JP2720287B2 - River aeration facilities - Google Patents
River aeration facilitiesInfo
- Publication number
- JP2720287B2 JP2720287B2 JP3907794A JP3907794A JP2720287B2 JP 2720287 B2 JP2720287 B2 JP 2720287B2 JP 3907794 A JP3907794 A JP 3907794A JP 3907794 A JP3907794 A JP 3907794A JP 2720287 B2 JP2720287 B2 JP 2720287B2
- Authority
- JP
- Japan
- Prior art keywords
- river
- air
- aeration
- diffuser
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- 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
Landscapes
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、河川を流れる水に溶存
酸素（ＤＯ）を供給することによって浄化作用を促す河
川の曝気施設に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a river aeration facility for promoting the purifying action by supplying dissolved oxygen (DO) to water flowing through a river.
【０００２】[0002]
【従来の技術】産業の発達や生活様式の変化にともな
い、多くの河川、湖沼、貯水池などの水系域水質汚濁が
問題になっている。本来、自浄作用により浄化されてい
た河川域、特に、都市周辺域の河川では産業及び生活廃
水の流入が増大し、自浄能力以上の汚濁物質が流入する
ため、ＣＯＤ（化学的酸素要求量）及びＢＯＤ（生物化
学的酸素要求量）の自浄作用が不足し、水質悪化が問題
視されている。このような状況下において、近年、汚濁
された河川水の浄化を図るために各種の浄化措置が採ら
れている。図６は、曝気により河川の浄化を図る従来の
曝気施設を示す正面図である。本図に示した曝気施設
は、河川の底部へ幅方向に散気管１０を配設し、空気供
給源１１から送られてきた空気を、この散気管１０から
河川水中に放出して、河川水の曝気を行なうものであ
る。このため、散気管１０には、縦軸方向に１０〜１０
０cmの間隔をおいて散気孔１２（ディフューザのことも
ある）が一列に設けてある。2. Description of the Related Art With the development of industry and changes in lifestyles, water pollution in water systems such as rivers, lakes, and reservoirs has become a problem. Originally, rivers that had been purified by the self-cleaning action, especially rivers around the city, increased inflow of industrial and domestic wastewater, and pollutants more than the self-cleaning capacity flowed in. Therefore, COD (chemical oxygen demand) and The self-cleaning action of BOD (Biochemical Oxygen Demand) is insufficient, and deterioration of water quality is regarded as a problem. Under such circumstances, various purification measures have been taken in recent years to purify polluted river water. FIG. 6 is a front view showing a conventional aeration facility for purifying a river by aeration. In the aeration facility shown in this figure, an air diffuser 10 is arranged in the width direction at the bottom of a river, and air sent from an air supply source 11 is discharged into the river water from the air diffuser 10 to form river water. Aeration. For this reason, the diffuser 10 has 10 to 10 in the longitudinal axis direction.
Aperture holes 12 (which may be diffusers) are arranged in a row at 0 cm intervals.
【０００３】[0003]
【発明が解決しようとする課題】通常、都市周辺域の河
川では、川岸に護岸ブロックを斜めに敷きつめて堤１が
構築されており、この堤１のために、河川の横幅は下方
に行くにしたがい狭くなり、川底にあって最も狭くなっ
ている。したがって、川底の全幅にわたり散気管１０を
配設しても、河川の両脇部分Ａは散気管１０から放出さ
れる気泡の浮上範囲から外れることとなり、曝気されな
いままの水がこの両脇部分Ａから通過してしまう。ま
た、従来の曝気施設に用いられていた散気管１０には、
散気孔１２を縦軸方向に一列のみ設けているに過ぎなか
ったので、これらの散気孔１２から放出される各気泡帯
１３相互の隙間Ｂが大きく、この隙間Ｂを曝気されない
まま多量の水が通過していた。以上のように、従来の曝
気施設では曝気効率が悪く、故に十分な曝気を行なうた
めには、散気量を増加するかあるいは河川流域に何本も
の散気管を配設しなければならず、運転または設備にコ
ストがかかるという課題を有していた。本発明はこのよ
うな課題を解決するためになされたもので、効率的に河
川の曝気ができ、経済的な河川の曝気施設を提供するこ
とを目的とする。Generally, in a river around a city, a bank 1 is constructed by laying dike blocks diagonally on the river bank, and the width of the river goes down due to the bank 1. It becomes narrower and narrowest at the bottom of the river. Therefore, even if the air diffuser 10 is disposed over the entire width of the riverbed, the both sides A of the river will be out of the floating range of the air bubbles discharged from the air diffuser 10, and the water which is not aerated will be discharged from both sides A. Will pass from. In addition, a diffuser 10 used in a conventional aeration facility includes:
Since only one row of the air diffusion holes 12 is provided in the longitudinal axis direction, the gap B between the respective bubble zones 13 released from these air diffusion holes 12 is large, and a large amount of water is left without aerating the gap B. Had passed. As described above, conventional aeration facilities have low aeration efficiency, and therefore, in order to perform sufficient aeration, it is necessary to increase the amount of diffused air or arrange a number of diffused pipes in the river basin. There was a problem that operation or equipment was costly. The present invention has been made to solve such a problem, and an object of the present invention is to provide an efficient river aeration facility capable of efficiently aerating a river.
