JPH0515879A - Device for processing circulating water - Google Patents

Abstract

PURPOSE:To suppress propagation of bacterial in circulating water at a low cost. CONSTITUTION:This device is provided with a drum filter 5 equipped with a cleaning device 7 to remove suspended matters in waste water from water- using part (A) and a membrane filtration device 6 equipped with a membrane cleaning device 8 to remove bacteria in supplied water from the drum filter 5. Thus, the contact surface of water is made antibacterial.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the textile industry, paper industry,
Electronic component industry, precision machinery industry, and the like, a treatment device for circulating water used for recycling water, specifically, a means for collecting used waste water from a water use part and sending it to the water use part, The present invention relates to a device provided with a water treatment means for treating the water supplied thereby.

[0002]

2. Description of the Related Art Conventionally, as a water treatment means, a coagulation sedimentation (or pressure flotation) tank, a sand filter, and a cartridge filter are sequentially fed to a suspended substance in waste water used.
For example, a non-woven fabric manufacturing wastewater is provided for removing hair, a papermaking wastewater removing pulp waste, and a fiber manufacturing wastewater for removing soot. That is, in the past, it was intended to clarify.

[0003]

However, according to the above-mentioned conventional technique, although the concentration of organic matter in the circulating water is higher than that of river water, well water, etc. Since no measures against it had been considered, the bacteria were growing. The growth of this bacterium causes the generation of slime. As a result, the water that comes into contact with the product becomes a mixture of bacteria and slime, and furthermore, the sand filter and the cartridge filter have the drawback that they are clogged early with bacteria and slime. In particular, when the water use part sprays water from a nozzle, there is also a drawback that the nozzle hole is blocked by bacteria or slime. In addition, it is conceivable to combine conventional chemical treatment with conventional technology in the water treatment of sterilizing water by adding a sterilizing agent such as sodium hypochlorite to water. Since the concentration of organic substances in water is high, not only does it require a large amount of chemicals, which results in soaring treatment costs, but it is applicable only when chemicals are added as water. It has the drawback of lacking. The object of the invention is to prevent the growth of bacteria without incurring an increase in cost,
As a result, the point is to provide a circulating water treatment apparatus that can achieve sterilization and is highly versatile.

[0004]

The circulating water treatment apparatus according to the present invention is characterized in that the water contact surface of the water supply means is made antibacterial and the water treatment means is constituted by a residue removal device for removing suspended solids. A membrane filter for sterilization, a cleaning device for cleaning the residue removing device, and a membrane cleaning device for cleaning the membrane of the membrane filtering device are provided. The means for antibacterializing the water contact surface is preferably means for forming the water contact surface from a resin containing an antibacterial agent that kills the bacteria upon contact with the bacteria.

[0005]

Since the water contact surface of the water supply means is made antibacterial and the bacteria come into contact with the water contact surface to kill the bacteria, the growth of the bacteria in the water supply means can be prevented. Moreover, not only is a decontamination device provided to remove suspended solids, but a membrane filtration device using an ultrafiltration membrane or microfiltration membrane is also provided to remove bacteria. The number of bacteria inside can be reduced. In addition, by providing a cleaning device and a film cleaning device,
Since the suspended solids and bacteria captured by the removing device and the membrane filtering device are discharged to the outside of the system, the performance of the removing device and the membrane filtering device can be favorably maintained. In particular, when the water contact surface is made antibacterial by forming the water contact surface from a resin containing an antibacterial agent that kills the bacteria by contact with the bacteria, the element forming the water contact surface may be composed of an antibacterial agent-containing resin. Alternatively, the water contact surface can be easily made antibacterial by using the resin forming technique of the present day such as coating the element with the resin containing the antibacterial agent as it is.

[0006]

Therefore, according to the present invention, it is possible to prevent the growth of bacteria without changing the chemical properties of water by physical sterilization and sterilization, rather than by chemical treatment which increases running costs. The cost is low, and the versatility is so high that it can be used in any water circulation equipment.

[0007]

EXAMPLE As shown in FIG. 1, the water circulation use facility is equipped with a circulation use water treatment device for treating the used waste water from the water use portion A, which is used by high-pressure jetting of water, and returning it to the water use portion A. There is. The water use unit A includes a pump A1 for pressurizing water, a plurality of nozzles A2 for injecting pressurized water, and a nozzle A for pressurizing water.
2 and a header A3 for distribution. The circulating water treatment device includes a water supply means for collecting the used wastewater from the water use part A and sending it to the water use part A, and a water treatment means for processing the water supply thereby. The water supply means,
A receiving tank 1 for receiving the used waste water from the water using section A, a tank 2 for storing the treated water and supplying it to the pump 1A, and sending water from the receiving tank 1 to the tank 2 through each treating section of the water treatment means. The water pump 3 and the pipe 4 group are provided.

