WO2015060601A1

WO2015060601A1 - Hybrid water treatment system and method

Info

Publication number: WO2015060601A1
Application number: PCT/KR2014/009850
Authority: WO
Inventors: 이봉주; 이상주; 구민; 옥창우
Original assignee: (주)그린사이언스
Priority date: 2013-10-23
Filing date: 2014-10-20
Publication date: 2015-04-30
Also published as: KR20150047037A; KR101567006B1

Abstract

Disclosed are a hybrid water treatment system and a hybrid water treatment method. The hybrid water treatment system according to one embodiment of the present invention comprises: a plasma processing unit for causing a plasma discharge in the interior of a fluid and generating a radical so as to be capable of facilitating coagulation of pollutants in the interior of the fluid; and a coagulant supply unit for supplying a coagulant to the interior of the fluid and coagulating the pollutants in the interior of the fluid.

Description

Hybrid water treatment system and method

The present invention relates to a hybrid water treatment system and method for efficiently flocculating contaminants in a fluid.

Due to the industrial development and the increase of the population, the amount of various wastewaters generated in livestock complexes, food treatment plants, sewage treatment plants, wastewater treatment plants, manure treatment plants, and industrial complexes is increasing rapidly. In particular, as non-traditional oil fields and gas field projects, such as shale gas, coal seam methane gas and dense gas, which have low exploration risks and huge reserves, are emerging, interest in the treatment of wastewater generated during the development of non-conventional oil fields and gas fields is increasing. . The recovery of shale gas is accompanied by extensive drilling and hydraulic fracturing. The flow back water contains various environmental pollutants, TDS (Total Dissolved Solids), heavy metals, salts, organics, natural radioactive materials, petroleum compounds, bacteria, etc. Water treatment process is essential as it exists. In the case of neglected management of the water treatment process, pollution of the groundwater, groundwater, water-containing layer, etc., caused by various pollutants can have a huge impact on humans as well as the environment.

In general, physical, chemical, and biological methods are used in the treatment of solids, organics, nitrogen, phosphorus, and the like contained in wastewater. Conventional wastewater treatment equipment aggregates and precipitates solids such as inorganic matter by using a physical treatment facility equipped with a screen or a settler for removing solids such as suspended solids, sand, and contaminants by filtration or sedimentation. It has a chemical treatment facility for removal and a biological treatment facility for treating organic matter, nitrogen and phosphorus using nitrification and denitrification. However, in the conventional wastewater treatment apparatus, since the wastewater is treated in a state in which the wastewater stays in the tank for a long time, the total time taken is about 7 to 10 hours, and the tank continues to contain the wastewater. Because there was a problem that the tank is large. In addition, this has caused a problem that takes a lot of time and money in the installation of the wastewater treatment apparatus.

Embodiments of the present invention are to purify the fluid efficiently by maximizing the aggregation effect of the contaminants in the fluid by using the underwater plasma discharge device and the flocculant.

According to an aspect of the present invention, the plasma processing unit for generating a radical (radical) by generating a plasma discharge inside the fluid to promote the aggregation of contaminants in the fluid; And a coagulant supply unit for supplying a coagulant inside the fluid to agglomerate contaminants in the fluid.

The plasma processing unit may generate a plasma discharge for a time sufficient to charge negatively charged oxidants inside the fluid to a positive charge.

The flocculant may include one or more of an inorganic flocculant, a polymer flocculant and a natural flocculant.

The natural coagulant, feldspar (NaAlSiO, CaAlSiO), zeolite _{(Mn / 2O · Al 2 O} 3 · xSiO 2 · yH 2 O), silicon dioxide (SiO _2), calcium carbonate (CaCO _3), calcium hydroxide (Ca (OH ) ₂ ), aluminum oxide (Al ₂ O ₃ ), magnesium oxide (MgO), iron oxide (Fe ₂ O ₃ ), titanium dioxide (TiO ₂ ), potassium tetrafluorophosphate (K ₂ SiF ₆ ), calcium chloride (CaCl ₂ ) And barium chloride (BaCl ₂ ).

The hybrid water treatment system may further include an agitator configured to agitate the fluid supplied with the flocculant to generate agglomerated aggregates of the pollutants.

