KR102599815B1 - Odor reduction and monitoring system of sewage pipe - Google Patents

Abstract

The present invention is a combined sewer pipe odor reduction technology and monitoring system that reduces sulfur and ammonia (Article 2 (4) of the Odor Prevention Act), which are the main causes of combined sewer pipe odor, and is a technology that can reduce and manage odor by monitoring odor factors in real time. am.
Odor removal technology includes an oxygen water supply unit placed adjacent to the conduit; A unit that generates pure oxygen and dissolves it in water; A unit that captures and senses odor factors within the conduit; Network device that transmits sensing data to a central control center; A central control unit that converts collected sensor data into odor levels and delivers commands to the field control box; It consists of an on-site control box that can execute commands from the central control center.

Description

Odor reduction and monitoring system of sewage pipe {Odor reduction and monitoring system of sewage pipe}

The present invention is intended to solve the problem of odor caused by a lack of dissolved oxygen in water bodies, and seeks to reduce the concentration of hydrogen sulfide and ammonia, which are the main causes of odor, by supplying high-concentration oxygenated water (15ppm). Malodor refers to an odor in which hydrogen sulfide, mercaptans, amines, and other irritating substances stimulate the human sense of smell and cause discomfort and disgust (Article 2 (2) of the Malodor Prevention Act). The present invention provides real-time odor measurement and odor It is about odor reduction and automated monitoring technology through operation of reduction devices according to level.

In order to respond to complaints about odor, the Ministry of Environment and each local government have been conducting odor reduction pilot projects for sewage facilities that generate odor. In order to understand the odor status, the odor problem was addressed by analyzing the correlation between causative substances and odor concentration and creating a odor map. In order to conduct a survey on sewage odor, Seongnam City measured the concentration of hydrogen sulfide in the air and created an odor map based on this. Hydrogen sulfide is the substance with the highest correlation as a result of a correlation analysis between sewer odor substances and complex odors in a pilot project to improve sewer odors in urban areas conducted by the Ministry of Environment in 2012. It is easy to measure in the field, can be measured continuously, and can be used to reduce underwater odors. Because the material can be measured, it was selected as an indicator material for sewage odor. To create an odor map, it is essential to study the correlation between sensor sensitivity and sensory values. Samples are collected according to the odor process test method at the odor measurement point, and complex odors are analyzed using an air dilution sensory method. After various pretreatments, the odor samples are analyzed for 22 types of designated odor substances using a precision analysis device and the correlation is analyzed. In addition, a method of evaluating the odor intensity of a single odor substance and the sensory evaluation of the odor substance using a gas chromatographic analysis method or an absorptiophotometer provides a correlation equation between the odor intensity using the device and the odor intensity using the human senses. You can use it to convert a sensory odor into an objective value.

In this study, samples were collected from a site designated as a test bed, the agency requested analysis, and sensory values were measured using the sensory dilution method. A regression equation was created using the output value and sensory value of the odor sensor for hydrogen sulfide, and data not used in the regression equation was substituted into the calculated regression equation to check whether the regression equation predicted correctly.

The combined sewer system receives wastewater from kitchens and bathrooms in ordinary homes, wastewater from flush toilets, wastewater from building facilities, and wastewater from private sewage treatment facilities, and rainwater containing road pollutants and various impurities flows in during rainfall. As this domestic sewage is transported to the sewage treatment plant, it decays and produces a foul odor. Domestic sewage contains large amounts of organic matter, nitrogen compounds, sulfur compounds, and phosphorus. When the temperature inside the sewer pipe rises, the nitrogen-containing organic compounds are hydrolyzed and ammonia is produced as a by-product.

