JP4763185B2 - Ozone treatment equipment and water, wastewater or sewage treatment system using it - Google Patents

Description

【００７４】
その結果、化学的酸素要求量（ＣＯＤ）、生物化学的酸素要求量（ＢＯＤ）、浮遊物質（ＳＳ）、全窒素（Ｔ-Ｎ）、リンいずれについても、水質汚濁防止法の排水基準以下の値が得られ、表１中の放流基準値と比べても充分満足できる値であった。
【００７５】
なお、本明細書で使用している用語と表現はあくまで説明上のものであって、限定的なものではなく、上記用語、表現と等価の用語、表現を除外するものではない。また、本発明は図示の実施の形態に限定されるものではなく、技術思想の範囲内において種々の変形が可能である。
【００７６】
【発明の効果】
本発明は上記構成を備え、次の効果を有する。
（ａ）本発明によれば、気液混合装置を使用することによって、単にオゾンガスを反応槽下部から気泡として噴き出させた従来の気泡接触方式と比べ、被処理液（水、廃水または下水）に多量のオゾンガスを効果的に攪拌・混合させることができ、被処理液を効率的にオゾン処理することができる。
しかも、貯留槽内の被処理液を気液混合装置との間で循環させながら、繰り返しオゾンガスと接触させるので、貯留槽内の被処理液は滞留することがなく、連続して効果的にオゾン処理される。
このように本発明によれば、オゾン処理を連続して効果的に行うことができるので、従来の気泡接触方式と比べ、より短い処理時間で被処理液を大量に処理することができる。
【００７７】
（ｂ）また、従来の気泡接触方式でオゾンガスの十分な溶解効率を得るためには、反応槽の水深を大きくする必要があり、装置全体が大型化していた。これに対し、本発明では被処理液にオゾンガスを接触させる機構そのものが異なるため、従来のような大きな反応槽は必要ではなく、被処理液を一時的に貯留する貯留槽があれば良い。
したがって、従来の気泡接触方式と比べて、同じ量の被処理液を処理する場合でも貯留槽の容積は小さくて済み、必然的に装置全体を小型化することができる。これにより、設備コストを抑えることができると共に、狭い面積で設置できる。
【００７８】
（ｃ）更に、従来の気泡接触方式と比べて、オゾンガスを被処理液に高濃度で溶解させることができるので、オゾンガスの利用率が高く、より少ないオゾンガス量でオゾン処理を行うことができる。
【００７９】
（ｄ）返送経路または／及び送出経路が、立ち上げられて構成されたガス溜りを有しているので、オゾンガスがその立ち上げ部分に滞留しやすくなり（留まりやすくなり）、オゾンガスは水、廃水または下水と良く混ざり合う。したがって、同じオゾンガス量でも、オゾンガスの利用率が高く、より少ないオゾンガス量でオゾン処理を行うことができる。
【００８０】
（ｅ）本発明に係る水、廃水または下水処理システムでは、オゾン処理装置を使用することで、水、廃水または下水を例えば河川や下水等に直接放流できる水質まで分解処理することができる。
【００８１】
【図面の簡単な説明】
【図１】 オゾン処理装置の参考例を示す概略構成図。
【図２】 オゾン処理時における貯留槽内の液位変化を示す要部拡大説明図。
【図３】 本発明に係るオゾン処理装置の一実施の形態を示す概略構成図。
【図４】 オゾン処理装置を尿汚水処理システムに採用した場合の概略構成図。
【図５】 溜槽とセラミックス接触装置を示す概略説明図。
【図６】 従来の気泡接触方式を採用したオゾン処理装置を示す概略構成図。
【符号の説明】
１，１ａ オゾン処理装置
２ 貯留槽
３ 気液混合ポンプ
４，４ａ 返送経路
４１ 返送口
４２ 返送弁
５ 送出経路
５１ 送出弁
６ 液位センサ
６１ 低位検知部
６２ 高位検知部
７ 制御装置
８ オゾンガス発生装置
１１ 流入経路
１１１ 流入口
１２ 導出経路
１２１ 導出口
２１ 原尿槽
２２ 沈殿槽
２３ 固液分離槽
２４ セラミックス接触装置
２４１ セラミックス焼結体
２５ オゾン除去槽
２６ 放流槽
７１ 溜槽
７２ 配管
Ｐ 揚水ポンプ[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an ozone treatment apparatus and a water, waste water or sewage treatment system using the same.ToRelated.
  More specifically, an ozone treatment apparatus capable of treating a large amount of liquid to be treated in a shorter treatment time and a water, waste water or sewage treatment system using the same, compared with the conventional bubble contact methodToRelated.
