JP4107486B2

JP4107486B2 - Water treatment equipment

Info

Publication number: JP4107486B2
Application number: JP2002334384A
Authority: JP
Inventors: 勝之深川; 哲彦藤里; 袈裟義羽田野
Original assignee: Yamaguchi Technology Licensing Organization Ltd
Current assignee: Yamaguchi Technology Licensing Organization Ltd
Priority date: 2002-10-11
Filing date: 2002-10-11
Publication date: 2008-06-25
Anticipated expiration: 2022-10-11
Also published as: JP2004130290A

Description

【０００１】
【発明の属する技術分野】
本発明は、ダムや湖沼内などの水中に浮遊する、微細な浮遊物やアオコ等を回収し、環境を再生することのできる水処理装置に関する。
【０００２】
【従来の技術】
近年、ダムや湖沼等のアオコ退治に超音波を照射したり、湖面に浮き構造体を浮かべて、直接アオコを吸引回収し凝集沈殿剤で濃縮して回収する方法や、水中に散気管を配置し気体を吹き込み、気泡を発生させることで溶存酸素を増加させ、好気性菌等で水の浄化を行う等の、種々の水処理装置が研究、開発されている。
【０００３】
【発明が解決しようとする課題】
しかしながら、上記従来の技術は以下のような課題を有してした。
（１）超音波を直接アオコに照射しキャビテーション作用で退治する方法は，脱気を伴い水中の溶存酸素濃度が下がり、他の水生生物には良くなく、又、浮遊物及びアオコの死骸等を回収しなければ、富栄養化分をダムや湖沼内から取り除いた事にならないので意味がなく、又、大量の水処理には効率が悪く実用向きでないという課題があった。
（２）湖水表面に浮遊するアオコを、浮き構造体に乗せた回収機で回収し、凝集剤で固める方法は、湖水表面だけ回収するので水中の浮遊物は除く事ができず、又、薬剤を使用するので、環境に悪影響を与えるという課題があった。
（３）コンプレッサー等で圧力気体を作り、水中に配置した散気管に気体を送り、気泡を発生させて溶存酸素量を増加させ、好気性菌に有機物を分解させる方法は、気泡の上昇速度が速く周辺の液体を巻き込み上昇させ、大きな対流が起き浮遊物混じりの水質になる為、飲料水を取水するダムでは、取水口から遠く離れた所でしか稼動できず、又、富栄養化分を取り除く事にならなく多大なエネルギーコストの割に、水質は良くならないという問題を有していた。
【０００４】
本発明は上記の課題を解決するもので、ダム、湖沼内の水中に浮遊する浮遊物を微細気泡を利用し濃縮して吸引し、省エネルギーでダム、湖沼等の外に確実に除去し、又、除去した浮遊物は有機物であり、回収し濃縮してコンポスト等に再利用できる、エネルギーコストを掛けずに、効率良く大量に浄化できる水処理装置を提供することを目的とする。
【０００５】
【課題を解決するための手段】
本発明に記載の水処理装置は、ダムや湖沼内等の、水中に微細気泡を発生させ、その微細気泡を水中の浮遊物に付着させ、浮力増大により表面水域に浮上させて濃縮し集める手段として、水中に配置された微細気泡発生器と、表面水域に集められた浮遊物の表面水を、水頭差（サイホンも含む）による位置エネルギーを利用して、吸引回収する事のできる回収部とを備えている水処理装置において、前記回収部によって回収された浮遊物混合水を、水頭差による位置エネルギーで下流側に流し圧力水にすることができる送水管と、下流側底に配置された水槽内で前記送水管を上向きにした上向き送水管と、それに連接された二次微細気泡発生器と、前記二次微細気泡発生器に連接された手前の前記上向き送水管に気体を圧入できる孔を設けた気体圧入孔と、コンプレッサー等で前記上向き送水管内の水圧より高い圧力気体を作り、その気体を圧入パイプを介して前記気体圧入孔から気体量を調整し供給する事で、前記水槽内で発生する微細気泡の気泡径及び気泡量を調整することができる気体供給部と、前記水槽内で発生した前記微細気泡が浮遊物に付着し、浮上分離することで水槽表面水域に浮遊物の二次濃縮層ができ、この前記二次濃縮層を回収する時に水位及び水量を放出調整弁で調整する事のできる浮遊物分離回収槽とを備えて構成されている。
