JP3409911B2 - Wastewater treatment method from seed disinfection germination process - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to seeds of angiosperms such as seed rice.
Pigment discharged from the disinfection and germination process of offspringColoring substances such as,
Treatment of wastewater containing pesticides and fungicides and surfactants
Methods, especially disinfection and germination of seeds such as rice and barley seeds
Discharged from the process and attached to the surface of seeds such as rice and barley seeds.
WoreColoring substance, Insecticides and fungicides and surfactants
The present invention relates to a method for treating contained wastewater. [0002] 2. Description of the Related Art A place for storing seeds of angiosperms such as seed rice.
For example, stupid seedling disease of rice seed rice, rice singares
To avoid damage by pests such as c
Insecticides and fungicidesSterilization treatment. An example
For example, in order to avoid damage to rice seed paddies caused by stupid disease
Means thiophanate methyl, triflumizole, cap
Tan, thiabendazole, thiuram, benomyl, pephra
Fungicides such as zoate and fenitrothion are used,
Also, for rice singing nematodes, for example, thiol
Cyclam, MEP, Cartap, MPP, MP
Insecticides such as MC agents have been used. By the way, seed rice
Kill seeds of angiosperms such asFungusThe disinfection process is based on sterilization and disinfection of pesticides.
Insecticideas well asFungicide,And the aboveTo water for insecticides and fungicides
Added to help disperse and adhere to seeds, etc.
Color indicating the status of the surfactant and the insecticide disinfection treatment
Aqueous solution in which colored substances such as nitrogen are dissolved or dispersed at high concentration
Is sprayed or sprayed on the seeds of angiosperms and dried.
Is performed by [0003] However, the seeds thus sterilized are disinfected.
Seeds of angiosperms such as paddy are immersed in water just before sowing in the nursery
The seeds are germinated and sown on the nursery.
Is attached to the seeds of angiosperms such as this seed paddyInsect killing
Agent, fungicideColoring substances such as surfactants and dyes elute
Colorants, insecticides and fungicides, and surfactants.
The water contained is discharged as germination process wastewater. [0004] Problems to be solved by the present invention
Wastewater from the poison germination process contains, as described above,
Surfactant,Insecticides and fungicidesContains a lot of
It is fish that discharges this wastewater into rivers, lakes and marshes.
Harmful to water, and significantly reduces water and environmental pollution.
May be caused by
In this case, it is preferable that
Not a problem. Disposal of seeds such as seeds from the disinfection and germination process
In the water,Insecticides and fungicidesTo increase the infiltration of wood
Contains a large amount of surfactant and displays the status of disinfection
For example blueColor coloring matterBecause it is deeply contained, it is pure
This makes the conversion process very difficult. For example,
Mineral or organic wastewater from the seed disinfection and germination process
A method of adding a flocculant and a flocculant and filtering the mixture has been proposed.
However, this method has little water purification effect.
The wastewater thus flocculated by the flocculant is filtered,
A suspension of an inorganic adsorbent such as powdered activated carbon is added to the filtrate.e
ToA method has been proposed, but even with this method,Insecticide, killing
Fungicide, Surfactant and blueColored substanceExpected about
Almost no removal effect can be obtained. And this place
If the used adsorbent is separated by filtration,
Again, difficult, again, organic, for example, polymeric flocculants
The problem requires the use of. [0006] The seed disinfection and germination of seeds such as seeds
Add a suspension of inorganic adsorbent such as powdered activated carbon to wastewater
After adsorption treatment, inorganic or organic coagulant and coagulation
Add auxiliaries, disinfect pesticides, surfactants and blueWearing
Color substanceAnd used inorganic adsorbents are aggregated and filtered
Although a method has been proposed, this method uses an inorganic adsorbent
In proportion to the amount of suspension used, disinfectant pesticides, surfactant
Agent and blueColored substanceRemoval effect is improved, but wastewater is
It could not be colorless and transparent. Moreover, powder
When using activated carbon in a shape, a large amount of activated carbon is required.
And a large amount of used activated carbon is generated.
New environmental pollution around the water treatment facility
The disposal of used activated carbon becomes a problem. The present invention
For the treatment of wastewater from the conventional seed disinfection and germination process for seeds
PutInsecticides, fungicides, Surfactant and blueColored substance
To solve the problems related to the removal of waste and the removal of the remover.
The purpose is. [0007] SUMMARY OF THE INVENTION The present invention relates to an angiosperm such as a seed paddy.
