JP2013146718A - Cleaning method of organic sewage and apparatus of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the water quality state of sewage, and to perform a biological treatment at the same time including an oil content.SOLUTION: A solid residue substance is removed by a solid residue removing apparatus 2 that accompanies a raw water tank 1 and wastewater is made sewage. The sewage contains oiliness, is made to the sewage of a prescribed concentration by regulating a returning water flow rate, is added with oxygen and/or ozone and performed with sludge stirring, and the water quality of the sewage is maintained to a fixed state. A treatment that generates cavitation by a jet flow is performed at the same time. Subsequently, the sewage is supplied with air and is aerated, sludge is performed with an activation treating, the sewage is contacted to porous ceramics 14, and biodegradation is promoted. The sewage in which the biodegradation has been promoted is performed with solid-liquid separation by a sedimentation tank 8, and a separation liquid of a supernatant liquid in which the solid-liquid separation has been performed is discharged as purified water. A portion of a separated sludge is sent back to a sewage control reduction tank 3, and the purification of a high cleaning efficiency is performed while performing the water quality improvement of the sewage.

Description

  The present invention relates to a sewage purification method and apparatus for treating sludge of organic wastewater such as industrial wastewater. More specifically, the present invention relates to a treatment method and an apparatus for purifying sewage by converting sewage such as organic waste water into activated sludge by microbial treatment including oily components and reforming sludge.

  In recent years, there is a concern that environmental pollution, especially the accumulation of water environmental pollutants in water areas such as rivers, lakes, and ponds has increased. For this reason, various measures have been taken to prevent pollution to the natural environment, but this is not yet sufficient, and the treatment is urgent. This is because, for example, the rivers mentioned above are contaminated with water due to the inflow of food wastewater typified by domestic wastewater, and the water quality deteriorates. When these water areas are the source of water, the pollution of these water areas will have a serious adverse effect on the surrounding environment for bad odors and other reasons from the viewpoint of deterioration of water quality and aesthetics. In addition, industrial wastewater regulations, which are regulated variously, are becoming stricter year by year, and it is necessary to review conventional wastewater treatment methods, and countermeasures are being taken.

  As for the conventional purification method, for example, the contact oxidation method, that is, by passing sewage through a contact material such as a plastic material or a honeycomb tube material, the organic matter is decomposed and purified by the decomposition action of microorganisms living on the surface of the contact material. How to do is known. Moreover, biochemical treatment (activated sludge method) is known and implemented as one of environmental conservation purifications. As the biochemical treatment, for example, an aerobic treatment method in which oxygen is given to sewage and organic substances in the sewage are treated with microorganisms, and an anaerobic treatment method in which oxygen is not given are known.

  These treatment methods are commonly used, and are based on BOD indicated by biochemical oxygen demand, COD indicated by chemical oxygen demand, etc. The processing state can be measured and grasped by numerical values such as carbon and nitrogen compounds. An example of this is an aeration method in which air and wastewater are brought into contact with each other, oxygen is dissolved in the wastewater, and given to aerobic microorganisms for decomposition treatment.

  Furthermore, it is also known that ozone is added to these treatment methods to sterilize, decolorize, deodorize, etc. with a strong oxidizing power, or to treat with ozone by an aerobic biological treatment. One of the applicants of the present application has proposed a purification technique that improves such a conventionally known technique and further improves the purification efficiency of sewage (see Patent Document 1). This stabilizes the water quality state and maintains the state to activate biological treatment. In other words, cavitation is generated by a jet, and oxygen concentration is increased by supplying oxygen and ozone, and concentrated oxygen is dissolved in treated water without waste by a highly efficient dissolution technique.

  On the other hand, as a treatment material, one of the present applicants has proposed, and a technology of a treatment material excellent in fat and oil adsorption ability is also known (see, for example, Patent Document 2). This technology is excellent in oil and fat resolution, and the adsorbent used in this technology is porous ceramics. Mixing inorganic continuous porous ceramics mainly composed of clay and silica with enzyme-containing preparations such as pineapple enzyme. It is a special ceramic that has been fixed. This makes it possible to treat the fat and oil adsorbed on the ceramics due to the oil and fat resolution of the enzyme. Furthermore, due to the physical characteristics such as pore size, surface area, water retention and air permeability of inorganic continuous porous ceramics, it is excellent in ability as a bacterial support and is also commercially available.

