CN117466501A - Sewage aeration method with deodorization function - Google Patents

Sewage aeration method with deodorization function Download PDF

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Publication number
CN117466501A
CN117466501A CN202311828021.8A CN202311828021A CN117466501A CN 117466501 A CN117466501 A CN 117466501A CN 202311828021 A CN202311828021 A CN 202311828021A CN 117466501 A CN117466501 A CN 117466501A
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aeration
real
time
standard
sewage
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CN117466501B (en
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田金华
任斌
李健
杨美荣
张文峰
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Shandong Public Environmental Protection Technology Group Co ltd
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Shandong Public Environmental Protection Technology Group Co ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F7/00Aeration of stretches of water
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/02Temperature
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/22O2
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/02Odour removal or prevention of malodour
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Activated Sludge Processes (AREA)

Abstract

The invention relates to the technical field of sewage treatment, in particular to a sewage aeration method with a deodorizing function, which comprises the following steps of S1, collecting sewage; step S2, stirring and oxygenating; s3, adding deodorizing particles; s4, adsorption treatment; and S5, filtering. According to the invention, through accurately regulating and controlling the stirring and mixing state in the sewage aeration treatment process, the gas-liquid contact area is increased, meanwhile, the sewage aeration treatment duration is reduced, the equipment energy consumption is saved, the stirring rate and the oxygenation capacity are adaptively regulated according to the characteristic of bubbles in a sewage aeration image to characterize the oxygenation efficiency of sewage aeration treatment, the active mud is ensured to be fully contacted with reducing substances in sewage, the sewage temperature in the aeration treatment process is monitored, the phenomenon that the growth of microbial flora is not favored due to overhigh temperature is avoided, so that the dissolved oxygen efficiency is reduced is caused, and the sewage is purified to meet the emission requirement by adsorption treatment, so that the sewage aeration treatment efficiency is improved.

Description

Sewage aeration method with deodorization function
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sewage aeration method with a deodorizing function.
Background
In the process of sewage collection, temporary storage and treatment, a large amount of malodorous gas is generated due to the decay of organic matters and the decomposition of microorganisms, the malodorous gas is rich in variety and mainly comprises ammonia gas, hydrogen sulfide, methyl mercaptan, dimethyl disulfide, trimethylamine and the like, in the process of sewage treatment, air is forcedly introduced into the sewage by using a certain method and equipment, so that the sewage in a pool is in contact with the air to oxygenate, the liquid is stirred, the transfer of oxygen in the air into the liquid is accelerated, suspended matters in the pool are prevented from sinking, the contact of the organic matters in the pool with microorganisms and dissolved oxygen is enhanced, the organic matters in the sewage are subjected to oxidative decomposition, and the process of forcedly oxygenating the sewage is called aeration; common methods for odor treatment include a washing method, a biological deodorization method, a photocatalytic oxidation method, an active carbon adsorption method and the like, wherein the biological deodorization method enables odor substances to be oxidized and degraded into odorless substances by utilizing the metabolism activity of microorganisms, has high odor purification efficiency, can treat high-molecular and multi-component odor substances, has no secondary pollution, and needs proper temperature and humidity.
Chinese patent publication No.: CN105084654a discloses a method for deodorizing sewage, which has the technical points that the microorganism flows through the sewage to achieve the effect of removing odor; therefore, in the existing sewage treatment technology, a sludge aeration treatment method is lacked, the oxygen content and the stirring and mixing state in the aeration and oxygenation process can be accurately regulated, the excessively high aeration quantity is avoided, the provided oxygen is excessively high, the energy consumption is increased, and therefore the deodorizing effect is guaranteed, and the deodorizing efficiency is improved.
Disclosure of Invention
Therefore, the invention provides a sewage aeration method with a deodorizing function, which is used for solving the problem of low oxygenation efficiency caused by the lack of accurate regulation and control of oxygen content and stirring and mixing states in the oxygenation process in the prior art, so that the provided oxygen is excessive and energy consumption is increased.
In order to achieve the above object, the present invention provides a sewage aeration method having a deodorizing function, comprising,
step S1, injecting sewage to be treated into an aeration tank for precipitation, and carrying out aeration treatment on the sewage to be treated when the sewage to be treated in the aeration tank is precipitated to form a microorganism slurry layer;
s2, introducing air into sewage to be treated in a stirring state through a gas conveying pipeline, acquiring a sewage aeration image through a camera device, and acquiring characteristics of aeration bubbles according to the sewage aeration image so as to correct stirring and mixing parameters of the aeration tank, so that the real-time densification rate of the aeration bubbles reaches a preset standard;
the stirring and mixing parameters comprise preset stirring speed and preset air flow, and the characteristics of aeration bubbles comprise real-time bubble quantity, real-time bubble area and real-time compactness;
step S3, when the real-time compactness of the aeration bubbles is smaller than the standard compactness range and the real-time aeration time is longer than the standard aeration time, conveying the deodorizing particles to the gas conveying pipeline through a first conveying pipeline by a first fan so that the deodorizing particles flow into the aeration tank along with air;
s4, when the real-time densification rate is judged to be within the standard densification rate range, conveying the activated carbon particles to the gas conveying pipeline through a second conveying pipeline by a second fan so that the activated carbon particles flow into the aeration tank along with air to perform adsorption treatment on sewage to be treated;
and S5, starting a circulating filter to filter the activated carbon particles.