In foreign countries, research is mainly conducted on the occurrence of hydrogen hydroxide, one of the odorous substances in sewage pipes. Nielsen created a rate equation for the chemical reaction of hydrogen sulfide in that hydrogen sulfide generated in the biofilm layer of sewage pipes is produced by chemical and microbial reactions, and hydrogen sulfide produced by the reduction reaction of sulfur-reducing bacteria in the pipe wall biofilm layer is calculated as the oxygen consumption rate. A prediction model for hydrogen sulfide concentration in the sewer system was proposed by presenting the relationship between sulfide supply rate and sulfide supply rate. Sharma presented a dynamic prediction model for sulfide generation that considered the hydraulic characteristics of the sewer system and the structure of the sewer system and verified its accuracy. In addition, a study was conducted to apply a diffusion model using meteorological data such as wind speed and wind direction to predict the concentration of hydrogen sulfide emissions from sewage treatment plants.

In Korea, research is mainly conducted using the levels of odorous substances after they are released from water to the atmosphere. According to research on measures to reduce septic tank odor, the main causes of sewage odor are hydrogen sulfide and mercaptan-type sulfur compounds. The odor can be felt at very low concentrations and is highly irritating. Sang-jin Park and Su-yeol Kwon measured and presented the concentrations of sulfur-based odor substances such as hydrogen sulfide, methyl mercamtan, methyl sulfide, and methyl disulfide in odor samples collected by measuring sewage pipes and field odors, and the correlation with odor intensity, which is an indicator of human olfactory sense. A comparison was presented. The adjustment date was converted into odor intensity reflecting the minimum detection concentration for 22 types of designated odor substances selected by the Ministry of Environment, and the sewage system was evaluated by investigating the amount of hydrogen sulfide generated by each odor source. The odor from sewage pipes was removed using an iron salt filter that undergoes a chemical adsorption reaction with hydrogen sulfide called rosette. Jinseong Kim examined the applicability of an electrochemical oxidation device using redox reactions with sulfur-based substances such as hydrogen sulfide and methyl mercaptan as odorous substances.

Korean Patent Publication No. 10-2021-0099984 (2021.08.13) Korean Patent Publication No. 10-2276558 (2021.07.07)

The technical problem that the present invention seeks to solve is to solve hydrogen sulfide and ammonia, which are major factors causing bad odors, by increasing dissolved oxygen in water bodies. In addition, by operating an odor monitoring system, we aim to reduce civil complaints from local residents by enabling real-time odor detection and operation of reduction devices.

The problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

According to one embodiment

Specific details of other embodiments are included in the detailed description and drawings.

According to the present invention described above, it is intended to remove hydrogen sulfide and ammonia, which are the main causes of bad odor, by increasing dissolved oxygen in the water body. Sulfur and ammonia factors can be effectively removed by supplying high-concentration oxygen water (15ppm) using the microbubble method to the input point, and real-time odor management and reduction is achieved through odor measurement and monitoring devices through odor collection devices and sensing equipment. I want to achieve it.

Effects according to the embodiments are not limited to the contents exemplified above, and further various effects are included in the present specification.

Figure 1 is a schematic diagram showing the removal of ammonia by oxygen from dissolved oxygen.
Figure 2 is a diagram showing the oxygen generating dissolution unit according to the present invention.
Figure 3 is a block diagram of an odor reduction and monitoring system for a combined sewer pipe according to the present invention.
Figure 4 is a block diagram of an odor reduction and monitoring system for a combined sewer pipe according to the present invention.
Figures 5 and 6 are diagrams for explaining the odor reduction and monitoring system for combined sewer pipes according to the present invention.
Figures 7 and 8 are diagrams showing the odor reduction and monitoring system for combined sewer pipes according to the present invention.

The present invention will be described in more detail below.

- Pure oxygen generation and oxygen water dissolution device

Oxygen pressure dissolution formula

* Temperature: 25

* 1L of oxygen: 33ml/L (33g/L=33,000mg/l)

* Solubility: 33,000mg/l/kg (atmospheric pressure)

* Solubility: 33,000mg/l x 2kg = 66,000mg/l

* Solubility: 33,000mg/l x 5kg = 165,000mg/l

Example) Flow rate: 100m3/hr x 1L/5kg

Solubility 165,000mg/l / 100,000l (100m3/hr flow rate)

Oxygen amount 1.65mg/l/O2 x 5L = 8.25mg/l increase

The terms used herein are used to describe specific embodiments and are not intended to limit the invention. As used herein, the singular forms include the plural forms unless the context clearly indicates otherwise. Additionally, when used herein, “comprise” and/or “comprising” means specifying the presence of stated features, numbers, steps, operations, members, elements and/or groups thereof. and does not exclude the presence or addition of one or more other shapes, numbers, operations, members, elements and/or groups.

