KR20180029125A - Method for manufacturing pellet type of slow releasing fertilizer using biochar and manure compost - Google Patents

Abstract

The present invention relates to a method for manufacturing a pellet type slow-releasing fertilizer using biochar and animal manure compost, and to a fertilizer manufactured by the method. The pellet type fertilizer manufactured by the method according to one embodiment of the present invention has an excellent adsorption and removal efficiency of ammonia nitrogen and has a carbon sequestration effect, can reduce nitrous oxide and carbon dioxide, greenhouse gases corresponding to climate change, has an excellent effect as a slow-release fertilizer, and has an effect of reducing the damage caused by accumulation of salts. In addition, since the fertilizer is manufactured in the form of pellets and is easy to store and transport, the fertilizer manufactured by the method of the present invention can be used excellently as the slow-releasing fertilizer.

Description

TECHNICAL FIELD The present invention relates to a pellet-type slow-release fertilizer using a bio-tea and a livestock compost,

The present invention relates to a method for producing a pellet-shaped fertilizer using a bio-tea and an animal compost, and a fertilizer produced thereby.

Greenhouse gases (GHG) from fuels such as coal, oil, and natural gas have a significant impact on the greenhouse effect. It is estimated that greenhouse gases, especially carbon dioxide (CO ₂ ), generated from agriculture and land use accounts for 20% of the total greenhouse gas emissions, and also studies on the direct and indirect effects of crop change due to climate change (Non-Patent Document 1 and Non-Patent Document 2).

The global warming potential (GWP) of nitrous oxide (N ₂ O) is 298 times higher than that of carbon dioxide and the concentration of nitrous oxide in the atmosphere is increasing by 0.8% per year. Nitrous oxide, which has a great influence on global warming, is produced during the denitrification process in the nitrogen cycle, and denitrification is affected by pH, soil moisture, carbon and nitrogen. The use of N fertilizer and organic soil amendment accelerates the decomposition of organic matter to produce carbon compounds that are easily decomposed, increasing the rate of denitrification in the soil and promoting the emission of nitrous oxide (Non-Patent Document 3, Non-Patent Document 4, Non-Patent Document 5, Non-Patent Document 6, Non-Patent Document 7, Non-Patent Document 8).

As a method for suppressing the emission of nitrous oxide, biochar has attracted attention. Bio-tea is a by-product that is generated in the process of making bio-oil through pyrolysis and liquefaction technology and is used as an adsorbent. Bio-tea is a solid material with high carbon content that can be obtained by pyrolyzing biomass in an oxygen-restricted environment (Non-Patent Document 9).

Livestock manure refers to the dung and urine excreted by livestock such as cows, pigs, and chickens. It is also referred to as livestock manure. It contains various organic compounds and fertilizer components such as nitrogen, phosphoric acid and potassium, and is used as fertilizer in crops and fruit juices. However, the amount of fertilizer is too much, . Composting the livestock manure by fermentation is called compost manure.

On the other hand, salt accumulation means that the salt contained in surface water, ground water and base metal gradually accumulates on the surface through vertical and horizontal movement of soil capillary water under strong evaporation. It occurs frequently in dry and semi-arid climatic zones and may occur in enclosed environments or over-fertilized soils, such as in institutional houses. When there is a large amount of salt in the soil, it damages the cultivated crops, causing a decrease in growth and severe damage. This is called salt stress. As a solution method of salt accumulation, we used methods such as removal of salt, turning, soil replacement, etc., in which rice was padded with water. However, the method of containing water has the disadvantage that the underground salts flow up to the surface of the soil after a certain period of time and the effect is lowered, and the replacement of the soil is costly. The chelating agent technology has been developed to overcome the disadvantages of existing salt concentration solutions. When the chelating agent is sprayed on the plantation, nutrients such as nitrogen, phosphorus, potassium, calcium and magnesium fixed or insoluble in the soil become easily absorbed from the crops and promote crop growth.

