JPH11169608A - Ascending current type flocculating and settling apparatus - Google Patents
Ascending current type flocculating and settling apparatusInfo
- Publication number
- JPH11169608A JPH11169608A JP9338395A JP33839597A JPH11169608A JP H11169608 A JPH11169608 A JP H11169608A JP 9338395 A JP9338395 A JP 9338395A JP 33839597 A JP33839597 A JP 33839597A JP H11169608 A JPH11169608 A JP H11169608A
- Authority
- JP
- Japan
- Prior art keywords
- contact material
- material accumulation
- raw water
- small
- coagulation
- 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.)
- Pending
Links
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、上昇流式凝集沈殿
装置に関し、更に詳細には、洗浄間隔を短くしないで、
濁度の低い処理水を流出させることができ、しかも小型
化を図った上昇流式凝集沈殿装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upflow coagulation / sedimentation apparatus, and more particularly, to an apparatus for cleaning an upflow type coagulation / sedimentation apparatus without shortening a cleaning interval.
The present invention relates to an upflow coagulating sedimentation apparatus capable of discharging treated water having a low turbidity and achieving downsizing.
【０００２】[0002]
【従来の技術】河川水などを原水とし、水処理して上水
や工業用水を製造する場合、又は公共下水及び工場廃水
等の排水を基準のレベルまで水処理する場合等に用いる
水処理装置として、凝集沈殿性能及び濾過性能が高く、
しかも運転が容易である等の理由から、いわゆる上昇流
式凝集沈殿装置が採用されることが多い。上昇流式凝集
沈殿装置は、原水に凝集剤を添加する添加手段と、添加
手段の下流に設けられ、空隙率の大きな小片接触材を集
積させてなる接触材集積層を有し、接触材集積層内を上
向流で原水を流して、原水中の懸濁物を凝集、沈殿させ
る凝集沈殿手段とから構成されている。2. Description of the Related Art A water treatment apparatus used in the case where river water or the like is used as raw water and water is treated to produce clean water or industrial water, or when wastewater such as public sewage and industrial wastewater is treated to a standard level. As agglomerated sedimentation performance and filtration performance are high,
In addition, a so-called upflow type coagulating sedimentation apparatus is often employed for reasons such as easy operation. The upflow coagulating sedimentation apparatus has an adding means for adding a coagulant to raw water, and a contact material accumulation layer provided downstream of the adding means and accumulating small piece contact materials having a high porosity. A coagulating sedimentation means for flowing raw water in the stack in an upward flow to coagulate and precipitate a suspension in the raw water.
【０００３】ここで、図４を参照して、従来の上昇流式
凝集沈殿装置の構成及び運転を説明する。図４は従来の
上昇流式凝集沈殿装置の構成を示すフローシートであ
る。従来の上昇流式凝集沈殿装置１０は、図４に示すよ
うに、原水槽１２と、原水槽１２から原水を汲み出し、
送水する原水ポンプ１４と、凝集剤添加装置１６と、薬
品混和槽１８と、凝集沈殿槽２０とを備えている。凝集
剤添加装置１６は、原水の濁度を測定する濁度計２２
と、凝集剤槽２４と、濁度計２２の下流の原水供給管２
６に凝集剤槽２４から凝集剤を注入する凝集剤ポンプ２
８とを備え、濁度計２２の計測値に基づいて所要の凝集
剤を原水に注入する。薬品混和槽１８は、攪拌機２９を
備えた容器であって、凝集剤が注入された原水を一次的
に滞留させ、攪拌機２９により原水を攪拌して、原水と
凝集剤とを急速混和し、流入管３０を介して原水を凝集
沈殿槽２０に流入させる。[0003] The configuration and operation of a conventional upflow coagulation sedimentation apparatus will be described with reference to FIG. FIG. 4 is a flow sheet showing the configuration of a conventional upflow coagulation / sedimentation apparatus. As shown in FIG. 4, a conventional upflow coagulating sedimentation apparatus 10 pumps raw water from a raw water tank 12 and raw water tank 12,
A raw water pump 14 for feeding water, a coagulant adding device 16, a chemical mixing tank 18, and a coagulation sedimentation tank 20 are provided. The coagulant adding device 16 includes a turbidity meter 22 for measuring turbidity of raw water.
, A coagulant tank 24, and a raw water supply pipe 2 downstream of the turbidimeter 22.
Coagulant pump 2 for injecting coagulant from coagulant tank 24
And a required coagulant is injected into the raw water based on the measurement value of the turbidimeter 22. The chemical mixing tank 18 is a container provided with a stirrer 29, in which the raw water into which the coagulant has been injected is temporarily retained, and the raw water is stirred by the stirrer 29, so that the raw water and the coagulant are rapidly mixed and flowed. The raw water flows into the flocculation settling tank 20 via the pipe 30.
【０００４】凝集沈殿槽２０は、原水中の懸濁物が凝集
剤によって粗大化した凝集フロックを凝集、分離する槽
であって、図５に示すように、下から、順次、区画され
た原水の流入ゾーン３２、接触材集積ゾーン３４、集水
ゾーン３６とから構成されている。接触材集積ゾーン３
４は、ゾーンの上部及び下部に設けられた目板状の流出
防止板３８、４０で区画され、その間の領域に、空隙率
の大きな小片接触材、例えば、図６に示すような短尺チ
ューブ形状の比較的比重の小さいプラスチック製小片接
触材４２を多数収容し、原水の上向流により上部流出防
止板３８の下に接触材集積層４４を形成するようになっ
ている。集水ゾーン３６は、接触材集積ゾーン３４を流
過して処理された処理水を集水する領域であって、接触
材集積ゾーン３４の流出防止板３８の直ぐ上に設けられ
た集水部４６と、集水部４６の上端から溢流する処理水
を集める集水トラフ４８と、集水トラフ４８に接続され
て、処理水を流出させる流出管５０とから構成され、処
理水を処理水槽５２に送水する。[0004] The coagulation sedimentation tank 20 is a tank for coagulating and separating coagulated flocs in which a suspension in raw water is coarsened by a coagulant, and as shown in FIG. , A contact material accumulation zone 34, and a water collecting zone 36. Contact material accumulation zone 3
Numeral 4 is defined by eyelet-shaped outflow prevention plates 38 and 40 provided at the upper and lower portions of the zone, and a small piece contacting material having a large porosity, for example, a short tube shape as shown in FIG. The contact material accumulation layer 44 is formed under the upper outflow prevention plate 38 by the upward flow of the raw water. The water collecting zone 36 is an area for collecting the treated water that has been processed by flowing through the contact material accumulation zone 34, and is provided directly above the outflow prevention plate 38 of the contact material accumulation zone 34. 46, a collecting trough 48 for collecting treated water overflowing from the upper end of the collecting part 46, and an outflow pipe 50 connected to the collecting trough 48 for discharging the treated water. Water is supplied to 52.
