JPH04312601A - Golf course with preventing facility for outflow of agrichemicals - Google Patents

Abstract

PURPOSE:To meet a regulation for effluent control by a method in which agrichemicals contained in waste water(surface water and permeated water) from golf course are removed. CONSTITUTION:Water-collecting tubes 4 are set under tie ground 1, fair way 2, and green field 3, and the tubes 4 are connected to a water-collecting manhole 6 through a trunk Creating tube 5. An underground water storage pond 8 is connected with the end of a drain base tube 7 connecting manholes serially, and the outlet side of the pond 8 is connected to a regulating reservoir 9. For the pond 8, a crust is formed using a water-stop sheet under the ground and a water reservoir is formed by a gravel layer formed by packing gravel into the crust. Also, an activated carbon layer is formed in the outlet side of excess water, and the downstream side of the activated carbon layer is connected to manholes which are connected with the reservoir 9 by the drain tube.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention is based on the installation of pesticide runoff prevention facilities to remove pesticides contained in wastewater (surface water, seepage water) from golf courses and clear the wastewater management standards. Regarding golf courses.

0002

[Prior Art] Recently, agricultural chemicals (insecticides, herbicides, etc.) used on golf courses have been widely discussed as a pollution problem because they flow into rivers outside the golf course together with rainwater (or golf course drainage) and pollute the environment. ing. As long as the pesticide is sprayed in an appropriate amount, it will achieve its intended effect, and then it will be absorbed by the grass, adsorbed by the underlying dead leaves, bed soil, etc., and decomposed by microorganisms, making it harmless. However, there is a risk that pesticides that are sprayed in a larger amount than the appropriate amount, or even if the pesticide is sprayed in an appropriate amount, may get mixed into extremely small amounts of water after spraying, seepage water from rainfall, or surface water and flow out.

[0003] Conventionally, as a means of removing the above-mentioned pesticide runoff from golf courses, Mitsui Construction Co., Ltd. has developed a water collection trough (adsorbent layer) that is filled with granular activated carbon over a fairly wide area around a manhole with a permeable structure. We have developed a ``system manhole'' that allows rainwater containing pesticides flowing on the surface of the lawn to permeate through the water collection trough and efficiently introduce it into the basin, and in the process of introducing the pesticide, removes the pesticides using activated carbon. (Heisei 2
(See Kensetsu Sangyo Shimbun published on November 13, 2016).

[0004] Furthermore, Nippon Nohyaku Co., Ltd. has developed a ``golf course wastewater purification device'' that is used by connecting to the conditioning area of a golf course. This filters and solidifies floating matter in wastewater,
It is configured with an adsorption device that removes residual pesticides (
(See the Nikkei Sangyo Shimbun published on July 12, 1990). Furthermore, Ebara Infilco Corporation has developed a "Pesticide Removal System" that uses a combination of biofilm filtration and activated carbon adsorption equipment to remove pesticides (insecticides and herbicides) from water in golf course regulation ponds to achieve target water quality. (Refer to the Japan Sewerage Newspaper published on July 23, 1990).

[0005]

SUMMARY OF THE INVENTION As mentioned above, several methods and devices have been developed and known for removing agricultural chemicals contained in wastewater from golf courses. However, if individual wastewater treatment devices are scattered throughout the golf course, it cannot be said that the entire wastewater of the golf course can be reliably treated, and there is a concern about the leakage of untreated wastewater. That is, it is important to establish a system that efficiently collects and treats wastewater in a wide range of areas, at least in the water collection area of a golf course. Further, as described above, in order to treat the wastewater of the entire golf course without leaking with each wastewater treatment device, a very large number of devices are required, which is uneconomical. Furthermore, with only wastewater treatment equipment that is limited to before and after the above-mentioned regulating pond, there are problems in setting the quality and amount of discharged water, and there are problems such as the constant need for operating power, and these are issues that need to be resolved. ing.