The hybrid water treatment system may further include a precipitation unit for inducing the precipitation of the aggregate by stirring the fluid containing the aggregate at a rate lower than the stirring speed of the stirring portion.

The hybrid water treatment system may further include a separation unit for separating the precipitated aggregates.

The plasma processing unit, a power supply for supplying power; A voltage converter which receives the power supplied from the power supply and converts the power into an AC power, DC power or pulse power having a voltage of a predetermined magnitude; And a voltage amplifier configured to amplify the voltage of the power supplied from the voltage converter.

The plasma processing unit may further include a discharge unit generating pulse discharge or capillary discharge in the fluid from the power amplified by the voltage amplifier.

The plasma processing unit may further include a gas supply unit supplying an auxiliary gas including at least one of ozone, oxygen, nitrogen, argon, helium, and air into the fluid.

In addition, according to another aspect of the invention, generating a radical (radical) by generating a plasma discharge inside the fluid to facilitate the aggregation of contaminants in the fluid; And supplying a flocculant into the fluid to agglomerate contaminants within the fluid.

Generating radicals by generating a plasma discharge inside the fluid may cause the plasma discharge for a time sufficient to charge the negatively charged oxidants inside the fluid with a positive charge.

The hybrid water treatment method may further include agitating the fluid supplied with the flocculant to generate agglomerated aggregates of the pollutants.

The hybrid water treatment method may further include the step of inducing the precipitation of the aggregate by stirring the fluid containing the aggregate at a rate lower than the stirring rate for producing the aggregate.

The hybrid water treatment method may further include separating the precipitated aggregates.

Generating radicals by generating a plasma discharge inside the fluid may include supplying power; Receiving the supplied power and converting the power into an AC power supply, a DC power supply, or a pulse power supply having a voltage having a predetermined magnitude; And amplifying the voltage of the converted power source.

Generating radicals by generating plasma discharge in the fluid may further include generating pulse discharge or capillary discharge in the fluid from the amplified power source.

Generating radicals by generating a plasma discharge inside the fluid may further include supplying an auxiliary gas including one or more of ozone, oxygen, nitrogen, argon, helium, and air into the fluid.

According to embodiments of the present invention, by generating an underwater plasma discharge inside the fluid and supplying a flocculant, the aggregation rate of the contaminants in the fluid is greatly increased as compared with the case of generating only an underwater plasma discharge or supplying only the flocculant inside the fluid. Can be improved. In addition, as the aggregation rate of the contaminants is improved, the water treatment time and cost can be minimized, thereby miniaturizing the water treatment system.

In addition, according to the embodiments of the present invention, the ionic components inside the flocculant simultaneously perform charge neutralization and pH neutralization, and sulfides, salts, organic fine particles, etc., as well as heavy metals such as cadmium, copper, zinc, lead, arsenic, and nickel. Non-metallic mine emissions can be aggregated and reduced.

In addition, according to embodiments of the present invention, it is possible to increase the dissolved oxygen amount (DO) in the fluid, to reduce the chemical oxygen demand (COD), biological oxygen demand (BOD), suspended solids (SS) and odor, It can promote and stabilize the activity of aerobic microorganisms.

1 is a view for explaining a hybrid water treatment system according to an embodiment of the present invention

2 is a block diagram illustrating a plasma processing unit according to an embodiment of the present invention.

3 is a view for explaining the precipitation effect and sterilization effect inside the fluid according to the plasma discharge in the plasma processing unit according to an embodiment of the present invention

4 is a view for explaining the cohesion efficiency of the inside of the fluid in the flocculant supply unit according to the plasma treatment time of the plasma processing unit according to an embodiment of the present invention

5 is a view for explaining the treatment efficiency of heavy metal inside the fluid according to the supply of flocculant in the flocculant supply unit according to an embodiment of the present invention

6 is a flowchart illustrating a hybrid water treatment method according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, this is only an exemplary embodiment and the present invention is not limited thereto.

In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or an operator. Therefore, the definition should be made based on the contents throughout the specification.

The technical spirit of the present invention is determined by the claims, and the following embodiments are merely means for effectively explaining the technical spirit of the present invention to those skilled in the art to which the present invention pertains.

