JPH0885000A - Portable aerator - Google Patents

Abstract

PURPOSE: To provide a method in which such artificial pollution as domestic waste water is dispersedly improved and circulation of an original natural purification function is recovered by constituting a portable aerator, so that absorption of highly dissolved oxygen is obtained and the portable aerator is formed into a portable floating type and easily installed in a place near to the generation source of polluted water in a method for simulating the natural aeration function of a river for polluted water with deficiently dissolved oxygen. CONSTITUTION: An aerator is constituted of a submersible pump 1a and an aspirator 1b, and a meshlike vessel 2a is floated on the water surface by a float 2b. Absorption of dissolved oxygen necessary for purification is caused by injecting water from the upper part of the water surface.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to easily purify polluted water such as scattered lakes, artificial ponds, etc., which have lost their purifying function due to lack of dissolved oxygen, at that location and a location closer to the source. Become.

[0002]

2. Description of the Related Art In conventional purification methods, activated sludge in sewage treatment equipment is used. The above method has the following drawbacks. (1) It cannot be installed easily and in a short period of time because enormous costs are required for planning, investigation, design, construction, and maintenance. (2) Although it is a treatment by microorganisms, it is a high-density aggregate type, and it is difficult to stably treat the sewage collected for a short period of time consistently with variations in the degree and amount of dirt.

[0003]

In view of the above, the present invention can be carried out easily and economically in a place close to a dispersed source, in a state of a low degree of fouling, in a time required for microbial treatment. The purpose is to provide a method.

[0004]

As shown in FIG. 1, the means for solving the problems according to the present invention is (1) of a portable float type so as to be able to deal with dispersed sites. (2) Submersible pump 1a
By using the and the air intake device 1b together, a high dissolved oxygen absorption can be obtained by injecting polluted water into which air is mixed into the water surface.

[0005]

In the above means for solving the problems, it becomes possible to easily purify lakes and marshes, artificial ponds, etc., whose purifying function has been remarkably deteriorated due to lack of dissolved oxygen, at that place and at a dispersing place closer to the source.

[0006]

The structure of the present invention will be described below with reference to the drawings.
FIG. 1 shows a block diagram of a portable aeration apparatus of the present invention. It is composed of a submersible pump 1a and an air intake device 1b, and has a structure in which a mesh container 2a is fixed to a float 2b floating on the water surface.

In FIG. 1, the submersible pump 1a is housed in the mesh container 2a to prevent inhalation of stray matter from the suction port, and the float type is used to keep the distance between the water surface and the jet port 1c constant. It is also a consideration that the dissolution efficiency is not affected by the water level and that the load on the submersible pump 1a is reduced to reduce the loss. Air in the atmosphere is mixed with polluted water sucked by the submersible pump 1a by the air intake device 1b, and the injection port 1c
Spray more water.

The principle of the present invention is to supply dissolved water with dissolved oxygen necessary for natural purification. By simulating the aeration mechanism of the river flow as the method, it became possible to supply oxygen in the atmosphere in a planar, dispersive, efficient and economical manner. This is because, in order to purify most efficiently by the action of microorganisms, it is necessary to disperse low-density ones regardless of time, instead of high-density batch treatment.

As a method of use, it is more effective to install it in a place as close as possible to the source of contamination, and arrange the required number on the water surface according to the target water quality and water quantity. Even in the existing sewage treatment plant, if the treatment capacity is exceeded, installing it on the inlet side will reduce the purification load,
If it is installed on the outlet side, further purification effect can be obtained.

FIG. 2 shows a microbial habitat in addition to the basic type shown in FIG. 1 to improve the purification function. The habitat layer 3a has a specific gravity of 1 or more, the habitat layer 3b having a specific gravity of about 1 and the habitat layer 3c having a specific gravity of 1 or less. It consists of three layers of substances that do not affect the water quality of. Purification is performed by using a part of the polluted water absorbed by the dissolved oxygen generated by the aeration device of FIG. 1, and has the following functions.・ Attach the fine bubbles generated in the polluted water by jetting, prolong the retention time and assist oxygen dissolution.・ Providing an environment suitable for microorganisms with a wide variety of pore sizes and gentle flow rates.・ Mesh-shaped container 2a in which three-dimensional three-layered structure made of substances having different specific gravities, a layer having a specific gravity of 1 or less and a layer having a specific gravity of about 1 itself has fluidity, and a layer having a specific gravity of 1 or more floats on the water surface. Since it is inside, it is relatively fluid and prevents functional deterioration due to clogging.

In the above, the experimental results show that the intake device 1b
When the device was not attached, an effective increase in the dissolved oxygen concentration could not be obtained, so the effect of the inhaler 1b could be confirmed. The air intake device 1b is a device that takes in air in the atmosphere by utilizing the phenomenon that when an orifice is inserted in the pipe, a pressure drop portion is generated on the downstream side. The simulation of the aeration mechanism of the river flow is that the largest dissolved oxygen absorption in the natural river flow is the falling part, and the mechanism of dissolved oxygen absorption per horizontal unit area of the falling part is analyzed,
That it was simulated. It can interpret the change caused by the fall of water as follows. The potential energy + kinetic energy changes to increase in flow velocity + increase in dissolved oxygen concentration. Further, it is considered that the following is a major contributor to the absorption of dissolved oxygen.・ At the falling part, carry bubbles to the deep part and the contact time by it. -The amount of fine bubbles generated when falling and the stray time in water.・ The state of contact between water and air due to the turbulence of the surface water flow immediately after falling. Although the result varies depending on the injection height and the injection pressure and the obstacles in the water, when the air intake device 1b is used, the injection angle is generally below the horizontal and about 30 degrees is effective for increasing the dissolved oxygen concentration. I was able to contribute well. If all the energy is used to sink the bubbles to a deep portion (injection angle 90 degrees), the depth cannot be secured due to the resistance of water, and the method of absorbing dissolved oxygen is inefficient. Further, when the kinetic energy is used horizontally (injection angle 0 degree), only the falling position is changed and it does not contribute much to the absorption of dissolved oxygen.

[0012]

According to the present invention, it is possible to easily supply oxygen to polluted water in a dissolved oxygen-deficient state at a place closer to the source. As a result, it is the most efficient and economical because it promotes the inhabitation of aquatic organisms in its place and in the downstream and further natural purification is carried out.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of a portable aeration device according to the present invention.

FIG. 2 is an example in which the present invention is equipped with a microbial habitat.

[Explanation of symbols]

 1a Submersible pump 1b Inhaler 1c Injection port 2a Mesh container 2b Float

Claims (1)

[Claims] 1. A submersible pump 1a and an air intake device 1b are floated on the water surface, and water mixed with air generated thereby is injected to the water surface to absorb dissolved oxygen in the water and purify by small-scale dispersion. A portable aerator characterized by performing.