JPH10192622A - Waste liquid treatment device for paint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize smooth filtration and dilution processes with a small amount of water energy by forming a device of an aspirator for vacuum filtration and a function to dilute a filtrate with a water used for the aspirator, in the waste liquid treatment device designed for filtering a waste liquid such as a paint and purifying water. SOLUTION: In institutions such as a school, a waste liquid of paint is stored in a waste paint liquid tank 1 and a neutralizer for the waste liquid is added, and further, the mixture is stirred using a stirrer 11. Next, a waste supernatant supply aperture 12a and a waste sedimentation liquid supply aperture 12b on the tank 1 are set in the open state using an ON-OFF valve 13, and the waste paint liquid is caused to drop into a filtration tank 2 through a disperser 30, and further, the filtrate is stored in a filtrate storage tank 3. In this case, a tap water is allowed to flow into the filtrate storage tank 3 through the water flow inlet of an aspirator 17, and the internal pressure of the storage tank 3 is set in the vacuum state to the filtration tank 2 by sucking the air present in the filtrate storage tank 3 through a liquid drain aperture 19 for vacuuming. Thus, the waste paint liquid is vacuum-filtered. The tap water used for the aspirator 17 is drained from a water drain aperture and the filtrate is diluted with the tap water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating a waste liquid such as paint, and more particularly, to a waste liquid such as a paint obtained by washing a watercolor paint (paint dispersed in water) at a school or the like from a paint palette. The present invention relates to an apparatus for treating waste liquid such as paints for filtering and purifying water.

[0002]

2. Description of the Related Art Since paint contains heavy metals, it is necessary to take measures such as filtration before discharging the paint waste liquid. A waste liquid treatment device containing heavy metals such as paints usually has a waste liquid tank, a waste liquid reaction tank, a waste liquid filtration tank, and a neutralization tank, and the neutralization agent is added to the waste liquid in the waste liquid reaction tank.
After mixing the flocculant and the filter aid and reacting by stirring (jet stirring, air stirring), the waste liquid is filtered through a filtration tank,
In addition, the filtrate is allowed to flow into a neutralization tank, and a neutralizing agent such as an acid is mixed into the filtrate to neutralize the filtrate.

[0003] By the way, such watercolor paints are small,
Although small-scale usage forms such as junior high schools occupy a large proportion, schools and the like do not have such waste liquid treatment devices, and most of them are discharged as they are. However, from the viewpoint of living environment, even educational institutions such as schools need to install such a wastewater treatment device for paint. This means that in school education, one can instill the idea of properly treating the waste that he has produced.

[0004]

However, in the case of the above-mentioned waste liquid treatment apparatus, there are the following problems. The device becomes large-sized and is not suitable for treating a small amount of waste liquid. A separate dilution tank is required to dilute the filtrate. It takes time to replace the filter medium (filter medium). Therefore,
It is not easy for lower grade students such as elementary school students to use. There is a problem in that the use in schools is limited.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object the purpose of the present invention is to provide a simple structure and a small amount of waste liquid such as paint which can treat a small amount of waste liquid such as paint. An object of the present invention is to provide a processing device. Another object is to provide an apparatus for treating waste liquid such as paints that can be used as teaching materials.

[0006]

According to a first aspect of the present invention, there is provided an apparatus for treating a waste liquid such as paint, which filters a waste liquid such as a paint waste liquid in the tank. Filtration tank, a filtrate storage tank for storing the filtrate filtered in the filtration tank, a storage tank decompression unit provided with an aspirator for reducing the pressure in the storage tank with respect to the inside of the filtration tank, and the filtrate A filtrate diluting unit for diluting
The tank has a waste liquid supply port for supplying waste liquid in the tank to the filtration tank, and the filtration tank has a replaceable filter medium,
The filtrate storage tank has a filtrate discharge port for discharging the filtrate, and a decompression fluid discharge port connected to a fluid suction port of the aspirator, and connects the filtrate discharge port to the filtrate dilution unit. The filtrate diluting section dilutes the filtrate using water of the aspirator.

