JPS6211637B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water treatment medium that is used as a filter medium or a microorganism adhesion medium to purify wastewater and has a high adhesion effect for suspended solids, and a method for producing the same. .

Conventionally, filter paper, filter cloth, ceramics, wire mesh, etc. have been used as filter media for purifying wastewater, but these have a small contact area between the liquid to be filtered and the filter media, so they are difficult to remove suspended solids in the liquid. The adhesion effect to the filter medium is low, so a sufficient filtration effect cannot be expected, and if an attempt is made to obtain a sufficient filtration effect, the amount of force filtration will be reduced, that is, the so-called filtration efficiency will be reduced. It has the following drawback.

The present invention solves the above-mentioned drawbacks, and aims to provide a water treatment medium that is made of a fiber mass in which a plurality of short fibers are entangled with each other and has a high effect of adhering suspended solids, and a method for producing the same. It is something to do.

The configuration of the present invention will be explained in detail below.

Filter media used to separate water and solids allow the passage of filtrate, but block the passage of suspended solids.
It is necessary to have a fine mesh surface with numerous water passage holes for attaching or fixing this to the surface of the filter medium. The greater the number of water holes, the greater the amount of filtrate to be filtered, that is, the greater the filtration efficiency.
In addition, the larger the area of the mesh surface, the larger the amount of suspended solids that will adhere to or remain on the filter media surface, and the degree of water purification, that is, the filtration effect, will be enhanced. By entangling appropriate types of fibers in an appropriate manner, it is possible to obtain a water treatment medium that serves as a filter medium that satisfies the above conditions. This takes advantage of the fact that fibers tend to get tangled and can form extremely complex block structures.The reason these fibers get tangled easily is that they are very long compared to their thickness and bend easily. Even with extremely small external forces, it can bend in multiple directions,
The so-called pilling phenomenon occurs because the fibers twist or tangle to form a mass with random orientation, for example, fluff protruding from the surface of clothing or other fabric becomes entangled to form a bead-shaped or ridge-like mass. This is due to this characteristic. Therefore, the formation of fiber lumps due to entanglement occurs with any type of fiber, and the structure of the formed fiber lumps is also diverse, but the size, shape, and state of entanglement of the fiber lumps depend on the thickness and length of the fibers. It is determined by the physical properties and surface structure of the fiber such as Young's modulus, stiffness, density, and coefficient of friction, as well as the manufacturing method of the fiber mass. Organic fibers and inorganic fibers such as glass fibers, metal fibers, mineral fibers, etc.
By manufacturing a fiber mass by the method described below by selecting the fiber mass as appropriate, it is possible to obtain a fiber mass for a desired water treatment medium in which a plurality of short fibers are entangled with each other. I can do it. However, the length of the fiber is 5 to 50 mm,
It is also preferable to use non-crimped short fibers. In other words, if a fiber of 5 mm or less is used, fiber clumps are less likely to occur, and if a fiber of 50 mm or more is used, as shown in Figure 1, the fibers will form a knot so tightly that they cannot be separated, resulting in a chain. This is because they connect together to form a fairly long fiber mass of 20 cm or more, making it difficult to use as a water treatment medium.

Next, the manufacturing method will be explained. FIG. 2 shows a device for its production, in which an appropriate amount of short fibers 3 is supplied from an input hopper 2 into an aeration tank 1 filled with water W, and an air blowing nozzle 4 at the bottom of the aeration tank 1 is used to By continuously blowing air A into the aeration tank 1, short fibers 3
Make the group float and flow. As a result, the short fibers 3 vibrate, flow, fold, and bend under the action of the blown air A. When the above action is repeated, adjacent short fibers 3 contact and connect, and further connect other short fibers 3 to form a fiber mass.
Take it out. The production of this fiber mass requires at least 10
It is necessary to spend at least 30 minutes, preferably at least 30 minutes. The shape of the fiber mass produced by the above method can be roughly divided into two shapes: bead shape and twisted yarn (rod) shape, based on observation of the behavior of the fiber mass. That is, Fig. 3 shows a structural model of the fiber mass. When the short fibers 3 have a thickness of 10 deniers or less, they form a rod-shaped fiber mass with a length of about 30 mm as shown in A, and when they have a thickness of 15 deniers or more, they form rod-shaped fiber masses. In the example shown in b.
Form a ball-shaped fiber mass with a diameter of 20 mm. Therefore, the water treatment medium made of the fiber mass produced as described above is a complex three-dimensional aggregate of fine fibers, so it can be manufactured as appropriate depending on the purpose of use. Although there are many so-called water passage holes, which are spaces for water, the area of the adhesion surface, that is, the mesh surface that attaches or retains suspended matter is larger than that of other filter media, so the filtration efficiency is low. , the filtration effect is greater than that of conventional filter media, and the fiber mass is produced only by air bubbling (air agitation) in water with short fibers with a length of 5 to 50 mm, so it is inexpensive and non-conventional. As a filter medium, it is an extremely excellent water treatment medium. Moreover, the manufacturing method is simple and effective.

[Brief explanation of the drawing]

Figure 1 is a structural model diagram of a fiber mass that is difficult to use as a water treatment medium, Figure 2 is a simplified diagram of a manufacturing apparatus for a fiber mass for water treatment media according to the present invention, and Figures 3A and 3B are in accordance with the present invention. It is a structural model diagram of the fiber mass for water treatment media concerning. 1...Aeration tank, 2...Charging hopper, 3...Short fiber,
4... Air blowing nozzle, 5... Fiber lump outlet.

Claims (1)

[Claims] 1. A water treatment medium comprising a fiber mass in which a plurality of short fibers are entangled with each other. 2. The water treatment medium according to claim 1, wherein the short fibers have a fiber length of 5 to 50 mm. 3 Water treatment consisting of a fiber mass, characterized by blowing gas into the short fiber group dispersed in water, giving vibration to the short fiber group, making it flow, and intertwining a plurality of short fibers into a lump. Method for producing media for use.