JP4067690B2 - Purification methods for lakes and ponds - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for purifying lakes and ponds.
[0002]
[Prior art and problems to be solved by the invention]
In recent years, interest in the living environment has increased, and it is particularly desirable to clean water that is indispensable for the maintenance of life.
Conventionally, water from lakes and ponds has been used as drinking water, and this drinking water is obtained by adding necessary treatment to the raw water and purifying it. As the means of water purification treatment, (1) aggregation to solid suspension, solid-liquid separation, (2) coagulation to dissolved components, oxidation, biological transformation, adsorption, ion exchange, (3) aggregation filtration to bacteria and viruses , Sterilization, (4) neutralization of acids and alkalis, etc., which are used in combination according to the purpose.
[0003]
In general, groundwater does not contain any objects to be removed and the water quality is good, so water is supplied only by chlorine sterilization, but the water in lakes and ponds is purified water to remove viscous colloids, algal plankton, and naturally derived contaminants. And is purified by a slow filtration system or a rapid filtration system.
In the slow filtration method, in addition to the physical filtration of suspensions, the oxidation, adsorption, decomposition, predation of underwater bacteria, and the oxidation, adsorption, and decomposition of ammonia, iron, manganese, organic and odorous components by microorganisms that propagate on the surface layer, and Nitrogen components are stabilized by bacteria within the sand layer.
The rapid filtration method is a purification method in which a viscous colloid and a color colloid in water are aggregated by adding a positively charged flocculant, and then the aggregated product is separated by precipitation and filtration. As the flocculant, aluminum salts are mainly used, and iron salts and polymer substances are used in part. Even in the rapid filtration method, some dissolved contaminants are purified in the process of agglomeration, precipitation, and filtration by the combined use of an oxidizing agent, adsorption to aluminum hydroxide, and coagulation. In addition, for excessive contamination and off-flavor, there are cases where processes of oxidation by ozone and adsorption by activated carbon are added.
[0004]
Physiologically safe water for drinking or delicious water is water that contains moderately dissolved minerals from rocks. When ultrapure water is required, pure water having a required water quality level is produced by performing ultrafine filtration, multistage vacuum distillation, ion exchange, reverse osmosis, and the like. Thus, various purification methods have been developed according to the purpose of use.
In recent years, with the contamination of raw water, the amount of chlorine and chlorine used in the above-mentioned processes has increased, and many people dislike these tastes and odors, and the teratogenicity of residual chlorine. Etc. is a problem. And the present purification technology only separates the pollutants, and the sludge generated by the separation is dumped in the natural world, and secondary pollution becomes a problem. Therefore, a vicious cycle of water purification → environmental pollution → water source pollution is repeated.
The present invention has been made in view of such circumstances, and since a chlorine-based chemical substance and microorganisms are not used, a lake and pond purification method that can purify lakes and ponds without secondary contamination of the environment. The purpose is to provide.
[0005]
[Means for Solving the Problems]
The method for purifying lakes and ponds according to the first aspect of the invention provides a predetermined number of holes on the outer periphery or bottom of the lakes and ponds, and negatively ionized granular or powdered Si or SiOx (0 <x ≦ 2). ) Is embedded in the glass tube in the vertical direction.
Here, negative ionization means that a negative charge is given.
In this method for purifying lakes and ponds, negative ions are released from the negative charge imparting means to the lakes and ponds, and these negative ions activate oxygen and purify lakes and ponds by the same action as ozone. It is done.
[0006]
The lake and pond purification method of the second invention is characterized in that, in the first invention, the hole has a depth of 2 to 5 m below the deepest part of the lake or pond.
In this lake and pond purification method, the lake and pond are reliably purified from the deepest part.
[0007]
In the method for purifying lakes and ponds of the third invention, in the second invention, a mixture of soil and negative ionized granular or powdered Si or SiOx (0 <x ≦ 2) is introduced into the hole. The negative charge applying means is embedded.