Discharges wastewater from the plant seed disinfection and germination process to rivers, etc.
Detoxification can be performed as much as possible, and the generation of waste
Seeds that are less raw and can be processed in simple processing steps
Treatment of wastewater from the seed disinfection germination process of angiosperms such as paddy
It is intended to provide a way. That is, the present invention provides a method for disinfecting seeds of an angiosperm plant.
Discharged from the bud process,Insecticides, fungicides, Surfactant and
Wastewater containing water and coloring substances is filtered through a filter.
Through the granular or fibrous activated carbon layer,Insecticide, disinfection
AgentAdsorbing and removing a part of the surfactant and the coloring substance,
An oxidizing agent is added to the wastewater that has passed through the activated carbon layer to kill the wastewater.
Insects and fungicides, surfactants and coloring substances are oxidized
Disinfection and germination of seeds of angiosperms, characterized by removal
Discharged from the process,Insecticides, fungicides,Surfactant andWear
Color substanceWastewater treatment method. In the present invention, the seeds of angiosperms such as seed rice
Wastewater from disinfection germination processInDerived from the seed bark of angiosperms
Solids such as fibrous suspensions are separated by filtration through a fine filter cloth.
Is done. This filtration prevents clogging of the next activated carbon layer.
Stop, insecticide and fungicide, surfactant and blue color
Adsorption and separation of substances by activated carbon layer should be performed for a long time.
And make it possible. [0010] In the present invention, the absorbent packed with granular activated carbon is used.
As for the landing, one tower is enough,Insecticide in the wastewater, sterilization
Agent, Can remove surfactants and coloring substances
However, a granular activated carbon packed tower is provided with a bypass and connected in series or in parallel.
When placed on, coloring components, insecticidal components, bactericidal componentsas well asinterface
Activated carbon for activator removalFilled withUse of adsorption tower
The route can be changed as appropriate depending on the situation of its removal.
Can be controlled so that the degree of adsorption is uniform,
It is easy to use activated carbon without waste. [0011] In the present invention, the granular activated carbon is filled.
Remains in the adsorption tower without being removed by pretreatment by filtration
Frequency of use as very small amounts of suspended matter may flow in
The tower structure can be backwashed according to the
Stabilizes wastewaterdo itIt is preferable because it can be processed. Activity
Charcoal is granular or fibrous to facilitate water flow
It is particularly preferable that the particles are granular. Also use
The particle size of the granular activated carbon to be used is 8 to 42 mesh
Preferably, for example, 8 to 32 mesh for coarse
12 to 42 mesh for finer
It can be. In the packed adsorption column of granular activated carbon
Means that the contact time between wastewater and activated carbon per adsorption tower is 5 times
15 minutes, but preferably 8-12 minutes
No. The contact time between waste water and activated carbon is 5 to 60 minutes in total.
However, the time is preferably 5 to 30 minutes.
Increase or decrease the size or number to optimize the contact between wastewater and activated carbon
It is preferable to adjust the interval. Space velocity of granular activated carbon
5 hours depending on particle size and temperature of adsorption tower^-1Below, 1
~ 5h^-1And the linear flow velocity should be 2 to 10 m / h.
preferable. In the present invention, the spent activated carbon layer is calcined.
Since it is played back, it can be reused. Activated carbon
Raw, put the activated carbon in the regeneration furnace, dry, after drying, in the furnace
The temperature is 360 to 600 ° C, preferably 460 to 50
By heating to a temperature of 0 ° C., the adsorbate is vaporized and decomposed.
Then raise the temperature and bring it into contact with water vapor and carbon dioxide.
It is performed by activating. In the present invention, the acid
The agent is, for example, a coloring substance such as water blue,
Insecticides such as MEPs such as thion, and peffs such as healthy seeds
Oxidative degradation of fungicides and surfactants such as lazoate
Coloring substances, insecticides
Ability to oxidatively decompose chemicals, disinfectants and surfactants
If any decomposition products are not harmful
Oxidizing agents can also be used. As such an oxidizing agent
Use hypochlorite, chlorine, bleached powder, ozone, etc.
can do. As an oxidizing agent, for example, hypochlorous acid
If soda is used, hypochlorite in wastewater after addition
Acid soda concentration of 0.05 to 0.4% by weight, preferably
Or sodium hypochlorite so as to be 0.16% by weight.