この構成によって、以下の作用を有する。
（１）一次濃縮手段としての微細気泡発生器から発生した微細気泡が、水中の動物・植物性プランクトン及び死骸等や、落ち葉等の水中浮遊物に付着し、浮力増大により表面水域に上昇させる事ができる。また微細気泡は非常に上昇速度が遅いので、所望に応じて表面水域から微細気泡発生器までの間隔をあけて、水中における微細気泡の滞留時間を長くする事で、浮遊物に付着する確率を上げる事ができる。この事によって大量の水にも対応することができる。
（２）回収部を備えているので、表面水域に浮上し濃縮された浮遊物等の有機物を、確実にダム、湖沼外に除去できる。また水頭差による位置エネルギーを利用し吸引回収するので省エネルギーで連続稼動に適している。
（３）水頭差による位置エネルギーを利用するので、１０ｍにつき０．１Ｍｐａの圧力が得られ、例えば水頭差５０ｍの下流側の送水管内では０．５Ｍｐａの圧力水を作れるので、浮遊物を浮上分離させるのに十分な微細気泡を、省エネルギーで発生させる事ができる。
（４）水槽内の上向き送水管に気体を供給する気体圧入孔があるので、気体が送水管内を逆流することがなく二次微細気泡発生器に混入される。よってサイホンを利用した取水方法でも安定して連続稼動できる。
（５）気体供給部で気体混入量を調整できるので、水槽内で微細気泡が浮遊物に付着し浮上する状態を目視で確認しながら、最適な気泡径及び気泡量を調整することができる。
（６）水槽の表面水は浮遊物分離回収槽に向かって流れるので、放出量調整弁で処理水の放出量を調整する事によって、浮遊物分離回収槽へ流れる二次濃縮浮遊物層の水位水量を調整できるので、所望量の浮遊物を回収することができる。
【０００７】
【発明の実施の形態】
（実施の形態１）
本発明の実施の形態１における水処理装置について、以下図面を参照しながら説明する。
図１（ａ）は、本発明の実施の形態１の水処理装置の正面配置図であり、図１（ｂ）は、吸引取水方法にサイホン原理を利用した正面配置図である。
図１（ａ，ｂ）において、二次濃縮される部分は図２の正面拡大配置図で説明する。
１は実施の形態１の水処理装置、２は水中で微細気泡を発生させる微細気泡発生器、３は微細気泡発生器２から発生した水中の浮遊物に付着させ浮上させる微細気泡、４は浮遊物に微細気泡３が付着し浮力増加で表面水域に上昇した一次濃縮浮遊物層、５は浮き構造体に取り付けられ、表面水から所定の距離に沈められ所定量の表面水を吸引する事のできる回収部、６は吸引回収された表面水を下流側に送る送水管、７は浮き構造体の上に置かれた微細気泡３を発生させる為の、気体圧縮機や発電機等が配置された動力源コントロール部、１３は送水管が下流底で反転し上向きに向けられた上向き送水管、１４は微細気泡発生器に浮遊物混合圧力水を送り微細気泡を発生させ浮遊物を浮上させる水槽、１５は上向き送水管１３に取り付けられた二次微細気泡発生器、１６は二次微細気泡発生器１５に接続する直前の上向き送水管１３に気体を圧入させるために孔を空けた気体圧入孔、１７は圧力気体を気体圧入孔１６へ送る為の圧入パイプ、１８は圧力気体を作るコンプレッサー、１９は気体圧入量を調整し気泡径及び気泡量を調整できる気体圧入量調整弁、２０は二次微細気泡発生器１５より発生した二次微細気泡、２１は浮遊物に二次微細気泡２０が付着し水槽表面水域に浮上した二次浮遊物濃縮層、２２は水槽表面水域を吸い込む浮遊物分離回収槽、２３は二次微細気泡２０が浮遊物に付着し表面水域に浮上し分離する事によって、その下側に分離された処理水、２４は処理水２３の放出量を調整する事で浮遊物分離回収槽２２に流れ込む水量及び水位を調整できる放出量調整弁、２５は浮遊物分離回収槽２２から濾過布や細網等で集められたアオコ等の浮遊物で有る。
