JPS588399Y2 - Sewage treatment equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a sewage treatment device for domestic wastewater, etc.

In recent years, construction of housing complexes, academic cities, regional development, tourism development, etc. have been rapidly progressing, and since these development areas are located outside the public sewerage area, the need for small-scale sewage treatment facilities has increased. On the other hand, there is a growing momentum to build treatment facilities for domestic wastewater, etc. in rural areas, fishing villages, etc. due to strong demands for environmental conservation.

However, conventional sewage and other sewage treatment facilities are large-scale, making them unsuitable for small rural communities.
There is a demand for the development of equipment that can be easily transported and installed.

This invention was made to provide a sewage treatment facility that meets the above-mentioned demands, and will be described in detail below based on drawings showing the structure of an embodiment.

In the drawing, the treatment tank 1 is formed into a substantially box shape, and one of the bottom corners of the tank is diagonally cut out on the sewage inlet 2 side, and the tank bottom plate 1B is inclined toward the cutout 1A. A sludge sedimentation accumulation area C is formed so that sludge sedimentation and accumulation occurs.

In this treatment tank 1, in the order of the sewage treatment process, there are formed an agitation and mixing zone A where the sewage inlet 2 opens, a floc flocculation separation zone B, a sludge sedimentation accumulation zone C1, a clarification zone D, an aeration zone E, and a filtration zone F. has been done.

The stirring and mixing area A is defined above the processing tank 1 by the bottom plate 3 and the side wall plates 4A and 4B, and the stirring and mixing area A is defined by the stirring and mixing screw 5.
The screw 5 is mounted on a shaft via a bearing 6, and the screw 5 is connected to an output shaft 8 of a motor I via a universal joint 9 or the like.

In addition, 10 is a wastewater inflow pipe, and 11 is a water level detector.

The floc flocculation separation zone B is divided by a clarification zone and a slightly inclined wall plate 12, and a plurality of solid-liquid separation plates 13 for separating flocs and water are alternately tilted in opposite directions.
Furthermore, the walls are fixed so that the wastewater flows down in a zigzag pattern from top to bottom.

A sludge sedimentation accumulation area C is formed between the lower end of the wall plate 12 and the bottom plate 1B, and the sewage that has flowed down to this area rises again to a clear area, and this clear area is located near the bottom plate. It is divided into an aeration area E and a drainage area F by a partition plate 14 whose lower end is fixed to 1B.

Approximately two-thirds of the lower part of the clarification area is loaded with a floc settling body 16 in which a large number of narrow upward flow channels 15 are formed, so that the flocs rising together with the sewage will settle. As the floc sedimentation body 16, a bundle of a large number of small-diameter tubes, or a tube-shaped tube as shown in FIG. 3 is adopted.

Further, an overflow guide plate 17 is fixed to the upper edge of the partition plate 14, and the clear water overflows and falls, comes into contact with air in the aeration area E, and is further purified.

&J gutter-shaped exposed water receiving trough 18 in the part where clear water falls
is removably attached, and the aeration water flows from the aeration water intake pipe 19 provided on the rear wall 1D of the treatment tank 1, through the valve 20, the water supply pipe 21, and the valve 22, and then the aeration water is again provided below the retreat area F. The intake pipe 23 is guided inside the tank 1.

The filtration zone F is located below the trough 18 and is formed by a perforated or drainboard-shaped support frame 24 provided with a predetermined gap above the bottom plate 1, and a furnace material 25 provided thereon. It is configured.

The intake pipe 23 is connected to the bottom plate 1 at the lower end of the tank side wall 1E.
It is provided so as to open between B and the support frame 24.

Further, a treated water discharge pipe 26 that opens upward above the furnace material 25 is attached to the lower part of the tank side wall 1E,
This drain pipe 26 is connected to the treated water discharge pump 2 outside the tank 1.
It is connected to the suction port of T.

Furthermore, a ◆ eastern water treatment discharge pipe 28 is connected to the discharge port of the treated water discharge pump 2T, so that the treated water is discharged into a waterway or the like.

In addition, 29 is a sludge discharge pipe provided on the side wall of the sludge storage and accumulation area CQ treatment tank 1, 30 is a sludge discharge pump,
31 is a drain plug or cock provided on the lower side wall of the support frame 24 of the filtration area F; 32 is a level switch;
3 is a control box.

