CN110902974A - Sewage deep purification and water quality improvement treatment system and method - Google Patents
Sewage deep purification and water quality improvement treatment system and method Download PDFInfo
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- CN110902974A CN110902974A CN201911314413.6A CN201911314413A CN110902974A CN 110902974 A CN110902974 A CN 110902974A CN 201911314413 A CN201911314413 A CN 201911314413A CN 110902974 A CN110902974 A CN 110902974A
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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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
- C02F3/28—Anaerobic digestion 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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Abstract
The invention discloses a sewage deep purification and water quality improvement treatment system and method, wherein the treatment system comprises an oxidation reaction tower and a reduction reaction tower, the oxidation reaction tower is provided with a first water inlet, a gas inlet, a first water outlet and a first gas outlet, the first water inlet is communicated with sewage, the gas inlet is communicated with an ozone oxidant, the reduction reaction tower is provided with a second water inlet, a second water outlet and a second gas outlet, the second water inlet is connected with the first water outlet, and the second water inlet is communicated with a carbon source. The processing method comprises the following steps: introducing the sewage and an ozone oxidant into an oxidation reaction tower to perform oxidation reaction, then introducing the sewage into a reduction reaction tower, and simultaneously adding a carbon source into the reduction reaction tower to perform reduction reaction on the sewage. The system and the method are used for solving the problem that COD (chemical oxygen demand) and total nitrogen exceed standards in effluent water quality indexes in the process of upgrading and transforming water quality in a sewage treatment plant.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a system and a method for deeply purifying and improving water quality of sewage.
Background
With the development of economy in China, population and environmental problems become increasingly prominent in the process of urbanization, a large amount of industrial wastewater and domestic sewage flow into rivers, lakes or underground water to cause serious pollution to water bodies, so that the development of domestic water and fishery is greatly influenced, and the treatment of urban sewage becomes an important factor restricting the development of the country. In order to protect the environment, the country sets up strict sewage treatment and discharge standards, and the standard of urban sewage discharge is continuously improved from the primary B standard in the original discharge Standard of pollutants for municipal wastewater treatment plant GB18918-2002 to the primary A or higher standard. The national development of the action plan for preventing and treating water pollution in 2015, 4 and 16 days, proposes to strengthen the urban domestic pollution control and accelerate the construction and the transformation of urban sewage treatment facilities, and the improvement of the urban sewage treatment discharge standard is in great trend.
However, in a specific operation, many municipal sewage treatment plants are affected by technology or capital and the like, and cannot meet relevant emission requirements. The water is promoted to the first grade A or higher surface IV type water from the first grade B standard, and two difficulties mainly exist in indexes, one is the problem of COD, and the other is the problem of total nitrogen.
After the wastewater treatment plant has implemented the primary a standard, much attention must be paid to the formation of COD in the influent water. There are many COD configurations, some of which are biodegradable by sewage treatment plants and some of which are not biodegradable by regenerants from sewage treatment plants.
Since the sewage treatment plant mainly degrades pollutants in water through biochemical action, the key to whether the COD of the whole sewage treatment plant can reach the standard is to solve the problem of nondegradable COD.
The total nitrogen removal in sewage treatment plants is mainly carried out by biological denitrification, in which denitrification is carried out after nitrification. After the water temperature of the sewage treatment plant is lower than 15 ℃, biological denitrification is obviously inhibited. In winter, the difficulty is particularly great when the nitrogen and phosphorus removal is to be realized and the emission reaches the standard. Yet another is the problem with carbon sources. Sufficient carbon source is necessary to achieve biological denitrification. Without enough carbon source, stable denitrification is difficult to realize, and therefore the stable standard can not be reached.
Disclosure of Invention
The invention aims to provide a system and a method for treating sewage by deeply purifying and improving water quality, which are used for solving the problem that COD (chemical oxygen demand) and total nitrogen exceed standards in effluent water quality indexes in the process of upgrading and transforming water quality in a sewage treatment plant.
The system for deeply purifying and improving the water quality of the sewage comprises an oxidation reaction tower and a reduction reaction tower, wherein a first water inlet, an air inlet, a first water outlet and a first air outlet are formed in the oxidation reaction tower, the first water inlet is communicated with the sewage, the air inlet is communicated with an ozone oxidant, a second water inlet, a second water outlet and a second air outlet are formed in the reduction reaction tower, the second water inlet is connected with the first water outlet, and the second water inlet is also communicated with a carbon source.
