JPH07155778A - Waste water purifying treatment device and method therefor - Google Patents

Abstract

PURPOSE:To provide a waste water purifying treatment device and a method therefor by which contaminated waste water can be purified in a short time and with good efficiency. CONSTITUTION:This waste water purifying treatment device is provided with an ozonizer 1, two purifying treatment tanks 2, an ozone transfer path 3 consisting of two of a transfer path for purifying treatment tank 31 and a transfer path for chamber 32, a waste water storage tank 4, a purified waste water relay tank 5, waste water transfer paths 61, 62, 63, and a control means for linking them to systematize the whole equipment. Ozone generated from the ozonizer 1 is selectively sent to the purifying treatment tanks 2 or respective chambers 7 by the control means through the transfer path for purifying treatment tank 31 or the transfer path for chamber 32, and waste water used for processing, etc., in the chamber is subjected to purifying treatment in the purifying treatment tanks 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in a wastewater purification treatment apparatus and a wastewater purification treatment method for purifying wastewater discharged from factories and the like.

[0002]

2. Description of the Related Art Wastewater discharged from factories and the like often contains substances harmful to the human body and gives off a strange odor.
If it is thrown away as it is, it could cause great damage to the surrounding residents. Therefore, conventionally, a method of once purifying the polluted waste water before flowing it is adopted.
In this conventional wastewater purification treatment method, for example, a plurality of treatment tanks are arranged in parallel, and wastewater is sequentially sent to these treatment tanks, and at the same time, air is sent into the wastewater sent to each treatment tank and chlorine or A neutralizing agent is added to neutralize the contaminated wastewater while precipitating harmful substances, removing the precipitates, and then discarding. However, according to such a method, waste water must be sequentially sent to a plurality of treatment tanks, and moreover, a considerable time is required to precipitate harmful substances, so that the treatment time becomes long. Also, depending on the degree of pollution of wastewater and the type of pollution, the purification efficiency is poor,
There is a problem that it may be difficult to purify until it becomes harmless to the human body.

[0003]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide a waste water purification treatment device capable of efficiently purifying contaminated waste water in a short time and It is to provide a wastewater purification treatment method.

[0004]

The present inventor has completed the present invention by paying attention to the fact that ozone is effective for sterilization and deodorization. The present invention solves the above problems by providing a wastewater purification treatment device having the following features. The wastewater purification treatment device of the present invention includes a purification treatment tank 2 and an ozone generator 1 that generates ozone. The septic tank 2 is capable of containing an appropriate amount of contaminated waste water. The ozone generator 1 has sending means 3 and 11 for sending the generated ozone into the waste water in the purification treatment tank 2. The wastewater can be purified by this ozone.

The present invention also solves the above problems by providing a wastewater purification treatment method having the following features. In the wastewater purification treatment method of the present invention, the polluted wastewater is stored in the purification treatment tank 2, and the ozone generated by the ozone generator 1 is sent into the purification treatment tank 2 to discharge the wastewater in the purification treatment tank 2. This is a method of purifying wastewater by passing ozone through it.

[0006]

Since the wastewater purification treatment apparatus of the present invention is provided with only the purification treatment tank 2 and the ozone generator 1, the entire apparatus is simplified and can be conveniently installed.

Further, in the wastewater purification treatment method of the present invention, it suffices to pass ozone into the wastewater in the purification treatment tank 2, and it is not necessary to add chlorine or a neutralizing agent together with air as in the conventional case. It can be done with a simple operation. Moreover, purification treatment can be performed efficiently in a short time as compared with the conventional treatment method.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a schematic explanatory diagram of a wastewater purification treatment apparatus according to an embodiment of the present invention.

The waste water purification treatment apparatus of this embodiment is installed and used in a processing factory for fishery processing, dyeing processing, etc. As shown in FIG. 1, an ozone generator for generating ozone. 1 and septic tank 2 for purifying wastewater
An ozone transfer path 3 for sending ozone to a predetermined place, a drainage storage tank 4 for collecting polluted wastewater, a purified drainage relay tank 5 for storing purified wastewater, and a drainage transfer path for transferring drainage. , And control means.

