Self-sustaining electro-Fenton coupled biological membrane sewage treatment system

Abstract

The utility model discloses a self-sustaining electro-Fenton coupling biological membrane sewage treatment system which comprises a cooperative treatment tank, an aeration device is laid at the bottom of a tank body of the cooperative treatment tank, a filler module is arranged in the cooperative treatment tank, and the filler module is arranged above the aeration device. And an anode component and a cathode component are respectively arranged on two sides of the filler module in the coprocessing tank body. Novel pollutants in a water body are efficiently treated by adopting an electro-Fenton coupling biological membrane technology, oxygen is converted into H2O2 in a catalytic electrode under the action of electric energy, the H2O2 generates electrons under the catalytic action of the electrode, and the electrons can be used for mineralizing and degrading organic pollutants which are difficult to degrade, so that deep removal is realized.

Description

Technical Field

[0001] The utility model relates to a self-sustaining electric-Fenton coupled biofilm sewage treatment system, belonging to the technical field of sewage treatment. Background Art

[0002] At present, emerging pollutants have received extensive international attention. Emerging pollutants (CECs) refer to chemical substances that are environmentally persistent, bioaccumulative and biotoxic. The types of emerging pollutants mainly include: environmental endocrine disruptors (EDCs), pharmaceuticals and personal care products (PPCPs), antibiotic resistance genes (ARGs), etc., which have been detected in water supply, sewage, sludge anaerobic digestion systems, estuaries and coastal areas. The environmental and health risks of these substances are relatively hidden, and even if they enter the environment at low doses, they will bring risks to environmental safety.

[0003] With the development of science and technology, new pollutants are gradually being detected in the water environment. Since traditional water treatment methods cannot effectively remove new pollutants, we propose a self-sustaining electro-Fenton coupled biofilm wastewater treatment system to efficiently treat new pollutants in water bodies and improve the degradation efficiency of organic matter and the safety of effluent. Utility Model Content

[0004] The purpose of the utility model is to provide a self-sustaining electro-Fenton coupled biofilm sewage treatment system, which adopts electro-Fenton coupled biofilm technology to efficiently treat new pollutants in water bodies, while achieving the effect of nitrogen and phosphorus removal, improving the efficiency of organic matter degradation, and ensuring the safety of effluent.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a self-sustaining electro-Fenton coupled biofilm wastewater treatment system, comprising a collaborative treatment tank, an aeration device is laid on the bottom of the collaborative treatment tank, a filler module is arranged in the collaborative treatment tank body, and the filler module is placed above the aeration device, the aeration device is connected to an air compressor for aeration, an anode component and a cathode component are respectively arranged on both sides of the filler module in the collaborative treatment tank body, the anode component and the cathode component are arranged in parallel on both sides of the filler module in the shape of a flat plate, and the anode component and the cathode component are electrically connected to a power supply system.

[0006] The aforementioned self-sustaining electric-Fenton coupled biofilm wastewater treatment system, the power supply system includes a photovoltaic device, a battery, an inverter, and an automatic controller. The photovoltaic device is electrically connected to the battery through an inverter. The photovoltaic device generates electricity through solar energy, which is converted into direct current by the inverter and stored in the battery. The battery is electrically connected to the anode component and the cathode component through the automatic controller. The positive electrode of the battery is connected to the anode component accordingly, and the negative electrode of the battery is connected to the cathode component accordingly.

[0007] The aforementioned self-sustaining electric-Fenton coupled biofilm wastewater treatment system, the power supply system also includes a DC power supply, the DC power supply is electrically connected to the anode component and the cathode component through an automatic controller, the positive pole of the DC power supply is correspondingly connected to the anode component, the negative pole of the DC power supply is correspondingly connected to the cathode component, and the DC power supply is a backup power supply to prevent the battery from running low.

[0008] The aforementioned self-sustaining electro-Fenton coupled biofilm wastewater treatment system also includes a regulating tank, which is arranged at the front end of the coordinated treatment tank to adjust the water quality to meet the required suitable pH conditions in the pH range of 2-5.

[0009] The aforementioned self-sustaining electro-Fenton coupled biofilm wastewater treatment system is provided with a pH detection device, an automatic dosing device and a stirring device in the regulating tank. The pH value of the wastewater is detected by the pH detection device, and according to the monitoring data, the automatic dosing device pumps acid and alkali solutions under the stirring of the stirring device to adjust the pH.

[0010] The aforementioned self-sustaining electro-Fenton coupled biofilm wastewater treatment system also includes an inlet buffer tank, which is arranged at the front end of the regulating tank. The organic wastewater generated within a certain period of time is discharged into the inlet buffer tank for full mixing to reduce the impact of water quality and quantity shocks on the reaction system.

