JPH0520126B2 - - Google Patents
Info
- Publication number
- JPH0520126B2 JPH0520126B2 JP59050526A JP5052684A JPH0520126B2 JP H0520126 B2 JPH0520126 B2 JP H0520126B2 JP 59050526 A JP59050526 A JP 59050526A JP 5052684 A JP5052684 A JP 5052684A JP H0520126 B2 JPH0520126 B2 JP H0520126B2
- Authority
- JP
- Japan
- Prior art keywords
- treated water
- filtration device
- treated
- wastewater filtration
- floating filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 72
- 238000004075 wastewater filtration Methods 0.000 claims description 24
- 238000005406 washing Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 description 15
- 238000004062 sedimentation Methods 0.000 description 12
- 239000002245 particle Substances 0.000 description 8
- 239000007787 solid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Filtering Materials (AREA)
- Filtration Of Liquid (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、廃水濾過装置に係り、特に浮上濾材
を使用した廃水濾過装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wastewater filtration device, and particularly to a wastewater filtration device using a floating filter medium.
廃水中の濁質成分を除去する装置としては、一
般に濁質濃度が高い場合には沈降分離装置が用い
られ、濁質濃度が低い場合には粒状濾材層を有し
た濾過装置が用いられている。
As a device for removing suspended matter from wastewater, a sedimentation separator is generally used when the concentration of suspended matter is high, and a filtration device with a granular filter layer is used when the concentration of suspended matter is low. .
沈降分離装置は濁質粒子の沈降速度（Ut）と
すると、その沈降面積（Ａ）は次式で決定され
る。 Assuming that the sedimentation separator has a sedimentation velocity ( Ut ) of suspended particles, its sedimentation area (A) is determined by the following equation.
Ａ＝Ｑ／Ut
ただし、Ｑ：処理水量
しかしながら、濁質の沈降速度は大から小へと
分布しており、沈降分離効率を上げるためには、
沈降速度の小さな値で設計されるため、大きな沈
降速度の濁質粒子に対しては過剰設備となつてし
まい、敷地面積が大きいことが短所となつてい
る。 A=Q/U tHowever , Q: Amount of water to be treated However, the settling speed of suspended solids is distributed from high to low, and in order to increase the sedimentation separation efficiency,
Because it is designed with a small sedimentation rate, it becomes over-equipped for suspended particles with a high sedimentation rate, and its disadvantage is that it requires a large site area.
一方、濾過装置は前述したように、濁質濃度が
低い場合に用いられ、一般にその上限値は、50
mg／である。この理由としては濾材層における
濁質成分は、主として、濁質粒子と濾材間又は濁
質相互間におけるふるい分け作用により捕捉され
ると考えられ、これらは、全て、濾材層内の空隙
部で行われることから、濾過装置の濁質捕捉量は
濾材層の空隙率に大きく影響しているからであ
る。濁質捕捉量の限界値に達するまでの時間を濾
過継続時間（θ）として、濾材の空隙率に着目し
て試算してみると、
θ＝ηε・ε・γ・Ｈ／（Ci−Cp）・Ｕ ……(2)
ここで、
ηε：空隙利用率（−）
ε：空隙率（−）
γ：捕捉された濁質成分のみかけ密度（ｇ／m3）
Ｈ：層高（ｍ）
Ci，Cp：被処理水及び処理水の濁質濃度（mg／
）
U8：濾過速度（ｍ／ｈ）
となる。いま、従来の粒状濾材として、砂又はア
ンスラサイトを用いた場合、その空隙率は0.5（50
％）であり、又ηε＝0.5、Ci＝500mg／、γ＝２
×104ｇ／m3、Ｈ＝2m、Cp＝50mg／、Ｕ＝
8m／ｈとして(2)式に代入し、計算すると、濾過
継続時間は約３時間と短く実用的でないという問
題がある。 On the other hand, as mentioned above, filtration devices are used when the concentration of suspended solids is low, and the upper limit is generally 50
mg/. The reason for this is thought to be that the suspended matter components in the filter media layer are mainly captured by the sieving action between the suspended particles and the filter media or between each suspended matter, and these are all carried out in the voids within the filter media layer. This is because the amount of suspended solids captured by the filtration device greatly influences the porosity of the filter medium layer. Taking the time required to reach the limit value of the amount of suspended solids trapped as the filtration duration time (θ), and calculating by focusing on the porosity of the filter medium, θ=ηε・ε・γ・H/(C i −C p )・U ...(2) Here, ηε: Vacancy utilization rate (-) ε: Porosity (-) γ: Apparent density of captured suspended solids (g/m 3 ) H: Bed height (m ) C i , C p : Turbidity concentration of treated water and treated water (mg/
) U 8 : Filtration speed (m/h). Currently, when sand or anthracite is used as a conventional granular filter medium, its porosity is 0.5 (50
%), and ηε=0.5, C i =500mg/, γ=2
×10 4 g/m 3 , H = 2 m, C p = 50 mg/, U =
When calculated by substituting 8 m/h into equation (2), the filtration duration is as short as about 3 hours, which is impractical.
