JP3031912B1 - Turbid water treatment system and turbid water treatment method - Google Patents
Turbid water treatment system and turbid water treatment methodInfo
- Publication number
- JP3031912B1 JP3031912B1 JP11169468A JP16946899A JP3031912B1 JP 3031912 B1 JP3031912 B1 JP 3031912B1 JP 11169468 A JP11169468 A JP 11169468A JP 16946899 A JP16946899 A JP 16946899A JP 3031912 B1 JP3031912 B1 JP 3031912B1
- Authority
- JP
- Japan
- Prior art keywords
- tank
- sludge
- turbid water
- water
- soil
- 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 - Fee Related
Links
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Abstract
【要約】
【課題】大量の濁水を経済的に処理し、工事費のコスト
ダウンを図ることができる濁水処理システム及び濁水処
理方法を提供する。
【解決手段】土粒子成分及び水成分を含む濁水が導入さ
れる現場備え付け式の原水槽１と、この原水槽１からの
濁水と土粒子凝集促進材とが供給されこれらを攪拌混合
して混合液とする現場備え付け式の攪拌槽２と、その混
合液が供給され、土粒子成分が土粒子凝集促進材と反応
して生成した土粒子凝集体を沈澱させて汚泥とする現場
備え付け式の沈澱槽３と、沈澱槽３に沈澱した汚泥と改
質材とが導入され、これらを攪拌混合し汚泥の性状を変
えて改良土とする現場備え付け式の汚泥処理槽４と、こ
の汚泥処理槽４に設けられ、改良土に含まれる水分を分
離して排出する透水性の土留め５とを有する。An object of the present invention is to provide a turbid water treatment system and a turbid water treatment method capable of economically treating a large amount of turbid water and reducing construction costs. SOLUTION: Turbulent water containing a soil particle component and a water component is installed on site and a raw water tank 1 is provided. Turbid water and a soil particle aggregation promoting material from the raw water tank 1 are supplied and mixed by stirring and mixing. A field-installed stirring tank 2 for supplying a liquid, and a mixed solution thereof is supplied, and a soil-particle component reacts with a soil-particle aggregation promoting material to precipitate the soil-particle agglomerates. The tank 3, a sludge settled in the settling tank 3, and a modifier are introduced, and these are stirred and mixed to change the properties of the sludge so as to provide an improved soil by changing the properties of the sludge. And a water-permeable earth retaining member 5 for separating and discharging water contained in the improved soil.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、大量の濁水を処理
する濁水処理システム及び濁水処理方法に関する。TECHNICAL FIELD The present invention relates to a turbid water treatment system and a turbid water treatment method for treating a large amount of turbid water.
【０００２】[0002]
【従来の技術】例えば、宅地造成等の大規模な土木工事
や、浚渫船による浚渫工事等においては、掘削土砂と共
に、濁りを構成する土粒子と水との混合物（濁水）が大
量に発生する。また、森林開発のために樹木伐採が大規
模に行われた場合には、これによって生じる裸地の保水
力低下のため、降雨時には上記同様の大量の濁水が短時
間の間に集積してくることとなる。この大量の濁水は、
従来、排水溝からそのまま河川・湖沼・海洋等（以下、
河川等という）に放流されていた。2. Description of the Related Art For example, in large-scale civil engineering work such as residential land development and dredging work by a dredge ship, a large amount of a mixture of muddy soil particles and water (turbid water) is generated together with excavated earth and sand. In addition, when tree cutting is performed on a large scale for forest development, a large amount of turbid water similar to the above accumulates in a short time during rainfall due to the reduced water retention capacity of bare land caused by this. It will be. This large amount of turbid water
Conventionally, rivers, lakes, marshes, oceans, etc.
Rivers).
【０００３】このような大量の濁水の垂れ流しは、河川
等の水質を悪化させたり河床・湖底・沼底・海底等に堆
積して水棲生物の生育を阻害したりして、自然環境の自
浄機能を喪失させ環境破壊を招く等の影響が懸念される
ため、環境問題上好ましくなかった。例えば沖縄地方で
は、森林開発による大量の濁水の海洋への流入のため海
洋汚濁が進行し、沿岸のサンゴ礁の死滅が環境問題とな
っている。[0003] Such a large amount of turbid water drips the water quality of rivers and the like, or accumulates on riverbeds, lake bottoms, swamp bottoms and sea floors, and inhibits the growth of aquatic organisms. It is not preferable in terms of environmental problems, because there is a concern about the influence of loss of water and environmental destruction. For example, in the Okinawa region, marine pollution has progressed due to the inflow of large amounts of turbid water into the ocean due to forest development, and the death of coastal coral reefs has become an environmental problem.
【０００４】そこで、近年、この濁水に関する法的な規
制が強化される方向にあり、公害対策基本法による環境
基準、水質汚濁防止法による排水基準等の基準値が強化
され、その基準値をクリアすることが施工者側に厳しく
要求されている。そのため、上記のような大量の濁水の
発生が予想されうる工事現場・建設現場には、従来、濁
水中に浮遊する土粒子を凝集剤で凝結沈澱させる大型の
濁水処理装置を設置して、大量の濁水の浄化処理を行う
必要があった。Therefore, in recent years, legal regulations on turbid water have been strengthened, and standard values such as environmental standards based on the Pollution Control Basic Law and drainage standards based on the Water Pollution Control Law have been strengthened and cleared. Is strictly required by the contractor. For this reason, large-scale turbid water treatment equipment that condenses and precipitates soil particles floating in turbid water with a flocculant is conventionally installed at construction sites and construction sites where large amounts of turbid water can be expected as described above. It was necessary to purify the turbid water.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来の処理方法には、以下のような課題があった。すなわ
ち、濁水処理装置の処理能力には一定の限界があるた
め、例えば５００ｍ3／ｈといった大量の濁水発生の可
能性がある上記工事現場・建設現場においては、上記大
型の濁水処理装置を複数台設置しなければならず、処理
コストが高騰する。However, the above-mentioned conventional processing method has the following problems. That is, since there is a certain limit in the processing capacity of the turbid water treatment device, a plurality of the large-sized turbid water treatment devices are provided in the construction site or the construction site where there is a possibility that a large amount of turbid water is generated, for example, 500 m 3 / h. Must be installed, which increases processing costs.
【０００６】また、上記のような工事現場・建設現場か
らの大量の濁水発生は、基本的には長期間にわたるわけ
ではなく、通常、ある特定の工程における比較的短時間
の間に限られる。そのため、その工程の施工が終了した
後には、濁水処理装置を撤去して運搬し、他の現場で使
用するのが経済的である。しかし、上記濁水処理装置は
それぞれが大型であるのに加え、複数台となると濁水処
理時の管理が煩雑であるとともに装置の運搬コストも累
積されるため、各現場へと次々と移動させて経済的に使
用するには不向きである。Further, the generation of a large amount of turbid water from a construction site or a construction site as described above does not basically last for a long period of time, but is usually limited to a relatively short period in a specific process. Therefore, it is economical to remove and transport the turbid water treatment device after the construction of the process is completed, and use it at another site. However, each of the above turbid water treatment devices is large, and when a plurality of turbid water treatment devices are used, management during turbid water treatment is complicated and the transportation cost of the devices is accumulated. Not suitable for general use.
【０００７】本発明の目的は、大量の濁水を経済的に処
理し、工事費のコストダウンを図ることができる濁水処
理システム及び濁水処理方法を提供することにある。An object of the present invention is to provide a turbid water treatment system and a turbid water treatment method capable of economically treating a large amount of turbid water and reducing construction costs.
