JPH06142641A - Sewage processing method - Google Patents

Abstract

PURPOSE:To efficiently execute an incineration processing by suppressing effectively foaming. CONSTITUTION:Sewage is led in from a sewage inlet 1a in the upper part of a kettle 1, a stirring machine 3 is driven, and when a prescribed water level is detected by a water level detector 6, the sewage is heated, and when a prescribed foaming quantity is detected, heating is stopped, a first defoaming agent is injected before or after foaming, and when foam is roughly annihilated, a second defoaming agent is injected, the sewage is heated again, and thereafter, in the same way, heating and a heating stop by detecting foaming are repeated, and when foaming ceases to occur, heating is continued.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wastewater treatment method.

[0002]

2. Description of the Related Art Heretofore, there has been incineration as one of the techniques for treating human and animal manure and wastewater such as wastewater discharged from the kitchen.

[0003]

However, in the incineration process, sewage foams and overflows during concentration, pollutes the surroundings, emits a foul odor, and causes significant environmental pollution. Therefore, the incineration process is performed in an inefficient state such that foam overflow does not occur.

An object of the present invention is to solve the above problems and to provide a method capable of effectively suppressing foaming and incinerating efficiently.

[0005]

In order to solve the above problems, the structure of the present invention is as follows. That is, the first configuration is to introduce sewage from the sewage inlet at the top of the kettle, drive the agitator, and heat the sewage when a constant water level is detected by the water level detector, and stop heating when a constant amount of foaming is detected. Then, the first defoaming agent is injected before or after foaming, and heated again when the foam almost disappears. In the same manner, heating and stop of heating by foaming detection are repeated, and when foaming disappears, heating is continued. It is to let.

The second configuration is to introduce sewage from the sewage inlet at the top of the kettle, drive the agitator, and heat the sewage when a constant water level is detected by the water level detector, and heat the sewage when a constant foaming amount is detected. Stop, inject the first antifoaming agent before or after foaming, inject the second antifoaming agent when the bubbles are almost extinguished, heat again, and repeat the heating and stop heating by foaming detection in the same manner. , When the bubbling is gone, continue heating.

[0007]

[Function] Foaming is suppressed and incineration can be performed efficiently.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below based on an embodiment shown in the drawings. An electric heater 2 is provided directly below a pot 1 having a sewage inlet 1a and an odor outlet 1b in the upper part, and a blade 3a of a stirrer 3 is provided in the lower part of the pot 1, and its rotating shaft 3b extends upward to penetrate the pot lid. And then project outside,
That portion is connected to the motor 5 via the gear 4.
An electrode type water level detector 6 and an electrode type bubble detector 7 are provided on the top of the pot. An antifoaming agent injecting means including a solenoid valve 11 and a medicine header tank 12 is connected to the upper portion of the pot.

An embodiment of the present processing method will be described above. Introduce sewage from the sewage inlet 1a at the top of the pot 1,
While the stirrer 3 is driven, the electromagnetic valve 11 is opened for 30 seconds by a timer to inject the first defoaming agent composed of a defoaming agent having a large foam breaking property. After that, when a constant water level is detected by the water level detector 6, the nichrome wire sheathed heater 2 is energized to heat the dirty water with red heat. The upper surface of the generated bubbles rises and at the set height,
When the bubble detector 7 detects a certain amount of foam, the heating of the heater 2 is stopped for 3 minutes by a timer with a signal from the detector. This almost eliminates the bubbles.

Next, a second antifoaming agent consisting of an antifoaming agent having a large dilution stability and high temperature stability was used for 30 seconds with a timer for a solenoid valve 11
Is opened and injected, and the heater 2 is energized again to heat with red heat. In the same manner, the heating and the heating stop by the foaming detection are repeated, and when the foaming is stopped, the heating is continued for several hours. This causes the solid matter to ignite spontaneously and burn.
The high temperature at this time is sensed and the energization of the heater 2 is stopped.

Experimental Example Pot size: diameter 50 cm, height 20 cm Treated product: human excrement and urine 10 kg in total First defoaming agent: injection amount 1 g, before first heating of heater Second defoaming agent: injection amount 0 0.5g, Immediately after the first heater heating stop Heater heating / heating stop time (minutes) First heating 30 minutes, stop 2 minutes Second heating 2 minutes, stop 3 minutes Third heating 2 minutes, stop 3 Minute 4th heating 2 minutes, stop 3 minutes Processing time: Time from injection of the first antifoaming agent to completion of heating 3 hours 30 minutes Processing time of conventional technology: 6 hours 30 minutes.

The injection of the second defoaming agent can be omitted depending on the condition of the treated material. Also, the first defoamer is injected before or after foaming.

The heating means may be combustion by a petrochemical fuel such as gas or petroleum.

The present invention is not limited to the examples and embodiments described above, but includes various modifications without departing from the spirit and scope of the claims.

[0015]

With the constitution of the present invention, incineration can be performed with extremely high efficiency.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

[Explanation of Codes] 1 ... Kettle 1a ... Sewage inlet 1b ... Odor outlet 2 ... Heater 3 ... Stirrer 3a ... Blade 3b ... Rotating shaft 4 ... Gear 5 ... Motor 6 ... Water level detector 7 ... Foam detector 8 ... Odor duct 9 ... Deodorizing burner 10 ... Oil tank 11 ... Solenoid valve 12
… Drug head tank

Claims (2)

[Claims] 1. Introducing sewage from the sewage inlet at the top of the kettle,
When the agitator is driven and the water level detector detects a constant water level, the sewage is heated, and when a constant foaming amount is detected, the heating is stopped, and the first defoaming agent is injected before or after foaming, and the bubbles are almost eliminated. A method for treating sewage, which comprises heating again when it disappears, repeating heating and stopping heating by foaming detection in the same manner, and continuing heating when foaming disappears. 2. Introducing sewage from the sewage inlet at the top of the kettle,
When the agitator is driven and the water level detector detects a constant water level, the sewage is heated, and when a constant foaming amount is detected, the heating is stopped, and the first defoaming agent is injected before or after foaming, and the bubbles are almost eliminated. A second method for treating sewage, which comprises injecting a second antifoaming agent when it disappears, heating it again, repeating heating and stopping heating by foaming detection in the same manner, and continuing heating when foaming disappears.