KR101442731B1 - Anaerobic fermentation of the feature-specific customized liquid device manufactur and manufactur method - Google Patents

Abstract

More particularly, the present invention relates to a method of producing liquid manure using livestock manure, and more particularly, to a method of producing liquid manure using livestock manure, And low phosphoric acid low concentration liquid fertilizer can be prepared and supplied in stages according to the type of crop or the fertilizer supply time of the crop. In this invention, the digestive juice remaining in the production of biogas is processed again, Of liquid fertilizer. In particular, the present invention relates to an apparatus and a method for manufacturing customized liquids of anaerobic digestive juices, in which biogas is supplied as a heat source for a boiler, a cogeneration plant, and the like, .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anaerobic fermentation apparatus,

More particularly, the present invention relates to a method of producing liquid manure using livestock manure, and more particularly, to a method of producing liquid manure using livestock manure, The present invention relates to a method for manufacturing customized liquids for anaerobic digestive juices, which is capable of supplying low-concentration liquids in stages according to kinds of crops or fertilizer supply periods of crops.

Liquor is typically produced using livestock manure or food waste.

Conventionally, livestock manure and food wastes have been dumped in the sea, but nowadays, they are not allowed to dive in the sea under international law.

As such, there are many ways to treat manure wastes and food wastes as they can not dredge them. Despite the problems of low economic efficiency, manure wastes and food wastes must be disposed of. Active research is underway.

Looking at the prior art in this area

The "method for producing liquid fertilizer" of Korean Patent Registration No. 0874136 (prior art 1)

A method for producing a liquid fertilizer,

The present invention relates to a pharmaceutical composition containing at least one compound selected from the group consisting of nitrogen, phosphoric acid, potassium oxide, magnesium oxide, calcium oxide, glycine, alanine, isoleucine, leucine, valine, arginine, histidine, lysine, asparagine, glutamine, , Methionine, tryptophan and cystine into a raw material tank (20) and circulating the raw material liquid for 20 to 24 hours (S100);

(S 110) of sterilizing the aeration-circulated raw material through the ultraviolet sterilizer, and supplying the sterilized raw material to the mixing tank (30) and the chemical dissolution tank (40);

The raw materials supplied to the chemical dissolution tank 40 include urea, phosphoric acid, and potassium hydroxide, which are three essential elements of fertilizer, and ferrous sulfate, iron sulfate, zinc sulfate, manganese sulfate, copper sulfate, magnesium sulfate, boric acid, and molybdenum oxygen , Step (S120) of dissolving calcium chloride and an organic nutrient;

When the temperature of the reaction heat generated at this time is increased to 40 ° C, the mixed raw materials of the chemical dissolution tank 40 dissolved through the above step S120 are supplied to the mixing tank 30, (S130);

The fermentation tank 50 irradiates the supplied mixed raw material with an illumination lamp 80 to promote the propagation of photosynthetic bacteria in the mixed raw material and fermenting the mixture for 10 to 12 hours while maintaining the temperature at 30 to 40 ° C, Wow;

The mixed raw materials fermented through the step S140 are discharged and fed to the aging tank 60. The blasted air is mixed with the blended raw materials by irradiating the illumination lamp 80, (S 150);

The mixed raw material aged through the step S150 is filtered through the filter 100 to adjust the pH of the solution to 6 to 7.3 and the liquid fertilizer having the pH adjusted PH to the storage tank 70 (S160) repeatedly feeding and feeding the air, and performing air injection and circulation. The manufacturing method of the liquid fertilizer production method is disclosed.

As another prior art,

Korean Patent Registration No. 0780430 (prior art 2) discloses a "apparatus and method for manufacturing a potting device"

A storage tank (10) in which liquid waste is stored; A water supply pipe (20) connected to the storage tank (10); An oxidant supply means (30) installed on the water supply pipe (20) for supplying an oxidant to the liquid waste supplied to the water supply pipe; A pressure tank (40) connected to the water supply pipe and through which the liquid waste and the oxidant mixed in the water supply pipe are introduced and pressurized; A discharge pipe (60) connected to the pressure tank and selectively discharging oxidized liquid waste in the pressure tank; A sterilizing bath connected to the discharge pipe so as to be grounded, an electrode disposed inside the sterilizing bath to be electrically insulated from the sterilizing bath, a sterilizing bath, and a power supply unit electrically connected to the electrode to supply power, And sterilizing means 70 for sterilizing the liquid waste discharged to the discharge pipe.

