JPH11253942A - Immersion type mobile membrane separation wastewater treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a noise-controlled immersion type mobile membrane separation wastewater treatment apparatus which can be transported as an integrated unit of the entire apparatus. SOLUTION: A reaction area 4 and a discharge area 5, which are separated by an partition wall 3, are formed in a tank body 2 in the form of a transportable unit, a membrane separator 7 in which a casing 8 is integrated with the tank body is immersed in the reaction area receiving raw water, plane membrane type membrane cartidges 9 are arranged in parallel in the vertical direction in the casing 8, a filtrate discharge system 12 in which the base end side communicates with the membrane filtrate channel of the membrane cartridge and the tip side communicates with the discharge area is installed, an air diffuser 11 is arranged below the membrane cartridge in the membrane separator 7, and an underwater blower 17 for supplying aeration air to the air diffuser 11 is immersed in the tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a small-scale water treatment facility for sewage and wastewater, and more particularly to a mobile immersion type membrane separation sewage treatment apparatus.

[0002]

2. Description of the Related Art Conventionally, as an example of biological treatment of sewage, wastewater or other treated water, there is a form shown in FIG. 6, in which incoming treated water 41 is received in an aeration tank 42, At 42, the water to be treated is continuously subjected to biological treatment while air is supplied from an air diffuser 43, and a mixed solution 44 in an aeration tank 42 is solid-liquid separated in a sedimentation tank 45.
5 is discharged out of the system through a discharge tank 47, and the sludge settled and separated in the settling tank 45 is returned to the aeration tank 42, thereby suppressing the outflow of the activated sludge to the outside of the system. 42 had increased the sludge concentration.

[0003]

In the event venues and construction sites, temporary toilets are installed for use by people. However, as the size of the event venues and construction sites increases, the number of employees and the frequency of use will increase. Becomes large,
It is difficult to deal with temporary toilets due to the limited number of installations, and if the collection of waste is delayed, unsanitary situations will appear. For this reason, small-scale water treatment facilities are installed at large event venues and construction sites to respond to them.

However, as described above, when the activated sludge is separated by gravity sedimentation in the sedimentation tank 45, it is difficult to maintain the microorganism concentration in the aeration tank 42 at a high concentration due to the low separation efficiency. Therefore, the residence time of the water 41 to be treated in the aeration tank 42 is required to be long, and the tank capacity of the aeration tank 42 is increased. The tank capacity increases.

[0005] For this reason, the aeration tank and the sedimentation tank cannot be configured as an integral unit that can be transported, and when installed at an event site or a construction site, the equipment is divided into a plurality of units and carried in. Later, it is necessary to assemble it locally, and it is made of fiber reinforced plastic (FRP) or concrete (RC). In addition, water treatment facilities intended for short-term use often omit sheds such as machine rooms where auxiliary equipment such as pumps and blowers are arranged,
Noise countermeasures such as those generated by pumps and blowers have been an issue.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a mobile immersion type membrane separation sewage treatment apparatus which can transport the entire apparatus as an integrated unit and has low noise. I do.

[0007]

In order to solve the above-mentioned problems, a mobile immersion type membrane separation sewage treatment apparatus according to the present invention according to the first aspect of the present invention comprises a unit body capable of being transported inside a tank. A reaction area and a discharge area are defined with a partition wall therebetween, and a membrane separation device in which a casing is integrated with a tank body is immersed in a reaction area into which water to be treated flows, and a plurality of flat membrane type membrane cartridges are placed in the casing. Are arranged in parallel in the vertical direction, the base end side communicates with the membrane cartridge, the distal end side is provided with a permeate outlet system communicating with the discharge area, and the air diffuser is arranged below the membrane cartridge in the membrane separation device, An underwater blower that supplies aerated air to the air diffuser is immersed in the tank.

According to a second aspect of the present invention, there is provided a mobile immersion type membrane separation sewage treatment apparatus according to the present invention, wherein a first reaction region and a second reaction region are separated from each other by a partition wall inside a tank unit having a transportable unit. A discharge region is defined, and a communication path is provided between the first reaction region and the second reaction region into which the water to be treated flows, and one of the first reaction region and the second reaction region is connected to the other reaction region. The submersible pump that supplies the liquid in the tank to the reaction area is immersed, the membrane separation device in which the casing is integrated with the tank body is immersed in the second reaction area, and a plurality of flat membrane type membrane cartridges are vertically inserted into the casing. Are arranged in parallel with each other, a permeate outlet system is provided in which the base end side communicates with the membrane cartridge and the distal end side communicates with the discharge region, and an air diffuser is arranged below the membrane cartridge in the membrane separator, and the air diffuser Submersible blower that supplies aerated air to The in which was immersed in the bath.

