KR20120030180A - Sewage treatment plant in ship - Google Patents

Abstract

PURPOSE: A wastewater treating apparatus for vessels is provided to sterilize plenty of wastewater in a short period of time by including a reactor equipped with an advanced oxidation process(AOP) lamp. CONSTITUTION: An aerating bath(10) aerates wastewater generated from a vessel. A settling bath(20) settles sludge contained in the wastewater and transfers the settled sludge to the aerating bath. A sterilizing bath(30) stores wastewater from the settling bath and discharges sterilized water. A reactor sterilizes the wastewater from the sterilizing bath based on an AOP lamp(44) and re-transfers the treated water to the sterilizing bath. The AOP lamp generates hydroxyl groups to photo-oxidize and decompose the wastewater. The reactor is composed of a reacting bath(42) and the AOP lamp.

Description

Sewage treatment plant in ship}

The present invention relates to a marine sewage treatment apparatus, and more particularly, to a marine sewage treatment apparatus for discharging various sewage, including manure generated in the vessel after aeration, sedimentation, sterilization process.

The method of treating sewage in a ship is typically a method of storing sewage in a tank and oxidizing it, decomposing by microorganisms, and electrolysis.

Among them, a method using a microorganism is common, which will be briefly described with reference to FIG. 1. 1 is a block diagram showing a conventional sewage treatment apparatus for ships.

Conventional marine sewage treatment apparatus is largely composed of a primary aeration tank (1a), secondary aeration tank (1b), sedimentation tank (2) and sterilization tank (3).

Sewage generated in the vessel is introduced into the primary aeration tank (1a) and the first aeration (Aeration), the sewage aerated in the primary aeration tank (1a) is again introduced into the secondary aeration tank (1b) and aerated secondary.

At this time, oxygen is supplied from the blower 7 to the primary and secondary aeration tanks 1a and 1b and aerated while being mixed with sewage.

The sewage aerated in the secondary aeration tank (1b) is automatically introduced into the sedimentation tank (2) due to the rise of the water level, and in the sedimentation tank (2) is divided into the lower sludge that sinks to the bottom and the upper sludge that floats on the water surface according to the weight of the sludge .

In the settling tank 2, the upper and lower sludges are conveyed to the primary aeration tank 1a according to the set time, and the conveying process is repeated until the sludge is completely decomposed. And sewage except sludge is sent to the sterilization tank (3).

Chemical tank (4) is connected to the sterilization tank (3), the medicine (chlorine, chlorine) is introduced into the sterilization tank (3) through the dosing pump (5), and the injected chemical is mixed with sewage and sterilization is performed.

The wastewater sterilized in the sterilization tank 3 is discharged to the outside of the vessel by the discharge pump 6, and when the discharge of the wastewater is finished, the medicine is again introduced into the sterilization tank 3 by the dosing pump 5 and the settling tank ( Increase the sterilization power by continuously mixing with the sewage which flows in 2) constantly.

Such a conventional vessel sewage treatment apparatus is a chlorine sterilization method for directly administering a drug, and thus, the drug is directly administered during a sterilization process, so that the process is simple and the cost of equipment is low.

However, the method of sterilizing by direct injection of chemicals does not satisfy the limit of residual chlorine (0.5 ml / l or less) among the water quality standards of sewage treatment generated in ships prescribed by the International Maritime Organization (IMO).

In addition, residual chlorine may cause corrosion in the equipment due to residual chlorine after the sterilization of sewage, and the use of chlorine chemicals for the sterilization of the sewage incurs constant maintenance and maintenance costs.

Therefore, the chlorine sterilization method is not suitable for internationally strengthened environmental regulations, and has many problems in equipment operation such as promoting corrosion of the entire equipment and incurring continuous management and maintenance costs.

Embodiments of the present invention are to provide a marine sewage treatment apparatus that can be installed in a narrow space of the ship by providing a reaction tank including an AOP lamp, very good sterilizing power, easy to replace and easy to maintain.

According to an aspect of the invention, the aeration tank for receiving the aeration generated from the vessel aeration; A settling tank for depositing sludge contained in the sewage aerated in the aeration tank and returning the sludge to the aeration tank; A sterilization tank for storing the wastewater introduced from the settling tank and discharging the treated water; And an AOP lamp for generating a hydroxyl group (OH Radical) to mine-decompose the sewage, to sterilize the sewage flowing from the sterilization tank, and to re-introduce the treated water into the sterilization tank. A marine sewage treatment apparatus may be provided.

Here, the reaction tank may be composed of a reaction tank in which sewage flows from the lower side by a circulation pump, and an AOP lamp disposed vertically and replaceably coupled to the inside of the reaction tank.

The aeration tank is composed of a primary aeration tank and a secondary aeration tank, and each aeration tank is provided with a pipe-shaped diffuser to supply oxygen from the blower, and each diffuser can increase the aeration efficiency by miniaturizing oxygen bubbles. An aerator may be provided to make it.

In addition, the settling tank may be provided with an upper conveying pipe for conveying the sludge floating on the water surface to the aeration tank, and a lower conveying pipe for transporting the sludge sinking to the bottom to the aeration tank.