【０００５】流入ゾーン３２には、薬品混和槽１８から
出た原水が流入管３０を介して流入する。流入管３０
は、流入ゾーン３２の中央に貫入して下向きの開口を先
端に備えている。流入管３０の開口の下方には、下向き
に流入した原水の向きを上方に変えるために、傘を逆に
した形状の変流板５４が設けてある。また、流入管３０
には、アルカリ剤注入管５６が接続され、必要に応じて
アルカリ溶液を注入して原水のｐＨを調整するようにな
っている。流入ゾーン３２の底部、即ち変流板５４の下
方は、汚泥を集積するために逆円錐状の汚泥貯留ゾーン
５８になっていて、汚泥を排出する排泥管６０がその最
下部に接続されている。また、流入ゾーン３２の上部に
は、上方に向け空気を噴射する空気ノズルを多数備えた
空気供給管６２が設けられ、空気ブロアー６４で送入さ
れた空気を噴出して、接触材集積ゾーン３４の接触材４
２を攪拌洗浄するようになっている。The raw water from the chemical mixing tank 18 flows into the inflow zone 32 through the inflow pipe 30. Inflow pipe 30
Has a downward opening at the tip that penetrates the center of the inflow zone 32. Below the opening of the inflow pipe 30, a current changing plate 54 having an inverted umbrella is provided in order to change the direction of raw water flowing downward into an upward direction. In addition, the inflow pipe 30
Is connected to an alkaline agent injection pipe 56, and an alkaline solution is injected as needed to adjust the pH of the raw water. The bottom of the inflow zone 32, that is, below the current transformer plate 54, is an inverted conical sludge storage zone 58 for accumulating sludge, and a sludge discharge pipe 60 for discharging sludge is connected to the lowermost portion. I have. An air supply pipe 62 provided with a large number of air nozzles for injecting air upward is provided above the inflow zone 32, and ejects the air sent in by an air blower 64 to form a contact material accumulation zone 34. Contact material 4
2 is washed by stirring.
【０００６】凝集沈殿槽２０では、凝集剤が添加された
原水は、先ず、流入ゾーン３２に流入する。流入ゾーン
３２では、原水中の懸濁物が凝集して形成されたフロッ
クのうち比較的大きなフロックが、先ず、沈降分離す
る。次いで、原水は接触材集積ゾーン３４に流入する。
そこでは、原水中の残りの微細なフロックが接触材と接
触して接触材表面に付着したり、あるいは接触材と接触
材との間隙に捕捉されたりして、原水から懸濁物が分離
される。処理水は上部の集水ゾーン３６から処理水槽５
２に流出する。接触材４２に付着した、あるいは接触材
４２間に捕捉されたフロックは、後続する微細フロック
との接触等によって徐々に成長し、フロック径が大きく
なる。そして、原水の上昇流速より沈降速度が大きいフ
ロックが形成されるにつれて、このフロックが、原水の
流れによって接触材４２から剥離し、原水の流れに逆ら
って沈降して、汚泥貯留ゾーン５８に堆積し、次いで排
泥管６０により排出される。In the coagulation sedimentation tank 20, the raw water to which the coagulant has been added first flows into the inflow zone 32. In the inflow zone 32, relatively large flocs of flocs formed by agglomeration of the suspension in the raw water first settle and separate. Next, the raw water flows into the contact material accumulation zone 34.
There, the remaining fine flocs in the raw water come into contact with the contact material and adhere to the surface of the contact material, or are trapped in the gap between the contact materials, and the suspended matter is separated from the raw water. You. The treated water is supplied from the upper collecting zone 36 to the treated water tank 5.
Flow out to 2. The floc attached to the contact material 42 or captured between the contact materials 42 gradually grows due to the contact with the subsequent fine floc and the like, and the floc diameter increases. Then, as a floc whose sedimentation velocity is larger than the rising velocity of the raw water is formed, the floc is separated from the contact material 42 by the flow of the raw water, settles against the flow of the raw water, and accumulates in the sludge storage zone 58. Then, it is discharged by the drain pipe 60.
【０００７】[0007]
【発明が解決しようとする課題】上述の上昇流式凝集沈
殿装置に設けられた、小片接触材の集積からなる接触材
集積層は、原水中の懸濁粒子を凝集、沈殿させる機能に
加えて、更に、原水を濾過する機能も有し、濁度の低い
処理水を流出させることできるので、上昇流式凝集沈殿
装置は、比較的小型の装置で、原水の濁度を効率良く低
下させることができると評価されている。しかし、上昇
流式凝集沈殿装置は、従来の砂濾過器等の濾過装置で濾
過して得た濾過水に比べて濁度が高いと言う問題があっ
た。The contact material accumulating layer provided in the upflow coagulating sedimentation apparatus, which is composed of a small piece of contact material, is capable of coagulating and precipitating suspended particles in raw water. Furthermore, since it has a function of filtering raw water and can discharge treated water with low turbidity, the upflow coagulation and sedimentation device is a relatively small device that can efficiently reduce the turbidity of raw water. It is evaluated that it can be. However, the upflow coagulating sedimentation apparatus has a problem that turbidity is higher than filtered water obtained by filtration with a conventional filtration apparatus such as a sand filter.
【０００８】そこで、本発明の目的は、従来の上昇流式
凝集沈殿装置に比べて、濁度の低い処理水を得ることが
できる上昇流式凝集沈殿装置を提供することである。Accordingly, an object of the present invention is to provide an upflow coagulation / sedimentation apparatus capable of obtaining treated water having a lower turbidity than a conventional upflow coagulation / sedimentation apparatus.
【０００９】[0009]
【課題を解決するための手段】ところで、濾過機能は、
濾材の形状、寸法により大きく影響され、例えば濁度に
関しては、濾材の大きさが小さいほど、濾過水の濁度が
低くなる。例えば、砂濾過器では、濾材として粒径０．
５〜１mm程度の小さい砂を使用しているので、濾過水の
濁度が低くなる。本接触材集積層の場合にも、小さい小
片接触材を使用すれば、粒径の大きな懸濁粒子に加えて
小さな懸濁粒子を捕捉することができるので、懸濁物除
去率が大きくなって、処理水の濁度が低下する。しか
し、あまり小さい小片接触材を用いると、単位体積当た
りの接触材集積層に捕捉できる懸濁物の総量が減少し
て、接触材集積層の洗浄間隔が短くなるために、処理能
力の低下、即ち原水の通水量が減少するという問題があ
る。そこで、本発明者は、複数層の接触材集積層を備
え、それぞれの接触材集積層を構成する小片接触材の形
状、寸法を相互に異ならせて、各接触材集積層で捕捉で
きる懸濁粒子の粒径及び捕捉量を調整することにより、
上昇流式凝集沈殿装置の懸濁物の捕捉総量を減少させる
ことなく、即ち接触材集積層の洗浄間隔を短くすること
なく、濁度の低い処理水を得ることを着想し、実験を重
ねて、本発明を完成するに到った。Means for Solving the Problems By the way, the filtering function is as follows.
The turbidity is greatly affected by the shape and size of the filter medium. For example, the smaller the size of the filter medium, the lower the turbidity of the filtered water. For example, in the case of a sand filter, the particle size of a filter material is 0.
