KR101180380B1 - Method for Preparing of Fertilizer Using Carcass and Shell - Google Patents

Abstract

PURPOSE: A manufacturing method of fertilizer using livestock carcass and shells is provided to increase water-soluble calcium content and inorganic nutrition element content. CONSTITUTION: A manufacturing method of fertilizer using livestock carcass and shells comprises the following steps: preparing livestock carcass liquid solution by acid hydrolysis using livestock carcass; preparing shell powder; mixing 30-70mil of the livestock carcass liquid solution per 100g of the shell powder; and adjusting the outcome of the previous step as 10-40% of water content by drying the outcome at room temperature. In the first step, 60-70ml of 6N hydrochloric acid solution is added per 100g of livestock carcass. The acid hydrolysis reaction is processed at 100 deg. Celsius for 5 hours. The livestock carcass in the first step is selected from cattle, sheep, goat, horse, pig and domestic fowls. The shell powder of the second step is oyster shell powder or shell powder.

Description

Method for Preparing Fertilizer Using Carcass and Shell}

The present invention relates to a method for producing fertilizers that are environmentally friendly and have high soil improvement (soil physical, chemical and biological) effects as well as neutralization of livestock carcass liquefaction solutions prepared by acid hydrolysis.

Recently, foot-and-mouth disease of livestock transmission pathogens in Korea (November 2010-February 2011) occurred in 11 cities and 11 cities and districts in Korea, killing about 346 million livestock such as cattle and pigs. A total of 330,000 pigs, 33% of the total number of pigs (98.000 million), and 150,000 (4.5%) of the 3.33 million were buried, killing about 30% of Korea's stock. Direct damage from foot-and-mouth disease has already exceeded 3 trillion won. It is estimated that the reduction in production of related industries will also be trillion won. Foot-and-mouth disease also caused secondary damages such as environmental pollution and soaring food prices.

In recent years, due to the spread of livestock epidemics such as avian influenza (AI) and foot-and-mouth disease (FMD), each country has a social burden directly related to economic loss and the health of the people. Accordingly, the World Organization for Animal Health (OIE) manages quarantine and disease transmission based on livestock epidemics reported from around the world every year. The number of livestock epidemics registered with the OIE was 118 in 2008, targeting a wide variety of cattle, sheep, goats, horses, pigs, poultry, bees and other livestock. In Korea, 64 kinds of animal infectious diseases are announced in the Ministry of Food, Agriculture, Forestry and Fisheries, which includes 15 kinds of livestock infectious diseases, 31 kinds of livestock infectious diseases, and 18 kinds of livestock infectious diseases.

At present, the treatment methods according to the outbreak of various infectious diseases on livestock in Korea include incineration, burial, rendering, composting, and alkaline hydrolysis.

Although burial is convenient in that it is less expensive and can bury animal carcasses in the ground immediately to prevent the spread of viruses, it has a fatal flaw, called environmental pollution. Securing the investment site is very likely to occur and various civil complaints are generated by the investment. In addition, continual management of the burial site should be maintained, with pessimistic views on the feasibility. In the absence of long-term data on the effects of landfills that are inevitably arising from killing landfills, it is necessary to provide fundamental measures or alternatives.

Incineration methods are not free from problems that cause other environmental damage. First of all, the burden of processing costs is high, and there is a limit to removing harmful gases such as dioxins generated in the process of incineration of carcasses. First of all, it has to be moved to an incinerator, so there is a risk of spreading the virus, and the incineration involves the drying process. The purification method is sterilized and dried, and the fat components generated during sterilization must be treated separately, and there is a disadvantage in that the carcass water retention rate (water content) cannot be lowered if sufficient heating time is not secured.

Carbon ratio varies slightly depending on the type of livestock, but averages 5-12 and moisture is 70-80%. For the composting of livestock, the physical and chemical properties must be improved by depositing and mixing subsidiary materials. If the carbon ratio is too low, odor is generated. If it is too high, the decomposition rate and compost temperature are low. If moisture is low, decomposition rate and compost temperature are low, and if moisture is high, odors and flies are generated. If the porosity is high or low, the compost temperature and decomposition rate are low and odor, and if high, organic decomposition rate and compost temperature are low. In addition, the temperature is difficult to maintain more than three days as 55 for the killing of pests, etc. First of all, it is impossible to compost the livestock carcasses dead due to infectious diseases.