1 is a view for explaining a hybrid water treatment system 100 according to an embodiment of the present invention. As shown in FIG. 1, the hybrid water treatment system 100 according to an exemplary embodiment of the present invention includes a plasma treatment unit 102, a flocculant supply unit 104, a stirring unit 106, a precipitation unit 108, and a separation unit ( 110).

The plasma processor 102 generates a plasma discharge in the fluid to generate radicals. Here, the fluid may be, for example, sewage, wastewater, and sewage discharged from various industrial facilities or agricultural facilities such as homes, factories, concentrated industries, etc., and stored or flowed into the water tank 112 as shown in FIG. 1. Can be. The plasma processing unit 102 generates a plasma discharge for a time sufficient to charge the negatively charged oxidants in the fluid to the positive charge. As will be described later, a flocculant is supplied into the fluid, and the plasma processing unit 102 generates plasma by generating plasma within the fluid to promote aggregation of contaminants in the fluid. The plasma processing unit 102 may cause a plasma discharge in the fluid before supplying the coagulant to the fluid in the coagulant supply unit 104, which will be described later. In contrast, the coagulant supply unit 104 supplies the coagulant to the fluid and then, It may also cause plasma discharge. In addition, the plasma processing unit 102 may generate a plasma discharge in the fluid at the same time as the coagulant supply unit 104 supplies the coagulant into the fluid. That is, the process of causing the plasma processing unit 102 to generate a plasma discharge in the fluid and the process of supplying the coagulant into the fluid in the coagulant supply unit 104 are not particularly limited in the order, and may be performed simultaneously or sequentially.

2 is a block diagram illustrating a plasma processing unit 102 according to an embodiment of the present invention. As shown in FIG. 2, the plasma processor 102 according to an embodiment of the present invention includes a power supply unit 202, a voltage converter 204, a voltage amplifier 206, a discharge unit 208, and a gas supply unit. And 210.

The power supply unit 202 supplies power (eg, commercial AC power) to the voltage converter 204.

The voltage converter 204 receives the power supplied from the power supply unit 202 and converts the power into an AC power supply, a DC power supply, or a pulse power supply having a voltage having a predetermined size. The voltage converter 204 may be configured to include a circuit such as a voltage regulator as necessary.

The voltage amplifier 206 amplifies the voltage of the power supplied from the voltage converter 204. The magnitude of the voltage amplified by the voltage amplifier 206 may be appropriately set according to the nature of the fluid to be purified.

The discharge unit 208 generates pulse discharge or capillary discharge in the fluid from the power amplified by the voltage amplifier 208. The discharge unit 208 may include at least one of a pulse discharge electrode (not shown) for generating a pulse discharge and a capillary discharge electrode (not shown) for generating a capillary discharge. The discharge unit 208 may generate a high voltage pulse signal from the power amplified by the voltage amplifier 206 to cause pulse discharge in the fluid. In addition, the discharge unit 208 may rectify the power amplified by the voltage amplifier 206 to generate a half-wave rectified signal, and may cause capillary discharge in the fluid. In addition, the discharge unit 208 may be provided with a pulse discharge electrode and a capillary discharge electrode at the same time, in this case it can maximize the fluid purification effect by causing the pulse discharge and capillary discharge to occur simultaneously or sequentially.

The gas supply unit 210 supplies an auxiliary gas including one or more of ozone, oxygen, nitrogen, argon, helium, and air into the fluid. For example, the gas supply part 210 may penetrate the inside of the pulse discharge electrode or the capillary discharge electrode in the longitudinal direction to supply the auxiliary gas into the fluid. As such, when the auxiliary gas is supplied into the fluid, the concentration of the active species in the fluid and the residence time in the fluid may be increased as compared with the case where the auxiliary gas is not supplied, thereby maximizing the fluid purification effect by the plasma. Plasma processing unit 102 according to an embodiment of the present invention may generate a plasma discharge by using any one of the capillary discharge, pulse discharge and gas channel discharge method or a combination of these methods, and is not limited to a specific discharge method. .