  In addition, downsizing of the entire system can reduce equipment costs, and an ozone treatment device that can be installed in a small area and a water, waste water or sewage treatment system using the ozone treatment device.ToRelated.
  Furthermore, an ozone treatment apparatus capable of performing ozone treatment with a smaller amount of ozone gas, and a water, waste water or sewage treatment system using the same.ToRelated.
[0002]
[Prior art]
  For example, ozone treatment is performed for wastewater treatment, sterilization and decolorization of waterworks. As a method for bringing ozone gas into contact with the liquid to be treated, a bubble contact method as shown in FIG. 6 is common. In the bubble contact method, ozone gas generated by the ozone generator 10 is blown out as bubbles from the lower part of the reaction tank 101 to be reacted.
[0003]
[Problems to be solved by the invention]
  However, ozone gas dissolves very little in water. For this reason, in order to obtain sufficient dissolution efficiency of ozone gas by the conventional bubble contact method in which ozone gas is simply jetted out as bubbles, a sufficient contact time of ozone gas and a sufficient depth of water in the reaction tank are required.
  In a further large-scale treatment plant, there has been a need to further increase the contact efficiency by, for example, increasing the number of reactors connected in series.
[0004]
  As described above, in the conventional bubble contact method, the ozone treatment takes time, and the entire apparatus is necessarily enlarged. Further, the equipment cost has increased due to the increase in size of the entire apparatus, and a large facility site area has been required.
  Furthermore, since the dissolution in the liquid to be treated is not sufficient, the utilization rate of ozone gas is low, and as a result, a large amount of ozone gas is required.
[0005]
(Object of invention)
  Accordingly, an object of the present invention is to provide an ozone treatment apparatus capable of treating a large amount of a liquid to be treated in a shorter treatment time than a conventional bubble contact method, and a water, waste water or sewage treatment system using the same.TheIt is to provide.
  Another object of the present invention is to reduce the equipment cost by reducing the size of the entire apparatus, and to install an ozone treatment apparatus that can be installed in a small area, and a water, wastewater or sewage treatment system using the ozone treatment apparatus.TheIt is to provide.
  Still another object of the present invention is to provide an ozone treatment apparatus capable of performing ozone treatment with a smaller amount of ozone gas and a water, waste water or sewage treatment system using the same.TheIt is to provide.
  Other objects of the present invention will become apparent from the following description.
[0006]
[Means for Solving the Problems]
In the first invention,
  A reservoir to which water, waste water or sewage is sent;
  A gas-liquid mixing device for mixing water, waste water or sewage discharged from the storage tank with ozone gas;
  A return path for returning the water, waste water or sewage treated by the gas-liquid mixing device back into the storage tank;
  A delivery path for delivering water, waste water or sewage treated by the gas-liquid mixing device to the outside of the storage tank;
  Control means for switching between the return route and the send route;
WithAnd
  The return path or / and the delivery path have a gas reservoir,
  It is an ozone treatment device.
[0007]
In the second invention,
  A reservoir to which water, waste water or sewage is sent;
  A gas-liquid mixing device for mixing water, waste water or sewage discharged from the storage tank with ozone gas;
  A return path for returning the water, waste water or sewage treated by the gas-liquid mixing device back into the storage tank;
  A delivery path for delivering water, waste water or sewage treated by the gas-liquid mixing device to the outside of the storage tank;
  A liquid amount detecting means for detecting the amount of liquid in the storage tank;
  Control means for switching between the return path and the delivery path based on the liquid volume detected by the liquid volume detection means;
With
  The control means includes
  When the liquid amount detecting means detects that the liquid amount in the storage tank has reached a predetermined upper limit, the return route is switched to the delivery route,
  When the liquid amount detection means detects that the liquid amount in the storage tank has reached a predetermined lower limit, the supply path is switched to the return path.The
  The return path or / and the delivery path have a gas reservoir,
  It is an ozone treatment device.
[0008]
(Delete)
[0009]
First3In the invention of
  Means for removing solids from raw water;
  Ozonate the liquid to be treated from which solids have been removed1st or 2ndAn ozone treatment device according to the invention,
It is characterized by having,
  Water, wastewater or sewage treatment systems.
[0010]
First4In the invention of
  Means for removing solids from raw water;
  Ozonate the liquid to be treated from which solids have been removed1st or 2ndAn ozone treatment device according to the invention,
  A device for bringing the treatment liquid treated with ozone into contact with the ceramic sintered body;
It is characterized by having,
  Water, wastewater or sewage treatment systems.