According to a third aspect of the present invention, there is provided a mobile immersion type membrane separation sewage treatment apparatus according to the present invention, wherein the membrane permeate flow path forms a siphon pipe which is opened below the water surface in the discharge area on the tip side.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4, a mobile immersion type membrane separation sewage treatment apparatus 1 has an independent unit type in which a tank body 2 can be loaded and transported on a vehicle or the like,
Inside the tank body 2, a reaction region 4 and a discharge region 5 are formed with a partition wall 3 therebetween.

A membrane separation device 7 is immersed in the reaction area 4 into which the water 6 to be treated flows, and the membrane separation device 7 is
Is formed integrally with the tank body 2, and a plurality of flat membrane type membrane cartridges 9 are arranged inside the casing 8 in parallel in the vertical direction. The casing 8 accommodates the membrane cartridge 9 in an upper region, and has a plurality of guide grooves 10 on opposite inner surfaces for inserting and arranging the membrane cartridge 9 at regular intervals. Air diffuser 11 arranged below
The lower region also serves as a guide for aerated air.

Each of the membrane cartridges 9 of the membrane separation device 7 is a flat membrane type having an organic filtration membrane disposed on the surface of a rigid filter plate, and the membrane permeate flow path of the filter plate communicates with the permeate discharge system 12. doing. The permeated liquid outlet system 12 is a flexible tube 13 that communicates with the membrane permeate flow path of the filter plate, a liquid collection header 14 that collects and connects the tubes 13, and guides the collected liquid permeated liquid to the discharge area 5. The outlet pipe 15
Of the outlet pipe 5 is located below the water surface of the discharge area 5, and the opening of the outlet pipe 15 is located below the water depth of the drain pipe 16 provided in the discharge area 5. In the reaction area 4, an underwater blower 17 is immersed as a means for supplying aerated air to the air diffuser 11.

In the above-described configuration, the water 6 to be treated flowing into the reaction region 4 of the tank body 2 is circulated in the tank by the air lift effect of the air aerated from the underwater blower 17 through the air diffuser 11, Activated sludge receives oxygen from the air and biologically treats organic substances contained in the water 6 to be treated. Also,
The upward flow generated by the air lift function acts as a scavenging flow on the membrane surface of the organic filtration membrane of the membrane cartridge 9 in the membrane separation device 7 to suppress the adhesion of the cake layer to the membrane surface.

Since the permeated liquid outlet system 12 forms a siphon pipe, the natural water head ΔH ₁ between the liquid surface in the reaction region 4 and the liquid surface in the discharge region 5
Is operated as a driving pressure, and the permeated liquid that has passed through the organic filtration membrane of the membrane cartridge 9 flows through the tube 13 and the collection header 1.
4. While flowing out into the discharge area 5 through the outlet pipe 15,
Activated sludge remains in the tank.

Since the activated sludge in the tank does not flow out of the system, the sludge concentration in the reaction zone 4 can be maintained at a high level, and the residence time of the liquid 6 to be treated in the tank is shortened. 2 can be configured in a small capacity form that can be transported.

As shown by a two-dot chain line 18 in FIG.
The permeate outlet system 12 may be open to the atmosphere instead of the siphon line. However, since the flow rate flowing through the permeated liquid outlet system 12 does not always flow so as to fill the conduit, the air flows into the conduit from the open end, and the atmospheric pressure acts on the top a of the permeated liquid outlet system 12. And the natural head Δ acting as a driving pressure on the membrane separation device 7
H ₂ becomes a water head between the liquid level in the reaction region 4 and the top a of the permeated liquid outlet system 12 indicated by the two-dot chain line 18.

Accordingly, since the permeated liquid discharge system 12 forms a siphon pipe, the membrane separation device 7 is immersed under a shallow water depth regardless of the distance from the liquid surface in the reaction region 4 to the top of the membrane separation device 7. Even in this case, a large natural head can be used as the driving pressure of the membrane separation device 7.

The submersible blower 17 is immersed in the tank as a means for supplying air to the air diffuser 11, so that a blower can be provided without providing a machine room for installing auxiliary equipment such as a pump and a blower. Noise generated from the vehicle can be suppressed.

Further, since the casing 8 is formed integrally with the tank 2, the aerated air can be effectively applied to the membrane cartridge 9 by using the lower region of the casing 8 as a guide, and when the tank 2 is transported. Also, the casing 3 can be stably maintained without separately providing fixing means.

FIG. 5 shows another embodiment of the present invention, in which members having the same functions as those in the previous embodiment are given the same reference numerals and description thereof is omitted. In FIG. 5, the tank 2
Inside, a first reaction region 4a, a second reaction region 4b, and a discharge region 5 are formed with partition walls 3, 3 therebetween, and the first reaction region 4a is anaerobic, and the second reaction region is formed. 4b is aerobic. An overflow weir 31 is provided as a communication passage between the first reaction zone 4a into which the water 6 to be treated flows and the second reaction zone 4b, and the second reaction zone 4b is connected to the first reaction zone 4a. The submersible pump 32 for supplying the liquid is immersed. still,
As another configuration, the overflow weir 31 is configured to overflow from the second reaction region 4b to the first reaction region 4a, and
May be provided in the first reaction region 4a. Also,
It is also possible to provide a submerged weir instead of the overflow weir 31.