Meanwhile, radicals of reactive species such as OH, O, H, H ₂ O ₂ , HO ₂ , Cl, and HCl are generated in the fluid by the plasma discharged by the discharge unit 208. The discharge increases the residence time of these radicals in the fluid and increases the internal activation energy by the active species, thereby improving the reaction rate of the flocculant as will be described later. Therefore, the aggregation rate and removal rate of the contaminants in the fluid can be improved by 30% or more as compared with the case of using only the flocculant as in the prior art.

Specifically, heavy metals, iron (Fe), manganese (Mn), zinc (Zn), aluminum (Al), calcium (Ca), potassium (K), copper (Cu), etc. in the fluid are hydroxide bases of water. (OH ^-) melting the water reacts with and at the same time emits electrons acidified water, oxidant FeO _4, Zn (OH) exists in the form of _2, Al ₂ O _3, CaO, KMnO _4, CuO do. These oxidants are negatively charged and are dispersed and suspended by mutual repulsive force. At this time, when a plasma discharge is generated in the fluid, the negatively charged oxidants are converted into positively charged oxidants as shown in Formula 1 below, and the water is decomposed so that the positively charged oxidizers coagulate with each other. the amount of OH ^- and create it.

[Formula 1]

_{^{H 2 O → H + + OH}} * + e -

2OH ^* → H ₂ O ₂

Mn, Ca, Fe, Zn, Cu, K → Mn ⁺ , Ca ⁺ , Fe ⁺ , Zn ⁺ , Cu ⁺ , K ⁺

These coagulants may aggregate contaminants in the fluid, and after a certain time, the contaminants in the fluid grow into aggregates and become precipitates. In addition, the above-described underwater plasma discharge may perform a water purification function by sterilizing harmful bacteria in the fluid.

3 is a view for explaining the precipitation effect and the sterilization effect in the fluid according to the plasma discharge in the plasma processing unit 102 according to an embodiment of the present invention.

As shown in FIG. 3A, when plasma discharge is generated inside the fluid, brown MnO ₂ precipitates after about 20 minutes. That is, the underwater plasma discharge has an excellent effect on the precipitation of inorganic matter inside the fluid. In addition, as shown in Figure 3b, after removing the precipitated MnO ₂ and the plasma discharge in the fluid in the state of developing the residual manganese, it can be confirmed that more than 95% of the residual manganese is removed after about 10 minutes. there was. That is, the underwater plasma discharge not only precipitates the inorganic material inside the fluid, but also has the effect of purifying it.

1, the coagulant supply unit 104 supplies a coagulant inside the fluid to agglomerate contaminants in the fluid. As described above, contaminants in the fluid may be precipitated or purified even through underwater plasma discharge. However, such an underwater plasma discharge takes a relatively long time to form agglomerates, and there is a problem in that the operation cost is high because the power consumption is high. In addition, even when only a flocculant is supplied into the fluid without a separate underwater plasma discharge treatment, contaminants in the fluid may be aggregated. However, in this case, it takes a long time for the flocculant to flocculate the contaminants. Accordingly, embodiments of the present invention maximize the agglomeration effect of contaminants in the fluid by supplying a coagulant to the fluid and simultaneously performing the plasma discharge treatment. In addition, as described above, since the underwater plasma discharge takes a long time to form an aggregate and consumes a lot of power, the plasma processing unit 102 may charge the negatively charged oxidants inside the fluid to the positively charged oxidants. Configured to generate a plasma discharge for as long as possible (eg, about 30 seconds), whereby the coagulant supplied from the coagulant supply 104 reacts with the positively charged oxidant and OH ⁻ in the fluid. As a result, the time taken to aggregate the pollutants can be greatly shortened.

The flocculant may include one or more of an inorganic flocculant, a polymer flocculant and a natural flocculant. The inorganic flocculant may be, for example, aluminum sulfate (Al ₂ (SO ₄ ) ₃ ), ferric sulfate (Fe ₂ (SO ₄ ) ₃ ), ferric chloride (FeCl ₃ ), polyaluminum chloride (PAC), or the like. have. Aluminum sulfate has the disadvantages of being corrosive, non-irritating, easy to handle and without coloring phenomenon, while having a cohesive pH range of only 5.5 to 8.5 and a light floc. Ferric sulfate has a disadvantage in that the aggregates are heavy, have good sedimentation properties, are relatively inexpensive, and have a wide pH range, and are highly corrosive and iron ions remain. Iron chloride has a disadvantage in that aggregates are heavy and have good settling properties, but coloration occurs in facilities and wastewater and requires careful handling. Polyaluminum chloride has a tendency to form agglomerates and has good efficiency while having an expensive disadvantage. In addition, the polymer flocculant has a disadvantage of being expensive while increasing the formation of aggregates.