According to a second aspect of the present invention, there is provided an apparatus for treating a waste liquid such as a paint, a tank, a filter tank for filtering waste liquid such as a paint in the tank, a filtrate storage tank for storing the filtrate filtered by the filter tank, The storage tank has a decompression unit provided with an aspirator for depressurizing the inside of the filtration tank with respect to the inside of the filtration tank, and a filtrate dilution unit provided with an aspirator for diluting the filtrate, and the tank is provided in the tank. A wastewater supply port for supplying wastewater to the filtration tank, the filtration tank has an exchangeable filter medium, the filtrate storage tank has a filtrate discharge port for discharging the filtrate, and the inside of the storage tank. It has a decompression fluid outlet connected to the fluid inlet of the aspirator of the decompression section, and the filtrate outlet is connected to the fluid inlet of the aspirator of the filtrate dilution section.

According to a third aspect of the present invention, in the apparatus for treating a waste liquid such as a paint, the filtrate diluting section according to the first aspect of the present invention further comprises: A filtrate dilution tank provided with a supply port and a filtrate supply port through which the filtrate flows is provided, and the filtrate is diluted with water from the aspirator.

In a fourth aspect of the present invention, in the apparatus for treating a waste liquid such as a paint, the depressurizing aspirator and the diluting aspirator are a depressurizing / diluting aspirator, and the depressurizing aspirator is provided at a fluid inlet of the aspirator. A fluid outlet and the filtrate outlet are switchably connected to each other,
The aspirator is characterized by performing both reduced pressure in the filtrate storage tank and dilution of the filtrate. According to a fifth aspect of the present invention, there is provided a waste liquid treatment apparatus for paints and the like according to the first to fourth aspects, wherein the filtration tank is arranged to be rotatable in a horizontal direction with respect to the filtrate storage tank. I do.

The waste liquid treatment apparatus for paints and the like according to claim 6 is the invention according to claims 1 to 5, wherein the filtrate storage tank is:
It has a color detection unit for detecting the color of the filtrate in the storage tank, and a color adsorption unit for adsorbing the color in the filtrate at a stage subsequent to the filtrate dilution unit. Features. The apparatus for treating a waste liquid such as a paint according to claim 7 is the above-described claim 1 to 6.
In the invention, the tank, a filtration tank for filtering waste liquid in the tank, and a filtrate storage tank for storing the filtrate filtered in the filtration tank, each provided with a viewing window for internal observation. And

Here, the "paint" means a paint which can be dispersed in water. In the filter tank, filter paper or other filter material is used as the filter material. Also,
It is preferable to use tap water for the aspirator. Depending on the flow rate of tap water, the aspirator can also function as a water jet pump. As the color adsorption section, an adsorption tower filled with activated carbon or another adsorbent can be used, and the color tower is usually transferred to this adsorption tower using a pump. Further, the waste liquid supply port preferably has a supernatant waste liquid supply port for supplying the supernatant waste liquid of the tank to the filtration tank and a precipitation waste liquid supply port for supplying the precipitation waste liquid in the tank to the filtration tank. Thereby, smooth filtration can be performed.

The waste liquid treating apparatus for paints and the like according to the present invention comprises, for example, putting paint waste liquid obtained by washing a pallet with paint into a tank containing waste liquid such as paint waste liquid, and adding a neutralizing agent to the paint waste liquid. After adding a flocculant and a filter aid, stirring, reacting, and allowing the mixture to stand, the waste liquid supply port (supernatant waste liquid supply port and / or precipitation waste liquid supply port) of the tank is opened, and the paint waste liquid (top (Clarified waste liquid and / or sedimentation waste liquid) is discharged and supplied to a filtration tank arranged at a lower part of the tank, and filtered in the filtration tank, and the filtrate is stored in a filtrate storage tank. Here, when filtering the waste liquid, the aspirator is operated, that is, the tap water is used to flow the tap water to the aspirator, and when the decompression fluid discharge port formed in the filtrate storage tank is opened, the filtration is performed. The filtration is performed while the internal pressure of the liquid storage tank is reduced in pressure with respect to the filtration tank. Thus, a waste liquid such as a paint waste liquid can be filtered under reduced pressure in a simple form. The filtrate obtained by the reduced pressure filtration is stored in a filtrate storage tank. After a predetermined amount of the filtrate is collected, the pressure reducing fluid outlet is closed, and the filtrate is passed through the filtrate outlet to a filtrate diluting part. And diluted with tap water used in the aspirator. Alternatively, dilution is performed with an aspirator. If the diluted filtrate has a color, it is sent to a color adsorption section to remove the color, and if the color is colorless, the filtrate is usually discharged without passing through the color adsorption section. Also,
When the filtrate diluting section is composed of a dilution aspirator, the filtrate is suctioned into the aspirator by flowing tap water since the filtrate outlet and the fluid inlet of the aspirator are connected. Diluted with tap water used for aspirator. Thus, the paint waste liquid treatment apparatus of the present invention can easily treat waste liquid such as paint waste liquid.

