JP2002028674A - Water cleaning treatment equipment utilizing ozone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower ozone concentration in treated water. SOLUTION: This equipment is provided with an ozone reaction tower 7 for blowing ozone bubbles into water to be treated, and an aeration tower 8 arranged on the downstream side of the ozone reaction tower 7 and also blowing air bubbles into water to be treated passed through the ozone reaction tower 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for draining washed seawater used in, for example, a fishery distribution and handling market,
The present invention relates to a water purification system used for purifying breeding water for breeding sea animals and seafood in aquariums, fish farms, and the like using ozone.

[0002]

2. Description of the Related Art In purifying the breeding water, it is necessary to perform a sterilization treatment for the purpose of preventing the growth of bacteria, in addition to a treatment for removing excrement and remaining food of the breeding organism.

Conventionally, a method has been known in which sterilization, bleaching, and deodorization are simultaneously performed by blowing ozone bubbles into breeding water contained in an ozone reaction tower.

[0004]

However, the conventional method using ozone has a problem that the concentration of ozone remaining in the breeding water is high and is not suitable for breeding marine animals and seafood.

[0005] An object of the present invention is to solve the above-mentioned problems and to provide an ozone water purification treatment facility capable of lowering the ozone concentration in treated water.

[0006]

Means for Solving the Problems and Effects of the Invention An ozone water purification system according to the present invention comprises an ozone reaction tower for blowing ozone bubbles into the water to be treated, and an ozone reaction tower disposed downstream of the ozone reaction tower. And an aeration tower for blowing air bubbles into the water to be processed.

According to the ozone water purification treatment equipment of the present invention, the water to be treated, which has been sterilized by blowing ozone bubbles into the ozone reaction tower, is sent to the aeration tower, and the air to be treated in the aeration tower contains air. By blowing air bubbles, residual ozone in the water to be treated can be removed. Therefore, the concentration of residual ozone in the obtained treated water can be reduced, and the concentration of dissolved oxygen in the treated water can be increased. As a result, the breeding water described above is suitable for breeding creatures such as sea animals and seafood.

[0008] In the ozone water purification treatment equipment of the present invention, it is preferable that a scum separation device is provided at the top of the ozone reaction tower.

In this case, the pollutants in the water to be treated adhere to the ozone bubbles and rise in the ozone reaction tower and are separated by the scum separator, so that the pollutants in the treated water are removed. Water transparency is improved.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of an ozone water purification system according to the present invention.

As shown in FIG. 1, the ozone-based water purification system performs purification treatment on breeding water discharged from an aquarium (1) by overflow and breeding water discharged from a drain port on the bottom wall of the aquarium (1). After applying, return to the water tank (1) circulation circuit (2)
It has. The breeding water that has circulated in the circulation path (2) is returned to the water tank (1) directly from the middle of the height or from the lower end through the biofilter (3).
The biofilter (3) decomposes organic matter and ammonia which have not been decomposed in the filtration tower (5) described later. Supplemental water is appropriately introduced into the water tank (1).

A pump (4) for circulating breeding water and a filtration tower (5) located downstream of the pump (4) are provided in the middle of the circulation path (2). The filtration tower (5) contains a filter medium made of sand, gravel, etc. to which aerobic microorganisms are attached, and as the breeding water passes through the filtration tower (5), organic matter and ammonia content in the breeding water are reduced. In addition to being decomposed, decomposed products and suspended matters such as remaining bait are filtered off. In the filtration tower (5), backwash water is introduced from the bottom to wash the filter medium, and the backwash wastewater is discharged from the top.

A first bypass (6) is provided in a portion of the circuit (2) downstream of the filtration tower (5).
(6), an ozone reaction tower (7) for blowing ozone bubbles into the water to be treated, and an air bubble in the water to be treated located downstream of the ozone reaction tower (7) and passing through the ozone reaction tower (7). An aeration tower (8) for blowing is provided.

[0015] The inside of the ozone reaction tower (7) is a vertical partition wall.
(9) is divided into a downward flow chamber (10) and an upward flow chamber (11), and both chambers (10) and (11) are communicated with each other at the lower end. The breeding water that has passed through the bypass (1) flows into the downward flow chamber (10) from its upper end, flows downward through this chamber (10), and further flows upward.
(11) It flows upward inside and is discharged from the upper end. A diffuser (12) is provided at the lower end of the downward flow chamber (10) of the ozone reaction tower (7).
An ozone generator (13) arranged outside the tower (7) is connected to (12), and the ozone sent from the ozone generator (13) is fed into the rearing water flowing downward in the downward flow chamber (10). Are blown in a bubble state through the air diffuser (12).

