JPH05228481A - Device for processing hardly biodegradable substance - Google Patents

Abstract

PURPOSE:To ensure that an organic chlorine compound does not generate without the use of active carbon by making an untreated water flow direction the same as a direction where ozonized air becomes afloat in the untreated air and providing a parallel flow ozone reaction part for allowing the untreated water to come into contact with the ozonized air. CONSTITUTION:A parallel flow ozone reaction part 1 as one of the components of the objective device works to allow an untreated water to come into contact with an ozonized air by making an untreated water 4 flow direction the same as a direction where the ozonized air becomes afloat in the untreated water. In addition, an ozone radical reaction part 2 which accelerates an oxidation reaction at high efficiency by using at least one of a hydrogen peroxide injection part 2A, an ultraviolet lamp 2B, an ultrasonic generator 2C or a catalyst 2D is provided in the downstream side of the ozone reaction part 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment apparatus for biologically difficult-to-decompose substances for performing water treatment such as wastewater treatment, landfill leachate treatment, photographic development wastewater treatment, etc. It is about.

[0002]

2. Description of the Related Art As a water treatment method, for example, organic matter in treated water is decomposed by an activated sludge treatment method, and nitrogen compounds in the treated water are converted to inactive nitrogen gas and removed by a biological nitrogen removal method. is doing. However, biologically persistent organic substances that do not decompose by living organisms (hereinafter referred to as biologically persistent substances) such as organic compounds having an olefin double bond, benzene derivatives, and aliphatic compounds remain in the treated water. ing. Therefore, conventionally, a method of physically adsorbing activated carbon by using activated carbon has been used as a method of removing these biodegradable organic substances. Further, conventionally, chlorine sterilization was performed when necessary at the final stage of biological water treatment.

[0003]

However, in the activated carbon adsorption treatment, since the adsorption power gradually decreases, it is necessary to regenerate or replace it with new carbon, which increases the running cost of the entire treatment. There was a problem. Further, there is a problem in that the use of chlorine for chlorine sterilization causes a disadvantage that an organic chlorine compound is generated.

The present invention has been made in order to solve such conventional problems, and an object thereof is to provide a treatment apparatus for a bio-degradable substance which does not use activated carbon and does not produce an organic chlorine compound. I am trying.

[0005]

In the apparatus for treating a biodegradable substance according to the present invention, the raw water and the ozonized air are brought into contact with each other so that the flowing direction of the raw water and the floating direction of the ozonized air are in the same direction. A co-current type ozone reaction unit is provided, and an ozone radical reaction unit that promotes the oxidation reaction with high efficiency by using at least one of a hydrogen peroxide injection unit, an ultrasonic generator, an ultraviolet lamp, and a catalyst is provided downstream of the ozone reaction unit. It is provided on the side.

[0006] The apparatus for treating a biodegradable substance according to the present invention comprises:
It is equipped with a biological reaction tank for biological treatment of raw water flowing out from the ozone radical reaction section.

[0007]

In the above structure, since the direct reaction of ozone molecules is predominant in the ozone reaction part, the ozone blown into the raw water comes into contact with the raw water, and the biodegradable substance in the raw water, for example, the olefin double bond. It directly reacts with an organic compound having benzene, a benzene derivative, an aliphatic compound, etc. to oxidize and decompose these organic substances.

In the downstream of the ozone reaction section, the direct reaction of ozone molecules is reduced, the OH radical reaction becomes dominant, and the strong oxidizing power oxidatively decomposes the remaining organic compounds other than the above. Therefore, in the ozone radical reaction part, at least one of injection of hydrogen peroxide, ultrasonic wave emission, ultraviolet ray irradiation, and contact with a catalyst is used to promote the radical reaction with high efficiency. In particular, the catalyst has the action of promoting the ozone radical reaction and of decomposing and removing the residual hydrogen peroxide.

In the ozone reaction part and the ozone radical reaction part, the bio-degradable substance is changed into a bio-degradable substance, and in the bio-reaction tank, the bio-degradable substance is biologically treated with microorganisms to decompose and remove it.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG.
Will be described with reference to. FIG. 1 is a schematic diagram of a treatment apparatus for a bio-degradable substance according to the first embodiment. In this figure, 1 is a co-current type ozone reaction section (hereinafter, simply referred to as ozone reaction section). An ozone radical reaction unit 2 is provided downstream of the ozone reaction unit 1, and a biological reaction tank 3 is provided downstream of the ozone radical reaction unit 2.

The ozone reaction part 1 is constructed so that raw water 4 flows in from the lower part, flows out from the upper part, and flows into the upper part of the ozone radical reaction part 2. Further, at the bottom of the ozone reaction part 1, a blowing part 1 for blowing ozonized air.
A is provided and ozonized air is blown into the raw water.
The ozonized air and the raw water 4 move upward in the ozone reaction unit 1.

An injection unit 2A for injecting hydrogen peroxide (H ₂ O ₂ ) is provided above the ozone radical reaction unit 2.
Hydrogen peroxide has a function of oxidizing itself and decomposing bio-hardly-degradable substances, and also has a function of activating the OH radical reaction of ozone.

A UV lamp (ultraviolet lamp) 2B is provided below the hydrogen peroxide injection section 2A.
An ultrasonic generator 2C that generates ultrasonic waves is provided below B. These UV lamp 2B and ultrasonic generator 2C
Has a function of promoting the OH radical reaction of ozone.

A catalyst packing layer 2D is provided below the ultrasonic generator 2C and is filled with a catalyst. This catalyst uses, for example, alumina whose surface is treated with platinum or palladium, and has the function of promoting the OH radical reaction of ozone and decomposing and removing the residual dissolved ozone and hydrogen peroxide.