Since small sand of about 5 to 1 mm is used, the turbidity of filtered water is reduced. Also in the case of the present contact material accumulation layer, if small contact material is used, small suspended particles can be trapped in addition to large suspended particles, so that the suspended matter removal rate increases. And the turbidity of the treated water decreases. However, when the small contact material is too small, the total amount of the suspension that can be trapped in the contact material accumulation layer per unit volume decreases, and the cleaning interval of the contact material accumulation layer becomes short. That is, there is a problem that the flow rate of raw water decreases. Therefore, the present inventor has provided a plurality of contact material accumulation layers, and made the shape and dimensions of the small piece contact materials constituting each contact material accumulation layer different from each other so that each contact material accumulation layer could capture the suspended particles. By adjusting the particle size and capture amount of the particles,
The idea was to obtain treated water with low turbidity without reducing the total amount of suspended solids trapped in the upflow coagulating sedimentation apparatus, that is, without shortening the washing interval of the contact material accumulation layer. Thus, the present invention has been completed.
【００１０】上記目的を達成するために、上述の知見に
基づいて、本発明に係る上昇流式凝集沈殿装置は、原水
に凝集剤を添加する添加手段と、添加手段の下流に設け
られ、空隙率の大きな小片接触材を集積させてなる接触
材集積層を有し、接触材集積層内を上向流で原水を流し
て、原水中の懸濁物を凝集、沈殿させる凝集沈殿手段と
からなる上昇流式凝集沈殿装置において、凝集沈殿手段
が、複数層の接触材集積層を原水の流れ方向に直列に備
え、かつ接触材集積層を構成する小片接触材の形状及び
寸法の少なくとも一方が接触材集積層相互間で異なるこ
とを特徴としている。In order to achieve the above object, based on the above findings, an upflow coagulation sedimentation apparatus according to the present invention is provided with an addition means for adding a coagulant to raw water, A contact material accumulating layer formed by accumulating a small piece of contact material having a high rate, and raw water flowing in the contact material accumulating layer in an upward flow to coagulate and precipitate a suspension in the raw water from the coagulating sedimentation means. In the upward flow type coagulation sedimentation apparatus, the coagulation sedimentation means includes a plurality of contact material accumulation layers in series in the flow direction of raw water, and at least one of the shape and size of the small piece contact material constituting the contact material accumulation layer is It is characterized in that it differs between the contact material integrated layers.
【００１１】複数層の接触材集積層は、それぞれの接触
材集積層を構成する小片接触材が相互に混じり合わない
目開きの多孔状仕切り板により間仕切りされている。本
発明では、基本的には、寸法の小さい小片接触材は、粒
径の小さな懸濁粒子を捕捉し、寸法の大きな小片接触材
は粒径の大きな懸濁粒子を捕捉する。また、小片接触材
には、接触材が密に集積するような形状、例えば中空球
等の形状、或いは粗に集積するような形状、例えば突起
が外表面に設けてあるような形状等があって、密に集積
する形状の小片接触材は、粒径の小さな懸濁粒子を捕捉
し、粗に集積するような形状の小片接触材は、粒径の大
きな懸濁粒子を捕捉する。これにより小片接触材の寸法
及び形状の少なくとも一方を変えることにより、捕捉で
きる懸濁粒子の大きさを変えることができる。また、本
発明では、大きな寸法又は粗に集積する形状の小片接触
材、即ち目詰まりし難い、即ち洗浄間隔の長い小片接触
材からなる接触材集積層で、捕捉懸濁物の大きな割合を
占める大きな粒径の懸濁粒子を捕捉するので、接触材集
積層の洗浄間隔は短くならない。[0011] The plurality of contact material accumulation layers are partitioned by an apertured porous partition plate in which the small piece contact materials constituting each contact material accumulation layer do not mix with each other. In the present invention, basically, the small-sized particle contact material captures suspended particles having a small particle size, and the large-sized particle contact material captures suspended particles having a large particle size. Further, the small piece contact material has a shape in which the contact material is densely accumulated, for example, a shape of a hollow sphere or the like, or a shape in which the contact material is roughly accumulated, for example, a shape in which projections are provided on an outer surface. In addition, the small-particle contact material having a densely collected shape captures suspended particles having a small particle diameter, and the small-particle contact material having a shape that roughly collects captures suspended particles having a large particle size. By changing at least one of the size and the shape of the small piece contact material, the size of the suspended particles that can be captured can be changed. Further, in the present invention, a large proportion of the trapped suspension is occupied by the contact material accumulation layer composed of the small contact material having a large size or a coarsely accumulated shape, that is, a small contact material that is hardly clogged, that is, has a long cleaning interval. Since the suspended particles having a large particle diameter are captured, the cleaning interval of the contact material accumulation layer is not shortened.
【００１２】また、各接触材集積層を構成する小片接触
材の寸法及び形状について接触材集積層間では制約はな
いものの、好適には、原水の流れ方向に見て、下流に位
置する接触材集積層を構成する小片接触材は、それより
上流に位置する接触材集積層を構成する小片接触材と同
じ形状であって、かつ寸法が小さいようにする。これに
より、上流の接触材集積層によって原水中の比較的大き
な懸濁粒子を凝集、沈殿させ、次いで上流の接触材集積
層を通過した微小な懸濁粒子を下流の接触材集積層で凝
集させ、沈殿させ、かつ濾過して濁度の低い処理水を流
出させることができる。即ち、上流の接触材集積層で懸
濁物を粗取りし、中流の接触材集積層で懸濁物の残りを
捕捉し、下流の接触材集積層で仕上げ捕捉する。The size and shape of the small piece contact material constituting each contact material accumulation layer are not limited between the contact material accumulation layers, but preferably, the contact material collection located downstream in the flow direction of the raw water. The small piece contact material constituting the laminate has the same shape and small dimensions as the small piece contact material constituting the contact material integrated layer located upstream thereof. Thereby, the relatively large suspended particles in the raw water are aggregated and precipitated by the upstream contact material accumulation layer, and then the minute suspended particles passing through the upstream contact material accumulation layer are aggregated by the downstream contact material accumulation layer. , Settling, and filtering out the treated water with low turbidity. That is, the suspended matter is roughly removed by the upstream contact material accumulation layer, the remainder of the suspension is captured by the middle contact material accumulation layer, and the final suspension is captured by the downstream contact material accumulation layer.
【００１３】接触材集積層を形成する空間は、小片接触
材が集積した接触材集積層自体に要する体積と、接触材
集積層の体積の１．２〜２．０倍程度の自由空間とから
構成されている。自由空間は、懸濁物の捕捉能力が低下
した小片接触材を空気により流動させて洗浄する際に必
要な空間である。従って、接触材集積層を複数層設けた
場合、接触材集積層毎に自由空間が必要になり、しか
も、自由空間は、上述のように、接触材集積層自体に要
する体積に比べても大きな体積を要するので、凝集沈殿
槽の槽高が高くなるという問題がある。The space in which the contact material integrated layer is formed depends on the volume required for the contact material integrated layer itself on which the small piece contact material is accumulated and the free space of about 1.2 to 2.0 times the volume of the contact material integrated layer. It is configured. The free space is a space that is required when the small piece contacting material having a reduced ability to capture a suspension is caused to flow by air and washed. Therefore, when a plurality of contact material accumulation layers are provided, a free space is required for each contact material accumulation layer, and the free space is larger than the volume required for the contact material accumulation layer itself as described above. Since a large volume is required, there is a problem that the height of the coagulation sedimentation tank is increased.