The breeding water flows into the aeration tower (8) from the upper end, flows downward in the tower (8), and is discharged from the lower end. A diffuser (14) at the lower end inside the aeration tower (8)
And a blower (not shown) arranged outside the tower (8) is connected to the air diffuser (14).
The air sent from the blower is blown into the breeding water flowing downward in a bubble state through the air diffuser (14). Then, residual ozone in the breeding water is removed by the air bubbles blown into the breeding water.

A second bypass (15) is provided downstream of the first bypass (6) in the circulation path (2).
5) is provided with a heat exchanger (16). The heat exchanger (16)
The breeding water after the treatment is adjusted to a temperature suitable for breeding organisms in the aquarium (1).

The circulation path (2) is provided with a valve (17) at a required position in order to control the flow of the breeding water.

Purification treatment of breeding water using the ozone water purification treatment facility having the above-described configuration is performed as follows.

The breeding water discharged from the water tank (1) is first sent to a filtration tower (5), where organic matter and ammonia in the breeding water are decomposed and suspended substances such as decomposed products and residual food are removed. Things are filtered off. Then, it flows into the upper end of the downward flow chamber (10) of the ozone reaction tower (7), and while flowing downward in the downward flow chamber (10), ozone bubbles are blown from the air diffuser (12), whereby The breeding water reacts with ozone, and the breeding water is subjected to a sterilization treatment, a bleaching treatment, a deodorization treatment, and the like. Then, the breeding water flows upward in the upward flow chamber (11), is discharged from its upper end, and flows into the upper end in the aeration tower (8).

While the breeding water flows downward in the aeration tower (8), air bubbles blown through the air diffuser (14) cause
The residual ozone in the breeding water is removed, and the dissolved oxygen concentration in the breeding water increases.

Then, the breeding water is supplied to a heat exchanger if necessary.
After the temperature is adjusted by (16), it is returned to the water tank (1). Then, when passing through the biofilter (3), the organic matter and ammonia remaining in the breeding water are finally decomposed and the decomposed product is filtered off to obtain water quality suitable for the breeding organism.

The ozone reaction tower (7) has a downward flow chamber (1).
0) and the top of the upward flow chamber (11), the top of the aeration tower (8),
In addition, ozone is discharged from a portion of the first bypass (6) downstream of the aeration tower (8).

FIG. 2 shows a second embodiment of the ozone water purification system according to the present invention. In FIG. 2, FIG.
Are denoted by the same reference numerals, and redundant description will be omitted.

In this embodiment, the inside of the ozone reaction tower (20) is not divided into a downward flow chamber (10) and an upward flow chamber (11), and the lower end thereof is connected to an ozone generator (13). A connected diffuser tube (12) is provided. The breeding water is sent into the ozone reaction tower (20) at a portion slightly above the air diffuser (12).

At the top of the ozone reaction tower (20), a scum separator (21) is provided. Scum separation device (21)
Separates the pollutants attached to the ozone bubbles blown through the air diffuser (12) and rising in the ozone reaction tower (20) together with the bubbles from the breeding water. The separated pollutants are sent to a scum tank. The breeding water that has passed through the scum separation device (21) is sent into the inside of the aeration tower (8) from the top.
Ozone is also discharged from the top of the scum separation device (21).

In the case of this embodiment, the pollutants in the water to be treated adhere to the ozone bubbles and rise in the ozone reaction tower (20) and are separated by the scum separator (21). Material is removed, resulting in increased clarity of the treated water.

[Brief description of the drawings]

FIG. 1 is a first diagram of an ozone water purification treatment system according to the present invention.
It is a schematic structure figure showing an embodiment.

FIG. 2 is a second view of an ozone water purification system according to the present invention.
It is a schematic structure figure showing an embodiment.

[Explanation of symbols]

 (7) (20): Ozone reaction tower (8): Aeration tower (21): Scum separation device

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Claims (2)

[Claims] 1. A water purification system comprising: an ozone reaction tower that blows ozone bubbles into water to be treated; and an aeration tower disposed downstream of the ozone reaction tower and blows air bubbles into the water to be treated that has passed through the ozone reaction tower. Processing equipment. 2. The water purification equipment according to claim 1, wherein a scum separation device is provided at the top of the ozone reaction tower.