JPH03242223A - Filter bed-type biological deodorizer - Google Patents

Abstract

PURPOSE:To improve efficiency of the deodorizer in removing the malodorous component in a raw gas in the filter bed by using the cylindrical or spherical filter bed and making the bed rotatable. CONSTITUTION:A cylindrical or spherical filter bed 22 is used for the filter bed-type biological deodorizer having the filter bed 22 for immobilizing deodorizing microbes and used for removing the malodorous component, and the filter bed is made rotatable. Since the filter bed 22 is rotated, the entire surface 22a of the filter bed 22 is used as the inlet and outlet for a raw gas 3, and the microbes are acclimatized at all times with an ordinary density of the raw gas 3 without any difference between the upper and lower parts of the filter bed 22. Accordingly, the malodorous component is more efficiently removed by a large amt. of the microbes in the filter bed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a floor-type biological deodorizing device used as deodorizing equipment for removing odors generated in sewage treatment plants, various factories, etc.

BACKGROUND OF THE INVENTION FIG. 2 is a block diagram of a conventional floor-type biological deodorizing device. In FIG. 2, a filter bed section 2 is provided inside the biological deodorization tower 1, and microorganisms involved in deodorization are immobilized on the filter bed section 2. The raw gas 3 having an odor supplied from below the filter bed section 2 is deodorized by microorganisms while passing through the filter bed section 2, and is taken out from the upper part of the biological deodorization tower 1 as a treated gas 4 by a deodorizing fan 5. Further, a circulating water tank 6 is formed in the lower part of the biological deodorizing tower 1, and the circulating water 7 of this circulating water tank 6 is sprinkled with water from a watering pipe 9 provided above the filter bed part 2 by a watering pump 8. Water is supplied to the filter bed section 2, and reaction products are decomposed by microorganisms and remain in the filter bed section 2! ! V (sulfate ions, nitrate ions, etc.) is washed and flows down into the circulating water tank 6. The circulating water 7 containing the reaction product is neutralized by a neutralizing agent (such as caustic soda) 10 supplied to the circulating water tank 6, and is again sprayed from the water sprinkling pipe 9. Reference numeral 11 indicates makeup water to be supplied to the circulating water tank 6.

Problems to be Solved by the Invention In the conventional bed-type biological deodorizing device described above, upward flow operation is generally performed, and raw gas 3 having a bad odor is blown from the lower part of the filter bed section 2. . As a result, the distribution of microorganisms in the filter bed section 2 is such that the amount of microorganisms increases in the lower part of the filter bed section 2 because the biota matches the load of the raw gas 3, and the amount of microorganisms decreases toward the upper part. Such biota is formed in the filter bed section 2. Therefore, the concentration of the raw gas 3 at the inlet of the filter bed section 2 is the normal concentration A, as shown by the solid line in FIG.
In this case, most of the raw gas 3 is processed and deodorized at the outlet of the filter bed section 2, but if the concentration increases from the normal concentration A to a high concentration B, the raw gas 3 has a high concentration B. Floor part 2
Even if many microorganisms grow in the lower part of the filter, they cannot be completely processed, and the raw gas concentration 3 at the outlet side of the filter bed 2 remains untreated, making it impossible to cope with load fluctuations of the raw gas 3 on the filter bed 2. There was a problem.

The present invention solves the above-mentioned conventional problems, and improves the odor component removal performance of the raw gas in the filter bed section, thereby making it possible to cope with the case where the raw gas concentration increases from a normal concentration to a high concentration. Deodorizing clothes! The purpose is to provide.

Means for Solving the Problems In order to solve the above problems, the bed-type biological deodorizing device of the present invention is a filter-bed type biological deodorizing device that has a filter bed section for fixing microorganisms involved in deodorization and removes odor components. In biological deodorizing equipment,
The filter bed is configured to have a cylindrical or spherical shape and to be rotatable.

Action Due to the above structure, microorganisms! By rotating the cylindrical or spherical bed from the II+ incubation period, a large amount of microorganisms can be retained in the filter bed, improving the odor component removal performance in the filter bed, and Even when the gas concentration increases from high to high, it is possible to remove odor components without leaving them behind.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a floor-type biological deodorizing apparatus showing one embodiment of the present invention, and parts having the same functions and effects as those of the conventional example are given the same reference numerals, and the explanation thereof will be omitted. In FIG. 1, a cylindrical or spherical filter bed section 22 is rotatably provided inside a biological deodorization tower 21, and this filter bed section 22 is formed of a porous ceramic carrier. Furthermore, microorganisms involved in deodorization are immobilized on the chamber floor portion 22, and examples of the microorganisms include sulfur oxidizing bacteria and nitrifying bacteria. Also,
The microorganisms are a depending on the raw gas supplied to the biological deodorizing tower 21.
and suitably match raw gas 3.

The operation of the above configuration will be explained below.

Since the filter bed section 22 rotates, the entire surface 22a of the filter bed section 22
serve as the inlet and outlet of the raw gas 3, and microorganisms are always acclimatized to the raw gas 3 at its normal concentration regardless of whether it is above or below the filter bed section 22. Therefore, by rotating the cylindrical or spherical bed section 22 during the microorganism acclimatization period, the filter bed section 22 retains a large amount of microorganisms as a whole. As a result, as shown by the broken line in FIG. 3, even when the raw gas 3 has a slightly higher concentration B than the normal concentration A, the raw gas removal performance is high due to the large number of microorganisms in the filter bed section 22, and the raw gas removal performance is high. It is possible to remove the odor components of the gas 3 without forming them.

Effects of the Invention As described above, according to the present invention, there is a large amount of microorganisms throughout the filter bed, regardless of whether it is above or below. ! Because of the large number of microorganisms in the filter bed, the odor component removal performance can be improved, and it is possible to adequately deal with cases where the gas concentration increases from normal to high. This can sufficiently solve problems such as the inability to remove odor components in the filter bed when the raw gas load increases.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a floor-type biological deodorizing device showing an embodiment of the present invention, FIG. 2 is a block diagram of a conventional floor-type biological deodorizing device,
FIG. 3 is a diagram for explaining how odor components are removed with respect to raw gas concentration, comparing the conventional example and the embodiment of the present invention. 2.22...filter bed section.

Claims (1)

[Claims] 1. In a filter bed type biological deodorization device that has a filter bed section for immobilizing microorganisms involved in deodorization and removes odor components,
A filter bed type biological deodorizing device characterized in that the filter bed section is configured to have a cylindrical or spherical shape and is configured to be rotatable.