JP6334959B2 - Biological deodorization apparatus and biological deodorization method - Google Patents

Description

  Embodiments described herein relate generally to a biological deodorization apparatus and a biological deodorization method.

  In facilities that generate odors such as sewage treatment plants, exhaust gas deodorization is performed as a countermeasure against odors. Since the environmental load is low and the cost is low as a deodorization treatment technique, a packed tower type biological deodorization method is adopted. This deodorization method is a technique in which microorganisms are held at a high density on a carrier packed in a packed bed in a packed tower, and odorous substances are oxidatively decomposed by the microorganisms to eliminate bromide. This deodorization method has a problem that it takes a long time to recover the processing capacity when the apparatus is restarted after the apparatus is stopped. In addition, when the concentration of odorous substances increases and the processing capacity is insufficient, there is a problem that the processing capacity (deodorizing capacity) of microorganisms cannot be immediately increased.

JP 2012-255155 A

  The problem to be solved by the present invention is to provide a biological deodorizing apparatus and a biological deodorizing method capable of enhancing the deodorizing ability in a short time.

The biological deodorization apparatus according to the embodiment includes a biological reaction tower, a packed bed, a microorganism storage tank, a microorganism supply mechanism, a detection unit, and a control unit. A gas containing an odor component is introduced into the biological reaction tower. The biological reaction tower is provided with a gas discharge unit that discharges the gas treated with the odor component. The packed bed is provided inside the biological reaction tower. The packed bed has a carrier on which microorganisms are held. The microorganism storage tank is provided inside the biological reaction tower. The microorganism storage tank stores water containing microorganisms below the packed bed. Further, the microorganism storage tank has a microorganism concentrating part for concentrating microorganisms. The microorganism supply mechanism can supply microorganisms extracted from the microorganism concentration unit to the packed bed. A detection part detects the lack of the processing capacity of the odor component in a biological reaction tower. The detection unit is an odor component concentration detector that detects the concentration of the odor component contained in the gas passing through the gas discharge unit. The control unit issues a command to cause the microorganism supply mechanism to withdraw the microorganisms from the microorganism storage tank and supply them to the packed bed when the detection unit detects that the processing capacity of the odor component is insufficient. A fan is provided in the gas discharge unit. The fan forms a flow path for discharging gas. The control unit is connected to the microorganism supply mechanism, the detection unit, and the fan. The control unit controls operations of the microorganism supply mechanism, the detection unit, and the fan. The control unit monitors whether the microorganism supply mechanism, the detection unit, and the fan are operating normally. The control unit issues a warning when the abnormality is detected in the microorganism supply mechanism, the detection unit, and the fan, and stops the operation of the microorganism supply mechanism, the detection unit, and the fan. The control unit issues a command to cause the microorganism supply mechanism to withdraw the microorganisms from the microorganism storage tank and supply the microorganisms to the packed bed during re-operation.

The figure which shows the whole structure of the biological deodorizing apparatus of 1st Embodiment. The figure which shows the whole structure of the biological deodorizing apparatus of 2nd Embodiment. The figure which shows the whole structure of the biological deodorizing apparatus of 3rd Embodiment.

  Hereinafter, a biological deodorizing apparatus and a biological deodorizing method of an embodiment will be described with reference to the drawings.

(First embodiment)
The whole structure of the biological deodorizing apparatus 1 of 1st Embodiment is shown in FIG. The biological deodorization apparatus 1 includes a biological reaction tower 2, a microorganism supply mechanism 8 connected to the biological reaction tower 2, a gas introduction pipe 3 (gas introduction section), a gas discharge pipe 4 (gas discharge section), pH The adjusting unit 5, the watering unit 6, and the control unit 9 are included.
Inside the biological reaction tower 2, a packed bed 10 filled with a carrier 11 is disposed. In addition, a microorganism storage tank 15 is disposed below the packed bed 10 inside the biological reaction tower 2.

