JPH046409B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a deodorizing filter used to treat malodorous components in malodorous gases using microorganisms or enzymes that perform deodorizing action. [Conventional technology] Human waste treatment plants, sewage treatment plants, waste treatment plants, slaughterhouses, food factories, fish iliac treatment plants, pig farms, poultry farms,
Odors are a problem in pulp manufacturing plants. Such malodorous components generally include ammonia, hydrogen sulfide, methyl sulfide, mercaptan,
The main component is amines, and all of them contain nitrogen atoms as in ammonia and amines, and sulfur atoms as in hydrogen sulfide, methyl sulfide, and mercaptans. Conventionally, combustion methods, activated carbon adsorption methods, cleaning methods, etc. have been known as deodorization methods to remove these malodorous components, but in recent years, biological deodorization methods using microorganisms have become popular due to their low running costs, etc. It has attracted attention because of its advantages, and the development of such devices is progressing. For example, as in Japanese Patent Application Laid-Open No. 57-200158, a method utilizing biochemical reactions of aerobic bacteria has been proposed. This method removes malodorous components from the malodorous gas by bringing the malodorous gas containing ammonia, hydrogen sulfide, methyl sulfide, mercaptan, amines, etc. into gas-liquid contact with a culture solution containing aerobic bacteria. The content is to make malodorous components odorless by oxidizing and reducing them using enzymes and enzymes. However, as an example of the gas-liquid contact, there is only a filling section, but no specific example thereof is given. Furthermore, in JP-A No. 59-98717, fillers are made of molded products such as wood chips, or porous molded products such as acetate non-woven fabric, glass wool, asbestos, unglazed ceramics, wood chips, synthetic resin, etc. in spherical and cylindrical shapes. JP-A-62-7425 discloses that the filler is made of wood, porous stone, unglazed or synthetic resin. Although a plate-shaped or spherical body with a side length of 5 mm to 50 mm is shown, it is necessary to ensure a sufficient flow path for gas-liquid contact when such a packing is used. However, I couldn't say that. In addition, Japanese Patent Application Laid-Open No. 61-271017 discloses that a gas absorption liquid consisting of water or nutrient salt water is sprayed onto malodorous gases.
It has been proposed to bring the absorbent solution into contact with immobilized microorganisms after dissolving and absorbing malodorous components to make them odorless. There are drawbacks such as the amount of liquid to be absorbed, and when the absorbing liquid is recycled, there is a risk of releasing malodorous components that have been absorbed. On the other hand, Japanese Patent Application Laid-open No. 62-221354 proposes a paper filter having a large number of small through holes impregnated with a microbial solution that has a deodorizing effect, and the filter is arranged as a cassette in a foul-smelling air flow path. has been done. As a specific example, the cassette body is made into a block shape by laminating a plurality of corrugated cardboard sheets in such a way that through-holes formed by corrugated insert paperboard are all lined up in the same direction between flat liner paperboards. The cassette body of this block-shaped cardboard filter is impregnated with a bacterial enzyme solution or a solution consisting of an enzyme solution and a bacterial solution that performs a deodorizing action, and is placed in the foul-odor air path. [Problems to be Solved by the Invention] In the device disclosed in JP-A No. 62-221354, the small through holes are linear flow paths, and the foul-smelling air is dispersed by the number of small holes, and a certain amount of gas-liquid contact is achieved. However, when the amount of gas to be processed increases, the deodorizing efficiency is not sufficient, and in order to improve the deodorizing efficiency, a large number of cassettes are required, resulting in an increase in the size of the entire device. There are some drawbacks as well. The purpose of the present invention is to eliminate the disadvantages of the conventional example,
To provide a deodorizing filter which can effectively carry out gas-liquid contact, has good deodorizing efficiency, and can be easily and inexpensively manufactured. [Means for Solving the Problem] In order to achieve the above-mentioned object, the present invention provides a deodorizing filter to which microorganisms or enzymes that perform a deodorizing action are attached or impregnated. It is a block-shaped product that is stacked in parallel, and the gist is that a large number of punched holes are formed in the paperboard that forms the corrugated board. [Function] According to the present invention, malodorous air collides with the cardboard filter in the flow path and disperses into the small through-holes of the filter. These small holes are continuous in the direction of travel of the flow path, but at the same time, since the paperboard forming this through hole has many punched holes, the holes are dispersed and enter the through holes. On the way through the through holes, the foul-smelling air disperses and branches to other through holes and collides with the edges of the punched holes, resulting in constant turbulence that effectively blocks the holes. It comes into contact with microorganisms that perform deodorizing action, and is deodorized. Additionally, this filter can be easily replaced as a cassette, and used filters can be easily disposed of by composting or drying and then burning. [Examples] Examples of the present invention will be described in detail below. FIG. 1 is a perspective view showing a first embodiment of the deodorizing filter of the present invention, and 1 in the figure is a filter made of cardboard. This filter 1 has small through-holes 2a formed by a corrugated cardboard 2, a core paperboard 3, and a liner paperboard 4.
