JP6507292B1 - Sewage treatment apparatus and manufacturing method thereof - Google Patents

Abstract

The present invention provides a sewage treatment apparatus and manufacturing method thereof that can simplify equipment and do not require much time for maintenance and the like, and can effectively remove colored substances, odorous substances, and the like contained in sewage such as livestock manure.
A sewage treatment apparatus 10 is provided with a filter 3 capable of adsorbing coloring substances, odorous substances, and the like contained in sewage OS such as livestock manure. The filter is the porous filter 3 in which the powder graphite 31 is dispersed and disposed in the porous ceramic layer 32.
[Selected figure] Figure 1

Description

  The present invention relates to a waste water treatment apparatus and a method for producing the same, and more specifically, powder graphite capable of effectively adsorbing a coloring substance, an odorant or the like contained in waste water such as livestock manure is dispersed and disposed in a porous ceramic layer. The present invention relates to a sewage treatment apparatus provided with a porous filter and a method of manufacturing the same.

  As a basic process, the method of removing solid matter by primary treatment (solid-liquid separation) and removing the remaining organic matter by secondary treatment (microorganism treatment) through the action of microorganisms is the basic process for the treatment of sewage such as livestock manure and urine. , Are commonly used. However, although BOD (biochemical oxygen demand) and suspended solids can be removed in the above basic process, COD (chemical oxygen demand), colored substances, odorous substances and the like can not be removed. Therefore, advanced treatment is carried out on the waste water treated in the basic process to remove intractable substances such as nitrogen, phosphorus, coloring, odor and the like exceeding the drainage standard by chemical or physical method or the like.

  For example, in order to perform the above-mentioned advanced treatment on the waste water of solid waste which has been separated from solid waste in Patent Document 1, a solid-liquid separation tank 101, an electrolytic floating tank 102, a non-diaphragm electrolytic tank 103, as shown in FIG. There is disclosed a purification processing apparatus 100 of livestock waste urine provided with an electrodialysis tank 104, a natural zeolite column 105, and an activated carbon column 106. In the purification treatment apparatus 100, first, the polymer flocculant 107 is charged into the solid-liquid separation tank 101, and solid-liquid separation of the stored livestock excrement urine 108 is performed. Next, the separated liquid portion (sewage water 109) is transferred to the electrolytic floating tank 102, and sodium chloride as a supporting electrolyte is added. In addition, direct current is applied to the waste water 109 to which salt is added to conduct electrolysis. Next, the treated water 109a decolorized and deodorized in the electrolytic floating tank 102 flows into the non-diaphragm electrolytic tank 103, and sodium chloride is added. A direct current is applied to the treated water 109a to which sodium chloride has been added to carry out non-diaphragm electrolysis. In addition, the treated water 109 a is electrically dialyzed in the electrodialysis tank 104. Further, the treated water 109a is allowed to flow through the natural zeolite column 105 to remove ammonia. Finally, the treated water 109a is circulated in the activated carbon column 106 to perform deodorization and decolorization, and the purified water 110 is discharged.

Japanese Patent Application Laid-Open No. 7-256297

However, since the purification treatment apparatus 100 includes the electrolytic floating tank 102, the non-diaphragm electrolytic tank 103, and the electric dialysis tank 104, there is a problem that the equipment is enlarged, processing cost is increased, and maintenance is complicated. there were.
In addition, natural zeolite can adsorb ammonia-based cations, but it has little adsorption effect on complex mixed odorants derived from low fatty acids, so it is inevitable to use activated carbon to adsorb all odorants in combination. However, natural zeolite and activated carbon lose their functions when the pore volume for adsorbing odorous substances and the like is saturated, so it has been necessary to take them out from the cylinder (column) to be stored and exchange them. Therefore, there is a problem that it takes time and labor involved with the replacement, etc., and the processing must be suspended during the replacement and the like.

  The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to simplify equipment and to save time and labor for maintenance, etc., and to contain colored substances and odorous substances contained in waste water such as livestock manure And the like, and a sewage treatment apparatus capable of effectively removing etc.

In order to solve the above-mentioned subject, the waste water treatment apparatus of the present invention and its manufacturing method have the following composition.
(1) A waste water treatment apparatus comprising a filter capable of adsorbing coloring substances and odorous substances contained in waste water such as livestock manure,
The filter is a porous filter in which powder graphite is dispersed and disposed in a porous ceramic layer.

