JPS5843987Y2 - Sewage treatment equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sewage treatment device in a flow regulating tank.

In recent years, a flow rate adjustment tank equipped with a screen room to remove coarse impurities, a settling room, a flow rate adjustment room, etc., a sludge storage tank to regularly remove the stored sludge from the system, and a filter medium and a diffusion tube installed inside. A septic tank that has an aeration tank equipped with a disinfection chamber and a sedimentation tank equipped with a disinfection chamber, etc., each connected through a pipe or the like, and has a single purification function, has been widely used.

This sewage treatment method purifies sewage by attaching and inhabiting the filter medium of an aeration tank with certain microorganisms, supplying dissolved oxygen to these microorganisms, and repeatedly bringing them into contact with each other.This method is easy to maintain and extremely stable. Although it has a high treatment capacity, it has the disadvantage that the filter medium is clogged by foreign substances that pass through the screen and excessive biofilm formed on the filter medium, resulting in a decrease in purification ability.

In order to eliminate the above-mentioned drawbacks, a removal device for removing impurities in wastewater, that is, a fine screen or a spare screen in case the fine screen fails, should be installed separately and connected by piping before the aeration tank. Although this method has been carried out, it also has the following drawbacks.

(1) Since the fine mesh screen, preliminary fine mesh screen, and lean are installed between the flow rate adjustment chamber of the flow rate adjustment tank and the aeration tank, a large installation space is required, and a lot of time is required for maintenance and inspection. At the same time, the work becomes more complicated.

(2) Since the fecal mass is scraped up onto a screen and stored in a basket or the like, odor is generated and becomes a source of pollution.

The present invention was developed in view of the above-mentioned drawbacks, and combines a flow rate adjustment chamber that quantitatively supplies wastewater to an aeration tank, a fine-mesh screen for removing impurities, and a preliminary fine-mesh screen into one. The purpose of this system is to reduce the installation space and facilitate maintenance and inspection by storing foreign matter in a flow rate adjustment tank, and to provide a septic tank that does not generate odors by storing foreign matter in a sludge storage tank.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 5.

Reference numeral 1 designates a flow rate regulating tank having an inflow pipe 2 above the side wall, a sand settling chamber 4 having a screen 3 below the inflow pipe 2, a submersible filth pump 5 at the bottom, and an inspection port 6 at the top.

7 is formed in the flow rate adjustment tank 1 with a partition wall in between, and an aeration tank (
This sludge storage tank has the function of storing return sludge from a tank (not shown) and periodically returning the sludge to the flow rate adjustment tank 1.

8 is fixed below the inspection port 6 of the flow rate adjustment tank 1, and as shown in FIG.
This is a sewage treatment device made of metal or synthetic resin that is roughly divided into a compartment 11° and a third compartment 12.

13, a sewage introduction pipe 14 for introducing sludge from the submersible sewage pump 5 is shown above one end of the first compartment 10;
A return pipe 15 is provided at the bottom for returning excess sludge to the flow rate adjustment tank 1, and a rectifying plate 17 is provided between the side wall 16 and the partition plate 9 to adjust the flow of water, and a gap is further provided to allow a certain amount of sludge to flow out. This flow rate regulating valve is equipped with a metering weir 18 for controlling the flow rate.

Reference numeral 19 is provided in the second compartment 11 adjacent to the first compartment 10, and a U-shaped flow path 20 is formed between the downstream of the flow rate regulating valve 13 of the first compartment 10 and the second compartment 11. Plate 9, 9'
On the flow path 20 side, there is a fine mesh screen 21 that has an upward slope and is partially submerged in the sludge, a motor 22 and its accompanying mechanism (not shown) in the center, and an adjacent tip part that is exposed above the liquid surface. This is a contaminant removal device which has a fine mesh screen 21' having a downward slope and can automatically discharge the contaminants trapped in the fine mesh screen 21 to the adjacent sludge storage tank 7.

For details of the contaminant removal device, see Utility Model Application No. 564029.
(Utility Model Application No. 57-119872).

The third compartment 12 is formed with an opening 23 that communicates with the flow path 20 provided between the first compartment 10 and the second compartment 11. Grooves 24 are provided at both ends of the opening 23 for attachment and detachment. A flexible corner drop 25 is fitted to form a weir and prevent the inflow of sludge.

Further, downstream of the weir, a manual preliminary fine-mesh screen 26 is provided in case the foreign material removal device 19 becomes clogged and maintenance is performed, and downstream of the screen 26, a partition plate 27 is provided at intervals, and a partition plate 27 is provided adjacent to the partition plate 27. On one side, there is an opening 23' provided at both ends with a groove 24' into which the corner cutter 18 can be fitted leading to the downstream part of the impurity removal device 19, and on the other side, the wastewater from which impurities have been removed flows out into the aeration chamber. A drainage portion 29 is formed with an outlet 28 for this purpose.