[0011]
First5In the invention of
  A settling tank for removing solids from water, wastewater or sewage,
  A solid-liquid separator for removing residual solids of water, waste water or sewage sent in the settling tank;
  Ozone treatment of water, waste water or sewage treated by the solid-liquid separator1st or 2ndAn ozone treatment device according to the invention,
  A device for contacting the ceramic sintered body with ozone-treated water, waste water or sewage,
  It is characterized by having,
  Water, wastewater or sewage treatment system.
[0012]
(Delete)
[0013]
  Examples of the waste water out of water, waste water or sewage include, but are not particularly limited to, livestock waste water including livestock manure and washing water.
[0014]
  Examples of the solid-liquid separation device include, but are not limited to, a device that separates a solid content from a liquid using a screen.
[0015]
  The treatment by the apparatus that is brought into contact with the ceramic sintered body is performed, for example, by flowing the liquid to be treated through a pipe filled with the ceramic sintered body having a diameter of about 10 to 20 mm. The shape of the pipe filled with the ceramic sintered body is not particularly limited.
[0016]
  The ceramic sintered body described above can be obtained, for example, as follows.
  That is, as a core material, for example, a material made of porcelain clay for earthenware is used, and as a material for covering the core, for example, rocks such as zeolite and shirasu, pulverized material obtained by crushing soil to a particle size of about 2 to 5 mm, calcium, etc. The thing which added the inorganic substance of this is used. Then, after coating the surface of the core with the above-described coating material, sintering is performed at a high temperature to obtain a target spherical ceramic sintered body.
[0017]
  The temperature during sintering is preferably 1000 ° C. or higher. When the sintering temperature is lower than 1000 ° C., there is a tendency that the coating material cannot be sufficiently fixed to the core surface.
[0018]
  The shape of the ceramic sintered body is not particularly limited to a sphere as long as it can be filled in a filler such as a pipe and does not hinder the flow of the liquid to be treated.
  The surface of the ceramic sintered body thus obtained is an effective radiator of far infrared rays including a long wavelength, and at the same time, has an effect as a catalyst for generating active oxygen.
[0019]
  Thus, by bringing the liquid to be treated into contact with the ceramic sintered body, the concentration of organic substances such as ammonia in the liquid to be treated can be reduced. Although this principle is not clear, by bringing the liquid to be treated into contact with a ceramic sintered body having a far infrared effect, the molecular group of water in the liquid to be treated is subdivided and activated, and the activated water is treated. It seems to be because it changes to odorless and harmless ammonium ion by reacting with ammonia in the liquid.
[0020]
  The main components of the ceramic sintered body are silicic acid, alumina and calcium, and the main component elements are silicon, aluminum, iron, potassium, manganese, titanium, calcium and the like.
[0021]
(Work)
  The ozone treatment apparatus according to the present invention operates as follows.
  The liquid to be treated which is water, waste water or sewage is sent into the storage tank and the gas-liquid mixing device is operated.
  The liquid to be treated derived from the storage tank is mixed with ozone gas by a gas-liquid mixing device. In the gas-liquid mixing apparatus, a large amount of ozone gas is effectively mixed with the liquid to be processed by stirring (in some cases, stirring and pressurization), and the liquid to be processed is efficiently ozone-treated.
  The liquid to be treated is ozone-treated by the gas-liquid mixing device, and then returns to the storage again through the return path. In this way, the liquid to be treated in the storage tank is gradually subjected to ozone treatment while circulating between the storage tank and the gas-liquid mixing device.
  Then, when the liquid amount in the storage tank reaches a predetermined upper limit, the liquid amount detection means detects it, the control means operates, and the return path is switched to the delivery path.
  Thereby, the to-be-processed liquid in the storage tank in which the ozone treatment was carried out is ozone-treated by the gas-liquid mixing device and then sent out from the delivery path as a treatment liquid.
[0022]
  Moreover, the liquid volume of a storage tank reduces by sending a to-be-processed liquid from a delivery path | route. Then, when the liquid amount reaches a predetermined lower limit, the liquid amount detecting means detects it, the control means is activated, and the delivery path is switched to the return path. Thereby, the to-be-processed liquid in a storage tank is ozone-processed with a gas-liquid mixing apparatus, circulating again.
  In this manner, the liquid to be treated in the storage tank repeatedly contacts with the ozone gas while being circulated between the gas-liquid mixing device and is effectively ozone-treated. Therefore, it is possible to process a large amount of liquid to be processed in a shorter processing time as compared with the conventional bubble contact method.