The system for deeply purifying and improving the water quality of the sewage comprises at least two oxidation reaction towers, wherein the oxidation reaction towers are arranged in series, a first water inlet of the oxidation reaction tower positioned at the head end of the series is communicated with the sewage, a first water outlet of the oxidation reaction tower positioned at the tail end of the series is connected with a second water inlet, and an air inlet of at least one oxidation reaction tower is communicated with an ozone oxidant.
According to the sewage deep purification and water quality improvement treatment system, at least two reduction reaction towers are arranged in series, a second water inlet of the reduction reaction tower positioned at the head end of the series is connected with a first water outlet of the oxidation reaction tower positioned at the tail end of the series, and a second water inlet of the reduction reaction tower positioned at the head end of the series is communicated with a carbon source.
The invention relates to a sewage deep purification and water quality improvement treatment system, wherein a first water inlet of an oxidation reaction tower positioned at the head end of a series is communicated with sewage in a specific mode: the first water inlet of the oxidation reaction tower positioned at the head end of the series connection is connected with one end of a water inlet pipeline, the other end of the water inlet pipeline is communicated with sewage, and a water inlet flow meter and water supply equipment are arranged on the water inlet pipeline.
The sewage deep purification and water quality improvement treatment system comprises the following specific modes that an air inlet of at least one oxidation reaction tower is communicated with an ozone oxidant: the air inlet of at least one oxidation reaction tower is connected with the one end of admission line, the other end of admission line is connected with oxidation generator, oxidation generator produces ozone oxidant, still be connected with air feed equipment on the admission line, be equipped with the flowmeter of admitting air on the admission line of the air inlet department of oxidation reaction tower.
The system for deeply purifying and improving the water quality of the sewage comprises a reduction reaction tower, wherein a second water inlet of the reduction reaction tower is communicated with a carbon source, and the specific mode is as follows: and a second water inlet of the reduction reaction tower positioned at the head end of the series is connected with a carbon source adding device for containing a carbon source.
According to the sewage deep purification and water quality improvement treatment system, a first air outlet of an oxidation reaction tower is connected with a first exhaust pipe, a first sensor and a first electromagnetic valve are arranged on the first air outlet, a tail gas detector and a tail gas eliminator are arranged on the first exhaust pipe, and the first sensor, the first electromagnetic valve, the tail gas detector, the tail gas eliminator and an oxidation generator are all connected with a control cabinet.
According to the sewage deep purification and water quality improvement treatment system, a second air outlet of the reduction reaction tower is connected with a second exhaust pipe, a second sensor and a second electromagnetic valve are arranged on the second air outlet, and the second sensor and the second electromagnetic valve are both connected with the control cabinet.
According to the sewage deep purification and water quality improvement treatment system, a second water outlet of a reduction reaction tower at the tail end of the series is connected with a water outlet pipe, a nitrate sensor is arranged on the water outlet pipe and connected with a control cabinet, and the control cabinet is connected with a carbon source adding device.
The invention discloses a sewage deep purification and water quality improvement treatment method, which comprises the following steps:
introducing the sewage and an ozone oxidant into an oxidation reaction tower to perform oxidation reaction,
introducing the sewage subjected to oxidation reaction into a reduction reaction tower from an oxidation reaction tower, simultaneously adding a carbon source into the reduction reaction tower to perform reduction reaction on the sewage,
and discharging the purified water obtained through the reduction reaction from the reduction reaction tower.
The invention relates to a sewage deep purification and water quality improvement treatment system and a method, wherein sewage is introduced into an oxidation reaction tower through a first water inlet, an ozone oxidant is introduced into the oxidation reaction tower through a gas inlet to perform oxidation reaction with the sewage, after the oxidation reaction, COD (chemical oxygen demand) of the sewage is reduced, gas in the oxidation reaction tower is discharged from a first gas outlet, the sewage after the oxidation reaction is discharged out of the oxidation reaction tower through a first water outlet, then the sewage enters a reduction reaction tower from a second water inlet, simultaneously a carbon source is added into the reduction reaction tower through a second water inlet, the sewage performs reduction reaction in the reduction reaction tower and generates nitrogen, so that the total nitrogen content in the sewage is reduced, and the generated nitrogen is discharged into the atmosphere from a second gas outlet of the reduction reaction tower. The sewage is changed into purified water after the reduction reaction in the reduction reaction tower, and the purified water is discharged from a second water outlet of the reduction reaction tower. Therefore, the method can solve the problem that COD and total nitrogen in the effluent quality index exceed the standard in the water quality upgrading and modifying process of the sewage treatment plant.