But the effective chlorine concentration is 1.2 to 6% by weight.
Preferably, a solution of sodium chlorite is added to the wastewater. [0013] The effluent discharged from the adsorption tower is added with an oxidizing agent and stirred.
Stir. However, in this case, the oxidant is agitated
It is added to the waste liquid. Stirring may be performed with a stirrer.
And it can be stirred by aeration with air.
You. The time required for the stirring reaction depends on the type of waste liquid content and stirring.
It may fluctuate slightly depending on the stirring speed and ambient temperature.
For example, when the stirring speed is 60 rpm at room temperature,
Above, preferably 1 to 5 minutes to fully achieve the purpose
be able to. [0014] The present invention relates to a process for disinfecting and germinating seeds of an angiosperm plant.
Discharged,Insecticides, fungicides, Surfactants and coloring substances
The wastewater containing is filtered through a filter, and the filtrate is granulated.
Through the fibrous activated carbon layer,Insecticides, fungicides, Surface activity
Adsorbing and removing a part of the coloring agent and coloring substance, and pass through the activated carbon layer.
Add an oxidizing agent to the wastewaterInsecticide, disinfection
Agent, Which removes surfactants and coloring substances by oxidation
That is, for wastewater, adsorption of activated carbon layer of the first stage
By combining the separation process with
UnderwaterInsecticides, fungicidesRemoves surfactants and coloring substances
Is what you do. In the present invention, the first activated carbon layer
In the adsorption separation process, wastewaterInsecticides, fungicides, Surface activity
Most of the coloring agents and substances are adsorbed and separated in the activated carbon layer.
However, some of the components in the wastewater are separated into activated carbon layers.
These components flow out of the adsorption tower without being adsorbed.
Is made harmless by oxidative decomposition treatment. [0015] In the present invention, the activated carbon layer of the packed tower is used.
AndInsecticides, fungicides, Surfactants and coloring substances
As well as adsorption and microfiltration, wastewater
Clear treated water can be obtained easily and relatively short
In the wastewaterInsecticides, fungicides, Surfactants and coloring substances
Removal processing can be performed.
Costs are low, so the economy is fully satisfied
Things. In addition, the present invention provides the
The treated water that has been clarified by filtration is further treated with an oxidizing agent.
Oxidation treatment prevents wastewater from being removed by the activated carbon layer
Traces that remain inInsecticides, fungicides, Surfactant and coloring
Can be easily removed by oxidative decomposition,
Treated water can be obtained. [0016] Embodiments of the present invention will be described below with reference to the drawings.
An example will be described.
The invention is not subject to any restrictions. Fig. 1
It is a schematic process drawing in one Example of light. Figure 2
Filtration step, adsorption step and oxidation in another embodiment of Ming
It is a schematic process drawing showing a processing process. In either figure
Also, instruments and other detailed parts are omitted,
Not shown. Sterilization and disinfection of pesticides, fungicides, and surfactants
Add wastewater from disinfecting and germination process, including germicides and coloring substances
The wastewater tank 1 includes a flow path 4 including an on-off valve 2 and a liquid feed pump 3.
Is connected to the microfiltration device 5. Precision filter 5
Above the first adsorption tower 8 via a flow path 7 having an on-off valve 6
It is connected to the sprinkling pipe 9 arranged in the section. First adsorption
The tower 8 is provided with a granular activated carbon layer 10, and wastewater is
While passing through the granular activated carbon layer 10, sterilization and elimination in wastewater are performed.
Poison pesticideInsecticides and fungicides, SurfactantAndColoring matter
Is removed. Of wastewater not removed by the first adsorption tower 8Killing
Insecticide, fungicide, To remove surfactants and coloring substances
The first adsorption tower 8 is connected via a flow path 12 provided with an on-off valve 11.
Connected to a sprinkler pipe 14 arranged above the second adsorption tower 13
ing. In the second adsorption tower 13, a granular activated carbon layer 15 is provided.
Provided in the treated water discharged from the first adsorption tower 8.Insect killing
Agent, fungicide, Surfactants and coloring substances, the treated water,
While passing through the granular activated carbon layer 15 of the second adsorption tower 13,
In treated waterInsecticides, fungicides, Surfactants and coloring substances
It is removed by the granular activated carbon layer 15. Second adsorption tower 13
Treated water flowing out ofInsecticides, fungicides, Surface activity
Agent and coloring substances may remain.