【０００８】
前記構成を有する水処理装置１の作動方法について説明する。
例えば、ダム湖面上に配置された浮き構造体の動力コントロール部７から、湖面下３０ｍに吊り下げられた微細気泡発生器２より１０〜４０μｍの微細気泡３を発生させ、水中の浮遊物に付着させ表面水域に上昇させる事ができる。この時、微細気泡３が表面水域に上昇到達するまでの滞留時間が長い程付着する可能性が高い、よって微細気泡３の径が小さい程上昇力が遅いので有利になる。
微細気泡３が付着した浮遊物は、浮力増加により表面水域に浮上し一次濃縮浮遊物層４を形成する、この一次濃縮浮遊物層４を吸引回収する為に、所定量の表面水を吸引できるように、ロート状のパイプを表面水より沈め浮き構造体に固定した回収部５から、水頭差を利用した位置エネルギーによる吸引力で送水管６を介して、ダム外へ確実に放出することができる。この送水管６を下流底に配置された水槽１４内で反転させて上向きにした、上向き送水管１３と二次微細気泡発生器１５を接続する事で、例えば、ダムの表面水からの水頭差が５０ｍ有るとすれば０．５Ｍｐａの圧力水が得られので、この時接続した手前の上向き送水管１３の気体圧入孔１６から、０．５Ｍｐａ以上の圧力気体をコンプレッサー１８で作り、気体圧入量調整弁１９で気体圧入量を調整して、圧入パイプ１７から圧入させることで、この上向き送水管１３内は圧力気液混合液になり、微細気泡発生器１５より噴射した浮遊物混合水中に二次微細気泡２０を発生させる事ができる。この事によって水槽１４内の浮遊物に二次微細気泡２０を付着させ、水槽表面水域に浮上させ二次浮遊物濃縮層２１を形成させる事ができる。この時水槽表面水は、浮遊物分離回収槽２２側へ向かって流れるので、水槽１４の下流放出側の放出量調整弁２４で、処理水２３の放出量を調整でき事によって、浮遊物分離回収槽２２へ流れ込む水位水量を変える事ができるので、所望に合わせて放出量調整弁２４で調整し、浮遊物を回収する事ができる。回収した浮遊物２５は水中に浮遊する動・植物プランクトン及び死骸等や落ち葉等の有機物なので、コンポスト等に利用できる。
【０００９】
図１（ｂ）において、堰堤壁に送水口がない場合、又は取り付けられない場合に、サイホン原理を利用して表面水域の濃縮浮遊物を吸引し、下流側に放出させる方法で、ここでは微細気泡を発生させ表面水域に濃縮浮遊物を浮上させる作用と、下流底での浮遊物を回収する作用は同じで有り省略する。
８は回収部５下部に送水管内の水が逆流しないように取り付けられた逆止弁、９はサイホンの原理を利用して取水するために、吸引側の送水管内を水で満たす為の汲み上げポンプ、１０は下流側の送水管内に水を満たす為に送水管内の空気を抜く空気弁、１１はサイホンが利用できる吸引側及び下流側の送水管内が水で満たされるまでの間を弁によって止めるサイホン弁、１２は下流側の送水管内最上部まで水を満たせる時に止める送水管弁である。
【００１０】
前記構成を有するサイホンの原理を利用した水処理装置１の作動方法について説明する。
まずサイホン弁１１を閉じて、汲み上げポンプ９の呼び水口から呼び水を吸引側の送水管内に入れる、この時回収部５下部の送水管に取り付けられた逆止弁８により、呼び水は止められるので、汲み上げポンプ９まで呼び水を満たす事ができる。この事によって汲み上げポンプ９を稼動させることができ、汲み上げポンプ９の吐出し口から下流側の送水管に送られた水は、下流底に取り付けられた送水管弁１２を閉じて送水管最上部の空気弁１０を開放する事で、汲み上げポンプ９の吐出し口までの送水管内に水を満たすことができる。これで空気弁１０を閉じ、汲み上げポンプ９を停止させてサイホン弁１１と送水管弁１２を開ければ、一次濃縮浮遊物４をサイホンの原理で吸引取水し下流側へ放出することができる。この一連の作動をセンサー及び電磁弁等を利用して電気的にコントロールさせる事もできる。
【００１１】
図３は、水中の浮遊物に微細気泡が付着し、表面水域に向かって浮上している様子を示した模式図である。
図４は、各気泡径（μｍ）の微細気泡が、浮力により上昇する終端速度（ｍｍ／ｓ）を実験して得られたデーターと計算値である。
【００１２】