粒状濾材として、比重の軽いポリプロピレン、
ポリエチレン、ポリスチレンの単体ビーズや発泡
体粒子又はシラスバルーンなどが知られている
が、これらの空隙率はほぼ0.6（60％）以下であ
る。ここで発泡体やシラスバルーンの粒子内空間
は空気が満たされているため、実質的に濾過に使
われる空隙率としては前述のような値になる。な
お、粒状体濾材層は濁質成分が上流側から堆積
し、これに比例して流路抵抗が増大するので、層
高を大きくすることには限界がある。このため、
(2)式の層高Ｈを限界値を越えて大にして、濾過継
続時間θを大きくすることはできない。 As granular filter media, polypropylene with light specific gravity,
Polyethylene, polystyrene single beads, foam particles, and glass balloons are known, but the porosity of these is approximately 0.6 (60%) or less. Here, since the spaces within the particles of the foam or Shirasu balloon are filled with air, the porosity used for filtration will essentially be the value described above. Note that in the granular filter medium layer, suspended matter components are deposited from the upstream side, and the flow path resistance increases in proportion to this, so there is a limit to increasing the layer height. For this reason,
It is not possible to increase the filtration duration θ by increasing the layer height H in equation (2) beyond the limit value.
本発明は、このような事情に鑑みてなされたも
ので、前記従来技術の欠点を解消し、被処理水を
大量に処理でき、長時間の使用に耐え、濁質成分
を有効に捕捉できる廃水濾過装置を提供すること
を目的とする。
The present invention has been made in view of these circumstances, and provides wastewater that eliminates the drawbacks of the prior art, can treat a large amount of water to be treated, can withstand long-term use, and can effectively capture turbid components. The purpose is to provide a filtration device.
本発明は、前記目的を達成するために、廃水濾
過装置本体と、廃水濾過装置本体内に設けられ、
複数の濾材からなる浮上濾材層と、廃水濾過装置
本体に設けられ、浮上濾材層の下方に開口し、被
処理水供給管が接続される被処理水供給口と、廃
水濾過装置本体の下部に開口し、洗浄水排出管等
が接続される洗浄水排出口と、廃水濾過装置本体
の上部に設けられ、浮上濾材層の上部に夫々開口
し処理水排出管等が接続される処理水排出口及び
洗浄水供給管が接続される洗浄水供給口と、から
成り、前記被処理水供給口から供給された被処理
水を浮上濾材層を通過させて濾過し、濾過後の被
処理水を処理水排出口から排出する廃水濾過装置
に於いて、前記浮上濾材層の濾材は網目状円筒体
から構成されると共に、該網目状円筒体の両端は
開放端で構成されることを特徴とする。
In order to achieve the above object, the present invention includes a wastewater filtration device main body, and a wastewater filtration device provided within the main body,
A floating filter layer consisting of a plurality of filter media, a water supply port to be treated which is provided in the wastewater filtration device main body, opens below the floating filter material layer, and is connected to a water supply pipe to be treated, and a water supply port provided at the bottom of the wastewater filtration device main body. A wash water outlet that opens and connects to a wash water discharge pipe, etc.; and a treated water outlet that opens at the top of the wastewater filtration device body and opens above the floating filter layer and connects a treated water discharge pipe, etc. and a wash water supply port to which a wash water supply pipe is connected, the water to be treated supplied from the water supply port to be treated is filtered by passing through a floating filter layer, and the water to be treated after filtration is treated. In the wastewater filtration device that discharges water from a water outlet, the filter medium of the floating filter layer is composed of a mesh-like cylindrical body, and both ends of the mesh-like cylinder are formed with open ends.
