JPH10277357A - Method for deodorizing gas containing odoriferous component and deodorizing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the treatment of an odoriferous gas at a low operating cost by introducing a gas containing an odoriferous component through a part below a fibrous spherical contact material packed in a packed tower and on the other hand, sprinkling water from above to decompose the odoriferous component with the help of a microbe carried on the surface of the fibrous spherical contact material. SOLUTION: Packed layers 2, 2 use a sphere made up of a crimped yarn of polyester filament. A water receiver tank 4 receives industrial water or a treated water originating from drain treatment facilities, and this water is supplied to a sprinkler 3 by a sprinkler pump 5 to sprinkle the water to the filled layers 2, 2, while the surplus water is stored in the water receiver tank 4 as a circulation water. The odoriferous gas as a gas containing an odoriferous component originating from the untreated water tank and the sludge storage layer of a combined purification tank, is used for circulating upward through the filled layers 2, 2 with the assistance of an air blower. Thus the odoriferous component is decomposed by a microbe carried on the surface of a contact material. The surplus water beyond the supply level to the water receiver tank 4 is drained from a drainage pipe arranged in the water receiver tank 4 through a siphon check pipe 6 in accordance with the water level of the water receiver tank 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing method and a device for treating various odorous component-containing gases by microorganisms carried on the surface of a fiber-shaped spherical contact material.

[0002]

2. Description of the Related Art Conventionally, as a method of treating an odorous component-containing gas, an adsorbent such as activated carbon has been mainly used.
However, this adsorbent such as activated carbon has a limited amount of adsorption,
When the amount of adsorption reaches saturation, it is necessary to replace and regenerate the adsorbent. Particularly when the concentration of the odorous component-containing gas is high, the life of the adsorbent is short and the economic burden is large.

[0003] Therefore, in recent years, a deodorizing method using microorganisms that does not require replacement of the adsorbent has been attracting attention. This is a method in which microorganisms that propagate with the odor component as a nutrient source are carried on the surface of the contact material, and the microorganisms decompose and deodorize the odor component.Currently, these contact materials include soil, humus, plastic , Ceramics and processed products thereof, and those on which microorganisms are fixed are used. However, when these materials are used as a contact material, there are some problems in filling the contact material into a packed tower and treating it by contacting with an odor component-containing gas.

[0004] First, when the contact material to be packed in the packed tower is rough, the pressure loss at the time of gas passage is low and the gas can be easily passed. However, since the contact surface area with the gas is small, the contact material is small. There is a large amount of gas that is not treated without contacting with the gas, and in order to prevent this, it is necessary to take measures such as increasing the chance of contact with the gas by increasing the size of the packed tower.

Next, when a dense contact material having a large contact surface area with the gas and a high treatment efficiency is used, the pressure loss at the time of gas passage is large, and it is difficult to increase the gas passage speed. As a countermeasure, it was necessary to use a fan with large power, but this was also limited. Furthermore, since the contact material made of soil, humus, ceramics or processed products thereof is heavy, a packed tower or a filter bed is required to have strength enough to withstand the weight of the contact material. I was

[0006] Due to the above problems, the deodorizing apparatus becomes large due to a wide bottom area of the contact material packed layer or an increase in the height of the contact material packed layer, or the packed tower becomes large. The apparatus cost and the operating cost have been high in terms of improving the strength of the floor, etc., and improving the capacity of the blower.

[0007]

SUMMARY OF THE INVENTION The present invention solves the problem of the use of conventional adsorbents and contact materials, and has a large surface area.
It is an object of the present invention to provide a method capable of treating odorous gas at a low operating cost by using a contact material of high water retention, high air permeability, and light material, and a very compact device suitable for carrying out the method. Is what you do.

[0008]

Means for Solving the Problems In order to achieve the above object, an odor component-containing gas is introduced from below the fiber spherical contact material loaded in the packed tower, and water is sprayed from above,
A method for deodorizing an odorous component-containing gas, comprising bringing the fiber-shaped spherical contact material into gas-liquid contact and decomposing an odorous component with microorganisms carried on the surface of the fiber-shaped spherical contact material; An odor-containing gas characterized by having a packed layer made of a spherical contact material, a sprinkler disposed above the packed layer, and a water receiving tank and an odor-containing gas introduction section disposed below the packed tower. It is a deodorizing device.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The fiber spherical contact material used in the present invention is formed into a spherical shape using a large number of fibers.
The shape may be a true spherical shape or a flattened spherical shape. In the case of a flattened sphere, the ratio of the minor axis to the major axis is preferably within 1: 3. The material of the fiber spherical contact material may be a durable fiber, for example, various fibers such as polyester, polyamide, polyolefin, polyvinyl alcohol-based, and polyacryl-based fibers. Is preferred in terms of strength, microbial adhesion and the like. The size of the sphere is suitably from 5 to 30 mm, especially from 10 to 20 mm.
mm is preferred.

A large number of the fiber spherical contact materials are packed in a packed tower to form a packed layer. The packed layer is not limited to one stage, and may be formed in a plurality of stages, and the odor component may be varied. If the density is high, it is more efficient to use a plurality of stages. Since the fiber spherical contact material is substantially spherical, it is possible to uniformly fill the packed tower without local sparseness,
No special equipment is required. Spherical contact material made of fiber is lighter than conventional soil, ceramic, etc.
Since the strength of the filter bed and the device need not be large, no special reinforcement is required, and the material of the filter bed and the device may be inexpensive.
Costs are low and maintenance is simple.

