JP4949742B2 - Waste water treatment method and waste water treatment equipment - Google Patents

Description

  The present invention relates to a wastewater treatment method and a wastewater treatment apparatus not only in a semiconductor factory and a liquid crystal factory but also in a factory that manufactures or uses an organic fluorine compound.

  Organic fluorine compounds are chemically stable substances. In particular, the organic fluorine compounds have excellent properties from the viewpoints of heat resistance and chemical resistance, and are therefore used for applications such as surfactants.

However, since the organic fluorine compound is a chemically stable substance, it is difficult to be decomposed by microorganisms. For example, perfluorooctasulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) as the organic fluorine compounds are concerned about the influence on the ecosystem because degradation in the ecosystem does not proceed. That is, since the perfluorooctasulfonic acid (PFOS) and the perfluorooctanoic acid (PFOA) are chemically stable, a high temperature of about 1000 ° C. or higher is required for thermal decomposition (JP-A-2001 2001). -302551 gazette: refer patent document 1).
JP 2001-302551 A

  Then, the subject of this invention is providing the waste water treatment method and waste water treatment apparatus which can decompose | disassemble a hardly decomposable organic fluorine compound effectively with microorganisms.

In order to solve the above problems, the wastewater treatment method of the present invention is:
Wastewater containing an organic fluorine compound and an organic substance is discharged into a first micro / nano bubble generation tank, a first microorganism treatment section, a second micro / nano bubble generation tank, a second microorganism treatment section, a third micro / nano bubble generation tank, and a third microorganism treatment section. , Introducing in order,
To the second micro-nano bubble generation tank and the third micro-nano bubble generation tank, microorganisms, nutrients and micro-nano bubble generation aids are added,
In the first micro / nano bubble generation tank, the second micro / nano bubble generation tank, and the third micro / nano bubble generation tank, the waste water contains micro / nano bubbles,
In the first microorganism treatment section, the second microorganism treatment section, and the third microorganism treatment section, the organic fluorine compound and the organic matter in the waste water are decomposed by the microorganism.

  Here, the micro-nano bubble refers to a bubble having a diameter of about 10 μm to several hundred nm. The above-mentioned micro / nano bubble generation aid means one that can stably maintain the generation state of micro / nano bubbles. The said nutrient is a nutrient required when microorganisms are activated. Examples of the organic fluorine compound include perfluorooctasulfonic acid (PFOS), perfluorooctanoic acid (PFOA), and perfluorinated alkyl sulfonates (PFAS).

  According to the waste water treatment method of the present invention, the organic fluorine compound and the organic matter in the waste water are decomposed by the microorganisms in the first microorganism treatment unit, the second microorganism treatment unit, and the third microorganism treatment unit. Therefore, the waste water can be treated with the microorganisms in three stages, and the efficiency of the waste water treatment can be improved.

  Further, in the first micro-nano bubble generation tank, the second micro-nano bubble generation tank, and the third micro-nano bubble generation tank, since the drainage contains micro-nano bubbles, even if the micro-nano bubbles are consumed by aerobic microorganisms. Since it is replenished each time, the micro-nano bubbles can be used effectively, and the microorganisms propagated in the first microorganism treatment unit, the second microorganism treatment unit, and the third microorganism treatment unit can be activated.

  In addition, since microorganisms, nutrients, and micro-nano bubble generation assistants are added to the second micro-nano bubble generation tank and the third micro-nano bubble generation tank, the first microorganism treatment unit, the second microorganism treatment unit, and the second 3 The microorganisms in the microorganism treatment section can be further activated, and the decomposition efficiency of the organic fluorine compound and the organic matter in the waste water can be improved.

  Therefore, the hardly decomposable organic fluorine compound (for example, perfluorooctasulfonic acid (PFOS), perfluorooctanoic acid (PFOA), perfluorinated alkyl sulfonates (PFAS)) contained in the waste water is effectively removed by microorganisms. Can be disassembled.

Moreover, the wastewater treatment apparatus of the present invention is
A first microorganism treatment unit, a second microorganism treatment unit, which are connected in series and sequentially introduce wastewater containing an organic fluorine compound and an organic substance, and contain microorganisms that decompose the organic fluorine compound and the organic substance in the wastewater; A third microbial treatment section;
A first micro / nano bubble generation tank connected to the upstream of the first microorganism treatment unit and containing a micro / nano bubble generator;
A second micro / nano bubble generating tank connected between the first microorganism processing unit and the second microorganism processing unit and containing a micro / nano bubble generator;
A third micro / nano bubble generating tank connected between the second microorganism processing unit and the third microorganism processing unit and containing a micro / nano bubble generator;
The second micro-nano bubble generation tank and the third micro-nano bubble generation tank are characterized by being added with the microorganism, a nutrient for the microorganism, and a micro-nano bubble generation aid.

  Here, the micro-nano bubble refers to a bubble having a diameter of about 10 μm to several hundred nm. The above-mentioned micro / nano bubble generation aid means one that can stably maintain the generation state of micro / nano bubbles. The said nutrient is a nutrient required when microorganisms are activated. Examples of the organic fluorine compound include perfluorooctasulfonic acid (PFOS), perfluorooctanoic acid (PFOA), and perfluorinated alkyl sulfonates (PFAS).

  According to the wastewater treatment apparatus of the present invention, since the first microorganism treatment unit, the second microorganism treatment unit, and the third microorganism treatment unit are included, the wastewater treatment with the microorganisms can be performed in three stages. The processing efficiency can be improved.

  In addition, since the first micro-nano bubble generation tank, the second micro-nano bubble generation tank, and the third micro-nano bubble generation tank are provided, even if the micro-nano bubbles are consumed by aerobic microorganisms, they are replenished each time. The micro-nano bubbles can be used effectively, and the microorganisms propagated in the first microorganism treatment unit, the second microorganism treatment unit, and the third microorganism treatment unit can be activated.

  In addition, the second micro-nano bubble generation tank and the third micro-nano bubble generation tank are added with the microorganism, a nutrient for the microorganism, and a micro-nano bubble generation aid, so that the first microorganism treatment unit, The microorganisms in the second microorganism treatment unit and the third microorganism treatment unit can be further activated, and the decomposition efficiency of the organic fluorine compound and the organic matter in the waste water can be improved.

  Therefore, the hardly decomposable organic fluorine compound (for example, perfluorooctasulfonic acid (PFOS), perfluorooctanoic acid (PFOA), perfluorinated alkyl sulfonates (PFAS)) contained in the waste water is effectively removed by microorganisms. Can be disassembled.

  In one embodiment of the waste water treatment apparatus, the organic fluorine compound is perfluorooctasulfonic acid (PFOS) or perfluorooctanoic acid (PFOA).

  According to the wastewater treatment apparatus of this embodiment, since the organic fluorine compound is perfluorooctasulfonic acid or perfluorooctanoic acid, the organic fluorine compound that is a problem from the viewpoint of environmental pollution can be decomposed.

