JP2010221194A - Water cleaning facility, purification unit thereof, and cleaning method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning unit and water cleaning facilities which effectively carry out cleaning of a first flash of surface drainage etc., and also easily maintain cleaning performance, and to provide a water cleaning method using the same. <P>SOLUTION: The cleaning unit, freely detachable in water cleaning facilities, includes a wall part which forms a nearly square cylindrical metal-mesh basket with an upper part opened, and a film body, arranged at least the bottom part of the inner surface of the wall part, in which water passes but sand can not pass, wherein the sand is packed, also planting is carried out and water to be cleaned is passed to be cleaned through plants. The plurality of the cleaning units may be arranged with an inlet, where water flows into an outer wall of the unit, and an outlet, arranged at a sidewall facing the inlet, where water flows out outside the outer wall, and also may be arranged with a trough for dispersing flowing-in water into the inner part of the outer wall near the inlet. Then, a rod body may be arranged from the upper end part of the trough toward the outlet. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a purification unit for purifying a first flush of road surface drainage, a water quality purification facility having the purification unit, and a water quality purification method using them.

Various roads, such as tires and asphalt wear, exhaust pollutants, earth and sand, and dust, accumulate on the road surface where a lot of automobiles travel, such as the lakeside road of Lake Biwa.
Such deposits leave the road surface in the rain and move to drainage channels, rivers, lakes, and seas, causing water pollution and environmental pollution.

Various water purification facilities are already known.
Since the movement of the sediment on the road surface is mainly due to the initial rainwater, that is, the first flush, the purpose of purifying the first flush is also known.
Conventional techniques related to these include Patent Documents 1-7.

  However, there has been no purification facility that works effectively by utilizing natural vegetation, especially one that can easily maintain the purification ability.

JP2008-68211 "Underflow type constructed wetland system" JP-A-2006-266072 “Rainwater Drainage Support System, Rainwater Drainage Support Method, Rainwater Drainage Control System, and Rainwater Drainage Control Method” Japanese Patent Application Laid-Open No. 2006-187682 “Water Quality Prediction Method and Rainwater Drainage Support System” JP 2006-28842 “Road surface wastewater treatment tank” Japanese Patent Application Laid-Open No. 2005-281964 “Contaminant Exclusion System in Combined Sewer” JP-A-2005-179919 “Rainwater storage and penetration facility” Japanese Patent Application Laid-Open No. 2002-242277 “Water intake and purification method and apparatus for preventing rebound of road drainage”

  Accordingly, the present invention provides a purification unit capable of effectively purifying road flushing, such as first flush, utilizing natural vegetation, and easily maintaining the purification capacity, a water purification facility having the purification unit, and It is an object of the present invention to provide a water purification method using them.

In order to solve the above problems, the purification unit of the present invention has the following configuration.
That is, it is a purification unit that can be detachably installed in a water purification facility, and is disposed on at least the bottom of a wall part that forms a substantially square cylindrical wire mesh cage having an open upper part and an inner surface of the wall part. And a membrane that does not allow sediment to pass through, is filled with soil and sand, and plants are planted, and water is purified through the plant through the water to be purified.

  Here, the size of the wall portion is 0.5 to 2 m in length and width, preferably 0.8 to 1.2 m, depth 0.2 to 1 m, preferably 0.4 to 0.6.

  As a plant to be planted in the earth and sand, a grass family or a camphor family is suitable.

  Reed is particularly useful as a gramineous plant.

  A water purification facility according to the present invention is a water purification facility in which a plurality of the purification units can be installed, and is provided on an inlet that allows water to flow into the outer wall and a side wall that faces the inlet. And an outlet that allows the water to flow out, and a gutter that disperses the incoming water is provided along the outer wall in the outer wall near the inlet.

  Here, a rod-shaped body may be installed from the upper end of the ridge toward the outflow port to contribute to the dispersion of water.

  The water purification facility of the present invention includes a pretreatment facility that receives road surface drainage and removes suspensions having a relatively large diameter, and the main purification described above that purifies inflow water from the pretreatment facility and discharges it to the outside. And a facility.

  The water purification method of the present invention is characterized in that the purification ability is maintained by exchanging or maintaining desired purification units individually in the water purification facility.