In the present invention, since the filter is a porous filter in which powder graphite is dispersed and arranged in a porous ceramic layer, when waste water passes through the porous filter, coloring matter, odor material, etc. It can be adsorbed by porous pores, eliminating the need for extensive equipment such as electrolysis. In the porous filter, since powder graphite is dispersed in the porous ceramic layer, when the coloring substance or odorous substance is adsorbed to the pores of the powder graphite and becomes saturated, the porous filter is used. It is possible to quickly adsorb coloring substances, odorous substances and the like contained in untreated sewage only by exchanging etc.
Therefore, according to the present invention, there is provided a waste water treatment apparatus which can simplify facilities and does not require much labor such as maintenance, and can effectively remove coloring substances and odorous substances contained in waste water such as livestock manure. Can.

(2) In the waste water treatment apparatus described in (1),
The porous filter is characterized in that it is a cylindrical body standing up with the opening upward.

  In the present invention, since the porous filter is a cylindrical body standing upright with the opening upward, it is included in the sewage only by injecting the sewage into the cylindrical body of the porous filter and storing it for a certain period of time Treated water from which colored substances, odorous substances and the like have been removed is discharged from the outer surface of the bottom and side wall of the cylindrical body. The treated water discharged from the outer surface of the bottom of the cylindrical body and the side wall can be decolorized or deodorized to be colorless and odorless and released as it is to a river or the like. Therefore, the present waste water treatment apparatus can be formed with a simple structure in which the cylindrical porous filter is disposed adjacent to the required number corresponding to the amount of waste water such as livestock manure. As a result, it is possible to further simplify the installation, and it takes less time for maintenance, etc., and it is possible to more effectively remove coloring substances, odorous substances and the like contained in waste water such as livestock manure.

(3) In the sewage treatment apparatus described in (1) or (2),
The said powder graphite is a graphite particle exfoliated by discharge from the graphite electrode which carries out discharge processing of aluminum, Comprising: It is characterized by being sorted out within the mesh range of 16th or less to 60th or more. Here, “16th” corresponds to JIS nominal opening 1.00 mm, and “60th” corresponds to JIS nominal opening 250 μm (JIS Z 8801-1: 2006).

  In the present invention, the powder graphite is a graphite particle exfoliated by a discharge from a graphite electrode that discharges aluminum, and is classified into a mesh range of 16th or less to 60th or more, so a predetermined particle size range By being able to disperse | distribute the powder graphite contained in substantially uniformly in a ceramic layer, the pore and the powder graphite which are formed in a ceramic layer can be connected, and the water permeability of a porous filter can be raised. In addition, the graphite particles exfoliated from the graphite electrode that discharges aluminum by discharge are porous bodies having many fine pores. Therefore, the coloring substance, the odorous substance and the like contained in the waste water can be efficiently adsorbed, and the processing time required for the purification of the waste water can be shortened. In addition, aluminum acting as a cation is attached in the pores of the graphite particles exfoliated by the discharge from the graphite electrode that discharge-processes the aluminum. The cations of this aluminum can adsorb anions such as colored substances and odorous substances, and it is possible to more effectively remove colored substances and odorous substances contained in waste water such as livestock manure. In addition, reusing graphite electrodes for electrical discharge machining can contribute to effective use of resources and reduction of equipment costs.

(4) The method for producing the sewage treatment apparatus according to any one of (1) to (3), wherein
A kneading step of kneading an aqueous solution obtained by adding the powder graphite, a ceramic raw material such as clay or ore powder, a coagulant and a binder;
The aqueous solution mixed in the mixing step is poured into a draining mold formed of gypsum, and the aqueous solution in the draining mold absorbs the moisture on the outer peripheral side from the aqueous solution in the draining mold to form a porous filter equivalent portion When,
A drying step of drying the porous filter corresponding portion formed in the draining step;
The porous filter is characterized in that it is subjected to a firing step of sintering the ceramic raw material by heating the portion corresponding to the porous filter dried in the drying step under a slight oxygen atmosphere, thereby forming the porous filter.

