KR20170093083A - Electro-coagualation unit for wastewater treatment and electricity generation, and apparatus including the same - Google Patents

Abstract

An electric aggregation unit for wastewater treatment and electricity generation, according to an embodiment of the present invention, comprises: a metal anode and an air cathode spaced apart from each other so that a wastewater passage space through which wastewater containing ammonia nitrogen, phosphate and an electrolyte pass is provided; and a conducting wire part physically connecting the metal anode and the air cathode outside the wastewater passage space and having a predetermined resistance, thereby being capable of wastewater treatment and electricity generation simultaneously.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric coagulation unit capable of treating wastewater, and an electric coagulation unit for wastewater treatment and electricity generation,

The present invention relates to a power generation type electrocoagulation unit capable of wastewater treatment and a power generation type electrocoagulation apparatus capable of treating wastewater containing the same.

There are various biological methods and physico - chemical methods to remove phosphorus and nitrogen contained in wastewater, but all methods have difficulty in maintaining removal efficiency, and it takes a lot of expense.

The method of removing phosphorus and nitrogen present in wastewater in the form of struvite and its analogue form can effectively remove phosphorus and nitrogen simultaneously and the generated struvite is a Slow-Release Fertilizer which has high reuse value .

Persistent fertilizer refers to a fertilizer that is not toxic to plants and that does not oxidize for a long time and that has a long lasting effect.

The study of struvite crystallization conducted overseas has shown that the recovery by Struvite precipitation in a stirred reactor of S. Regy et al. (2001), the operation and sale of struvite recovered at Ueno and Fujii's real-scale sewage treatment plant 3 years experience (2001), EV (2001), the potential for struvite recovery in sewage treatment operations (SAPSONS) (2001), the US patent of Trentelman No. 4,389,317, Tsunekawa et al., Japanese Patent No. 11-267665, and various attempts have been made to remove phosphorus and / or nitrogen in the form of struvite, but most mention that the addition of an alkaline agent is required to raise the pH .

Also, as a domestic Struvite crystallization study, Korean Patent Laid-Open No. 10-2002-0005521 discloses a process for preparing a continuous batch reactor in which all reaction vessels such as a flocculant for Struvite sedimentation, an alkali mixing bath, a struvite crystal reaction, Korean Patent Laid-Open No. 10-2000-0019613 discloses an apparatus for treating animal wastewater containing livestock manure or industrial wastewater containing high concentration phosphorus by Struvite precipitation, wherein phosphorus and magnesium are injected and the pH is adjusted to 10.7 to form struvite Korean Unexamined Patent Application Publication No. 10-2004-0070408 discloses a method for purifying high-concentration nitrogen-containing wastewater which is filtered through an ultrafiltration membrane. The method includes a solid-liquid separation tank, an organic matter adsorption tank, a crystallization tank for producing struvite crystals in a pH of 8 to 12, A crystallization storage tank, a treatment method of wastewater containing nitrogen and phosphorus composed of a filtration membrane, and Korean Patent Laid-Open No. 10-2003-0076548, A method of purifying wastewater containing highly concentrated nutrients comprising an organic material adsorption step for removing organic matter, a Struvite crystallization step for producing struvite by injecting a pH adjusting agent and magnesium, and a denitrification step is disclosed in Korean Patent Laid- 0034299 discloses a struvite crystal inlet portion for supplying air and raw water, Mg, PO 4, an alkaline agent, a Struvite crystallization portion of nitrogen and phosphorus, a propeller for inducing fluid centrifugal force, a hydraulic type solid-liquid separator, A sludge hopper, a sludge hopper, an effluent water outlet, and a wastewater containing a high concentration of phosphorus are disclosed in Korean Patent Laid-open Publication No. 10-2004-0028273, which discloses a solid-liquid separation process for separating solids, , A high-concentration nitrogen / phosphorus-containing wastewater consisting of a struvite crystallization process that removes nitrogen and phosphorus, and an intermittent aeration process in which nitrification and denitrification are oxidized A treatment method is disclosed in Korean Patent Laid-Open No. 10-2006-0118291, which comprises an inlet for supplying wastewater to be treated, a magnesium compound, a phosphoric acid compound and an alkali agent, a struvite crystallization tank, a first settling tank, a calcium supply tank, Korean Patent Laid-Open No. 10-2006-0129452 discloses a wastewater treatment apparatus comprising a pH control system for controlling pH 7.4 to 8.5 by adding an alkali agent, a plurality of sections for removing phosphorus and nitrogen from the wastewater by struvite pellet In the disclosed fluidized bed reaction apparatus, Korean Patent Laid-Open No. 10-2006-0099009 does not mention pH adjustment, but it does not disclose a method of improving the nitrogen removal efficiency composed of a flow rate adjusting tank, a Struvite crystallization tank, a primary settling tank, A method for crystallizing truvite is disclosed.