  In the water purification facility, the first flush of road surface drainage is selectively received, and the inflow water is purified through the purification unit and then discharged to the outside.

The present invention has the following effects by providing the above configuration.
That is, since the unit is used, it is easy to replace or maintain desired purification units individually, and the purification capability can be stably maintained. In addition, because it uses vegetation such as reeds, it has a low impact on nature and works for environmental conservation.

Explanatory drawing of the installation mode of a water purification facility having a purification unit according to the present invention Plan explanatory drawing of this purification facility and the outskirts Perspective view of the main part of this purification facility Perspective view of the wall of the purification unit Partial cross-sectional front view of the purification facility where reeds are planted

  Hereinafter, embodiments of the present invention will be described based on examples shown in the drawings. The embodiment is not limited to the following examples, and the design can be changed as appropriate using a conventionally known technique such as the above-mentioned patent document without departing from the gist of the present invention.

FIG. 1 is an explanatory view of an installation mode of a water purification facility having a purification unit according to the present invention.
The water purification facility according to the present invention is particularly useful for purifying road drainage such as the first flush adjacent to a lakeside road of Lake Biwa, for example.
The road surface drainage is received by the catchment basin (21) through the waterway (20) connected to the side groove of the road (10).
The target road drainage is not limited to lakeside roads, but can of course be applied to roads along rivers, and is useful for drainage from various roads including highways, general national and prefectural roads. It is.

The drainage discharged from the catchment basin (21) after adjusting the amount of water is transferred to the pretreatment facility (23) via the inflow channel (22).
In the pretreatment facility (23), floating dust, a suspension having a relatively large diameter, and the like are removed to prevent sludge accumulation and filter material clogging in the purification facility (30) described later.
It should be noted that the water catchment (21) is equipped with a water level gauge and a sluice gate, and conventionally well-known facilities are appropriately used for the parts such as the water catchment (21), the inflow channel (22) and the pretreatment facility (23). it can.

The pretreated water discharged from the pretreatment facility (23) after adjusting the amount of water is transferred to the purification facility (30) through the inflow channel (24).
The purified water purified by the purification facility (30) is discharged to the wetland (11) through the outflow channel (31).
In addition, the pretreatment water which flowed excessively into this purification facility (30) is discharged | emitted to the embankment waterway (12) beside a road through a spillage drainage channel (32). In addition, you may attach the bypass which can be recirculated to the water collecting tank (21).

2 is an explanatory plan view of the purification facility (30) and its surroundings, FIG. 3 is a perspective view showing the main part of the purification facility (30), and FIG. 4 is a wall portion that is a main component of the purification unit. FIG.
The purification facility (30) includes a plurality of purification units (40) that can be detachably installed. In the example shown in the figure, 30 grids are provided, but the number and arrangement thereof are arbitrary.
The aging of each purification unit (40) may vary depending on its position, but since it is unitized, the desired purification unit (40) can be individually replaced or cleaned and cleaned efficiently. Capability can be maintained.

As shown in FIG. 3, the purification facility (30) is surrounded by a substantially square cylindrical outer wall (41) made of concrete or the like.
Out of the side walls constituting the outer wall (41), a pair of opposing side walls has an inlet (42) that allows pretreatment water to flow into the outer wall (41), and pretreatment water outside the outer wall (41). And an outflow port (43) that allows outflow.
In the outer wall (41) in the vicinity of the inflow port (42), elongated ridges (44) are provided along the outer wall (41) in order to uniformly disperse the pretreated water that has flowed in.
The outer wall (41) is not limited to concrete, but may be made of earth, synthetic resin, metal, or the like, and may have a structure in which a waterproof sheet is attached to the open ground where the ground is dug down. Conventionally known structures can be used as appropriate as long as they have a certain water impermeability.

Thirty purification units (40) shown in FIG. 5 are installed in the gap adjacent to the basket (44).
The purification unit (40) includes a wall portion (50) that is a substantially square tubular wire mesh cage. Between the bottom part and the side part, and between the bottom parts, stays (51) and (52) contributing to strength reinforcement and lifting are provided. In the illustrated example, a stay (51) is constructed between the side surface and the bottom surface, and a stay (52) is constructed between the opposing side surfaces.
The number of stays (51) and (52) and the form of installation are arbitrary, and a plurality of stays (51) and (52) may be connected to each other, or stays (51) and (52) may not be attached. Good. The stay is not limited to a substantially linear stay as shown in the figure, and a conventionally known reinforcing member or gripping member similar to this may be provided.
The size of the wall portion (50) is 0.5 to 2 m in length and width, preferably 0.8 to 1.2 m, depth 0.2 to 1 m, preferably 0.4 to 0.6. The vertical and horizontal dimensions are 1m square and the depth is 0.5m.