The carrier 11 filled in the packed bed 10 is attached with microorganisms capable of oxidizing and decomposing odor components contained in the gas introduced into the biological reaction tower 2.
As microorganisms to be attached to the carrier 11, those that can be decomposed with respect to the target odor component can be selected and attached in advance. Alternatively, the packed bed 10 may be immersed in activated sludge inhabited by various microorganisms to allow various microorganisms to adhere. In this case, the operation of the biological deodorization apparatus 1 increases the number of microorganisms that decompose the target odor component, and the microorganisms gradually become dominant inside the packed bed 10.

  A gas introduction pipe 3 is connected to the side of the biological reaction tower 2 and below the packed bed 10. A gas exhaust pipe 4 is provided at the top of the biological reaction tower 2 and above the packed bed 10. In the path of the gas exhaust pipe 4, an odor component concentration detector 4b (detector) and a fan 4a are provided.

The gas introduction pipe 3 is connected to a sewage treatment facility or the like, and a gas containing an odor component is introduced. This gas contains, for example, odorous components such as sulfur compounds, nitrogen compounds, fatty acid compounds, toluene, and xylene.
By operating the fan 4 a provided in the gas discharge pipe 4, the inside of the biological reaction tower 2 becomes negative pressure, and the flow path of the gas from the gas introduction pipe 3 to the gas discharge pipe 4 through the biological reaction tower 2 is established. It is formed. The gas introduced from the gas introduction pipe 3 passes through the packed bed 10 inside the biological reaction tower 2. In the process of passing through the packed bed 10, odor components contained in the gas are oxidatively decomposed by microorganisms.
The positional relationship between the gas introduction pipe 3 and the gas discharge pipe 4 is not limited to the form shown in FIG. 1 as long as the gas passes through the packed bed 10 in the gas flow path. For example, the gas introduction pipe 3 may be connected to the top of the biological reaction tower 2, and the gas discharge pipe 4 may be connected to the side of the biological reaction tower 2 and below the packed bed 10.

  The odor component concentration detector 4 b provided in the gas discharge pipe 4 is configured to be able to detect the concentration of the odor component contained in the gas passing through the gas discharge pipe 4. From the detection result by the odor component concentration detector 4b, it can be continuously measured whether the odor component in the gas is sufficiently oxidized. That is, the odor component concentration detector 4b can detect the deodorizing ability of the biological reaction tower 2.

In addition to the odor component concentration detector 4b provided in the gas discharge pipe 4, a separate odor component concentration detector may be provided in the gas introduction pipe 3 to detect the concentration before and after introduction into the biological reaction tower 2. In this case, the processing performance (deodorizing ability) of the biological reaction tower 2 can be accurately measured by taking the difference between the detection results.
The location and measurement method of the odor component concentration detector 4b are not limited as long as the odor component concentration detector 4b is a detection unit that detects a lack of deodorizing ability in the biological reaction tower 2.

A microorganism storage tank 15 disposed below the packed bed 10 inside the biological reaction tower 2 is filled with water 16, and microorganisms dropped from the packed bed 10 are stored in this water. In addition, the microorganisms of the packed bed 10 naturally fall with the growth or fall due to watering by the watering part 6.
Moreover, the microorganism storage tank 15 has the microorganism storage part 13 in which the water 16 containing a microorganism is stored, and the microorganism concentration part 14 which concentrates a microorganism below it. A narrowed portion 15 a having a shape narrowed downward is formed at the bottom of the microorganism storage tank 15. The microorganism concentrating part 14 is formed in the constricted part 15 a, and the microorganisms dropped from the packed bed 10 are submerged in the inside of the microorganism storage tank 15 and concentrated in the microorganism concentrating part 14.

  The watering part 6 includes a watering pipe 6a, a watering pump 6b, and a watering shower nozzle 6c. The sprinkling pipe 6 a extends from the microorganism storage section 13 of the microorganism storage tank 15 to the upper side of the packed bed 10 via the outside of the biological reaction tower 2. The watering pump 6b is provided in the path of the watering pipe 6a, and can flow the water 16 from the lower side to the upper side of the watering pipe 6a. The watering shower nozzle 6 c is provided in the watering pipe 6 a extending above the packed bed 10, and is configured to spray water over the entire packed bed 10.

