JP3659736B2 - Sewage treatment equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sewage treatment apparatus, in particular, sewage in which all sewage that needs to undergo biological organic matter decomposition and solid-liquid separation is easily treated in a single tank. The present invention relates to a processing apparatus.
[0002]
[Prior art]
Conventionally, in sewage treatment of domestic wastewater, livestock wastewater, industrial wastewater, etc., firstly aerobic treatment of organic matter in sewage in an aeration tank, then this is guided to a precipitation tank, where solid-liquid separation is performed for treatment. doing.
[0003]
[Problems to be solved by the invention]
Since the conventional sewage treatment apparatus uses an aeration tank and a settling basin, the means for transferring from the aeration tank to the settling pond, the sludge scraping means in the settling pond, the activated sludge accumulated in the settling pond to the aeration tank The problem is that a return means is required, the equipment becomes large and complicated, the equipment costs increase, the operation management becomes complicated, and if sewage is continuously introduced, a flow control tank is required in the previous stage. was there.
The present invention solves the problems of the above-described conventional sewage treatment apparatus, consolidates all functions such as organic matter treatment and solid-liquid separation by aeration into one treatment tank, and switches the operation of the aeration stirrer to stop. Provide a sewage treatment device that can switch between an aeration tank and a settling basin in a single tank, and can treat sewage flowing in continuously without the need for conventional transfer means, scraping means, and return means. The purpose is to do.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, a wastewater treatment apparatus of the present invention divides a part of a circulation water channel in a treatment tank in a width direction by a partition wall to form a partition water channel, and each of the partition water channels includes an aeration stirrer. In addition, by placing a weir near each end of each partition water channel and switching the operation of the aeration stirrer, the region partitioned by the weir is used as a settling tank, and the decomposition and solid-liquid separation of organic matter in the continuously flowing sewage Is carried out continuously in a single treatment tank.
[0005]
The sewage treatment apparatus of the present invention having the above-described configuration makes it possible to use an area partitioned by a weir as a sedimentation tank, and performs decomposition and solid-liquid separation of organic substances in the inflowing sewage in a single treatment tank. Therefore, the sewage can be easily treated by omitting the settling tank.
[0006]
In addition, by sequentially switching the aeration stirrer in the partition channel where parallel waste water flows in parallel and stopping and operating, organic matter decomposition and solid-liquid separation are performed continuously in a single treatment tank. Can do.
[0007]
In this case, a supernatant water discharge device can be provided so as to be tiltable along the partition wall.
[0008]
The sewage treatment apparatus according to the present invention having the above-described configuration is disposed in the middle of the partition water channel in parallel with the supernatant water discharge device, and can be tilted to the partition water channel side partitioned by the floating weir. It can function alternately as a settling basin, and the supernatant water can be easily discharged.
[0009]
In this case, the weir can be a floating weir that tilts when the water flow is generated by the operation of the aeration stirrer and becomes open, and stands upright when the aeration stirrer stops.
[0010]
In the sewage treatment apparatus of the present invention having the above-described configuration, the weir is a floating weir that tilts following the aeration stirrer operation in the partition water channel, so that other power is not used. The inside of the partition water channel can be partitioned from the circulation water channel, and the action as a sedimentation basin can be performed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a wastewater treatment apparatus of the present invention will be described with reference to the drawings.
[0012]
In the figure, reference numeral 1 denotes a treatment tank having a circulating water channel 11, which has an oval shape in the illustrated embodiment. A part of the circulating water channel 11 is divided into two partition water channels 11a and 11b by a partition wall 2 disposed in the water flow direction.
[0013]
One or a plurality of aeration stirrers 3 are installed in the circulating water channel 11, and the aeration stirrers 4a and 4b are also installed in the partition water channels 11a and 11b, and the upstream end and the downstream end of the partition water channels 11a and 11b. That is, the floating weirs 5a, 5b, 6a, and 6b are disposed above and below, respectively.
[0014]
The floating weirs 5a, 5b, 6a, 6b are supported by the processing tank wall and the partition wall so that the lower part of the floating weirs can swing. The floating weirs 5a, 5b, 6a, 6b are inclined automatically by the water flow pressure in the partition water channels 11a, 11b. , The pair of front and rear floating weirs 5a, 6a or 5b, 6b are simultaneously tilted by the water flow pressure in the partition water channel in the operation of the aeration stirrers 4a, 4b, and the aeration stirrers 4a, 4b are stopped. Try to stand upright at the same time. When the floating weirs 5a, 6a or 5b, 6b are in the tilted position, the partition water channel is connected to the circulation water channel, and the treated water flows and circulates. On the contrary, when no water flow is generated in the partition channel due to the stop of the aeration stirrer, the upstream floating weirs 5a and 5b are not tilted only by the water flow pressure in the circulation channel, and the upright state is maintained.
[0015]
When the floating weirs 5a, 5b and 6a, 6b are in an upright state, the upper ends of the floating weirs 5a, 5b, 6a, 6b protrude above the water surface as shown in FIG. The treated water in the partitioned water channel that is partitioned is stopped without being circulated, that is, is in a stationary state. In this state, the solid content and moisture in the treated water are separated, and the solid content is precipitated as sludge.
