JPH05309207A - Clarifying system for water in pond - Google Patents

Abstract

PURPOSE:To provide an installation capable of economically supplying water and synthetically maintaining water quality and water quantity of a pond. CONSTITUTION:A clarifying system for water in a pond is constituted of a drawer 2 for drawing water from the sea, lakes and marshes or a river, a flocculation tank 3 wherein drawn water is introduced thereinto and solid suspended in the water is flocculated, a first precipitation tank 4 for introducing a liquid-solid mixed body from the flocculation tank 3 and settling the flocculated solid, a multipurpose water tank 5 for introducing the supernatant liquid of the first precipitation tank 4 thereinto and furthermore settling the solid and also leading out the supernatant liquid to a pond and a circulating device 6 for drawing one part of water in the pond, removing solid and returning the water to the pond. Furthermore, the clarifying system for water is equipped with both an introduction device 9 for introducing one part of water in the pond into the circulating device 6 and a filter 10 for performing filtration and returning filtrate to the pond.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for supplying water to a pond and maintaining good water quality in the pond, and particularly to a system suitable for a large-scale artificial pond.

[0002]

2. Description of the Related Art Recently, as the number of lakes and rivers where the scenery can be enjoyed has decreased, a hydrophilic space that enriches people's lives has been required. Especially recently
Various waterfront plans with residential and commercial functions and public utility facilities have been proposed, and the number of townscapes incorporating large-scale artificial ponds has increased in these plans. Conventionally, tap water or well water has been used as the water supplied to the artificial pond. Then, the water in the artificial pond is treated by a sand filter or the like and returned to the pond.

[0003]

However, when the artificial pond becomes large-scale, the cost of supplying tap water and the like becomes high, and it is possible to take water from a neighboring sea, lake or river and supply it at a low cost. Is desired. By the way, seawater and the like in an area where an artificial pond is desired is eutrophication due to a large amount of drainage from houses and the like, and is not suitable as it is as the supply water for the artificial pond. On the other hand, the pond has a problem that the water quality is not stable as compared with the river and the abnormal growth of algae occurs due to the change of weather.
Therefore, especially in large-scale artificial ponds, it is necessary to provide a device for solving unsteady water quality abnormalities peculiar to the ponds. In addition, sightseeing boats such as water limousines often operate in large ponds. A ship like this
It is necessary to paint the bottom of the ship regularly. Providing each of these devices requires a large space and increases the cost of constructing the equipment.

The present invention has been made in view of the above circumstances. An object of the present invention is to provide a facility capable of economically supplying water and comprehensively maintaining the quality and quantity of water in a pond. To provide.

[0005]

In order to solve the above problems, a water purification system for a pond according to claim 1 is a pumping device for pumping water from the sea, a lake or a river, and a pumping device for pumping water A coagulation tank for coagulating suspended solids, a sedimentation tank for introducing a solid-liquid mixture from this coagulation tank to settle the coagulated solids, and discharging the supernatant liquid to a pond, and pumping up part of the pond water It comprises a circulation device for removing solids and returning it to the pond, and the circulation device comprises a filtration introducing device for partially introducing water in the pond, and a filtration device for performing filtration and returning the filtrate to the pond. is there.

In order to solve the above problems, a water purification system for a pond according to a second aspect of the invention is a pumping device for pumping water from the sea, a lake or a river, and a suspended solid in water into which the pumped water is introduced. A coagulation tank for aggregating, a first settling tank for introducing a solid-liquid mixture from this aggregating tank to settle the agglomerated solids, and a supernatant liquid of the first settling tank for further solidifying the solid and its supernatant It consists of a multipurpose water tank that draws out the liquid to the pond, and a circulation device that pumps a part of the water of the pond and removes the solid content and returns it to the pond, and the circulation device introduces the water of the pond and the filtration that performs filtration. And a filtering device for returning the water to the pond.

The water purification system for a pond according to claim 3 is the water purification system for a pond according to claim 2, wherein the first outlet means for sending the cleaning wastewater of the filtering device to the multipurpose water tank, and the multipurpose water tank. The second means for sending the appropriate amount of the waste water in the inside to the coagulation tank is provided as the means for solving the above problems.

