JPH0519603B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is applicable to relatively shallow waters (for example, about 3 m deep).
This invention relates to water purification methods in lakes, ponds, ponds, rivers, and water storage facilities for water purification.

(Prior art) Conventionally, in dams, lakes, marshes, rivers, etc., as water temperature rises, algae breeds, fish die due to lack of oxygen in the water, bad odors occur, and water quality deteriorates due to other causes. However, there was no effective prevention method, and for example, filtration using activated carbon was considered. In addition, in deep dams, lakes, etc., attempts have been made to kill algae and increase the amount of dissolved oxygen by forcing the water in the dam to move upward and downward using intermittent air pumping devices, with considerable success. It was contained.

When the water depth is large, surface water and deep water stagnate, sending algae that grow abundantly on the surface to a dark place at the bottom of the water, weakening and killing the algae to prevent their proliferation, The purpose of algaecide was also achieved.

(Problems to be Solved by the Invention) However, even if a water pump is installed in shallow water and water is convected, the algae on the water surface will only move slightly downward, and it will be impossible to kill them. Furthermore, most of the sewage is caused by fine solid matter floating in the water, but there is no way to efficiently precipitate this, and there is no way to improve oxygen deficiency.

Conventionally, the technology of mixing a flocculant into a muddy water tank to flocculate and precipitate solids was known, but
Since there was no means to stir and mix flocculants and the like in lakes and ponds with large water volumes of millions of tons or more, it was not possible to put the above technology into practical use.

(Means for Solving Problems) Therefore, the present invention aims to create a water depth at a predetermined depth such as a lake, a pond, or a water storage field (if there is a deep place by chance, then artificially create it at that location, for example, 2m).
(Possible if the above is possible) By installing a water pump and dispersing the flocculant or algaecide, or the flocculant and algaecide during the process of circulating and flowing water through the water pump, suspended solids can be removed. The purpose of water purification is achieved relatively easily by coagulating sedimentation or precipitating solid matter and killing algae.

Examples of the flocculant mentioned above include aluminum sulfate, polyaluminum chloride, and other polymer flocculants, and examples of the algaecide include copper sulfate or copper chloride.

In addition, since the water pump operates more efficiently in water depths of 2 m or more due to the convective circulation of water, it is desirable that the top layer and the lower layer have a shape that facilitates convection, as shown in FIG. 1, for example. Therefore, in order to make the water depth the required depth, the water bottom can be artificially excavated (for example, by using a sand pump) to form the water bottom shape as shown in FIG.

When the flocculant or algaecide is applied as a liquid, the purpose can be achieved by placing a liquid supply pipe facing a part of the water pump and supplying a predetermined amount of the liquid as shown in Figure 1. You can also do that. In the above, we explained about installing a water pump in a lake, pond, etc., but it is also possible to lead the required amount of treated water from the lake, pond or river to a water storage field, install a water pump in the water storage field, The solids may be precipitated, or the solids may be precipitated and algaecide simultaneously or sequentially.

Further, when the flocculant is given in solid form, it is possible to diffuse it to the required concentration by floating a container containing the agent above the water pump and dissolving and dispersing it as appropriate.

In addition, the appropriate concentration of the algaecide is 0.2 ppm to 1.0 ppm. It was confirmed that at this level of concentration, the purpose of algaecide was achieved without killing fish etc.

(Function) That is, according to the present invention, since the flocculant and the algaecide are diffused simultaneously or separately, fine solids in the water are precipitated, algae are killed, and the amount of dissolved oxygen in the water is reduced by the action of the water pump. can be improved.

Embodiment 1 Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

In Figure 1, the bottom of the water at a depth of 5 m (dashed line 37) is excavated as shown by the solid line 37a, and the deepest part is 7 m.
Then, the water pumping cylinder 1 is installed in that part. This water pump 1
The installation location varies depending on the water volume, water depth, and shape of the water bottom, but for example, one water pump with a diameter of 50 cm is installed for every 300,000 to 500,000 tons of water volume. In the case of Fig. 1, the pumped water is spread to the left and right as shown by arrows 38 and 38a, descends from the water surface to the bottom, crawls through the bottom, reaches pumping tube 1, is pumped up again as before, and repeats this process. It turns out. Further, FIG. 2 shows the installation positions of the pumping cylinders 1, 1a, 1b, and 1c with respect to the lake 40. Next, as shown in FIG. 3, an artificial waterway 39 is created extending from the chain line 43 to the discharge channel 42 on one side of the lake 41, and the water pumps 1, 1a are installed only in this area. In any case, the system is designed to purify all the water that passes through it.

Embodiment 2 Next, an embodiment of the present invention will be described based on the apparatus shown in FIGS. 4 to 6.