Slow-release fertilizer means fertilizer where the effect of fertilizer appears slowly, which is also called delayed fertilizer. The advantage of the slow-release fertilizer is that it can supply nutrients as much as the required amount of nutrients depending on the growing season of the crop. Mineral nitrogen and potassium fertilizers have a low effective fertilizer utilization rate, so it is necessary to develop them so that these fertilizer components slowly dissolve. Slow-release fertilizer has the advantages of low loss of fertilizer components, which can increase fertilizer efficiency.

Korean Patent No. 1188062 discloses a slow-release fertilizer complex capable of controlling the rate of dissolution of a fertilizer and a method for producing the same. More specifically, the slow-release fertilizer includes a woody biomass and a fertilizer uniformly contained therein, Wherein the lignin contained in the biomass is an adhesive by heating and pressing to form a combination of the biomass and the fertilizer (Patent Document 1). However, there has not yet been developed a technique for producing a pellet-type slow-release fertilizer using bio-tea and livestock compost and a three-component compound fertilizer such as nitrogen, phosphoric acid and garlic.

Thus, the present inventors have succeeded in producing a pellet-type slow-release fertilizer using bio-tea and livestock manure compost and three-component compound fertilizer such as nitrogen, phosphoric acid, and garlic, and found that the fertilizer thus produced has a slow effect, The present invention has been completed based on this fact.

Korean Patent Registration No. 1188062

 Lehmann, J. (2007). Nature, 447 (7141), 143-144.  KOUCHAKI, A.R., & NASIRI, M. M. (2008). Iranian Journal of Field Crops Research, 6, 139-153.  Davidson et al., (1986). Applied and Environmental Microbiology, 52 (6), 1280-1286.  Law et al., (2011). Water research, 45 (18), 5934-5944.  Beare et al., (2009). Soil Biology and Biochemistry, 41 (3), 611-621.  Wang et al. (2011). Biology and Fertility of Soils, 47 (8), 887-896.  Chatterjee et al., (2008). Soil Biology and Biochemistry, 40 (7), 1901-1907.  Perez et al., (2010). Chilean Journal of Agricultural Research, 70 (2), 251-258.  Arami-Niya et al., (2011). BioResources, 7 (1), 246-264.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for producing a pellet-type fertilizer using a bio-tea and an animal compost.

Another object of the present invention is to provide a pellet-type fertilizer using the bio-tea and the livestock compost produced by the method.

One embodiment of the present invention provides a method for producing a fertilizer in the form of pellets using a bio-tea and an animal compost, the method comprising the following steps.

1) pulverizing a bio-tea obtained by pyrolyzing biomass into a fine powder;

2) mixing the compost with the bio-tea to produce a mixture of compost and bio-tea;

3) adding water or a solution containing at least one of nitrogen, phosphoric acid and potassium to the bio-tea and compost mixture of step 2); And

4) preparing the mixture of step 3) in the form of a pellet.

As used herein, the term "fertilizer" refers to any material that provides one or more of the elements necessary for the normal growth of a plant, including organic, inorganic, natural acids, and synthetic. When the content is relatively low in the soil, nitrogen, phosphorus, and potassium, which are highly reacted by plants, are referred to as fertilizer three elements. In addition to the three elements, calcium, magnesium, and sulfur, which are often used in large quantities and are likely to cause plant reactions, are called secondary elements. In general, fertilizers that supply only one species among three-element system fertilizers are referred to as single fertilizers. Fertilizers that supply two or more species are compound fertilizers, and plants and animals are treated as organic fertilizers. Salts used as fertilizers are highly water-soluble, and fast-dissolving quickly dissolves in soil water. There is a persistent chemical form that makes fertilizer effective, which is generally referred to as "slow-release fertilizer".

As used herein, the term "biomass" means an organism, such as a plant or animal, used to be used as an energy source.

In the step 1), the biomass may be a plant residue, and may be, for example, rice hull, rice straw, barley straw or food waste, and may be, for example, rice hulls. However, Any biomass that can be used can be used.

