KR101622936B1 - Apparatus and method for cultivating micro-algae applied ozone oxidation - Google Patents

Abstract

The present invention relates to a method for anaerobic digestion of livestock wastewater by biologically treating an anaerobic digestion liquid through an MBR tank to remove organic matter and solid matter and using an MBR lake effluent containing residual nitrogen and phosphorus as a culture medium for microalgae, The present invention relates to a microalgae culture apparatus and a method for ozone oxidation using ozone oxidation reaction capable of improving microbial culture efficiency by removing chromaticity by applying ozone oxidation reaction to MBR effluent, The micro-algae cultivation apparatus to which the reaction is applied comprises an anaerobic digestion tank for anaerobic digestion of livestock wastewater, an MBR tank for biologically treating the anaerobic digestion liquid of the anaerobic digestion tank into sludge and effluent, and an ozone (O ₃ ) And reacts and oxidizes the organic substances contained in the MBR effluent with ozone or OH radical (OH ·) to form MB An ozone contact tank for removing chromaticity of the R tank effluent; a microalgae culture tank for culturing the microalgae using nitrogen and phosphorus contained in the effluent of the ozone contact tank as nourishment; and a microalgae culture tank for treating the microalgae culture tank with microalgae And a micro-algae separating membrane for separating the water from the micro-algae separating membrane.

Description

TECHNICAL FIELD The present invention relates to a micro-algae culturing apparatus and method for ozone oxidation,

More particularly, the present invention relates to an apparatus and a method for culturing a microalgae to which an ozone oxidation reaction is applied. More specifically, the present invention relates to an anaerobic digestion solution of livestock wastewater which is biologically treated through MBR to remove organic matter and solid components, The MBR effluent is used as a culture medium for microalgae to effectively remove nitrogen and phosphorus from the livestock wastewater and to remove the chromaticity by applying an ozone oxidation reaction to the MBR effluent, thereby improving ozone oxidation The present invention relates to a microalgae culture apparatus and method using the reaction.

Recently, interest in microalgae has been amplified in relation to the problem of CO2 reduction in order to mitigate the global warming phenomenon caused by carbon dioxide emission. The microalgae are used as energy sources by biochemically fixing carbon dioxide through photosynthesis. Biomass obtained as a result of microalgae growth is highly valuable for animal feeds, raw materials for bioenergy, and the like. In addition, eutrophication can be alleviated by using nitrogen and phosphorus contained in livestock manure without artificially supplying nitrogen and phosphorus necessary for culturing microalgae.

Accordingly, there have been attempts to cultivate microalgae using wastewater as a medium as in the development of a microalgae culture solution using livestock wastewater (Korea Patent Publication No. 2003-76133, No. 2003-95154). However, in this case, because the purpose is to cultivate an algae, there is a disadvantage that it is difficult for the wastewater to be treated stably.

In addition, technologies for treating wastewater using microalgae include a water purification device using a fluid contact material module and a bird module and a water purification method using the same (Korean Patent Laid-Open No. 2006-100869), a rural watershed A method for improving water quality (Korea Patent Publication No. 2005-0024728) was proposed. The shape of the reaction tank for treating wastewater using microalgae (Korea Patent Publication No. 2012-73432) and the microalgae culture and harvesting apparatus (Korean Patent Laid-Open No. 2011-118908) have been proposed.

However, the above technologies have limitations in directly treating high concentrations of nitrogen and phosphorus contained in animal manure anaerobic digestive juices, and can not artificially control the growth of algae. Thus, the treatment efficiency of nitrogen and phosphorus is low, It has a drawback that it is very difficult. In addition, there is a disadvantage in that it is difficult to stably produce and recover fine algae because algae are used or algae present in a certain system are used.

At the same time, the high concentration of chromaticity present in the livestock wastewater interferes with photosynthesis, thereby contributing to the deterioration of microbial culture efficiency.

Korean Patent Publication No. 2003-76133 Korean Patent Publication No. 2003-95154 Korean Patent Publication No. 2006-100869 Korean Patent Publication No. 2005-0024728 Korea Patent Publication No. 2012-73432 Korea Patent Publication No. 2011-118908

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a method and apparatus for anaerobic digestion of livestock wastewater by biologically treating an anaerobic digestion liquid through an MBR tank, The microbial culture apparatus using the ozone oxidation reaction capable of improving the microbial culture efficiency by removing the chromaticity by applying the ozone oxidation reaction to the MBR effluent effectively removes nitrogen and phosphorus from the livestock wastewater, And a method thereof.