[0013]

As is apparent from the above description, according to the apparatus for treating a waste liquid such as a paint according to the first aspect of the present invention, the filtrate is subjected to reduced pressure filtration using an aspirator and the filtrate used for the water used for the aspirator. Since the diluent is used, filtration and dilution can be smoothly performed with a small amount of water energy, and the configuration can be simplified. According to the waste liquid treatment apparatus such as the paint of claim 2, since the reduced pressure filtration and the filtrate dilution are each performed using the aspirator, the pressure in the filtrate storage tank can be easily reduced with little energy and the filtrate can be smoothly removed. It has the effect of being able to be dispersed and diluted.

According to the apparatus for treating a waste liquid such as paint of claim 3, the water used for the depressurizing aspirator in the filtrate storage tank is put into the filtrate diluting section, and the filtrate is diluted with this water. In addition to the effects of the first aspect of the invention, there is an effect that the water can be used effectively. Further, according to the waste liquid treatment apparatus for paints and the like of claim 4, since the aspirator of the pressure reducing section in the filtrate storage tank and the aspirator of the filtrate dilution section are also used, the effect of claim 2 is added. This has the effect that the configuration can be further simplified.

According to the apparatus for treating a waste liquid such as paint of claim 5, the filter tank is rotatably arranged in the horizontal direction with respect to the filtrate storage tank. In addition to the effect, there is an effect that the replacement of the filter medium can be performed smoothly and easily. According to the waste liquid treatment device such as paint of claim 6, the filtrate storage tank has a color detection unit for detecting the color of the filtrate in the storage tank,
Further, since a color adsorbing section for adsorbing the color in the filtrate is connected to the subsequent stage of the filtrate diluting section, in addition to the effects of claims 1 to 5, the waste liquid treatment can be performed better. Has an effect. Further, according to the waste liquid treatment device for paints and the like according to claim 7, the tank, a filtration tank for filtering waste liquid in the tank, and a filtrate storage tank for storing the filtrate filtered by the filtration tank are respectively provided inside. Since the observation viewing window is provided, in addition to the effects of the above-described claims 1 to 6, there is an effect that the state of the internal paint waste liquid treatment can be observed and that it can be effectively used as a teaching material.

[0016]

Preferred embodiments of the present invention will be described below with reference to the drawings.
1 to 3 show an embodiment of the present invention. FIG. 1 is a schematic front view, FIG. 2 is a schematic side view, and FIG. 3 is a plan view.

The waste liquid treatment apparatus according to the present embodiment is a treatment apparatus for paint waste liquid. As shown in FIGS. 1 to 3, the waste liquid treatment apparatus includes a paint waste liquid tank 1, a filtration tank 2, and a filtration storage tank 3. , Comprising a storage tank decompression unit 4, a filtrate dilution unit 5, and a color adsorption unit 6. Here, the paint waste liquid tank 1 is a tank for mixing and stirring a neutralizing agent or the like with the paint waste liquid, the filtration tank 2 is a tank for filtering the paint waste liquid in the paint waste liquid tank 1, and the filtrate storage tank 3 is This is a tank for storing the filtrate obtained by vacuum filtration in the filtration tank 2.
Is a part for reducing the pressure of the filtrate storage tank 3 with respect to the filtration tank 2, a filtrate dilution part 5 is a part for diluting the filtrate, and a color adsorption part 6 is a colored filtrate. This is a part for adsorbing the color from.

The paint waste liquid tank 1 is fixed to a frame 8 erected on a trolley 7, and a charging section 9 for charging the paint waste liquid, a neutralizing agent, a coagulant, and a filter aid at the top of the tank. A viewing window 10 for observing the inside around the tank 1, a stirrer 11 for stirring the paint waste liquid in the tank 1, and supplying (discharging) the mixed paint waste liquid to the filtration tank 2. Paint waste liquid supply port 12
Having. The paint waste liquid supply port 12 is opened upward in the tank 1, and a supernatant waste liquid supply port 12 a for taking out the supernatant waste liquid of the paint waste liquid and supplying the waste liquid to the filtration tank 2, and a funnel-shaped lower part of the tank 1. Has a precipitation waste liquid supply port 12b for supplying the precipitation waste liquid to the filtration tank 2. Each of the supply ports 12a and 12b has an opening / closing valve 13 respectively.
Is provided so that the supply amount and supply state of the supernatant waste liquid and / or the precipitation waste liquid to the filtration tank 2 can be adjusted. In addition, a disperser (diffuser) 30 is attached to the lower end of the paint waste liquid from both supply ports 12a and 12b so that the waste liquid falls uniformly into the filtration tank 2.

