JP2020011184A - Water quality improvement device - Google Patents

Water quality improvement device Download PDF

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JP2020011184A
JP2020011184A JP2018133939A JP2018133939A JP2020011184A JP 2020011184 A JP2020011184 A JP 2020011184A JP 2018133939 A JP2018133939 A JP 2018133939A JP 2018133939 A JP2018133939 A JP 2018133939A JP 2020011184 A JP2020011184 A JP 2020011184A
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water quality
quality improvement
water
case
improvement device
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JP7120542B2 (en
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康宏 荒木
Yasuhiro Araki
康宏 荒木
利光 東
Toshimitsu Azuma
利光 東
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Araki Manufacturing Co Ltd
Suna Co Ltd
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Araki Manufacturing Co Ltd
Suna Co Ltd
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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
    • 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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Abstract

To provide a water quality improvement device having excellent energy conservation and easily achieving modification of a fluid flowing in a water channel.SOLUTION: The device is equipped with a bottomed cylindrical case 1 fixed so as to align with the inside of a sidewall of a water channel and provided with a water conduction hole 3 and a water quality conditioner 2 accommodated and supported in the case 1, wherein a fluid conducted in the water channel is configured to contact with the water quality conditioner 2 via the water conduction hole 3. The water quality conditioner 2 may comprise a chelate iron generating material; in such a case, the chelate iron generating material may be those containing iron, carbon and citric acid.SELECTED DRAWING: Figure 1

Description

本発明は、例えば、水路を流れる流体の改質に用いられる水質改良装置に関する。   The present invention relates to a water quality improvement device used for, for example, reforming a fluid flowing through a water channel.

例えば、下水処理設備（下水管、マンホールポンプ場、下水処理場等）では、局所的に硫化水素が発生する場合があり、硫化水素はコンクリートの腐食や悪臭の原因となる。そして、下水の嫌気状態の解消（酸素溶存率の上昇）は硫化水素対策となることから、下水中への空気供給は有効な手段の一つと考えられている（特許文献１）。   For example, in a sewage treatment facility (a sewage pipe, a manhole pumping station, a sewage treatment plant, and the like), hydrogen sulfide may be locally generated, and the hydrogen sulfide causes corrosion and odor of concrete. Since the elimination of the anaerobic state of the sewage (increase in the oxygen dissolution rate) is a measure against hydrogen sulfide, supplying air to the sewage is considered to be one of effective means (Patent Document 1).

特開平１０−１８０２９６号公報JP-A-10-180296

しかし、下水中に空気を供給するための設備は比較的大掛かりとなる上、空気供給のためのポンプの駆動には電力が必要でもあり、斯かる設備の導入は不経済である。また、下水中に大きな泡の状態で空気を供給すると下水への酸素の溶存率が低下するので、なるべく細かい泡にするのが好ましいが、そのために空気の供給口を小さくすると、下水中の不純物で供給口が詰まり易くなってメンテナンスの手間が増えるという問題もある。すなわち、下水中に空気を供給して嫌気状態を解消し続けるのは容易ではない。また、空気源には駆動する動力を必要とするため省エネルギーに逆行するものである。   However, equipment for supplying air into sewage is relatively large-scale, and power is required to drive a pump for air supply, and introduction of such equipment is uneconomical. Also, if air is supplied in the form of large bubbles into the sewage, the oxygen dissolution rate in the sewage will decrease, so it is preferable to make the bubbles as fine as possible. Therefore, there is also a problem that the supply port is easily clogged and maintenance work is increased. That is, it is not easy to continuously supply the air to the sewage and eliminate the anaerobic state. In addition, since the air source requires a driving power, it is counter to energy saving.

本発明は上述の事柄に留意してなされたもので、その目的は、省エネルギー性に優れながら、水路を流れる流体の改質を簡便に実現することのできる水質改良装置を提供することにある。   The present invention has been made in view of the above-mentioned matters, and an object of the present invention is to provide a water quality improvement device which is excellent in energy saving and can easily realize reforming of a fluid flowing in a water channel.

