JP3443073B2 - Pesticide waste liquid treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention
Pesticide waste liquid using oxidation reaction and reduction reaction by electrolysis
Pesticide wastewater that mineralizesPlaceRelated to a physical device. [0002] 2. Description of the Related Art Conventional methods for treating pesticide waste liquids have been generally described.
A flocculant to the pesticide waste liquid and pass it through activated carbon
It is common to adsorb and remove drug components. Or pesticides
A coagulant is added to the waste liquid, which is subjected to dehydration treatment.
Is passed through activated carbon to remove the pesticide components by adsorption. [0003] In any case, in the conventional treatment method, the medicine
Coagulation treatment method using a coagulant (coagulant) is the mainstream.
As for the form, pH adjustment (neutralizing agent) → flocculation reaction tank (coagulant injection) → polymer reaction tank (polymer injection) → settling tank → pH adjustment (neutralizing agent) → activated carbon tower → discharge     └ → Filter press (injection of pre-coating agent) → Dewatered cake In general, the order is as follows. Also, excess sludge
If dried after dehydration, or as a wet cake
Has been disposed of. [0004] SUMMARY OF THE INVENTION
Water treatment method for conventional coagulation and sedimentation treatment
Was simply spread for pesticide wastewater, especially soaking wastewater.
Etc. are released without going through the coagulation sedimentation process.
There is no basis for decomposability and attempts to drain only by activated carbon adsorption
It was a very vague process. [0005] Further, in the agricultural chemical waste liquid treatment field,
Due to the slow spread of equipment and the expensive processing equipment,
After untreated release and infiltration into the basement
Pollution of groundwater, rivers, soil, etc.
coming. The present invention has been made in view of such circumstances.
Mineralize pesticide waste liquid used for various purposes
(Detoxification) treatment, the treated water pollutes organisms and the environment
Released into rivers and seas without reuse or reused
To provide a method and an apparatus for treating pesticide waste liquid that can be used
And for the purpose. [0007] [MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
The present inventionAgricultureTreatment of chemical wasteThe device is received as a component.
Water tank, ozone reaction tank, ozone generator, electrolysis tank and active
Equipped with a charcoal tank. The receiving tank flows in from outside the device.
A level sensor that detects the liquid level of
Ozone reaction of pesticide waste liquid when surface level is above specified level
And a pump to be introduced into the tank. Ozone reaction tank receives water
Level to detect the liquid level of the pesticide waste liquid introduced from the tank
Sensor and the waste liquid from the tank to the ozone generator
The first pump and the agricultural chemical waste liquid in the tank to the electrolysis tank.
A second pump to enter and a titanium membrane
And a lamp for UV irradiation is provided inside
Measures the oxidation-reduction potential of the reaction inner cylinder and the pesticide waste liquid in the tank
Oxidation-reduction potentiometer. Ozone generator
Pesticide waste liquid sent out by the first pump of the
Has an ozone gas-liquid mixing tower that mixes while pressing the zon
You. The electrolysis tank is operated by the second pump of the ozone reaction tank.
Collect the scum generated by the reduction reaction of the sent pesticide waste liquid.
Has a scum collection mechanism that collects and separates scum and liquid
You. The activated carbon tank is used for processing liquid sent from the electrolysis tank.
The remaining pollutants are adsorbed and removed. these
Perform the following first, second and third steps in the components
It is characterized by performing. From the receiving tank to the ozone reaction tank
Pesticide waste liquid collected accumulates in an ozone reactor over a specified amount
And the agricultural chemical waste liquid is supplied to the ozone generator by the first pump.
Introduced into ozone gas-liquid mixing tower and pressurized and mixed with ozone
After that, mix the gas-liquid mixture on the inner cylinder for reaction in the ozone reactor.
From the lower opening to the inside of the ozone reactor.
Irradiate ultraviolet rays inside the inner cylinder while staying in the inner cylinder for a predetermined time
The first stage to do. Ozone measured by redox potentiometer
Ozone Oxidation Based on Oxidation Potential of Liquid in Reactor
After the reaction has progressed, the pesticide waste liquid in the ozone reactor is
Pump to the electrolysis tank sequentially,
Scum generated by the reduction reaction Removed by cam collecting mechanism
Then, the electrolyzed liquid is returned to the ozone reaction tank again.
Introduced into the inner tube for reaction and mixed with ozone gas-liquid from the ozone reactor
Second stage of circulating the tower, inner cylinder and electrolyzer. Oxidation
Liquid acid in ozone reactor measured by reduction potentiometer
When the activation potential reaches a predetermined value set for each pesticide waste liquid,
Terminates the oxidation reaction by the ozone and removes the liquid in the ozone reactor.
It is sent to the electrolysis tank sequentially, and scum is removed by electrolysis.
The removed treated water is sent to an activated carbon tank, where the remaining
The third stage in which suspended substances are adsorbed and removed and then discharged. This processapparatusIs used for mineralization of pesticide waste liquid
Using oxidation reaction by ozone and reduction reaction by electrolysis
The strong oxidizing power of ozone makes chemicals in waste liquid
The reaction between the substance and ozone results in the hydrolysis of ozone
Hydroperoxy radical (HO_Two・) Generates the potential
The chemical substance having
Mineralize in a short time. Furthermore, it passes through the waste liquid after the ozone reaction.
Is repelled and dispersed by ozone oxidation.
Negatively charged pollutant charges are neutralized and reduced
Pollutant adsorbs and aggregates on each other, resulting in floc growth
Becomes quicker. The mechanism is as follows.
is there. When electricity is applied to the pesticide waste liquid, electrolysis occurs
Bubbles are generated. This generated gas is composed of hydrogen 2: oxygen 1
Float of floc
Separation is promoted. In particular, for pesticide components, white kerosene is used as an emulsifier.
Oil component becomes finer and becomes emulsified
Is difficult to remove with conventional coagulation sedimentation
It is. The oil particle size is 10^-7-10^-Fourcm
It becomes heavy oil after zon reaction and is negatively charged. this
The negative charge is neutralized by electrolysis and adsorbs each other.
Longer, oil and water separate. The above-described oxidation reaction and electrolysis by ozone
The scum generated is separated and removed by the effect of the reduction reaction
It is possibleYou. The order of the oxidation reaction and the reduction reaction is as follows.
Oxidation reaction, followed by electrolysis reduction reaction
To doYou.And oxidize the reaction water after electrolysis
Circulation for the reaction and the reduction reaction.And toMore pollutants 7
0-99% can be removed. Furthermore, after the reduction reaction
Pass the treated water through activated carbon to remove residual chemicals contained in the treated water.