According to the sewage treatment apparatus according to this invention, sewage is led from the inflow pipe 10 to the stirring and mixing zone C of the treatment tank 1, where the sewage and solids suspended therein are stirred and mixed by the screw 5. The flocs in the wastewater flow over the side wall plate 4A and sequentially flow downward on the solid-liquid separation plate 113 in the floc coagulation separation area B, where the flocs in the wastewater are coagulated and separated, and deposited on the bottom plate 1B in the sludge sedimentation accumulation area C. do.

Furthermore, the wastewater ascends the floc sedimentation body 16 to reach the upper part of the clearing area, but while rising in the narrow upward flow path 15, the residual flocs in the wastewater separate and settle, causing the floc sedimentation accumulation area C. The clarified wastewater flows down from the overflow guide plate 17, reaches the aeration water receiving trough 18, and is aerated by coming into contact with the atmosphere during overflow falling.

The aerated water on the trough 18 is transferred from the take-out pipe 19 to the valve 2.
0, is led into the tank 1 again from the intake pipe 23 via the water pipe 21 and the valve 22, passes through the support frame 24, and the furnace material 25
The treated water passes through the furnace material 25 and reaches above it, and the fine suspended matter is removed and rendered harmless by the furnace material 25.
It is sucked out by the discharge pump 2γ and discharged into waterways etc. through the discharge pipe 28.

Then, the sludge is guided from the discharge pipe 29 to a predetermined location outside the treatment tank 1 by the pump 30 and is appropriately treated.

Furthermore, when the amount of fine suspended matter adsorbed to the furnace material 25 through the holes in the support frame 24 increases, the furnace material 25 is cleaned by opening the drain plug or plug 31 to allow the flow to flow back. Can be done.

The aeration water take-out pipe 19 is used as a backwash water outlet pipe, the intake pipe 23 is used as a backwash water inlet pipe, and the opening of the treated water discharge pipe 26 is located in the space below the support frame 24. Water can be passed from above to below the p-material 25, and at this time, by positioning the water level in the filtration zone F above the upper edge of the trough 18, fine suspended matter separated and floated from the furnace material 25 can be removed. into the trough 18 and pipe 19
The drain plug 31 can be opened in the same way as described above to take it out of the processing tank 1 and process it separately.

In this way, the filtration area F can be modified in various ways, and furthermore, the floating matter discharged from the drain plug 31 is guided to the wastewater inflow pipe 10, and is coagulated and separated together with flocs in the treatment tank 1 again, and is discharged as sludge. be able to.

The sewage treatment system according to this invention is compactly arranged and configured in one treatment tank as described above, so it can be used as a small-scale facility for small villages or households located outside the public sewerage area. It is the most suitable, easy to transport and install, and flocs in wastewater can be separated and settled in the flocculation and separation zone and the clarification zone and accumulated, and the aeration zone provides good oxygen dissolution efficiency. In addition, it is possible to efficiently perform high-quality advanced treatment that meets discharge acceptance standards in a rational and hygienic manner by removing even minute suspended matter through the filtration zone, and is relatively inexpensive, helping to prevent pollution and protect the environment. As something that has made a huge contribution to the world, we have high hopes for its effects.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a plan view, FIG. 2 is a vertical sectional view taken along line A-A in FIG. 1, and FIG. 3 is a partial top view showing another example of the sediment. It is. 1...Treatment tank, 2...Sewage inlet, 10
... Sewage inflow pipe, 13 ... Solid-liquid separation plate, 15 ... Narrow upward channel, 16 ... Sedimentation body, 1T ... ...Overflow information board, 25...
F material, 26... Treated water discharge pipe, A...
Stirring mixing zone, B...Clock coagulation separation zone, C...
...Sludge sedimentation accumulation area, D... Clear area,
E: Aeration area, F: Filtration area.

Claims (1)

[Scope of utility model registration request] A sewage treatment device in which a stirring and mixing zone, a flocculation separation zone, a sludge sedimentation accumulation zone, a clarification zone, an aeration zone, and a filtration zone are formed in a treatment tank, the stirring and mixing zone being formed above the flocculation zone, A clarification area in which a number of narrow upward flow channels are formed is arranged adjacent to a floc aggregation separation area configured such that the mixed load flows down on an inclined solid-liquid separation plate. A sludge settling/accumulation area is provided below the clarification area, and a sludge settling/accumulation area is provided adjacent to the clarification area so that aeration is performed while the water to be treated that overflows from above the clarification area falls through the space between the filtration area and the filtration area. A sewage treatment device configured such that an aeration area is formed, a sewage area is provided below or adjacent to the aeration area, and the aerated liquid is discharged as treated water through the filtration area.