JP2857267B2 - Sewage treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to the biological treatment of sewage after biological treatment.
Light pollution such as treated water and highly polluted river water
The present invention relates to a sewage filtration apparatus for filtering water through a filter immersion filter bed formed of a string contact material .

[0002]

2. Description of the Related Art Conventionally, for treatment of relatively light polluted water such as treated water and river water after treatment, a contact aeration method and a sand filtration method have been adopted.

[0003]

[SUMMARY OF THE INVENTION However, conventional contact aeration becomes apparatus large, there is a problem that equipment cost increase, sand filtration method, washing of the sand becomes non charge amount, filtered <br /> There is a problem that the function is likely to be damaged.

[0004] The present invention has been made in view of the above problems, biological by filtration immersion filter bed formed by the cord strip contacting member
Relatively mild polluted water such as treated water and river water
It is an object of the present invention to provide a sewage filtration apparatus that can be easily constructed, is small in size and is inexpensive, and is easy to maintain and manage.

[0005]

SUMMARY OF THE INVENTION A sewage filtration treatment apparatus of the present invention is characterized in that the ratio of treated water, river water and the like after biological treatment of sewage is improved.
Filtration immersion including a filter tank main body into which sewage of relatively light polluted water flows, and a number of string-like contact members vertically disposed from the surface of the dirty water to the vicinity of the bottom in the filter tank main body A filter bed, and an air backwashing device disposed below the filter immersion filter bed and blowing air, wherein the filter immersion filter bed is
A plurality of pairs in which the string-shaped contact members are vertically arranged with the longitudinal direction orthogonal to the flowing direction of the sewage and horizontally disposed so as to face the water surface position and the vertical position near the bottom of the filtration tank body. These support rods are arranged along a large number of planes in which the string-shaped contact material crosses back and forth in the flow direction of the sewage, and a row of the adjacent upstream rows in the flow direction of the sewage is provided. The string-shaped contact members in the row on the downstream side are arranged downstream of the interval between the cord-shaped contact members.

[0006]

The sewage filtration apparatus according to the present invention uses a string-like contact material of a submerged filter bed vertically stretched between a pair of supporting rods, by using a biological material.
Relatively mild polluted water such as treated water after river treatment and river water
The staggered arrangement of the rows before and after crossing the sewage flow direction makes it possible to increase the density of the string-like contact material by narrowing the spacing before and after each row and increasing the number of rows of string-like contacts. The sewage that traverses the material does not go straight in the gap between the string-like contact materials, but collides with the next row of string-like contact materials and flows across it. And filtered. Further, the staggered arrangement of the string-like contact members is such that the pair of support rods having the string-like contact members attached at intervals are opposed to the horizontal and vertical positions perpendicular to the flow direction of the waste water, It is only necessary to displace the positions in the front and rear rows crossing the distribution direction, and the workability is improved. In addition, when sludge accumulates in the string-like contact material and the filtration effect decreases,
Air is sprayed from a lower air backwashing device to wash away sludge adhering to the cord-like contact material.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a sewage filtration apparatus according to an embodiment of the present invention.

In FIG. 1 and FIG. 2, reference numeral 1 denotes a filter tank main body having an open upper surface. The filter tank main body 1 is provided with a sewage inflow port 2 at one lower end thereof, and an overflow filtration water outlet at an upper end thereof. 3 are formed.

[0009] Filtration tank body 1 in the filtered water surface position and near the bottom in the vertical position between the perpendicular to the water flow the filter tank body 1 in the width direction a and a number of support rod 4 relative to the horizontal direction,
5 is erected. A large number of string-like contact members 6 are stretched at appropriate intervals in the vertical direction between the upper and lower support rods 4 and 5. The string-shaped contact member 6 has a loop-shaped portion 6a of a large number of fibers formed around the string-shaped knitted fabric, and the floating portion is trapped by the loop-shaped portion 6a.

Then, filtration is performed by a large number of groups of the string-shaped contact members.
An over- soaked filter bed 7 is formed. Moreover, in the row of the string-shaped contact members 6 adjacent to the front and rear in the water flow direction, at the intermediate position of the interval between the string-shaped contact members 6 in the front row located on the upstream side in the flow direction of the waste water, the downstream in the flow direction of the waste water. The string-like contact members 6 in the rear row located on the side are arranged so as to be located.

Meanwhile, 8 air backwash device, the air backwash device 8 is positioned below the filtration immersion filter bed 7 is provided at the bottom of the filtration tank body 1, the air backwash device 8 filtration The bottom of the tank main body 1 is provided with a plurality of blower tubes 9 arranged in the width direction of the filter tank main body 1, and a large number of blast holes 10 are formed on the peripheral surface of the blower tube 9.

