JPH06328095A - Method for purifying soil water and device - Google Patents

Abstract

PURPOSE:To provide a soil water purifying method which can be used semi- permanently without the necessity of using expendable materials like active carbon and others or without producing excessive sludge or subsequent harmful matters or waste matters to achieve an extensive cost reduction thereof. CONSTITUTION:This method comprises the steps of carrying the purification on soil water lines 901, 902 and 903 by means of aqueous plants 5 growing in soil water lines 901, 902 and 903, and infiltrating soil water in the soil water lines 901, 902 and 903 into full-up soils 701, 702 and 703 adjoining the soil water lines 901, 902 and 903 and purifying the soil water by means of aqueous plants 5 growing on the full-up soils 701, 702 and 703.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage purification apparatus that utilizes the purification action of aqueous plants.

[0002]

Conventionally, sewage, factory wastewater, domestic wastewater, etc. have been conventionally discharged to rivers and lakes after being purified by a septic tank, or advanced purification such as catalytic oxidation method, activated carbon adsorption method, ozone oxidation method, etc. After treatment, it is released to rivers and lakes.

[0003]

However, the conventional catalytic oxidation method, activated carbon adsorption method, ozone oxidation method and other advanced purification methods have the following problems. Excess sludge is generated. Consumable materials such as activated carbon and ozone discharge tubes are required for purification. Ozone, harmful chemical substances due to ozone reaction, secondary harmful substances such as waste activated carbon, and waste are generated. It is necessary to manage the securing of drivers and maintenance. The purifier requires motive energy. The present invention has been devised in view of the above circumstances, and an object of the present invention is to perform a high-level purification treatment while solving the above-mentioned problems, and it can be used semipermanently, and it is greatly effective in purifying wastewater. An object of the present invention is to provide a sewage purification method and device that can reduce costs.

[0004]

In order to achieve the above-mentioned object, the present invention relates to a method for purifying sewage, comprising a step of purifying in a sewage channel into which sewage flows, by an aqueous plant that reproduces in the sewage channel. A step of infiltrating the sewage in the sewage channel into the embankment adjacent to the sewage channel and purifying the sewage with an aqueous plant that reproduces in the embankment.

The present invention also relates to a sewage purification apparatus, comprising a tank body having a predetermined volume, an embankment provided inside the tank body with a predetermined width, height and length, A sewage channel provided inside the tank body on the side of the embankment, an aquatic plant reproduced in the tank body, and a sewage flowing into the sewage channel in a direction that crosses the sewage channel and the embankment. And is provided.

Further, according to the present invention, the flow means comprises a wastewater inlet provided on one side of the tank body in a direction traversing the embankment and the wastewater passage, and the flow on the other side of the tank body. It is characterized by being configured with an outlet provided at a position lower than the inlet. Further, in the present invention, a plurality of the embankments and the sewage channels are alternately provided so as to extend in a direction intersecting a direction connecting the inlet side and the outlet side between the inlet and the outlet. It is characterized by Further, the present invention is provided with a plurality of the above-mentioned sewage purification devices at intervals in the vertical direction, among the vertically adjacent sewage purification devices, the outlet of the upper sewage purification device and the inlet of the lower sewage purification device. It is characterized in that a water channel for connection is provided.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a main part of a sewage purification apparatus according to an embodiment, and FIG. 2 is an enlarged perspective view of an embankment portion. Reference numeral 1 is a sewage purification apparatus. The sewage purification apparatus 1 includes a tank body 3, a plurality of embankments 7 provided inside the tank body 3 for reproducing an aqueous plant 5, and a wastewater channel 9.
It is composed by. The tank body 3 has a bottom portion 11 having a rectangular shape in plan view, and side portions 13 standing upright from each of four sides of the bottom portion 11 so that an upper portion thereof is open.

[0008] Of the four side surface portions 13, one side surface portion 1301 of the side surface portion 13 facing each other has a sewage inlet 1.
5 is provided, and the sewage outlet 1 is provided on the other side surface portion 1303.
7 is provided. The inflow port 15 has the side surface portion 1.
301, and a container 19 having an open upper portion extending along the side surface portion 1301 outside the side surface portion 1301. Sewage supplied to the container 19 exceeds the upper edge 1301A of the side surface portion 1301. It flows into the inside of the tank body 3, and the side surface portion 1
301 serves as an overflow weir. The outlet 17
Is formed by the other side surface portion 1303.
The upper edge 1303A of 03 is the upper edge 13 of the side surface portion 1301.
The water that is formed lower than 01A and is purified inside the tank body 3 is discharged over the upper edge of the side surface portion 1303A. Therefore, the water level inside the tank body 3 is
The sewage having the same height as the upper edge 1303A of No. 3 and flowing into the inside of the tank body 3 flows from the inflow port 15 side to the outflow port 17 side without any power means.