JP 2009-136823 A Japanese Patent Laid-Open No. 10-139564

  As described above, various purification processes for wastewater have been conventionally performed. It has also been established and implemented that wastewater is treated and discharged into rivers as purified water. However, these conventional purification methods are not necessarily efficient, and some organic substances are not sufficiently decomposed, and the current state of treatment has not yet been satisfactory. As described above, clarification is also performed to stabilize and activate the quality of wastewater by generating cavitation by a jet, but it is still insufficient in terms of simultaneously decomposing oily components. In particular, wastewater that contains a lot of oily components is physically removed in advance due to insufficient organic matter treatment by microorganisms, and is treated by another treatment method such as incineration. Most of them are processed with the oil component removed.

  This is inefficient because the organic waste is purified by separately treating the oily component and treating the organic matter from which the oil component has been removed. In addition, surplus sludge generated during sewage purification treatment by microbial treatment has been disposed of as industrial waste, and in recent years there are concerns about rising disposal costs and tight landfill sites. Furthermore, the above-mentioned porous ceramics, which have excellent oil and fat resolution, have excellent oil and fat decomposing ability, but even if incorporated in a conventional wastewater treatment system, the oil and fat decomposing ability is limited, and it is highly concentrated in large quantities. In the case of oils and fats, it was not usable.

  In order to solve the conventional problems, the present invention has been created based on the above-described technical background, and achieves the following object. An object of the present invention is to provide a purification technique and an apparatus for performing a biological treatment by stabilizing sewage water quality and activating sewage containing oily components.

The present invention takes the following means in order to achieve the object.
The organic wastewater purification method of the present invention 1
A treatment method for purifying sewage containing organic matter,
A pretreatment step of removing the solid residue in the wastewater by the solid residue removing device (2),
The flow rate of the sewage from which the solid residue has been removed is adjusted to obtain a sewage of a predetermined concentration, and oxygen and / or ozone is added to the sludge to maintain the quality of the sewage at a constant state, and cavitation is caused by a jet. A constant state maintaining process step for adding a process for generating
The activated sewage is activated by supplying air to the adjusted sewage and activating the sludge, and bringing the adjusted sewage into contact with porous ceramics (14) having pores therein to promote biodegradation. Process,
A separation treatment step for solid-liquid separation of the sewage in which the sludge is activated and biodegradation is promoted;
A discharge step of discharging the purified water of the sewage separated from the solid and liquid.

The method for purifying organic sewage according to the present invention 2 is characterized in that, in the present invention 1, the porous ceramics is a porous ceramic composite containing an enzyme preparation therein.
The method for purifying organic sewage according to the third aspect of the invention is characterized in that, in the second aspect, the porous ceramic composite is a silane coupling ceramic treated with a silane coupling agent.

The method for purifying organic sewage according to the present invention 4 is characterized in that, in the present invention 1 to 3, a process for generating cavitation by jetting is added to the sewage in the activation treatment promoting step.
The method for purifying organic sewage according to the present invention 5 is characterized in that, in the present inventions 1 to 4, the sewage in the activity promoting treatment step is sewage containing an oil component.

  The method for purifying organic sewage of the present invention 6 in the present invention 1 to 5, wherein in the separation treatment step, a part of the separated sewage is led to the steady state maintenance step and / or the activation treatment promotion step, The purification process is performed again by mixing with the sewage from the previous step.

The organic wastewater purification apparatus of the present invention 7
A treatment device for purifying sewage containing organic matter,
A raw water tank (1) accompanied by a solid residue removing device (2) for removing the solid residue from the waste water;
Adjusting the flow rate of the sewage from which the solid residue has been removed to obtain a highly concentrated sewage, and adding oxygen and / or ozone to agitate sludge to maintain the quality of the sewage in a constant state. A reduction tank (3),
A jet generating device (9) provided in association with the sewage adjusting and reducing tank (3), for generating and treating the sewage by generating cavitation by a jet;
Air is supplied to the sewage from the sewage adjustment and reduction tank (3) and aerated to activate the sludge, and the sewage is brought into contact with porous ceramics (14) having pores therein to promote biodegradation. An activity promoting treatment tank (4),
A sedimentation tank (8) for solid-liquid separation of sewage from the activity promoting treatment tank (4);
It is characterized by comprising a discharge tank (16) that stores the separated liquid separated into purified water that can be discharged.

