JPWO2008068872A1 - Advanced purification system for sewage using a fishway with contact oxidation bank - Google Patents
Advanced purification system for sewage using a fishway with contact oxidation bank Download PDFInfo
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- 230000003647 oxidation Effects 0.000 title claims abstract description 44
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 44
- 239000010865 sewage Substances 0.000 title claims abstract description 41
- 238000000746 purification Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 abstract description 4
- 239000010802 sludge Substances 0.000 abstract description 4
- 235000014102 seafood Nutrition 0.000 abstract description 3
- 230000003197 catalytic effect Effects 0.000 description 5
- 230000007704 transition Effects 0.000 description 4
- 241000251468 Actinopterygii Species 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 1
- 238000006424 Flood reaction Methods 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/06—Aerobic processes using submerged filters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/60—Ecological corridors or buffer zones
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
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Abstract
【目的】 きれいな下水を、きれいな河川に放流すれば、きれいな河川が汚染される。このため、接触酸化堤による魚道を利用した下水の高度浄化装置により放流下水を高度に浄化しようとするものである。【構成】 放流下水や放流下水の混合した河川水の縦断方向に連続して設けられた多空隙を有する接触酸化堤の上下流の両端部にそれどれ左右に可動堰を配置し、上下流の可動堰を交互に操作することにより、大量の放流下水を透過させ浄化すると共に、時には、この装置を縦列または横列的に配置し、繰返し操作ことにより、目詰まりを防止し、高度な水質を維持する【効果】自然のエネルギを利用して下水の排水を浄化する装置で、水処理に要するランニングコストが不要であり、しかも、水処理に伴う汚泥は自然の生態循環の中で処理され、流出オイルやヘドロも浄化され魚介類がおいしくなる。[Purpose] If clean sewage is discharged into clean rivers, clean rivers will be contaminated. For this reason, it is going to refine | purify discharged sewage highly by the advanced purification apparatus of the sewage using the fishway by a contact oxidation bank. [Composition] Disposed sewage and mixed water weirs are arranged on both sides of the upstream and downstream ends of the contact oxidation levee with multi-gap provided continuously in the longitudinal direction of the river water mixed with the discharged sewage. By alternately moving movable weirs, a large amount of discharged sewage is permeated and purified, and sometimes this device is arranged in columns or rows, and repeated operation prevents clogging and maintains high water quality. [Effect] Equipment that purifies sewage drainage using natural energy, eliminating the running costs required for water treatment, and sludge from water treatment is treated in the natural ecological cycle and discharged. Oil and sludge are also purified and the seafood becomes delicious.
Description
本願発明は接触酸化堤による魚道を利用した下水の高度浄化装置を利用した下水の高度浄化装置に関する。 The present invention relates to an advanced sewage purification apparatus using an advanced sewage purification apparatus using a fishway by a contact oxidation bank.
砂石の中を水が透過すると、自然の力によって水がきれいになる。また、春先には、多くの魚類が溯上し、夏場は上流で栄養を摂取し、川の水をきれいにしながら成長して、秋口に成魚となり川を下る。
かつて、１９８１年に、ＰＴＣ／ＪＰ８２／００４１９（ＪＰ？１８０６９５４）「水域の浄化システム」を発明した。この技術は、水位変化のある水域で、多空隙を有する砕波堤（接触酸化堤）を用いて浄化しようとする水域を包囲して締め切る「水域の空（ＵＴＳＵＲＯ）」を構成するもので、外水域の水位変化に伴い、「水域の空（ＵＴＳＵＲＯ）」を構成する接触酸化堤を透過し、浄化されたきれいな水が「水域の空（ＵＴＳＵＲＯ）」内、外に流出入を繰り返す、自然の水質浄化技術である。
また２００４年に特許弟３５３４０６１号「接触酸化堤の水位変動装置を利用した魚道装置」を発明した。この装置は接触酸化堤を利用して水を浄化しながら魚の遡上助ける装置であり、これらの技術を利用して、下水の放流の高度浄化を促進しようとするものである。
In 1981, PTC / JP82 / 00419 (JP? 1806954) "water purification system" was invented. This technology constitutes a “water area sky (UTSURO)” that surrounds and closes the water area to be purified by using a breakwater bank (contact oxidation bank) with multiple voids in a water area where the water level changes. As the water level changes in the water area, it passes through the contact oxidation dike that constitutes the “water area sky (UTSURO)”, and the purified clean water repeatedly flows into and out of the “water area sky (UTSURO)”. Water purification technology.