Sewage odor is caused by increased nitrogen, phosphorus, and nutrients from domestic sewage and industrial wastewater. When dissolved oxygen is supplied, the dissolved oxygen concentration in the sewer pipe increases, activating aerobic bacteria and improving the purification speed of wastewater, removing various organic substances. By decomposing, the odor can be reduced. Therefore, in order to reduce sewage pipe odor, an activated sludge method that supplies oxygen to sewage is used during the sewage treatment process. Activated sludge supply is a mechanism in which aerobic microorganisms multiply by supplying oxygen to sewage, and these aerobic microorganisms attach to fine particles in the sewage to create activated sludge floc. The resulting floc is a mechanism by which organic matter is decomposed by microorganisms and water is purified. The pure oxygen activated sludge method is an activated sludge method that supplies oxygen directly to the aeration tank instead of air. The partial pressure of oxygen is about 5 times higher than that of the existing activated sludge method, keeping the dissolved oxygen in the aeration tank high. Choi Mi-jeong and Park Seong-hyuk installed a pure oxygen active dissolution system targeting Goejeong Stream and discharged oxygen water that increased the dissolved oxygen concentration to over 20 mg/L at 1㎥/min. As a result, complex odor was reduced by 70% and odor intensity sensory method was used. It was verified that the odor intensity was reduced by 82% by adding dissolved oxygen.

The supplied oxygen is produced through the PSA process. The PSA method uses the selective absorption power of an adsorbent to separate nitrogen and oxygen components in the air and produces high-concentration oxygen gas through the processes of adsorption, equalization, and desorption. Seong-Jeong Seo investigated the effect on productivity by changing operation variables such as joining step time, adsorption step time, and pressure equalization time in the oxygen-enriched PSA process, found the optimal operating conditions at each oxygen concentration, and performed a strongly adsorbate cleaning step in the high purity region. By introducing it, both oxygen and nitrogen were produced with a purity of over 90%.

In the process of supplying oxygen to wastewater, microbubbles with a diameter of less than 50㎛ were used. Macrobubbles rise at a speed of 5-6 m per minute and burst from the surface of the water, but microbubbles rise at a slow speed of 1-3 mm per minute, contract, and dissolve in water, making them more efficient than existing bubbles due to their higher transfer rate. chu used ozone microbubbles for wastewater treatment, and the use of ozone microbubbles for textile wastewater increased the chemical oxygen demand removal rate by more than 20% compared to macrobubbles. Kerfoot and McGrath conducted a study on removing groundwater residues with ozone microbubbles, and 71% of MTBE was removed. Microbubbles' small bubble size, large surface area, long residence time, slow rising speed, and high internal pressure provide sufficient reaction time to purify water, showing high efficiency when used with wastewater and water treatment technology.

Therefore, we created an odor reduction system that reduces odor by producing high-purity oxygen water using the PSA method and supplying oxygen through oxygen dissolution to sewage pipes to be applied as microbubbles. By supplying pure oxygen, bad odor can be reduced by promoting the decomposition of organic matter by microorganisms, and at the same time, bad odor can be reduced by directly introducing microorganisms. EM microorganisms are useful microorganisms and are defined as EM when the standard types of photosynthetic bacteria, lactic acid bacteria, and yeast coexist at the same time. Photosynthetic bacteria require low-level fatty acids or hydrogen sulfide as electron donors, so they supply nutrients themselves with sunlight. They have high organic matter decomposition ability and odor removal efficiency, so they can be used in the treatment of organic wastewater, pig manure wastewater, and food waste. Ohana found an industrial way to use the antioxidants contained in EM and derived the optimal conditions for sulfide removal. Hongjae Choi investigated the effect of reducing odor from food waste using EM, and Hyeonok Song found optimal co-culture conditions for cultivating high-concentration EM and investigated the resulting water quality treatment effect. By manufacturing soil balls cultured with EM microorganisms that are effective in removing odors and determining the shape and amount of soil balls according to the odor generation situation in the sewer pipe, it is possible to respond to odor taking into account the water flow, topography, and odor generation situation of the sewer pipe.