The ozone generator 1 is provided with a plate electrode and the like inside, and the air sent from the compressor 11 is passed through the plate electrode to generate ozone and release the generated ozone. As the ozone generator 1 in this embodiment, an ozone generator that can generate about 120 g of ozone per hour is used. The ozone generator 1
From the compressor to the compressor 11, the air dryer 12, the filter 13, the pressure reducing valve 14, the pressure switch 1
5 、 Regulator 16 etc. are attached, Compressor 1
The air pressure sent from No. 1 is sent to the ozone generator 1 while being adjusted to a state suitable for generating ozone.
The ozone generator 1 is not limited to the type that generates 120 g of ozone per hour, and can be appropriately changed according to the amount of drainage.

The purification treatment tank 2 is composed of two first tanks 2a on the left side in the figure and a second tank 2b on the right side. Each of them is made of the same material, is composed of a cylindrical tank, and has a capacity capable of receiving drainage of about 10 tons inside. Further, a depth detecting device 21 is installed inside so that when a predetermined amount of waste water enters the inside, it can be detected.

The ozone transfer path 3 is a purification processing tank transfer path 31 for transferring ozone from the ozone generator 1 to the purification processing tank 2.
And the ozone generator 1 to a plurality of rooms 7 such as a factory processing room.
.. and a room-use transfer path 32 for transferring to 7. These transfer paths 31 and 32 are connected to the solenoid valve 33.
The ozone generator 1 can selectively switch ozone from the ozone generator 1 by switching a and 33a.
In addition, two electromagnetic valves 33a and 33a are provided in each of the septic tank transfer path 31 and the room transfer path 32.
One is reserved and one by one is enough.

The purification treatment tank transfer path 31 is formed by the first tank 2
a first tank transfer path 31a for transferring to the a tank and a second tank transfer path 31b for transferring to the second tank 2b, and the first tank 2a or the second tank via the solenoid valves 33b and 33b. Ozone is selectively transferred to 2b. Further, ozone discharge holes 34, 34 capable of bubbling ozone are attached to the end portions of the respective transfer paths 31a, 31b, and the ozone discharge holes 34, 34 are attached to the first tank 2a and the second tank 2b. Is disposed at the inner lower end of each of the. still,
The first tank transfer path 31a and the second tank 2b are also provided with two electromagnetic valves 33b and 33b, respectively. One of them is a spare, and one of them is sufficient.

On the other hand, the room transfer path 32 transfers ozone simultaneously or selectively to each room 7 ... 7 such as a processing room, a product room, a refrigerating room, etc. The air is sterilized, deodorized, etc., and ozone is passed through the water used in the room 7, so that the water that has passed through ozone can be used for processing.

The drainage storage tank 4 is a tank for temporarily storing the drainage used for processing or the like. On the other hand, the purification-processed wastewater relay tank 5 is a tank for temporarily storing the wastewater purified by the purification treatment tank 2.

The drainage transfer path is for transferring drainage, and is made of piping. This pipe includes a drainage storage tank pipe 61, a purification treatment tank pipe 62, and a purification treatment drainage relay tank pipe 63.

The drainage storage tank pipe 61 is connected to each of the chambers 7 ... 7 such as a processing room and the drainage storage tank 4, and drains the wastewater used in the processing room and contaminated to the drainage storage tank 4. The purification treatment tank pipe 62 includes a waste water storage tank 4 and two purification treatment tanks 2.
a and 2b, and a pump 8 between them.
a and 8b are installed, and the waste water stored in the waste water storage tank 4 is made to flow to the respective purification treatment tanks 2a and 2b by the pumps 8a and 8b. In addition, the purified wastewater relay tank pipe 63 is connected to the purification treatment tank 2 and the purified wastewater relay tank 5, and an automatic opening / closing valve 63 is provided at the end of the purification treatment tank 2 side.
a and 63b are attached, and valves 63a and 63 for automatic opening / closing are provided.
When b is opened, the washing-treated wastewater that has been washed in the purification treatment tank 2 flows to the purification-treated wastewater relay tank 5.