To remove qualityAnd toMore than 99% of pollutant removal rate
Can be maintained. [0012] In addition, on the surface of activated carbon,
To form a black filtration membrane.And toMore pesticide components
To form micro-flocs due to electrolytes
Thereby, the filtration accuracy is improved. It is an electrolyte for pesticide components.
With surfactants, metals and organic binders
Many, self-emerge as coagulation aid during electrolysis reaction
You. Some of them form a filtration membrane on the surface of activated carbon.
You. However, after the electrolysis, the reduced water
Quality, the zeta potential of the filtration membrane is strong
Activated carbon is easily clogged. Prevent this
Activated carbon after treatment of pesticide waste liquid or after setting
Backwash more, and this backwash wastewater is again subjected to oxidation and reduction reactions.
ReturnAndFloating scum generated by electrolysis for separation and removal
I'm leaving. On the other hand, depending on the components of the agricultural chemical waste liquid, ozone
Depending on the additive, that is, the waste liquid substrate during the oxidation reaction
PH adjusting agent (acidic or alkaline), coagulation
Auxiliaries (PAC), polymer flocculants (cationic, nonionic
System, anion system), oxidation promoter [H_TwoO_Two, Fe (O
H)_Three, MnO_Two, TiO_TwoEtc.)Andis there. Further, depending on the components of the agricultural chemical waste liquid,
Substances that are difficult to decompose even in large amounts of pesticide components
Substances that cause quality, heavy metals, or mutagens
UV irradiation during the oxidation reaction with ozoneAnd
I do. The following is an example of processing for a chemical substance. .Cadnium and its compounds, lead and its compounds, hexavalent
Chromium compounds, arsenic and its compounds, mercury and alkyl
Mercury, selenium: Fe (OH)_Three+ MnO_TwoAnd electrolysis flotation
Up ・ Cyanide compound (ozone oxidative decomposition), organic phosphorus compound:
Ozone oxidation + electrolysis floating + activated carbon adsorption ・ Trichloroethylene, tetrachloroethylene: pH8
/ Ozone + Titanium UV / Electrolysis floating + Activated carbon ・ Carbon tetrachloride, dichloromethane, 1,2-dichloroethane
1,1,1-trichloroethane, 1,1,2-trichloroethane
Tan: electrolysis + activated carbon adsorption ・ Polychlorinated biphenyl (PCB): ozone + titanium U
V ・ 1,1-dichloroethylene, cis-1,2-dichloroethyl
Ren: Ozone oxidative decomposition / electrolysis + activated carbon adsorption ・ 1,3-dichloropropene, thiuram, simazine, thio
Bencalp, benzene: Ozone oxidative decomposition + electrolysis floating ・ Dioxin: hydrogen peroxide + pH adjustment + ozone + titanium
UV decomposition, electrolysis floating, activated carbon ・ Environmental hormone-like substances: nonylphenol / bispheno
A or ozone oxidative decomposition + titanium UV / activated carbon Does the treated water after treatment of pesticide waste liquid reach the wastewater standard value?
Confirmation by simple COD reaction (pack test)
And toAs for pesticides,
Determine the components and COD conversion, for example, Kyoritsu Riken Research
It can be determined by a simple COD pack test made by Toshosha. Also,
For restricted substances, the bioconcentrator method
Pesticide detection kit using the product (for example, Wako Pure Chemical Industries, Ltd.)
) Can also be used. [0017]As described above, the pesticide waste liquid treatment apparatus of the present invention
The installation is a water receiving tank, ozone reaction tank, ozone generator, electrolysis
Equipped with a tank and an activated carbon tank.
Is characterized by the flow of waste disposal. With this processing apparatus, as described above,
70-99% of pollutants contained in chemical waste
be able to. [0019]Finally, the residual water from the treated water from the electrolysis tank
Provide an activated carbon tank to remove existing chemicalsBy dirty
The removal rate of suspended substances can be always maintained at 99%. In this processing apparatus, the electrolysis tank is
Collect the scum generated by the original reaction and separate the scum and liquid.
Has a scum collecting mechanism to separateBut,As a specific example,
Scraper and scum
Having a net basket having a filter cloth for separating liquid
If, for example, scum that floats with electrolysis processing
Can be arbitrarily adjusted. basic action
Now scrape the scum with a scraper with a water content of 97%
And remove it, and remove it with a filter cloth (eg
(For example, a mesh of 30 μm), solid-liquid separated, dried naturally,
Treat waste with a water content of 50% or less. In addition, the ozone reaction depends on the type of the pesticide waste liquid.
The redox potential is measured between the two points of redox.
Oxidation and reduction reactions at a certain oxidation potential
To automatically controlAnd toWhen operating the device,
And set it to reduce ozone oxidation and electrolysis.
It is easy to shorten or extend the processing time,
Even if the concentration changes, the safety as a chemical treatment can be ensured. Further, an ozone concentration monitor is provided around the ozone generator.
A visual sensor is placed, and this ozone concentration monitoring sensor
When the above ozone concentration is detected, the ozone generator
By automatically stopping the generation of ozone,
In the case of one, it can be dealt with quickly and safety can be ensured. However
In this case, the predetermined value of the ozone concentration is 0.05 ppm or less.
When the ozone concentration reaches this value, ozone is generated
Stops automatically.In the present invention, in the first stage,
Makes the mixed gas-liquid stay in the inner cylinder.
"Stay" means simply staying in the inner cylinder and not moving
Instead, the mixture is introduced from above the inner cylinder,
For a predetermined period of time from the opening of the
Pass slowly, and meanwhile make sure that it is located in the inner cylinder.
means. The gas-liquid mixture is passed through the inner cylinder
Within, during which ultraviolet radiation is applied. Also, the second
In the stage, the ozone reaction measured by the oxidation-reduction potentiometer
Oxidation reaction with ozone based on oxidation potential of liquid in reaction tank
After the progress of the agrochemical waste liquid in the ozone reaction tank,
Pump to the electrolysis tank sequentially, where the oxidation potential
Indicates that the oxidation potential of untreated agricultural chemical wastewater is
It indicates the potential when it changes to some extent. Furthermore, the third
In the stage, the ozone reaction measured by the redox potentiometer
The oxidation potential of the liquid in the tank is set for each pesticide waste liquid.
When the value reaches the value, the oxidation reaction by ozone is terminated.