上記目的を達成するために、本発明に係る水質改良装置は、水路の側壁内部に沿うように固定され、通水穴が設けられた有底筒状のケースと、前記ケース内に収容保持される水質改良材とを具備し、前記水路を流れる流体が前記通水穴を通じて前記水質改良材に接触するように構成されている（請求項１）。   In order to achieve the above object, a water quality improvement device according to the present invention is fixed along a side wall of a water channel, and has a bottomed cylindrical case provided with a water passage hole, and is housed and held in the case. And a fluid flowing through the water channel is configured to contact the water quality improving material through the water passage hole (claim 1).

上記水質改良装置において、前記水質改良材はキレート鉄発生材であってもよく（請求項２）、この場合、前記キレート鉄発生材は、鉄、炭素及びクエン酸を含有するものとすることができる（請求項３）。   In the water quality improvement device, the water quality improvement material may be a chelated iron generating material (claim 2). In this case, the chelated iron generating material may include iron, carbon, and citric acid. (Claim 3).

また、上記水質改良装置において、前記流体は下水でもよい（請求項４）。   In the water quality improvement device, the fluid may be sewage.

上記水質改良装置において、前記ケース内に出し入れ可能に収容される複数の穴あき小ケースを具備し、前記水質改良材は各小ケースに収容されてもよい（請求項５）。   The water quality improving device may include a plurality of small perforated cases accommodated in the case so as to be able to be taken in and out of the case, and the water quality improving material may be accommodated in each small case.

本願発明では、省エネルギー性に優れながら、水路を流れる流体の改質を簡便に実現することのできる水質改良装置が得られる。   ADVANTAGE OF THE INVENTION According to this invention, the water quality improvement apparatus which can implement | achieve easily the reforming of the fluid which flows through a water channel, while being excellent in energy saving is obtained.

すなわち、本願の各請求項に係る発明の水質改良装置では、構造上、その設置を簡便に行える上、水路を流れる流体の流速は中央ほど大きく、側壁に近づくほど小さくなるから、水質改良装置に加わる下水からの力はそれだけ軽減され、側壁内部に沿わせる水質改良装置は長寿命化することにもなる。また、本発明の水質改良装置は、動力が不要であり、省エネルギー性に優れたものとなる。   That is, in the water quality improvement device of the invention according to each claim of the present application, the structure can be easily installed, and the flow velocity of the fluid flowing through the water channel becomes larger toward the center and becomes smaller as approaching the side wall. The applied sewage power is reduced accordingly, and the water quality improvement device along the inside of the side wall has a longer life. In addition, the water quality improvement device of the present invention does not require power and is excellent in energy saving.

請求項２、３に係る発明の水質改良装置では、水質改良材からキレート鉄がイオンの状態を保持しながら恒常的に溶出し、流体中に発生した硫化物を硫化鉄として固定することにより、流体における硫化水素の発生が抑制されることになる。   In the water quality improvement device of the invention according to claims 2 and 3, the chelate iron is constantly eluted from the water quality improvement material while maintaining the ionic state, and the sulfide generated in the fluid is fixed as iron sulfide. Generation of hydrogen sulfide in the fluid is suppressed.

請求項４に係る発明の水質改良装置では、例えば下水処理設備における下水の改質を簡便に行うことができる。   In the water quality improvement device of the invention according to claim 4, for example, the sewage reforming in the sewage treatment facility can be easily performed.

請求項５に係る発明の水質改良装置では、水質改良材の交換や補充、状態の確認等を容易に行うことができるようになる。   In the water quality improvement device of the invention according to claim 5, it becomes possible to easily exchange and replenish the water quality improvement material, check the state, and the like.

（Ａ）は本発明の一実施の形態に係る水質改良装置を設置した水路の構成を概略的に示す平面図、（Ｂ）は（Ａ）のＸ−Ｘ線断面図である。(A) is a top view which shows roughly the structure of the water channel which installed the water quality improvement apparatus which concerns on one Embodiment of this invention, (B) is XX sectional drawing of (A). （Ａ）は図１（Ａ）のＹ−Ｙ線断面図、（Ｂ）は（Ａ）のａ部底面図である。1A is a sectional view taken along line YY of FIG. 1A, and FIG. 1B is a bottom view of a part a of FIG. （Ａ）〜（Ｃ）は本発明の変形例に係る小ケースの構成を概略的に示す平面図、縦断端面図及び底面図である。(A)-(C) are the top view, the longitudinal end view, and the bottom view which show roughly the structure of the small case which concerns on the modification of this invention. 前記小ケースの変形例を概略的に示す斜視図である。It is a perspective view which shows the modification of the said small case schematically. （Ａ）は前記水質改良装置をマンホールポンプに設置した例を概略的に示す平面図、（Ｂ）及び（Ｃ）は（Ａ）のＢ−Ｂ線断面図及びＣ−Ｃ線断面図である。(A) is a plan view schematically showing an example in which the water quality improvement device is installed in a manhole pump, and (B) and (C) are a BB line sectional view and a CC line sectional view of (A). .

