JPH01155993A - Multimodule biomembrane filter device - Google Patents

Abstract

PURPOSE:To enable the direct and easy installation of a membrane filter device to water channels of various shapes by forming a multimodule constituted by arranging cylindrical modules packed with carriers such as active carbon to a zigzag shape. CONSTITUTION:The cylindrical modules 12 packed with the carriers 3 such as active carbon, sand, glass or plastic balls are arranged and fixed zigzag to an inside wall 8 of a box body on the water bottom and the upper part thereof is fixed to a stay 10. The respective modules 2 are joined together to form the multimodule which can be freely installed to the existing water channels of various shapes. The surfaces of the multimodule are covered by filter cloths 4 to prevent outflow of the carriers 3 in the modules 2. Furthermore, annular washing units 5 for washing the surfaces of the filter cloths 4 are provided freely vertically movably. Washing water is sprayed from the washing nozzles 6 of the washing device units toward the respective modules 2 to wash the carriers 3 therein and is then discharged from the drain trough of the upper stage 10. The entire part of the multimodule is thus continuously backwashed.

Description

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

[Prior Art] As we enter an era in which water supply is becoming more widespread, there is a need to ensure the quantity of tap water, ensure safe quality of tap water, and supply high-quality, delicious water. In particular, when highly polluted lake water is used as a tap water source, problems such as the generation of off-flavors and trihalomethanes occur, making it difficult to secure safe and high-quality water.

As a countermeasure against this problem, methods have been developed such as using a biological purification method as a pretreatment in a water purification system, or using ozone or activated carbon treatment as an advanced treatment. Among them, biological purification methods are attracting attention because of their low running costs, and current methods include the fly comb tube method, rotating disk method, fluidized bed method, and biological purification methods using carriers using capillary membranes (hollow fibers). There are processing methods etc.

Among these currently used methods, a conventional example of a fixed bed biological treatment facility is shown below.

FIG. 4 is an explanatory diagram of a downward flow type biological treatment facility using a fixed bed method.

In the figure, 21 denotes a packed column, in which a packed bed 23 filled with a packed furnace material 22 is provided. Further, 24 is a raw water pump, 25 is a backwash pump, 26 is a landing well, 27 is a backwash blower, and 27 is an outflow pipe.

The fixed bed biological treatment equipment shown in FIG. 4 is composed of a packed tower 21, a raw water pump 24, a backwashing pump 25, and a backwashing blower 27. Measures such as light shielding are being taken to prevent this.

The raw water is passed in a downward flow manner from the upper part of the tower filled with the granular packed P material 22, and the treated water is discharged from the outflow pipe 28 set at approximately the same level as the top surface of the packed furnace material 22. The filtration resistance of the packed tower 21 increases due to the pollutants and excess sludge captured in the packed furnace material 22, and when a certain water head value is reached, backwashing is performed in a batch manner.

This method has drawbacks such as the fact that continuous operation is not possible because it is a batch method, or it is necessary to install many packed towers when it is necessary to increase the throughput.

[Problems to be solved by the invention] ' Raw water from tap water mainly contains organic matter and algae debris, and has a high oxygen concentration, so biological treatment is performed.
The main body of this tap water purification system is filtration.

In treating raw water from tap water as described above, the present invention provides the following features:
The object of the present invention is to provide a multi-module biofilm filtration device that solves the problems in conventional biological treatment methods.

[Means for Solving the Problems] The present invention forms a multi-module in which cylindrical modules filled with carriers such as activated carbon, sand, glass, plastic balls, etc. are arranged in a staggered manner, and each of the modules is arranged in a staggered manner. This is a multi-module biofilm filtration device characterized in that the surface is covered with a filter cloth and a ring-shaped cleaning device unit for cleaning the filter cloth surface of each module is vertically movable.

[Function] As shown in FIGS. 1 and 2 of the embodiment described later, the device of the present invention has cylindrical modules filled with carriers such as activated carbon, sand, glass, and plastic beads arranged in a staggered manner. Since it is formed into a multi-module, it can be easily installed in various types of water streams, and the surface of the 7/I/f module is covered with a filter cloth to prevent the carrier inside the module from flowing out. As shown, a vertically movable cleaning device unit for cleaning the surface of the filter cloth of the multi-module is provided, making backwashing easy and allowing continuous backwashing and drainage.