The oxidation potential at, as a result of the oxidation reaction by ozone,
The oxidation potential set according to the type of pesticide waste liquid is the fixed point
(Even if the oxidation reaction is continued further, the potential hardly changes
Point). More about oxidation potential
In other words, a substance having an oxidation potential in the liquid
It is mineralized (solidified), and the oxidation potential increases. Also organic
Becomes floating as oxidation proceeds, and the oxidation potential rises. Toes
During the oxidation process, the pollutants are solidified and suspended.
Based on this, the oxidation reaction proceeds based on the oxidation potential.
The oxidation reaction is terminated when the oxidation potential reaches a predetermined value.
You have determined that. Thus, in the present invention, the redox
Oxidation voltage of liquid in ozone reactor measured by electrometer
Position is used for automation. [0023] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on an embodiment.
Will be described. An apparatus for treating a pesticide waste liquid according to one embodiment thereof
Is shown in FIG. This processing equipment is
Tank (liquid storage tank) 1 for storing oxygen and an oxygen concentrator 2a
Ozone generator 2 and ozone generation from wastewater from receiving tank 1
Inject ozone from greige 2 and oxidize waste liquid with ozone
Ozone reaction tank 3 to be reacted and reaction water of ozone reaction tank 3
Electrolysis tank 4 for performing a reduction reaction by electrolysis,
Adsorb and remove residual chemicals from treated water from decomposition tank 4
An activated carbon tank 5 and a control panel 6 for controlling each part are provided. Ma
In addition, besides the receiving tank 1, soil, rice husk, garbage, etc.
A dust removal pit 7 for removal is provided, and the
A container 8 containing a flocculant as an additive to be charged is provided.
Have been. Each part is a pipe of the required diameter indicated by a solid line in the figure.
Interconnected. Next, each part will be described. Water receiving tank 1, ozone reaction tank 3, and dust pit
7 is provided below the ground G as shown in the enlarged view of FIG.
And is integrally formed of concrete. Receiving
The water tank 1, the ozone reaction tank 3 and the dust removal pit 7 are respectively
Has manholes 10, 11, 12 that emerge from the ground G
You. An inflow pipe 15 is connected to the dust removal pit 7,
Agricultural chemical waste such as seed cleaning waste is processed through the inlet piping 15.
Flow into the device. The water receiving tank 1 and the dust removal pit 7 communicate with each other through a flow path 17.
The agricultural chemical waste liquid flowing into the dust removal pit 7 passes through the flow path 17.
First, it enters the adjacent water receiving tank 1. Level sensor 2 is provided in the receiving tank 1
0 and a pump 21 are arranged, and the level sensor 20 detects a water receiving tank.
The upper and lower limits of the liquid level of the pesticide waste liquid in 1 are detected,
The pump 21 removes the agricultural chemical waste liquid in the water receiving tank 1 from the adjacent ozone.
It is introduced into the reaction tank 3. In addition, the water receiving tank 1 has an ozone reaction.
The tank 3 communicates with the channel 18 so that the waste liquid in the water receiving tank 1
Even if the limit level is exceeded, waste liquid is
And flows into the ozone reaction tank 3. The ozone reactor 3 has a level sensor 30
Pumps 31, 32, oxidation-reduction potentiometer 35, and inner cylinder 4 for reaction
0 is arranged. The level sensor 30 is an ozone reaction tank
The upper and lower limits of the liquid level of the waste liquid in 3 are detected and the pump
31 sends out the waste liquid in the ozone reactor 3 to the ozone generator 2
The pump 32 uses the waste liquid in the ozone reaction tank 3 as an electrolysis tank.
Introduce to 4. The oxidation-reduction potentiometer 35 is in the ozone reactor 3
The potential of the waste liquid is measured. The inner tube 40 has an ozone generator 2
The waste liquid mixed with ozone is introduced by the
Is for UV irradiation to accelerate the oxidation reaction by ozone
And a titanium film 42 on the inner surface.
Has been established. Combination of UV irradiation and titanium film 42
Is difficult to decompose, especially for trace amounts of pesticide components
Substances or heavy metals or substances that cause mutagen
It is effective at the time of processing. It should be noted that the agrochemical waste liquid and ozone in the inner cylinder 40
The residence time of the gas / liquid mixture should be at least 2 minutes
Is set. This is as described below.
Hydroperoxy radical (HO)_Two·)When,
In addition, the hydroxyl radical (OH.)
It takes at least 2 minutes to generate
It is. Ozone generator 2 having oxygen concentrator 2a
Is an ozone gas-liquid mixing tower 50 and a line as shown in FIG.
It has a pump 51. The ozone gas-liquid mixing tower 50
Waste liquid sent by the pump 31 from the reaction tank 3 is introduced
On the other hand, ozone from the ozone generator 2 is introduced,
Waste liquid and ozone while being pressurized by the line pump 51
Are mixed. In addition, the coagulant is
Into the reaction tank 3. However, it is included in seed disinfection, etc.
The electrolyte may be used as a flocculant. Decomposition and mineralization by oxidation reaction with ozone
The pesticides to be used are, in addition to those mentioned in the experimental examples below,
Chlorine-based, organic phosphorus-based, phenoxy-based, carbamate
System, trizine system, triazole system, dithiocarbamate
And pyrethroids are known. Although not shown in FIG.
An ozone concentration monitoring sensor is arranged around the generator 2.
This ozone concentration monitoring sensor is a predetermined value (0.05 ppm)
When the above ozone concentration is detected, the ozone generator 2
Ozone generation is automatically stopped. The electrolysis tank 4 and the activated carbon tank 5 are shown in FIG.
The structure is as shown in the large diagram. The electrolysis tank 4
Collect the scum generated by the reduction reaction, and remove the scum and liquid.
It has a scum collecting mechanism to separate. The scum collection mechanism
Here, the sprocket provided on the upper part of the electrolysis tank 4
60, a chain 61 hung on a sprocket 60,
A scraper (not shown) attached to the chain 61
A motor 62 for rotating and driving the proket 60, and filtering inside.
It is composed of a net basket 63 having a cloth (not shown). As described above, the electrolysis tank 4
Scum is generated by the
According to the scum that emerged was scraped by a scraper
After being collected and removed from the liquid level of the electrolysis tank 4,
3 A filter cloth is provided in the net basket 63.
Liquid is separated from the scum with a filter cloth
Only will remain on the filter cloth. The electrolytic cell 4 has an anode and a cathode.
However, platinum, titanium, etc. are used as the material of the anode and the cathode.
Can be The anode and the cathode are provided in a fixed form provided in the control panel 6.
