JP3482619B2 - Sludge treatment facility using reed and sludge treatment method - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to a f mud processing to utilize the water flying properties contaminated water purification units that were taking advantage of the water purification ability of the reed which can be used the natural purification function (also referred to as "reeds (reeds)") Facilities and sludge treatment method.

[0002]

2. Description of the Related Art With the development of industry and modernization of life, pollution of rivers and the like is spreading due to factory drainage, urban drainage, etc., and countermeasures against it are becoming a problem. Pollution in swamps, wetlands and closed water areas is also a problem. Since many animals and plants such as fish live in these rivers, lakes and marshes and sea areas, water pollution and deterioration of water quality in these rivers, lakes and marshes and sea areas will seriously destroy the ecosystem. In this way, the purification of water such as polluted rivers, lakes and marshes and closed sea areas, and purification of domestic wastewater are becoming more important in terms of preventing environmental destruction. Although wastewater purification facilities have been installed to purify water, environmental conservation of rivers, lakes and marshes should be carried out by using facilities that can purify in a more natural form if possible. It is considered preferable. Furthermore, it has recently been considered that it is preferable to utilize the natural purifying action as much as possible in purifying water such as rivers, lakes and marine areas, and it does not damage the natural landscape and is relatively There is a need for an inexpensive method. From such a viewpoint, it is considered promising to use waterside plants such as water hyacinth and reed to purify polluted river water and domestic wastewater. However, in the method of floating water hyacinth and absorbing the nutrient salts by the plant and treating the water, the water hyacinth floats in the water, but its root is not so long and only the surface water can be purified, and even if water hyacinth is installed with difficulty There are many problems such as the need for maintenance every year because it cannot overwinter.

[0003] On the other hand, the reed plant, Reed, has roots that extend longer and deeper in water than that of Water Hyacinth, and are densely populated. Therefore, if the reed can be used effectively, it is expected that the purification efficiency can be further improved. There is. In addition, because reed is salt-resistant, it can be applied to brackish waters such as estuaries. Conventionally, water purification using reeds involves planting reeds in the soil or gravel and flowing contaminated water to the surface layer (Fig. 1) or permeation flow system (Fig. 2) that permeates soil 5.
It was intended to purify the polluted water.
In these methods, nutrients (nitrogen,
In addition to absorbing phosphorus, polluted water in the former is not
In the process of contact with the stem of the reed 2, the water quality is purified by precipitation and decomposition by biofilm. And in the latter,
It is considered that the wastewater is purified by decomposition by microorganisms existing on the root surface of Reed 2 and physicochemical processes such as filtration and adsorption by soils 4 and 5. In the figure, 1 is polluted water, 2 is reed, 3 is treated water, 4 is soil, and 5 is soil or gravel. However, the surface flow method is such that the depth of water from the vegetation surface of Reed 2 is 10 cm or less (45 cm or less in the cold season) and it cannot be so deep, so between the sewage that contacts the stem of Reed 2 that affects the purification capacity. There is a problem that the area of the formed biofilm is small and the treatment efficiency is poor. Moreover, in this method, since the surface of the stem of the reed is mainly used, there is a problem that the efficiency is extremely inferior as compared with the case where a much denser root group is used than the stem. Further, in the infiltration flow method, since there is clogging by soils 4 and 5, it is possible to use a root group that is denser than the stem, but there is a problem that the amount of treated water cannot be increased. Due to such a problem, water purification using Reed 2 has a small amount of treated water per unit area and requires a huge amount of land, which has been a bottleneck in widespread use.