[0011] In the aforementioned self-sustaining electro-Fenton coupled biofilm wastewater treatment system, the cathode component is a Cu-C3N4 electrode, and the anode component is a graphene electrode.

[0012] In the aforementioned self-sustaining electro-Fenton coupled biofilm wastewater treatment system, the filler module uses iron-carbon electrolytic filler.

[0013] Compared with the prior art, the utility model discharges the organic wastewater generated within a certain period of time into the water inlet buffer tank for full mixing, so as to reduce the impact of water quality and water quantity shock on the reaction system, and the regulating tank adjusts the water quality to meet the required appropriate pH conditions; the utility model adopts electro-Fenton coupled biofilm technology to efficiently treat new pollutants in the water body, and oxygen is converted into H2O2 in the catalytic electrode under the action of electric energy, and H2O2 generates electrons under the catalytic action of the electrode, and the electrons can mineralize and degrade the difficult-to-degrade organic pollutants to achieve deep removal; the utility model solves the problems of high energy consumption, large dosage of reagents, and difficulty in simultaneous deep removal of total nitrogen and difficult-to-degrade organic matter in traditional sewage treatment processes, and can effectively achieve the effect of nitrogen removal and phosphorus removal, and improve the degradation efficiency of organic matter and the safety of effluent. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a system schematic diagram of the utility model.

[0015] Figure numerals: 1-cooperative treatment tank, 2-aeration device, 3-filling module, 4-anode component, 5-cathode component, 6-power supply system, 7-photovoltaic device, 8-battery, 9-inverter, 10-automatic controller, 11-DC power supply, 12-regulating tank, 13-pH detection equipment, 14-automatic dosing equipment, 15-stirring device, 16-water inlet buffer tank.

[0016] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. DETAILED DESCRIPTION

[0017] Embodiment 1 of the utility model: A self-sustaining electro-Fenton coupled biofilm wastewater treatment system, comprising a collaborative treatment tank 1, wherein an aeration device 2 is laid at the bottom of the collaborative treatment tank 1, a filler module 3 is arranged in the body of the collaborative treatment tank 1, and the filler module 3 is placed above the aeration device 2, and an anode component 4 and a cathode component 5 are respectively arranged on both sides of the filler module 3 in the body of the collaborative treatment tank 1, and the anode component 4 and the cathode component 5 are electrically connected to a power supply system 6.

[0018] The aeration device 2 located below the packing module 3 in the coordinated treatment pool 1 performs aeration. The aeration rate is adjusted according to the concentration of the pollutants. Under the action of electrical energy, O2 converts the water in the catalytic electrode into H2O2. H2O2 produces ·OH under the catalytic action of the electrode. ·OH can mineralize and degrade the difficult-to-degrade organic pollutants to achieve deep removal. The reaction is as follows:

[0019] O2+2H2O+2e - →H2O2+2OH -

[0020] Fe 2+ +H2O→Fe 3+ + OH+OH -

[0021] Fe 3+ +e - →Fe 2+

[0022] New pollutants + ·OH → oxidation intermediates

[0023] Oxidation intermediate + OH → CO2 + H2O + inorganic ions

[0024] Embodiment 2 of the present utility model: A self-sustaining electro-Fenton coupled biofilm wastewater treatment system, comprising a collaborative treatment tank 1, wherein an aeration device 2 is laid at the bottom of the collaborative treatment tank 1, a filler module 3 is arranged in the body of the collaborative treatment tank 1, and the filler module 3 is placed above the aeration device 2, and an anode component 4 and a cathode component 5 are respectively arranged on both sides of the filler module 3 in the body of the collaborative treatment tank 1, and the anode component 4 and the cathode component 5 are electrically connected to a power supply system 6.

[0025] The aeration device 2 located below the packing module 3 in the collaborative treatment pool 1 performs aeration, and the aeration rate is adjusted according to the concentration of the pollutants. Under the action of electric energy, O2 converts the water in the catalytic electrode into H2O2, and H2O2 produces ·OH under the catalytic action of the electrode. ·OH can mineralize and degrade the difficult-to-degrade organic pollutants to achieve deep removal.

[0026] The power supply system 6 includes a photovoltaic device 7, a battery 8, an inverter 9, and an automatic controller 10. The photovoltaic device 7 is electrically connected to the battery 8 through the inverter 9, and the battery 8 is electrically connected to the anode component 4 and the cathode component 5 through the automatic controller 10. The positive pole of the battery 8 is correspondingly connected to the anode component 4, and the negative pole of the battery 8 is correspondingly connected to the cathode component 5; the power supply system 6 also includes a DC power supply 11. The DC power supply 11 is electrically connected to the anode component 4 and the cathode component 5 through the automatic controller 10. The positive pole of the DC power supply 11 is correspondingly connected to the anode component 4, and the negative pole of the DC power supply 11 is correspondingly connected to the cathode component 5.