実施の形態１の水処理装置は以上のように構成されているので、以下の作用を有する。
（ａ）浮遊物に微細気泡を付着させ浮上させる能力は、水中で発生する微細気泡の径や量及び、発生位置によって滞留時間が決まり、これを制御することができる。又、２４時間稼動する事で大量の水を浄化できるので適している。
（ｂ）水面上に濃縮された浮遊物を吸引回収し下流側に放出させるエネルギーや、下流底の水槽内で微細気泡を発生させるエネルギーは、水頭差による位置エネルギーを利用するので、２４時間稼動させても省エネルギーである。
（ｃ）水槽内の下流側の放出量調整弁によって、二次浮遊物濃縮層の水位水量が変えられるので、季節により増減する浮遊物の量や種類に対応できる。
（ｄ）堰堤壁から送水口が取れなくても、サイホンの原理を利用し表面水域の浮遊物を吸引回収できるので、ダム以外でも水頭差が有れば利用する事ができる。
【００１３】
【発明の効果】
本発明に記載の水処理装置によれば、以下のような効果を有する。
（ａ）水中で空気及び酸素等の気体を混入させて微細気泡を発生させるので、ダム、湖沼中の溶存酸素量が増え、生物にとって良好な環境にする事ができる。
（ｂ）現状のダムや湖沼等の水質に合わせて、表面水域に浮上した浮遊物の状況を見て、所望の水深と気泡量を決めて微細気泡を発生させる事ができる。
（ｃ）表面水域に浮上した浮遊物混合水層を、水頭差を利用した位置エネルギーで吸引回収するので、稼動ライニングコストが低く、また確実に浮遊物をダム、湖沼外に除去する事ができる。
（ｄ）サイホンの原理を利用して表面水域を吸引取水できるので、水頭差があれば堰堤壁に送水口がないダムや湖沼等にも適用できる。
（ｅ）ダム、湖沼外に放出された浮遊物混合水は、水頭差による位置エネルギーで下流底の水槽内に微細気泡を発生させる事ができるので、浮遊物混合水を処理水と濃縮浮遊物に分け回収することができるので、コンポスト等として有効的に再利用できるので経済的である。
【図面の簡単な説明】
【図１】（ａ）実施の形態１における水処理装置の正面配置図
（ｂ）サイホンの原理を利用し取水する正面配置図
【図２】二次濃縮される部分を拡大した正面配置図
【図３】水中の浮遊物に微細気泡が付着し浮上する模式図
【図４】各気泡径の微細気泡が上昇する終端速度
【符号の説明】
１実施の形態１の水処理装置
２微細気泡発生器
３微細気泡
４一次濃縮浮遊物層
５回収部
６送水管
７動力源コントロール部
８逆止弁
９汲み上げポンプ
１０空気弁
１１サイホン弁
１２送水管弁
１３上向き送水管
１４水槽
１５二次微細気泡発生器
１６気体圧入孔
１７圧入パイプ
１８コンプレッサー
１９気体圧入量調整弁
２０二次微細気泡
２１二次浮遊物濃縮層
２２浮遊物分離回収槽
２３処理水
２４放出量調整弁
２５浮遊物[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water treatment apparatus capable of recovering the environment by collecting fine suspended matters, blue sea cucumbers, etc. floating in water such as in dams and lakes.
[0002]
[Prior art]
In recent years, ultrasonic waves have been applied to extermination of blue sea breams such as dams and lakes, or floating structures have been floated on the surface of the lake. Various water treatment devices have been researched and developed, such as blowing gas and generating bubbles to increase dissolved oxygen and purify water with aerobic bacteria.