Also, in 2004, he invented the patent brother 3534061 “Fishway device using the water level fluctuation device of the contact oxidation bank”. This device is a device that assists the fish going up while purifying water using a contact oxidation bank, and is intended to promote advanced purification of sewage discharge using these technologies.
きれいな下水が、きれいな河川やきれいな海域に放流すれば、きれいな河川やきれいな海域が汚染される。
これは下水の放流基準（高級処理）はＢＯＤ２０ｐｐｍで、きれいな河川はＢＯＤで２ｐｐｍ以下で、きれいな海域はＣＯＤで０２以下である。きれいな下水ときれいな河川の間では１桁、きれいな海域では二桁の隔たりがある。
最近では高級処理した下水を、更に急速ろ過を行い、オゾン処理や活性炭処理を行っているのが現状である。
この為、下水の処理費が嵩み受益者の大きな負担となっている。
したがって、自然のエネルギーを利用した「接触酸化堤による魚道を利用した下水の高度浄化装置」により、これらの問題を解決しようとするものである。If clean sewage is discharged into clean rivers and clean waters, clean rivers and clean waters will be contaminated.
The sewage discharge standard (high-grade treatment) is BOD 20 ppm, the clean river is 2 ppm or less in BOD, and the clean sea area is 02 or less in COD. There is a one-digit gap between clean sewage and clean rivers, and a double-digit gap between clean waters.
Recently, high-grade treated sewage is further subjected to rapid filtration, ozone treatment and activated carbon treatment.
For this reason, the treatment cost of sewage increases and it becomes a big burden on beneficiaries.
Therefore, the “sewage advanced purification device using the fishway by the contact oxidation bank” using natural energy intends to solve these problems.
放流下水路や放流下水の流入した河川の縦断方向に連続して設けられた、多空隙を有する接触酸化堤の上流及び下流の両端部に、それどれ左右に可動堰を設置し、上下流の可動堰を交互に操作をすることによって、放流下水や放流下水の混入した河川水（以下放流汚水と言う）を多空隙を有する接触酸化堤を透過させ、時にはこの装置を縦列または横列的に配置し、汚水を高度に浄化しようとするものである。 Movable weirs are installed on the left and right sides of the upstream and downstream ends of the multi-gap contact oxidation dike, which are continuously installed in the longitudinal direction of the discharge sewage channel and the river into which the sewage flows. By operating the movable weir alternately, river water mixed with discharged sewage or discharged sewage (hereinafter referred to as discharged sewage) is permeated through a multi-gap contact oxidation bank, and sometimes this device is arranged in columns or rows. In addition, the sewage is highly purified.
放流下水路や放流下水の混合した河川の縦断方向に連続して設けられた、多空隙を有する接触酸化堤は、上下流の４個所の可動堰を交互に操作することにより、接触酸化堤の左右に水位差を設けることにより、放流汚水を大量に接触酸化堤を透過させ浄化することが可能になる。時には、この装置を縦列または横列的に配置し、繰返し操作ことにより、高度な水質を維持することが可能になる。
接触酸化堤を透過した水はオイルの除去効果も高く、交互に操作により接触酸化堤の欠点である目詰まりを防止し、透明度が高く、水底に藻類が発生し光合成作用が活発に行われ豊酸素水域となり、ヘドロの発生や予防効果がある。
さらに、魚介の遡上も容易にし、浄化に伴い接触酸化堤１の生物膜に取り込まれた栄養物（廃棄物）は、生態循環の中で処理される。A multi-gap contact oxidation levee provided continuously in the longitudinal direction of a discharge sewage channel or a river mixed with sewage sewage is operated by alternately operating four movable weirs upstream and downstream. By providing a difference in water level between the left and right, it becomes possible to purify a large amount of discharged sewage through the contact oxidation bank. Sometimes, it is possible to maintain a high level of water quality by arranging the devices in columns or rows and repeating them.