It is connected to a current generator 65. Electricity required for electrolysis
For example, DC 24 V, 20 A / m^ThreeAnd electrolysis
(For example, minus 250 mV ORP /
(Retention 30 minutes or more) to mineralize the chemical. Electrical
Well-known coagulation / coagulation and floating by electrolysis in decomposition tank 4
Separation, oxidation / reduction, oil purification, denitrification, phosphorus removal
The effects are obtained, and the respective effects are as follows. <Aggregation / coagulation> When a flocculant is added to the waste liquid and energized,
Charges of pollutants repelling and dispersing each other
The load is neutralized, and pollutants adsorb to each other and aggregate and condense.
Then, the growth of the flock becomes quick. <Floatation> When waste liquid is electrolyzed, water electrolysis occurs.
This generates fine bubbles. These fine bubbles are
Flocculation of flocs is promoted by the
It is. <Oxidation / reduction> When waste liquid is electrolyzed, pollutants are generated at the electrodes.
Decomposition and cathodic reductive decomposition of the waste occur, and B in the waste liquid
In addition to being able to purify OD and COD,
Chromaticity can also be reduced. <Oil purification> Emuljo
Wastewater treatment is generally very difficult
is there. Oil particle size is 10^-7-10^-FourIn cm, minus obi
Electrolysis, the negative charge
Is neutralized and the oil particles grow by adsorption on each other,
Separation and removal are possible. <Denitrification> There are various forms of nitrogen in waste liquid,
Ammoniacal nitrogen is decomposed by the following reaction mechanism:
You. 2NH_Four ⁺+ 2e → N_Two↑ + 4H_Two↑ To theoretically oxidize and decompose 18 g of ammonia ions,
Requires 96500 coulombs (1A, 27 minutes)
is there. <Dephosphorization> Phosphorus ion substance is used as an aggregating agent.
It is floated and separated as phosphate by minium and iron. Al³⁺+ PO_Four ^3-  → AlPO_Four↓ Fe³⁺+ PO_Four ^3-  → FePO_Four↓ On the other hand, the activated carbon tank 5 has a sprinkler 70, an activated carbon layer 71,
It has a stirring blade 72. Processing liquid sent from electrolysis tank 4
Is sprinkled on the activated carbon layer 71 by the sprinkler 70 and the activated carbon layer 7
In the process of passing through 1, the remaining pollutants are
Adsorbed and removed. In addition, the stirring rotating at the bottom of the activated carbon tank 5
There is no variation in the adsorption action of the activated carbon layer 71 by the stirring blade 72.
Stable and stable. The surface of the activated carbon layer 71 is coated with an agrochemical component.
Because a microfiltration membrane is formed, that is, the pesticide component has
Microfloc is formed by the
Thus, the filtration accuracy of the activated carbon is improved. This is a pesticide ingredient
Contains surfactants, metals and organic binders that serve as electrolytes
Most of them have an agglomeration aid during electrolysis reaction.
Self-surfacing, part of which is on the surface of the activated carbon layer 71
Is formed. However, after the electrolysis, the reduced water
Quality, the zeta potential of the filtration membrane is strong
Activated carbon is easily clogged. Prevent this
Activated carbon after treatment of pesticide waste liquid or after setting
Backwash more, and this backwash wastewater is again subjected to oxidation and reduction reactions.
And lift the scum generated by electrolysis to separate and remove
It may be left. FIG. 4 shows a specific example of the back washing.
Water supply and blower 75 required
The amount of air is injected and the upper part of the activated carbon layer 71 of the activated carbon tank 5
The scum is washed away, and the washing water is supplied to the ozone reaction tank 3 or the electric
Return to the decomposition tank 4 and again electrolysis in the electrolysis tank 4
Perform scum removal. In the backwashing process, the pesticide waste liquid is continuously treated.
Automatically set to be performed at regular intervals.
Good. In the processing apparatus configured as described above, the pesticide
The waste liquid flows into the dust removal pit 7 through the inflow pipe 15,
After the soil, rice hulls, trash, etc. are removed, water is received from channel 17
Enter tank 1. In the receiving tank 1, the level sensor 20 particularly measures the liquid level.
Level is constantly detected, so the liquid level
If it is not less than the lower limit, the agricultural chemical in the water receiving tank 1 by the pump 21
The waste liquid is sucked up and introduced into the ozone reaction tank 3. Oh
The liquid level is detected by the level sensor 30 even in the zon reaction tank 3.
The liquid level has reached the required volume above the lower limit level.
Until the waste liquid for agrochemicals is stored in the ozone reaction tank 3. A required amount of the agricultural chemical waste liquid is stored in the ozone reactor 3.
And the agrochemical waste liquid in the ozone reactor 3 is turned on by the pump 31.
Introduced into the gas-liquid mixing column 50 and manufactured by the ozone generator 2
The injected ozone is injected into the ozone gas-liquid mixing tower 50
Then, the pesticide waste liquid and ozone are mixed in the ozone gas-liquid mixing tower 50 for 2 seconds.
After contact, the gas-liquid is transferred to the reaction inner cylinder in the ozone reaction tank 3.
40 is introduced. Gas and liquid stay in the inner cylinder 40 for more than 2 minutes
In the meantime, ultraviolet irradiation from the lamp 41 and the titanium film 4
2 promotes oxidation reaction with ozone
It is. That is, in the inner cylinder 40, the pesticide waste liquid and the ozone
In the residence reaction with
Siradical (HO_Two・) And also a hydro-
2 minutes or more for generating xyl radical (OH.)
After a reaction time of at least 2 kg / cm^TwoPressurized
Under the circumstances, the chemical substances contained in the pesticide waste liquid are mineralized.
During the oxidation reaction with ozone,
A coagulant is charged into the ozone reaction tank 3 from the collection container 8. The oxidation reaction by ozone proceeds to some extent
And the agrochemical waste liquid in the ozone reaction tank 3 is
It is sent to the gas decomposition tank 4. In the electrolysis tank 4, electrolysis is performed.
The reduction reaction takes place with the generation of gas as described above.
The scum rises. The scum that emerged is scraper
Raked, put into a net basket 63, and filtered with a filter cloth
The scum and liquid are separated and the scum remains on the filter cloth. filtration
Liquids that have been filtered through a cloth or that have been electrolyzed
And returned to the inner cylinder 40 in the ozone reaction tank 3 and mixed with ozone gas and liquid.
The tower 50, the inner cylinder 40 and the electrolysis tank 4 are circulated. The oxidation reaction with ozone is carried out in the ozone reactor 3
The potential is measured by the oxidation-reduction potentiometer 35 arranged in the
The potential is constant oxidation between two points of redox.