As used herein, the term " biochar "refers to a byproduct generated during the process of making bio-oil through pyrolysis and liquefaction technology. In this case, biomass It is a solid material with high carbon content which can be obtained by pyrolysis.

Specifically, the bio-tea used in this embodiment may be a by-product generated by pyrolyzing the biomass at 400 to 800 ° C.

In the step 1), the bio-tea may be pulverized into fine powders of 0.1 to 2 mm, but the present invention is not limited thereto. If the size of the particles exceeds 2 mm, the surface area of the bio-disc may decrease, which may result in poor adsorption capability.

After the step 1), the step 1 ') may further comprise activating the pulverized bio-tea at 500 to 1,000 ° C. Activation of the bio-tea at high temperature may increase the adsorption capacity because the bio-tea becomes porous and increases the surface area. However, it is also possible to omit this step in consideration of the production unit price.

For example, 9: 1, 8: 2, 6: 4, 4: 6, 2: 8, 1: But the present invention is not limited thereto.

As used herein, the term " manure compost "means compost produced from livestock manure as a raw material, which may mean composting the livestock manure (swine, cow, .

The animal composting in step 2) may be poultry manure, manure manure or manure compost, and may be, for example, manure compost, but is not limited thereto.

When the fermented product is fermented for about 2 ~ 3 months, the smell disappears and the nitrogen component is higher than that of bovine, so it can be used not only as an organic material but also as a byproduct fertilizer. Nitrogen in pork may have an effect equivalent to 50 to 60% of ammonium nitrogen or urea nitrogen.

In step 3), water is added in an amount of 100 to 1000 parts by weight, specifically 200 to 600 parts by weight, more specifically 300 to 500 parts by weight, for example, 400 parts by weight, based on 100 parts by weight of the mixture of bio- But is not necessarily limited thereto. If water is added in an excessively large amount or is added in excess of the above range, the pelletization process may not be performed well and energy may be consumed during drying, resulting in an increase in process cost.

In step 3), nitrogen (N) may be nitrogen or urea, or nitrogen contained in ammonium sulfate.

In step 3), phosphoric acid (P) may be phosphoric acid contained in fused phosphate.

In the step 3), potassium may be potassium contained in potassium chloride (or potassium chloride).

In the step 3), the solution containing at least one of nitrogen, phosphoric acid and potassium may be a solution containing nitric acid, a solution containing phosphoric acid and a solution containing potassium, respectively, or two or more of nitric acid, phosphoric acid and potassium May be used. The solution containing at least one of nitrogen, phosphoric acid and potassium may be a solution prepared by adding at least one of nitrogen, phosphoric acid and potassium to water and reacting at 30 to 90 ° C. It can react at 30 ~ 90 ℃ to increase the solubility of nitrogen, phosphoric acid and potassium.

The solution containing at least one of nitrogen, phosphoric acid and potassium in the step 3) is added to 100 to 1000 parts by weight, specifically 200 to 600 parts by weight, more preferably 300 to 500 parts by weight, for 100 parts by weight of the bio- By weight, for example, 400 parts by weight, but not always limited thereto. When the solution containing at least one of nitrogen, phosphoric acid and potassium is added in excess of the above range, the solubility is lowered so that the reaction does not occur. If the solution is added in a small amount, the fertilizer content may be lowered as a slow-releasing fertilizer.

In the case where a solution containing both nitrogen, phosphoric acid and potassium is used in the step 3), the weight ratio of nitrogen: phosphoric acid: potassium = 0.8-1.25: 0.1: 0.3 is preferable, but not always limited thereto.

The preparation in the form of pellets in the above step 4) can be carried out by a method known in the art, for example, a pellet can be produced using a commercially available pelletizer.

The pellets in step 4) may be 1 to 10 mm in size, specifically 1 to 5 mm in size, for example 3 mm in size or 3 to 5 mm in size, But is not limited to, and may be manufactured to a size suitable for use as a fertilizer.

Another embodiment of the present invention provides a pellet-type fertilizer using the bio-tea and the livestock compost produced by the method.