The water sprinkling part 6 can draw water 16 from the microorganism storage part 13 by the watering pump 6b and sprinkle the packed bed 10 through the watering pipe 6a and the watering shower nozzle 6c. Watering the packed bed 10 may be performed continuously or intermittently by continuously operating the watering pump 6b.
Oxygen and moisture are required for oxidative decomposition of odorous substances by microorganisms. Oxygen is contained in the gas introduced from the gas introduction pipe 3. Further, moisture is supplied to the microorganisms by watering the packed bed 10 by the water spraying unit 6.

  As the growth of microorganisms in the packed bed 10 progresses, the gaps between the carriers 11 are filled with microorganisms, and the packed bed 10 is clogged. When the packed bed 10 is clogged, it becomes difficult for the gas containing the odor component to flow into the biological reaction tower 2. Watering by the watering part 6 also plays a role of suppressing clogging of the packed bed 10. That is, by sprinkling the water sprinkling unit 6, some of the microorganisms that have adhered to the carrier 11 and have grown can be washed away from the carrier 11 and dropped into the microorganism storage tank 15 set below the packed bed 10.

The microorganism storage tank 15 is provided with a pH meter 7.
The microorganism storage tank 15 is provided with a pH adjusting unit 5 connected to the biological reaction tower 2 from the outside. The pH adjusting unit 5 is provided in the path of the pH adjusting agent tank 5c in which the pH adjusting agent is stored, the pH adjusting pipe 5a extending from the pH adjusting agent tank 5c to the microorganism storing tank 15, and the pH adjusting pipe 5a. PH adjustment pump 5b.

Microorganisms that degrade odorous components may produce acidic or alkaline substances as a by-product of the degradation process. When an acidic or alkaline substance is generated, the water 16 becomes acidic or alkaline, and there is a possibility that the growth of microorganisms is hindered. As an example, when a sulfur-based odor component is included in the gas, sulfuric acid is generated as a by-product of the decomposition process of the microorganisms in the packed bed 10, and the growth of the microorganisms is hindered. Therefore, it is preferable that the pH of the water 16 sprayed in the packed bed 10 is in a neutral range.
The pH adjusting unit 5 can adjust the pH of the microorganism storage tank 15 by introducing a pH adjusting agent into the microorganism storage tank 15 based on the measurement result of the pH meter 7. By adjusting the pH of the microorganism storage tank 15 by the pH adjusting unit 5, the pH of the microorganism storage tank 15 sprinkled by the sprinkling unit 6 can be set to a neutral range, and the uneven pH of the packed bed 10 can be suppressed.

The microorganism storage tank 15 stores microorganisms that have fallen from the packed bed 10. The activity of the microorganisms stored in the microorganism storage tank 15 can be maintained by setting the pH of the microorganism storage tank 15 to a neutral range.
In addition, corrosion of the enclosure of the biological reaction tower 2 can be suppressed by setting the water 16 of the microorganism storage tank 15 to a neutral region.

  In addition, when it is known in advance that the produced by-product is acidic depending on the target odor component, a measurement meter that measures alkalinity may be arranged instead of the pH measurement meter 7 that measures pH. . In addition, an alkaline agent such as NaOH can be stored in the pH adjuster tank 5c.

In the microorganism storage tank 15, a supply pipe 8 a of the microorganism supply mechanism 8 is connected to a microorganism concentration unit 14 that concentrates microorganisms that have fallen from the packed bed 10.
The microorganism supply mechanism 8 includes a supply pipe 8a, a supply pump 8b, and a supply shower nozzle 8c. The supply pipe 8 a is extended from the microorganism concentration part 14 of the microorganism storage tank 15 to the upper part of the packed bed 10 via the outside of the biological reaction tower 2. The microorganism concentrating part 14 is formed in a narrowed part 15a at the bottom of the microorganism storage tank 15, and the supply pipe 8a is connected to the lowermost end of the constricted part 15a. The supply pump 8b is provided in the path of the supply pipe 8a, and can flow water containing concentrated microorganisms from below to the upper side of the supply pipe 8a. The supply shower nozzle 8 c is provided in a supply pipe 8 a extending above the packed bed 10 and can spray concentrated microorganisms on the entire packed bed 10.