The above prior art 1 is a method for controlling the concentration of hydrogen in a raw material tank, supplying the raw material mixture to a sterilization raw material mixing tank, a chemical melting tank, dissolving in a chemical melting tank, fermenting in a fermentation tank, It can be seen that the liquid fertilizer is produced in this order. However, in the prior art 1, liquid fertilizer is produced by using chemicals, so that manure is produced by using artificially chemical agents, although livestock manure and manure generated in the breeding process are naturally generated by liquefaction, Not only the economical efficiency due to the production cost is lowered but also the first level liquid fertilizer is produced by the medicine, so that the liquid fertilizer suitable for the growing stage of the crop can not be supplied.

Prior art 2 also shows that liquid fertilizer is manufactured by sterilizing in a storage tank, a water supply pipe, an oxidizer supply means, a pressure tank, an exhaust pipe, and a sterilization tank.

However, due to the problem that the produced liquid fertilizer can not be supplied step by step according to the growing stage of the crop, it is necessary to check beforehand whether or not the liquid fertilizer can be supplied to the crop There is a problem that it is inconvenient to do. In reality, the liquid produced in each domestic company is supplied only to specific crops, or the liquid is sprayed on the cultivated land before sowing and then the liquid is sown after a certain period of time There is a problem that the efficiency of the liquor is deteriorated.

Korean Patent Registration No. 0874136 Korean Patent Registration No. 0780430

DISCLOSURE OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art. First, the object of the present invention is to provide an apparatus for treating livestock manure by regenerating the manure using the manure generated in the livestock farming,

Secondly, it is possible to provide a method of manufacturing a customized liquid fertilizer of an anaerobic digestive juice for the purpose of supplying liquid fertilizer which can supply customized organic fertilizer according to the type of crop and growth stage.

According to an aspect of the present invention,

And organic waste such as livestock manure is firstly supplied from the storage tank by using a hydraulic pumping device to store organic wastes. The heat of the heating means installed outside the body is transferred to the organic waste, An anaerobic fermenter comprising a first anaerobic fermenter and a second anaerobic fermenter for producing waste biogas by fermentation;

A screen in the form of a net for separating sludge and contaminants of the organic waste producing the biogas from the anaerobic tank and the digester;

A digestive fluid storage tank for storing the digestive juices filtered by the screen and adjusting the flow rate;

 A high-speed fermenter for decomposing the digestive juice supplied from the digestive juice storage tank at a temperature of 50 to 70 ° C;

A sedimentation tank for decomposing the organic matter of the digestive juice in the high-speed fermentation tank and then precipitating the organic matter, thereby precipitating the organic microbial sludge of the digestive juice;

 A flow rate adjusting tank for storing the liquid level of the supernatant separated from the settling tank and adjusting the amount of the liquid level discharged and supplied;

An denitrification tank and a nitrification fermentation tank for performing a nitrification process by reducing nitrogen of the liquid supplied from the flow rate adjusting tank;

A separation membrane for separating the SS component from the denitrification tank and the nitrification fermentation tank so as to prevent the suspended solids from being entrained with the suspended solids component after the nitrification process is performed;

A low concentration liquid storage tank for reducing the concentration of nitrogen so that the concentration of nitrogen is maintained at 0.1-0.15 mol%;

A MAP reaction tank for reducing the nitrogen in the low concentration liquid storage tank and then adding magnesium to react the ammonia nitrogen and phosphorus so that the respective reactions have a molar ratio of 1: 1: 1;

A precipitate separator for separating the liquid and the crystals by forming struvite after allowing each reaction to have a molar ratio of 1: 1: 1 in the MAP reaction tank;

A low-phosphorus low-concentration liquid storage tank for storing a low-phosphorus-low-concentration liquid stored in the settling tank;

The liquid fertilizer stored in the low-concentration liquid fertilizer storage tank is packed for each unit standard to manufacture and supply the liquid fertilizer.

According to the present invention, the livestock processed livestock manure according to the present invention can be processed and packaged for each of the above processes to produce a high-concentration liquid ratio, a high-concentration low-phosphorus acid ratio, a low-concentration liquid ratio, and a low- And it is possible to provide customized liquids by dividing the liquids according to the timing.

According to the present invention as described above, gas produced by producing biogas using livestock manure can be used as a heat source for a power plant, a greenhouse-type boiler for a crop, and an industrial boiler, and the digestion liquid remaining after producing the biogas is processed It is possible to replace the fertilizer supplied by the growing stage of the crop with the fertilizer of the organic natural material. By producing the biogas and the livestock for the housing manure, it is possible to supply the useful thermal energy for industrial use and to supply the high quality organic fertilizer .