The organic sewage purification method and the apparatus according to the present invention 8 are characterized in that, in the present invention 7, the porous ceramics (14) for promoting biodegradation is introduced into the sewage adjustment and reduction tank (3). It is characterized by.
The apparatus for purifying organic sewage according to the ninth aspect of the present invention is the apparatus according to the seventh or eighth aspect, wherein the jet generating device (9) for causing the activity promoting treatment tank (4) to process the sewage by generating cavitation by a jet. It is arranged.

The organic sewage purification method and apparatus according to the present invention 10 are characterized in that, in the present inventions 7 to 9, the porous ceramic (14) is a porous ceramic composite containing an enzyme preparation therein.
The organic wastewater purification method and apparatus according to the eleventh aspect of the present invention are characterized in that, in the tenth aspect, the porous ceramic composite is a silane coupling ceramic treated with a silane coupling agent.

  The method and apparatus for purifying organic sewage of the present invention is to stabilize sewage containing fats and oils in a sewage adjustment and reduction tank by adding oxygen and ozone and further stirring the sludge using a cavitation effect by a jet, In addition, the sewage was aerated with the supply of air in an activation promoting treatment tank having porous ceramics, and the sludge was subjected to a purification treatment to promote activation by making use of the fat and oil adsorption ability of the porous ceramics. In this way, the oily component is not removed or treated separately in the treatment process of the sewage, but purified by a biological treatment that simultaneously decomposes the fat and oil in the continuous process. As a result, it was possible to efficiently remove sludge and achieve efficient purification.

FIG. 1 is a block diagram showing a purification device of the present invention. FIG. 2 is an explanatory diagram of the jet flow generating device. FIG. 3 is a partial view showing an example in which porous ceramics is charged into a sewage adjustment / reduction tank according to another embodiment. FIG. 4 is a partial view showing a configuration in which the jet flow generating device is provided also in the active treatment promoting tank in another embodiment. FIG. 5 is a numerical table of examples showing the results of the effects of the present invention, and is a data diagram of the BOD removal rate (%). FIG. 6 is a numerical table of examples showing results of the effects of the present invention, and is a data diagram of sewage concentration.

  DESCRIPTION OF EMBODIMENTS An embodiment of a method and apparatus for purifying organic sewage according to the present invention will be described in detail based on the drawings. In the present embodiment, a series of water solutions from waste water discharged from a food factory or the like to purified water will be described as “sewage”. The raw water tank 1 is a kind of tank for temporarily storing sewage such as factory waste water and food waste water and pre-treating the sewage. The sewage in the raw water tank 1 contains a lot of SS (floating substances, insoluble substances such as suspended substances) and various miscellaneous substances such as impurities and oils and fats. For this reason, as a pre-treatment before treating the sewage in the next step, especially for solids, the solid residue such as contaminants is removed from the sewage with a screen, filter or the like as the solid residue removal device 2, and the remaining sewage is High-concentration sewage containing organic matter without solid residue.

  By removing solid residues such as foreign substances by the solid residue removing device 2, clogging of the piping can be prevented in the subsequent processing, and subsequent processing can be facilitated. A series of purification treatment of sewage containing oil is discharged from the raw water tank 1 and performed in a continuous process. The solid residue removing device 2 provided in association with the raw water tank 1 is a known screen, a filter, or the like that removes the solid residue from the fluid flowing in a fluid state and directly performs a separation process. The high-concentration sewage containing the oil from which the solid matter has been removed by the solid residue removing device 2 attached to the raw water tank 1 is guided to the sewage adjustment and reduction tank 3.

  The sewage adjustment and reduction tank 3 stores a certain amount of high-concentration sewage in the raw water tank 1 from which the solid flow such as impurities has been removed by adjusting the flow rate, and excess sludge returned from the sewage and the settling tank 8 described later. And a reduction treatment for maintaining the sewage in a constant and stable state. This flow rate adjustment is for optimizing the activated sludge treatment using the aerobic microorganism, and determines the flow rate per unit time, the sludge density, and the like.

  The sewage whose flow rate is adjusted so that the flow rate per unit time is fixed is mixed with a part of the returned sewage from the settling tank 8 to be described later, and treated to a water quality that can be maintained in a constant and stable state. Is made. By this process, the inflow load fluctuation | variation in the activity promotion processing tank 4 of the water supply destination used as the next process can be suppressed, and subsequent biological treatment can be performed stably. For this purpose, oxygen or oxygen and ozone are supplied to the sewage adjustment / reduction tank 3.