The fertilizer according to the present embodiment is a slow-release fertilizer and may have a property of slowly and continuously elongating at least one fertilizer element of nitrogen, phosphoric acid, potassium and silicon.

The pellet type fertilizer produced by the method according to one embodiment of the present invention is excellent in the adsorption and removal efficiency of ammonia nitrogen and has a carbon sequestration effect and can reduce greenhouse gases such as nitrous oxide and carbon dioxide, The effect is excellent, and there is an effect of improving the damage of the sequence due to accumulation of salts. In addition, since the fertilizer is manufactured in the form of pellets and is easy to store and transport, it can be used excellently as a fertilizer.

1 is a view showing a pellet-shaped manufacturing process of a fertilizer using a pelletizer.
FIG. 2 is a view showing a general fertilizer application process (above) and a use process (below) of a fertilizer manufactured according to an embodiment of the present invention.
3 shows the adsorption amount of ammonia nitrogen (NH ₄ -N) according to the mixing ratio (9: 1, 8: 2, 6: 4, 4: 6, 2: 8) And a removal rate characteristic.
4 is a graph showing the cumulative concentration of nitrogen in soil for 0 to 77 days after fertilizer treatment: TN, a nitrogen-enriched fertilizer treated group prepared according to Example 2; HTN, a group treated with high concentration nitrogen-slowing fertilizer prepared according to Example 3; TNPK, NPK complex slow-acting fertilizer treated group prepared according to Example 4; HTNPK, the high concentration NPK complex slow-release fertilizer treatment group prepared according to Example 5; PC, treated with only swine compost.
5 is a graph showing cumulative concentrations of phosphoric acid in soil for 0 to 77 days after fertilizer treatment: TN, a nitrogen-enriched fertilizer treated group prepared according to Example 2; HTN, a group treated with high concentration nitrogen-slowing fertilizer prepared according to Example 3; TNPK, NPK complex slow-acting fertilizer treated group prepared according to Example 4; HTNPK, the high concentration NPK complex slow-release fertilizer treatment group prepared according to Example 5; PC, treated with only swine compost.
Figure 6 is a graph showing cumulative potassium concentrations in soil for 0 to 29.3 days after fertilizer treatment: TN, the slow release fertilizer treated group prepared according to Example 2; HTN, a group treated with high concentration nitrogen-slowing fertilizer prepared according to Example 3; TNPK, NPK complex slow-acting fertilizer treated group prepared according to Example 4; HTNPK, the high concentration NPK complex slow-release fertilizer treatment group prepared according to Example 5; PC, treated with only swine compost.
7 is a graph showing the cumulative concentration of silicic acid in soil for 0 to 77 days after fertilizer treatment: TN, a nitrogen-enriched fertilizer treated group prepared according to Example 2; HTN, a group treated with high concentration nitrogen-slowing fertilizer prepared according to Example 3; TNPK, NPK complex slow-acting fertilizer treated group prepared according to Example 4; HTNPK, the high concentration NPK complex slow-release fertilizer treatment group prepared according to Example 5; PC, treated with only swine compost.
Figure 8 is a graph of soil electrical conductivity measured after fertilizer treatment: control, control without any fertilizer treatment; Manure, pig manure compost; Pellet, the swine pellet fertilizer treated group prepared in Comparative Example 1; 9: 1, the fertilizer treated group prepared in Example 1-1; 8: 2, the fertilizer treated group prepared in Example 1-2; 6: 4, the fertilizer treated group prepared in Example 1-3; 4: 6, the fertilizer treated group prepared in Example 1-4; 2: 8, the fertilizer treated group prepared in Example 1-5; TN, the nitrogen-slowing fertilizer treatment group prepared in Example 2; HTN, a group treated with the high concentration nitrogen slow-release fertilizer prepared in Example 3; TNPK, the NPK slow-acting fertilizer treated group prepared in Example 4; HTNPK, the group treated with the high concentration NPK slow-acting fertilizer prepared in Example 5.
FIG. 9 shows the results of a test of lettuce biomass by fertilizer treatment: TN, a nitrogen-treated fertilizer treated group prepared according to Example 2; HTN, a group treated with high concentration nitrogen-slowing fertilizer prepared according to Example 3; TNPK, NPK complex slow-acting fertilizer treated group prepared according to Example 4; HTNPK, the high concentration NPK complex slow-release fertilizer treatment group prepared according to Example 5; PC, pig manure compost fertilizer treatment group; Pellets, the swine pellet fertilizer treated group prepared in Comparative Example 1.