As a similar technique, there is a river purification technique by an inter-gravel catalytic oxidation method, but there are also problems that clogging is caused by sludge trapped between the gravel and nutrient salts return from the sludge. Further, there is a problem that it is necessary to fill a contact material for treating water. In addition, it requires means for aerating to supply oxygen and maintain aerobic. Another problem is that in eutrophied polluted water areas, such as lakes and closed sea areas, sludge containing a large amount of nutrient salts is deposited at the bottom, which elutes and causes abnormal generation of algae. There are also problems. Once a large amount of algae is generated, the ecosystem will be destroyed, such as fish and shellfish dying in large numbers due to lack of oxygen, etc., and the malodor caused by sludge is intolerable. In order to solve problems caused by sludge deposits, water quality improvement measures are generally taken by dredging and removing the sludge. In other words, the dredging of sludge is carried out in various places as a basic measure for water purification. However, the dredged sludge has a problem of the place to dispose of it and the secondary pollution countermeasures caused by it, and it is the current situation that the countermeasures are difficult. As mentioned above, it is considered to use the reed of the extracted plant as a measure for such purification of the polluted water, but only the satisfactory results have been obtained by the conventional methods. In addition, the method of carrying out the transplantation of Yoshi by using a reed stalk to take advantage of the reed, there is a need to come collected from wetlands that are really growing of existing Yoshi for must obtain the stems of reeds in large quantities However, it took a lot of labor to collect the stems of the reeds from the wetlands where the reeds were growing, because it was a wetland. Furthermore, the survival rate of the stems of the reeds thus obtained is very poor, and there is also the problem that the existing ecosystem of reeds is destroyed.

[0005]

Means for Solving the Problems As a result of intensive studies to find a way to effectively utilize the characteristics of these reeds, the present inventors have used a nursery suitable for easily growing reeds industrially from seeds. Moreover, if the nursery and the water-floating structure are used in combination, the roots suspended from the floating reed community can be treated easily and reliably at low cost without destroying the existing reed ecosystem. The inventors of the present invention have found that they can be provided as a contact material for automobiles and arrived at the present invention. Thus, the present invention utilizes a reed adapted to fix the contaminated water by fixing the nursery bed on which the reed grows to the water floating structure so that the soil bottom of the reed for cultivation can be submerged. The present invention provides a contaminated water purification unit, and further provides a contaminated water purification device in which a contaminated water purification unit that uses the water-floating reed is floatably arranged in a contaminated water purification channel and is capable of flowing water. Then , according to the present invention, a contaminated water purification unit that uses the water-floating reed is installed in the sludge accumulation section dredged from the sludge-deposited polluted water area, and the sled stabilizes sludge and purifies the contaminated water. A sludge treatment facility utilizing reeds is provided which is characterized by the aim. In particular, in the sludge-deposited polluted water area, a section that forms a closed system that surrounds the surrounding part of the water area is installed, and then dredged sludge is deposited in the section, and then the nursery where the reed grows is cultivated in the nursery. Install a contaminated water purification unit that uses reeds that are fixed to the water-floating structure so that the soil bottom part can be flooded and that is suitable for purification action, and install the reed roots sufficiently After the polluted water purification unit that uses the reed and the accumulated sludge are integrated, the water to be purified is allowed to pass through, and the reed is used to rehydrate the sludge. A sludge treatment method for stabilizing and treating polluted water is provided.

That is, the present invention is summarized and described as follows. (1) Utilizing a reed constructed by fixing a nursery bed of a reed to a water floating structure so that at least the soil bottom for cultivation in the nursery can be submerged in the sludge sedimentation section dredged from the sludge sedimented polluted water area. A sludge treatment facility that uses reeds, which is equipped with a contaminated water purification unit to stabilize sludge and purify contaminated water. (2) In the sludge-deposited polluted water area, a section that surrounds a certain part of the water area to form a closed system is installed, and dredged sludge is accumulated in the section, and the reed nursery at least culture soil bottom contaminated water purification unit utilizing reed constructed by allowed fixed water floating structure body so as to be capable flooded, with each other and installed in the compartment, sludge roots reed is sufficiently deposited It can be grown until it grows inward, and after the contaminated water purification unit using the reed and the sludge are integrated, the water to be purified can pass through. Sludge processing facility that uses reeds. (3) seedbed for growth of surplus is, utilize the reed according to the above are those filled with culture soil which was composed mainly of peat moss in the synthetic resin mesh container (1) or (2) sludge Processing facility.
(4) A sludge treatment facility using the reed according to (1) or (2), wherein the water-floating structure is made of a foamed synthetic resin.