Moreover, in the wastewater treatment apparatus of one embodiment,
The first microorganism treatment unit has a first microorganism tank that houses an air lift pump,
The second microorganism treatment unit has a second microorganism tank that houses an air lift pump,
The third microbial treatment section has an activated carbon tower that stores activated carbon.

  According to the waste water treatment apparatus of this embodiment, the first microorganism treatment unit has a first microorganism tank that houses an air lift pump, and the second microorganism treatment unit contains a second microorganism that houses an air lift pump. Since it has a tank, the agitation circulation of the first microbial treatment unit and the second microbial treatment unit can be performed by the air lift pump, and energy saving can be achieved as compared with the aeration type agitation. Moreover, since the activated carbon tower is in the final stage, the waste water can be treated reliably.

In the wastewater treatment apparatus of an embodiment, the first microorganism tank separates the microorganisms from the wastewater and guides the wastewater to a second micro-nano bubble generation tank on the downstream side of the first microorganism tank. Have

According to the waste water treatment apparatus of this embodiment, the first microorganism tank separates the microorganisms from the waste water and guides the waste water to the second micro-nano bubble generation tank on the downstream side of the first microorganism tank. Therefore, the concentration of the microorganisms in the first microorganism tank can be increased, and the treatment of the waste water can be stabilized.

Moreover, in the wastewater treatment apparatus of one embodiment,
The second microbial tank has, in order from the top to the bottom, a watering tank part, a watering part and an immersion part,
The water spray part and the immersion part have activated carbon,
The waste water in the immersion part is introduced into the watering tank part by the air lift pump, and is sprayed from the watering tank part to the water spraying part and the immersion part by gravity.

  According to the wastewater treatment apparatus of this embodiment, the water sprayed part and the immersion part have activated carbon, and the wastewater in the immersion part is introduced into the watering tank part by the air lift pump, and gravity Therefore, the activated carbon contained in the water spray part and the immersion part reasonably adsorbs the organic fluorine compound in the waste water. Thus, the activated microorganisms propagated on the activated carbon can efficiently decompose the organic fluorine compound.

  Moreover, in the waste water treatment apparatus of one Embodiment, the said activated carbon is accommodated in the net bag.

  According to the waste water treatment apparatus of this embodiment, since the activated carbon is accommodated in the mesh bag, the activated carbon can be easily accommodated in the second microorganism tank together with the mesh bag.

  Moreover, in the waste water treatment apparatus of one Embodiment, it has the filtration tower connected to the upstream of the said activated carbon tower.

  According to the wastewater treatment apparatus of this embodiment, since it has a filtration tower connected to the upstream side of the activated carbon tower, floating substances adhering to the surface of the activated carbon of the activated carbon tower can be removed by the filtration tower, The adsorption performance of the activated carbon can be improved.

  Moreover, in the waste water treatment apparatus of one Embodiment, the said 3rd micro nano bubble generation tank is arrange | positioned between the said filtration tower and the said activated carbon tower.

  According to the waste water treatment apparatus of this embodiment, since the third micro / nano bubble generation tank is disposed between the filtration tower and the activated carbon tower, suspended substances in the waste water are removed by the filtration tower. Later, the micro-nano bubbles can be efficiently generated in the third micro-nano bubble generation tank, and most of the organic matter adsorbed by the activated carbon can be decomposed by the microorganisms activated by the micro-nano bubbles.

  Moreover, in the waste water treatment apparatus of one Embodiment, a part of said waste_water | drain discharged | emitted from the said 1st microorganisms tank is returned to the said 1st micro nano bubble generation tank.

  According to the waste water treatment apparatus of this embodiment, a part of the waste water discharged from the first microorganism tank is returned to the first micro / nano bubble generation tank, so that the micro / nano bubbles in the first microorganism tank are When the microorganisms are consumed and the performance in the first microorganism tank deteriorates, the micro-nano bubbles can be added to the waste water, and at the same time, the waste water can be treated again.

  Moreover, in the waste water treatment apparatus of one Embodiment, a part of the said waste_water | drain discharged | emitted from the said 2nd microorganism tank is returned to the said 1st micro nano bubble generation tank.

  According to the waste water treatment apparatus of this embodiment, a part of the waste water discharged from the second microorganism tank is returned to the first micro / nano bubble generation tank, so the first microorganism tank and the second microorganism When the micro / nano bubbles in the tank are consumed by the microorganisms and the performance in the first and second microorganism tanks deteriorates, the micro / nano bubbles can be added to the waste water and at the same time, the waste water can be treated again. .

Moreover, in the wastewater treatment apparatus of one embodiment,
The first microorganism tank has a plurality of regions communicating in series,
The filter membrane is disposed in the most downstream region of the plurality of regions,
The microorganisms present in the most downstream region of the plurality of regions are returned to the most upstream region of the plurality of regions.

  According to the wastewater treatment apparatus of this embodiment, the filter membrane is disposed in the most downstream region of the plurality of regions, and the microorganisms present in the most downstream region of the plurality of regions are Since it is returned to the most upstream region of the plurality of regions, the concentration of the microorganism is increased by the filter membrane, the microorganism is circulated and stirred in the plurality of regions, and the organic fluorine compound in the waste water is removed. It can be decomposed efficiently.

  In one embodiment, the activated carbon tower has a polyvinylidene chloride filler on the upstream side and an activated carbon layer filled with the activated carbon on the downstream side.

  According to the wastewater treatment apparatus of this embodiment, the activated carbon tower has a polyvinylidene chloride filler on the upstream side and an activated carbon layer filled with the activated carbon on the downstream side. A large amount of microorganisms can be propagated. Then, the microorganism can be peeled off from the polyvinylidene chloride filler, and the microorganism can be propagated in a large amount on the activated carbon of the activated carbon layer, so that the organic fluorine compound can be reliably treated.

  Moreover, in the waste water treatment apparatus of one Embodiment, the said polyvinylidene chloride filler is a string shape.

  According to the wastewater treatment apparatus of this embodiment, since the polyvinylidene chloride filler is in a string shape, a large amount of the polyvinylidene chloride filler can be accommodated in the upstream portion of the activated carbon tower.

  Moreover, in the waste water treatment apparatus of one Embodiment, the said polyvinylidene chloride filler is ring shape.

  According to the waste water treatment apparatus of this embodiment, since the polyvinylidene chloride filler is in a ring shape, the polyvinylidene chloride filler can be easily accommodated in the upstream portion of the activated carbon tower.

  In one embodiment, the micro / nano bubble generator is a submersible pump type micro / nano bubble generator.

  According to the waste water treatment apparatus of this embodiment, since the micro / nano bubble generator is a submersible pump type micro / nano bubble generator, a large amount of micro / nano bubbles can be generated with a simple configuration.

Moreover, in the wastewater treatment apparatus of one embodiment,
In the activated carbon of the activated carbon tower, the microorganisms activated by the micro-nano bubbles are propagated,
The activated carbon is brought into contact with the waste water to adsorb the organic fluorine compound and the organic matter in the waste water, and the adsorbed organic fluorine compound and the organic matter are decomposed by the microorganism.