A copper sulfate container 3 and a flocculant container 3a are arranged in a circular shape above a water pump 1 having an air chamber 2 at the bottom (for example, between the water surface and the upper end of the water pump 1), and a float 4 is used to collect sulfuric acid. The copper and flocculant containers 3, 3a are stabilized at a predetermined water depth. For example, the lower side of the copper sulfate and flocculant containers 3, 3a and the upper end of the water pump 1 are connected with a cable 5, and the float 4 and the copper sulfate and flocculant containers 3, 3a are connected with a cable 6. Determine the position. The copper sulfate and flocculant containers 3, 3a are formed by fixing a mesh bag 8 to the inside of ring-shaped inner and outer frames 7, 7a, and the mesh bag 8 accommodates copper sulfate and flocculant 9, 9a. The amounts of copper sulfate and flocculants 9, 9a are determined depending on the water volume and quality of the dam 10 (or lake, marsh, etc.) where the pumping tube 1 is installed, and the number of pumping tubes. Make the mesh dense so that it does not dissolve at a concentration higher than necessary. In other words, if it dissolves at the calculated rate, the amount of water multiplied by 0.2 ppm will suffice, but considering the rapid solubility, it is usually recommended to install it at a fraction of the required amount. preferable. Considering the agitation efficiency of the water pump and the diffusion rate of the algaecide or coagulant, it would be ideal if the algaecide would be distributed throughout the entire water area of the dam when all of the installed algaecide is dissolved.

The algaecide container of the present invention is illustrated in FIG. 5, and as described above, a mesh bag 8 is fixed inside the ring-shaped inner and outer frames 7, 7a, and copper sulfate or a flocculant is poured into the mesh bag 8. When the water rising in the water pumping tube 1 flows in all directions as shown by arrows 11 and 11 in FIG. 4, it passes through the mesh bag 8 and dissolves the copper sulfate or flocculant. However, it is difficult to adjust the solubility in such containers, and it is necessary to prevent excessive dissolution by using a mesh in advance.

In the above embodiment, by installing algaecide and flocculant containers around the upper part of the water pump,
The required concentration of algaecide and flocculant was generated and diffused. However, if the algaecide and flocculant are to be given in liquid form, an algaecide nozzle is installed inside the middle part of the water pump 1, and the pipe The required amount of algaecide, etc. may be supplied through the 13. In this case, the flocculant can be fed first and then the algaecide.
In the figure, 12 is a chemical tank.

The water pumping device used in this invention has an air chamber 2 at the lower end of a water pumping cylinder 1, into which pressurized air is fed from an air pipe 16 as shown by an arrow 17. When the time comes,
The pressurized air is first sent into the outer cylinder chamber 18, and is gradually accumulated from the top of the outer cylinder chamber 18, lowering the water level in the outer cylinder chamber 18, and flowing through the through hole 20 provided in the upper part of the partition cylinder 19. The water enters the intermediate chamber 22 as shown in Fig. 21 and lowers the water level in the intermediate chamber 22. Next, when the water level reaches the position indicated by the chain line 23 in FIG. The water rises through the inner cylinder chamber 27 as shown by the arrow 28, and is ejected from the upper part of the tank through the communication hole 29 into the water pumping cylinder 1 as shown by the arrow 30. Therefore, the pressurized air becomes an air mass 31 and rises inside the water pump, so the water at the bottom of the water pipe rises as the air mass rises as shown by arrow 15, blows out from the upper end of the water pipe 1, and rises as shown by the arrow 15. As shown in Figure 11, it flows in the horizontal direction (Figure 4), but some of this water passes through the copper sulfate or flocculant container, so the copper sulfate, etc. contained therein is sequentially dissolved, and the dissolved liquid is mixed with water. Diffusion as the flow progresses, and arrows 33, 33 as the vertical convection
As shown in a, it also descends to the bottom of the water, further weakening the weakened algae as it descends near the bottom, and eventually kills them. In the figure, 32 is a pressurized air hose, 35 is a weight,
36 is a float provided at the upper end of the water pump 1.

(Effects of the Invention) That is, according to the present invention, water is circulated up and down using the water pumping cycle of the water pump, and in the process, algaecide and/or flocculant are added and dispersed, so that no aeration is required. At the same time, it has the effect of easily and reliably purifying large amounts of water by diffusing chemicals, increasing the amount of dissolved oxygen, precipitation of fine solids, and killing algae.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the present invention in its implementation state;
Figure 2 is a plan view of the device installed directly in a lake, Figure 3 is a plan view of a water purification section installed in a lake, Figure 4 is a front view of a drug container installed above the water pump, FIG. 5 is an enlarged front view with a portion of the algaecide and flocculant container cut away, and FIG. 6 is a partially enlarged sectional view of the air chamber. 1, 1a, 1b, 1c... Water tank, 2... Air chamber, 3, 3a... Copper sulfate and flocculant container, 4
0,41... Lake, 42... Spillway.

Claims (1)

[Claims] 1. In the process of circulating water up and down in a water pump such as a lake, marsh, reservoir, or river, a flocculant and an algaecide are added and dispersed by the water flow, thereby causing suspension. A method for effusion in shallow water, characterized by treating effluent by coagulating and precipitating solids and killing algae, and improving the amount of dissolved oxygen in water. 2 In the process of circulating water up and down in water to be treated, such as lakes, marshes, reservoirs, or rivers, using water pumps, a flocculant or algaecide is added and dispersed by the water flow, which causes suspended solids to coagulate and settle. , or a water purification method for shallow water, characterized by purifying water by killing algae and improving the amount of dissolved oxygen in the water. 3. The water purification method in shallow waters according to claim 1, wherein the flocculant or algaecide is diffused simultaneously or individually sequentially. 4. The water purification method in shallow waters according to claim 1, wherein the flocculant is polyaluminum chloride, aluminum sulfate, or other polymer flocculant. 5. The method for sterilizing water in shallow waters according to claim 1, wherein the algaecide is copper sulfate or copper chloride.