FIG. 1 and FIG. 2 are views showing a process of manufacturing a liquid fertilizer using a conventional livestock manure.
Fig. 3 is a process chart showing the whole production process of livestock using the livestock manure of the present invention.
4 is a view showing a process of producing a high concentration liquid of the present invention.
FIG. 5 is a view showing the production process of the low phosphoric acid high concentration liquid of the present invention and the production process of the struvite fertilizer.
6 is a view showing a production process of a low nitric acid solution according to the present invention.
Fig. 7 is a view showing a production process of a low phosphorus low concentration solution of the present invention and a production process of a struvite fertilizer. Fig.

Hereinafter, embodiments of the present invention will be described in detail.

Example 1 Production of low phosphorus low concentration fertilizer and production of struvite fertilizer

Step 1: Fermentation step in an organic waste anaerobic fermenter

The organic wastes from livestock manure and animal husbandry produced in pig farms are transported and stored in a storage tank.

The organic waste of the livestock manure stored in the storage tank may be first treated by a separate crusher or a stirrer before being stored in the storage tank, and then stored in the storage tank. Alternatively, the organic waste may be stored in the storage tank, Waste can be finely shredded.

The organic waste stored in the storage tank as described above is fed to the anaerobic fermentation tank 10 composed of the primary coagulation fermentation tank 11 and the secondary anaerobic fermentation tank 12 so that it can be fermented.

Step 2: Fermentation and biogas production steps

The organic waste stored in the storage tank produces biogas in the fermentation process in the anaerobic fermentation tank 10 comprising the first anaerobic fermentation tank 11 and the second anaerobic fermentation tank 12.

When the organic waste stored in the storage tank is fermented in the first anaerobic fermenter, the anaerobic fermenter 10 is returned to the second anaerobic fermenter after a predetermined time has elapsed, if the organic waste stored in the storage tank is fermented in the first anaerobic fermentation tank 11 and the second anaerobic fermentation tank 12 And fermentation will continue to produce biogas.

A heating means is installed outside the body of the primary anaerobic fermentation tank 11 and the secondary anaerobic fermentation tank 12 so that heat is transferred to the organic waste so that the fermentation of the organic waste stored therein is smoothly fermented.

The anaerobic fermentation tank 10 composed of the primary anaerobic fermentation tank 11 and the secondary anaerobic fermentation tank 12 of the present invention is a device for producing biogas using organic wastes generated from manure wastes and food waste from pig farms and livestock farms to be.

In particular, an anaerobic fermentation tank for activating an organic microorganism that produces biogas is disposed in the organic waste introduced into the anaerobic digestion tank 10 through a storage tank. In order to maintain the optimum pH, the inside of the anaerobic fermentation tank 10 is maintained at an appropriate temperature , And it is flowed up and down and left and right using a separately installed stirring device to maximize the generation conditions of the biogas.

In the anaerobic fermentation tank 10 composed of the first anaerobic fermentation tank 11 and the second anaerobic fermentation tank 12, a heater pipe, which is a heating unit, is installed in the middle part of the body, and a predetermined temperature is applied to the organic waste, So that conditions are formed.

The heater piping (not shown) installed in the anaerobic fermentation tank 10 is preferably installed on the inner circumferential surface of the body. However, the outer pipe or body may be formed as a jacket and installed inside the jacket.

The temperature of the heater pipe, which is the heat generating means provided in the body of the anaerobic fermentation tank 10, can be adjusted to maintain the proper temperature by controlling the supply of hot water.

The temperature of the heater pipe is preferably 30 ° C to 40 ° C. If the temperature of the anaerobic fermenter is automatically adjusted, the hot water is supplied if the temperature is less than 30 ° C, and the hot water is stopped if the temperature is more than 40 ° C .

The hot water is output from the cogeneration device, and the heat generating means of the anaerobic fermenter is circulated and re-input to the cogeneration device to be circulated.

The anaerobic fermentation tank (10) of the present invention is manufactured in a cone shape to easily discharge the organic waste sludge accumulated in the lower portion of the anaerobic fermentation tank (10).

In the anaerobic fermentation tank, biogas (methane gas) is produced during the fermentation of the organic waste, and the produced biogas is separated into a desulfurization device, an ammonia removal device, a primary and secondary siloxane removal device, And high-quality, high-quality biogas is supplied as heat sources for cogeneration power plants and boilers.

Step 3: Separation of fermented organic waste into screens

The organic waste produced in the anaerobic fermentation tank 10 composed of the primary anaerobic fermentation tank 11 and the secondary anaerobic fermentation tank 12 is supplied to the sludge tank 12 through a screen 15 in the form of a net for separating sludge and contaminants from liquid, And the digestive juice.

The sludge, which is an organic waste separated by the screen 15, is sent back to the first anaerobic fermenter or the second anaerobic fermenter and mixed with other organic wastes to undergo a fermentation process, and the separated digestive juice proceeds to the next step.