【００１４】そこで、本発明の好適な実施態様では、複
数層の接触材集積層が縦型容器内に上下に多層で設けて
あって、接触材集積層の間には、それぞれの接触材集積
層を構成する小片接触材が相互に混じり合わない目開き
の多孔状仕切り板が設けてあり、かつ仕切り板が、縦型
容器内で上下に昇降自在になっている。仕切り板を昇降
させる手段は、既知の手段を使用でき、例えば仕切り板
にシャフトを設け、既知の機械的手段でシャフトを昇降
させ、これにより仕切り板を昇降させる。接触材集積層
を洗浄する際には、仕切り板を上下して各接触材集積層
の下に自由空間を確保し、小片接触材を流動させること
により、洗浄効果を高めることができる。Therefore, in a preferred embodiment of the present invention, a plurality of contact material accumulation layers are provided in a vertical container in a vertical multi-layer structure, and each contact material accumulation layer is provided between the contact material accumulation layers. There is provided a porous partition plate having openings in which the small piece contacting materials constituting the laminate are not mixed with each other, and the partition plate is vertically movable up and down in the vertical container. As means for raising and lowering the partition plate, known means can be used. For example, a shaft is provided on the partition plate, and the shaft is raised and lowered by known mechanical means, thereby raising and lowering the partition plate. When cleaning the contact material accumulation layer, the partitioning plate is moved up and down to secure a free space below each contact material accumulation layer, and the cleaning effect can be enhanced by flowing the small piece contact material.
【００１５】[0015]
【発明の実施の形態】以下に、実施形態例を挙げ、添付
図面を参照して、本発明の実施の形態を具体的かつ詳細
に説明する。実施形態例１ 本実施形態例は、本発明に係る凝集沈殿濾過装置の実施
形態の一例であって、図１は本実施形態例の凝集沈殿濾
過装置の要部、即ち凝集沈殿槽の構成を示す模式図であ
る。本実施形態例の上昇流式凝集沈殿装置は、図５に示
す凝集沈殿槽２０に代えて、図１に示す構成の凝集沈殿
槽７０を備えていることを除いて、図４に示す上昇流式
凝集沈殿装置と同じ構成を備えている。凝集沈殿槽７０
は、図１に示すように、下から上に向かって、順次、区
画された原水の流入ゾーン７２、第１接触材集積ゾーン
７４、第２接触材集積ゾーン７６、集水ゾーン７８とか
ら構成されている。流入ゾーン７２及び集水ゾーン７８
は、それぞれ、図５に示す凝集沈殿槽２０の流入ゾーン
３２及び集水ゾーン３６と同じ構成を備えている。Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Embodiment 1 This embodiment is an example of an embodiment of a coagulation-sedimentation filtration apparatus according to the present invention, and FIG. 1 shows a main part of the coagulation-sedimentation filtration apparatus of this embodiment, that is, a configuration of a coagulation-sedimentation tank. FIG. The upflow coagulation / sedimentation apparatus of the present embodiment is provided with an upflow coagulation / sedimentation tank shown in FIG. 4 except that a coagulation / sedimentation tank having the configuration shown in FIG. It has the same configuration as the coagulating sedimentation apparatus. Coagulation sedimentation tank 70
As shown in FIG. 1, from the bottom upward, the raw water is composed of a raw water inflow zone 72, a first contact material accumulation zone 74, a second contact material accumulation zone 76, and a water collection zone 78. Have been. Inflow zone 72 and water collection zone 78
Each has the same configuration as the inflow zone 32 and the water collection zone 36 of the coagulation sedimentation tank 20 shown in FIG.
【００１６】第１接触材集積ゾーン７４は、第１接触材
集積ゾーン７４の下部に設けられた目板状の第１流出防
止板８０と、第２接触材集積ゾーン７６との境界に設け
られた目板状の仕切り板８２とによって区画され、その
間の領域に、図６に示すような空隙率の大きい短尺チュ
ーブ形状の比較的比重の小さいプラスチック製小片接触
材４２を多数収容し、原水の上向流により仕切り板８２
の下に第１接触材集積層８４を形成するようになってい
る。The first contact material accumulation zone 74 is provided at a boundary between a first plate-like outflow prevention plate 80 provided below the first contact material accumulation zone 74 and a second contact material accumulation zone 76. A large number of small-sized plastic small-piece contact materials 42 in the form of a short tube having a large porosity as shown in FIG. Partition plate 82 by upward flow
The first contact material accumulation layer 84 is formed below the first contact material accumulation layer 84.
【００１７】第２接触材集積ゾーン７６は、第１接触材
集積ゾーン７４との境界に設けられた仕切り板８２と、
第２接触材集積ゾーン７６の上部に設けられた目板状の
第２流出防止板８６とによって区画され、その間の領域
に、第１接触材集積ゾーン７６の小片接触材４２と相似
であって、寸法の小さいプラスチック製小片接触材を多
数収容し、原水の上向流により第２流出防止板８６の下
に第２接触材集積層８８を形成するようになっている。
仕切り板８２は、第１接触材集積層８４及び第２接触材
集積層８８をそれぞれ構成する小片接触材同士が相互に
混じり合わない目開きの多孔状仕切り板、例えば金網板
である。The second contact material accumulation zone 76 includes a partition plate 82 provided at a boundary with the first contact material accumulation zone 74,
The second contact material accumulation zone 76 is provided with a second plate-like second outflow prevention plate 86 provided above the second contact material accumulation zone 76, and an area therebetween is similar to the small piece contact material 42 of the first contact material accumulation zone 76. A large number of small contact pieces made of plastic are accommodated, and a second contact material accumulation layer 88 is formed below the second outflow prevention plate 86 by upward flow of raw water.
The partition plate 82 is an apertured porous partition plate, for example, a wire mesh plate, in which the small piece contact materials constituting the first contact material accumulation layer 84 and the second contact material accumulation layer 88 do not mix with each other.
【００１８】本実施形態例では、原水は、第１接触材集
積層８４に流入し、そこで原水中のかなりのフロックは
小片接触材と接触して接触材表面及び内面、更には複数
個の接触材によって形成される間隙に捕捉される。次い
で、原水は、第２接触材集積層８８に流入し、そこで、
未捕捉の微小フロック及び凝集剤と未反応の懸濁物質が
より小さい接触材により凝集、沈殿及び濾過され、ほぼ
完全に捕捉される。従って、第２接触材集積層８８から
流出する処理水の濁度は、従来の上昇流式凝集沈殿装置
から流出する処理水に比べて遙に低い。しかも、懸濁物
の大部分を占める粒径の大きな懸濁粒子は、寸法の大き
な小片接触材で構成された第１接触材集積層８４に捕捉
されるので、第２接触材集積層８８の目詰まりも著しく
なく、洗浄間隔は短くならない。In the present embodiment, the raw water flows into the first contact material accumulation layer 84, where a considerable amount of floc in the raw water contacts the small contact material and contacts the surface and inner surface of the contact material, as well as a plurality of contact materials. It is trapped in the gap formed by the material. Then, the raw water flows into the second contact material accumulation layer 88, where
Unreacted microfloc and flocculant and unreacted suspended matter are flocculated, precipitated and filtered by the smaller contact material, and are almost completely captured. Therefore, the turbidity of the treated water flowing out of the second contact material accumulation layer 88 is much lower than that of the treated water flowing out of the conventional upflow coagulating sedimentation apparatus. In addition, the large suspended particles occupying the majority of the suspended matter are captured by the first contact material accumulation layer 84 composed of the large-sized small piece contact material, so that the second contact material accumulation layer 88 There is no noticeable clogging and the cleaning interval is not short.