In the present invention, the kneading step is carried out in a kneading step of kneading an aqueous solution obtained by adding powder graphite, a ceramic raw material such as clay or ore powder, a coagulant and a binder, and the kneading step. The aqueous solution is poured into a draining mold formed of gypsum, and water from the aqueous solution in the draining mold is absorbed by the gypsum on the outer peripheral side to form a porous filter equivalent portion, and a porous formed in the draining step The porous filter is formed through a drying step of drying the filter equivalent portion and a firing step of sintering the ceramic raw material by heating the porous filter equivalent portion dried in the drying step under a slight oxygen atmosphere, When an aqueous solution containing powder graphite and a ceramic raw material is mixed, the powder graphite is dispersed and disposed in the ceramic raw material without being unevenly distributed, and is selected to a predetermined particle size range. A large amount of bubbles are released from the pores of the powder graphite adheres to the periphery of the graphite powder which are arranged distributed. Therefore, the porous filter equivalent portion formed in the drainage step has a predetermined thickness and is clay-like by the water on the outer peripheral side being released through the pores of the powder graphite and the large number of air bubbles attached to the periphery of the powder graphite. Is solidified. Further, in the firing step, since the portion corresponding to the dried porous filter is heated in a slight amount of oxygen atmosphere to sinter the ceramic raw material, the large amount of air bubbles attached to the periphery of the powder graphite The pores that connect are formed. In addition, although the powder graphite is heated to the combustion temperature or higher but heated in a trace oxygen atmosphere, it is dispersed and disposed in the porous ceramic layer in a state of remaining substantially without being burned. . As a result, it is possible to easily form a porous filter in which powder graphite is dispersed and disposed in the porous ceramic layer.
Therefore, according to the present invention, it is possible to simplify the equipment and not to spend time for maintenance, etc., and to manufacture a wastewater treatment device capable of effectively removing coloring substances and odorous substances contained in sewage such as livestock manure. We can provide a way.

(5) In the method of manufacturing the waste water treatment apparatus described in (4),
When the pores of the powder graphite are saturated by adsorbing a coloring substance, an odor substance, etc., the porous filter is heated at a temperature lower than the combustion temperature of the powder graphite under an oxygenated atmosphere. It is characterized by

  In the present invention, when the pores of the powder graphite are saturated by adsorbing a coloring substance, an odor substance or the like, the porous filter is heated at a temperature lower than the burning temperature of the powder graphite in an oxygen atmosphere. Since the heating step is provided, it is possible to easily regenerate the porous filter by burning the coloring substance, the odorous substance, etc. in which the pores of the powder graphite are adsorbed while leaving the powder graphite in the porous filter. Therefore, while reducing the maintenance cost further, it is possible to effectively remove coloring substances, odor substances and the like contained in waste water such as livestock manure.

  According to the present invention, there is provided a waste water treatment apparatus and a method for producing the same, which can simplify facilities and save time and labor for maintenance and can effectively remove colored substances and odorous substances contained in waste water such as livestock manure. can do.

It is a schematic block diagram of the waste water treatment apparatus which concerns on this embodiment. It is a typical detailed sectional view of the A section shown in FIG. It is a microscope picture figure of the side wall outer surface of the porous filter in the waste water treatment apparatus shown in FIG. It is a microscope picture figure of the powder graphite distributed by the porous filter in the waste water treatment apparatus shown in FIG. It is a flowchart figure which manufactures the porous filter in the sewage treatment apparatus shown in FIG. It is a schematic diagram of the drainage process shown in FIG. It is a schematic diagram of the baking process shown in FIG. It is a graph showing the test result when the waste water of livestock manure is processed by the porous filter of the waste water treatment apparatus shown in FIG. It is a schematic block diagram of the purification processing apparatus of animal husbandry urine described in patent document 1.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.
First, the configuration and operation method of the waste water treatment apparatus of the present embodiment will be described in detail. Next, the manufacturing method of the waste water treatment apparatus of this embodiment is demonstrated in detail. Finally, the result of the sewage treatment test by the porous filter of the sewage treatment apparatus in this embodiment is explained.

<Configuration and operation method of the present sewage treatment apparatus>
First, the configuration and operation method of the waste water treatment apparatus according to the present embodiment will be described using FIGS. 1 to 4. In FIG. 1, the schematic block diagram of the waste water treatment apparatus which concerns on this embodiment is shown. FIG. 2 shows a schematic detailed cross-sectional view of a portion A shown in FIG. FIG. 3 shows a photomicrograph of the outer surface of the side wall of the porous filter in the waste water treatment apparatus shown in FIG. FIG. 4 shows a photomicrograph of powdered graphite dispersed and disposed in the porous filter in the waste water treatment apparatus shown in FIG.

