KR100976933B1 - Livestock Wastewater Treatment Process by Converting Dissolved Ammonia into Liquid Compost, and Organic wastes into Methane Gas: Method and Apparatus - Google Patents

Abstract

The present invention comprises a first step of filtering foreign matter present in the livestock wastewater for smooth operation of the subsequent process and protection of the mechanical device; A second step of selecting and separating solid components remaining in the livestock wastewater; A third step of agglomerating particulate solid components not separated from the livestock wastewater; A fourth step of filtering the solid component agglomerated in the livestock waste water under pressure using a filtration membrane; A fifth step of storing solids of the solid component separated in the second and fourth steps; A fifth step of preparing the solid to compost; A sixth step of decomposing organic components and generating methane gas in a anaerobic state in which livestock wastewater from which solid components are removed is anaerobic; A seventh step of adjusting acidity of the livestock wastewater by injecting sodium hydroxide into the livestock wastewater from which methane gas is discharged; An eighth step of heating the livestock waste water of which the acidity is adjusted to a predetermined temperature in a heat exchanger; A ninth step of separating the heated livestock wastewater into a liquid consisting of wastewater and air and ammonia; A tenth step of purifying and discharging the separated liquid wastewater; And an eleventh step of preparing a liquid fertilizer using the separated gas; and a livestock wastewater purification treatment method and apparatus for converting high concentration ammonia and organic matter contained in the livestock wastewater into liquid fertilizer and methane gas, respectively. .

Livestock Wastewater, Treatment, Anaerobic Digestion, Methane, Ammonia, Liquid Fertilizer, Manufacturing, Method, Apparatus

Description

Livestock Wastewater Treatment Process by Converting Dissolved Ammonia into Liquid Compost, and Organic wastes into Methane Gas: Method and device for converting high concentrations of ammonia and organic substances in livestock waste into liquid fertilizer and methane gas Apparatus}

The present invention relates to a livestock wastewater purification method and apparatus for converting high concentration ammonia and organic matter contained in livestock waste into liquid fertilizer and methane gas, and more particularly, a high concentration contained in solid waste liquid separated from livestock wastewater. Ammonia and organic substances are converted into liquid fertilizer and methane gas through ammonia degassing and anaerobic digestion process, respectively. It relates to a livestock wastewater purification method and apparatus for converting each.

Livestock wastewater contains high concentrations of pollutants, which are hundreds of times more than ordinary household sewage, which makes it difficult to treat economically and reliably as a general sewage and wastewater treatment facility. Solids, organic matter and nitrogen concentrations in livestock wastewater not only hinder the efficiency of the water treatment process but also make it difficult to maintain the facility. However, if these solids, organics and nitrogen can be selectively separated from the waste water, not only are they able to remove pollutants in the waste water, but they can also be recycled to resources.

Solids contained in livestock waste account for about 80% of the total pollutant load, so the solid-liquid separation process that separates the wastewater into solids and liquids plays an important role in the livestock wastewater treatment system. Existing livestock wastewater treatment systems are agglomerated and centrifuged to separate high concentration wastewater into solid and liquid. However, in this case, the suspended pollutant in the solid-liquid separated liquid is low efficiency to reach thousands of ppm and the water content of the separated solid is about 80%, which is difficult to use as a raw material of the compost.

The filter press apparatus for separating solid solution by applying high pressure to the filter cloth by using an inflow pump has advantages of having a very low moisture content of the dehydrated solid, a desorbent is clean, excellent capturing ability of solid matter, and convenient operation. However, when filtering in a state in which agglomeration is not properly performed due to the characteristics of the livestock wastewater sludge, it is difficult to separate the solid liquid smoothly due to poor dehydration of solids, clogging of the filter cloth, and frequent washing of the filter cloth.

In the case of organic substances contained in waste water, anaerobic digestion processes that convert to methane using biological methods are widely used. However, in the case of waste solids with a lot of suspended solids, problems such as mechanical failure, scum occurrence, clogging of pipes and pumps in maintenance of the anaerobic tank are often caused by failure. In addition, in order to successfully apply the anaerobic digester for livestock wastewater, it is known that the suspended solids must be removed first through solid solid-liquid separation.

Livestock wastewater generally contains thousands of ppm of high ammonia nitrogen. In the case of such a high concentration of ammonia nitrogen, biological treatment is limited and high ammonia nitrogen concentrations have been reported to inhibit the activity of the nitrogen-removing microorganism itself. Therefore, as a solution, a method of lowering the concentration by diluting the wastewater and a physicochemical denitrification method are used. There are many physicochemical denitrification methods, but in the case of air stripping, the material transfer triggered by the principle of equilibrium concentration concentration is the key mechanism. It has However, in spite of various advantages, there are problems due to secondary treatment of deaerated ammonia gas, which makes it difficult to apply the site.

The livestock dumping of livestock wastes is rapidly increasing from 760,000 tons in 2000 to 2.43 million tons in 2004, which causes serious pollution of the marine environment. Furthermore, since 2012, the dumping of domestic organic wastewater has been banned under the London Convention. Therefore, it is urgent to develop land treatment methods for livestock wastewater.

