JPH0398688A - Water treatment method - Google Patents

Abstract

PURPOSE:To remove water-bloom and invisible water-soluble organic matters as well and to enable decomposition of ammonia and removal of malodor by stirring and mixing water treatment liquid containing a large amount of natural mineral ions and gases to diffuse them into water to be treated. CONSTITUTION:Muddy sediments 22 are deposited at the bottom of ponds, lakes and marshes 21. An agitation-mixing device 24 is provided in the water to be treated 23 in the pond. An injection pipe 27 from a water treatment liquid tank 26 and air pipe 29 having an air port 28 above the surface of water are connected to the device 24. Further, on the side of the pond, a catch basin 30 is provided. When the agitation-mixing device is operated, the water treatment liquid is mixed into the water to be treated together with fine air bubbles and diffuses thereinto. The water treatment liquid contains a large amount of natural mineral ions and hence it acts not only on ordinary sludges but also on invisible suspended organic matters to form flocs 31. As the flocs rise, impurities such as water-bloom, etc., near the surface of water are taken into the flocs.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a water treatment method, particularly for ponds, lakes, rivers. Concerning water treatment methods for purifying and revitalizing breeding tanks, etc. BACKGROUND OF THE INVENTION FIG. 3 shows a conventional arrangement 52 for carrying out this type of water treatment. Here, 1 is a pond/swamp, and the water to be treated 2 from this pond/swamp 1 is first subjected to a screen 3 to remove large floating objects, and then sent to a primary sinking tank 4. The water to be treated 2 from which the contaminants 2i have been removed in the primary sedimentation side 4 is transferred to the rapid stirring tank 5
and a slow stirring tank 6. Then, the flocculant is supplied to the rapid stirring tank 5 from the injection equipment 8, and the polymer flocculant is supplied to the slow stirring tank 6 from the injection equipment 9. causes aggregation. The aggregates settle in the 'a collection and sedimentation tank 10, and the treated water 11 from which BOD and SS have been removed is temporarily stored in the treated water i412. The treated water 11 from the treated water tank 12 is appropriately circulated to the pond/swamp 1 as circulating water.

Problems to be Solved by the Invention However, with these conventional methods, (1) it is not possible to remove blue-green algae and invisible water-soluble organic matter, and (11) it is not possible to decompose ammonia bodies that are harmful to the biological environment and eliminate off-flavors. , since the water near the surface of OiD Pond/Swamp 1 is mainly treated, there are problems such as the inability to remove the sludge accumulated at the bottom of the pond. For this reason, it is difficult to improve water quality including transparency, and there is also the problem that the sludge that has settled in the settling tanks 4 and 10 must be treated. Furthermore, since it requires large-scale equipment as shown in Figure 3, there is the problem that both initial cost and maintenance cost are enormous. Therefore, the purpose of the present invention is to propose a water treatment method that can solve these problems. Means for Solving the Problems In order to achieve the above [1], the present invention stirs and mixes a water treatment liquid containing a large amount of natural mineral ions and a gas into the water to be treated to float flocs. This is to remove the flocs from the water to be treated. Further, the present invention dehydrates the flocs taken out from the water to be treated by centrifugation M#R. In this way, the water treatment solution containing a large amount of natural mineral ions acts on invisible and floating organic matter in the water to be treated, coagulates it, forms flocs, and floats the flocs. At this time, impurities such as blue-green algae are incorporated into the floc. A stirring and mixing device is usually used to stir and mix the water treatment liquid and gas into the water to be treated. This method generates fine bubbles and stirs and mixes the fine bubbles and the water treatment liquid. When a water treatment liquid is sprayed into the water to be treated together with a gas using such a stirring and mixing device, compounds such as ammonia are decomposed due to the interaction between the water treatment liquid and the stirring and mixing device. In other words, when the bubbles generated by the stirring mixer burst in the water being treated, ultrasonic waves are generated, and the energy of this ultrasonic wave loosens the interatomic bonds between nitrogen and hydrogen that make up the ammonia body. In addition, natural mineral ions contained in water treatment solutions contain large amounts of various metal cations and tend to easily decompose ammonia bodies.
It is activated by the ultrasonic waves and its tendency becomes noticeable.