Hereinafter, the present invention will be described in more detail in the following Examples. It should be noted, however, that the following examples are illustrative only and do not limit or limit the scope of the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

< Example  1> Bio tea  And Cattle  Compost Pellets  Type fertilizer manufacturing

Pellet type fertilizer was prepared using bio - tea and livestock compost.

Specifically, rice husk was pyrolyzed at 400 to 800 ° C to obtain a by-product, biochar. The resulting bio-tea was finely pulverized to 0.1 to 2 mm. The compost of bio-tea and pork was mixed and stirred at a weight ratio shown in Table 1 below. Water was mixed and sprayed evenly in a 1: 4 weight ratio to the compost mixture of the bio-tea and the poultry. The mixed sample was placed in a pelletizer (manufacturer: Keumgang ENG) and made into a pellet of bio-tea and dried at 30 to 90 ° C. The size of the pellet was 3 to 5 mm. A process for producing pellets using a pelletizer is shown in Fig.

Mixing weight ratio ( Bio tea: Swine  compost) Example  1-1 9: 1 Example  1-2 8: 2 Example  1-3 6: 4 Example  1-4 4: 6 Example  1-5 2: 8

< Example  2> Bio tea  And Using composting of livestock Pellets  Nitrogen-slowing fertilizer production of type

Pelleted type nitrogen - sensitive fertilizer was prepared by using bio - tea and animal manure compost.

Specifically, a nitrogen saturated solution was prepared by adding urea to water. At this time, a saturated solution was prepared with a nitrogen: water dissolution ratio of 0.8: 1 (v / w) (that is, 240 g of urea was added with 300 ml of water). The same procedure as in Example 1 was carried out except that the mixed weight ratio of the bio-tea and the pork compost was set to 4: 6, and the saturated solution of nitrogen instead of water was added to the biocide and the pork compost mixture to obtain a pellet-type nitrogen- .

< Example  3> Bio tea  And Cattle  Compost Pellets  Type nitrogen fertilizer with high concentration

Pellet type high - concentration nitrogen slow - release fertilizer was prepared using bio - tea and livestock compost.

Specifically, the bio-tea was used after being activated at 700 to 1000 ° C. Nitrogen solution was heated at 50 ~ 90 ℃ while adding urea to prepare a nitrogen saturated solution at a high concentration. At this time, a saturated solution was prepared (i.e., 375 g of urea was added to 300 ml of water) at a nitrogen: water dissolution ratio of 1.25: 1 (v / w). The pellet-type high-concentration nitrogen-shedding effect was carried out in the same manner as in Example 1, except that the mixing ratio of the bio-tea and the poultry compost was 4: 6 and that the high-concentration nitrogen saturation solution was added to the bio- Fertilizer was prepared.

< Example  4> Bio tea  And Cattle  Compost Pellets  Type NPK  Compound Slow-Release Fertilizer Manufacture

Pellet type NPK complex slow - release fertilizer was prepared by using bio - tea and livestock compost.

Specifically, the urea is added to water to prepare a saturated solution of nitrogen (N), fused phosphate fertilizer is added to water to prepare a saturated solution of phosphoric acid (P), and potassium chloride is added to water To prepare a saturated solution of potassium (K). Nitrogen saturated solution, saturated phosphoric acid solution and potassium saturated solution were mixed and reacted at 30 ~ 90 ℃ to prepare NPK complex saturated solution. The dissolution ratio of nitrogen: phosphoric acid: potassium: water was 0.8: 0.1: 0.3: 1 (w / v) (i.e., 240 g of water, 240 g of nitrogen, 30 g of phosphoric acid and 90 g of potassium). The pellet-type NPK complex slow-release effect was obtained by carrying out the same method as in Example 1, except that the mixing ratio of the bio-tea and the pork compost was 4: 6 and that the NPK complex saturated solution was added to the biocide- Fertilizer was prepared (Fig. 2).