Referring to Figures 1 to 8, the odor reduction and monitoring system for a combined sewer pipe according to this embodiment includes an oxygen water supply unit disposed adjacent to the combined sewer pipe and generated from an oxygen generation and dissolution unit; An oxygen generation and dissolution unit that generates pure oxygen and dissolves it in water; A collection and sensing unit that collects and senses odor factors in the combined sewer pipe; A network device that transmits the sensing data of the odor factor to a central control unit; The central control unit converts the sensor data collected by the network device into an odor level and transmits a command to an on-site control box; And it may include a field control box capable of executing the command from the central control unit.

The oxygen water supply unit can increase the amount of dissolved oxygen in the water body in the combined sewer pipe by directly supplying 15 ppm high concentration oxygen water in which pure oxygen generated from the oxygen generation and dissolution unit is dissolved to the target point of the combined sewer pipe.

The oxygen generating and dissolving unit may apply a microbubble method that can dissolve high concentration oxygen of 15 ppm or more in water, thereby increasing the remaining time of oxygen in the water body of the combined sewer pipe to 2 hours or more.

The collection and sensing unit collects odor from the odor generating area of the combined sewer pipe to the top through a motor that can generate air flow through a motor, and may further include a measuring device capable of sensing hydrogen sulfide and ammonia in the odor. You can.

The central control unit calculates the odor level according to the hydrogen sulfide and ammonia concentration using the sensory value analysis and the correlation analysis result between the sensing sensitivities that have already been analyzed from the sensor data, and transmits the calculated odor level to the field control box. Provided, the odor level is classified from Lv1 to Lv5, and when it is Lv3 or higher, the field control box can provide an operation command to the oxygen generating dissolution unit.

The field control box can perform real-time odor monitoring and odor reduction by operating the collection and sensing unit and the oxygen generation and dissolution unit.

Here, the microbubble (MB: Micro-Bubble) method refers to bubbles that are much smaller than regular bubbles. It is a method using microbubbles with a bubble diameter of 50㎛ or less. Compared to general aeration methods, the dissolution efficiency of oxygen is higher, and the charging effect and physical It has characteristics such as adsorption effect. Research on applying this technology to sewage treatment centers or waste treatment in Japan is actively underway.

Figure 1 shows that ammonia, which is an organic substance that causes bad odor, is removed by the oxygen water supplied through the oxygen water supply unit generated from the oxygen generation and dissolution unit.

To explain in more detail, organic matter consists of protein, hydrocarbon, and ash. Proteins, hydrocarbons, and ash are transformed into amino acids, CO2, H20, Sugars, and Modified Ash, respectively, by oxygen (O2). Among these, amino acids are transformed into carbon dioxide (CO2), hydroxyl group (R-OH), and ammonium (NH4) through ammonium reaction. Transformed ammonium (NH4) becomes nitrogen dioxide (NO2-) through nitrification, then reacts with oxygen (O2) to become nitrogen trioxide (NO3-), and then becomes nitrogen through denitrification. (N2) and nitrogen dioxide (NO2) are produced. As a result, ammonium (NH4), which causes bad odor, is removed.

Figure 2 shows the oxygen generating dissolution unit according to the present invention in detail.

Referring to FIG. 2, the oxygen generating dissolution unit includes a supply unit (supply), an injector, an oxygen generator, an oxygen flow SW, a pressure pump, a check valve, a mixer tank, a gate valve, a flow meter, an injector, a microbial tank, and an outlet.