【０００４】[0004]
【課題を解決するための手段】 上記目的を達成するた
めに、本発明の曝気施設は、斜面を有する堤が設けられ
た河川の曝気施設において、河川の川底の横幅を拡大す
るために、河川の両側の堤に形成された切欠きと、前記
切欠き間に配設されると共に、周壁の全周または部分的
周面に多数の散気孔を備えた散気管と、前記散気管に接
続される空気供給源とを備え、拡大した川底の全幅にわ
たって曝気するように構成されていることを特徴として
いる。Means for Solving the Problems In order to achieve the above object, an aeration facility of the present invention is an aeration facility for a river provided with a dike having a slope, in order to enlarge the width of the river bottom of the river. Notches formed in the embankments on both sides of the peripheral wall, an air diffuser provided between the notches, and having a number of air diffusers on the entire or partial peripheral surface of the peripheral wall, and connected to the air diffuser. And an air supply source, and is configured to be aerated over the entire width of the enlarged riverbed.
【０００５】[0005]
【作用】本発明は上記のように、河川の堤を一部切り欠
いて川底の横幅を拡大し、該川底の全幅にわたり散気管
を配設したので、河川の両脇部分にも散気管から放出さ
れた空気が行きわたり、効率的に曝気を行なうことが可
能となる。しかも、散気管の全周面または部分的周面に
多数の散気孔を備えているので、これらの散気孔から放
出された気泡の帯の隙間が小さく、流下してきた河川水
をもれなく曝気し得、一層効率的な曝気を実現できる。
なお、本発明の適用対象となる河川には、自然河川のみ
ならず、人工的に形成された水路をも含んでいる。According to the present invention, as described above, the width of the riverbed is enlarged by partially cutting out the bank of the river, and the air diffusers are arranged over the entire width of the riverbed. The released air spreads, and aeration can be performed efficiently. In addition, since a large number of air diffusion holes are provided on the entire peripheral surface or partial peripheral surface of the air diffuser, the gap between the bands of bubbles released from these air diffusion holes is small, and the river water flowing down can be aerated completely. Thus, more efficient aeration can be realized.
The rivers to which the present invention is applied include not only natural rivers but also artificially formed waterways.
【０００６】[0006]
【実施例】以下、本発明の一実施例について図面を参照
して詳細に説明する。図１は、本発明の一実施例に係る
河川の曝気施設を示す正面断面図、図２は、同施設の外
観を示す斜視図である。本実施例では、河川両岸の堤
１、１において、それぞれ対向する位置に切欠き２、２
を設けている。これらの切欠き２、２は、堤１、１の傾
斜面を水面との境界線１ａより外側の位置まで切除して
なり、切欠き側面１ｂは川底に対し鉛直面となってい
る。その結果、切欠き形成部分の川幅は、川底から水面
にかけて等しくなる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front sectional view showing an aeration facility for a river according to an embodiment of the present invention, and FIG. 2 is a perspective view showing an appearance of the facility. In the present embodiment, notches 2 and 2 are provided at opposing positions on the banks 1 and 1 on both sides of the river.
Is provided. These cutouts 2 and 2 are obtained by cutting the slopes of the banks 1 and 1 to positions outside the boundary 1a with the water surface, and the cutout side surfaces 1b are vertical to the riverbed. As a result, the river width of the notch forming portion becomes equal from the river bottom to the water surface.