Therefore, the present invention was created to solve the above problems, by converting the high concentration ammonia and organic substances contained in the solid wastewater separated from the livestock wastewater by converting the liquid fertilizer and methane gas through ammonia degassing and anaerobic digestion process, respectively. It is an object of the present invention to provide a livestock wastewater purification treatment method and apparatus for converting high concentration ammonia and organic matter contained in livestock wastewater, which can be recovered at the same time, into a liquid fertilizer and methane gas.

The object of the present invention as described above is a first step of filtering foreign matter present in the livestock wastewater for smooth operation of the subsequent process and protection of the mechanical device; A second step of selecting and separating solid components remaining in the livestock wastewater; A third step of agglomerating particulate solid components not separated from the livestock wastewater; A fourth step of filtering the solid component agglomerated in the livestock waste water under pressure using a filtration membrane; A fifth step of storing solids of the solid component separated in the second and fourth steps; A fifth step of preparing the solid to compost; A sixth step of decomposing organic components and generating methane gas in a anaerobic state in which livestock wastewater from which solid components are removed is anaerobic; A seventh step of adjusting acidity of the livestock wastewater by injecting sodium hydroxide into the livestock wastewater from which methane gas is discharged; An eighth step of heating the livestock waste water of which the acidity is adjusted to a predetermined temperature in a heat exchanger; A ninth step of separating the heated livestock wastewater into a liquid consisting of wastewater and air and ammonia; A tenth step of purifying and discharging the separated liquid wastewater; And an eleventh step of preparing a liquid fertilizer using the separated gas; and may be achieved by a livestock wastewater purification treatment method for converting high concentration ammonia and organic substances contained in the livestock wastewater into liquid fertilizer and methane gas, respectively. .

As another category, an object of the present invention is to provide a drum screen for filtering foreign substances contained in livestock wastewater to be imported; A centrifugal separator for separating and separating the solid material in the livestock wastewater from which foreign matters are removed using centrifugal force; An agitation agitation tank for agglomerating the solid components remaining in the centrifuge; A filter press for filtering the livestock wastewater including the solid component aggregated in the coagulation stirring tank under pressure using a filtration membrane; Anaerobic digestion tank for decomposing organic components and generating methane gas by using microorganisms in the anaerobic state of livestock waste water that has passed through the filter press; PH adjusting tank for adjusting the acidity of the livestock waste water passed through the anaerobic digestion tank; A heat exchanger for heating the livestock wastewater of which the acidity is adjusted in the pH adjustment tank to a predetermined temperature; An ammonia degassing column for separating livestock wastewater heated to a predetermined temperature in the heat exchanger into air and separating the liquid wastewater into a gas consisting of air and ammonia; A blower for supplying air to the ammonia degasser; A biological denitrification tank having a biological treatment process for removing nitrogen components remaining in the liquid wastewater separated from the ammonia degassing column; An MBR tank for removing residual organic matter remaining in the liquid wastewater passing through the biological denitrification tank by using an immersion type membrane; An ozone reactor to oxidize and decompose the hardly decomposable substances remaining in the liquid wastewater passing through the MBR tank to meet the discharged water quality standard; An ammonia absorption tower for collecting ammonia from the ammonia degassing tower and reacting the ammonia with an aqueous phosphate solution to prevent the discharge of ammonia into the atmosphere; And a liquid fertilizer manufacturing apparatus for putting a fertilizer component in accordance with the fertilizer process standard into an aqueous solution absorbing the ammonia collected by the ammonia absorption tower and stirring the liquid ammonia and organic substances contained in the livestock wastewater. It can be achieved by the livestock wastewater purification apparatus for converting to and methane gas respectively.

According to the present invention there is an effect that can effectively treat wastewater by using the advantages of biological, chemical and physical methods.

In addition, ammonia contained in compost and liquid wastewater is reduced to 300 ppm or less by utilizing livestock wastewater, and organic matter, which is a pollutant contained in the wastewater, is converted into inorganic methane gas. This has the effect of preventing environmental pollution.

In addition, liquid fertilizer and methane gas made from by-products generated by treating livestock wastewater can be used as valuable oil resources through recovery. If you cultivate crops using liquid fertilizers, you can cultivate the crops organically because you can hang the ground and prevent the growth of pests. In addition, in the case of methane gas, it can be used as a fuel to replace the fossil fuel. This has the effect of generating additional income while carrying out the purification of the livestock wastewater.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

<Livestock wastewater purification method for converting high concentration ammonia and organic substances in livestock waste into liquid fertilizer and methane gas, respectively>

1 is a schematic flowchart of a livestock wastewater purification method for converting high concentration ammonia and organic matter contained in livestock wastewater into liquid fertilizer and methane gas according to the present invention. As shown in FIG. 1, first, a certain amount of livestock wastewater 10 to be treated is collected and stored before purification and preparation of fertilizer and methane gas.