Inside the tank body 3, a first embankment 701 and a second embankment 702 are arranged from the side surface portion 1301 side at predetermined intervals in a direction parallel to the side surface portion 1301 and orthogonal to the side surface portion 1301. , Third embankments 703 ... Are provided in large numbers. Then, the first embankment 701 is formed by the inflowing sewage.
A first sewage channel 901 is formed between the first embankment 701 and the side surface portion 1301, a second sewage channel 902 is formed between the first embankment 701 and the second embankment 702, and a second embankment 702 and the third embankment 702. The third sewage channel 903 is formed between the embankments 703, and thus a large number of embankments 7 and sewage channels 9 are alternately provided.

As shown in FIG. 2, each of the embankments 7 has a soil layer 21 located on the innermost side and a sand layer 23 covering the outer side thereof.
And a gravel layer 25 that covers the outside of the sand layer 23. Further, a large number of aquatic plants 5 are reproduced in the embankment 7 and the wastewater channel 9. As the aqueous plant 5, for example,
Extracted plants 501 such as reeds, cattails and ginger, water lilies,
Flotation plants such as lotus and duckweed 502, blackberry, fusamo,
A submerged plant 503 such as Canadian moth can be exemplified.
The selection of these aquatic plants 5 is determined so that the purifying action is shared depending on the function of each of the aquatic plants 5 and the purifying action is efficiently performed in a limited area.

Next, the operation will be described. Side part 13
The sewage that has flowed into the first sewage channel 901 beyond the upper edge 1301A of 01 is a submerged plant 503 or a floating plant 502.
As a result, a part of the dissolved nutrients of the sewage is taken in and invades into the side surface of the first embankment 701. Inside the first embankment 701, first, the nutrients in the wastewater are further taken up by the extracted plant 501. And the embankment 7 is a soil layer 21,
Since it is composed of the sand layer 23 and the gravel layer 25, turbidity of sewage is filtered by these layers. Further, the microorganisms in the soil layer 21 and the biofilm formed on the surface of the gravel layer 25 are denitrified, catalytically oxidized, etc., and purified. Then, the sewage that has permeated the first embankment 701 becomes the second sewage channel 9
02, the second sewage channel 902 to the second embankment 702.
From the third sewage channel 903 to the third embankment 703, and is highly purified by repeating the same action.

According to this embodiment, there is no need for consumable materials such as activated carbon and ozone discharge tubes as in the conventional advanced purification method, and excess sludge or secondary harmful substances and waste are discarded. No matter is generated, no need to secure drivers or maintenance,
Further, it can be used semi-permanently, and it is possible to significantly reduce the cost in purifying the sewage. Further, the appearance can be enhanced by appropriately selecting the aqueous plant 5. Further, as in the embodiment, if there is a difference in height between the inflow port 15 and the outflow port 17, the inflow port 15
Since sewage can be made to flow from the side to the outlet 17, the motive energy is not required, which is even more advantageous in cost reduction.

In the above embodiment, no power means is used,
The case where sewage is caused to flow by simply changing the heights of the inflow port 15 and the outflow port 17 has been described, but sewage is supplied to the sewage channel 9 using a pump or the like, or a tank body is used using a pump or the like. The purified water may be sucked out from the inside of 3, and in this case, the pump or the like corresponds to the flow means.

The sewage purification apparatus according to the present invention can be used in various ways. For example, in a sewage treatment plant, a water distribution treatment plant of a factory, or the like, it is conceivable to circulate the sewage purification device according to the present invention in a strip shape around the site as a part of the green belt. Further, also in rivers and lakes, particularly in lakes, the sewage purification apparatus according to the present invention can be configured as a floating dock so that it can be used while being moved to a heavily polluted location in the lake. Further, in a place where space cannot be secured, they can be arranged vertically or reassembled in a stepwise manner.

