Deodorization method of rural domestic sewage treatment device

Abstract

The invention belongs to the technical field of sewage treatment, and provides a deodorization method of a rural domestic sewage treatment device. The method comprises the following steps: mounting a to-be-deodorized sewage treatment device or treatment unit, a telescopic gas-collecting hood, a fan, a gas-guide tube and an intelligent air volume control system in a closed house; odor collected by the telescopic gas collecting hood and air are compressed by the fan and then enter the aeration system, the odor escapes in the biological contact oxidation pond in the form of tiny bubbles, and microorganisms in the biological contact oxidation pond remove pollutants in sewage through synergistic metabolism, so that the odor is purified at the same time. According to the invention, no additional treatment device is needed, devices and auxiliary projects required by conventional sewage treatment facilities are fully utilized, the odor is eliminated while the sewage is treated, and the method has the advantages of simplicity and convenience in operation and low investment and operation cost, and is suitable for simple, convenient and rapid deodorization of sewage treatment devices in rural areas.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a deodorization method for a rural domestic sewage treatment device. Background Art

[0002] The commonly used sewage treatment process flow is grille - hydrolysis acidification - aerobic tank or biological contact oxidation. The grille and hydrolysis acidification treatment units generate odorous gases such as hydrogen sulfide, methanethiol, nitrogen - containing compounds, and compounds composed of carbon, hydrogen or carbon, hydrogen, and oxygen (such as lower alcohols, aldehydes, fatty acids) due to being in anoxic or anaerobic states for a long time, which affects the air quality of the surrounding environment and the normal production and life of residents.

[0003] To solve this problem, urban sewage treatment plants seal the process sections that generate odors, collect the odors and then enter the deodorization process unit for treatment, such as physicochemical adsorption, thermochemical combustion, biodegradation, and plasma electrolysis. In the rural domestic sewage treatment process, this method not only increases the investment and operation costs, but also puts forward higher requirements for the operation and maintenance of treatment facilities, which does not conform to the purpose of low - cost, easy - maintenance, and simple - operation of rural sewage treatment.

[0004] Therefore, it is of great significance to provide a deodorization method for a rural domestic sewage treatment device with low cost, easy maintenance, and simple operation. Summary of the Invention

[0005] The purpose of the present invention is to provide a deodorization method for a rural domestic sewage treatment device in order to overcome the deficiencies of the prior art.

[0006] To achieve the above - mentioned invention purpose, the present invention provides the following technical solutions:

[0007] The present invention provides a deodorization method for a rural domestic sewage treatment device, comprising the following steps:

[0008] 1) Install the sewage treatment device or treatment unit to be deodorized, telescopic gas collection hood, fan, air duct, and air volume intelligent control system in a closed house;

[0009] 2) Compress the odorous gas collected by the telescopic gas collection hood and air by the fan and then enter the aeration system, and escape in the form of micro - bubbles in the biological contact oxidation tank;

[0010] The telescopic gas collection hood is located above the sewage treatment device or treatment unit to be deodorized;

[0011] The odorous gas inlet of the fan is connected to the telescopic gas collection hood through an air duct;

[0012] The aeration system is connected to the air outlet of the fan;

[0013] The aeration system is installed at the bottom of the biological contact oxidation tank for aerobic biodegradation.

[0014] Preferably, the enclosed house has a hollow structure.

[0015] Preferably, the telescopic gas hood has a telescopic control unit that adjusts the size of the opening of the telescopic gas hood.

[0016] Preferably, an odor sensing device is installed at the bottom end of the telescopic gas hood.

[0017] Preferably, the biological contact oxidation tank is an enclosed treatment device or an in-ground treatment device.

[0018] Preferably, the fan is a centrifugal fan or a Roots blower, and the air volume intelligent control system dynamically adjusts the air volume ratio of air to odor according to the odor concentration.

[0019] Preferably, the aeration system uses ultra-micro pore aerators with a bubble diameter ≤ 1 mm.

[0020] Preferably, the biological contact oxidation tank is equipped with hanging fillers, and the filling rate of the fillers is 70 - 80%.

