JPH0595632U - Combined processing device for malodorous gas and sewage - Google Patents

Abstract

(57) [Abstract] [Purpose] The purpose of the present invention is to provide a new device that enables the rational and effective treatment of wastewater and malodorous gas at the same time by utilizing the wastewater treatment facility as a scavenger. An object of the present invention is to provide a combined treatment device for malodorous gas and sewage that does not require an alkaline agent for neutralization (pH adjustment) in the treatment. The present invention is, for example, an apparatus in which a packing layer 7 of granular material 6 is arranged on the upper side and a submerged filter bed 2 of granular filter medium 1 is arranged on the lower side with a gap 16 interposed therebetween. Clarified water 11 obtained by treating sewage in the submerged filter bed 2 is sprinkled from the upper part, and a malodorous gas is supplied to the packed bed 7 from the lower malodorous gas supply pipe 8 for deodorization. An apparatus for combined treatment of malodorous gas and sewage, characterized in that the sewage is made to flow from the gap between the sewage and the sewage, and oxygen-containing gas is supplied from the lower part to treat the sewage and the falling water of the sprinkling water.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a technology that skillfully treats both malodorous gas and sewage, sewage, and industrial wastewater with a new device.

[0002]

[Prior Art]

 Conventionally, malodorous gas and sewage are treated as separate treatments in different devices. Therefore, the equipment cost is high and it is difficult to implement. Also, a method for biologically deodorizing malodorous gas is known as in the case of sewage, but it requires a large amount of alkaline agent for neutralization (for pH adjustment), and is also a separate facility from sewage treatment equipment. There was a drawback that required.

[0003]

[Problems to be solved by the device]

 The present invention provides a new device that enables the rational and effective treatment of sewage and malodorous gas at the same time by utilizing the sewage treatment facility as a mechanism, and it has been conventionally necessary for biological deodorization of malodorous gas. The challenge is to establish a technology that eliminates the existing neutralizing agent (for adjusting pH).

[0004]

[Means for Solving the Problems]

 The present invention is an apparatus in which a packed bed of granular material is arranged on the upper side of a gap and a dipping filter of granular filter media is arranged on the lower side of the apparatus. The odorous gas is supplied from the lower part of the bed while flowing the sewage through the gap between the bed and the packed bed, and the malodorous gas is supplied from below the packed bed and / or below the submerged filter bed. This is a combined treatment device for odorous gas and sewage.

That is, according to the present invention, the upper part of the gap is configured as a packing layer, and the lower part thereof is configured as an immersion filter bed, the packing layer is configured as a deodorizing section for malodorous gas, and the immersion filter bed is configured as an aerobic biological treatment section for sewage. This is a device that shares processing functions and is configured integrally. Further, the present invention has a structure in which clear water is sprayed from the upper part of the deodorizing section to deodorize by microorganisms and deodorize with water, and the passing water from the deodorizing section can be treated together with sewage in a dipping filter. Therefore, deodorization and treatment of sewage can be performed in a very rational manner without using a chemical such as a neutralizer.

Further, there is a feature that the system can be operated in a consistent manner by using the treated water obtained by treating the sewage in the immersion filter bed as the clear water. That is, the submerged filter bed, the gap, and the packed bed can be placed in the same tank, but a holding member can be appropriately used so as to maintain the configuration. The holding member can be provided in the lower part of the packed bed, and is provided so that sprinkling water can pass therethrough. Therefore, the packed bed is not in a state of being immersed in water, but preferably has appropriate moisture.

A sewage supply section to be introduced into the submerged filter bed is provided in the gap section, and the sewage is flown down into the submerged filter bed together with the sprinkling water of the deodorizing section by physical filtration and biological treatment. , BOD, SS, etc. in the treated water are removed. The method of supplying the malodorous gas to the packed bed of the deodorizing portion is not particularly limited, and it may be supplied from the gap portion or may be supplied together with the oxygen-containing gas through the immersion filter bed.