Treatment of livestock carcasses by simply incineration, landfilling, etc. has caused environmental problems, and in recent years has been seeking ways to recycle them.

The more hygienic and safe treatment of livestock carcasses is by hydrolysis. Hydrolysis is largely hydrolyzed by enzymes and treated with alkaline and acidic solutions. Enzyme method is very specific and has the advantage of ensuring a high yield, but the pretreatment process of the raw material is required and there is a disadvantage that the process cost is increased due to the expensive enzyme price. Moreover, it is not desirable for mass production except in the case of the production of commodity which requires a long time and good quality because of complicated reaction process. The chemical hydrolysis method using alkaline solution is capable of decomposing the hair and lean part of the livestock, but the resolution of the bone is not very high, and has a strong basic characteristic, which makes it difficult to recycle.

The acid hydrolysis process can be classified into high acid-low temperature process and low concentration-high temperature process. When high concentration acid is used, the reaction occurs at low temperature (100-150 ° C). Clean hydrolyzate can be obtained, and the treatment cost is relatively inexpensive. However, there is a disadvantage that the cost required for acid regeneration or neutralization is not small.

Oyster production has been rapidly increased due to the recent development of oyster farming methods, which contributes to the income improvement of fishermen.However, oyster shells, which are by-products, have also been generated, and about 10% of the shells generated are recycled as resources. The rest is being handled by illegal coastal landfilling, coastal dumping, etc.

It is true that the evaluation of oyster shell as a farming material in farmhouses is very negative in recent years. The reason is that the calcium in the oyster shell is composed mostly of calcium carbonate, so its solubility in water is very low and the fertilizer absorption effect of calcium and minerals is much lower than expected in the growing process of crops.

1. Kye-Hoon Kim, Hyuk-Soo Kim 2011. Evaluation and Suggestion of Aftercare Management Measures for Livestock Carcass. Korean Society of Environmental Agriculture Spring Workshop, pp.27-57. 2. Eui-Sang Lee 2001. Characteristics of Acid Hydrolysis of Starch and Fibrin, Sangmyung University Institute of Industrial Sciences No. 11, pp. 1-8.

The present inventors endeavored to develop fertilizers that are environmentally friendly and have high soil improvement (soil physical, chemical and biological) effects as well as neutralization of livestock carcass liquefaction solutions prepared by acid hydrolysis. As a result, the fertilizer was prepared by adding a liquefied solution of livestock carcasses to the shell powder. As a result, the pH value was lowered so as not to cause acidification of the soil, and the contents of inorganic nutrients such as nitrogen, organic matter, and phosphoric acid were increased. By increasing the content of water-soluble calcium than the poorly soluble calcium of the shell powder, increasing the content of replaceable calcium, by confirming that it can be used as an environmentally friendly fertilizer, the present invention was completed.

Accordingly, it is an object of the present invention to provide a method for preparing fertilizer.

Another object of the present invention is to provide a fertilizer produced by the method of the present invention described above.

Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention, claims and drawings.

According to one aspect of the invention, the present invention provides a method for producing a fertilizer comprising the following steps: (a) preparing a livestock carcass as a livestock carcass liquefaction solution by acid hydrolysis; (b) preparing a shell powder; (c) adding and mixing 30-70 ml of livestock carcass liquefaction solution of step (a) per 100 g of shell powder of step (b); And (d) drying the resultant of step (c) at room temperature to adjust the water content to 10-40%.

The present inventors endeavored to develop fertilizers that are environmentally friendly and have high soil improvement (soil physical, chemical and biological) effects as well as neutralization of livestock carcass liquefaction solutions prepared by acid hydrolysis. As a result, the fertilizer was prepared by adding a liquefied solution of livestock carcasses to the shell powder. As a result, the pH value was lowered so as not to cause acidification of the soil, and the contents of inorganic nutrients such as nitrogen, organic matter, and phosphoric acid were increased. It was confirmed that the water-soluble calcium content of the shell powder was higher than that of the poorly soluble calcium, the substitutional calcium content was increased, and it could be used as an environmentally friendly fertilizer.

Hereinafter, described in detail step by step the method of the present invention for producing a fertilizer:

(a) preparing a livestock carcass with a livestock carcass liquefaction solution by acid hydrolysis;

First, the method of the present invention is subjected to the step of preparing a livestock carcass as a livestock carcass liquefaction solution by (a) acid hydrolysis reaction.