[0021] The beneficial effects of the present invention include:

[0022] Compared with the traditional deodorization process, the deodorization process of the rural domestic sewage treatment device of the present invention does not require the addition of new treatment devices. The present invention makes full use of the devices and auxiliary projects required for conventional sewage treatment facilities, including equipment and building units such as fans, enclosed houses, aeration systems, and biological contact oxidation tanks, to eliminate odors while treating sewage, and has the advantages of simple operation, low investment and operation costs, and is suitable for simple and rapid deodorization of sewage treatment devices in rural areas. Description of the Drawings

[0023] Figure 1 It is a diagram of the rural domestic sewage treatment device of the present invention. Among them, 1 is an enclosed house, 2 is a fan, 21 is the odor inlet of the fan, 22 is the air outlet of the fan, 23 is the air inlet of the fan, 24 is the air volume intelligent control system, 3 is a gas guide pipe, 4 is a telescopic gas hood, 5 is an odor sensing device, 6 is a mechanical grille, 7 is a telescopic control unit, 8 is an aeration system, and 9 is a biological contact oxidation tank. Detailed Embodiments

[0024] The present invention provides a method for deodorizing a rural domestic sewage treatment device, which comprises the following steps:

[0025] 1) Install the sewage treatment device or treatment unit to be deodorized, the telescopic gas hood, the fan, the gas guide pipe, and the air volume intelligent control system in the enclosed house;

[0026] 2) The odor and air collected by the telescopic air hood enter the aeration system after being compressed by the fan, and escape in the form of tiny bubbles in the biological contact oxidation tank;

[0027] The telescopic air hood is located above the sewage treatment device or treatment unit to be deodorized;

[0028] The odor inlet of the fan is connected to the telescopic air hood through a conduit;

[0029] The aeration system is connected to the air outlet of the fan;

[0030] The aeration system is installed at the bottom of the biological contact oxidation tank for aerobic biodegradation.

[0031] The rural domestic sewage treatment device of the present invention is as Figure 1 shown, and includes an enclosed house 1, a fan 2, a conduit 3, a telescopic air hood 4, an aeration system 8, and a biological contact oxidation tank 9.

[0032] In the present invention, the enclosed house has a hollow structure for accommodating the sewage treatment device or treatment unit to be deodorized, as well as the fan, the conduit, the telescopic air hood, and the air volume intelligent control system; the enclosed house is in one-way gas connection with the external environment to prevent odor from overflowing.

[0033] There is no special limitation on the material of the enclosed house in the present invention, and conventional materials in the art can be used. Preferably, it is a cement material or a metal material, and the enclosed house is preferably a fan room for sewage treatment supporting facilities.

[0034] In the present invention, the odor inlet 21 of the fan is connected to the telescopic air hood through a conduit, and the air outlet 22 of the fan is connected to the aeration system.

[0035] In the present invention, the telescopic air hood has a telescopic control unit 7, and the telescopic control unit adjusts the size of the telescopic air hood opening; an odor sensing device 5 is installed at the bottom end of the telescopic air hood; the sewage treatment device or treatment unit to be deodorized is preferably a mechanical grille 6 and / or a hydrolysis acidification tank, and the telescopic air hood is located above the mechanical grille and / or the hydrolysis acidification tank.

[0036] In the present invention, the odor sensing device monitors the odor concentration in real time and dynamically adjusts the ratio of the air volume in the air intake port 23 of the fan to the odor volume in the telescopic air collection hood (the odor intake port of the fan) according to the magnitude of the odor concentration; the odor concentration is the dilution multiple when odorless air continuously dilutes the odor sample to the olfactory threshold of the olfactory panelists. When the odor concentration is 200 or higher than 200, the air-to-odor volume ratio is 8-10:1, preferably 9-10:1; when the odor concentration is between 40 and 200 (excluding 40 and 200), the air-to-odor volume ratio is preferably 5-7:1, more preferably 6-7:1; when the odor concentration is 40 or lower than 40, the air-to-odor volume ratio is preferably 1-3:1, more preferably 2-3:1, and even more preferably 3:1 to ensure the odor removal effect; a air volume intelligent control system is installed on the side of the air intake port of the fan to dynamically adjust the air-to-odor volume ratio according to the odor concentration.

[0037] In the present invention, the biological contact oxidation tank is preferably a closed treatment device or an underground treatment device.

[0038] In the present invention, the microorganisms in the biological contact oxidation tank remove the pollutants in the sewage and purify the odor through synergistic metabolism.

[0039] In the present invention, the fan is preferably a centrifugal fan or a Roots blower.

[0040] In the present invention, the aeration system preferably uses ultra-microporous aerators with a bubble diameter ≤ 1 mm.

[0041] In the present invention, the biological contact oxidation tank has suspended fillers, and the filling rate of the fillers is preferably 70-80%, more preferably 72-78%, and even more preferably 75-76%; the fillers are preferably bionic leaf vein flexible high-throughput fiber meshes, and microbial energy capsule particles are arranged inside the fillers to enhance the activity of deodorizing microorganisms.

