Organic wastewater treatment device with biodegradation and electrocatalytic degradation synergy

Abstract

The present application relates to sewage treatment technical field, especially to a kind of organic sewage device of biodegradation and electrocatalytic degradation synergic treatment, including box, reactor is equipped in box, reactor is including two electrode sheets, two electrode sheets are formed with sealed cavity between, cavity is filled with sponge filling material, one electrode sheet outside interval is provided with aluminum plate, aluminum plate is connected power supply anode, electrode sheet close to aluminum plate is connected power supply cathode, electrode sheet away from aluminum plate is connected power supply anode;The present application uses microalgae to absorb inorganic salt in sewage, and carbon dioxide generated by electrode catalytic oxidation can be directly absorbed by microalgae in sealed cavity to promote microalgae growth, oxygen released by microalgae growth can be used by electrolytic catalysis process, can greatly improve the efficiency of electrolytic catalysis, oxygen and carbon dioxide generated in process can promote each other, produce synergistic effect, and oxygen and carbon dioxide can be completely utilized in closed system.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewage treatment technical field, especially to a kind of organic sewage device of biodegradation and electrocatalytic degradation synergy processing. BACKGROUND

[0002] Electrochemical oxidation method refers to under the action of electric field, modifier existing in electrode surface or solution phase can promote or inhibit electron transfer reaction occurring on electrode, make toxic and harmful pollutants become non-toxic and harmless substances, or form precipitate and gas escape, so as to achieve the purpose of removing pollutants, while the modifier in electrode surface or solution phase does not change.Chemical action.In the sewage treated by electrolysis, some electrolyte must exist, direct discharge can affect water quality, and microalgae can absorb these electrolytes for growth.

[0003] The main factors affecting the growth of microalgae include light, temperature, nutrient salt, pH, carbon source, organic nutrient substance and biological factor.Carbon dioxide is the main carbon source supply form and organic nutrient substance in microalgae culture, and some microalgae grow more suitable after obtaining organic matter, and electrochemical oxidation reaction can produce carbon dioxide required by microalgae, so electrochemical oxidation can be combined with microalgae to treat organic sewage synergistically. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the problem that in the prior art, some electrolyte must exist in the sewage treated by electrolysis, and direct discharge can affect water quality, and to provide a kind of organic sewage device of biodegradation and electrocatalytic degradation synergy processing.

[0005] To solve the above technical problems, the present application adopts the following technical scheme: a kind of organic sewage device of biodegradation and electrocatalytic degradation synergy processing, including box, the reactor is arranged in the box, the reactor is used to process the organic sewage that microalgae of carbon dioxide absorption and oxygen release are added;

[0006] The reactor is a cuboid structure, including two oppositely arranged electrode sheets, the remaining four sides are closed with insulating material to form a sealed cavity between the two electrode sheets, the cavity is filled with sponge filler for microalgae growth, and the two electrode sheets are respectively provided with water inlet and water outlet communicated with the cavity, and the outside of one of the electrode sheets is provided with an aluminum plate with the same size as the electrode sheet, the gap between the two is 3-4cm, and the two are connected by direct current power source, the voltage is 5-10V, the aluminum plate is connected to the positive electrode of the power source, the electrode sheet close to the aluminum plate is connected to the negative electrode of the power source, the electrode sheet away from the aluminum plate is connected to the positive electrode of the power source, the distance between the two electrode sheets is 10-20cm, and the potential difference is 20-30V.

[0007] In operation, direct current power is connected between the electrodes, and some microalgae are put into the sewage, the sewage flows into the cavity from the water inlet, as the microalgae grow in the reactor, the oxygen generated by the microalgae can promote the catalytic degradation on the surface of the electrode, the carbon dioxide generated by the catalytic degradation can promote the growth of the microalgae, and the micro-voltage between the electrodes can also promote the growth of the microalgae, so that the effect of synergistic effect is achieved, the organic matter in the water is degraded, and the inorganic salt in the water is absorbed by the microalgae; when the excessive algae are generated, part of the algae will be separated from the sponge filler and enter the box, and the aluminum ions generated by the aluminum plate electrolytic corrosion can flocculate the microalgae and settle at the bottom of the box.