In addition, a lower floating switch is installed in the lower part of the sterilization tank to detect the level of the sterilized treated water and stop the operation of the discharge pump, and the upper part may operate the discharge pump by sensing the level of the treated water. An upper floating switch is installed, and the upper side of the upper floating switch operates the blower and the circulating pump while detecting an emergency signal by detecting the level of the treated water in order to prevent the reverse flow of the treated water due to the failure of the discharge pump. A top floating switch can be installed that stops.

Embodiments of the present invention can sterilize a large amount of sewage in a short time by using an AOP lamp, and also has a very good sterilization effect.

In addition, it can be easily installed in the space of a narrow ship and AOP lamp can be easily replaced, which is very effective in maintenance, management and cost.

1 is a block diagram showing a conventional sewage treatment apparatus for ships.
Figure 2 is a block diagram showing a marine sewage treatment apparatus according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. The following description and the accompanying drawings are presented for the overall understanding of the present invention, and thus the technical scope of the present invention is not limited thereto. And a detailed description of known configurations and functions that may unnecessarily obscure the subject matter of the present invention will be omitted.

Figure 2 is a block diagram showing a marine sewage treatment apparatus according to an embodiment of the present invention.

Referring to the present invention, the present invention may be largely composed of aeration tank 10, settling tank 20, sterilization tank 30 and the reaction tank (40).

First, the aeration tank 10 is a tank into which the sewage generated in the vessel is introduced, and aeration of the sewage by microorganisms and the like.

Aeration means the oxidation of dissolved or volatiles by contacting water or other liquids with gases such as oxygen or carbon dioxide.

And the aeration tank 10 may be provided with two of the primary aeration tank (10a), secondary aeration tank (10b), as shown in order to increase the processing efficiency, the primary aeration tank (10a) and the secondary aeration tank ( 10b) inside the tubular diffuser 12 may be installed to supply the oxygen produced by the blower 50 in the sewage.

The aeration is activated by the growth of microorganisms in the aeration tank 10 by the oxygen supplied through the diffuser 12.

In this case, an aerator 14 may be further provided at a lower end of each diffuser 12.

The aerator 14 has a structure in which oxygen bubbles can be relatively fined to allow oxygen to be dissolved in the sewage well to increase aeration efficiency, and form a three-dimensional net structure in which numerous fine holes are formed, such as a sponge. It is preferable.

That is, fine oxygen bubbles are formed through the fine pores, and thus the aeration efficiency can be greatly increased.

Next, the sedimentation tank 20 is introduced while the aerated water aerated in the aeration tank 10 overflows, and separated into sludge floating on the top and sludge sinking on the bottom after a predetermined time, and the separated sludge Transfer back to the aeration tank 10.

An upper conveying pipe 22 and a lower conveying pipe 24 may be formed in the sedimentation tank 20 to convey the precipitated sludge to the aeration tank 10, in particular, the primary aeration tank 10.

The upper conveying pipe 22 is a pipe capable of sucking the sludge floating on the water surface of the settling tank 20 and transporting it to the primary aeration tank 10a.

And the said lower conveyance pipe 24 is a pipe which can convey the sludge which sank to the bottom of the said settling tank 20 to the said primary aeration tank 10a.

At this time, the upper conveying pipe 22 and the lower conveying pipe 24 may be connected to the blower 50 may have a suction force. In more detail, the conveyance is performed according to Bernoulli's principle that the sludge is sucked while the pressure decreases due to the flow rate of oxygen supplied from the blower 50.

This conveying process is repeated until the sludge is completely decomposed.

Next, the sterilization tank 30 is stored in the sedimentation tank 20, the water level rises automatically, and temporarily stores the introduced sewage and sends it to the reaction tank 40 to be described later. To be discharged.

The sterilization tank 30 may be provided with a circulation pump 32 for circulating sewage, and a discharge pump 34 for discharging may be provided.

The lower floating switch 36a, the upper floating switch 36b, and the uppermost floating switch 36c corresponding to sensors for detecting a water level in the lower, upper and uppermost portions may be installed in the sterilization tank 30, respectively. have.

The lower floating switch 36a is installed at the bottom of the sterilization tank 30, and the treated water sterilized in the reaction tank 40 is discharged to the outside by the operation of the discharge pump 34 to maximize the water level. When it is lowered, the operation of the discharge pump 34 is stopped.

In addition, the upper floating switch 36b is installed at an upper or relatively high position of the sterilization tank 30. When the treated water sterilized in the reaction tank 40 is introduced, the water level is sensed and discharged. The pump 34 is operated again to induce discharge of treated water.

In addition, the uppermost floating switch 36c is installed above the upper floating switch 36b, that is, the top of the sterilization tank 30, and the water level of the treated water due to the failure of the discharge pump 34. Is continuously raised to prevent the treated water from flowing back into the settling tank 20 or the blower 50.

That is, when the water level of the treated water is gradually increased and the top floating switch 36c detects an emergency signal to the manager, the blower 50 and the circulation pump 32 and other equipments are stopped to operate. To control.