[0027] The power supply system 6 supplies power to the anode component 4 and the cathode component 5, and the automatic controller 10 realizes automatic control operation. A solar power supply system is constructed by the photovoltaic device 7, the battery 8, the inverter 9, and the automatic controller 10. The system is energy-saving and environmentally friendly. The physical and chemical properties of the difficult-to-degrade organic matter are considered, and the reaction system is systematically analyzed and energy balanced. In combination with the local latitude, light, climate and the conversion efficiency of photovoltaic power generation, the device is debugged and optimized to eliminate low-concentration and high-toxicity in water safely, efficiently and economically.

[0028] Embodiment 3 of the present utility model: A self-sustaining electro-Fenton coupled biofilm wastewater treatment system, comprising a collaborative treatment tank 1, wherein an aeration device 2 is laid at the bottom of the collaborative treatment tank 1, a filler module 3 is arranged in the body of the collaborative treatment tank 1, and the filler module 3 is placed above the aeration device 2, and an anode component 4 and a cathode component 5 are respectively arranged on both sides of the filler module 3 in the body of the collaborative treatment tank 1, and the anode component 4 and the cathode component 5 are electrically connected to a power supply system 6, the cathode component 5 is a Cu-C3N4 electrode, and the anode component 4 is a graphene electrode.

[0029] The aeration device 2 located below the packing module 3 in the collaborative treatment pool 1 performs aeration, and the aeration rate is adjusted according to the concentration of the pollutants. Under the action of electric energy, O2 converts the water in the catalytic electrode into H2O2, and H2O2 produces ·OH under the catalytic action of the electrode. ·OH can mineralize and degrade the difficult-to-degrade organic pollutants to achieve deep removal.

[0030] It also includes a regulating tank 12, which is arranged at the front end of the collaborative treatment tank 1. The regulating tank 12 is provided with a pH detection device 13, an automatic dosing device 14 and a stirring device 15. The regulating tank 12 adjusts the water quality to meet the required appropriate pH conditions. The pH range is 2-5. The pH value of the sewage is detected by the pH detection device. According to the monitoring data, the automatic dosing device pumps acid and alkali solutions under the stirring of the stirring device to adjust the pH; it also includes an inlet buffer tank 16, which is arranged at the front end of the regulating tank 12. The organic wastewater generated within a certain period of time is discharged into the inlet buffer tank 16 for full mixing to reduce the impact of water quality and water quantity shocks on the reaction system.

[0031] Embodiment 4 of the present utility model: A self-sustaining electro-Fenton coupled biofilm wastewater treatment system, comprising a collaborative treatment tank 1, wherein an aeration device 2 is laid at the bottom of the collaborative treatment tank 1, a filler module 3 is arranged in the body of the collaborative treatment tank 1, the filler module 3 adopts iron-carbon electrolytic filler, and the filler module 3 is placed above the aeration device 2, an anode component 4 and a cathode component 5 are respectively arranged in the body of the collaborative treatment tank 1 on both sides of the filler module 3, and the anode component 4 and the cathode component 5 are electrically connected to a power supply system 6.

[0032] The aeration device 2 located below the packing module 3 in the collaborative treatment pool 1 performs aeration, and the aeration rate is adjusted according to the concentration of the pollutants. Under the action of electric energy, O2 converts the water in the catalytic electrode into H2O2, and H2O2 produces ·OH under the catalytic action of the electrode. ·OH can mineralize and degrade the difficult-to-degrade organic pollutants to achieve deep removal.

[0033] The power supply system 6 includes a photovoltaic device 7, a battery 8, an inverter 9, and an automatic controller 10. The photovoltaic device 7 is electrically connected to the battery 8 through the inverter 9, and the battery 8 is electrically connected to the anode component 4 and the cathode component 5 through the automatic controller 10. The positive pole of the battery 8 is correspondingly connected to the anode component 4, and the negative pole of the battery 8 is correspondingly connected to the cathode component 5; the power supply system 6 also includes a DC power supply 11. The DC power supply 11 is electrically connected to the anode component 4 and the cathode component 5 through the automatic controller 10. The positive pole of the DC power supply 11 is correspondingly connected to the anode component 4, and the negative pole of the DC power supply 11 is correspondingly connected to the cathode component 5.

[0034] The power supply system 6 supplies power to the anode component 4 and the cathode component 5, and the automatic controller 10 realizes automatic control operation. A solar power supply system is constructed by the photovoltaic device 7, the battery 8, the inverter 9, and the automatic controller 10. The system is energy-saving and environmentally friendly. The physical and chemical properties of the difficult-to-degrade organic matter are considered, and the reaction system is systematically analyzed and energy balanced. In combination with the local latitude, light, climate and the conversion efficiency of photovoltaic power generation, the device is debugged and optimized to eliminate low-concentration and high-toxicity in water safely, efficiently and economically.