StayInsecticides, fungicidesRemoves surfactants and coloring substances
In order to perform the operation, the second adsorption tower 13 has a flow
It is connected to an oxidation treatment tank 18 via a passage 17. In this embodiment, the oxidation treatment tank 18 contains
Instruments such as a thermometer, thermometer and liquid level meter
Monitoring and controlling the progress of the oxidation reaction and
Discharge of wastewater can be controlled. In this example
In the oxidation treatment tank 18, hypochlorite with an effective chlorine concentration of 6%
So that sodium hypochlorite solution is supplied
Hypochlorous acid from a lium solution supply tank (not shown)
A sodium solution supply pipe 19 is connected, and an oxidation treatment tank
At the bottom of 18, an air inlet pipe 20 for stirring and oxidation is oxidized.
It is provided to protrude into the processing tank 18. Oxidation tank 1
The treated water oxidized in 8 has an on-off valve 21
The water is discharged to the outside via the drain pipe 22. This embodiment is configured as described above.
Then, the on-off valve 2 is opened, the on-off valve 6 is closed, and the pump 3 is operated.
Then, the wastewater 23 in the wastewater tank 1 is sent to the microfilter 5,
Filter out rice husks and rice hull swords. Rice husks and rice hull swords are removed
The filtrate obtained is opened by opening the on-off valve 6 and sprayed on the first adsorption tower 8.
It is sent to a pipe 9 and sprinkled on a packed bed 10 of activated carbon. Activity
The wastewater sprinkled on the coal bed 10Insecticide, killing
Fungicide, Surfactants and coloring substances are removed. In this example
In the wastewater treated in the first adsorption tower.Insecticide, disinfection
Agent, The amount of surfactants and coloring substances, compared to the second adsorption tower
The first adsorption tower is larger than the second adsorption tower
The activated carbon in the adsorption tower can be used effectively
It is preferred. The embodiment shown in FIG. 2 has a first adsorption tower and a second adsorption tower.
That multiple adsorption processes with adsorption towers are provided in parallel
It is an example, and the wastewater from the wastewater tank is the same as the embodiment of FIG.
In addition, from the wastewater tank through the on-off valve and the waste liquid pump, the filter
Wastewater is sent to the adsorption process after being filtered by a filter.
However, the step of sending wastewater from the wastewater tank to the filtration device is omitted.
And not shown. In the embodiment of FIG.
The same reference numerals are given to the portions corresponding to the embodiment.
ing. In this example, it is filtered and introduced into the adsorption process.
Wastewater initially flows from the first adsorption tower to the second adsorption tower
However, when the adsorption capacity of the first adsorption tower decreased,
Wastewater introduced from the second adsorption tower to the first adsorption tower
To effectively use the adsorption capacity of the first and second adsorption towers.
This point is shown in FIG.
This is different from the embodiment described above. In this embodiment, the same as in the embodiment of FIG.
Thus, the wastewater from the wastewater tank 1 is sent to the filtration device 5 and filtered.
Rice husks and rice hull swords are filtered off in
The on-off valve 6 is opened and supplied to the adsorption device 24. Channel 7
Is provided with a flow path 26 having an on-off valve 25 and an on-off valve 27
It is connected to a flow path 30 including a flow path 28 and an on-off valve 29.
You. The flow path 26 provided with the on-off valve 25 is used in this embodiment.
In addition, it is branched into two, and the first wastewater treatment channel 31 and
And 32. First wastewater treatment channels 31 and 32
, Respectively, the first adsorption tower 8 and the second adsorption tower 13 in this order
Connected, the first adsorption tower 8 and the second adsorption tower13In order
Drain the wastewaterInsecticides, fungicides, Surfactants and
Adsorb and remove coloring substances. Each first wastewater treatment channel 31 and
32 treated water outflow channels 33 and 34 of the second adsorption tower 13
Is connected to the first adsorption treatment water discharge flow path 36 having the on-off valve 35.
Connected. First adsorption treatment water discharge passage 36ToIs an on-off valve
On the upstream side of 35, clean water for backwashing provided with an on-off valve 37
The supply channel 38 is connected. The flow path 28 provided with the on-off valve 27 is used in this embodiment.
In addition, it is branched into two, and the second wastewater treatment channel 39 and
And 40. The respective second wastewater treatment channels 39 and
And 40 are in the order of the second adsorption tower 13 and the first adsorption tower 8, respectively.