  The microorganism supply mechanism 8 can extract microorganisms concentrated from the microorganism concentration unit 14 by the supply pump 8b and supply the microorganisms to the packed bed 10 through the supply pipe 8a and the supply shower nozzle 8c.

The controller 9 is connected to the fan 4a, the odor component concentration detector 4b, the pH adjustment pump 5b, the pH meter 7, the watering pump 6b, and the supply pump 8b.
The control unit 9 can control the operations of the fan 4a, the pH adjustment pump 5b, the watering pump 6b, and the supply pump 8b having the operation unit. Moreover, it can be monitored whether these operation | movement parts operate | move normally.

Further, the control unit 9 can operate the pH adjusting pump 5 b based on the measurement result of the pH measuring meter 7 to introduce the pH adjusting agent from the pH adjusting agent tank 5 c into the microorganism storage tank 15.
Moreover, the control part 9 can judge the fall of the processing capacity of the biological deodorizing apparatus 1 from the detection result by the odor component concentration detector 4b. In addition, the control unit 9 can operate the supply pump 8b when determining that the processing capacity of the biological deodorizing apparatus 1 is insufficient.

Next, a method for decomposing odor gas by the biological deodorizing apparatus 1 according to the first embodiment will be described.
A gas containing an odor component is introduced into the biological reaction tower 2 from the gas introduction pipe 3 by the action of the fan 4 a provided in the piping path of the gas discharge pipe 4. This gas passes through the packed bed 10 and is discharged from the gas discharge pipe 4 to the outside of the biological reaction tower 2. In the process of the gas passing through the packed bed 10, odor components are decomposed and removed by the action of microorganisms attached to the carrier 11 packed in the packed bed 10.
The odor component concentration detector 4 b provided in the gas discharge pipe 4 detects the concentration in the gas passing through the gas discharge pipe 4.

When the concentration of the odor component contained in the gas introduced from the gas introduction pipe 3 into the biological reaction tower 2 is increased, the deodorizing ability of the biological reaction tower 2 may be insufficient. That is, the amount of microorganisms in the packed bed 10 may be insufficient with respect to the concentration of the odorous component introduced. In this case, the concentration of the odor component in the gas passing through the gas discharge pipe 4 becomes high, and the odor component concentration detector 4b can detect it. The control unit 9 operates the supply pump 8b based on the detection result by the odor component concentration detector 4b provided in the gas discharge pipe 4.
When the supply pump 8b operates, the microorganisms concentrated in the microorganism concentration unit 14 pass through the supply pipe 8a and are supplied to the packed bed 10 through the supply shower nozzle 8c. Thereby, the quantity of the microorganisms of the packed bed 10 can be increased, and the deodorizing capability of the biological reaction tower 2 can be improved.

The microorganisms attached to the carrier 11 of the packed bed 10 grow by decomposing odor components. The packed bed 10 is supplied with water 16 continuously or intermittently by the water sprinkling unit 6, thereby preventing some of the microorganisms from dropping into the microorganism storage tank 15 and blocking the packed bed 10.
However, when the growth of microorganisms is rapid, the microorganisms cover and close the gaps between the carriers 11 of the packed bed 10. In such a case, it is necessary to clean the packed bed 10 by an operator's manual work. The packed bed 10 after washing is in a state where the amount of microorganisms is extremely small. Therefore, when restarting the operation of the biological deodorization apparatus 1 after cleaning, the supply pump 8 b is operated to supply microorganisms to the packed bed 10. Thereby, the deodorizing capability of the biological reaction tower 2 after washing can be immediately increased.
Note that the supply of microorganisms to the packed bed 10 after resumption of operation can be automatically performed by the controller 9 issuing a command to the microorganism supply mechanism 8 during re-operation.