第１図に本実施例を示す。 FIG. 1 shows this embodiment.
廃水濾過装置１の内部には金網２が設けられ、
金網２の下方に第２図に示す濾材から成る浮上濾
材層３が形成されている。廃水濾過装置１の上部
には、処理水排出管４等が接続される処理水排出
口と洗浄水供給管５が接続される洗浄水供給口と
が設けられ、廃水濾過装置１の下部には洗浄水排
出管６等が接続される洗浄水排出口が設けられて
いる。更に、浮上濾材層３の下方で廃水濾過装置
の中部には被処理水供給管７が接続される被処理
水供給口が設けられている。上記処理水排出管等
及び洗浄水排出管等としては、夫々排出管の他排
出樋であつてもよい。 A wire mesh 2 is provided inside the wastewater filtration device 1,
A floating filter medium layer 3 made of a filter medium shown in FIG. 2 is formed below the wire mesh 2. The upper part of the waste water filtration apparatus 1 is provided with a treated water outlet to which the treated water discharge pipe 4 and the like are connected, and the wash water supply port to which the wash water supply pipe 5 is connected. A wash water discharge port is provided to which a wash water discharge pipe 6 and the like are connected. Further, below the floating filter layer 3 and in the middle of the wastewater filtration device, a treated water supply port to which a treated water supply pipe 7 is connected is provided. The treated water discharge pipe, wash water discharge pipe, etc. may be a discharge gutter other than a discharge pipe, respectively.
また、本実施例で用いる浮上濾材層３の濾材は
第２図に示すように、網目状円筒体に形成され、
両端は開放されている。この濾材の比重は0.9、
充填時の空隙率95％である。 Further, as shown in FIG. 2, the filter medium of the floating filter layer 3 used in this example is formed into a mesh-like cylindrical body,
Both ends are open. The specific gravity of this filter medium is 0.9,
The porosity when filled is 95%.
次に本発明の作用を説明する。まず、処理工程
では、濁質成分を含む被処理水が被処理水供給管
７を介して廃水濾過装置１に供給され、沈降速度
の大きな濁質粒子を沈降ゾーンで沈降除去する。
除去された被処理水は上向流として浮上濾材層３
を通過して被処理水中の残りの濁質成分を濾材に
付着して濁質を除去する。即ち、網目状円筒体の
両端を開放端に形成したので、円筒体の開放端を
通り抜ける処理水の流速と、網目を通り抜ける処
理水の流速との間で速度差が生じ、うず流が生じ
る。このうず流によつて処理水の局部滞留域が生
じ、処理水中の濁質成分が凝集し易くなり、滞留
域が生じた下流側の網目状円筒体で捕捉され易く
なる。局部滞留域は濾材層の全域にわたつて生じ
るために濁質成分の捕捉率が高くなり、濾過継続
時間を長くすることができる。また、網目状円筒
体の両端を開放端にしたので、従来の粒状濾材と
比較して濾過継続時間が長くなり、大量に被処理
水を処理できる。 Next, the operation of the present invention will be explained. First, in the treatment process, water to be treated containing turbidity components is supplied to the wastewater filtration device 1 via the water supply pipe 7, and turbidity particles having a high sedimentation rate are sedimented and removed in a settling zone.
The removed water to be treated flows upward to the floating filter layer 3.
The remaining suspended matter in the water to be treated is attached to the filter medium, and the suspended matter is removed. That is, since both ends of the mesh cylinder are formed as open ends, a velocity difference occurs between the flow rate of the treated water passing through the open end of the cylinder and the flow rate of the treated water passing through the mesh, resulting in an eddy flow. This eddy flow creates a local stagnation area of the treated water, making it easier for suspended components in the treated water to coagulate and to be captured by the mesh cylinder on the downstream side where the stagnation area is created. Since the local retention area is generated over the entire area of the filter medium layer, the capture rate of suspended matter components is increased, and the filtration duration can be extended. Furthermore, since both ends of the mesh cylinder are open ends, the filtration duration is longer than in conventional granular filter media, and a large amount of water can be treated.
