CN115124152A - Self-discrimination type micro-nano aeration system and discrimination method based on water quality change - Google Patents

Self-discrimination type micro-nano aeration system and discrimination method based on water quality change Download PDF

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CN115124152A
CN115124152A CN202210293475.9A CN202210293475A CN115124152A CN 115124152 A CN115124152 A CN 115124152A CN 202210293475 A CN202210293475 A CN 202210293475A CN 115124152 A CN115124152 A CN 115124152A
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aeration
water
sewage
water quality
micro
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CN115124152B (en
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丁付革
周正兵
甘雁飞
沈志伟
张骏
陆剑
张晓雷
张恩波
杜成祥
孟学仕
熊壮
李星
蒋明月
成杰
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CCCC Shanghai Dredging Co Ltd.
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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
    • C02F7/00—Aeration of stretches of water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/001—Upstream control, i.e. monitoring for predictive control
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/003—Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/42—Liquid level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
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Abstract

The invention relates to a self-discriminant micro-nano aeration system and a discriminant method based on water quality change, wherein the system comprises a micro-nano aeration device, the micro-nano aeration device is communicated with a sewage treatment tank, and the sewage treatment tank is also communicated with a comprehensive control device; the controller analyzes the parameter C returned by the water quality monitoring system at the t moment ti And calculating the reduction rate K i And total score S p Whether the aeration and treatment of the sewage are continuously carried out or not is determined according to the pollutant reduction rate, the problem of insufficient aeration or excessive aeration caused by setting the aeration quantity by the sewage volume is solved, the high energy consumption is reduced, the method has the characteristics of automatic operation, high sewage treatment efficiency and low cost, and the technical support is provided for the treatment of the polluted water body.

Description

Self-discriminant micro-nano aeration system and method based on water quality change
Technical Field
The invention relates to the technical field of water environmental engineering, in particular to a self-discrimination type micro-nano aeration system and a discrimination method based on water quality change.
Background
With the increasing treatment of black and odorous water in China, various water purification technologies including aeration, water diversion and sewage flushing, sediment dredging and the like are applied to the restoration of river and lake water environments. The micro-nano aeration technology shows good technical advantages due to the characteristics of low investment, quick response, no secondary pollution and the like, and is often combined with in-situ remediation technologies such as artificial wetlands, plant floating beds and the like in recent years to achieve the purposes of oxygenation, precipitation, separation, decarburization and dephosphorization and the like in sewage. However, in the practical application process, due to the fact that a method for dynamically evaluating the combined effect of micro-nano aeration and in-situ remediation technology is lacked and empirical aeration is adopted, problems such as insufficient aeration or excessive aeration easily occur, the expected pollution treatment effect cannot be achieved, the energy utilization rate is low due to the fact that the method is not favorable for water environment remediation.
In the prior art, much attention is paid to how to improve the aerator itself to obtain the best aeration effect, such as application publication numbers: the invention of CN 111099753 discloses an aeration device for efficiently producing oxygen-enriched water by utilizing pressure drive; application publication No.: the invention of CN 113262656 prepares high-activity micro-nano bubbles with small size and strong oxygen carrying capacity through high-speed jet aeration and rotary pressurized cavitation processes; application publication No.: the invention of CN 111115793 realizes the resuspension of the filler by using the fluidization state of the micro-nano bubbles, so that the contact time of the micro-nano bubbles, the filler and the microorganisms is prolonged to improve the decomposition speed of the pollutants. However, the operation time of the aeration equipment is often controlled manually according to experience, whether aeration is performed or not can not be controlled according to the real-time change of the treated water quality, and the sewage treatment process is manually performed, so that the automation degree is low.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a self-discriminant micro-nano aeration system and a self-discriminant micro-nano aeration method based on water quality change, which are used for determining whether to continue to carry out aeration and treatment on sewage according to the pollutant reduction rate, so that the problem of insufficient aeration or excessive aeration caused by setting the aeration amount according to the sewage volume is solved, high energy consumption is reduced, the system has the characteristics of automatic operation, high sewage treatment efficiency and low cost, and technical support is provided for the treatment of polluted water.