As a result, compounds such as ammonia, which were difficult to decompose in the past, can be decomposed extremely easily, and organic odors can be eliminated. In addition, air bubbles promote the floating of flocs and the proliferation of bacteria. Water place! '! Since JJ liquid contains a large amount of natural mineral ions, when it is diffused into the water to be treated, it mineralizes the water quality, thereby activating the water itself. It is also harmless to living things such as fish. Since the water treatment liquid is stirred and mixed into the water to be treated together with air bubbles and spreads, it also acts on the sludge layer deposited at the bottom of the pond, causing it to be decomposed and brought to the surface.

The floated flocs are taken out of the water to be treated, but if they are dehydrated and then passed through the dehydrated solution, the resulting solution becomes extremely clean. At this time, as mentioned above, impurities such as blue-green algae are trapped in the flocs, so if the flocs are dehydrated using a centrifugal dehydrator and pulverized, the load on the door filter can be reduced. Significantly reduced. According to the present invention, a water treatment liquid is transferred to a pond using a stirring and mixing device.
It becomes possible to purify and activate the water to be treated by simply dispersing it directly into the water to be treated, such as a swamp, and removing the floated flocs from the water, dehydrating them, and draining them. Therefore, the initial cost and running cost are significantly reduced compared to the conventional method, which requires various types of sedimentation tanks and collection tanks, and in which the entire amount of water to be treated is passed through these sedimentation tanks and flocculation tanks. FIG. 1 shows a pond and
The schematic configuration of the lake purification system is shown. Here 21 is a pond.
It is a lake, and sludge 22 is deposited at its bottom.

A stirring and mixing device 24 is provided inside the water to be treated 23 in the pond/lake 21 .

This stirring and mixing device 24 includes a walkway 25 formed on the ground.
Injection pipe 27 from filtrate treatment liquid W426 when opened.
and an air pipe 29 having air 028 above the water surface. In addition, when measuring ponds and lakes 21, catchment basin 3
0 is set. In such an oval configuration, when the stirring/mixing device 24 is operated, the water treatment liquid is mixed into the water to be treated 23 together with fine bubbles and is diffused. The water treatment liquid contains a large amount of natural mineral ions, and for example, those containing the following precepts are used. This kind of water treatment liquid is produced by ■APG Inc., for example! ! llll! It is left behind. Water treatment with such composition I! J liquid is not only normal sludge but also invisible. It also acts on floating organic matter to form flocs 31. This floc 31 floats near the water surface, but at this time, impurities such as blue-green algae are taken into the floc 31. Furthermore, compounds such as ammonia are decomposed due to the interaction between the water treatment liquid and the stirring/mixing device 24.

In addition, the air bubbles promote floating of the flocs 31 and the proliferation of bacteria. The water treatment liquid is
Since it contains a large amount of natural mineral ions, it mineralizes the quality of the water being treated and activates the water itself.
Moreover, since it is harmful to living things such as fish, the purification work of the pond/lake 21 can be carried out while these living things remain present.

The water treatment liquid is dispersed by the stirring and mixing device 24 together with air bubbles in the form of a water stream 32, so that it reaches the bottom of the pond or lake.
It also acts on the accumulated sludge 22, breaking it up and making it float. After confirming that the flocs 31 have floated, push down the gate of the water collection basin 30 to a predetermined position, open the circulation/engine water injection valve 33, and pour purified water from the secondary treatment tank 34 through the rapid filter 35 into the pond. The water is sent to the lake 21 to raise its water level, and the flow of water causes the flocs 31 to flow into the catchment basin 30. This water collection basin 3
The wastewater containing flocs 31 at
Store in. Primary treatment! ! When the sewage in 436 reaches a certain amount,
Operate the centrifuge 37 while removing large floating objects.
Then, the water content of the floc 31 is removed by this centrifugal separator 37, and this water content is sent to the secondary treatment tank 34, and is then re-discharged into the pond/lake 21 through the rapid water treatment 1a35 as described above. By removing water in this manner, a powdery solid substance of floc is obtained in the centrifugation llll37, and this is discharged from the system. As described above, according to the present invention, it is possible to incorporate dirt such as blue-green algae that cannot be removed by conventional methods into the floc 31, so that the moisture collected from the centrifugal part 7 is extremely small. High cleanliness. Therefore, according to the present invention, the load on the secondary treatment tank 34 and the rapid overflow 1i 135 becomes extremely small. Therefore, in some cases, the centrifugal fraction [I
By simply subjecting the water from the l37 to the primary treatment 38, it can be immediately circulated to the pond/lake 21. As described above, according to the present invention, the water quality of the pond/lake 21 can be significantly improved without using large-scale equipment like the conventional example shown in FIG.