本発明の実施の形態について図面を参照しながら以下に説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１（Ａ）及び（Ｂ）、図２（Ａ）及び（Ｂ）に示す水質改良装置は、下水（流体の一例）の流れる沈砂池（抽水所）を構成する水路に設置され、硫化水素の発生を抑制するためのものであり、有底筒状の中空のケース１と、ケース１内に収容保持される多数の塊状の水質改良材２とを具備する。なお、図１（Ｂ）及び図２（Ａ）では、ケース１の一部を切断し、ケース１内に収容された水質改良材２を表している。   The water quality improvement device shown in FIGS. 1A and 1B and FIGS. 2A and 2B is installed in a channel forming a sand basin (drainage station) through which sewage (an example of fluid) flows, and is provided with hydrogen sulfide. It is provided with a hollow cylindrical case 1 having a bottom and a large number of massive water quality improving materials 2 housed and held in the case 1. 1 (B) and FIG. 2 (A), a part of the case 1 is cut to show the water quality improving material 2 accommodated in the case 1.

ケース１は、筒状（本例では円筒状であるが、四角筒、三角筒等の多角筒状、楕円筒状その他の筒状でもよく、断面に湾曲部分と直線部分の両方が表れるような筒状でもよい。また、例えば四角筒状には、矩形、菱形、平行四辺形、台形等の四角形の辺（縁）を描くような断面形状を持つものが含まれる。）の部材を複数繋ぎ合わせて構成されており、適宜の部材により、水路の側壁内部に沿う直立姿勢（下水の流れる方向に垂直となる姿勢）で固定される。図示例では、四つのケース１が設置されている。そして、ケース１の下部（例えば計画高水位Ｈ．Ｗ．Ｌに相当する位置付近から下側に位置する側面及び底面）には多数の通水穴３（例えば直径１０ｍｍ程度の貫通孔）が設けられている。これにより、水路を流れる下水が通水穴３を通じて水質改良材２に接触する。   The case 1 is cylindrical (in this example, cylindrical, but may be polygonal, such as a square tube, a triangular tube, an elliptical tube, or any other tube, and may have both a curved portion and a straight portion in its cross section. In addition, for example, a square tubular shape includes a plurality of members having a cross-sectional shape that draws a rectangular side (edge) such as a rectangle, a rhombus, a parallelogram, a trapezoid, etc.). It is fixed by an appropriate member in an upright posture (a posture perpendicular to the direction in which the sewage flows) along the inside of the side wall of the water channel. In the illustrated example, four cases 1 are provided. A large number of water passage holes 3 (for example, through holes having a diameter of about 10 mm) are provided in a lower portion of the case 1 (for example, a side surface and a bottom surface located below from a position corresponding to the planned high water level HWL). Have been. Thereby, the sewage flowing through the water channel contacts the water quality improving material 2 through the water passage hole 3.

なお、図２（Ｂ）に示すように、ケース１の底面は、通水穴３を有するように例えばパンチングメタル（又は、多孔板、グレーチング等の底部を一部開放するような底板）により構成され、さらにこの底面から下方に複数の脚部４を延ばし、底面の通水穴３からもケース１内に下水が効率よく流入するように構成してある。   As shown in FIG. 2 (B), the bottom surface of the case 1 is made of, for example, a punched metal (or a bottom plate such as a perforated plate or a grating that partially opens the bottom) so as to have the water passage hole 3. Further, a plurality of legs 4 are extended downward from the bottom surface so that sewage can efficiently flow into the case 1 from the water passage hole 3 on the bottom surface.