This is performed until the potential is reached. This oxidation potential is processed
Depending on the pesticide waste liquid, one example is Sportac
With Turner + SE (product name), at +250 mV (upper limit)
Yes, if electrometer 35 measures 250 mV, oxidation reaction
To end. This oxidation reaction and reduction reaction produce pesticide waste liquid.
70-99% of the pollutants therein are removed. When the ozone oxidation reaction ends, that is, the ozone
When the supply of the liquid to the liquid mixing tower 50 is completed,
The liquid is sent to the electrolysis tank 4 sequentially, and the scum is formed by electrolysis.
The treated water whose removal has been completed is sent to the activated carbon tank 5. Activated carbon
In the tank 5, the treated water passes through the activated carbon layer 71 while remaining.
The existing pollutants are adsorbed and removed by the activated carbon and stirred by the stirring blade 72.
After the substrate has been stirred and the substrate is constantly constant, release it (in the direction of the arrow).
Is done. Removal of residual chemicals in activated carbon tank 5
As a result, a pollutant removal rate of 99% can always be maintained. Immediately
The pollutant removal rate by the ozone reaction and electrolysis
Even if it is 70%, it is finally removed by the activated carbon tank 5.
The departure rate will always reach 99%. The treatment of the pesticide waste liquid in the ozone reaction tank 3 is completed.
When the liquid level reaches the lower limit level,
Pesticide waste liquid is again introduced into the ozone reactor 3 to a certain level
Oxidation by ozone and electrolysis
Primary reaction is performed, followed by adsorption removal with activated carbon
It is. This series of processing is performed by the liquid level of the agricultural chemical waste liquid in the water receiving tank 1.
As long as the level is equal to or higher than the lower limit, the processing is sequentially continued. The processing apparatus according to the above-described embodiment includes a water receiving tank 1 and
Ozone reactor 3 is a large one installed underground,
If the processing capacity may be small, refer to FIG.
6 (a front view as viewed from an arrow A in FIG. 5), FIG. 7 (an arrow in FIG. 5).
B (right side view as viewed from B), FIG. 8 (back view as viewed from arrow C in FIG. 5).
Each part can be unitized as shown in
You. In this unitized processing apparatus, the base 80
, Ozone generator 2 (including control panel 6), ozone reactor
3, electrolysis tank 4, activated carbon tank 5 with ladder 77
Have been. The base 80 includes casters 81 and support legs 82.
Movement of unitized processing equipment by casters 81
Is easy, and the unitized processing device is
It can be fixed in place. In addition, this unit
In a chemical treatment device, an agrochemical waste liquid is subjected to an ozone reaction using a pipe or the like.
It is introduced directly into the tank 3. Next, the agricultural chemical waste liquid is treated by using the above-described processing apparatus.
An experimental example of mineralizing is described. However, the following
In Experimental Examples 1 to 6, all were performed by high-performance liquid chromatography.
(HPLC) and infrared spectrophotometry (JR)
The structure of the product was deduced. Also, use pure products for pesticide component reagents.
Prepared and confirmed the results. <Experimental example 1> The pesticide to be treated is Techlead wettable powder
Mixed solution of Emulsion and Sumithion emulsion (both brand names)
Liquid), by oxidation reaction with ozone and electrolysis
After performing the reduction reaction and the adsorption removal with activated carbon,
Hands to prove whether the treated water has reached the wastewater standard
As a stage, confirm by simple COD reaction (pack test)
Was. However, for restricted substances, bio-consent
Pesticide detection kit using lator method (Wako Pure Chemical Industries, Ltd.)
May be used. The components of pesticides and measurement results are as follows.
It is a cage. -Techlead wettable powder (ipconazole: 5.0%, cupric hydroxide: 3.0%,                     (Water / surfactant: 90.4%) ・ Sumithion emulsion (MEP emulsion: 50%, organic solvent and emulsifier: 50%)Seed disinfectant Techlead Sumithion undiluted solution 1 time pickling water 2 time pickling water Ipconazole 120mg / l ND ND Fenitrothion 110mg / l ND 0.08mg / l COD 800mg / l 31mg / l BOD 120mg / l 22mg / l In these results, ND represents less than the detection limit value,
・ Two times of pickling water is for seeds with pesticides once and twice.
Means water after being immersed only in water.
the same). <Experimental example 2> Healthy seed wettable powder and Sumithion as pesticides
Perform processing using a mixed solution of emulsion (trade name), and
It was confirmed by an easy COD reaction. ・ Helsede wettable powder (thiuram: 26%, pefurazoate: 16%, water / surfactant)                     (Active agent: 58%) ・ Sumithion emulsion (MEP emulsion: 50%, organic solvent and emulsifier: 50%)Seed disinfectant Dilution stock solution of Helseed Sumithion 1 time pickling water 2 time pickling water Thiuram ND ND Fenitrothion 100mg / l ND 0.08mg / l COD 500mg / l 22mg / l BOD 120mg / l 8mg / l <Experimental example 3> Benrate (trade name) of pesticide 200 times
Dilute to use as a seed disinfectant solution.
200 l was subjected to an oxidation reaction and a reduction reaction for about 60 minutes.
Was. The components and results of benlate are as follows. Benlate (thiuram: 20%, benomyl: 20%, mineral fine powder: 60%,             Wettable powder, powder)Seed disinfectant Benlate diluted stock solution Treated water Benomyl 110mg / l 0.02mg / l <Experimental example 4> 1000 times of Daconil (trade name) of pesticide
And used for seed disinfectant, and waste liquid after seed disinfection
Only 200 l are subjected to oxidation reaction and reduction reaction for about 60 minutes.
I let you. The components and results of daconil are as follows. -Daconil (TPN: 40%: surfactant: 60%, wettable powder, flowable,               liquid)Seed disinfectant Daconil diluted stock solution Treated water Chlorothalonil (TPN) 89mg / l 0.08mg / l <Experimental example 5> 1000 pesticides (trade name) of pesticide
Diluted by a factor of 2 to use as a seed disinfectant solution
Oxidation reaction and reduction of 200 l of liquid for 1.5 to 5 hours
The reaction was performed, and the results are as follows. ・ Sportac (Prochloraz: 25%, water / organic solvent 75%, liquid)Seed disinfectant Spoltac stock solution Prochloraz 76mg / l ND <Experimental example 6> Dakolate (trade name) of pesticide was increased 1000 times.