Further, in the step S2, a standard bubble quantity range of aeration bubbles is set, a sewage aeration image on the surface of the aeration tank is acquired through a camera device, each aeration bubble in the sewage aeration image is identified and outline marks are simulated, the number of the obtained outline marks is recorded as the real-time bubble quantity of the aeration bubbles, the real-time bubble quantity is judged according to the standard bubble quantity range,
if the real-time bubble quantity is smaller than the standard bubble quantity range, sequentially judging the real-time bubble areas according to the standard bubble areas to determine whether to correct the preset air flow;
if the number of the real-time bubbles is larger than the range of the standard number of the bubbles, comparing the real-time aeration temperature with the standard aeration temperature to select an adjustment mode of stirring and mixing parameters of the aeration tank.
Further, in the step S2, the standard bubble area and the preset air flow of the bubbles are set, when the real-time bubble quantity is judged to be smaller than the standard bubble quantity range, the areas corresponding to the marked simulation outlines in the sewage aeration image are respectively obtained and recorded as real-time bubble areas, the real-time bubble areas corresponding to the bubbles are sequentially judged according to the standard bubble areas,
if the real-time bubble area is smaller than the standard bubble area, performing secondary marking on the corresponding bubbles until finishing the operation of judging the real-time bubble area of each bubble in turn according to the standard bubble area, and comparing the real-time densification rate with the standard densification rate range to determine whether to adjust the stirring state of the aeration tank;
and if the real-time bubble areas are all larger than the standard bubble areas, correcting the preset air flow according to the average area of the aeration bubbles and the standard bubble areas.
Further, in the step S2, a standard density rate range of bubbles is set, when the real-time bubble area is smaller than the standard bubble area, the corresponding bubbles are secondarily marked, the percentage of the number of the bubbles which are secondarily marked in each simulation contour and the number of the real-time bubbles of the aeration bubbles is obtained and recorded as the real-time density rate, the real-time density rate is compared with the standard density rate range,
if the real-time compactness is smaller than the standard compactness range, comparing the standard aeration duration with the real-time aeration duration to determine whether to adjust the stirring state of the aeration tank;
and if the real-time densification rate is larger than the standard densification rate range, correcting the preset air flow according to the real-time densification rate.
Further, in the step S2, a standard aeration duration and a preset stirring speed for performing aeration treatment on the sewage to be treated are set, when the real-time densification rate is determined to be smaller than the standard densification rate range or the number of real-time bubbles is within the standard bubble number range, the starting duration of the stirrer is obtained as the real-time aeration duration of the sewage to be treated, the standard aeration duration is compared with the real-time aeration duration,
and if the real-time aeration duration is less than or equal to the standard aeration duration, adjusting the preset stirring speed according to the real-time aeration duration.
Further, in the step S2, when it is determined that the real-time densification rate is smaller than the standard densification rate range, or the number of real-time bubbles is within the standard bubble number range,
and if the real-time aeration time length is longer than the standard aeration time length, controlling the first fan to be started so as to convey the deodorizing particles to the gas conveying pipeline through the first conveying pipeline, and enabling the deodorizing particles to flow into the aeration tank along with air.
Further, in the step S2, a standard aeration temperature is set, when the real-time bubble quantity is determined to be larger than the standard bubble quantity range, the real-time aeration temperature of the sewage to be treated is obtained, the real-time aeration temperature is compared with the standard aeration temperature,
and if the real-time aeration temperature is higher than the standard aeration temperature, adjusting the preset stirring speed.
Further, in the step S2, a standard aeration temperature is set, when the real-time bubble quantity is determined to be larger than the standard bubble quantity range, the real-time aeration temperature of the sewage to be treated is obtained,
and if the real-time aeration temperature is less than or equal to the standard aeration temperature, adjusting the preset air flow.