本例の水質改良材２はキレート鉄発生材であり、鉄（例えば鉄粉）、炭素（例えば植物炭）及びクエン酸（キレート剤の一例）を含有する。具体的には、これらの材料をバインダー（例えば洗濯糊や木工用ボンド）と共に混ぜて例えば球状にしたものを水質改良材２として用いることが考えられる。なお、水質改良材２は、通水穴３を通らない大きさとする。   The water quality improving material 2 of this example is a chelated iron generating material, and contains iron (eg, iron powder), carbon (eg, vegetable charcoal), and citric acid (an example of a chelating agent). Specifically, it is conceivable that these materials are mixed with a binder (for example, a laundry paste or a bond for woodworking) and, for example, a spherical material is used as the water quality improving material 2. The water quality improving material 2 has a size that does not pass through the water hole 3.

そして、水路に対する水質改良装置の設置は、先にケース１のみを水路の側壁内部に固定した後、このケース１の上方開口から水質改良材２を投入することにより行ってもよいし、先に水質改良材２をケース１に収容し、水質改良装置を完成した後、水路の側壁内部に固定するようにしてもよい。   The water quality improvement device may be installed in the waterway by first fixing only the case 1 inside the side wall of the waterway and then charging the water quality improvement material 2 from the upper opening of the case 1. After the water quality improving material 2 is accommodated in the case 1 and the water quality improving device is completed, it may be fixed inside the side wall of the water channel.

以上の構成からなる水質改良装置では、水路を流れる下水はケース１内の水質改良材２に接触するので、水質改良材２からキレート鉄がイオンの状態を保持しながら恒常的に溶出し、下水中に発生した硫化物を硫化鉄として固定することにより、硫化水素の発生が抑制されることになる。   In the water quality improvement device having the above configuration, the sewage flowing through the water channel comes into contact with the water quality improvement material 2 in the case 1, so that the chelate iron is constantly eluted from the water quality improvement material 2 while maintaining the ionic state, By fixing the sulfide generated therein as iron sulfide, the generation of hydrogen sulfide is suppressed.

しかも、その構造上、水質改良装置の設置は簡便に行える。特に、水路を流れる下水の流速は中央ほど大きく、側壁に近づくほど小さくなるから、側壁内部に沿わせる水質改良装置に加わる下水からの力はそれだけ軽減され、水質改良装置は長寿命化することにもなる。また、本例の水質改良装置は、動力が不要であり、省エネルギー性に優れたものともなっている。   Moreover, due to its structure, the installation of the water quality improvement device can be easily performed. In particular, the flow velocity of the sewage flowing through the water channel is larger in the center and becomes smaller as it gets closer to the side wall, so the power from the sewage applied to the water quality improvement device along the side wall is reduced accordingly, and the water quality improvement device has a longer life. Also. Further, the water quality improvement device of this example does not require power, and is excellent in energy saving.

ちなみに、図１（Ａ）及び（Ｂ）において、５は流入ゲート、６はポンプであり、下水は図の右側から左側に向かって流れる。   Incidentally, in FIGS. 1A and 1B, 5 is an inflow gate, 6 is a pump, and sewage flows from the right side to the left side of the figure.

また、本例の水質改良装置は、自然流下形式の設備（管路）、圧送形式の設備（管路）の何れにも用いることが可能であり、各構成部材の素材は、使用環境に適したものを適宜に選択すればよい。   In addition, the water quality improvement device of this example can be used for both a natural flow type facility (pipe) and a pumping type facility (pipe), and the material of each component is suitable for the usage environment. What is necessary is just to select suitably.

なお、本発明は、上記の実施の形態に何ら限定されず、本発明の要旨を逸脱しない範囲において種々に変形して実施し得ることは勿論である。例えば、以下のような変形例を挙げることができる。   It should be noted that the present invention is not limited to the above-described embodiment at all, and it is needless to say that various modifications can be made without departing from the spirit of the present invention. For example, the following modifications can be given.

図１及び図２の例では、水路の幅をあまり狭めないようにするために、一つの水路の両側に設ける二つの水質改良装置の位置をずらしているが、特に問題が無ければ、一つの水路において互いに対向する位置に二つの水質改良装置を配してもよい。なお、水路に設置する水質改良装置の数や大きさ等は、水路の深さや幅、目標とする水質改良の内容や下水の水質、想定される下水の流量等に応じて適宜に決めればよい。   In the examples of FIGS. 1 and 2, the positions of the two water quality improvement devices provided on both sides of one waterway are shifted in order not to make the width of the waterway too small. Two water quality improvement devices may be arranged at positions facing each other in the water channel. The number and size of the water quality improvement devices installed in the water channel may be appropriately determined according to the depth and width of the water channel, the content of the target water quality improvement, the quality of the sewage, the expected flow rate of the sewage, and the like. .