In order to achieve the above object, there is provided an apparatus for culturing microalgae to which an ozone oxidation reaction is applied, comprising an anaerobic digestion tank for anaerobic digestion of livestock wastewater, an MBR tank for biologically treating the anaerobic digestion tank of the anaerobic digestion tank into sludge and effluent An ozone contact tank for bringing the effluent of the MBR tank into contact with ozone (O ₃ ) to react and oxidize the organic substances contained in the MBR tank effluent with ozone or OH radicals (OH ·) to remove the chromaticity of the MBR tank effluent, A microalgae culture tank for culturing the microalgae using nitrogen and phosphorus contained in the effluent of the contact tank as nutrients, and a microalgae separation membrane for separating the raw water of the microalgae culture tank by the microalgae and the treated water do.

The amount of ozone supplied to the ozone contact tank is 1 to 2.5 times the amount of dissolved organic carbon (DOC) contained in the MBR tank effluent.

The MBR reactor is operated under conditions that produce nitrite nitrogen (NO ₂ -N) through partial nitrification or nitrate nitrogen (NO ₃ -N) through complete nitrification, and the anaerobic digester of the anaerobic digester is biologically by treatment with ammonium nitrogen to nitrite nitrogen (NO ₂ -N) or nitrate sikimyeo converted to (NO ₃ -N), the nitrite nitrogen (NO ₂ -N) generating conditions, the MBR Joe dissolved oxygen 0.3 To 3 mg / L. In addition, the nitrite nitrogen (NO ₂ -N) may be produced under the conditions that the MBR bath is operated at a pH of 6.5 to 8, and the MBR bath is operated at a temperature of 25 to 35 ° C.

The microalgae culture tank further includes an acidifier device for supplying carbon dioxide (CO ₂ ) necessary for culturing the microalgae to one side of the microalgae culture tank and preventing membrane contamination of the microalgae separation membrane. A light source for supplying light energy necessary for culturing can be disposed. In addition, microalgae carbon dioxide necessary for the cultivation (CO ₂₎ is carbon dioxide (CO ₂₎ contained in the exhaust gas of the generator used, or using a biogas carbon dioxide (CO ₂₎ contained in the biogas produced in the anaerobic digestion tank Can be used.

The microalgae cultivation tank may be any one of a plate-type complete mixing type, a cylindrical full mixing type, a pipeline type plug flow type, and an oxidized spherical type plug flow type.

A method for culturing microalgae to which an ozone oxidation reaction is applied comprises the steps of anaerobic digestion of livestock wastewater to generate an anaerobic digestive juice, biologically treating the anaerobic digestive juice with MBR to separate sludge and effluent, Contacting the effluent of the MBR tank with ozone (O ₃ ) in the contact tank to react and oxidize the organic substances contained in the MBR effluent with ozone or OH radicals (OH) to remove the chromaticity of the MBR effluent, Culturing the microalgae in a microalgae culture tank using an effluent of a contacted MBR tank as a nutrient; and separating the raw water of the microalgae culture tank into microalgae and treated water through the microalgae separation membrane .

The amount of ozone supplied to the ozone contact tank is 1 to 2.5 times the amount of dissolved organic carbon (DOC) contained in the MBR tank effluent. The MBR reactor is operated under the conditions of producing nitrite nitrogen (NO ₂ -N) or nitrate nitrogen (NO ₃ -N), and the nitrite nitrogen (NO ₂ -N) To 3 mg / L, the MBR bath is operated at a pH of 6.5 to 8, and the MBR bath is operated at a temperature of 25 to 35 ° C.

The apparatus and method for culturing microalgae to which the ozone oxidation reaction according to the present invention is applied have the following effects.

In anaerobic digestion of livestock wastewater, it is possible to optimize microalgae cultivation environment by removing chromaticity by applying ozone oxidation reaction to the effluent of MBR tank. In addition, partial nitrification of ammonia nitrogen contained in the anaerobic digestion liquid of livestock wastewater produces nitrite nitrogen, or nitrite nitrogen is produced by nitrification and is used as a source of microalgae. Therefore, the growth of microalgae It is possible to prevent the inhibition and improve the efficiency of microalgae culture. Particularly, when nitrite nitrogen is produced by partial nitrification, time and energy required for complete nitrification can be reduced.