【０００８】[0008]
【課題を解決するための手段】（１）上記目的を達成す
るために、本発明による濁水処理システムでは、土粒子
成分及び水成分を含む濁水が導入される現場備え付け式
の原水槽と、この原水槽からの前記濁水と土粒子凝集促
進材とが供給されこれらを攪拌混合して混合液とする現
場備え付け式の攪拌槽と、前記混合液が供給され、前記
土粒子成分が前記土粒子凝集促進材と反応して生成した
土粒子凝集体を沈澱させて汚泥とする現場備え付け式の
沈澱槽と、前記沈澱槽に沈澱した前記汚泥と改質材とが
導入され、これらを攪拌混合し前記汚泥の性状を変えて
改良土とする現場備え付け式の汚泥処理槽と、この汚泥
処理槽に設けられ、前記汚泥に含まれる水分を分離して
排出する透水性の土留めとを有する。Means for Solving the Problems (1) In order to achieve the above object, a turbid water treatment system according to the present invention is provided with a raw water tank provided on site where turbid water containing a soil particle component and a water component is introduced. The turbid water and the soil particle aggregation promoting material are supplied from a raw water tank, and a stirrer is installed on site to stir and mix them to form a mixed liquid, and the mixed liquid is supplied, and the soil particle component is mixed with the soil particle aggregation. An on-site installed sedimentation tank for sedimenting the soil particle aggregate formed by reacting with the accelerating material into sludge, the sludge settled in the sedimentation tank and the modifier are introduced, and these are stirred and mixed. It has a sludge treatment tank which is installed on site to change the properties of the sludge to obtain improved soil, and a water-permeable soil retaining member provided in the sludge treatment tank for separating and discharging water contained in the sludge.
【０００９】土粒子成分及び水成分を含む濁水は一旦原
水槽に導入され、その後この原水槽からの濁水と土粒子
凝集促進材（例えば高分子ポリマー系薬剤）とが攪拌槽
に供給されて攪拌混合され、混合液中において土粒子凝
集促進材と土粒子成分との反応が行われ、土粒子成分が
凝集して土粒子凝集体となる。その後、この混合液は沈
澱槽に供給され、土粒子凝集体は沈澱槽内で沈澱し汚泥
となる。The turbid water containing the soil particle component and the water component is once introduced into a raw water tank, and then the turbid water from the raw water tank and a soil particle aggregation promoting material (for example, a high-molecular polymer drug) are supplied to a stirring tank and stirred. The mixture is mixed, and a reaction between the soil particle aggregation promoting material and the soil particle component is performed in the mixed solution, and the soil particle component aggregates to form an earth particle aggregate. Thereafter, the mixed solution is supplied to a sedimentation tank, and the soil particle aggregates settle in the sedimentation tank to become sludge.
【００１０】ここでこの汚泥は、多くの水分を含有して
おり、また元は土粒子が凝集した土粒子凝集体であるた
め、これを資源として再利用するのは困難である。そこ
で、この沈澱した汚泥に、改質材（例えばセメント系改
質材）が加えられて汚泥処理槽に導入されて攪拌混合さ
れ、汚泥と改質材との反応によって汚泥の性状が変えら
れ、改良土とする。このとき、汚泥処理槽内の汚泥に含
まれている水分を、透水性の土留めによって分離し排出
することにより、汚泥処理槽にはさらに水分が除去され
た汚泥のみが残されることとなるので、これを改良土に
するための改質材の添加量を削減でき、より経済的な改
良土を作成することができる。[0010] Here, this sludge contains a large amount of water and is originally an aggregate of soil particles in which soil particles are aggregated, so that it is difficult to reuse this as a resource. Therefore, a modifier (for example, a cement-based modifier) is added to the precipitated sludge, introduced into a sludge treatment tank, and stirred and mixed, and the properties of the sludge are changed by a reaction between the sludge and the modifier, Improved soil. At this time, since the water contained in the sludge in the sludge treatment tank is separated and discharged by the permeable soil retaining, only the sludge from which the moisture has been further removed is left in the sludge treatment tank. Thus, the amount of the modifying material added to improve the soil can be reduced, and a more economical improved soil can be created.
【００１１】上記のようにして、工事現場・建設現場か
ら発生した濁水を順次浄化処理するとともに、発生した
汚泥を資源として再利用することができる。また、原水
槽の容量を適宜設定する（例えば想定される濁水発生量
のうち１時間程度の分を貯留可能とする）ことで、短時
間に大量の濁水が発生した場合にも、これを受け入れつ
つその後の攪拌槽→沈澱槽→汚泥処理槽における一連の
処理を無理なく円滑に行うことができる。また、従来の
大型濁水処理装置を複数台用いる場合に比べて、複数の
槽及び土留め等という比較的簡素な構造で安価に処理を
行うことができ、さらに複数の槽を現場据え付け式（現
場の地盤に直接作り込むか直接配置する方式）とするこ
とで、濁水処理管理や運搬コストの心配もなくなる。以
上により、大量の濁水を経済的に処理し、工事費のコス
トダウンを図ることができる。As described above, the turbid water generated from the construction site / construction site can be sequentially purified, and the generated sludge can be reused as a resource. Also, by appropriately setting the capacity of the raw water tank (for example, it is possible to store about one hour of the estimated amount of turbid water generated), even when a large amount of turbid water is generated in a short time, it is accepted. In addition, a series of processes in the subsequent stirring tank → sedimentation tank → sludge treatment tank can be smoothly and smoothly performed. In addition, compared to the case where a plurality of conventional large turbid water treatment devices are used, the treatment can be performed at a low cost with a relatively simple structure such as a plurality of tanks and soil retaining, and a plurality of tanks can be installed on site. The system is either built directly on the ground or placed directly on the ground), eliminating concerns about turbid water treatment management and transportation costs. As described above, a large amount of turbid water can be economically treated, and the construction cost can be reduced.
【００１２】（２）上記（１）において、好ましくは、
前記沈澱槽は、周囲を取り囲む側壁と、底盤と、この底
盤をさらに下方に堀込むように設けられ、前記沈澱する
汚泥を導入して集積・回収する沈澱汚泥回収槽と、前記
側壁の一部を切り欠くように設けられ、前記沈澱槽内の
前記混合液のうち所定水位を超えたオーバーフロー部分
を前記沈澱槽外へと排出する越流排出手段とを備えてい
る。(2) In the above (1), preferably,
The sedimentation tank is provided so as to dug the side wall surrounding the periphery, a bottom plate, and the bottom plate further downward, and a sedimentation sludge collection tank for introducing and collecting and collecting the sludge to be settled, and a part of the side wall is cut off. An overflow discharge means which is provided so as to be chipped and discharges an overflow portion of the mixed liquid in the sedimentation tank exceeding a predetermined water level to the outside of the sedimentation tank.
【００１３】（３）上記（１）又は（２）において、ま
た好ましくは、前記沈澱槽内の前記汚泥を前記汚泥処理
槽へと圧送する圧送ポンプを有する。(3) In the above (1) or (2), preferably, there is provided a pump for pumping the sludge in the settling tank to the sludge treatment tank.
【００１４】（４）上記（１）において、また好ましく
は、前記原水槽内の前記濁水のうち所定水位を超えたオ
ーバーフロー部分を前記攪拌槽へと自然流下させる第１
越流導入手段と、前記攪拌槽内の前記混合液のうち所定
水位を超えたオーバーフロー部分を前記沈澱槽へと自然
流下させる第２越流導入手段とを有する。このように、
原水槽→攪拌槽→沈澱槽へ自然流下により濁水や混合液
を流していく構成とすることにより、動力的機構が不要
となるので、さらに構造を簡素化し、コストを低減する
ことができる。(4) In the above (1), preferably, an overflow portion of the turbid water in the raw water tank that exceeds a predetermined water level naturally flows down to the stirring tank.
An overflow introducing means; and a second overflow introducing means for causing an overflow portion of the mixed liquid in the stirring tank that exceeds a predetermined water level to flow naturally into the precipitation tank. in this way,
By employing a configuration in which turbid water or a mixed solution is caused to flow naturally from a raw water tank to a stirring tank to a sedimentation tank, a dynamic mechanism is not required, so that the structure can be further simplified and the cost can be reduced.