The filtration tank 2 is attached to the frame 8 so as to be freely rotatable horizontally, and a filter body (filter plate) 14 is detachably attached to the lower part of the tank. The filter body 14 is sandwiched and held by a holding plate 15 having a hole, and the end of the filter body 14 is detachably attached to a split band 16 via a packing made of silicon. That is, the filtration tank 2 has a lower part placed on the filtrate storage tank 3 and is mounted in a cantilevered state with respect to one of the frames 8, and the filtrate 8 is used as a guide rod (support shaft). The storage tank 3 is configured to be horizontally swingable. Here, as the filter body 14, filter paper having a small mesh is used. Thus, filtration tank 2
Are horizontally rotatable, so that the filter body 14 can be easily replaced.

The filtrate storage tank 3 is a tank for storing the filtrate of the paint waste liquid filtered in the filter tank 2, and the peripheral wall of the tank 3 sucks the fluid of the aspirator 17 constituting the storage tank decompression unit 4. Fluid outlet 19 for depressurization connected to port 18
A filtrate outlet 20 for discharging the filtrate and supplying it to the filtrate diluting unit 5 is provided at the lower part of the tank 3. The decompression section 4 in the storage tank is provided with the filtrate storage tank 3.
This is a part for reducing the pressure of the inside of the filtration tank 2 with respect to the filtration tank 2 and filtering the paint waste liquid under reduced pressure, and is constituted by an aspirator (water flow pump) 17. The aspirator 17 is an aspirator that sucks a fluid by a general ejector action, and includes a water inlet 21, a fluid inlet 18, and a water outlet 22. Here, as water,
We use tap water. Then, with the flow rate of the tap water, the air in the filtrate storage tank 3 can be evacuated from the decompression fluid discharge port 19 to reduce the pressure. Here, a plurality of pressure reducing fluid discharge ports 19 are attached. The water outlet 22 is connected to the filtrate dilution unit 5. An opening / closing valve 23 is provided at each of the decompression fluid outlet 19 and the filtrate outlet 20.

The filtrate diluting section 5 comprises a diluting tank 24 for diluting the filtrate. The diluting tank 24 has a filtrate supply port 25 for supplying a filtrate from a filtrate discharge port 20 and an aspirator 17. A diluting liquid supply port 26 for supplying water used for depressurization from a water discharge port 22 of the first embodiment, and a diluted filtrate outlet 27 for supplying a diluted filtrate to the color adsorption section 6.
Is provided. Thereby, the water from the aspirator 17 used for the depressurization can be effectively used for diluting the filtrate. The color adsorption section 6 includes an adsorption tower for adsorbing / removing the color of the diluted filtrate when the diluted filtrate is colored. And it consists of dischargeable through this adsorption tower. In addition, the observation viewing window 10 is, in addition to the paint waste liquid tank 1,
The filtration tank 2, the filtration storage tank 3, the decompression unit 4 in the storage tank, the filtrate dilution unit 5, and the color adsorption unit 6 are similarly provided. That is, each is provided with a window through which the internal state can be observed or inspected from outside. In addition, this viewing window 10
Are not absolutely necessary for all the parts 1 to 6, and are provided in the paint waste liquid tank 1, the filtration tank 2, the filtration storage tank 3, and the decompression unit 4 in the storage tank which need to be observed.

