JP6348628B2 - Sewage treatment equipment - Google Patents

Description

  The present invention relates to a sewage treatment apparatus that performs sewage treatment using ozone.

  When a river disaster or tsunami disaster occurs, the toilet cannot be used due to a power outage, water outage, etc., or when the existing toilet alone is not sufficient at the event venue, or when construction is performed for a certain period of time at the construction site In addition, it is common for portable temporary toilets as sewage treatment equipment to be brought to the site by trucks, etc., installed, and used for several days to several weeks or even months.

  For example, Patent Documents 1 to 3 disclose this type of technology. Patent Document 1 describes a technique related to a circulating flush sewage purification device that purifies flush sewage and reuses it as toilet flushing water. Patent Document 2 describes a technique related to a temporary toilet with a sterilizing / deodorizing function that is installed in various places such as public places. Patent Document 3 describes a technique of purifying used sewage from a flush toilet or hand-washing, etc., and then supplying it to the flush toilet or hand-washing for reuse.

JP 2002-102874 A JP 2011-251023 A JP 2011-218316 A

  Temporary toilets generally use a flushing toilet system, so it is common for filth collected by using a temporary toilet to recover the pumping capacity with a vacuum car when the storage tank is full and can be used continuously. There was a problem that the number of days was limited. It was also necessary to take measures against ammonia and odor of filth. Although it is possible to replace the temporary toilet with a flush toilet, there is also a problem that it is practically difficult to flush with a waste storage tank because the filth storage tank fills up quickly.

  In this regard, the conventional temporary toilet unit for the purpose of washing with water as described in Patent Document 1 supplies oxygen by bubble back-up using a diffuser tube or the like to the reaction tank, and biooxidation action of aerobic microorganisms Because of this method, the biooxidation reaction rate is slow and the tank capacity is large. In addition, it took several weeks to maintain the organisms and stabilize the treated water. In Patent Document 1, decolorization is performed by ozone oxidation. However, since the decolorization is performed by ozone after filtering the treated water in the backing tank, it is necessary to newly provide a decolorization tank.

  Patent Document 2 describes a temporary toilet having a sterilization / deodorization function by releasing ozone generated by an ozone generator into a toilet box, but is sterilization / deodorization by gaseous ozone and is accompanied by sewage In addition, the surface sterilization and deodorizing effect of the toilet bowl was weak. Patent Document 3 proposes purification with ozone water. However, since the dissolved ozone concentration of ozone water at room temperature is 10 ppm or less, the treatment capacity is limited. Moreover, since the upper part of the reaction tank has an open structure to the atmosphere and is not a closed structure, unreacted ozone may be released into the atmosphere. Therefore, since high-concentration ozone of 10 ppm or more cannot be used, it is difficult to oxidatively decompose in a short time. Also, conventionally, there is a problem with safety and treatment performance regarding the treatment of sewage generated in temporary toilets, so a device that directly treats with ozone without going through a biological treatment device has not been put to practical use. When used, there was room for improvement in terms of achieving both a sewage treatment function and portability.

  An object of this invention is to implement | achieve the ozone use sewage treatment apparatus which was comprised compactly and was excellent in portability.

  The present invention includes a closed-type reaction tank, a raw water supply line for supplying raw water to the reaction tank, an ozone supply means for supplying ozone bubbles below a micro level, and a storage for storing treated water flowing out of the reaction tank. The present invention relates to a sewage treatment apparatus including a tank and a circulation line that circulates at least a part of the treated water stored in the storage tank to the reaction tank.

  The present invention also provides a closed type reaction vessel, a raw water supply line for supplying raw water to the reaction vessel, an ozone supply means for supplying ozone bubbles below the micro level, and an ozone concentration in a gas phase part of the reaction vessel. The present invention relates to a sewage treatment apparatus comprising: an ozone concentration measurement unit that measures water concentration; and a control unit that controls the ozone supply unit based on the ozone concentration measured by the ozone concentration measurement unit.

  It is preferable to provide a treated water tank for storing treated water so that a part of the treated water can be returned to the reaction tank.

  It is preferable that the reaction tank has a nozzle mechanism and a sewage inflow portion at a lower portion and a gas phase portion and a treated water discharge portion at an upper portion.

  It is preferable that the ozone supply means can supply ozone having an ozone concentration of 15 ppm or more, and the nozzle mechanism can generate ozone bubbles having a diameter of 10 μm or less.

  It is preferable that an ozone decomposition catalyst part is disposed in a pipe line extension part following the gas phase part in the upper part of the reaction tank.

  The sewage treatment apparatus includes an ozone concentration measurement unit that is disposed in front of the ozone decomposition catalyst unit and measures the ozone concentration, and an ozone supply amount that is predetermined according to the value of the ozone concentration measured by the ozone concentration measurement unit It is preferable to control.

  It is preferable that the sewage treatment apparatus includes a flow rate variable valve disposed in a path for supplying oxygen to the ozone supply device, and the ozone supply amount is controlled by adjusting an opening degree of the flow rate variable valve.

  The ozone supply means includes first ozone supply means for supplying ozone bubbles to the reaction tank, and second ozone supply means for supplying ozone bubbles to water flowing through the raw water supply line upstream of the reaction tank. And preferably.

  The second ozone supply means is a suction pump that sends raw water to the reaction tank, and preferably feeds raw water together with ozone bubbles into the reaction tank.

  The suction pump preferably has a fine bubble supply turbo mechanism.

  It is preferable to provide a filter capable of removing solids of 10 μm or more in the raw water supply line.

  The sewage treatment apparatus includes a water quality detection unit that measures at least one of the water quality of the reaction tank, the quality of raw water, and the quality of the treated water. Based on the detection result of the water quality detection unit, ozone concentration, ozone It is preferable that at least one of the flow rate and the pumping water amount is adjusted.

  It is preferable to treat the treated water with a reverse osmosis filtration membrane having an operating pressure of 1 MPa or less.

  It is preferable that the entire apparatus of the sewage treatment apparatus is integrated and configured to have a shape and weight that can be loaded on a truck bed.

  It is preferable that the sewage treatment apparatus includes a temporary toilet having a flush toilet and is configured as a temporary toilet unit that can use treated water for cleaning the toilet of the temporary toilet.

  The sewage treatment apparatus preferably includes a raw water tank that stores raw water to be sent to the reaction tank, and a sock filter that filters raw water before being sent to the raw water tank.

  ADVANTAGE OF THE INVENTION According to this invention, the ozone use sewage treatment apparatus which was comprised compactly and was excellent in portability is realizable.

It is a flowchart of the temporary toilet unit which concerns on one Embodiment of this invention. It is a block diagram which shows typically the electric constitution of the control part which concerns on one Embodiment of this invention. It is structural drawing of the reaction tank used for the temporary toilet unit which is one Embodiment of this invention. It is a block diagram of the temporary toilet unit which is one Embodiment of this invention. It is a block diagram of the nozzle mechanism used for the temporary toilet unit which is one Embodiment of this invention. It is a flowchart of the temporary toilet unit of 2nd Embodiment. It is a flowchart of the temporary toilet unit of 3rd Embodiment. It is a flowchart of the sewage treatment apparatus of 4th Embodiment.

  Hereinafter, a temporary toilet unit will be described as an example of a preferred embodiment of the sewage treatment apparatus of the present invention. FIG. 1 is a flowchart of a temporary toilet unit according to one embodiment (first embodiment) of the present invention. In addition, embodiment regarding the temporary toilet unit (sewage treatment apparatus) which concerns on this invention demonstrated below does not limit this invention.