Further, in the step S5, a standard deviation value is set, when it is determined that the real-time densification rate is within the standard densification rate range, the second fan is started, the timer is started to count time, activated carbon particles are conveyed to the gas conveying pipeline through the second conveying pipeline, activated carbon particles flow into the aeration tank along with air to perform adsorption treatment on sewage to be treated, a sewage adsorption image is obtained through the image capturing device in a preset shooting period, a real-time brightness difference value and a real-time difference value of the sewage to be treated are calculated according to the sewage adsorption image, and the standard deviation value and the real-time difference value are compared to determine whether to control the second fan to be closed.
Further, the initial odor concentration of the reducing substances in the sewage to be treated and the real-time odor concentration detected by the preset monitoring period are obtained,
correcting the first standard bubble number and the second standard bubble number according to the initial odor concentration and the real-time odor concentration to obtain Nb1 '=Nb1× [1+ (Cs-Cc)/Cc ], and Nb2' =Nb2× [1- (Cs-Cc)/Cc ];
wherein Nb1 'is the number of corrected first standard bubbles, nb2' is the number of corrected second standard bubbles, cc is the initial odor concentration of reducing substances in the sewage to be treated, and Cs is the real-time odor concentration detected in a preset monitoring period.
Compared with the prior art, the method has the beneficial effects that the stirring and mixing state in the sewage aeration treatment process is accurately regulated and controlled, the gas-liquid contact area is increased, meanwhile, the sewage aeration treatment time is reduced, the equipment energy consumption is saved, the size and the area characteristics of aeration bubbles are obtained according to the obtained sewage aeration image, the oxygenation efficiency of sewage aeration treatment is represented, the stirring rate and the oxygenation capacity are adaptively regulated, the active mud in a microbial mud layer is fully contacted with reducing substances in sewage, the sewage temperature in the sewage aeration treatment process is monitored, the growth of microbial flora is prevented from being adversely affected due to the fact that the temperature is too high, the reduction of dissolved oxygen efficiency is caused, the sewage aeration treatment is guaranteed to be full through adsorption treatment of sewage, the sewage is purified to meet the discharge requirement, and the sewage aeration treatment efficiency is improved.
Further, the sewage aeration state is detected through the combined image recognition technology, the intelligence of the sewage aeration method is improved, the real-time air bubble quantity is judged according to the standard air bubble quantity range, the oxygenation state is judged according to the air bubble characteristics in the sewage aeration, if the real-time air bubble quantity is judged to be smaller than the standard air bubble quantity range, the air bubble size in the aeration tank is continuously judged, if the real-time air bubble quantity is judged to be larger than the standard air bubble quantity range, the aeration quantity in the aeration tank is higher, at the moment, the machine operation energy consumption is higher, the real-time sewage temperature is timely detected, and the influence on the oxygenation efficiency of the aeration tank due to the fact that the operation of the aeration device is transferred into sewage is avoided.
Further, the size of the bubbles in the aeration tank is judged to detect the contact area of gas and liquid in the aeration tank, if the real-time bubble areas are judged to be larger than the standard bubble areas, the oxygen content in the aeration tank is increased by increasing the preset air flow to improve the oxygenation efficiency, the calculation is simple and direct, and if the real-time bubble areas are judged to be smaller than the standard bubble areas, the distribution of the bubbles is detected to analyze and judge the stirring state of the aeration tank.
Further, the real-time densification rate is compared with the standard densification rate range to judge the uniformity degree of aeration bubbles in the aeration tank, if the real-time densification rate is judged to be larger than the standard densification rate range, the aeration bubbles in the aeration tank are uniformly distributed, the volumes of the bubbles are smaller, the whole distribution is denser, the energy consumption is prevented from being increased due to larger oxygenation by reducing the preset air flow, and meanwhile, if the real-time densification rate is judged to be smaller than the standard densification rate range, the aeration bubbles are uneven in size, the number of the bubbles with larger volumes is larger, namely the oxygenation efficiency is lower, the aeration duration is judged to analyze the reason of the low oxygenation efficiency.
Further, the standard aeration duration is compared with the real-time aeration duration, if the real-time aeration duration is smaller than or equal to the standard aeration duration, the oxygenation efficiency is lower and is caused by short oxygenation duration, the gas-liquid contact area is increased by increasing the stirring speed, so that the oxygenation efficiency is increased, if the real-time aeration duration is longer than the standard aeration duration, the oxygenation efficiency is lower and is caused by the fact that part of pollutant particles incapable of being decomposed through microorganism oxidation are collected on the surface of sewage, the gas-liquid contact area is reduced, and the sewage in the aeration tank is adsorbed, so that the sewage reaches the dischargeable standard.
Further, by detecting the aeration temperature of the aeration tank, comparing the real-time aeration temperature with the standard aeration temperature, if the real-time aeration temperature is judged to be higher than the standard aeration temperature, the method indicates that the temperature condition of the oxidative decomposition reaction of the activated sludge is increased due to the fact that the rotating speed of the stirrer is too high, the activated sludge is unfavorable to the growth of the activated sludge, the preset stirring speed is reduced, the effect of heat transfer is slowed down, the temperature of the sewage is increased due to the fact that the temperature of the sewage is increased due to the heat effect caused by the equipment operation and the water flow vortex, and the oxygenation efficiency is reduced.