  Mainly, oxygen is for bringing sewage into a high-concentration oxygen state, ozone is for promoting an oxidizing action, and ozone also has a bactericidal action. Ozone contacts the sludge in the sludge-containing liquid and performs its oxidation reaction. Ozone treatment is known to increase oxidative decomposition efficiency when carried out in an acidic region of ph5 or less. For these treatments, both the oxygen generator 5 and the ozone generator 6 are attached to the sewage adjustment / reduction tank 3 in this example, but depending on the type and characteristics of the sewage, Only the generator 5 or the ozone generator 6 may be installed.

  In addition, as described above, a part of the sewage subjected to the solid-liquid separation process is returned to the sewage adjustment / reduction tank 3 from the sedimentation tank 8 as reduction return sludge via the pipe 7. In this way, the sewage treated so that the ratio of sludge is uniform and the flow rate per hour is a constant amount is directly removed in the activity promoting treatment tank 4 which is a processing means of the next step without removing oily components. Sent. The sewage in the sewage adjustment / reduction tank 3 is sewage in which the sewage in the raw water tank 1 and the sludge returned and returned are mixed and stirred. In the activated sludge method, the return sludge is a part of the activated sludge that is used to circulate and return a part of the sewage from the settling tank 8 described later in order to maintain the MLSS (activated sludge suspended solids) in the aeration tank at a constant concentration. Say.

  This activated sludge contains microorganisms and protozoa. By returning this, that is, by reducing the sludge, the sewage from the raw water tank 1 and the returned sludge are stirred, and further, oxygen and / or ozone are supplied to facilitate biodegradation and provide a stable and stable condition. It can be set as the sewage of the water quality which maintains a state. The sewage adjustment / reduction tank 3 is subjected to treatment such as destruction of cell membranes of excess activated sludge organic matter by the cavitation action of the jet generating device 9, and by supplying oxygen or oxygen and ozone, the activated sludge is Corresponding to the decomposed and aerated treatment, the sewage can be brought to a steady state water quality rich in oxygen.

  In the sewage adjustment and reduction tank 3, supplying oxygen contributes to increasing the oxygen concentration in advance in the sewage before being sent to the activity promoting treatment tank 4. In order to enhance such an effect, the sewage adjustment / reduction tank 3 is provided with a jet flow generating device 9 for converting the sewage into a cavitation flow, that is, a vortex flow, and supplying a nano-level input gas (oxygen, ozone). By enhancing the reaction, it is possible to purify organic matter in water, including miniaturization, sterilization, insecticide, deodorization, and the like.

  As shown in FIG. 2, the jet generating device 9 includes a flat box-shaped jet box 10 for generating a jet inside, a nozzle 11, and the like. More specifically, FIG. 2 partially shows only the entire configuration of the jet generating device 9, but the jet box 10 including the nozzle 11 has a hollow box shape and a flat box shape. JP-A-11-319819, JP-A-2000-563, and the like. A pump 12 for forcing the dirty water to flow through the jet box 10 is attached.

  The jet generating device 9 is integrally attached to the sewage adjustment / reduction tank 3. When not in use, it can be removed. The sewage sucked by the pump 12 from the suction port 13 is guided into the jet box 10 through a pipe and is jetted. As described in the above-mentioned publication, the jet box 10 is characterized in that the inside is hollow and flattened. When sewage is injected from the nozzle 11, cavitation is generated in the sewage adjustment and reduction tank 3, and the sewage To squirt. At the same time, oxygen, ozone and sewage that are atomized to the nano level are uniformly mixed.

  Since this jet generating device 9 is described in the prior art 1 and the above-mentioned publication, detailed description thereof is omitted. By applying the jet generating device 9, cell destruction of protozoa and bacteria in wastewater, cell activity invalidation, dissolved gas separation, harmful substance invalidation, emulsification, and the like are efficiently performed. This sewage treatment by jet has a balance with oxygen and ozone, but when optimum conditions are applied, nitrogen is removed to increase the oxygen concentration, and the concentrated oxygen and ozone are dissolved and injected into water to form nanobubbles. It melts and enhances the effect of sewage purification.