The livestock carcass liquefaction solution used in the present invention includes a livestock carcass liquefaction solution prepared by various acid hydrolysis reactions known in the art, and preferably 60-70 ml of 6 N hydrochloric acid (HCl) solution per 100 g of livestock carcasses. It includes a livestock carcass liquefaction solution prepared by adding and hydrolyzing at 100 ℃ for 5 hours.

According to a preferred embodiment of the present invention, the livestock carcass used in the present invention is a livestock carcass selected from the group consisting of cattle, sheep, goats, horses, pigs and poultry.

(b) Shell  Preparing a powder;

Next, the present invention includes preparing a shell powder.

According to another preferred embodiment of the present invention, the shell powder used in the present invention is oyster shell powder or clam shell powder, more preferably oyster shell powder.

The shell powder may be commercially available shell powder commercially available, and the powder may be physically crushed by various methods known in the art, for example, by shearing, milling or grinding. It may be prepared, and may be made into a powder using a mill, a knife cutter or a mixer.

(c) the step (b) Shell  Of step (a) per 100 g of powder Livestock  Adding 30-70 ml of liquefied solution and mixing

Subsequently, the method of the present invention comprises adding and mixing 30-70 ml of livestock carcass liquefaction solution of step (a) per 100 g of shell powder of step (b).

By adding the livestock carcass liquefaction solution to the shell powder and mixing, as shown in the right picture of Fig. 1 below, carbon dioxide gas is generated to change CaCO _{3, which} is poorly soluble calcium present in the shell powder, to CaCl ₂ , which is water-soluble calcium. do.

(d) drying the resultant of step (c) at room temperature to adjust the water content to 10-40%

Finally, the method of the present invention comprises the step of drying the resultant of step (c) at room temperature to adjust the water content 10-40%.

In addition, it can be prepared and used as a granular fertilizer using a flocculant (glycine, polyvinyl alcohol, krillium, etc.) for the convenience of storage and treatment of the fertilizer.

According to another preferred embodiment of the present invention, the fertilizer may be used as a land improver.

As is clearly seen in the following examples, the fertilizer of the present invention, as a result of analyzing the content of the replaceable calcium and magnesium, the content of the replaceable calcium and magnesium compared to the shell powder can be used as a land improver.

According to another aspect of the present invention, the present invention provides a fertilizer produced by the method of the present invention described above.

The fertilizer of the present invention is prepared by the above-described method for producing the fertilizer of the present invention, and the common contents of both inventions are omitted in order to avoid excessive complexity of the specification according to the repeated description.

The features and advantages of the present invention are summarized as follows:

(Iii) The present invention relates to a method for producing fertilizers that is environmentally friendly and has high soil improvement (soil physical, chemical and biological) effects as well as neutralization of livestock carcass liquefaction solutions prepared by acid hydrolysis.

(Ii) The fertilizer prepared by the method of the present invention has a tendency to lower the pH value as a result of mixing the livestock carcass liquefaction solution with the shell powder, but it is not a level that can cause acidification of the soil, but rather inorganic substances such as nitrogen, organic matter, phosphoric acid, etc. The nutrient content tended to increase.

(Iii) In addition, the chemical reaction of livestock carcass liquefaction solution with strong acidic properties showed that calcium in shell powder was more water-soluble than water-soluble.

(Iii) As a result of verifying the substitution ability, it was found that the liquefied solution of live carcass liquefied solution was significantly increased than the replaceable calcium content of shell powder sample. In the mixed sample, it was confirmed that the increase was about 2 times.

(Iii) On the other hand, the treatment of livestock carcass liquefaction with organic shellfish shells is rather environmentally friendly and valuable as a fertilizer, rather than chemical treatment for neutralization of acidity (pH) reactions.

Figure 1 is a photograph showing the gas evolution phenomenon (right) generated during the mixing process of the test material (left) and the livestock carcass liquefied solution and oyster shell powder for this test.
Figure 2 is a photograph showing a sample (right) and a sample prepared in the form of granules in the process of mixing the livestock carcass liquefied solution and oyster shell powder (left).
3 is a graph showing a change in pH value according to the mixing ratio of oyster shell powder and livestock carcass liquefaction solution.
4 is a graph showing the change in water-soluble calcium content according to the mixing ratio of oyster shell powder and livestock carcass liquefaction solution.

Hereinafter, the present invention will be described in more detail with reference to Examples. These examples are only for illustrating the present invention in more detail, it is to those of ordinary skill in the art that the scope of the present invention is not limited by these examples in accordance with the gist of the present invention. Will be self-evident.