[0003]
[Problems to be solved by the invention]
However, the above conventional technique has the following problems.
(1) The method of irradiating aquatics directly with aquatic waves and extinguishing them by cavitation is not good for other aquatic organisms due to degassing and lowering the dissolved oxygen concentration in the water. If not collected, the eutrophication component would not be removed from the dam or lake, so there was no meaning. In addition, there was a problem that it was inefficient and unsuitable for large-scale water treatment.
(2) The method of recovering the water flounder floating on the surface of the lake water with a recovery machine placed on the floating structure and solidifying with the flocculant is only recovering the surface of the lake water, so the suspended matter in the water cannot be removed. Because of the use, there was a problem of adversely affecting the environment.
(3) The method of creating a pressure gas with a compressor, sending the gas to a diffuser pipe placed in water, generating bubbles, increasing the amount of dissolved oxygen, and decomposing organic matter into aerobic bacteria, Because the surrounding liquid is quickly involved and lifted, and large convection occurs and the water quality is mixed with suspended solids, the dam that takes drinking water can only be operated far away from the intake, and the eutrophication component There was a problem that the water quality was not improved for a large energy cost without being removed.
[0004]
The present invention solves the above-mentioned problems, and concentrates and sucks floating substances floating in the water in the dam and the lake using fine bubbles, and reliably removes them outside the dam and the lake with energy saving. The object of the present invention is to provide a water treatment device that can be purified and efficiently purified in large quantities without incurring energy costs.
[0005]
[Means for Solving the Problems]
The water treatment apparatus according to the present invention is a means for generating fine bubbles in water, such as in a dam or a lake, attaching the fine bubbles to suspended matter in the water, and floating and concentrating on the surface water area by increasing buoyancy. As a microbubble generator placed in the water, and a collection unit that can suck and collect the surface water of suspended matter collected in the surface water area using the potential energy due to the water head difference (including siphon) In the water treatment apparatus, the suspended water mixed water recovered by the recovery unit is arranged on the downstream bottom, and a water supply pipe that can flow into the downstream side with potential energy due to a head difference and turn into pressure water. An upward water supply pipe with the water supply pipe facing upward in the water tank, a secondary fine bubble generator connected to the upward water supply pipe, and a hole through which gas can be press-fitted into the upstream upward water supply pipe connected to the secondary fine bubble generator. Provided It is generated in the water tank by creating a pressure gas higher than the water pressure in the upward water supply pipe with a body pressure injection hole and a compressor, and adjusting the gas amount from the gas injection hole via the pressure injection pipe and supplying the gas. A gas supply unit that can adjust the bubble diameter and the amount of bubbles of fine bubbles, and the fine bubbles generated in the water tank adhere to the suspended matter and float and separate, thereby secondary concentration of the suspended matter in the surface water area of the aquarium And a suspended matter separation and recovery tank in which the water level and the amount of water can be adjusted with a discharge regulating valve when the secondary concentrated layer is recovered .
This configuration has the following effects.
(1) The fine bubbles generated from the fine bubble generator as the primary concentration means adhere to underwater animals, phytoplankton, dead bodies, etc., and suspended matters such as fallen leaves, and rise to the surface water area by increasing buoyancy. Can do. In addition, since the rising speed of microbubbles is very slow, the probability of adhering to suspended solids can be increased by increasing the residence time of microbubbles in water by increasing the interval from the surface water area to the microbubble generator as desired. Can be raised. This makes it possible to handle a large amount of water.
(2) Since a recovery unit is provided, organic matter such as suspended matter that has floated and concentrated in the surface water area can be reliably removed outside the dam or lake. In addition, it uses the potential energy due to the water head difference to perform suction collection, so it saves energy and is suitable for continuous operation.
(3) Since the potential energy due to the water head difference is used, a pressure of 0.1 Mpa can be obtained per 10 m. For example, 0.5 Mpa of pressure water can be produced in the water pipe downstream of the water head difference of 50 m. It is possible to generate enough fine bubbles to save energy.