Fourth step: digestive juice storage and high-speed fermentation step

The digestion liquid separated from the screen is stored in the first digestive juice storage tank and then passed to the high-speed fermentation tank. The digestive juice supplied to the high-speed fermentation tank is supplied to the high-speed fermenter while the flow rate is adjusted in the digestive juice storage tank installed on one side.

The high-speed fermenter is equipped with a heating means and is stored at 50 ° C to 70 ° C for one day, and organic substances in the digestive juice are decomposed.

The temperature of the effluent of the anaerobic fermentation tank (10) is about 30 ° C in the winter, and the amount of heat generated by oxidation and decomposition of organic matter of about 10,000 ppm BOD into the high-speed fermenter is over 25,000 kcal per cubic meter of the digestive juice. ℃ and the pH is about 8.

Therefore, the high concentration solution in which the organic substance is decomposed in the high-speed fermentation tank 10 can be used as fertilizer if necessary. One of the advantages of the liquid fertilizer is that it has a rapid effect, but the soil microorganisms interact with the crops because the crops grow, and the microorganisms in the liquid fertilizer additionally act to strengthen the plant ecosystem. It is more effective to spray the liquid.

In the latter stage of the high-speed fermentation tank, when nitrification of a part of organic nitrogen and ammonia nitrogen is performed, the odor is further abolished and the alkalinity and pH are lowered to about pH 6-7.5.

In the biological treatment process of this process, nitrogen is volatilized into ammonia in some form, and the concentration is lowered, but it is just before nitrification. Various odor materials are oxidized and decomposed, but some ammonia odor can be detected.

Therefore, the reaction at this stage is an organic matter removal reaction, and some nitrogen is synthesized into a cell by carbon assimilation, but it is mainly sprayed with the microbial sludge, and thus some nitrogen is separated, but the nitrogen is not removed.

In other words, the odor, which is an important factor in spraying for high-fermentation after high-speed fermentation, is removed, and includes high concentration microorganisms, high concentration nitrogen, and high concentration of citric acid.

Step 5: High-speed fermentation digestion step

In the process of storing the digestion liquid at 50 ° C. to 70 ° C. for one day in the fourth process, the microorganism particulate sludge precipitates and sinks while the digested organic matter is decomposed and settled while being operated in a high-temperature aerobic digestion system. Only clear organic fertilizer remains as an equalizer.

At this time, the liquid of supernatant water is transferred to the flow rate adjusting tank 20 installed at one side, and the liquid cost is returned to the high-speed fermentation tank 17 to decompose the microorganism.

Step 6: Denitrification and Nitrification Step

An denitrification tank 24 for reducing the nitrogen of the liquid fertilizer supplied from the flow rate adjusting tank 20 for storing the liquid fertilizer liquid stored in the settling tank 19 and regulating the amount of the liquid fertilizer discharged from the denitrification tank 24, (25) The step of reducing nitric acid is performed.

In this denitrification process, the nitrogen concentration is adjusted to 0.1 mol% to 0.2 mol% in the customized solution.

In this process, the main reaction for controlling nitrogen is biological nitrification and denitrification, and the ammonia (NH3) concentration, which is toxic to biological nitrification in the step reaction in the high-speed fermentation tank 17, .

The theory related to biological nitrification is well known as Nitrosomonas , which mainly oxidizes ammonia nitrogen to nitrite nitrogen, and Nitrobacter , which oxidizes nitrite nitrogen to nitrate nitrogen. These microorganisms are autotrophic organisms because heterotrophic organisms acquire energy while oxidizing organic compounds, while energy is derived from inorganic compounds.

Nitrification of ammonia nitrogen consists of two steps. The first step is the conversion of ammoniacal nitrogen to nitrite nitrogen by Nitrosomonas , and the second step is the conversion of nitrite nitrogen to nitrate nitrogen by Nitrobacter . These two steps are represented by the following formulas.

^{_{NH 4 + + 1.5O 2 → NO}} 2 - + H 2 O + 2H + ------ (1)

^{_{NO 2 - + 0.5O 2 → NO}} 3 - --------------- (2)

The above reaction equations (1) and (2) are energy generation reactions. The loss of free energy due to the reaction of equation (1) is observed between 58 and 84 Kcal per mole of ammonia. In the reaction of equation (2), energy is released between 15.4 and 20.9 Kcal per mole of nitrite nitrogen.

Since the critical temperature of nitrifying microorganisms is below 40 ℃, the temperature should be controlled not to rise too much during the summer.

When a part of the required amount of the nitrogen compound is nitrified, it is transferred to the denitrification tank located at the front end of the nitrification tank and the biological denitrification reaction is performed by the microorganism.