However, a large number of cardboard boxes 2 are stacked so that they are all aligned in the same direction. Furthermore, a large number of punched holes 5 were formed in the core paperboard 3 and the liner paperboard 4 that form the small through holes 2a of the corrugated board 2. The punched holes 5 may be made by punching at a stage after the corrugated board 2 is manufactured, or the punched holes 5 may be punched in the paperboards 3 and 4 constituting the corrugated board in the previous stage to make the corrugated board 2. The paperboards 3 and 4 with these holes may be pasted together to form a corrugated board. 2 to 4 show the state of the punched hole 5. In both FIGS. 2 and 3, the punched hole 5 is formed by punching the cardboard 2, and
The punched hole 5 in the figure is larger in diameter than the punched hole 5 in FIG. 2. If the punched hole 5 penetrates the cardboard 2 in this way, the adjacent small through holes 2 in the same cardboard
An open part is formed between a and they are connected. Further, when the filter 1 is made by stacking these corrugated cardboards 2, if the openings of the punched holes 5 in adjacent corrugated cardboards overlap even to some extent, open portions will be formed between the small through holes of the adjacent corrugated cardboards. Further, as shown in FIG. 3, if the size of the punched holes 5 made in the paperboard is the largest and passes through the corrugated cardboard 2, a large number of small through holes 2a will communicate between adjacent corrugated cardboards. FIG. 4 shows a case where the punched holes 5 are formed only in the liner paperboard 4. Even when the punched holes 5 made in the paperboard 4 are small and do not pass through the corrugated cardboard 2, the corrugated cardboard 2 Small through hole in the middle 2
In case a, narrowing occurs due to protrusions formed when punching the hole 5. FIG. 5 shows a second embodiment of the present invention, in which a corrugated board 2 formed from a core board 3 having a large number of punched holes 5 and a liner board 4 are laminated in a spiral shape to form a cylindrical filter. It was set to 1. Such a cardboard filter 1 is attached to or impregnated with a microbial solution or an enzyme solution that performs a deodorizing action. A culture cultured in a solid medium is dissolved in water and impregnated by spraying or immersion. Microorganisms that carry out the deodorizing action include those selected from cellulose-degrading bacteria, filamentous fungi, sulfur bacteria, atmospheric nitrogen-fixing bacteria, rhizobia, sulfur bacteria, actinomycetes, yeast, and pseudomonas bacteria. Depending on the situation, a plurality of microorganisms may be mixed. In this way, the cardboard filter 1 impregnated with the microorganisms that perform the deodorizing action can be used alone or in combination with a frame or the like to form a cassette body, with small through holes 2a arranged in the odor air path in the direction of air flow. It is placed so that foul-smelling air can pass through. At that time, the foul-smelling air hits the cardboard filter 1 in the flow path, and the small through hole 2a of the filter 1
Disperse and enter within. This small hole 2a is continuous, but since there are many punched holes 5 in the paperboard 3 or 4 that forms this small through hole 2a, the small holes 2a are dispersed and penetrated into the small through hole 2a. On the way through the small through-hole 2a, the foul-smelling air disperses and branches to other small through-holes 2a, or collides with the edge of the punched hole 5, resulting in constant turbulence and effectively blowing the small hole. It comes into contact with the wall, where it comes into contact with the microorganisms that carry out the deodorizing action and is deodorized. Furthermore, when a plurality of cardboard filters 1 are disposed, it is also possible to make them each contain different types of bacteria and expect a composite deodorizing effect. On the other hand, the used filter 1 can be easily disposed of by burning it or composting it. Next, an experiment was conducted on the deodorizing performance of the filter 1 according to the present invention, and the results will be shown below. Experiment 1 Deodorizing tower column 100mmφ×500mm Filter used B-fluted single-sided cardboard stacked in a spiral shape
100mmφ×200mm. (1) The single-sided cardboard has many holes punched with a 1mmφ needle. (2) There are many punched holes of 3mmφ in the single-sided cardboard. (3) There are many punched holes of 5mmφ in the single-sided cardboard. (4) There are many punched holes of 10mmφ in the single-sided cardboard. (5) No punched holes were made (comparative example). Filter installation position Center of deodorizing tower column (150mm from the bottom of the column) Microorganisms used Mainly sulfur bacteria Amount of water to be replenished 130g/day (amount of sprayed water that does not dry the filter) Amount of bad odor gas fed 8.12/min Offensive odor Table 1 below shows the results obtained under the conditions of a gas flow rate of 2.0 cm/s and a concentration of foul-smelling gas at the deodorizing column inlet of 5 ppmHzS (constant).

〔Effect of the invention〕

As described above, the deodorizing filter of the present invention is a paper filter that removes malodorous components using microorganisms or enzymes that perform a deodorizing action. The flow can always be made turbulent, and as a result, gas-liquid contact can be effectively caused, and deodorizing work can be carried out efficiently.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a first embodiment of the deodorizing filter of the present invention, FIGS. FIG. 5 is a perspective view showing a second embodiment of the present invention. 1...Filter, 2...Cardboard, 2a...
Small through hole, 3... paperboard for insert, 4... paperboard for liner, 5... punching hole.

Claims (1)

[Claims] 1. In a deodorizing filter that is attached or impregnated with microorganisms or enzymes that perform a deodorizing effect,
A deodorizing filter characterized in that the filter is in the form of a block made by laminating corrugated cardboard so that the small through holes thereof are arranged in the same direction, and a large number of punched holes are formed in the paperboard forming the corrugated cardboard.