濁質成分が除去された被処理水は排出管４を経
て廃水濾過装置１の外へ排出される。この処理工
程は一般に処理水の濁質濃度が許容値を越えた時
点で終了し、終了後洗浄工程に入る。 The treated water from which the turbid components have been removed is discharged to the outside of the wastewater filtration device 1 through the discharge pipe 4. This treatment process generally ends when the turbidity concentration of the treated water exceeds a permissible value, and then a cleaning process begins.
洗浄工程は、洗浄水を洗浄水供給管５から廃水
濾過装置１内に供給して下向流を生じさせ、浮上
濾材を振動及び攪拌させながら下降せしめて、浮
上濾材に捕捉された濁質成分を濾材から剥離す
る。剥離された濁質成分は洗浄水の下向流と共に
沈降ゾーンに入り、沈降している濁質粒子と一緒
に洗浄水排出管６より装置外へ排出する。 In the washing process, washing water is supplied from the washing water supply pipe 5 into the wastewater filtration device 1 to generate a downward flow, and the floating filter material is lowered while being vibrated and agitated to remove the suspended matter components captured by the floating filter material. peel off from the filter medium. The separated turbid components enter the settling zone with the downward flow of the wash water, and are discharged from the apparatus through the wash water discharge pipe 6 together with the settled turbid particles.
また、濾材は浮上性があるので下向流で効果的
に振動及び攪拌される。さらに、沈降ゾーンに沈
積した濁質成分は、濾材の洗浄水により排出され
るので、新たな洗浄水が不必要となる。 Furthermore, since the filter medium has floating properties, it is effectively vibrated and stirred by the downward flow. Furthermore, since the suspended matter components deposited in the settling zone are discharged by the washing water of the filter medium, new washing water becomes unnecessary.
更に、洗浄水の通水方向が濁質成分の沈降方向
と同一方向の下向流であり、従来の上向流による
洗浄に比べ洗浄水の使用量が少ない。 Furthermore, the water flow direction is a downward flow in the same direction as the sedimentation direction of the turbidity components, and the amount of washing water used is smaller than in the conventional upward flow washing.
尚、沈降ゾーンで一次的に、沈降速度の大きな
濁質粒子を除去するので、濾過継続時間をさらに
増加させることができる。 Incidentally, since suspended particles having a high sedimentation rate are primarily removed in the sedimentation zone, the filtration duration can be further increased.
本実施例では、被処理水の濁質濃度500mg／、
上向流速度10m／ｈの条件で処理水濁質濃度は20
mg／以下となり、又、濾過継続時間は約10時間
で従来の濾材層に比べ、約３倍にすることができ
た。又、廃水濾過装置の敷地面積は、従来の沈降
分離装置に比べ、1/10以下に減少させるこができ
た。 In this example, the turbidity concentration of the water to be treated is 500mg/,
The treated water turbidity concentration is 20 at an upward flow rate of 10 m/h.
mg/ or less, and the filtration duration was about 10 hours, which was about three times that of a conventional filter medium layer. In addition, the site area of the wastewater filtration equipment can be reduced to less than 1/10 of that of conventional sedimentation separation equipment.
本発明によれば濾材の網目状円筒体の両端を開
放端に形成したので、被処理水を大量に処理で
き、また長時間の使用に耐えることが出来る。本
発明では、円筒体の開放端を通り抜ける処理水の
流速と、網目を通り抜ける処理水の流速との間で
速度差が生じ、局部的うず流が全濾過層にわたつ
て生じる。このうず流によつて処理水の滞留域が
生じ、処理水中の濁質成分が凝集し易くなり、滞
留域が生じた下流側の網目状円筒体で捕捉され易
くなり、濁質成分の捕捉率が高くなる。
According to the present invention, since both ends of the mesh-like cylindrical body of the filter medium are formed as open ends, a large amount of water to be treated can be treated and the filter can be used for a long time. In the present invention, a velocity difference is created between the flow rate of the treated water through the open end of the cylinder and the flow rate of the treated water through the mesh, resulting in localized eddy flow across the entire filtration layer. This eddy flow creates a stagnation area in the treated water, which makes it easier for the turbid components in the treated water to coagulate and to be easily captured by the mesh cylinder on the downstream side where the stagnation area occurs, resulting in a higher capture rate of turbid components. becomes higher.