【００１９】実施形態例２ 本実施形態例は、本発明に係る凝集沈殿濾過装置の実施
形態の別の例であって、図２は本実施形態例の凝集沈殿
濾過装置の要部、即ち凝集沈殿槽の構成を示す模式図で
ある。本実施形態例の上昇流式凝集沈殿装置は、図５に
示す凝集沈殿槽２０に代えて、図２に示す構成の凝集沈
殿槽９０を備えていることを除いて、図４に示す上昇流
式凝集沈殿装置と同じ構成を備えている。凝集沈殿槽９
０は、図２に示すように、下から上に向かって、順次、
区画された原水の流入ゾーン９２、接触材集積ゾーン９
４及び集水ゾーン９６とから構成されている。流入ゾー
ン９２及び集水ゾーン９６は、それぞれ、図５に示す凝
集沈殿槽２０の流入ゾーン３２及び集水ゾーン３６と同
じ構成を備えている。 Embodiment 2 This embodiment is another example of the embodiment of the coagulation / sedimentation / filtration apparatus according to the present invention. FIG. It is a schematic diagram which shows the structure of a sedimentation tank. The upflow coagulation / sedimentation apparatus of the present embodiment is provided with an upflow coagulation / sedimentation tank 90 having the configuration shown in FIG. 2 instead of the coagulation / sedimentation tank 20 shown in FIG. It has the same configuration as the coagulating sedimentation apparatus. Coagulation sedimentation tank 9
0, sequentially from bottom to top, as shown in FIG.
Raw water inflow zone 92 partitioned, contact material accumulation zone 9
4 and a water collecting zone 96. The inflow zone 92 and the water collection zone 96 have the same configuration as the inflow zone 32 and the water collection zone 36 of the coagulation sedimentation tank 20 shown in FIG. 5, respectively.
【００２０】接触材集積ゾーン９４は、第１接触材集積
ゾーン９４の下部及び上部にそれぞれ設けられた目板状
の第１流出防止板９８及び第２流出防止板１００とによ
って区画され、その間の領域に、下から上に向かって、
第１接触材集積層１０２、第２接触材集積層１０４及び
第３接触材集積層１０６を有する。第１接触材集積層１
０２と第２接触材集積層１０４とは、上下に昇降自在な
第１仕切り板１０８によって仕切られ、また、第２接触
材集積層１０４と第３接触材集積層１０６とは、同じく
昇降自在な第２仕切り板１１０によって仕切られてい
る。The contact material accumulation zone 94 is defined by first and second outflow prevention plates 98 and 100 having a plate shape provided at the lower part and the upper part of the first contact material accumulation zone 94, respectively. In the area, from bottom to top,
It has a first contact material accumulation layer 102, a second contact material accumulation layer 104, and a third contact material accumulation layer 106. First contact material accumulation layer 1
02 and the second contact material accumulation layer 104 are partitioned by a first partition plate 108 which can be vertically moved up and down, and the second contact material accumulation layer 104 and the third contact material accumulation layer 106 are also vertically movable. It is partitioned by the second partition plate 110.
【００２１】第１仕切り板１０８及び第２仕切り板１１
０は、それぞれ、第３及び第４仕切り板１０８、１１０
から上方に延在して集水ゾーン９６から上部に突出する
シャフト１１２及び１１４を有する。第２仕切り板１１
０のシャフト１１４は、円筒状のシャフトであって、そ
の内部に第１仕切り板１０８のシャフト１１２を収容
し、第２流出防止板１００を摺動自在に貫通している。
第１仕切り板１０８のシャフト１１２は、第２仕切り板
１１０のシャフト１１４内で自在に昇降する。第１及び
第２仕切り板１０８及び１１０は、既知のラッチ・ピニ
オン機構等の昇降手段１１６をシャフト１１２及び１１
４に備え、昇降手段１１６を駆動することにより上下に
自在に昇降する。図２では、第１及び第２仕切り板１０
８及び１１０は、第２接触材集積層１０４及び第３接触
材集積層１０６をそれぞれ構成するのに必要な体積を、
丁度、確保できる位置に上昇しており、第１接触材集積
層１０２の下部に自由空間が形成されている。First partition plate 108 and second partition plate 11
0 is the third and fourth partition plates 108 and 110, respectively.
Shafts 112 and 114 extending upwardly from and projecting upward from the water collection zone 96. Second partition plate 11
The 0 shaft 114 is a cylindrical shaft, in which the shaft 112 of the first partition plate 108 is accommodated, and slidably penetrates the second outflow prevention plate 100.
The shaft 112 of the first partition plate 108 moves up and down freely within the shaft 114 of the second partition plate 110. The first and second partition plates 108 and 110 are connected to elevating means 116 such as a known latch and pinion mechanism by shafts 112 and 11.
4 to move up and down freely by driving up and down means 116. In FIG. 2, the first and second partition plates 10
8 and 110 are volumes required to form the second contact material integrated layer 104 and the third contact material integrated layer 106, respectively.
It has just risen to a position where it can be secured, and a free space is formed below the first contact material accumulation layer 102.
【００２２】本実施形態例の凝集沈殿槽９０で使用する
小片接触材は、図６に示すような空隙率の大きい短尺チ
ューブ形状の比較的比重の小さいプラスチック製小片接
触材であって、以下に述べるように、第１接触材集積層
１０２から第３接触材集積層１０６に行くに従って、順
次、小さな寸法になっている。第１接触材集積層１０２
を構成する小片接触材は、比重０．９７で直径１０mm×
長さ２０mmのプラスチック製円筒体である。第２接触材
集積層１０４を構成する小片接触材は、比重０．９７で
直径６mm×長さ１０mmのプラスチック製円筒体である。
第３接触材集積層１０６を構成する小片接触材は、比重
０．９７で直径４mm×長さ４mmのプラスチック製円筒体
である。第１仕切り板１０８は、第１接触材集積層１０
２及び第２接触材集積層１０４をそれぞれ構成する小片
接触材同士が混じり合わないように、目開き４mmの目板
又は金網板である。また、第２仕切り板１１０は、第２
接触材集積層１０４及び第３接触材集積層１０６をそれ
ぞれ構成する小片接触材同士が混じり合わないように、
目開き２mmの目板又は金網板である。The small piece contacting material used in the coagulation sedimentation tank 90 of this embodiment is a short piece of plastic having a relatively small specific gravity in the form of a short tube having a large porosity as shown in FIG. As described above, the size gradually decreases from the first contact material integrated layer 102 to the third contact material integrated layer 106. First contact material accumulation layer 102
Is a small piece contact material with a specific gravity of 0.97 and a diameter of 10 mm
It is a plastic cylinder with a length of 20 mm. The small piece contact material constituting the second contact material integrated layer 104 is a plastic cylinder having a specific gravity of 0.97 and a diameter of 6 mm × a length of 10 mm.
The small piece contact material constituting the third contact material integrated layer 106 is a plastic cylinder having a specific gravity of 0.97 and a diameter of 4 mm × a length of 4 mm. The first partition plate 108 includes the first contact material accumulation layer 10.