In more detail, when Lv3 or higher, the field control box provides an operation command to the oxygen generation and dissolution unit, and the oxygen generation and dissolution unit generates oxygen through the configurations shown in FIG. 2 according to the provided operation command. That is, when water containing organic matter is supplied through the supply unit, oxygen is injected from the oxygen generator into the water containing the organic matter through an injector by controlling the oxygen flow rate SW. Oxygen may be provided to water at a high concentration. For example, oxygen may be provided in a range where 15 ppm of high-concentration oxygen water is dissolved in water. The oxygen wandering SW may be a component that receives the operation command.

Water containing oxygen and organic matter is then provided to a pressure pump. As shown in FIG. 2, the pressure pump includes a display unit indicating the pump status. The display unit can display whether the pump is in a normal state, that is, the pump is normal, idling, and overloaded. The display unit can be controlled by a central control unit through a network device. According to the present invention, it is possible to identify whether the pump is in a normal state, that is, the pump is normal, idling, and overloaded, through the display unit in real time.

The pressure pump can provide pressure to provide water containing oxygen and organic matter to an outlet to be described later. Next, the water containing oxygen and organic matter that has passed through the pressure pump is measured and changed by a check valve. In other words, the water from the combined sewer pipe is then purified and supplied to the sea or river, and the water temperature must be within a certain error range from the temperature of the sea or river to which it is supplied, thereby significantly changing the habitat environment of animals and plants living in the sea or river. Because they don't do it. That is, the water temperature containing oxygen and organic matter that has passed through the pressure pump is measured by a check valve, and the water temperature is changed so that the measured water temperature is within the above error range. The water temperature can be set to be maintained in the range of 20.5 degrees.

Subsequently, the water whose temperature has been changed is provided to the mixer tank. The mixer tank can provide a predetermined pressure to the water so that oxygen in the water dissolves well in the water. The pressure may be, for example, 3.0 kg/cm2, but is not limited thereto. Subsequently, the water that has passed through the mixer tank can be supplied to the outlet through a gate valve and flow meter. In the process of supplying to the outlet, microorganisms that decompose organic matter are supplied to the water containing oxygen and organic matter by a microbial tank. Additional heaters can be placed around the microbial tank to increase the population and density of microorganisms.

The oxygen generation and dissolution unit according to the present invention can be applied to the microbubble method, which can dissolve high concentration oxygen of 15 ppm or more in water and increase the remaining time of oxygen in the water body of the combined sewer pipe to 2 hours or more.

The microbubble (MB: Micro-Bubble) method refers to bubbles that are much smaller than regular bubbles. It is a method using microbubbles with a bubble diameter of 50㎛ or less. Compared to general aeration methods, the dissolution efficiency of oxygen is higher, and the effect of electrification and physical adsorption is high. It has characteristics such as:

Next, referring to Figures 3 and 4, the collection and sensing unit collects and senses odor factors (H2S, NH3) in the combined sewer pipe. Subsequently, the network device transmits the sensing data of the odor factor to the central control unit (Database Center). The central control unit may convert the sensor data collected by the network device into an odor level.

The network device that transmits sensing data to the central control center is equipment that transmits data that can check odor levels such as hydrogen sulfide and ammonia measurement data, measurement time, temperature, etc. It uses 100mbps LAN and connects to the sensor equipment via USB. are connected through

The equations for converting the sensor data into odor levels are as follows. The equations for converting the sensor data into odor levels were calculated through the correlation analysis results between previously analyzed sensory values and sensing sensitivities.

[Equation 1]

H2S odor level = ln[(measured value-0.2)/0.02604] * 0.39206

[Equation 2]

NH3 odor level = ln[(measured value+50)/36.95896]*0.71545

[Equation 3]

if H2S odor level > 1.5 = 1, else = 0 (where 1 is the device operating, 0 is not operating)

[Equation 4]

if NH3 odor > 1.5 = 1, else = 0 (where 1 means the device is operating, 0 is not operating)

The odor level can be classified (or graded) from Lv1 to Lv5 according to the odor level of H2S and NH3 calculated by [Equation 1] to [Equation 4]. That is, if at least one of the odor levels of H2S and NH3 is greater than 1.5, Lv3 or higher (including Lv3, Lv2, and Lv1) can be recorded.