  As shown in FIG. 1, the waste water treatment apparatus 10 according to the present embodiment is a waste water treatment apparatus provided with a filter 3 capable of adsorbing coloring substances, odorous substances and the like contained in waste water OS such as livestock manure. That is, the present waste water treatment apparatus 10 has a solid-liquid separation tank 1 that contains livestock manure TH and separates the solid matter KT and the waste water OS, and a plurality of filters (porous filters) 3 The waste water treatment tank 2 which adsorbs and removes the coloring substance, the odorous substance, and the like contained in the waste water OS separated in the separation tank 1 through the porous filter 3 is provided. The porous filter 3 is a cylindrical body standing upright with the opening 3T upward. Therefore, the treated water SS from which colored substances, odorous substances and the like contained in the sewage OS have been removed simply by injecting the sewage OS into the cylinder and storing it for a certain period of time is the bottom and the side wall of the cylinder. It is discharged from the outer surface. The cylindrical body can be formed into a cylindrical shape, a rectangular cylindrical shape, an elliptical cylindrical shape, or the like.

  Further, the sewage treatment tank 2 is provided with a reticulated middle floor 22 on which the porous filter 3 is placed, and a discharge pipe 23 for discharging the treated water SS filtered by the porous filter 3 is connected below the middle floor 22. It is done. A discharge valve 231 is attached to the discharge pipe 23. The solid-liquid separation tank 1 and the sewage treatment tank 2 are connected by a sewage supply pipe 21. A feed pump 211 and a feed valve 212 to the porous filter 3 are attached to the dirty water feed pipe 21. The supply valve 212 is disposed to face the opening 3T of each porous filter 3.

  In the present waste water treatment apparatus 10, when a polymer flocculant etc. is introduced into the solid-liquid separation tank 1 containing livestock manure TH, the solid matter KT and the waste water OS are separated, and the solid matter KT floats up. The solid KT that has surfaced is collected separately. Further, the sewage OS separated in the solid-liquid separation tank 1 is supplied into the porous filters 3 of the sewage treatment tank 2 via the sewage supply pipe 21. The treated water SS filtered by the porous filter 3 is discharged from the discharge pipe 23 to the outside.

  Further, as shown in FIGS. 2 to 4, the filter 3 for filtering the dirty water OS is the porous filter 3 in which the powder graphite 31 is dispersed and disposed in the porous ceramic layer 32. That is, the powder graphite 31 is dispersed and disposed in the ceramic layer 32 in a state of being in communication with the large number of pores 321 formed in the ceramic layer 32. Therefore, the sewage OS filtered by the porous filter 3 contacts the powder graphite 31 through the pores 321 of the ceramic layer 32.

  Here, it is preferable that the powdery graphite 31 is a graphite particle exfoliated by a discharge from a graphite electrode that discharges aluminum and is sorted in a mesh range of 16th or less to 60th or more. Here, “16th” corresponds to JIS nominal opening 1.00 mm, and “60th” corresponds to JIS nominal opening 250 μm (JIS Z 8801-1: 2006).

  Unlike the metal material electrode such as a copper electrode, the graphite electrode is a porous body which is composed of particles and has a large number of fine pores unlike a metal material electrode such as a copper electrode. In addition, when the aluminum is subjected to electrical discharge machining using a graphite electrode, it is presumed that the intergranular fracture phenomenon occurs due to thermal shock or the like due to arc discharge and the particulate graphite (graphite particles) is exfoliated. In general, the graphite electrode is prepared by kneading the primary crushed coke (aggregate) with a pitch (binder) and further secondary crushing, and then putting it in a rubber mold using a CIP device using water pressure It is manufactured by isotropic pressure, baking the compact at about 1000 ° C. in a non-oxidative atmosphere, and graphitizing at a high temperature of 2400 to 3000 ° C.

  Therefore, a large number of fine pores 311 are maintained as it is in the powder graphite 31, and the fine pores 311 can adsorb a coloring substance, an odorant and the like contained in the waste water OS. In addition, aluminum acting as a cation is attached in the pores 311 to the graphite particles exfoliated by the discharge from the graphite electrode that discharge-processes the aluminum. Aluminum cations can adsorb anions such as colored substances and odorous substances.

  In addition, forming the large number of pores 321 of the appropriate size for connecting the powder graphite 31 to each other in the ceramic layer 32 by sorting the powder graphite 31 within the mesh range of 16th or less to 60th or more it can. The reason will be described in detail in the method of manufacturing the waste water treatment apparatus 10.

<Manufacturing method of this sewage treatment device>
Next, the manufacturing method of the waste water treatment apparatus of this embodiment is demonstrated in detail using FIGS. 5-7. FIG. 5 shows a flow chart for producing the porous filter in the waste water treatment apparatus shown in FIG. FIG. 6 shows a schematic view of the water removing step shown in FIG. FIG. 7 shows a schematic view of the firing step shown in FIG.