[0016]
In addition, a rotary pipe skimmer-type supernatant water discharge device 7 is provided in the partition wall 2 in which a part of the circulation water channel 11 is disposed at a substantially intermediate position in the water flow direction in the water flow direction. The discharge pipe 8 is connected, and the supernatant water after solid-liquid separation in the partition water channel where the aeration stirrer is stopped is discharged.
[0017]
When the sewage is continuously introduced into the treatment tank 1 of the sewage treatment facility configured as described above and all the aeration stirrers 3, 4 a, 4 b are driven, the circulated water flow into the circulation water channel 11 and the partition water channels 11 a, 11 b All the floating weirs 5a, 5b, 6a and 6b are tilted, and the inflowing sewage circulates in one channel while the organic substances in the sewage are decomposed by a desired aeration. In this case, the entire water channel functions as an aeration tank.
[0018]
When the sewage treatment is completed, when one of the partition water channels 11a and 11b, in the figure, the aeration stirrer 4b on the partition water channel 11b side is stopped, the generation of water flow in the partition water channel 11b is stopped, thereby The floating weirs 5b and 6b change from an inclined state to an upright state, and the inside of the partition water channel 11b functions as a sedimentation tank. As a result, solid-liquid separation is performed by gravity in the partition channel 11b where the water flow is stationary, and the solid sludge settles. The supernatant water is discharged outside the treatment tank by tilting the supernatant water discharge device 7.
[0019]
When one partition water channel 11b is closed by floating weirs 5b and 6b and acting as a settling basin, the aeration stirrer 4a of the other partition water channel 11a is driven, thereby tilting the floating weirs 5a and 6a. The sewage flowing into the water channel 11 is circulated through the water channel.
[0020]
When the sewage of the supernatant water of the partition water channel 11b is finished, when the aeration stirrer 4b of the water channel is driven, the floating weirs 5b and 6b are tilted to be connected to the circulation water channel. And the aeration stirrer 4a in the other partition water channel 11a is stopped. By alternately stopping the aeration stirrers of the parallel partition water channels 11a and 11b in this way, the partition water channels surrounded by the floating weirs on both sides of the upstream and downstream alternately perform the action of the settling basin, and the treated water is stationary. In this partition water channel, sewage circulates and thus continuously treats sewage flowing in continuously.
[0021]
In addition, as shown in the flowchart of FIG. 5, after the supernatant water is drained, the precipitated sludge may be discharged by a sludge discharge device if the amount of precipitated sludge reaches a predetermined amount. This drainage need not be performed every time the supernatant water is drained.
[0022]
【The invention's effect】
According to the sewage treatment apparatus of the present invention described in claim 1, the area partitioned by the weir can be used as a settling tank, and the decomposition and solid-liquid separation of the organic matter in the inflowing sewage are performed in a single treatment tank. Since this is performed in the inside, the sewage can be easily treated by omitting the settling tank.
In addition, by sequentially switching the aeration stirrer in the partition channel where parallel wastewater flows in parallel and stopping and running, organic matter decomposition and solid-liquid separation are continuously performed in a single treatment tank. It can be carried out.
Further, according to the sewage treatment apparatus of the present invention described in claim 2 , since it can be tilted to the side of the partition water channel arranged in the middle of the parallel partition water channels and partitioned by the floating weir, It can function alternately as a settling basin, and the supernatant water can be easily discharged.
Further, according to the sewage treatment apparatus of the present invention described in claim 3 , the weir is a floating weir, and when the aeration stirrer in the partition waterway is stopped, the sewage is tilted following the operation. The inside of the partition water channel can be partitioned from the circulation water channel without using the so that the action as a sedimentation basin can be performed.
[Brief description of the drawings]
FIG. 1 is a plan view showing a first embodiment of a wastewater treatment apparatus of the present invention.
FIG. 2 is an explanatory diagram during aeration and stirring.
FIG. 3 is an explanatory diagram when the aeration stirrer is stopped.
FIG. 4 is a vertical side view of an aeration tank.
FIG. 5 is a flowchart showing the wastewater treatment apparatus of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Treatment tank 2 Partition wall 3 Aeration stirrer 4a Aeration stirrer 5a Floating weir 6a Floating weir 7 Scum skimmer type supernatant water discharge device 8 Drain pipe 11 Circulation water channel 11a Partition water channel 11b Partition water channel

Claims (3)

  A part of the circulating water channel in the treatment tank is divided in the width direction by a partition wall to form a partition water channel, each of the partition water channels is provided with an aeration stirrer, and a weir is arranged near both ends of each partition water channel, the aeration stirrer By switching the operation, the area partitioned by the weir was used as a sedimentation tank, and the decomposition and solid-liquid separation of organic matter in the continuously flowing sewage was performed continuously in a single treatment tank. Sewage treatment equipment characterized by. The sewage treatment apparatus according to claim 1 , wherein a supernatant water discharge device is provided so as to be tiltable along the partition wall. 3. The sewage according to claim 1 , wherein the weir is a floating weir that tilts when the water flow is generated by the operation of the aeration stirrer and is opened, and is closed when the aeration stirrer is stopped. Processing equipment.

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