  According to the waste water treatment apparatus of this embodiment, the microorganisms activated by the micro-nano bubbles are propagated on the activated carbon of the activated carbon tower, and the activated carbon contains the organic fluorine compound and the organic matter in the waste water. The adsorbed and the adsorbed organic fluorine compound and the organic matter are decomposed by the microorganism, so that the activated carbon can be automatically regenerated. That is, there is no need to regenerate the activated carbon, and maintenance costs and running costs can be reduced.

Moreover, in the wastewater treatment apparatus of one embodiment,
In the activated carbon of the activated carbon tower, the microorganisms activated by the micro-nano bubbles generated by the micro-nano bubble generating aid are propagated,
The activated carbon is brought into contact with the waste water to adsorb the organic fluorine compound and the organic matter in the waste water, and the adsorbed organic fluorine compound and the organic matter are decomposed by the microorganism.

  According to the wastewater treatment apparatus of this embodiment, the microorganisms activated by the micro-nano bubbles generated by the micro-nano bubble generation aid are propagated on the activated carbon of the activated carbon tower, and the activated carbon is separated from the waste water. The adsorbed organic fluorine compound and the organic substance therein are decomposed, and the adsorbed organic fluorine compound and the organic substance are decomposed by the microorganism, so that the activated carbon can be automatically regenerated. That is, there is no need to regenerate the activated carbon, and maintenance costs and running costs can be reduced.

Moreover, in the wastewater treatment apparatus of one embodiment,
In the activated carbon of the activated carbon tower, the microorganisms activated with the micro-nano bubbles and the nutrients are propagated,
The activated carbon is brought into contact with the waste water to adsorb the organic fluorine compound and the organic matter in the waste water, and the adsorbed organic fluorine compound and the organic matter are decomposed by the microorganism.

  According to the wastewater treatment apparatus of this embodiment, the activated carbon of the activated carbon tower is propagated with the microorganisms activated with the micro-nano bubbles and the nutrient, and the activated carbon is the organic fluorine compound in the wastewater. The organic matter is adsorbed, and the adsorbed organic fluorine compound and the organic matter are decomposed by the microorganism, so that the activated carbon can be automatically regenerated. That is, there is no need to regenerate the activated carbon, and maintenance costs and running costs can be reduced.

  Moreover, in the microorganisms activation apparatus of one Embodiment, the said micro nano bubble generation adjuvant is a surfactant decomposed | disassembled by the said microorganisms.

  According to the microorganism activation apparatus of this embodiment, since the micro / nano bubble generation aid is a surfactant, the surfactant can be easily and inexpensively procured. Further, since the surfactant is decomposed by the microorganism, the surfactant is decomposed by the microorganism when the surfactant becomes unnecessary after the generation of the micro / nano bubbles, and the load on the environment is reduced. Can be eliminated.

  According to the waste water treatment method of the present invention, the waste water is separated from the first micro / nano bubble generation tank, the first microorganism treatment section, the second micro / nano bubble generation tank, the second microorganism treatment section, the third micro / nano bubble generation tank, and the third microorganism. While sequentially flowing into the processing unit, microorganisms, nutrients and micro-nano bubble generation assistants are added to the second micro-nano bubble generation tank and the third micro-nano bubble generation tank, and the first micro-nano bubble generation tank, In the 2 micronano bubble generation tank and the 3rd micronano bubble generation tank, the wastewater contains micronanobubbles, and the wastewater in the first microorganism treatment part, the second microorganism treatment part, and the third microorganism treatment part. The organic fluorine compound and the organic substance in it are decomposed by the microorganisms, The machine fluorine compound can be effectively decomposed by microorganisms.

  Further, according to the waste water treatment apparatus of the present invention, the first waste water treatment unit, the second microorganism treatment unit, and the second microorganism treatment unit that sequentially flow the waste water and contain the organic fluorine compound in the waste water and microorganisms that decompose the organic matter. 3 microbial treatment units, a first micro / nano bubble generation tank that is connected upstream of the first microbial treatment unit and accommodates a micro / nano bubble generator, and between the first microbial treatment unit and the second microbial treatment unit And a second micro / nano bubble generation tank for accommodating the micro / nano bubble generator, and a third micro / nano bubble generator that is connected between the second microorganism treatment unit and the third microorganism treatment unit and accommodates the micro / nano bubble generator. A micro-nano bubble generation tank, and the second micro-nano bubble generation tank and the third micro-nano bubble generation tank include the microorganism, Nutrients for serial microorganisms, and so are added to micro-nano bubble generating aid, may be degraded by effectively microorganisms hardly decomposable organic fluorine compound.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

(First embodiment)
FIG. 1: has shown the schematic diagram which is 1st Embodiment of the waste water treatment equipment of this invention. This waste water treatment apparatus is connected in series and flows (introduces) waste water containing an organic fluorine compound and an organic substance in order (introduced), a first microorganism treatment unit 101, a second microorganism treatment unit 102, and a third microorganism treatment unit 103; The first micro / nano bubble generation tank 3 connected upstream of the first microorganism processing unit 101 and the generation of the second micro / nano bubbles connected between the first microorganism processing unit 101 and the second microorganism processing unit 102 It has the tank 17, and the 3rd micro nano bubble generation tank 32 connected between the said 2nd microorganisms processing part 102 and the said 3rd microorganisms processing part 103. FIG.

  The first microbial treatment unit 101, the second microbial treatment unit 102, and the third microbial treatment unit 103 contain microorganisms that decompose the organic fluorine compound and the organic matter in the waste water, respectively.

  The first micro / nano bubble generation tank 3, the second micro / nano bubble generation tank 17, and the third micro / nano bubble generation tank 32 accommodate the micro / nano bubble generators 4, 18, and 33, respectively.

  The second micro / nano bubble generation tank 17 and the third micro / nano bubble generation tank 32 are added with the microorganism, a nutrient for the microorganism, and a micro / nano bubble generation aid.

  The first microorganism treatment unit 101 includes a first microorganism tank 9 that houses the air lift pump 12. The second microorganism treatment unit 102 has a second microorganism tank 23 that houses the air lift pump 24. The third microorganism treatment unit 103 includes an activated carbon tower 38 that stores activated carbon.

  Here, the above-mentioned micro / nano bubble generation aid means one that can stably maintain the generation state of micro / nano bubbles. The micro / nano bubble generation aid is, for example, a surfactant that is decomposed by the microorganism. The said nutrient is a nutrient required when microorganisms are activated. Examples of the organic fluorine compound include perfluorooctasulfonic acid (PFOS), perfluorooctanoic acid (PFOA), and perfluorinated alkyl sulfonates (PFAS).

  The raw water tank 1 is connected upstream of the first micro / nano bubble generation tank 3. The waste water is introduced into the raw water tank 1. The raw water tank 1 is provided with a raw water tank pump 2, and the waste water is introduced into the first micro / nano bubble generation tank 3 after the flow rate is adjusted by a valve 6.

  The micro / nano bubble generator 4 in the first micro / nano bubble generation tank 3 is a submersible pump type micro / nano bubble generator.