  As shown in FIG. 5, the method of manufacturing the waste water treatment apparatus 10 according to this embodiment includes a kneading step S1, a draining step S2, a drying step S3 and a baking step S4 as new steps of the porous filter 3. There is. First, in the kneading step S1, an aqueous solution (slurry) obtained by adding powder graphite 31, ceramic raw materials such as clay and ore powder, a coagulant, and a binder is kneaded.

  The proportion of the powdery graphite 31 and the ceramic material is preferably 40 to 50% by weight of the powdery graphite 31 and 60 to 50% by weight of the ceramic material, and water is added to the powdery graphite 31 and the ceramic material. About 40% is preferable with respect to the weight.

  Here, since the powder graphite 31 is sorted within the mesh range of 16th or less to 60th or more, when the aqueous solution (slurry) KS is mixed, the powder graphite 31 is not unevenly distributed in the ceramic material. They are distributed substantially evenly. In addition, a large amount of air bubbles are released from the pores 311 of the powder graphite 31 sorted into a predetermined particle size range, and the air bubbles are dispersed and attached around the powder graphite 31 disposed.

  Next, in the draining step S2, the aqueous solution (slurry) KS kneaded in the kneading step S1 is poured into the draining mold 4 formed of gypsum, and the water content of the outer peripheral portion 51 from the aqueous solution KS in the draining mold 4 The gypsum is absorbed to form a porous filter equivalent portion 5 (see FIG. 6). The porous filter equivalent portion 5 is solidified in a clay shape having a predetermined thickness by the water in the outer peripheral portion 51 being released through the pores 311 of the powder graphite 31 and a large number of air bubbles attached to the periphery of the powder graphite 31. Ru.

  At this time, the inner surface of the porous filter equivalent portion 5 is formed to be a minute uneven surface. After the porous filter equivalent portion 5 is solidified into a clay shape, the aqueous solution (slurry) KS remaining on the inner circumferential portion 52 is discharged. Since the porous filter equivalent portion 5 is slightly shrunk by discharging the aqueous solution (slurry) KS, it can be easily removed from the drainage mold 4.

  Next, in the drying step S3, the porous filter equivalent portion 5 formed in the water removing step S2 is dried. Then, in the firing step S4, the porous filter equivalent portion 5 dried in the drying step S3 is heated in a trace oxygen atmosphere to sinter the ceramic raw material. Specifically, as shown in FIG. 7, the powder graphite 31 is housed in a container 61 disposed in the electric furnace 6, and the dried porous filter equivalent portion 5 is buried in the powder graphite 31 housed. Thus, a trace oxygen atmosphere is formed to heat the heater 62. The heating temperature of the heater 62 is about 1000 to 1200 ° C., and the heating time is about 10 hours.

  Further, in the firing step S4, the dried porous filter equivalent portion 5 is heated in a slight amount of oxygen atmosphere to sinter the ceramic raw material, so a large number of air bubbles attached around the powder graphite 31 cause the inside of the ceramic layer 32 to The pores 321 connecting the powder graphite 31 to each other are formed. In addition, although the powder graphite 31 is heated to its combustion temperature (about 500 to 600 ° C.) or higher, but is heated in a trace oxygen atmosphere, it is porous ceramic in a state of remaining substantially without being burned. Distributed in the layer 32. As a result, the porous filter 3 in which the powder graphite 31 is dispersed and disposed in the porous ceramic layer 32 can be easily manufactured.

  Moreover, as shown in FIG. 5, the manufacturing method of the waste water treatment apparatus 10 of this embodiment is equipped with the reheating process S5 as a reproduction process of the porous filter 3. As shown in FIG. That is, when the pores 311 of the powder graphite 31 in the porous filter 3 become saturated by adsorbing a coloring substance, an odor substance, etc., the porous filter 3 is less than the burning temperature of the powder graphite 31 in an oxygenated atmosphere. It has a reheating step of heating at temperature. Therefore, it is possible to easily regenerate the porous filter 3 by burning the coloring substance, the odorous substance, and the like adsorbed by the pores 311 of the powder graphite 31 while leaving the powder graphite 31 in the porous filter 3.

<Result of sewage treatment test>
Next, the result of the sewage treatment test by the porous filter 3 of the sewage treatment apparatus 10 which concerns on this embodiment is demonstrated using FIG. FIG. 8 is a chart showing the test results when the sewage of livestock manure is treated by the porous filter of the sewage treatment apparatus shown in FIG. Here, the feces and urine undiluted solution (soiled water OS) is the contaminated water OS separated in the solid-liquid separation tank 1 shown in FIG.

