CN112010420A - Electrochemical biological accelerated treatment reaction device for azo dye wastewater - Google Patents
Electrochemical biological accelerated treatment reaction device for azo dye wastewater Download PDFInfo
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- CN112010420A CN112010420A CN202010799667.8A CN202010799667A CN112010420A CN 112010420 A CN112010420 A CN 112010420A CN 202010799667 A CN202010799667 A CN 202010799667A CN 112010420 A CN112010420 A CN 112010420A
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- reaction zone
- anaerobic
- aerobic
- biological
- azo dye
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/005—Combined electrochemical biological processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
Abstract
The invention discloses an electrochemical biological accelerated treatment reaction device for azo dye wastewater, which comprises a reactor body, wherein the reactor body comprises an anaerobic biological reaction zone and an aerobic biological reaction zone, and the two reaction zones are connected through a partition plate orifice. The anaerobic biological area is provided with a unit cathode, the aerobic biological area is provided with a unit anode, and the external power supply device is respectively connected with the cathode and the anode by leads. According to the invention, the biological cathode and the biological anode are respectively arranged in the traditional anaerobic-aerobic bioreactor, so that the anaerobic biological reduction and aerobic biological degradation processes of the azo dye can be effectively accelerated, the reaction residence time is reduced, and the biotransformation efficiency of the azo dye is improved.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to an electrochemical biological accelerated treatment reaction device for azo dye wastewater.
Background
Azo dyes are widely applied to various social fields, but the azo dyes generate a large amount of wastewater in the production process, and the wastewater has the characteristics of unstable discharge, high organic matter content, high biological toxicity, high chromaticity and the like, and can not be properly treated to cause great pollution to environmental water bodies. The chromaticity is a sensory index, and unpleasant feeling can be brought to people when the pigment is discharged into a river body; toxicity has short-term and cumulative harm to organisms, so that the decolorization and toxicity reduction of azo dyes are the key points of the wastewater treatment. Azo dyes mainly contain organic matters of azo groups, and in the traditional chemical oxidation method, decoloration and detoxification are realized by destroying chromophoric groups of the dyes, but the chemical oxidation method consumes more medicaments, has high cost and is easy to generate secondary pollution. The biological method is one of the most common methods in wastewater treatment, and has the characteristics of low cost and strong adaptability. The anaerobic biological method mainly provides electrons for azo dyes to realize the breaking reduction of azo bonds, thereby achieving the aim of decoloring and detoxifying. However, the method has the defects of slow reaction rate, long hydraulic retention time and the like, so that the application of the method in the aspect of azo dye wastewater treatment is limited.
Disclosure of Invention
The invention aims at solving the technical problem of the prior azo wastewater treatment method, and provides a method for efficiently removing azo dye wastewater by using an electrically-enhanced anaerobic aerobic organism accelerated reaction device.
In order to achieve the purpose, the invention adopts the following technical scheme:
an electrochemical biological accelerated treatment reaction device for azo dye wastewater comprises an anaerobic-aerobic bioreactor body, wherein the anaerobic-aerobic bioreactor body is divided into an anaerobic reaction zone, an anoxic reaction zone and an aerobic reaction zone by a plurality of partition plates, each partition plate is provided with a channel, water flow is in an S-shaped flow path in the anaerobic reaction zone, the anoxic reaction zone and the aerobic reaction zone, a water inlet zone is arranged at one end position far away from the channels of the anaerobic reaction zone, and a water outlet zone is arranged at one end position far away from the channels of the aerobic reaction zone;
a unit cathode and a water flow propeller are arranged in the anaerobic reaction area, and the water flow propeller in the anaerobic reaction area propels water flow to the anoxic reaction area;
a water flow propeller is arranged in the anoxic reaction zone, and water flow is propelled to the aerobic reaction zone by the water flow propeller in the anoxic reaction zone;
the aerobic reaction zone is internally provided with a unit anode and a water flow propeller, and the water flow propeller in the anaerobic reaction zone propels water flow to a water outlet zone.
As a further preferable scheme, an aeration device is arranged at the bottom of the aerobic reaction zone.
As a further preferable scheme, the unit cathode and the unit anode are both connected with an external power supply outside the anaerobic and aerobic bioreactor body through a circuit, and the circuit is provided with an external resistor.
As a further preferable scheme, the unit cathode is formed by spirally winding a plurality of carbon fiber wire brushes, the carbon fiber wire brushes are divided into stainless steel wires and carbon fibers, and the carbon fiber wire brushes are formed by twisting the carbon fibers around the stainless steel wires.
As a further preferable scheme, the diameter of the stainless steel wire is 0.25-0.5mm, the length of the carbon fiber is 20-40mm, and the length of the unit cathode is 10-300 mm.