Example

Materials and Experiments

1. Materials

The livestock carcass liquefaction solution for this test was made using materials purchased from SCI Co., Ltd. in May 2010, and the oyster shell powder was used by purchasing crushed lime fertilizer sold in Gyeongnam. Specifically, the livestock carcass liquefaction solution using a livestock carcass liquefaction solution prepared by adding 70 ml of 6 N hydrochloric acid (HCl) solution per 100 g of livestock carcass and hydrolyzed at 100 ° C for 5 hours.

2. Test method

1) Method of mixing livestock carcass liquefaction solution with oyster shell powder

In order to confirm the possibility of neutralizing the acidity (pH) reaction and the most suitable blending ratio for livestock carcass liquefied solution obtained by acid hydrolysis method, 30, 50 and 70 mL (w / v,%) was mixed by spraying. In order to prepare the oyster shell powder in the form of granules in the mixing process, the sample container was mixed while rotating 360 degrees. After mixing, the sample was naturally dried for about 3 days in order to maintain the sample moisture of 40% or less, and then stored and used in the sample container.

Figure 1 is a photograph showing the gas evolution phenomenon (right) generated during the mixing process of the test material (left) and the livestock carcass liquefied solution and oyster shell powder for this test.

Figure 2 is a photograph showing a sample (right) and a sample prepared in the form of granules in the process of mixing the livestock carcass liquefied solution and oyster shell powder (left).

2) pH response analysis according to the mixing ratio of livestock carcass liquefied solution and oyster shell powder

10 g of a sample prepared by varying the mixing ratio of livestock carcass liquefied solution and oyster shell powder was placed in an electronic balance in a 100 ml plastic beaker, and then 50 ml of primary distilled water was stored in a dryer maintained at a constant temperature of 25 ° C. The pH (pH) reaction was investigated at pH intervals of 3, 5 and 7 days.

3) Test procedure for analysis of inorganic material content

In order to analyze the inorganic content of this test material, 5 g of the sample was flattened in a 250 ml glass triangle flask, and 25 ml of concentrated sulfuric acid solution was put on an electric heat transfer plate, and the sample was colorlessly wetted until the sample was colorless. After digestion, the solution was cooled in air and washed several times with hot distilled water.

4) Water Soluble Calcium Analysis

Take 1 g of the mixture of oyster shell powder and livestock carcass liquefaction solution into an electronic balance, place it in a 50 ml centrifuge tube, add 30 ml of primary distilled water, and shake for 30 minutes using a rotary shaker (213 rpm / min) and centrifuged for 15 minutes (3,000 rpm / min) to remove the supernatant from the test tube, remove the solution from the remaining test tube, and then add distilled water again to take the sample solution three times, followed by inductively coupled plasma (ICP). ) Was analyzed using a spectroscopic analyzer.

5) Substituted calcium and magnesium analysis

5 g of each test material was taken in an electronic balance, placed in a 100 ml Erlenmeyer flask, and 50 ml of 1N-CH ₃ COONH ₄ solution was added.Then, by shaking with a rotary shaker (213 rpm / min) for 30 minutes, the filter paper (No. 2) was used. It was filtered and analyzed using an inductively coupled plasma spectrometer.

6) Analysis method

The pH of Glass electrode method, an organic substance is Tyurin colorimetry, nitrogen and ammonia nitrogen the Kjeldahl (Kjeldahl) distillation, phosphate, potassium, calcium, magnesium and boron, were analyzed by using an inductively coupled plasma spectrometer, silica (SiO ₂₎ is The analysis was done by conversation.

Experiment result

1. Chemical Properties of Test Material

The chemical characteristics of livestock carcass liquefied solution and oyster shell powder for this test are shown in Table 1.

Chemical Characteristics of Carcass Carcass Solution and Oyster Shell Powder (Unit:%) Analysis item
Name of sample pH Organic matter
(OM) nitrogen
(TN) Phosphoric Acid
(P ₂ O ₅ ) calcium
(CaO) Silicic acid
(SiO ₂ ) magnesium
(MgO) boron
(B ₂ O ₃ ) potassium
(K ₂ O) Livestock
Liquefaction solution Strong mountain 28.7 1.92 0.98 0.56 0.16 0.05 0.002 0.44 Oyster shell 9.25 1.33 0.02 0.28 73.50 1.23 0.69 0.004 0.51

The pH value of the liquefied carcass liquefied solution was strongly acidic, so it was not possible to measure the pH. The oyster shell powder showed a value of 9.0 or more, which is opposite to the liquefied carcass liquefied solution. The organic matter (OM) of the livestock carcass liquefied solution was 20 times higher than the oyster shell powder, and the nitrogen (TN) content was also found to be significantly higher than the livestock carcass liquefied solution.