The invention will be further explained with reference to the drawings.
Drawings
FIG. 1 is a schematic structural diagram of a system for advanced wastewater purification and water quality improvement in accordance with the present invention;
FIG. 2 is a schematic view of an oxidation reaction tower in the present invention;
FIG. 3 is a flow chart of a method for advanced purification and water quality improvement of sewage in the present invention.
Detailed Description
As shown in fig. 1 and fig. 2, the system for advanced wastewater purification and water quality improvement in the present invention includes an oxidation reaction tower 1 and a reduction reaction tower 17, wherein the oxidation reaction tower 1 is provided with a first water inlet 15, an air inlet, a first water outlet 16 and a first air outlet, the first water inlet 15 is communicated with wastewater, the air inlet is communicated with an ozone oxidant, the reduction reaction tower 17 is provided with a second water inlet, a second water outlet and a second air outlet, the second water inlet is connected with the first water outlet 16, and the second water inlet is further communicated with a carbon source.
In the system for advanced purification and water quality improvement of sewage, the number of the oxidation reaction towers 1 is at least two, in the embodiment, the number of the oxidation reaction towers 1 is six, the oxidation reaction towers 1 are arranged in series, a first water inlet 15 of the oxidation reaction tower 1 at the head end of the series is communicated with sewage, a first water outlet 16 of the oxidation reaction tower 1 at the tail end of the series is connected with a second water inlet, and an air inlet of at least one oxidation reaction tower 1 is communicated with an ozone oxidant.
The first water outlet 16 is arranged at the upper part of the oxidation reaction tower 1, a water outlet flange is arranged on the first water outlet 16, and the water outlet flange of the upper oxidation reaction tower 1 is connected with the first water inlet 15 of the lower oxidation reaction tower 1 through a pipeline to complete the series arrangement.
The bottom of the oxidation reaction tower 1 is provided with the first water inlet 15 and the air inlet, and the first water inlet 15 and the air inlet are respectively provided with a flange for connecting a pipeline.
In the system for advanced wastewater purification and water quality improvement, the number of the reduction reaction towers 17 is at least two, in the embodiment, the number of the reduction reaction towers 17 is five, the reduction reaction towers 17 are arranged in series, a second water inlet of the reduction reaction tower 17 at the head end of the series is connected with a first water outlet 16 of the oxidation reaction tower 1 at the tail end of the series, and a second water inlet of the reduction reaction tower 17 at the head end of the series is communicated with a carbon source.
The second water outlet of the previous stage reduction reaction tower 17 is connected with the second water inlet of the next stage reduction reaction tower 17 through a pipeline, and the serial arrangement is completed. The bottom of the reduction reaction tower 17 is provided with the second water inlet, and the upper part is provided with the second water outlet.
As shown in fig. 1, the system for advanced purification and water quality improvement of sewage in the present invention comprises the following specific modes that the first water inlet 15 of the oxidation reaction tower 1 located at the head end of the series connection is communicated with sewage: the first water inlet 15 of the oxidation reaction tower 1 located at the head end of the series is connected with one end of the water inlet pipeline 9, the other end of the water inlet pipeline 9 is communicated with sewage, specifically, the other end of the water inlet pipeline 9 is the water inlet 6, and the sewage enters the water inlet pipeline 9 from the water inlet 6. And the water inlet pipeline 9 is provided with a water inlet flow meter 13 and a water supply device 4. In this embodiment, the water supply apparatus 4 is a water pump.
The sewage deep purification and water quality improvement treatment system comprises the following specific modes that an air inlet of at least one oxidation reaction tower 1 is communicated with an ozone oxidant: the air inlet of at least one oxidation reaction tower 1 is connected with one end of an air inlet pipeline 10, the other end of the air inlet pipeline 10 is connected with an oxidation generator 2, the oxidation generator 2 generates an ozone oxidant, the air inlet pipeline 10 is further connected with an air supply device 3, and an air inlet flow meter 12 is arranged on the air inlet pipeline 10 at the air inlet of the oxidation reaction tower 1. In this embodiment, the air supply device 3 is a fan.
As shown in fig. 1, in the present embodiment, six oxidation reaction towers 1 are provided, the intake ports of the first four oxidation reaction towers 1 counted from the head end of the series are connected to an intake duct 10, and intake air flow meters 12 are provided on the intake ducts 10 at the intake ports of the four oxidation reaction towers 1, respectively.