The paint waste liquid treatment apparatus of the present embodiment can be used as a treatment apparatus for paint waste liquid generated when a pallet using paint is washed in a school or the like. The method of use will be described. First, the paint waste liquid is put into the paint waste liquid tank 1 and a neutralizing agent, a flocculant, and a filter aid for the paint waste liquid are added, and then the stirrer 11 is operated to stir. Let react and let stand. Next, the supernatant waste liquid supply port 12a of the paint waste liquid tank 1
And the settling waste liquid supply port 12b is opened by the open / close valve 13, and the paint waste liquid (supernatant waste liquid and / or sediment waste liquid) is dispersed in the filter tank 2 disposed at the lower part of the paint waste liquid tank 1 by the disperser 30. The filtrate falls in a dispersed state through the filter tank 2 and is filtered in the filtration tank 2, and the filtrate is stored in the filtrate storage tank 3.
Here, the filtration of the supernatant waste liquid and the precipitation waste liquid is performed by first filtering the supernatant waste liquid and then filtering the precipitate waste liquid. However, even if it is the opposite, it may be made to discharge and fall at the same time, and may be filtered in the filtration tank 3. In addition, since the paint waste liquid is uniformly dropped and supplied to the filtration tank 2 by the disperser 30, the filter body 14 can be prevented from being broken and smooth filtration can be performed. Here, when filtering the paint waste liquid, the aspirator 17 constituting the depressurizing unit 4 in the storage tank is operated, that is, tap water is used to flow tap water from the water inlet 21 of the aspirator 17, and the open / close valve 23 is used. Is opened, the air in the filtrate storage tank 3 is sucked from the decompression fluid discharge port 19 formed in the filtrate storage tank 3 by the ejector action due to the flow rate of the tap water, and the filtrate storage tank 3 Is reduced in pressure with respect to the filtration tank 2, and the paint waste liquid can be filtered under reduced pressure.

The filtrate filtered under reduced pressure is stored in a filtrate storage tank 3. Next, when a predetermined amount of filtrate is accumulated, the on-off valve 23 is closed, the decompression fluid discharge port 19 is closed, and the filtrate is discharged from the filtrate discharge port 20. 24 through the filtrate supply port 25,
The tap water used in the aspirator 17 is supplied from the water drain port 22 through the diluting liquid supply port 26, and the filtrate is diluted with the tap water. Then, if the diluted filtrate has a color, it is sent to the color adsorbing section 6 to remove the color. If the color is colorless, it is usually discharged without passing through the color adsorbing section 6. Will do. This makes it possible to easily treat the paint waste liquid in schools and the like.

It should be noted that the present invention is not limited to the above-described embodiment, but includes a configuration that can be modified and implemented without departing from the gist of the present invention. For example, a form as shown in FIG. 4 may be used. FIG. 4 shows a configuration in which the filtrate diluting unit 5 is configured by an aspirator in the embodiment described above. Here, the aspirator is formed by the aspirator 17 constituting the depressurizing section 4 in the storage tank, and the filtrate outlet 20 of the filtrate storage tank 3 is connected to the fluid inlet 18 of the aspirator 17 via the switching valve 31. It consists of the configuration. That is, the air suction from the depressurizing fluid discharge port 19 of the filtrate storage tank 3 and the filtrate suction from the filtrate discharge port 20 are switched by the switching valve 31, and the pressure in the filtrate storage tank 3 is reduced by the aspirator 17. The dilution of the filtrate is intended to perform both functions. The aspirator of the filtrate diluting unit 5 may be constituted by an aspirator separate from the aspirator 17 constituting the decompression unit 4 in the storage tank.

In this embodiment, when the paint waste liquid is filtered under reduced pressure, the switching valve 31 is switched to open the pressure reducing fluid discharge port 19 and the fluid suction port 18 of the aspirator 17 (filtrate discharge port). 20 is closed) and filtration is performed. As a result, aspirator 1
When tap water is supplied to the nozzle 7, the air (fluid) in the filtrate storage tank 3 is discharged from the aspirator 17 through the decompression fluid discharge port 19.
And the inside of the filtrate storage tank 3 is put in a reduced pressure state, so that a smooth reduced pressure filtration can be performed. After performing this vacuum filtration,
When the switching valve 31 is switched so that the filtrate outlet 20 and the fluid inlet 18 of the aspirator 17 are opened (the pressure reducing fluid outlet 19 is closed) and tap water flows through the aspirator 17, the filtrate The filtrate is sucked into the aspirator 17 from the outlet 20 and dispersed and diluted with the tap water, so that a smooth diluted filtrate can be obtained. Here, the tap water used for the aspirator 17 at the time of filtration under reduced pressure is usually put in the paint waste liquid tank 1 to dilute the waste liquid.

Further, in the above-described embodiment, the case where paint waste liquid is used as the waste liquid to be treated has been described. However, the present invention can be used with other various kinds of waste liquid treatment apparatuses, for example, waste liquid containing heavy metals.

[Brief description of the drawings]

FIG. 1 is a schematic front view of an embodiment of the present invention.