Next, to filter the large foreign matter present in the livestock wastewater (10) for smooth operation of the subsequent process and protection of the machine (S100). At this time, the removal of foreign substances is removed by putting the livestock waste water 10 to the drum screen 200.

Next, in order to reduce the load of pollutants in the livestock wastewater 10 and to increase the efficiency of the treatment process and to reduce costs thereafter, the livestock wastewater 10 is introduced into the centrifugal separator 300 by using the centrifugal force for the livestock wastewater 10. The solids 20 contained therein are selected and separated (S200).

Next, agglomerated particulate solids 20 remaining in the livestock wastewater 10 without being separated by the centrifuge 300 (S300). If the particulate solids 20 remaining in the livestock wastewater 10 do not aggregate, the fine solids 20 do not block the filtration membrane of the filter press 500 which is a subsequent process, thereby failing to achieve high solid-liquid separation efficiency. Because. Agglomeration of these particulate solids 20 takes place in the coagulation stirring tank 400. At this time, in order to facilitate coagulation of the particulate solid 20, a polymer coagulant and a polyaluminum chloride are added to the coagulation stirring tank 400.

Next, in the flocculation agitator 400 to reduce the pollutant load in the livestock wastewater 10, to improve the efficiency and cost of the subsequent treatment process, and to sort and separate finer pollutant incidence than in the centrifugation process. The livestock wastewater 10 in which the particulate solid 20 is agglomerated is pressurized using the filter press 500. At this time, the livestock wastewater 10 is filtered through the filtration membrane (S400).

The following process is divided into the process of treating the livestock wastewater 10 separated from the filter press 500 and the solids 20 separated from the centrifuge 300 and the filter press 500.

Here, the solids 20 separated from the centrifuge 300 and the filter press 500 are separated and stored in the dewatered sludge storage tank 600 (S510). At this time, the water content of the separated solid 20 is 60% to 70%.

Next, the compost 30 is manufactured using the solid 20 stored in the dewatered sludge storage tank 600 (S520).

The livestock wastewater 10 separated from the filter press 500 is introduced into the anaerobic digester 700. The anaerobic microorganisms in the anaerobic digester 700 make organic substances in the livestock wastewater 10 into organic acids, and then decompose the organic acids into methane (CH ₄ ), carbon dioxide (CO ₂ ), and water (H ₂ O) (S600). ). In this process, the concentration of organic pollutants in the livestock wastewater 10 is reduced, and methane gas generated with this can be separated and used as an energy source. The livestock wastewater 10 which has undergone the above-described process includes ammonia 50 having a concentration of 2,000 ppm to 4,000 ppm.

Next, the livestock wastewater 10 having reduced organic pollutants is brought into the pH adjusting tank 800, and sodium hydroxide (NaOH) is added to adjust the acidity of the imported livestock wastewater 10 (S700). At this time, the amount of sodium hydroxide to be added to the pH adjustment tank 800 so that the acidity of the livestock wastewater 10 is pH 10 to pH 12. Since ammonium ions (NH ₄ ⁺ ) contained in the livestock wastewater 10 are not degassed, the ammonium ions contained in the livestock wastewater 10 must be converted to ammonia 50. As the pH increases, the ammonium ions contained in the livestock wastewater 10 are converted into ammonia (NH ₃ ) 50 form that can be degassed. For this reason, the higher the pH of the livestock wastewater 10, the easier deaeration of the ammonia 50. For example, the ratio of ammonium ion to ammonia 50 at pH 7 and pH 11 is 99.4: 0.6 and 1.7: 98.3, respectively.

Next, the livestock wastewater 10 whose acidity is adjusted is moved to the heat exchanger 900. As the temperature rises, solubility of gas in the liquid decreases, so that deaeration of ammonia 50 is easier. Therefore, the livestock wastewater 10 moved to the heat exchanger 900 raises the temperature of the livestock wastewater 10 to 50 ° C. to 70 ° C. using heat generated from the boiler (S800). Preferably, the livestock wastewater 10 is heated to about 60 ℃.

Next, the livestock wastewater 10 heated to about 60 ° C. is moved to the ammonia degassing tower 1000. The heated livestock wastewater 10 is introduced into an upper one side of the ammonia degassing tower 1000, and the air 40 supplied from the blower 1050 is introduced from the lower part of the ammonia degassing tower 1000. At this time, the flow rate of the air 40 supplied from the blower 1050 is preferably 1700 times to 2400 times the flow rate of the livestock wastewater 10 introduced into the ammonia degassing tower 1000. Thus, the livestock wastewater 10 and the air 40 respectively introduced into the ammonia degassing tower 1000 meet the livestock wastewater 10 flowing from the upper portion and the air 40 rising from the lower portion of the liquid wastewater 10 'and the air. 40 and separated into a gas consisting of ammonia (50) (S900). At this time, the livestock wastewater 10 is sprayed on the ammonia degassing tower 1000, and the reason for flowing the gas containing air 40 and ammonia 50 from the bottom to the top is to mass transfer while maximizing the contact efficiency of the gas To cause. In addition, a filling medium 1100 is filled in the ammonia degassing tower 1000 to increase contact efficiency by dispersing liquid and gas. The material of the filling medium 1100 may be a material having high chemical resistance such as stainless steel, plastic, or ceramic.