Water that has permeated through the contact oxidation bank has a high oil removal effect, and alternately prevents clogging, which is a drawback of the contact oxidation bank, and has high transparency, algae is generated at the bottom of the water, and photosynthesis is actively performed. It becomes an oxygen water area, and has the effect of generating sludge and preventing it.
Furthermore, it is easy to go up the seafood, and the nutrients (waste) taken into the biofilm of the contact oxidation bank 1 along with the purification are processed in the ecological cycle.
［図１］接触酸化堤による魚道を利用した下水の高度浄化装置の面図で［図１−（ａ）］は接触酸化堤１の上流部の可動堰の右２１閉鎖、左２２開放，下流部の可動堰の右３１開放、左３２閉鎖の状態を表し、［図１−（ｂ）］は接触酸化堤１の上流部の可動堰の右２１開放、左２２閉鎖，下流部の可動堰３１の右閉鎖、左３２開放の状態を表す。
［図２］接触酸化堤による魚道を利用した下水の高度浄化装置のＣ−Ｃ断図で［図２−（ａ）］上記［図１−（ａ）］のＣ−Ｃ断図を示し、［図２−（ｂ）］は［図１−（ｂ）］のＣ−Ｃ断図を示す。[1] surface contact with view of the advanced purification system of sewage using a fishway by oxidation Tsutsumi [FIG 1-(a)] is right 2 1 closure of the movable dam upstream of the catalytic oxidation bank 1, left 2 2 opening , right 3 1 opening of the movable weir downstream portion, represents the state of the left 3 2 closed, FIG. 1- (b)] is right 2 1 opening of the movable dam upstream of the catalytic oxidation bank 1, left 2 2 closed , movable weir 3 1 of the right closure of the downstream portion, representing the state of the left 3 2 open.
[Fig. 2] CC cut of the advanced purification device of sewage using a fishway by contact oxidation bank [Fig. 2- (a)] shows the CC cut of [Fig. 1- (a)] above, [FIG. 2- (b)] shows a C-C cut-out view of [FIG. 1- (b)].
１ 接触酸化堤
１´ 横列の接触酸化堤
２ 上流部の可動堰（２１２２は左右の可動堰）
３ 下流部の可動堰（３１３２は左右の可動堰）
４ 水路壁や護岸
５ 放流下水や放流下水の混入した河川水の流れの方向
６ 左側のポンド（酸化池）
７ 右側のポンド（酸化池）
８ 上流の水域
９ 下流の水域
１０ 河床DESCRIPTION OF SYMBOLS 1 Contact oxidation bank 1 'Contact oxidation bank of a row 2 Movable weir of an upstream part (2 1 2 2 is a right and left movable weir)
3 Downstream movable weir (3 1 3 2 are left and right movable weirs)
4 Waterway walls and revetment 5 Direction of flow of river water mixed with discharged sewage and discharged sewage 6 Pound on the left side (oxidation pond)
7 Pound on the right (oxidation pond)
8 Upstream water area 9
以下［実施例］と合わせて説明する The following is described together with [Example]
本願発明の実施例を図面に基づいて説明する。
１は接触酸化堤で、材料は公知の浄化ブロック、コンクリートブロック、岩石、砂礫、蛇篭、ふとん篭等で、これ等を累積した多空隙のある堤体である。
図−１は平面図、図−２はＣ−Ｃ断面図を表す。このような接触酸化堤を放流下水路や放流下水の混合した河川の流水の（縦断）方向に１のように設置し、このような接触酸化堤１の上流端左２１右２２、及び、下流端左３１、右３２に可動堰を設置する。
可動堰２１２２３１３２は、公知の引き上げ式、転倒式、チュブ式等の可動堰で、▲×▼は閉鎖された状態を表し、▲□▼は開放された状態を表す。
〈図の（ａ）〉Embodiments of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a contact oxidation bank, and the material is a known purification block, concrete block, rock, gravel, gabion, futon, etc., which is a multi-cavity bank body in which these are accumulated.