FIG. 1 is a schematic view of a microalgae culture apparatus to which an ozone oxidation reaction is applied according to an embodiment of the present invention. FIG.
FIGS. 2 to 5 are schematic views of a microalgae culture tank according to an embodiment of the present invention. FIG.
FIG. 6 is a graph showing chromaticity, light transmittance and microalgae production of MBR effluent according to the amount of ozone injected.
FIG. 7 is a graph showing the amounts of total nitrogen and total phosphorus removed according to the amount of ozone injected during the microalgae culture. FIG.

The present invention provides a technique for purifying livestock wastewater and using nitrogen components contained in livestock wastewater for culturing microalgae. The livestock wastewater is converted to anaerobic digestion through anaerobic digestion process, anaerobic digestion is biologically treated by membrane bio-reactor, and MBR effluent is used for microalgae culture.

Livestock wastewater contains high concentrations of ammonia nitrogen and high concentrations of organic matter in comparison with conventional wastewater, and a specialized treatment is required for application as a culture source of microalgae.

Even if the anaerobic digestion process is applied to the livestock wastewater and the biological treatment through the MBR tank is performed, a considerable amount of organic matter remains. Such residual organic matter darkens the chromaticity of the MBR effluent and adversely affects the microalgae culture environment. Accordingly, the present invention proposes a technique for optimizing the microalgal culture environment by lowering the chromaticity of the livestock wastewater by ozone oxidation reaction of the organic substances contained in the effluent of the MBR tank.

In addition, ammonia nitrogen in livestock wastewater is converted to nitrate nitrogen (NO ₃ -N) through nitrite nitrogen (NO ₂ -N) by the oxidation reaction of microorganisms by biological treatment in MBR tank, Since livestock wastewater contains a high concentration of ammonia nitrogen, it takes a lot of time and money to convert ammonia nitrogen into nitrate nitrogen. This is because ammonia nitrogen is partially nitrified by the high concentration of nitrite nitrogen generated by partial nitrification.

Based on these characteristics, it is also possible to achieve not only complete nitrification with nitrate nitrogen (NO ₃ -N) but also intentional partial nitrification with nitrite nitrogen (NO ₂ -N) in livestock wastewater containing high concentrations of ammonia nitrogen Do. Thus, in the present invention, the culture of micro-algae medium resulting nitrite nitrogen (NO ₂ -N) in the nitrification process in addition to the technique of using a nitrate nitrogen (NO ₃ -N) The final result of the nitrification process as a microalgae culture circle circle And suggest optimal nitrite nitrogen production conditions. In the present invention, the use of nitrite nitrogen as a culture source of microalgae can be selectively applied.

Hereinafter, an apparatus and method for culturing microalgae to which an ozone oxidation reaction is applied according to an embodiment of the present invention will be described in detail with reference to the drawings.

1, an apparatus for culturing microalgae to which an ozone oxidation reaction is applied according to an embodiment of the present invention includes an anaerobic digestion tank 110, an MBR tank 120, an ozone contact tank 130, a microalgae culture tank 150, And a fine algae separating membrane (160).

The anaerobic digestion tank 110 serves to anaerobically digest the livestock wastewater. Anaerobic digestion generated by the anaerobic digestion is biologically treated by the MBR tank 120 to be separated into sludge and effluent, and the effluent of the MBR tank 120 is supplied to the microalgae culture tank 150. Nitrogen and phosphorus of the solid components contained in the anaerobic digestion liquid are separated into sludge by the MBR tank 120. However, since the anaerobic digestion liquid contains high concentrations of nitrogen and phosphorus, some dissolved nitrogen and phosphorus are included in the effluent And the effluent of the MBR tank 120 containing a certain amount of nitrogen and phosphorus serves as nourishment of microalgae.

The MBR tank 120 biologically treats the anaerobic digestion liquid supplied from the anaerobic digestion tank 110 and removes solid matter using the separation membrane 121. Specifically, the MBR tank 120 converts biological nitrogenous substances into nitrite nitrogen or nitrate nitrogen by allowing the microorganisms to ingest a high concentration of ammonia nitrogen that acts as toxic to microalgae through biological treatment, Biologically through the action of microorganisms and removes total solids (SS) through the membrane. In addition, the MBR tank 120 partially nitrifies the high ammonia nitrogen contained in the anaerobic digestion solution with nitrite nitrogen (NO ₂ -N), and partially nitrified nitrite nitrogen (NO ₂ -N) It is also possible to use them as a circle, which will be described later in detail.