【０００７】各切欠き２、２間の川底には、散気管３が
全幅にわたって配設されている。散気管３の先端は閉塞
端となっており、基端側が配管４を介して空気供給源５
と接続されている。空気供給源５としては電動式の圧送
ポンプ等、河川曝気に必要な空気量を散気管３の中空部
全体に供給できるものであればよい。この空気供給源５
は、通常、散気管３の配設箇所近くの河川敷に設置され
る。また、散気管３と配管４との接続部には、空気の供
給停止中に、後述する散気孔７から散気管３内に流入し
てきた水が配管４側へ流入することを阻止するために、
逆止弁６を設けてもよい。A diffuser 3 is provided at the river bottom between the notches 2 and 2 over the entire width. The distal end of the air diffuser 3 is a closed end, and the proximal end is connected to an air supply source 5 through a pipe 4.
Is connected to The air supply source 5 may be any type that can supply an air amount necessary for aerating the river to the entire hollow portion of the air diffuser 3, such as an electric pressure pump. This air supply 5
Is usually installed on the riverbed near the location of the diffuser 3. In addition, a connection portion between the diffuser pipe 3 and the pipe 4 is provided to prevent water flowing into the diffuser pipe 3 from the later-described diffuser hole 7 from flowing into the pipe 4 while the supply of air is stopped. ,
A check valve 6 may be provided.
【０００８】散気管３の周壁には、図３及び図４に示す
ごとく多数の散気孔７が穿設されている。これらの散気
孔７は、周壁の全周面にわたって形成してもよく、また
周壁の部分的周面、例えば上部半周面のみに穿設しても
よい。ここで、散気孔７の形状や配置等穿設形態は任意
でよく、少なくとも散気管３の周方向に分散して穿設さ
れていればよく、特に制限されることはない。好ましく
は、散気管３より上昇する気泡が平面を形成するごとく
なり、気泡が上昇しない水空間がないようにするのがよ
い。例えば、図に示す実施例では、縦軸方向に任意、で
きるだけ狭い間隔で散気孔７を穿設したもので、縦軸方
向に連なり各列８を形成する各散気孔７は、上下列で互
いに穿設箇所を同方向に僅かずつずらして穿設され、散
気管周面を縦軸方向にらせん状に細かいピッチで散気孔
７が形成されるように底部を除き穿設したものである。
このように形成することにより、各散気孔７から排出さ
れ水面へと上昇する気泡の帯間隔を一層狭小に、例えば
５ｍｍ間隔程度にすることができ、気泡が流通水を面状
に横切るように水中を上昇するため、曝気されないまま
水が通過することをなくすことができる。散気管３の横
断面形状は、多角形、円形等任意に選択することができ
る。また、散気管３の相当直径も任意であり、空気を流
通させることができ、かつ後述するごとく穿設される散
気孔７を通して空気を噴出できるものであればよい。散
気管３の材質も特に制限されるものでなく、被浄化河川
水中において、腐食等劣化せずに長期間形態等を保持で
きるものであればよい。一般には、塩化ビニル製管体を
用いることができる。As shown in FIGS. 3 and 4, a large number of air diffusion holes 7 are formed in the peripheral wall of the air diffusion tube 3. These air diffusion holes 7 may be formed over the entire peripheral surface of the peripheral wall, or may be formed only on a partial peripheral surface of the peripheral wall, for example, only on the upper half peripheral surface. Here, the perforation form such as the shape and arrangement of the diffuser holes 7 may be arbitrary, and is not particularly limited as long as it is perforated at least in the circumferential direction of the diffuser tube 3. Preferably, the bubbles rising from the air diffuser 3 form a flat surface so that there is no water space in which the bubbles do not rise. For example, in the embodiment shown in the figure, the air diffusion holes 7 are arbitrarily formed in the vertical axis direction at an interval as narrow as possible. The perforated portions are perforated with a slight shift in the same direction, and the perforated tube peripheral surface is perforated excluding the bottom so that the perforation holes 7 are formed at a fine pitch spirally in the longitudinal direction at a fine pitch.