  This jet flow generating device 9 supplies pressurized sewage to a jet state. The processing function of the sewage adjustment / reduction tank 3 will be described again. The feature is that a batch process is first performed by a mixing process with sewage and return sludge. That is, it enables primary treatment (physical treatment) of BOD (Biological Oxygen Demand) and COD (Chemical Oxygen Demand), and sludge that is difficult to biotreat by crushing and decomposing refractory organic matter by cavitation It was possible to destroy the cells.

  Second, it does not hinder the formation of flocs, which is the key to sedimentation. Third, it can bring about stabilization of pH. By reducing the fluctuation of the sewage in the activation promoting treatment tank 4 which is a subsequent process, for example, the pH of the sewage flowing into the activation promoting treatment tank 4 is as low as 4.0 to 5.0, so mixing with the returned sludge The pH can be adjusted to 6.0 to 7.0. Fourth, the DO value (dissolved oxygen concentration) can be stabilized. When the DO (dissolved oxygen content) value is low, for example, sewage that has been about 2.0 to 3.0 mg / L on average can be improved to 10.0 mg / L or more on average. Thus, the sewage water in the optimum state is sent to the next step.

  In the aeration treatment of the activity promotion treatment tank 4 in the next step, the oxygen concentration is further increased, and wastewater with a high oxygen concentration can be obtained. In this way, the sewage in the sewage adjustment / reduction tank 3 in which the oxygen concentration is increased is aerated and guided to the activity promotion treatment tank 4 for promoting the activation process. In the activity promoting treatment tank 4, the organic sewage treated in the sewage adjusting and reducing tank 3 is subjected to aerobic biological treatment in the presence of activated sludge to biodegrade organic matter.

  The activity promoting treatment tank 4 is filled with porous ceramics 14 so that the sewage can be contacted uniformly. In the present embodiment, the porous ceramic 14 has pores communicating with the inside, and is a porous ceramic composite containing an enzyme preparation such as pineapple enzyme. The porous ceramic composite having this enzyme preparation is optimally manufactured by Philtech Co., Ltd. (head office: Minato-ku, Tokyo), and the configuration is the contents described in Patent Document 2 described above. That is, this porous ceramic is a composite ceramic in which an enzyme is fixed inside, and is a ceramic in which a natural enzyme-containing preparation is mixed and fixed in an inorganic continuous porous ceramic mainly composed of clay and silica.

The basic composition is 80 to 40% by weight of clay and quartzite as main components, 20 to 60% by weight of an enzyme preparation such as pineapple enzyme, a pore-forming material, and a predetermined amount of water, and 1000 to 1200 ° C. in a porous ceramic composite firing comprising, the composition after the _sintering, SiO 2: 68.0 to 71.0 _{wt%, Al} 2 O 3: _16.0~21.0 wt%, Fe ₂ O ₃ : 0.8 to 1.2% by weight, K ₂ O: 1.1 to 17% by weight, CaO: 0.6 to 1.3% by weight, MgO: 1.5 to 2.6% by weight Na ₂ O: 0.6 to 1.3% by weight, TiO ₃ : 0.3 to 0.4% by weight, enzyme: 0.005 to 0.02% by weight.

  The porous ceramic composite having this enzyme preparation has the following properties as a biological treatment carrier. 1. Many pores suitable for immobilizing microorganisms are retained. 2. Excellent mechanical strength. 3. Thermally and chemically stable. 4. Does not elute substances harmful to microorganisms. 5. It has both hydrophilicity and adsorptivity. In particular, it has a processing function excellent in the adsorption and decomposition of fats and oils. These functions effectively biodegrade organic matter. The porous ceramic composite is housed in a bowl-shaped case made of synthetic resin having a spherical shape and a gap, and is disposed in the activity promoting treatment tank 4. The activity promoting treatment tank 4 is provided with a blower device 15 for discharging air or oxygen bubbles from the lower part of the case and supplying them to the lower part.

  As a result, the sewage is mixed and stirred with air and oxygen, and is efficiently brought into contact with the porous ceramic composite having the enzyme preparation described above, so that oxygen is sufficiently supplied to the sewage. The activity promotion treatment tank 4 is a two-stage tank consisting of a first activity promotion treatment tank 4a into which sewage flows first and a second activity promotion treatment tank 4b into which sewage flows from the first activity promotion treatment tank 4a. Is configured. In addition, although each processing tank of the activity promotion processing tank 4 is two steps in this example, it may be three or more steps. The porous ceramic composite having the enzyme preparation is put into both tanks. Sewage that cannot be biodegraded in the first activity promoting treatment tank 4a is biodegraded in the second activity promoting treatment tank 4b.