The ozone contact tank 130 removes the chromaticity of the MBR effluent water by contacting the MBR effluent water with ozone (O ₃ ) to oxidize the organic substances contained in the MBR effluent water. Ozone in the ozone contact tank 130 is supplied through a separate ozone generator 140, the supply of ozone in the ozone contact tank 130 may be directly reacted with the organic matter in the MBR tank effluent, this ozone together (O ₃ ) And water (H ₂ O) react with the organic material to remove the chromaticity. That is, the organic material oxidation in the ozone contact tank 130 proceeds by ozone (O ₃ ) or OH radical (OH ·).

Meanwhile, it is preferable that the amount (mg / L) of ozone supplied into the ozone contact tank is 1 to 2.5 times the amount of dissolved organic carbon (DOC) of the MBR effluent. MBR effluent and ozone contact improves the chromaticity and transparency of the MBR effluent but the optimal effect is ozone depletion of 1 to 2.5 times the dissolved organic carbon (mg / L) of the MBR effluent And the limitation of such a numerical range is supported by experimental results to be described later. In addition, ultraviolet rays may be applied to the ozone contact tank 130 to increase the generation of OH radicals.

The microalgae culture tank 150 cultivates microalgae using the effluent of the MBR tank and the microalgae separation membrane 160 separates the effluent of the microalgae culture tank 150 into microalgae and treated water do. At this time, as the chromaticity of the MBR effluent water is removed by the ozone contact tank 130, the light supply efficiency is increased and the microalga culture environment can be optimized.

As described above, the MBR tank 120 of the present invention is characterized in partially nitrifying the high concentration of ammonia nitrogen contained in the anaerobic digestion solution with nitrite nitrogen (NO ₂ -N), and the MBR tank 120 The nitrite nitrogen (NO ₂ -N) produced by the microorganisms is used for microalgae culture. For the production of nitrite nitrogen (NO ₂ -N), the MBR bath 120 is operated under the following conditions.

First, the dissolved oxygen (DO) of the MBR bath 120 should be maintained at 0.3 to 3 mg / L. If the dissolved oxygen of the MBR tank 120 is less than 0.3 mg / L, the partial nitrification reaction, i.e., the nitrite nitrogen generation reaction, is hardly achieved due to the small amount of oxygen. If the dissolved oxygen exceeds 3 mg / L, Is not increased. Next, the pH of the MBR bath 120 should be maintained at 6.5-8. If the pH of the MBR bath 120 is between 6.5 and 8, free ammonia is activated to prevent complete nitrification of ammonia nitrogen to nitrate nitrogen, thereby maximizing the concentration of nitrite nitrogen. On the other hand, if the pH is less than 6.5, the concentration of free ammonia is low and the complete nitrification reaction occurs. If the pH is more than 8, the concentration of free ammonia becomes too high and the efficiency of partial nitrification reaction is lowered because free ammonia is evaporated into the atmosphere. Finally, the temperature of the MBR bath 120 should be maintained at a temperature of 25 to 35 占 폚. When the temperature of the MBR bath 120 is in the range of 15 to 25 ° C, nitrate nitrogen is more actively produced than nitrite nitrogen. If the temperature of the MBR bath 120 is more than 35 ° C, microorganisms in the MBR bath 120 are damaged There is a concern.

In addition, the microalgae culture tank 150 can be implemented in various forms. For example, the microalgae culture tank 150 may include a flat mixed type (see FIG. 2), a cylindrical full mixed type (see FIG. 3) Flow type (see Fig. 4), or an oxidized spherical plug flow type (see Fig. 5). Meanwhile, the microalgae cultured in the microalgae culture tank 150, that is, the microalgae that are nourished by nitrogen and phosphorus, include Ankistrodesmus gracilis SAG278-2 (KCTC AG20745), Senethes Scenedesmus accuminatus (KCTC AG 10316), Senethesmus Kuah give the cow Scenedesmus quadicauda: include KCTC AG10032) can be used: KCTC AG 10308), it is used in Los peora platen system (Arthrospira platensis: KCTC AG20590) and Chlorella vulgaris (Chlorella vulgaris.

