JP2695062B2 - Water treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment facility for taking raw water from a river or the like and purifying it into sanitary water.

[0002]

2. Description of the Related Art A conventional water treatment facility is, for example, as shown in FIG. In FIG. 4, raw water pumped up from the intake 1 is supplied to the landing well 3 through the dust remover 2, and sodium hypochlorite or the like is supplied to the landing well 3 from the sodium hypochlorite storage tank 4 or the like. In addition, caustic soda storage tank 6 is applied to the raw water sent from landing well 3 to mixing pond 5.
Also, the alkaline agent and the coagulant / coagulant aid supplied from the coagulant storage tank 7 are mixed.

Then, the raw water mixed with the alkaline agent, the coagulant and the coagulant in the mixing pond 5 is sent to the floc formation pond 8 and the particles of the suspended solids in the raw water, which are hard to settle by gravity, are flocculated. Is formed. Further, the raw water containing flocs is sent to the chemical settling tank 9 to remove the flocs by sedimentation, and the supernatant water is sent to the rapid filtration tank 11. Further, in the case of direct coagulation filtration, after the alkaline agent and the coagulant / coagulant aid supplied from the caustic soda storage tank 6 and the coagulant storage tank 7 are mixed in the mixing pond 5, micro floc formation is immediately performed. It is sent to the rapid filtration pond 11.

Then, the water sent from the micro floc pond 10 to the rapid filtration pond 11 has suspended substances captured by the filtering action of the filter medium, and the treated water that has passed through the filter medium is supplied from the sodium hypochlorite storage tank 4. After being added with sodium hypochlorite for disinfection, it is sent to the water purification pond 12. If necessary, the treated water is sent to an advanced treatment facility consisting of an ozone contact tank 13 and an activated carbon filter basin 14 to remove trace organic substances, organic chlorine compounds, ammoniacal nitrogen, odorous components and the like.

Then, the suspended matter removed in the rapid filtration pond 11 is washed out by the backwash water, and the backwash water containing the suspended matter is drained.
It is returned to the landing well 3 via 15. The sludge settled in the chemical settling tank 9 is sent to the thickening tank 17 via the sludge holding tank 16,
The clear water at 17 is sent to drainage pond 15.

[0006]

However, in the above conventional structure, the ozone contact tank 13 and the activated carbon filter basin 14 are provided.
Even in the treated water that has passed through the advanced treatment facility, microorganisms generated in the activated carbon filter basin 14 may leak out, which has been a problem.

The present invention is intended to solve the above problems, and an object of the present invention is to provide a water treatment facility capable of removing the microorganisms in the treated water that has passed through the advanced treatment facility to make the treated water clear water. To do.

[0008]

In order to solve the above-mentioned problems, the present invention takes raw water from a water source, mixes and coagulates equipment,
In a water treatment facility that purifies raw water through each treatment process of a sedimentation basin, a filtration facility, and an advanced treatment facility, and stores the purified treated water in a water purification reservoir, a microfiltration device is installed between the advanced treatment facility and the water purification reservoir. This microfiltration device is equipped with a treatment tank that stores the treated water that has passed through the advanced treatment equipment, a ceramic filter that is immersed in the treated water and placed inside the treatment tank, and a ceramic filter that is installed outside the treatment tank and has a suction side. The suction pump is connected to the inside of the filter and the discharge side is connected to the water purification pond.

[0009]

With the above-described structure, the treated water in the treatment tank is sucked through the ceramic filter by the suction pump, and the microorganisms contained in the treated water are captured by the fine filtration by the ceramic filter and remain in the treatment tank. The clear purified water that has passed through the filter is extracted to the outside of the treatment tank and sent to the water purification pond via the suction pump.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. It should be noted that the members having the same functions as those of the configuration shown in FIG. 1 to 3, the microfiltration device 21 is provided between the activated carbon filtration basin 14 and the water purification basin 12 of the advanced treatment facility. The microfiltration device 21 has a treatment tank 22 that communicates with the activated carbon filtration pond 14, and a ceramic filter 24 that is disposed by being immersed in the treatment water 23 stored inside the treatment tank 22. 24 is composed of a plurality of ceramic tubes 25 formed in a cylindrical shape, and the inside of the ceramic tubes 25 communicates with the suction side of a suction pump 26 provided outside the processing tank 22. Further, the discharge side of the suction pump 26 communicates with the water purification pond 12.

An air diffuser 27 is provided below the ceramic filter 24, and the air diffuser 27 is a processing tank.
It communicates with the discharge side of a blower device 28 provided outside 22. Further, the bottom of the processing tank 22 communicates with the suction side of the sludge drawing pump 29.

The operation of the above structure will be described below. Treated water supplied from activated carbon filter 14 to treatment tank 22
23 is sucked by a suction pump 26 through a ceramic filter 24, and microbes contained in the treated water 23 are captured by microfiltration by the ceramic filter 24. Further, the rising stirring flow A is generated by the air lift action of the air 30 diffused from the air diffusing unit 27, and the gel layer attached to the surface of each ceramic tube 25 of the ceramic filter 24 is removed by the shearing force of the rising stirring flow A. It Then, the clear purified water 31 that has passed through the ceramic filter 24 is sent to the purified water reservoir 12 via the suction pump 26. The captured microorganisms are discharged to the outside of the treatment tank 22 by the sludge suction pump 29.

[0013]

As described above, according to the present invention, by capturing the microorganisms contained in the treated water by the ceramic filter of the microfiltration device, clear purified water that has passed through the ceramic filter is supplied to the water purification pond. You can

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

FIG. 2 is an overall configuration diagram of a microfiltration device in the example.

FIG. 3 is a schematic view showing a filtering action of the ceramic filter in the example.

FIG. 4 is an overall configuration diagram of a conventional water treatment device.

[Explanation of symbols]

 21 Microfiltration device 22 Treatment tank 23 Treated water 24 Ceramic filter 25 Ceramic tube 26 Suction pump 27 Air diffuser 28 Blower device 31 Purified water

Front Page Continuation (72) Inventor Yoshihisa Naruue 1-247 Shikitsuhigashi Naniwa-ku Osaka Prefecture Osaka Kubota Co., Ltd.

Claims (1)

(57) [Claims] 1. A water treatment facility that takes raw water from a water source, purifies the raw water through each treatment process of a mixing / coagulation facility, a sedimentation basin, a filtration facility, and an advanced treatment facility, and stores the purified treated water in a water purification reservoir. , A microfiltration device is installed between the advanced treatment equipment and the water purification pond, and this microfiltration device is placed in the treatment tank that stores the treated water that has passed through the advanced treatment equipment and in the treatment tank by immersing it in the treated water. Arranged ceramic filter,
A water treatment facility, which is provided outside the treatment tank and has a suction pump that communicates with the inside of the ceramic filter on the suction side and communicates with the water purification reservoir on the discharge side.