  FIG. 8 shows evaluation points of the wastewater treatment test: 1 for biochemical oxygen demand (BOD), 2 for chemical oxygen demand (COD), 3 for suspended solids, 4 for nitrogen content, and 5 for chromaticity It is described that each reference value, the state of the undiluted manure solution (sewage OS), the result after the treatment according to the example, and the result after the treatment according to the comparative example can be compared with each other.

  The porous filter 3 of the example is a porous filter in which the powder graphite 31 is dispersed and disposed in the porous ceramic layer 32 as described in the configuration and the manufacturing method of the waste water treatment apparatus 10 of the present embodiment. It is a cylindrical body standing upright with the opening 3T facing upward. Further, the powder graphite 31 is a graphite particle exfoliated by a discharge from a graphite electrode that discharge-processes aluminum, and is sorted within the mesh range of not more than 16 and not less than 60. Moreover, the porous filter 3 is manufactured by the new-work process (Kneading process S1, drainage process S2, drying process S3, baking process S4) shown in FIG.

  On the other hand, the comparative example is a cylindrical body having the same shape as the porous filter 3 and is formed only of porous ceramics. Therefore, the difference between the example and the comparative example is only the presence or absence of the powdery graphite 31.

  According to the test results shown in FIG. 8, 1 biochemical oxygen demand (BOD) was 34 mg / L in the example and 70 mg / L in the comparative example with respect to 210 mg / L of the feces and urine stock solution. Therefore, although it was below the standard value (160 mg / L) in the example and the comparative example, the example can be reduced to about half of the comparative example.

  Moreover, 2 chemical oxygen demand (COD) was 100 mg / L in the example and 440 mg / L in the comparative example with respect to 620 mg / L of the feces and urine stock solution. Therefore, although the example was below the standard value (160 mg / L), the comparative example significantly exceeded the standard value (160 mg / L).

  Further, the amount of suspended solids 3 was 4 mg / L in the example and 13 mg / L in the comparative example with respect to 12 mg / L of the feces and urine stock solution. Therefore, although it was below the standard value (200 mg / L) in the example and the comparative example, the example can be reduced to about 1/3 of the comparative example. In addition, although 13 mg / L of a comparative example is slightly larger than 12 mg / L of manure solutions, it is considered that a measurement error is included.

  The 4-nitrogen content was 110 mg / L in the example and 210 mg / L in the comparative example with respect to 800 mg / L of the feces and urine stock solution. Therefore, although the example was below the standard value (120 mg / L), the comparative example significantly exceeded the standard value (120 mg / L). The example can be reduced to about 1/2 of the comparative example.

  As for the 5 color, for the feces and urine stock solution: dark brown, the example was colorless and transparent, and the comparative example was light yellow. Therefore, although the example satisfies the reference value (colorless transparency), the comparative example can not satisfy the reference value (colorless transparency) although a certain decoloring effect is observed.

  Here, the biochemical oxygen demand (BOD) is the amount of oxygen consumed when organic matter in the water is decomposed by the action of aerobic microorganisms, and the chemical oxygen demand (COD) is It is the amount of oxygen consumed when oxidizing the organic matter with an oxidizing agent such as potassium permanganate, and both are used as an indicator for measuring the organic matter contamination. Chemical oxygen demand (COD) has the advantage of being able to measure persistent organic matter that can not be measured by biochemical oxygen demand (BOD), because it uses an oxidizing agent. In addition, the nitrogen content increases when it contains a large amount of nitrogen compounds such as ammonia. Further, odorous substances in livestock manure contain a large amount of anaerobic organic compounds such as sulfur compounds such as hydrogen sulfide and methyl mercaptan, nitrogen compounds such as ammonia, and carbon compounds such as volatile fatty acids.

  Therefore, the results after the treatment according to the example are comparative examples in any of the items of 1 biochemical oxygen demand (BOD), 2 chemical oxygen demand (COD), 3 suspended solids, and 4 nitrogen content. It is judged that odorous substances in livestock manure can be adsorbed more effectively because the results after the treatment by the above are greatly exceeded.

  Moreover, although the humic acid etc. which contain many carboxyl groups are considered as a coloring substance in livestock manure, if it is an acid, it will generally have anion. Odorous substances in livestock manure also have acids such as volatile fatty acids and have anions. Therefore, it is considered that the powdery graphite 31 having a cation and the aluminum attached thereto effectively act on the adsorption of coloring substances, odorous substances and the like.

  Therefore, since the example is the porous filter 3 in which the powder graphite 31 is dispersed and disposed in the porous ceramic layer 32, when the dirty water OS passes through the porous filter 3, the coloring matter, the odorous substance, etc. It is considered that the fine pores 311 of the graphite 31 could be effectively adsorbed.