The micro-algae separation membrane 160 may be a clogged filtration system or a crossflow type filtration system in which the filtration direction of the micro-algae is perpendicular to the filtration direction of the micro- Can be used. In addition, the microalgae separation membrane 160 may be at least one selected from a microfiltration membrane having a membrane pore size of 0.1 to several micrometers and an ultrafiltration membrane having a membrane pore size of 0.002 to 0.05 micrometer, . The use of such a microalgae separation membrane 160 can independently separate the hydraulic retention time (HRT) and the solids retention time (SRT). Particularly, the concentration of microalgae in the microalgae culture tank (150) Control is possible. Meanwhile, the treated water separated by the microalgae separation membrane 160 may be partially transported and supplied to the MBR tank 120 to control the concentration of the anaerobic digestion liquid.

The microalgae culture tank 150 further includes a diffuser 151 for supplying carbon dioxide (CO ₂ ) necessary for microalgae culture and preventing membrane contamination of the microalgae separation membrane 160 And a light source 152 for supplying light energy necessary for culturing the microalgae may be disposed above the microalgae culture tank 150. When the microalgae culture tank 150 is constructed of a pipeline-type plug flow type (see FIG. 4), an air exchange tower 153 may be provided in place of the air diffuser 151, ). Further, carbon dioxide (CO ₂ ) required for culturing the microalgae can be recovered by using carbon dioxide (CO ₂ ) contained in the biogas produced in the anaerobic digestion tank 110 or by using carbon dioxide (CO ₂ ) contained in the exhaust gas of the generator using biogas ₂ ) can be used.

The apparatus and method for culturing microalgae to which the ozone oxidation reaction is applied according to an embodiment of the present invention have been described. Next, characteristics of the microalgae culturing of the microalgae culture apparatus to which the ozone oxidation reaction according to the present invention is applied will be described.

Table 1 below shows the characteristics of the MBR effluent according to the amount of ozone injected. The concentration of ozone generated in the ozone generator was 87 mg O ₃ / L, and the ozone concentration was injected at 5, 10, 15 and 20 minutes. The amount of ozone injected is increased by the increase of the ozonation duration and the amount of ozone injected is increased compared to the amount of dissolved organic carbon (DOC) of the MBR effluent. Here, the amount of dissolved organic carbon (DOC) means the total amount of organic carbon dissolved in the MBR effluent.

Characteristics of MBR effluent according to ozone injection amount Item
Ozonation duration (min)
0 5 10 15 20 O ₃ dose (mg-O ₃ mg-C ^-1 ) 0 0.5 1.1 1.6 2.1 pH 8.7 ± 0.1 8.6 ± 0.1 8.3 ± 0.1 8.1 ± 0.1 7.9 ± 0.1 COD (mg O ₂ L ^-1 ) 3,125 ± 21 2,630 ± 14 1,860 ± 57 1,655 ± 7 1,595 ± 21 TOC (mg L ^-1 ) 707 ± 4 723 ± 1 716 ± 1 684 ± 15 683 ± 4 UV 254 (cm ^-1 ) 34.3 ± 0.1 29.0 ± 0.1 16.0 + - 0.1 13.4 ± 0.1 11.1 ± 0.1 Color (mg Pt-Co L ^-1 ) 14,600 ± 28 8,400 ± 14 2,000 ± 28 1,240 ± 3 820 ± 3 TN (mg L ^-1 ) 1,873 ± 9 1,876 ± 14 16.0 + - 0.1 1,831 ± 11 1,842 ± 6 NH ₄ -N (mgL ^-1 ) 805 ± 3 835 ± 1 805 ± 3 800 ± 1 790 ± 1 TP (mg L ^-1 ) 112 ± 1 116 ± 3 114 ± 1 112 ± 1 116 ± 3

As shown in Table 1, when the ozone was injected for 5 minutes, the amount of ozone injected / dissolved organic carbon was found to be 0.5, 1.1 at 10 minutes, 1.6 and 2.1 at 15 minutes and 20 minutes, respectively. Also, it can be seen that when the ozone injection amount / dissolved organic carbon amount is increased to 0.5 or more, the chromaticity (Color, mg Pt-Co L ^-1 ) of the MBR effluent is remarkably reduced from about 14,600 to about 8,400, 2,000, 1,240, have.