(4) Since there is a gas press-fitting hole for supplying gas to the upward water pipe in the water tank, the gas is mixed into the secondary fine bubble generator without flowing back through the water pipe. Therefore, stable and continuous operation is possible even with water intake using a siphon.
(5) Since the gas mixing amount can be adjusted by the gas supply unit, it is possible to adjust the optimum bubble diameter and bubble amount while visually confirming the state in which the fine bubbles are attached to the suspended matter and float in the water tank.
(6) Since the surface water of the aquarium flows toward the suspended matter separation and recovery tank, the water level of the secondary concentrated suspended matter layer flowing to the suspended matter separation and recovery tank can be adjusted by adjusting the discharge amount of the treated water with the discharge amount adjustment valve. Since the amount of water can be adjusted, a desired amount of suspended matter can be recovered.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
(Embodiment 1)
The water treatment apparatus in Embodiment 1 of this invention is demonstrated referring drawings below.
Fig.1 (a) is a front arrangement | positioning figure of the water treatment apparatus of Embodiment 1 of this invention, FIG.1 (b) is a front arrangement | positioning figure using the siphon principle for the suction water intake method.
In FIG. 1 (a, b), the secondary concentrated portion will be described with reference to the enlarged front view of FIG.
DESCRIPTION OF SYMBOLS 1 is the water treatment apparatus of Embodiment 1, 2 is the fine bubble generator which generates a fine bubble in water, 3 is the fine bubble which adheres to the suspended matter in the water generated from the fine bubble generator 2, and floats 4 The primary concentrated suspended matter layer 5, which has been attached to the surface and has risen to the surface water area due to increased buoyancy, is attached to the floating structure, and is submerged at a predetermined distance from the surface water to suck a predetermined amount of surface water. A recovery section that can be used, 6 is a water pipe that sends the suctioned and recovered surface water to the downstream side, and 7 is a gas compressor or generator for generating fine bubbles 3 placed on the floating structure. The power source control section, 13 is an upward water supply pipe whose water pipe is inverted and directed upward at the bottom of the downstream, and 14 is a water tank that sends floating mixed pressure water to the fine bubble generator to generate fine bubbles and float the floating substances , 15 is attached to the upward water pipe 13 A secondary fine bubble generator 16 is a gas injection hole having a hole in order to inject gas into the upward water supply pipe 13 immediately before being connected to the secondary fine bubble generator 15, and 17 is a pressure gas into the gas injection hole 16. 18 is a compressor for producing pressurized gas, 19 is a gas injection amount adjusting valve capable of adjusting the gas injection amount and adjusting the bubble diameter and bubble amount, and 20 is a secondary generated by the secondary fine bubble generator 15. Fine bubbles, 21 is a secondary suspended matter concentration layer in which secondary fine bubbles 20 are attached to the suspended matter and floated on the surface of the aquarium surface, 22 is a suspended matter separation and recovery tank for sucking in the aquarium surface water region, and 23 is a secondary fine bubble 20 The treated water 24, which is attached to the suspended matter and floats to the surface water area and is separated, adjusts the discharge amount of the treated water 23 to adjust the amount and level of water flowing into the suspended matter separation / recovery tank 22. Adjustable release level Valve, 25 is a floating matter such as water bloom collected from suspended matter separation and recovery tank 22 by filter cloth and reticular like.
[0008]
A method for operating the water treatment apparatus 1 having the above-described configuration will be described.
For example, from the power control unit 7 of the floating structure disposed on the surface of the dam, the fine bubble 3 of 10 to 40 μm is generated from the fine bubble generator 2 suspended 30 m below the lake surface and adheres to the suspended matter in the water It can be raised to the surface water area. At this time, the longer the residence time until the fine bubbles 3 rise and reach the surface water region, the higher the possibility of adhesion. Therefore, the smaller the diameter of the fine bubbles 3, the slower the ascending force, which is advantageous.