By forming in this manner, it is possible to further narrow the band interval of the bubbles discharged from each diffuser hole 7 and rising to the water surface, for example, about 5 mm, so that the bubbles cross the flowing water in a plane. Ascending in the water, it is possible to prevent water from passing without being aerated. The cross-sectional shape of the air diffuser 3 can be arbitrarily selected, such as a polygon or a circle. The equivalent diameter of the diffuser tube 3 is also arbitrary, as long as it allows air to flow and can blow air through the diffuser hole 7 formed as described later. The material of the air diffuser 3 is not particularly limited, as long as it can maintain the form or the like for a long period of time in the river water to be purified without deterioration such as corrosion. Generally, a pipe made of vinyl chloride can be used.
【０００９】本発明は、上記のように構成されているた
め、空気供給源５から散気管３の中空部内に送られてき
た空気を、散気孔７を通して河川水中に放出する。散気
孔７から放出された空気は、図５に示すように連続的な
気泡の帯９を形成し、且つ、従来法で生じていた各気泡
帯間の間隙１３が殆どないような形態、即ち、気泡平面
を形成して水面に向い上昇して行く。各散気孔７から放
出された空気は、一部が河川水に溶け込み、その溶存酸
素量を増加させる。これにより河川水の曝気浄化が実現
される。本実施例では、河川の堤１、１に形成した切欠
き２、２によって、河川の横幅が川底から水面にかけて
等しくなっているので、川底の全幅に配設された散気管
３からの気泡の帯が、河川の幅方向に隅々まで行きわた
り、曝気効率の向上が図られる。さらに、本実施例の散
気管３は、周壁の全周面または部分的周面において、周
方向及び縦軸方向に多数の散気孔７を形成しているの
で、各散気孔７から排出される気泡の帯が面状に河川水
中で高密度に形成されるため、一層曝気効率が向上す
る。Since the present invention is configured as described above, the air sent from the air supply source 5 into the hollow portion of the air diffuser 3 is discharged into the river water through the air diffuser 7. The air released from the air diffusing holes 7 forms a continuous bubble band 9 as shown in FIG. 5 and has a form in which there is almost no gap 13 between the bubble bands which has been generated by the conventional method, that is, , Forming a bubble plane and rising toward the water surface. Part of the air released from the air diffusing holes 7 is dissolved in the river water, and the dissolved oxygen amount is increased. This realizes aeration and purification of river water. In the present embodiment, the notches 2 and 2 formed in the river banks 1 and 1 make the width of the river equal from the river bottom to the water surface, so that air bubbles from the air diffuser 3 disposed on the entire width of the river bottom are reduced. The belt extends to every corner in the width direction of the river, and the aeration efficiency is improved. Further, since the air diffuser tube 3 of the present embodiment has a large number of air diffusion holes 7 in the circumferential direction and the longitudinal axis direction on the entire peripheral surface or the partial peripheral surface of the peripheral wall, the air is exhausted from each of the air diffusion holes 7. Since a band of bubbles is formed in the river water at a high density in a planar manner, the aeration efficiency is further improved.
【００１０】なお、本発明は上述した一実施例に限定さ
れるものではなく、要旨を変更しない範囲で種々の変形
または応用が可能である。例えば、上記実施例では、河
川の横幅を川底から水面にかけて等しくするような幅の
切欠きを堤に形成したが、この切欠きによって堤の耐水
圧性能が低下し安全基準を下回る等の場合には、該安全
基準を確保しつつ可能な限り川底の幅を拡大するように
適宜切欠き幅を設定すればよい。この場合であっても、
川底の幅が拡大された分、従来より散気曝気し得る範囲
が広がり、曝気効率向上という本発明の効果は達成され
る。また、散気管から放出された気泡の帯が浮上する水
面部分には、水中及び水面に浮遊するゴミが集まり易い
ため、その部分にゴミ取り施設や凝集剤散布施設等を併
設し、曝気と併せて河川を浄化することも可能である。The present invention is not limited to the above-described embodiment, and various modifications or applications can be made without changing the gist. For example, in the above embodiment, a notch having a width equal to the width of the river from the river bottom to the water surface is formed in the embankment.However, when the notch reduces the water pressure resistance of the embankment and falls below the safety standard, etc. The notch width may be appropriately set so as to increase the width of the river bottom as much as possible while ensuring the safety standard. Even in this case,
As the width of the riverbed is increased, the range in which aeration and aeration can be performed is wider than before, and the effect of the present invention of improving aeration efficiency is achieved. In addition, garbage that floats on the water and on the water surface is likely to collect on the surface of the water where the band of air bubbles released from the air diffuser rises. It is also possible to purify rivers.