 Many researchers report that the optimum pH for struvite formation is about 8-10 and the optimal pH is about 9.0-9.2.

However, most of the struvite manufacturing techniques developed so far use an alkaline agent to raise the pH, and it is difficult to raise the pH to 9 or more because it is difficult to cope with the value of NaOH. In order to increase the size of the crystals produced, And air should be blown to float the solids.

In addition, most of the struvite fabrication techniques developed so far have many problems in terms of efficient power consumption.

An object of an embodiment of the present invention is to provide a power generation type electrocoagulation unit capable of effectively removing phosphorus and nitrogen contained in wastewater and capable of producing power and capable of treating wastewater, Device.

A power generation type electrocoagulation unit capable of treating wastewater according to an embodiment of the present invention is characterized in that the wastewater is discharged from the wastewater passage space through which the wastewater flows, including ammonia nitrogen, phosphate and an electrolyte, A metal anode and an air cathode which are spaced apart from each other so as to be provided; And a wire portion physically connecting the metal anode and the air cathode outside the wastewater passage space and having a predetermined resistance, wherein the metal anode and the air cathode each include magnesium and carbon cloth, Wherein the metal anode containing magnesium is oxidized so that first electrons are generated to react with magnesium ions and water of the wastewater to generate first hydroxide ions, and the air cathode including the carbon cloth is discharged through the lead portion Wherein the second hydroxide ion reacts with the water in the wastewater and oxygen in the air to generate a second hydroxide ion, wherein the first hydroxide ion and the second hydroxide ion convert the magnesium ion , Struvite (MgHN ₄ PO ₄ 6 H ₂ O) due to the reaction of ammonia nitrogen and phosphate contained in the wastewater is crystallized And contributes to satisfy the pH condition for crystallization of the struvite so that the wastewater can be treated, and the second electrons produce electric power in the process of being moved through the lead portion .

The first hydroxide ion and the second hydroxide ion of the electric power generation type electrocoagulation unit capable of treating wastewater according to an embodiment of the present invention increase the pH of the wastewater flowing into the wastewater passage space, So that it is not necessary to add an additional alkali agent to satisfy the pH condition for crystallization of the bite.

The movement of the second electrons through the lead portion for producing the electric power of the electric power production type electrocoagulation unit capable of wastewater treatment according to an embodiment of the present invention is realized by the electrolyte contained in the wastewater can do.

A power generation type electrocoagulation unit capable of treating wastewater according to an embodiment of the present invention includes a wastewater passage portion defining a size of the wastewater passage space and having the metal anode and the air cathode disposed on one side and the other side, respectively; And an air supply unit disposed on an opposite surface of one side of the air cathode facing the wastewater passage so as to supply the air toward the air cathode from the outside, And an inlet port and an outlet port through which the wastewater flows out, wherein the inlet port is disposed at a lower side relative to the outlet port.

The wastewater passing portion of the power generation type electrocoagulation unit capable of treating wastewater according to an embodiment of the present invention may define a distance between the metal anode and the air cathode.

A power generation type electrocoagulation unit capable of treating wastewater according to an embodiment of the present invention includes a first sealing part disposed between the wastewater passage part and the metal anode and sealing between the wastewater passage part and the metal anode; And a second sealing part disposed between the wastewater passing part and the air cathode to seal between the wastewater passing part and the air cathode.

The air supply unit of the electric power generation type electrocoagulation unit capable of treating wastewater according to an embodiment of the present invention is provided with a predetermined internal space and the air is supplied from the outside to the inside space, And a plurality of air passages communicating with the outside, wherein the plurality of air passages are formed to surround the internal space.