Natural coagulant feldspar (NaAlSiO, CaAlSiO), zeolite _{(Mn / 2O · Al 2 O} 3 · xSiO 2 · yH 2 O), silicon dioxide (SiO _2), calcium carbonate (CaCO _3), calcium hydroxide (Ca (OH) ₂ ), Aluminum oxide (Al ₂ O ₃ ), magnesium oxide (MgO), iron oxide (Fe ₂ O ₃ ), titanium dioxide (TiO ₂ ), potassium tetrafluorophosphate (K ₂ SiF ₆ ), calcium chloride (CaCl ₂ ) and It may include one or more of barium chloride (BaCl ₂ ), it may be prepared through the following process. First, wort ocher 17-23wt%, calcite 9-11wt%, waste shell 9-11wt%, limestone 9-11wt%, feldspar filter 17-23wt%, zeolite 9-11wt%, germanium 6-8wt%, brown salt stone 6-8wt%, calcite 5-7wt% crushed and milled to obtain a fine powder, 0.1 ~ 5wt% K ₂ SiF ₆ and 10 ~ 15wt% CaCl ₂ and BaCl ₂ of the total powder to the powder Are sequentially added and calcined at 600 ° C. for 5 hours in a heating furnace. Next, the calcined powder is acid treated with citric acid at 60 ° C. for 2 hours to be milled into fine powder. Subsequently, the milled powder is selected using only a powder of 10 μm or less using a cyclone, and the selected powder is put into pure water and stirred by rotating at high speed. As described above, when the negatively charged oxidants inside the fluid are positively charged through the underwater plasma discharge, the contaminant aggregation rate and removal rate of the flocculant supplied inside the fluid may be improved by 30% or more. Formula 2 below is a chemical formula showing a process of depositing aluminum ions, calcium ions, sulfate ions, carbonate ions, magnesium ions, lead ions, phosphate ions and the like dissolved in the fluid when the above-mentioned flocculant is supplied into the fluid.

[Formula 2]

(1) Precipitation of aluminum (Al ³⁺ ) ions

Al ₂ (SO ₄ ) ₃ + 3Ca (HCO ₃ ) ₂ → 2Al (OH) ₃ ↓ + CaSO ₄ + 6CO ₂

(2) Calcium ion (Ca ²⁺ ) precipitation

2FeCl ₃ + 3Ca (HCO ₃ ) ₂ → 2Fe (OH) ₃ ↓ + 3CaCl ₂ + 6CO ₂ ↑

Fe (HCO ₃ ) ₂ + 2Ca (OH) ₂ → Fe (OH) ₂ ↓ + 2CaCO ₃ ↓ + 2H ₂ O

H ₂ CO ₃ + Ca (OH) ₂ → CaCO ₃ ↓ + 2H ₂ O

(3) Precipitation of Sulfate Ion (SO ₄ ^2- )

Na ₂ SO ₄ + BaCl ₂ → 2NaCl + BaSO ₄ ↓

Na2SO4 + CaCl2 → 2NaCl + CaSO ₄ ↓

(4) Precipitation of Carbonate Ion (CO ₃ ^2- )

Na ₂ CO ₃ + BaCl ₂ → 2NaCl + BaCO ₃ ↓

Na ₂ CO ₃ + CaCl ₂ → 2NaCl + CaCO ₃ ↓

(5) Precipitation of Magnesium Ion (Mg ²⁺ )

2Ca (OH) ₂ + Mg (HCO ₃ ) ₂ → 2CaCO ₃ ↓ + Mg (OH) ₂ ↓ + 2H ₂ O

(6) precipitation of lead ions (Pb ²⁺ )

KI + Pb (NO ₃ ) ₂ → KNO ₃ + PbI ₂ ↓ (yellow pigment)