  Basically, the first activation promotion treatment tank 4a and the second activation promotion treatment tank 4b are tanks that receive sewage from a factory or the like and perform biological treatment, and process and purify the inflowing sewage step by step. It is a tank. That is, the first activity promoting treatment tank 4a receives the high-concentration raw water and performs the primary biological treatment. Thereafter, the biological treatment is further completed in the second activity promoting treatment tank 4b, and solid-liquid separation is promoted. That is, in order to decompose the inorganic and organic components contained in the sewage by biological treatment and smoothly proceed with solid-liquid separation, first, the first activity promoting treatment tank 4a receives high-concentration raw water and performs primary biological treatment. . In addition, when the number of stages is three or more, the amount of energy used increases, but the amount of sewage treated increases. In addition, since the concentration of contamination in each stage is different, the contamination concentration in the final process is reduced when the number of stages is increased.

  Thereafter, this sewage is sent to the second activity promotion treatment tank 4b to complete the biological treatment, and thus the solid-liquid separation is promoted by passing through the two-stage activity promotion treatment tank. In the first activation promotion treatment tank 4a and the second activation promotion treatment tank 4b, the adjusted sewage from the sewage adjustment / reduction tank 3 is guided. Therefore, this sewage is mixed with the raw sewage and the returned sewage, and the organic pollutants are mixed in a certain ratio, so that it is possible to suppress fluctuations in the inflow load. Can be stabilized.

  Moreover, the nitrogen component contained in sewage in the form of organic matter or ammonia is oxidized by the aerobic treatment into nitrate. Thus, the sewage is biodegraded by microorganisms in the activity promoting treatment tank 4. Moreover, the return sludge from the sedimentation tank 8 is guided to the first activation promotion treatment tank 4a, and the activation promotion treatment tank 4 is mixed with the return sludge in the same manner as the sewage adjustment and reduction tank 3. In this way, the state is fixed and activated.

  The sewage after biodegradation is then led from the activity promoting treatment tank 4 to the settling tank 8. Since the supernatant liquid at this time is regarded as purified water, it can be guided to the discharge tank 16 in this state. In the sedimentation tank 8, the sewage containing the activated sludge is solid-liquid separated and separated into a separated liquid and separated sludge. In the present embodiment, this separation is separation of sewage introduced through the sewage adjustment / reduction tank 3 maintained at a constant state as described above, and further, this sewage promotes the activity of the porous ceramics 14. As a result of efficient processing in the processing tank 4, a larger amount of the separated liquid is discharged from the precipitation tank 8 as a result.

  The return amount of the returned sludge from the sedimentation tank 8 is managed and determined so that the ratio of the amount of ozone-treated sludge to the returned sludge amount becomes a predetermined appropriate value. In other words, it is important that the amount of sludge and the amount of microorganisms have an appropriate concentration and amount due to the destruction and oxidation of the cell membrane in the returned sludge by cavitation by the jet generating device 9. The balance between the returned sludge and the sludge by ozone treatment or the like is maintained, and the aerobic treatment is performed without inhibiting the activity of the sludge. Thereby, the fall of water quality is prevented. Further, the supernatant liquid of the sedimentation tank 8, that is, the treatment liquid is purified water, and the organic substance is decomposed by the aerobic microorganisms to a predetermined value or more, and is introduced into the discharge tank 16, and the remaining sludge is separated. It is led to the sediment tank 17 as sludge. Finally, the sewage is discharged as purified water from the discharge tank 16 to a river or the like. Before this discharge, disinfection processing is performed, for example, chlorine disinfection processing is performed.

  If the sedimentation property and dewaterability of the activated sludge are poor, the organic matter is not effectively decomposed and the inorganic content in the sludge becomes low. By applying the above-mentioned treatment, it is eliminated and the sedimentation property is improved. Further, as described above, the purification method of the present embodiment decomposes sewage containing oily components in the course of a series of sewage purification processes, so there is no need to separately decompose the oily components, It is possible to perform highly efficient processing at a low cost in a short time and with an increased removal rate. In the embodiment described above, the object of the present invention can be sufficiently achieved, but further purification efficiency can be further improved by implementing another embodiment described below.