(5) In the sludge-deposited polluted water area, a section that surrounds a certain part of the water area to form a closed system is installed, and after the dredged sludge is deposited in the section, the reed nursery is contaminated water purification unit in which at least culture soil bottom of該苗bed utilizes a reed which is constructed allowed fixed water floating structure body so as to be capable flooded placed in the compartment, the roots are sufficiently deposited sludge reed A sludge treatment method using reeds, characterized in that the contaminated water purification unit that utilizes the reeds and the accumulated sludge are integrated, and then the purified water is allowed to pass therethrough. (6) A part of the water area where the sludge is accumulated is surrounded by a wooden fence, and a floating water impermeable sheet with holes for discharging the excess water of the dredged sludge is installed inside the enclosure, and around the excess water discharge port. Is installed a silt protector, in the section forming a closed system surrounding the perimeter of a certain part of the water area provided in the sludge sediment polluted water area, dredging the sludge in the water area where the sludge is deposited, filled to a height of該柵, after dredging sludge is completed, the nursery reed, contaminated water at least culture soil bottom in該苗bed was constructed allowed fixed water floating structure body so as to be capable flooding Floating the purification unit on the inside of the floating impermeable sheet, the floating reed grows, the roots of the reed extend from the water area to the inside of the sludge, and when the floating reed community and sled are integrated, the floating impermeable sheet floats. Remove the child, sink the seat Or removed, sludge processing method utilizing a reed of the (5) according to the replacement state capable of water to and from the external water.

The nursery bed used in the present invention is a nursery bed suitable for growing reeds from seeds, for example, a unglazed container or a container made of synthetic resin and filled with cultivation soil containing peat moss as a main component. And the like, which are suitable for growing commercially available plants from seeds. The container is not particularly limited as long as it can hold culture soil, etc.
It is preferable that water permeability and the like can be sufficiently ensured, and it is preferable that the roots and the like are not hindered from growing along with the growth of reeds. Examples thereof include reticulated ones and porous ones.
The container can also be a naturally reducible material.
As the synthetic resin used in the synthetic resin mesh container,
Examples thereof include vinyl chloride resin, polyethylene resin, polypropylene resin and polystyrene resin. As the culture soil used for the nursery, it can be used by selecting from those commercially available, mainly using peat moss, vermiculite, mulch, perlite, river sand, water moss, etc., if necessary, by using them alone Or those which are appropriately mixed with each other, and those which are mixed with nutrients necessary for germination and growth such as nitrogen, phosphorus and potash. The shape of the container may be generally cylindrical or box-shaped, and examples thereof include those in which the circumference of the cylinder or the like is prevented from losing its shape by a net made of synthetic resin. As such a nursery bed, one selected from commercially available ones can be used, and examples include those sold under the product name such as Gee-Fee 7. A typical nursery has about 5
Cylinders with a diameter of cm are mainly used for peat moss. As a typical nursery bed used in the present invention, the one shown by reference numeral 8 in a perspective view in FIG. 3 can be mentioned.

In the present invention, seeds are collected from reeds that are naturally vegetated, and the seeds 7 are then placed in a nursery 8 (enclosed by a net made of synthetic resin so as not to lose its shape) shown in FIG. Reed seedlings that have been planted and, if necessary, promoted germination and growth, are grown in a greenhouse, for example, while keeping them warm, and grown until they can withstand transplanting sufficiently. For example, a reed seedling having a height of about 5 cm to about 35 cm or more can be obtained. According to the present invention, the thus-obtained nursery bed on which the reed grows is fixed to the water-floating structure so that the soil bottom for cultivation in the nursery bed can be submerged. As the water-floating structure, one having a buoyancy force sufficient to float a nursery bed on which reeds grow in water, and a nursery bed on which reeds can grow can be attached in various places. The material and the shape thereof are not particularly limited. Examples of the material used for the structure include a synthetic resin having a specific gravity smaller than that of water and a foamed material. The structure can also be made from naturally reducible materials. Examples of the synthetic resin include polystyrene resin, polyvinyl chloride resin, polyethylene resin, acrylic resin, polypropylene resin, polycarbonate resin, polyamide resin,
Polyacetal resin, polybutylene terephthalate resin, polyethylene terephthalate resin, modified polyphenylene ether, epoxy resin, unsaturated polyester resin, polyurethane resin, phenol resin, urea resin,
Examples include melamine resin and silicone resin.