図１及び図２の例では、ケース１に水質改良材２を直接投入するが、これに限らず、例えば、ケース１内に出し入れ可能に収容される複数の有底筒状の穴あき小ケース７（図３（Ａ）〜（Ｃ）参照）を具備し、水質改良材２を各小ケース７内にその上方開口から収容するようにしてもよい。すなわち、小ケース７は、ケース１内に積み重ねた状態で収容可能に構成され、かつ、側面及び底面に通水穴３が多数設けられている。また、小ケース７の上部には把手８が設けられ、適宜の道具を把手８に引っ掛けて持ち上げればケース１から小ケース７を取り出すことができるように構成されている。この把手８の構成は種々に変形可能であり、例えば図４に示すように、小ケース７の上方開口に架設した十字型部分を把手８としてもよい。ただし、小ケース７をケース１から取り出すための構成は、把手８を利用するものに限らず、例えばチェーンブロックにより各小ケース７を順次引き上げることができるように構成することも考えられる。   In the examples of FIGS. 1 and 2, the water quality improving material 2 is directly charged into the case 1. However, the present invention is not limited thereto. 7 (see FIGS. 3 (A) to 3 (C)), and the water quality improving material 2 may be accommodated in each small case 7 from its upper opening. That is, the small case 7 is configured to be able to be accommodated in a stacked state in the case 1, and has a large number of water passage holes 3 on the side and bottom surfaces. A handle 8 is provided on the upper part of the small case 7 so that the small case 7 can be taken out of the case 1 by hooking a suitable tool on the handle 8 and lifting the handle. The configuration of the handle 8 can be variously modified. For example, as shown in FIG. 4, a cross-shaped portion provided on the upper opening of the small case 7 may be used as the handle 8. However, the configuration for removing the small case 7 from the case 1 is not limited to the configuration using the handle 8, but may be configured so that each small case 7 can be sequentially pulled up by a chain block, for example.

このように、小ケース７を用いるようにすれば、水質改良材２の交換や補充、状態の確認等を容易に行うことができるようになる。   As described above, if the small case 7 is used, replacement and replenishment of the water quality improving material 2, confirmation of the state, and the like can be easily performed.

図１、図２の例では、沈砂池を構成する水路に水質改良装置を設けているが、この水質改良装置は、下水管等、他の下水処理設備に設置することも可能であり、図５（Ａ）〜（Ｃ）に示すように、マンホールポンプ内に設置するようにしてもよい。ここで、図５（Ａ）〜（Ｃ）において、９〜１２は流入管、１３は水中汚水ポンプである。   In the examples of FIGS. 1 and 2, a water quality improvement device is provided in a water channel constituting a sand basin. However, the water quality improvement device can be installed in another sewage treatment facility such as a sewage pipe. As shown in FIGS. 5 (A) to 5 (C), they may be installed in a manhole pump. Here, in FIGS. 5A to 5C, 9 to 12 are inflow pipes, and 13 is a submerged sewage pump.

図１、図２の例では、ケース１を水路の側壁内部に沿う直立姿勢（下水の流れる方向に垂直となる姿勢）で固定しているが、これに限らず、例えば、ケース１を水路の側壁内部に沿う傾斜姿勢（下水の流れる方向と鋭角または鈍角をなす姿勢）で固定してもよい。この場合、ケース１において下水に浸漬する部分（下部）を増大させ、この部分に収容する水質改良材２の量を増やすことができる。   In the examples of FIGS. 1 and 2, the case 1 is fixed in an upright posture (a posture perpendicular to the direction of sewage flow) along the inside of the side wall of the water channel. However, the present invention is not limited to this. It may be fixed in an inclined posture along the inside of the side wall (a posture making an acute angle or an obtuse angle with the direction in which the sewage flows). In this case, the part (lower part) immersed in the sewage in the case 1 can be increased, and the amount of the water quality improving material 2 accommodated in this part can be increased.