The following process is divided into a process of treating a gas consisting of the liquid wastewater 10 'and the ammonia 50 and the air 40 separated from the ammonia degassing tower 1000, respectively.

Here, the steps of purifying and discharging the liquid wastewater 10 'separated from the ammonia degassing tower 1000 are as follows (S1000).

The liquid wastewater 10 ′ separated from the ammonia degassing tower 1000 is introduced into the biological denitrification tank 1200. In the biological denitrification tank 1200, nitrogen components remaining without being removed in the above-described steps are removed using a biological treatment process using microorganisms (S1010). Here, the biological denitrification tank 1200 includes an aeration tank 1210 for converting ammonia nitrogen to nitrate nitrogen, and an oxygen-free tank 1220 for converting and removing nitrate nitrogen converted from the aeration tank 1210 to nitrogen gas.

Next, the liquid wastewater 10 ′ from which nitrogen is removed is introduced into the MBR tank 1300. The MBR tank 1300 has a structure capable of maintaining microorganisms at a high concentration by using an erosion membrane, and efficiently removes residual organic matter by high concentration of microorganisms (S1020). At this time, in the MBR tank 1300, it is recommended to use the membrane integrated sewage wastewater treatment method (HANT method: Hyundai Advanced Nutrient Treatment). The membrane integrated wastewater advanced treatment method is a biologically advanced treatment method for simultaneously removing organic matter, nitrogen, and phosphorus in the wastewater.

Next, the liquid wastewater 10 ′ from which residual organic matter is removed is introduced into the ozone reactor 1400. The liquid wastewater 10 'is composed of an ozone contact tank 1410 for injecting ozone and reacting with the liquid wastewater 10' and an activated carbon tank 1420 for filtering the liquid wastewater 10 'with activated carbon ( Passing 1400 and oxidizes difficult to decompose biologically decomposable substances remaining in the liquid wastewater 10 '(S1030). As such, the liquid wastewater 10 'that has passed through the ozone reactor 1400 is purified to meet the effluent 10 "water quality standard.

Finally, the effluent 10 ″ purged to meet the water quality standard of the effluent 10 ″ is discharged to complete the treatment of the liquid waste water 10 ′ (S1040).

And the step of manufacturing the fertilizer using a gas containing ammonia 50 and the air 40 separated in the ammonia degassing tower 1000 as follows (S1100).

First, the gas separated from the livestock wastewater 10 moves to the ammonia absorption tower 1500 to prevent the ammonia 50 contained in the gas from being discharged into the atmosphere. A gas containing ammonia 50 and air 40 is introduced into the lower part of the ammonia absorption tower 1500, and an aqueous solution of phosphoric acid (H ₃ PO ₄ +) supplied from the aqueous solution of the phosphoric acid solution tank 1600 at the upper part of the ammonia absorption tower 1500. H ₂ O) (60) is injected. At this time, the concentration of the injected phosphoric acid solution 60 is a phosphoric acid content of 8% to 10%. The injected phosphoric acid aqueous solution 60 absorbs ammonia 50 in the gas rising from the lower portion of the ammonia absorption tower 1500, and the remaining air 40 rises upward and is discharged to the outside of the ammonia absorption tower 1500 (S1110). ). Here, the aqueous phosphoric acid solution 60 is sprayed onto the ammonia absorption tower 1500 using a spray to spread the aqueous phosphoric acid solution 60 to a wide range so as to smoothly absorb the ammonia 50 contained in the gas. In addition, the ammonia absorption tower 1500 also includes the same filling medium 1100 as the ammonia degassing tower 1000.

Next, when the aqueous phosphoric acid solution 60 reacts with the ammonia 50 to reach a nitrogen content of about 7% to 9% and phosphorus 2% to 3%, the aqueous solution in which the ammonia is absorbed in the ammonia absorption tower 1500 ( 70) is discharged to the reservoir (S1120). At this time, the total amount of nitrogen, water-soluble phosphoric acid or water-soluble screening at least two or more of the total amount is at least 10%, the content of the guarantee component for each component is 1% or more. At this time, the acidity of the aqueous solution 70 absorbed ammonia 50 is preferably pH 6 to pH 7.

Next, the aqueous solution 70 absorbing ammonia 50 is stored in a liquid fertilizer storage tank or transferred to the liquid fertilizer manufacturing apparatus 1700, and then sulfuric acid to promote fruit growth and improve the performance of the liquid fertilizer 80. Potassium (K ₂ SO ₄ ) and a number of trace fertilizer components are added to complete the liquid fertilizer (80). At this time, the trace amount of the fertilizer component to be added includes at least two or more of goto, manganese, boron, iron, molybdenum, zinc, copper or lime. Here, the above-mentioned trace fertilizer component should include the following assurance component content. 1.0% water soluble goto, 0.1% manganese soluble, 0.04% water soluble boron, 0.1% iron soluble, 0.0005% water soluble molybdenum, 0.05% water soluble zinc, 0.05% water soluble copper and 1.0% water soluble lime. In addition, the liquid fertilizer 80 should not exceed the following ranges of sulfur oxides, arsenic, nitrous acid, biuretic nitrogen and sulfamic acid, which are harmful components, with respect to 1% of the total content of nitrogen, phosphoric acid, and garlic component. The maximum value of the above-mentioned harmful components is 0.005% of sulfur oxides, 0.004% of arsenic, 0.02% of nitrous acid, 0.01% of biuretic nitrogen, and 0.005% of sulfamic acid with respect to 1% of the total content of nitrogen, phosphoric acid, and girly components.

