JP2868425B2 - Water quality improving material and method for producing water quality improving material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water quality improving material obtained from natural ore and a method for producing the same.

[0002]

2. Description of the Related Art As a substance for suppressing the generation of bacteria and algae in water and improving the quality of water, those using activated carbon, barley stone, porous ceramics and the like are known. These exhibit deodorizing and bacteriostatic effects, prevent the generation of scale, and adsorb and remove pollutants, but have a purifying effect, such as the pH of treated water, oxidation-reduction potential, electrical conductivity,
There is almost no effect of adjusting various conditions such as various ion concentrations in water. In addition, even if such an effect is present, it takes a long time for the effect to manifest, and the effect is not persistent.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a water quality improving material which can adjust the concentration of various ions in water using natural ore, in addition to a purifying action, and a method for producing the same. It is in.

[0004]

This and other objects are attained by the present invention which is defined below as (1) to ( 9 ).

(1) A water quality improving material comprising a washed product of a fired granulated ore containing weathered granite, wherein the water quality improving material contains silicate bacteria.

(2) The water quality improving material according to the above (1), wherein the content of the silicate bacteria is 1 × 10 ⁵ to 1 × 10 ¹² cells / mg.

(3) The water quality improving material according to the above (1) or (2), wherein the water quality improving material is a porous material, and has an average pore diameter of 0.1 to 50 μm.

(4) The water quality improving material according to any one of (1) to (3), wherein the water quality improving material is a porous material, and has a specific surface area of 0.1 to 1.0 m ² / g. Wood.

(5) The water quality improving material according to any one of (1) to (4), wherein the water quality improving material is a porous material, and has a specific surface area of 0.1 to 1.0 m ² / g. Wood.

(6) The method for producing a water quality improving material according to (5), wherein the ore contains vermiculite.

(7) The firing conditions for the firing are 680 to 680.
The method for producing a water quality improving material according to the above (5) or (6), wherein the temperature is 1220 ° C. for 1 to 8 minutes.

(8) The water quality improving material according to any one of the above (5) to (7), wherein the washing is performed so that the mass of the substance after washing with respect to the substance before washing is 26 to 85%. Production method.

(9) calcining a granular raw ore containing weathered granite, the raw ore containing silicate bacteria so that a part of the silicate bacteria survives after firing; A method for producing a water quality improving material, comprising: a step of separating the fired material obtained by the above into a heavy portion and a light portion; and a step of washing the heavy portion of the fired material.

[0014]

[0015]

[0016]

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the water quality improving material of the present invention and a method for producing the same will be described in detail.

[0018] Water quality improving agent of the invention comprises a weathered granite, granular ore and particularly mainly weathered granite and ore,
It is obtained by washing at least a heavy portion of a fired product obtained by firing the raw ore.

As the ore, those containing granular weathered granite , preferably those mainly containing such weathered granite are used. Preferably, the ore further contains a predetermined amount of vermiculite. The content of vermiculite in the ore is not particularly limited, but is preferably about 5 to 50% by weight, more preferably about 10 to 30% by weight. By including such vermiculite, the stability of the effect of the present invention described later is enhanced, and the types of ions to be released are abundant. In addition, it is preferable that silicate bacteria are contained in the raw ore.

The above-described ore is Ru are subjected to calcination. The firing conditions are preferably at a temperature of about 680 to 1220 ° C. for about 1 to 8 minutes, more preferably 800 to 1100 ° C.
About 1.5 to 5 minutes, more preferably 880 to 1
The heating time is set at 050 ° C. for about 2 to 3.5 minutes. Firing temperature 68
If the temperature is less than 0 ° C. or the sintering time is less than 1 minute, the effect such as porosity by sintering becomes insufficient, and the sintering temperature is 12
If the temperature exceeds 20 ° C. or the firing time exceeds 8 minutes, the fired product becomes brittle.

Such calcination is usually performed in air, but the calcination atmosphere may be a gas containing an inert gas such as nitrogen gas or argon gas, or an oxygen-rich gas.

The cooling method after firing is not particularly limited, and may be natural air cooling. The cooling rate is not particularly limited, but is preferably about 1 to 50 ° C / min, and more preferably about 3 to 10 ° C / min. Within such a range, cracks and the like do not occur during cooling, and residual stress is also removed and reduced, so that uniformity and stability of the shape are improved. The average pore diameter and specific surface area of the water quality improving material described later can be appropriately adjusted by setting the above-described firing conditions in firing.