Since each of the above-mentioned floating switches is a known sensor detected by buoyancy generated according to the water level, detailed description of the principle and structure will be omitted.

Next, the reaction tank 40 is a tank for sterilizing the sewage introduced by the circulation pump 32 in the sterilization tank 30 by the AOP lamp 44 and re-introducing the sterilization tank 30 again.

The reaction tank 40 is composed of a reaction tank 42 in which wastewater is introduced by the circulation pump 32 and sterilization is performed therein, and an AOP lamp 44 installed vertically in the reaction tank 42. Can be.

At this time, the Advanced Oxidation Process (AOP) lamp 44 emits ultraviolet rays by using an insoluble electrode to generate a hydroxyl group (OH Radical) having a high oxidizing power to decompose the decomposition material by photooxidation.

The AOP lamp 44 has the advantage that the reaction rate is very fast and has a much stronger oxidizing power than conventional chemicals.

In other words, the sterilizing power is about 100 times better than chemicals, and it can completely remove bacteria at a speed of 3000 times faster than chlorine. The space required for the device can be greatly reduced.

The AOP lamp 44 may be installed vertically in the reaction tank 42, but is not limited thereto. It is preferable that the AOP lamp 44 is attached and detachable to be easily replaced.

On the other hand, the sewage flowing into the reaction tank 42 is preferably connected to the pipe from the circulation pump 32 to be introduced from the lower side of the reaction tank (42). This is a structure capable of maximizing the efficiency of the sterilization treatment by generating a vortex that rises while the sewage spirals when the sewage is introduced from the lower portion of the reaction tank 42.

That is, the sterilization treatment by the AOP lamp 44 is smoothly performed by allowing the sewage to mix well without stagnation.

It is preferable that the material of the reaction tank 42 be SUS resistant to corrosion. This is to prevent corrosion by hydroxyl groups.

The following provides a test result of treatment of sewage using the present invention.

This test shows the number of E. coli detected in raw sewage, Treated water 1, and Treated water 2. It is also the result of five tests.

Test date
Total coliform (cells / 100 ml)

Raw sewage

Treated water 1
Treated water 2
1 (2010.05.28)
200

2
3
2 (2010.05.30)
550

30
36
3 (2010.06.01)
250

One
10
4 (2010.06.03)
350

4
0
5 (2010.06.05)
150

2
One

As shown in Table 1, the treated water treated by the present invention appears to have a very good or very few bactericidal effects because E. coli appears to be extremely few or almost absent.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. And changes may be made without departing from the spirit and scope of the invention.

10: aeration tank 10a: primary aeration tank
10b: secondary aeration tank 12: diffuser
14: Aerator
20: sedimentation tank 22: upper conveying pipe
24: lower conveying pipe
30: sterilization tank 32: circulation pump
34: discharge pump 36a: lower floating switch
36b: top floating switch 36c: top floating switch
40: reaction tank 42: reaction tank
44: AOP lamp
50: blower

Claims (5)

An aeration tank 10 which receives a waste water generated from the vessel and aerations;
A settling tank 20 for depositing sludge contained in the sewage aerated in the aeration tank 10 and returning the sludge to the aeration tank 10;
A sterilization tank 30 for storing the wastewater introduced from the settling tank 20 and discharging the sterilized treated water; And
An AOP lamp 44 is installed therein to generate a hydroxyl group (OH Radical) to disintegrate the sewage, and sterilize the sewage flowing from the sterilization tank 30, and treat the treated water to the sterilization tank 30. Re-supply reactor (40); Marine sewage treatment apparatus comprising a. The method of claim 1,
The reaction tank 40 is composed of a reaction tank 42 into which wastewater flows from the lower side by the circulation pump 32, and an AOP lamp 44 vertically disposed in the reaction tank 42 and replaceably coupled thereto. Marine sewage treatment apparatus, characterized in that it can be. The method of claim 2,
The aeration tank 10 is composed of a primary aeration tank 10 and a secondary aeration tank 10, each aeration tank is provided with a tubular diffuser 12 to supply oxygen from the blower 50, each The diffuser 12 is a marine sewage treatment apparatus, characterized in that the aerator 14 is provided to increase the aeration efficiency by miniaturizing oxygen bubbles. The method of claim 3, wherein
The settling tank 20 is provided with an upper conveying pipe 22 for conveying sludge floating on the water surface to the aeration tank 10 and a lower conveying pipe 24 for conveying sludge that sinks to the bottom to the aeration tank 10. Marine sewage treatment apparatus, characterized in that. The method of claim 3, wherein
The lower floating switch 36a is installed at the lower part of the sterilization tank 30 to detect the sterilized treated water level and stop the operation of the discharge pump 34.
In the upper portion is installed an upper floating switch 36b that can operate the discharge pump 34 by sensing the level of the treated water,
An upper side of the upper floating switch 36b detects the water level of the treated water in order to prevent a backflow of the treated water due to the failure of the discharge pump 34, and notifies the emergency signal of the blower 50 and the circulation pump ( 32, the top floating switch (36c) for stopping the operation of the marine sewage treatment apparatus, characterized in that is installed.

Images