JP3137327B2 - Water purification block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel water purification block for purifying water by installing it in or near water, such as a pond, lake, or river.

[0002]

2. Description of the Related Art Conventionally, it is known that porous concrete has a certain degree of water purification action, and there are those in which porous concrete is formed into a spherical shape and those in which a seawall block is formed of porous concrete.

[0003]

Porous concrete has a water purification effect to a certain extent, but it is not so great, and no sufficient water purification effect can be expected.

[0004]

SUMMARY OF THE INVENTION The present invention provides a water purification block comprising: a body made of porous concrete; and a phosphorus adsorbent mass obtained by firing a mixture of volcanic ash and ferrous sulfate. Further, the water purification block is characterized by being made of porous concrete containing a phosphorus adsorbent obtained by firing a mixture of volcanic ash and ferrous sulfate in an aggregate.

[0005] Porous concrete is a porous concrete produced by blending an extremely large ratio of coarse aggregate to fine aggregate as compared with ordinary concrete. The phosphorus adsorbent is obtained by mixing volcanic ash and ferrous sulfate and firing the mixture. This is an extremely excellent phosphorus adsorbent having a large phosphorus adsorption capacity, and a large water purification effect can be obtained by using it together with porous concrete. The appropriate ratio of the phosphorus adsorbent is usually about 10% (volume percentage) with respect to the entire block, but it is needless to say that the ratio should be increased or decreased depending on the type of the phosphorus adsorbent and the quality of the polluted water.

[0006] The size and shape of the block are not limited, and the size and shape that are easy to handle can be freely selected. For example, it can be installed underwater or on the waterside as a bed block for riverbed, a block for revetment, or a reef block.

[0007]

The cause of water pollution is mainly organic matter, nitrogen compounds and dissolved phosphorus. The present inventors have studied the water purification action of porous concrete. As a result of the action of microorganisms inhabiting the myriad of pores of the porous concrete, the organic matter in the polluted water becomes carbon dioxide and water, and the nitrogen compound becomes nitrogen. Each is actively decomposed and removed into gas,
It has been found that the effect of removing dissolved phosphorus by only porous concrete is small.

FIG. 1 is a graph showing the change in the phosphorus concentration in water when the porous concrete is used alone (2) and when the porous concrete and the phosphorus adsorbent are used together (1). 23 liters of tap water are placed in each of the two containers, and KH2PO4 is added to a concentration of 1 mg P / l, and one side contains eight 10 cm square porous concrete, and the other side contains eight 10 cm square porous concrete and phosphorus. About 1 liter of the adsorbent was charged, and the measurement was performed by sampling over time. As is clear from this, the effect of removing phosphoric acid phosphorus by the porous concrete alone is small, but the effect is dramatically increased by using the porous concrete together with the phosphorus adsorbent.

FIG. 2 is a graph showing the change in the total phosphorus concentration in water when the phosphorus adsorbent is used alone in polluted water existing in nature (5) and when the porous concrete and the phosphorus adsorbent are used together (4). is there. 23 liters of naturally polluted pond water are placed in two containers, one containing 1 liter of phosphorus adsorbent and the other containing both 10 cm square porous concrete and about 1 liter of phosphorus adsorbent. , Was sampled with time and measured. As can be seen from this graph, the phosphorus adsorbent has a small effect of adsorbing phosphorus in polluted water in nature. This is considered to be because most of the phosphorus in the polluted water in the natural world is present in organisms such as plankton, so that phosphorus in such organisms cannot be directly adsorbed. However, when used together with porous concrete, microorganisms adhering to the surface of the porous concrete release phosphorus into the water from living organisms in the water, and the phosphorus adsorbent adsorbs this, synergistically increasing the phosphorus adsorption effect It is estimated that In addition, in FIG. 2, (6) shows the change of the total phosphorus concentration in the water when neither the porous concrete nor the phosphorus adsorbent is measured, which is measured simultaneously for reference.

Further, a porous concrete block (about 1% of the amount of water) is placed in the water of a pond contaminated with plankton or algae.
5%) and a phosphorus adsorbent mass (about 10% of the volume of the porous concrete block) were installed, and changes in water quality were examined. The phosphorus adsorbent mass used was a mixture of volcanic ash and ferrous sulfate and calcined. The water quality is initially 20 organic
-30 ppm (carbon content), total phosphorus 0.085 ppm,
Phosphoric acid phosphorus is 0.01 ppm, and visibility is 10 to 1
5 cm. After 30 days, about 10 ppm total organics,
Total phosphorus is 0.038 ppm, phosphoric acid phosphorus is not detected,
The visibility was improved to more than 50 cm. By this experiment,
By using porous concrete and phosphorus adsorbent together,
It has been proved that the synergistic effect achieves a remarkable water purification effect.

If the phosphorus adsorbent mass is made detachable with respect to the main body, when the phosphorus adsorbing action is reduced due to long-term use,
It is possible to replace the phosphorus adsorbent mass and maintain its effect.