[0023]
  AndThe return path and / or delivery path has a gas reservoirSoOzone gas tends to stay at the start-up part (is more likely to stay), and ozone gas mixes well with water, wastewater or sewage. Therefore, even with the same amount of ozone gas, the utilization rate of ozone gas is high, and ozone treatment can be performed with a smaller amount of ozone gas.
[0024]
  The water, wastewater or sewage treatment system according to the present invention operates as follows.
  The liquid to be treated which is water, waste water, or sewage is removed from the solid by means for removing the solid such as a precipitation tank or a solid-liquid separator.
  The liquid to be processed from which the solid matter has been removed is processed by the above-described ozone processing apparatus.
  The liquid to be treated that has been subjected to the ozone treatment is treated by a device that is brought into contact with the ceramic sintered body. By bringing the liquid to be treated into contact with the ceramic sintered body, the concentration of an organic substance such as ammonia contained in the liquid to be treated can be reduced.
  By the treatment as described above, the liquid to be treated can be decomposed to water quality that can be directly discharged into, for example, a river or sewage.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
  The present invention is shown in the drawingsReference examples andThis will be described in more detail based on the embodiment.
[Ozone treatment equipment]
  FIG.IsZon processing equipmentReference exampleIt is a schematic block diagram which shows.
[0026]
  The ozone treatment apparatus 1 is mainly composed of a storage tank 2, a gas-liquid mixing pump 3 which is a gas-liquid mixing apparatus, a return path 4, a sending path 5, a liquid level sensor 6 which is a liquid amount detecting means, a control apparatus 7, and the like. The The return path 4, the transmission path 5, and each path to be described later are formed of pipes.
[0027]
  A liquid to be treated which is water, waste water or sewage is sent (inflows) from the inflow path 11 to the storage tank 2.
[0028]
  The gas-liquid mixing pump 3 sucks (inhales) the liquid to be processed that is led out from the storage tank 2 through the lead-out path 12. The gas-liquid mixing pump 3 mixes the ozone gas supplied from the ozone gas generator 8 and the liquid to be processed.
[0029]
  The liquid to be treated that has been processed by the gas-liquid mixing pump 3 is sent back into the storage tank 2 through the return path 4 or sent out of the storage tank 2 through the delivery path 5 branched from the return path 4.
[0030]
  The liquid level sensor 6 detects the liquid level (liquid amount) in the storage tank 2.
  The control device 7 switches between the return path 4 and the delivery path 5 based on the liquid level detected by the liquid level sensor 6.
[0031]
  The ozone treatment apparatus 1 has the above-described configuration and action, and performs ozone treatment while circulating the liquid to be treated between the storage tank 2 and the gas-liquid mixing pump 3.
[0032]
  Hereinafter, each component of the ozone treatment apparatus 1 will be described in detail in order.
  The liquid to be treated is continuously (or intermittently) sent to the storage tank 2 from the inflow path 11 at a predetermined flow rate. The inflow path 11 is led to the middle (in the liquid) of the storage tank 2. A plurality of inflow ports 111 are provided on the front side of the inflow path 11.
[0033]
  Thereby, the to-be-processed liquid sent from the inflow path 11 mixes well with the to-be-processed liquid in the storage tank 2. FIG. Note that only one inlet 111 may be provided.
[0034]
  In addition, as described above, the liquid to be processed sent from the inflow path 11 is guided not into the liquid from the upper part of the liquid level, thereby preventing the liquid surface from being swung by the liquid to be processed. Yes. Thus, the liquid level sensor 6 is devised so as not to adversely affect the liquid level detection accuracy.
[0035]
  Note that the liquid to be processed may flow from above the liquid level if the liquid level measurement does not adversely affect the liquid flow to be processed and the structure of the storage tank 2.
[0036]
  For example, a float type liquid level sensor 6 is provided at a predetermined height position in the upper part of the storage tank 2. The liquid level sensor 6 includes a low level detection unit 61 that detects a low level (Low) of the liquid level and a high level detection unit 62 that detects a high level (High) of the liquid level.
[0037]
  Examples of the liquid level sensor 6 include an ultrasonic sensor, a reflection type optical sensor, a capacitance type sensor, a pressure type sensor and the like in addition to the above-described float type sensor, but are not particularly limited thereto. A well-known thing can be employ | adopted.
[0038]
  As the gas-liquid mixing pump 3, for example, a vortex pump can be used, but it is not particularly limited thereto.
  Further, the amount of the liquid to be processed to be processed by the gas-liquid mixing pump 3 per unit time is set to be larger than the amount of the liquid to be processed flowing into the storage tank 2 from the inflow path 11. Thereby, the to-be-processed liquid in the storage tank 2 is gradually ozone-treated by the gas-liquid mixing pump 3.
