JP2000024680A - High temperature and aerobic treatment of organic matter and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To treat much org. waste water in a short time by spraying an org. matter at an upper part in a reaction tank, aerating the sprayed org. matter by supplying heated air at a lower part in the reaction tank to form gas and removing the gas from the reaction tank. SOLUTION: The air heated to about 60 deg.C by a heating means 7 is supplied into a reaction tank 1 by interposing a fixed delivery pump 8 and a supply means or a jet nozzle 9 arranged at the bottom part of the reaction tank 1. Then the raw water sprayed from a raw water spraying pipe 5 is heated with the supplied heated air from the jet nozzle 9 and stirred to form bubbles and to float in the reaction tank 1, and the org. matter is subjected to high temp. and aerobic treatment by allowing the surface of the bubbles to perform a role of dwelling of microorganisms. As the result, the formed gas such as carbon dioxide is discharged from an upper end open port 3 after deodorizing. In this way, a large amount of org. waste water can be treated in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for high-temperature, aerobic treatment of organic substances, and more particularly to a method and an apparatus for treating high-concentration organic waste liquid by a high-temperature, aerobic method.

[0002]

2. Description of the Related Art High-concentration organic wastewater includes night soil, food industry wastewater, brewery wastewater, livestock manure, and concentrated sludge.
Conventionally, aerobic treatment such as an activated sludge method has been performed on highly concentrated organic wastewater after dilution. This method requires a large amount of dilution water, and the activated sludge treatment is expensive in terms of electric power and the like, and generates a considerable amount of excess sludge.

[0003] For this reason, after absorbing high-concentration organic wastewater into a suitable carrier, air is supplied to completely decompose organic substances into carbon dioxide. A high-temperature, aerobic treatment method for evaporating water is used.

FIG. 2 shows such a treatment method and apparatus. 1 is a reaction tank having a heat insulating structure having a height of, for example, 2200 mm and an inner diameter of 2000 mm. Suitable as a habitat, inexpensive, and difficult to biodegrade, such as wood,
Carriers such as charcoal, activated carbon and zeolites, sawdust, rice cake, etc., 3 is an opening provided at the upper end of the reaction tank 1 for exhausting products such as carbon dioxide, 4 is a lower end opening for drain water discharge, and 5 is the above. A pipe for dispersing raw water such as organic waste liquid disposed at the upper part in the reaction tank 1 and an air jetting pipe 6 disposed at the lower part.

[0005] In such a processing method and apparatus, the carrier 2
The raw water is supplied into the carrier 2 via the raw water spray pipe 5 while stirring the raw water by a mechanical drive type stirring means (not shown). The organic matter in the water is decomposed while maintaining the fermentation temperature at about 60 ° C.

[0006]

However, in the above-described conventional high-temperature, aerobic treatment method and apparatus, the volume of the carrier 2 needs to be about 15 to 20 times that of the raw water to be treated. There was a disadvantage that it had to be large.

As a result of various experiments and studies, the present inventor has found that the organic matter in the raw water can be fermented in the reaction tank 1 by aeration and mixing and stirring of the raw water in the reaction tank 1 without using the carrier 2. I found it.

The present invention has been made based on such findings.

[0009]

The organic substance of the present invention has a high temperature,
The aerobic treatment method includes a step of spraying organic matter in the upper part of the reaction tank, a step of supplying heated air to a lower part of the reaction tank to aerate the sprayed organic matter, and removing generated gas from the inside of the reaction tank. And a step of performing

The high-temperature, aerobic treatment apparatus for organic matter according to the present invention comprises:
A reaction tank, an opening provided in the reaction tank for discharging a product generated in the reaction tank, an organic substance spraying means and a heating air supply means or jet ejection disposed at an upper and a lower part in the reaction tank. Means.