A power generation type electrocoagulation apparatus capable of treating wastewater according to another embodiment of the present invention includes a power generation type electrocoagulation unit capable of wastewater treatment, Wherein the metal anode of the power generation type first electrocoagulation unit capable of treating the wastewater comprises a first electric agglomerating unit capable of producing wastewater and a second electric agglomerating unit capable of treating wastewater, Wherein the air supply part of the second electric coagulation unit of the power generation type capable of treating the wastewater is in contact with the air supply part of the power generation type second electrocoagulation unit, And the air cathode of the second electric agglomerating unit of the power generation type capable of treating the wastewater is electrically connected, . ≪ / RTI >

According to an embodiment of the present invention, there is provided a power generation type electrocoagulation unit capable of treating wastewater, comprising: a wastewater passage portion defining a size of the wastewater passage space; Wherein the air cathode includes a first air cathode and a second air cathode arranged at one side and the other side of the wastewater passage portion, respectively, and the second air cathode and the second air cathode are disposed in the wastewater passage space so as to be divided into a wastewater passage space and a second wastewater passage space, The first air cathode and the second air cathode may share one metal anode disposed in the wastewater passage space.

The metal anode of the power generation type electrocoagulation unit capable of treating wastewater according to an embodiment of the present invention may be detachably coupled to the wastewater passage portion so as to be replaceable due to oxidation.

The electric generation type electrocoagulation unit capable of treating wastewater according to an embodiment of the present invention includes a first air cathode and a second air cathode which are disposed on the opposite surface of one surface of the first air cathode facing the first waste water passage space, A first air supply unit for supplying the air toward the first air supply unit; And a second air supply unit disposed on a surface of the one surface of the second air cathode facing the second waste water passage space to supply the air toward the second air cathode from the outside .

According to another aspect of the present invention, there is provided a power generation type electrocoagulation apparatus capable of treating wastewater, comprising: a power generation type electrocoagulation unit capable of wastewater treatment; And a second electric coagulation unit capable of treating wastewater, wherein the first air coagulation unit and the second air coagulation unit of the power generation type first electrocoagulation unit capable of treating the wastewater, The cathode may be electrically connected to each other by a first conductive line, and the first conductive line may be electrically connected to the metal anode of the second electric agglomerating unit of the power generation type capable of treating the wastewater.

The power generation type electrocoagulation unit capable of treating wastewater according to the present invention and the power generation type electrocoagulation apparatus capable of treating wastewater containing the same can effectively remove phosphorus and nitrogen contained in wastewater.

In addition, it is possible to produce electric power in the process of treating wastewater, and further, it is possible to recover some resource materials from wastewater.

Also, the replacement of specific components can be implemented by a simple method, thereby maximizing convenience.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining a principle of generating electric power by a power generation type electrocoagulation unit capable of wastewater treatment according to an embodiment of the present invention and a principle of treating wastewater. FIG.
FIG. 2 is a view for explaining an oxidation reaction or a reduction reaction by a metal anode and an air cathode provided in a power generation type electrocoagulation unit capable of treating wastewater according to an embodiment of the present invention; FIG.
FIG. 3 is a processing system diagram for explaining that electric power is produced by a power generation type electrocoagulation unit capable of wastewater treatment according to an embodiment of the present invention, and wastewater is treated and struvite can be recovered.
4 is a schematic exploded perspective view for explaining a power generation type electrocoagulation unit capable of treating wastewater according to an embodiment of the present invention.
5A and 5B are schematic perspective views and photographs for explaining a power generation type electrocoagulation apparatus capable of treating wastewater according to another embodiment of the present invention, respectively.
6 is a schematic perspective view for explaining a power generation type electrocoagulation apparatus capable of treating wastewater according to another embodiment of the present invention.
7 is a view for explaining the principle of detachment of a metal anode provided in a power generation type electrophotoconductor capable of treating wastewater according to another embodiment of the present invention.
FIG. 8 is a schematic internal configuration view for explaining a power generation type electrocoagulation apparatus capable of treating wastewater according to another embodiment of the present invention. FIG.
FIGS. 9A and 9B are diagrams showing XRD analysis data and voltage distribution curves for currents when the artificial wastewater is treated by a power generation type electrophoresis apparatus capable of treating wastewater according to the present invention. FIG.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept. Other embodiments falling within the scope of the inventive concept may readily be suggested, but are also considered to be within the scope of the present invention.

The same reference numerals are used to designate the same components in the same reference numerals in the drawings of the embodiments.