Connected to the adsorption tower, the first wastewater treatment channels 31 and 32
And the flow is reversed. Second wastewater treatment channel first
By connecting each adsorption tower in the opposite direction to the wastewater treatment channel
Thus, the ability to adsorb activated carbon can be effectively used. No.
(2) treated water outflow passage 41 of wastewater treatment passages 39 and 40;
42 is connected to the second adsorption treatment water discharge channel 43,
The second adsorption treatment water discharge flow path is provided for the first adsorption treatment water discharge flow.
The passage 36 is connected downstream of the on-off valve 35. The first adsorption treated water discharge passage 36 is
Connected to the treated water discharge channel, and in each adsorption tower,Insecticide, disinfection
Agent, Surfactants and coloring substances are removed by adsorption.
Oxidation treatment tank 18 for subsequent oxidation treatment of the treatment wastewater.
Is opened on the oxidation treatment tank 18 so as to be introduced into the oxidation treatment tank 18.
In this example, an aeration space is provided at the bottom of the oxidation treatment tank 18.
An air outlet pipe 44 is connected via a flow path 46 provided with an on-off valve 45.
Connected to a compressor (not shown).
In this embodiment, as in the embodiment of FIG.
A pH meter, a thermometer, a liquid level meter, etc.
Of the oxidation reaction and the point of discharge
Can be monitored and controlled. In this example, the oxidation
The sodium hypochlorite aqueous solution of the agent
For example, tap water supplied with sodium chlorite from a pipe 48
It is prepared by dissolving in water. Prepared sodium hypochlorite
Aqueous solution is supplied to the oxidation treatment tank 18 by a chemical solution pump 49.
It is controlled to supply a predetermined amount. The wastewater treated in the oxidation treatment tank 18 is oxidized.
Open from the outlet 50 formed in the upper part of the processing tank 18.
It is discharged from a discharge pipe 52 having a valve closing 51. Oxidation treatment
Almost no sedimentation sludge is generated in the tank 18, but the wastewater for cleaning is
As an application, an on-off valve 53 is provided at the bottom of the oxidation treatment tank 18.
A discharge path 54 is provided. In this example,
The flow path 30 provided with the on-off valve 29 connects the first and second adsorption towers.
This is a discharge channel for the backwashed liquid when backwashing. Since the present example is configured as described above,
The wastewater from the disinfection germination process is supplied to the on-off valves 6, 25 and 35.
Since it is open, it is filtered by the filter 5 and
Flows into the first wastewater treatment channels 31 and 32. Each first wastewater
The wastewater that has flowed into the processing channels 31 and 32 is
It flows to the landing tower 8 and the second adsorption tower 13 to disinfect the wastewater.
Pesticide pesticides and fungicides, surfactants and coloring substances
After being adsorbed and removed, the treated water outflow channels 33 and 34
The first adsorption treatment water flows into the single adsorption treatment water discharge passage 36,
It flows into the oxidation treatment tank 18 from the discharge flow path 36. Adsorption of the first adsorption tower 8 in each first wastewater treatment channel
When the function has been exhausted, the on-off valves 25 and 35 are closed and opened.
Open the valve closing 27 and check the disinfection germination process filtered by the filter 5
These wastewaters are caused to flow through the flow path 28. Wastewater flowing into channel 28
Flows into the second wastewater treatment channels 39 and 40,
Flow from the second adsorption tower 13 in the wastewater treatment channel to the first adsorption tower 8
And pesticides, fungicides, surfactants and coloring matter in the wastewater.
The water is adsorbed and removed and flows into the treated water outflow channels 41 and 42.
Put out. Treatment flowing out to each treated water outflow channel 41 and 42
The water flows into the second adsorption treatment water discharge channel 43 and joins,
From the second adsorption treatment water discharge passage 43 to the first wastewater treatment passage 3
6 and flows into the oxidation treatment tank 18. The treated water flowing into the oxidation treatment tank 18 contains a chemical.
By the operation of the liquid pump 49, a predetermined amount of
An aqueous solution of sodium hypochlorite is injected. So the con
Activate the presser and blow out from the air blowing pipe 44
The oxidation reaction is performed by stirring with the flowing air flow,
RemainInsecticides, fungicidesAcid, surfactants and coloring substances
Decompose. In this example, the wastewater
ofInsecticides, fungicides, Surfactants and coloring substances
, Oxidized and decomposed, rendered harmless, and waterways such as rivers
Can be released. Backwash the first and second adsorption towers
Closing valves 6, 27 and 35 are closed to open and close valves 25, 29 and
Open 37 and pour clean water such as tap water from the backwash channel.
