JP3907751B2 - Purification channel system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a purification channel system for improving the water quality of a river in which water flows slowly and stays like a river in a plain.
[0002]
[Prior art]
In rivers in the plains, the difference in height between the upstream and downstream is small, and the flow of water is originally gentle, and sluices are formed at the confluence of other rivers, etc. Since runoff is controlled, there is no difference in elevation from the sea level, and water flows back and forth in the river due to tides, water may stay in the river for a long time.
In such rivers, organic pollutants, nutrients such as nitrogen and phosphorus accumulate in the water area, and may be a source of malodors rather than a storm that worsens the landscape.
Therefore, conventionally, due to the spread of sewerage, etc., the inflow of organic pollutants into rivers has been reduced, and river purification has been promoted, and some improvement has been observed.
[0003]
[Problems to be solved by the invention]
By the way, in urban areas, as it becomes difficult to secure quantitative greenery such as securing parks and conservation of forested areas, the needs of citizens who want to get close to the soil and nature are gradually increasing, moisture of the season, comfort, etc. Therefore, improvement in the quality of green has come to be demanded, and it is demanded that the river in the city area should be a space close to water and green, not a space partitioned by a concrete revetment.
[0004]
However, even though the river has been purified as described above, it cannot be said that the river has been sufficiently purified. In order to increase the hydrophilicity of the river, further river purification has been required.
Especially in rivers where the amount of stored water is large compared to the amount of inflow water due to sluice gates and other factors, and water circulation is poor, due to the widespread use of sewers as mentioned above, clean water flows to some extent, organic pollutants, Even if the amount of inflow of nutrients such as nitrogen and phosphorus decreases, organic pollutants may still accumulate without being purified by the natural purification function.
[0005]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a purification channel system capable of purifying a river and improving the hydrophilicity of the river in a river with poor water circulation as described above. It is what.
[0006]
[Means for Solving the Problems]
Purification waterway system of the present invention is intended to improve the quality of rivers, it will be provided with water channel provided along the river, and water purification means provided in the aqueous path, the waterway A water intake is provided on the downstream side of the river, a water discharge port is provided on the upstream side of the river, and the water of the river taken from the water intake is directed from the water intake to the water discharge port. The water flowed through the water channel and purified by the water purification means, and the water discharged from the discharge port into the river is taken along the flow of the river from the discharge port side upstream of the river. The solution to the above-mentioned problem was to flow to the mouth side.
[0007]
According to the above configuration, water is purified by the water quality purification means, and the natural purification function is enhanced by stirring by discharging the purified water, increasing the dissolved oxygen concentration, and the like. In particular, when the water is discharged, the purified water is returned to the river as a waterfall or fountain, so that the agitation effect can be enhanced and the natural purification function can be further enhanced. In addition, the water taken from the downstream side of the river is purified and released to the upstream side of the river, so that the water in the slow-flowing river can be purified while being circulated. The water quality can be gradually improved.
[0008]
Therefore, in the purification channel system, the water is purified by the water purification means provided in the channel, the water is purified by enhancing the natural purification function of the river, and further, the purification is performed by circulating the water of the slow-flowing river. Since the water quality of the slow-flowing river is gradually improved, the water can be purified at a small cost.
As the water purification means, various known purification devices can be used.
In addition, in order to allow water to flow in the direction opposite to the river in the waterway, it is necessary to pump up water with a pump or the like at the intake side, or pump up water with a pump or the like at the discharge side and discharge it. The means for flowing water is not particularly limited.
Moreover, in order to draw up water, it is good also as what uses a watermill and a windmill.
In addition, when water is discharged, the water is released in a waterfall shape, or released in the form of a fountain, by stirring the water and increasing the dissolved oxygen concentration, further enhancing the natural purification function, Waterfalls and fountains can increase the hydrophilicity of rivers.
[0009]
Further, the purification channel system of the present invention is an electrolysis / aggregation device in which the water purification means has an electrode containing aluminum to collate phosphate ions in water and aggregate particles floating in the water. And a means for solving the above-mentioned problems, comprising an inter-gravel contact tank for filtering and removing organic substances using a gravel material to which microorganisms adhere, and an adsorption unit comprising a large number of bags containing an adsorbent.