<Overall Configuration of Temporary Toilet Unit of First Embodiment>
First, the temporary toilet unit 100 of 1st Embodiment is demonstrated. As shown in FIG. 1, the temporary toilet unit 100 of the first embodiment includes a temporary toilet 12, a raw water tank 16, an ozone supply device 2, a reaction tank 7, a treated water tank 10, and a control unit 90. Prepare as the main configuration. Hereinafter, each structure, structure, and function which comprise the temporary toilet unit 100 are demonstrated.

<Temporary toilet>
First, the temporary toilet 12 serving as a sewage source to be treated will be described. The temporary toilet 12 of the present embodiment includes a flush toilet 13, a water tank 14, and a toilet pump 15. The flush toilet 13 is supplied with toilet flush water stored in the water tank 14. The water tank 14 is configured to be able to supply treated water that has been treated with sewage and discharged water, which will be described later. The toilet pump 15 sends the sewage discharged from the temporary toilet 12 to the raw water tank 16.

  In addition, the water used for a hand-washing or a washing toilet seat uses the water supplied from the tap water tank (illustration omitted) which has a pressurized water supply pump function and is supplied with a tap water. Further, as the toilet pump 15, a drainage pressure pump having a function of crushing foreign matters can be used.

<Raw water tank>
In the raw water tank 16, sewage sent from the toilet pump 15 through the sewage pipe 151 and sewage and sewage sent through the sewage sewage pipe 152 are stored as a mixed liquid. The raw water tank 16 is connected to the reaction tank 7 through the raw water supply line 181, and the sewage once stored in the raw water tank 16 is sent to the reaction tank 7 through the raw water supply line 181.

<Filter as a sewage pipe filtration unit>
A sewage pipe 151 connecting between the toilet pump 15 and the raw water tank 16 is provided with a sock filter 155 as a means for removing foreign matter, and the sewage is filtered by the sox filter 155 and transferred to the raw water tank 16. In the present embodiment, as the sock filter 155, one that sends the sewage to be treated to the downstream side with a filtration accuracy of 110 μm and a BOD of less than 600 mg / L is used. In addition, as a means to filter raw | natural water, it is not necessarily limited to the sock filter 155, It can change according to circumstances, such as a normal filter of about 100 microns.

  The raw water supply line 181 is provided with a raw water pump 18 as a suction pump having a self-sufficiency function, and the raw water pump 18 pumps sewage to a sewage inflow portion 74 provided in the reaction tank lower portion 71. In the reaction tank 7 of the present embodiment, a self-contained pump capable of supplying 1 to 20 L / min of sewage is used as the raw water pump 18.

  As the raw water pump 18, a general ground-mounted self-contained type is installed, or an underwater pump is installed in the raw water tank 16 to supply raw water from the raw water tank 16 to the reaction tank 7. In addition, as will be described in a second embodiment to be described later, the configuration of the raw water pump 18 can be appropriately changed according to circumstances.

<Filter as raw water line filtration unit>
The filter 17 is a raw water line filtration unit disposed in the raw water supply line 181. A filter 17 having a size of 10 microns or less is used. The filter 17 of the present embodiment is configured to be able to remove cellulose resulting from toilet paper. It is desirable to be able to filter a substance having a relatively small pressure loss of 10 microns or more so that foreign matter is not clogged in a nozzle provided in a nozzle mechanism 3 to be described later. The sewage generated in the flush toilet 13 provided in the temporary toilet 12 passes through the raw water tank 16 and is filtered by the filter 17 and then flows into the reaction tank 7 from the sewage inflow portion 74 at the lower part of the reaction tank 71.

<Raw water sensor>
The raw water sensor 31 is a raw water quality measuring unit that measures the quality of sewage (raw water) such as turbidity at the entrance of the reaction tank 7. The raw water sensor 31 may be any sensor that can estimate water quality using a PH meter, a conductivity meter, a TOC meter, a DO meter, or the like. In addition, if the place which installs a raw | natural water sensor is in piping paths, such as the reaction tank 7, it can change suitably.

<Water meter>
In the present embodiment, the water meter 29 is disposed between the raw water sensor 31 that detects the supply amount of the raw water in the raw water supply line 181 and the sewage inflow portion 74. The water meter 29 measures the amount of water supplied to the reaction tank 7. The water amount information measured by the water meter 29 is sent to the control unit 90 described later. Note that the location of the water meter 29 is not limited to this location. For example, the water meter 29 can be arranged on the upstream side of the raw water sensor 31 in the raw water supply line 181.

<Ozone supply device>
The ozone supply device 2 is an ozone supply unit that supplies ozone to the reaction tank 7 through the ozone supply pipe 210. The ozone supply device 2 of the present embodiment is provided between an oxygen generator 4 that sends oxygen to the ozone generator 5, an ozone generator 5 that generates ozone from oxygen, and the oxygen generator 4 and the ozone generator 5. The flow rate variable valve 6 is configured to be included.

  The oxygen generator 4 is oxygen supply means for supplying oxygen for generating ozone to the ozone generator 5. The ozone generator 5 generates ozone from oxygen supplied by the oxygen generator 4 by means such as air discharge. In the present embodiment, a silent discharge ozone generator (rated AC 100 V, 6.9 A) manufactured by Air Technica is used as the ozone generator. When the amount of ozone generated by the silent discharge type ozone generator is 11 L / min of supply oxygen, the one that was 40 g / hr is used. In addition, the method of producing | generating ozone can be suitably changed according to a situation. Instead of the oxygen generator 4, an oxygen cylinder can be used simply.

  The ozone supply device 2 of the present embodiment further includes an ozone concentration sensor (not shown) for detecting leakage of ozone to the outside. The ozone concentration sensor is disposed at the lower part of the ozone supply device 2, and can detect ozone with higher specific gravity than air with high accuracy. In the present embodiment, a sensor capable of detecting ozone in the order of ppb is used as the ozone concentration sensor disposed in the ozone supply device 2.

<Flow variable valve>
The variable flow valve 6 is configured to be able to adjust the supply amount of oxygen sent from the oxygen generator 4 to the ozone generator 5. If the opening of the variable flow rate valve 6 provided between the oxygen generator 4 and the ozone generator 5 is reduced to reduce the amount of oxygen supplied, the amount of ozone generated decreases, and the ozone from the ozone supply device 2 to the reaction tank 7 is reduced. Supply volume decreases. Conversely, when the opening of the variable flow valve 6 is increased, the oxygen supply amount increases and the ozone supply amount from the ozone supply device 2 to the reaction tank 7 increases.

  The ozone supply device 2 of the present embodiment is configured to be able to supply ozone having an ozone concentration of 15 mg / L (15 ppm) or more to the reaction tank 7. The ozone supplied from the ozone supply device 2 is sent into the reaction tank 7 through the nozzle mechanism 3 incorporated in the lower part of the reaction tank 7.

<Input ozone concentration sensor>
In the present embodiment, an input ozone concentration measurement sensor 21 is provided between the ozone supply device 2 and the reaction tank 7. The input ozone concentration measurement sensor 21 is an ozone sensor that measures the ozone concentration of ozone supplied to the reaction tank 7. This input ozone concentration measurement sensor 21 makes it possible to optimally control ozone according to the difference in concentration with a residual ozone concentration measurement sensor 22 described later, and to provide a safe and efficient temporary toilet.