And used for seed disinfectant, and waste liquid after seed disinfection
Only 200 l are subjected to oxidation and reduction reactions for 4.5 hours.
I let you. The components and results of dacolate are as follows. ・ Dakolate (TPN: 50%, Benomyl: 20%, Mineral powder ・ Surfactant               : 30%, wettable powder)Seed disinfectant Dakolate diluted stock solution Treated water Chlorothalonil (TPN) 390 mg / l 0.1 mg / l Benomyl 200mg / l 0.06mg / l As is clear from any of Experimental Examples 1 to 6,
The concentration has been greatly reduced by using the device.
This shows that the pesticide waste liquid can be mineralized. From the results of these experiments, the following features
Can be derived. Trifmin te
Creed C. Sumithion Saturn Dakorate Beno
For mill, 0.1 mg of seed disinfectant pesticide component after treatment
/ L can be determined. Techlead (Floable / Copper oxide) / Sporttac milk
Agent, Starner wettable powder, Healthy seed emulsion, Benlate T
(Thiuram), combined use of complex decomposition technology and scum
Removal is important. Benrate has an increased foaming property due to ozone oxidation. Sportac (Prochloraz liquid)
Finally, the emulsion disappears and the visibility improves. <Experimental example 7> The following seed disinfecting waste liquid in a paddy rice raising facility
Against oxidation reaction with ozone and reduction reaction by electrolysis
This shows the results of the treatment in which the chemical substance was mineralized. However, processing
The amount is 5m^ThreeIt is.Product name/ Pesticide ingredient name Stock solution Ozone electrolytic floatation Removal rate Addition of flocculant Removal rate After activated carbonTacolate  /  Chlorothalonil (TPN) 0.94mg / l 0.40mg / l (2hr) 57% 0.80mg / l Note 2 ND tacolate  /  Hexnomyl 1.3mg / l 0.70mg / l 〃 46% 0.80mg / l Note 2 ND stirrer  SE ／  Oxonic acid 130mg / l 110mg / l 〃 15% 82mg / l 37% ND swelltac emulsion/  Fluorochlors 34mg / l 15mg / l 56% 14mg / l 59% ND COD (Mn) 500mg / l 340mg / l 〃 32% 350mg / l Note 3 6mg / l BOD 120mg / l 130mg / l 〃 Note 1 110mg / l 15% 2mg / l Turbidity 800mg / l 560mg / l 〃 30% 120mg / l 85% ND hexane Extracted substance amount ND ND In this paddy rice nursery, Sportac Sta
Dakolate was used for sterilization of nursery shelves.
Sportac (Base is prochloraz: 25%, water / organic
(Solvent: 75%, liquid) diluted 1000 times
Prochloraz concentration index is estimated to be about 76 mg / l
Can be However, the analytical value of the above result is 34 mg / l
Therefore, the concentration of 2200 times the dilution factor
I have. The above analysis values indicate that the highest concentration of facility wastewater has been treated.
And the actual situation is a concentration of 4000 to 8000 times
It is appropriate to consider the wastewater quality (raw water). Removal rate with ozone electrolysis reaction time of 2 hours
Is 57% chlorothalonil, 46% benomyl,
Raz 56%
improves. Removal of oxonic acid depends on the effect of coagulant injection.
It's a big thing to expect, but Spoltak Stana
-There is an electrolyte contained in the SE base.
Amount is fine. The BOD in Note 1 is obtained by decomposition of COD (Mn).
Increased by the resulting substrate conversion. BOD is the reaction of flocculant
The effect is great due to the floating process. The chlorothalonil and benomyl in Note 2 are
Improvement of removal rate by flocculant after electrolytic levitation cannot be expected
No. Note 3 COD (Mn) is also removed by a coagulant
No improvement in rate is expected. COD (Mn) reaction for 2 hours with ozone electrolytic levitation
The response efficiency is (5m^Three× 500mg / l-5m^Three× 340mg / l) ÷ 40g
/ Ozone = 20 Becomes Therefore, COD (Mn) 20 is a proportional meter of ozone.
Calculation is possible, (5m^Three× 340mg / l) ÷ 20 = 85
Decomposition is completed by g / ozone proportional injection reaction
You. <Experimental example 8> Seed disinfection in the following paddy rice raising facilities
Oxidation reaction with wastewater and return by electrolysis
The result of the treatment in which the chemical substance was mineralized by the original reaction is shown. However,
Processing volume is 2m^ThreeIt is.Product name/ Pesticide ingredient name Stock solution Ozone electrolytic floatation Removal rate Addition of flocculant Removal rate After activated carbonPay rate  /  Hepnomyl 0.04mg / l ND (2hr) 100% ND 100% ND techrete  / IFCONASOLE 31mg / l 16mg / l 〃 48% 5.8mg / l 81% ND COD (Mn) 330mg / l 220mg / l 〃 33% 130mg / l 61% 25mg / l BOD 170mg / l 140mg / l 〃 18% 63mg / l 63% 1mg / l Turbidity 160mg / l 100mg / l 〃 38% 70mg / l 56% ND hexane Extracted substance amount 11mg / l ND In this paddy rice raising facility, Techlead is treated as the main agent for disinfection.
The effect was confirmed. Techlead wettable powder (Ipconazo
: 5.0%, cupric hydroxide: 3.0%, water / surface activity
(Mixing agent: 90.4%) diluted 200 times
The conazole concentration index is considered to be around 120 mg / l. I
However, the analytical value of the above result is 31 mg / l,
A concentration of 800 times the dilution factor is targeted for processing. Removal rate with ozone electrolysis reaction time of 2 hours
Must be 48% ipconazole and 100% benomyl
Thus, the removal rate improves with time. The removal of ipconazole is carried out by cupric hydroxide.
3.0% influence, ozone electrolytic levitation removal rate is 48%
It was about. The removal rate after coagulant injection is 81%.
The reason is that cupric hydroxide is an electrolyte and has a floating effect.
The fruit is accelerating. COD (Mn) reaction for 2 hours with ozone electrolytic levitation
The response efficiency is (2m^Three× 330mg / l-2m^Three× 220mg / l) ÷ 40g
/Ozone=5.5 And by the coagulant combination effect, (2m^Three× 330mg / l-2m^Three× 130mg / l) ÷ 40g
/ Ozone = 10 Becomes Therefore, COD (Mn) 10 is a proportional meter of ozone.
Calculation is possible, (2m^Three× 130mg / l) ÷ 10 = 26
g / ozone can be removed by a proportional injection reaction.