また、本発明の水質改良装置は、水質改良材２の構成を変更することにより、種々の水質改良に対応することができるのであり、これにより、下水処理設備以外の設備にも適用可能である。   In addition, the water quality improvement device of the present invention can cope with various water quality improvements by changing the configuration of the water quality improvement material 2, and is thereby applicable to equipment other than the sewage treatment equipment. .

なお、上記変形例どうしを適宜組み合わせてもよいことはいうまでもない。   It goes without saying that the above-mentioned modifications may be combined as appropriate.

１ ケース
２ 水質改良材
３ 通水穴
４ 脚部
５ ゲート
６ ポンプ
７ 小ケース
８ フック
９ 流入管
１０ 流入管
１１ 流入管
１２ 流入管
１３ 水中汚水ポンプ

DESCRIPTION OF SYMBOLS 1 Case 2 Water quality improvement material 3 Water passage hole 4 Leg 5 Gate 6 Pump 7 Small case 8 Hook 9 Inflow pipe 10 Inflow pipe 11 Inflow pipe 12 Inflow pipe 13 Submerged sewage pump

Claims (5)

水路の側壁内部に沿うように固定され、通水穴が設けられた有底筒状のケースと、
前記ケース内に収容保持される水質改良材とを具備し、
前記水路を流れる流体が前記通水穴を通じて前記水質改良材に接触するように構成されている水質改良装置。 A bottomed cylindrical case fixed along the side wall of the water channel and provided with water holes,
Comprising a water quality improving material housed and held in the case,
A water quality improvement device configured to allow a fluid flowing through the water channel to contact the water quality improvement material through the water passage hole. 前記水質改良材はキレート鉄発生材である請求項１に記載の水質改良装置。   The water quality improvement device according to claim 1, wherein the water quality improvement material is a chelated iron generating material. 前記キレート鉄発生材は、鉄、炭素及びクエン酸を含有する請求項２に記載の水質改良装置。   The water quality improvement device according to claim 2, wherein the chelated iron generating material contains iron, carbon, and citric acid. 前記流体は下水である請求項１〜３の何れか一項に記載の水質改良装置。   The water quality improvement device according to any one of claims 1 to 3, wherein the fluid is sewage. 前記ケース内に出し入れ可能に収容される複数の穴あき小ケースを具備し、前記水質改良材は各小ケースに収容される請求項１〜４の何れか一項に記載の水質改良装置。

The water quality improvement device according to any one of claims 1 to 4, further comprising a plurality of small perforated cases accommodated in the case so as to be able to be taken in and out of the case, wherein the water quality improvement material is accommodated in each small case.

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07328650A (en) * 1994-06-07 1995-12-19 Yoshihiko Inamoto Method for improving water quality in waterway and device for improving water quality
JPH0947767A (en) * 1995-08-08 1997-02-18 Yasunori Marubayashi Water quality improving device
US6716357B1 (en) * 1999-02-19 2004-04-06 Japan Science And Technology Corporation Method of removing phosphoric acid containting wastewater
JP2010242075A (en) * 2009-03-17 2010-10-28 Hiroshima Univ Iron chelate generator and method for using the same
US8251080B1 (en) * 2008-06-06 2012-08-28 Automation and Control Services, Inc. Fluid treatment canister and system
JP2017159260A (en) * 2016-03-10 2017-09-14 日の丸カーボテクノ株式会社 Water quality improvement material, method for producing water quality improvement material, and water quality improvement method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07328650A (en) * 1994-06-07 1995-12-19 Yoshihiko Inamoto Method for improving water quality in waterway and device for improving water quality
JPH0947767A (en) * 1995-08-08 1997-02-18 Yasunori Marubayashi Water quality improving device
US6716357B1 (en) * 1999-02-19 2004-04-06 Japan Science And Technology Corporation Method of removing phosphoric acid containting wastewater
US8251080B1 (en) * 2008-06-06 2012-08-28 Automation and Control Services, Inc. Fluid treatment canister and system
JP2010242075A (en) * 2009-03-17 2010-10-28 Hiroshima Univ Iron chelate generator and method for using the same
JP2017159260A (en) * 2016-03-10 2017-09-14 日の丸カーボテクノ株式会社 Water quality improvement material, method for producing water quality improvement material, and water quality improvement method

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