[0008] The water treatment means includes the first to the first receiving tanks.
Drum filter 5 as a removing device for removing suspended solids in the water sent through the pipe 4 and the suspended solids sent from the drum filter 5 through the second pipe 4 have been removed. A membrane filtration device 6 for removing bacteria in the water and supplying it to the tank 2 through a third pipe 4.
A cleaning device 7 for cleaning the drum filter 5 to discharge trapped suspended solids, and a membrane cleaning device 8 for cleaning the membrane filtration device 6 to discharge trapped bacteria. The membrane filtration device 6 is for removing bacteria by using an ultrafiltration membrane or a microfiltration membrane. The cleaning device 7 is composed of a water supply pipe 7A with a water supply pump 7a for taking out the water in the tank 2 as cleaning water and supplying it to the drum filter 5, and a drain pipe 7B for discharging the cleaning wastewater to a drainage section 9, Membrane cleaning device 2
Also, a water supply pipe 8A with a water supply pump 8a for extracting the water in the tank 2 as cleaning water and supplying it to the membrane filtration device 6,
The drainage pipe 8 </ b> B drains the cleaning wastewater to the drainage unit 19.

Then, the receiving tank 1, the tank 2 and the piping 4
Water supply for groups, pumps 3, piping 4 joints, joint packings, etc.
The water contact surface of the components of the means and the drum 5A, the container 5B, etc.
Components of the drum filter 5 and a membrane filtration device such as the container 6A
The water contact surface of the components of the device 6, the cleaning device 7, and the membrane cleaning device
8 water supply pipes 7A, 8A and water supply pumps 7a, 8a
And are made antibacterial respectively. The means to make the wetted surface antibacterial is
Resin containing an antibacterial agent that kills bacteria by contact with them
Is a means for forming a water contact surface from
Olefin-based resins such as ethylene and polypropylene
Japanese polyester resin, vinyl ester resin, epoxy
Constructed from thermoplastic or thermosetting resin material such as resin
When the component is made, the resin material of the component is antibacterial.
The agent is mixed to make the entire component antibacterial, and non-resin such as metal
Contains antibacterial agents when constituents consist of fatty materials
By coating the resin material on the components,
Antibacterial. The antibacterial agent is synthetic zeolite or ion exchange.
Ion-exchange groups such as ion-exchange groups such as
Ion-exchanged metal ions such as lead ions,
Soluble inorganic substances loaded with metal ions such as silver ions
Of. And to give the resin surface antibacterial activity
The content of the antibacterial agent in the resin is
If the on-exchange group is a silver ion exchanged
In total, it is about 1 to 10% by weight of the resin. Configured like this
In the circulated water treatment device, the membrane by the membrane cleaning device 8 is used.
Cleaning the filtration device 6 from the growth cycle of bacteria within 60 minutes
Also repeats in a short cycle.
This prevents the growth of bacteria in the filter device 6. And
According to the observation of the present inventor, KMnO_FourWith consumption as an indicator
When the concentration of organic matter in the circulating water is 20ppm or more
In the case of conventional methods that do not perform antibacterialization and sterilization of the water contact surface,
The number of bacteria is 10⁶(Pieces / ml) never fell below
In addition, although the bacterium proliferated significantly during the operation stop,
In the apparatus of the embodiment, the number of bacteria is 10 ³(Piece / ml) or more
10²Stable at the level of (pieces / ml)
In addition, the bacteria did not grow during the operation stop.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram.

[Explanation of symbols]

A water use department 5 Waste removal device 6 Membrane filtration device 7 Cleaning device 8 membrane cleaning equipment

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shinichi Kunisaki             1023-1 Yamazaki, Shimamoto-cho, Mishima-gun, Osaka Prefecture             Inside the Technology Development Center (72) Inventor Hiroaki Sasaki             1023-1 Yamazaki, Shimamoto-cho, Mishima-gun, Osaka Prefecture             Inside the Technology Development Center (72) Inventor Goro Fujiwara             1-32 Dojimahama, Kita-ku, Osaka City, Osaka Prefecture             Takuma Co., Ltd. (72) Inventor Mitsunobu Masuda             1-32 Dojimahama, Kita-ku, Osaka City, Osaka Prefecture             Takuma Co., Ltd. (72) Inventor Masanori Shiraishi             1-32 Dojimahama, Kita-ku, Osaka City, Osaka Prefecture             Takuma Co., Ltd.

Claims (2)

[Claims] 1. A circulating water treatment system provided with a water supply means for collecting used wastewater from the water use section (A) and sending it to the water use section (A), and a water treatment means for treating the water supply thereby. A device for decontaminating a water contact surface of the water supply means to constitute the water treatment means, a decontamination device (5) for removing suspended solids, a membrane filtration device (6) for disinfection, and A circulating water treatment device provided with a cleaning device (7) for cleaning the removal device (5) and a membrane cleaning device (8) for cleaning the membrane of the membrane filtration device (6). 2. The circulating water treatment apparatus according to claim 1, wherein the means for antibacterializing the water contact surface is a means for forming the water contact surface from a resin containing an antibacterial agent that kills the bacteria upon contact with the bacteria.