When the raw ore contains silicate bacteria, most of the silicate bacteria are killed by the calcination, but a part of the silicate bacteria survive under the calcination conditions. Silicate bacteria have a strong fertility and, furthermore, since the inside of the water quality improving material of the present invention is an environment rich in moisture, nutrients, etc. for propagation, the number of surviving bacteria immediately after firing is low. However, silicate bacteria having the number of bacteria as described below exist in the finally obtained water quality improving material.

The fired product obtained by the above-described firing includes a heavy portion and a light portion (mainly vermiculite). In the present invention, and time at least heavy fraction of this, to facilities cleaning.

In this case, a method of washing the entire fired product (including a heavy portion and a light portion), separating the fired product into a heavy portion and a light portion, and mainly separating the heavy portion into the heavy portion Any method may be used for washing, but the latter method is preferred from the viewpoint of improving the washing efficiency and the quality of the obtained water quality improving material.

The washing method is not particularly limited, but water washing is preferred. In this case, the type of washing water used is not particularly limited, and may be, for example, any of tap water, industrial water, river water, lake water, groundwater, and the like, and may be one to which an additive is added for any purpose. Also, wash water
The pH is not particularly limited, but is about pH = 5 to 9, especially pH =
It is preferable to be about 6.5 to 7.5.

The degree of cleaning is preferably such that the mass of the substance after cleaning with respect to the substance before cleaning is 26 to 85%, and particularly, the heavy parts in the fired product are mainly cleaned. In the case of applying, it is preferable to carry out such that the mass of the substance after washing with respect to the substance before washing is 40 to 72%. If the mass ratio after washing is too small, washing will be excessive, and the amount of various ions released will decrease when the obtained water quality improving material is used.If the mass ratio after washing is too small, insufficient washing will result. The particles remain and the variation in the particle size of the obtained water quality improving material becomes large, and the removal of clogging or the like in the pores becomes insufficient, and the effective surface area decreases.

After the washing as described above, drying is performed if necessary to obtain the water quality improving material of the present invention. In addition, the drying method is not particularly limited, and in addition to natural drying, drying by blowing cool air or hot air, or heat drying using an oven or the like may be performed.

The water quality improving material of the present invention thus obtained is constituted by a porous material. The average pore diameter in the porous material is not particularly limited, but is preferably 0.
The thickness is about 1 to 50 μm, more preferably about 1 to 5 μm. By setting the average pore diameter in such a range,
Particularly, the excellent substance-adsorbing and capturing action can be continuously exhibited.

The specific surface area of the water quality improving material made of a porous material is not particularly limited, but is preferably 0.1 to 1.0 m ^2.
/ g, more preferably about 0.3 to 0.5 m ² / g. By setting the specific surface area in such a range, it is possible to continuously exhibit particularly excellent adsorption-capturing action and ion releasing action of the substance.

The water quality improving material of the present invention preferably contains silicate bacteria. In this case, the content (number of bacteria) of the silicate bacteria is 1 × 10 ⁵ to 1 × 1.
It is preferably 0 ¹² cells / mg, and 1 × 10 ⁷ to 1 × 10
More preferably, the number is ¹² / mg, from 1 × 10 ⁹ to 1 × 1.
More preferably, it is 0 ¹² / mg. With such a content, the action described later is particularly effectively exerted.

The water quality improving material of the present invention is usually
It is granular. This particle size is not particularly limited,
The average particle size is preferably about 1 to 12 mm, more preferably about 2 to 8 mm.

The granular water quality improving material is further pulverized into a powder, or the granular material or the powder is combined into an arbitrary shape such as a plate, a rod (linear), a tube, or a block. It can also be used after molding.

The water quality improving material of the present invention, when brought into contact with raw water (water to be treated), does not have a substance (eg, sodium hypochlorite in tap water, protein causing scale), etc. As well as appropriately releasing various ions such as calcium ions, potassium ions, magnesium ions, sodium ions, iron ions, silicon ions, sulfate ions, and chloride ions. Furthermore, lower the oxidation-reduction potential of raw water,
And has the effect of increasing electrical conductivity. Such an effect is instantaneous with little temperature dependence of the raw water and is excellent in its sustainability.