Biological denitrification is a process in which nitrate ions are reduced to N ₂ , N ₂ O, and NO. Microorganisms involved in denitrification include Achromobacter , Bacillus , Brevibacterium , Enterobacter, Lactobacillus, Micrococcus, Paracalobactrum, Pseudomonas, and Spirillum . These microorganisms are heterotrophic. They vary in aerobic, flowable anaerobic, anaerobic, but more than 80% of the natural world is known to be anaerobic. These microorganisms use oxygen as an electron carrier to oxidize organic compounds, and oxygen-free breathing in the absence or absence of oxygen, where oxygen (NO ₃ ^- , SO ₄ ^{2 -,} etc.) chemically bonded as final electron acceptors, .

Anoxic condition is distinguished from anaerobic condition when there is no dissolved oxygen (molecular oxygen) and only chemically bonded oxygen exists. The presence of oxygen in the anaerobic state controls the oxygenation of respiration in tuberous anaerobic microorganisms, which is the ultimate electron acceptor, which generates much more energy when using dissolved oxygen than oxygen, which is chemically bonded, so it is usually an anaerobic (anaerobic) Because they prefer dissolved oxygen.

Therefore, dissolved oxygen (molecular oxygen) should not be present for denitration.

Since denitrifying microorganisms belong to heterotrophic bacteria, nutrients (carbon) must be supplied from outside for growth. Materials that can be used as external carbon sources include organic substances such as methanol, acetic acid, methane and sewage. In this process, Using the remaining organic matter (BOD), nitrate nitrogen in the process is denitrified by 500 - 1000ppm to produce 0.1-0.2 mol% of target nitrogen.

Liquor produced in this process can also be used separately.

Seventh Step: Membrane Stage

After the nitrification process is performed in the denitrification tank 24 and the nitrification fermentation tank 25, the separation step is performed in the separation membrane tank 27 in which the SS component is separated so that suspended solids are not introduced together with the suspended solids component do.

In this process, separation membranes are used to produce solid-liquid separation and clean liquor. Since the carbonaceous organic matter is completely removed during the nitrification and denitrification processes, the contamination of the membrane separation tank (27) is minimized, Can be used.

The liquid component passed through the membrane is completely separated from the SS component and the concentration of nitrogen is about 0.1 - 0.15 mol%.

At this time, the concentration of nitrogen should be at least 0.1 mol% of nitrogen even if it is a low concentration liquid. Liquor passing through the membrane separation tank (27) can be used for a side surface cost or a golf course.

The low concentration solution passing through the separation membrane reacts with Mg (OH) 2 to regulate the phosphorus concentration, thereby producing a low concentration low phosphorus solution.

In this process, the main component to be controlled is the phosphorus component, so it can be replaced with calcium hydroxide.

The microbial particulate sludge separated from the separation membrane tank 27 is again transported to the denitrification tank and denitrification is performed again.

Step 8: Low concentration liquid storage and MAP reaction step

The liquid mixture having passed through the separation membrane bath is stored in the low concentration liquid storage tank 28 while the nitrogen concentration is reduced and the concentration of nitrogen is maintained at 0.1-0.15 mol%.

The low concentration solution ratio of the low-concentration liquid storage tank 28 storing the nitrogen-reduced solution was injected into the MAP reaction tank 29 so as to react the post-ammonia nitrogen and phosphorus, so that the respective reactions had a molar ratio of 1: 1: 1 .

Step 9: Production of Struvite fertilizer by precipitation separation and production of low phosphorus low concentration liquid fertilizer

In the MAP reaction tank 29, the respective reactions are made to have a molar ratio of 1: 1: 1 and then precipitated in the precipitation separation tank 30 to form struvite, thereby separating the liquid and the crystal. A low-phosphorus low-concentration liquid fertilizer is formed and stored in the low phosphoric acid low-concentration liquid fertilizer storage tank 33.

The struvite which has been transformed into crystals while being precipitated in the sedimentation separating tank 30 is dehydrated and then packed in a solid strut bite fertilizer 32 to be supplied to the consumer.

The liquid stored in the low concentration liquid storage tank is also packaged in a separate container and supplied to the consumer.

The low-level fertilizer thus produced can be used as an overall fertilizer irrespective of the growth stage of the crop, but it is suitable to be used as a fertilizer for buds, young leaves, and dried crops to be more effective.

≪ Example 2 >

The fast fermentation tank is a high concentration liquid manure production method,

In the process of Embodiment 1,

Step 1: Fermentation step in an organic waste anaerobic fermenter,

Step 2: fermentation and biogas production step,

Step 3: separating the fermented organic waste into a screen,

Step 4: The digestive juice storage and high-speed fermentation step are carried out.