[0035] It also includes a regulating tank 12, which is arranged at the front end of the collaborative treatment tank 1. The regulating tank 12 is provided with a pH detection device 13, an automatic dosing device 14 and a stirring device 15. The regulating tank 12 adjusts the water quality to meet the required appropriate pH conditions. The pH range is 2-5. The pH value of the sewage is detected by the pH detection device. According to the monitoring data, the automatic dosing device pumps acid and alkali solutions under the stirring of the stirring device to adjust the pH; it also includes an inlet buffer tank 16, which is arranged at the front end of the regulating tank 12. The organic wastewater generated within a certain period of time is discharged into the inlet buffer tank 16 for full mixing to reduce the impact of water quality and water quantity shocks on the reaction system.

[0036] The working principle of an embodiment of the utility model is as follows: when the utility model is in use, the organic wastewater generated within a certain period of time is discharged into the water inlet buffer tank 16 for full mixing to reduce the impact of water quality and water quantity shock on the reaction system, the wastewater of the water inlet buffer tank 16 enters the regulating tank 12, and the pH is adjusted to meet the suitable pH conditions required for the electro-Fenton reaction in the pH range of 2-5, the adjusted sewage enters the coordinated treatment tank 1, and the anode component 4 and the cathode component 5 are powered by photovoltaic power generation technology. An iron-carbon electrolytic filler module 3 is provided in the coordinated treatment tank 1, and aeration is performed through the aeration device 2, and the aeration rate is adjusted according to the concentration of the pollutants; O2 is converted into H2O2 in the water in the catalytic electrode under the action of electric energy, and H2O2 produces ·OH under the catalytic action of the electrode, and ·OH can mineralize and degrade the difficult-to-degrade organic pollutants to achieve deep removal.

Claims

1. A self-sustaining electro-Fenton coupled biofilm wastewater treatment system, characterized in that: The invention comprises a coordinated treatment pool (1), wherein an aeration device (2) is laid at the bottom of the pool body of the coordinated treatment pool (1), a filler module (3) is arranged in the pool body of the coordinated treatment pool (1), and the filler module (3) is placed above the aeration device (2), and an anode component (4) and a cathode component (5) are respectively arranged on both sides of the filler module (3) in the pool body of the coordinated treatment pool (1), and the anode component (4) and the cathode component (5) are electrically connected to a power supply system (6).

2. A self-sustaining electro-Fenton coupled biofilm wastewater treatment system according to claim 1, characterized in that: The power supply system (6) comprises a photovoltaic device (7), a storage battery (8), an inverter (9), and an automatic controller (10); the photovoltaic device (7) is electrically connected to the storage battery (8) via the inverter (9); the storage battery (8) is electrically connected to the anode component (4) and the cathode component (5) via the automatic controller (10); the positive electrode of the storage battery (8) is correspondingly connected to the anode component (4); and the negative electrode of the storage battery (8) is correspondingly connected to the cathode component (5).

3. A self-sustaining electro-Fenton coupled biofilm wastewater treatment system according to claim 2, characterized in that: The power supply system (6) further comprises a direct current power supply (11), wherein the direct current power supply (11) is electrically connected to the anode component (4) and the cathode component (5) via an automatic controller (10), wherein the positive pole of the direct current power supply (11) is connected to the anode component (4) correspondingly, and the negative pole of the direct current power supply (11) is connected to the cathode component (5) correspondingly.

4. A self-sustaining electro-Fenton coupled biofilm wastewater treatment system according to claim 1, characterized in that: It also comprises a regulating pool (12), wherein the regulating pool (12) is arranged at the front end of the coordinated processing pool (1).

5. A self-sustaining electro-Fenton coupled biofilm wastewater treatment system according to claim 4, characterized in that: The regulating tank (12) is provided with a pH detection device (13), an automatic drug adding device (14) and a stirring device (15).

6. A self-sustaining electro-Fenton coupled biofilm wastewater treatment system according to claim 4 or 5, characterized in that: It also includes a water inlet buffer tank (16), which is arranged at the front end of the regulating tank (12).

7. A self-sustaining electro-Fenton coupled biofilm wastewater treatment system according to claim 1, characterized in that: The cathode component (5) is a Cu-C3N4 electrode, and the anode component (4) is a graphene electrode.

8. A self-sustaining electro-Fenton coupled biofilm wastewater treatment system according to claim 1, characterized in that: The filler module (3) uses iron-carbon electrolytic filler.

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