FIG. 2 is a schematic plan view.

FIG. 3 is a schematic side view.

FIG. 4 is a schematic side view of another embodiment of the present invention.

[Explanation of symbols]

1 ... Paint waste liquid tank, 2 ... Filter tank, 3 ...
Filtration storage tank, 4 ... decompression part in storage tank, 5 ... filtrate dilution part, 6 ... color adsorption part, 7 ... trolley, 8 ... frame, 9 ... input part, 10 ... observation window, 1
1 ... Stirrer, 12 ... Paint waste liquid supply port, 12a
... Supply waste liquid supply port, 12b ... Precipitation waste liquid supply port,
13 ... opening and closing valve, 14 ... filter body, 15 ...
Holding plate, 16: Split band, 17: Aspirator, 18: Fluid suction port of aspirator 7, 19
... Decompression fluid outlet, 20 ... Excess fluid outlet, 21
... water inlet of aspirator 17, 22 ... water outlet, 23a, 23b ... open / close valve, 24 ... dilution tank, 25 ... filtrate supply port, 26 ... dilution liquid supply Port, 27: diluted filtrate outlet, 30: disperser (diffuser), 31: switching valve

Claims (7)

[Claims] 1. A tank for storing a waste liquid such as a paint, a filtration tank for filtering the waste liquid in the tank, a filtrate storage tank for storing the filtrate filtered in the filtration tank, and a filter for filtering the waste liquid in the storage tank. A depressurizing section in the storage tank provided with an aspirator for depressurizing the inside of the tank, and a filtrate diluting section for diluting the filtrate, wherein the tank has a waste liquid supply port for supplying waste liquid in the tank to the filtration tank; The filtration tank has a replaceable filter medium, the filtrate storage tank has a filtrate discharge port for discharging the filtrate, and a decompression fluid discharge port connected to a fluid suction port of the aspirator. A wastewater treatment device for paints or the like, wherein the filtrate outlet is connected to the filtrate dilution part, and the filtrate dilution part dilutes the filtrate using water of the aspirator. . 2. A tank for storing a waste liquid such as a paint, a filtration tank for filtering the waste liquid in the tank, a filtrate storage tank for storing the filtrate filtered in the filtration tank, and a filter for filtering the waste liquid in the storage tank. A depressurizing section in the storage tank having an aspirator for depressurizing the inside of the tank, and a filtrate diluting section having an aspirator for diluting the filtrate, wherein the tank is provided with a paint waste liquid in the tank. A wastewater supply port for supplying, the filtration tank has an exchangeable filter medium, the filtrate storage tank has a filtrate discharge port for discharging the filtrate, and a fluid of an aspirator of a decompression unit in the storage tank. An apparatus for treating waste liquid such as paint, comprising a decompression fluid outlet connected to an inlet, and the filtrate outlet connected to a fluid inlet of an aspirator of the filtrate diluting section. 3. The filtrate diluting section includes a diluting liquid supply port through which water flows in from a drain port of an aspirator in the decompression section in the storage tank, and a filtrate supply port through which the filtrate flows. The wastewater treatment device for a paint or the like according to claim 1, further comprising a filtrate dilution tank, wherein the filtrate is diluted using water of the aspirator. 4. An aspirator in the decompression section in the storage tank and an aspirator in the filtrate diluting section are both a decompression / dilution aspirator, and the decompression fluid discharge port and the filtrate discharge port are switched to a fluid suction port of the aspirator. 3. The apparatus for treating a waste liquid such as paint according to claim 2, wherein the apparatus is freely connected, and the aspirator performs both pressure reduction in the filtrate storage tank and dilution of the filtrate. 5. The apparatus for treating a waste liquid such as a paint according to claim 1, wherein the filtration tank is rotatably arranged in a horizontal direction with respect to the filtrate storage tank. 6. The filtrate storage tank has a color detection unit for detecting a color of the filtrate in the storage tank, and a color detector for adsorbing the color in the filtrate at a stage subsequent to the filtrate dilution unit. The waste liquid treatment device for a paint or the like according to any one of claims 1 to 5, wherein the color suction portion is connected to the waste water treatment device. 7. An observation window for internal observation is provided in each of the tank, a filtration tank for filtering waste liquid in the tank, and a filtrate storage tank for storing the filtrate filtered in the filtration tank. A waste liquid treatment device for a paint or the like according to any one of Items 1 to 6.