In the digestive juice storage and high-speed fermentation step as the fourth process, the digestive juice separated from the screen is stored in the first digestive juice storage tank 16 and then transferred to the high-speed fermentation tank. The digestive juice supplied to the high-speed fermentation tank 16 is supplied to the high-speed fermentation tank 17 while the flow rate thereof is adjusted in the digestive juice storage tank 16 installed at one side. The heating means is installed and stored at 50 ° C to 70 ° C for 1 day to decompose organic substances in the digestive juices.

As described above, the liquid fertilizer in a state in which organic matter in the digestive juice is decomposed can be stored in the high-concentration liquid fertilizer storage tank 18 in a state in which a high-concentration liquid fertilizer is produced, and packed in a unit packing standard to provide a high-concentration liquid fertilizer to a consumer.

In this case, phosphorus and nitrogen are not reduced, and it is used as a base for organizing the soil by spraying on the cultivated land in winter.

≪ Example 3 > Production method of low phosphoric acid high concentration liquid fertilizer

In the process of Embodiment 1,

Step 1: Fermentation step in an organic waste anaerobic fermenter,

Step 2: fermentation and biogas production step,

Step 3: separating the fermented organic waste into a screen,

Step 4: digestive juice storage and high-speed fermentation step,

Step 5: After the step of digesting the high-speed fermented digested liquid, the microbial sludge in the settling tank is returned to the high-speed fermentation tank 17, and the liquid level supernatant of the settling tank is supplied to and stored in the flow rate adjusting tank 20.

The digestion liquid stored in the flow rate control tank 20 flows into the MAP reaction tank 21 at one side and the flow rate control of the digestive fluid flowing into the MAP reaction tank 21 is controlled by the flow rate control tank 20.

The digestion liquid introduced into the MAP reaction tank 21 is charged with magnesium so as to react with ammonia nitrogen and phosphorous so that the respective reactions are in a molar ratio of 1: 1: 1.

At this time, the temperature of the MAP reactor is 30 ° C to 50 ° C and the reaction time is about 2 minutes.

In the MAP (Magnesium Ammonium Phosphate) reaction tank, the reaction was performed at a molar ratio of 1: 1: 1, followed by precipitation in a settling tank on one side to form a StruBite fertilizer 32, The supernatant is stored in the low-phosphorus high-concentration liquid storage tank (23).

That is, in the digestion liquid reacted in the MAP reaction tank 21, the microbial particulate sludge is precipitated in the sedimentation tank 22, and the crystals of the struvite fertilizer 32 are formed to produce the solid struvite fertilizer, And is stored in the low phosphoric acid high concentration liquid storage tank 23, which can be supplied to the consumer through the packaging. At this time, in the process of passing through the step of low phosphoric acid high concentration liquid, phosphorus concentration of 30-50% of the total content is reduced.

In Example 3 of the present process, a low phosphoric acid high concentration liquid fertilizer and solid struvite fertilizer are produced.

<Example 4> low nitrate manure production method

In the process of Embodiment 1,

Step 1: Fermentation step in an organic waste anaerobic fermenter,

Step 2: fermentation and biogas production step,

Step 3: separating the fermented organic waste into a screen,

Step 4: digestive juice storage and high-speed fermentation step,

Step 5: High-speed fermentation digesting liquid precipitation step,

Step 6: The denitrification and nitrification step can be performed to provide a low quality acid solution.

An denitrification tank 24 for reducing the nitrogen of the liquid fertilizer supplied from the flow rate adjusting tank 20 for storing the liquid fertilizer liquid stored in the settling tank 19 and regulating the amount of the liquid fertilizer discharged from the denitrification tank 24, (25).

In this denitrification process, the nitrogen concentration is adjusted to 0.1% - 0.2% in the customized solution.

At this time, the main reaction to control nitrogen is biological nitrification and denitrification, and ammonia (NH3) concentration, which is toxic to biological nitrification in the first step reaction, is considerably eliminated.

The theory related to biological nitrification is well known as Nitrosomonas , which mainly oxidizes ammonia nitrogen to nitrite nitrogen, and Nitrobacter , which oxidizes nitrite nitrogen to nitrate nitrogen.

These microorganisms are autotrophic organisms because heterotrophic organisms acquire energy while oxidizing organic compounds, while energy is derived from inorganic compounds.

Nitrification of ammonia nitrogen consists of two steps. The first step is the conversion of ammoniacal nitrogen to nitrite nitrogen by Nitrosomonas , and the second step is the conversion of nitrite nitrogen to nitrate nitrogen by Nitrobacter .

In this way, the nitrification fermenter produces 0.1 to 0.2% nitrogen and supplies it to consumers.