In this method for purifying lakes and ponds, the speed of purification can be increased.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.
FIG. 1 is an elevational view showing an ion rod 3 as a negative charge applying means applied in this embodiment. This ion rod 3 is disclosed in Japanese Patent Laid-Open No. 9-220288. A glass tube 1 having a diameter of 10 cm and a length of 1.5 m is provided with 7 kg of granular or powdery Si or SiOx (0 <x ≦ 2) 2. Is sealed and sealed. Si or SiOx2 is previously charged into a negatively ionized quartz crucible for a predetermined time, and is negatively ionized, that is, given a negative charge. In order to ionize the quartz crucible, negative ions are supplied to the quartz crucible for about 3 hours using the static electricity reducing / removal apparatus proposed in Japanese Patent Application No. 9-243228.
[0009]
The ion rod 3 is buried in the ground around the lake and pond. FIG. 2 is a plan view of a lake in this embodiment, and FIG. 3 is a side view thereof.
Three ion rod embedding holes 5 are provided at substantially equal intervals along the outer periphery of the lake 4. The ion rod embedding hole 5 is excavated to a depth of 2 to 5 m below the deepest portion of the lake 4 using a boring machine. Its diameter is approximately 20 cm. An ion rod 3 is buried at the bottom of the ion rod embedding hole 5 with the longitudinal direction thereof aligned with the vertical direction. The ion rod 3 is buried in the ion rod embedding hole 5 by introducing a mixture of negatively ionized granular or powdered Si or SiOx (0 <x ≦ 2) 50 kg and soil. As described above, Si or SiOx is negatively ionized by being charged into a negatively ionized quartz crucible for a predetermined time.
[0010]
The ionic rod 3 appropriately sets the burial location and the number of burials according to the shape of the lake and the pond 4 and the degree of contamination.
4, 5 and 6 are plan views showing positions where the ion rod embedding hole 5 is provided in another embodiment. As shown in the plan views of FIGS. 4 and 5, the ion rod embedding holes 5 are provided in a well-balanced manner along the shapes of the lakes and ponds. The number of the ion rod embedding holes 5 is increased when the degree of contamination of the lakes and ponds is large.
In the case of the aquaculture pond shown in the plan view of FIG. 6, ion rod embedding holes 5 are provided at the four corners and the center.
[0011]
Next, the results of examining the water quality of the lake over time by burying the ion rod 3 around the lake will be described. Lakes of investigating changes in the water quality, and located in Ishikawa Prefecture, an elliptical shape shown in FIG. 2, a lagoon of Nagajikuryaku 2500 m, Tanjikuryaku 500 meters, depth approximately 2m, the amount of water approximately 2.5 million m ^3. Ion rods 3 are embedded at substantially equal intervals on the outer periphery of this lagoon, and the transparency, the amount of dissolved oxygen (DO), the chemical oxygen demand (COD), the amount of nitrogen (T -N), phosphorus content (TP) and ammoniacal nitrogen content (NH ₄ -N). The results are shown in FIGS. 7 to 12, it can be seen that all items of transparency, DO, COD, TN, TP, and NH ₄ —N improved with time. If the water temperature falls below 15 ° C, the water quality survey will be affected, but during this water quality survey period, even the lowest water temperature exceeds 17.1 ° C and 15 ° C, and the influence of the water temperature need not be considered.
In addition, as a result of burying the ion rod 3, larvae of Bora, which were confirmed to exist in this lake until 1960, were seen swimming in the river entrance.
As described above, it was confirmed that the lagoon was surely purified, but this is because negative ions are released from the ion rod 3 and these negative ions activate oxygen, which is similar to the action by ozone. This is thought to be caused by In this purification method, chlorine-based chemical substances and microorganisms are not used, so that the environment is not secondarily contaminated.