Furthermore, since raw water from tap water contains a lot of algae, it is possible to create a small elastic body by bending fibers as shown in Figure 3, and use a filter cloth made of non-woven fibers to increase the porosity. It has low water flow resistance and can increase processing capacity.

Next, examples of the present invention will be described.

[Example 1] Figures 1 and 2 are explanatory diagrams of a multi-module biofilm filtration device of the present invention, and Figure 3 is an explanatory diagram of a filter cloth.

In the figure, 1 is a multi-module, 2 is a module,
3 is a carrier, 4 is a filter cloth, 5 is a cleaning device unit, 6 is a cleaning nozzle, 7 is a cleaning telescopic tube, 8 is an inner wall of the body, 9 is a filter cloth fiber, and 10 is a stage.

First, the present invention will be explained with reference to FIGS. 1 and 2.

As shown in the figure, activated carbon, sand, glass, plastic balls, etc. (plastic balls were used in this example) were placed in the water stream.

) Cylindrical modules 2 filled with carriers 3 are arranged and fixed in a staggered manner on the wall 8 of the frame at the bottom of the water, and the upper part is fixed to the stage 1.
0, and each module 2 is combined to form a multi-module 1.

In addition, the surface of the module 2 is covered with a filter cloth 4, and the module 2
This prevents the carrier 3 inside from flowing out.

The P cloth 4 used in this case may be a commonly used one, but as shown in FIG. If a non-woven fabric with a three-dimensional mesh pattern structure is used, the porosity is large, the resistance to water flow is small, and the processing capacity can be increased.

The diameter of the fibers 9 constituting the filter cloth 4 is preferably from 100 deniers to 1000 deniers, and in this embodiment, the diameter is 5 deniers.
00 denier was used.

The filter cloth 4 is processed to have a porosity of 93%.

Further, a cleaning device unit 5 for cleaning the surface of the multi-module 1 is fixedly installed on the upper stage 10.

The stage 10 is provided with a cleaning device unit 5, a cleaning drainage trough (not shown), and the like.

As shown in FIG. 2, the cleaning device unit 5 includes a ring-shaped cleaning nozzle 6 at the tip of a cleaning telescopic tube 7 that is vertically expandable.
is attached.

During cleaning, the cleaning device unit 5 is moved up and down the cleaning telescopic tube 7 using the weight of each module, and cleaning water is sprayed from the cleaning nozzle 6 via a cleaning pump (not shown) for cleaning. The cleaning water blown into the module 2 from the cleaning nozzle 6 cleans the carrier 3, goes to the upper part of the module 2 as shown in the figure, and is discharged from a drainage trough provided on the upper stage 10.

By performing backwashing on two sides of each module in this way, the multi-module 1 as a whole is backwashed continuously.

Furthermore, it is preferable to attach a rubber seal to the cleaning nozzle 5 to improve sealing performance, and a roller to improve running properties.

With the multi-module biofilm filtration device of the present invention configured in this way, backwashing is easy, and since the backwash wastewater is consolidated instead of having a separate backwash wastewater trough, the backwash wastewater and treated water can be easily combined. It can be processed cleanly without any mixing.

[Effects of the Invention] According to the multi-module biofilm filtration device of the present invention, (1) It is convenient because it can be directly installed in an existing waterway at will.

(2) Continuous backwashing is possible and the treated water is clean.

(3) No outflow of carrier.

It has the following effects.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams of the multi-module biofilm filtering device of the present invention, Figure 3 is an explanatory diagram of Sawafu, and Figure 4 is an explanatory diagram of the downward flow biological treatment equipment using the fixed bed method. It is. In the figure, 1: Multi-module, 2: Modineal,
3: Carrier, 4: P cloth, 5: Cleaning equipment unit, 6: Cleaning nozzle, 7: Telescopic tube for cleaning, 8: Internal wall of frame, 9: P cloth fiber, 10: Stage, 21: Packed tower, 22: Filling P material,
23: Filled bed, 24: Raw water pump, 25: Backwash pump, 26: Water landing well. 27: Backwash blower, 28: Outflow pipe. Note that the reference numerals in the middle of each figure indicate the same or equivalent parts.

Claims (1)

[Claims] A ring-shaped cleaning device for forming a multi-module formed by arranging cylindrical modules filled with carriers in a staggered manner, covering the surface of each module with a filter cloth, and cleaning the surface of the filter cloth of each module. A multi-module biofilm filtration device characterized by a unit that is movable up and down.