The technical scheme is as follows: the invention relates to a self-discriminant micro-nano aeration system based on water quality change, which comprises a micro-nano aeration device, wherein the micro-nano aeration device is communicated with a sewage treatment tank, and the sewage treatment tank is also communicated with a comprehensive control device;
the micro-nano aeration device is provided with an air receiving port, a water inlet and a water outlet, the air receiving port is externally connected with a reaction gas, and the water inlet and the water outlet are communicated with a sewage treatment tank;
the sewage treatment tank comprises an aeration interface communicated with a water inlet and a water outlet, a group of sewage treatment equipment and a group of multi-parameter water quality sensors which are arranged in the sewage treatment tank, and the sewage treatment tank also comprises a sewage inlet and outlet;
the comprehensive control device comprises a controller, a water quality monitoring system and a group of water level sensors, wherein the controller is respectively in signal connection with the water quality monitoring system, at least one water level sensor, the micro-nano aeration device and a control switch of a sewage inlet and outlet.
Furthermore, the aeration interface comprises a first aeration interface and a second aeration interface, the first aeration interface is communicated with the water inlet, and the first aeration interface is arranged on the wall of the sewage treatment tank; the second aeration interface is communicated with the water outlet and is arranged at the bottom of the sewage treatment tank.
Further, the sewage inlet and outlet pool port is connected with a drainage passage, the drainage passage comprises a first drainage passage and a second drainage passage, the first drainage passage is externally connected with another sewage treatment device, and the second drainage passage is connected with a receiving water body.
Further, the sewage treatment equipment is a plant floating bed.
A self-discriminant micro-nano aeration system discrimination method based on water quality change comprises the following steps:
step 1, debugging an aeration system, and setting water quality monitoring parameters, wherein the water quality monitoring parameters comprise permanganate index, ammonia nitrogen, total nitrogen and total phosphorus, and the monitoring frequency is 30 min/time;
step 2, when the sewage is discharged into the sewage treatment tank and reaches the designated liquid level height, the water level sensor transmits a signal back to the controller, the controller controls the water quality monitoring system to start, and initial values C of various water quality parameters are measured oi I is 1, 2, 3 and 4, which respectively represent 4 water quality parameters of permanganate index, ammonia nitrogen, total nitrogen and total phosphorus;
step 3, after receiving a signal transmitted back by the water quality monitoring system, the controller controls the micro-nano aeration device to start, and after aeration, the gas-water mixture is discharged into the sewage pool again;
step 4, after the controller receives the signal sent back by the water quality monitoring system, the controller analyzes the parameter C sent back by the water quality monitoring system at the t moment ti And calculating the reduction rate K i And total score S p Reduction ratio K i The calculation formula of (a) is as follows:
Figure BDA0003561146210000021
i＝1，2，3，4；
if K i More than or equal to 90 percent, the score is 10, K i ≥80％，Score 9, and so on, K i If the score is more than 0, the score is 1; s. the p ＝∑K i ，i＝1，2，3，4，p＝1，2…n；
Total score S p The calculation formula of (a) is as follows:
S p ＝K 1+ K 2+ K 3+ K 4
if S p If the value is more than or equal to 36, entering the step 5,
if S p < 36 and
Figure BDA0003561146210000031
the process proceeds to step 6 where,
if S p < 36 and
Figure BDA0003561146210000032
the controller further calculates an aeration rate V (L/min) by the following calculation formula:
V＝-0.0143S p +0.7143；
the micro-nano aeration device performs aeration according to the aeration rate, and the step 4 is repeated;
step 5, the controller controls the micro-nano aeration device to stop aeration, meanwhile, the sewage inlet and outlet are opened, and the sewage is discharged into a receiving water body through a second water discharge passage;
step 6, the controller controls the micro-nano aeration device to stop aeration, simultaneously the sewage inlet and outlet are opened, and the sewage is discharged out of the system through the first drainage passage and enters another sewage treatment device for treatment;
and 7, when the water level in the sewage pool drops to the lowest value of the water level sensor, controlling the aeration system to be started again by the controller, and carrying out next aeration treatment.
Further, when the micro-nano aeration device is started in the step 3, the aeration rate of the micro-nano aeration device is 0.7L/min.
Further, another sewage treatment device in the step 6 is a biological filter.