[0042] In the present invention, the suspended fillers have a high filling rate at the bottom of the biological contact oxidation tank and a low filling rate at the top, and the filling rate gradually decreases from the bottom to the top.

[0043] In the present invention, the form of the ultra-microporous aerator is preferably a combination of vertical spiral and bottom aeration, which is convenient for the shedding of aging microorganisms and maintaining the microbial activity.

[0044] The closed house, fan, air duct, telescopic air collection hood, odor sensing device, mechanical grille, telescopic control unit, aeration system, biological contact oxidation tank, and air volume intelligent control system in the present invention are all well-known devices in the art.

[0045] The following is a detailed description of the technical solutions provided by the present invention in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0046] In the embodiment, the enclosed house has a hollow structure. The enclosed house is a fan room, which is in one-way gas connection with the external environment to prevent the odor from overflowing. The telescopic gas hood is located above the mechanical grille (or the mechanical grille and the hydrolysis acidification tank). An odor sensing device is installed at the bottom end of the telescopic gas hood. The odor inlet of the fan is connected to the telescopic gas hood through a duct. The aeration system (ultra-micro pore aerator) is connected to the air outlet of the fan. A wind volume intelligent control system is installed on the side of the air inlet of the fan to dynamically adjust the air volume ratio of air to odor according to the odor concentration, and the bubble diameter ≤ 1 mm. The aeration system is installed at the bottom of the buried biological contact oxidation tank for aerobic biodegradation. The telescopic gas hood has a telescopic control unit, which adjusts the size of the opening of the telescopic gas hood.

[0047] The biological contact oxidation tank is a hanging type filler. The filler is a bionic leaf vein flexible high-flux fiber mesh, and microbial energy capsule particles are arranged inside the filler. The form of the ultra-micro pore aerator is the combination of vertical spiral and bottom aeration.

[0048] Example 1

[0049] The process flow of the rural domestic sewage treatment device in this embodiment is mechanical grille - biological contact oxidation tank - sedimentation tank. The treatment scale is 250 t / d. A mechanical grille, a Roots blower (1 unit, power 4.5 kW), a telescopic gas hood, and a duct are installed in the fan room. The air volume ratio of the air at the air inlet of the fan to the odor at the odor inlet is 3:1. The air and odor enter the aeration system after being compressed by the fan and escape in the form of tiny bubbles in the biological contact oxidation tank. Microorganisms such as Bacillus and sulfur-oxidizing bacteria in the biological contact oxidation tank remove pollutants in the sewage and purify the odor through synergistic metabolism. The filling rate of the hanging type filler gradually decreases from the bottom to the top of the biological contact oxidation tank, and the average filling rate is 80%.

[0050] The inlet index range of the rural domestic sewage treatment device is: Chemical Oxygen Demand (COD Cr ): 80 - 300 mg / L, Biochemical Oxygen Demand (BOD5) for five days: 50 - 250 mg / L, Total Nitrogen (TN): 40 - 150 mg / L, Suspended Solids (SS): 30 - 200 mg / L.

[0051] Example 2

[0052] The process flow of the rural domestic sewage treatment device in this embodiment is mechanical grille - hydrolysis acidification tank - biological contact oxidation tank - sedimentation tank, with a treatment scale of 400 t / d. In the fan room, there are installed mechanical grille, hydrolysis acidification tank, Roots blowers (2 units, each with a power of 4.5 kW), telescopic gas hood, and air duct; the air volume ratio of the air at the air inlet of the fan to the odor at the odor inlet is 3:1. The air and odor enter the aeration system after being compressed by the fan and escape in the form of tiny bubbles in the biological contact oxidation tank. Microorganisms such as Bacillus and sulfur-oxidizing bacteria in the biological contact oxidation tank remove pollutants in the sewage and purify the odor through synergistic metabolism; the filling rate of the suspended packing gradually decreases from the bottom to the top of the biological contact oxidation tank, and the average filling rate is 75%.

[0053] The inlet index range of the rural domestic sewage treatment device in this embodiment is the same as that in Embodiment 1.