[0039]
  The return port 41 of the return path 4 is led not to the bottom of the storage tank 2 but to the middle (in liquid) of the storage tank 2. Thereby, the liquid to be processed returned from the return path 4 is prevented from flowing out directly from the outlet 121 of the outlet path 12. Moreover, this mixes well with the liquid to be processed which flows into the storage tank 2 from the inflow path 11.
[0040]
  A return valve 42 that operates in conjunction with the liquid level sensor 6 is provided in the middle of the return path 4. The return valve 42 and a later-described delivery valve 51 have a solenoid valve structure.
[0041]
  On the other hand, a delivery valve 51 that operates in conjunction with the liquid level sensor 6 is provided in the middle of the delivery path 5. The amount of the liquid to be processed sent out from the delivery path 5 is set to be larger than the amount of the liquid to be processed flowing into the storage tank 2 from the inflow path 11. The effect on this flow rate will be described later.
[0042]
(Work)
  FIG. 2 is an enlarged explanatory view of a main part showing a change in the liquid level in the storage tank during ozone treatment.sois there.
  With reference to FIG.1 and FIG.2, the effect | action of the ozone treatment apparatus 1 is demonstrated.
[0043]
  Before the operation of the ozone treatment apparatus 1 starts, for example, the liquid level is assumed to be at a low (L) position indicated by a solid line in FIG.
  In this state, it is assumed that the return valve 42 shown in FIG. 1 is open and the delivery valve 51 is closed. As a result, the return path 4 is in an open state and the transmission path 5 is in a closed state.
[0044]
  And ozone treatment is performed as follows.
  The liquid to be treated is sent from the inflow path 11 into the storage tank 2 to operate the gas-liquid mixing pump 3.
[0045]
  The liquid to be treated in the storage tank 2 is sucked through the lead-out path 12. The gas-liquid mixing pump 3 mixes the ozone gas supplied from the ozone gas generator 8 and the liquid to be processed. In the gas-liquid mixing device, a large amount of ozone gas is effectively mixed with the liquid to be processed by stirring and pressurization, and the liquid to be processed is efficiently ozone-treated.
[0046]
  As described above, the return path 4 is in an open state, and the transmission path 5 is in a closed state. Therefore, the liquid to be treated is ozone-treated by the gas-liquid mixing pump 3 and then returns to the storage tank 2 again through the return path 4. In this way, the liquid to be treated in the storage tank 2 is gradually subjected to ozone treatment while circulating between the storage tank 2 and the gas-liquid mixing pump 3.
[0047]
  Further, since the liquid to be treated is sent from the inflow path 11, the liquid level in the storage tank 2 rises as shown in FIG. 2 (b) from FIG. 2 (a).
[0048]
  Then, as shown in FIG. 2 (c), when the liquid level rises to the high (H) position, the high level detection unit 62 of the liquid level sensor 6 detects it and the control device 7 is operated, and the return valve 42 is closed. The delivery valve 51 is opened. Therefore, the return path 4 is closed and the transmission path 5 is opened. Therefore, the liquid to be processed in the storage tank 2 that has been subjected to ozone treatment is subjected to ozone treatment by the gas-liquid mixing pump 3, and then is sent out from the delivery path 5 as a treatment liquid.
[0049]
  Further, as described above, the amount of the processing liquid delivered from the delivery path 5 per unit time is larger than that of the liquid to be treated entering from the inflow path 11. Accordingly, as shown in FIGS. 2 (c) to 2 (d), the liquid level gradually decreases.
[0050]
  Then, as shown in FIG. 2 (a), when the liquid level is lowered to the low position, the low level detection unit 61 of the liquid level sensor 6 detects it, the control device 7 is activated, the return valve 42 is opened again, and the delivery valve 51 closes. Therefore, the return path 4 is in an open state and the transmission path 5 is in a closed state. Thereby, the to-be-processed liquid in the storage tank 2 is ozone-processed with the gas-liquid mixing pump 3, circulating again.
  In this way, the liquid to be treated in the storage tank 2 is subjected to ozone treatment while repeating circulation and discharge.
[0051]
  As described above, in the ozone treatment method using the ozone treatment apparatus 1, a large amount of ozone gas is obtained by using the gas-liquid mixing pump 3 as compared with the conventional bubble contact method in which ozone gas is simply blown out from the lower part of the reaction tank. Can be effectively stirred and mixed, and the liquid to be treated can be efficiently ozone-treated.