Examples of the shape include a sponge block shape, a flat block shape of a loofah shape, or a type in which inverted trapezoidal units are combined.
Further, a honeycomb structure, a structure having an S-shaped or wavy core in cross section, a quilted continuous body, a structure made of a structural material having a cross section such as a lattice, a net, a wavy shape, a tubular shape, or a spherical shape can be given. . The water-floating structure preferably has a structure that is formed into a loofah shape having a thickness of about 10 to about 25 cm and has a buoyancy force sufficient to float a nursery bed produced by Reed against water. To be For example, a commercially available floatable resin molded product having a specific gravity of about 0.93 may be used, and a typical shape thereof is that shown by reference numeral 10 as a partial sectional perspective view in FIG. The nursery bed 8 on which the reeds grow is, for example, a bamboo skewer 9 on a water-floating structure 10 formed into a loofah shape having a thickness of about 15 to about 20 cm.
It is fixed using. An example of the typical fixing method is
It is shown schematically in FIG. In the contaminated water purification unit of the present invention, the bottom of the medium of the nursery bed on which the reed grows is only submerged in water, and the unit itself floats on the water surface, so that the contaminated water to be purified can flow to the lower part of the reed vegetation. It will be possible. For example, in an environment adjacent to a lake or the like, even if the amount of water temporarily increases, the nursery where the reed grows will not be submerged, and it is possible to constantly maintain an environment suitable for the growth of the reed,
Especially, even in the initial stage of transplantation of reeds, conditions suitable for the growth of reeds can be obtained. Even if the reed grows and sinks under its own weight, the reed itself floats in the water, so the floating structure does not sink to the bottom. Further, the depth of the flowing water can be changed according to the growth of roots, for example, the water depth can be extended to about 1 m or more, and it is formed between the treated water and the surface of the root group of reeds. The area of the biofilm can be increased, and the unit amount of treated water that can be flowed can be increased.

The contaminated water purification unit according to the present invention can be arranged so as to be floatable in the contaminated water purification channel . In this contaminated water purification waterway, the contaminated water purification unit is arranged from the contaminated water inflow side to the treated water outflow side, and the contaminated water flowing in from the inflow side is regenerated by the reeds growing in the contaminated water purification unit. It flows between the root groups to the outflow side of the treated water. An overflow bank is provided on the outflow side of the purification waterway, and the treated water flows out beyond this bank. FIG. 6 shows the structure of a typical contaminated water purification channel. The height of the overflow bank can be adjusted according to the growth level of the roots of the reed. In this way, the optimum environment for sewage treatment can be maintained. Since the contaminated water purification unit is constantly floating on the water surface, the contaminated water comes into contact with a large amount of biofilm formed in the roots of the reed. The number of reed roots is much larger than that of the stems, the growth rate thereof is faster, and the length thereof can be extended to about 1 m or more. Thus, suspended matter in polluted water is trapped between the roots of reeds while passing between the roots. However, the porosity between the roots of reed is much larger than that of soil, so it is hard to clog, and even if it is clogged, it can be effectively used as a reed wetland as it is, and the nutrients in the sludge are absorbed by reed. Then, there is an advantage that the nutrient salt is prevented from dissolving in the water system. According to the above , it is possible to maximize the effects of contact precipitation, contact oxidation, and nutrient salt absorption by the roots of reeds, and it is possible to treat even the bottom water of the waterway, so the purification efficiency is high.

Since the reed is a perennial plant and can overwinter, it can be used permanently at the facility and no maintenance work is required every year. Since the reeds supply oxygen from the roots to the outside, the so-called biofilms that attach to the roots are maintained aerobically, thus eliminating the need for aeration and reducing facility operating costs.

