JPH11244881A - Filter medium capable of being positioned at optional depth of water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter medium capable of being directly thrown into the water, selectively positioned at the depth where there are many colonies of microorganisms effective in purifying the water of rivers, lakes, marshes, ponds, etc., and highly stable against the water stream. SOLUTION: A filter medium 7 formed by packing a bisque 2' used as a member having >=1 sp.gr. and a float 3 in a basket-shaped container 1 and a filter medium 6 prepared by packing the bisque in another basket-shaped container are connected through a rope-shaped connecting member 5, and further the filter mediums are connected to a weight 4. The filter medium thus obtained has efficient purifying capacity and high stability against the water stream.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applicable to water purification of rivers, lakes, marshes, ponds, etc., and can be selectively positioned at a water depth where there are many microorganisms effective for water purification. In addition, the present invention relates to a filter medium having good stability with respect to flow.

[0002]

2. Description of the Related Art Conventionally, most of filter media are incorporated into purification facilities and used, and as shown in Utility Model Registration No. 3016757, there are other examples of filter media that can be directly introduced into rivers, lakes, marshes, ponds, and the like. Is about the case of charcoal use.These are heavy and will sink when thrown in, and only colonize the microorganisms near the bottom mud surface. It is unsatisfactory from the direction of higher efficiency.

[0003]

The conventional method for purifying water from rivers, lakes, marshes, ponds, and the like involves making a purification facility, drawing water into the facility, treating and discharging the water, and the scale of the facility is limited. There have been few reports of practical applications due to the fact that the equipment costs are huge, the landscape is impaired, etc., and the emergence of a solution to these problems is expected.
While there are still few examples of the purification method using direct filter media such as filter media using unglazed pottery or charcoal proposed in Utility Model Registration No. 3016757, according to recent research, self-cleaning of rivers and lakes has been reported. Microorganisms involved in the internal denitrification of the action have been found to be abundant on the bottom mud surface and suspended matter, and dephosphorus bacteria are also attracting attention.

According to the present invention, for the purpose of water purification of rivers, lakes, marshes, ponds, and the like, the position can be selectively set to a water depth which can be directly introduced and has a large number of microorganisms effective for water purification, and the flow can be controlled. The purpose is to provide a filter medium having good stability.

[0005]

Means for Solving the Problems To achieve the above object, the filter medium of the present invention will be described with reference to the drawings.
In a basket-like container (1), an unglazed pottery pipe (2) or a hollow, perforated sphere (2 ') of unglazed pottery; and
The filter medium (7) filled with the float (3) is connected to the filter medium (6) filled with unglazed pottery in another basket-shaped container and the weight (4) by a rope-shaped connecting member (5). Thus, it is possible to selectively set a position at a water depth where there are many microorganisms without being swept by the flow velocity.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The disadvantage of sinking of unglazed pottery, which is very excellent as a home for microorganisms, is overcome by the coexistence of a float, and by connecting with a weight, it is possible to selectively set the position at a water depth with many microorganisms. In addition, by ensuring the stability with respect to the flow velocity, efficient water quality purification becomes possible.

[0007]

EXAMPLE The results of water purification using the filter medium of the present invention are shown.

Table 1 shows the stability against flow.

The results are shown in Table 2.

[0008]

[Table 1]

After storing in a water tank with a submersible pump from the irrigation canal, the tank is divided into two tanks and a flow of about 10 l / min is made in each tank by a small pump of about 20 l / min. The water quality analysis was carried out one month after charging the filter medium, which was an empirical period in which it was judged that the microorganisms had sufficiently settled since the water quality analysis value became stable as the microorganisms settled in the tank. As a result, Sample I was a filter medium (with a dry weight of about 2
kg), and is in a state of diving in the bottom mud about 5 cm (the microorganisms live most on the bottom mud surface), and the water purification capacity is COD13.
4 ppm of raw water is as excellent as 2.0 ppm. Sample II, a filter medium (dry weight: about 2 kg) filled with unbaked baked goods and a float in a basket-like container, in a state where the top of the basket-like container floats very slightly from the water surface (microorganisms are suspended near the water surface). Live the second most in an object.)
The water purification ability is extremely superior to 2.2 ppm of COD of Sample I, not a significant difference of 2.2 ppm.