Data on the odor level and classified Lv1 to Lv5 according to the odor level of H2S and NH3 calculated by [Equation 1] to [Equation 4] are provided in the field control box.

If the odor level of either sulfur or ammonia is 1.5 or higher (i.e., the odor level is Lv3 or higher), the device will operate. Here, the operation of the device means that if the odor level of either sulfur or ammonia is 1.5 or higher, the central control unit provides an operation command to the field control box, and the field control box operates the oxygen generation and dissolution unit (Odor Removal System in Figure 3). It means making it work.

Figures 5 and 6 are diagrams showing the creation of a testbed odor map based on the odor level data of sulfur and ammonia stored by the central control unit. In more detail, the odor level can be calculated and stored for each area of the combined sewer pipe by the central control unit. The central control unit can generate a testbed odor map based on stored odor levels for each area of the combined sewer pipe. As a result, it is possible to better identify different odor levels in each area of a combined sewer pipe and selectively remove odors in areas of sewer pipes of Lv3 or higher.

Figures 7 and 8 are diagrams showing in more detail the odor reduction and monitoring system of the combined sewer pipe according to this embodiment. Referring to FIGS. 7 and 8, the collection and sensing unit (including the sewer gas suction hose, gas inhaler (blower), and odor collection box (built-in sensor) of FIG. 7) includes a suction hose and a gas inhaler ( broiler, operated by a motor). The motor can collect odors located in many areas from the lower part to the upper part of the odor generating area by generating air flow through the motor in the odor generating area of the combined sewer pipe. The odor collection box (with built-in sensor) of the collection and sensing unit refers to a measuring device, and can sense hydrogen sulfide and ammonia in the odor. The odor level of the sensed hydrogen sulfide and ammonia is calculated through the process described above. Based on the odor level of H2S and NH3 calculated by the above-mentioned [Equation 1] to [Equation 4] and data on Lv1 to Lv5 classified, the central control unit provides an operation command to the field control box. In addition, the field control box (gas purification filter unit in FIG. 7) that receives the operation command operates the oxygen generation and dissolution unit to purify water with odor above a certain level. The oxygen generation dissolution unit and collection sensing unit of the combined sewer pipe odor reduction and monitoring system according to this embodiment can be electrically connected to a solar power generation module located around the sewer pipe to receive power.

The present invention described above has been described with reference to an embodiment shown in the drawings, but this is merely illustrative, and various modifications and other equivalent embodiments can be made by those skilled in the art. should be clarified. Therefore, the true technical protection scope of the present invention should be interpreted in accordance with the attached claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims (6)