<Function effect>
As described above in detail, according to the waste water treatment apparatus 10 according to the present embodiment, the filter 3 is the porous filter 3 in which the powder graphite 31 is dispersed and disposed in the porous ceramic layer 32, the waste water When OS passes through the porous filter 3, coloring substances, odorous substances and the like can be adsorbed by the fine pores 311 of the powder graphite 31, and a large-scale equipment such as electrolysis becomes unnecessary. Further, in the porous filter 3, since the powder graphite 31 is dispersed and disposed in the porous ceramic layer 32, when a coloring substance, an odor substance, or the like is adsorbed to the pores 311 of the powder graphite 31 and becomes saturated. By replacing the porous filter 3 or the like, it is possible to rapidly adsorb coloring substances, odorous substances and the like contained in the untreated wastewater OS.
Therefore, according to the present embodiment, the sewage treatment apparatus 10 is capable of simplifying the equipment and taking time for maintenance and the like, and capable of effectively removing coloring substances, odorous substances, and the like contained in the sewage OS such as livestock manure. Can be provided.

  Further, according to the present embodiment, since the porous filter 3 is a cylindrical body standing up with the opening 3T upward, the sewage OS is injected into the cylindrical body of the porous filter 3 and stored for a predetermined time. The treated water SS from which coloring substances, odorous substances and the like contained in the dirty water OS have been removed is discharged from the outer surface of the bottom and the side wall of the cylindrical body only by storing. The treated water SS discharged from the outer surface of the bottom of the cylindrical body and the side wall may be decolorized or deodorized into a colorless or odorless state, and may be discharged to a river or the like as it is. Therefore, the waste water treatment apparatus 10 can form the cylindrical porous filter 3 with a simple structure in which the required number of the porous filters 3 are disposed adjacent to each other in accordance with the amount of treated waste water OS such as livestock manure. . As a result, the facilities can be further simplified, and maintenance and the like are not required, and it is possible to more effectively remove colored substances, odorous substances, and the like contained in the sewage OS such as livestock manure.

  Further, according to the present embodiment, since the powder graphite 31 is a graphite particle exfoliated by a discharge from a graphite electrode that discharges aluminum, it is sorted in the mesh range of 16th or less to 60th or more, Since the powder graphite 31 contained in the predetermined particle diameter range can be dispersed approximately equally in the ceramic layer 32, the pores 321 formed in the ceramic layer 32 can be communicated with the powder graphite 31, and the porous filter 3 can be made. Water permeability can be increased. Moreover, the powder graphite 31 which consists of a graphite particle exfoliated by discharge from the graphite electrode which carries out discharge processing of aluminum is a porous body which has many fine pores 311. Therefore, the coloring substance, the odorous substance, and the like contained in the waste water OS can be efficiently adsorbed, and the processing time required to purify the waste water OS can be shortened. In addition, aluminum acting as a cation is attached in the pores of the graphite particles exfoliated by the discharge from the graphite electrode that discharge-processes the aluminum. The cations of this aluminum can adsorb anions such as colored substances and odorous substances, and the colored substances and odorous substances contained in the waste water OS such as livestock manure can be more effectively removed. In addition, reusing graphite electrodes for electrical discharge machining can contribute to effective use of resources and reduction of equipment costs.

According to another embodiment of the method for producing the waste water treatment apparatus 10, an aqueous solution KS to which powder graphite 31, ceramic raw materials such as clay and ore powder, coagulant, and binder are added is mixed and kneaded The aqueous solution KS kneaded in the kneading step S1 and the kneading step S1 is poured into the draining mold 4 formed of gypsum, and the water on the outer peripheral side is absorbed from the aqueous solution KS in the draining mold 4 into the gypsum to be porous Of the porous filter equivalent portion 5 formed in the water removal step S2, the drying step S3 of drying the porous filter equivalent portion 5 formed in the water removal step S2, and the porous filter equivalent portion 5 dried in the drying step S3 Since the porous filter 3 is formed through the firing step S4 in which the ceramic raw material is sintered by heating in an oxygen atmosphere, the aqueous solution KS containing the powder graphite 31 and the ceramic raw material is kneaded When the powdery graphite 31 is distributed substantially evenly without being unevenly distributed in the ceramic material, a large number of air bubbles released from the pores 311 of the powdery graphite 31 sorted into a predetermined particle size range are dispersed. And adhere to the periphery of the powdery graphite 31 placed. Therefore, the porous filter equivalent portion 5 formed in the drainage step S2 has a predetermined thickness by the water on the outer peripheral side being released through the pores 311 of the powder graphite 31 and the large number of air bubbles attached around the powder graphite 31. It is solidified in the form of clay. Further, in the firing step S4, the dried porous filter equivalent portion 5 is heated in a slight amount of oxygen atmosphere to sinter the ceramic raw material, so a large number of air bubbles attached around the powder graphite 31 cause the inside of the ceramic layer 32 to The pores 321 connecting the powder graphite 31 to each other are formed. In addition, although the powder graphite 31 is heated to a combustion temperature or higher, but is heated in a trace oxygen atmosphere, it is dispersed and disposed in the porous ceramic layer 32 in a state of remaining substantially without being burned. Be done. As a result, the porous filter 3 in which the powder graphite 31 is dispersed and disposed in the porous ceramic layer 32 can be easily formed.
Therefore, according to this other embodiment, the sewage treatment apparatus capable of simplifying the equipment and taking time for maintenance and the like, and capable of effectively removing coloring substances, odorous substances and the like contained in the sewage OS such as livestock manure Ten manufacturing methods can be provided.