[0010]

[Table 2]

In the vicinity of a channel wall of an irrigation channel having a channel width of about 10 m (flow rate: about 14 m / min), a basket-shaped container filled with unglazed pottery and a float (dry weight: about 2 kg) and another basket-shaped container A filter medium (dry weight: about 3 k8) filled with unglazed pottery was charged in a state of being connected by a rope-shaped connecting member, and the stability to flow was observed. Also, in the vicinity of the center of the water channel (flow rate about 19 m / min), a basket-shaped container filled with unglazed pottery and a float (dry weight: about 2 kg)
And a filter medium (dry weight of about 2 k8) filled with unbaked pottery in another basket-shaped container, connected by a rope-shaped connecting member, and further charged with the weight (6 kg) connected to the filter medium, thereby stabilizing the flow. Was observed. The judging period is one month in each case, and the judging method is to measure the distance from the balustrade of the bridge to the yarn by lowering the yarn whose weight is suspended from the center of the float-filled filter medium floating near the water surface. As a result, both remained stable without being washed away.

[0012]

As shown in the examples, when the basket-like container is filled with a filter medium filled with unglazed pottery, the filter medium is located near the bottom mud.
The flow velocity is slow, the contact time between the water and the filter medium is long, and the environment is that there is bottom mud around the filter medium (microorganisms are the most common). When the filter medium filled with is near the water surface, the flow velocity is high, the contact time between the water and the filter medium is short, and the environment in which suspended matter flows around the filter medium (the number of microorganisms is next to that of the bottom mud surface). ), And despite these differences, the results of water quality analysis are almost the same. from these things,
When the water is circulating, the location of the filter media for the purpose of more effective water purification may be anywhere near the bottom mud or near the water surface, but it may flow off like a river. In the case where the water depth is deep, the object can be achieved by throwing into both the vicinity of the bottom mud and the vicinity of the surface of the water rather than throwing only from the bottom to the vicinity of the bottom mud. Next, regarding the stability against the flow velocity, the flow velocity of rivers, lakes, marshes, ponds, and the like that require water purification hardly exceeds 25 m / min. Therefore, when the flow velocity is 19 m / min, 1 kg with a 6 kg weight is used. From the result that the stability is good over the months, it is possible to sufficiently cope by changing the weight of the connected weight.

[Brief description of the drawings]

FIG. 1 is an overall view of a filter medium of the present invention.

FIG. 2 is a three-dimensional view of the filling of a basket-like container.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Basket-shaped container 2, 2 'Unglazed porcelain 3 Float 4 Weight 5 Rope connection member 6 Filter medium which filled basket-shaped unglazed porcelain 7 Filter medium which filled basket-shaped unglazed porcelain and float

Claims (3)

[Claims] A filter medium (7) in which a basket-shaped container (1) is filled with a member having a specific gravity of 1 or more and a float (3), and a filter medium in which another cage-shaped container is filled with a member having a specific gravity of 1 or more ( 6)
Are connected by a rope-shaped connecting member (5) whose connection length is adjusted, and can be positioned at an arbitrary water depth. 2. A filter medium that can be positioned at an arbitrary water depth according to claim 1, wherein unglazed pottery (2), (2 ′) is employed as the member having a specific gravity of 1 or more. 3. A filter medium (6) in which said basket-shaped container is filled with a member having a specific gravity of 1 or more and a weight (4) are connected by a rope-shaped connecting member (5) so as not to flow at a flow rate. 1
Filter media that can be positioned at any water depth.