JPH064882Y2 - Floating type sewage treatment facility - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a sewage treatment facility having an elongated settling tank provided in a floating body on the sea, and particularly sloshing generated in the settling tank in the floating body due to swaying due to waves. , The floating type sewage system having a sedimentation tank which can be suppressed by the water control member provided in the sedimentation tank, and which has the same sludge sedimentation effect as in the stationary state without causing sludge sedimentation inhibition. Regarding processing equipment.

[Prior Art] With regard to the construction of a sewage treatment plant, it is difficult to obtain a site for it, and there are also problems of environmental destruction and pollution, and there is an idea to construct this sewage treatment facility in a floating body on the sea.

That is, sewage treatment equipment is installed on a floating body moored near the land, pre-treatment such as sedimentation of sewage generated at home on land, and then sent to the floating sewage treatment equipment through a pipe on the sea. It is something to process. In this floating sewage treatment facility, sewage is separated into sludge by a settling tank, an aeration tank and a disinfection basin, cleaned, and discharged into the sea. Along with this, the sludge settled in the settling tank is scraped by a scraper or the like and sent to the land as concentrated sludge to be treated by a sludge treatment facility.

[Problems to be Solved by the Invention] In the above-mentioned floating body type sewage treatment equipment, since the floating body is moored on the sea, there are the following problems. That is,
The floating body is shaken by the waves on the sea, and the settling tank integrally provided with the floating body is also shaken. The settling tank is originally allowed to stand and settles and separates sludge in wastewater. However, the settling tank provided in the floating body type sewage treatment equipment is swayed together with the floating body due to waves on the sea, and there is a problem that the effect of the settling action cannot be sufficiently obtained. In particular, according to experiments, among the vibrations that the sedimentation tank receives, vertical movement has little effect on sludge settling action, but horizontal movement and sloshing action due to locking cause sludge settling inhibition and sludge rolling up, and It has been shown to cause inhibition.

The present invention has been made to solve the problems of these settling tanks, and the purpose thereof is to suppress sloshing of the settling tanks provided on the floating body, which is caused by waves on the sea. Another object of the present invention is to provide a floating body type sewage treatment equipment having a settling tank capable of raising the precipitation effect of the same as in a stationary state.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a sewage treatment facility provided in a floating body on the sea, in which sewage is allowed to flow in one direction to precipitate sludge and to purify it downstream. A slender settling tank is formed to flow a predetermined distance along one direction, and at the inner bottom of the settling tank, sludge settling to the bottom from the upstream side to the downstream side in the flow direction of sewage is attracted. And a sludge reservoir is formed on the most downstream side of the settling tank to collect the sludge attracted by the scraper, and the lower ends of the sludge tanks are suspended above the settling tank so as to be immersed in the sewage. Along with the sewage flow direction, a water control member that extends a predetermined length and is arranged in parallel in the width direction of the settling tank at a predetermined interval is provided to suppress sloshing of the sewage caused by sea waves. .

[Operation] With the above configuration, it is possible to suppress the sloshing of the slender settling tank provided in the floating body, which is caused by waves on the sea, by the water control member, obstruct sludge settling in the settling tank, and roll up sludge in the settling tank. The phenomenon does not occur and the sludge can be efficiently precipitated.

[Embodiment] A preferred embodiment of the present invention will be described with reference to the accompanying drawings.

The floating body is provided with a settling tank for allowing the sewage to stand and to settle the sludge in the sewage. The floating body is provided with an aeration tank for aerating sewage as a sewage treatment facility, a disinfection basin and a sludge concentrating tank in addition to the settling tank. Then, this floating body is moored on the sea, and is connected to the onshore sewage tank by a sewage water supply pipe and a concentrated sludge transfer pipe.

FIGS. 1 and 2 show a first embodiment of the settling tank 2 provided in the floating body 1. The settling tank 2 is formed in a slender shape so as to flow the sewage along a predetermined distance for a predetermined distance. Sewage is made to flow from the upstream side to the downstream side of the settling tank 2 so that sludge is settled on the bottom surface of the settling tank. At the bottom of the settling tank 2, a scraper 4 for scraping the settled sludge is provided. The scratching machine 4 is provided with two endless chains 5 which are driven in the longitudinal direction of the settling tank 2, and the two ends of a plurality of scratching plates 7 are engaged with the two chains 5, respectively. There is.

