JP2516586Y2 - Sewage purification device - Google Patents

Description

[Detailed description of the device]

[0001]

The present invention relates to a sewage purification device,
More specifically, in order to remove nitrogen, phosphorus, etc. contained in domestic wastewater, factory wastewater, livestock house wastewater (hereinafter referred to as “sewage”), which are the main causes of water pollution due to eutrophication in lakes, seas, etc. The present invention relates to a sewage purification device which is arranged in a drainage channel and used to purify sewage.

[0002]

2. Description of the Related Art Conventionally, as a method for removing pollutants such as nitrogen compounds and phosphorus compounds contained in sewage, a sewage treatment system using a sewer, a combined septic tank, a small-scale wastewater treatment facility, etc. Or collect sewage in lakes and reservoirs,
A method is known in which water hyacinth roots suspended in lakes and reservoirs absorb nitrogen and phosphorus.

However, among the above-mentioned purification methods, the method for purifying sewage using facilities is effective in removing BOD from factory wastewater, domestic wastewater, etc., but nitrogen and phosphorus, which are the main factor substances of eutrophication sources. Etc. are not very effective in removing such substances, and operating these facilities consumes a large amount of electric energy, so while purifying sewage, carbon dioxide, nitrogen oxides, and sulfur, which are major substances of global warming, It is also a cause of air pollutants such as oxides.

In the case of a method of removing nitrogen and phosphorus by absorbing roots of floating flora such as water hyacinth,
These flowers gradually grow with absorption of nutrients and the like, and the grown flowers eventually cover the water surface of the lake, so it is necessary to remove them each time they grow. Further, the removed water hyacinth does not die, but gradually corrodes, and causes a bad odor to the surroundings, so there is a problem in its disposal. Further, since the flowers are floated on the surface of water such as lakes and marshes, they are washed away and easily washed away, or concentrated in one place, so that the effect of removing nitrogen and phosphorus decreases.

It is also known that the amount of sewage discharged from homes is not equal throughout the day according to statistics, and varies depending on the time of day.

Therefore, there has been attempted a method of directly purifying sewage from households or the like in the channel.

[0007] As a typical method, a gravel contact oxidation method is used to dispose sewage by laying gravel of different sizes on the bottom of a waterway, and a corrugated plate or a mesh-shaped plastic plate is used as a contact material on the bottom of the waterway. As an example, there is a contact material filling water channel purification method of filling and arranging to treat sewage. The purifying principles of the two are almost the same, and the contaminants in the wastewater are ingested and decomposed by adherent organisms (also referred to as biofilms) formed on the surface of the gravel or the contact material for purification.

[0008]

However, since both the gravel contact oxidation method and the contact material filling channel purification method are installed on the bottom of the channel, it is not possible to sufficiently cope with the change in the level of the sewage flowing in the channel. However, when water is increased due to rainfall, etc., there is a problem that gravel or contact material is buried or damaged by soil, dead leaves, dust, etc. flowing from upstream.

An object of the present invention is to solve the above problems and to provide a sewage purification apparatus capable of removing nitrogen, phosphorus, etc. in sewage extremely easily.

[0010]

A water purification apparatus of the present invention comprises a plate-shaped top plate member having a plurality of holes for holding the roots of flowers, and a drooping connection to the entire periphery of the top plate member. A box-shaped main body comprising a peripheral wall member to be provided, which has a floating property, wherein a part of the peripheral wall member of the box-shaped main body is provided with an inlet for sewage, and the peripheral wall member facing the intake is purified by a flower. It is characterized in that an outlet for purified water is provided. A backflow prevention plate that can be opened and closed may be provided at the drainage inlet of the peripheral wall member of the box-shaped main body. Further, a packing member may be provided over the entire lower edge of the peripheral wall member. Further, a weight for adjusting the levitation of the apparatus body may be detachably provided on the peripheral wall member.

[0011]