In the biological deodorization apparatus 1, the control unit 9 monitors whether the fan 4 a, the pH adjustment pump 5 b, the watering pump 6 b, and the supply pump 8 b having the operation unit are operating normally. When these stop due to some abnormality, a warning is issued by the control unit 9 and the operation of the biological deodorizing apparatus 1 is stopped.
The operator identifies the cause of the shutdown and repairs or replaces the target mechanism. During this time, since the biological deodorization apparatus 1 is not in operation, the activity of microorganisms in the packed bed 10 is stopped, and the microorganisms in the packed bed may be significantly reduced or the activity may be reduced. Therefore, when restarting the operation, the supply pump 8 b is operated to supply microorganisms to the packed bed 10. Thereby, the deodorizing capability of the biological reaction tower 2 after resuming operation can be immediately increased.
Note that the supply of microorganisms to the packed bed 10 after resumption of operation can be automatically performed by the controller 9 issuing a command to the microorganism supply mechanism 8 during re-operation.

  As a modified example of the biological deodorization apparatus 1 of the first embodiment, there is a case where the gas discharge pipe 4 is not provided with the odor component concentration detector 4b. When the odor component concentration detector 4b is not provided, the processing capacity of the biological deodorizing apparatus 1 is not constantly monitored. In such a case, the gas discharged from the gas discharge pipe 4 is sampled and the odor component concentration is measured during periodic inspection of the apparatus. From this measurement result, when it is determined that the processing capacity of the biological deodorizing apparatus 1 is insufficient, the supply pump 8b is operated to supply microorganisms to the packed bed 10. Thereby, the quantity of the microorganisms of the packed bed 10 can be increased, and the deodorizing capability of the biological reaction tower 2 can be improved.

  In the biological deodorization apparatus 1 of the first embodiment, a microorganism storage tank 15 that stores microorganisms that have fallen from the packed bed 10 is disposed below the packed bed 10 and is filled with water 16. Further, a narrowed portion 15 a is formed in the lower part of the microorganism storage tank 15. By forming the narrowed portion 15a, the microorganisms inside the microorganism storage tank 15 can be collected and concentrated in one place (the microorganism concentration portion 14 can be formed).

  In addition, the biological deodorization apparatus 1 is provided with a microorganism supply mechanism 8 for supplying microorganisms concentrated in the microorganism concentration unit 14 to the packed bed 10. Thereby, when the deodorizing ability of the microorganisms of the packed bed 10 is insufficient, the packed bed 10 can be supplemented with microorganisms.

  The biological deodorization apparatus 1 is provided with an odor component concentration detector 4b that measures the concentration of odor components contained in the gas that has passed through the biological reaction tower 2. The odor component concentration detector 4b can detect the shortage of the deodorizing ability of the biological reaction tower 2. Further, the odor component concentration detector 4 b is connected to the control unit 9. The controller 9 can replenish the packed bed 10 with microorganisms by operating the supply pump 8b when the deodorizing ability of the biological reaction tower 2 is lowered. By replenishing the packed bed 10 with microorganisms, the deodorizing ability of the biological reaction tower 2 is improved. Therefore, when the processing capacity is insufficient with respect to the concentration of the odor component contained in the gas introduced into the biological reaction tower 2, the processing capacity can be immediately improved and the residual odor component can be suppressed.

  In addition, even when the operation of the biological deodorizing apparatus 1 is stopped for some reason and the operation is started again, the supply pump 8b can be operated. When the operation is stopped, the microorganisms in the packed bed 10 may be significantly reduced. When the operation is resumed, the supply pump 8b is operated and the microorganisms are supplied to the packed bed 10, so that the processing capability can be increased immediately after the re-operation.