A water purification system for a pond according to a fourth aspect is the water purification system for a pond according to the second aspect, in which the wastewater generated by the collection of sludge and the collection of floating dust is sent to the multipurpose water tank. The solution means for solving the above-mentioned problems is provided by including the derivation means of 1) and the second derivation means of sending the wastewater in the multipurpose water tank to the coagulation tank in appropriate amounts.

A water purification system for a pond according to claim 5 is the water purification system for a pond according to claim 2, further comprising a water tank introducing device for introducing water from the pond into the multipurpose water tank. However, the algaecide treatment tank in which the water in the pond is introduced and the algaecide is put in, the algaecide reaction tank into which the water from this algaecide treatment tank flows, and the water from this algaecide reaction tank It consists of a residual chlorine removal tank that contains inflow residual chlorine removal agent, and a residual chlorine removal tank in which water from this residual chlorine removal tank flows in and stays for a specified time to reduce the residual chlorine to the pond. Was used as a means for solving the above problems.

The water purification system for a pond according to claim 6 is the water purification system for a pond according to claim 2, wherein the multipurpose water tank is provided with a water gate for passage of a ship. It was a means.

[0011]

In the water purification system for a pond according to the first and second aspects of the present invention, seawater or the like is pumped up and introduced into the coagulation tank. In the flocculation tank, a flocculant is added, and suspended substances in water flocculate to form flocs. The flocs and water formed in the flocculation tank are sent to the sedimentation tank, the flocs settle at the bottom of the sedimentation tank, and the supernatant liquid is discharged to the pond. In addition, the circulation device introduces the water from the pond, removes suspended matter by the filtration device, and guides the highly transparent water to the pond.

In the water purification system for a pond according to claims 3 and 4 of the present invention, the multipurpose water tank temporarily stores the cleaning drainage of the filtering device and the drainage generated by the cleaning of the pond, and these drainages are aggregated in appropriate amounts. Out into the tank.

In the water purification system for a pond according to claim 5 of the present invention, the water in the pond is introduced into the algaecide treatment tank of the multipurpose aquarium and the algaecide is added. The algicidal mixed water flows from the algalicidal treatment tank into the algalicidal reaction tank, and the algicidal reaction proceeds. The water after the algicidal treatment flows into the residual chlorine removing tank from the algalicidal reaction tank, and the residual chlorine removing agent is added. The residual chlorine removing agent mixed water flows into the residual chlorine eliminating tank from the residual chlorine removing tank,
The residual chlorine concentration decreases. Water with a low residual chlorine concentration is discharged to the pond.

In the water purification system for a pond according to claim 6 of the present invention, a ship can enter the multipurpose water tank.

[0015]

EXAMPLES Hereinafter, the pond water purification system of the present invention will be described in detail with reference to Examples. 1 to 3 are views showing an embodiment of a water purification system for a pond according to the present invention. In these drawings, reference numeral 1 is a water purification system for a pond (hereinafter abbreviated as system). This system 1 is for maintaining the amount and quality of water in a large-scale artificial pond by using seawater, and includes a water intake device 2, a coagulation tank 3, a sedimentation tank 4, a multipurpose water tank 5, and a circulation device 6. And a dehydrator 8.

The water intake device 2 pumps seawater to the flocculation tank 3 and includes a pump 7, a first pipe having one end located in seawater and the other end attached to the pump 7.
The second pipe has one end attached to the pump 7 and the other end connected to the coagulation tank 3. A backup pump (not shown) is provided as in the case of the pump 7. Also, one end of the first pipe in seawater is
A mesh plate is attached to prevent the pumping up of garbage.

The flocculating tank 3 is added with a flocculating agent such as polyaluminum chloride and a polymer for flocculating a suspended substance and a trace amount of heavy metal, and stirring is performed so that the suspended substance aggregates into flocs. Is.

In the settling tank 4, the flocs and water formed by staying in the flocculating tank 3 for a predetermined time are introduced, and the flocs settle. The flocs that settled down are dehydrator 8
And sent only the supernatant to the multipurpose water tank 5.