As shown in the drawing, the scraper 4 drives the endless chain 5 in the direction of the arrow by the drive drum 16, and the scraper plate 7 under the scraper scrapes sludge deposited on the bottom surface of the settling tank 2 as the chain 5 is driven. And move it to the sludge reservoir 15.

The settling tank 2 is provided with a sewage water supply pipe (not shown), an overflow weir and the like for discharging the sewage, which is sludge precipitated in the sewage and separated and cleaned, to the disinfection pond.

A water control member 10 for suppressing sloshing of the waste water 3 is provided above the waste water 3 stored in the settling tank 2. To a mounting member 9 which is hung over the upper part of the settling tank 2 in the width direction at a predetermined interval in the longitudinal direction, through a supporting member 14 hanging from the mounting member 9, vertically, and
It is attached so that the lower end is immersed in sewage. The number and height of the water control members 10 provided in the settling tank 2 are appropriately selected depending on the size of the settling tank 2 and the acceleration due to the shaking of the floating body 1. In this embodiment, an example in which the two water control members 10 are provided at equal intervals has been shown.

The water control member 10 is made of a material having water resistance and durability and strength capable of suppressing the occurrence of sloshing, and is made by appropriately selecting a material such as a steel plate, wood, or plastic.

In the present invention, the floating body 1 caused by sea waves is provided by providing the settling tank 2 with the sloshing water control member 10 as described above.
When the sewage in the settling tank 2 vibrates due to the shaking, the following action is performed.

That is, since the water control member 10 is provided above the dirty water 3 of the settling tank 2, a cycle in which the natural frequency of sloshing of the settling tank 2 is increased to cause a relatively large fluctuation in the floating body. The sloshing does not occur in the settling tank 2 due to the large waves of.

In addition, since the wave on the sea having a small period corresponding to the sloshing natural frequency of the settling tank 2 is extremely small in both wavelength and wave height, the fluctuation of the floating body 1 at the sloshing natural frequency of the settling tank 2 can be almost ignored. It can be reduced to a certain degree, and sloshing in the precipitation tank 2 can be significantly suppressed.

Therefore, even if the floating body is shaken by the waves, the movement of the dirty water in the settling tank acts so as to be extremely fine. As a result, the sludge settling action in the settling tank 2 is not lowered, and the settling effect can be enhanced as if the floating type sewage treatment equipment was left stationary.

[Effects of the Invention] Since the present invention is as described above, it has the following excellent effects.

(1) By providing a sloshing water control member in a slender settling tank, it is possible to suppress the occurrence of sloshing, so that it does not cause sludge settling in the settling tank or the sludge that has settled up does not occur, and excellent sludge A precipitation effect can be obtained.

(2) Since the water control member provided in the settling tank does not require an operation to operate the water control member or maintenance of the member, manpower and cost are unnecessary.

[Brief description of drawings]

1 and 2 are explanatory views of a first embodiment according to the present invention. In the figure, 1 is a floating body, 2 is a settling tank, 3 is sewage, and 10 is a water control member.

Claims (1)

[Scope of utility model registration request] 1. A sewage treatment facility, which is provided on a floating body on the sea and in which sewage flows in one direction to precipitate sludge and cleans it in a downstream side, has a settling tank for flowing the sewage over a predetermined distance in one direction. Along with the slender formation, the inside bottom of the settling tank is provided with a scraper for scraping sludge settling to the bottom along the upstream side to the downstream side in the flow direction of the sewage, and the above-mentioned scratching unit is arranged at the most downstream side of the settling tank. It forms a sludge reservoir that collects sludge attracted to the machine, and the lower ends of the sludge tanks are suspended above the settling tank so as to be immersed in the sewage and extend a predetermined length along the flow direction of the sewage. In addition, the floating type sewage treatment facility is provided with a water control member that suppresses sloshing of sewage caused by waves on the sea in parallel at a predetermined interval in the width direction of the settling tank.