  In addition, since the liquid to be treated in the storage tank 2 is repeatedly brought into contact with the ozone gas while being circulated with the gas-liquid mixing pump 3, the liquid to be processed in the storage tank 2 does not stay and is continuously effective. Ozone treatment.
  Thus, according to the ozone apparatus 1, since the ozone treatment can be performed continuously and effectively, the liquid to be treated can be processed in a large amount in a shorter processing time than the conventional bubble contact method.
[0052]
  Further, since the mechanism itself for contacting the ozone liquid with the liquid to be processed is different from the conventional bubble contact method, a large reaction tank as in the prior art is not necessary, and there may be a storage tank 2 for temporarily storing the liquid to be processed. .
  Therefore, as compared with the conventional bubble contact method, even when the same amount of liquid to be processed is processed, the volume of the storage tank 2 can be small, and the entire apparatus can inevitably be downsized. Thereby, while being able to hold down equipment cost, it can install in a narrow area.
[0053]
  Furthermore, compared to the conventional bubble contact method, ozone gas can be dissolved in the liquid to be treated at a high concentration, so that the utilization rate of ozone gas is high and ozone treatment can be performed with a smaller amount of ozone gas.
[0054]
  FIG. 3 shows an ozone treatment apparatus according to the present invention.oneIt is a schematic block diagram which shows embodiment.
  In addition,Reference example aboveThe same or equivalent parts are indicated by the same reference numerals. Also,Reference example aboveDescription of the portions indicated by is omitted, and differences are mainly described.
[0055]
  In the ozone treatment apparatus 1a, a part of the return path 4a led out from the gas-liquid mixing pump 3 is raised and formed in an inverted U shape to constitute a gas reservoir. ThisReference example aboveIn contrast, ozone gas tends to stay at the rising portion (is likely to stay), and the ozone gas mixes well with the liquid to be treated. Therefore, even with the same amount of ozone gas, the utilization rate of ozone gas is high, and ozone treatment can be performed with a smaller amount of ozone gas.
[0056]
  In this embodiment, the gas reservoir is configured in an inverted U shape by lowering the return path 4a that has been started up. However, if there is at least a rising portion, the gas reservoir can be configured. The raised return path 4a can be formed in an L shape without being lowered.
  Other configurations and functions are as follows:Reference example aboveSince it is the same, description is abbreviate | omitted.
[0057]
[Urine wastewater treatment system using ozone treatment equipment]
  FIG. 4 is a schematic configuration diagram when the ozone treatment apparatus is employed in a urine sewage treatment system,
  FIG. 5 is a schematic explanatory view showing a tank and a ceramic contact device.
[0058]
  A case will be described as an example where the ozone treatment apparatus 1a according to the embodiment described above is employed in a urine sewage treatment system for treating urine sewage that is wastewater discharged from a piggery or the like.
[0059]
  The manure mixture coming out of the piggery or the like is first separated into feces and urine sewage by, for example, a burn cleaner (not shown). After separation of manure, manure is composted and used as fertilizer, and urine sewage is decomposed by the urine sewage treatment system shown below and released into rivers and the like.
[0060]
  As shown in FIG. 4, the urine sewage treatment system mainly includes a raw urine tank 21, a sedimentation tank 22, a solid-liquid separation tank 23, an ozone treatment apparatus 1a, a ceramic contact apparatus 24, an ozone removal tank 25, a discharge tank 26, and the like. It is configured.
  Hereinafter, each tank and apparatus of the urine sewage treatment system will be described in detail step by step.
[0061]
  The urine sewage discharged from the pig house is temporarily stored in the original urine tank 21.
  Thereafter, the urine sewage is supplied to the settling tank 22 by overflow. In the sedimentation tank 22, solid content such as feces having a high specific gravity is removed by precipitation. The solid content after separation is composted and used as fertilizer.
[0062]
  Subsequently, the urine sewage is subjected to solid-liquid separation by a solid-liquid separation tank 23 by an immersion method using a microfiltration membrane (MF membrane: Micro Filtration Membrane), and the residual solid content is removed.
The solid content after separation is composted and used as fertilizer.
  In addition, since the solid-liquid separation tank 23 used the thing of a well-known technique, detailed description is abbreviate | omitted.
[0063]
  The urine sewage treated by the solid-liquid separation tank 23 has already been explained.FruitIt is processed by the ozone processing apparatus 1a (see FIG. 3) according to the embodiment. Ozone treatment removes COD components, chromaticity and odor from urine wastewater.
[0064]
  Ozone-treated urine sewage is temporarily stored in a reservoir 71 (not shown in FIG. 4, refer to FIG. 5), and then supplied to the ceramic contact device 24 by a pumping pump P. The ceramic contact device 24 is composed of, for example, a stainless steel pipe.