As shown in FIG. 2, the multipurpose water tank 5 is a rectangular parallelepiped which is used for multiple purposes, and is provided with partition walls inside and is composed of five rectangular parallelepiped tanks. The multipurpose water tank 5 includes a first tank (residual chlorine elimination tank) 11 and a first tank 1.
The second tank (alkali killing reaction tank) 12 of almost the same type as the first tank 11 adjacent to the long side of 1, the third tank 13 adjacent to the short side of the first tank 11, and the opposite of the third tank 13 First tank 11 and second tank 1 on the side
A fourth tank (residual chlorine removal tank) 14 adjacent to the short side of 2,
It is composed of a second tank 12 and a third tank 13 and a fifth tank (algaidic treatment tank) 15 adjacent thereto.

The first tank 11 is 1/1 as shown in FIG.
The bottom of the fourth tank 14 is deeply formed with a bottom having a gradient of 00 to 1/10, and a pit 11a for collecting sludge is formed on the fourth tank 14 side. This first tank 11 is the fourth tank 1
The partition wall 14a on the 4th side is higher than the partition wall 13a on the 3rd tank 13 side, and straightening walls 11b, 11b for partitioning the upper part of the 1st tank 11 are installed near the 3rd tank 13 and the 4th tank 14 in parallel with the partition walls. Has been. In this first tank 11, a pipe 21 for introducing the supernatant liquid from the precipitation tank 4 is attached near the fourth tank 14, and a pipe 24 for guiding sludge to the flocculation tank 3 is provided near the pit 11a. It is installed.

The second tank 12 is adjacent to the first tank 11, and a water gate 41 is formed on the opposite side of the first tank 11 for a pleasure boat in the pond to pass through. The second tank 12 has a diffuser tube attached to the bottom for aerating the inside of the tank. The second tank 12 is adjacent to the fourth tank 14 and the fifth tank 15, and the partition wall 14a with the fourth tank 14 is the partition wall 1 with the fifth tank 15.
It is formed higher than 5a. The second tank 12 has an area large enough for painting of a pleasure boat, etc.
The same rectification walls 12b and 12b as in 1 are attached, and a pedestal (not shown) for mounting a ship is provided. Further, on the fourth tank 14 side, a pipe 23 for introducing the supernatant liquid from the settling tank 3, a pipe 26 (first derivation means) for introducing the cleaning drainage from the filtration device 10, and a sludge collecting and floating dust. One end of the pipe 31 (third outlet means) for introducing the wastewater generated by the recovery of the water and the pipe 25 (second outlet means) for discharging the solid-liquid mixture in the second tank to the coagulation tank It is installed inside. These pipes 23, 28, 3
The valves 1 and 25 are attached and normally closed. Further, a pipe 40 is installed to make the water level equal to that of the pond, and the water of the pond flows in by opening the valve.

The third tank 13 draws out the water overflowing from the first tank 11 to the pond, and is equipped with a pipe 22 leading to the pond.

The fourth tank 14 is used for the addition of sodium thiosulfate, is equipped with a pipe 30 in which an aqueous solution of sodium thiosulfate is put, and the partition wall 14a between the first tank 11 and the second tank 12 is the outermost wall 5a. It is formed to be lower, and an air diffuser is attached to the bottom for aerating the inside of the tank.

The fifth tank 15 discharges the treated water using seawater to the pond when it is filled with water, and the water pumped from the pond is introduced at the time of algae killing treatment. This fifth tank 15
Is equipped with a pipe 28 connected to the circulation device 6, a pipe 29 in which an aqueous solution of sodium hypochlorite is put, and a pipe 27 for drawing water to a pond when filling water. An air diffuser for aerating the inside of the tank is attached to the bottom.

The circulation device 6 pumps up part of the water in the pond, filters it and returns the filtrate to the pond, and comprises an introduction device 9 and a filtration device 10. The introduction device 9 is a pump 9a.
The water in the pond is introduced into the filtration device 10 by driving the. The pump 9a is also connected to the pipe 28 for pumping water from the pond during the above-mentioned algae killing process. As the filtration device 10, a filtration device of a rapid filtration method that performs coagulation and sedimentation as a biological filtration method or pretreatment of filtration and performs filtration using sand or the like as a filter medium is used.