[0010]
According to the above configuration, in an electrolysis / aggregation apparatus having an electrode containing aluminum, the colloidal aluminum phosphate can be converted to phosphate ions, which is one of the causes of eutrophication, by aluminum ions eluted by electrolysis. it can. Further, the aluminum hydroxide generated by electrolysis promotes the aggregation (floc formation) of the soil particles suspended in water and the colloidal aluminum phosphate particles generated as described above.
That is, particles such as phosphate ions and soil particles become flocs and are easily separated and removed from water.
[0011]
These flocs are filtered by gravel material in the gravel contact tank. In the contact tank between gravel, algae, protozoa and other microorganisms adhere to the surface of the gravel material, and organic matter contained in water is removed by these organisms.
Further, in the adsorption unit, for example, a nitrogen compound or the like is adsorbed on the adsorbent, and water is further purified.
In the adsorption unit, since the adsorbent is packed in the bag, the adsorbent can be prevented from flowing out and the adsorbent can be easily exchanged for each bag. Moreover, since water can pass between the bags, the water channel is not completely blocked.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Below, an example of an embodiment of the invention is explained with reference to drawings about a purification channel system.
FIG. 1 is a drawing for explaining a schematic configuration of a purification channel system of this example.
As shown in FIG. 1, the purification water channel system of this example is for purifying water in a moat 1 that forms part of a river, and includes a water channel 2 provided along the moat 1, The first, second and third purification devices 3, 4, 5 provided in the above.
In FIG. 1, the water channel 2 is illustrated as three blocks corresponding to the purification apparatuses 3, 4, and 5, but the actual water channel 2 does not need to be divided into three blocks.
Further, the water channel 2 is hidden in the revetment and has a tunnel shape.
[0013]
In addition, the water channel 2 has a water intake 2 a connected to the downstream end of the moat 1, a discharge port 2 b connected to the upstream end of the moat 1, and the direction of water flow in the water channel 2 and the water in the moat 1. The direction of flow is reversed.
As described above, the moat 1 is a part of the river, and the downstream end and the upstream end thereof are connected to the river, but the upstream end flows in from the river. The amount of water to be produced is small compared to the amount of water stored in the moat 1, and the flow in the moat 1 is extremely slow.
[0014]
In the water channel 2, the water intake 2 a side has a higher water gradient than the discharge port 2 b, and water is pumped from the downstream end of the moat 1 a by the pump 6 (shown in FIG. 3). Water is allowed to flow through the water channel 2.
Accordingly, in the water channel 2, the water pumped from the downstream end portion of the moat 1 flows from the intake port 2 a to the discharge port 2 b and is discharged from the discharge port 2 b to the upstream end portion of the moat 1. Since water flows to the downstream end of the moat 1, water having a flow rate corresponding to the flow rate of the water channel 2 also flows from upstream to downstream in the moat 1. The moat 1 flows at a flow rate to which the flow rate is added.
Moreover, in the discharge port 2b, the water discharged from the water channel 2 to the moat 1 using a pump etc. is made into a waterfall shape or a fountain shape.
[0015]
The first purification device 1 is an electrolysis / aggregation device, and includes an electrode portion 8 and a power supply unit 9 provided immediately behind the water intake 2a of the water channel 2 as shown in FIGS. Is.
As shown in FIG. 3, the electrode section 8 is composed of a plurality of electrode plates 8 a provided along the flow of water behind the water intake 2 a of the water channel 2, and the electrode plates 8 a. A voltage is applied from the unit 9.
The electrode plates 8a are made of aluminum or an aluminum alloy.
[0016]
In addition, as described above, water is pumped up by the pump 6 from the water intake port 2 a connected to the moat 1, and the pumped water passes through the electrode unit 8 and passes through the electrode unit 8. A voltage is applied to water by the electrode plates 8a.
At this time, as shown in FIG. 4, the phosphate ions dissolved in the water pumped up from the moat 1 react with the aluminum ions eluted from the electrode plates 8a, and colloidal aluminum phosphate particles. become.