【００１５】（５）上記（４）において、さらに好まし
くは、前記沈澱槽の流路幅を、前記第２越流導入手段の
幅よりも大きくする。これにより、第２越流導入手段か
らオーバーフローして沈澱槽へ流入した流れは、沈澱槽
において流速が低下する。これにより、沈澱槽内におけ
る土粒子凝集体の沈澱作用をより確実に確保することが
できる。(5) In the above (4), more preferably, the width of the flow path of the settling tank is made larger than the width of the second overflow introducing means. As a result, the flow of the flow overflowing from the second overflow introducing means and flowing into the precipitation tank is reduced in the precipitation tank. Thereby, the sedimentation action of the soil particle aggregate in the sedimentation tank can be more reliably ensured.
【００１６】（６）上記（４）において、また好ましく
は、前記第１越流導入手段における通過流量に応じ前記
土粒子凝集促進材を投入する土粒子凝集促進材投入装置
を有する。(6) In the above (4), preferably, there is provided a soil particle coagulation accelerating material input device for inputting the soil particle coagulation accelerating material according to a flow rate of the first overflow introduction means.
【００１７】（７）上記（１）又は（４）において、ま
た好ましくは、前記攪拌槽内に上部から差し込むように
設けられ、前記攪拌槽内の前記混合液のうち上部水面付
近を混合液導入側と混合液排出側とに仕切る仕切壁を有
する。これにより、混合液の流れは、攪拌槽内の混合液
導入側に導入された後、仕切壁の下方をくぐって混合液
排出側に至ることとなるので、流れが攪拌槽内の上部水
面付近のみを通過し十分に攪拌されないまま沈澱槽へと
流れるのを防止し、確実な攪拌作用を確保できる。(7) In the above (1) or (4), preferably, the mixture is provided so as to be inserted from above into the stirring tank, and a mixed liquid is introduced near the upper water surface of the mixed liquid in the stirring tank. And a partition wall for partitioning the mixture into a liquid discharge side. As a result, the flow of the mixed liquid is introduced to the mixed liquid introduction side in the stirring tank, and then passes below the partition wall to the mixed liquid discharge side, so that the flow is near the upper water surface in the stirring tank. Only to prevent the water from flowing into the sedimentation tank without being sufficiently stirred, and to ensure a reliable stirring action.
【００１８】（８）また上記目的を達成するために、本
発明による濁水処理方法では、土粒子成分及び水成分を
含む濁水を原水槽に導入し、この原水槽からの前記濁水
に土粒子凝集促進材を添加し攪拌槽内で攪拌混合して混
合液とし、この混合液において前記土粒子成分が前記土
粒子凝集促進材と反応して生成した土粒子凝集体を沈澱
槽内で沈澱させて汚泥とし、この沈澱した汚泥を汚泥処
理槽に導入した後、該汚泥処理槽に設けた透水性の土留
めを介し前記汚泥に含まれる水分を分離して排出すると
ともに、前記汚泥処理槽に改質材を添加して攪拌混合し
前記汚泥の性状を変えて改良土とする。(8) In order to achieve the above object, according to the turbid water treatment method of the present invention, turbid water containing a soil particle component and a water component is introduced into a raw water tank, and the soil particles aggregate from the raw water tank into the turbid water. An accelerating material is added and stirred and mixed in a stirring tank to form a mixed liquid. In this mixed liquid, the soil particle component reacts with the soil particle coagulation accelerating material to precipitate soil particle aggregates generated in the sedimentation tank. After introducing the precipitated sludge into the sludge treatment tank, the water contained in the sludge is separated and discharged through a permeable soil retaining provided in the sludge treatment tank, and the sludge is converted into the sludge treatment tank. The material is added and stirred and mixed to change the properties of the sludge to obtain an improved soil.
【００１９】（９）上記（８）において、好ましくは、
前記沈澱槽の底盤の下方に堀込むように設けた沈澱汚泥
回収槽に前記沈澱する汚泥を導入して集積・回収しつ
つ、前記沈澱槽内の前記混合液のうち所定水位を超えた
オーバーフロー部分を越流排出手段を介して前記沈澱槽
外へと排出する。(9) In the above (8), preferably,
While introducing and collecting and collecting the sludge to be settled into a settled sludge collection tank provided so as to be dug below the bottom of the settling tank, the settled sludge passes over an overflow portion exceeding a predetermined water level in the mixed liquid. It is discharged out of the settling tank via a stream discharge means.
【００２０】（１０）上記（８）又は（９）において、
また好ましくは、前記沈澱槽内の前記汚泥を前記汚泥処
理槽へと圧送する。(10) In the above (8) or (9),
Preferably, the sludge in the settling tank is pumped to the sludge treatment tank.
【００２１】[0021]
【発明の実施の形態】以下、本発明の一実施形態を図面
を参照しつつ説明する。An embodiment of the present invention will be described below with reference to the drawings.
【００２２】本実施形態による濁水処理システムの構成
を表す上面図を図１（ａ）に、図１中Ｉ−Ｉ断面による
側断面図を図１（ｂ）に示す。FIG. 1A is a top view showing the configuration of the turbid water treatment system according to the present embodiment, and FIG. 1B is a side sectional view taken along the line II in FIG.
【００２３】これら図１（ａ）及び図１（ｂ）におい
て、本実施形態による濁水処理システムは、概略的に言
うと、土粒子成分及び水成分を含む濁水が導入される現
場備え付け式の原水槽１と、この原水槽１からの濁水と
土粒子凝集促進材（詳細は後述）とが供給されこれらを
攪拌混合して混合液とする現場備え付け式の攪拌槽２
と、その混合液が供給され、土粒子成分が土粒子凝集促
進材と反応して生成した土粒子凝集体（同）を沈澱させ
て汚泥（同）とする現場備え付け式の沈澱槽３と、沈澱
槽３に沈澱した汚泥と改質材（同）とが導入され、これ
らを攪拌混合し汚泥の性状を変えて改良土（同）とする
現場備え付け式の汚泥処理槽４と、この汚泥処理槽４に
設けられ、改良土以前の汚泥に含まれる水分を分離して
排出する透水性の土留め５とを有している。1 (a) and 1 (b), the turbid water treatment system according to the present embodiment is a field-installed source into which turbid water containing a soil particle component and a water component is introduced. A water tank 1, turbid water from the raw water tank 1, and a soil particle aggregation promoting material (details will be described later) are supplied, and these are stirred and mixed to form a mixed liquid on site.
And a mixed solution thereof is supplied, and an on-site installation type sedimentation tank 3 for sedimenting the soil particle aggregate (the same) produced by the reaction of the soil particle component with the soil particle aggregation promoting material to produce sludge (the same); The sludge settled in the sedimentation tank 3 and the modifying agent (the same) are introduced, and these are stirred and mixed to change the properties of the sludge to provide an improved soil (the same). The tank has a permeable soil retaining member 5 that is provided in the tank 4 and separates and discharges water contained in sludge before the improved soil.
【００２４】原水槽１の上流側（図１（ａ）及び図１
（ｂ）中左側）には、導水路６が配置されており、宅地
造成等の大規模な土木工事や、浚渫船による浚渫工事等
から生じる濁水が、原水槽１に導入されるようになって
いる。この原水槽１は、図１（ｂ）に示すようにこのシ
ステムを設置する地盤に直接形成され、上面より見て略
正方形形状をなしており、底面１ａは略水平面に形成さ
れると共に４つの側面１ｂは法面状に形成されている。
また原水槽１の大きさは、それら工事等の規模に応じ
て、例えば想定される濁水発生量のうち１時間程度の分
（例えば５００ｍ3／ｈ）を貯留可能とする容量（例え
ば６００ｍ3）とする。なお、原水槽１の形状はこれに
限定されるものではなく、濁水発生量のうち所定時間分
（上記の例では１時間分）を貯留可能とする容量さえ確
保できれば足りることは言うまでもない。The upstream side of the raw water tank 1 (FIG. 1 (a) and FIG.