[0065]
  In this embodiment, the pipe has a diameter of about 10 cm and a length of about 1.5 m, for example. The ceramic contact device 24 is filled with a large number of spherical ceramic sintered bodies 241 of about 15 mm (for example, trade name “Bioceramic”, manufactured by Aiselatec Co., Ltd.).
[0066]
  The main components of this ceramic sintered body 241 are silicic acid, alumina, and calcium, and the main component elements are as follows. Silicon 22.9%, aluminum 8.82%, iron 5.84%, potassium 3.54%, titanium 0.39%, calcium 0.14%, manganese 0.072%, rubidium 0.037%, zirconium 0 0.03%, barium 0.025%, cesium 0.022%, antimony 0.018%, zinc 0.014%, chromium 0.012%, strontium 0.005%, nickel 0.003%, lanthanum 0.003 %, Copper 0.002%, yttrium 0.002%, lead 0.002%.
[0067]
  In FIG. 5, reference numeral 72 indicates a pipe for supplying urine sewage sent from the reservoir 71 to the ceramic contact device 24.
[0068]
  And pressure 2.5-3kg / cm²The urine sewage is passed through the ceramic contact device 24. By bringing urine waste water into contact with the ceramic sintered body 241, the concentration of ammonia can be lowered.
[0069]
  In addition, the magnitude | size (diameter and length) of the pipe which comprises the ceramic contact apparatus 24, and the number of the ceramic sintered compact 241 are changed arbitrarily by the quantity of the urine waste water to process. Further, the shape of the pipe is not particularly limited.
[0070]
  Moreover, in the ozone treatment apparatus 1a shown in FIG. 3, the above-described many ceramic sintered bodies 241 can be filled in the return path 4a that is configured to be partially started up. Accordingly, the urine wastewater can be treated with ozone and brought into contact with the ceramic sintered body 241. Therefore, the concentration of organic substances such as ammonia contained in the urine wastewater can be effectively reduced during the ozone treatment.
[0071]
  The urine sewage treated by the ceramic contact device 24 is then sent to the ozone removal tank 25 shown in FIG. And the ozone which remains in urine wastewater is removed by allowing the activated carbon provided in the ozone removal tank 25 to pass through. The treated urine sewage is sent to the discharge tank 26 and discharged into rivers and sewage.
[0072]
  As shown in FIG. 4, each processing stage(1)-(4)Water quality analysis was conducted on the urine sewage collected in (1). The results are shown in Table 1.
[0073]
[Table 1]

[0074]
  As a result, chemical oxygen demand (COD), biochemical oxygen demand (BOD), suspended solids (SS), total nitrogen (TN), and phosphorus are all below the wastewater standards of the Water Pollution Control Law. A value was obtained, which was sufficiently satisfactory even when compared with the discharge standard value in Table 1.
[0075]
  Note that the terms and expressions used in this specification are merely explanatory and are not restrictive, and do not exclude terms and expressions equivalent to the above terms and expressions. The present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the technical idea.
[0076]
【The invention's effect】
  The present invention has the above-described configuration and has the following effects.
(A) According to the present invention, the liquid to be treated (water, wastewater or sewage) is simply compared with the conventional bubble contact method in which ozone gas is simply ejected as bubbles from the bottom of the reaction tank by using a gas-liquid mixing device. A large amount of ozone gas can be effectively stirred and mixed, and the liquid to be treated can be efficiently ozone treated.
  In addition, since the liquid to be treated in the storage tank is repeatedly contacted with the ozone gas while circulating between the liquid and the gas-liquid mixing device, the liquid to be processed in the storage tank does not stay and is effectively and continuously ozone. It is processed.
  As described above, according to the present invention, ozone treatment can be performed continuously and effectively, so that a large amount of liquid to be processed can be processed in a shorter processing time than the conventional bubble contact method.
[0077]
(B) Further, in order to obtain sufficient ozone gas dissolution efficiency by the conventional bubble contact method, it is necessary to increase the water depth of the reaction tank, and the entire apparatus has been enlarged. On the other hand, in the present invention, since the mechanism for contacting ozone gas with the liquid to be treated is different, a conventional large reaction tank is not necessary, and a storage tank for temporarily storing the liquid to be treated is sufficient.
  Therefore, as compared with the conventional bubble contact method, even when the same amount of liquid to be processed is processed, the volume of the storage tank can be small, and the entire apparatus can inevitably be downsized. Thereby, while being able to hold down equipment cost, it can install in a narrow area.