The air inlet is arranged at the bottom of the oxidation reaction tower 1 and is connected with an air inlet pipeline 10 through an air inlet flange.
In the system for deeply purifying and improving the water quality of the sewage, the specific way that the second water inlet of the reduction reaction tower 17 positioned at the head end of the series connection is communicated with the carbon source is as follows: a second water inlet of the reduction reaction tower 17 positioned at the head end of the series is connected with a carbon source adding device 20 for containing a carbon source. The carbon source adding equipment 20 is connected with the second water inlet through a carbon source adding pipeline 21.
As shown in fig. 2, a first gas outlet of the oxidation reaction tower 1 is connected to a first exhaust pipe 11, a first sensor 22 and a first electromagnetic valve 19 are arranged on the first gas outlet, a tail gas detector 14 and a tail gas eliminator 18 are arranged on the first exhaust pipe 11, and the first sensor 22, the first electromagnetic valve 19, the tail gas detector 14, the tail gas eliminator 18 and the oxidation generator 2 are all connected to the control cabinet 5.
In the system for deeply purifying and improving the water quality of the sewage, a second air outlet of the reduction reaction tower 17 is connected with a second exhaust pipe, a second sensor and a second electromagnetic valve are arranged on the second air outlet, and the second sensor and the second electromagnetic valve are both connected with the control cabinet 5.
According to the sewage deep purification and water quality improvement treatment system, a second water outlet of a reduction reaction tower 17 positioned at the tail end of a series is connected with a water outlet pipe 7, a nitrate sensor 23 is arranged on the water outlet pipe 7, the nitrate sensor 23 is connected with a control cabinet 5, and the control cabinet 5 is connected with a carbon source adding device 20.
As shown in FIG. 3, the method for advanced purification and water quality improvement of sewage in the invention comprises the following steps:
introducing the sewage and an ozone oxidant into an oxidation reaction tower to perform oxidation reaction,
introducing the sewage subjected to the oxidation reaction into a reduction reaction tower 17 from the oxidation reaction tower, simultaneously adding a carbon source into the reduction reaction tower 17 to perform the reduction reaction on the sewage,
the purified water obtained through the reduction reaction is discharged from the reduction reaction tower 17.
In the system and the method for treating sewage by deeply purifying and improving water quality, sewage is introduced into an oxidation reaction tower 1 through a first water inlet 15, an ozone oxidant is introduced into the oxidation reaction tower 1 through a gas inlet to perform oxidation reaction with the sewage, after the oxidation reaction, COD of the sewage is reduced, gas in the oxidation reaction tower 1 is discharged from a first gas outlet, the sewage after the oxidation reaction is discharged out of the oxidation reaction tower 1 through a first water outlet 16, then the sewage enters a reduction reaction tower 17 from a second water inlet, simultaneously a carbon source is added into the reduction reaction tower 17 through the second water inlet, the sewage performs reduction reaction in the reduction reaction tower 17 and generates nitrogen, so that the total nitrogen content in the sewage is reduced, and the generated nitrogen is discharged into the atmosphere from a second gas outlet of the reduction reaction tower 17. The sewage is changed into purified water after the reduction reaction in the reduction reaction tower 17, and the purified water is discharged from a second water outlet of the reduction reaction tower 17. Therefore, the method can solve the problem that COD and total nitrogen in the effluent quality index exceed the standard in the water quality upgrading and modifying process of the sewage treatment plant.
The mechanism of the reduction reaction of the sewage in the reduction reaction tower 17 is a biological denitrification mechanism, that is, a large amount of denitrifying bacteria exist in the reduction reaction tower 17, and the denitrifying bacteria decompose the nitrate in the water into nitrogen in the presence of a carbon source, so that the denitrification reduction reaction is completed. In the process of reduction reaction of sewage, the carbon source adding equipment 20 provides carbon source for the sewage, so that the denitrification reduction reaction can be smoothly completed.
The invention utilizes the oxidant to oxidize and decompose the non-biodegradable COD in the sewage, can solve the problem that the COD of the effluent of the sewage treatment plant exceeds the standard, and then utilizes the reduction method to solve the problem that the total nitrogen of the effluent of the sewage treatment plant exceeds the standard.