(B) In the middle left), a headrace channel 6 is arranged, and muddy water generated from large-scale civil engineering work such as residential land development and dredging work by a dredger is introduced into the raw water tank 1. I have. The raw water tank 1 is formed directly on the ground on which the system is installed as shown in FIG. 1 (b), has a substantially square shape when viewed from the top, and has a bottom 1a formed substantially in a horizontal plane and four The side surface 1b is formed in a slope shape.
In addition, the size of the raw water tank 1 depends on the scale of the construction or the like, for example, a capacity (for example, 600 m 3 ) capable of storing about one hour (for example, 500 m 3 / h) of the estimated turbid water generation amount. And It should be noted that the shape of the raw water tank 1 is not limited to this, and it goes without saying that it is sufficient to secure a capacity capable of storing a predetermined amount of time (one hour in the above example) of the amount of turbid water generated.
【００２５】原水槽１と攪拌槽２との間には、原水槽１
内の濁水７のうち所定水位を超えたオーバーフロー部分
を攪拌槽２へと自然流下させる越流路８が設けられてい
る。その寸法は、例えば幅６ｍ、深さ０．５ｍとなって
いる。このとき、この越流路８の近傍には、図示しない
タンクに貯留された土粒子凝集促進材を越流路８に投入
する土粒子凝集促進材投入装置９（図１（ｂ）にのみ図
示）が設けられており、越流路８の通過流量に応じた
（この実施形態では、原水槽１の水位計１０で検出され
た水位信号に応じた）量（あらかじめ定められた相関に
基づき、濁水を凝集沈澱させるのに最も適した量）の土
粒子凝集促進材を越流路８へ供給するようになってい
る。なお、原水槽１からの濁水量の変動が少ないことが
あらかじめわかっている場合等においては、土粒子凝集
促進材投入装置９からの土粒子凝集促進材の投入量は、
ある所定の定量投入としてもよい。Between the raw water tank 1 and the stirring tank 2, the raw water tank 1
An overflow channel 8 is provided for allowing an overflow portion of the turbid water 7 in the inside that exceeds a predetermined water level to naturally flow down to the stirring tank 2. The dimensions are, for example, 6 m in width and 0.5 m in depth. At this time, in the vicinity of the overflow channel 8, a soil particle aggregation promoting material input device 9 (illustrated only in FIG. 1 (b)) for feeding the soil particle aggregation promoting material stored in a tank (not shown) into the overflow channel 8. ) Is provided, and in accordance with the flow rate through the overflow channel 8 (in this embodiment, according to the water level signal detected by the water level meter 10 of the raw water tank 1) (based on a predetermined correlation, An amount of the soil particle coagulation accelerator (the amount most suitable for coagulating and sedimenting the turbid water) is supplied to the overflow channel 8. In addition, when it is known in advance that the fluctuation of the amount of turbid water from the raw water tank 1 is small, the input amount of the soil particle aggregation promoting material from the soil particle aggregation promoting material input device 9 is:
It may be a certain predetermined quantitative input.
【００２６】攪拌槽２は、このシステムを設置する地盤
に直接配置され、略水平面の底面２ａと曲面状の側面２
ｂとを備えた略円筒形状（上面より見て略円形形状）を
なしている。側面２ｂのうち、上流側（混合液導入側、
図１（ａ）（ｂ）中左側）部分２ｂａに対し、下流側
（混合液排出側、図１（ａ）（ｂ）中右側）部分２ｂｂ
のほうが上端部の高さが低くなっており（結果として下
流側部分２ｂｂの上端部高さは越流路８の底面の高さよ
りも低くなっている）、攪拌槽２内の混合液１２のうち
その上端部の高さに相当する水位を超えたオーバーフロ
ー部分を沈澱槽３へと自然流下させるようになってい
る。また、上記越流路８の下端部に接続するように中仕
切壁１１が攪拌槽２内に上部から差し込むように設けら
れており、攪拌槽２内の混合液１２のうち上部水面付近
を混合液導入側と混合液排出側とに仕切るようになって
いる。また、攪拌槽２内には、図示しない攪拌用ポンプ
が設けられており、攪拌槽２内の混合液を例えば図１
（ａ）で見て右回りに流動させ、これによって混合液を
攪拌するようになっている。なお、攪拌槽２の大きさ
は、上記原水槽１及び越流路８の大きさに応じて、例え
ば４０ｍ3の容量を確保できる大きさとすればよい。The stirring tank 2 is disposed directly on the ground on which this system is installed, and has a substantially horizontal bottom surface 2a and a curved side surface 2a.
(b) (substantially circular shape when viewed from above). Of the side surface 2b, the upstream side (the mixture introduction side,
The downstream portion (mixture discharge side, the right side in FIGS. 1A and 1B) 2bb with respect to the portion 2ba in FIG.
Has a lower height at the upper end (as a result, the height of the upper end of the downstream portion 2bb is lower than the height of the bottom surface of the overflow channel 8). Of these, the overflow portion exceeding the water level corresponding to the height of the upper end portion is allowed to naturally flow down to the settling tank 3. Further, a partition wall 11 is provided so as to be inserted into the stirring tank 2 from above so as to be connected to the lower end of the overflow channel 8, and the vicinity of the upper surface of the mixed liquid 12 in the stirring tank 2 is mixed. The liquid inlet side and the mixed liquid outlet side are partitioned. Further, a stirring pump (not shown) is provided in the stirring tank 2, and the mixed liquid in the stirring tank 2 is, for example, shown in FIG.
It is made to flow clockwise as seen in (a), whereby the mixture is stirred. The size of the stirring tank 2 may be such that a capacity of, for example, 40 m 3 can be secured according to the size of the raw water tank 1 and the overflow channel 8.
【００２７】沈澱槽３は、攪拌槽２と同様、このシステ
ムを設置する地盤に直接配置され、図１（ａ）（ｂ）に
示すようにその上流側端部は攪拌槽２と重なるように配
置されている。そして沈澱槽３は、周囲を取り囲む法面
状の側壁３ａ，３ｂと、略平面状の底盤３ｃと、この底
盤３ｃをさらに下方に堀込むように設けられ、沈澱する
汚泥を導入して集積・回収する沈澱汚泥回収槽３ｄと、
側壁の一部（この実施形態では下流側側壁）を切り欠く
ように設けられ、沈澱槽３内の混合液のうち所定水位を
超えたオーバーフロー部分を沈澱槽３外へと排出する越
流堰３ｅとを備えている。The sedimentation tank 3 is disposed directly on the ground on which this system is installed, similarly to the stirring tank 2, and its upstream end overlaps with the stirring tank 2 as shown in FIGS. 1 (a) and 1 (b). Are located. The sedimentation tank 3 is provided so as to have sloped side walls 3a and 3b surrounding the periphery, a substantially flat bottom plate 3c, and the bottom plate 3c is dug down further, and introduces and collects and collects the sludge that precipitates. A settling sludge recovery tank 3d,
An overflow weir 3e which is provided so as to cut off a part of the side wall (downstream side wall in this embodiment) and discharges an overflow portion of the mixed solution in the settling tank 3 exceeding a predetermined water level to the outside of the settling tank 3. And
【００２８】このとき、沈澱汚泥回収槽３ｄは、略すり
鉢状の底面３ｄａと曲面状の側面３ｄｂとを備えた形状
（上面より見て略円形形状）をなしている。そして底面
３ｄａの最低部には、圧送ポンプ１５が設けられ、図示
しない公知の圧送用配管（但し図１（ａ）に概念的に破
線で図示）を介し、沈澱槽３内の汚泥を汚泥処理槽４へ
と圧送するようになっている。また越流堰３ｅの上端部
の高さは、前記の攪拌槽下流側部分２ｂｂの上端部高さ
よりも低くなっており、沈澱槽３内の混合液１２のうち
その越流堰３ｅの上端部の高さに相当する水位を超えた
オーバーフロー部分を排水路１４へと自然流下させ排出
するようになっている。なお、沈澱槽３の主たる流れ方
向（図１（ａ）（ｂ）中右方向）に直角な方向（図１
（ａ）（ｂ）中上下方向）における幅Ｈ1は、越流路８
や攪拌槽下流側部分２ｂｂの同方向における幅Ｈ2より
も大きくなっている。なお、沈澱槽３及び沈澱汚泥回収
槽３ｄの大きさは、上記原水槽１、越流路８、攪拌槽２
の大きさに対応して、例えば沈澱槽３は９０ｍ3、沈澱
汚泥回収槽３ｄはそれぞれ４０ｍ3の容量を確保できる
大きさとすればよい。At this time, the settling tank 3d has a substantially mortar-shaped bottom surface 3da and a curved side surface 3db (substantially circular shape when viewed from the top). A pump 15 is provided at the lowest part of the bottom surface 3da, and the sludge in the settling tank 3 is treated through a known pumping pipe (not shown in FIG. 1A). The pressure is fed to the tank 4. The height of the upper end of the overflow weir 3e is lower than the height of the upper end of the downstream portion 2bb of the stirring tank, and the upper end of the overflow weir 3e of the mixed liquid 12 in the settling tank 3 The overflow portion exceeding the water level corresponding to the height of the water is allowed to naturally flow down to the drainage channel 14 and discharged. The direction perpendicular to the main flow direction of the settling tank 3 (right direction in FIGS. 1A and 1B) (FIG. 1)
The width H1 in (a) and (b) the middle vertical direction is
And the width H2 of the downstream portion 2bb of the stirring tank in the same direction is larger than the width H2. The size of the sedimentation tank 3 and the sedimentation sludge collection tank 3d is the same as that of the raw water tank 1, the overflow channel 8, the stirring tank 2
For example, the sedimentation tank 3 may have a size of 90 m 3 and the sedimentation sludge recovery tank 3 d may have a size of 40 m 3 .