  The water flow 5 is generated by fine bubbles (micro nano bubbles) discharged from the micro nano bubble generator 4. This water flow 5 becomes a circulating water flow in the first micro / nano bubble generation tank 3 and is stirred in the first micro / nano bubble generation tank 3.

  In the first micro / nano bubble generation tank 3, since the organic fluorine compound which is also the surfactant in the waste water is not decomposed at all, the micro / nano bubble is generated extremely ideally. On the other hand, it has been proved by experiments that the micro-nano bubbles are efficiently generated when an organic fluorine compound as a surfactant is present in the waste water.

  Therefore, the first nano / nano bubble generation tank 3 is not added with water containing the micro / nano bubble generation aid. Moreover, since organic substance is not decomposed | disassembled by microorganisms (that is, the nutrient of microorganisms exists), nutrient solution containing water and microorganisms containing water are not added.

  An air suction pipe 7 is connected to the micro / nano bubble generator 4, and the micro / nano bubble generator 4 sucks air from the air suction pipe 7, causing a swirling flow of water and air at ultra high speed, Generate nanobubbles. The waste water and the micro-nano bubbles are mixed by the micro-nano bubble flow. The necessary air to the micro / nano bubble generator 4 is adjusted by the valve 6 to generate an optimum micro / nano bubble. A blower 59 is connected to the air suction pipe 7, and the amount of air to the micro / nano bubble generator 4 is adjusted by the blower 59.

  The micro-nano bubble generator 4 is not limited to a manufacturer as long as it is commercially available, and specifically, there are products of Nomura Electronics Co., Ltd. and Auratech Co., Ltd.

  Here, the micro-nano bubble refers to a bubble having a diameter of about 10 μm to several hundred nm. In addition, a normal bubble (bubble) rises in the water and finally disappears by popping on the surface. Microbubbles refer to bubbles having a bubble diameter of 10 μm to several tens of μm. They shrink in water and eventually disappear (completely dissolve). Moreover, nanobubble means the bubble which has a diameter of several hundred nm or less, and can exist in water forever. And it can be said that a micro nano bubble is a bubble which micro bubble and nano bubble mixed.

  The first microorganism tank 9 has a plurality of regions communicating in series. That is, the first microorganism tank 9 includes a first microorganism part 53, a second microorganism part 54, a third microorganism part 55, and a fourth microorganism part 56 in order from the upstream to the downstream.

  The first microbial part 53, the second microbial part 54, the third microbial part 55, and the fourth microbial part 56 are each divided by a partition wall 10. The fourth microorganism part 56 is provided with an air lift pump 12, a filter membrane (for example, a trade name “submerged membrane”) 14, and a filter membrane pump 15 connected to the filter membrane 14. .

  The air lift pump 12 discharges air from the blower 16 from the middle of the pipe to move a large amount of microbial sludge of the fourth microbial part 56 to the lower part of the first microbial part 53 with less energy.

  Therefore, a sludge flow 57 (indicated by an arrow) is generated in the first microorganism section 53, the second microorganism section 54, the third microorganism section 55, and the fourth microorganism section 56, and the first microorganism tank 9 can be stirred. In the first micro / nano bubble generation tank 3, since micro / nano bubbles are mixed in the waste water, the aerobic state continues to the fourth microorganism part 56. That is, aeration by a combination of a normal blower and an air diffuser is unnecessary, and significant energy saving can be achieved.

  The filter membrane 14 separates the microorganisms from the wastewater, and the separated wastewater is guided downstream of the first microorganism tank 9 by the pump 15. The air diffuser 13 connected by piping from the blower 16 cleans the filter membrane 14 with air.

  And in the said 1st microorganisms tank 9, most of the said organic substance contained in the said waste_water | drain, and a part of said organic fluorine compound are decomposed | disassembled.

  In the second micro / nano bubble generation tank 17, microorganism-containing water, micro / nano bubble generation aid-containing water, and nutrient-containing water are added while adjusting their respective flow rates by the valve 6 to generate micro / nano bubbles. In the water stream 19 from the micro / nano bubble generator 18, the microorganism-containing water, the micro / nano bubble generation aid-containing water, the nutrient-containing water, and the waste water are stirred and mixed.

  The reason for adding the microorganism-containing water, the micro-nano bubble generation aid-containing water and the nutrient-containing water is that the organic fluorine compound or organic matter in the waste water is microbially decomposed in the first microorganism tank 9 to generate micro-nano bubbles. This is because it is difficult to do, has fewer microorganisms, and has less nutrition.

  The necessary air to the micro / nano bubble generator 18 is adjusted by the air suction pipe 21, the valve 6 and the blower 59 to generate the optimum micro / nano bubbles. Since the micro-nano bubble generator 18 has the same configuration as the micro-nano bubble generator 4, the description thereof is omitted.

  The second microorganism tank 23 has a watering tank part 29, a water spray part 48 and an immersion part 49 in order from the top to the bottom. The water spray part 48 and the immersion part 49 have 28 activated carbon. The drainage water in the immersion part 49 is introduced into the sprinkling tank part 29 by the air lift pump 24 and sprinkled from the sprinkling tank part 29 to the sprinkled part 48 and the immersion part 49 by gravity. . The activated carbon 28 is accommodated in a net bag 27.

  The activated carbon 28 in the immersion part 49 is always immersed in the waste water. The activated carbon 28 in the water sprayed part 48 is not always immersed and contacts the drainage in a watered state.

  The net bag 27 containing the activated carbon 28 is filled in a space formed by the vertical partition plate 25 and the horizontal porous plate 26 in the water spray portion 48 and the immersion portion 49. .

  The waste water at the lower part of the second microorganism tank 23 is transferred to the sprinkling tank section 29 by the air lift pump 24, and then sprinkled into the sprinkled section 48 under natural flow, and further, the immersion section. 49, the organic fluorine compound and the organic matter in the waste water are adsorbed on the activated carbon 28, and then propagated on the activated carbon 28 and decomposed by microorganisms activated by micro-nano bubbles.

  A filtration tower 31 is connected to the upstream side of the activated carbon tower 38. That is, the third micro / nano bubble generation tank 32 is disposed between the filtration tower 31 and the activated carbon tower 38.

  The waste water containing the remaining organic fluorine compound is introduced into the filtration tower 31, the third micro / nano bubble generation tank 32, and the activated carbon tower 38 by the second microbial pump 30. The filter tower 31 is, for example, a rapid filter, and the filter tower 31 is filled with coal-based anthracite, and mainly filters the suspended substances in the waste water physically.

  The third micro / nano bubble generation tank 32 is designed to be compact, and is located in the upper part upstream of the activated carbon tower 38. Microbe-containing water, micro-nano bubble generation aid-containing water, and nutrient-containing water are added to the third micro / nano bubble tank 32 while adjusting the flow rate thereof by the valve 6, Stirred with water stream 34.

  The reason for adding the microorganism-containing water, the micro-nano bubble generation aid-containing water and the nutrient-containing water is that the organic fluorine compound or organic matter in the waste water is microbially decomposed in the second microbial tank 23 to form micro-nano bubbles. This is because they are less likely to occur, have fewer microorganisms, and have less nutrition.