<Reaction tank>
The reaction tank 7 is a closed reaction tank that performs sewage treatment inside thereof. In the following description, “reaction tank” means “closed reaction tank” unless otherwise specified. The “reaction tank lower part (closed reaction tank lower part)” indicates the part from the center to the lowermost part, and the “reaction tank upper part (closed reaction tank upper part)” means the center part to the uppermost end part. The site shall be indicated. In addition, “closed type” means that most of the air layer portion is not directly open to the atmosphere. For example, the “closed type” is connected to the reaction layer to the outside via a sealed portion. And a part provided with an exhaust structure capable of releasing a small amount of gas through a filter or the like. As shown in FIG. 1, the reaction tank 7 of this embodiment is configured to include a nozzle mechanism 3, a residual ozone concentration measurement sensor 22, an ozone decomposition catalyst unit 75, and an exhausted ozone concentration measurement sensor 76. The More specifically, a sewage inflow part 74 into which sewage (raw water) to be sewage treated flows and a nozzle mechanism 3 into which ozone supplied from an ozone supply device 2 described later flows in are incorporated in the reaction tank lower part 71. . In addition, a residual ozone concentration measurement sensor 22, an ozone decomposition catalyst unit 75, an exhausted ozone concentration measurement sensor 76, and a treated water discharge unit 77 are installed in the reaction tank upper part 72.

<Nozzle mechanism>
The nozzle mechanism 3 is configured to be able to be discharged into the reaction tank 7 as fine bubbles of 10 microns or less upon receipt of ozone from the ozone supply device 2. It is desirable that the nozzle mechanism 3 has a relatively small pressure loss and can generate a bubble diameter of 1 micron to 10 microns or less in accordance with the pollution degree of raw water to be treated, but an optimal one can be selected depending on the raw water concentration. . An example of the configuration of the nozzle mechanism will be described later.

  When the sewage to be treated is supplied from the raw water supply line 181 through the nozzle mechanism 3, the sewage rises as an upward flow while being oxidized and purified in contact with the ozone fine bubbles 8, and is formed in the upper reaction tank 72. It is sent from the treated water discharge unit 77 to the treated water tank 10. Inside the reaction tank 7, sewage (raw water) is converted into low molecular chemicals by hydrolysis, etc. due to the oxidation of BOD components and COD components such as carbohydrates and lipids by ozone ejected as bubbles from the nozzle mechanism 3. By doing so, the BOD component and the COD component are reduced. And it is sent to the treated water tank 10 by the treated water piping 9 from the treated water discharge part 77 provided in the upper part of the reaction tank 7 as treated water, and is stored in the treated water tank 10.

  In the reaction tank 7, the residence time of the sewage is adjusted every predetermined time according to the amount of inflow water from the temporary toilet 12. In the present embodiment, the operation is performed in accordance with various conditions such as the amount of inflow water with 0.3 to 3 hours as a guide.

<Ozone decomposition catalyst part>
The ozone decomposition catalyst unit 75 decomposes ozone to lower the ozone concentration. The ozone decomposition catalyst part 75 is disposed in a pipe line extension 110 connected so as to follow the gas phase part 73 formed in the reaction tank upper part 72. As described above, ozone supplied to the inside of the reaction tank 7 by the ozone supply device 2 is used for oxidative decomposition and consumed, but not all of it is consumed, and even if the ozone concentration is lowered, Residual ozone 1 may be generated in the phase portion 73. Depending on the concentration of residual ozone 1, it may not be released into the atmosphere as it is. The ozone decomposition catalyst unit 75 is configured to reduce the residual ozone concentration to a safe level (1 ppm) that can be opened to the atmosphere as it is. The ozonolysis catalyst used in the ozonolysis catalyst portion 75 of the present embodiment is mainly composed of zeolite. In the ozone decomposition catalyst unit 75, a linear flow rate of 0.6 m / second or less and a catalyst contact time of about 1 second or more are set as desirable conditions. Further, since residual ozone contains a large amount of moisture, the catalyst is covered with a heat jacket (incorporated with a 180 W heater) to keep the temperature, and is adjusted so as not to fall below 50 ° C.

<Residual ozone concentration sensor>
The residual ozone concentration measurement sensor 22 is an ozone concentration measurement unit that measures the ozone concentration for controlling the operation of the device. The residual ozone concentration measurement sensor 22 of the present embodiment is disposed on the upstream side of the ozone decomposition catalyst unit 75 in the pipe extension 110 connected to the gas phase unit 73 and is oxidatively decomposed by the ozone decomposition catalyst unit 75. Measure the previous ozone concentration. As the residual ozone concentration measurement sensor 22, a sensor capable of measuring ozone in the order of ppm, for example, 0 to 100 ppm is used. As an example of the residual ozone concentration measuring sensor 22, there is an ozone gas concentration monitor 200g / Nm ³ manufactured by Air Technica Co., Ltd., which measures an optical absorption spectrum of ultraviolet rays.

<Exhaust ozone concentration sensor>
The discharged ozone concentration measuring sensor 76 is an ozone concentration measuring unit that measures the ozone concentration in order to measure whether the discharged ozone concentration is sufficiently safe as compared with the environmental standard and the safety standard. The exhaust ozone concentration measurement sensor 76 of the present embodiment is disposed on the downstream side of the ozone decomposition catalyst part 75 in the pipe extension part 110 connected to the gas phase part 73, and is oxidized and decomposed by the ozone decomposition catalyst part 75. Check the ozone concentration later. That is, the exhausted ozone concentration measurement sensor 76 detects the ozone concentration before being released to the atmosphere. As the exhausted ozone concentration measuring sensor 76, an ozone sensor capable of measuring ozone at a low concentration of at least 0 ppm to 50 ppm, more preferably ppb order, for example, 0 to 250 ppb is used. An example of the exhaust ozone concentration measuring sensor 76 is not limited to a measuring instrument, and a semiconductor type sensor such as A051020-SP61 manufactured by FIS Corporation may be used. The ozone concentration of the exhaust gas 19 discharged to the atmosphere is monitored by the discharged ozone concentration measuring sensor 76. When the ozone concentration level of the exhaust gas 19 exceeds a certain value, an alarm (not shown) as a notification unit is activated and control for stopping the entire apparatus can be performed. Thereby, the fail safe which improves safety | security further is implement | achieved.

<Treatment water discharge unit>
The treated water discharge unit 77 discharges the treated water treated in the reaction tank 7 to the treated water tank 10. The treated water discharge part 77 of the present embodiment communicates with the inside of the reaction tank 7. Specifically, the inside of the reaction tank 7 communicates with the atmosphere via a treated water pipe 9 having a U-shaped sealed structure. The treated water pipe 9 is a pipe for pouring treated water into the treated water tank 10, and the tip is open to the atmosphere.

  In addition, the gas phase portion 73 of the present embodiment is provided with a communication port 79 having a function of communicating with the reaction tank 7 and the atmosphere. If the communication port 79 has a diameter of several millimeters, it will function sufficiently. An air trap designed to prevent residual ozone from leaking into the atmosphere by installing a check valve between the reaction tank and the atmosphere to prevent ozone gas from leaking into the atmosphere, or by collecting water in a U-shaped pipe. A (sealed) structure is also an effective means. From the viewpoint of quickly stabilizing the water level, the communication port 79 is preferably formed, but the communication port 79 may be omitted and the gas phase portion 73 communicating with the atmosphere may be formed by the treated water pipe 9.