FIG. 3 shows an embodiment in which the sewage purification apparatus is floated on a lake and constructed as a floating dock. Sewage purification device 3
1 is a tank body 33 formed so as to be able to float above the lake 32, and first, second, and third embankments 35 formed inside the tank body 33.
01, 3502, 3503 and the first and second waste water channels 37
01, 3702, the sewage is supplied onto the first embankment 3501 by the pump 39, the first embankment 3501 to the first sewage channel 3701, the second sill channel 3502, the second sewage channel 3702, the third sewage channel 3702. The water highly purified by the aquatic plants 5 is returned to the lake 41 through the embankment 3503. The wastewater purification device 31 may be connected to the mooring facility 43,
Alternatively, it may be used while being moved to a highly contaminated area 45.

FIG. 4 shows an embodiment in which sewage purification devices are arranged vertically. In the embodiment, three sewage purification devices 51, 52, 53 are provided vertically with a vertical member 55 interposed therebetween. One embankment 58 and one sewage channel 59 are provided inside each tank body 57.
It is supplied to the dirty water channel 59 from the inflow port 61 of 7. And
The sewage supplied to the sewage channel 59 passes through the embankment 58 and the slits of the vertical plate 62 to reach the outlet 63, and is supplied from the outlet 63 to the sewage channel 59 of the middle tank body 57 via the pipe 65. In this case, the outlet of the pipe 65 becomes the inlet of the tank body 57 in the middle stage. Similarly, the sewage supplied to the sewage channel 59 passes through the embankment 58, the slits of the vertical plate 62, and the like, and the outlet 6
3 through the outlet 63 through the pipe 65 to the lower tank body 5
The wastewater is supplied to the wastewater channel 59 of No. 7 and passes through the embankment 58 and the slit of the vertical plate 62 to reach the outflow port 63, and the water highly purified by the aqueous plant 5 is discharged from the outflow port 63.

In the embodiment, the case where both the embankment and the water channel are formed in a straight line has been described. For example, the embankment and the water channel are formed in an annular shape or an elliptical shape, and the sewage is made to flow from the inside to the outside or from the outside to the inside. Meanwhile, the purification may be performed using an aqueous plant.

[0018]

As is apparent from the above description, according to the method and apparatus for purifying sewage according to the present invention, since sewage is purified by using aqueous plants, activated carbon, ozone discharge tubes, etc. It does not require consumable materials and can be used semi-permanently, and it does not generate excess sludge, secondary harmful substances or waste, and it does not require maintenance or maintenance of the driver. By appropriately selecting an aqueous plant, it is possible to enhance the aesthetics of the sewage purification device, and further, it becomes possible to eliminate the need for power energy and to significantly reduce the cost for purifying sewage.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a sewage purification device.

FIG. 2 is an enlarged perspective view of an embankment portion.

FIG. 3 is a plan view of a sewage purification device floating on a lake and used as a floating dock.

FIG. 4 is a schematic front view of the sewage purification devices arranged vertically.

[Explanation of symbols]

 1, 31, 51, 52, 53 Sewage purification device 3, 33, 57 Tank body 5 Water-based plant 7 Embankment 9 Wastewater channel 21 Soil layer 23 Sand tank 25 Gravel layer

Claims (5)

[Claims] 1. A step of purifying water in a sewage channel into which sewage flows by using aquatic plants that reproduce in the sewage channel, and infiltrating the sewage in the sewage channel into an embankment adjacent to the sewage channel to reproduce on the embankment. A method for purifying sewage, comprising the step of purifying sewage with an aqueous plant. 2. A tank body having a predetermined volume, an embankment provided in the tank body with a predetermined width, height, and length, and a side portion of the embankment inside the tank body. A sewage purification apparatus comprising: a sewage channel, an aqueous plant regenerated in the tank body, and a flow means for flowing sewage flowing into the sewage channel in a direction that traverses the sewage channel and the embankment. 3. The flow means is lower than the inflow port provided on one side of the tank body in the direction crossing the embankment and the wastewater channel, and on the other side of the tank body than the inflow port. The sewage purification device according to claim 2, wherein the sewage purification device is configured with an outlet provided at a location. 4. The plurality of embankments and sewage channels are alternately provided between the inflow port and the outflow port, extending in a direction intersecting a direction connecting the inflow port side and the outflow port side. The sewage purification device according to claim 3, 5. The plurality of sewage purification devices are provided at intervals in the vertical direction, and of the sewage purification devices that are vertically adjacent to each other, the outlet of the upper sewage purification device and the inlet of the lower sewage purification device are connected. The sewage purification device according to claim 3, further comprising a water passage.