The suspended matter to which the microbubbles 3 are attached rises to the surface water area due to an increase in buoyancy and forms a primary concentrated suspended matter layer 4. In order to aspirate and collect the primary concentrated suspended matter layer 4, a predetermined amount of surface water can be sucked. Thus, the funnel can be reliably discharged out of the dam via the water supply pipe 6 by the suction force by the positional energy using the water head difference from the recovery part 5 which is submerged from the surface water and fixed to the floating structure. it can. By connecting the upward water supply pipe 13 and the secondary fine bubble generator 15 that are turned upside down in the water tank 14 disposed on the downstream bottom of the water supply pipe 6, for example, the water head difference from the surface water of the dam If there is 50 m, 0.5 Mpa of pressure water can be obtained. From the gas injection hole 16 of the upstream water supply pipe 13 connected at this time, a pressure gas of 0.5 Mpa or more is made by the compressor 18 and the amount of gas injection By adjusting the gas injection amount with the adjustment valve 19 and press-fitting from the press-fitting pipe 17, the inside of the upward water supply pipe 13 becomes a pressure gas-liquid mixed liquid, and is added to the floating substance mixed water jetted from the fine bubble generator 15. The next fine bubbles 20 can be generated. As a result, the secondary fine bubbles 20 can be attached to the suspended matter in the water tank 14 and floated on the surface water area of the water tank to form the secondary suspended matter concentration layer 21. At this time, since the surface water of the water tank flows toward the floating substance separation / recovery tank 22 side, the discharge amount of the treated water 23 can be adjusted by the discharge amount adjusting valve 24 on the downstream discharge side of the water tank 14, thereby separating and collecting the floating substance. Since the amount of water at the water level flowing into the tank 22 can be changed, the floating amount can be recovered by adjusting the discharge amount adjusting valve 24 as desired. The collected suspended matter 25 can be used for composting and the like because it is an organic matter such as phytoplankton, dead bodies and fallen leaves that float in water.
[0009]
In FIG. 1 (b), when there is no water inlet on the dam wall or when it is not attached, the concentrated suspended matter in the surface water area is sucked using the siphon principle and released to the downstream side. The action of generating bubbles to float the concentrated suspended matter in the surface water area and the action of collecting the suspended matter at the downstream bottom are the same and will be omitted.
8 is a check valve attached to the lower part of the recovery unit 5 so that the water in the water pipe does not flow backward, and 9 is a pump for filling the water pipe on the suction side with water in order to take water using the principle of siphon. 10 is an air valve that draws out air in the water pipe so as to fill the water in the downstream water pipe, and 11 is a siphon that stops by the valve until the suction side and the downstream water pipe in which the siphon can be used is filled with water. The valve 12 is a water pipe valve that is stopped when water can be filled up to the uppermost part in the downstream water pipe.
[0010]
The operation method of the water treatment apparatus 1 using the principle of the siphon having the above configuration will be described.
First, the siphon valve 11 is closed, and the priming water is stopped by the check valve 8 attached to the water feeding pipe at the bottom of the collecting unit 5 at this time, and the priming water is introduced into the water feeding pipe on the suction side from the priming port of the pumping pump 9. The pumping pump 9 can be filled with priming water. The pumping pump 9 can be operated by this, and the water sent from the discharge port of the pumping pump 9 to the downstream water pipe closes the water pipe valve 12 attached to the downstream bottom, and the top of the water pipe By opening the air valve 10, water can be filled in the water supply pipe to the discharge port of the pumping pump 9. When the air valve 10 is closed and the pumping pump 9 is stopped and the siphon valve 11 and the water pipe valve 12 are opened, the primary concentrated floating substance 4 can be sucked and discharged to the downstream side by the principle of siphon. This series of operations can be electrically controlled using a sensor and a solenoid valve.
[0011]
FIG. 3 is a schematic diagram showing a state in which fine bubbles are attached to the suspended matter in the water and are floating toward the surface water area.
FIG. 4 shows data and calculated values obtained by experimenting the terminal velocity (mm / s) at which fine bubbles of each bubble diameter (μm) rise due to buoyancy.
[0012]
Since the water treatment apparatus of Embodiment 1 is configured as described above, it has the following actions.
(A) The ability of adhering fine bubbles to the suspended substance and floating can determine the residence time depending on the diameter and amount of fine bubbles generated in water and the generation position, and can control this. It is also suitable because it can purify a large amount of water by operating for 24 hours.