Na ₂ S + Pb (NO ₃ ) ₂ → ₂ NaNO ₃ + PbS ↓ (Black pigment)

(7) Precipitation of Phosphate Ion (PO ₄ ^3- )

10Ca ²⁺ + 6PO ₄ ^3- + 2OH- → Ca ₁₀ (PO ₄ ) ₆ (OH) ₂ ↓

Al ³⁺ + HnPO ₄ ^3-n → AlPO ₄ ↓ + nH ⁺

Fe ³⁺ + HnPO ₄ ^3-n → FePO ₄ ↓ + nH ⁺

On the other hand, as shown in Figure 1, according to the embodiments of the present invention by driving a separate diffuser device 114 so that the aeration is sufficient before the flocculant supply unit 104 in the flocculant supply unit 104 to coagulate the fine particles in the fluid You can talk. This facilitates the digestive action by aerobic microorganisms and can purify the fluid by removing carbon dioxide, hydrogen sulfide, and methane gas.

4 is a view for explaining the cohesive efficiency of the inside of the fluid in the coagulant supply unit 104 according to the plasma processing time of the plasma processing unit 102 according to an embodiment of the present invention. As shown in FIG. 4, when only the flocculant was supplied to the fluid without plasma discharge treatment, the time taken for the contaminants in the fluid to agglomerate was 7 minutes and 3 seconds. However, in the case where a coagulant is administered after generating a plasma discharge for 30 seconds or 60 seconds through the plasma processing unit 102 described above, the time taken for the contaminants in the fluid to aggregate is drastically reduced to 3 minutes 30 seconds. That is, when the flocculant is supplied into the fluid in which the radicals are generated by generating the plasma discharge underwater, the aggregation rate of the contaminants in the fluid is greatly improved as compared with the case of generating only the plasma discharge inside the fluid or only supplying the flocculant. I could confirm that.

5 is a view for explaining the treatment efficiency of heavy metal in the fluid according to the coagulant supply in the coagulant supply unit 104 according to an embodiment of the present invention. As shown in FIG. 5, when a flocculant is supplied into a fluid in which radicals are generated by generating an underwater plasma discharge, heavy metals such as cadmium, copper, zinc, lead, arsenic, and nickel may be rapidly aggregated and reduced. That is, according to embodiments of the present invention, it is possible to maximize the efficiency of heavy metal adsorption capacity in the fluid. In addition, the ionic components inside the flocculant simultaneously perform charge neutralization and pH neutralization, and can aggregate and reduce not only heavy metals but also nonmetallic mine emissions such as sulfides, salts and organic fine particles. In addition, the hybrid water treatment system 100 may increase the amount of dissolved oxygen (DO) in the fluid, and may reduce chemical oxygen demand (COD), biological oxygen demand (BOD), suspended solids (SS), and odor, and may also reduce aerobic microorganisms. Can promote and stabilize their activity.

1 again, the stirring unit 106 agitates the fluid supplied with the flocculant to produce agglomerated aggregates of contaminants. The stirring unit 106 may generate agglomerates by, for example, driving the fluid supplied with the coagulant at high speed by driving the first agitator 116-1 installed in the water tank 112. Since the first stirrer 116-1 stirs the fluid at high speed, aggregates inside the fluid may flow forward through the upper side of the water tank 112. Here, the front means a direction that the first stirrer 116-1 faces.

The precipitation unit 108 may induce the precipitation of the aggregate by stirring the fluid containing the aggregate at a lower speed than the stirring speed of the stirring unit 106. At this time, the precipitation unit 108, for example, through the second stirrer 116-2 can induce the precipitation of the aggregates to the lower side of the inclined plate 118 installed inclined inside the water tank 112 containing the fluid. have. The second stirrer 116-2 may be installed to face the inclined plate 118 installed to be inclined in the water tank 112. Agglomerates are prevented from rising above the inclined plate 118 due to its weight and may not be further moved forward by the inclined plate 118 and may be settled below the water tank 112. On the other hand, the fluid flows forward through the inclined plate 118.

Separation unit 110 separates the aggregates precipitated below the water tank (112). The separation unit 110 may separate the aggregates precipitated below the inclined plate 118 by driving a suction device (not shown) installed below the water tank 112.