Further, since the water quality improving material contains silicate bacteria, the silicate bacteria have an effect of decomposing adsorption, the captured material. Thereby, for example, when the water treatment is stopped, the ability to adsorb and capture substances that do not exist is restored, and the above-described action (performance) can be maintained for a long time. The presence of silicate bacteria also contributes to lowering the redox potential of raw water.

The water quality improving material of the present invention has the advantage that the treated water does not become turbid since fine powder is not clayed as in ordinary ores, and is suitable as, for example, drinking water. .

Further, the water quality improving material of the present invention contains a small amount of α
Since rays and far-infrared rays are emitted, it has the effect of reducing the molecular mass of water. Next, specific examples of the water quality improving material of the present invention will be described.

(Example) An ore produced in Ono-machi, Fukushima Prefecture (so-called "Ono ore") was used as a raw ore. This ore mainly contains weathered granite and contains about 20% by weight of vermiculite. The ore contained silicate bacteria.

Next, the raw ore was calcined in a furnace at a temperature of 1000 ° C. in air for about 3 minutes, and then cooled at a cooling rate of 4 ° C.
/ Min air cooling. While stirring the obtained fired product, a high-speed air stream was blown against the fired product to blow off the light portion, and the remaining heavy portion was recovered.

Next, a heavy portion of the recovered fired product of 20 kg
Was washed with tap water (pH = 7.1). The weight of the substance (washed material) after washing was 10.7 kg. The washed material was air-dried to obtain a granular water quality improving material having an average particle size of about 4.5 mm. The average pore diameter of this water quality improving material is about 2.5
μm, specific surface area was about 0.4 m ² / g. Further, when the number of silicate bacteria contained in this water quality improving material (when stable) was analyzed, it was about 5 × 10 ¹⁰ cells / mg.

[Experiment 1] 7.5 kg of the water quality improving material 1 of the above embodiment was packed in a column 2 having an inlet 3 and an outlet 4 of water shown in FIG. (Raw water) was supplied, brought into contact with the water quality improving material 1 in the column 2, and then discharged from the outlet 4. The supply amount of tap water was 5 liters per minute.

At 30 minutes after the start of the flow through the column, tap water (raw water) before passing through the column and water (treated water) flowing out of the column were sampled, and each was sampled by Kyoritsu Riken. Water analysis was performed using an analyzer. The results are shown in Table 1 below.

[0043]

[Table 1]

As shown in Table 1 above, it was confirmed that various mineral components (ions) were eluted from the water quality improving materials of the examples and were added to the treated water.

[Experiment 2] About 7.
5 kg is packed in the same column as above, and tap water (raw water) is supplied to this column at 1 liter per minute for 8 hours a day.
This was repeated daily.

2 days, 30 days, 6 days from the start of water flow to the column
At 0, 90 and 120 days, water (treated water) flowing out of the column was sampled, and its redox potential, conductivity and pH value were measured.
The results are shown in Table 2 below.

[0047]

[Table 2]

As shown in Table 2, according to the water quality improving material of the present invention, the oxidation-reduction potential of raw water is lowered, and the conductivity and pH
It can be seen that the water quality is improved so that the water content increases, and that the effect is also excellent in persistence.

[Experiment 3] In Experiment 2, an experiment for investigating in more detail the cause of the sustained effect of water quality improvement was conducted.

Tap water (raw water) was placed in a small column 2 having the same structure and filled with 2.0 kg of the water quality improving material 1 of the above embodiment.
After passing through a predetermined amount of water (first time) and stopping the water supply for 33 days, the water supply was repeatedly restarted and stopped under the conditions shown in Table 3 in the same manner.

For each predetermined amount of water flow, tap water (raw water) before passing through the column and water (treated water) flowing out of the column were sampled. Concentration of sodium chlorite) was measured. The results are shown in Table 3 below.