[0006]

[Means for Solving the Problems] As a means for solving the problems of the prior art described above, a golf course in which a pesticide runoff prevention facility according to the present invention has been installed is provided with a golf course as an example shown in the drawings. Water collection pipes 4 are laid under the ground of 1, fairways 2, and greens 3, each water collection pipe 4 is connected to a water collection manhole 6 by a main treatment pipe 5, and a drainage main pipe 7 connects the manholes 6 in series.
An underground reservoir 8 is connected to the terminal portion of the reservoir 8, and an outflow side of the underground reservoir 8 is connected to a regulating pond 9. The underground reservoir 8
A pond shell 10 is formed under the ground by a water-stop sheet, a water storage part is formed inside the pond shell 10 by a gravel layer 11 filled with gravel, and an activated carbon filled with granular activated carbon is formed in the outflow part of excess water. A layer 12 is formed, a manhole 13 is connected to the downstream side of the activated carbon layer 12, and the manhole 13 is connected to the regulating pond 9 by a drain pipe 39.

According to the present invention, a well 14 for water reuse is installed in the underground reservoir 8, water is sent to a water distribution tank, and a main treatment pipe 5 or a main drainage pipe 7, etc., is connected to the manhole 6. The inflow pipe 25 has activated carbon 1 having a relatively large particle size in its lower half, with the cloth filter pipe 15 as the core.
6 is arranged with an appropriate layer thickness, and gravel 17 is arranged with an appropriate layer thickness on the upper half side, and the main treatment pipe 5 or drainage main 7 connected to the manhole 6. In the inflow pipe 25 such as
0 is branched, a filter layer 21 filled with activated carbon is formed in the sub pipe 20, and a filter layer 22 is provided at the upstream end of the filter layer 21. The manhole 6 to which the pipe 7 and the like are connected as the inflow pipe 25 and the outflow pipe 26 is provided with a partition wall 27 that divides the inside into two parts: a connection side for the inflow pipe 25 and a connection side for the outflow pipe 26. 27 has a communication port 28 of an appropriate size between it and the manhole bottom 6a, and is installed to have an appropriate flow height, so that the inside of the manhole partitioned by the partition wall 27 has no inflow. Inlet 25a of pipe 25
A flow channel from a lower position to a position lower than the outlet 26a of the outflow pipe 26 is filled with activated carbon 29, and a filter layer 30 is installed on the upper surface of the activated carbon 29;
The main treatment pipe 5 or the drainage main pipe 7, etc. are the inflow pipe 25 and the outflow pipe 2.
A partition wall 27 is installed in the manhole 6 to be connected to the manhole bottom 6, and the partition wall 27 divides the inside of the manhole into a connection side for the inflow pipe 25 and a connection side for the outflow pipe 26.
It is installed to have a communication port 28 of an appropriate size between the manhole and the manhole a, and has an appropriate flow height, and connects especially the outflow pipe 26 inside the manhole partitioned by the partition wall 27. Activated carbon 29 is filled in the flow channel from the position of the spacer 31 with a water-permeable structure installed at the manhole bottom 6a to a position lower than the outlet 26a of the outflow pipe 26, and a filter layer is provided on the upper surface of the activated carbon 29. Each of them is also characterized by the fact that 30 are installed.

[0008]