Aggregation of particles suspended in water (floc formation) such as soil particles in water and colloidal aluminum phosphate particles as described above by aluminum hydroxide generated by electrolysis using an aluminum electrode Is promoted.
[0017]
Therefore, in the first purification device 3, the phosphate ions dissolved in water, which cause eutrophication, become colloidal aluminum phosphate particles, and the particles floating in the water are relatively large lumps. It becomes f and it will be in the state which is easy to filter.
The first purification device 3 is provided with an aeration device 10 as shown in FIG. 3 for cleaning the electrode plate in the above-described electrolysis / aggregation device. Aeration is performed by supplying air to the apparatus 10.
[0018]
As shown in FIG. 5, the second purification device 4 is a contact tank between gravel, and is in a state where a large number of gravel materials (crushed stones, stones, etc.) 12.
And the floc f ... formed as mentioned above is filtered when water passes the contact tank between gravel which consists of gravel materials.
In addition, living organisms such as protozoa and algae are attached to the surface of the gravel material 12. When the water passes, organic pollutants contained in the water are taken in by the organism and the organic matter is removed from the water. It has come to be.
[0019]
As shown in FIG. 6, the third purification device 5 is a nitrogen adsorption unit, and has a high adsorption capability for the well-known porous waste material 13 used as an impact buffer material and nitrogen compounds that are nutrient salts. A well-known soil material 14 is packed in a sandbag 15, and the sandbag 15 is filled in the water channel 2 in a state where a large number of sandbags 15.
By this third purification device 5, nitrogen compounds, other substances dissolved in water, and particles that have floated in the water and could not be filtered in the gravel contact tank are adsorbed to the porous waste material 13 and soil material 14. Will be.
[0020]
Further, the porous waste material 13 and the soil material 14 are not filled in the water channel 2 as they are, but are filled after being packed in the sandbag bag 15, so that the porous waste material 13 and the soil material together with the sandbag bag 15 are filled. 14 can be easily replaced.
Further, since water can flow between the sandbag bags 15, the water channel 2 itself is not clogged even if the porous waste material 13 and the soil material 4 are clogged.
[0021]
According to the purification channel system as described above, the water taken from the moat 1 to the channel 2 is converted into colloidal aluminum phosphate by converting the phosphate ions, which are mainly nutrients, into colloidal aluminum phosphate by the first purification device 3. Floating particles, such as aluminum phosphate, are aggregated to form floc f. In the second purification device 4, the above-mentioned floc f is filtered by the filled gravel material 12... Organic matter is removed by the organisms attached to the surface, and in the third purification device 5, nitrogen compounds and other substances that are nutrient salts are adsorbed and removed by the porous waste material 13 and the soil material 14. It will be.
Accordingly, by pumping the water from the moat 1 through the water channel 2 and removing it, nutrient salts such as phosphorus and nitrogen, organic pollutants, and other particles are removed, and the purified water is discharged into the moat 1. It will be.
[0022]
Moreover, by discharging water from the water channel 2 as described above, the water in the moat 1 can be agitated to increase the dissolved oxygen concentration, thereby increasing the natural purification capacity of the moat 1. In particular, when water is discharged, it is possible to enhance the natural purification ability of the moat 1 by increasing the agitation effect by forming a fountain or waterfall.
And by improving the natural purification ability of the moat 1, accumulation of organic pollutants in the moat 1 and nutrient salts such as nitrogen and phosphorus can be prevented.
Further, as described above, if water is circulated through the water channel 2 and the moat 1, the water quality of the moat 1 can be gradually improved by purifying the water.
Therefore, the purification capability of the first, second, and third purification devices 3, 4, and 5 provided in the water channel 2 is improved by improving the natural purification capability and gradually improving the water quality while circulating the water. Even if there is a limit, the water quality of the moat 1 can be improved.
[0023]
As described above, the water in the moat 1 can be reliably purified by removing organic pollutants and nutrient salts such as nitrogen and phosphorus in the water channel 2.