Phosphoric acid (P ₂ O ₅ ) was about 3 times higher than livestock carcass liquefied solution, whereas calcium (CaO) and silicic acid (SiO ₂ ) were the highest in oyster shell powder. Therefore, the pH response also showed the opposite tendency between the livestock carcass liquefied solution and the oyster shell powder, as well as the lack of mineral content required for plant growth. pH) It was judged to be the most suitable raw material for neutralizing the reaction.

2. Chemical Changes According to the Mixing Ratio of Live Carcass Liquefaction Solution and Oyster Shell Powder

The results of chemical changes according to the mixing ratio of livestock carcass liquefied solution and oyster shell powder are summarized in Table 2 below:

Chemical Changes According to Mixture Ratio of Live Carcass Liquefaction Solution and Oyster Shell Powder (Unit:%) Analysis item
Name of sample pH Organic matter
(OM) nitrogen
(TN) Phosphoric Acid
(P ₂ O ₅ ) calcium
(CaO) Silicic acid
(SiO ₂ ) magnesium
(MgO) boron
(B ₂ O ₃ ) potassium
(K ₂ O) Oyster shell 9.25
± 0.02 1.33
± 0.01 0.02
± 0.01 0.28
± 0.02 73.50
± 0.17 1.23
± 0.02 0.69
± 0.03 0.004
± 0.001 0.51
± 0.03 Oyster Shell +
Livestock
30% liquefaction solution added 6.94
± 0.02 4.67
± 0.04 0.45
± 0.04 0.37
± 0.01 73.63
± 0.06 1.22
± 0.01 0.69
± 0.03 0.003
± 0.001 0.55
± 0.01 Oyster Shell +
Livestock
Liquefaction solution
50% added 6.53
± 0.02 7.68
± 0.03 0.58
± 0.02 0.40
± 0.01 73.67
± 0.04 1.24
± 0.01 0.72
± 0.02 0.004
± 0.001 0.55
± 0.02 Oyster Shell +
Livestock
Liquefaction solution
70% added 6.25
± 0.01 10.73
± 0.03 0.71
± 0.01 0.47
± 0.02 73.50
± 0.17 1.24
± 0.02 0.76
± 0.01 0.004
± 0.001 0.58
± 0.03

As the ratio of livestock carcass liquefied solution was added to oyster shell powder, the pH value tended to decrease, but the level of acidification of soil did not appear. In addition, the organic matter (OM) showed a tendency to increase significantly as the addition rate of the livestock carcass liquefaction solution increased. In addition, it was confirmed that the increase rate of nitrogen (TN) content is also increased to a similar level. Phosphoric acid (P ₂ O ₅ ) content also increased slightly, but the content of calcium (CaO), potassium (K ₂ O), silicic acid (SiO ₂ ), magnesium (MgO) and boron (B ₂ O ₃ ) was increased. The sample showed similar levels.

Therefore, as a result, the contents of organic matter, nitrogen, and phosphoric acid were increased as the liquefied animal carcass solution was added as compared to the oyster shell powder, and the pH value was changed from the strong alkalinity to the weak acidity level.

3. pH change according to the mixing ratio of livestock carcass liquefied solution and oyster shell powder

Distilled water (1: 5) was mixed with each sample in a 25 ℃ drier to investigate the pH response according to the mixing ratio of oyster shell powder and livestock carcass liquefaction solution. As shown in FIG. 3, the oyster shell powder sample did not appear to have a large value of change in pH response over time.

The sample pH value of 30% of livestock carcass liquefied solution mixed with specific gravity of oyster shell powder tended to increase to 6.94 on day 1, 7.14 on day 3, 7.14 on day 5, and 7.31 on day 7, respectively. In addition, the pH of the samples mixed with the liquefied solution of livestock carcasses was 6.54, 6.90, 7.07, and 7.03 at 1, 3, 5, and 7 days, respectively. In addition, the pH of the sample mixed with the livestock carcass liquefaction solution 70% showed a tendency to increase to 6.25, 6.83, 6.96, 6.99 at the 1st, 3rd, 5th and 7th day of irradiation, respectively. This reaction can be confirmed that the pH value increases as the irradiation time in all samples mixed with livestock carcass liquefaction solution in oyster shell powder, the cause of the water-soluble calcium content by adding the livestock carcass liquefaction solution to oyster shell powder This is because it increased.