Then, the first adsorption tower 8 and the second adsorption tower 1
3Backwash. The backwashed water passes through on-off valves 25 and 29.
And is discharged from the flow path 30. Example 1 Seed that has been subjected to sterilization and insecticidal treatment is immersed in water tank 1 for 1 to 2 days
Dipped. The dipped seed rice is pulled up from the dipping tank 1 and drained.
Perform The immersion waste water is drained from the drain pipe 4 at the bottom of the immersion water tank 1,
2.0 kg / cm pressure by pump 3^TwoAspirate and eyes
With a microfiltration filter with an opening of 30 μm
It is pumped to a microfilter, and the rice hulls and the like are separated by filtration. Chaff
After filtering the wastewater, open the on-off valve 6 and remove
First suction filled with coal-based granular activated carbon of up to 32 mesh
It is sent to the sprinkling pipe 9 of the landing tower 8 and is connected to the activated carbon packed bed 10.
It is sprinkled continuously. The packed bed 10 of the first adsorption tower is packed
The packing density is 0.43 g / cc, and the iodine adsorption performance is 1.
0 g / g, and the height of the activated carbon layer is 500 mm.
Was. In this example, the flow conditions of the wastewater in the adsorption tower are as follows:
Space velocity 1-5h^-1And the linear velocity is 2.84 m /
h (4.8 cm / min). In this example, the second adsorption
The adsorption treatment in the tower is the same as that for the first adsorption tower
The first and second adsorption towers are connected in series
I have. The contact time in each adsorption tower shall be at least 10 minutes,
It took 20 minutes or more in two towers in series. This activated carbon adsorption process
Wastewater is decolorized and treated wastewaterPesticides and killing
FungicideWas 0.1 ppm or less. The wastewater adsorbed in the second adsorption tower has a pH of
The water is sent to a water storage tank 18 having a thermometer and a thermometer. Adsorption treatment
When the wastewater reaches 6000 ml,
9% aqueous solution of sodium hypochlorite containing 6% by weight of available chlorine
Add a few liters and allow to react for 20 minutes under aeration of air
Was. After the oxidation reaction for several minutes, the remaining colored substance
The slightly colored color disappeared. This oxidation treatment
Remaining slightlyInsecticides, fungicides, Surfactant and wear
The color substance is oxidatively decomposed to obtain colorless and transparent treated water.
You. The wastewater is continuouslyOxidation treatmentIntroduced into tank 18 and air
Oxidation treatment with sodium hypochlorite under aerationYou
You. Oxidation treatmentTreated water can be discharged into waterways.
Was. The results of wastewater treatment in this example are shown in Table 1 below.
there were. [0032] Table 1             ぺ Furazoate Fenitrothion InstructionColoring substance*^Four             (Hellseed) (Sumithion) Blue Water                 Content Content               (Ppm) (ppm) Wastewater (raw water) 125 0.20 1.05 Filter outlet water 124 0.16 1.04 Distribution water 1     I Tower Exit *¹  0.20 <0.01 0.001     Tower II Exit *^Two  0.01 <0.01 0.000 Distribution water 5     I Tower Exit *¹  0.95 <0.01 0.002     Tower II Exit *^Two  0.05 <0.01 0.000 Distribution water 10     I Tower Exit *¹  2.25 0.01 0.003     Tower II Exit *^Two  0.17 <0.01 0.001 Distribution water 15     I Tower Exit *¹  3.65 <0.03 0.004     Tower II Exit *^Two  0.50 <0.01 0.002 Distribution water 10     At the exit of Tower II Acid of water for adsorption treatment Decomposed water *^Three  <0.01 <0.01 0.000                                                     (Colorless and transparent) Detection limit 0.01 0.01-   note*¹: The outlet of the I tower is the outlet of the first adsorption tower having the granular activated carbon packed bed.           At the outletInsecticides and fungicidesConcentration.   note*^TwoThe outlet of the II column is the flow of the second adsorption column having a packed bed of granular activated carbon.           At the exitInsecticides and fungicidesConcentration.   note*^Three: An aqueous solution of sodium hypochlorite containing 6% by weight of available chlorine,Adsorption treatment           1.5 milliliters per liter of waterLukaThis is the case.   note*^Four: InstructionColoring substanceThe concentration of water blue is 630 visible absorption wavelength.           The decolorization performance was evaluated by the absorbance at nm.   Note: Distribution water 1, distribution water 5, distribution water 10 and distribution water 15 are granular           10 times, 50 times, 100 times and 150 times of activated carbon filling           Indicates the time of water flow treatment. In the granular activated carbon packed bed, waste water is drained from above.