<Defoamer inlet>
In addition, a defoamer inlet 20 is disposed in the reaction tank 7. In the gas phase portion 73, fine bubbles are frequently generated due to the influence of a surfactant or the like due to the back-up of ozone bubbles. When foam is generated, the foam rises in the pipeline, the exhausted ozone concentration measurement sensor 76 and the ozone decomposition catalyst unit 75 may get wet, and malfunctions may occur due to deterioration or malfunction. It is desirable to provide such means. Usually, it is effective to provide a pipe hole into which liquid can be injected from outside the system and to inject the antifoaming agent into the gas phase part 73 from the antifoaming agent inlet 20 as needed from the outside.

<Processed water sensor>
A treated water sensor 32 as a treated water quality measuring unit that measures the quality of treated water is disposed in the treated water pipe 9 of the present embodiment. The treated water sensor 32 may be any sensor that can estimate water quality with a PH meter, a conductivity meter, a TOC meter, a DO meter, or the like. In addition, the place which installs a treated water sensor can be changed suitably, such as the treated water discharge part 77 of the reaction tank 7. FIG.

  Since the pressure loss of the treated water pipe 9 occurs, the liquid level of the gas phase portion 73 changes. It is desirable to design the change width of HWL (maximum water level) and LWL (minimum water level) to be about 100 mm, and LWL (minimum water level) is treated water discharge part 77. It becomes the height of the lowest end of the inner diameter of the treated water pipe 9.

  When the water level rises above HWL (maximum water level), water enters the pipe extension 110 following the gas phase part 73, and the ozone decomposition catalyst part 75 and the exhausted ozone concentration measurement sensor 76 get wet. there's a possibility that. Therefore, when the water level rises beyond HWL (maximum water level), it is also an effective means to stop the supply of raw water by stopping the pump. In this case, a liquid level sensor is provided in the vicinity of the gas phase portion 73 for detection.

<Treatment water tank>
The treated water tank 10 stores treated water obtained by treating the sewage pumped to the sewage inflow portion 74 provided in the reaction tank lower portion 71 in the reaction tank 7. The treated water stored in the treated water tank 10 is supplied to the water tank 14 as toilet flushing water through the toilet flushing water pipe 11 connected to the treated water tank 10 by the treated water pump 101. By reusing the treated water as the toilet flushing water of the flush toilet 13, it becomes possible to function as a water circulation type temporary toilet.

  In the present embodiment, a flush water filtering unit 105 is provided in the toilet flushing water pipe 11. The washing water filtration unit 105 employs a system in which two RO membrane fresh water purifiers are alternately operated. What was processed by the washing water filtration part 105 is sent to the water tank 14 as toilet bowl washing water.

<Discharge pump>
The treated water tank 10 of this embodiment includes a discharge pump 24 that discharges a part of the treated water to the outside of the system through the discharge water pipe 26. As the frequency of use of the temporary toilet 12 increases, the amount of miscellaneous wastewater that does not depend on circulating water, such as hand-washing water, increases into the raw water tank 16, so that a water discharge flow that discharges water outside the circulation system becomes possible. ing. In the water discharge flow, part of the treated water can be discharged out of the system as discharge water using the discharge pump 24. In the present embodiment, a reverse osmosis filtration membrane 23 and a switching valve 25 are arranged in a path for discharging the discharged water through the discharged water pipe 26.

<Reverse osmosis filtration membrane>
The reverse osmosis filtration membrane 23 treats treated water discharged from the treated water tank 10 through the discharge water pipe 26 by the discharge pump 24. In this embodiment, a low pressure reverse osmosis filtration membrane having an operation pressure of 1 MPa or less is used. As a result, nano-order fine particles are removed and discharged as transparent discharge water, which makes it possible to provide a temporary toilet that satisfies various environmental standards and is legally safe and secure. By using a low pressure reverse osmosis filtration membrane with an operation pressure of 1 MPa or less, there is no osmotic pressure as much as seawater. Therefore, even if the operation pressure of the reverse osmosis filtration membrane 23 is suppressed to 1 MPa or less, a sufficient effective pressure can be obtained. By keeping it low and operating at the minimum required operating pressure, the initial cost can be reduced.

<Switching valve>
The switching valve 25 can select whether the discharged water is discharged through the discharged water pipe 26 or is recirculated for cleaning the toilet of the temporary toilet 12. By recirculating a part of the discharged water for toilet flushing by the switching valve 25, it is possible to cope with the case where efficient circulation of water is desired, and the convenience can be further improved.

<Circulating treatment operation>
The temporary toilet unit 100 of the present embodiment incorporates a circulation processing operation method. In the temporary toilet 12, the usage frequency tends to vary depending on the time zone. For example, the temporary toilet 12 is generally less frequently used at night than in the daytime, and less sewage flows. Therefore, in the present embodiment, a method is adopted in which the treated water stored in the treated water tank 10 is recirculated to the reaction tank and further purified in a time zone where the usage frequency is low, such as at night. As a result, the equipment can be effectively used. Specifically, it can be realized by recirculating to the reaction tank 7 by the circulation pump 33 provided in the treated water tank 10 described above.

  The circulation processing operation may be switched manually by visual inspection, or may be controlled by the control unit 90 under a predetermined condition.

<Control unit>
The control unit 90 is a computer that performs various controls of the temporary toilet unit 100. FIG. 2 is a block diagram schematically showing an electrical configuration of the control unit 90 according to an embodiment of the present invention. As shown in FIG. 2, the control unit 90 includes an input unit, an output unit, a program stored in a storage unit (not shown) and the like, and is electrically connected to each component of the temporary toilet unit 100. Control each component. The control unit 90 is accommodated in the control panel 27 as shown in an example of a structure to be described later (see FIG. 4). The control unit 90 of the present embodiment is configured to be able to execute various controls such as circulation processing operation control, water quality control, and ozone supply amount control.

<Circulation processing operation control>
First, a case where water quality circulation operation control is performed based on water quality as a predetermined condition will be described. The control part 90 acquires the detected value of the treated water sensor 32, and performs water quality circulation process operation control which performs a circulation process operation when the numerical value of the quality of this treated water is below predetermined. In the circulation processing operation control, the driving of the treated water pump 101 and the like are stopped, while the circulation pump 33 is driven to circulate the reaction tank 7.

  Next, a case where the control unit 90 performs the time circulation processing operation control according to the time zone will be described. The control unit 90 includes a timer that outputs time information, acquires time information from the timer, and executes time operation control that controls driving of the circulation pump 33 based on the time information. For example, the control unit 90 performs control such as driving the circulation pump 33 and stopping the treated water pump 101 so that the circulation processing operation is performed at night when the usage frequency is low.

  Although an example of the circulation treatment operation control has been described above, a configuration may be adopted in which water quality circulation treatment operation control and time circulation control are combined for circulation. For example, the control may be such that the circulation process is stopped when the quality of the treated water reaches the standard based on the detection value of the treated water sensor 32 during the nightly circulation process.

<Water quality control>
Next, optimal water quality control for controlling the ozone concentration, the ozone flow rate, and the pumping water amount based on the water quality measurement by the control unit 90 will be described. In the water quality control, the raw water sensor 31 for measuring the quality of raw water such as a turbidimeter provided at the entrance of the reaction tank 7 measures the quality of the raw water and the quality of the treated water in the treated water pipe 9. The quality of treated water is measured by the sensor 32.

  The control unit 90 acquires a water quality value based on the detection value of the raw water sensor 31 and the detection value of the treated water sensor 32, and controls the ozone concentration, the ozone flow rate, and the pump water supply amount according to the water quality value. For example, when the water quality of the treated water sensor 32 tends to be poor, the ozone supply device 2 is controlled to increase the supply amount of ozone, and when the water quality has sufficiently reached the standard, the control is performed to decrease the ozone supply amount. I do.