Further, by detecting the color change degree of the sewage, the second fan is controlled to start and stop, if the real-time difference value is smaller than or equal to the standard difference value, the color change of two sewage static images acquired in the current shooting period is not obvious, namely the sewage adsorption treatment is completed, the second fan is required to be controlled to be closed in time, if the real-time difference value is larger than the standard difference value, the sewage adsorption treatment is performed, the sewage purification degree is intelligently monitored, and the energy consumption loss caused by the endless running of equipment is avoided.
Further, as the reducing substances in the sewage to be treated and the activated sludge are subjected to oxidation reaction to decompose, the oxygen demand in the sewage aeration treatment is reduced, and the corresponding aeration treatment time length is reduced, the first standard bubble number and the second standard bubble number are corrected according to the real-time content of the reducing substances in the sewage to be treated, so that the sewage aeration treatment time length is reduced, the equipment energy consumption is saved, and the judgment accuracy and the intelligence of the system are improved.
Drawings
FIG. 1 is a flow chart of a sewage aeration method with deodorization function according to an embodiment of the present invention;
FIG. 2 is a schematic view showing the structure of a sewage aeration apparatus having a deodorizing function according to an embodiment of the present invention;
FIG. 3 is a logic flow diagram of controlling the second fan on in accordance with an embodiment of the present invention;
FIG. 4 is a logic flow diagram of controlling the first fan on in accordance with an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1 and 2, fig. 1 is a flow chart of a sewage aeration method with deodorization function according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram of a sewage aeration device with deodorization function according to an embodiment of the present invention, including an aeration tank 1, a gas delivery pipe 2, a first fan 3, a first delivery pipe 4, a second fan 5, a second delivery pipe 6, a circulation filter 7, and an image pickup device 8, the present invention provides a sewage aeration method with deodorization function, including,
step S1, sewage to be treated is injected into an aeration tank 1 for precipitation, and aeration treatment is carried out on the sewage to be treated when the sewage to be treated in the aeration tank 1 is precipitated to form a microorganism slurry layer;
s2, introducing air into sewage to be treated in a stirring state through a gas conveying pipeline 2, acquiring a sewage aeration image through a camera device 8, and acquiring characteristics of aeration bubbles according to the sewage aeration image so as to correct stirring and mixing parameters of the aeration tank 1, so that the real-time compactness of the aeration bubbles reaches a preset standard;
the stirring and mixing parameters comprise preset stirring speed and preset air flow, and the characteristics of aeration bubbles comprise real-time bubble quantity, real-time bubble area and real-time compactness;
step S3, when the real-time compactness of the aeration bubbles is smaller than the standard compactness range and the real-time aeration time is longer than the standard aeration time, conveying the deodorizing particles to the gas conveying pipeline 2 through the first conveying pipeline 4 by the first fan 3 so that the deodorizing particles flow into the aeration tank 1 along with air;
step S4, when the real-time densification rate is judged to be within the standard densification rate range, the activated carbon particles are conveyed to the gas conveying pipeline 2 through the second conveying pipeline 6 by the second fan 5, so that the activated carbon particles flow into the aeration tank 1 along with air to perform adsorption treatment on sewage to be treated;
step S5, the circulation filter 7 is turned on to filter the activated carbon particles.
Through carrying out accurate regulation and control to the stirring mixed state of sewage aeration treatment process, when promoting gas-liquid area of contact, reduce sewage aeration treatment duration, save equipment energy consumption, through obtaining sewage aeration image, obtain aeration bubble's size and area characteristic according to the image, with the oxygenation efficiency of characterization sewage aeration treatment, the adjustment stirring rate of adaptability and the oxygenation volume, the active mud in the guarantee microorganism mud layer fully contacts with the reduction material in the sewage, through the sewage temperature of control sewage aeration treatment in-process, avoid the too high growth that is unfavorable for microorganism fungus crowd of temperature, thereby lead to dissolving oxygen efficiency reduction, through carrying out adsorption treatment to sewage, guarantee sewage aeration treatment is abundant, purify sewage and reach the emission requirement, improve sewage aeration treatment's efficiency.