In the dehydrator 8, sludge is introduced from the settling tank 3 and the first tank 11 of the multipurpose water tank 5, the organic polymer coagulant is added, and the floc is reaggregated by stirring. Then, filtration is performed to make a dehydrated cake.

The system having such a structure normally takes in seawater, purifies it, and supplies it to the pond. As will be described below, when the filter is washed, when pond cleaning water is introduced, when water is filled, and when algae are abnormal. When they occur and when the ship is repaired, they operate differently.

In normal times, seawater is taken in, purified and supplied to the pond, and the circulating device 6 filters the water in the pond. First, as shown in FIG. 1, the water intake device 2 drives the pump 7 so that the first pipe pumps up seawater, and the second pipe sends the seawater to the coagulation tank 3. Add sodium hypochlorite in the first pipe.
In the coagulation tank 3, polyaluminum chloride and an organic polymer coagulant are added, and suspended substances in water coagulate to form flocs. In the settling tank 4, the solid-liquid mixture is introduced from the aggregating tank 3, flocs are settled, and the supernatant liquid is led to the first tank 11 of the multipurpose water tank 5. The flocs that have settled are led to the dehydrator 8. The first tank 11 of the multipurpose water tank 5 is
The supernatant liquid is introduced from the settling tank 4, and the fine solids in the supernatant liquid settle while moving from the fourth tank 14 side to the third tank 13 side. The sludge accumulated at the bottom is discharged to the dehydrator 8 and the highly transparent liquid overflows into the third tank 13 and the third tank 1
Derived from 3 to the pond.

When pouring water into the pond, in order to shorten the required number of days, the auxiliary pump is also operated to discharge a larger amount of water than the above-mentioned amount of water supplied to the pond. Then, the supernatant liquid from the precipitation tank 4 is introduced into the second tank 12 through the pipe 23, and the first tank 11
Similarly, the fine solids in the supernatant liquid are allowed to settle, and the highly transparent liquid is discharged from the fifth tank 15 to the pond.

When the filter material of the filter device 10 is clogged, it is washed in order to recover the filtration performance. The washing of the filter medium is performed by backwashing, for example, by aerating from the lower part of the filter medium to wash the filter medium. A large amount of wastewater generated by the backwashing is led to the second tank 12 of the multipurpose water tank 5 through the pipe 26. The second tank 12 temporarily stores a large amount of drainage and performs aeration so that sludge does not accumulate at the bottom. Then, an appropriate amount of waste water is led from the second tank 12 to the coagulation tank 3 by the pipe 25. At this time, the introduction from the pumping device 2 is stopped, and the water introduced from the second tank 12 is treated in the same manner as the above-mentioned water intake.

In order to maintain a good landscape, the sludge collected at the bottom of the pond and the floating dust are collected by the ship. At this time, a large amount of water is also collected at the same time. This large amount of waste water is led to the second tank 12 of the multipurpose water tank 5 through the pipe 31. The second tank 12 temporarily stores a large amount of drainage and performs aeration so that sludge does not accumulate at the bottom. Then, an appropriate amount of waste water is led from the second tank 12 to the coagulation tank 3 by the pipe 25. At this time, the pumping device 2
The water introduced from the second tank is stopped, and the water introduced from the second tank is treated in the same manner as the above-mentioned water intake.

When a large amount of algae occurs in the water of the pond due to changes in the weather, etc., algae killing treatment is performed. For example, when algae is killed with sodium hypochlorite, sulfuric acid and hydrochloric acid are generated to increase the residual chlorine concentration, and if the raw water is led to the pond, aquatic organisms in the pond decrease. For this reason, the following treatment for reducing the residual chlorine concentration is performed after the algae killing treatment. First, the algae and water in the pond are introduced into the aquarium introducing device 16
It is introduced from the pipe 28 of No. 5 to the fifth tank (algarid treatment tank) 15. An aqueous solution of sodium hypochlorite, which is an algaecide, is added to the fifth tank 15 through a pipe 29, and is aerated and mixed by an air diffuser at the bottom. This algaecide mixed water overflows the partition wall from inside the fifth tank 15 and flows into the second tank (reaction tank for algaecide) 12. In the second tank 12, air is aerated by the diffuser at the bottom, and the algicidal reaction proceeds. The water that has stayed in the second tank 12 for a predetermined time flows over the partition wall and is introduced into the fourth tank (residual chlorine removal tank) 14. In the fourth tank 14, an aqueous solution of sodium thiosulfate, which is a residual chlorine removing agent, is added from a pipe 30 and aerated by an air diffuser at the bottom and agitated and mixed. The water mixed in the fourth tank 14 overflows the partition wall and goes to the first tank (residual chlorine elimination tank).
Enter within 11. In the first tank 11, while the solid-liquid mixture overflowing from the fourth tank 14 moves to the third tank 13 side, residual chlorine is erased, and the solid content is settled to clear water. Overflow into Santan 13. The third tank 13 draws clean water to the pond.