[0008] The above technical scheme uses microalgae to absorb inorganic salt in sewage, and carbon dioxide generated by electrode catalytic oxidation can be directly absorbed by microalgae in the sealed cavity to promote the growth of microalgae, and the oxygen released by the growth of microalgae can be used by the electrolytic catalytic process, which can greatly improve the efficiency of electrolytic catalysis, and the oxygen and carbon dioxide generated in the process can be used mutually to produce synergistic effect, and the oxygen and carbon dioxide can be completely used in the closed system.

[0009] Further, the opposite two side walls of the box are respectively provided with a dredging opening and a drainage opening, and the reactor is inclined from top to bottom to the dredging opening; when the microalgae enter the box from the water outlet pipe, the aluminum ions generated by the aluminum plate electrolytic corrosion flocculate the microalgae, the formed flocs settle along the inclined aluminum plate to the bottom of the box, and are finally removed through the dredging opening.

[0010] Further, the middle part of the cavity is provided with a lamp plate, the lamp plate power is turned on, the lamp plate emits light on both sides to illuminate the sponge filler on both sides, which can promote the photosynthesis of the microalgae on the sponge filler, and the lamp plate is provided with a screen hole for the sewage to pass through, and the cavity is divided into two small cavities in communication by the lamp plate.

[0011] Further, the screen hole is located in the lower half of the lamp plate, and the screen hole density gradually increases from top to bottom; the water inlet and the water outlet on the electrode sheet are located at the upper end of the electrode sheet, the sewage flows into one of the small cavities from the upper end water inlet, and flows into the other small cavity through the screen hole located at the lower end, and finally flows out through the upper end water outlet, which increases the residence time of the sewage in the reactor, so that the sewage degradation is more sufficient.

[0012] Further, the reactor has several, and a water outlet of a former reactor of the adjacent two reactors is connected with a water inlet of a latter reactor through a hose, the water inlet of the first reactor is connected with a water inlet pipe, and the water outlet of the last reactor is connected with a water outlet pipe, and the water outlet pipe extends to the bottom of the box body and is bent to the direction of the dredging opening at the end far from the water outlet of the reactor, so that the microalgae flowing out of the water outlet pipe can fully contact with the aluminum ions generated by the electrolytic corrosion of the aluminum plate; the sewage flows through the reactors in sequence, and the organic matters in the water are gradually degraded, and the inorganic salts in the water are gradually absorbed by the microalgae.

[0013] Further, a waterproof plate is vertically arranged between the drainage opening and the water outlet pipe, the bottom of the waterproof plate is fixed on the bottom of the box body, and a gap for water flow is left between the top of the waterproof plate and the top of the box body, and the waterproof plate plays a role of overflow.

[0014] The microalgae are used to absorb the inorganic salts in the sewage, and the carbon dioxide generated by the electrode catalytic oxidation can be directly absorbed by the microalgae in the closed cavity to promote the growth of the microalgae, the oxygen released by the growth of the microalgae can be used by the electrolytic catalysis process, the efficiency of the electrolytic catalysis can be greatly improved, the oxygen and the carbon dioxide generated in the process can be used mutually to promote each other and produce a synergistic effect, and the oxygen and the carbon dioxide can be completely used in the closed system. BRIEF DESCRIPTION OF DRAWINGS

[0015] The application will be further described below in combination with the drawings and examples.

[0016] Fig. 1 It is a structural schematic view of the application;

[0017] Fig. 2 It is a structural schematic view of the reactor;

[0018] Fig. 3 It is a structural schematic view of the lamp plate;

[0019] In the drawings:

[0020] 1, box body; 101, dredging opening; 102, drainage opening;

[0021] 2, reactor; 201, electrode sheet; 202, sponge filler; 203, water inlet; 204, water outlet; 205, aluminum plate; 206, lamp plate; 2061, sieve hole;

[0022] 3, hose;

[0023] 4, water inlet pipe;

[0024] 5, water outlet pipe;