[Action] Tei ground 1, fairway 2, green 3
Rainwater, etc. (seepage water) containing agricultural chemicals that has permeated underground from the ground is collected by an underground water collection pipe 4. This collected water passes through a water collection pipe 4, a main treatment pipe 5, a water collection manhole 6, a drainage main pipe 7, etc., and is finally collected in an underground reservoir 8, and pesticides are removed in the process. In the underground reservoir 8, water is retained in the gaps of the gravel layer 11 inside the pond shell 10, and a considerable amount of water is stored, and a part of the water is used as gray water for water spraying, car washing, etc. Since bed soil is laid on the gravel layer 11 and grass is planted, the ground surface can be used as a general fairway or rough surface. The underground reservoir 8
Since the surplus water (overflow) flows out through the activated carbon layer 13, pesticides are adsorbed and removed in this process as well. As mentioned above, since pesticides are adsorbed and removed by activated carbon or the like during the process of flowing through the main treatment pipe 5, drainage main pipe 7, or manhole 6 leading to the underground reservoir 8, so to speak, each water collection area of the golf course Since the entire area will be treated to prevent agricultural chemicals from running out, there is no need to worry about any leakage. Furthermore, there is a degree of freedom in setting the quality and quantity of discharged water.

[0009]

Embodiments Next, illustrated embodiments of the present invention will be described. FIG. 1 shows the planar layout of a course design at a certain golf course. In particular, the two-dot chain line 40 on the outer periphery means a so-called watershed, and the area surrounded by the two-dot chain line 40 is one water collection area. . The drainage from this water collection area is configured to be finally led to a regulating pond 9. That is, under the ground of each green 3, fairway 2, and teeing ground 1 belonging to this water collection area, there is a main water collection pipe 4 as shown in detail in FIG.
A net of water collection pipes 4 is installed as a collection of many branch water collection pipes 4b branched like branches from a, so that rainwater containing agricultural chemicals can be collected over a wide area without leaking. The details of the configuration of the main water collection pipe 4a and the branch water collection pipe 4b are as follows:
As an example, as shown in FIG. 3, a groove 45 with a width of about 300 mm and a depth of about 400 mm is dug under the mixed sand 41, river sand only 42, gravel layer 43, and crushed stone No. 4 layer 44 that make up the green 3. A netron pipe 46 with a diameter of about 150 mm for the main line and about 100 mm for the branch line is laid in the lower part of the groove 45, and the surrounding area is also densely filled with crushed stone No. 4 47. Therefore, rainwater that permeates underground from the surface of the green 3 is widely introduced into the groove 45 through the crushed stone layer 44, collected, and guided downstream through the netron pipe 46.

The permeated water collected in the main water collection pipe 4a having the above structure is first guided to the water collection manhole 6 by the main treatment pipe 5. The water is then led from the water conduit 50 to the underground reservoir 8 via the drainage main pipe 7 that connects each relay manhole to the manhole in series. Note that the main treatment pipe 5 and the main drainage pipe 7 may also be installed in the configuration of the water collection pipe 4a or 4b shown in FIG. 3, respectively. Alternatively, as shown in FIGS. 5 and 6, it is also possible to construct an underdrain drainage channel that uses activated carbon to remove pesticides from wastewater. In FIGS. 5 and 6, activated carbon 16 with a relatively large particle size is placed on the lower half side of the cloth filter tube 15, which serves as the main channel, as the core, with a width of 30 cm and a depth of 10 to 20 cm.
They are arranged with a layer thickness of about cm, and a crushed stone layer (or gravel layer) 17 is arranged on the upper half side. Therefore, when the amount of water infiltrating from the fairway 2, etc. is as low as normal, rainwater, etc. infiltrates from the crushed stone layer 17 to the activated carbon layer 16, flows downstream in the activated carbon layer 16 according to the flow gradient, and contacts between them. Pesticides are adsorbed and removed during flow. However, in the vicinity of the manhole 6, the water hits the manhole wall and returns to the cloth filter pipe 15 in an overflowing form, and falls into the manhole 6. When the amount of seepage water is large due to heavy rain, etc., excess water that does not flow through the activated carbon layer 16 flows directly through the cloth filter pipe 15 and falls into the manhole 6.