  The necessary air to the micro / nano bubble generator 33 is adjusted by the air suction pipe 36, the valve 6 and the blower 59 to generate the optimum micro / nano bubbles. Since the micro-nano bubble generator 33 has the same configuration as the micro-nano bubble generator 4, the description thereof is omitted.

  In the third micro / nano bubble generation tank 32, the waste water containing micro / nano bubbles is transferred to the activated carbon tower 38, and most of the organic fluorine compound is adsorbed on the activated carbon in the activated carbon tower 38. And most of the adsorbed organofluorine compounds will be decomposed by microorganisms that have propagated and activated on activated carbon.

  A branch pipe is provided on the downstream side of the activated carbon tower 38, and one side of the branch pipe is connected to the water tank 29 of the second microorganism tank 23 via a valve 39 for the second microorganism tank. The other side of the branch pipe is connected to a treated water tank 41 via a treated water tank valve 40.

  Then, the wastewater discharged from the activated carbon tower 38 is transferred to the treated water tank 41 with the valve 40 for the treated water tank opened, the valve 39 for the second microorganism tank closed, and transferred from the treated water tank 41 to the treated water tank 41. It is discharged as treated water.

  When the treatment of the waste water is incomplete, the waste water is treated again by closing the valve 40 for the treated water tank and opening the valve 39 for the second microorganism tank. Further, the treatment is performed while circulating between the second microorganism tank 23 and the activated carbon tower 38 with the valve 39 for the second microorganism tank half opened and the valve 40 for the treated water tank also half opened. You can also.

  Next, a method for treating wastewater using the wastewater treatment apparatus having the above configuration will be described.

  Wastewater containing an organic fluorine compound and an organic substance is discharged into the first micro / nano bubble generation tank 3, the first microorganism treatment unit 101, the second micro / nano bubble generation tank 17, the second microorganism treatment unit 102, the third micro / nano bubble generation tank 32, and the first. The microorganisms, nutrients, and micro-nano bubble generation assistants are added to the second micro-nano bubble generation tank 17 and the third micro-nano bubble generation tank 32 while flowing through the three microorganism processing unit 103 in order, and the first micro-nano bubble is added. In the generation tank 3, the second micro / nano bubble generation tank 17, and the third micro / nano bubble generation tank 32, the waste water contains micro / nano bubbles, and the first microorganism processing unit 101, the second microorganism processing unit 102, and In the third microorganism treatment unit 103, the organic fluorination in the waste water Things and the organics decompose by the microorganism.

  According to the wastewater treatment apparatus having the above-described configuration, since the first microorganism treatment unit 101, the second microorganism treatment unit 102, and the third microorganism treatment unit 103 are included, the wastewater treatment with the microorganisms can be performed in three stages. The efficiency of the waste water treatment can be improved.

  Moreover, since it has the said 1st micro nano bubble generation tank 3, the said 2nd micro nano bubble generation tank 17, and the said 3rd micro nano bubble generation tank 32, even if the said micro nano bubble is consumed by an aerobic microorganism, it is replenished each time. Therefore, the micro-nano bubbles can be used effectively, and the microorganisms propagated in the first microorganism processing unit 101, the second microorganism processing unit 102, and the third microorganism processing unit 103 can be activated.

  Moreover, since the said 2nd micro nano bubble generation tank 17 and the said 3rd micro nano bubble generation tank 32 are added with the said microorganisms, the nutrient for the said microorganisms, and the micro nano bubble generation adjuvant, the said 1st microorganisms processing The microorganisms in the part 101, the second microorganism treatment part 102, and the third microorganism treatment part 103 can be further activated, and the decomposition efficiency of the organic fluorine compound and the organic matter in the waste water can be improved.

  Therefore, the hardly decomposable organic fluorine compound (for example, perfluorooctasulfonic acid (PFOS), perfluorooctanoic acid (PFOA), perfluorinated alkyl sulfonates (PFAS)) contained in the waste water is effectively removed by microorganisms. Can be disassembled.

  Further, since the organic fluorine compound is perfluorooctasulfonic acid or perfluorooctanoic acid, the organic fluorine compound which is a problem from the viewpoint of environmental pollution can be decomposed.

  The first microbial treatment unit 101 has a first microbial tank 9 that houses an air lift pump 12, and the second microbial treatment unit 102 has a second microbial tank 23 that houses an air lift pump 24. Therefore, the agitation circulation of the first microorganism treatment unit 101 and the second microorganism treatment unit 102 can be performed by the air lift pumps 12 and 24, and energy saving can be achieved as compared with the aeration type agitation. Moreover, since the activated carbon tower is in the final stage, the waste water can be treated reliably.

  The first microorganism tank 9 has a filter membrane 14 that separates the microorganisms from the waste water and guides the waste water to the downstream side of the first microorganism tank 9. Therefore, the first microorganism tank 9 has the filter membrane 14 in the first microorganism tank 9. The concentration of microorganisms can be increased, and the treatment of the waste water can be stabilized.

  Further, the water spray part 48 and the immersion part 49 have activated carbon 28, and the waste water in the immersion part 49 is introduced into the water spray tank part 29 by the air lift pump 24, and is gravity. Since water is sprayed from the water sprinkling tank 29 to the water sprayed part 48 and the immersion part 49, the activated carbon 28 accommodated in the water sprayed part 48 and the immersion part 49 converts the organic fluorine compound in the waste water. The activated microorganisms that are reasonably adsorbed and propagated on the activated carbon 28 can efficiently decompose the organic fluorine compound.

  Further, since the activated carbon 28 is accommodated in the mesh bag 27, the activated carbon 28 can be easily accommodated in the second microorganism tank 23 together with the mesh bag 27.

  Moreover, since it has the filtration tower 31 connected to the upstream side of the activated carbon tower 38, the floating substance adhering to the surface of the activated carbon of the activated carbon tower 38 can be removed by the filtration tower 31, and the adsorption performance of the activated carbon. Can be improved.

  In addition, since the third micro / nano bubble generation tank 32 is disposed between the filtration tower 31 and the activated carbon tower 38, after the floating substance in the waste water is removed by the filtration tower 31, the third micro-nano bubble generation tank 32 is disposed. The micro-nano bubbles can be efficiently generated in the micro-nano bubble generation tank 32, and most of the organic matter adsorbed by the activated carbon can be decomposed by the microorganisms activated by the micro-nano bubbles.

  Further, since the micro / nano bubble generators 4, 18, and 33 are submersible pump type micro / nano bubble generators, a large amount of micro / nano bubbles can be generated with a simple configuration.

  Moreover, since the micro / nano bubble generation aid is a surfactant, the surfactant can be easily and inexpensively procured. Further, since the surfactant is decomposed by the microorganism, the surfactant is decomposed by the microorganism when the surfactant becomes unnecessary after the generation of the micro / nano bubbles, and the load on the environment is reduced. Can be eliminated.