The control means is for automatically controlling and systematizing the entire wastewater purification treatment apparatus, and includes the ozone generator 1, the purification treatment tank 2, the ozone transfer path 3, the wastewater storage tank 4, and the purification. By electrically and mechanically connecting the treated wastewater relay tank 5 and the wastewater transfer path, the whole is interlocked, and the control unit 10 is operated to automatically control the entire apparatus to form a system.

Next, the operation of these devices will be described. First, when ozone is released from the ozone generator 1 by the operation of the controller 10, the ozone is transferred to the first tank transfer path 31a.
To the first tank 2a from the first tank transfer path 31a. Further, when ozone starts to flow into the first tank 2a, the pump 8a of the purification treatment tank pipe 62 connected to the first tank 2a operates in association with it, and the waste water accumulated in the waste water storage tank 4 is purified. First from the tank piping 62
It is poured into the tank 2a. At that time, for example, the first tank 2a
If the waste water is put in advance and ozone is flowed to the stored waste water, the ozone generator 1 is overloaded due to the large amount of waste water, which causes trouble to the ozone generator 1. This can be prevented. And
When a predetermined amount of waste water is collected in the first tank 2a, the depth detection device 21 detects this and stops the pump 8a. Then, after a lapse of a predetermined time, the automatic opening / closing valve 63a opens,
The purified wastewater in the first tank 2a is flowed to the purified wastewater relay tank 5.

Further, when the automatic opening / closing valve 63a is opened, at the same time, the ozone sent to the first tank transfer path 31a side is switched to the second tank transfer path 31b side by the solenoid valves 33b and 33b, and the ozone is transferred. Is sent from the second tank transfer path 31b to the second tank 2b. Also, in conjunction with this, a septic tank pipe 6 connected to the second tank 2b
The second pump 8b operates, the drainage of the drainage storage tank 4 is caused to flow into the second tank 2b, the drainage is purified in the same manner as the first tank 2a, and when the purification is completed, the automatic opening / closing valve 63b is turned on. It opens and is flushed to the purified wastewater relay tank 5.

Here, a purification treatment test in the tank 2 was conducted, and the inspection results are shown in Tables 1 to 4 below. Table 1 shows the drainage when processing marine products (octopus) using ordinary water in a fisheries processing plant, and Table 2 shows the drainage in the state shown in Table 1. In addition, 120 g / hour ozone was passed for 3.5 hours, and each item was measured. Also, Table 3 shows
Drainage water when dyeing and processing using normal water in a dyeing factory is measured for each item shown in Table 3, and Table 4 shows that 120 g / hour of ozone is added to the wastewater in the state shown in Table 3. It is measured for each item after 1 hour.

[0022]

[Table 1]

[0023]

[Table 2]

As shown in Table 2, the measured value for each item was significantly reduced in 3.5 hours as compared with Table 1, and purification treatment was performed to the extent that it could be reused.

[0025]

[Table 3]

[0026]

[Table 4]

As shown in Table 4, the measured values for each item decreased in 1 hour as compared with Table 3, and the purification treatment was performed to such an extent that it could be discarded as it was.

Next, when the cleaning of the second tank 2b is completed and the automatic opening / closing valve 63b is opened, the solenoid valves 33a, 33a are operated in conjunction with this, and ozone is transferred from the cleaning treatment tank transfer path 31 to the room. The transfer path 32 for the room is switched to the transfer path 32 for room, and the feeding to the transfer path 31 for the septic tank is stopped.
Sent to the side. Further, the ozone sent to each of the chambers 7 ... 7 such as the processing chamber is flowed into the water tank used in the chamber or the processing chamber. As a result, the air in the room can be purified, and at the time of processing work, it is possible to use water that has been sterilized and deodorized by ozone.

The water used for processing in the processing room or the like is stored in the drainage storage tank 4 through the drainage storage tank pipe 61. In addition, the stored waste water storage tank 4 is sent to the purification treatment tank 2 for purification treatment as described above.
At this time, since the water stored in the waste water storage tank 4 uses water that has been sterilized and deodorized with ozone in advance, the degree of pollution is lower than that of normal waste water processed without using ozone. There is. Therefore, the purification process in the purification treatment tank 2 can be efficiently performed.