The malodorous gas can be introduced from any other source, but in the present invention, it also has an effect of deodorizing the wastewater introduced into the dipping filter bed, so that the malodorous gas is emitted from the device. There is also an advantage that you can suppress life. In the present invention, operating conditions such as the amount of water sprinkled from the water sprinkler installed in the upper part of the packed bed, the amount of oxygen supplied from the oxygen-containing gas supply part installed in the lower part of the submerged filter, the amount of malodorous gas, and the amount of sewage supplied. Is preferably set according to the water quality standard of the target treated water, the offensive odor gas, the type of sewage, and the properties.

Further, it is preferable to use a granular material having a three-dimensional network structure or a granular filter material as the granular material used in the packed bed, the granular filter material used in the dipping filter bed, in order to improve the treatment efficiency. The present invention can be equipped with a known device for cleaning and regenerating the immersion filter bed. The structure and operation of the present invention will be described in detail with reference to FIG.

Reference numeral 1 is a granular filter medium, and 2 is an immersion filter bed composed of the granular filter medium. As the granular filter medium 1 of the immersion filter bed 2 of the present invention, it is preferable to use a granular body having a three-dimensional mesh structure (preferably polyurethane foam) instead of the conventional filter medium such as anthracite. The effect can be obtained. Since the porosity of the filter medium becomes extremely large at 95% or more, the clogging of the filter medium is extremely small.

[0011] With a filter medium such as anthraclast, microorganisms can be retained only on the surface of the filter medium, whereas microorganisms can be retained at a high concentration in a mesh structure inside the filter medium. As a result, the microbial reaction rate is improved. It is possible to completely prevent the filter medium from flowing out of the system. Reference numeral 3 is an oxygen-containing gas for breathing microorganisms, and 4 is a waste water supply unit. Reference numeral 5 denotes a treated water outflow pipe from the immersion filter bed 2.

Next, 6 is a granular material, preferably a granular material having a three-dimensional network structure (for example, polyurethane foam, the same material as the granular filter medium 1 may be used), and 7 is this granular material. Is a packed bed consisting of, which is not immersed in water. Reference numeral 8 is a malodorous gas supply pipe, and the malodorous gas is biologically deodorized by flowing through the packed bed 7 by the pump 9 in an upward flow. 10 is the exhaust gas deodorized.

Numeral 11 is clear water for washing away metabolites of microorganisms (Thiobacillus etc.) immobilized on the packed bed 7 and giving H ₂ O. Utilizing the treated water from the immersion filter bed 2 of sewage. Is preferred. Incidentally, 12 is a pump therefor. Reference numeral 13 is a cleaning water supply pump used when cleaning the submerged filter bed 2. Treated water should be used as cleaning water.

Reference numeral 14 is a washing drainage outflow pipe for the submerged filter bed 2, and 15 is a net for preventing the outflow of the filter material when a three-dimensional mesh structure filter material is used as the granular filter material 1 of the submerged filter bed 2. .. Reference numeral 16 is a gap that separates the packed bed from the submerged filter bed, and 17 is a porous member for holding the packed bed and allowing the sprayed water to pass through.

[0015]

[Action]

 In the present invention, both the treatment of sewage and the offensive odor are appropriately integrated and implemented to improve the treatment effect by the complementary action. First, the malodor generated in the sewage or sludge treatment process of another system or this system is sent through the malodorous gas supply pipe 8 and is introduced together with the oxygen-containing gas 3 into the packed bed 7 arranged on the upper part of the immersion filter bed for deodorization. .. Therefore, the bad odor generated from sewage is not released to the atmosphere.

The bacterial flora involved in deodorization is fixed on the particulate matter 6 by the appropriate bacterial flora naturally growing by the principle of substrate compensation. The inoculum can also be obtained from the lower submerged filter bed 2. Water is supplied to the biological deodorization section consisting of the packed bed 7 to give moisture, but clear water having a low BOD component needs to be used in order to suppress the growth of various bacteria other than the bacteria involved in deodorization. Although tap water or various treated water can be applied to this, this equipment is economical because it can use the runoff water (treated water) from the submerged filter bed.

Further, conventionally, an alkaline agent was administered to neutralize the acidic components (SO _X , NO _X , Cl _X, etc.) trapped in the biological deodorizing portion. No neutralizing agent is required because these are washed by sprinkling clear water. The washed acidic components, bacterial metabolites, adherent substances, and the like are treated in a submerged filter bed provided below. Further, since the inflowing sewage is diluted by the sprinkled water, even in the case of high-concentration sewage, biological treatment in the immersion filter bed 2 can be easily performed.