When the sewage purifier is placed in the water channel, sewage flows into the box body from the inlet of the peripheral wall member, passes through the box body, and is discharged from the outlet of the peripheral wall member. In this case, the sewage passing through the inside of the box-shaped body contacts the roots of the flowers held in the plurality of holes formed in the top plate member, and the plants absorb and remove nutrients such as nitrogen and phosphorus in the sewage. . In addition, since the box main body is buoyant, the lower edge of the peripheral wall member of the box main body is in contact with the bottom of the water channel when the flow rate of the sewage passing through the water channel is normal. The device itself rises or falls with the increase or decrease.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of the present invention, in which 1 denotes a box body. The box-shaped body 1 is made of rigid styrene foam, such as wood with a length of 100-200 cm, width of 50-100 cm,
A top plate member 2 having a thickness of 2 to 5 cm and a height of 7 to 20 made of wood, plastic, or the like, which is continuously connected to the peripheral edge 3 of the top plate member 2 in a hanging shape.
cm, width 50-200 cm, thickness 1-3 cm, length 100-200
It is composed of a frame-shaped peripheral wall member 4 having a width of 50 cm and a width of 50 to 100 cm, and is floatable to water. In addition, the top plate member 2 is provided with a hole 7 having a diameter of 2 to 5 cm in which the root 6 of the flower 5 can be inserted and held and 5 to 20 cm.
A plurality of holes were drilled at intervals. Then, the hole 7 has a diameter of 2 to 5 cm and a thickness of 2 to 5 cm in which a cross-shaped cut is cut in the central portion.
The urethane foam 8 was fitted and the root 6 of the flower 5 was inserted into the urethane foam 8 to fix the root with the urethane foam 8. Further, an intake port 9 for taking in the sewage FW is provided in a part of the peripheral wall member 4, and the peripheral wall member 4 of the intake port 9 is provided.
A backflow prevention plate 10 that can be freely opened and closed is provided on the inner surface of the. In addition, the peripheral wall member 4 at a position facing the intake 9 of the dirty water FW.
Sewage F by the roots 6 of the flower 5 in the vicinity of the top plate member of
Discharge port 11 for purified water that has absorbed and purified nitrogen and phosphorus in W
Was provided. Further, a urethane foam packing member 13 is provided on the entire lower edge 12 of the peripheral wall member 4.

Then, from the intake 9 of the peripheral wall member 4, sewage FW
Then, the sewage FW is passed through the box main body 1, and the sewage FW is brought into contact with the roots 6 of the flower 5 to obtain the sewage FW.
Absorb nutrients such as nitrogen and phosphorus contained in the root of the flower 5,
Purified and purified water FW is discharged from the outlet 11 to the box type main body 1
It was made to discharge outside of. Further, as shown in FIG. 1, a part of the peripheral wall member 4, for example, a corner portion of the box body 1 is made of transparent plastic as shown in FIG.
A 10 cm bottomed cylindrical weight insertion member 14 is attached, and the weight insertion member 14 can be filled with a granular weight G of 1 cm in diameter having high corrosion resistance to water such as lead or stainless steel. This was used as the floating adjustment weight 15 of the box-shaped main body 1.

Next, a concrete example of purification of sewage using the sewage purification apparatus will be described. Example 1 In this example, the top plate member 2 is made of styrene foam material having a length of 4 cm and holes 7 having a diameter of 4 cm and a spacing of 10 cm, a length of 45 cm, a width of 45 cm, and a thickness of 2 cm. , Width 8 cm, thickness
1 cm of wood was used. The size of the inlet 9 of the peripheral wall member 4 is 5 × 42 cm, the size of the discharge port 11 is 3 × 35 cm, and the weight G of the lead-in member 14 is filled with the lead weight G to form the levitation adjusting weight 15. did. Further, a packing member 13 made of urethane foam having a thickness of 1 cm is fixed to the lower edge 12 of the peripheral wall member 4.

Further, a water channel WC having a width of 48 cm, a depth of 25 cm and a length of 11 m as shown in FIG. 6 was provided on the site of the applicant. Then, as shown in FIG.
The individual pieces were connected to each other in a tandem by chains 16 and placed on the bottom surface in the water channel WC.

[0016] As the sewage flowing into the waterway WC, domestic wastewater discharged from 70 households adjacent to this site was used. In addition, the components of wastewater (household wastewater) used prior to the experiment were measured according to JIS-K-0102, and the results are shown in Table 1 below. In addition, Table 1 also shows the components of the culture solution based on the Japanese garden trial formulation generally used for hydroponics.

[0017]

[Table 1]

As the flower 5 for purifying the sewage, an impatiens used at the time of flowering was used.

Then, as shown in FIG. 7, sewage water FW having a total amount of 0.1 tons is flowed in the water channel WC at a flow rate of 10 liters / hour, and after 12 hours, the total nitrogen content and total phosphorus content in the purified water are removed. It was measured. Then, the removal rates of total nitrogen and total phosphorus were calculated from the measured values of total nitrogen content and total phosphorus content in the water before and after the start of the experiment. The results are shown in Table 2. The removal rate of total nitrogen and total phosphorus was calculated by the following equation.

[0020]

[Equation 1]

In the present invention, total nitrogen means ammonia nitrogen, nitrite nitrogen, nitrate nitrogen and organic nitrogen, and total phosphorus means phosphate phosphorus, hydrolyzable phosphorus and organic phosphorus. Collectively.