In addition, the liquid fertilizer thus prepared is concentrated ammonia (50) to include ammonia (50) in a concentration of 90,000ppm to 110,000ppm.

Finally, the finished liquid fertilizer 80 is packaged and shipped by dividing the liquid fertilizer 80 into a predetermined capacity.

<Livestock wastewater purification system for converting high concentration ammonia and organic substances in livestock waste into liquid fertilizer and methane gas, respectively>

2 is a schematic configuration diagram of a livestock wastewater purification apparatus for converting high concentration ammonia and organic matter contained in livestock wastewater into liquid fertilizer and methane gas according to the present invention.

Livestock manure import tank 100 according to the present invention is a device for agglomeration and storage of a predetermined amount of livestock manure before the livestock wastewater (10) to be treated to enter the facility for purification and fertilizer and methane gas.

The drum screen 200 according to the present invention is a device for smooth operation of the subsequent process and protection of the mechanical device, and is a device for filtering large foreign matter present in the livestock wastewater 10 to be treated.

Centrifuge 300 according to the present invention is a device for separating the solids 20 contained in the livestock wastewater 10, the livestock wastewater by injecting the livestock wastewater 10 into the cylinder rotating at high speed by using a centrifugal force (10) It is a device for sorting and separating the solids 20 contained therein. The centrifuge 300 is preferably used a centrifuge 300 commonly used in the art. And it is preferable to use a high speed centrifuge 300 that rotates at high speed.

Agglomeration agitator tank 400 according to the present invention is a device for agglomerating particulate solids 20 that cannot be separated through a high-speed centrifugation process, and is a device for agitating livestock wastewater 10, a polymer flocculant, and polyaluminum chloride. .

The filter press 500 according to the present invention is a device for filtering the particulate solid 20 aggregated in the coagulation stirring tank 400. The filter press 500 is composed of a filtration membrane for filtering the aggregated solid 20 and a pressurizing device for pressurization.

Dewatered sludge storage tank according to the present invention is a device for storing the dewatered sludge filtered in the centrifuge 300 and filter press (500). The dehydrated sludge thus stored is composted (30) through a drying process.

The anaerobic digestion tank 700 according to the present invention is an apparatus for decomposing organic components and generating methane gas by a biological method using microorganisms in the anaerobic state of livestock wastewater 10 that has passed the filter press 500 process.

PH adjustment tank 800 according to the present invention is a device for adjusting the acidity of the livestock wastewater 10 by stirring by adding sodium hydroxide to the livestock wastewater 10 is introduced from the anaerobic digestion tank (700). Ammonium ions contained in the livestock wastewater 10 introduced into the pH adjusting tank 800 are converted into ammonia 50 which is easily degassed by reacting with sodium hydroxide.

The heat exchanger 900 according to the present invention is a device for heating the livestock wastewater 10 to a predetermined temperature by using the heat generated from the boiler for the livestock wastewater 10 whose acidity is adjusted in the pH adjusting tank 800. At this time, the heat generated in the boiler is preferably adjusted to a temperature capable of heating the livestock waste water 10 to 50 ℃ to 70 ℃.

In the ammonia degassing tower 1000 according to the present invention, a passage through which the livestock wastewater 10 is introduced is formed on one side of the upper side, and a passage through which air 40 is generated from the blower 1050 is formed on the lower side of the upper side. One side of the surface is formed with a discharge port through which the degassed gas from the livestock wastewater (10). In addition, a filling medium 1100 is provided in the ammonia degassing tower 1000 to improve contact efficiency by dispersing liquid and gas. The material of the filling medium 1100 may be a material having high chemical resistance, preferably stainless steel, plastic, or ceramic.

The blower 1050 according to the present invention is a device for supplying air 40 for degassing the ammonia 50 contained in the livestock wastewater 10 in the ammonia degassing tower 1000.

The biological denitrification tank 1200 according to the present invention is a device in which a biological treatment process is performed to remove nitrogen components remaining in the liquid wastewater 10 ′ separated from the ammonia degassing tower 1000. The biological denitrification tank 1200 includes an aeration tank 1210 for converting ammonia nitrogen to nitrate nitrogen and an anoxic tank 1220 for converting nitrate nitrogen converted from the aeration tank 1210 to nitrogen gas.

The MBR tank 1300 according to the present invention is a device for removing residual organic matter remaining in the liquid wastewater 10 ′ passing through the biological denitrification tank 1200. The MBR tank 1300 is provided with an erosion membrane to maintain microorganisms at a high concentration.