(B) The energy that sucks and collects suspended matter concentrated on the surface of the water and releases it to the downstream side, and the energy that generates fine bubbles in the water tank at the bottom of the bottom uses the potential energy due to the head difference, so it operates 24 hours Even if it is allowed, it is energy saving.
(C) Since the water level water amount of the secondary suspended matter concentration layer can be changed by the discharge amount adjustment valve on the downstream side in the water tank, it is possible to cope with the amount and type of suspended matter that increases or decreases depending on the season.
(D) Even if there is no water outlet from the dam wall, the suspended matter in the surface water area can be sucked and collected using the principle of siphon, so it can be used if there is a water head difference other than the dam.
[0013]
【The invention's effect】
The water treatment device according to the present invention has the following effects.
(A) Since air bubbles and oxygen and other gases are mixed in water to generate fine bubbles, the amount of dissolved oxygen in dams and lakes increases, making it possible to create a favorable environment for living organisms.
(B) According to the current water quality of dams and lakes and the like, the state of suspended matter floating on the surface water area can be seen, and the desired water depth and the amount of bubbles can be determined to generate fine bubbles.
(C) Since the floating mixed water layer that has surfaced in the surface water area is sucked and recovered with potential energy using the head differential, the operating lining cost is low, and the suspended solids can be reliably removed outside the dam or lake. .
(D) Since the surface water area can be sucked and drawn using the principle of siphon, it can be applied to dams and lakes where there is no water outlet on the dam wall if there is a head difference.
(E) The floating mixture water released outside the dam and lake can generate fine bubbles in the downstream bottom tank with potential energy due to the head differential, so the floating mixture water can be treated with the treated water and the concentrated suspension. Since it can be collected separately, it can be effectively reused as compost, etc., which is economical.
[Brief description of the drawings]
1A is a front view of a water treatment apparatus according to Embodiment 1. FIG. 1B is a front view of drawing water using the principle of a siphon. FIG. 2 is a front view of an enlarged portion to be secondarily concentrated. [Fig. 3] Schematic diagram of fine bubbles adhering to a floating substance in water [Fig. 4] Termination speed at which fine bubbles of each bubble diameter rise [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water treatment apparatus 2 of Embodiment 1 Fine bubble generator 3 Fine bubbles 4 Primary concentrated suspended matter layer 5 Collection part 6 Water supply pipe 7 Power source control part 8 Check valve 9 Pumping pump 10 Air valve 11 Siphon valve 12 Water supply pipe Valve 13 Upward water supply pipe 14 Water tank 15 Secondary fine bubble generator 16 Gas injection hole 17 Press-in pipe 18 Compressor 19 Gas injection amount adjustment valve 20 Secondary fine bubble 21 Secondary floating substance concentration layer 22 Floating substance separation and recovery tank 23 Treated water 24 Release control valve 25 Floating matter

Claims

Microbubbles generated in water as a means to generate microbubbles in water such as in dams and lakes, attach the microbubbles to suspended matter in the water, and float and concentrate in the surface water area by increasing buoyancy. In a water treatment apparatus comprising a vessel and a collection unit capable of sucking and collecting the surface water of the suspended matter collected in the surface water area by utilizing the potential energy due to a water head difference (including siphon) , Floating substance mixed water recovered by the recovery unit can flow into the downstream side with potential energy due to the water head difference and can be converted into pressure water, and the water supply pipe is turned upward in the water tank arranged at the bottom on the downstream side An upward water supply pipe, a secondary fine bubble generator connected to the upward water supply pipe, a gas injection hole provided with a hole through which gas can be pressed into the upward water supply pipe connected to the secondary fine bubble generator, and a compressor Etc., by making a pressure gas higher than the water pressure in the upward water pipe, adjusting the amount of gas from the gas injection hole through the injection pipe and supplying the gas, the bubble diameter of the fine bubbles generated in the water tank and A gas supply unit capable of adjusting the amount of bubbles, and the fine bubbles generated in the water tank adhere to the suspended matter and float and separate to form a secondary concentrated layer of suspended matter in the water surface of the water tank. A water treatment apparatus, comprising: a suspended matter separation and recovery tank capable of adjusting a water level and an amount of water with a discharge regulating valve when the secondary concentrated layer is recovered .