FIG. 1 is a view for explaining a principle of generating electric power by a power generation type electrocoagulation unit capable of treating wastewater according to an embodiment of the present invention and a principle of treating wastewater. FIG. 2 is a view for explaining an oxidation reaction or reduction reaction by a metal anode and an air cathode provided in a power generation type electrocoagulation unit capable of treating wastewater according to the present invention.

3 is a processing flowchart for explaining that electric power is produced by a power generation type electrocoagulation unit capable of wastewater treatment according to an embodiment of the present invention, and wastewater is treated and struvite can be recovered.

1 to 3, a power generation type electrocoagulation unit 100 (hereinafter referred to as 'an electrocoagulation unit') capable of treating wastewater according to an embodiment of the present invention includes a metal anode (A) The oxidation or reduction reaction of the air cathode (C) can produce power and simultaneously remove phosphorus and nitrogen contained in the wastewater.

Specifically, the electrocoagulation unit 100 includes a metal anode A and an air cathode C, which are spaced apart from each other so as to provide a wastewater passage space S through which the wastewater W passes, the metal anode A, And a wire portion 102 physically connecting the air cathode C to the outside of the wastewater passage space S and having a predetermined resistance.

Here, the wastewater W passing through the wastewater passage space S may include ammonia nitrogen, phosphate, and an electrolyte. In the course of passing through the wastewater passage space S, Phosphorus and nitrogen contained in the wastewater W can be removed by crystallization of struvite by a specific mechanism.

Specifically, the metal anode (A) and the air cathode (C) may include magnesium (Mg) and carbon cloth, respectively. In the metal anode (A) , And a reduction reaction occurs in the air cathode (C).

In this process, electricity is generated by the generated electrons, and a large amount of hydroxide ions are generated, so that the pH of the wastewater is increased, thereby satisfying the pH condition for crystallization of struvite.

The above process will be described in detail with reference to the drawings.

Referring to FIG. 2, in the metal anode (A) containing magnesium, oxidation reactions such as the first reaction formula and the second reaction formula and a reduction reaction such as the third reaction formula occur, and an air cathode C) is subjected to a reduction reaction as in the following reaction formula (4).

First reaction formula (oxidation reaction at the metal anode): 2 Mg → 2 Mg ^{2 +} + 4 e ^-

Second Reaction Scheme (Oxidation Reaction in Metal Anode): Mg → Mg ^{2 +} + 2e ^-

The third reaction formula (reduction reaction in the metal anode): 2H ₂ O + 2e ^- ? H ₂ + 2OH ^-

○ 4th reaction (reduction reaction at the air cathode): O ₂ + 2H ₂ O + 4e ^- → 4OH ^-

Here, it is noted that the oxidation reaction by the first reaction formula and the oxidation reaction by the second reaction formula are distinguished for the sake of the same oxidation reaction by magnesium, the aspects of electric power production and the wastewater treatment.

The electrons 4e ^- (hereinafter referred to as "second electrons") generated by the oxidation reaction according to the first reaction formula are generated along the conductive portions 102 connecting the metal anode A and the air cathode C And the electric power is produced.

At this time, an electrolyte is required for the flow of the second electrons. In the present invention, the electrolyte itself contained in the wastewater is used instead of the conventionally used high concentration sodium chloride (NaCl).

Generally, the organic wastewater such as livestock wastewater and the reflux water of the sewage treatment process contain ammonia nitrogen of more than 500 ppm and phosphorus of more than 100 ppm. Since the electrolyte contains a relatively high concentration of electrolyte, It is possible to maximize the efficiency by using the electrolyte in the wastewater without using any separate electrolyte.

Moved along the wire 102 to the air cathode (C) of the metal anode (A), the second electron is used in the reduction by the fourth scheme hydroxide ions (4OH ^-, hereinafter referred to as "second hydroxyl ion, ).

On the other hand, the electrons 2e ^- (hereinafter referred to as "first electrons") generated by the oxidation reaction by the second reaction formula are used in the reduction reaction by the third reaction formula to form hydroxide ions (2OH ^- Quot;). ≪ / RTI >

Here, the first hydroxide ion generated by the reaction of the third reaction formula and the second hydroxide ion generated by the reaction of the fourth reaction formula are generated by the reaction of the first reaction formula and the second reaction formula (MgHN ₄ PO ₄ 6 H ₂ O) is crystallized by reacting magnesium ions contained in the waste water with ammonia nitrogen and phosphate contained in the wastewater to treat the wastewater. The pH condition for crystallization of the struvite And will be described in detail below.