【００２９】汚泥処理槽４は、上記原水槽１と同様、こ
のシステムを設置する地盤に直接形成され（後述の図３
参照）、周囲を取り囲む法面状の側壁４ａ，４ｂ，４ｃ
と、略平面状の底盤４ｄとを備えている。このとき、土
留め５は、側壁４ｃの一部を切り欠くように設けられ、
図１（ａ）中II−II断面による断面図を図２（ａ）に示
すように、公知の透水性材料（例えば小径の砕石、ドレ
ーン材、化成品加工材、不織布等）５ａを盛り土状（両
側が法面状）に積んで構成されている。そして、汚泥処
理槽４内の改良土以前の汚泥１３（詳細は後述）に含ま
れる水分を分離して排水溝１４へ排出するようになって
いる。なお、土留め５は図２（ａ）に示すような盛り土
状の構成に限られず、例えば図２（ｂ）に示すように両
側に杭１９を並べてその内側にメッシュ２０を配置し、
さらにそのメッシュ２０の内側に透水性材料５ａを充填
することにより構成しても良い。この場合も同様の効果
を得る。また、汚泥処理槽４の大きさは、上記原水槽
１、越流路８、攪拌槽２、沈澱槽３、及び沈澱汚泥回収
槽３ｄの大きさに対応して、例えば１１０ｍ3の容量を
確保できる大きさとすればよい。The sludge treatment tank 4 is formed directly on the ground on which this system is installed, similarly to the raw water tank 1 (see FIG. 3 described later).
), Sloped side walls 4a, 4b, 4c surrounding the periphery
And a substantially flat bottom plate 4d. At this time, the earth retaining 5 is provided so as to cut out a part of the side wall 4c,
As shown in FIG. 2A, which is a cross-sectional view taken along the line II-II in FIG. 1A, a known water-permeable material (for example, small-diameter crushed stone, drain material, chemical processed material, nonwoven fabric, etc.) 5a is embankment-shaped. (Both sides are sloped). Then, the water contained in the sludge 13 before improvement soil (details will be described later) in the sludge treatment tank 4 is separated and discharged to the drain 14. In addition, the earth retaining 5 is not limited to the embankment-shaped configuration as shown in FIG. 2 (a). For example, as shown in FIG. 2 (b), the piles 19 are arranged on both sides, and the mesh 20 is arranged inside thereof.
Further, the inside of the mesh 20 may be filled with a water-permeable material 5a. In this case, a similar effect is obtained. The size of the sludge treatment tank 4 is, for example, 110 m 3 , corresponding to the size of the raw water tank 1, the overflow channel 8, the stirring tank 2, the settling tank 3, and the settled sludge recovery tank 3 d. The size should be as large as possible.
【００３０】なお、以上の構成において、越流路８が、
各請求項に記載された、原水槽内の濁水のうち所定水位
を超えたオーバーフロー部分を攪拌槽へと自然流下させ
る第１越流導入手段を構成し、沈澱槽側面下流側部分２
ｂｂが、攪拌槽内の混合液のうち所定水位を超えたオー
バーフロー部分を沈澱槽へと自然流下させる第２越流導
入手段を構成し、中仕切壁１１が、攪拌槽内の混合液の
うち上部水面付近を混合液導入側と混合液排出側とに仕
切る仕切壁を構成し、越流堰３ｅが、沈澱槽内の混合液
のうち所定水位を超えたオーバーフロー部分を沈澱槽外
へと排出する越流排出手段を構成する。In the above configuration, the overflow channel 8 is
A first overflow introducing means for naturally flowing an overflow portion of the turbid water in the raw water tank exceeding a predetermined water level to the stirring tank, and a downstream portion 2 on the side surface of the settling tank;
bb constitutes a second overflow introduction means for causing an overflow portion of the mixed liquid in the stirring tank to flow over the predetermined water level to the sedimentation tank, and the partition wall 11 is formed of the mixed liquid in the stirring tank. A partition wall is formed to partition the vicinity of the upper water surface into a mixed liquid introduction side and a mixed liquid discharge side, and an overflow weir 3e discharges an overflow portion of the mixed liquid in the settling tank that exceeds a predetermined water level to the outside of the settling tank. The overflow discharge means.
【００３１】次に、以上のように構成した本実施形態に
よる濁水処理システムの動作及び作用を図３を用いて以
下に説明する。Next, the operation and operation of the turbid water treatment system according to the present embodiment configured as described above will be described below with reference to FIG.
【００３２】図３において、土木工事、浚渫工事、その
他の建設工事等から生じた濁水は、導水路６を介して一
旦原水槽１に導入される。このとき、前述のように原水
槽１の大きさは、それら工事等の規模に応じて、想定さ
れる所定の濁水量を貯留可能とする容量となっている
が、さらに濁水の流入が継続してその容量を超えると、
原水槽１内の濁水７は越流路８へとオーバーフローす
る。このときその原水槽１内の濁水７の水位が水位計１
０で検出されており、例えばそのオーバーフローして所
定時間経過した後に、土粒子凝集促進材投入装置９が、
越流路８へ流れる濁水に対して公知の高分子ポリマー系
の土粒子凝集促進材の投入を開始し、越流路８の水位が
上昇するとその投入量も増大させる。In FIG. 3, turbid water generated by civil engineering work, dredging work, other construction work, and the like is once introduced into the raw water tank 1 through the headrace channel 6. At this time, as described above, the size of the raw water tank 1 has a capacity that can store an assumed predetermined amount of turbid water according to the scale of the construction or the like, but further inflow of turbid water continues. Over its capacity,
Turbid water 7 in the raw water tank 1 overflows to the overflow channel 8. At this time, the water level of the turbid water 7 in the raw water tank 1 is
0, for example, after a predetermined time has elapsed after the overflow, the soil particle aggregation promoting material charging device 9
The addition of a known polymer-polymer-based soil particle aggregation promoting material to the turbid water flowing into the overflow channel 8 is started, and when the water level in the overflow channel 8 rises, the amount of the addition increases.