However, as a means to avoid the trouble of constructing the above-mentioned culvert drainage channel, the method shown in FIG. 7 or 8 may be used.
It is also possible to remove pesticides using activated carbon only in the part that flows into the manhole 6 as shown in FIG. What is shown in FIG.
A relatively short sub-pipe 20 that detours to the manhole 6 is branched from the bottom of the pipe at a position slightly upstream of the inlet 25a, and a long and narrow bag filled with activated carbon is inserted into the sub-pipe 20 to form a filtration layer. 21 is formed. Further, a filter layer 22 is provided on the upstream end surface of the filter layer 21 . When the amount of waste water flowing through the inflow pipe 25 is normal, all the waste water flows into the sub pipe 20, flows while coming into contact with activated carbon, and agricultural chemicals are adsorbed and removed. If the amount of water that exceeds the allowable value of the secondary pipe 20 flows through the inflow pipe 25 due to heavy rain, etc., the excess water will flow through the secondary pipe 20 and directly from the inlet 25a to the manhole 6.
flowing inward. According to this configuration, the filter layer 22
In addition to being able to easily replace the filter layer 21, it also has the advantage of being structurally inexpensive to construct. The embodiment shown in FIG. 7 shows a structure in which the head difference between the inflow pipe 25 and the outflow pipe 26 can be made sufficiently large. On the contrary, FIG. 8 shows an example in which it is difficult to ensure a sufficiently long effective length of the filtration layer 21 because the head is not large enough. In short, this is a configuration in which the branching point of the secondary pipe 20 is moved far upstream of the inflow pipe 25, and the secondary pipe 20 is installed substantially parallel to the inflow pipe 25 for a sufficiently long length. In the case of this embodiment, the bag filled with activated carbon 21 is inserted and installed into the sub-pipe 20 from the outlet side of the sub-pipe 20.

[0012] Removal of agricultural chemicals in wastewater can also be carried out in the manhole 6 having the structure shown in FIGS. 9A, B, and C. That is, the main treatment pipe 5 or the main drainage pipe 7 is the inflow pipe 2.
5. The inside of the manhole 6 connected as the outflow pipe 26 is separated from the connection side of the inflow pipe 25 and the outflow pipe 26 by the partition wall 27.
It is divided into two rooms with a connecting side. This manhole 6 is considerably deeper than a normal manhole (especially the outflow pipe 2).
6) with a considerable depth from the location of the outlet 26a. At the bottom of the partition wall 27, there is a communication port 28 of an appropriate size (
Therefore, the two rooms inside the manhole 6 are formed into a U-shaped flow channel. The height position of the top end of the partition wall 27 is approximately the same height as the lower end of the inlet port 25a of the inflow pipe 25. This is because of heavy rain etc. Inflow pipe 2
When the amount of water flowing in from 5 is large, the inflow water directly exceeds the top of the partition wall 27 and overflows to the outlet 26a of the outflow pipe 26, thereby ensuring a sufficiently large amount of water. Granular activated carbon 29 is filled in two rooms in the manhole which are divided into two by the partition wall 27. Activated carbon 29 is filled in a series of flow channels from a position lower than the inlet 25a of the inflow pipe 25 to a position lower than the outlet 26a of the outflow pipe 26. A filter layer 30 is provided on each upper surface of the activated carbon 29. Therefore,
The normal amount of water that has fallen into the manhole 6 from the inflow pipe 25 flows through a U-shaped flow channel that is divided into two by a partition wall 27 and communicated by a communication port 28, while being in contact with the activated carbon 29 filled there for a sufficiently long time. In the process of this contact flow, pesticides in the wastewater are adsorbed and removed by the activated carbon 29. The thus purified waste water exits through the outflow pipe 26. Sediment contained in the wastewater flowing in from the inflow pipe 25 is removed by the filter layer 30, and clogging of the activated carbon layer 29 is prevented.

FIG. 10 shows a planar arrangement in which there are two inflow pipes 25 connected to the manhole 6 and one outflow pipe 26. In FIGS. 11A and 11B, a guide 35 made of an angle or the like is installed approximately perpendicularly to the inner surface of the manhole, and the partition wall 2
7 shows an embodiment configured as a fitting type along the guide 35.