  The activated carbon of the activated carbon tower 38 is propagated with the microorganisms activated by the micro-nano bubbles, and the activated carbon adsorbs the organic fluorine compound and the organic matter in the waste water, and the adsorbed organic Since the fluorine compound and the organic matter are decomposed by the microorganism, the activated carbon can be automatically regenerated. That is, there is no need to regenerate the activated carbon, and maintenance costs and running costs can be reduced.

  The activated carbon of the activated carbon tower 38 is propagated with the microorganisms activated by the micro-nano bubbles generated with the micro-nano bubble generating aid, and the activated carbon is composed of the organic fluorine compound in the waste water and the Since the organic matter is adsorbed and the adsorbed organic fluorine compound and the organic matter are decomposed by the microorganism, the activated carbon can be automatically regenerated.

  The activated carbon of the activated carbon tower 38 is propagated with the microorganisms activated with the micro-nano bubbles and the nutrient, and the activated carbon adsorbs the organic fluorine compound and the organic matter in the waste water. Since the adsorbed organic fluorine compound and organic matter are decomposed by the microorganism, the activated carbon can be automatically regenerated.

(Second Embodiment)
FIG. 2 shows a second embodiment of the waste water treatment apparatus of the present invention. The difference from the first embodiment shown in FIG. 1 will be described. In the second embodiment, the first biological tank 9 contains a string-like polyvinylidene chloride filler 42 as a filler. Yes. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  That is, the string-like polyvinylidene chloride filler 42 is filled in the first microorganism part 53, the second microorganism part 54, and the third microorganism part 55.

  Therefore, activated microbes are propagated in a large amount in the string-like polyvinylidene chloride filler 42 by the micro-nano bubbles. Moreover, the microorganisms propagated at a high concentration on the string-like polyvinylidene chloride filler 42 can first decompose organic substances that are relatively easily decomposed.

(Third embodiment)
FIG. 3 shows a third embodiment of the waste water treatment apparatus of the present invention. The difference from the first embodiment shown in FIG. 1 will be described. In the third embodiment, the third micro / nano bubble generating tank 32 contains a string-like polyvinylidene chloride filler 42 as a filler. is doing. In the third embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  Therefore, activated microbes are propagated in a large amount in the string-like polyvinylidene chloride filler 42 by the micro-nano bubbles. Further, a part of the microorganisms that have propagated in the string-like polyvinylidene chloride filler 42 at a high concentration are separated from the string-like polyvinylidene chloride filler 42 and transferred to the activated carbon tower 38, and the activated carbon tower A large amount of the activated carbon in 32 will also be propagated.

  In short, since it has been found that the organic fluorine compound can be decomposed by the activated microbe adsorbed on the activated carbon in the activated carbon tower 32 and then activated, the string-like polyvinylidene chloride filling in the third micro-nano bubble generating tank 32 is filled. After the microorganisms of the material 42 are propagated in large quantities, they are naturally separated, and a large amount of activated microorganisms are moved into the activated carbon tower 38 to reliably decompose the organic fluorine compound adsorbed by the activated carbon.

(Fourth embodiment)
FIG. 4 shows a fourth embodiment of the waste water treatment apparatus of the present invention. The difference from the first embodiment shown in FIG. 1 will be described. In the fourth embodiment, a part of the waste water discharged from the first microorganism tank 9 is the first micro / nano bubble generation tank. 3 is returned. Note that in the fourth embodiment, the same portions as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  That is, the waste water at the outlet of the filter membrane pump 15 is transferred to both the second micro / nano bubble generation tank 17 and the first micro / nano bubble generation tank 3. And the flow volume of the waste_water | drain discharged | emitted from the said 1st microorganisms tank 9 is adjusted with the opening degree of the valve 44 for the 2nd micro nano bubble generation tank and the valve 45 for the 1st micro nano bubble generation tank.

  Therefore, a part of the waste water discharged from the first microorganism tank 9 is returned to the first micro / nano bubble generation tank 3, so that the micro / nano bubbles in the first microorganism tank 9 are consumed by the microorganisms. When the performance in the first microorganism tank 9 deteriorates, the micro-nano bubbles can be added to the waste water, and at the same time, the waste water can be treated again.

(Fifth embodiment)
FIG. 5 shows a fifth embodiment of the waste water treatment apparatus of the present invention. The difference from the first embodiment shown in FIG. 1 will be described. In the fifth embodiment, a part of the drainage discharged from the second microorganism tank 23 is the first micro / nano bubble generation tank. 3 is returned. In the fifth embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  That is, the waste water at the outlet of the second microbial tank pump 30 is transferred to both the filtration tower 31 and the first micro / nano bubble generation tank 3. And the flow volume of the waste_water | drain discharged | emitted from the said 2nd microorganism tank 23 is adjusted with the opening degree of the valve 46 for filtration towers, and the valve 47 for 1st micro nano bubble generation tanks.

  Therefore, a part of the waste water discharged from the second microorganism tank 23 is returned to the first micro-nano bubble generation tank 3, so that the micro-nano bubbles in the first microorganism tank 9 and the second microorganism tank 23 are returned. Is consumed by the microorganisms, and when the performance in the first microorganism tank 9 and the second microorganism tank 23 deteriorates, the micro-nano bubbles can be added to the waste water, and the waste water can be treated again.

(Sixth embodiment)
FIG. 6 shows a sixth embodiment of the waste water treatment apparatus of the present invention. The difference from the first embodiment shown in FIG. 1 will be described. In the sixth embodiment, the microorganisms present in the fourth microorganism part 56 that is the most downstream region are in the most upstream region. Returned to a certain first microorganism part 53. The filter membrane 14 is disposed in the fourth microorganism part 56. Note that in the sixth embodiment, the same portions as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  That is, the microbial sludge below the fourth microbial part 56 is returned to the first microbial part 53 by the sludge return pump 58. In this way, the number of circulations in the first microorganism tank 9 is increased along with the circulation of the air lift pump 12. In the circulation of the air lift pump 12, aerobic by air is maintained, which is convenient for aerobic microorganisms, but not suitable for anaerobic microorganisms. When the first microbial tank 9 is a deep microbial tank, particularly anaerobic microorganisms are generated, but it is suitable to return the anaerobic microorganisms to the first microbial part 53 by the sludge return pump 58. . And the digestion of sludge and the denitrification of nitrogen by anaerobic microorganisms can be expected.

  Therefore, the filter membrane 14 is arranged in the fourth microorganism part 56 that is the most downstream area, and the microorganism that is present in the fourth microorganism part 56 that is the most downstream area is the most upstream area. Since it is returned to the first microorganism part 53, the concentration of the microorganisms is increased by the filter membrane 14, and the microorganisms are separated into the first microorganism part 53, the second microorganism part 54, the third microorganism part 55 and the above. The fourth microorganism part 56 is circulated and stirred to efficiently decompose the organic fluorine compound in the waste water.