Further, a rectifying plate 11 is provided in front of and behind the air backwashing device 8 from the bottom of the filter tank main body 1, and a discharge valve 14 is connected halfway from the sludge reservoir 12 surrounded by the rectifying plate 11. A sludge extraction pipe 13 is drawn out of the filtration tank body 1.

Next, the operation of the above embodiment will be described.

The sewage inflow 2 flows into the filter tank body 1
Relatively light pollution such as treated water or river water after biological treatment
Raw water is wastewater turbid consists many string-like contact member 6 filtration
The suspended matter is captured by the string-like contact material 6 by passing through the over- soaked filter bed 7 in the direction traversing the string-like contact material 6 standing in the vertical direction, and the purified filtered water overflows from the outlet 3. I do.

At this time, if the spacing between the string-shaped contact members 6 is close, the filtering effect of the suspended matter is increased, but the flow path is easily blocked. Of the cord-like contact material 6 as shown in FIG.
Is located at an intermediate position between the string-shaped contact members 6 in the front row located on the upstream side in the flow direction of raw water, and the string-shaped contact members 6 in the rear row located on the downstream side in the flow direction of raw water are located at the middle position. Floating material passing through the first row of the multiple rows of string-like contact members 6 arranged in a direction crossing the flow back and forth collides with the second row of string-like contact members 6. And captured
The suspended matter that has passed through the row collides with the string-shaped contact material 6 in the third row and is captured, and the collision is repeated in a multi-step manner, thereby increasing the clarity of the filtered water.

The staggered arrangement of the string-shaped contact members 6
The occurrence of a short-circuit flow, a deviated flow, and a circulating flow in the filtration tank main body 1 are prevented, and the flow can be made closer to the ideal flow state of the extrusion flow.

Further, if a large amount of sludge adheres to the string-shaped contact material 6 after continuous use, the flow of the wastewater is stopped,
The sludge is separated by blowing air from a blowing hole 10 of a blower pipe 9 of the air backwashing device 8. Since the separated sludge is deposited in the sludge reservoir 12, the sludge is discharged by opening the discharge valve 14 of the sludge drawing pipe 13.

[0018]

According to the sewage filtration treatment apparatus of the present invention, a pair of support rods in which a large number of cord-like contact members are stretched at intervals are used to treat treated water after biological treatment, river water, and the like. Relatively mild
The vertical and horizontal positions of the polluted water are perpendicular to the flow direction of the sewage, and the staggered positions of the front and rear rows traversing the flow direction of the sewage are staggered. the density of the string-like contact member Te can be enhanced, biological
Relatively mild polluted water such as treated water after river treatment and river water
Sewage can be increased efficiently captured by filtration effect without straight spacing string-like contact member, cleaning the relatively mild polluted water without such also require power for aeration with a simple apparatus It is possible to arrange the support rods with the string-shaped contact material in a zigzag pattern simply by displacing the positions,
Since the workability can be improved and the string-like contact material can be easily and reliably cleaned using the air backwashing device below, the cleaning does not become insufficient and the maintenance is easy. .

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view of a sewage filtration apparatus showing one embodiment of the present invention.

FIG. 2 is the same on the side view.

FIG. 3 is an operation explanatory view of the contact material.

[Explanation of symbols]

1 Filtration tank body 4, 5 Supporting rod 6 String contact material 7 Filtration immersion filter bed 8 Air backwashing device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takao Kitamine 36-1 Kitayama-cho, Toyohashi-shi, Aichi Prefecture (72) Inventor Hiroyuki Watanabe 34-34 Higashihirai, Kagiya-cho, Tokai-shi, Aichi 18 (72) Inventor Masahiro Imura Aichi 3-601 Ueda, 3-chome Ueda, Tenpaku-ku, Nagoya-shi No. 2-505, Meiko 2-72 (72) Inventor Kensuke Suzuki 2-34, Ishikamidaidai, Nerima-ku, Tokyo

Claims (1)

(57) [Claims] 1. A method for treating treated water or river water after biological treatment.
A filtration tank body into which sewage of relatively light polluted water flows,
A filter immersion filter bed provided with a number of string-like contact members vertically disposed from the surface of the sewage to the vicinity of the bottom in the filter tank main body, and blasting air provided below the filter immersion filter bed An air backwashing device, wherein the filtration immersion filter bed is opposed to a water surface position of the filtration tank main body and an upper and lower position near the bottom, and a longitudinal direction is disposed horizontally and orthogonal to a flow direction of the sewage. It has a plurality of pairs of support rods which stretch the cord-like contact material vertically with an interval, and these support rods are arranged along a large number of planes in which the cord-like contact material crosses the flow direction of the wastewater back and forth. The string-shaped contact members in the downstream row are arranged and arranged on the downstream side of the interval between the string-shaped contact members in the upstream row in the flow direction of the contaminated water that are arranged and adjacent to each other. Sewage filtration equipment.