Referring to FIG. 3, a logic flow diagram of controlling the second fan on according to an embodiment of the present invention is shown;
specifically, in the step S2, a standard bubble quantity range of aeration bubbles is set, a sewage aeration image on the surface of the aeration tank 1 is acquired through the camera device 8, each aeration bubble in the sewage aeration image is identified and outline marked in a simulation manner, the number of the obtained outline marks is recorded as the real-time bubble quantity of the aeration bubbles, the real-time bubble quantity is judged according to the standard bubble quantity range,
if the real-time bubble quantity is smaller than the standard bubble quantity range, sequentially judging the real-time bubble areas according to the standard bubble areas to determine whether to correct the preset air flow;
if the real-time bubble quantity is within the standard bubble quantity range, not adjusting the stirring state of the aeration tank 1;
if the number of the real-time bubbles is larger than the range of the standard number of the bubbles, comparing the real-time aeration temperature with the standard aeration temperature to select an adjustment mode of the stirring and mixing parameters of the aeration tank 1.
The standard bubble number range set in the embodiment is related to the volume of the aeration tank 1, the microorganism number in the microorganism slurry layer and the concentration of the sludge mixed solution, and is generally set between 500 and 5000 and adaptively selected according to the volume of the actual aeration tank 1;
the sewage aeration state is detected through the combined image recognition technology, the intelligence of the sewage aeration method is improved, the real-time bubble quantity is judged according to the standard bubble quantity range, the oxygenation state is judged according to the bubble characteristics in sewage aeration, if the real-time bubble quantity is judged to be smaller than the standard bubble quantity range, the size of the bubbles in the aeration tank 1 is continuously judged, if the real-time bubble quantity is judged to be larger than the standard bubble quantity range, the aeration quantity in the aeration tank 1 is higher, at the moment, the machine operation energy consumption is higher, the real-time sewage temperature is timely detected, and the influence on the oxygenation efficiency of the aeration tank 1 due to the fact that the operation of the aeration device is transferred into sewage is avoided.
Specifically, in the step S2, the standard bubble area and the preset air flow rate Qc of the bubbles are set, when the real-time bubble quantity is determined to be smaller than the standard bubble quantity range, the areas corresponding to the marked simulation outlines in the sewage aeration image are respectively obtained and recorded as real-time bubble areas, the real-time bubble areas corresponding to the bubbles are sequentially determined according to the standard bubble areas,
if the real-time bubble area is smaller than the standard bubble area, performing secondary marking on the corresponding bubbles until finishing the operation of judging the real-time bubble area of each bubble in turn according to the standard bubble area, and comparing the real-time densification rate with the standard densification rate range to determine whether to adjust the stirring state of the aeration tank 1;
if the real-time bubble areas are all larger than the standard bubble area, correcting the preset air flow according to the average area of the aeration bubbles and the standard bubble area to be Qc' =Qc× [1+ (Px-Pb)/Px ];
wherein Qc' represents the corrected preset air flow calculated according to the average area of the aeration bubbles and the standard bubble area, px represents the average value of the areas of the bubbles corresponding to each simulated contour in the sewage aeration image, and Pb represents the set standard bubble area.
The standard bubble area set in the embodiment is influenced by the volume of the actual aeration tank 1 and the microorganism quantity in the microorganism slurry layer, is generally set between 3mm and 5mm, and is adaptively selected according to the concentration of the reducing substances in the sewage to be treated;
through judging the bubble size in aeration tank 1 to detect the area of contact of gas-liquid in aeration tank 1, if judge that real-time bubble area is all greater than standard bubble area, increase the oxygen content in aeration tank 1 through increasing preset air flow, with promotion oxygenation efficiency, it is simple directly to calculate, if judge that there is real-time bubble area to be less than standard bubble area, through detecting the distribution of bubble, with the stirring state to aeration tank 1 carries out analysis and judgement.
Specifically, in the step S2, a standard density rate range of bubbles is set, when the real-time bubble area is smaller than the standard bubble area, the corresponding bubbles are marked secondarily, the percentage of the number of the bubbles with the secondary marks and the number of the real-time bubbles of the aeration bubbles in each simulation contour is obtained and recorded as the real-time density rate, the real-time density rate is compared with the standard density rate range,
if the real-time compactness is smaller than the standard compactness range, comparing the standard aeration duration with the real-time aeration duration to determine whether to adjust the stirring state of the aeration tank 1;
if the real-time densification rate is within the standard densification rate range, not adjusting the stirring state of the aeration tank 1, and performing the judgment operation of the step S4;
if the real-time densification rate Fs is greater than the standard densification rate range Fb, correcting the preset air flow rate Qc to be Qc' =qc× [1- (Fs-Fb)/Fs ];
the standard density rate range set in the embodiment represents the uniformity degree of aeration bubbles, generally, the set standard density rate range is between 50% and 90%, and is adaptively selected according to the actual sewage treatment requirement;
the real-time densification rate is compared with the standard densification rate range to judge the uniformity degree of aeration bubbles in the aeration tank 1, if the real-time densification rate is judged to be larger than the standard densification rate range, the aeration bubbles in the aeration tank 1 are uniformly distributed, the volumes of the bubbles are smaller, the whole distribution is denser, the energy consumption is increased by reducing the preset air flow, the oxygenation capacity is prevented from being larger, and meanwhile, if the real-time densification rate is judged to be smaller than the standard densification rate range, the aeration bubbles are uneven in size, the number of the bubbles with larger volumes is larger, namely the oxygenation efficiency is lower, the aeration duration is judged, and the reason of the low oxygenation efficiency is analyzed.