[0078]
(C) Furthermore, compared with the conventional bubble contact method, ozone gas can be dissolved in the liquid to be treated at a high concentration, so that the utilization rate of ozone gas is high and ozone treatment can be performed with a smaller amount of ozone gas.
[0079]
(D) The return path or / and the delivery path has a gas reservoir that is up and configured.SoOzone gas tends to stay at the start-up part (is more likely to stay), and ozone gas mixes well with water, wastewater or sewage. Therefore, even with the same amount of ozone gas, the utilization rate of ozone gas is high, and ozone treatment can be performed with a smaller amount of ozone gas.
[0080]
(E) In the water, wastewater or sewage treatment system according to the present invention, by using an ozone treatment device, water, wastewater or sewage can be decomposed into water quality that can be directly discharged into, for example, a river or sewage.
[0081]
[Brief description of the drawings]
[Figure 1]OhZon processing equipment referenceExampleFIG.
FIG. 2 is a main part enlarged explanatory view showing a change in liquid level in a storage tank during ozone treatment.
FIG. 3 shows an ozone treatment apparatus according to the present invention.oneThe schematic block diagram which shows embodiment.
FIG. 4 is a schematic configuration diagram when an ozone treatment apparatus is employed in a urine sewage treatment system.
FIG. 5 is a schematic explanatory view showing a tank and a ceramic contact device.
FIG. 6 is a schematic configuration diagram showing an ozone treatment apparatus employing a conventional bubble contact method.
[Explanation of symbols]
  1,1a Ozone treatment equipment
  2 Reservoir
  3 Gas-liquid mixing pump
  4,4a Return route
  41 Return port
  42 Return valve
  5 Sending route
  51 Delivery valve
  6 Liquid level sensor
  61 Low level detector
  62 High level detector
  7 Control device
  8 Ozone gas generator
  11 Inflow route
  111 Inlet
  12 Derived route
  121 Outlet
  21 Raw urine tank
  22 Settling tank
  23 Solid-liquid separation tank
  24 Ceramic contact device
  241 Ceramic sintered body
  25 Ozone removal tank
  26 Discharge tank
  71 Reservoir
  72 Piping
  P pumping pump

Claims (5)

A reservoir to which water, waste water or sewage is sent;
A gas-liquid mixing device for mixing water, waste water or sewage discharged from the storage tank with ozone gas;
A return path for returning the water, waste water or sewage treated by the gas-liquid mixing device back into the storage tank;
A delivery path for delivering water, waste water or sewage treated by the gas-liquid mixing device to the outside of the storage tank;
Control means for switching between the return route and the send route;
Equipped with a,
The return path or / and the delivery path have a gas reservoir,
Ozone treatment device. A reservoir to which water, waste water or sewage is sent;
A gas-liquid mixing device for mixing water, waste water or sewage discharged from the storage tank with ozone gas;
A return path for returning the water, waste water or sewage treated by the gas-liquid mixing device back into the storage tank;
A delivery path for delivering water, waste water or sewage treated by the gas-liquid mixing device to the outside of the storage tank;
A liquid amount detecting means for detecting the amount of liquid in the storage tank;
Control means for switching between the return path and the delivery path based on the liquid volume detected by the liquid volume detection means;
With
The control means includes
When the liquid amount detecting means detects that the liquid amount in the storage tank has reached a predetermined upper limit, the return route is switched to the delivery route,
When the amount of liquid the reservoir reaches a predetermined lower limit and detected the liquid amount detecting means, Ri Citea to switch to the return path from the delivery path,
The return path or / and the delivery path have a gas reservoir,
Ozone treatment device. Means for removing solids from raw water;
The ozone treatment apparatus according to claim 1 or 2, wherein the treatment liquid from which the solid matter has been removed is treated with ozone.
It is characterized by having,
Water, wastewater or sewage treatment system. Means for removing solids from raw water;
The ozone treatment apparatus according to claim 1 or 2, wherein the treatment liquid from which the solid matter has been removed is treated with ozone.
A device for bringing the treatment liquid treated with ozone into contact with the ceramic sintered body;
It is characterized by having,
Water, wastewater or sewage treatment system. A settling tank for removing solids from water, wastewater or sewage,
A solid-liquid separator for removing residual solids of water, waste water or sewage sent in the settling tank;
The ozone treatment apparatus according to claim 1 or 2, which performs ozone treatment on water, waste water or sewage treated by the solid-liquid separator;
A device for contacting the ceramic sintered body with ozone-treated water, waste water or sewage,
It is characterized by having,
Water, wastewater or sewage treatment system.

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