It is necessary to paint the bottom of the excursion boat in the pond regularly. The multipurpose water tank 5 is used as a dock for a pleasure boat. First, the water level of the second tank 12 is made the same as the water level of the pond by the pipe 40 communicating with the second tank 12 of the multipurpose water tank 5 and the pond, and the water gate 41 is opened to enter the pleasure boat into the second tank 12. Let Then, the water gate 41 is closed and the water in the second tank 12 is led to the coagulation tank 3 through the pipe 25. Second tank 1
2 is provided with a gantry, and the boat is put on the gantry when the water level is lowered as the water in the second tank 12 is discharged.
Further, when a large amount of drainage is generated by the painting work, it can be led out from the second tank 12 to the coagulation tank 3 by the pipe 25. After the completion of painting and the like, the water level of the second tank 12 is made the same as the water level of the pond by the pipe 40 again, the water gate 41 is opened, and the ship is moved from the second tank 12 to the pond.

According to the pond water purification system 1 as described above, the cost of water supply can be reduced as compared with the case of using tap water or the like. In addition, the multipurpose water tank 5 can effectively perform algae killing treatment and drainage treatment. In addition, by using the multipurpose water tank 5 for multiple purposes, the installation area of the equipment can be reduced, and the cost for constructing the equipment can be reduced, as compared with the case of providing separate devices.

Further, in such a water purification system for a pond, since the multipurpose water tank is a unit, it can be easily installed and attached.

Although the water intake source is the sea area in the above-mentioned embodiment, a lake or a river may be the water intake source. Further, in the multipurpose water tank of the system of the present invention, a pipe for discharging water from above the first tank 11 may be provided to clean the sludge accumulated at the bottom.

[0037]

According to the water purification system for a pond of claim 1 of the present invention, a pumping device for pumping water from the sea, a lake or a river, and a suspended solid in the water into which the pumped water is introduced. A flocculation tank for flocculation, a settling tank for introducing a solid-liquid mixture from this flocculation tank to settle the flocculated solids, and discharging the supernatant liquid to the pond, and a part of the water in the pond is pumped up to remove the solids, Since the circulation device is equipped with a filtration introduction device for introducing water from the pond and a filtration device for performing filtration and returning the filtrate to the pond, tap water such as tap water is used. It is possible to supply good water at low cost compared with the case where it is used. In addition, since the circulation device constantly filters the water, it is possible to obtain a pond with a good landscape and high transparency.

According to the pond water purification system of the third and fourth aspects of the present invention, there is provided a drainage means for sending the cleaning drainage of the filtration device and the drainage produced by the collection of sludge and the collection of floating dust to the multipurpose water tank. Since it has a derivation means for sending the wastewater in the multipurpose water tank to the coagulation tank in appropriate amounts, it does not require a special device for treating these wastewater, saves space, and reduces the construction cost. Can be reduced.

According to the fifth aspect of the present invention, there is provided a water tank introducing device for introducing pond water into the multipurpose water tank. The multipurpose water tank introduces the water from the pond. With the algaecide treatment tank, algaeicidal reaction tank into which water from this algaecide treatment tank flows in, and water from this algaecide reaction tank into which a residual chlorine removing agent is introduced It consists of a residual chlorine removal tank and a residual chlorine elimination tank into which water from the residual chlorine removal tank flows and stays in the tank for a certain period of time to the pond, so when a large amount of algae is generated due to changes in the weather, etc. Since a multipurpose water tank can perform algae killing treatment and residual chlorine removal, it can respond to abnormalities promptly and can be a pond with water of high transparency at all times.
In addition, it does not require a special device for processing, saves space, and can reduce construction costs.