< Example  5> Bio tea  And Cattle  Compost Pellets  High concentration of type NPK  Compound Slow-Release Fertilizer Manufacture

Pellet type high concentration NPK complex slow - release fertilizer was prepared using bio - tea and livestock compost.

Specifically, the urea is added to water to prepare a saturated solution of nitrogen (N), fused phosphate fertilizer is added to water to prepare a saturated solution of phosphoric acid (P), and potassium chloride is added to water To prepare a saturated solution of potassium (K). Nitrogen saturated solution, saturated phosphoric acid solution and potassium saturated solution were mixed and reacted at 30 ~ 90 ℃ to prepare NPK complex saturated solution. The dissolution ratio of nitrogen: phosphoric acid: potassium: water was 1.25: 0.1: 0.3: 1 (w / v) (i.e., 300 g of water was added with 375 g of nitrogen, 30 g of phosphoric acid and 90 g of potassium). Pellet type high concentration NPK was carried out in the same manner as in Example 1 except that the mixing ratio of the bio-tea and the pork compost was set to 4: 6 and the high concentration NPK complex saturated solution was added to the biocide and the pork compost mixture instead of water. Complex slow-release fertilizer was prepared.

< Comparative Example  1> Cattle  Compost Pellets  Type fertilizer manufacturing

Pellet type fertilizer was produced using only animal compost.

Specifically, a pellet type fertilizer was produced by using the pork composting in the same manner as in Example 1, except that only the pork compost was used without adding bio-tea.

< Experimental Example  1> Confirmation of adsorption and removal efficiency of ammonia nitrogen

Experiments were carried out to confirm the adsorption and removal efficiency of ammonia nitrogen (NH ₄ -N) from the pellet type fertilizer using the bioaccumulator and the swine compost produced according to Examples 1-1 to 1-5.

Specifically, 0.25 to 1 g of each pellet prepared according to Examples 1-1 to 1-5 was added to a plastic bottle, and 50 ml of distilled water was injected. Then, a reciprocating constant-temperature shaker (JP / NTS- 3000, Eyela, Tokyo, Japan) for 24 hours at 25 ° C and 140 rpm. At this time, since the particle size of the pellet was 5 mm, it was filtered using Whatman No. 2 filter paper. The NH ₄ -N component of this leachate was analyzed and the amount of NH ₄ -N adsorbed on each pellet and the removal rate were calculated.

As a result, the adsorption amount of ammonia nitrogen (NH ₄ -N) was 2.56 ~ 6.30 mg / g and the removal rate of ammonia nitrogen (NH ₄ -N) when the pellet type fertilizer using bio- Was in the range of 32.5 ~ 88.9%. In addition, it was confirmed that the ammonia nitrogen adsorption and removal efficiency increases as the mixing ratio of the bio-tea increases (FIG. 3).

Therefore, it can be seen that the use of pellets prepared by mixing bio-tea and pig manure compost can reduce the emission of greenhouse gas nitrous oxide by delaying the nitrification process by adsorbing ammonium nitrogen.

< Experimental Example  2> Determination of dissolution characteristics of nitrogen, phosphoric acid, potassium and silicon

(TNN), high-concentration nitrogen slow-release fertilizer (HTN), NPK complex slow-release fertilizer (TNPK), high-concentration NPK complex slow-release fertilizer (HTNPK) and pig manure compost fertilizer (PC) prepared according to Examples 2 to 5, nitrogen , And the dissolution characteristics of phosphoric acid, potassium and silicon.