It is a mesh plate or a wire mesh plate having an aperture of 4 mm so that the small piece contact materials constituting the second and second contact material accumulation layers 104 do not mix with each other. In addition, the second partition plate 110 is a second partition plate.
In order that the small piece contact materials constituting the contact material integrated layer 104 and the third contact material integrated layer 106 do not mix with each other,
It is a mesh plate or a wire mesh plate with a mesh size of 2 mm.
【００２３】原水の通水状態では、第１仕切り板１０８
及び第２仕切り板１１０の位置は、第１、第２及び第３
接触材集積層１０２、１０４、１０６を構成できる限
り、自由であって、例えば、図２では、第１接触材集積
層１０２の下部に自由空間が形成されている。図２に示
す仕切り板１０８、１１０の状態で接触材集積ゾーン９
４を洗浄する時には、第１仕切り板１０８をこの位置に
したままで、洗浄空気をブロワ６４（図５参照）にて吹
き込み、第１接触材集積層１０２の小片接触材を自由空
間で流動させて、小片接触材からフロックや懸濁物を剥
離し、洗浄する。第１接触材集積層１０２の洗浄が終了
した時点で、昇降手段１１６を起動し、シャフト１１２
を介して第１仕切り板１０８を下降させると、それに伴
い第１接触材集積層１０２も下降し、図３（ａ）に示す
ように、第１接触材集積層１０２の下部は第１流出防止
板９８に接する。この結果、第２接触材集積層１０４の
下に自由空間が形成される。ここで、洗浄空気をブロア
６４にて吹き込み、第２接触材集積層１０４の小片接触
材を自由空間内で流動させ、フロックや懸濁物質の剥離
を行う。In the raw water flowing state, the first partition plate 108
And the position of the second partition plate 110 are the first, second and third
As long as the contact material integrated layers 102, 104, and 106 can be formed, the contact material integrated layers are free. For example, in FIG. 2, a free space is formed below the first contact material integrated layer 102. In the state of the partition plates 108 and 110 shown in FIG.
When cleaning the sample No. 4, the cleaning air is blown by the blower 64 (see FIG. 5) while the first partition plate 108 is kept at this position, and the small piece contact material of the first contact material accumulation layer 102 is caused to flow in free space. Then, the flocs and suspended matter are peeled from the small piece contact material and washed. When the cleaning of the first contact material accumulation layer 102 is completed, the elevating means 116 is activated and the shaft 112
When the first partition plate 108 is lowered through the first contact material integrated layer 102, the first contact material integrated layer 102 is also lowered, and as shown in FIG. It contacts the plate 98. As a result, a free space is formed below the second contact material accumulation layer 104. Here, the cleaning air is blown in by the blower 64, and the small piece contact material of the second contact material accumulation layer 104 is caused to flow in the free space, thereby removing the flocs and suspended substances.
【００２４】第２接触材集積層１０４の洗浄が終了した
時点で、再び、昇降手段１１６を起動し、シャフト１１
４を介して第２仕切り板１１０を下降させると、それに
伴い第２接触材集積層１０４も下降し、図３（ｂ）に示
すように、第２接触材集積層１０４の下部は第１仕切り
板１０８に接する。この結果、第３接触材集積層１０６
の下に自由空間が発生する。ここで、洗浄空気をブロア
６４にて吹き込み、第３接触材集積層１０６の小片接触
材を自由空間内で流動させ、フロックや懸濁物質の剥離
を行う。これら接触材集積層の一連の洗浄を各々１〜１
０分ずつ行った後、排泥管６０から排泥、排水する。When the cleaning of the second contact material accumulation layer 104 is completed, the elevating means 116 is activated again, and the shaft 11
When the second partition plate 110 is lowered via the second contact member 4, the second contact material integrated layer 104 is also lowered accordingly, and as shown in FIG. 3B, the lower part of the second contact material integrated layer 104 is the first partition. Touches plate 108. As a result, the third contact material accumulation layer 106
A free space is created below. Here, the cleaning air is blown in by the blower 64, and the small piece contact material of the third contact material accumulation layer 106 is caused to flow in the free space, thereby removing the flocs and suspended substances. A series of cleaning of these contact material accumulation layers is performed for each of 1 to 1
After performing the process for 0 minutes each time, the sludge is drained and drained from the sludge pipe 60.
【００２５】実施例 本実施例は、本発明に係る上昇流式凝集沈殿装置の実施
例の一つであって、実施形態例２の凝集沈殿槽と同じ構
成で、以下の装置諸元を有する７２０ｍ3 ／日の通水流
量の上昇流式凝集沈殿装置である。 １．凝集剤混和槽 容積、材質 ：１ｍ3 、ポリエチレン製 攪拌機 ：０．４ｋｗ×１４５０rpm 凝集剤 ：ポリ塩化アルミニウム 注入率＝濁度×０．３（mg/l） ２．凝集沈殿槽 寸法 ：直径１，６００mm×高さ５，１００mm 接触材集積層の高さ ：第１接触材集積層７００mm 第２接触材集積層７００mm 第３接触材集積層７００mm 通水速度（空塔速度）：１５ｍ／ｈ 材質 ：本体ＳＵＳ３０４ 小片接触材 第１接触材集積層：直径１０mm×長さ２０mmのポリエチレン製円筒体 第２接触材集積層：直径６mm×長さ１０mmのポリエチレン製円筒体 第３接触材集積層：直径４mm×長さ４mmのポリエチレン製円筒体 第３仕切り板 ：目開き４mmのステンレス網 第４仕切り板 ：目開き２mmのステンレス網 Example 1 This example is one of examples of an upflow type coagulation / sedimentation apparatus according to the present invention, and has the same configuration as the coagulation / sedimentation tank of Embodiment 2 and has the following device specifications. This is an upflow coagulating sedimentation apparatus with a flow rate of 720 m 3 / day. 1. 1. Coagulant mixing tank Volume and material: 1 m 3 , polyethylene stirrer: 0.4 kw × 1450 rpm Coagulant: polyaluminum chloride Injection rate = turbidity × 0.3 (mg / l) Coagulation sedimentation tank Dimensions: 1,600 mm in diameter × 5,100 mm in height Height of contact material accumulation layer: First contact material accumulation layer 700 mm Second contact material accumulation layer 700 mm Third contact material accumulation layer 700 mm Speed): 15 m / h Material: Main body SUS304 Small piece contact material First contact material accumulation layer: Polyethylene cylinder of diameter 10 mm x length 20 mm Second contact material accumulation layer: Polyethylene cylinder of diameter 6 mm x length 10 mm 3 contact material accumulation layer: polyethylene cylinder of 4 mm in diameter x 4 mm in length 3rd partition plate: stainless steel mesh with 4 mm mesh 4th partition plate: stainless steel mesh with 2 mm mesh
【００２６】本実施例の上昇流式凝集沈殿装置を使っ
て、濁度２００度の河川水を原水として通水試験を行っ
たところ、洗浄間隔を１２時間とした各通水工程で、そ
の工程中、濁度１度の処理水を安定して流出させること
ができた。Using the upflow coagulating sedimentation apparatus of the present embodiment, a water flow test was performed using river water having a turbidity of 200 degrees as raw water. Medium, the treated water having a turbidity of 1 degree was able to flow out stably.