The plasma processing unit 102 generates plasma by generating a plasma discharge in the fluid (S602). As described above, the plasma processing unit 102 generates a plasma discharge for a time sufficient to charge the negatively charged oxidants in the fluid to the positive charge. Here, the plasma processing unit 102 may generate a plasma discharge by using any one of capillary discharge, pulse discharge, and gas channel discharge schemes or by combining these schemes, and is not limited to a specific discharge scheme.

The coagulant supply unit 104 aggregates the contaminants in the fluid by supplying a coagulant in the fluid (S604). As described above, contaminants in the fluid may be precipitated or purified through the underwater plasma discharge in the plasma processing unit 102. However, such an underwater plasma discharge takes a relatively long time to form agglomerates, and there is a problem in that the operation cost is high because the power consumption is high. Accordingly, embodiments of the present invention maximize the agglomeration effect of contaminants in the fluid by supplying a coagulant to the fluid and simultaneously performing the plasma discharge treatment. The plasma processing unit 102 is configured to generate a plasma discharge for a time (eg, 30 seconds) long enough to charge the negatively charged oxidants into the positively charged oxidizers in the fluid, thereby forming a flocculant. The reaction time of the flocculant supplied from the supply part 104 reacts with the positively charged oxidant and OH ⁻ to greatly shorten the time taken for the contaminant to aggregate. The flocculant may include one or more of an inorganic flocculant, a polymer flocculant and a natural flocculant. Here, the natural coagulant is feldspar (NaAlSiO, CaAlSiO), zeolite _{(Mn / 2O · Al 2 O} 3 · xSiO 2 · yH 2 O), silicon dioxide (SiO _2), calcium carbonate (CaCO _3), calcium hydroxide (Ca (OH ) ₂ ), aluminum oxide (Al ₂ O ₃ ), magnesium oxide (MgO), iron oxide (Fe ₂ O ₃ ), titanium dioxide (TiO ₂ ), potassium tetrafluorophosphate (K ₂ SiF ₆ ), calcium chloride (CaCl ₂ ) And barium chloride (BaCl ₂ ). As described above, in case of supplying a flocculant into a fluid generating radical plasma by generating an underwater plasma discharge, the aggregation rate of the contaminants in the fluid is increased as compared with the case of generating only an underwater plasma discharge or supplying only a flocculant into the fluid. Can be greatly improved. On the other hand, step S602 and step S604 may be performed simultaneously or sequentially, without being particularly limited in order.

The stirring unit 106 agitates the fluid supplied with the flocculant to generate agglomerated aggregates of the contaminants (S606). For example, the stirring unit 106 may drive the first stirrer 116-2 installed inside the water tank 112 to stir the fluid supplied with the coagulant at high speed to generate the aggregate.

The precipitation unit 108 induces precipitation of the aggregate by stirring the fluid containing the aggregate at a rate lower than the stirring speed for generating the aggregate (S608). The precipitation unit 108 may induce precipitation of the aggregates, for example, to the lower side of the inclined plate 118 installed inclined inside the water tank 112 including the fluid.

Separation unit 110 separates the aggregates precipitated below the inclined plate 118 by the precipitation unit 108 (S610). The separation unit 110 may separate the aggregates precipitated below the inclined plate 118 by driving a suction device (not shown) installed below the water tank 112. Through the method as described above, it is possible to quickly aggregate contaminants in the fluid, and to efficiently purify the fluid and discharge it to the outside.

Although the present invention has been described in detail with reference to exemplary embodiments above, those skilled in the art to which the present invention pertains can make various modifications without departing from the scope of the present invention with respect to the above-described embodiments. Will understand. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

100: hybrid water treatment system

102: plasma processing unit

104: flocculant supply unit

106: stirring section

108: settling section

110: separator

112: tank

114: diffuser device

116-1: First Agitator

116-2: second stirrer

118: inclined plate

202: power supply

204: voltage conversion unit

206: voltage amplifier

208: discharge part

210: gas supply unit

Claims

A plasma processing unit generating a radical by generating a plasma discharge in the fluid to promote aggregation of contaminants in the fluid; And