As shown in fig. 1 and fig. 2, the system for advanced wastewater purification and water quality improvement in the present invention further comprises a box 8, and the oxidation reaction tower 1, the reduction reaction tower 17, the oxidation generator 2, the air supply device 3, the water supply device 4, the carbon source adding device 20, and the control cabinet 5 are all arranged in the box 8. Ozone oxidant generated by the oxidation generator 2 and air generated by the air supply device 3 enter the oxidation reaction tower 1 through the air inlet pipeline 10, sewage to be treated enters from the first water inlet 15 at the bottom of the oxidation reaction tower 1 through the water supply device 4 through the water inlet pipeline 9, and after the sewage is reacted by the multistage oxidation reaction tower 1 and the multistage reduction reaction tower 17, the obtained purified water is discharged outside through the water outlet pipe 7, and various electric elements are integrated in the control cabinet 5 and used for controlling all devices in the box body 8 and matched sensors thereof.
The oxidation generator 2, the air supply device 3, the water supply device 4, the air inlet flow meter 12, the water inlet flow meter 13 and the tail gas detector 14 are all connected with the control cabinet 5 through power cables, namely, the power is provided by the control cabinet 5.
The air inlet flow meter 12, the water inlet flow meter 13, the first sensor 22, the first electromagnetic valve 19, the second sensor, the second electromagnetic valve, the tail gas detector 14 and the tail gas eliminator 18 are all connected with the control cabinet 5 through signal cables.
The control cabinet 5 is composed of a power system and a control system, wherein the control system adopts the technical scheme in the patent application with the application publication number of CN108919771A and the name of "a management system for intelligent control of water treatment equipment data acquisition and cloud transmission", which is not described herein again.
The invention is mainly applied to upgrading and transforming tail water of urban sewage treatment plants, so that the effluent is improved from the primary A standard in the pollutant discharge standard of urban sewage treatment plants GB18918-2002 to the surface IV water standard in the surface water environment quality standard GB 3838-2002. But is not limited thereto.
When the device is used, tail water of an urban municipal sewage treatment plant enters the oxidation reaction tower 1 through the water inlet 6 and the water supply equipment 4 and then enters the oxidation reaction tower 1 through the water inlet flow meter 13 along the water inlet pipeline 9, and in the oxidation reaction tower 1, an ozone oxidant generated by the oxidation generator 2 enters the oxidation reaction tower 1 through the air supply equipment 3 along the air inlet pipeline 10 through the air inlet flow meter 12 and is mixed with sewage to generate oxidation reaction.
The top of the oxidation reaction tower 1 is provided with a first sensor 22, unreacted oxidant is gathered at the top of the oxidation reaction tower 1, when a certain amount of oxidant is gathered, the first sensor 22 transmits a signal to the control cabinet 5, the control cabinet 5 controls the first electromagnetic valve 19 to be opened, the ozone oxidant which does not generate oxidation reaction passes through the first electromagnetic valve 19 at the top of the oxidation reaction tower 1 and enters the tail gas detector 14 through the first exhaust pipe 11, when the tail gas detector 14 detects residual ozone oxidant in the pipeline, the signal is sent to the control cabinet 5, and the control cabinet 5 controls the tail gas eliminator 18 to eliminate the residual ozone oxidant and then discharge the gas.
In the exhaust process, the tail gas detector 14 detects the concentration of the ozone oxidant remaining in the first exhaust pipe 11, and transmits a signal to the control cabinet 5, and the control cabinet 5 controls the working state of the oxidation generator 2 to increase or decrease the generation amount of the oxidant.
The sewage after the oxidation reaction enters the reduction reaction tower 17, the reduction reaction is carried out in the reaction tower, nitrogen is generated at the same time, the nitrogen is gathered at the top of the reduction reaction tower 17, when a certain amount of nitrogen is gathered, a second sensor 22 transmits a signal to the control cabinet 5, the control cabinet 5 controls the second electromagnetic valve to be opened, and the nitrogen is discharged through the second electromagnetic valve at the top of the reduction reaction tower 17 and the second exhaust pipe 11. The second sensor, the second solenoid valve, and the second exhaust pipe have the same structures as the first sensor 22, the first solenoid valve 19, and the first exhaust pipe 11 in fig. 2, except that the exhaust gas detector 14 and the exhaust gas eliminator 18 are not provided on the second exhaust pipe.