【００１１】[0011]
【発明の効果】以上説明したように、本発明の河川曝気
施設によれば、従来施設では不十分であった河川両脇部
分でも十分な曝気を行え、しかも散気管から放出される
各気泡の帯を狭小間隔で形成できるので、従来に比べ少
ない散気量で効率的に河川の曝気ができ、運転及び設備
コスト面において経済的である。As described above, according to the river aeration facility of the present invention, sufficient aeration can be performed on both sides of the river, which was insufficient with the conventional facilities, and the air bubbles emitted from the air diffuser tube are also reduced. Since the belts can be formed at narrow intervals, the river can be efficiently aerated with a smaller amount of air diffusion than in the past, which is economical in terms of operation and equipment costs.
【図１】本発明の一実施例に係る河川の曝気施設を示す
正面断面図である。FIG. 1 is a front sectional view showing a river aeration facility according to an embodiment of the present invention.
【図２】同施設の外観を示す斜視図である。FIG. 2 is a perspective view showing an appearance of the facility.
【図３】同施設の構成部材である散気管の一部を拡大し
て示す正面図である。FIG. 3 is an enlarged front view showing a part of an air diffuser which is a constituent member of the facility.
【図４】同じく側面断面図である。FIG. 4 is a side sectional view of the same.
【図５】同施設による河川の曝気状況を示す側面断面図
である。FIG. 5 is a side sectional view showing the state of aeration of a river by the facility.
【図６】従来の河川曝気施設を示す正面断面図である。FIG. 6 is a front sectional view showing a conventional river aeration facility.
１ 堤 ２ 切欠き ３ 散気管 ５ 空気供給源 ７ 散気孔 DESCRIPTION OF SYMBOLS 1 Dike 2 Notch 3 Air diffuser 5 Air supply source 7 Air diffuser
Claims (1)
施設において、河川の川底の横幅を拡大するために、河
川の両側の堤に形成された切欠きと、前記切欠き間に配
設されると共に、周壁の全周または部分的周面に多数の
散気孔を備えた散気管と、前記散気管に接続される空気
供給源とを備え、拡大した川底の全幅にわたって曝気す
るように構成されていることを特徴とする曝気施設。1. An aeration facility for a river provided with a dike having a slope, a notch formed in a dike on both sides of the river, and a cutout formed between the notches in order to enlarge a lateral width of a river bottom of the river. And an air supply source provided with a large number of air diffusion holes on the entire or partial peripheral surface of the peripheral wall, and an air supply source connected to the air diffusion tube, and configured to aerate over the entire width of the enlarged riverbed. An aeration facility characterized by being carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3907794A JP2720287B2 (en) | 1994-02-14 | 1994-02-14 | River aeration facilities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3907794A JP2720287B2 (en) | 1994-02-14 | 1994-02-14 | River aeration facilities |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07222995A JPH07222995A (en) | 1995-08-22 |
| JP2720287B2 true JP2720287B2 (en) | 1998-03-04 |
Family
ID=12543054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3907794A Expired - Lifetime JP2720287B2 (en) | 1994-02-14 | 1994-02-14 | River aeration facilities |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2720287B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100578050B1 (en) * | 2005-05-16 | 2006-05-12 | 이바도 | Treating facility for small river water |
| JP6308062B2 (en) * | 2013-09-26 | 2018-04-11 | 三菱ケミカル株式会社 | Air diffuser and water treatment device |
| CN108609771A (en) * | 2018-05-08 | 2018-10-02 | 福建省蓝深环保技术股份有限公司 | A kind of river regulation system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4846143A (en) * | 1971-10-15 | 1973-07-02 | ||
| JPS49108634U (en) * | 1973-01-11 | 1974-09-17 | ||
| JPS60248292A (en) * | 1984-02-27 | 1985-12-07 | Yoshinori Matsuki | Method and apparatus for purifying water of river and lake and seawater |
| JPS63229133A (en) * | 1986-10-02 | 1988-09-26 | Ube Ind Ltd | Gas-liquid contacting device |
-
1994
- 1994-02-14 JP JP3907794A patent/JP2720287B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07222995A (en) | 1995-08-22 |
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