That is, the sludge in the flow rate adjustment tank 1 flows into the first compartment 10 via the sewage introduction pipe 14 by the submersible sewage pump 5, and the sludge in excess of the necessary amount is returned to the flow rate adjustment tank 1 through the return pipe 15, and then The flow in the first compartment 10 absorbs turbulence in the water flow by the rectifying plate 17, overflows the metering weir 18, flows into the flow path 20, and is guided to the second compartment 11.

On the other hand, the contaminants are retained by the fine mesh screen 21 of the contaminant removal device 19 provided in the second compartment 11, and the contaminants are scraped onto the fine mesh screen 21' by the motor 22 and its accompanying mechanism. The sludge is automatically discharged to the adjacent sludge storage tank 7.

On the other hand, the wastewater from which impurities have been filtered through the fine mesh screen 21 is passed through the opening 23' provided in the partition plate 9' of the third compartment 12.
The wastewater flows into the waste water 29 and then flows out into the air chamber.

The above operation is under normal conditions, but if the fine screens 21, 21' of the contaminant removal device 19 become clogged and maintenance work is performed, the third compartment 12 and the second The corner drop 25 of the weir provided on the border with the compartment 11 is installed in the groove 2.
4, the flow path 2 of the first compartment 10 and the third compartment 12 is removed.
0, and on the other hand, the removed corner drop 25 is drained 2
It is inserted into the groove 24' of the opening 23' provided in the hole 9 to form a weir and shut off water.

Therefore, the sludge that has overflowed the metering weir 18 of the first compartment 10 flows into the second compartment 11, but since the opening 23' is closed, even if the contaminant removal device 19 is removed from the casing 1, the contaminants will not be present. No material can escape through the opening 23' into the aeration tank.

Then, it flows into the second compartment 11 and enters the metering weir 18 and flow path 20.
The sludge that has flowed straight through the opening 23 of the third compartment 12 where the corner passage 25 has been removed flows into the preliminary fine mesh screen 26.
Due to this, foreign matter is trapped and overflows the partition plate 27, resulting in waste water 29
It leaks into the air chamber.

Note that the third compartment may be provided with a contaminant removal device as shown in FIG.

Therefore, in the present invention, the inside of the housing is divided by a partition plate to form a waterway, and the first compartment is equipped with a flow rate adjustment tank equipped with a sewage inlet pipe, a return pipe, a rectifying plate, and a metering weir, and the second compartment is equipped with a flow rate regulating tank equipped with a wastewater introduction pipe, a return pipe, a rectifying plate, and a metering weir. The sewage treatment system is equipped with an automatic fine-mesh screen in the second compartment and a preliminary fine-mesh screen in the third compartment, and is installed in the flow rate adjustment tank below the inspection port, resulting in the following effects. .

(1) Since the contaminant removal device is not installed outside the flow rate adjustment tank, the installation space can be reduced and maintenance and inspection can be easily done in one place.

(2) Since foreign matter can be automatically discharged into the sludge storage tank, no foul odor is generated.

[Brief explanation of drawings]

FIG. 1 is an external cross-sectional view showing an embodiment of the present invention, FIGS. 2 and 3 are schematic plan views showing an embodiment of the present invention, and FIG.
XX sectional view of the figure, and FIG. 5 is a plan view showing another embodiment of the present invention. Explanation of symbols 1...Flow rate adjustment tank, 2...
・Inflow pipe, 3...Screen, 4...
Sediment chamber, 5... Submersible sewage pump, 6...
・Inspection port, 7...Sludge storage tank, 8...
Sewage treatment equipment, 9.9'... Partition plate, 10...
...First compartment, 11...Second compartment, 1
2...Third compartment, 13...Flow rate adjustment box, 14...Sewage inlet pipe, 15...Return pipe, 16...・Side wall, 17... Current plate, 18... Metering weir, 19... Contaminant removal device, 20... Channel, 21.21'. ...
...Fine eyes Suffu IJ. 22...Motor, 23.23'...
...Opening, 24.24'...Groove, 25...
... Corner drop, 26 ... Preliminary fine mesh screen, 27 ... Partition plate, 28 ... Outlet,
29... Drain valve.

Claims (1)

[Scope of utility model registration request] The interior of the container made of synthetic resin, metal, etc. is divided by a partition plate, and the sludge from the metering weir is introduced into the first compartment, which is a flow rate adjustment valve equipped with a sewage inlet pipe, return pipe, rectifier plate, and metering weir. A second compartment equipped with a foreign matter removal device for mooring and discharging foreign matter, and a foreign matter removal device approximately in the center, which has a removable opening that communicates with the first and second compartments at the front. A sewage treatment system is constructed of a third compartment, in which a wastewater part is formed with an outflow port by a partition plate behind it, and a removable opening is provided between the wastewater part and the second compartment. 1. A sewage treatment device, which is located below an inspection port of the sewage treatment device, and discharges foreign matter moored to a foreign matter removal device into a sludge storage tank.