  Further, according to the other embodiment, when the pores 311 of the powder graphite 31 become saturated by adsorbing a coloring substance, an odor substance or the like, the burning of the powder graphite 31 in the oxygen atmosphere of the porous filter 3 is caused. Since the reheating step S5 of heating at a temperature lower than the temperature is provided, the coloring substance or the odorous substance or the like adsorbed by the pores 311 of the powder graphite 31 is burned while leaving the powder graphite 31 in the porous filter 3 The porous filter 3 can be easily regenerated. Therefore, while reducing the maintenance cost further, it is possible to effectively remove coloring substances, odor substances and the like contained in the waste water OS such as livestock manure.

  The present invention is, for example, a waste water treatment apparatus comprising a porous filter in which powdered graphite capable of effectively adsorbing coloring substances, odorous substances and the like contained in waste water such as livestock manure is dispersed and disposed in a porous ceramic layer and It can be used as the manufacturing method.

1 Solid-liquid separation tank 2 Sewage treatment tank 3 Porous filter (filter)
3T Opening 4 Drainage form 5 Porous filter equivalent 10 Sewage treatment device 31 Powdered graphite 32 Ceramics layer OS Sewage KS aqueous solution S1 Mixing process S2 Draining process S3 Drying process S3 Drying process S4 Firing process S5 Reheating process

Claims (4)

A waste water treatment apparatus comprising a filter capable of adsorbing coloring substances and odorous substances contained in sewage from livestock manure,
The filter is a porous filter in which powder graphite is dispersed and disposed in a porous ceramic layer,
The powdered graphite is dispersed and disposed in the ceramic layer in a state of being in communication with a large number of pores formed in the ceramic layer, and the waste water filtered by the porous filter is through the pores of the ceramic layer Contacting said powder graphite,
Adsorbing coloring matter and odorous matter by fine pores of the powder graphite when the sewage passes through the porous filter ;
The above-mentioned powdery graphite is a graphite particle exfoliated between particles from a graphite electrode used for electric discharge machining of aluminum, and it is characterized in that it is sorted within the mesh range of 16th or less and 60th or more. apparatus. In the waste water treatment apparatus according to claim 1,
The said porous filter is a cylindrical body which stood up with the opening part upwards, The waste water treatment apparatus characterized by the above-mentioned. A method of manufacturing the wastewater treatment device according to claim 1 or 2 , wherein
A kneading step of kneading an aqueous solution obtained by adding the powder graphite, a ceramic material of clay ore powder, a coagulant, and a binder,
Draining the aqueous solution kneaded in the kneading step into a draining mold formed of gypsum, and absorbing moisture from the aqueous solution in the draining mold on the outer peripheral side into the gypsum to form a porous filter equivalent portion;
A drying step of drying the porous filter corresponding portion formed in the draining step;
A waste water treatment apparatus characterized in that the porous filter is formed through a firing step of sintering the ceramic raw material by heating the portion corresponding to the porous filter dried in the drying step under a slight oxygen atmosphere. Manufacturing method. In the method of manufacturing the waste water treatment apparatus according to claim 3 ,
The porous filter is provided with a reheating step of heating the porous filter at a temperature lower than the combustion temperature of the powder graphite under an oxygen atmosphere when the pores of the powder graphite are saturated by adsorbing a coloring substance or an odor substance. The manufacturing method of the waste water treatment apparatus characterized by the above-mentioned.