Accordingly, the present invention provides a method of producing a liquid fertilizer that meets the requirements of a consumer by combining a high concentration liquid fertilizer (including a microorganism and a small amount of organic matter), a high concentration low phosphoric acid liquid ratio, a standard liquid ratio, a standard low phosphoric acid liquid ratio, a low concentration liquid ratio, And it is possible to produce and sell an additional expensive solid sterilized fertilizer.

In order to energize livestock manure, the biogas generated after methane fermentation is subjected to a post-treatment process through a separate line to supply high-purity, high-quality biogas to a heat source such as a boiler, a cogeneration plant, And the remaining rice bran wastes are used to produce a good quality liquid fertilizer.

The first is to treat food wastes generated from livestock farmers and businesses as environmental pollutants and the second is to produce biogas using organic wastes and supply green energy by supplying them as a heat source for industrial sites. And the third is to supply organic fertilizer (liquid fertilizer) according to the degree of growth of crops.

10: Anaerobic fermenter 11: Primary anaerobic fermenter
12: Secondary anaerobic fermenter 13: Biogas production
14: boiler / power plant heat source 15: screen
16: Digestion liquid reservoir 17: High speed fermentation tank
18: High concentration liquid storage tank 19: Settling tank
20: Flow regulator 21: MAP reaction tank
22: sedimentation tank 23: low phosphorus high concentration liquid storage tank
24: denitrification tank 25: nitrification fermentation tank
26: low quality acid liquid storage tank 27: separation membrane tank
28: Low concentration liquid storage tank 29: MAP reaction tank
30: Precipitation separation tank 31: Dehydration
32: StruBite Fertilizer 33: Low Phosphate Low Concentration Liquid Reservoir

Claims (5)