That is, according to the purification channel system of this example, not only removing pollutants in the moat 1 but also improving the natural purification capacity of the moat 1 and purifying the water while circulating it. Since accumulation can be prevented, purification of water can be promoted at low cost, and the purified water can be prevented from being contaminated again.
[0024]
The purification device provided in the water channel 2 is not limited to the first, second, and third purification devices 3, 4, and 5 described above, and other purification devices may be used. Moreover, it is good also as what combines another purification apparatus with the 1st, 2nd and 3rd purification apparatuses 3, 4, and 5 among 1st, 2nd and 3rd purification apparatuses 3, 4, and 5 It is possible to use only a part of the purifying devices, or a part of the first, second and third purifying devices 3, 4, 5 and other purifying devices 3, 4, 5. It is good also as what combines.
[0025]
【The invention's effect】
According to the purified water channel system of the present invention , river water is led to the water channel and purified by the water quality purification means in the water channel, and the water purified in the water channel is discharged into the river and the water channel The water on the downstream side is returned to the upstream side, and the water in the slow-flowing river is purified while being circulated. Therefore, in the purification channel system, the water quality in the slow-flowing river can be gradually improved by circulating the water in the slow-flowing river, and the river water can be released by purifying the purified water. Since the water can be purified by stirring and enhancing the natural purification function of the river, the water can be purified at a small cost.
[0026]
Furthermore, according to the purification channel system of the present invention , in the electrolysis / aggregation apparatus, the phosphate ions become colloidal aluminum phosphate, and the aluminum particles generated by electrolysis cause soil particles floating in water or the above-mentioned Aggregation of the aluminum phosphate particles thus produced is promoted. In addition, in the contact tank between gravel, suspended matter such as flocs generated by the above-mentioned aggregation is filtered by the gravel material, and algae, protozoa and other organisms adhere to the surface of the gravel material, and these organisms Organic substances contained in the water are removed.
[0027]
Further, in the adsorption unit, for example, a nitrogen compound or the like is adsorbed on the adsorbent, and water is further purified.
That is, according to the purification channel system, nutrient salts such as phosphate ions and nitrogen compounds, organic pollutants, and the like can be removed from the water passing through the channel.
In the adsorption unit, since the adsorbent is packed in the bag, the adsorbent can be prevented from flowing out and the adsorbent can be easily exchanged for each bag. Moreover, since water can pass between the bags, the water channel is not completely blocked.
[Brief description of the drawings]
FIG. 1 is a schematic diagram for explaining a purified water channel system according to an example of an embodiment of the present invention.
FIG. 2 is a schematic perspective view showing a first purification device of the purification water channel system of the above example.
FIG. 3 is a block diagram for explaining a first purification device of the above example.
FIG. 4 is a drawing for explaining the operation of the first purification device of the above example.
FIG. 5 is a drawing for explaining a second purification device of the above example.
FIG. 6 is a drawing for explaining a third purification device of the above example.
[Explanation of symbols]
1 Moat that forms part of a river (river)
2 Water channel 2a Water intake port 2b Outlet port 3 First purification device (electrolysis / coagulation device)
8 Electrode part 8a Electrode plate 4 Second purification device (gravel contact tank)
5 Third purification device (adsorption unit)
12 Gravel material 13 Porous waste material (adsorbent)
14 Soil material (adsorbent)
15 sandbag

Claims (1)

A purification channel system to improve water quality in rivers .
Comprising a water channel provided along the river, and water purification means provided in the water channel,
The intake of the waterway is provided downstream of the river, the outlet of the waterway is provided upstream of the river,
Water from the river taken from the water intake of the water channel was flowed from the water intake to the discharge outlet and purified by the water purification means, and discharged from the discharge outlet to the river. A purification channel system in which water flows along the flow of the river from the discharge outlet side upstream of the river to the downstream intake side.
The above water purification means has an electrode containing aluminum to insolubilize phosphate ions in water, and aggregates particles floating in water, and filtration and organic matter by gravel material to which microorganisms adhere A purification channel system comprising a contact tank between gravel for removing water and an adsorption unit comprising a large number of bags containing adsorbents .

Images