The present invention, which has a vertically integrated structure, has the effect of saving space and reducing the construction cost, in addition to providing complementary effects in terms of processing as described above.

[0019]

【Example】

 The sewage treatment will be described as an example. However, the application of the present invention is not limited to this. The removed raw sewage is directly supplied to the immersion filter bed in a downward flow. SS and BOD in sewage are removed by filtration and biological action by microorganisms and oxygen retained in the submerged filter bed, and flow out as clear treated water.

On the other hand, the malodorous gas generated from the sludge treatment facility of the sewage treatment plant is supplied from below the packed bed 7 of the granular material (polyurethane foam is suitable) having a three-dimensional network structure, and the malodorous gas is granulated in the upward flow. Touch something. Various microorganisms capable of decomposing malodorous components (H ₂ S, NH ₃ , mercaptan, etc.) are naturally immobilized in a high concentration in the voids inside the three-dimensional network structure granules such as polyurethane foam. Therefore, the malodorous component is biologically decomposed, and the exhaust gas 10 having a significantly reduced odor concentration can be obtained.

The biological deodorizing packed layer 7 is constantly sprinkled with clear water 11 which is a part of the treated water from which sewage has been purified, and the acid component and alkaline component of the packed layer 7 are washed away. For this reason, the neutralizing chemicals used in the conventional method are unnecessary. The biodegradation metabolites and the like produced in the packed bed 7 flow out together with water from the lower part of the packed bed 7, and are biologically treated in the submerged filter bed 2 together with the wastewater supplied from the wastewater supply part 4.

In the present invention, since the space above the submerged filter for biological treatment of wastewater is effectively used, it is not necessary to provide a separate installation space for biological deodorization. When the malodorous gas contains oxygen, the malodorous gas may be supplied not from the malodorous gas supply pipe 8 but from the oxygen-containing gas 3 supply pipe line. Further, when treating the sewage with the submerged filter bed 2, a foul odor of the sewage is generated from the sewage supply part on the submerged filter bed 2. In the present invention, the packing layer 7 for biological deodorization is provided on the top of the submerged filter bed 2. Therefore, the foul odor of dirty water is also deodorized by the packing layer 7.

[0023]

[Effects of the Invention] Since it is possible to completely integrate a sewage treatment device and a malodorous gas treatment device without separately providing them, a large space saving and construction cost reduction effect can be obtained. There is no need for a neutralizing chemical for adjusting the pH of the biological deodorizing section. The odorous gas generated from sewage during sewage treatment will not be released into the atmosphere. No separate water supply to the biological deodorization unit is required. (Tap water, industrial water, etc. are not required.) Since sewage is diluted by water sprinkled for biological deodorization, it can be easily treated with a biological filter bed even when the BOD of sewage is high.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a specific configuration example of the present invention.

[Explanation of symbols]

 1 Granular filter media 2 Immersion filter bed 3 Oxygen-containing gas 4 Sewage supply part 5 Treated water outflow part 6 Granules 7 Packing layer 8 Malodorous gas supply pipe 9 Pump 10 Exhaust gas 11 Clear water 12 Pump 13 Cleaning water supply pump 14 Cleaning drainage Outflow pipe 15 Net 16 Gap 17 Porous member

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[Procedure amendment]

[Submission date] October 7, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (2)

[Scope of utility model registration request] 1. An apparatus comprising a packed bed of granular material on the upper side of a gap and a dipping filter bed of granular filter material on the lower side, wherein clear water is sprinkled from the upper side on the packed layer to carry out the dipping. It is configured such that sewage is made to flow into the filter bed through the gap with the packed bed, while oxygen-containing gas is supplied from the lower part, and malodorous gas is supplied from below the packed bed and / or below the immersed filter bed. Combined treatment device for offensive odor gas and sewage. 2. The combined odorous gas and sewage treatment apparatus according to claim 1, wherein the clear water sprinkled on the packed bed is treated water of the immersion filter bed.