【００３３】この濁水７に土粒子凝集促進材が添加され
た混合液は、越流路８を流れて、側面上流側部分２ｂａ
から攪拌槽２内に流下する。このとき、前述した土粒子
凝集促進材投入装置９の起動と連携して（例えば起動と
同時に）、攪拌槽２内の攪拌ポンプが起動し、攪拌槽２
内に流下した混合液１２を攪拌する。これにより、混合
液１２中において土粒子凝集促進材と土粒子成分との反
応が行われ、土粒子成分が凝集して土粒子凝集体（フロ
ッグ）１２ａとなる。高分子ポリマー系の土粒子凝集促
進材を添加して生成したフロッグ１２ａは、生成後にこ
のフロッグ１２ａを含む混合液１２を攪拌しても、その
フロッグ１２ａが再び液体中に離散することはない。な
おこのとき、攪拌槽２に中仕切壁１１を設けていること
により、混合液１２の流れは、攪拌槽２内の混合液導入
側（図３中左側）に導入された後、中仕切壁１１の下方
を強制的にくぐらされて（矢印参照）混合液排出側（図
３中右側）に至ることとなるので、流れが攪拌槽２内の
上部水面付近のみを通過し十分に攪拌されないまま沈澱
槽３へと流れるのを防止し、確実な攪拌作用を確保しフ
ロッグ１２ａを確実に生成できる。The mixed liquid obtained by adding the soil particle aggregation promoting material to the turbid water 7 flows through the overflow channel 8 and the side upstream portion 2ba
And flow down into the stirring tank 2. At this time, the stirring pump in the stirring tank 2 is started in cooperation with (for example, simultaneously with the start) of the above-described soil particle aggregation promoting material charging device 9, and the stirring tank 2 is started.
The mixed solution 12 flowing down is stirred. As a result, the reaction between the soil particle aggregation promoting material and the soil particle component is performed in the mixed liquid 12, and the soil particle component aggregates to form a soil particle aggregate (frog) 12a. The frog 12a generated by adding the polymer-based soil particle aggregation promoting material will not be dispersed again in the liquid even if the mixed solution 12 containing the frog 12a is stirred after the generation. At this time, since the partition wall 11 is provided in the stirring tank 2, the flow of the mixed liquid 12 is introduced into the mixed liquid introduction side (the left side in FIG. 3) in the stirring tank 2, and then the partition wall is separated. 11 is forced to pass under (see arrow) and reaches the mixed liquid discharge side (right side in FIG. 3), so that the flow passes only near the upper water surface in the stirring tank 2 and is not sufficiently stirred. The flow to the settling tank 3 is prevented, a reliable stirring action is ensured, and the frog 12a can be reliably generated.
【００３４】その後、上記のようにして生成したフロッ
グ１２ａを含む混合液１２は、沈澱槽３に供給され、攪
拌槽２の側面下流側部分２ｂｂから沈澱槽３内に流下す
る。沈澱槽３内に流下した混合液１２は、越流堰３ｅへ
向かって図３中右側へゆっくりと流れ、上澄み液１２ｂ
はそのまま越流堰３ｅから排水溝１４へと排出される
が、このとき同時に、混合液１２に含まれるフロッグ１
２ａは徐々に沈降し、沈澱槽３の下部に設けられた沈澱
汚泥回収槽３ｄに導入されその内部に沈澱集積されて汚
泥１３となる。このとき、沈澱槽３の流路幅Ｈ1を、越
流路８や沈澱槽２の幅Ｈ2よりも大きくしていることに
より、沈澱槽下流側部分２ｂｂからオーバーフローして
沈澱槽３へ流入した流れは、沈澱槽３において流速が低
下するので、沈澱槽３内におけるフロッグ１２ａの沈澱
作用をより確実に確保できるようになっている。Thereafter, the mixed solution 12 containing the frogs 12a generated as described above is supplied to the settling tank 3, and flows down into the settling tank 3 from the side downstream portion 2bb of the stirring tank 2. The mixed solution 12 that has flowed down into the settling tank 3 slowly flows toward the overflow weir 3e to the right in FIG.
Is directly discharged from the overflow weir 3 e to the drain ditch 14. At this time, the frog 1 contained in the mixed solution 12 is simultaneously discharged.
2a gradually settles, is introduced into a settling sludge recovery tank 3d provided at the lower part of the settling tank 3, and is settled and accumulated therein to become sludge 13. At this time, the flow width H1 of the sedimentation tank 3 is made larger than the width H2 of the overflow channel 8 and the sedimentation tank 2, so that the flow that overflows from the downstream part 2bb of the sedimentation tank and flows into the sedimentation tank 3 Since the flow velocity in the sedimentation tank 3 decreases, the sedimentation action of the frog 12a in the sedimentation tank 3 can be ensured more reliably.
【００３５】ここで、この汚泥１３は、多くの水分を含
有しており、また元は土粒子が凝集したフロッグ１２ａ
であるため、これを資源として再利用するのは困難であ
る。そこで、まず、この沈澱した汚泥１３を圧送ポンプ
１５で汚泥処理槽４へと送った後、この汚泥１３に含ま
れている水分を、時間の経過と共に土留め５によって分
離（固液分離）して排水溝１４へと排出する。これによ
り、汚泥処理槽４には水分が除去され必要な強度を備え
た汚泥１３のみが残される。その後、この汚泥に対し、
例えばセメント系固化材からなる改質材を人力又は適宜
の器具を用いて添加し、例えば油圧ショベルのバケット
等により攪拌混合する。これにより、汚泥１３と改質材
との反応によって汚泥１３の性状が変えられて、改良土
となるので、これを例えば盛土や埋立土用に資源として
再利用することができる。このように汚泥１３中の水分
を除去した後に改質材を添加することにより、改良土に
するための改質材の添加量を削減でき、より経済的な改
良土を作成することができる。Here, the sludge 13 contains a lot of water, and originally the frog 12a in which the soil particles are aggregated.
Therefore, it is difficult to reuse this as a resource. Then, first, the precipitated sludge 13 is sent to the sludge treatment tank 4 by the pressure pump 15, and then the water contained in the sludge 13 is separated (solid-liquid separation) by the earth retaining 5 with the passage of time. And discharged into the drain 14. As a result, only the sludge 13 having the required strength is left in the sludge treatment tank 4 from which water is removed. Then, for this sludge,
For example, a modifier made of a cement-based solidifying material is added manually or using an appropriate tool, and the mixture is stirred and mixed by, for example, a bucket of a hydraulic shovel. Thereby, the properties of the sludge 13 are changed by the reaction between the sludge 13 and the modifying material, and the sludge 13 becomes an improved soil, which can be reused as a resource for embankment or landfill soil, for example. By adding the modifying agent after removing the water in the sludge 13 in this manner, the amount of the modifying agent added to the improved soil can be reduced, and a more economical improved soil can be created.
【００３６】なお、この改良土を何に再利用するかに応
じて、前述の改質材の種類や量を適宜選択してもよいこ
とは言うまでもない。またこのとき、汚泥１３と改質材
との反応においては、濁水中の土粒子成分に土粒子凝集
促進材が加えられたものにさらに改質材が加わることと
なる結果、土粒子凝集促進材なしで直接改質材を加えた
場合のように固結状（団子状）とならないため、固まり
の解きほぐしの必要がないという効果もある。It goes without saying that the type and amount of the above-mentioned modifier may be appropriately selected according to the purpose of reusing the improved soil. Further, at this time, in the reaction between the sludge 13 and the modifying agent, the modifying agent is further added to the soil particle component in the turbid water to which the soil particle aggregation promoting material has been added. It does not form a consolidation (dumpling) as in the case where the modifier is directly added without the above, and there is also an effect that it is not necessary to disintegrate the mass.
【００３７】このようにして、工事現場・建設現場から
発生した濁水を順次浄化処理するとともに、発生した汚
泥を資源として再利用することができる。In this way, the turbid water generated from the construction site / construction site can be sequentially purified, and the generated sludge can be reused as a resource.