On the inner surface of the wall portion (50), a film body such as a mat or sponge which allows water to pass but does not allow earth and sand to pass is provided. It may be attached to the entire inner surface of the wall (50), may be a part of the side and the bottom, or only the bottom.
The wall portion (50) is filled with earth and sand, and a rod-like body (45) such as a pipe is installed on the upper portion. The rod-shaped body (45) is arranged from the upper end of the ridge (44) toward the outlet (43), and the water is dispersed farther through the rod-shaped body (45). In the example shown in the figure, one purification unit (40) is provided per row, but the number is arbitrary. Further, the shape of the rod-like body (45) may be a flat plate shape, a bowl shape, or a plurality of branches. The diameter of the rod-like body (45) is preferably about the same as the depth of the ridge (44).

FIG. 5 is a partially sectional front explanatory view showing the purification facility (30) in which reeds are planted.
A plant (61) is planted in the earth and sand (60) of each purification unit (40).
As the earth and sand (60), for example, a 10% particle diameter of 0.25 to 0.425 mm and a uniformity coefficient of less than 10 can be used. Of course, the present invention is not limited to this, and a multi-layer structure of a gravel layer and a sand layer may be used.
A seedling of a plant (61) is planted on the surface layer portion, a purification unit (40) is incorporated into the purification facility (30), and water is supplied.

As the plant (61), a grass family and a camphor family are useful, and a reed is particularly preferable.
The surface layer of the purification unit (40) is likely to accumulate sludge, etc., but is agitated by the growth of the rhizome and root hair of the plant (61), creating an environment in which microorganisms are easy to grow, and the purification action by vegetation is effectively maintained. The

In the illustrated example, a pipe is used for the rod-like body (45), and a hole (45a) is opened on the pipe lower surface at a position corresponding to the center of each purification unit (40).
Further, the purification unit (40) may be arranged on a gravel.
As a matter of course, the positions of the holes (45a) may not be the center, and a plurality of holes may be provided instead of a single one. Although such a regular design is not mentioned every time, the design can be appropriately changed by using a conventionally known technique.

  According to the present invention, the water quality can be effectively purified with low environmental load, and thus the industrial utility value is high.

DESCRIPTION OF SYMBOLS 10 Road 11 Wetland 12 Embankment waterway 20 Waterway 21 Catchment basin 22, 24 Inflow waterway 23 Pretreatment facility 30 Main purification facility 31 Outflow waterway 32 Sewage drainage channel 40 Purification unit 41 Outer wall 42 Inlet 43 Outlet 44 樋 45 Rod-like body 45a Hole 50 Wall 51, 52 Stay 60 Earth and sand 61 Plant

Claims (5)

A purification unit that can be detachably installed in a water purification facility,
A wall portion that forms a substantially square tubular wire netting with an open top;
A film body that is disposed at least at the bottom of the inner surface of the wall and allows water to pass but does not allow earth and sand to pass through;
Plants are planted with earth and sand filling,
A purification unit of a water purification facility characterized by purifying the water through the plant through the water to be purified. Plants planted in the earth and sand
The purification unit of the water purification facility according to claim 1, wherein the purification unit is a grass family or a camphor family. A water purification facility capable of installing a plurality of purification units according to claim 1 or 2,
An inlet that allows water to flow into the outer wall;
An outlet that is provided on a side wall facing the inlet and allows water to flow out of the outer wall;
A water purification facility characterized in that a gutter that disperses the inflow water is provided along the outer wall in the outer wall near the inflow port. The water purification facility according to claim 3, wherein a rod-shaped body is installed from the upper end of the ridge toward the outlet. In the water purification facility according to claim 3 or 4,
A water purification method characterized by maintaining purification capacity by individually replacing or maintaining a desired purification unit.

Images