JPH01155992A - Membrane water collecting block - Google Patents

Abstract

PURPOSE:To efficiently backwash partition walls of membranes, biomembranes and filter layers by providing valves to the front ends of water collecting holes provided to a box body and mounting fine-porous membrane rubber to the upper part of the box body. CONSTITUTION:After raw water is filtered by the biofilter layer 17, the water is introduced into the water collecting holes 12 of the box body 11 of a membrane water collecting block. The check valves 13 provided in the box body 11 are opened inward and the filtered water is collected. On the other hand, the fine-porous membrane rubber 15 in the upper part of the box body 11 has the extremely fine pores and, therefore, the filtered water is not discharged from air ejection holes 14. The holes 12 of the box body 11 are sealed and closed by the check valves 13 and further, the washing water is discharged from the air ejection holes 14 of the box body 11, by which the fine-porous membrane rubber 15 is expanded and bent toward the outside around the fixing end 16 of the membrane rubber in the case of back washing. The washing water washes the filter layer 17 through the porous membrane rubber 15 from the hole of the box body 11 in this state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a membrane water collection block for a biofilm filtration device used for the treatment of raw water water.

[Prior art] In recent years, raw water such as lake water, semi-lake water, river water, etc. has become increasingly contaminated, and when using these raw waters as tap water, it is necessary to
It is necessary to remove algae, odor substances, ammonia nitrogen, etc. contained therein.

For this reason, organic substances in raw water are stabilized and converted into solid substances that are easy to precipitate by utilizing the metabolic effects of living organisms, and methods used for this purpose include biological treatment methods and the like.

Living organisms extract energy from their own cytoplasm (autolysis process), synthesize their own cytoplasm (anabolic process), and extract energy from substrates (respiration or oxidation process).
doing the process.

These currently used biological treatments include a biological catalytic oxidation method (fly comb tube method), a rotating disk method, a fluidized bed method, and a biological treatment method using a carrier using a capillary membrane (hollow fiber).

Figures 3 and 4 show a fixed biofilm filtration device among these methods.

In the figure, 1 is a biofilm filter tank, 2 is a furnace material, 3 is a filter bed,
4 is a perforated block type water collection device, 5 is a support layer, 6 is an intermediate cleaning pipe, 7 is a jet orifice, 8 is an air orifice, and 9 is a water orifice.

The fixed biofilm filtration device shown in this figure has a circular or rectangular biofilm filtration tank 1 filled with porous granular P material 2 as an adhesion medium to form a P bed 3, and raw water is passed through it in a downward flow. This is a device that biologically oxidizes and filters pollutants in raw water by bringing them into contact with diffused air in countercurrent flow within the P bed 3.

The P bed 3 is automatically and periodically cleaned using air and treated water. Also, at the bottom of this device, as shown in FIG. 4, there are a jet orifice 7, an air orifice 8. A perforated block type water collection device 4 is installed which evenly collects and distributes aeration, treated water, and backwash water through a water orifice 9, and a supporting layer 5 of several layers of gravel from 6 to 30III11 is placed on top of the water collection device 4. P bed 3 is filled with filter medium 2 on which biofilm is attached.
It is said that

In addition, an intermediate cleaning pipe 6 is provided slightly above the middle part of the P floor.
The P bed 3 is cleaned efficiently.

Although the fixed biofilm filtration device described above has many advantages such as a small footprint and easy maintenance, the perforated block type water collection device 4, which evenly collects and distributes aeration, treated water, and backwash water, The problem was that the number of various orifices for air, treated water, and backwash water was large, making it impossible to collect water more easily with one device.

[Problems to be Solved by the Invention] The present invention solves the problems in the conventional biological treatment methods as described above by performing aeration in a biological filtration treatment device, collecting treated water, etc. in one system. The purpose is to provide a water collection device.

[Means for Solving the Problems] The water collection device of the present invention includes a water collection hole provided in a target, a valve provided at the tip of the water collection hole, and a microporous membrane provided above the target. This is a membrane water collection block characterized by having rubber attached to it.

[Function] The membrane water collection block device of the present invention, as shown in FIGS. 1 and 2 of the embodiment described later, has water collection holes in the target body, a microporous membrane is fixed on the upper part, and Since a valve is installed at the tip of the water collection hole, the filtered water can be filtered efficiently.Furthermore, since a valve is installed inside the target body, during backwashing, the microporous membrane expands as shown in the diagram, and the cleaning water and air bubbles etc. Cleaning is facilitated by release through a porous external membrane diaphragm.

Next, examples of the present invention will be described.

[Example] FIGS. 1 and 2 are explanatory diagrams of the operation of the membrane water collection block of the present invention during water collection and backwashing.

In the figure, 11 is a body made of PvC, 12 is a water collection hole, 1
3 is a check valve, 14 is a blowhole, 15 is a microporous membrane rubber, 16 is a membrane rubber fixed end, and 17 is a biological filtration layer.

First, the filtered water that has passed through the biological filtration layer 17 of the biological filtration treatment device is introduced into the water collection hole 12 of the target 11 of the membrane water collection block, as shown in FIG.

In this case, the check valve 13 provided inside the target 11 opens inward to collect the filtered water.

The finely porous membrane rubber 15 on the upper part of the one-sided body 11 has very fine pores, so that the filtered water is not discharged from the blowhole 14.

In addition, in the case of backwashing with washing water, as shown in FIG. 2, the water collection hole 12 of the target 11 of the membrane water collection block
3, the cleaning water is discharged from the fumarole 14 of the target 11, and the microporous membrane rubber 15, which has extremely fine holes, is moved outward with the fixed end 16 of the membrane rubber as a fulcrum, as shown in the figure. It is expanded, folded and cleaned.

The washing water washes the filter layer 17 through the perforated membrane rubber 15 from the holes in the target 11 as shown by the arrow.

Note that air bubbles also flow out.

Although I used PvC for the body 11, it could also be made from SS.
Further, although a tubular shape is used, other shapes may be used. Further, the water collection hole 12 can be placed anywhere on the target 11, but it is preferable to place it at the bottom.

stomach.

[Effects of the Invention] The membrane water collection block having a diaphragm of the present invention is convenient for collecting filtrate water, and is particularly effective in backwashing membrane diaphragms, biofilms, filtration layers, etc. It is.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams of the operation of the membrane water collection block of the present invention during water collection and backwashing, and Figures 3 and 4 are conventional fixed biofilm filtration devices and perforated block type water collection devices. FIG. In the figure, there is a biofilm filtration tank, 2: furnace material, 3: P bed, 4
: Perforated block type water collection device, 5: Support layer. 6: intermediate cleaning pipe, 7: jet orifice, 8: air orifice, 9: water orifice, 11: - body. 12: Water collection hole, 13: Check valve, 14: Fumarole. 15: Microporous membrane rubber, 16: Membrane rubber fixed end, 17: P overlayer. Note that the reference numerals in the middle of each figure indicate the same or equivalent parts.

Claims (1)

[Claims] A water collection hole is provided in the box, a valve is provided at the tip of the water collection hole,
A membrane water collection block characterized in that a microporous membrane rubber is attached to the upper part of the box.