Further, the high-temperature, aerobic treatment apparatus for organic substances according to the present invention is characterized in that the apparatus further comprises means for controlling the temperature of the heated air in accordance with the temperature in the reaction chamber.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

In the present invention, as shown in FIG. 1, the conventional carrier 2 and its mechanically driven agitating means and air blowing tube 6 are not used, and instead, air heated to about 60.degree. 8 and the supply means arranged at the bottom of the reaction tank 1 or the jet nozzle 9 to feed the reaction tank 1 into the reaction tank 1 and degas the resulting gas such as carbon dioxide. I do.

The heating means 7 includes a container 10 having a heat insulating structure.
And a blower 1 for introducing outside air into the container 10.
1 and the air in the container 10 sucked by the suction fan 12 which is activated when the temperature in the reaction vessel 1 becomes 60 ° C. or less and stopped when the temperature in the reaction vessel 1 becomes 70 ° C. or more.
The heat exchanger 13 is heated to 70 ° C. and returned into the container 10.

As a heat source of the heat exchanger 13, unused heat energy such as residual heat of incineration of garbage and waste heat of hot springs is preferable from the viewpoint of effective utilization of resources.

Reference numerals 14 and 15 denote an exhaust fan and a deodorant inserted between the upper portion of the reaction tank 1 and the upper end opening 3, respectively, 16 a raw water receiving tank, and 17 and 18 a raw water receiving tank 16 respectively. The constant flow pump and the stirring means arranged.

Since the method and apparatus for high temperature and aerobic treatment of organic matter of the present invention are as described above, the raw water sprayed from the raw water spray pipe 5 is heated in the reaction tank 1 by the heated air from the jet nozzle 9. The foam is agitated and floats in the reaction tank 1, and the surface of the foam plays a role of a house for microorganisms and is subjected to high-temperature aerobic treatment.

In the present invention, it is preferable to appropriately control the amount of air discharged from the jet nozzle 9 in order to prevent the inside of the reaction tank 1 from being filled with the foam.

[0019]

As described above, according to the present invention, a large amount of organic wastewater can be treated in a short time without using a conventionally used carrier. There is a great advantage that a stirrer is not required.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a high-temperature, aerobic treatment method and apparatus of an organic substance according to the present invention.

FIG. 2 is an explanatory view of a conventional high-temperature, aerobic treatment method and apparatus for organic substances.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reaction tank 2 Carrier 3 Upper end opening 4 Lower end opening 5 Raw water spraying pipe 6 Air ejection pipe 7 Heating means 8 Pump 9 Jet nozzle 10 Container 11 Blower 12 Suction fan 13 Heat exchanger 14 Exhaust fan 15 Deodorant 16 Raw water receiving tank 17 Constant Flow pump 18 Stirring means

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Norio Aragaki 1534, 4-ku, Nishi-Nasuno-cho, Nasu-gun, Tochigi Prefecture F-term in Penta Techno Service Co., Ltd. 4D028 AA03 AB03 BC01 BD00 BD02 CA10 CB03 CD01 4D059 AA01 AA30 BA03 BA56 CA16 EA20 EB10

Claims (4)

[Claims] 1. A step of spraying an organic substance in an upper part of a reaction tank, a step of supplying heated air to a lower part of the reaction tank to aerate the sprayed organic substance, and removing generated gas from the inside of the reaction tank. And a high-temperature, aerobic treatment method for an organic substance. 2. A reaction tank, an opening provided in the reaction tank for discharging a product generated in the reaction tank, an organic substance dispersing means and heating air disposed in upper and lower parts of the reaction tank. A high-temperature, aerobic treatment apparatus for organic matter, characterized by comprising supply means. 3. A reaction tank, an opening provided in the reaction tank for discharging a product generated in the reaction tank, an organic substance dispersing means and heating air disposed in upper and lower parts of the reaction tank. A high-temperature, aerobic treatment apparatus for organic matter, comprising jet ejection means. 4. The high-temperature aerobic treatment apparatus for organic matter according to claim 2, further comprising means for controlling the temperature of said heated air in accordance with the temperature in said reaction chamber.