Has the beneficial effects that: compared with the prior art, the invention has the advantages that:
(1) the aeration oxygenation power consumption in a general secondary biological treatment plant accounts for 60-70% of the whole power consumption, the energy consumption of the invention is related to the pollution degree of sewage, whether the sewage is continuously aerated and treated can be determined according to the pollutant reduction rate, the reasonable utilization of energy is realized, the low energy utilization rate caused by the problems of insufficient aeration or excessive aeration is avoided, and the invention has the characteristics of automatic operation and high sewage treatment efficiency.
(2) The labor cost of sewage treatment operation is reduced, the labor intensity is reduced, the treatment process does not need to be attended by personnel, and the next sewage treatment process is automatically started after the current sewage treatment is finished.
(3) The invention monitors 4 water quality parameters of permanganate index, ammonia nitrogen, total nitrogen and total phosphorus in the water, evaluates the pollution degree of the sewage through the total score of the four water quality parameters, creatively classifies the sewage treatment, saves energy and covers the pollutant index in the sewage in all directions.
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FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a flow chart of the present invention.
Detailed Description
The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.
The self-discriminant micro-nano aeration system based on the water quality change as shown in the figure 1 comprises a micro-nano aeration device 1, wherein the micro-nano aeration device is communicated with a sewage treatment tank, and a sewage treatment tank 2 is also communicated with a comprehensive control device 3;
the micro-nano aeration device 1 is provided with a gas port 1-1, a water inlet 1-2 and a water outlet 1-3, the gas port 1-1 is externally connected with a reaction gas, and the water inlet 1-2 and the water outlet 1-3 are communicated with a sewage treatment tank 2;
the sewage treatment tank 2 comprises an aeration interface communicated with a water inlet 1-2 and a water outlet 1-3, a group of sewage treatment equipment 2-3 and a group of multi-parameter water quality sensors 2-4 which are arranged in the sewage treatment tank 2, and the sewage treatment tank 2 also comprises a sewage inlet and outlet 2-5; the aeration interface comprises a first aeration interface 2-1 and a second aeration interface 2-2, the first aeration interface 2-1 is communicated with the water inlet 1-2, and the first aeration interface 2-1 is arranged on the wall of the sewage treatment tank; the second aeration interface 2-2 is communicated with the water outlet 1-3, and the second aeration interface 2-2 is arranged at the bottom of the sewage treatment tank. The sewage inlet and outlet port 2-5 is connected with a drainage passage, the drainage passage comprises a first drainage passage 2-5-1 and a second drainage passage 2-5-2, the first drainage passage 2-5-1 is externally connected with another sewage treatment device 4, and the second drainage passage 2-5-2 is connected with a receiving water body. The sewage treatment equipment 2-3 is a plant floating bed. The bottom of the sewage treatment tank 2 is provided with a sewage inlet 5, the sewage inlet 5 is connected with a sewage inlet pipe 6, and the sewage inlet pipe 6 is externally connected with equipment for generating sewage.
The comprehensive control device 3 comprises a controller 3-1, a water quality monitoring system 3-2 and a group of water level sensors 3-3, wherein the controller 3-1 is respectively in signal connection with the water quality monitoring system 3-2, at least one water level sensor 3-3, the micro-nano aeration device 1 and a control switch of a sewage inlet and outlet 2-4.
The arrow direction in fig. 1 is the movement direction of the sewage, and it can be known from the figure that the sewage enters from the sewage inlet 5, reacts in the sewage treatment tank, and enters different devices for treatment after reaching the classification standard.
Example 2
As shown in fig. 2, a method for discriminating a self-discrimination type micro-nano aeration system based on water quality change comprises the following steps:
step 1, debugging an aeration system, and setting water quality monitoring parameters, wherein the water quality monitoring parameters comprise permanganate index, ammonia nitrogen, total nitrogen and total phosphorus, and the monitoring frequency is 30 min/time.
Step 2, when the sewage is discharged into the sewage treatment tank and reaches the designated liquid level height, for example 3m, the water level sensor 3-3 transmits a return signal to the controller 3-1, the controller 3-1 controls the water quality monitoring system 3-2 to start, and the initial value C of each water quality parameter is measured oi And i is 1, 2, 3 and 4, which respectively represent 4 water quality parameters of permanganate index, ammonia nitrogen, total nitrogen and total phosphorus. E.g. C o1 Represents the initial value of permanganate, C o2 Represents the initial value of ammonia nitrogen, C o3 Represents the initial value of total nitrogen，C o4 Representing the initial value of total phosphorus.