The table below shows before and after water treatment according to the method of the present invention. FIG. 2 does not show a schematic diagram of the animal breeding tank purification system for applying the pond embodiment of the method of the present invention.

In aquariums for viewing animals, it is necessary to remove floating ``i!1 excreta, organic matter, ``R fine cilia, etc.''.

For this reason, systems that circulate the water in the tank have traditionally been adopted, including rapid filtration, or physicochemical filtration, and slow filtration, or gravity filtration, which is a biochemical treatment method that relies on the decomposition of organic matter by nitrifying bacteria. Sea lions, sea otters, and sea otters in particular.
In ffillTI aquariums for animals such as seals, hair catchers, flocculation equipment, and rapid filtration machines are used because the water contains animal hair. However, in these conventional methods, invisible water-soluble R substances are removed.
It cannot capture ammonia or the minute cilia of animals, causing the water in the tank to become cloudy or yellow, making it impossible to improve the quality of the circulating water. Conventionally, the bleaching, sterilizing, and deodorizing effects of ozone and chlorine have been added. However,
This work requires great care and skill, and if the amount of ozone or chlorine used is small, the effectiveness will be greatly reduced, while if too much ozone or chlorine is used, it will have a negative impact on the organisms kept. Conventional systems also have the problem of having to dispose of the sludge remaining in the coagulation and sedimentation tank. The animal husbandry purification system shown in Figure 2 completely eliminates all of the problems in the conventional technology. This will be explained in detail below.

In the figure, reference numeral 41 denotes an aquarium for rearing animals, and a stirring/mixing device 24 similar to that shown in FIG. This stirring and mixing device 24
A water treatment liquid tank 26 and an aero 28 are connected to the . In such a device, when the stirring/mixing device 24 is operated, flocs 31 are formed as in the case of FIG.
At this time, invisible water-soluble organic matter such as excrement and leftover food is captured and formed into flocs, and cilia are incorporated into the flocs. The flocs 31 formed and floated in this manner pass through the overflow tank 43 and pass through the water tank 4.
It reaches the centrifugal fraction Ma37 together with the waste from the bottom of 1. Then, in the centrifugation step Mal37, water is removed and powdered solids of flocs are obtained. Centrifuge 37
After passing through the sand filter R44, the water from the
It is circulated to Inside the rearing water tank 41, ammonia is decomposed in the same way as in the case of FIG. In FIG. 2, reference numeral 45 denotes a similar oval breeding tank in which animals of a different species from the breeding tank 41 are kept. Effects of the Invention As described above, according to the present invention, blue-green algae and invisible water-soluble organic matter can also be removed by stirring and mixing a water treatment liquid containing a large amount of natural mineral ions and gas and diffusing it into the water to be treated. In addition to being able to decompose ammonia,
Moreover, it has the remarkable effect of making it possible to remove foreign odors. The water treatment solution can also be used to decompose and float sludge that has accumulated at the bottom of a pond or tank. Furthermore, effective water treatment can be performed with a minimum amount of equipment, and both initial costs and running costs can be reduced compared to conventional systems that require settling tanks and flocculation tanks. Furthermore, according to the present invention, it is possible to floc algae and invisible water-soluble organic matter, and it is also possible to decompose ammonia, so if this floc is dehydrated by centrifugal MIl, the water removed from the floc is It becomes extremely clean. Therefore, the load on subsequent filters and the like can be significantly reduced compared to conventional methods.

[Brief explanation of drawings]

FIG. 1 shows an overview of a pond/lake purification system to which an embodiment of the method of the present invention is applied. FIG. 2 is a schematic diagram of an animal breeding tank purification system to which another embodiment of the method of the present invention is applied, and FIG. 3 is a schematic diagram of a conventional water treatment facility. 21... Pond/lake, 24... Stirring mixer, 26...
...Water treatment liquid tank, 37...Centrifuge M machine.

Claims (1)

[Claims] 1. Stirring and mixing a water treatment liquid containing a large amount of natural mineral ions and gas into the water to be treated to float flocs, and take out the floated flocs out of the water to be treated. Characteristic water treatment method. 2. The water treatment method according to claim 1, wherein the flocs taken out from the water to be treated are dehydrated using a centrifuge.