[0054] Embodiment 3

[0055] The process flow of the rural domestic sewage treatment device in this embodiment is mechanical grille - biological contact oxidation tank - sedimentation tank, with a treatment scale of 250 t / d. In the fan room, there are installed mechanical grille, Roots blower (1 unit, with a power of 4.5 kW), telescopic gas hood, and air duct; the air volume ratio of the air at the air inlet of the fan to the odor at the odor inlet is 7:1. The air and odor enter the aeration system after being compressed by the fan and escape in the form of tiny bubbles in the biological contact oxidation tank. Microorganisms such as Bacillus and sulfur-oxidizing bacteria in the biological contact oxidation tank remove pollutants in the sewage and purify the odor through synergistic metabolism; the filling rate of the suspended packing gradually decreases from the bottom to the top of the biological contact oxidation tank, and the average filling rate is 70%.

[0056] The inlet index range of the rural domestic sewage treatment device in this embodiment is the same as that in Embodiment 1.

[0057] Comparative Example 1

[0058] The process flow of the rural domestic sewage treatment device in this comparative example is mechanical grille - biological contact oxidation tank - sedimentation tank, with a treatment scale of 250 t / d. In the fan room, there are installed mechanical grille, Roots blower (1 unit, with a power of 4.5 kW), telescopic gas hood, and air duct; the air volume ratio of the air at the air inlet of the fan to the odor at the odor inlet is 1:1. The air and odor enter the aeration system after being compressed by the fan and escape in the form of tiny bubbles in the biological contact oxidation tank. Microorganisms in the biological contact oxidation tank remove pollutants in the sewage and purify the odor through synergistic metabolism.

[0059] The inlet index range of the rural domestic sewage treatment device in this comparative example is the same as that in Embodiment 1.

[0060] The deodorization effects of the rural domestic sewage treatment devices in Examples 1 to 3 and Comparative Example 1 are shown in Table 1, and the odor concentration on the 0th day is the initial odor concentration.

[0061] Table 1 Statistical table of deodorization effects of Examples 1 to 3 and Comparative Example 1

[0062]

[0063] As can be seen from Table 1, when using the rural domestic sewage treatment device of the present invention for deodorization, the odor concentration at the factory boundary is lower than 20, which can meet the odor concentration limit of the "Emission Standard of Air Pollutants for Municipal Sewage Treatment Plants" (DB11 / 2007 - 2022). The present invention adjusts the air volume ratio of odor to air through the air volume intelligent control system, sets up hanging fillers, the fillers are bionic leaf vein flexible high-flux fiber nets, and controls the filler ratio; combined with a super-micro pore aerator with a vertical spiral and bottom aeration, a telescopic air collection hood and an odor sensing device at the bottom, etc., the sewage treatment device has a good deodorization effect on rural domestic sewage.

[0064] The present invention provides a deodorization method for a rural domestic sewage treatment device with simple operation, low investment and operation costs. The present invention makes full use of the devices and auxiliary projects required for conventional sewage treatment facilities, including equipment and construction units such as fans, enclosed houses, aeration systems, biological contact oxidation tanks, etc., without adding new treatment devices, and achieves the purpose of deodorizing the sewage treatment device.

[0065] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A deodorization method for a rural domestic sewage treatment device, characterized in that, It includes the following steps: 1) Install the sewage treatment device or unit to be deodorized, telescopic gas hood, fan, air duct, and air volume intelligent control system in a closed house; 2) Compress the odor and air collected by the telescopic gas hood by the fan and then enter the aeration system, and escape in the form of tiny bubbles in the biological contact oxidation tank; The telescopic gas hood is located above the sewage treatment device or unit to be deodorized; The odor inlet of the fan is connected to the telescopic gas hood through an air duct; The aeration system is connected to the air outlet of the fan; The aeration system is installed at the bottom of the biological contact oxidation tank for aerobic biodegradation.

2. The deodorization method according to claim 1, characterized in that, The closed house has a hollow structure.

3. The deodorizing method according to claim 1 or 2, characterized in that, The telescopic gas hood has a telescopic control unit, and the telescopic control unit adjusts the size of the telescopic gas hood opening.

4. The deodorization method according to claim 3, wherein An odor sensing device is installed at the bottom end of the telescopic gas hood.

5. The deodorizing method according to claim 4, wherein The biological contact oxidation tank is a closed treatment device or an underground treatment device.

6. The deodorizing method according to claim 5, wherein The fan is a centrifugal fan or a Roots blower, and the air volume intelligent control system dynamically adjusts the air volume ratio of air to odor according to the odor concentration.

7. The deodorization method according to claim 5 or 6, characterized in that, The aeration system uses ultra-micro pore aerators, and the bubble diameter ≤ 1 mm.

8. The deodorizing method according to claim 7, characterized in that, The biological contact oxidation tank is a hanging filler, and the filling rate of the filler is 70 - 80%.

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