<Ozone supply control>
Next, the optimal control of residual ozone and ozone supply amount by the control unit 90 will be described. The control unit 90 acquires the detection value of the residual ozone concentration measurement sensor 22 and controls the ozone supply amount from the ozone supply device 2 based on a predetermined value. When the organic matter concentration (contamination degree) in sewage is high, even if high-concentration ozone is supplied, most of the supplied ozone is consumed by the sewage purification reaction (oxidation reaction) in the liquid phase. On the other hand, when the organic matter concentration (contamination degree) of sewage is low, if high-concentration ozone is supplied, ozone that could not be reacted reaches the gas phase portion 73 of the reaction tank 7 and is discharged from the reaction tank 7 to the outside. It will be. From the viewpoint of realizing compactness of the temporary toilet unit 100 including the reaction tank 7, a configuration capable of supplying high-concentration ozone to the reaction tank 7 in a range where the ozone concentration of the gas phase portion 73 does not exceed a predetermined value is realized. There is a need. Therefore, the control unit 90 performs control to supply high-concentration ozone to the reaction tank 7 in a range where the ozone concentration does not exceed a predetermined value based on the detection value of the residual ozone concentration measurement sensor 22.

  Moreover, when the density | concentration of the residual ozone 1 raises in the reaction tank 7, the load to the ozone decomposition catalyst part 75 will rise, and there exists a possibility that sufficient process cannot be performed depending on the case. Moreover, since ozone is input excessively, the operation efficiency of the entire apparatus is lowered. Therefore, by controlling the amount of ozone supplied from the ozone supply device 2 to a predetermined value in accordance with the value of the residual ozone concentration measurement sensor 22 provided in front of the ozone decomposition catalyst unit 75, the ozone decomposition catalyst unit 75 has an excessive amount. An excessive supply of load and ozone can be prevented, and safe and energy-saving operation is possible.

  The adjustment of the supply amount of ozone supplied by the ozone supply device 2 can be performed by controlling the oxygen generator 4 or the ozone generator 5 or both. For example, the same effect can be achieved by controlling the oxygen generation amount of the oxygen generator 4 according to the value of the residual ozone concentration measurement sensor 22. Further, by controlling the ozone generation amount of the ozone generator 5 according to the value of the residual ozone concentration measurement sensor 22, the same effect can be obtained.

<Batch operation control>
The control unit 90 can also perform batch operation control. For example, the driving of the raw water pump 18 is stopped in a state where a predetermined amount of raw water is fed into the reaction tank 7, and supply of ozone by the ozone supply device 2 is started. The supply of ozone by the ozone supply device 2 is continued until the sewage treatment is completed. Further, in the present embodiment, by performing batch processing while performing the above-described <ozone supply amount control>, it is possible to prevent the ozone amount from being excessively supplied even when batch processing is performed. The completion timing of batch processing is determined based on time, water quality, residual ozone concentration, or a combination thereof. For example, when the time, water quality reference value, and residual ozone concentration are values greater than or equal to a predetermined value, it can be determined that the batch processing has been completed.

<Water volume control>
Further, the control unit 90 can control the raw water pump 18 and the like based on the water amount information detected by the water meter 29 to increase or decrease the amount of input sewage supplied to the reaction tank 7. For example, in combination with the above <Ozone supply control>, the amount of input ozone and the supply of raw water (amount of pollutants) must be balanced to reduce the amount of water when it cannot be treated sufficiently, or the amount of water if there is room for treatment. Can be increased. As a result, even when the reaction rate is high, precise control is possible according to the actual situation, and operation can be performed with higher efficiency.

<Combination of each control>
The above-described circulation processing operation control, water quality control, ozone supply control, batch operation control, and water amount control can be performed in combination. For example, if the water quality does not conform to environmental standards after performing batch processing, a configuration can be adopted in which sewage treatment is performed again by performing a circulation processing operation. In addition, while performing the circulation treatment operation control, the detection values of the raw water sensor 31, the treatment water sensor 32, and the residual ozone concentration measurement sensor 22 can be monitored, and the ozone supply amount can be set based on these detection values. In addition, the circulation processing operation may be configured to be manually switched and then to perform control that combines water quality control, ozone supply control, or both. Moreover, it is good also as a structure which performs control only in any one of circulation process operation control, water quality control ozone supply control, batch operation control, and water amount control. Thus, the above-described controls can be used in combination.

According to 1st Embodiment described above, there exist the following effects.
A temporary toilet unit 100 as a sewage treatment apparatus of the present embodiment is stored in a reaction tank 7 for purifying sewage with ozone, a treatment water tank 10 for storing treated water flowing out from the reaction tank 7, and the treatment water tank 10. And a circulation line 102 for circulating a part of the treated water to the reaction vessel. Thereby, a part of the treated water purified in the reaction tank 7 can be circulated again to the reaction tank 7 to further purify the treated water. Therefore, even when the reaction tank 7 having a relatively small capacity is used, the sewage can be suitably purified, so that a compact temporary toilet unit 100 (sewage treatment apparatus) having excellent portability can be realized.

When the organic matter concentration (contamination degree) in sewage is high, even if high-concentration ozone is supplied, most of the supplied ozone is consumed by the sewage purification reaction (oxidation reaction) in the liquid phase. On the other hand, when the organic matter concentration (contamination degree) of sewage is low, if high-concentration ozone is supplied, ozone that could not be reacted reaches the gas phase of the reaction tank and is discharged from the reaction tank 7 to the outside. . Therefore, the temporary toilet unit 100 (sewage treatment apparatus) is measured by the residual ozone concentration measuring sensor 22 (ozone concentration measuring portion) that measures the ozone concentration in the gas phase portion of the reaction tank 7 and the residual ozone concentration measuring sensor 22. And a control unit 90 that controls the ozone supply device 2 based on the ozone concentration. As a result, the ozone concentration in the gas phase portion of the reaction vessel 7 can be monitored and high concentration ozone can be supplied to the reaction vessel 7 within a range where the ozone concentration in the gas phase portion 73 does not exceed a predetermined value. While increasing the capacity, it is possible to prevent the emission of ozone exceeding a predetermined value to the outside. Therefore, since the sewage treatment apparatus can be configured with high performance and high safety, a compact sewage treatment apparatus having excellent portability can be realized.
In the present embodiment, since the detection value of the residual ozone concentration measurement sensor 22 disposed in front of the ozone decomposition catalyst unit 75 is used, the state of the gas phase portion after the treatment can be reflected in the ozone supply amount with good responsiveness. It is possible to realize high-accuracy operation control that matches the actual situation.
In addition, as a means for detecting the ozone concentration in the gas phase portion, the same control may be performed based on the detection value of the exhausted ozone concentration measuring sensor 76 instead of the residual ozone concentration measuring sensor 22. By using the detection value of the exhausted ozone concentration measurement sensor 76, the ozone concentration of the exhausted gas can be detected more strictly. This configuration is also effective from the viewpoint of further improving safety.

  Generally, ozone is applied to treated water after biological treatment represented by the activated sludge method, as reported in the 2009 report on technical evaluation of ozone treatment technology issued by the Japan Sewerage Corporation. However, according to the present embodiment, it is possible to realize a treatment apparatus that can perform a safe and good treatment with respect to a technique that directly applies ozone to raw water that has not undergone biological treatment. Furthermore, regarding “treatment performance” realized by the configuration of the present embodiment, although depending on conditions, by supplying ozone with an ozone bubble diameter of 10 microns or less, an ozone concentration of 50 ppm, and an ozone flow rate of 10 L / min, raw water BOD of 200 ppm is obtained. It is possible to operate at a removal rate of 90% in 20 ppm treated water BOD. Although the reaction time of the raw water in the reaction tank was 0.5 to 8 hours, a removal rate of 90% can be achieved if time is spent.