FIG. 6 is a graph showing chromaticity, light transmittance and microalgae production of MBR effluent according to the amount of ozone injected. Referring to FIG. 6, it can be seen that the chromaticity of the MBR effluent is drastically reduced when the ozone injection amount / dissolved organic carbon amount is 0.5 or more, as shown in Table 1, and thus the light transmittance is improved. In addition, it can be seen that when the ozone injection amount / dissolved organic carbon amount is controlled to 1 to 2, microbial production is increased.

FIG. 7 is a graph showing the amounts of total nitrogen and total phosphorus removed according to the amount of ozone injected during the microalgae culture. FIG. It can be seen that nitrogen is removed only when the amount of ozone injected / dissolved organic carbon exceeds 1, and the removal of nitrogen means that nitrogen is used as a culture source in the microalgae culture. This means that when the ozone injection amount / dissolved organic carbon amount is 1 or less, microalgae culture is not smooth. On the other hand, when the amount of ozone injected / dissolved organic carbon exceeds 1, nitrogen is removed and phosphorus (P) is also used for culturing microalgae at a certain level.

Experimental results shown in Table 1, FIG. 6, and FIG. 7 confirm that the ozone injection amount should be supplied at 1 to 2.5 times the DOC of the MBR effluent for the chromaticity removal and optimal microalga culture environment have. When the ozone injection amount / dissolved organic carbon amount is less than 1, chromaticity reduction is insufficient and nitrogen is not consumed in the microalgae culture. If the amount of ozone injected / dissolved organic carbon exceeds 2.5, further color removal does not proceed.

110: anaerobic digestion tank 120: MBR tank
121: separator 130: ozone contact tank
140: ozone generator 150: microalgae culture tank
151: diffuser 152: light source
153: Air exchange column 160: Micro algae separation membrane

Claims (13)

Anaerobic digestion tank for anaerobic digestion of livestock wastewater;
An MBR tank for biologically treating the anaerobic digestion liquid of the anaerobic digestion tank and separating it into sludge and effluent;
An ozone contact tank for bringing the effluent of the MBR tank into contact with ozone (O ₃ ) to react and oxidize the organic substances contained in the MBR effluent water with ozone or OH radicals (OH ·) to remove the chromaticity of the MBR effluent;
A microalgae culture tank for culturing microalgae using nitrogen and phosphorus contained in the effluent of the ozone contact tank as nutrients; And
And a micro algae separation membrane for separating raw water of the microalgae culture tank by microalgae and treated water,
The MBR tank is operated under the condition of producing nitrite nitrogen (NO ₂ -N), biologically treating the anaerobic digester of the anaerobic digestion tank to convert ammonia nitrogen to nitrite nitrogen (NO ₂ -N)
The nitrite nitrogen (NO ₂ -N) production condition is such that the MBR tank is operated under the conditions of dissolved oxygen of 0.3 to 3 mg / L, the MBR tank is operated at a pH of 6.5 to 8, Wherein the ozone oxidation reaction is carried out at a temperature of about < RTI ID = 0.0 > 100 C < / RTI >
The microalgae culture apparatus according to claim 1, wherein the ozone injection amount supplied to the ozone contact tank is 1 to 2.5 times the amount of dissolved organic carbon (DOC) contained in the MBR effluent.
delete delete delete delete [3] The microalgae culture apparatus according to claim 1, further comprising a diffuser which supplies carbon dioxide (CO ₂ ) necessary for culturing microalgae to one side of the microalgae culture tank and prevents membrane contamination of the microalgae separation membrane, Wherein a light source for supplying light energy necessary for culturing the microalgae is disposed on the upper part of the incubation tank.
The method of claim 7, wherein the microalgae carbon dioxide necessary for the cultivation (CO ₂₎ is carbon dioxide contained in the exhaust gas of the generator used, or using a biogas carbon dioxide (CO ₂₎ contained in the biogas produced in the anaerobic digestion tank (CO ₂ ) is used as the micro-algae culture apparatus.
3. The microalgae culture apparatus according to claim 1, wherein the microalgae culture tank is any one of a plate-type complete mixing type, a cylindrical full mixing type, a pipeline type plug flow type, and an oxidized spherical type plug flow type. A microalgae culture system to which oxidation reaction is applied.
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