According to the water purification system for a pond of claim 6 of the present invention, since the water gate for passage of a ship is formed in the multipurpose water tank, it is not necessary to separately provide a dock,
Space is saved and construction costs are reduced.

In addition to the above-mentioned various effects, when various uses are carried out in a multipurpose aquarium, equipment for treating unsteady problems peculiar to maintaining the water quality of a pond becomes space-saving, and construction cost of the equipment is reduced. .. Due to these synergistic effects, it is possible to provide a water purification system for a pond having a further excellent effect.

[Brief description of drawings]

FIG. 1 is a schematic piping diagram showing an embodiment of a pond water purification system of the present invention.

2 is a plan view of a multipurpose aquarium of the pond water purification system shown in FIG. 1. FIG.

FIG. 3 is a cross-sectional view of a multipurpose water tank of the pond water purification system shown in FIG.

[Explanation of symbols]

 1 Water Purification System for Pond 2 Pumping Device 3 Coagulation Tank 4 (First) Settling Tank 5 Multipurpose Water Tank 6 Circulation Device 9 Filtration Introduction Device 10 Filtration Device 16 Water Tank Introduction Device 11 First Tank (Algae Treatment Tank) 12 Second tank (reaction tank for algaecide) 13 Third tank (residual chlorine removal tank) 14 Fourth tank (residual chlorine elimination tank) 26 First derivation means 25 Second derivation means 31 Third derivation means 41 Water gate

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical indication location C02F 1/58 L 1/76 A 9045-4D E02B 3/00 7150-2D (72) Inventor Oak Takanobu Uchi 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Takahiro Yoshigae 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd.

Claims (6)

[Claims] 1. A pumping device for pumping water from the sea, lakes or rivers, a flocculation tank for introducing the pumped water to flocculate suspended solids in the water, and a solid-liquid mixture introduced from the flocculation tank. It consists of a settling tank that settles the coagulated solids and draws out the supernatant liquid to the pond, and a circulation device that pumps a part of the water in the pond and removes the solids to return it to the pond. A water purification system for a pond, comprising: an introducing device for filtration, and a filtering device that performs filtration and returns the filtrate to the pond. 2. A pumping device for pumping water from the sea, lake or river, a flocculation tank for introducing the pumped water to flocculate suspended solids in the water, and a solid-liquid mixture introduced from the flocculation tank. A first settling tank for settling the aggregated solids, a multipurpose water tank for introducing the supernatant of the first settling tank to further settle the solids, and discharging the supernatant to the pond, and a part of the pond water It is characterized by comprising a circulation device for removing the pumped solids and returning it to the pond, wherein the circulation device comprises an introduction device for introducing water from the pond and a filtration device for performing filtration and returning the filtrate to the pond. Pond water purification system. 3. The water purification system for a pond according to claim 2, wherein first derivation means for sending the cleaning drainage of the filtering device to the multipurpose water tank, and an appropriate amount of wastewater in the multipurpose water tank are sent to the coagulation tank. A water purification system for a pond, comprising a second derivation means. 4. The water purification system for a pond according to claim 2, wherein the third discharge means for sending the wastewater generated by the collection of sludge and the collection of floating dust to the multipurpose water tank, and the wastewater in the multipurpose water tank. A water purification system for a pond, comprising: a second lead-out means for sending an appropriate amount to the coagulation tank. 5. The pond water purification system according to claim 2, further comprising an aquarium introducing device for introducing pond water into the multipurpose aquarium, wherein the multipurpose aquarium introduces pond water and kills algae. The algaecide treatment tank that contains the agent, the algaecide reaction tank into which the water from the algaecide treatment tank flows, and the residual chlorine removal agent into which the water from the algaecide reaction tank enters and contains the residual chlorine removal agent A water purification system for a pond, which comprises a tank and a residual chlorine elimination tank in which water from this residual chlorine removal tank flows in and stays for a predetermined time to reduce the residual chlorine to the pond. 6. The water purification system for a pond according to claim 2, wherein the multipurpose water tank is provided with a water gate for passage of a ship.