The ozone reactor 1400 according to the present invention is a device that chemically oxidizes and decomposes biodegradable materials that are not biologically treated. The ozone reaction tank 1400 includes an ozone contact tank 1410 for injecting ozone and reacting with the liquid waste water 10 'and an activated carbon tank 1420 having activated carbon for filtering the liquid waste water 10'.

In the ammonia absorption tower 1500 according to the present invention, a passage through which a gas containing air 40 and ammonia 50 separated from the ammonia degassing tower 1000 is introduced is formed at one lower side thereof, and is included in the gas at the upper one side thereof. A passage through which the aqueous phosphoric acid solution 60 for absorbing the ammonia is introduced is formed. In addition, one side of the upper surface of the ammonia degassing tower 1000 is formed with a discharge port through which the air 40 is discharged except for the ammonia 50 absorbed in the aqueous phosphate solution 60. The inside of the ammonia absorption tower 1500 is provided with the same filling medium 1100 as that provided in the ammonia degassing tower 1000 described above.

Liquid fertilizer manufacturing apparatus 1700 according to the present invention by inputting a fertilizer component in accordance with the fertilizer regulations in the aqueous solution 70 absorbed ammonia 50 in the ammonia absorption tower 1500 to prepare a liquid fertilizer (80) Device.

As described above, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

The following drawings, which are attached in this specification, illustrate the preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention, and therefore, the present invention is limited only to the matters described in the drawings. It should not be interpreted.

1 is a schematic flowchart of a livestock wastewater purification method for converting high concentration ammonia and organic matter contained in livestock wastewater into liquid fertilizer and methane gas, respectively, according to the present invention;

2 is a schematic configuration diagram of a livestock wastewater purification apparatus for converting high concentration ammonia and organic matter contained in livestock wastewater into liquid fertilizer and methane gas according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: livestock wastewater 10 ': liquid wastewater

10 ": effluent 20: solids

30: compost 40: air

50: ammonia 60: phosphoric acid aqueous solution

70: aqueous solution absorbed ammonia 80: liquid fertilizer

100: livestock manure import tank 200: drum screen

300: centrifuge 400: coagulation stirring tank

500: filter press 600: dewatered sludge storage tank

700: anaerobic digestion tank 800: pH adjusting tank

900 heat exchanger 1000 ammonia degassing tower

1050 Blower 1100 Filling Medium

1200: biological denitrification tank 1210: aeration tank

1220: Anaerobic tank 1300: MBR tank

1400: ozone reactor 1410: ozone contact tank

1420: activated carbon tank 1500: ammonia absorption tower

1600: aqueous solution of phosphoric acid storage tank 1700: liquid fertilizer manufacturing apparatus

Claims (25)