In the above configuration, the second reaction region 4
The liquid in the tank b is circulated as a nitrification liquid to the first reaction area 4a through the submersible pump 32, and the liquid in the tank denitrified in the first reaction area 4a is passed through the overflow weir 31 to the second reaction area 4b.
Flows into. On the other hand, the liquid in the tank flowing out of the second reaction area 4b passes through the membrane separation device 7 and flows out to the discharge area 5, so that the activated sludge in the tank does not flow out of the system and the sludge concentration can be maintained at a high concentration. Therefore, the denitrification treatment can be performed in the small-capacity tank body 2 that can be transported.

The submersible pump 32 and the submersible blower 1
By immersing 7 in the tank, the noise generated from the pump and the blower can be suppressed without providing a shed such as a machine room in which auxiliary equipment such as a pump and a blower is disposed.

[0023]

As described above, according to the present invention, a reaction zone and a discharge zone are defined inside a tank body, and activated sludge is separated by a membrane separation device immersed in the reaction zone. The activated sludge concentration can be kept high, and the tank can be made to have a small capacity that can be transported. Since the permeated liquid discharge system forms a siphon conduit, the driving pressure is the large natural head between the liquid level in the reaction area and the liquid level in the discharge area even when the membrane separation device is immersed under shallow water depth. be able to. By immersing the submersible blower and submersible pump in the tank, the noise generated from the blower and the pump can be suppressed without providing a shed such as a machine room in which ancillary equipment such as the pump and the blower is disposed.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an overall configuration of a mobile immersion type membrane separation sewage treatment apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view of the membrane separation device.

FIG. 3 is a sectional view taken on line AA of FIG. 2;

FIG. 4 is a perspective view of the membrane separation device.

FIG. 5 is a schematic diagram showing an overall configuration of a mobile immersion type membrane separation sewage treatment apparatus according to another embodiment of the present invention.

FIG. 6 is a schematic diagram showing the entire configuration of a conventional sewage treatment apparatus.

[Explanation of symbols]

 Reference Signs List 1 mobile immersion type membrane separation sewage treatment apparatus 2 tank body 3 partition wall 4 reaction area 5 discharge area 6 water to be treated 7 membrane separation apparatus 8 casing 9 membrane cartridge 10 guide groove 11 air diffuser 12 permeate extraction system 13 tube 14 Liquid collection header 15 Outlet pipe 16 Drain pipe 17 Submersible blower

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yutaka Yamada 2-47, Shizitsuhigashi 1-chome, Naniwa-ku, Osaka-shi, Osaka (72) Inventor Kazuhiko Kariya 4--11 Minamisenba, Chuo-ku, Osaka-shi, Osaka −20 Inside Kubota Environmental Service Co., Ltd. (72) Inventor Susumu Kawakami 4-11-20 Minamisenba, Chuo-ku, Osaka City, Osaka Inside Kubota Environmental Service Co., Ltd.

Claims (3)

[Claims] 1. A reaction area and a discharge area are defined inside a tank body having a unit type capable of being conveyed with a partition wall therebetween, and a casing is integrated with the tank body in a reaction area into which water to be treated flows. A membrane separation device is immersed, a plurality of flat membrane type membrane cartridges are arranged in the casing in parallel in the vertical direction, and a permeated liquid discharge system is provided in which the proximal end communicates with the membrane cartridge and the distal end communicates with the discharge area. A mobile immersion type membrane separation sewage treatment apparatus, wherein an air diffuser is disposed below a membrane cartridge in the membrane separator, and an underwater blower for supplying aeration air to the air diffuser is immersed in a tank. 2. A first reaction area into which water to be treated flows is formed by partitioning a first reaction area, a second reaction area, and a discharge area with a partition wall therebetween in a tank having a unit type capable of being transported. A communication path is provided between the first reaction region and the second reaction region, and a submersible pump that supplies the tank solution to the other reaction region is immersed in one of the first reaction region and the second reaction region. (2) A membrane separation device in which a casing is integrated with a tank body is immersed in the reaction area, and a plurality of flat membrane type membrane cartridges are arranged in the casing in parallel in the vertical direction. A permeated liquid outlet system that communicates with the discharge area on the side is provided.A diffuser is arranged below the membrane cartridge in the membrane separator, and an underwater blower that supplies aerated air to the diffuser is immersed in the tank. Mobile immersion type membrane separation sewage Processing equipment. 3. The mobile immersion type membrane separation sewage treatment apparatus according to claim 1, wherein the membrane permeated liquid flow path forms a siphon pipe which is opened below the water surface in the discharge area on the distal end side.