【００３８】以上説明したように、本実施形態の濁水処
理システムにおいては、短時間に大量の濁水が発生した
場合にも、原水槽１の容量を適宜設定する（例えば想定
される濁水発生量のうち１時間程度の分を貯留可能とす
る）ことで、これを受け入れつつその後の攪拌槽２→沈
澱槽３→汚泥処理槽４における一連の処理を無理なく円
滑に行うことができる。また、従来の大型濁水処理装置
を複数台用いる場合に比べて、複数の槽２，３，４及び
土留め５等という比較的簡素な構造で安価に処理を行う
ことができ、さらに複数の槽２，３，４を現場据え付け
式（現場の地盤に直接作り込むか直接配置する方式）と
することで、濁水処理管理や運搬コストの心配もなくな
る。したがって、大量の濁水を経済的に処理し、工事費
のコストダウンを図ることができる。As described above, in the turbid water treatment system of the present embodiment, even when a large amount of turbid water is generated in a short time, the capacity of the raw water tank 1 is appropriately set (for example, the estimated turbid water generation amount). By allowing about one hour to be stored, a series of processing in the subsequent stirring tank 2 → sedimentation tank 3 → sludge treatment tank 4 can be smoothly performed smoothly while receiving this. Further, compared with the case of using a plurality of conventional large turbid water treatment devices, the treatment can be performed at a low cost with a relatively simple structure such as a plurality of tanks 2, 3, 4 and a retaining wall 5, and a plurality of tanks. By adopting the on-site installation type (2, 3 or 4) (the method of directly building or directly arranging the on-site ground), there is no need to worry about turbid water treatment management and transportation costs. Therefore, a large amount of turbid water can be economically treated, and the cost of construction can be reduced.
【００３９】また、上記したように、原水槽１→攪拌槽
２→沈澱槽３へ自然流下により濁水７や混合液１２を流
していく構成とすることにより、動力的機構が不要とな
るので、さらに構造を簡素化し、コストを低減すること
ができる。Further, as described above, the turbid water 7 and the mixed solution 12 are allowed to flow by gravity to the raw water tank 1 → the stirring tank 2 → the sedimentation tank 3, thereby eliminating the need for a dynamic mechanism. Further, the structure can be simplified and the cost can be reduced.
【００４０】なお、上記実施形態においては、沈澱汚泥
回収槽３ｄの底面３ｄａを略すり鉢状とし、その最低部
に圧送ポンプ１５を設けたが、これに限られない。例え
ば、図４（ａ）及び図４（ｂ）に示すように、底面３ｄ
ａを平底状に形成すると共に、この沈澱汚泥回収槽３ｄ
の径方向中央上方を覆うように複数本（この例では３
本）の支柱１６ａ〜１６ｃからなる櫓１６を立設し、こ
の櫓１６の上部に設けた吊り具１７を通したワイヤーロ
ープ・チェーン等１８を介して圧送ポンプ１８を吊り下
げてもよい。この場合、図４（ｂ）に破線で示すよう
に、ワイヤーロープ・チェーン等１８を人力又はチェー
ンブロック等の巻き上げ機を用いて引き回すことによ
り、底面３ｄａ上において圧送ポンプ１８による吸込位
置を自在に移動することができる。吸い込んだ汚泥はホ
ース１５ａを介して汚泥処理槽４へと送られる。この場
合も、同様の効果を得る。In the above-described embodiment, the bottom surface 3da of the settling sludge recovery tank 3d is substantially mortar-shaped, and the pump 15 is provided at the lowest part thereof. However, the present invention is not limited to this. For example, as shown in FIG. 4A and FIG.
a in the form of a flat bottom, and the settled sludge recovery tank 3d
(In this example, 3
The turret 16 including the columns 16a to 16c of the book may be erected, and the pressure pump 18 may be suspended via a wire rope, a chain, or the like 18 through a suspending tool 17 provided on the upper part of the turret 16. In this case, as shown by a broken line in FIG. 4 (b), the suction position of the pressure pump 18 can be freely set on the bottom surface 3da by pulling the wire rope, chain, or the like 18 manually or using a hoist such as a chain block. You can move. The sucked sludge is sent to the sludge treatment tank 4 via the hose 15a. In this case, a similar effect is obtained.
【００４１】[0041]
【発明の効果】本発明によれば、短時間に大量の濁水が
発生した場合にも、これを受け入れつつその後の攪拌槽
→沈澱槽→汚泥処理槽における一連の処理を無理なく円
滑に行うことができるので、大量の濁水を経済的に処理
し工事費のコストダウンを図ることができる。According to the present invention, even if a large amount of turbid water is generated in a short time, a series of processing in the subsequent stirring tank → sedimentation tank → sludge treatment tank can be performed smoothly and smoothly while accepting this. Therefore, a large amount of turbid water can be economically treated and the cost of construction can be reduced.
【図１】本発明の一実施形態による濁水処理システムの
構成を表す上面図、及び図１（ａ）中Ｉ−Ｉ断面による
側断面図である。FIG. 1 is a top view illustrating a configuration of a turbid water treatment system according to an embodiment of the present invention, and a side cross-sectional view taken along line II in FIG. 1 (a).
【図２】図１（ａ）中II−II断面による断面図、及びそ
の変形例を示す図である。FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1A and a diagram showing a modified example thereof.
【図３】本発明の一実施形態による濁水処理システムに
おいて濁水処理を行っている様子を示す図である。FIG. 3 is a diagram showing how turbid water treatment is performed in the turbid water treatment system according to one embodiment of the present invention.
【図４】沈澱汚泥回収槽及び圧送ポンプに関する変形例
を示す図である。FIG. 4 is a view showing a modified example of the settling sludge recovery tank and the pressure pump.