And a coagulant supply unit for supplying a coagulant inside the fluid to agglomerate contaminants in the fluid.
The method of claim 1,

And the plasma processing unit generates a plasma discharge for a time sufficient to charge negatively charged oxidants inside the fluid to a positive charge.
The method of claim 1,

Wherein said flocculant comprises at least one of an inorganic flocculant, a polymeric flocculant and a natural flocculant.
The method of claim 3,

The natural coagulant, feldspar (NaAlSiO, CaAlSiO), zeolite (Mn / 2O · Al 2 O 3 · xSiO 2 · yH 2 O), silicon dioxide (SiO 2), calcium carbonate (CaCO 3), calcium hydroxide (Ca (OH ) 2 ), aluminum oxide (Al 2 O 3 ), magnesium oxide (MgO), iron oxide (Fe 2 O 3 ), titanium dioxide (TiO 2 ), potassium tetrafluorophosphate (K 2 SiF 6 ), calcium chloride (CaCl 2 ) And barium chloride (BaCl 2 ).
The method of claim 1,

And a stirrer for agitating the fluid supplied with the flocculant to produce agglomerated aggregates of the contaminants.
The method of claim 5,

The hybrid water treatment system further comprises a precipitation unit for inducing the precipitation of the aggregate by stirring the fluid containing the aggregate at a rate lower than the stirring speed of the stirring portion.
The method of claim 6,

The hybrid water treatment system further comprises a separator for separating the precipitated precipitate.
The method of claim 1,

The plasma processing unit,

A power supply unit supplying power;

A voltage converter which receives the power supplied from the power supply and converts the power into an AC power, DC power or pulse power having a voltage of a predetermined magnitude; And

And a voltage amplifier configured to amplify the voltage of the power supplied from the voltage converter.
The method of claim 8,

The plasma processing unit,

And a discharge unit for generating pulse discharge or capillary discharge inside the fluid from the power amplified by the voltage amplifier.
The method of claim 9,

The plasma processing unit,

And a gas supply for supplying an auxiliary gas comprising at least one of ozone, oxygen, nitrogen, argon, helium and air into the fluid.
Generating a radical by generating a plasma discharge within the fluid to facilitate aggregation of contaminants within the fluid; And

Supplying a flocculant into the fluid to agglomerate contaminants within the fluid.
The method of claim 11,

Generating plasma by generating a plasma discharge in the fluid,

And generating a plasma discharge for a time sufficient to charge negatively charged oxidants inside the fluid to a positive charge.
The method of claim 11,

And the coagulant comprises at least one of an inorganic coagulant, a polymer coagulant, and a natural coagulant.
The method of claim 13,

The natural coagulant, feldspar (NaAlSiO, CaAlSiO), zeolite (Mn / 2O · Al 2 O 3 · xSiO 2 · yH 2 O), silicon dioxide (SiO 2), calcium carbonate (CaCO 3), calcium hydroxide (Ca (OH ) 2 ), aluminum oxide (Al 2 O 3 ), magnesium oxide (MgO), iron oxide (Fe 2 O 3 ), titanium dioxide (TiO 2 ), potassium tetrafluorophosphate (K 2 SiF 6 ), calcium chloride (CaCl 2 ) And barium chloride (BaCl 2 ).
The method of claim 11,

Stirring the fluid supplied with the flocculant to produce agglomerated aggregates of the contaminants.
The method of claim 15,

And inducing the precipitation of the aggregate by stirring the fluid containing the aggregate at a rate lower than the stirring rate for producing the aggregate.
The method of claim 16,

Separating the precipitate aggregated further, hybrid water treatment method.
The method of claim 11,

Generating plasma by generating a plasma discharge in the fluid,

Supplying power;

Receiving the supplied power and converting the power into an AC power supply, a DC power supply, or a pulse power supply having a voltage having a predetermined magnitude; And

Amplifying the voltage of the converted power source.
The method of claim 18,

Generating plasma by generating a plasma discharge in the fluid,

Generating a pulse discharge or a capillary discharge in the fluid from the amplified power source.
The method of claim 19,

Generating plasma by generating a plasma discharge in the fluid,

Supplying an auxiliary gas comprising at least one of ozone, oxygen, nitrogen, argon, helium and air into the fluid.