FIG. 12 shows an embodiment in which activated carbon 29 is installed only in a manhole 6 divided into two by a partition wall 27, particularly in a room to which an outflow pipe 26 is connected. In this case, the activated carbon 29 is packed in a cloth bag. A spacer 31 having a water-permeable structure is installed at the manhole bottom 6a, and the cloth bag containing the activated carbon is inserted onto the spacer 31. The activated carbon 29 is filled to a level lower than the outlet 26a of the outlet pipe 26, and a filter layer 30 is installed on the upper surface thereof. In the case of this embodiment, the earth and sand components contained in the wastewater are removed from the inflow pipe 25.
When water falls into the manhole 6, it settles in the room on the inflow side and is separated, thereby preventing clogging of the activated carbon 29.

The wastewater that has passed through the various pesticide removal facilities described above is finally collected in the underground reservoir 8 shown in FIG. This underground reservoir 8 is mainly for the purpose of reusing golf course drainage water (seepage water), and the pond shell 10 has a planar shape of about 40 m in diameter and about 1.5 m deep under the ground with a water stop sheet. It is formed on a scale. Several cleaning wells 37 are provided within the planar shape of this underground reservoir 8 at a pitch of approximately 5 m, and a water supply well 14 is installed in the center for reusing wastewater within the golf course as a gray water supply. ing. The water sent from the water supply well 14 to the water distribution tank is reused, for example, for watering the course, flushing toilets, washing cars, cleaning, and other miscellaneous water supplies, thereby saving on water charges and pumping up groundwater. Efforts are being made to reduce the amount.

A gravel layer 11 filled with gravel is formed inside the pond shell 10 as a water storage section, and the above-mentioned drainage main pipe 7
Alternatively, wastewater led to a perforated pipe 38 connected to a water conduit 50 branched from the main drainage pipe 7 sequentially flows down to the gravel layer 11 and is stored therein. The normal full water level is indicated as W1. An activated carbon layer 12 filled with granular activated carbon is formed at the outlet of the surplus water from this underground reservoir 8, and the surplus water flows out through the activated carbon layer 12 and reaches the manhole 13.
Pesticides contained in wastewater are adsorbed and removed during the process of passing through the wastewater.

[0017] In this way, the golf course wastewater, which has had pesticides removed with activated carbon in several stages and has fully cleared the drainage standards, is discharged from the manhole 13 through the drain pipe 39 to the regulating pond 9. At this stage, the pesticides are removed. There is no need to worry about pollution.

[0018]

[Effects achieved by the present invention] A golf course equipped with the pesticide runoff prevention facility according to the present invention can collect and treat a wide range of wastewater from the entire golf course without any leakage, and there is no need to worry about treatment leakage, so the problem of pollution can be prevented. can be prevented. In addition, since the total pesticide runoff prevention facility covering the entire golf course is installed underground, it is expected to have an economical and highly efficient effect on preventing pesticide runoff without having a negative impact on the course design and landscape on the ground surface. It can be done.

[Brief explanation of the drawing]

FIG. 1 is a plan layout showing a part of a golf course where the pesticide runoff prevention facility of the present invention is installed.

FIG. 2 is a plan layout of water collection pipes installed on the green.

FIG. 3 is a sectional view of a water collection pipe.

FIG. 4 is a cross-sectional view of an underground reservoir.

FIG. 5 is a cross-sectional view of a culvert drainage channel.

FIG. 6 is a cross-sectional view of a culvert drainage channel and a manhole.

FIG. 7 is a sectional view showing a manhole for removing pesticides using a secondary pipe.

FIG. 8 is a sectional view showing a manhole for removing pesticides using a secondary pipe.

9A, B, and C are vertical cross-sectional views of a manhole for removing pesticides, and cross-sectional views taken along arrows bb and cc; FIG.