You. When benlate is used as the main disinfectant, the dilution factor is
Even with disinfection waste liquid with a rate of 200 times, the actual situation is about 800 times
And the 200 times benomyl index concentration is 11
Since it is 0 mg / l, 27.5 at 800-fold dilution ratio.
mg / l is possible. The above mass indicates the oxidation reaction, reduction reaction and
And can be removed by adding a flocculant. Next, the sludge generated in the treatment of the seed disinfection waste liquid
Is described. In the case of the paddy rice nursery facility of Experimental Example 7, disinfection was performed.
Since the main agent is Spoltak Starner SE,
The conditions are as follows. Wastewater amount during the period = 140 m^Three× 210mg / l
(Mixed mass of COD and BOD) ¥ 29.4kg SS amount at a water content of 97% = 29.4 kg / day x 100 / (1
00-97) ¥ 980l (sludge water amount) And re-agglomeration by scum removal, water content is 70% or less
Becomes 29.4 kg / day × 100 / (100-7
0) = 97 kg (sludge water amount) (80 kg at waste collection) In the case of the paddy rice nursery facility of Experimental Example 8, the main disinfectant was
Since it is a Venrate, the load conditions are as follows. Wastewater amount during the period = 130 m^Three× 180mg / l
(Mixed mass of COD and BOD) ≒ 23.4kg SS content at a water content of 97% = 23.4 kg / day x 100 / (1
00-97) $ 780l (sludge water volume) And re-agglomeration by scum removal, water content is 70% or less
Becomes 23.4 kg / day × 100 / (100-7
0) = 77 kg (sludge water amount) (50 kg at waste collection) Further, as another experiment, for each waste liquid (stock solution),
The next step is that the chemical substances of the components are mineralized
The results are shown below. <Experimental example 9> Undiluted solutionInspection item Weighing value Lower limit of quantification Weighing method   Chlorothalonil (TPN) 0.94 mg / l 0.01 mg / l JIS K 0128 16.2   Benomyl 1.3mg / l 0.01mg / l JIS K 0128 compliant   Oxonic acid 130mg / l 0.01mg / l HPLC method   Prochloraz 34mg / l 0.01mg / l gas chromatograph mass spectrometry Method COD (Mn) 500 mg / l 1 mg / l JIS K 0102 17   BOD 120mg / l 1mg / l JIS K 0102 21 32.3   Turbidity 800 degrees 1 degree Water supply test method VI-1 3.3 Ozone electrolytic levitation 2 hoursInspection item Weighing value Lower limit of quantification Weighing method   Chlorothalonil (TPN) 0.40mg / l 0.01mg / l JIS K 0128 16.2   Benomyl 0.70mg / l 0.01mg / l JIS K 0128 compliant   Oxonic acid 110mg / l 0.01mg / l HPLC method   Prochloraz 15mg / l 0.01mg / l gas chromatograph mass spectrometry Method COD (Mn) 340mg / l 1mg / l JIS K 0102 17   BOD 130mg / l 1mg / l JIS K 0102 21 32.3   Turbidity 560 degrees 1 degree Water supply test method VI-1 3.3 Add flocculantInspection item Weighing value Lower limit of quantification Weighing method   Chlorothalonil (TPN) 0.80 mg / l 0.01 mg / l JIS K 0128 16.2   Benomyl 0.80 0.01 Conforms to JIS K 0128   Oxonic acid 82 0.01 HPLC method   Prochloraz 14 0.01 Gas chromatograph Mass spectrometry Method COD (Mn) 350mg / l 1mg / l JIS K 0102 17   BOD 110mg / l 1mg / l JIS K 0102 21 32.3   Turbidity 120 ° 1 ° Water test method VI-1 3.3 Activated carbon treatmentInspection item Weighing value Lower limit of quantification Weighing method   Chlorothalonil (TPN) ND 0.01mg / l JIS K 0128 16.2   Benomyl ND 0.01 Conforms to JIS K 0128   Oxonic acid ND 0.01 HPLC method   Prochloraz ND 0.01 Gas chromatograph Mass spectrometry Method COD (Mn) 6mg / l 1mg / l JIS K 0102 17   BOD 2mg / l 1mg / l JIS K 0102 21 32.3   Turbidity ND 1 degree Clean water test method VI-1 3.3 Undiluted solutionInspection item Weighing value Lower limit of quantification Weighing method   Hexane extractables ND 5 mg / l Notification of the Environment Agency in 1974                                                     No. 64 Appendix 4 Discharge waterInspection item Weighing value Lower limit of quantification Weighing method   Hexane extractables ND 5 mg / l Notification of the Environment Agency in 1974                                                     No. 64 Appendix 4 <Experimental example 10> Undiluted solutionInspection item Weighing value Lower limit of quantification Weighing method   Benomyl 0.04mg / l 0.01mg / l JIS K 0128 compliant   Ipconazole 31mg / l 0.05mg / l HPLC method   COD (Mn) 330 mg / l 1 mg / l JIS K 0102 17   BOD 170mg / l 1mg / l JIS K 0102 21 32.3   Turbidity 160 ° 1 ° Water test method VI-1 3.3 Ozone electrolytic levitation 2 hoursInspection item Weighing value Lower limit of quantification Weighing method   Benomyl ND 0.01mg / l JIS K 0128 compliant   Ipconazole 16mg / l 0.05mg / l HPLC method   COD (Mn) 220 mg / l 1 mg / l JIS K 0102 17   BOD 140mg / l 1mg / l JIS K 0102 21 32.3   Turbidity 100 ° 1 ° Water supply test method VI-1 3.3 However, the processing time for COD (Mn), BOD and turbidity is 1 hour. Add flocculantInspection item Weighing value Lower limit of quantification Weighing method   Benomyl ND 0.01mg / l JIS K 0128 compliant   Ipconazole 5.8mg / l 0.05mg / l HPLC method   COD (Mn) 130 mg / l 1 mg / l JIS K 0102 17   BOD 63mg / l 1mg / l JIS K 0102 21 32.3   Turbidity 70 degrees 1 degree Water supply test method VI-1 3.3 Activated carbon treatmentInspection item Weighing value Lower limit of quantification Weighing method   Benomyl ND 0.01mg / l JIS K 0128 compliant   Ipconazole ND 0.05mg / l HPLC method   COD (Mn) 25 mg / l 1 mg / l JIS K 0102 17   BOD 1mg / l 1mg / l JIS K 0102 21 32.3   Turbidity ND 1 degree Clean water test method VI-1 3.3 Undiluted solutionInspection item Weighing value Lower limit of quantification Weighing method   Hexane-extracted substance amount 115 mg / l Notification of the Environment Agency in 1974                                                     No. 64 Appendix 4 Discharge waterInspection item Weighing value Lower limit of quantification Weighing method   Hexane extractables ND 5 mg / l Notification of the Environment Agency in 1974                                                     No. 64 Appendix 4 [0069] As described above, the present inventionPlaceEquipment
According toWater receiving tank, ozone reaction tank, ozone generator, electricity
Equipped with a decomposition tank and an activated carbon tank, using these components
Perform waste liquid treatmentTherefore, the following effects can be obtained. (1AgricultureMineralize chemicals contained in chemical wastewater in a short time
Can remove 70-99% of pollutants
Can be. (2) Easy to decompose, especially for trace amounts of pesticide components
Substances that have properties, heavy metals, or substances that cause mutagenesis
Effective in quality processing. As described above, the present inventionPlaceUsing the
For example, compared to the conventional coagulation and sedimentation treatment by adding a large amount of drug
It does not require specialized knowledge such as setting the amount of drug input,
Facility cost reduction, running cost reduction, human
Various methods such as labor saving of management and distribution of well-balanced mechanical efficiency
Excellent benefits. Also, the liquid after treatment is sufficiently safe.