Referring to fig. 4, a logic flow diagram of controlling the first fan to be turned on according to an embodiment of the present invention is shown;
specifically, in the step S2, a standard aeration duration and a preset stirring speed for aeration treatment of the sewage to be treated are set, when it is determined that the real-time densification rate is smaller than the standard densification rate range or the number of real-time bubbles is within the standard bubble number range, the starting duration of the stirrer is obtained as the real-time aeration duration of the sewage to be treated, the standard aeration duration is compared with the real-time aeration duration,
if the real-time aeration duration Ts is smaller than or equal to the standard aeration duration Tb, the preset stirring speed Vc is adjusted to be Vc' =Vcx1+ (Tb-Ts)/Ts;
if the real-time aeration time period is longer than the standard aeration time period, the first fan 3 is controlled to be started so as to convey the deodorizing particles to the gas conveying pipeline 2 through the first conveying pipeline 4, so that the deodorizing particles flow into the aeration tank 1 along with air.
The standard aeration duration set in the embodiment represents the stirring and mixing duration of the aeration tank 1, is influenced by the concentration of the sewage to be treated and the structural design of the aeration tank 1, is generally set between 2 hours and 5 hours, and is adaptively selected according to the actual sewage treatment requirement;
the standard aeration duration is set to be compared with the real-time aeration duration, if the real-time aeration duration is smaller than or equal to the standard aeration duration, the oxygenation efficiency is lower due to short-term oxygenation, the gas-liquid contact area is increased by increasing the stirring speed, so that the oxygenation efficiency is increased, if the real-time aeration duration is longer than the standard aeration duration, pollutant particles which are lower due to the fact that part of pollutant particles cannot pass through the oxidative decomposition of microorganisms are collected on the surface of sewage, the gas-liquid contact area is reduced, and the sewage in the aeration tank 1 is subjected to adsorption treatment, so that the sewage reaches the dischargeable standard.
Specifically, in the step S2, a standard aeration temperature is set, when the real-time bubble quantity is determined to be larger than the standard bubble quantity range, the real-time aeration temperature of the sewage to be treated is obtained, the real-time aeration temperature is compared with the standard aeration temperature,
if the real-time aeration temperature Gs is greater than the standard aeration temperature Gb, adjusting the preset stirring speed Vc to Vc' =Vc× [1- (Gs-Gb)/Gs ];
if the real-time aeration temperature is less than or equal to the standard aeration temperature, adjusting the preset air flow to be Qc "= Qc× [1- (Gs-Gb)/Gs ];
the standard aeration temperature represents the optimal temperature of the concentration of dissolved oxygen, the temperature is favorable for the growth and metabolism of activated sludge, the oxygenation efficiency in the aeration tank 1 is the highest and is generally between 25 ℃ and 35 ℃, the set standard aeration temperature is also influenced by the type of polluted water and the structural design of the aeration tank 1, and is adaptively selected according to the actual sewage treatment requirement;
by detecting the aeration temperature of the aeration tank 1, comparing the real-time aeration temperature with the standard aeration temperature, if the real-time aeration temperature is judged to be higher than the standard aeration temperature, the temperature condition of the oxidative decomposition reaction of the activated sludge is increased due to the fact that the rotating speed of the stirrer is too high, the activated sludge is unfavorable for growth, the preset stirring speed is reduced, the heat transfer effect is slowed down, the temperature of the sewage is increased due to the fact that the heat effect caused by equipment operation and water flow vortex is avoided, and the oxygenation efficiency is reduced.
Specifically, in the step S5, a standard deviation value is set, when it is determined that the real-time densification rate is within the standard densification rate range, the second fan 5 is turned on, a timer is turned on to time, activated carbon particles are conveyed to the gas conveying pipeline 2 through the second conveying pipeline 6, activated carbon particles flow into the aeration tank 1 along with air to perform adsorption treatment on sewage to be treated, the image pickup device 8 respectively obtains sewage adsorption images at the initial time and the final time of a preset photographing period, calculates a real-time brightness difference value and a real-time difference value of the sewage to be treated according to the sewage adsorption images, compares the standard deviation value with the real-time difference value,
if the real-time difference value is smaller than or equal to the standard difference value, the second fan 5 is controlled to be turned off;
if the real-time difference value is larger than the standard difference value, the second fan 5 is not controlled to be turned off, and the sewage adsorption image of the next preset shooting period is continuously acquired for judgment.