Water for several days, then pour clean water through
Water at a linear velocity of 0.1 to 0.3 m / min.
Backwash the activated carbon packed bed and again fill the wastewater with granular activated carbon
Purified through layers. [0034] Industrial Applicability The present invention provides a method for disinfecting and germinating seeds of an angiosperm plant.
Discharged from the process,Insecticides, fungicides,Surfactants and clothes
The wastewater containing the color material is filtered through a filter, and the filtrate is filtered.
Through granular or fibrous activated carbon layer,Insecticides, fungicides,World
Adsorbing and removing a part of the surfactant and the coloring substance, the activated carbon
An oxidizing agent is added to the wastewater that has passed through theInsecticide,
Fungicide,Removes surfactants and coloring substances by oxidation
Therefore, compared to the conventional method, it is easier to decolor the colored substance,
Still slightlyInsecticides, fungicides,Surfactant and
Colored substances are easily oxidized by oxidizing agents and decomposed.
In addition, compared to the conventional method,WastewaterSolid material
Min, insecticidal and bactericidal components of disinfectant pesticides,common Biniinterface
It can remove activators and coloring substances.
The cost required for removal processing is reduced, and
Excellent in In the present invention, the activated carbon layer of the packed tower is used.
AndInsecticides, fungicides,About surfactants and coloring substances
Adsorbed and filtered, removed by activated carbon layer
Traces remaining in wastewater withoutInsecticides, fungicides,Surfactants and
And color components are oxidatively decomposed with an oxidizing agent.,Conventional method
Solid components in wastewater, sterilization
Disinfectant pesticides and fungicides,AndSurfactant and
All components such as coloring substances can be removed. Also,
In the present invention, the adsorption treatment with activated carbon is
Remain inInsecticides, fungicides,For surfactants and coloring substances
And oxidatively decompose, as well as firing and activating activated carbon
Therefore, compared to the conventional method, less waste,Insect killing
Agents, fungicides,Easy removal of surfactants and coloring substances
Becomes

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic process drawing in one embodiment of the present invention. FIG. 2 is a schematic process diagram showing a filtration step, an adsorption step, and an oxidation treatment step in another embodiment of the present invention. [Description of Signs] 1 Wastewater tanks 2, 6, 11, 16, 21, 25, 27, 29, 35,
37, 45, 51, 53 On-off valve 3 Liquid feed pump 4, 7, 12, 17, 26, 28, 30 Flow path 5 Microfiltration device 8 First adsorption tower 9, 14 Sprinkler tube 10, 15 Granular activated carbon layer 13 Two adsorption towers 18 Oxidation treatment tank 19 Sodium hypochlorite aqueous solution supply pipe 20 Air introduction pipe 22 Drain pipe 23 Wastewater 24 Adsorption device 31, 32 First wastewater treatment channels 33, 34, 41, 42 Treated water outflow channel 36 First adsorption treatment water discharge passage 38 Backwashing clean water supply passages 39, 40 Second wastewater treatment passage 43 Second adsorption treatment water discharge passage 44 Air blowing pipe 49 Chemical liquid pump 52 Discharge pipe 54 Discharge path

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeru Kitano 29, Yakushido-cho, Kanazawa-shi, Ishikawa Pref. (56) References JP-A-57-130583 (JP, A) JP-A-61-90787 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C02F 1/28 C02F 1 / 70-1/72 B01D 36/00-37/08

Claims (1)

(57) [Claims 1] Wastewater containing insecticides, fungicides , surfactants and coloring substances discharged from the seed disinfection and germination of angiosperms is filtered through a filter. The filtrate is passed through a granular or fibrous activated carbon layer to absorb and remove a part of insecticides, bactericides , surfactants and coloring substances, and an oxidizing agent is added to the wastewater that has passed through the activated carbon layer. Fungicide,
A method for treating wastewater containing an insecticide, a fungicide, a surfactant, and a coloring substance , which is discharged from a step of disinfecting and germinating seeds of an angiosperm, wherein the surfactant and the coloring substance are removed by oxidation.