FIG. 10 is a horizontal sectional view of a pesticide removal manhole.

FIGS. 11A and 11B are a vertical cross-sectional view and a horizontal cross-sectional view of a pesticide removal manhole.

FIG. 12 is a cross-sectional view of a pesticide removal manhole.

[Explanation of symbols]

1 Teigland
16 Activated carbon 2 Fairway
17 Gravel 3 Green
25a
Inlet 4 Water collection pipe
26a Outlet 5 Main processing pipe
20 Sub pipe 6 Water collection manhole 21
Filtration layer 7 Drainage main
22 Filter pipe 8 Underground reservoir
26 Outflow pipe 9 Preparation pond
27 Partition wall 10 Pond shell
28 Communication port 11 Gravel layer
29 Activated carbon 12 Activated carbon layer
30 Filter layer 13 Manhole
31 Spacer

Claims (6)

[Claims] Claim 1: Water collection pipes are laid under the ground of the tee grounds, fairways, and greens, each water collection pipe is connected to a water collection manhole by a main treatment pipe, and the terminal part of the drainage main that connects the manholes in series. An underground reservoir is connected to the underground reservoir, and the outflow side of the underground reservoir is connected to a regulating pond, and the underground reservoir has a pond shell formed under the ground by a water stop sheet, and the inside of the pond shell is filled with gravel. A water storage part is formed by a gravel layer, an activated carbon layer filled with activated carbon is formed at the outflow part of excess water, a manhole is connected to the downstream side of the activated carbon layer, and the manhole is connected to a regulating pond by a drainage pipe. A golf course equipped with pesticide runoff prevention facilities. 2. A golf course equipped with an agricultural chemical run-off prevention facility according to claim 1, wherein a well is installed in the underground reservoir for reusing wastewater, and water is sent to a water distribution tank. 3. An inflow pipe such as a main treatment pipe or a drainage main pipe connected to a manhole has a cloth filter pipe as its core, and activated carbon having a relatively large particle size is arranged in an appropriate layer thickness on the lower half side thereof, 2. A golf course equipped with an agricultural chemical run-off prevention facility according to claim 1, characterized in that gravel is arranged in an appropriate layer thickness on the upper half side. [Claim 4] An inflow pipe such as a main treatment pipe or a drainage main pipe connected to a manhole has a sub pipe branched off from the bottom of the pipe at a position slightly upstream from the inlet into the manhole to detour to the manhole. The pesticide outflow prevention facility according to claim 1, wherein a filtration layer filled with activated carbon is formed in the sub pipe, and a filter layer is provided at the upstream end of the filtration layer. Golf course. 5. A manhole to which a main treatment pipe or a drainage main pipe is connected is provided with a partition wall that divides the inside of the manhole into two parts: an inflow pipe connection side and an outflow pipe connection side. The manhole is installed with an appropriately sized communication opening between the bottom and the bottom, and has an appropriate overflow height. Claim 1 characterized in that activated carbon is filled in the flow channel to a position lower than the outlet of the outflow pipe, and a filter layer is installed on the upper surface of the activated carbon.
A golf course where the pesticide runoff prevention facility described above has been installed. [Claim 6] A manhole to which a main treatment pipe or a drainage main pipe is connected is provided with a partition wall that divides the interior into two parts: an inflow pipe connection side and an outflow pipe connection side, and the partition wall is connected to the manhole. The manhole is installed to have an appropriately sized communication opening with the bottom and an appropriate overflow height, and is installed inside the manhole partitioned by the partition wall, especially in the room to which the outflow pipe is connected. Activated carbon is filled in the flow channel from the position of the spacer of the water flow structure installed at the bottom of the manhole to a position lower than the outlet of the outflow pipe, and a filter layer is installed on the top surface of the activated carbon. , claim 1
A golf course where the pesticide runoff prevention facility described above has been installed.