Step 3, after receiving a signal transmitted back by the water quality monitoring system 3-2, the controller 3-1 controls the micro-nano aeration device 1 to start, and the gas-water mixture is discharged into the sewage pool again after aeration; when the micro-nano aeration device is started, the aeration rate is 0.7L/min.
Step 4, after the controller receives the signal sent back by the water quality monitoring system 3-2, the controller analyzes the parameter C sent back by the water quality monitoring system at the t moment ti And calculating the reduction rate K i And total score S p Reduction ratio K i The calculation formula of (a) is as follows:
Figure BDA0003561146210000051
i＝1，2，3，4；
above, C t1 Represents the value of permanganate at time t, C t2 Represents the value of ammonia nitrogen at the t moment, C t3 Representing the value of total nitrogen at time t, C t4 Representing the value of total phosphorus at time t. K is 1 Representing the rate of depletion of permanganate at time t, K 2 Representing the reduction rate of ammonia nitrogen at the t moment, K 3 Representing the reduction of total nitrogen at time t, K 4 Representing the rate of total phosphorus loss at time t.
If K i More than or equal to 90 percent, the score is 10, K i Score 9 when the ratio is more than or equal to 80 percent, and so on, K i If the score is more than 0, the score is 1; s p ＝∑K i ，i＝1，2，3，4，p＝1，2…n；
Total score S p The calculation formula of (a) is as follows:
S p ＝K 1+ K 2+ K 3+ K 4
if S p If the value is more than or equal to 36, entering the step 5,
if S p < 36 and
Figure BDA0003561146210000052
the process proceeds to step 6 where,
if S p < 36 and
Figure BDA0003561146210000053
the controller further calculates an aeration rate V (L/min) by the following calculation formula:
V＝-0.0143S p + 0.7143; the micro-nano aeration device performs aeration according to the aeration rate, and the step 4 is repeated; and repeating the step 4 until the step 5 or the step 6 is entered.
And 5, controlling the micro-nano aeration device to stop aeration by the controller, simultaneously opening the sewage inlet and outlet 2-5, and discharging the sewage into a receiving water body through the second water discharge passage 2-5-2.
Step 6, the controller controls the micro-nano aeration device to stop aeration, simultaneously the sewage inlet and outlet 2-5 is opened, and the sewage is discharged out of the system through the first water discharge passage 2-5-1 and enters another sewage treatment device 4 for treatment; another sewage treatment device 4 is a biofilter produced by Yinmbr-1 and having sewage treatment capacity of 0.3-500m, and is made by Yinmbr-1, a Weifang city Yinman environmental protection science and technology Limited company in Shandong province 3 /h。
And 7, when the water level in the sewage pool drops to the lowest value of the water level sensor, for example 2cm, controlling the aeration system to be started again by the controller, and carrying out next aeration treatment.
As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (6)

1. The utility model provides an aeration systems is received a little to self-discrimination based on quality of water changes, includes receives aeration equipment (1) a little, receive aeration equipment (1) a little and communicate its characterized in that with sewage treatment pond (2) a little: the sewage treatment tank (2) is also communicated with a comprehensive control device (3);
the micro-nano aeration device (1) is provided with an air receiving port (1-1), a water inlet (1-2) and a water outlet (1-3), the air receiving port (1-1) is externally connected with reaction gas, and the water inlet (1-2) and the water outlet (1-3) are communicated with the sewage treatment tank (2);
the sewage treatment tank (2) comprises an aeration interface communicated with the water inlet (1-2) and the water outlet (1-3), a group of sewage treatment equipment (2-3) and a group of multi-parameter water quality sensors (2-4) which are arranged in the sewage treatment tank (2), and the sewage treatment tank (2) also comprises a sewage inlet and outlet (2-5);
the comprehensive control device (3) comprises a controller (3-1), a water quality monitoring system (3-2) and a group of water level sensors (3-3), wherein the controller (3-1) is in signal connection with the water quality monitoring system (3-2), at least one water level sensor (3-3), the micro-nano aeration device (1) and a control switch of a sewage inlet and outlet pool port (2-4).