Specifically, 5 g of the pallet-type slow-release fertilizer prepared in advance was filled in the column, and then 50 ml of distilled water was added. Periodically, 50 ml of the distilled water filled at an interval of 2 days was completely eluted from the first day after 30 days at an interval of 1 day, and immediately, 50 ml of distilled water was filled. At this time, the eluted water samples were filtered using a Whatman No. 2 filter paper, and NH ₄ -N and NO ₃ -N were analyzed with an Auto Technician Analyzer. The concentrations of PO ₄ -P, K, and SiO ₂ were measured using a UV spectrophotometer (ST-Ammonium, C-Mac, Korea).

As a result, nitrogen, phosphoric acid, and silicon were continuously eluted for 75 days, and potassium was eluted for about 7 days (FIGS. 4, 5, 6, and 7).

Therefore, it was confirmed that the pellet type fertilizer produced by mixing the bio-tea and the pork compost has the characteristics of the slow-acting fertilizer.

< Experimental Example  3> Effect of salt accumulation to improve the damage

Too high electrical conductivity in the soil may cause crop damage and damage, resulting in proper electrical conductivity of the soil suitable for growing crops. The chelating agent can make the salt accumulated in the soil good for the crop to absorb. Thus, in order to confirm the inorganic salts and NaCl content of the soil after using the fertilizer of the present invention, soil electrical conductivity (EC) was measured.

Specifically, the experimental group was conducted as follows: control without any fertilizer, poultry compost treatment group (pork), pork pellet fertilizer treated group (pellet) prepared in Comparative Example 1, (9: 1) prepared in Example 1-1, the fertilizer treated group (8: 2) prepared in Example 1-2, the fertilizer treated group (6: 4) prepared in Example 1-3, , The fertilizer treatment group (4: 6) prepared in Example 1-4, the fertilizer treated group (2: 8) prepared in Example 1-5, the nitrogen slowing fertilizer treated group (TN) (HTN) prepared in Example 3, the NPK slow-acting fertilizer treated group (TNPK) prepared in Example 4, and the HTKPK treated with high-concentration NPK slow-acting fertilizer prepared in Example 5. Slow release fertilizer was padded with 6.6g of pellet, and bio-tea pellet with fertilizer application rate of 0.115-0.29-0.12g / pot (N, P, K). A 30 - day - old seedlings were planted in each pot after sowing the lettuce variety mini - cup main. Water management was carried out using a drip irrigation system. And soil samples were collected at intervals of two weeks to measure electrical conductivity, and lettuce was harvested and compared.

As a result, the electric conductivity of the pellet fertilizer using the mixture of the bio-tea and the poultry manure prepared in Example 1-1 at 9: 1 was about 3.8 ds / m, which is the lowest (Fig. 8).

Therefore, it was confirmed that the pellet fertilizer prepared by mixing 9: 1 biocide and swine compost can be used as a chelating agent substitute.

< Experimental Example  4> Lettuce creature test

Nitrogen Slowing Fertilizer (TN), High Nitrogen Slowing Fertilizer (HTN), NPK Complex Slowing Fertilizer (TNPK), High Concentration NPK Compound Slowing Fertilizer (HTNPK) and Pig Manure Compost Fertilizer (PC) prepared according to Examples 2 to 5 and Comparative Example The pelleted pellet fertilizer (Pellets) was used to conduct a test for lettuce biomass.

Specifically, after mixing the water-based soil and the horticultural soil at a weight ratio of 1: 4, the slow-release fertilizer was pelletized to 6.6 g and the bio-pellet to the fertilizer application volume of 0.115-0.29-0.12 g / pot (N, P, K) The mixture was mixed well and filled into the pot. A 30 - day - old seedlings were planted in each pot after sowing the lettuce variety mini - cup main. Water management was carried out using a drip irrigation system. We collected and compared the data of lettuce harvested 5 times.

As a result, it was confirmed that there was no significant difference in the yield of lettuce among all the experimental groups as compared with the control (FIG. 9).

Thus, it was confirmed that the pellet fertilizer of the present invention can be used as a fertilizer for cultivating actual crops.