To the extent that it has been mineralized and purified,
Can be released into rivers and seas or reused
Safe and secure for living organisms, including humans, and the environment.
You. Therefore, the use of the present invention is a
Treatment of liquid immersion waste liquid, treatment of bulb disinfection waste liquid, potato
Treatment of seed potato disinfecting waste liquid, treatment of pesticide waste liquid used at golf courses
Treatment of residual liquid for spraying agricultural chemicals and washing water for spraying equipment,
Removal of endocrine disrupting substances, wastewater treatment of hydroponics
Conversion of hardly decomposable substances to easily decomposable, etc.
It is extremely useful for environmental protection.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic overall structural diagram of a processing apparatus according to one embodiment. FIG. 2 is an enlarged view of a water receiving tank, an ozone reaction tank, and a dust removing pit in the processing apparatus. FIG. 3 is an enlarged view of an ozone generator in the processing apparatus. FIG. 4 is an enlarged view of an electrolysis tank and an activated carbon tank in the processing apparatus. FIG. 5 is a plan view of a processing apparatus in which each unit of the processing apparatus is unitized. FIG. 6 is a front view as viewed from an arrow A in FIG. 5; FIG. 7 is a right side view as viewed from an arrow B in FIG. 5; FIG. 8 is a rear view as viewed from an arrow C in FIG. 5; [Description of Signs] 1 Water receiving tank (liquid storage tank) 2 Ozone generator 2a Oxygen concentrator 3 Ozone reaction tank 4 Electrolysis tank 5 Activated carbon tank 6 Control panel 7 Dust removal pit 8 Coagulant container 40 Reaction inner cylinder 41 Ultraviolet irradiation Lamp

────────────────────────────────────────────────── ─── front page continued (51) Int.Cl. ⁷ identifications FI C02F 9/00 502 C02F 9/00 502M 502N 502R 502Z 503C 503 504E 504 G01N 27/26 361G G01N 27/26 361 33/18 D 27 / 416 104 33/18 C02F 1/46 101C 104 G01N 27/46 341N (72) Inventor Hiroshi Nishikori 1-2-2, Izumo-cho, Neyagawa-shi (56) References JP-A-5-317870 (JP, A) JP-A-5-317870 7-185576 (JP, A) JP-A-2-222774 (JP, A) JP-A-53-7593 (JP, A) JP-B-57-14235 (JP, B2)

Claims (1)

(57) [Claims] [Claim 1] Water receiving tank, ozone reaction tank, ozone generator, power supply
The apparatus has a gas decomposition tank and an activated carbon tank, and the water receiving tank is provided with a pesticide waste liquid flowing from outside the apparatus.
The level sensor that detects the liquid level and the level
Introduce waste pesticide into the ozone reactor when it is above a certain level
A pump, and the ozone reaction tank is configured to receive the pesticide waste liquid introduced from the water receiving tank.
A level sensor that detects the liquid level and the pesticide waste from the tank
A first pump for delivering liquid to the ozone generator;
A second pump for introducing the pesticide waste liquid into the electrolysis tank,
Is opened, a titanium film is formed on the inner surface and ultraviolet
Reaction inner cylinder equipped with a lamp for X-ray irradiation and pesticide in the tank
It has an oxidation-reduction potentiometer that measures the oxidation-reduction potential of the waste liquid.
The ozone generator is operated by a first pump of an ozone reaction tank.
Of the pesticide waste liquid sent out and the ozone while pressurizing
An ozone gas-liquid mixing tower, wherein the electrolysis tank is operated by a second pump of the ozone reaction tank.
Collect the scum generated by the reduction reaction of the sent pesticide waste liquid.
The activated carbon tank has a scum collection mechanism for collecting and separating scum and liquid, and the activated carbon tank is used for processing liquid sent from the electrolysis tank.
It removes the remaining pollutants by adsorption, and wastes pesticide sent from the receiving tank to the ozone reaction tank.
When more than a predetermined amount is accumulated in the reaction tank,
Pumped into the ozone gas-liquid mixing tower of the ozone generator
After pressurizing and mixing with ozone, the gas-liquid mixture is
Introduce from the top of the reaction inner cylinder in the reaction tank, and open through the lower opening.
Do not stay in the inner cylinder for a predetermined time until the
The first stage of irradiating ultraviolet rays in the inner cylinder, and the liquid in the ozone reaction tank measured by an oxidation-reduction potentiometer
After the oxidation reaction with ozone proceeds based on the oxidation potential of
Then, the agricultural chemical waste liquid in the ozone reaction tank is
It is sent to the gasification tank sequentially, and is produced by the reduction reaction in the electrolysis tank.
The scum is removed by the scum collection mechanism, and electrolysis treatment is performed.
The used liquid is introduced again into the reaction inner cylinder in the ozone reaction tank.
And an ozone gas-liquid mixing tower, inner cylinder and electric
The second stage of circulating the decomposition tank and the liquid in the ozone reaction tank measured by the redox potentiometer
The oxidation potential of the product to the specified value set for each pesticide waste liquid.
If the oxidation reaction with ozone is terminated,
The liquid is sequentially sent to the electrolysis tank, and
The treated water from which the water has been removed is sent to the activated carbon tank and
The third stage of adsorbing and removing existing pollutants before releasing
A pesticide waste liquid treatment apparatus , characterized in that it is configured to perform the following .