  Moreover, the reaction tank 7 of this embodiment has the nozzle mechanism 3 and the sewage inflow part 74 in the lower part, and has the gaseous-phase part 73 and the treated water discharge part 77 in the upper part. Thereby, the ozone bubbles can be advanced upward from the lower part of the reaction tank 7 without performing any special treatment, so that the sewage treatment can be made efficient. Further, by disposing the treated water discharge part 77 at the upper part, the treated water can be naturally discharged to the outside of the reaction tank 7 due to overflow, and a structure for discharging the treated water can be realized simply.

  Moreover, the ozone supply apparatus 2 of this embodiment can supply ozone with an ozone concentration of 15 ppm or more, and the nozzle mechanism 3 can generate ozone bubbles having a diameter of 10 μm or less. In general, as described in the 2009 report on technical evaluation of ozone treatment technology issued by the Japan Sewerage Corporation, the ozone concentration of treated water after biological treatment represented by the activated sludge method is It is known to apply about 5 to 15 ppm of ozone. In this embodiment, since ozone directly acts on the raw water, it is supplied from the ozone supply device 2 to the reaction tank 7 at a high concentration of 15 ppm or more via the nozzle mechanism 3 provided at the lower part of the reaction tank 7. Thus, wastewater treatment can be performed in a short time.

  Moreover, since the ozone decomposition catalyst part 75 is arrange | positioned at the pipe line extension part 110 following the gaseous-phase part 73 of the reaction tank upper part 72, the situation where residual ozone is discharged | emitted as it is outside can be prevented.

  The temporary toilet unit 100 includes a residual ozone concentration measurement sensor (ozone concentration measurement unit) 22 that is disposed in front of the ozone decomposition catalyst unit 75 and measures the ozone concentration, and the ozone measured by the residual ozone concentration measurement sensor 22. The ozone supply amount is controlled in accordance with the concentration value. As a result, the ozone supply amount is adjusted based on the amount fed into the ozone decomposition catalyst unit 75 or the residual ozone concentration after being processed by the ozone decomposition catalyst unit 75, so that the ozone of the exhaust gas discharged to the outside of the reaction tank 7 The concentration can be precisely controlled according to the actual situation.

  The temporary toilet unit 100 also includes a flow rate variable valve 6 arranged in a path for supplying oxygen to the ozone supply device 2, and the ozone supply amount is controlled by adjusting the opening degree of the flow rate variable valve 6. It is possible to realize a configuration capable of precisely controlling the ozone supply amount by a simple process of adjusting the opening degree of the variable flow valve 6.

  Further, the raw water supply line is configured to be provided with a filter 17 capable of removing solids of 10 μm or more. As a result, solids of 10 μm or more are removed from the raw water, so that it is possible to effectively prevent clogging in the portion where the raw water flows or the portion where ozone is generated.

The temporary toilet unit 100 includes a raw water sensor 31 as a raw water quality detector that measures the quality of raw water and a treated water sensor 32 as a treated water quality detector that measures the quality of treated water. According to the numerical value of the water quality of the sensor 32, at least one of the ozone concentration, the ozone flow rate, and the pump water supply amount is adjusted. As a result, the amount of ozone can be appropriately controlled according to the actual water quality, and a more efficient operation is possible.
In addition, it is not restricted to the structure using both the detected value of the raw | natural water sensor 31 and the treated water sensor 32, ozone concentration, ozone based on either one of the detected value of the raw | natural water sensor 31 and the detected value of the treated water sensor 32 A configuration for adjusting at least one of the flow rate and the pumping water amount and a sensor for measuring the water quality inside the reaction tank 7 are arranged as a reaction tank water quality detection unit, and the ozone concentration and the ozone flow rate based on the water quality inside the reaction tank 7 In addition, the configuration for adjusting at least one of the pumping water amount and the configuration for combining the detection result of the water quality of the reaction tank 7 with the detection result of the water quality of the raw water or the detection result of the quality of the treated water are appropriately changed according to circumstances. be able to.

  Further, the treated water is treated by the reverse osmosis filtration membrane 23 or the washing water filtration unit 105 having an operation pressure of 1 MPa or less. As a result, the quality of the treated water can be further improved, so that the range of application of the treated water, such as discharge to the outside of the system or use as toilet flushing water, can be expanded.

  The entire apparatus of the temporary toilet unit 100 is integrated, and has a shape and weight that can be loaded on a truck bed. The enlargement of the reaction tank 7 can be avoided by circulation processing or batch processing, and the temporary toilet unit 100 can be made compact.

  The temporary toilet unit 100 includes a temporary toilet, and is configured such that treated water from the treated water discharge unit 77 can be used for toilet cleaning of the temporary toilet 12. Thereby, since the toilet bowl washing water can be processed and reused, the temporary toilet 12 can be made into a flush toilet while maintaining portability.

  The temporary toilet unit 100 includes a raw water tank 16 that stores raw water to be sent to the reaction tank 7 and a sock filter 155 that filters raw water before being sent to the raw water tank 16. Thereby, since raw water can be sent to the reaction tank 7 from the raw water tank 16 in which the raw water from which the foreign matter has been removed by the sock filter 155 is stored, the raw water is supplied to the raw water tank 16 during a standby time during circulation processing or batch processing. Can be buffered.

  Next, structural examples of the reaction tank 7 and the nozzle mechanism 3 applied to the temporary toilet unit 100 of the first embodiment will be described with reference to FIGS. 3 and 4. FIG. 3 is a view showing the structure of the reaction tank 7 used in the temporary toilet unit 100 of the present embodiment. FIG. 4 is a structural diagram of a temporary toilet unit 100 according to an embodiment of the present invention.

<Example of reaction tank structure>
FIG. 3 shows a structural example of the reaction tank 7 provided in the temporary toilet unit 100 as the sewage treatment apparatus of the present invention. The reaction tank 7 shown in FIG. 3 is made of a material resistant to ozone, such as stainless steel, and has a capacity of 0.06 to 1.0 m ³ . As shown in FIG. 3, the central portion of the reaction vessel 7 is formed in a cylindrical shape having a diameter of 0.4 m and a height of 0.7 m. Further, two observation windows 78 are provided on the peripheral surface of the cylinder at the center of the reaction tank 7 so that the state inside the reaction tank 7 can be visually confirmed. The diameter of the observation window 78 is set to 0.3 m. Further, the lower side and the upper side of the central portion of the reaction tank 7 are both substantially conical cone shapes. Further, it is an effective means to provide a communication pipe 710 connected to the outside in the vicinity of the gas phase portion 73 so that the water level can be monitored from the outside. A sample cock 28 is disposed in the pipe line extension 110.

<Example structure of nozzle mechanism>
By the way, from the viewpoint of safety, economy, and processing performance, the nozzle diameter is selected that is economical at the current technical level, but it turns out that the smaller the bubble diameter, the better the processing performance. ing. If the ozone bubble diameter is 10 microns or less, it is advantageous compared to the prior art, but by using a 1 micron nozzle and a 10 micron nozzle together, even if the 1 micron nozzle is clogged, the 10 micron nozzle is clogged. Since it has been proved by experiments that it takes time to complete the process, it is possible to further stabilize the processing by preparing a plurality of different diameters. Combinations having a plurality of hole diameters of 10 microns or less are also possible. For example, 5 holes with a pore size of 10 microns and 5 holes with a pore size of 3 microns can be combined as appropriate according to the liquid properties and target water quality to prevent clogging and to cope with performance variations. become. Further, the mounting direction of the nozzle mechanism 3 can also be a combination of the horizontal direction and the vertical direction, thereby preventing clogging and generating uniform bubbles.