(Seventh embodiment)
FIG. 7 shows a seventh embodiment of the waste water treatment apparatus of the present invention. The difference from the first embodiment shown in FIG. 1 will be described. In the seventh embodiment, the activated carbon tower 38 includes a string-like polyvinylidene chloride filler 42 on the upstream side and the activated carbon on the downstream side. And an activated carbon layer 50 filled with. Note that in the seventh embodiment, the same portions as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  Then, activated microbes are propagated in a large amount on the above-mentioned string-like polyvinylidene chloride filler 42 as a filler by the micro / nano bubbles. Further, a part of the microorganisms that have propagated in the string-like polyvinylidene chloride filler 42 at a high concentration are detached from the string-like polyvinylidene chloride filler 42 and transferred to the activated carbon layer 50, and the activated carbon tower 38. A large amount of the activated carbon layer 50 is propagated.

  In short, since it was found that the organic fluorine compound can be decomposed by the activated microorganisms adsorbed on the activated carbon of the activated carbon layer 50 and then activated, the microorganisms are put on the string-like polyvinylidene chloride filler 42 in the activated carbon tower 38. After being propagated in large quantities, it is naturally peeled off, and the large amount of activated microorganisms is moved to the activated carbon layer 50 to reliably decompose the organic fluorine compound adsorbed by the activated carbon in the activated carbon layer 50. .

  Therefore, since the activated carbon tower 38 has the string-like polyvinylidene chloride filler 42 on the upstream side and the activated carbon layer 50 on the downstream side, the microorganism can be propagated in a large amount on the string-like polyvinylidene chloride filler 42. . And the said microorganisms can be peeled from the said string-like polyvinylidene chloride filler 42, the said microorganisms can be propagated in large quantities on the said activated carbon of the said activated carbon layer 50, and the said organic fluorine compound can be processed reliably. Moreover, since the said string-like polyvinylidene chloride filler 42 is a string shape, many said string-like polyvinylidene chloride fillers 42 can be accommodated in the upstream part of the said activated carbon tower 38. FIG.

(Eighth embodiment)
FIG. 8 shows an eighth embodiment of the waste water treatment apparatus of the present invention. The difference from the first embodiment shown in FIG. 1 will be described. In the eighth embodiment, the activated carbon tower 38 includes a ring-shaped polyvinylidene chloride filler 52 on the upstream side and the activated carbon on the downstream side. And an activated carbon layer 50 filled with. In the eighth embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  Then, activated microbes are propagated in a large amount on the ring-shaped polyvinylidene chloride filler 52 as a filler by the micro-nano bubbles. Further, a part of the microorganisms propagated in the ring-shaped polyvinylidene chloride filler 52 at a high concentration are detached from the ring-shaped polyvinylidene chloride filler 52 and transferred to the activated carbon layer 50, and the activated carbon tower 38. A large amount of the activated carbon layer 50 is propagated.

  In short, since it has been found that the organic fluorine compound can be decomposed by the activated carbon adsorbed on the activated carbon of the activated carbon layer 50 and then activated, the microorganism is put on the ring-shaped polyvinylidene chloride filler 52 in the activated carbon tower 38. After being propagated in large quantities, it is naturally peeled off, and the large amount of activated microorganisms is moved to the activated carbon layer 50 to reliably decompose the organic fluorine compound adsorbed by the activated carbon in the activated carbon layer 50. .

  Therefore, since the activated carbon tower 38 has the ring-shaped polyvinylidene chloride filler 52 on the upstream side and the activated carbon layer 50 on the downstream side, the microorganism can be propagated in a large amount on the ring-shaped polyvinylidene chloride filler 52. . And the said microorganisms can be peeled from the said ring-shaped polyvinylidene chloride filler 52, and the said microorganisms can be propagated in large quantities on the said activated carbon of the said activated carbon layer 50, and the said organic fluorine compound can be processed reliably. Moreover, since the said ring-shaped polyvinylidene chloride filler 52 is ring-shaped, the said ring-shaped polyvinylidene chloride filler 52 can be easily accommodated in the upstream part of the said activated carbon tower 38. FIG.

(Experimental example 1)
An experimental apparatus corresponding to the first embodiment of FIG. 1 was manufactured. In this experimental apparatus, the capacity of the raw water tank 1 is about 5 m ³ , the capacity of the first micro / nano bubble generation tank 3 is about 1 m ³ , the capacity of the first microorganism tank 9 is about 20 m ^3, and the second The capacity of the micro / nano bubble generation tank 17 is about 1 m ³ , the capacity of the second microorganism tank 23 is about 10 m ³ , the capacity of the filtration tower 31 is 1 m ^3, and the capacity of the third micro / nano bubble generation tank 32 is about 1 m ³ , the capacity of the activated carbon tower 38 was 3 m ³ , and the wastewater containing the organic fluorine compound and the organic substance was introduced into the raw water tank 1 for about 2 months, and a test operation was performed.

  After the trial operation, the concentration of PFOS (perfluorooctane sulfonic acid) at the inlet of the raw water tank 1 and the concentration of PFOS (perfluorooctane sulfonic acid) at the outlet of the activated carbon tower 38 were measured, and the removal rate of PFOS was measured. However, it was 99%. That is, persistent PFOS can be effectively decomposed by microorganisms.

(Experimental example 2)
Furthermore, as another experimental example, data demonstrating the effect of wastewater treatment using an apparatus corresponding to the first embodiment of FIG. 1 is shown.

  When the “anionic surfactant concentration” was measured at each treatment step, it was as follows. The “anionic surfactant concentration” is proportional to the concentration of the organic fluorine compound.

  The concentration of waste water charged into the raw water tank 1 was 13 PPM, which was a very high concentration. The density | concentration after the process of the said 2nd microorganisms tank 23 which is the 2nd step | paragraph was 4.1PPM, and was a medium density | concentration. The concentration after the treatment of the activated carbon tower 38 in the third stage was 0.04 PPM, which was a low concentration.

  If the “anionic surfactant concentration” is about 1 PPM or less, it is considered that there is almost no problem in practical use. Therefore, it is considered that the waste water after the treatment of the activated carbon tower 38, which is the third stage, has a considerably good waste water level.

  In short, in the wastewater treatment apparatus of the present invention, wastewater treatment is performed in three stages: the first microorganism tank 9 that is a low level treatment, the second microorganism tank 23 that is a medium level treatment, and the activated carbon tower 38 that is a high level treatment. A micro-nano bubble generator is installed for each wastewater treatment. In this way, microorganisms are activated by micro-nano bubbles, and the organic fluorine compound in the waste water is decomposed to a level where there is no practical problem.

  In addition, this invention is not limited to the above-mentioned embodiment. For example, in the first to eighth embodiments, the first micro / nano bubble generation tank 3, the second micro / nano bubble generation tank 17, the third micro / nano bubble generation tank 32, the first microorganism tank 9, and the first The string-like polyvinylidene chloride filler 42 and the ring-like polyvinylidene chloride filler 52 may be accommodated in at least one of the two microorganism tank 23 and the activated carbon tower 38.