[0025] 6, waterproof plate. DETAILED DESCRIPTION

[0026] The invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner. Therefore, they only show the components relevant to the invention, and directions and references, such as up, down, left, right, etc., are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0027] Example 1:

[0028] like Figs. 1-3 As shown, the present invention is a device for the synergistic treatment of organic wastewater by biodegradation and electrocatalytic degradation, including a box 1, wherein two opposite side walls of the box 1 are respectively provided with a sludge removal port 101 and a drainage port 102;

[0029] The container 1 is equipped with several spaced reactors 2. The reactors 2 are used to treat organic wastewater containing microalgae that can absorb carbon dioxide and release oxygen. The wastewater flows through several reactors 2 in sequence, and the organic matter in the water is gradually degraded, while the inorganic salts in the water are gradually absorbed by the microalgae.

[0030] The reactor 2 has a cuboid structure, including two opposing electrode plates 201. The other four sides are sealed with insulating material, forming a sealed cavity between the two electrode plates 201. The cavity is filled with sponge packing material 202 for microalgae growth. The two electrode plates 201 are respectively provided with an inlet 203 and an outlet 204 communicating with the cavity. A flexible hose 3 connects the outlet 204 of the first reactor 2 to the inlet 203 of the second reactor 2. The inlet 203 of the first reactor 2 is connected to an inlet pipe 4, and the outlet 204 of the last reactor 2 is connected to an outlet pipe 5. A water baffle 6 is vertically installed between the drain outlet 102 and the outlet pipe 5. The bottom of the water baffle 6 is fixed to the bottom of the tank body 1, and a gap is left between the top of the water baffle 6 and the top of the tank body 1 for water flow. The carbon dioxide produced by electrode catalytic oxidation is absorbed by microalgae in the cavity to promote microalgae growth. The oxygen released by the microalgae growth is utilized by the electrolytic catalytic process, which greatly improves the efficiency of electrolytic catalysis. The oxygen and carbon dioxide produced in the process promote each other and produce a synergistic effect. Moreover, oxygen and carbon dioxide can be fully utilized in a closed system.

[0031] One of the electrode sheet 201 is spaced apart from the outside of the same size of aluminum plate 205, the gap between the two is 3-5cm and the two between the direct current power supply, voltage is 5-10V, the aluminum plate 205 is connected to the positive electrode of the power supply, the electrode sheet 201 close to the aluminum plate 205 is connected to the negative electrode of the power supply, the electrode sheet 201 away from the aluminum plate 205 is connected to the positive electrode of the power supply, the spacing between the two electrode sheets 201 is 10-20cm, and the potential difference is 20-30V. Each reactor 2 is inclined from top to bottom to the dredging opening 101, and the water outlet pipe 5 extends to the bottom of the box 1 away from the water outlet 204 of the reactor 2 and bends to the direction of the dredging opening 101. A plurality of through holes can also be formed in the bending section of the water outlet pipe 5, so that the microalgae flowing out of the water outlet pipe 204 can fully contact with the aluminum ions generated by electrolytic corrosion of each aluminum plate 205. When the microalgae enter the box 1 from the water outlet pipe 5, the aluminum ions generated by electrolytic corrosion of the aluminum plate 205 have flocculation effect on the microalgae, and the formed flocs are settled to the bottom of the box 1 along the inclined aluminum plate 205, and finally removed through the dredging opening 101. The inclined reactor 2 can make the oxygen produced by the microalgae fully contact with the electrode sheet 201, and improve the efficiency of electrolytic catalysis.

[0032] The middle part of the cavity is provided with a lamp plate 206, and the power supply of the lamp plate 206 is turned on. The lamp plate 206 emits light on both sides to illuminate the sponge filler 202 on both sides, which can promote the photosynthesis of microalgae on the sponge filler 202. The lamp plate 206 is provided with a screen hole 2061 for sewage to pass through, and the lamp plate 206 divides the cavity into two small cavities in communication with each other. The screen hole 2061 is located in the lower half of the lamp plate 206, and the density of the screen hole 2061 gradually increases from top to bottom. The water outlet 204 and the water inlet 203 on the electrode sheet 201 are located at the upper end of the electrode sheet 201. The sewage flows into one of the small cavities from the upper end of the water inlet 203, and enters the other small cavity through the screen hole 2061 located at the lower end. Finally, it flows out through the water outlet 204 at the upper end, increasing the residence time of the sewage in the reactor 2, so that the degradation of the sewage is more sufficient.