A first step (S100) of filtering foreign matter present in the livestock wastewater 10 for smooth operation of the subsequent process and protection of the mechanical device; A second step (S200) of selecting and separating the solids 20 remaining in the livestock wastewater 10; A third step (S300) of agglomerating particulate solids 20 not separated from the livestock wastewater 10; A fourth step (S400) of filtering the solids 20 aggregated in the livestock wastewater 10 using a filtration membrane in a pressurized state; A fifth step (S510) of storing the solids 20 of the solid component separated in the second step (S200) and the fourth step (S400); A fifth step (S520) of manufacturing the solid 20 into compost 30; A sixth step (S600) of decomposing organic components and generating methane gas by a biological method using microorganisms in the anaerobic state of the livestock wastewater 10 from which the solids 20 are removed; A seventh step of adjusting acidity of the livestock wastewater 10 by adding sodium hydroxide to the livestock wastewater 10 from which the methane gas is discharged (S700); An eighth step (S800) of heating the livestock wastewater (10) whose acidity is adjusted to a predetermined temperature in a heat exchanger (900); A ninth step of separating the heated livestock wastewater 10 into a gas consisting of liquid wastewater 10 'and air 40 and ammonia 50 (S900); A tenth step (S1000) of purifying and discharging the separated liquid wastewater (10 '); And An eleventh step (S1100) of manufacturing the liquid fertilizer (80) using the separated gas; Livestock wastewater purification treatment method for converting the high concentration ammonia and organic substances contained in the livestock wastewater to liquid fertilizer and methane gas, respectively . The method of claim 1, The first step (S100) is a livestock wastewater purification method for converting the high concentration ammonia and organic substances contained in the livestock wastewater to liquid fertilizer and methane gas, respectively, characterized in that to remove foreign substances using the drum screen (200). The method of claim 1, The second step (S200) is a livestock wastewater for converting the high concentration ammonia and organic substances contained in the livestock wastewater into liquid fertilizer and methane gas, characterized in that the solids 20 are selected using a high-speed centrifuge (300) Purification Method. The method of claim 1, In the third step (S300), the livestock wastewater 10 is introduced into the coagulation stirring tank 400, and a polymer flocculant and polyaluminum chloride are added to the livestock wastewater to aggregate the particulate solid 20. Livestock wastewater purification method for converting the high concentration of ammonia and organic substances contained into liquid fertilizer and methane gas respectively. The method of claim 1, The fourth step (S400) is a livestock wastewater purification method for converting the high concentration ammonia and organic matter contained in the livestock wastewater into liquid fertilizer and methane gas, characterized in that the solid-liquid separation using a filter press (500). The method of claim 1, Livestock wastewater for converting the high concentration ammonia and organic matter contained in the livestock wastewater into liquid fertilizer and methane gas, respectively, characterized in that the water content of the solid 20 stored in the 5-1 step (S510) is 60% to 70% Purification Method. The method of claim 1, In the seventh step (S700), the high concentration of ammonia and organic substances contained in the livestock wastewater is adjusted to pH 10 to pH 12, wherein the livestock wastewater 10 from which the methane gas is decomposed is liquid fertilizer and methane gas. Livestock wastewater purification treatment The method of claim 1, In the eighth step (S800) to convert the high concentration ammonia and organic substances contained in the livestock wastewater to liquid fertilizer and methane gas, respectively, characterized in that the livestock wastewater 10 is heated to 50 ℃ to 70 ℃ using a boiler Livestock Wastewater Treatment Methods. The method of claim 1, The ninth step (S900) is a high concentration of ammonia and organic matter contained in the livestock wastewater, characterized in that the ammonia degassing tower 1000 using the air 40 generated in the blower 1050 as a liquid fertilizer and methane gas Livestock wastewater purification method to convert each. The method of claim 1, The tenth step (S1000) Step 10-1 (S1010) of removing nitrogen components remaining in the liquid wastewater (10 '); Step 10-2 (S1020) of biologically removing residual organic matter remaining in the wastewater (10 ') in which the nitrogen is removed using the immersion membrane; A step 10-3 (S1030) of injecting ozone into the biodegradable hardly decomposable substances remaining in the liquid wastewater (10 ') and oxidizing them by injecting ozone; And Livestock wastewater purification treatment for converting the high concentration ammonia and organic matter contained in the livestock wastewater into liquid fertilizer and methane gas, respectively; 10-4 step (S1040) for discharging the purified effluent (10 "). Way. The method of claim 10, The 10-1 step (S1010) is a high concentration of ammonia and organic substances contained in the livestock wastewater, characterized in that the biological denitrification tank 1200 consisting of aeration tank 1210 and anoxic tank 1220 as a liquid fertilizer and methane gas Livestock wastewater purification method to convert each. The method of claim 10, The 10-2 step (S1020) is a livestock wastewater purification method for converting the high concentration ammonia and organic substances contained in the livestock wastewater into liquid fertilizer and methane gas, respectively, characterized in that using the membrane-integrated wastewater advanced treatment method. The method of claim 10, The 10-3 step (S1030) is ozone consisting of an ozone contact tank 1410 for injecting ozone to react with the liquid waste water 10 'and an activated carbon tank 1420 for filtering the liquid waste water 10' with activated carbon. Livestock wastewater purification treatment method for converting a high concentration of ammonia and organic matter contained in the livestock wastewater to a liquid fertilizer and methane gas, respectively, characterized in that the reaction tank (1400). The method of claim 1, The eleventh step S1100 An eleventh step (S1110) in which the gas is reacted with an aqueous phosphoric acid solution (60) to absorb the ammonia (50) and the air (40) is discharged; When the aqueous solution 70 that absorbed the ammonia 50 reacts with the ammonia to reach 7% to 9% nitrogen and 2% to 3% phosphorus, the ammonia absorbed aqueous solution 70 is discharged to the storage tank. Step 11-2 (S1120); And A third step (S1130) of completing the liquid fertilizer 80 by adding potassium sulfate and a trace fertilizer component to the aqueous solution 70 absorbing the ammonia 50 discharged to the storage tank; Livestock wastewater purification method for converting high concentration ammonia and organic matter contained in livestock waste into liquid fertilizer and methane gas respectively. 