2. The self-discriminant micro-nano aeration system based on water quality change according to claim 1, wherein: the aeration interface comprises a first aeration interface (2-1) and a second aeration interface (2-2), the first aeration interface (2-1) is communicated with the water inlet (1-2), and the first aeration interface (2-1) is arranged on the wall of the sewage treatment tank; the second aeration interface (2-2) is communicated with the water outlet (1-3), and the second aeration interface (2-2) is arranged at the bottom of the sewage treatment tank.
3. The self-discriminant micro-nano aeration system based on water quality change according to claim 1, wherein: the sewage inlet and outlet pool port (2-5) is connected with a drainage passage, the drainage passage comprises a first drainage passage (2-5-1) and a second drainage passage (2-5-2), the first drainage passage (2-5-1) is externally connected with another sewage treatment device (4), and the second drainage passage (2-5-2) is connected with a receiving water body.
4. The self-discriminant micro-nano aeration system based on water quality change of claim 1, wherein: the sewage treatment equipment (2-3) is a plant floating bed.
5. A self-discriminant micro-nano aeration system discrimination method based on water quality change is characterized by comprising the following steps:
step 1, debugging the aeration system as claimed in claim 1, setting water quality monitoring parameters, wherein the water quality monitoring parameters comprise permanganate index, ammonia nitrogen, total nitrogen and total phosphorus, and the monitoring frequency is 30 min/time;
step 2, when the sewage is discharged into the sewage treatment tank and reaches the designated liquid level height, the water level sensor (3-3) transmits a signal back to the controller (3-1), the controller (3-1) controls the water quality monitoring system (3-2) to be started, and the initial value C of each water quality parameter is measured oi I is 1, 2, 3 and 4, which respectively represent 4 water quality parameters of permanganate index, ammonia nitrogen, total nitrogen and total phosphorus;
step 3, after receiving a signal transmitted back by the water quality monitoring system (3-2), the controller (3-1) controls the micro-nano aeration device (1) to start, and after aeration, the gas-water mixture is discharged into the sewage pool again;
step 4, after the controller receives the signal sent back by the water quality monitoring system (3-2), the controller analyzes the parameter C sent back by the water quality monitoring system at the t moment ti And calculating the reduction rate K i And total score S p Reduction ratio K i The calculation formula of (a) is as follows:
Figure FDA0003561146200000021
if K i More than or equal to 90 percent, the score is 10, K i More than or equal to 80 percent, the score is 9, and so on, K i If the score is more than 0, the score is 1; s p ＝∑K i ，i＝1，2，3，4，p＝1，2…n；
Total score S p The calculation formula of (c) is as follows:
S p ＝K 1+ K 2+ K 3+ K 4
if S p If the value is more than or equal to 36, entering the step 5,
if S p < 36 and
Figure FDA0003561146200000022
the process proceeds to step 6 in which,
if S p < 36 and
Figure FDA0003561146200000023
the controller further calculates the aeration rate V (L/min) according to the following calculation formula:
V＝-0.0143S p +0.7143；
at the moment, the micro-nano aeration device performs aeration according to the aeration rate, and the step 4 is repeated;
step 5, the controller controls the micro-nano aeration device to stop aeration, meanwhile, the sewage inlet and outlet (2-5) is opened, and the sewage is discharged into the receiving water body through the second water discharge passage (2-5-2);
step 6, the controller controls the micro-nano aeration device to stop aeration, simultaneously the sewage inlet and outlet (2-5) is opened, and the sewage is discharged out of the system through the first drainage passage (2-5-1) and enters another sewage treatment device (4) for treatment;
and 7, when the water level in the sewage pool drops to the lowest value of the water level sensor, controlling the aeration system to be started again by the controller, and carrying out next aeration treatment.
6. The method for discriminating a micro-nano aeration system based on water quality change according to claim 5, wherein:
and 3, when the micro-nano aeration device is started in the step 3, the aeration rate is 0.7L/min.
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JPH02131197A (en) * 1988-11-09 1990-05-18 Kaoru Mihashi Drain treatment process adjusting time ratio of aeration and non-aeration of intermittent aeration based on setting rate of sludge as indication
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