(Second Embodiment)
The whole structure of the biological deodorizing apparatus 20 of 2nd Embodiment is shown in FIG. The biological deodorizing apparatus 20 is different from the biological deodorizing apparatus 1 of the first embodiment in the configuration of the gas introduction pipe 23 and the gas discharge pipe 24. In addition, about the component of the same aspect as the above-mentioned 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The gas introduction pipe 23 of the biological deodorization apparatus 20 is provided at the bottom of the biological reaction tower 2. A microorganism storage tank 15 is arranged in the lower part of the biological reaction tower 2, and the gas introduction pipe 23 is connected to the bottom (constriction 15 a) of the microorganism storage tank 15.

  The microorganism storage tank 15 includes a microorganism storage unit 13 in which water 16 containing microorganisms is stored, and a microorganism concentration unit 14 that concentrates the microorganisms therebelow. A stenosis part 15a is formed at the bottom of the microorganism storage tank 15, and a microorganism concentration part 14 is formed in the stenosis part 15a to concentrate microorganisms. The gas introduction pipe 23 is connected to the narrowed portion 15a. That is, the gas introduced into the biological reaction tower 2 passes through the microorganism concentration unit 14.

The gas introduction pipe 23 is provided with a fan 23a. Thereby, the gas containing an odor component can be forcibly introduced into the biological reaction tower 2.
The gas containing the odor component introduced from the gas introduction pipe 23 into the biological reaction tower 2 passes through the biological reaction tower 2 from below to above. Further, the gas is discharged from a gas discharge pipe 24 connected to the top of the biological reaction tower 2. Due to the action of the fan 23 a provided in the gas introduction pipe 23, the internal pressure of the biological reaction tower 2 becomes high, so that the gas is discharged from the biological reaction tower 2 through the gas discharge pipe 24.

The gas containing the odor component introduced from the gas introduction pipe 23 into the biological reaction tower 2 passes through the microorganism concentrating unit 14 and the microorganism storing unit 13 of the microorganism storing tank 15 in this order. Furthermore, this gas rises, passes through the packed bed 10, and is discharged from the gas discharge pipe 24 connected to the top.
Since microorganisms are concentrated in the microorganism concentration unit 14, the odor components contained in the gas are partially decomposed by the concentrated microorganisms. Furthermore, also in the packed bed 10, the odor component is decomposed by the microorganisms attached to the carrier 11.

  The biological deodorization apparatus 20 of the second embodiment can achieve the same effects as the biological deodorization apparatus 1 of the first embodiment. In addition, since the gas containing the odor component passes through the microorganism concentration unit 14 and the packed bed 10 and the odor component is decomposed also in the microorganism concentration unit 14, the odor component is compared with the case of passing through only the packed layer 10. The decomposition efficiency of can be increased. Moreover, by allowing the gas containing the odorous component to pass through the microorganism concentration unit 14, it is possible to help the growth of microorganisms stored in the microorganism concentration unit 14 and increase the microorganisms in the microorganism concentration unit 14. Furthermore, the activity of the microorganisms in the microorganism concentration unit 14 can be kept high. Therefore, when the processing capacity of the packed bed 10 is insufficient, or when the biological deodorizing apparatus 20 is restarted, more microorganisms can be supplied to the packed bed 10. In addition, highly active microorganisms can be supplied to the packed bed 10. Therefore, the processing capability of the packed bed 10 can be improved more effectively and reliably.

(Third embodiment)
The whole structure of the biological deodorizing apparatus 30 of 3rd Embodiment is shown in FIG. The biological deodorization apparatus 30 differs from the biological deodorization apparatus 20 of the second embodiment in that activated sludge 39 is stored in advance in the microorganism storage section 33 of the microorganism storage tank 35 in addition to water. The activated sludge 39 is sludge used in the activated sludge method for treating organic waste water.
In addition, about the component of the same aspect as 1st Embodiment or 2nd Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

The gas introduction pipe 23 of the biological deodorization apparatus 30 is provided at the bottom of the biological reaction tower 2. A microorganism storage tank 35 is disposed in the lower part of the biological reaction tower 2, and the gas introduction pipe 23 is connected to the bottom of the microorganism storage tank 35.
The microorganism storage tank 35 has a microorganism storage part 33 in which the activated sludge 39 is stored, and a microorganism concentration part 34 for concentrating the microorganisms therebelow. A narrowed portion 35a at the bottom of the microorganism storage tank 35 is formed, and the gas introduction pipe 23 is connected to the narrowed portion 35a. That is, the gas introduced into the biological reaction tower 2 passes through the microorganism storage part 33 in which the microorganism concentration part 34 and the activated sludge 39 are stored.