The standard deviation value set in the embodiment represents the change of the brightness of the sewage image, is theoretically close to zero, is influenced by the actual sewage treatment requirement and the water quality, is generally set to 10% -20%, and is adaptively selected according to the actual sewage treatment requirement and the water quality;
the real-time brightness difference value is the difference value between a first brightness value corresponding to the sewage adsorption image shot at the initial moment and a second brightness value corresponding to the sewage adsorption image shot at the last moment;
the real-time difference value is the ratio of the first brightness value to the real-time brightness difference value;
the first pixel value and the second brightness value are respectively the brightness values of sewage in the sewage adsorption images shot at the initial moment and the final moment;
the preset shooting period can be set to be between 20 minutes and 30 minutes, and is adaptively selected according to the actual aeration duration and sewage aeration treatment requirements;
by detecting the color change degree of the sewage, the second fan 5 is controlled to start and stop, if the real-time difference value is smaller than or equal to the standard difference value, the color change of two sewage static images acquired in the current shooting period is not obvious, namely the sewage adsorption treatment is finished, the second fan needs to be controlled to be closed in time, if the real-time difference value is larger than the standard difference value, the sewage adsorption treatment is performed, the purification degree of the sewage is intelligently monitored, and the energy consumption loss caused by the endless running of equipment is avoided.
In particular to the method for obtaining the initial odor concentration of the reducing substances in the sewage to be treated and the real-time odor concentration detected by a preset monitoring period,
correcting the first standard bubble number and the second standard bubble number according to the initial odor concentration and the real-time odor concentration to obtain Nb1 '=Nb1× [1+ (Cs-Cc)/Cc ], and Nb2' =Nb2× [1- (Cs-Cc)/Cc ];
wherein Nb1 'is the number of corrected first standard bubbles, nb2' is the number of corrected second standard bubbles, cc is the initial odor concentration of reducing substances in the sewage to be treated, and Cs is the real-time odor concentration detected in a preset monitoring period.
The first standard bubble number and the second standard bubble number constitute a standard bubble number range.
The reduction substances in the sewage to be treated and the activated sludge are subjected to oxidation reaction to be decomposed, so that the oxygen demand in the sewage aeration treatment is reduced, and the corresponding aeration treatment time length is reduced.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A sewage aeration method with deodorization function is characterized by comprising the following steps,
step S1, injecting sewage to be treated into an aeration tank for precipitation, and carrying out aeration treatment on the sewage to be treated when the sewage to be treated in the aeration tank is precipitated to form a microorganism slurry layer;
s2, introducing air into sewage to be treated in a stirring state through a gas conveying pipeline, acquiring a sewage aeration image through a camera device, and acquiring characteristics of aeration bubbles according to the sewage aeration image so as to correct stirring and mixing parameters of the aeration tank, so that the real-time densification rate of the aeration bubbles reaches a preset standard;
the stirring and mixing parameters comprise preset stirring speed and preset air flow, and the characteristics of aeration bubbles comprise real-time bubble quantity, real-time bubble area and real-time compactness;
step S3, when the real-time compactness of the aeration bubbles is smaller than the standard compactness range and the real-time aeration time is longer than the standard aeration time, conveying the deodorizing particles to the gas conveying pipeline through a first conveying pipeline by a first fan so that the deodorizing particles flow into the aeration tank along with air;
s4, when the real-time densification rate is judged to be within the standard densification rate range, conveying the activated carbon particles to the gas conveying pipeline through a second conveying pipeline by a second fan so that the activated carbon particles flow into the aeration tank along with air to perform adsorption treatment on sewage to be treated;
and S5, starting a circulating filter to filter the activated carbon particles.
2. The sewage aeration method with deodorizing function according to claim 1, wherein in the step S2, a standard bubble number range of aeration bubbles is set, a sewage aeration image of the surface of the aeration tank is obtained by an image pickup device, each aeration bubble in the sewage aeration image is identified and contour marks are simulated, the number of the simulated contour marks is obtained and recorded as the real-time bubble number of the aeration bubbles, the real-time bubble number is determined based on the standard bubble number range,
if the real-time bubble quantity is smaller than the standard bubble quantity range, sequentially judging the real-time bubble areas according to the standard bubble areas to determine whether to correct the preset air flow;
if the number of the real-time bubbles is larger than the range of the standard number of the bubbles, comparing the real-time aeration temperature with the standard aeration temperature to select an adjustment mode of stirring and mixing parameters of the aeration tank.