FIG. 1 is a plan view, and FIG. 2 is a cross-sectional view taken along the line CC. Such contact oxidation dike is installed as 1 in the direction of flowing water (longitudinal) of the discharge sewage channel or river mixed with sewage, and the upstream end left 21 1 right 2 2 of such contact oxidation dike 1 and The movable weir is installed at the downstream end left 3 1 and right 3 2 .
Movable weirs 2 1 2 2 3 1 3 2 are well-known movable weirs such as a pulling-up type, a tipping type, and a tube type, and ▲ x represents a closed state and □□ represents an opened state.
<(A) in the figure>
接触酸化堤１の上流部の可動堰の右２１閉鎖、左２２開放，下流部の可動堰の右３１開放、左３２閉鎖の状態を表す。
したがって、図の（ａ）は、上流から流れてきた汚水は右側のオープン状態の可動堰２２流下して酸化池７に入るが下流部可動堰３２が閉鎖されているため、酸化池７の水位が上昇し、透過性の接触酸化堤１を浄化されながら透過して、酸化池６に流入し、下流の左の可動堰３１がオオプン状態になっているため浄化された水が自然に流下する。
〈（ｂ）の状態への移行〉Right 2 1 closure of the movable dam upstream of the catalytic oxidation bank 1, left 2 2 open, right 3 1 opening of the movable weir downstream portion, representing the state of the left 3 2 closure.
Thus, (a) in the figure, since it is sewage flowing from upstream into the movable dam 2 2 flow to oxidation pond 7 of the right open is closed downstream portion movable weir 3 2, oxidation ponds 7 the rising water level of the catalytic oxidation bank 1 of permeability transmitted while being purified, flows into the oxidation pond 6, the water that has been purified for the movable dam 3 1 downstream of the left is in Oopun state nature To flow down.
<Transition to the state of (b)>
次に、図の（ｂ）の状態への移行については、上流部右の可動堰２２を閉鎖し、ポンド７の水位が、ポンド６程度に低下したことを確認して、下流部左の可動堰３１を閉鎖し右の可動堰３２開放すると同時に、上流部左の可動堰２１を開放することによって、図の（ｂ）の状態となる。
〈図の（ｂ）〉Next, the transition to the state of (b) of FIG, the upstream portion right movable dam 2 2 closed, the water level of the pound 7, ensure that dropped to about £ 6, downstream of the left At the same time the movable dam 3 1 closes and the movable dam 3 2 opening of the right, by opening the movable dam 2 1 upstream portion left in the state of (b) in FIG.
<(B) in the figure>
接触酸化堤１の上流部の可動堰の右２１開放、左２２閉鎖，下流部の可動堰３１の右閉鎖、左３２開放の状態を表す。
したがって、図の（ｂ）の状態は、上流から流れてきた放流下水や放流下水の混入した河川水は右側のオープン状態の可動堰２１通過して酸化池６に流入するが下流の可動堰が閉鎖されているため、酸化池６の水位が上昇し、透過性の接触酸化堤１左から右に透過して、浄化された水が酸化池７に流入し、下流の左の可動堰３２がオオプン状態になっているため自然に流下する。
図の（ａ）の状態になるのを待つ。
〈（ａ）の状態への移行〉Right 2 1 opening of the movable dam upstream of the catalytic oxidation bank 1, left 2 2 closed, the movable dam 3 1 of the right closure of the downstream portion, representing the state of the left 3 2 open.
Therefore, the state of (b) in the figure, contaminating river water sewage effluent or sewage effluent flowing from upstream flowing into the oxidation pond 6 and movable weir 2 1 passing right open but downstream of the movable dam Is closed, the water level of the oxidation pond 6 rises, the permeable contact oxidation levee 1 permeates from the left to the right, and the purified water flows into the oxidation pond 7, and the downstream left movable weir 3 Since 2 is in the open state, it flows down naturally.
Wait until the state shown in FIG.