１ 原水槽 ２ 攪拌槽 ２ｂｂ 側面下流側部分（第２越流導入手段） ３ 沈澱槽 ３ａ，ｂ 側壁 ３ｃ 底盤 ３ｄ 沈澱汚泥回収槽 ３ｅ 越流堰（越流排出手段） ４ 汚泥処理槽 ５ 土留め ７ 濁水 ８ 越流路（第１越流導入手段） ９ 土粒子凝集促進材投入装置 １１ 中仕切壁（仕切壁） １２ 混合液 １２ａ フロッグ（土粒子凝集体） １３ 汚泥 １５ 圧送ポンプ DESCRIPTION OF SYMBOLS 1 Raw water tank 2 Stirring tank 2bb Downstream side part (2nd overflow introduction means) 3 Sedimentation tank 3a, b Side wall 3c Bottom board 3d Settled sludge collection tank 3e Overflow weir (overflow discharge means) 4 Sludge treatment tank 5 Earth retaining 7 Turbid Water 8 Overflow Channel (First Overflow Introducing Means) 9 Soil Particle Aggregation Promoting Material Injection Device 11 Middle Partition Wall (Partition Wall) 12 Mixed Solution 12a Frog (Soil Particle Aggregate) 13 Sludge 15 Pressure Pump
───────────────────────────────────────────────────── フロントページの続き (72)発明者 芦野 勝邦 神奈川県茅ケ崎市高田３−１−２ (72)発明者 森 雅人 山形県新庄市小田島町７−36 (72)発明者 澁谷 宏 神奈川県横浜市保土ケ谷区上菅田町1190 澁谷建設株式会社内 (72)発明者 瀬谷 藤夫 福島県いわき市泉ケ丘１−21−20 (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 1/52 C02F 11/12 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Katsukuni Ashino 3-1-2 Takada, Chigasaki-shi, Kanagawa (72) Inventor Masato Mori 7-36, Odashimacho, Shinjo-shi, Yamagata (72) Inventor Hiroshi Shibuya, Kanagawa 1190 Kasugada-machi, Hodogaya-ku, Yokohama-shi Shibuya Construction Co., Ltd. (72) Inventor Fujio Seya 1-2-21-20 Izumigaoka, Iwaki-shi, Fukushima Prefecture (58) Field surveyed (Int. Cl. 7 , DB name) C02F 1/52 C02F 11/12
Claims (10)
れる現場備え付け式の原水槽と、 この原水槽からの前記濁水と土粒子凝集促進材とが供給
されこれらを攪拌混合して混合液とする現場備え付け式
の攪拌槽と、 前記混合液が供給され、前記土粒子成分が前記土粒子凝
集促進材と反応して生成した土粒子凝集体を沈澱させて
汚泥とする現場備え付け式の沈澱槽と、 前記沈澱槽に沈澱した前記汚泥と改質材とが導入され、
これらを攪拌混合し前記汚泥の性状を変えて改良土とす
る現場備え付け式の汚泥処理槽と、 この汚泥処理槽に設けられ、前記汚泥に含まれる水分を
分離して排出する透水性の土留めとを有することを特徴
とする濁水処理システム。1. An on-site installed raw water tank into which turbid water containing a soil particle component and a water component is introduced, and the turbid water and the soil particle aggregation promoting material from the raw water tank are supplied and mixed by stirring and mixing. A liquid-supplied on-site stirring tank, and the mixed liquid is supplied, and the soil-particle component reacts with the soil-particle aggregation-promoting material to precipitate generated soil-particle agglomerates and to provide sludge as sludge. A settling tank, the sludge settled in the settling tank and a modifier are introduced,
These are stirred and mixed to change the properties of the sludge to improve the soil to provide an improved soil, and a sludge treatment tank mounted on the site, and a water-permeable soil retaining device provided in the sludge treatment tank for separating and discharging water contained in the sludge. And a turbid water treatment system comprising:
て、前記沈澱槽は、周囲を取り囲む側壁と、底盤と、こ
の底盤をさらに下方に堀込むように設けられ、前記沈澱
する汚泥を導入して集積・回収する沈澱汚泥回収槽と、
前記側壁の一部を切り欠くように設けられ、前記沈澱槽
内の前記混合液のうち所定水位を超えたオーバーフロー
部分を前記沈澱槽外へと排出する越流排出手段とを備え
ていることを特徴とする濁水処理システム。2. The turbid water treatment system according to claim 1, wherein the sedimentation tank is provided so as to enclose the side wall surrounding the periphery, a bottom plate, and the bottom plate is dug further downward, and introduces the settling sludge to accumulate and collect the sludge. A settling sludge collection tank to be collected;
An overflow discharge means provided so as to cut out a part of the side wall and discharging an overflow portion of the mixed solution in the sedimentation tank exceeding a predetermined water level to the outside of the sedimentation tank. Features a turbid water treatment system.
おいて、前記沈澱槽内の前記汚泥を前記汚泥処理槽へと
圧送する圧送ポンプを有することを特徴とする濁水処理
システム。3. The turbid water treatment system according to claim 1, further comprising a pump for pumping the sludge in the settling tank to the sludge treatment tank.
て、前記原水槽内の前記濁水のうち所定水位を超えたオ
ーバーフロー部分を前記攪拌槽へと自然流下させる第１
越流導入手段と、前記攪拌槽内の前記混合液のうち所定
水位を超えたオーバーフロー部分を前記沈澱槽へと自然
流下させる第２越流導入手段とを有することを特徴とす
る濁水処理システム。4. The turbid water treatment system according to claim 1, wherein an overflow portion of the turbid water in the raw water tank that exceeds a predetermined water level flows down naturally to the stirring tank.
A turbid water treatment system comprising: overflow introduction means; and second overflow introduction means for causing an overflow portion of the mixed solution in the stirring tank, which exceeds a predetermined water level, to flow naturally into the precipitation tank.
て、前記沈澱槽の流路幅を、前記第２越流導入手段の幅
よりも大きくしたことを特徴とする濁水処理システム。5. The turbid water treatment system according to claim 4, wherein the width of the flow path of the settling tank is larger than the width of the second overflow introducing means.
て、前記第１越流導入手段における通過流量に応じ前記
土粒子凝集促進材を投入する土粒子凝集促進材投入装置
を有することを特徴とする濁水処理システム。6. A turbid water treatment system according to claim 4, further comprising a soil particle coagulation accelerator input device for inputting said soil particle coagulation accelerator according to a flow rate of said first overflow introduction means. Turbid water treatment system.
おいて、前記攪拌槽内に上部から差し込むように設けら
れ、前記攪拌槽内の前記混合液のうち上部水面付近を混
合液導入側と混合液排出側とに仕切る仕切壁を有するこ
とを特徴とする濁水処理システム。7. The turbid water treatment system according to claim 1, wherein the turbid water treatment system is provided so as to be inserted into the stirring tank from above, and mixes the vicinity of an upper water surface of the mixture in the stirring tank with a mixture introduction side. A turbid water treatment system having a partition wall for partitioning a liquid discharge side.
に導入し、この原水槽からの前記濁水に土粒子凝集促進
材を添加し攪拌槽内で攪拌混合して混合液とし、この混
合液において前記土粒子成分が前記土粒子凝集促進材と
反応して生成した土粒子凝集体を沈澱槽内で沈澱させて
汚泥とし、この沈澱した汚泥を汚泥処理槽に導入した
後、該汚泥処理槽に設けた透水性の土留めを介し前記汚
泥に含まれる水分を分離して排出するとともに、前記汚
泥処理槽に改質材を添加して攪拌混合し前記汚泥の性状
を変えて改良土とすることを特徴とする濁水処理方法。8. A turbid water containing a soil particle component and a water component is introduced into a raw water tank, a soil particle aggregation promoting material is added to the turbid water from the raw water tank, and the mixture is stirred and mixed in a stirring tank to form a mixed solution. In the mixed liquid, the soil particle component reacts with the soil particle aggregation promoting material to precipitate soil particle aggregates formed in a sedimentation tank to form sludge. After introducing the precipitated sludge into a sludge treatment tank, the sludge The water contained in the sludge is separated and discharged through a permeable soil retaining provided in the treatment tank, and a modifier is added to the sludge treatment tank and mixed with stirring to change the properties of the sludge and improve the soil. And a method for treating turbid water.
澱槽の底盤の下方に堀込むように設けた沈澱汚泥回収槽
に前記沈澱する汚泥を導入して集積・回収しつつ、前記
沈澱槽内の前記混合液のうち所定水位を超えたオーバー
フロー部分を越流排出手段を介して前記沈澱槽外へと排
出することを特徴とする濁水処理方法。9. The method for treating turbid water according to claim 8, wherein the sludge to be settled is introduced into a settling sludge recovery tank provided so as to be dug below the bottom of the settling tank while collecting and collecting the sludge. A turbid water treatment method, wherein an overflow portion of the mixed liquid exceeding a predetermined water level is discharged to outside the sedimentation tank via overflow discharge means.
いて、前記沈澱槽内の前記汚泥を前記汚泥処理槽へと圧
送することを特徴とする濁水処理方法。10. The turbid water treatment method according to claim 8, wherein the sludge in the settling tank is pumped to the sludge treatment tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11169468A JP3031912B1 (en) | 1999-06-16 | 1999-06-16 | Turbid water treatment system and turbid water treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11169468A JP3031912B1 (en) | 1999-06-16 | 1999-06-16 | Turbid water treatment system and turbid water treatment method |
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| Publication Number | Publication Date |
|---|---|
| JP3031912B1 true JP3031912B1 (en) | 2000-04-10 |
| JP2000354876A JP2000354876A (en) | 2000-12-26 |
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| JP5349551B2 (en) * | 2011-07-25 | 2013-11-20 | 中国電力株式会社 | Structure for sedimentation, sedimentation pond construction method, and waterway recovery method |
| JP5492268B2 (en) * | 2012-09-10 | 2014-05-14 | 株式会社テルナイト | Method for producing modified clay |
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