第１図は本発明に係る廃水濾過装置の一実施例
を示す説明図、第２図は浮上濾材の実施例を示す
説明図である。
１……廃水濾過装置、２……金網、３……浮上
濾材層、４……処理水排出管、５……洗浄水供給
管、６……洗浄水排出管、７……被処理水供給
管。
FIG. 1 is an explanatory diagram showing an embodiment of a wastewater filtration device according to the present invention, and FIG. 2 is an explanatory diagram showing an embodiment of a floating filter medium. 1... Waste water filtration device, 2... Wire mesh, 3... Floating filter layer, 4... Treated water discharge pipe, 5... Washing water supply pipe, 6... Washing water discharge pipe, 7... Treated water supply tube.
Claims (1)
ら成る浮上濾材層と、 廃水濾過装置本体に設けられ、浮上濾材層の下
方に開口し、被処理水供給管が接続される被処理
水供給口と、 廃水濾過装置本体の下部に開口し、洗浄水排出
管等が接続される洗浄水排出口と、 廃水濾過装置本体の上部に設けられ、浮上濾材
層の上部に夫々開口し、処理水排出管等が接続さ
れる処理水排出口及び洗浄水供給管が接続される
洗浄水供給口と、から成り、 前記被処理水供給口から供給された被処理水を
浮上濾材層を通過させて濾過し、濾過後の被処理
水を処理水排出口から排出する廃水濾過装置に於
いて、 前記浮上濾材層の濾材は網目状円筒体から構成
されると共に、該網目状円筒体の両端は開放端で
構成されることを特徴とする廃水濾過装置。[Scope of Claims] 1. A wastewater filtration device main body, a floating filter layer provided in the wastewater filtration device main body and consisting of a plurality of filter media, and a floating filter layer provided in the wastewater filtration device main body, opening below the floating filter material layer, and covering the floating filter material layer. A treated water supply port to which a treated water supply pipe is connected; a washing water outlet that opens at the bottom of the wastewater filtration device body and to which a washing water discharge pipe etc. is connected; and a washing water outlet provided at the top of the wastewater filtration device body. It consists of a treated water outlet that opens at the top of the floating filter layer and is connected to a treated water discharge pipe, etc., and a wash water supply port to which a wash water supply pipe is connected, and the treated water is supplied from the treated water supply port. In a wastewater filtration device that filters treated water through a floating filter layer and discharges the filtered treated water from a treated water outlet, the filter medium of the floating filter layer is composed of a mesh-like cylindrical body. A wastewater filtration device characterized in that both ends of the mesh-like cylindrical body are open ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59050526A JPS60193508A (en) | 1984-03-16 | 1984-03-16 | Solid-liquid separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59050526A JPS60193508A (en) | 1984-03-16 | 1984-03-16 | Solid-liquid separator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60193508A JPS60193508A (en) | 1985-10-02 |
| JPH0520126B2 true JPH0520126B2 (en) | 1993-03-18 |
Family
ID=12861428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59050526A Granted JPS60193508A (en) | 1984-03-16 | 1984-03-16 | Solid-liquid separator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60193508A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5558763A (en) * | 1993-06-24 | 1996-09-24 | Hitachi Plant Engineering & Construction Co., Ltd. | Sewage treatment system with air jetting means |
| JP2001321611A (en) * | 2000-05-18 | 2001-11-20 | Ishigaki Co Ltd | Filter device |
| JP5754649B2 (en) * | 2012-03-29 | 2015-07-29 | 株式会社石垣 | Depth filtration equipment |
| JP5742032B2 (en) * | 2012-03-16 | 2015-07-01 | 株式会社石垣 | Filtration device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4721498U (en) * | 1971-02-19 | 1972-11-10 | ||
| JPS5185257A (en) * | 1975-01-22 | 1976-07-26 | Hitachi Ltd | Koekibunrihoho oyobi sonosochi |
| JPS5340456U (en) * | 1976-09-13 | 1978-04-07 |
-
1984
- 1984-03-16 JP JP59050526A patent/JPS60193508A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4721498U (en) * | 1971-02-19 | 1972-11-10 | ||
| JPS5185257A (en) * | 1975-01-22 | 1976-07-26 | Hitachi Ltd | Koekibunrihoho oyobi sonosochi |
| JPS5340456U (en) * | 1976-09-13 | 1978-04-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60193508A (en) | 1985-10-02 |
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