[0012]
In the above-described embodiment, the case where the ion rod 3 having a diameter of 10 cm and a length of 1.5 m is used is described. However, the present invention is not limited to this. Depending on the condition, various sizes of ion rods 3 such as an ion rod 3 having a diameter of 13 cm and a length of 1.8 m or an ion rod 3 having a diameter of 21 cm and a length of 2.1 m can be used. The larger the ionic rod 3, the greater the purification of lakes and ponds.
And the embedment depth of the ion rod 3 is not limited to a depth of 2 to 5 m below the deepest part of the lake and the pond, but when buried at a depth of 2 to 5 m below the deepest part of the lake and the pond, The lake can be purified reliably from the deepest part.
Furthermore, in the above embodiment, the ion rod 3 is embedded by introducing a mixture of soil and negatively ionized Si or SiOx into the ion rod embedding hole 5, but the ion rod 3 is not limited to this. . However, when negatively ionized Si or SiOx is mixed with soil, the purification speed of lakes and ponds can be increased.
[0013]
【The invention's effect】
As described above in detail, according to the lake and pond purification method of the first invention, a predetermined number of negative charge imparting means in which negatively ionized granular or powdered Si or SiOx is enclosed in a glass tube, Since the negative charge is released from the negative charge imparting means to the lake and pond, the negative ions activate oxygen and purify the lake by the same action as ozone. I think that. According to this purification method, the environment is not secondarily contaminated because no chlorine-based chemical substances and microorganisms are used.
[0014]
According to the lake purification method of the second invention, since the negative charge imparting means is buried at a depth of 2 to 5 m below the deepest part of the lake and pond, the lake and pond are reliably purified from the deepest part.
[0015]
According to the lake purification method of the third invention, the negative charge imparting means is provided by introducing a mixture of soil and negative ionized granular or powdered Si or SiOx into the hole in which the negative charge imparting means is embedded. Since it is buried, the speed of purification can be increased.
[Brief description of the drawings]
FIG. 1 is an elevational view showing an ion rod applied in a method for purifying lakes and ponds according to the present invention.
FIG. 2 is a plan view showing positions where ion rod embedding holes are provided in one embodiment of the method for purifying lakes and ponds according to the present invention.
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a plan view showing positions where ion rod embedding holes are provided in another embodiment of the method for purifying lakes and ponds according to the present invention.
FIG. 5 is a plan view showing positions where ion rod embedding holes are provided in another embodiment of the method for purifying lakes and ponds according to the present invention.
FIG. 6 is a plan view showing positions where ion rod embedding holes are provided in another embodiment of the method for purifying lakes and ponds according to the present invention.
FIG. 7 is a graph showing the results of examining the temporal change in the transparency of a lake.
FIG. 8 is a graph showing the results of examining changes over time in the amount of dissolved oxygen in a lake.
FIG. 9 is a graph showing the results of examining changes over time in chemical oxygen demand of a lake.
FIG. 10 is a graph showing the results of examining changes over time in the nitrogen amount (TN) of a lake.
FIG. 11 is a graph showing the results of examining changes over time in the amount of phosphorus (TP) in a lake.
FIG. 12 is a graph showing the results of examining time-dependent changes in the amount of ammoniacal nitrogen (NH ₄ —N) in a lake.
[Explanation of symbols]
1 Glass tube 2 Si or SiOx
3 Ion rod 4 Lake and pond 5 Ion rod buried hole

Claims (3)

A predetermined number of holes are provided on the outer peripheral side or bottom of lakes and ponds, and negative charges are provided in the holes by encapsulating negatively ionized granular or powdered Si or SiOx (0 <x ≦ 2) in glass tubes. A method for purifying lakes and ponds, characterized in that the means is buried in the vertical direction. The method for purifying lakes and ponds according to claim 1, wherein the holes have a depth of 2 to 5 m below the deepest part of the lakes or ponds. 3. The negative charge imparting means is embedded by introducing a mixture of soil and negatively ionized granular or powdered Si or SiOx (0 <x ≦ 2) into the hole. The method for purifying lakes and ponds as described.

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