The contaminated water purification unit according to the present invention is useful for stabilizing dredging sludge and purifying polluted water in such a place. FIG. 7 schematically shows the state of the eutrophied polluted water area as a partial cross-sectional perspective view. Shown in FIG.
As described above, a part of the water area where such sludge 14 is accumulated is surrounded by, for example, a fence (wooden shelf) 15 , and a hole (excess water discharge port) 17 for discharging excess water of the dredged sludge inside the enclosure 17
The floating body water blocking sheet 16 having the above is installed. Excess water outlet
It is preferable to install a silt protector 18 around the area 17 . The fence 15 can be provided both at the center of the body of water and at the coast. The location can be selected in consideration of the landscape, harmony with nature, cost, etc. The fence may be made of wood, bamboo, etc.,
Below the surface of the water can be about 40 cm to about 150 cm. The fence is not particularly limited as long as the dredged sludge does not flow out of the enclosure. As described above, the sludge in the water area where the sludge is accumulated is dredged and put into the section that forms a closed system that surrounds the constant part of the water area provided in the sludge sedimented polluted water area. When throwing in, use a mechanical device known in the relevant field such as a pipeline to prevent foul odor caused by sludge from scattering, for example, dredging and depositing without exposing sludge to the surface of the water. Is preferred. Thus sludge is that be filled up to a height of 該柵.

When the dredging of the sludge is completed in this way, the contaminated water purification unit according to the present invention is then installed in the floating body water blocking sheet 16.
Float inside. A floating body reed community formation facility according to the present invention is schematically shown in FIG. In this way, the floating reed grows, the roots of the reed extend from the water to the inside of the sludge 14 ,
At the stage where the floating reed community and sludge are integrated, the float of the floating water impermeable sheet 16 is removed, and the sheet is sunk or removed so that water can be exchanged with the external water area. Here, the stage where the floating reed community and sludge are integrated refers to a state in which the root group of reed grows and grows in the sludge, and the contaminated water purification unit consisting of the floating reed is sufficiently fixed and does not move. The floating reed community may be integrated with the sludge in the presence of a fence forming a compartment, or optionally, with some or all of the fence removed, integrated with the sludge. FIG. 10 schematically shows a pattern in which the floating body reed community formation facility and sludge according to the present invention are integrated.
Nutrient contained in sludge 14 in this way is absorbed from the roots of Yo <br/> sheet 2, it is utilized, such as the growth of the reed 2,
Its elution is suppressed. The polluted water is water that flows through the roots of the reeds by natural energy such as air flow, and is purified by the contact roots and the catalytic oxidation by the roots of the reeds. Mechanical means may be taken to secure water flow. A method for treating sludge based on the above principle also forms part of the present invention.

According to the sludge treatment method of the present invention, the dredged sludge can be disposed of in the eutrophied polluted water area without taking it out, and the cost and labor for transportation and the like are not required. In addition, since reeds can be planted under the surface of the water while the dredging sludge is filled, there is little problem of secondary pollution such as odor. Reeds are not planted directly on the dredged sled, but reeds are planted on the floating structure, and the floating structure can be placed in a floating manner, so workability is good,
It is labor-saving and can save a lot of cost. While the reeds absorb the nutrient salts of the sludge, the root groups of the reeds can participate in the contact precipitation and the catalytic oxidation action, and the sludge can be stabilized at low cost. Moreover, after the stabilization of sludge is completed, the reed can directly contribute to the purification of water in the water area. Since reeds are used, a lush landscape is created by vegetation, and a more natural ecosystem can be created because it is purified by plants mainly reeds.

[0016]

EXAMPLES Next, the present invention will be described more specifically by showing examples, but it is understood that the present invention is not limited to these examples and can be carried out in various forms as long as the idea thereof is followed. Should be.