Struvite (MgHN ₄ PO ₄ 6 H ₂ O) for removing nitrogen and phosphorus contained in wastewater can be produced by the following reaction formula 5, and the produced struvite is a slow-release fertilizer ) Can be used as a fertilizer that does not show toxicity to plants and shows a continuous effect without long-term oxidation in a single use.

○ The fifth reaction ^{scheme: Mg 2 + + NH 4+ +} HPO 4 2 - + OH - + 5H 2 O → MgNH 4 PO 4 · 6H2O

For the production of struvite to remove the nitrogen and phosphorus contained in the wastewater, hydroxide ions are required, that is to say the pH should be around 8 to 9 under alkaline conditions.

However, since the pH of the wastewater flowing into the wastewater passage space is generally lower than that of the wastewater, a configuration capable of raising the pH to satisfy the pH condition for crystallization of the struvite is required.

For this reason, conventionally, sodium hydroxide (NaOH), which is an alkali agent, is separately added to wastewater which is required to be treated. However, this method causes problems such as an increase in the cost of wastewater treatment.

In the present invention, the above-mentioned problems are not generated at all, that is, the first hydroxide ion generated by the reaction by the third reaction formula and the second hydroxide ion generated by the reaction by the fourth reaction formula, 2 hydroxide ion can satisfy the optimum pH condition for crystallization of struvite.

That is, in the present invention, the pH can be raised during the time that the wastewater stays in the wastewater passage space S by using the metal anode A containing magnesium and the air cathode C containing carbon cloth, So that the crystallization of the bytes can proceed.

FIG. 3 is an exemplary process flow chart for recovering struvite while electric power is produced and waste water is treated by a power generation type electro-coagulation unit capable of wastewater treatment according to an embodiment of the present invention.

FIG. 4 is a schematic exploded perspective view for explaining a power generation type electrocoagulation unit capable of treating wastewater according to an embodiment of the present invention. FIG. 5A and FIG. 1 is a schematic perspective view and a photograph for explaining a power generation type electric coagulation apparatus.

Hereinafter, a power generation type electrocoagulation unit 200 (hereinafter, referred to as an " electrocoagulation unit ") capable of treating wastewater according to the present invention and a power generation type electrocoagulation apparatus 20 The description of the power production principle and the principle of wastewater treatment described with reference to FIGS. 1 to 3 will be omitted.

4, an electrocoagulation unit 200 according to an embodiment of the present invention includes a metal anode A containing magnesium, an air cathode C containing a carbon cloth, (Not shown) physically connecting the air cathode C to the outside of the wastewater passage space S, a wastewater passage 210 defining the size of the wastewater passage space S, And an air supply unit 220 for supplying air toward the air conditioning unit C.

The metal anode A and the air cathode C may be disposed on one side and the other side of the wastewater passage 210 and the supply and supply unit 220 may be disposed on one side of the air cathode C, And may be disposed on the opposite surface of the one side toward the passing portion 210.

The wastewater passing portion 210 may define a distance between the metal anode A and the air cathode C, that is, a width of the wastewater passage space S.

The wastewater passing portion 210 includes an inlet 212 for flowing wastewater passing through the wastewater passing space S into the wastewater passing space S and an outlet 212 for flowing out from the wastewater passing space S to the outside. (214), and the inlet (212) may be disposed relatively lower than the outlet (214).

This is for securing the time for the wastewater to stay in the wastewater passage space S, and securing the residence time allows time for the series of reactions described with reference to Figs. 1 to 3 to be secured.

The number of the inlet 212 and the number of the outlet 214 are not particularly limited and can be variously changed according to the intention of a person skilled in the art.

The electrocoagulation unit 200 according to an embodiment of the present invention is disposed between the wastewater passing portion 210 and the metal anode A so that the wastewater passing portion 210 and the metal anode A And a second sealing part 230 which is disposed between the wastewater passing part 210 and the air cathode C so as to seal between the wastewater passing part 210 and the air cathode C And may include a second sealing portion 240.

The air supply unit 220 may be formed in a rectangular ring shape having a central part penetrated to have a predetermined internal space and may be formed of a plurality of And an air passage 222. The plurality of air passageways 222 may be formed to surround the internal space.