(Other embodiment 1)
FIG. 3 is a partial view showing an example in which the porous ceramics 14 is introduced into the sewage adjustment / reduction tank 3. Biological treatment is promoted in the previous step of sending sewage to the activity promoting treatment tank 4. It is possible to improve the purification efficiency by further activation, and finally increase the removal rate of BOD, SS, N-Hex and the like of sewage by the decomposition treatment. In this case, it is preferable to install a blower device for supplying air, but it is not always necessary to install a blower device in order to save power consumption.

(Other embodiment 2)
FIG. 4 is a partial view showing a configuration in which the jet flow generating device 9 is also provided in the activity promoting treatment tank 4. The purpose is to further promote biological treatment by generating cavitation by a jet, but since the next step is a sedimentation tank 8, it must be prevented from hindering the formation of flocs, which are essential for sedimentation. Therefore, it is necessary to determine an appropriate condition according to the actual situation as to how much jet should be generated.

(Other embodiment 3)
In this example, a silane coupling ceramic is used as the porous ceramic 14. This silane coupling ceramic is obtained by treating a porous ceramic composite having the above enzyme preparation with a silane coupling agent. In addition to the properties of porous ceramic composites, silane coupling ceramics improve processing capacity not only for high-concentration oils and fats but also for high BOD. This is based on electrostatic attraction caused by microorganisms and the surface potential of the carrier among the forces acting when the microorganisms are adsorbed and immobilized on the carrier. Generally, a silane coupling agent has a function of chemically bonding an inorganic substance and an organic substance.

Silane coupling agents (for example, LS1090 (chemical formula: CF ₃ CH ₂ CH ₂ Si (OCH ₃ ) ₃ ), manufactured by Shin-Etsu Chemical Co., Ltd.) produce silanol (Si-OH) by hydrolysis, and then the silanols gradually To form siloxane bonds (Si-O-Si) to form silane oligomers. In this treatment method, after the fired porous ceramic composite is immersed in a silane coupling agent, it is pulled up and firmly bonded to the ceramic by a condensation reaction (dehydration) in a drying step. At this time, since the number of silanol groups is reduced, the reactivity is lowered and it becomes difficult to dissolve in water. Silane-coupled ceramics have a surface charge of “+”, and generally bacteria and organic substances such as contaminants have a “−” charge, so they attract each other. By introducing this silane coupling ceramic, the above-described decomposition effect is enhanced. That is, it can be expected that the treatment capacity is increased and nitrogen is removed, and the oxygen concentration is relatively increased and dissolved in sewage to increase the purification efficiency. This result was demonstrated in Example 1 as follows.

  FIG. 5 is a numerical table showing the results of the effects of the present invention, and is a data diagram of the BOD removal rate (%). The data in FIG. 5 is a comparison of the effects of two different types of porous ceramics introduced into the activity promoting treatment tank of the purifier. Two types of porous ceramics were used: a porous ceramic composite having an enzyme preparation fixed therein and a silane coupling ceramic. This processing time is 7 hours.

  In FIG. 5, FZ means a porous ceramic composite having an enzyme preparation, and FZC means silane coupling ceramic. For each, the comparison data is obtained when the aeration process is only air (aeration) and when concentrated oxygen is supplied thereto. As a result of the experiment, silane coupling ceramics improved the removal rate compared to the porous ceramic composite, and the removal rate was particularly high when concentrated oxygen was supplied.

  FIG. 6 is a numerical table showing the results of the effects of the present embodiment, and is a data diagram of sewage concentration for three types of samples. FIG. 6 shows the results of measurement similar to the example of FIG. 5, and is comparison data of sewage for two types of porous ceramic composite (FZ) having an enzyme preparation and silane coupling ceramics (FZC). Similarly to the above, the comparison data for each case where the aeration process is only air and when concentrated oxygen is supplied thereto is used. In each example, it was confirmed that the sewage concentration in the wastewater was lower than that in the conventional sewage treatment method.

  In addition, all of BOD, N-Hex, and SS are improved in silane coupling ceramics as compared with porous ceramic composites, and removal is particularly high when concentrated oxygen is supplied. Became a rate. Although there are differences depending on the sample, the high value after 7 hours is the case of supplying concentrated oxygen, but the removal rate is as high as 96% (n-Hax FZC), confirming its excellent effect did.