【００２７】比較例 実施例と同じ寸法の凝集剤混和槽及び凝集沈殿槽を有
し、凝集沈殿槽内に高さ２１００mmの一層の接触材集積
層を以下の３通りの小片接触材で形成した従来の通水流
量７２０ｍ3 ／日の上昇流式凝集沈殿装置１０を比較例
１〜３とし、実施例と同じ原水を通水して通水試験を行
ったところ、表１の結果を得た。 比較例１ 小片接触材：直径１０mm×長さ２０mmのポリエチレン製
円筒体 比較例２ 小片接触材：直径６mm×長さ１０mmのポリエチレン製円
筒体 比較例３ 小片接触材：直径４mm×長さ４mmのポリエチレン製円筒
体COMPARATIVE EXAMPLE A coagulant mixing tank and a coagulating sedimentation tank having the same dimensions as those of the example were provided, and a single layer of a contact material having a height of 2100 mm was formed in the coagulating sedimentation tank with the following three types of small piece contacting materials. The same upflow coagulation sedimentation apparatus 10 as the conventional flow rate of 720 m 3 / day was set as Comparative Examples 1 to 3, and the same raw water as in the example was used to conduct a water flow test. The results shown in Table 1 were obtained. . Comparative Example 1 Small piece contact material: polyethylene cylinder of diameter 10 mm x length 20 mm Comparative Example 2 Small piece contact material: polyethylene cylinder of diameter 6 mm x length 10 mm Comparative Example 3 Small piece contact material: diameter 4 mm x length 4 mm Polyethylene cylinder
【００２８】 表１ 処理水の濁度（度） 洗浄間隔（時間） 比較例１ １５ １４ ２ ８ ８ ３ １ ４Table 1 Turbidity (degree) of treated water Cleaning interval (hour) Comparative Example 1 15 14 2 8 8 3 14
【００２９】比較例と実施例の通水試験結果の対比から
明らかなように、本実施例の上昇流式凝集沈殿装は、従
来の装置であれば、洗浄間隔を４時間に短縮せざる得な
くなるような、濁度１の処理水を１２時間という長い通
水時間にわたり安定して流出させることができる。逆に
言えば、本実施例の上昇流式凝集沈殿装置は、洗浄間隔
を短くすることなく、比較例１、２の８〜１５度の処理
水濁度から１度の処理水濁度に低下させることができ
る。As is evident from the comparison between the results of the water flow test of the comparative example and that of the example, the upflow coagulating sedimentation apparatus of the present example requires a conventional apparatus to shorten the cleaning interval to 4 hours. The treated water having a turbidity of 1, which can be eliminated, can be stably discharged over a long flowing time of 12 hours. Conversely, the upflow coagulation sedimentation apparatus of the present example reduces the treated water turbidity of 8 to 15 degrees of Comparative Examples 1 and 2 to 1 treated water turbidity without shortening the washing interval. Can be done.
【００３０】[0030]
【発明の効果】本発明によれば、凝集沈殿手段が、複数
層の接触材集積層を原水の流れ方向に直列に備え、かつ
接触材集積層を構成する小片接触材の形状及び寸法の少
なくとも一方が接触材集積層相互間で異なることによ
り、大きな懸濁物捕捉量を維持しつつ、即ち洗浄間隔を
短くすることなく、懸濁物除去率を高くすることができ
る。また、接触材集積層間の仕切り板を可動式にするこ
とによって、接触材集積層を収容する凝集沈殿槽の高さ
を低くすることができる。According to the present invention, the coagulation and sedimentation means comprises a plurality of contact material accumulation layers in series in the flow direction of raw water, and at least the shape and size of the small contact material constituting the contact material accumulation layer. One difference between the contact material accumulation layers makes it possible to increase the suspended solids removal rate while maintaining a large suspended solids capture amount, that is, without shortening the washing interval. In addition, by making the partition plate between the contact material accumulation layers movable, the height of the coagulation sedimentation tank accommodating the contact material accumulation layers can be reduced.
【図１】実施形態例１の上昇流式凝集沈殿装置の要部、
即ち凝集沈殿槽の構成を示す模式図である。FIG. 1 shows a main part of an upflow coagulation / sedimentation apparatus according to Embodiment 1;
That is, it is a schematic diagram showing the configuration of the coagulation sedimentation tank.
【図２】実施形態例２の上昇流式凝集沈殿装置の要部、
即ち凝集沈殿槽の構成を示す模式図である。FIG. 2 shows a main part of an upflow coagulation / sedimentation apparatus according to Embodiment 2;
That is, it is a schematic diagram showing the configuration of the coagulation sedimentation tank.
【図３】図３（ａ）及び（ｂ）は、それぞれ、実施形態
例２の仕切り板の位置を説明する模式図である。FIGS. 3A and 3B are schematic diagrams illustrating the position of a partition plate according to a second embodiment. FIG.
【図４】従来の上昇流式凝集沈殿装置の構成を示すフロ
ーシートである。FIG. 4 is a flow sheet showing a configuration of a conventional upflow coagulation / sedimentation apparatus.
【図５】従来の上昇流式凝集沈殿装置の凝集沈殿槽の構
成を示す模式図である。FIG. 5 is a schematic diagram showing a configuration of a coagulation sedimentation tank of a conventional upflow coagulation sedimentation apparatus.
【図６】小片接触材の一例を示す斜視図である。FIG. 6 is a perspective view showing an example of a small piece contact member.