Oxygen contained in the air introduced into the internal space through the plurality of air passages 222 is used for the reduction reaction of the air cathode C.

4, the air supply unit 220 may be disposed on one surface of the metal anode A facing the waste water passage 210, but this is not essential. And an embodiment of the electrocoagulation device 20 to be described with reference to FIG. 5B.

The electrocoagulation unit 200 according to an embodiment of the present invention may be realized as a single unit by a support plate 250 and a fastener 260. The support plate 250 and the fastener 260 may be various Shape, structure, and the like.

Referring to FIGS. 5A and 5B, the electrocoagulation apparatus 20 according to the present invention can be realized by connecting a plurality of the electrocoagulation units 200 described with reference to FIG.

The electrocoagulation unit 200 may include a first electrocoagulation unit 200a, a second electrocoagulation unit 200b to an Nth (N is a natural number) electrocoagulation unit 200n, May be electrically connected by an air supply unit and an adjacent electrocoagulation unit.

A detailed description of the electrical connection will be made by way of example of the first electrocoagulation unit 200a and the second electrocoagulation unit 200b.

The metal anode A of the first electrocoagulation unit 200a may be in contact with the air supply unit 220b in contact with the air cathode C of the second electrocoagulation unit 200b, 220b may be formed of a conductor.

The metal anode A of the first electrocoagulation unit 200a can be electrically connected to each other via the air cathode C and the air supply unit 220b of the second electrocoagulation unit 200b, The plurality of electrocoagulation units 200a, 200b to 200n can be sequentially electrically connected to each other.

Here, the metal cathode C of the Nth electrocoagulation unit 200n is connected to the air cathode C of the first electrocoagulation unit 200a via a lead portion (not shown), and by the movement of electrons through the lead portion Electric power is produced.

A plurality of the electrocoagulation units 200 may be connected to each other by the support plate 25 and the fastener 26. The support plate 25 and the fastener 26 may be various Shape, structure, and the like.

FIG. 6 is a schematic perspective view for explaining a power generation type electrophotocopying apparatus capable of treating wastewater according to another embodiment of the present invention. FIG. 7 is a schematic view of a power generation type electrophoresis apparatus according to another embodiment of the present invention, Fig. 7 is a view for explaining the detachment principle of the metal anode provided in the electro-type coagulation apparatus. Fig.

FIG. 8 is a schematic internal configuration diagram for explaining a power generation type electrophoresis apparatus capable of treating wastewater according to another embodiment of the present invention.

6 to 8, a power generation type electrocoagulation apparatus 30 (hereinafter, referred to as 'an electrocoagulation apparatus') capable of treating wastewater according to the present invention includes a plurality of power generation type electrocoagulation units 300 , Hereinafter referred to as an " electrocoagulation unit ").

The electrocoagulation unit 300 may include a first electrocoagulation unit 300a and a second electrocoagulation unit 300b to an Nth (N is a natural number) electrocoagulation unit 300n, The first electrocoagulation unit 300a will be described as an example.

The first electrocoagulation unit 300a includes a metal anode A containing magnesium, an air cathode C containing a carbon cloth, and a wastewater passage 310 defining the size of the wastewater passage space S .

The metal anode A may be disposed in the wastewater passage space S such that the wastewater passage space S is divided into a first wastewater passage space S1 and a second wastewater passage space S2, The air cathode C may include a first air cathode C1 and a second air cathode C2 disposed on one side and the other side of the wastewater passing portion 310, respectively.

The first air cathode C1 and the second air cathode C2 may share one of the metal anodes A disposed in the wastewater passage space S and the metal anode A may be oxidized 7 and 8, the waste water passing portion 310 can be detachably coupled to the waste water passing portion 310 so as to be replaceable.

The manner of replacing the metal anode (A) may be a sliding type as shown in the drawing, but is not limited thereto.

A plurality of the electrocoagulation units 300 may be connected to each other by the support plate 35 and the fastening member 36. The metal anode A may be connected to the wastewater passing portion 310 So that it is possible to replace the specific metal anode (A) without the separation of the fastener (36).

On the other hand, the first electrocoagulation unit 300a is disposed on the opposite surface of one surface of the first air cathode C1 toward the first wastewater passage space S1, and the first air cathode C1 (322) for supplying the air toward the second wastewater passage space (S2) and a second air supply port (322) for supplying the air toward the second wastewater passage space (S2) And a second air supply unit 324 for supplying the air toward the second air cathode C2.