It is a schematic diagram which shows 1st Embodiment of the waste water treatment equipment of this invention. It is a schematic diagram which shows 2nd Embodiment of the waste water treatment equipment of this invention. It is a schematic diagram which shows 3rd Embodiment of the waste water treatment equipment of this invention. It is a schematic diagram which shows 4th Embodiment of the waste water treatment equipment of this invention. It is a schematic diagram which shows 5th Embodiment of the waste water treatment equipment of this invention. It is a schematic diagram which shows 6th Embodiment of the waste water treatment equipment of this invention. It is a schematic diagram which shows 7th Embodiment of the waste water treatment equipment of this invention. It is a schematic diagram which shows 8th Embodiment of the waste water treatment equipment of this invention.

Explanation of symbols

1 Raw Water Tank 3 First Micro / Nano Bubble Generation Tank 4 Micro / Nano Bubble Generator 9 First Microbial Tank 12 Air Lift Pump 14 Filter Membrane (Liquid Film)
17 Second micro / nano bubble generation tank 18 Micro / nano bubble generator 23 Second microorganism tank 24 Air lift pump 27 Net bag 28 Activated carbon 29 Sprinkling tank section 30 Second microorganism tank pump 31 Filtration tower 32 Third micro nano bubble generation tank 33 Micro nano bubble generation Machine 38 Activated carbon tower 41 Treated water tank 42 String-like polyvinylidene chloride filler 48 Water sprayed part 49 Dipping part 50 Activated carbon layer 52 Ring-like polyvinylidene chloride filler 53 First microorganism part 54 Second microorganism part 55 Third microorganism part 56 First 4 Microorganism part 101 First microorganism treatment part 102 Second microorganism treatment part 103 Third microorganism treatment part

Claims (20)

Wastewater containing an organic fluorine compound and an organic substance is discharged into a first micro / nano bubble generation tank, a first microorganism treatment section, a second micro / nano bubble generation tank, a second microorganism treatment section, a third micro / nano bubble generation tank, and a third microorganism treatment section. , Introducing in order,
To the second micro-nano bubble generation tank and the third micro-nano bubble generation tank, microorganisms, nutrients and micro-nano bubble generation aids are added,
In the first micro / nano bubble generation tank, the second micro / nano bubble generation tank, and the third micro / nano bubble generation tank, the waste water contains micro / nano bubbles,
A wastewater treatment method, wherein the organic fluorine compound and the organic matter in the wastewater are decomposed by the microorganisms in the first microorganism treatment unit, the second microorganism treatment unit, and the third microorganism treatment unit. A first microorganism treatment unit, a second microorganism treatment unit, which are connected in series and sequentially introduce wastewater containing an organic fluorine compound and an organic substance, and contain microorganisms that decompose the organic fluorine compound and the organic substance in the wastewater; A third microbial treatment section;
A first micro / nano bubble generation tank connected to the upstream of the first microorganism treatment unit and containing a micro / nano bubble generator;
A second micro / nano bubble generating tank connected between the first microorganism processing unit and the second microorganism processing unit and containing a micro / nano bubble generator;
A third micro / nano bubble generating tank connected between the second microorganism processing unit and the third microorganism processing unit and containing a micro / nano bubble generator;
The waste water treatment apparatus, wherein the second micro-nano bubble generation tank and the third micro-nano bubble generation tank are added with the microorganism, a nutrient for the microorganism, and a micro-nano bubble generation aid. The waste water treatment apparatus according to claim 2,
The wastewater treatment apparatus, wherein the organic fluorine compound is perfluorooctasulfonic acid or perfluorooctanoic acid. The waste water treatment apparatus according to claim 2,
The first microorganism treatment unit has a first microorganism tank that houses an air lift pump,
The second microorganism treatment unit has a second microorganism tank that houses an air lift pump,
The waste water treatment apparatus, wherein the third microorganism treatment unit has an activated carbon tower that accommodates activated carbon. The waste water treatment apparatus according to claim 4,
The first microorganism tank has a filter membrane that separates the microorganisms from the waste water and guides the waste water to a second micro-nano bubble generation tank on the downstream side of the first microorganism tank. The waste water treatment apparatus according to claim 4,
The second microbial tank has, in order from the top to the bottom, a watering tank part, a watering part and an immersion part,
The water spray part and the immersion part have activated carbon,
The waste water in the immersion part is introduced into the watering tank part by the air lift pump, and is sprayed from the watering tank part to the water spraying part and the immersion part by gravity. apparatus. The waste water treatment apparatus according to claim 6,
The activated carbon is housed in a net bag. The waste water treatment apparatus according to claim 4,
A wastewater treatment apparatus comprising a filtration tower connected to an upstream side of the activated carbon tower. The waste water treatment apparatus according to claim 8,
The waste water treatment apparatus, wherein the third micro / nano bubble generation tank is disposed between the filtration tower and the activated carbon tower. The waste water treatment apparatus according to claim 4,
A part of the waste water discharged from the first microorganism tank is returned to the first micro / nano bubble generation tank. The waste water treatment apparatus according to claim 4,
A part of the waste water discharged from the second microorganism tank is returned to the first micro / nano bubble generation tank. The waste water treatment apparatus according to claim 5,
The first microorganism tank has a plurality of regions communicating in series,
The filter membrane is disposed in the most downstream region of the plurality of regions,
The waste water treatment apparatus, wherein the microorganisms present in the most downstream region of the plurality of regions are returned to the most upstream region of the plurality of regions. The waste water treatment apparatus according to claim 4,
The activated carbon tower has a polyvinylidene chloride filler on the upstream side, and an activated carbon layer filled with the activated carbon on the downstream side. The waste water treatment apparatus according to claim 13,
The waste water treatment apparatus, wherein the polyvinylidene chloride filler is string-like. The waste water treatment apparatus according to claim 13,
The polyvinylidene chloride filler is a ring-shaped wastewater treatment apparatus. The waste water treatment apparatus according to claim 2,
The micro-nano bubble generator is a submersible pump type micro-nano bubble generator. The waste water treatment apparatus according to claim 4,
In the activated carbon of the activated carbon tower, the microorganisms activated by the micro-nano bubbles are propagated,
The activated carbon contacts the waste water and adsorbs the organic fluorine compound and the organic matter in the waste water, and the adsorbed organic fluorine compound and the organic matter are decomposed by the microorganism. Processing equipment. The waste water treatment apparatus according to claim 4,
In the activated carbon of the activated carbon tower, the microorganisms activated by the micro-nano bubbles generated by the micro-nano bubble generating aid are propagated,
The activated carbon contacts the waste water and adsorbs the organic fluorine compound and the organic matter in the waste water, and the adsorbed organic fluorine compound and the organic matter are decomposed by the microorganism. Processing equipment. The waste water treatment apparatus according to claim 4,
In the activated carbon of the activated carbon tower, the microorganisms activated with the micro-nano bubbles and the nutrients are propagated,
The activated carbon contacts the waste water and adsorbs the organic fluorine compound and the organic matter in the waste water, and the adsorbed organic fluorine compound and the organic matter are decomposed by the microorganism. Processing equipment. The waste water treatment apparatus according to claim 2,
The waste water treatment apparatus, wherein the micro-nano bubble generation aid is a surfactant that is decomposed by the microorganism.

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