 0 0 0 0 0 2-5 0 0 0 0 0 0 2-6 0 0 0 0 0 0 ISF946HT 3-7 0 0 0 0 0 0 3-8 0 0 0 0 0 0 3-9 0 0 6.4 0 0 0 ISF919HT 4-10 0 0 0 0 5.2 0 4-11 4.3 0 0 0 0 0 4-12 0 0 3.0 0 0 0 ISF1000LT 5-13 0 0 0 0 0 0 5-14 0 0 0 0 0 0 5-15 0 0 0 0 0 0 ISF973LT 6-16 21.7 4.5 0 0 2.3 0 6-17 0 0 20.6 0 5.6 0 6-18 3.4 0 0 0 0 0 ISF946LT 7-19 2.9 0 0 0 0 0 7-20 2.11 0 23.8 9 30.6 6 7-21 0 0 47.2 7 37.6 0 ISF919LT 8-22 8.8 4.2 3.5 0 7.3 5 8-23 3.5 0 20.6 10.8 41 7.5 8-24 36 7 27.1 4.5 32 2.8

As a result of the experiments shown above, the following conclusions can be drawn.

-. As of 2010, the number of leachates (eg foot-and-mouth disease) from animal littering sites was 15% in the case of cattle in 10 cities and municipalities, 4.5% in total cattle and 32.3% in total pigs. Of the total number were 4365. The landfill leachate is a serious concern about environmental pollution such as drinking water source and odor, and it has been found that the quality of life of residents near the buried site has a huge adverse effect.

-. The method of treatment of wastewater after enrichment of leachate with strong alkalis, the method of clogging the surrounding soil to prevent inflow of rainwater and preventing the odor from being generated, the method of sending sawdust to the incinerator, and the method of minimizing the formation of leachate Methods for natural purification, and methods for treating leachate in a manure disposal plant are under development.

-. The sterilization temperature of the bottom ash which absorbed animal littering leachate was effective at low temperature. The growth (number, length, dry weight) of soybean was very good when mixed with low temperature treated bottom ash silicate fertilizer and 6 ~ 9% of microorganism.

-. Total nitric acid (T-N) and total phosphoric acid (T-P) values were found to absorb much nutrients during soybean growth when low temperature sterilization and corrosion microbes were mixed. At this time, it was confirmed that the pH value was lowered. The dry weight of soybean was highest when the bottom ash was treated with low temperature sterilization and corrosion microorganisms.

-. Bottom Ash is very useful as an environmentally friendly fertilizer when it absorbs leachate from animal litter and mixes with corrosive microorganisms. In conclusion, when leachate is developed as a fertilizer using inorganic sorbents, it is an environmentally friendly method that can recycle 100% of leachate itself and treat it in large quantities.

Claims (7)

A sterilization step of treating a strong acidic drug having a pH of not more than 4 or a strong alkaline chemical having a pH of not less than 10 to a burnt paper or a storage tank;
After completion of the sterilization step, installing a suction pipe in the landfill or storage tank to extract leachate;
Mixing the extracted leachate with a bottom ash to prepare a slurry;
Subjecting the slurry to a secondary sterilization by heat treatment;
Adding the fermenting microorganism to the sterilized slurry and mixing the same;
Fermenting the slurry containing the microorganisms;
Wherein the leachate containing the leachate is a mixture of leachate and leachate.
The method according to claim 1,
Wherein the slurry is mixed with bottom ash and leachate at a weight ratio of 7: 3 to 3: 7.

The method according to claim 1,
Wherein the secondary sterilization of the slurry is carried out at a temperature in the range of 50 to 150 占 폚.
The method according to claim 1,
Wherein the fermentation microorganism is a microorganism preparation comprising an anaerobic and aerobic complex microbial strain and an oxygen source.
The method according to claim 1,
Wherein the fermentation of the slurry is a combination treatment of a low temperature aerobic strain and a low temperature aerobic strain to which an oxygen source is added.
The method according to claim 1,
Wherein the fermentation step of the slurry is performed in a fermentation tank at a temperature of 20 to 40 DEG C for 3 to 7 days.
A fertilizer produced using the leachate of livestock litter, which is produced by the production method of any one of claims 1 to 6.

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