The first air supply unit 322 and the second air supply unit 324 may include a predetermined internal space and an air passage through which the internal space and the outside communicate with each other.

When a plurality of electrocoagulation units having the same configuration as the first electrocoagulation unit 300a are connected, one electrocoagulation unit 30 can be realized.

Here, the first electrocoagulation unit 300a, the second electrocoagulation unit 300b, and the Nth (N is a natural number) electrocoagulation unit 300n may be electrically connected to each other by the leads 372 and 374.

Specifically, the first air cathode C1 and the second air cathode C2 of the first electrocoagulation unit 300a are electrically connected to each other by a first conductive line 372, and the first conductive line 372 Can be electrically connected to the metal anode (A) of the second electrocoagulation unit (300b).

The air cathodes C1 and C2 of the Nth electrocoagulation unit 300n can be electrically connected to the first electrocoagulation unit 300a through the lead portion 32. In this way, Is connected to the metal anode (A) of the unit (300a), and electric power is produced by the movement of electrons through the lead portion (32).

FIGS. 9A and 9B are diagrams showing XRD analysis data and voltage distribution curves for currents generated when artificial wastewater is treated by a power generation type electrophoresis apparatus capable of treating wastewater according to the present invention .

Experiments were conducted using 12 stacked cells in order to investigate the wastewater treatment, resource production and electric power production possibility by the electric production type electric coagulation apparatus capable of wastewater treatment according to the present invention.

For the experiment, artificial wastewater containing an initial pH of 7, 0.02 M NaCl, 1000 ppm ammonia nitrogen, and 500 ppm phosphorus was injected at a rate of 900 mL / min. The effluent was collected and analyzed using ICP Concentration and pH of effluent were monitored.

Further, the precipitate was separated / dried from the effluent through centrifugation, and X-ray diffraction analysis was used to confirm whether or not struvite was formed.

In addition, the power that can be generated under these conditions was also investigated. 9A and 9B show voltage distribution curves for XRD analysis data and current, respectively.

As a result, the initial phosphorus concentration of 500 ppm was reduced to less than 1 ppm within 4 hours, the pH of the effluent was 8.9 and the maximum power was 2 W.

In addition, since the wastewater infusion rate was 900 mL / min, it is considered that the wastewater of 1.3 ton per day can be treated.

On the other hand, referring to FIG. 9A, it can be seen that the XRD peak of the recovered oxide forms a peak at the same position as the main peak (pink dot) inherent to struvite.

Therefore, the power generation type electrophoresis apparatus capable of treating the wastewater according to the present invention has successfully provided the magnesium ion from the metal anode and the pH of the wastewater has risen to 8.9, which is the pH for determination of struvite, It can be seen that it has been recovered.

In summary, the power generation type electrocoagulation unit capable of treating wastewater according to the present invention and the power generation type electrocoagulation apparatus capable of treating wastewater according to the present invention are capable of treating wastewater with stable operation efficiency, It is possible to produce electricity to such an extent that it can be operated autonomously without the use of the waste water, and furthermore, the recovery of struvite, which is a useful resource material, from the wastewater can be made possible.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be apparent to those skilled in the art that changes or modifications may fall within the scope of the appended claims.

100, 200: Power generation electro-coagulation unit capable of wastewater treatment
20, 30: Electricity production type electric coagulation apparatus capable of wastewater treatment
A: Metal anode
C: Air cathode

Claims (12)