The biological reaction tank 3 is a treatment tank using a microorganism which is a well-known technique, and is a biologically easily decomposable substance obtained by oxidatively decomposing a hardly biodegradable substance by the ozone reaction part 1 and the ozone radical reaction part 2. Are further decomposed by microorganisms. The raw water treated in the biological reaction tank 3 is discharged or returned to the ozone reaction section 1 again depending on the degree of decomposition.

Next, the operation of the above configuration will be described. In the ozone reaction part 1, the ozone blown out from the ozone blowing part 1A comes into contact with the raw water 4, and the biodegradable substance in the raw water 4, for example, an organic compound having an olefin double bond,
Ozone molecules directly react with benzene derivatives, aliphatic compounds, etc., and oxidatively decompose bio-hardly-degradable substances.

Furthermore, in the ozone radical reaction section 2 downstream of the ozone reaction section 1, the direct reaction of ozone molecules is reduced and the OH radical reaction becomes dominant, and the remaining organic compounds other than those mentioned above are oxidatively decomposed. This OH radical reaction has a strong oxidizing action, and the reaction is further promoted by using a catalyst and the like together. Therefore, the ozone radical reaction unit 2 promotes the OH radical reaction with high efficiency by using at least one of hydrogen peroxide injection, ultraviolet irradiation, ultrasonic emission, and contact with a catalyst. In particular, the catalyst has the function of promoting the OH radical reaction and decomposing and removing the residual hydrogen peroxide. The position, order, and necessity of the ozone blowout section 1A, the injection section 2A for injecting hydrogen peroxide, the UV lamp 2B, the ultrasonic generator 2C, and the catalyst filling layer 2D vary depending on the quality of the raw water.

Further, the biologically hardly decomposable substance is changed into a biologically easily decomposable substance by the ozone reaction part 1 and the ozone radical reaction part 2, and this easily biodegradable substance is guided to the biological reaction tank 3 to be biologically activated by microorganisms. It is decomposed and removed. The raw water 4 treated in the biological reaction tank 3 is returned to the ozone reaction section 1 again depending on the degree of decomposition and the above cycle is repeated a plurality of times, or the ozone reaction section 1, the ozone radical reaction section 2, and the biological reaction tank 3 are set in multiple stages. Provide and disassemble and remove until the target value is reached.

FIG. 2 shows a second embodiment of the present invention. In the apparatus for treating a biodegradable substance of the second embodiment, ozone in which an ozone reaction section 11A and an ozone radical reaction section 11B are integrated with each other is used. It is composed of a reaction tank 11 and a biological reaction tank 13 provided downstream of the ozone reaction tank 11.

The ozone reaction tank 11 is provided with a blow-out portion 11a for blowing out ozonized air at its lower part, and the ozonized air is blown into the raw water 14. An injection part 11b for injecting hydrogen peroxide is provided above the blowing part 11a, and a UV lamp 11c is provided above this injection part 11b. Furthermore, an ultrasonic wave generator 11d that generates ultrasonic waves is provided above the UV lamp 11c.
A catalyst filling layer 11e is provided on the upper portion of d, and is filled with the catalyst.

In this second embodiment, the ozone reaction section 11A is used.
The ozone radical reaction unit 11B is integrated with the ozone radical reaction unit 11B, and the direction of the raw water 14 flowing through the ozone radical reaction unit 11B is downward in the first embodiment, whereas it is upward in the second embodiment. Except for certain points, the operation and the like are the same as those in the first embodiment. Since the biological reaction tank 13 is the same as that of the first embodiment, its details are omitted.

Although the reaction section is a single tube, the reaction section may be of a double tube type, and the structure thereof is not limited to that of the above embodiment.

[0023]

As described above, according to the present invention, at least one of injection of hydrogen peroxide, ultrasonic emission, irradiation of ultraviolet rays, and contact with a catalyst is used in combination to oxidize a hardly biodegradable substance into ozone. Since the reaction can be decomposed with high efficiency, the treatment can be performed without using activated carbon, and the running cost for the whole treatment can be kept low. Further, the easily biodegradable substance can be efficiently treated in the biological reaction tank, and since chlorine sterilization is not performed, an organic chlorine compound is not generated.

[Brief description of drawings]

FIG. 1 is a schematic view of a hardly biodegradable substance according to the first embodiment of the present invention.

FIG. 2 is a schematic view of a hardly biodegradable substance according to the second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ozone reaction part 1A Ozone blowing part 2 Ozone radical reaction part 2A Hydrogen peroxide injecting part 2B UV lamp (ultraviolet lamp) 2C Ultrasonic generator 2D Catalyst filling layer 3 Biological reaction tank 4 Raw water 11A Ozone reaction part 11B Ozone radical reaction part 11a Ozone blowing part 11b Hydrogen peroxide injecting part 11c UV lamp (ultraviolet lamp) 11d Ultrasonic generator 11e Catalyst packing layer 13 Biological reaction tank 14 Raw water

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location C02F 9/00 Z 8515-4D

Claims (2)

[Claims] 1. A parallel flow type ozone reaction part for contacting raw water and ozonized air is provided with the flowing direction of raw water and the direction in which the ozonized air floats in the raw water being the same direction, a hydrogen peroxide injection part, and an ultrasonic wave. At least one of generator, UV lamp and catalyst
An apparatus for treating a biodegradable substance, characterized in that an ozone radical reaction part for promoting the oxidation reaction with high efficiency is provided on the downstream side of the ozone reaction part. 2. The apparatus for treating a biodegradable substance according to claim 1, further comprising a bioreaction tank for biologically treating the raw water flowing out from the ozone radical reaction section.