< Experimental Example  5> Carbon sequestration effect

Methane gas or nitrous oxide as a greenhouse gas released into the atmosphere is generated when organic fertilizer is decomposed in the soil. Therefore, by converting agriculture biomass into bio-car, it mixes with composting of livestock and injects slow-release fertilizer according to pelletization process into farmland, so it absorbs ammonium nitrogen as well as soil carbon sequestration, thereby mitigating greenhouse gas generation by delaying nitrification process.

In the analysis of the carbon sequestration effect applied to the corn cultivated land, bio - tea was inoculated with the whitish maize No. 2. This experiment consisted of bovine compost treatment, aerobic digestive juice treatment, and poultry compost + 1% bio tea treatment. The application rate of chemical fertilizer was 190-39-221 kg / ha. The application rates of pig manure and manure compost were 25,000 kg / ha and 5500 kg / ha, respectively. In addition, aerobic digestive juice was sprayed at 100 ton / ha, and the biocide application volume was 1% of the soil weight (1,300,000 kg / ha). Soil samples were collected at intervals of 15 days during the experiment. Soil carbon, organic carbon and inorganic carbon contents were analyzed and the components of corn yield were investigated.

As a result of the experiment, the model formula, Y = 0.5523X-742.57 (r ² = 0.9392), which calculated the carbon sequestration amount in the soil was calculated. Therefore, if we substitute the biochapel pellets for this formula, if we apply 1% of the soil weight to the biochap About 4 tonnes of carbon could be sequestered, and 1% bio-tea was added at the time of cultivating the crop during the emission trading, which was estimated to range from KRW 17,000 to KRW 538,000 per hectare (Table 2).

Treatment * Carbon sequestration
(kg ha ^-1 ) ** CO ₂ - e emission reduction
(MT ha ^-1 ) Profit (Profit, Won ha ^-1 ) *** 1191 / MT CO ₂ 9,409 / MT CO ₂ 36,921 / MT CO ₂ AD   429    0.16    191   1,501   5,907 CC 2,366    0.87  1,036   8,182  32,121 PC + 1% Biochar 3,978   14.58 17,365 137,203 538,308

* AD; Aerobic digestate, CC; Cow compost, PC; Pig compost.

** 1 kg C = 3.664 kg CO ₂ - e

*** $ 1.00 = $ 1.19 = 1 MT CO ₂

Therefore, it can be seen that the pellet fertilizer of the present invention can be used for isolating carbon dioxide which is a greenhouse gas.

Claims (9)

1) pulverizing a bio-tea obtained by pyrolyzing biomass into a fine powder;
2) mixing the compost with the bio-tea to produce a mixture of compost and bio-tea;
3) adding water or a solution containing at least one of nitrogen, phosphoric acid and potassium to the bio-tea and compost mixture of step 2); And
And 4) preparing the mixture of step 3) in the form of pellets. The method of manufacturing a pellet-type fertilizer using bio-tea and livestock compost. The method of claim 1, wherein the biomass is rice hull, rice straw, barley straw or food waste. The method according to claim 1, wherein in step 1), the bio-tea is pulverized into fine powders of 0.1 to 2 mm. The method according to claim 1, wherein in step 2), the mixture is mixed at a weight ratio of 9: 1 to 1: 9. The method according to claim 1, wherein the composting in step (2) is poultry manure, manure compost or manure compost. The method according to claim 1, wherein in step 3), water is added in an amount of 100 to 1000 parts by weight based on 100 parts by weight of the mixture of compost and bio-tea. The method according to claim 1, wherein the solution containing at least one of nitrogen, phosphoric acid and potassium in step 3) is added in an amount of 100 to 1000 parts by weight based on 100 parts by weight of the mixture of the bio-tea and the compost. The method according to claim 1, wherein when using a solution containing both nitrogen, phosphoric acid and potassium in said step 3), the weight ratio of nitrogen: phosphoric acid: potassium = 0.8-1.25: 0.1: 0.3. The method of claim 1, wherein the pellets in step 4) are 1 to 10 mm in size.

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