<Transition to (a) state>
図の（ａ）の状態への移行については、上流部右の可動堰２１を閉鎖し、ポンド６の水位が、ポンド７程度に低下したことを確認して、下流部左の可動堰３２を閉鎖し右の可動堰３１を開放すると同時に、上流部左の可動堰２２を開放することにより、図の（ａ）の状態となる。
上記の操作を繰り返すことによって、放流下水や放流下水の混入した河川水がきれいになり、魚介類の溯上も容易になる。
さらに洪水時には、すべての堰を開放する。The transition to the state of (a) of FIG, the movable dam 2 1 upstream portion right closed, the water level of the pound 6, ensure that dropped to about £ 7, downstream portion left of the movable weir 3 At the same time 2 to open the movable weir 3 1 right closed, by opening the upstream portion movable weir 2 2 left, the state of (a) of FIG.
By repeating the above operation, the discharged sewage and the river water mixed with the discharged sewage are cleaned, and it is easy to fish seafood.
In addition, all the weirs are opened during floods.
なお、上下流左右の可動堰を交互に操作をすることによって、接触酸化堤の左右に水位差をつけ、接触酸化堤を河川の水を透過させ浄化すると共に、水質浄化効果を持続させるために、交互に操作により、接触酸化堤を右から左、左から右と透過させる方向を交互に変化させ、接触酸化堤の目詰まりを防止する。
さらに、これらの浄化能力や浄化容量を高めるために、時には上記の装置を並列的または縦列的に配置して上記の問題を解決するものである。In addition, by operating the movable weirs on the upstream and downstream alternately, the water level difference is made on the left and right of the contact oxidation dike, and the contact oxidation dike is permeated through the river water and purified, and the water purification effect is maintained. By alternately operating, the direction in which the contact oxidation dike is transmitted from right to left and from left to right is alternately changed to prevent clogging of the contact oxidation dike.
Furthermore, in order to increase the purification capacity and the purification capacity, the above-mentioned devices are sometimes arranged in parallel or in a column to solve the above problems.
当装置は自然の浄化システムを利用したものであり、水処理により発生する汚泥は生態循環の中で自然に処理される。
また、ランニングコストも不要で、中でも一般的に下水処理の中で三次処理は下水処理で最も経費が嵩み、受益者負担が大きくなるが、当顔発明では軽減され為産業上の利用の可能性が高い。This equipment uses a natural purification system, and sludge generated by water treatment is naturally treated in the ecological cycle.
In addition, there is no running cost. Among them, tertiary treatment is generally the most expensive in sewage treatment, and the burden on the beneficiary is large. High nature.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2006/324601 WO2008068872A1 (en) | 2006-11-30 | 2006-11-30 | Apparatus for highly purifying sewage water using fish road formed by contact oxidation bank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPWO2008068872A1 true JPWO2008068872A1 (en) | 2010-03-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008548157A Pending JPWO2008068872A1 (en) | 2006-11-30 | 2006-11-30 | Advanced purification system for sewage using a fishway with contact oxidation bank |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPWO2008068872A1 (en) |
| WO (1) | WO2008068872A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114867917B (en) * | 2020-01-07 | 2024-07-23 | 赤井一昭 | Method for preventing repeated (tsunami/flood/river) disasters by using natural force |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445580A (en) * | 2014-10-28 | 2015-03-25 | 黄斌夫 | Water purification method for rivers and lakes |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63200892A (en) * | 1987-02-18 | 1988-08-19 | Akai Isao | Continuous cleaning system of flowing water utilizing water level varying device of catalytic oxidation bank |
| JP2000233194A (en) * | 1999-02-15 | 2000-08-29 | Toyo Tire & Rubber Co Ltd | Cleaning apparatus for water channel |
| JP3534061B2 (en) * | 2000-09-19 | 2004-06-07 | 一昭 赤井 | Fishing line equipment using water level fluctuation device of contact oxidation dyke |
-
2006
- 2006-11-30 WO PCT/JP2006/324601 patent/WO2008068872A1/en active Application Filing
- 2006-11-30 JP JP2008548157A patent/JPWO2008068872A1/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114867917B (en) * | 2020-01-07 | 2024-07-23 | 赤井一昭 | Method for preventing repeated (tsunami/flood/river) disasters by using natural force |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008068872A1 (en) | 2008-06-12 |
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