[0012]

Embodiment 1 FIG. 3 is a block diagram (1) of an embodiment of the present invention.
It is a perspective view of (0). This block is for laying on the riverbed or the bottom of a pond. A phosphorus adsorbent mass (12) is mounted on a porous concrete body (11) and integrated therewith. This mounting is done in the concave part (13) in the center of the main body.
This is performed by fitting the phosphorus adsorbent mass (12) into the mass, and the phosphorus adsorbent mass is detachable and can be replaced as needed. In this embodiment, the phosphorus adsorbent mass is
It uses a mixture of volcanic ash and ferrous sulfate and fired.

As a method for mounting the phosphorus adsorbent mass on the main body, various known methods can be used in addition to the method of this embodiment. For example, there are a method of driving a phosphorus adsorbent mass into concrete when manufacturing the main body, and a method of mounting the main body using metal fittings such as bolts.

[0014]

Embodiment 2 FIG. 4 is a block diagram showing an embodiment (2) of the present invention.
It is a perspective view of (0). This block is to be installed underwater or near the water, such as a pond. The main body (21) made of porous concrete is made of a natural stone, and a phosphorus adsorbent mass (22) is detachably fitted in a concave portion (23) on the bottom surface.

[0015]

Embodiment 3 FIG. 5 is a block diagram showing an embodiment (3) of the present invention.
It is a schematic side view of (0). The block (30) is a revetment block mainly laid on the slope at the water's edge, and has a core (32) in the center of a number of bale-shaped porous concrete bodies (31). The space between the main bodies is freely bendable.

In manufacturing the block (30), a phosphorus adsorbent mass obtained by mixing volcanic ash and ferrous sulfate and firing is formed into a crushed stone shape having an average particle size of about 15 mm, and 15%
(Volume). In this way, the porous concrete block in which the phosphorus adsorbent is mixed into the aggregate is used as a seawall block, a riverbed spread block, a fish reef block, etc., so that the microorganisms living in the porous concrete and the phosphorus adsorbent have a synergistic action. Demonstrate excellent water purification ability. Phosphorus adsorbents can also be incorporated in fine aggregates and in both coarse and fine aggregates.

[0017]

The water purifying block of the present invention exerts an excellent purifying action on all of organic matter, nitrogen compounds and dissolved phosphorus in polluted water by synergistic action of microorganisms inhabiting the porous concrete and a phosphorus adsorbent, Water purification of lakes and rivers can be realized relatively easily at low cost.

[Brief description of the drawings]

FIG. 1 is a graph showing changes in the concentration of phosphoric acid phosphorus in water when porous concrete is used alone or when porous concrete and a phosphorus adsorbent are used in combination.

FIG. 2 is a graph showing a change in the concentration of total phosphorus in water when a phosphorus adsorbent is used alone in polluted water existing in nature and when a porous concrete and a phosphorus adsorbent are used in combination.

FIG. 3 is a perspective view of a block (10) of the embodiment.

FIG. 4 is a perspective view of a block (20) of the embodiment.

FIG. 5 is a perspective view of a block (30) of the embodiment.

[Explanation of symbols]

1 Change in phosphoric acid phosphorus concentration in water when using porous concrete and phosphorus adsorbent 2 Change in phosphoric acid phosphorus concentration in water when using porous concrete alone 3 When neither porous concrete nor phosphorus adsorbent is included Changes in Phosphorus Phosphorus Concentration in Water of Water 4 Changes in Total Phosphorus Concentration in Water when Porous Concrete and Phosphorus Adsorbent are Used 5 Changes in Total Phosphorus Concentration in Water when Phosphorus Adsorbent is Used Alone 6 Porous Concrete and Phosphorus Change in total phosphorus concentration in water when none of the agent is included 10 block 11 main body 12 phosphorus adsorbent mass 13 concave portion 20 block 21 main body 22 phosphorus adsorbent mass 23 concave portion 30 block 31 main body 32 chain

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masayuki Hashimoto 1-6-1, Otemachi, Chiyoda-ku, Tokyo Inside Nippon Cement Co., Ltd. (72) Inventor Kazuto Yoshimori 1-2-23, Kiyosumi, Koto-ku, Tokyo Japan Cement Co., Ltd. Central Research Laboratory (58) Field surveyed (Int. Cl. ⁷ , DB name) C02F 1/28 B01D 15/00 E02B 3/14

Claims (5)

(57) [Claims] 1. A water purification block wherein a porous adsorbent mass obtained by firing a mixture of volcanic ash and ferrous sulfate is attached to and integrated with a porous concrete body. 2. The water purification block according to claim 1, wherein the phosphorus adsorbent mass is detachable from the main body. 3. The water purification block according to claim 1, wherein the proportion of the phosphorus adsorbent mass is approximately 10% by volume with respect to the main body. 4. A water purification block characterized in that the aggregate is made of porous concrete containing a phosphorus adsorbent obtained by firing a mixture of volcanic ash and ferrous sulfate. 5. The water quality according to claim 4, wherein the aggregate comprising a mass of phosphorus adsorbent having an average particle size of about 15 mm is contained as a part of the coarse aggregate by about 15% (volume). Purification block