The gas containing the odor component introduced from the gas introduction pipe 23 into the biological reaction tower 2 passes through the microorganism concentration part 34 and the microorganism storage part 33 of the microorganism storage tank 35 in this order. Furthermore, this gas rises, passes through the packed bed 10, and is discharged from the gas discharge pipe 24 connected to the top.
Since microorganisms are concentrated in the microorganism concentration unit 34, the odor component contained in the gas is partially decomposed by the concentrated microorganisms. Next, part of the odor component is further decomposed by the activated sludge 39 stored in the microorganism storage unit 33. Furthermore, also in the packed bed 10, the odor component is decomposed by the microorganisms attached to the carrier 11.

The biological deodorization apparatus 30 according to the third embodiment can achieve the same effects as the biological deodorization apparatus 1 according to the first embodiment. In addition, the gas containing the odorous component sequentially passes through the microbial concentration unit 34, the microbial storage unit 33, and the packed bed 10, and the odorous component is also decomposed in the microbial concentration unit 34 and the microbial storage unit 33. The decomposition efficiency of odor components can be increased as compared with the case where only the gas passes through.
Further, the odor component passes through the microorganism storage tank 35 (the microorganism concentration section 34 and the microorganism storage section 33), so that the growth of microorganisms stored in the microorganism storage tank 35 can be helped and the activity of microorganisms can be further increased. Thereby, the microorganisms of the microorganism concentration part 34 can be increased, and activity can be improved. When the processing capacity of the packed bed 10 is insufficient, or when the biological deodorizing apparatus 30 is restarted, more microorganisms can be supplied to the packed bed 10. In addition, highly active microorganisms can be supplied to the packed bed 10. Therefore, the processing capability of the packed bed 10 can be improved more effectively and reliably.

  Furthermore, by storing activated sludge 39 in advance in the microorganism storage tank 35 in addition to water, the entire apparatus will not run out of microorganisms. For example, when the biological deodorization apparatus 30 is stopped for a long time and then restarted, it is conceivable that the microorganisms in the packed bed 10 are insufficient. However, since microorganisms are stored as activated sludge in the microorganism storage tank 35 of the biological deodorization apparatus 30, the apparatus can be returned by operating the microorganism supply mechanism 8.

  According to at least one embodiment described above, the microorganisms that have fallen from the packed bed 10 are stored below the packed bed 10 and concentrated, and the microorganism concentrated sections 14 and 34 are concentrated from the microorganism concentrated sections 14 and 34. By providing the microorganism supply mechanism 8 that can supply the extracted microorganisms to the drawn packed bed 10, it is possible to provide a biological deodorizing apparatus and a biological deodorizing method that can increase the deodorizing ability in a short time.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1, 20, 30 ... Biological deodorizing device, 2 ... Biological reaction tower, 3, 23 ... Gas introduction pipe (gas introduction part) 4, 24 ... Gas exhaust pipe (gas exhaust part), 4a, 23a ... Fan, 4b ... Odor component concentration detector (detection unit), 5 ... pH adjusting unit, 5a ... pH adjusting pipe, 5b ... pH adjusting pump, 5c ... pH adjusting agent tank, 6 ... Watering part, 6a ... Watering pipe, 6b ... Sprinkling pump, 6c ... Shower nozzle for sprinkling, 7 ... pH meter, 8 ... Microbe supply mechanism, 8a ... Supply pipe, 8b ... Supply pump, 8c ... Shower nozzle for supply, 9 ... Control unit, 10 ... Filling Layer 11, Carrier 13, 33, Microorganism storage section 14, 34 Microorganism concentration section 15, 35 Microorganism storage tank 15 a 35 a Constriction section (bottom), 16 Water 39 Activating sludge