As a further preferable scheme, the unit anode comprises a graphite block, carbon fiber cloth and an anode lead, the graphite block is wrapped by the carbon fiber cloth to form a packaging structure, and then the anode lead penetrates through the carbon fiber cloth wrapped by the graphite block to form a string shape.
As a further preferable scheme, the length, width and height of the graphite block are 2cm-4 cm.
Compared with the prior art, the invention has the beneficial effects that:
the unit cathode can enrich anaerobic microorganisms on the surface of an electrode to grow in a traditional anaerobic zone, so that the concentration of anaerobic sludge is improved; the unit cathode can provide electrons for the anaerobic microorganisms, stimulate the growth of the aerobic microorganisms, improve the reduction rate and the reduction efficiency of the anaerobic microorganisms on the azo organic pollutants, and realize the decomposition and decoloration of azo groups of azo dyes; the unit anode is arranged in a traditional aerobic area, and the reduced azo organic pollutants are further degraded by utilizing the oxidation function of the anode, so that the toxicity is further reduced, and the biodegradability of the pollutants is improved.
The method utilizes electrochemistry to assist the azo dye wastewater treatment, the azo group reduction fracture decoloration effect of azo organic pollutants is achieved at the cathode, the pollutants reduced by the cathode can be further oxidized and degraded by the anode, meanwhile, the energy generated by the reduction of the cathode and the oxidation of organic matters by the anode can be utilized, the purposes of low energy consumption and low pollution are achieved, and a solution scheme and a technical approach can be provided for the efficient biological decoloration and detoxification of the azo organic wastewater.
And the electrochemical auxiliary technology has the advantages of convenient maintenance, low cost, simple equipment, no secondary pollution and the like, is environment-friendly, reasonable and effective for degrading azo pollutants, can realize deep conversion of azo organic matters into biological low/non-toxic degradation products, and enhances the efficiency and the speed of treating azo organic wastewater by a biological method.
Fourthly, the unit cathode and the unit anode are arranged in the anaerobic zone and the aerobic zone in a combined mode, and the sizes of the unit cathode and the unit anode can be reasonably customized according to the conditions of the existing anaerobic zone and the existing aerobic zone to be modified; meanwhile, the unit cathode and the unit anode can be flexibly replaced according to actual use conditions, and the maintenance is convenient.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a view showing a manufacturing process of a unit cathode;
fig. 4 is a view showing a manufacturing process of the unit anode.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
As shown in fig. 1 and fig. 2, the electrochemical biological accelerated treatment reaction device for azo dye wastewater of the present invention comprises an anaerobic-aerobic bioreactor body 1, wherein a plurality of partition plates are arranged in the anaerobic-aerobic bioreactor body 1, the partition plates divide the reactor body into 1-2 anaerobic reaction zones 2, 1-2 anoxic reaction zones 3 and 3-5 aerobic reaction zones 4, each partition plate is provided with a channel, and water flow takes an S-shaped flow path in the anaerobic reaction zone 2, the anoxic reaction zone 3 and the aerobic reaction zone 4;
the anaerobic reaction zone 2 is provided with a water inlet zone 5, a water flow propeller 7 and a unit cathode 11, the anoxic reaction zone 3 is internally provided with the water flow propeller 7, and the aerobic reaction zone 4 is provided with an aeration device 8, the water flow propeller 7, a water outlet zone 6 and a unit anode 12.
The unit cathode 11 of the anaerobic reaction zone 2 and the unit anode 12 of the aerobic reaction zone 4 are connected with an external power supply 9 and an external resistor 10 by leads.
As shown in fig. 3, the unit cathode 11 is formed by a plurality of carbon fiber wire brushes 15 in a spiral shape, the carbon fiber wire brushes 15 are divided into stainless steel wires 14 and carbon fibers 13, the carbon fiber wire brushes 15 are formed by twisting the carbon fibers 13 around the stainless steel wires 14, a in the figure represents twisting, and B represents a spiral shape.
The diameter of the stainless steel wire 14 is 0.25-0.5mm, the length of the carbon fiber 13 is 20-40mm, and the length of the unit cathode after being screwed is 10-300 mm.
As shown in fig. 4, the unit anode 12 includes a graphite block 16 and a carbon fiber cloth 17, the graphite block 16 is wrapped by the carbon fiber cloth 17 to form a packaging structure, and an anode lead 18 penetrates through the carbon fiber cloth wrapped by the graphite block to form a string, wherein C in the figure indicates the wrapping string.
The length, width and height of the graphite block 16 are 2cm-4 cm.