The sewage is subjected to a stepwise reaction in a reduction reaction tower 17 to obtain purified water, the purified water is discharged from a water outlet pipe 7, a nitrate sensor 23 on the water outlet pipe 7 collects the content of nitrate in the water and transmits a signal to a control cabinet 5, and the control cabinet 5 controls the dosage of a carbon source added by a carbon source adding device 20.
Through the control system, the tail water of the municipal sewage treatment plant can reach higher standard after being subjected to water body lifting treatment under the unattended condition.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. The utility model provides a sewage deep purification promotes quality of water processing system which characterized in that: including oxidation reaction tower and reduction reaction tower, be equipped with first water inlet, air inlet, first delivery port and first gas outlet on the oxidation reaction tower, first water inlet intercommunication sewage, the air inlet communicates ozone oxidant, be equipped with second water inlet, second delivery port and second gas outlet on the reduction reaction tower, the second water inlet is connected with first delivery port, the second water inlet still communicates the carbon source.
2. The system for deeply purifying and improving the quality of water for sewage treatment according to claim 1, which is characterized in that: the oxidation reaction towers are arranged in series, a first water inlet of the oxidation reaction tower at the head end of the series is communicated with sewage, a first water outlet of the oxidation reaction tower at the tail end of the series is connected with a second water inlet, and an air inlet of at least one oxidation reaction tower is communicated with an ozone oxidant.
3. The system for advanced wastewater purification and water quality improvement according to claim 2, which is characterized in that: the reduction reaction towers are arranged in series, a second water inlet of the reduction reaction tower positioned at the head end of the series is connected with a first water outlet of the oxidation reaction tower positioned at the tail end of the series, and a second water inlet of the reduction reaction tower positioned at the head end of the series is communicated with a carbon source.
4. The system for deeply purifying and improving the quality of water for sewage treatment according to claim 3, wherein the first water inlet of the oxidation reaction tower at the head end of the series connection is communicated with sewage in a specific mode that: the first water inlet of the oxidation reaction tower positioned at the head end of the series connection is connected with one end of a water inlet pipeline, the other end of the water inlet pipeline is communicated with sewage, and a water inlet flow meter and water supply equipment are arranged on the water inlet pipeline.
5. The system for advanced wastewater purification and water quality improvement according to claim 4, wherein the specific mode that the air inlet of the at least one oxidation reaction tower is communicated with the ozone oxidant is as follows: the air inlet of at least one oxidation reaction tower is connected with the one end of admission line, the other end of admission line is connected with oxidation generator, oxidation generator produces ozone oxidant, still be connected with air feed equipment on the admission line, be equipped with the flowmeter of admitting air on the admission line of the air inlet department of oxidation reaction tower.
6. The system for deeply purifying and improving the quality of water for sewage treatment according to claim 5, wherein the second water inlet of the reduction reaction tower at the head end of the series is communicated with a carbon source in a specific manner that: and a second water inlet of the reduction reaction tower positioned at the head end of the series is connected with a carbon source adding device for containing a carbon source.
7. The system for advanced wastewater purification and water quality improvement according to claim 6, which is characterized in that: the first gas outlet and the first exhaust pipe of oxidation reaction tower are connected, be equipped with first sensor and first solenoid valve on the first gas outlet, be equipped with tail gas detector and tail gas annihilator on the first exhaust pipe, first sensor, first solenoid valve, tail gas detector, tail gas annihilator and oxidation generator all are connected with the switch board.
8. The system for advanced wastewater purification and water quality improvement according to claim 7, which is characterized in that: and a second gas outlet of the reduction reaction tower is connected with a second exhaust pipe, a second sensor and a second electromagnetic valve are arranged on the second gas outlet, and the second sensor and the second electromagnetic valve are both connected with the control cabinet.
9. The system for advanced wastewater purification and water quality improvement according to claim 8, which comprises: and a second water outlet of the reduction reaction tower positioned at the tail end of the series is connected with a water outlet pipe, a nitrate sensor is arranged on the water outlet pipe, the nitrate sensor is connected with a control cabinet, and the control cabinet is connected with a carbon source adding device.
10. A sewage deep purification and water quality improvement treatment method is characterized by comprising the following steps:
introducing the sewage and an ozone oxidant into an oxidation reaction tower to perform oxidation reaction,
introducing the sewage subjected to oxidation reaction into a reduction reaction tower from an oxidation reaction tower, simultaneously adding a carbon source into the reduction reaction tower to perform reduction reaction on the sewage,
and discharging the purified water obtained through the reduction reaction from the reduction reaction tower.
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