  FIG. 5 is a structural diagram of a nozzle mechanism used in the temporary toilet unit 100 according to an embodiment of the present invention. The nozzle mechanism 3 illustrated in FIG. 5 includes a ceramic diffuser tube 310 (diameter 20 mm, length 150 mm) and two pore size 10 micron specifications in the horizontal direction, an SPG diffuser tube 320 (diameter 10 mm length 200 mm), Six 6-micron pore diameter specifications are installed vertically upward. By setting the ozone bubbles so that the water depth is slightly different for each nozzle for each nozzle, the ozone discharge pressure when discharging into the water changes, which is effective in preventing clogging.

  The nozzle mechanism 3 of this structural example is configured by combining a plurality of ceramic nozzles and SPG (Shirasu Porous Glass) film nozzles. By using the nozzle made of ceramic and the nozzle made of SPG film in combination, it is possible to effectively cope with blockage caused by dirt due to the difference in wettability and surface energy of the film surface. That is, the performance can be further stabilized by using the ceramic nozzle and the SPG film nozzle in combination.

  Moreover, in this structural example, the size of the ozone bubbles sent out from the nozzle mechanism 3 and the direction in which the ozone bubbles are discharged can be made different, and the ozone bubbles are agitated inside the reaction tank 7 to achieve a higher cleaning performance. Can be earned.

<Portable temporary toilet>
As shown in FIG. 4, portable temporary toilets with dimensions and weight capable of traveling on public roads in accordance with the Road Traffic Law with the peripheral equipment of the reaction tank 7 integrated as much as possible and loaded on a truck bed. By using the unit, it is possible to minimize the assembly work after the movement, and the convenience is enhanced. This unit also includes a control panel 27 in which the controller 90 is built. The temporary unit shown in the embodiment is designed to be able to be loaded on a 4-ton truck bed.

<Overall Configuration of Temporary Toilet Unit of Second Embodiment>
FIG. 6 is a flowchart of the temporary toilet unit 200 according to the second embodiment. In the following description, the same components as those in the above embodiment may be denoted by the same reference numerals and the description thereof may be omitted.

  In the second embodiment, the raw water pump 18 is a pump having a fine bubble supply turbo mechanism. This raw water pump 18 functions as a second ozone supply means in addition to the ozone supply device 2 as the first ozone supply means.

  The pump having the fine bubble supply turbo mechanism is a suction pump, and is a raw water pump 18 that transfers raw water from the raw water tank 16 to the reaction tank 7. In the second embodiment, an ozone supply pipe 211 is connected as a pipe for supplying ozone from the ozone supply device 2 to the raw water pump 18. Ozone is supplied from the ozone generator 5 (ozone supply device 2) to the raw water pump 18 through the ozone supply pipe 211. The raw water pump 18 is capable of generating nano-sized (several nanometers) bubbles therein, and is capable of realizing high-performance ozone oxidation treatment. For example, a Nikuni inverter-controlled vortex turbo mixer pump (KTM25ND15ZE), AC200V, 1.5 Kw can be used as the raw water pump 18 of the second embodiment.

  In the second embodiment, ozone bubbles supplied to the reaction tank 7 from the ozone supply device 2 as the first ozone supply means via the nozzle mechanism 3 are at a micro level, and cavitation sent from the raw water pump 18 to the reaction tank 7. The ozone bubbles using the water are at the nano level, and are configured to have different bubble sizes. Thus, the treatment of sewage with ozone bubbles can be performed more effectively by changing the sizes of the ozone bubbles.

  Further, in the ozone bubbles supplied from the ozone supply device 2, as shown in <Structure example of nozzle mechanism>, the size of the ozone bubbles is further improved by making the diameters that generate the ozone bubbles different. The cleaning effect can be further enhanced by ozone bubbles of various sizes. That is, by combining the nano level ozone bubbles by cavitation of the raw water pump 18 (vortex turbo mixer pump) and the micro level ozone bubbles of different diameters by the nozzle mechanism 3 (ceramic diffuser tube 310 and SPG diffuser tube 320). Further, the diversity of the size of the ozone bubbles is further ensured, and the cleaning effect of the sewage treatment can be further enhanced.

According to 2nd Embodiment described above, there exist the following effects.
The ozone supply means of the second embodiment includes an ozone supply device 2 as a first ozone supply means for supplying ozone bubbles to the reaction tank 7 and water flowing through the raw water supply line 181 on the upstream side of the reaction tank 7. And a raw water pump 18 as second ozone supply means for supplying ozone bubbles. Accordingly, it is possible to enhance the ozone oxidation action by receiving the supply of ozone from the ozone generator 5 (ozone supply device 2) to generate ultrafine bubbles (bubble diameter of 1 micron or less). Actually, the sewage supply amount was 1 to 15 L / min, and good results were obtained.

  Moreover, in 2nd Embodiment, the raw | natural water pump 18 as a 2nd supply means is a suction pump, and is comprised so that raw | natural water may be sent into the said reaction tank with an ozone bubble. Accordingly, ozone can be injected into the raw water before the reaction tank 7 and the raw water is sent into the reaction tank 7 together with ozone, so that the processing efficiency can be further improved.

  The raw water pump 18 has a fine bubble supply turbo mechanism. Thus, by using cavitation, nano-level ozone bubbles can be generated, and the ozone oxidation action can be further enhanced.

<Overall Configuration of Temporary Toilet Unit of Third Embodiment>
FIG. 7 is a flowchart of the temporary toilet unit 300 according to the third embodiment. The third embodiment is different from the above embodiment in that the raw water supplied to the reaction tank 7 is subjected to sewage treatment by batch processing.

  The temporary toilet unit 300 of the third embodiment stops the driving of the raw water pump 18 in a state where a predetermined amount of raw water is fed into the reaction tank 7 and starts supplying ozone by the ozone supply device 2. The supply of ozone by the ozone supply device 2 is continued until the sewage treatment is completed. The completion timing of batch processing can be determined based on time, water quality, residual ozone concentration, a combination thereof, or the like, as in <batch operation control> of the first embodiment. Also in the third embodiment, batch processing is performed while performing the <ozone supply amount control> described in the first embodiment. Thereby, even if it is a case where ozone is supplied for a certain period of time by batch processing, the situation where ozone is supplied excessively can be prevented reliably.

  When the batch processing is completed, the treated water is sent to the treated water tank 10 through the treated water pipe 309 communicating with the inside of the reaction tank 7. In this embodiment, treated water is sent to the treated water tank 10 using gravity. It is good also as a structure which arrange | positions an electromagnetic valve in the treated water piping 309, and opens and closes an electromagnetic valve by the control part 90. FIG. In addition, a pump is arrange | positioned as a structure which sends a treated water to the treated water tank 10, and the predetermined amount is sent to the treated water tank 10 using an overflow like the structure which pumps treated water using a pump, and 1st Embodiment. It can also be configured. The batch processing can avoid an increase in the size of the reaction tank 7, and the portability and compactness of the apparatus configuration can be realized.