Specifically, an external power supply 9 is connected with an external resistor 10, the negative pole of the power supply is connected with a unit cathode 11 through a lead, and the positive pole of the power supply is connected with a unit anode 12 through a lead.
The unit cathodes 11 are vertically suspended in the anaerobic reactor.
The intelligent aeration device 8 is provided with a dissolved oxygen detector and an information transmission and feedback system, and automatically increases the air volume when the detected dissolved oxygen is less than 1.0mg/L and automatically stops aeration when the dissolved oxygen is more than 2.0mg/L according to the set dissolved oxygen value.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The utility model provides an azo-dye waste water's electrochemistry biological accelerated treatment reaction unit which characterized in that: the anaerobic and aerobic bioreactor comprises an anaerobic and aerobic bioreactor body (1), wherein the anaerobic and aerobic bioreactor body (1) is divided into an anaerobic reaction zone (2), an anoxic reaction zone (3) and an aerobic reaction zone (4) by a plurality of partition plates, each partition plate is provided with a channel, water flow is in an S-shaped flow path in the anaerobic reaction zone (2), the anoxic reaction zone (3) and the aerobic reaction zone (4), a water inlet zone (5) is arranged at one end position of the anaerobic reaction zone (2) far away from the channels, and a water outlet zone (6) is arranged at one end position of the aerobic reaction zone (4) far away from the channels;
a unit cathode (11) and a water flow propeller (7) are arranged in the anaerobic reaction area (2), and the water flow propeller (7) in the anaerobic reaction area (2) propels water to the anoxic reaction area (3);
a water flow propeller (7) is arranged in the anoxic reaction zone (3), and the water flow propeller (7) in the anoxic reaction zone (3) propels water to the aerobic reaction zone (4);
the aerobic reaction zone (4) is internally provided with a unit anode (12) and a water flow propeller (7), and the water flow propeller (7) in the anaerobic reaction zone (2) propels water to the water outlet zone (6).
2. The electrochemical biological accelerated treatment reaction device for the azo dye wastewater as claimed in claim 1, wherein: an aeration device (8) is arranged at the bottom of the aerobic reaction zone (4).
3. The electrochemical biological accelerated treatment reaction device for the azo dye wastewater as claimed in claim 1, wherein: the unit cathode (11) and the unit anode (12) are both connected with an external power supply (9) outside the anaerobic and aerobic bioreactor body (1) through a circuit, and an external resistor (10) is arranged on the circuit.
4. The electrochemical biological accelerated treatment reaction device for the azo dye wastewater as claimed in claim 1, wherein: the unit cathode (11) is formed by spirally winding a plurality of carbon fiber steel wire brushes (15), the carbon fiber steel wire brushes (15) are divided into stainless steel wires (14) and carbon fibers (13), and the carbon fiber steel wire brushes (15) are formed by twisting the carbon fibers (13) around the stainless steel wires (14).
5. The electrochemical biological accelerated treatment reaction device of azo dye wastewater as claimed in claim 4, characterized in that: the diameter of the stainless steel wire (14) is 0.25-0.5mm, the length of the carbon fiber (13) is 20-40mm, and the length of the unit cathode (11) is 10-300 mm.
6. The electrochemical biological accelerated treatment reaction device for the azo dye wastewater as claimed in claim 1, wherein: the unit anode (12) comprises a graphite block (16), carbon fiber cloth (17) and an anode lead (18), wherein the graphite block (16) is wrapped by the carbon fiber cloth (17) to form a packaging structure, and the carbon fiber cloth wrapped by the graphite block is penetrated by the anode lead (18) to form a string shape.
7. The electrochemical biological accelerated treatment reaction device of azo dye wastewater as claimed in claim 6, characterized in that: the length, width and height of the graphite block (16) are 2cm-4 cm.
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| CN202010799667.8A CN112010420A (en) | 2020-08-11 | 2020-08-11 | Electrochemical biological accelerated treatment reaction device for azo dye wastewater |
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| CN202010799667.8A CN112010420A (en) | 2020-08-11 | 2020-08-11 | Electrochemical biological accelerated treatment reaction device for azo dye wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114772876A (en) * | 2022-06-23 | 2022-07-22 | 深圳永清水务有限责任公司北京分公司 | Bioelectrochemical system for high-salinity wastewater treatment |
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Effective date of registration: 20211227 Address after: 224599 No.1, hope Avenue Middle Road, Yancheng City, Jiangsu Province Applicant after: YANCHENG INSTITUTE OF TECHNOLOGY Applicant after: Yancheng Institute of Technology Technology Transfer Center Co.,Ltd. Address before: 224599 No.1, hope Avenue Middle Road, Yancheng City, Jiangsu Province Applicant before: YANCHENG INSTITUTE OF TECHNOLOGY |
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