[0052]

[Table 3]

As shown in Table 3, in the water quality improving material of the present invention, in each of the first to fourth water passages, the amount of sodium hypochlorite was increased as the accumulated water flow increased. Adsorption and capture capacity are reduced, but water supply is stopped for a predetermined number of days and then water supply is resumed (at the start of the second, third, and fourth water supply)
It was confirmed that the adsorption and capture ability of sodium hypochlorite was restored. This is because during the suspension of water flow, silicate bacteria present in the water quality improvement material decompose the adsorbed and captured substances such as sodium hypochlorite, and the decomposed products are released into the treated water. Is estimated.

From the above, the water quality improving material of the present invention can achieve the water quality improving effect described above for a long period of time. The use of the water quality improving material of the present invention is not particularly limited,
For example, it can be used for improving water quality of tap water (drinking water), industrial water, and agricultural water.
They can be installed inside bathtubs, ponds, water tanks, fish farms, septic tanks, etc., or in water supply pipes or water circulation systems. In this case, the water quality improving material can be laid (sedimented) on the bottom of the tank as it is, or can be installed in a desired container or packaging material (bag having water permeability).

[0055]

As described above, the water quality improving material according to the present invention purifies water by adsorbing and capturing substances that are not present in the water, and furthermore, pH, redox potential, electric conductivity, and various ion concentrations of water. And other conditions can be adjusted. Moreover,
The speed of onset of such an effect is high, and the durability is excellent.

In particular, the average pore size of the water quality improving material is 0.1 to
50 μm or a specific surface area of 0.1 to 1.0 m ² / g
In the case of, the above effect becomes more remarkable. In addition, when the ore contains vermiculite, the firing conditions are set to a temperature of 680.
In the case of 1 to 8 minutes at １２1220 ° C., when the washing is performed so that the mass of the substance after washing with respect to the substance before washing is 26 to 85%, the properties of the water quality improving material are uniformed, The effect is more remarkably or stably obtained.

Further, the water quality improving material contains silicate bacteria, and particularly, the content (the number of bacteria) is 1 × 10 ⁵
In the case of ^１1 × 10 ¹² particles / mg, since it has a restoring force such as a capability of adsorbing and capturing a substance that does not exist in itself, an excellent water quality improvement effect can be obtained over a long period of time.

Further, according to the method for producing a water quality improving material of the present invention, a water quality improving material exhibiting the above-mentioned excellent effects can be produced with a stable quality from natural ore. Since it is simple and the manufacturing cost is low, it is suitable for mass production.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an apparatus for testing a water quality improving material of the present invention.

[Explanation of symbols]

 1 Water quality improving material 2 Column 3 Inlet 4 Outlet

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ identification symbol FI C02F 1/68 540 C02F 1/68 540J 3/34 ZAB 3/34 ZABZ (58) Fields surveyed (Int.Cl. ⁶ , DB Name) C02F 1/00 C02F 1/28 C02F 1/68 520 C02F 1/68 540 C02F 3/34

Claims (9)

(57) [Claims] 1. A water quality material composed <br/> cleaning of burned material of granular ore containing weathered granite, water quality improvement material, characterized in that it contains silicates bacteria. 2. The silicate bacterium content of 1
The water quality improving material according to claim 1, wherein the content is from × 10 ⁵ to 1 × 10 ¹² / mg. 3. The water quality improving material according to claim 1, wherein the water quality improving material is a porous material, and has an average pore diameter of 0.1 to 50 μm. 4. The water quality improving material according to claim 1, wherein the water quality improving material is a porous material, and has a specific surface area of 0.1 to 1.0 m ² / g. 5. A granular raw ore containing weathered granite,
Characterized in that it has a ore containing silicate bacteria, comprising the steps of a portion of the silicate bacteria fired to survive after firing, and a step of subjecting the washing against the fired product obtained by the calcination Method for producing a water quality improving material. 6. The method for producing a water quality improving material according to claim 5, wherein the ore contains vermiculite. 7. The firing conditions for the firing are 680 to 122.
The method for producing a water quality improving material according to claim 5, wherein the temperature is 0 ° C. for 1 to 8 minutes. 8. The method for producing a water quality improving material according to claim 5, wherein the cleaning is performed so that the mass of the substance after cleaning is 26 to 85% of the substance before cleaning. 9. A granular raw ore containing weathered granite,
Baking a raw ore containing silicate bacteria so that a part of the silicate bacteria survives after baking; and separating the calcined product obtained by the baking into a heavy portion and a light portion. And a step of washing a heavy portion of the fired product.