<Whole structure of the sewage treatment apparatus of 4th Embodiment>
Next, the example which applied this invention other than a temporary toilet is demonstrated. FIG. 8 is a flowchart of the sewage treatment apparatus 500 according to an embodiment of the present invention. A sewage treatment apparatus 500 shown in FIG. 8 is for treating sewage other than a temporary toilet, for example, sewage such as a shower. The first embodiment is different from the first embodiment in that the configuration related to the toilet such as the temporary toilet 12 is omitted. The fourth embodiment is also configured so that the circulation processing operation and the batch processing can be executed. Note that only the circulation processing operation may be performed, or only batch processing may be performed. In any case, it is possible to realize a sewage treatment apparatus that can be made compact and has excellent portability.

  In this technology, it is desirable to operate at an ozone concentration of 15 to 80 ppm from the viewpoint of economy, safety and processing performance. However, if the economy and safety can be ensured, it is not always necessary to set an upper limit for ozone concentration. The higher the concentration, the shorter the processing time.

Each of the embodiments described above is a sewage treatment apparatus that can perform rated operation in a short time after installation, achieves a certain water quality standard, and has a function of purifying sewage with high efficiency. And as one Embodiment of this invention, it can also apply as a temporary toilet unit which enables the flush toilet which has the disinfection and deodorizing function by ozone water.
In the above-described embodiment, organic wastewater treatment centered on human waste has been described as an example of wastewater. However, the present invention is not limited to this, and the present invention is also applied to a wastewater treatment apparatus that treats wastewater of organic dyes. it can. For example, the sewage treatment apparatus of the present invention can be applied to decolorization by ozone oxidation, removal of BOD (BIOCHEMICAL OXYGEN DEMAND), COD (CHEMICAL OXYGEN DEMAND), and the like. Thus, this invention can process various sewage with high efficiency, and has industrial applicability.

Further, from the above embodiment, the following technical idea can be grasped at least in the temporary toilet unit.
(1) The temporary toilet unit has an ozone supply device that can supply ozone with an ozone concentration of 15 ppm or more, a nozzle mechanism that can generate ozone bubbles with a diameter of 10 μm or less, and a sewage inflow section at the bottom, and an atmosphere open section and treatment at the top. And a sealed reaction tank having a water discharge part.
(2) The configuration of (1) is characterized in that an ozone decomposition catalyst part and an ozone concentration measuring part are provided in a pipe extension part following the atmosphere opening part above the sealed reaction tank.
(3) In the configuration of (2), an ozone sensor that measures the ozone concentration is provided in front of the ozone decomposition catalyst unit, and the ozone supply amount is controlled in accordance with the value of the ozone concentration.
(4) In the configuration of (2) or (3), a flow rate variable valve is provided in a piping part for supplying oxygen to the ozone supply device, and an ozone sensor for measuring ozone concentration is provided in front of the ozone decomposition catalyst part, The flow rate variable valve is controlled to a predetermined opening degree according to the value of the ozone concentration in front of the ozone decomposition catalyst unit.
(5) In any one of the constitutions of (1) to (4), a filter capable of removing a solid matter of 10 μm or more is provided in a front piping path portion of the sewage inflow portion at the lower part of the sealed reaction tank. Features.
(6) In any one of the constitutions (1) to (5), sewage is supplied from a pump having a fine bubble supply turbo mechanism to the sewage inflow portion at the lower part of the sealed reaction tank.
(7) In any one of the constitutions (1) to (6), a treated water tank for storing treated water is provided after the treated water discharge part, and a part of the treated water is returned to the sealed reaction tank. It is possible to make it possible.
(8) In any configuration of (1) to (7), an instrument that can measure the quality of the raw water is provided in the piping path, and the ozone concentration, the ozone flow rate, and the pump water supply amount are controlled according to the water quality values. It is characterized by that.
(9) In any one of the constitutions (1) to (8), the treated water from the treated water discharge section can be used for toilet flushing of a temporary toilet.
(10) In any one of the constitutions (1) to (9), the treated water from the treated water discharge part is treated with a reverse osmosis filtration membrane having an operation pressure of 1 MPa or less.
(11) The structure according to any one of (1) to (10) is characterized in that the entire apparatus is integrated, and is configured to have a shape and weight that can be loaded on a truck bed, and is portable.

1 Residual ozone 2 Ozone supply device (ozone supply means)
3 Nozzle mechanism 310 Ceramic diffuser tube 320 SPG diffuser tube 4 Oxygen generator 5 Ozone generator 6 Flow rate variable valve 7 Reaction tank (closed reaction tank)
71 Reaction tank lower part 72 Reaction tank upper part 73 Gas phase part 74 Wastewater inflow part 75 Ozone decomposition catalyst part 76 Exhaust ozone concentration measurement sensor (ozone concentration measurement part)
77 Treated water discharge part 78 Peep window 79 Communication port 710 Communication pipe 8 Ozone fine bubbles 9 Treated water piping 10 Treated water tank (storage tank)
101 treated water pump 11 toilet flush pipe 12 temporary toilet 13 flush toilet 14 water tank 15 toilet pump 151 toilet pump piping 155 socks filter 16 raw water tank 17 filter 18 raw water pump (suction pump)
181 Raw water pump piping (raw water supply line)
19 Exhaust gas 20 Defoamer inlet 21 Input ozone concentration measurement sensor 22 Residual ozone concentration measurement sensor (ozone concentration measurement part)
23 Reverse Osmosis Filtration Membrane 24 Discharge Pump 25 Switching Valve 26 Discharge Water Pipe 27 Control Panel 28 Sampling Cock 29 Water Flow Meter 30 Toilet Washing Water Pipe 31 Raw Water Sensor (Water Quality Detection Unit)
32 Treated water sensor (water quality detector)
33 Circulation pump 100 Temporary toilet unit (sewage treatment equipment)

Claims (5)

A closed reactor,
A raw water supply line for supplying raw water to the reaction tank;
Ozone supply means for supplying ozone;
A nozzle mechanism that is disposed in the lower part of the reaction tank and sends ozone supplied from the ozone supply means to the reaction tank as ozone bubbles of a micro level or less,
The nozzle mechanism is
A horizontal air diffuser having pores and installed horizontally;
A vertical air diffuser having pores and installed vertically;
Is composed of
A sewage treatment apparatus in which an ozone discharge pressure when ozone bubbles are discharged into water changes for each horizontal diffusion tube by installing the plurality of horizontal diffusion tubes at different water depths . A closed reactor,
A raw water supply line for supplying raw water to the reaction tank;
Ozone supply means for supplying ozone;
A nozzle mechanism that is disposed in the lower part of the reaction tank and sends ozone supplied from the ozone supply means into the reaction tank as ozone bubbles of a micro level or less;
A raw water pump disposed in the raw water supply line and having a fine bubble supply turbo mechanism;
With
The nozzle mechanism is
A horizontal air diffuser having pores and installed horizontally;
A vertical air diffuser having pores and installed vertically;
Is composed of
The diameters of the pores of the horizontal diffusing tube and the vertical diffusing tube are different from each other,
Nano level ozone bubbles by cavitation of the raw water pump,
A sewage treatment apparatus in which the horizontal diffusing pipe and the micro-level ozone bubbles respectively generated from the pores having different diameters by the vertical diffusing pipe are combined . The sewage treatment apparatus according to claim 1 or 2 , wherein the raw water supplied to the reaction tank is organic wastewater mainly including human waste. 3. The sewage treatment apparatus according to claim 1, wherein the raw water supplied to the reaction tank is organic dye sewage. The sewage treatment apparatus according to any one of claims 1 to 4 , wherein the entire apparatus is integrated, and is configured to have a shape and weight that can be loaded on a truck bed.

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