15. The method of claim 14, In the 11-1 step (S1110) and the high concentration ammonia contained in the livestock waste water, the phosphoric acid aqueous solution 60 is sprayed using a spray to absorb the ammonia (50) contained in the gas in a wide range Livestock wastewater purification method for converting organic substances into liquid fertilizer and methane gas respectively. 15. The method of claim 14, The concentration of the aqueous phosphoric acid solution 60 used in the 11-1 step (S1110) is a high concentration of ammonia and organic substances contained in the livestock wastewater, characterized in that the phosphoric acid content of 8% to 10% liquid fertilizer and methane gas Livestock wastewater purification treatment 15. The method of claim 14, High concentration of ammonia and organic material contained in the livestock waste water, characterized in that the guaranteed component content of the nitrogen and phosphorus contained in the aqueous solution 70 absorbed ammonia 50 in step 11-2 (S1120) is 1% or more. Treatment method for converting wastewater into liquid fertilizer and methane gas, respectively. 15. The method of claim 14, The trace fertilizer component introduced in step 11-3 (S1130) is at least two or more of a high concentration of ammonia and organic matter contained in the livestock wastewater, characterized in that the earth, manganese, boron, iron, molybdenum, zinc, copper or lime Livestock wastewater purification method for converting substances into liquid fertilizer and methane gas respectively. The method of claim 18, The minimum content of guaranteed components for each of the trace fertilizers is 1.0% water soluble earth, 0.1% water soluble manganese, 0.04% water soluble boron, 0.1% water soluble iron, 0.0005% water soluble molybdenum, 0.05% water soluble zinc, 0.05% water soluble copper and water soluble. Livestock wastewater purification method for converting the high concentration of ammonia and organic matter contained in the livestock wastewater to 1.0% lime with liquid fertilizer and methane gas. 15. The method of claim 14, The liquid fertilizer 80 has a maximum content of sulfur oxides, arsenic, nitrous acid, biuretic nitrogen and sulfamic acid with respect to 1% of the total content of nitrogen, phosphoric acid and garlic component, respectively, 0.005% of sulfur oxide, 0.004% of arsenic, and 0.02% of nitrous acid. , 0.01% biuret nitrogen and 0.005% sulfamic acid, the livestock wastewater purification method for converting the high concentration ammonia and organic substances contained in the livestock wastewater to liquid fertilizer and methane gas, respectively. A drum screen 200 for filtering foreign substances contained in the livestock wastewater 10 to be carried in; A centrifuge (300) for separating and separating the solids (20) inside the livestock wastewater (10) from which foreign substances have been removed; An agglomeration agitator 400 for agglomerating the solid 20 remaining after being separated from the centrifuge 300; A filter press 500 for filtering the livestock wastewater 10 including the solids 20 aggregated in the coagulation stirring tank 400 in a pressurized state using a filtration membrane; Anaerobic digestion tank 700 for decomposing organic components and generating methane gas in the anaerobic state of the livestock wastewater (10) passing through the filter press 500; A pH adjusting tank 800 for adjusting the acidity of the livestock wastewater 10 passing through the anaerobic digestion tank 700; A heat exchanger 900 for heating the livestock wastewater 10 whose acidity is adjusted in the pH adjusting tank 800 to a predetermined temperature; The ammonia separating the livestock wastewater 10 heated to a predetermined temperature in the heat exchanger 900 with the air 40 to separate the liquid wastewater 10 'and the gas composed of the air 40 and the ammonia 50. Degassing tower 1000; A blower 1050 for supplying air 40 to the ammonia degassing tower 1000; A biological denitrification tank 1200 in which a biological treatment process for removing nitrogen components remaining in the liquid wastewater 10 'separated from the ammonia degassing tower 1000 is performed; An MBR tank 1300 for removing residual organic matter remaining in the liquid wastewater 10 'passing through the biological denitrification tank 1200; An ozone reactor (1400) that oxidizes and decomposes the hardly decomposable substances remaining in the liquid wastewater (10 ') passing through the MBR tank (1300) to meet the effluent (10 ") water quality standard; In order to prevent the ammonia (50) separated from the ammonia degassing tower (1000) from being discharged into the atmosphere, the ammonia (50) is reacted with an aqueous solution of phosphoric acid (60) to absorb an aqueous ammonia (50) again into an aqueous solution (70). An ammonia absorption tower 1500 for collecting; And Livestock wastewater, characterized in that consisting of; liquid fertilizer manufacturing apparatus (1700) for inputting and stirring the fertilizer components according to the fertilizer process standards to the aqueous solution 70 absorbing the ammonia (50) collected in the ammonia absorption tower (1500); Livestock wastewater purification apparatus for converting the high concentration of ammonia and organic substances contained in the liquid fertilizer and methane gas respectively. The method of claim 21, The ammonia degassing tower 1000 and the ammonia absorption tower 1500 inside the high concentration ammonia and organic material contained in the livestock waste water, characterized in that the filling medium 1100 for dispersing liquid and gas to increase the contact efficiency Livestock wastewater purification system for converting the liquid into liquid fertilizer and methane gas. 23. The method of claim 22, The filling medium (1100) is a livestock wastewater purification apparatus for converting a high concentration of ammonia and organic substances contained in the livestock wastewater to a liquid fertilizer and methane gas, characterized in that the material is stainless steel, plastic or ceramic. The method of claim 21, The biological denitrification tank 1200 Aeration tank 1210 for converting ammonia nitrogen to nitrate nitrogen; Livestock for converting the high concentration ammonia and organic substances contained in the livestock wastewater to liquid fertilizer and methane gas, respectively, characterized in that the aerobic tank 1220 for converting and removing the nitrate nitrogen converted in the aeration tank 1210 to remove the nitrogen gas Wastewater Purification System. The method of claim 21, The ozone reactor 1400 Ozone contact tank 1410 which injects ozone to react with liquid wastewater 10 'and Livestock wastewater purification apparatus for converting a high concentration of ammonia and organic substances contained in the livestock wastewater into liquid fertilizer and methane gas, characterized in that the activated carbon tank (1420) to filter the liquid wastewater (10 ') with activated carbon.

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