3. The sewage aeration method with deodorizing function according to claim 2, wherein in the step S2, a standard bubble area and a preset air flow are set, and when the real-time bubble number is determined to be smaller than the standard bubble number range, the areas corresponding to the marked simulation outlines in the sewage aeration image are respectively obtained and recorded as real-time bubble areas, the real-time bubble areas corresponding to the bubbles are sequentially determined according to the standard bubble areas,
if the real-time bubble area is smaller than the standard bubble area, performing secondary marking on the corresponding bubbles until finishing the operation of judging the real-time bubble area of each bubble in turn according to the standard bubble area, and comparing the real-time densification rate with the standard densification rate range to determine whether to adjust the stirring state of the aeration tank;
and if the real-time bubble areas are all larger than the standard bubble areas, correcting the preset air flow according to the average area of the aeration bubbles and the standard bubble areas.
4. The sewage aeration method with deodorizing function according to claim 3, wherein in the step S2, a standard density ratio range of bubbles is set, when it is determined that the real-time bubble area is smaller than the standard bubble area, the corresponding bubbles are secondarily marked, the percentage of the number of bubbles with the secondary marking completed in each simulation contour and the number of real-time bubbles of the aeration bubbles is recorded as a real-time density ratio, the real-time density ratio is compared with the standard density ratio range,
if the real-time compactness is smaller than the standard compactness range, comparing the standard aeration duration with the real-time aeration duration to determine whether to adjust the stirring state of the aeration tank;
and if the real-time densification rate is larger than the standard densification rate range, correcting the preset air flow according to the real-time densification rate.
5. The sewage aeration method with deodorizing function according to claim 4, wherein in the step S2, a standard aeration duration and a preset agitation speed for aeration treatment of sewage to be treated are set, when it is determined that the real-time densification rate is smaller than the standard densification rate range or the number of real-time bubbles is within the standard number of bubbles, the start duration of the agitator is obtained as the real-time aeration duration of sewage to be treated, the standard aeration duration is compared with the real-time aeration duration,
and if the real-time aeration duration is less than or equal to the standard aeration duration, adjusting the preset stirring speed according to the real-time aeration duration.
6. The sewage aeration method with a deodorizing function according to claim 4, wherein, in the step S2, when it is determined that the real-time densification rate is less than the standard densification rate range, or the number of real-time bubbles is within the standard bubble number range,
and if the real-time aeration time length is longer than the standard aeration time length, controlling the first fan to be started so as to convey the deodorizing particles to the gas conveying pipeline through the first conveying pipeline, and enabling the deodorizing particles to flow into the aeration tank along with air.
7. The sewage aeration method with deodorizing function according to claim 2, wherein in the step S2, a standard aeration temperature is set, and when it is determined that the number of real-time bubbles is greater than the standard bubble number range, a real-time aeration temperature of the sewage to be treated is obtained, and the real-time aeration temperature is compared with the standard aeration temperature,
and if the real-time aeration temperature is higher than the standard aeration temperature, adjusting the preset stirring speed.
8. The sewage aeration method with deodorizing function according to claim 2, wherein in the step S2, a standard aeration temperature is set, and when it is determined that the real-time bubble number is greater than the standard bubble number range, the real-time aeration temperature of the sewage to be treated is obtained,
and if the real-time aeration temperature is less than or equal to the standard aeration temperature, adjusting the preset air flow.
9. The sewage aeration method with the deodorizing function according to claim 1, wherein in the step S5, a standard difference value is set, when it is determined that the real-time densification rate is within the standard densification rate range, the second fan is started, a timer is started for timing, activated carbon particles are conveyed to the gas conveying pipeline through a second conveying pipeline, the activated carbon particles flow into the aeration tank along with air to perform adsorption treatment on sewage to be treated, a sewage adsorption image is acquired through the image pickup device in a preset shooting period, a real-time brightness difference value and a real-time difference value of the sewage to be treated are calculated according to the sewage adsorption image, and the standard difference value and the real-time difference value are compared to determine whether to control the second fan to be turned off.
10. The sewage aeration method with deodorizing function according to claim 1, wherein the initial odor concentration of the reducing substances in the sewage to be treated and the real-time odor concentration detected by the preset monitoring period are obtained,
correcting the first standard bubble number and the second standard bubble number according to the initial odor concentration and the real-time odor concentration to obtain Nb1 '=Nb1× [1+ (Cs-Cc)/Cc ], and Nb2' =Nb2× [1- (Cs-Cc)/Cc ];
wherein Nb1 'is the number of corrected first standard bubbles, nb2' is the number of corrected second standard bubbles, cc is the initial odor concentration of reducing substances in the sewage to be treated, and Cs is the real-time odor concentration detected in a preset monitoring period.
CN202311828021.8A 2023-12-28 2023-12-28 Sewage aeration method with deodorization function Active CN117466501B (en)

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