JPH074504B2 - Deodorizer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to ammonia, hydrogen sulfide, methyl mercaptan, methyl sulfide, methyl disulfide generated in human wastewater treatment plants, sewage treatment plants, and other wastewater treatment plants of various plants. The present invention relates to a deodorizing device for biologically deodorizing a malodorous gas containing a malodorous component such as.

<Prior Art> As such a deodorizing device, the present patent application is
Japanese Unexamined Patent Publication No. 60-61023 proposes a deodorizing device which is provided with a peat packed layer carrying microorganisms for decomposing malodorous components and deodorizes the peat packed layer by ventilating the peat packed layer in an upward flow.

Then, in this conventional apparatus, the peat packed bed increases the weight by including the wash water sprinkled during operation, and the layer is compressed on the support of the packed bed by the load from above, and the consolidation proceeds, and In order to prevent the increase of pressure loss accompanying it and the inability to ventilate odorous gas, Raschig rings with a diameter of 10 to 20 mm are filled with peat so that the peat is filled between the Raschig rings. It constitutes the peat filling layer.

<Problems to be Solved by the Invention> The Raschig ring is a plastic filler for gas-liquid contact used in a chemical cleaning tower or the like, and has small pores. In contrast, peat fibers are relatively long. Therefore, the fibers of peat do not sufficiently enter into the Raschig ring pores,
A large number of voids that do not contain peat remain in the Raschig ring, which makes the filling rate of the peat extremely small at 50% or less, and the Raschig ring and the peat are separated, making it difficult for the Raschig rings to come into contact with each other. Raschig rings filled with peat do not fully exert the effect of preventing consolidation.
In addition, the malodorous gas short-passes through the voids of the Raschig rings that do not contain peat, and sufficient deodorizing treatment cannot be performed.

<Means for Solving the Problems> Therefore, the present invention is characterized in that the packed layer supporting microorganisms in the treatment tower is formed of a laminate of fibrous peat and a plastic filler having a diameter of 150 mm or more and a large porosity. And

<Embodiment> In the illustrated embodiment, 1 is a vertically long processing tower, 2 is a supply port for supplying a malodorous gas into the tower from below, 3 is a discharge port provided at the top of the tower for discharging the processing gas, 4 Is a packed bed provided in the tower and has a layer of fibrous peat 5 and a diameter of 150 mm with a large porosity.
It is composed of a laminate of the above plastic fillers 6.

The plastic filler 6 is formed of plastic in a state in which a curved piece having a large opening and a flat piece having a large opening are combined intricately and have an average diameter of 150 mm.
It has a spherical shape with a porosity of about 97%, and even if they are arranged and accumulated in various postures, they contact each other at points and lines, but they do not make surface contact, and microorganisms adhere to the surface, A commercially available contact material (trade name: Bios, manufactured by Nichinan Sangyo Co., Ltd.) that can proliferate can be used.

For example, in order to form a packed bed 4 having a bed height of about 750 mm, the above-mentioned plastic packing material 6 having an average diameter of 150 mm is laid on a support material 7 erected in the lower part of the tower to form the lowermost packing material. While filling the fibrous peat in the opening and adjacent space, make the peat layer 5 at the bottom of the peat, and then in the same arrangement so that it contacts the top of the filling material at the bottom of the ply. Of the filling material of the second stage, while filling the fibrous peat in the opening of the filling material of the second stage and in the adjacent gap, form the peat layer 5 of the second stage thereon, and repeat this to the fifth stage. The eye filling material is spread, and the uppermost peat layer 5 is formed so that the filling material is filled with the peat filling the openings of the filling material and the adjacent gaps.

Since the malodorous gas may short-pass if the fillers in each stage are randomly spread, it is preferable that the fillers in each stage are arranged in the same manner as described above. It is preferable to use only the long fibers excluding the short fibers by sieving the peat with a sieve having an opening of about 8 mm.

When the packed bed 4 is formed in this manner, the diluted water of the activated sludge, the activated sludge treated water, the river water, etc. are sprayed to the packed bed 4 by the sprinkling pipe 8 at the beginning, and the microorganisms such as nitrifying bacteria and sulfur bacteria are peat layer 5 ,
After inoculating and proliferating the filling material 6 at each stage, and acclimatizing it, a malodorous gas is supplied to the inside of the tower through the air supply port 2 and upwardly flows in the packed bed 4 to remove the malodorous components by the microorganisms. The processing gas that is oxidatively decomposed and contains almost no malodorous component can be discharged from the discharge port 3.

After the microorganisms have acclimatized in the packed bed 4, spray water is sprayed from the sprinkling pipe 7, excess water is drained from the drain 9, and the water content of the packed bed is kept at 50-80%, preferably 60-70%. Maintain microbial activity.

<Effects of the Invention> In the filling layer according to the present invention, assuming that the filling rate when only peat is filled is 100%, the plastic filler has a large morphology and a high porosity, and long fibers of peat can be packed inside. Therefore, the filling rate of peat is 80% or more. And
Since the microorganisms are acclimatized to the surface of the filler, the deodorizing performance was almost the same as that of peat alone.

In addition, the pressure loss at the beginning of the deodorizing operation was low, and the pressure loss did not increase due to changes with time.

Furthermore, the flow of the sprinkled water was smooth, the washing could be carried out quickly, and the water did not become aeration resistance.

[Brief description of drawings]

The drawing is a longitudinal sectional view of an embodiment of the deodorizing apparatus of the present invention, in which 1 is a treatment tower, 2 is an inlet, 3 is an outlet, 4 is a packed layer, 5 is a peat layer, and 6 is packed. Indicates the material.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B01D 53/81 B01D 53/34 ZAB

Claims (1)

[Claims] 1. A deodorizing apparatus for deodorizing a packed bed formed by packing a carrier carrying microorganisms capable of decomposing a malodorous component in a processing tower to deodorize a malodorous gas, wherein the packed layer is made of fibrous peat. A deodorizing device characterized by being formed of a laminated body of plastic filler having a diameter of 150 mm or more and having a large porosity.