An oxygen water supply unit disposed adjacent to a combined sewer pipe and generated from an oxygen generation dissolution unit;
An oxygen generation and dissolution unit that generates pure oxygen and dissolves it in water;
A collection and sensing unit that collects and senses odor factors in the combined sewer pipe;
A network device that transmits the sensing data of the odor factor to a central control unit;
The central control unit converts the sensing data collected by the network device into an odor level and transmits a command to an on-site control box; and
Comprising a field control box capable of executing the commands from the central control unit,
The oxygen water supply unit supplies high concentration oxygen water of 15 ppm or more in which pure oxygen generated from the oxygen generation and dissolution unit is dissolved directly to the target point of the combined sewer pipe, thereby increasing the amount of dissolved oxygen in the water body in the combined sewer pipe,
The oxygen generating dissolution unit,
Applying a microbubble method that can increase the remaining time of oxygen in the water body of the combined sewer pipe to 2 hours or more by dissolving high concentration oxygen of 15ppm or more in water,
The collection and sensing unit collects odor from the odor generating area of the combined sewer pipe to the top through a motor that can generate air flow through a motor, and further includes a measuring device capable of sensing hydrogen sulfide and ammonia in the odor. ,
The central control unit calculates the odor level according to the concentration of hydrogen sulfide and ammonia by using the sensory value analysis and the correlation analysis result between the sensing sensitivities that have already analyzed the sensing data, and transmits the calculated odor level to the field control box. Provided, the odor level is classified from Lv1 to Lv5, and when it is Lv3 or higher, the field control box provides an operation command to the oxygen generating dissolution unit,
The field control box operates the collection and sensing unit and the oxygen generation and dissolution unit to perform real-time odor monitoring and odor reduction,
The microbubble method is a method using microbubbles with a bubble diameter of 50㎛ or less,
Organic ammonia, which causes bad odor, is removed by the oxygen generated from the oxygen generation and dissolution unit,
The organic matter consists of protein, hydrocarbons, and ash,
The protein, the hydrocarbon, and the ash are transformed into amino acids, CO2, H20, sugars, and modified ash, respectively, by the oxygen, and the amino acids are converted into carbon dioxide (CO2) and hydroxyl group (R-OH) by ammonium reaction. , and ammonium (NH4), and the transformed ammonium (NH4) becomes nitrogen dioxide (NO2-) through nitrification, and then reacts with the oxygen to be transformed into nitrogen trioxide (NO3-), and again. Denitrification produces nitrogen (N2) and nitrogen dioxide (NO2), removing ammonium (NH4) that causes bad odors.
The oxygen generating dissolution unit includes a supply unit, an injector, an oxygen generator, an oxygen flow SW, a pressure pump, a check valve, a mixer tank, a gate valve, a flow meter, an injector, a microbial tank, and an outlet,
When water containing the organic matter is supplied through the supply unit, the oxygen is injected from the oxygen generator into the water containing the organic matter through the injector by controlling the oxygen flow rate SW,
The oxygen wandering SW may be a component that receives the operation command.
The water containing the oxygen and the organic matter is then provided to a pressure pump,
The pressure pump includes a display unit indicating the status of the pressure pump,
The display unit displays normal, idle, and overload states of the pressure pump,
The pressure pump provides pressure to provide the provided oxygen and the water containing the organic matter to the outlet,
The water temperature containing the oxygen and the organic matter that has passed through the pressure pump is measured and changed by a check valve, and the water temperature is set to be maintained in the range of 20.5 degrees,
The water whose temperature has been changed is provided to a mixer tank, and the mixer tank provides a predetermined pressure to the water so that the oxygen in the water is well dissolved in the water, and the pressure is 3.0 kg/cm2,
Water passing through the mixer tank is supplied to the outlet through the gate valve and the flow meter,
In the process of supplying to the outlet, microorganisms that decompose the organic matter are supplied to the water containing the oxygen and the organic matter by the microbial tank, and a heater is further disposed around the microbial tank to increase the number of microorganisms, increase object density,
The equation for converting the sensing data of the central control unit into the odor level is as follows,
[Equation 1]
Hydrogen sulfide odor level = ln[(measured value-0.2)/0.02604] * 0.39206
[Equation 2]
Ammonia odor = ln[(measured value+50)/36.95896]*0.71545
[Equation 3]
if hydrogen sulfide odor level > 1.5 = 1, else = 0 (where 1 is device operation, 0 is not operation)
[Equation 4]
if ammonia odor > 1.5 = 1, else = 0 (where 1 means the device is working, 0 is not working)
The odor level is classified into Lv1 to Lv5 according to the odor level of the hydrogen sulfide and the ammonia calculated by [Equation 1] to the [Equation 4], and at least one of the odor level of the hydrogen sulfide and the ammonia If is greater than 1.5, Lv3 or higher (including Lv3, Lv2, Lv1) is recorded,
The odor level is calculated and stored for each area of the combined sewer pipe by the central control unit,
A combined sewer pipe odor reduction and monitoring system in which the central control unit generates a test bed odor map based on the stored odor levels for each area of the combined sewer pipe. delete delete delete delete delete