By constructing the wastewater purification treatment system as described above, the wastewater can be easily and reliably treated in a short time. Further, for example, during the daytime when working in a processing room or the like, ozone from the ozone generator 1 is transferred to the room transfer path 3
2 to each room 7 ... 7, and at night, the room transfer path 32 is switched to the septic tank transfer path 31 to transfer from the first tank transfer path 31a to the first tank 2a and further to the second tank transfer. It is also possible to transfer ozone from the passage 31b to the second tank 2b, and by doing so, one ozone generator can be effectively used. Therefore, it is possible to minimize the use of an ozone generator, which is expensive to manufacture, and it is economically possible.

Although the purified wastewater sent to the purified wastewater relay tank 5 may be discarded as it is, the wastewater of the purified wastewater relay tank 5 is as shown in Table 2 above. It is purified to the extent that it can be reused sufficiently by passing 120 g / hour of ozone for about 3.5 hours. Therefore, a processing room that connects this purified wastewater relay tank 5 and each room 7 ... 7 such as a processing room. The equalizing pipe 64 may be provided and the drainage thereof may be sent to each room by a pump. If you do this,
Wastewater can be circulated and reused without being discarded, making it more economical. Further, in this case, the room transfer path 32 may be connected to the processing room piping 64.

Further, in the present embodiment, the ozone transfer path 3 is composed of the purifying tank transfer path 31 and the room transfer path 32, and the ozone can be switched appropriately by a solenoid valve. Although ozone can be selectively transferred from the generator 1 to the purification treatment tank 2 or each room 7 ... 7, this is not limited to this mode, and for example, the room transfer path 32.
Alternatively, the waste water may be sent only to the purification treatment tank 2 without being provided, and may be used only for purification treatment of waste water. In that case, an ozone generator may be installed separately from the ozone generator 1 used for the purification process, and ozone may be sent to each of the rooms 7 ... 7 from the ozone generator installed separately.

Further, when the amount of discharged water is large, one ozone generator 1 and the purification treatment tank 2 are connected as one set,
Plural sets of these may be installed to purify the wastewater of the purification tank 2. Further, the purification treatment tanks 2 connected to one ozone generator 1 are not limited to those provided in two as in the present embodiment, and one or three or more may be provided.

[0034]

As described above, the wastewater purifying apparatus of the present invention, as described in the embodiments, has a simplified overall structure and is convenient for installation.

Further, in the wastewater purification treatment method of the present invention, it suffices to send ozone to the purification treatment tank, and the operation can be simpler than the conventional one. Moreover, purification treatment can be performed efficiently in a short time as compared with the conventional treatment method. As described above, the present invention is
It is possible to provide a wastewater purification treatment apparatus and a wastewater purification treatment method capable of efficiently purifying contaminated wastewater in a short time.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram of a wastewater purification treatment apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 1 Ozone Generator 2 Purification Treatment Tank 2a First Tank 2b Second Tank 3 Ozone Transfer Channel 4 Wastewater Storage Tank 5 Purified Wastewater Relay Tank 7 Room 31 Purification Treatment Tank Transfer Path 32 Room Transport Path 61 Wastewater Storage Tank Piping 62 Pipe for purification treatment tank 63 Pipe for purification treatment drainage relay tank

Claims (2)

[Claims] 1. A purification treatment tank (2) and an ozone generator (1) for generating ozone, wherein the purification treatment tank (2) can store an appropriate amount of contaminated wastewater, Ozone generator (1) purifies ozone generated by purification tank (2)
A wastewater purification treatment apparatus having a feeding means (3) (11) for feeding the wastewater into the wastewater, and being capable of purifying the wastewater with this ozone. 2. Contaminated wastewater is stored in a purification treatment tank (2), and ozone generated by an ozone generator (1) is fed into the purification treatment tank (2) to obtain a purification treatment tank (2). A method for purifying wastewater, which comprises purifying the wastewater by passing ozone into the wastewater.