[0033] Working principle:

[0034] When operating, the direct current power supply between the electrodes is turned on, the power supply of the lamp plate 206 is turned on, the sponge filler 202 on both sides is illuminated, some microalgae are put into the sewage, the sewage flows into the cavity from the water inlet 203 of the first reactor 2 through the water inlet pipe 4. Due to the obstruction of the lamp plate 206, the water flows downward after flowing into the cavity from the upper side, flows into the other side through the screen hole 2061, and then flows out from the water outlet 204, enters the next reactor 2, and repeats the process until the organic matter in the water is degraded and the inorganic salt in the water is absorbed by the microalgae.

[0035] With the growth of the microalgae inside the reactor 2, the oxygen produced by the microalgae can promote the catalytic degradation on the surface of the electrode, the carbon dioxide produced by the catalytic degradation can promote the growth of the microalgae, and the micro-voltage between the electrodes can also promote the growth of the microalgae, achieving a synergistic effect. When the microalgae are produced in excess, a part of them will be separated from the sponge filler 202 and enter the box 1. The aluminum ions produced by the electrolytic corrosion of the aluminum plate 205 can flocculate the microalgae, which will settle at the bottom of the box 1 along the inclined aluminum plate 205, and finally be removed from the dredging port 101 on one side of the box 1. The treated water flows out from the drainage port 102 after overflowing through the waterproof plate 6.

[0036] The above-mentioned ideal embodiments according to the present application are for illustration, and through the above-mentioned description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A device for synergistic treatment of organic wastewater through biodegradation and electrocatalytic degradation, characterized in that: Includes a box (1), inside which is installed a reactor (2), which is used to treat organic wastewater containing microalgae that can absorb carbon dioxide and release oxygen; The reactor (2) includes two opposing electrode plates (201), with a sealed cavity formed between the two electrode plates (201). The cavity is filled with sponge packing material (202) for microalgae growth. The two electrode plates (201) are respectively provided with an inlet (203) and an outlet (204) communicating with the cavity. An aluminum plate (205) is provided on the outer side of one of the electrode plates (201). The aluminum plate (205) is connected to the positive terminal of the power supply. The electrode plate (201) closer to the aluminum plate (205) is connected to the negative terminal of the power supply, and the electrode plate (201) farther away from the aluminum plate (205) is connected to the positive terminal of the power supply.

2. The device for synergistic treatment of organic wastewater by biodegradation and electrocatalytic degradation according to claim 1, characterized in that: The two opposite side walls of the box (1) are respectively provided with a sludge removal port (101) and a drainage port (102), and the reactor (2) is inclined from top to bottom toward the sludge removal port (101).

3. The device for synergistic treatment of organic wastewater by biodegradation and electrocatalytic degradation according to claim 1, characterized in that: A lamp plate (206) is provided in the middle part of the cavity, and a sieve hole (2061) is provided on the lamp plate (206).

4. The device for synergistic treatment of organic wastewater by biodegradation and electrocatalytic degradation according to claim 3, characterized in that: The sieve holes (2061) are located in the lower half of the lamp plate (206), and the density of the sieve holes (2061) gradually increases from top to bottom.

5. The device for synergistic treatment of organic wastewater by biodegradation and electrocatalytic degradation according to claim 2, characterized in that: There are several reactors (2). A hose (3) is connected between the outlet (204) of the first reactor (2) and the inlet (203) of the second reactor (2). The inlet (203) of the first reactor (2) is connected to an inlet pipe (4), and the outlet (204) of the last reactor (2) is connected to an outlet pipe (5).

6. The device for synergistic treatment of organic wastewater by biodegradation and electrocatalytic degradation according to claim 5, characterized in that: A baffle plate (6) is provided between the drain outlet (102) and the water outlet pipe (5).

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