As shown in FIG . 3 (a nursery bed and an explanatory view of the principle of raising seedlings from seeds to reeds), a disc-shaped commercially available peat moss pot 8 having a diameter of about 5 cm is soaked in water and suitable for plant growth. The soybean seeds 7 collected from the wild reed 6 are sown in the water soaked, and about 15
Grow at a temperature of ~ 30 ° C. Figure 8 is a peat mosspot nursery with reed seedlings growing to a height of about 10 to 25 cm.
In polypropylene resin as shown in 4, and a specific gravity which is molded in gourd shape having a thickness of about 15 to about 20cm to about 0.
Commercially available floatability structure 93 5 to 10 (molded resin)
Then, the bamboo skewers 9 are used for fixation as shown in FIG.

[0018] Incidentally, water floating structural body 10, FIG. 6
Contaminated water purification waterway 12 as shown in (A) and (B)
You can also float in sequence. (A) is a schematic plan view,
(B) is a schematic sectional view. Reed 2 having a height of about 9.5 cm under water flow showed an increase of 1.5 cm in height in one week. On the other hand, the roots grew about 10 cm on average in one week and grew more densely. Reference numeral 3 is treated water, 11 is an overflow bank , and 13 is settled sludge . It was confirmed that the number of reed roots was extremely large compared to the number of stems, the growth rate thereof was fast, and the length thereof was extended to about 1 m or more. Suspended matter in polluted water was trapped between the roots of the reed while passing between the roots. The treated water that passed through the dense group of reeds showed a decrease in nutrients. Thus, the contact precipitation with roots surplus, catalytic oxidation, it is possible to take full nutrient absorption, can be processed to the bottom layer water of the water channel, it was confirmed that high purification efficiency.

In the eutrophic polluted water area as shown in the partial cross-sectional perspective view of FIG . 7, a part of the water area in which the sludge 14 is deposited is shown in the partial cross-sectional perspective view of FIG. The fence was surrounded by a wooden fence 15 so that the depth under the surface of the fence was about 50 cm. A floating body water blocking sheet 16 having holes capable of discharging excess water of dredging sludge was installed inside the enclosure. A silt protector 18 was installed around the surplus water outlet 17. As described above, in the section forming a closed system surrounding the periphery of the certain part of the water area provided in the sludge sediment polluted water area,
Dredging the accumulated sludge and inputting it. The sludge fills to the height of the fence. After the dredging of the sludge was completed in this way, the contaminated water purification unit was floated inside the floating body water blocking sheet 16 . As shown in the partial cross-sectional perspective view of FIG.

When the floating reeds were grown for one week, the roots of the reeds extended from the water to the inside of the sludge. About 9.5c
Using a m. reed seedling, the roots grew about 10 cm in one week and grew densely. One year later, the floating body reed community formation facility and the sludge were integrated, as shown in FIG. 10 as a partial sectional perspective view. At the stage where the 2 reed bodies of the floating body and the sludge 14 were integrated, the floating member of the floating body water-blocking sheet was removed, and the sheet was removed to make it possible to exchange water with the external water area. The nutrients contained in the sludge are
It is absorbed from the roots of reeds and used for growth of reeds, and its elution is suppressed. The polluted water is water that flows through the roots of the reeds by natural energy such as air flow, and is purified by the contact roots and the catalytic oxidation by the roots of the reeds.

[0021]

EFFECT OF THE INVENTION Sludge treatment facility and sludge treatment of the present invention
According to the method, dredged sludge was removed from within the eutrophic polluted water area.
Can be disposed of without having to take it outside, costs such as transportation,
It is labor-free and you can fill the dredging sludge below the surface of the water.
Since reeds can be planted, there is less problem of secondary pollution such as odor.
Absent. Do not plant reeds directly on the dredging sleds and add them to the floating structure.
What you have to do is to plant the shii and place the floating structure in a floating manner.
Therefore, the workability is good, labor is not required, and the cost is significantly increased.
You can save money. When Yoshi absorbs the nutrients of sludge
In addition, the root group of reeds is involved in contact precipitation and oxidation.
It is possible to stabilize sludge at low cost. Also of sludge
After stabilization, the reeds will continue to
Since it can contribute to the purification of water and uses reeds,
A lively green landscape was created, and Yoshi was the main
A more natural ecosystem of plants can be created.