Wastewater - the wastewater comprises a metal anode and an air cathode, which are spaced apart from each other to provide a wastewater passage space through which ammonia nitrogen, phosphate and electrolyte are passed, ); And
And a wire portion physically connecting the metal anode and the air cathode outside the wastewater passage space and having a predetermined resistance,
The metal anode and the air cathode may be formed of a metal,
Each containing magnesium and carbon cloth,
The metal anode containing magnesium may be, for example,
Magnesium ions and the water of the wastewater to produce first electrons for the generation of the first hydroxide ions,
The air cathode, comprising the carbon cloth,
The second electrons generated by the oxidation of the magnesium moved through the lead portion react with water in the wastewater and oxygen in the air to generate second hydroxide ions,
Wherein the first hydroxide ion and the second hydroxide ion,
(MgHN ₄ PO ₄ 6 H ₂ O) due to the reaction of magnesium ions, ammonia nitrogen and phosphate contained in the wastewater is crystallized so that the wastewater can be treated. In order to crystallize the struvite, contributes to satisfy the pH condition,
The second electron may be,
And the electric power is produced in the process of being moved through the lead portion.
The method according to claim 1,
Wherein the first hydroxide ion and the second hydroxide ion,
Characterized in that the pH of the wastewater flowing into the wastewater passage space is increased so that the addition of an alkaline agent for satisfying the pH condition for crystallization of the struvite is not required, Electrocoagulation unit.
The method according to claim 1,
The movement of the second electrons through the lead portion for power production,
Wherein said electrolytic cell is embodied by said electrolyte contained in said wastewater.
The method according to claim 1,
A wastewater passage portion defining the size of the wastewater passage space and having the metal anode and the air cathode disposed on one side and the other side, respectively; And
And an air supply unit disposed on an opposite surface of one side of the air cathode facing the wastewater passage to supply the air toward the air cathode from the outside,
The waste water passing-
An inlet port through which the waste water flows and an outlet through which the waste water flows out,
The inlet
Wherein the electric power generation type electric flocculation unit is disposed at a lower side relative to the outlet.
5. The method of claim 4,
The waste water passing-
Wherein the distance between the metal anode and the air cathode is defined by a distance between the metal anode and the air cathode.
5. The method of claim 4,
A first sealing portion disposed between the wastewater passing portion and the metal anode, for sealing between the wastewater passing portion and the metal anode; And
And a second sealing portion disposed between the wastewater passing portion and the air cathode to seal between the wastewater passing portion and the air cathode.
5. The method of claim 4,
The air-
And a plurality of air passages having a predetermined internal space and communicated with the outside so that the air is supplied from the outside to the inside space,
Wherein the plurality of air passages
Wherein the inner space is formed so as to surround the inner space.
A power generation type electrocoagulation unit capable of treating wastewater according to any one of claims 4 to 7,
The electric power generation type electrocoagulation unit capable of treating the wastewater,
A first electric agglomerating unit of power generation type capable of wastewater treatment and a second electric agglomerating unit of power generation type capable of wastewater treatment,
The metal anode of the first electric agglomerating unit of the power generation type capable of treating the wastewater,
And a second electro-coagulation unit that is connected to the air supply unit of the power generation-
The air supply unit of the second electric agglomerating unit of the power generation type capable of treating the wastewater,
Characterized in that the metal anode of the power generation type first electrocoagulation unit capable of treating the wastewater and the air cathode of the power generation type second electrocoagulation unit capable of treating the wastewater treatment are electrically connected to each other. Capable of producing electricity.
The method according to claim 1,
And a wastewater passage portion that defines a size of the wastewater passage space,
The metal anode,
Wherein the wastewater passage space is disposed in the wastewater passage space such that the wastewater passage space is divided into a first wastewater passage space and a second wastewater passage space,
The air cathode includes:
And a first air cathode and a second air cathode arranged on one side and the other side of the wastewater passage, respectively,
Wherein the first air cathode and the second air cathode are arranged such that,
And the one of the metal anodes disposed in the wastewater passage space is shared by the wastewater treatment space.
10. The method of claim 9,
The metal anode,
Wherein said waste water treatment unit is detachably coupled to said waste water passing portion so as to be replaceable by oxidation.
10. The method of claim 9,
A first air supply unit disposed on an opposite surface of one surface of the first air cathode facing the first waste water passage space to supply the air from the outside toward the first air cathode; And
And a second air supply unit disposed on an opposite surface of one surface of the second air cathode facing the second waste water passage space for supplying the air from the outside toward the second air cathode, Capable electric production type electrocoagulation unit.
11. A power generation type electrocoagulation unit capable of treating wastewater according to any one of claims 9 to 11,
The electric power generation type electrocoagulation unit capable of treating the wastewater,
A first electric agglomerating unit of power generation type capable of wastewater treatment and a second electric agglomerating unit of power generation type capable of wastewater treatment,
The first air cathode and the second air cathode of the power generation type first electrocoagulation unit capable of treating the wastewater are electrically connected to each other by a first conductor,
The first conductor may be formed,
Characterized in that the electric power generation type electric coagulation apparatus is electrically connected to the metal anode of the second electric coagulation unit of the power generation type capable of treating the wastewater.

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