The spherical contact material made of fiber is intermittently sprinkled by a sprinkler disposed above the packed bed, and the surface thereof is maintained in a wet state, thereby promoting the attachment (seating) and propagation of microorganisms. At the same time, the oxidation products are removed by watering, but the watering interval is suitably about once every 0.5 to 3 hours. It is appropriate that the watering time per time is 0.3 to 2 minutes. In the case where there are a plurality of packed beds in the sprinkler, a sprinkler may be provided for each packed bed, or water may be sprayed to all the packed beds with one sprinkler.

Excess water that has been sprinkled from the sprinkler and passed through the fiber spherical contact material is stored and drained in a water receiving tank disposed below the packed tower, and the water from the water receiving tank is drained. It is also possible to circulate to

The odorous component-containing gas is supplied from below the packed bed, for example, from a gas inlet disposed in a water receiving tank, and rises in the packed bed. However, since the contact material is spherical, the gas to be treated is It passes through the contact materials evenly and in a zigzag manner, and has good air permeability inside the fiber spherical contact material. Liquid contact can be made with very low pressure loss. As described above, since the pressure loss is very small, even if a sirocco fan type blower having a low blowing pressure is used, gas can be blown, and the operating cost can be reduced.

The odor component in the odor component-containing gas passing through the packed bed is adsorbed by the fiber spherical contact material or absorbed by the moisture on the fiber spherical contact material. It is decomposed as a nutrient source by the microorganisms carried. Since the fiber spherical contact material of the present invention is made of fiber, it is excellent in air permeability and water permeability and has a large surface area, so that efficient gas absorption and decomposition by microorganisms are possible.

The deodorizing effect depends on the type and concentration of the odor component, but is determined by the ventilation speed of the odor component-containing gas and the contact time (contactable time). If the general odor gas ventilation speed is 0.3 m / sec or less, it is good. If the contact time is 2 sec or more, a good deodorizing effect can be obtained. To achieve a deodorization efficiency of 99% or more, the ventilation speed should be 0.2m / s
It is desirable that the contact time be not more than ec and the contact time be not less than 3 sec.

[0016]

Embodiments of the present invention will be described below in detail. Example 1 An odor component-containing gas was treated using the deodorizing apparatus 1 shown in FIG. In the deodorizing apparatus 1, sprinklers 3 and 3 are separately arranged above the two-stage packed layers 2 and 2, and a water receiving tank 4 is arranged below the packed layers 2 and 2, The water receiving tank 4 is provided with an odor component-containing gas introduction pipe, a water supply pipe, and a water sprinkling pipe to the water sprinkling pump 5.

For the filling layers 2 and 2, spherical bodies having a diameter of 10 mm and made of crimped polyester filament yarn were used. The water receiving tank 4 is supplied with water for factory use or treated water from a wastewater treatment facility continuously or intermittently through a water supply pipe, and the water is supplied to a watering pump 5 that operates intermittently by a timer.
Then, the water was supplied to the water sprayers 3 and 3 to sprinkle water on the packed layers 2 and 2, and the excess water was dropped into the water receiving tank 4 and stored in the water receiving tank 4 as circulating water.

As the odorous component-containing gas, the odorous gas in the raw water tank of the combined septic tank and the sludge reservoir is used. To absorb odor components, and decomposed by microorganisms carried on the surface of the contact material. Water that was excessively supplied to the water receiving tank 4 was drained from a drain pipe provided in the water receiving tank 4 through a siphon prevention pipe 6 according to the water level of the water receiving tank 4. The processing results performed under the processing conditions shown in Table 1 were very good as shown in Table 2.

[0019]

[Table 1]

[0020]

[Table 2]

Example 2 An odorous component-containing gas was treated using the deodorizing apparatus 1 shown in FIG. This apparatus 1 is configured to directly supply water for watering to a water sprinkler, and the other parts are the same as the apparatus shown in FIG. The odor component-containing gas was substantially the same as that of Example 1 except that the odor gas in the raw water tank of the wastewater treatment facility at the food processing plant was used and the treatment was performed under the treatment conditions shown in Table 3. The processing result was very good as shown in Table 4.

[0022]

[Table 3]

[0023]

[Table 4]

[0024]

As is apparent from the above description, according to the present invention, the use of a light contact material having a large surface area, high water retention, good air permeability, and low odor content can be achieved at low operating cost. It has become possible to provide a method capable of treating gas and a very compact device suitable for its implementation.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a deodorizing device used in Example 1 of the present invention.

FIG. 2 is a schematic view showing a deodorizing apparatus used in Embodiment 2 of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Deodorizing device 4 Water receiving tank 2 Packing layer 5 Sprinkling pump 3 Sprinkler 6 Siphon prevention pipe

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Atsushi Kawashima 360-B23-407 Nojiri-cho, Sakai-shi, Osaka

Claims (2)

[Claims] An odorous component-containing gas is introduced from below the fiber spherical contact material loaded in the packed tower, while water is sprayed from above, and the fiber spherical contact material is brought into gas-liquid contact with the fiber spherical contact material.
A method for deodorizing a gas containing an odor component, wherein the odor component is decomposed by microorganisms carried on the surface of the fiber spherical contact material. 2. A packed bed made of a spherical contact material made of fiber is provided in the packed tower, a sprinkler is provided above the packed bed, and a water receiving tank and an odor-containing gas introduction section are provided below the packed tower. A deodorizing device for an odorous component-containing gas.