Claims (9)

A biological reaction tower into which a gas containing an odor component is introduced;
A packed bed provided inside the biological reaction tower and having a carrier holding microorganisms;
A microorganism storage tank provided inside the biological reaction tower and having a microorganism concentrating part for storing water containing microorganisms below the packed bed and concentrating the microorganisms;
A microorganism supply mechanism capable of supplying microorganisms extracted from the microorganism concentration section to the packed bed;
A detection unit for detecting a lack of processing capacity of the odor component in the biological reaction tower;
A control unit that issues a command to cause the microorganism supply mechanism to pull out microorganisms from the microorganism storage tank and supply the microorganisms to the packed bed when the detection unit detects that the processing capacity of the odor component is insufficient. Prepared,
The biological reaction tower is provided with a gas discharge part for discharging the gas processed with the odor component,
The detection unit is an odor component concentration detector that detects the concentration of an odor component contained in a gas passing through the gas discharge unit,
The gas discharge part is provided with a fan that forms a flow path for discharging gas,
The control unit is connected to the microorganism supply mechanism, the detection unit, and the fan, controls their operation, monitors whether they are operating normally, and issues a warning when an abnormality is detected. Stop the whole operation,
The control unit issues a command to cause the microorganism supply mechanism to pull out microorganisms from the microorganism storage tank and supply the microorganisms to the packed bed during re-operation.
Biological deodorization device.   The biological deodorization apparatus according to claim 1, wherein a gas introduction part for introducing a gas containing the odor component into the biological reaction tower is provided below the packed bed.   A gas introduction part for introducing a gas containing the odor component into the biological reaction tower is provided at the bottom of the microorganism storage tank, and the gas containing the odor component passes through the microorganism concentration part. The biological deodorization apparatus according to claim 1 or 2.   The biological deodorization apparatus according to any one of claims 1 to 3, wherein activated sludge is stored together with the water in the microorganism storage tank.   The biological deodorization apparatus as described in any one of Claims 1-4 with which the pH adjustment part which adjusts the pH of the said water of the said microorganisms storage tank is provided.   The biological deodorization apparatus according to any one of claims 1 to 5, further comprising a watering unit that sprays the water extracted from the microorganism storage tank into the packed bed. Using a biological reaction tower comprising a packed bed having a carrier in which microorganisms are held, and a microorganism storage tank that is disposed below the packed bed and stores water and microorganisms that have fallen off the packed bed,
Introducing a gas containing an odor component into the biological reaction tower, decomposing the odor component by passing through the packed bed,
Forming a microorganism concentrating part for concentrating the microorganisms below the microorganism reservoir, pulling out microorganisms from the microorganism concentrating part when there are insufficient microorganisms in the packed bed, and supplying to the packed bed;
When a detection unit that detects a lack of deodorizing capability in the biological reaction tower is provided, and the detection unit detects a lack of processing capability of the odor component,
Or, when the operation of the biological reaction tower is stopped and then restarted,
Draw microorganisms from the microorganism concentration unit, supply to the packed bed,
The detection unit detects the concentration of an odor component contained in the gas in a path for discharging the gas from the biological reaction tower,
A microorganism supply mechanism that pulls out microorganisms from the microorganism concentration unit and supplies the microorganisms to the packed bed, a detection unit that detects a lack of processing ability of the odor components, and a gas in which the odor components are processed is discharged from the biological reaction tank. To monitor the normal operation of the fan and stop the entire operation by issuing a warning when an abnormality is detected.
Biological deodorization method.   The biological deodorization method according to claim 7, wherein a gas containing the odor component is introduced from the bottom of the biological reaction tower and passed through the microorganism concentration unit.   The biological deodorization method according to any one of claims 7 and 8, wherein activated sludge is stored together with the water in the microorganism storage tank.

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