[0022]

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a water purification method using a reed according to a surface flow method of flowing conventionally used polluted water to its surface layer.

FIG. 2 shows a schematic cross-sectional view of a water purification method using a reed according to a permeation flow method for permeating polluted water into soil, which is conventionally used.

FIG. 3 shows a nursery bed used in the examples of the present invention and an explanatory diagram of the principle of raising seedlings from seeds to reeds.

4 shows a partially sectional perspective view of is that the water floating structural body used for allowed to fix the seedbed for use in the embodiment of the present invention.

FIG. 5 is a schematic sectional view showing a case where a nursery bed used in an example of the present invention is fixed to a water floating structure.

6 shows a structural diagram of a polluted water purifying canal by root systems of surplus funds. A: plan view, B: sectional view

FIG. 7 shows a partial cross-sectional perspective view of the condition of a eutrophied polluted water area.

FIG. 8 is a partial cross-sectional perspective view schematically showing the arrangement of typical equipment of the present invention provided in a sludge sediment polluted water area.

FIG. 9 schematically illustrates a floating body reed community formation facility according to the present invention as a partial sectional perspective view.

FIG. 10 is a partial cross-sectional perspective view schematically showing a pattern in which a floating body reed community formation facility and sludge according to the present invention are integrated.

[Explanation of symbols]

1 Contaminated water 2 Reed 3 Treated water 4
Soil 5 Soil or gravel 6 Naturally vegetated reed 7
Reed seeds 8 Petemospots (nurseries) 9 Bamboo skewers 10
Water floating structure 11 Overflow bank 12 Contaminated water purification channel 1
3 Settled sludge 14 Sludge 15 Wooden fence 1
6 Floating body water blocking sheet 17 Excess water discharge port 18 Silt protector

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryuzo Tazawa 1-3-2 Shibaura, Minato-ku, Tokyo Within Shimizu Construction Co., Ltd. (72) Inventor Katsumi Shimizu 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Munehiro Hamamoto 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (56) Reference JP-A-51-90161 (JP, A) JP-A-6 −15293 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C02F 3/00-3/34 C02F 11/00-11/20 A01G 31/00-31/06

Claims (5)

(57) [Claims] 1. A reed constructed by fixing a reed nursery bed to a water-floating structure so that at least the soil bottom for cultivation in the nursery bed can be submerged in the sludge sedimentation section dredged from the sludge-deposited polluted water area. A sludge treatment facility that uses reeds, which has a contaminated water purification unit that is used to stabilize sludge and purify polluted water. 2. In the sludge sediment polluted water area, a section that surrounds a certain portion of the water area to form a closed system is installed,
The inside said compartments is deposited sludge was dredged, the seedbed reed, contaminated water purification utilizing reed at least culture soil bottom was constructed allowed fixed water floating structure body so as to be capable flooded該苗bed After the unit has been installed in the compartment, the roots of the reeds can be grown until they fully extend into the sediment sludge, and after the contaminated water purification unit utilizing the reeds and the sediment sludge are integrated. Is a sludge treatment facility that uses reeds, which is capable of passing water to be purified. 3. A nursery growing the surplus is, sludge process utilizing reed according to claim 1 or 2 in which packed with culture soil which was composed mainly of peat moss in a net container made of synthetic resin Facility. 4. A sludge treatment facility using reeds according to claim 1 or 2, wherein the water-floating structure is made of foamed synthetic resin. 5. The sludge sediment polluted water area is provided with a section surrounding a certain portion of the water area to form a closed system,
Then after depositing the sludge was dredged in the compartment, the seedbed reed, contaminated water utilizing reed at least culture soil bottom was constructed allowed fixed water floating structure body so as to be capable flooded該苗bed A purification unit is installed in the compartment, the roots of the reeds are grown until they fully extend into the accumulated sludge, and after the contaminated water purification unit that utilizes the reeds and the accumulated sludge are integrated, water for purification is passed through. A sludge processing method using reeds characterized by making them possible.