  In the data of the examples, BOD is an abbreviation for biochemical.oxygen.demand and refers to a value indicating a biological oxygen demand for decomposing organisms in sewage, and N-Hex is a normal hexane extract, SS is an abbreviation for suspended.solid, and is a value indicating the amount of suspended solids in sewage. As mentioned above, although embodiment of this invention was described, it cannot be overemphasized that this invention is not limited to this form, and can change within the range which does not deviate from the objective of this invention and the meaning.

DESCRIPTION OF SYMBOLS 1 ... Raw water tank 2 ... Solid residue removal apparatus 3 ... Sewage adjustment reduction tank 4 ... Activity promotion processing tank 5 ... Oxygen generator 6 ... Ozone generator 7 ... Piping 8 ... Precipitation tank 9 ... Jet generation apparatus 14 ... Porous ceramics 16 ... Discharge tank

Claims (11)

A treatment method for purifying sewage containing organic matter,
A pretreatment step of removing the solid residue in the wastewater by the solid residue removing device (2),
The flow rate of the sewage from which the solid residue has been removed is adjusted to obtain a sewage of a predetermined concentration, and oxygen and / or ozone is added to the sludge to maintain the quality of the sewage at a constant state, and cavitation is caused by a jet. A constant state maintaining process step for adding a process for generating
The activated sewage is activated by supplying air to the adjusted sewage and activating the sludge, and bringing the adjusted sewage into contact with porous ceramics (14) having pores therein to promote biodegradation. Process,
A separation treatment step for solid-liquid separation of the sewage in which the sludge is activated and biodegradation is promoted;
An organic sewage purification method comprising: a discharge step of discharging the sewage purified water separated into the solid and liquid. The method for purifying organic sewage according to claim 1,
The method for purifying organic wastewater, wherein the porous ceramic is a porous ceramic composite containing an enzyme preparation therein. In the organic sewage purification apparatus according to claim 2,
The method for purifying organic wastewater, wherein the porous ceramic composite is a silane coupling ceramic treated with a silane coupling agent. In the purification method of the organic wastewater as described in 1 selected from Claim 1 thru | or 3,
A method for purifying organic wastewater, characterized in that a treatment for generating cavitation by a jet is added to the wastewater in the activation treatment promotion step. In the purification method of the organic wastewater as described in 1 selected from Claim 1 thru | or 4,
The method for purifying organic sewage characterized in that the sewage in the activity promoting treatment step is sewage containing an oil component. In the purification method of the organic wastewater as described in 1 selected from Claim 1 thru | or 5,
In the separation treatment step, a part of the separated sewage is led to the steady state maintenance step and / or the activation treatment promotion step, mixed with the sewage from the previous step, and purified again. A method for purifying organic sewage. A treatment device for purifying sewage containing organic matter,
A raw water tank (1) accompanied by a solid residue removing device (2) for removing the solid residue from the waste water;
Adjusting the flow rate of the sewage from which the solid residue has been removed to obtain a highly concentrated sewage, and adding oxygen and / or ozone to agitate sludge to maintain the quality of the sewage in a constant state. A reduction tank (3),
A jet generating device (9) provided in association with the sewage adjusting and reducing tank (3), for generating and treating the sewage by generating cavitation by a jet;
Air is supplied to the sewage from the sewage adjustment and reduction tank (3) and aerated to activate the sludge, and the sewage is brought into contact with porous ceramics (14) having pores therein to promote biodegradation. An activity promoting treatment tank (4),
A sedimentation tank (8) for solid-liquid separation of sewage from the activity promoting treatment tank (4);
An organic wastewater purifier comprising a discharge tank (16) for storing the separated liquid separated into purified water that can be discharged. In the organic sewage purification apparatus according to claim 7,
The apparatus for purifying organic sewage, wherein the porous ceramics (14) for promoting biodegradation is introduced into the sewage adjustment and reduction tank (3). The apparatus for purifying organic sewage according to claim 7 or 8,
An apparatus for purifying organic sewage, wherein a jet flow generating device (9) is disposed in the activity promoting treatment tank (4) to cause the sewage to be treated by generating cavitation by a jet. The apparatus for purifying organic sewage according to claim 1, selected from claims 7 to 9.
The said porous ceramics (14) is a porous ceramics complex which contains an enzyme formulation inside, The purification apparatus of organic waste water characterized by the above-mentioned. In the organic sewage purification apparatus according to claim 10,
The apparatus for purifying organic wastewater, wherein the porous ceramic composite is a silane coupling ceramic treated with a silane coupling agent.

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