１０ 従来の上昇流式凝集沈殿装置 １２ 原水槽 １４ 原水ポンプ １６ 凝集剤添加装置 １８ 薬品混和槽 ２０ 凝集沈殿槽 ２２ 濁度計 ２４ 凝集剤槽 ２６ 原水供給管 ２８ 凝集剤ポンプ ２９ 攪拌機 ３０ 流入管 ３２ 流入ゾーン ３４ 接触材集積ゾーン ３６ 集水ゾーン ３８、４０ 仕切り板 ４２ 小片接触材 ４４ 接触材集積層 ４６ 集水部 ４８ 集水トラフ ５０ 流出管 ５２ 処理水槽 ５４ 変流板 ５６ アルカリ剤注入管 ５８ 汚泥貯留ゾーン ６０ 排泥管 ６２ 空気供給管 ６４ 空気ブロアー ７０ 実施形態例１の上昇流式凝集沈殿装置の凝集沈殿
槽 ７２ 流入ゾーン ７４ 第１接触材集積ゾーン ７６ 第２接触材集積ゾーン ７８ 集水ゾーン ８０ 第１流出防止板 ８２ 仕切り板 ８４ 第１接触材集積層 ８６ 第２流出防止板 ８８ 第２接触材集積層 ９０ 実施形態例２の上昇流式凝集沈殿装置の凝集沈殿
槽 ９２ 流入ゾーン ９４ 接触材集積ゾーン ９６ 集水ゾーン ９８ 第１流出防止板 １００ 第２流出防止板 １０２ 第１接触材集積層 １０４ 第２接触材集積層 １０６ 第３接触材集積層 １０８ 第１仕切り板 １１０ 第２仕切り板 １１２、１１４ シャフト １１６ 昇降手段DESCRIPTION OF SYMBOLS 10 Conventional upflow coagulation sedimentation apparatus 12 Raw water tank 14 Raw water pump 16 Coagulant addition apparatus 18 Chemical mixing tank 20 Coagulation sedimentation tank 22 Turbidity meter 24 Coagulant tank 26 Raw water supply pipe 28 Coagulant pump 29 Stirrer 30 Inflow pipe 32 Inflow zone 34 Contact material accumulation zone 36 Water collecting zone 38, 40 Partition plate 42 Small piece contact material 44 Contact material accumulation layer 46 Water collecting part 48 Water collecting trough 50 Outflow pipe 52 Treated water tank 54 Current transformer plate 56 Alkaline agent injection pipe 58 Sludge Storage zone 60 Drainage pipe 62 Air supply pipe 64 Air blower 70 Coagulation sedimentation tank of upflow coagulation sedimentation apparatus of Embodiment 1 72 Inflow zone 74 First contact material accumulation zone 76 Second contact material accumulation zone 78 Water collecting zone Reference Signs List 80 first outflow prevention plate 82 partition plate 84 first contact material accumulation layer 86 second outflow prevention plate 88 second contact material accumulation layer 90 Coagulation settling tank of upflow coagulation sedimentation apparatus of Embodiment 2 92 Inflow zone 94 Contact material accumulation zone 96 Water collecting zone 98 First outflow prevention plate 100 Second outflow prevention plate 102 First contact material accumulation layer 104 Second Contact material accumulation layer 106 Third contact material accumulation layer 108 First partition plate 110 Second partition plate 112, 114 Shaft 116 Elevating means
Claims (3)
加手段の下流に設けられ、空隙率の大きな小片接触材を
集積させてなる接触材集積層を有し、接触材集積層内を
上向流で原水を流して、原水中の懸濁物を凝集、沈殿さ
せる凝集沈殿手段とからなる上昇流式凝集沈殿装置にお
いて、 凝集沈殿手段が、複数層の接触材集積層を原水の流れ方
向に直列に備え、かつ接触材集積層を構成する小片接触
材の形状及び寸法の少なくとも一方が接触材集積層相互
間で異なることを特徴とする上昇流式凝集沈殿装置。1. An additive means for adding a flocculant to raw water, and a contact material accumulation layer provided downstream of the addition means and comprising a small piece contact material having a large porosity. In an upward flow type coagulation and sedimentation device comprising a coagulation and sedimentation means for flowing raw water in an upward flow and coagulating and precipitating a suspension in the raw water, the coagulation and sedimentation means flows the raw water through a plurality of contact material accumulation layers. An upflow coagulation sedimentation apparatus, wherein at least one of the shape and the size of the small piece contact material constituting the contact material accumulation layer is different between the contact material accumulation layers.
接触材集積層を構成する小片接触材は、それより上流に
位置する接触材集積層を構成する小片接触材と同じ形状
であって、かつ寸法が小さいことを特徴とする請求項１
に記載の上昇流式凝集沈殿装置。2. The small piece contact material constituting the contact material accumulation layer located downstream in the flow direction of the raw water has the same shape as the small piece contact material constituting the contact material accumulation layer located upstream therefrom. And a small size.
4. The upflow coagulation sedimentation apparatus according to 1.
下に多層で設けてあって、接触材集積層の間には、それ
ぞれの接触材集積層を構成する小片接触材が相互に混じ
り合わない目開きの多孔状仕切り板が設けてあり、かつ
仕切り板が、縦型容器内で上下に昇降自在であることを
特徴とする請求項１又は２に記載の上昇流式凝集沈殿装
置。3. A plurality of contact material accumulation layers are provided vertically in a vertical container in a multi-layer structure, and between the contact material accumulation layers, the small piece contact materials constituting each contact material accumulation layer are mutually connected. The upflow coagulating sediment according to claim 1 or 2, wherein a porous partition plate having openings that does not mix with the water is provided, and the partition plate is vertically movable in a vertical container. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9338395A JPH11169608A (en) | 1997-12-09 | 1997-12-09 | Ascending current type flocculating and settling apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9338395A JPH11169608A (en) | 1997-12-09 | 1997-12-09 | Ascending current type flocculating and settling apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11169608A true JPH11169608A (en) | 1999-06-29 |
Family
ID=18317764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9338395A Pending JPH11169608A (en) | 1997-12-09 | 1997-12-09 | Ascending current type flocculating and settling apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11169608A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013212443A (en) * | 2012-03-30 | 2013-10-17 | Metawater Co Ltd | Solid/liquid separator and method of cleaning solid/liquid separator |
| CN110723798A (en) * | 2019-11-12 | 2020-01-24 | 中国农业科学院农业环境与可持续发展研究所 | High-concentration livestock and poultry breeding sewage flocculation treatment device and use method thereof |
-
1997
- 1997-12-09 JP JP9338395A patent/JPH11169608A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013212443A (en) * | 2012-03-30 | 2013-10-17 | Metawater Co Ltd | Solid/liquid separator and method of cleaning solid/liquid separator |
| CN110723798A (en) * | 2019-11-12 | 2020-01-24 | 中国农业科学院农业环境与可持续发展研究所 | High-concentration livestock and poultry breeding sewage flocculation treatment device and use method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2680057C (en) | Coagulation sedimentation process | |
| JP3836250B2 (en) | Coagulation sedimentation equipment | |
| JP3640285B2 (en) | Coagulation sedimentation equipment | |
| US3481868A (en) | Water clarifier and water clarification method | |
| JP3856307B2 (en) | Coagulation sedimentation method and apparatus | |
| JPH11244870A (en) | Flocculating and settling device for sewage and cleaning method thereof | |
| KR970074672A (en) | Filtration-integrated sedimentation tank and its backwashing method | |
| JP2002239306A (en) | Floc forming device, solid-liquid separation apparatus and wastewater treatment method | |
| JP2003080007A (en) | Method and apparatus for flocculation and settling | |
| JPH11169608A (en) | Ascending current type flocculating and settling apparatus | |
| JP2000325710A (en) | Solid-liquid separation apparatus | |
| JP3895064B2 (en) | Aggregation floc storage and collection device, aggregation filtration device, and aggregation floc capture and recovery method | |
| JPH06304411A (en) | Cohesive sedimentation and treatment apparatus therefor | |
| JPH11244868A (en) | Coagulating sedimentation apparatus for sewage | |
| JP3866406B2 (en) | Coagulation sedimentation apparatus and operation method thereof | |
| JP4455735B2 (en) | Coagulation sedimentation equipment | |
| JP2003265905A (en) | Flocculating and settling apparatus | |
| JP4422865B2 (en) | Coagulation sedimentation equipment | |
| JP3506724B2 (en) | Thickener with built-in filter | |
| KR200454816Y1 (en) | Filtration apparatus for overflow of sewer | |
| JP2766881B2 (en) | Water treatment equipment | |
| CN112661340A (en) | Sewage treatment system based on flushing type sludge separation | |
| JPH10202010A (en) | Water treatment device | |
| JP3872918B2 (en) | Coagulation sedimentation apparatus and operation method thereof | |
| CN218951115U (en) | Sedimentation tank for sewage treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20040823 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20040831 |
|
| A02 | Decision of refusal |
Effective date: 20050111 Free format text: JAPANESE INTERMEDIATE CODE: A02 |