Examples 2 to 9 The sewage was treated in the same manner as in Example 1 except that the flowers used for purification of sewage were Periwinkle, Torenia, Klinsou, Salvia, Marigold, Numatranoo, Exacam and Geranium. . Then, the removal rates of total nitrogen and total phosphorus in the water after the experiment were calculated in the same manner as in Example 1 above. The results are shown in Table 2.

[0023]

[Table 2]

As is apparent from Table 2, the apparatus of the present invention has a high removal rate of total nitrogen and total phosphorus in wastewater of 50% or more, and it was confirmed that nitrogen and phosphorus in wastewater can be easily removed.

Although the device of the present invention is installed in the waterway in the above embodiment, the present invention is not limited to this, and the device of the present invention is installed on the shoulder of a general passage generally called a U-shaped groove. It may be installed in a sewer system where there are Further, the device of the present invention may be used for removing nitrogen, phosphorus, etc. contained in factory wastewater, livestock wastewater, etc. flowing through the U-shaped groove.

Further, in the above embodiment, the weight 15 for adjusting the levitation is used.
However, the present invention is not limited to this, and the levitation adjusting weight 15 may be a weight or a hanging weight.

A packing member may be attached to the backflow prevention plate. In this case, the backflow prevention plate is in close contact with the peripheral wall member, and it is possible to reliably prevent the waste water flowing into the box body from flowing out.

Further, the flowers used for purification of sewage may be thinned out at appropriate times after proliferation, and distributed to households for use in sewage treatment. Also, among the flowers, safflower, marigold, calendula, etc. can be used as raw materials for dyes, and mint, lemon herbs, sage, etc. can also be used as raw materials for fragrances, so not only purification of sewage but also resource It is also useful for reuse.

[0029]

[Effects of the Invention] According to the present invention, since the box main body is floatable, even if the water level in the water channel increases or decreases, the box main body moves up or down with the increase or decrease in the water level. Even though the time is low, the flowers do not die because sewage is stored in the box body, and because the box body does not have a bottom, it may collect even if sediment etc. flow into the box body when the water level increases. Moreover, there is an effect that nitrogen and phosphorus in waste water such as domestic wastewater can be easily and surely removed without using electric energy as in the past. When a backflow prevention plate that can be opened and closed is provided inside the main body of the peripheral wall member of the box mold body, when the flow of sewage stops, the intake port is closed and the sewage flowing into the box body is closed. Can be prevented from flowing out of the main body from the intake. Also,
When a packing member is provided on the entire lower edge of the peripheral wall member of the box body, when the water level of the water channel decreases and the box body reaches the bottom of the water channel, the packing member brings the box body into close contact with the bottom surface. Therefore, it is possible to prevent the sewage flowing into the main body from leaking out of the main body. Also, when the weight for adjusting the levitation of the box main body is provided on the peripheral wall member of the box main body, even if the water level of the sewage increases and decreases significantly, the device can be securely turned over without changing the water level. Can be raised or lowered.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the device of the present invention,

FIG. 2 is a perspective view of a part of the apparatus shown in FIG.

FIG. 3 is a front view of the apparatus shown in FIG.

FIG. 4 is a rear view of the apparatus shown in FIG.

FIG. 5 is an explanatory view of one embodiment of a levitation adjusting weight used in the device of the present invention,

FIG. 6 is an explanatory view showing a state where the device of the present invention is installed in a waterway,

FIG. 7 is an explanatory view showing a usage state of the device of the present invention in a waterway.

[Explanation of symbols]

1 box-shaped main body, 2 top plate member, 4 peripheral wall member, 5 flowers, 6 roots,
7 holes, 9 intakes, 10 backflow prevention plate,
11 Drainage port, 12 Lower edge of peripheral wall member, 13
Packing member, 15 Weight for adjusting levitation, FW
sewage.

Claims (4)

(57) [Scope of utility model registration request] 1. A floating box comprising a plate-shaped top plate member having a plurality of holes for holding flower roots, and a peripheral wall member continuously connected to the entire peripheral edge of the top plate member. In the mold main body, an inlet for sewage is provided in a part of the peripheral wall member of the box main body, and an outlet for purified water purified by flowers is provided in the peripheral wall member facing the intake. Characteristic sewage purification device. 2. The sewage purification apparatus according to claim 1, wherein the inlet of the peripheral wall member is provided with an openable / closable backflow prevention plate inside the apparatus main body. 3. The sewage purification device according to claim 1, wherein the peripheral wall member is provided with a packing member on the entire peripheral edge of the lower edge thereof. 4. The sewage purification apparatus according to claim 1, wherein the peripheral wall member is provided with a weight for adjusting the levitation of the box-shaped main body.