In an apparatus for producing a liquid using organic wastes such as livestock manure,
A first anaerobic fermenter (11) for supplying and storing organic wastes from a storage tank, allowing the heat of the heating means provided outside the body to transfer to organic wastes, and allowing organic wastes to be fermented by the transferred heat to produce biogas; 2 anaerobic fermenter (12);
A screen 15 in the form of a net for separating sludge and contaminants from the organic waste produced in the anaerobic fermentation tank 10 and the digestive juice;
A digestive juice reservoir (16) adapted to store the excreted juice filtered by the screen (15) and adjust the flow rate;
A high-speed fermentation tank 17 for decomposing the digestive juice supplied from the digestive juice storage tank 16 at a temperature of 50 to 70 ° C;
A sedimentation tank 19 for decomposing the organic matter of the digestive juice in the high-speed fermentation tank 17 and precipitating the precipitated organic microbial sludge, thereby separating the organic microbial sludge of the digestive juice into a liquid mixture;
A flow rate adjusting tank 20 for storing the liquid level of the supernatant liquid separated from the settling tank 19 and adjusting the amount of the liquid level discharged and supplied;
An denitrifying tank (24) and a nitrification fermentation tank (25) for performing a nitrification process by reducing nitrogen in the liquid fertilizer supplied from the flow rate adjusting tank (20);
A separation membrane (27) for separating the SS component from the suspended solids after the nitrification process in the denitrification tank (24) and the nitrification fermentation tank (25) so as to prevent entrainment of SS suspended solids;
The liquid passing through the separation membrane (27) includes a low concentration liquid storage tank (28) for reducing the concentration of nitrogen so that the concentration of nitrogen is maintained at 0.1-0.15 mol%;
After the nitrogen is reduced in the low concentration liquid storage tank 28, magnesium is injected to react with ammonia nitrogen and phosphorus so that ammonia nitrogen, phosphorus and magnesium are mixed uniformly at a molar ratio of 1: 1: 1 A reaction tank 29;
In order to form struvite fertilizer (32) after dewatering (31) the precipitate after allowing the reaction of ammonia nitrogen, phosphorus and magnesium to have a molar ratio of 1: 1: 1 in the MAP reaction tank (29) And a crystallization separator (30);
A low-phosphorus-low-concentration liquid storage tank 33 for storing a low-phosphorus-low-concentration liquid stored in the sedimentation separation tank 30;
And the liquid fertilizer stored in the low concentration liquid storage tank is packed according to unit specifications. A method for producing a liquid using organic wastes such as livestock manure,
Fermenting an organic waste composed of livestock manure in an anaerobic fermentation tank (10) comprising a first anaerobic fermentation tank (11) and a second orbital fermentation tank (12);
A fermentation and biogas production step of post-treating the biogas produced in the fermentation process in the anaerobic fermentation tank 10 and supplying the biogas to a heat source through a separate line;
Separating the organic waste producing the biogas into a screen (15);
After the digestive juice separated by the screen 15 is stored in the digestive juice storage tank 16, the digestive juice supplied with its flow rate adjusted in the digestive juice storage tank 16 is fermented in the high-speed fermentation tank 17 at a temperature of 50-70 ° C for one day High-speed fermentation so as to produce a high-concentration liquid;
Rapidly fermenting the digested liquid in the high-speed fermentation tank (17) to precipitate organic substances in the sedimentation tank (19);
The digestion liquid in which the organic matter is decomposed and precipitated in the settling tank 19 is selectively produced in a low phosphoric acid high concentration liquid ratio and the liquid level supernatant of the settling tank in which the liquid fertilizer in the high speed fermentation tank is set is stored in the flow rate adjusting tank 20, Reducing nitric acid in the nitrification fermentation tank 25;
Selectively allowing the digestive juice fermented in the digestion liquid denitrification tank (24) and the nitrification fermentation tank (25) to be selectively produced at a low quality acidic liquid ratio and precipitating and digesting digestion liquid fermented in a nitrification fermentation tank into a membrane separation tank (27);
Storing the digestion liquid separated from the microbial sludge in the separation membrane tank (27) in the low concentration liquid storage and reacting the digested liquid in a condition for making crystals in the MAP reaction tank (29);
The digested sludge reacted in the MAP reaction tank 29 is subjected to microbial sludge determination in a sedimentation separation tank to produce solid struvite fertilizer 32. At the same time, the clear liquid of the constant amount is stored in the low phosphoric acid low concentration liquid storage tank, Phosphoric acid low-concentration liquid fertilizer is produced. 3. The method of claim 2,
The high-concentration liquid production is carried out in an anaerobic fermentation tank (10) consisting of a first anaerobic fermentation tank (11) and a second anaerobic fermentation tank (12);
The organic waste is fermented in the anaerobic fermentation tank (10) to produce biogas:
Separating the fermented organic waste after production of the biogas into a screen (15);
The digestion liquid separated by the screen 15 is stored and fermented in a high-speed fermentation tank 17 at 50 ° C to 70 ° C for one day, stored in a high-concentration liquid storage tank 18, packed in a unit packing standard, Wherein the anaerobic digestive juice is supplied to the anaerobic digestive juice. The method according to claim 2, wherein
The production of the low phosphoric acid high concentration liquid is performed in an anaerobic fermenter (10) comprising the first anaerobic fermentation tank (11) and the second anaerobic fermentation tank (12);
The organic waste is fermented in the anaerobic fermentation tank (10) to produce biogas:
Separating the fermented organic waste after production of the biogas into a screen (15);
Storing the digestive juice separated by the screen (15) and fermenting it in a high-speed fermenter at 50 ° C to 70 ° C for 1 day;
Rapidly fermenting the digested liquid in the high-speed fermentation tank (17) to precipitate organic substances in the sedimentation tank (19);
The supernatant of the digestion liquid in which the organic matter is decomposed and precipitated in the settling tank 19 is stored in the flow rate adjustment tank 20 and the digested solution thereof is reacted with the ammonia nitrogen and phosphorus in the MAP reaction tank 21 installed at one side of the flow rate adjustment tank 20 Reacting magnesium in the MAP reaction tank 21 so that a crystal is formed so as to have a molar ratio of 1: 1: 1 for each reaction;
A step of determining the microbial sludge reacted in the MAP reaction tank 21 with the microbial sludge in the sedimentation tank 22 and dewatering it to produce solid struvite fertilizer 31 and the liquid fertilizer constant of the settling tank 22 is the low- (23) to produce a low-phosphoric acid high-concentration liquid fertilizer. 3. The method of claim 2,
The production of the low-quality acid solution is performed in an anaerobic fermentation tank (17) consisting of a first anaerobic fermentation tank (11) and a second anaerobic fermentation tank (12);
The organic waste is fermented in the anaerobic fermentation tank (17) to produce biogas:
Separating the fermented organic waste after production of the biogas into a screen (15);
Storing the digestive juice separated by the screen (15) and fermenting it in a high-speed fermentation tank (17) at 50 ° C to 70 ° C for 1 day;
Rapidly digesting the digested liquid fermented in the high-speed fermentation tank (17), causing the organic matter to be decomposed in the sedimentation tank (19) and precipitating in the sedimentation tank (19);
The digestion liquid in which the organic matter is decomposed and precipitated in the settling tank 19 is stored in the flow rate adjusting tank 20 and the nitrate is reduced in the denitrification tank 24 in the denitrification tank 24 and fermented in the nitrifying fermentation tank 25, 0.2 mol%, based on the total weight of the anaerobic digestion solution.

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