Therefore, as the livestock carcass liquefaction solution was added to the oyster shell powder, the pH value was generally lower than that of the oyster shell powder sample at the beginning of the reaction. Seemed.

4. Water soluble calcium content

In order to confirm the cause of the pH value of the sample mixed with the livestock carcass liquefaction solution to the oyster shell powder as the irradiation days passed, the results of analyzing the change in the water-soluble calcium of each sample is shown in Figure 4 below.

Flatten each sample in a centrifuge test tube, add distilled water, shake for about 30 minutes using a rotary shaker, and centrifuge to extract the supernatant, discard the remaining balance, add distilled water again, and repeat three times. It was.

The water soluble calcium of each sample extracted once was about five times higher in the oyster shell powder and livestock carcass liquefied solution than the oyster shell powder. In addition, the calcium content was dissolved about twice as much as the oyster shell powder in the liquid extracted twice and three times.

Considering these results, most of the calcium in the oyster shell was composed of calcium carbonate (CaCO ₃ ), but the chemical composition was changed to calcium chloride (CaCl ₂ ), which was somewhat water-soluble due to the effect of the liquefied solution of live carcasses. It can be confirmed.

5. Substituted calcium content

Table 3 below shows the results of analyzing the substitutional calcium and magnesium content of each sample according to the mixing ratio to determine whether the sample mixed with the oyster shell powder and the livestock carcass liquefaction solution has the effect of fertilization as well as soil improvement. Was:

Substituted Calcium and Magnesium Contents according to the Mixing Ratio of Oyster Shell Powder and Livestock Carcass Liquid Solution Analysis item
Name of sample Ex.-Ca Cmol + / kg Ex.-Mg Cmol + / kg Oyster Shell Powder 48.660.66 3.830.29 Oyster shell powder + livestock carcass liquefaction solution 30% 72.00.50 6.501.32 Oyster shell powder + livestock carcass liquefaction solution 50% 74.51.80 6.831.04 Oyster shell powder + livestock carcass liquefaction solution 70% 84.661.53 4.660.29

Substituted calcium and magnesium (Ex.-Ca, Mg) contents of oyster shell powders were 48.66 and 3.83 Cmol + / kg, respectively. Sex calcium and magnesium tended to increase to 72.0 and 6.50 Cmol + / kg, respectively. In addition, it was confirmed that the substitutional calcium and magnesium of the sample mixed with the liquefied solution of livestock carcasses increased to 74.5 and 6.83 Cmol + / kg, respectively.

According to the specific gravity of the oyster shell powder, the substitutional calcium of the sample containing 70% of the livestock carcass liquefaction solution was increased to 84.66 Cmol + / kg, which was about 2 times higher than that of the oyster shell powder.

Therefore, when mixed with livestock carcass liquefied solution compared to oyster shell powder and fertilized in arable land soil, it is believed that not only the calcium effect of the plant is high but the soil improvement effect is also great.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention. Thus, the substantial scope of the present invention will be defined by the appended claims and equivalents thereof.

Claims (6)

Fertilizer manufacturing method comprising the following steps:
(a) preparing a livestock carcass with a livestock carcass liquefaction solution by an acid hydrolysis reaction;
(b) preparing a shell powder;
(c) adding and mixing 30-70 ml of livestock carcass liquefaction solution of step (a) per 100 g of shell powder of step (b); And
(d) drying the resultant of step (c) at room temperature to adjust the water content to 10-40%.
The method according to claim 1, wherein the acid hydrolysis reaction of step (a) is performed by adding 60-70 ml of 6 N hydrochloric acid (HCl) solution per 100 g of livestock carcass, and performing the mixture at 100 ° C for 5 hours.
The method of claim 1, wherein the livestock carcass of step (a) is a livestock carcass selected from the group consisting of cattle, sheep, goats, horses, pigs and poultry.
The method according to claim 1, wherein the shell powder of step (b) is oyster shell powder or clam shell powder.
The method of claim 1 wherein the fertilizer is used as a land improver.
Fertilizer produced by the method of any one of claims 1 to 5.

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