JP2010284613A - Solid-liquid separator for sludge concentration and method for sludge concentration - Google Patents

Solid-liquid separator for sludge concentration and method for sludge concentration Download PDF

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JP2010284613A
JP2010284613A JP2009142002A JP2009142002A JP2010284613A JP 2010284613 A JP2010284613 A JP 2010284613A JP 2009142002 A JP2009142002 A JP 2009142002A JP 2009142002 A JP2009142002 A JP 2009142002A JP 2010284613 A JP2010284613 A JP 2010284613A
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sludge
screen
solid
tank
concentration
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Hiroshi Matsumura
博志 松村
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Fujiyoshi Kogyo Kk
藤吉工業株式会社
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<P>PROBLEM TO BE SOLVED: To provide a simple solid-liquid separator for sludge concentration which effectively carries out solid-liquid separation treatment for sludge generated by an active-sludge treatment method, increases a MLSS concentration of sludge to concentrate sludge, and decreases residual sludge generated, and to provide a concentration method of sludge using the same separator. <P>SOLUTION: The solid-liquid separator is arranged with a sludge tank and a filtration water tank which are adjacent through a screen, wherein the screen, which is a wedge wire, is arranged while holding a slit horizontally and also the screen surface inclined to a sludge tank side by 3-7° for the vertical direction, a screen diffusion pipe is arranged at the lower part of the screen surface in the sludge tank side, and bubbles discharged from the diffusion pipe rise along the screen surface. Solid liquid separation is carried out by holding the water level of the sludge tank highly than the water level of the filtration water tank. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は汚泥の濃縮装置および汚泥濃縮方法に関し、特に活性汚泥法の処理施設における余剰汚泥などを濃縮するための固液分離装置および方法に関するものである。   The present invention relates to a sludge concentration apparatus and a sludge concentration method, and more particularly to a solid-liquid separation apparatus and method for concentrating excess sludge and the like in a treatment facility of an activated sludge method.
活性汚泥法は、生活雑排水から工場排水に到るまでの有機性排水の有効な排水処理法であるが、処理に伴い多量の余剰汚泥が発生し、この余剰汚泥の発生量が大きな問題である。この余剰汚泥は多量の汚泥浮遊物質(MLSS)を含有し、この余剰汚泥は廃棄物として処理施設より排出され処分される。この余剰汚泥の排出量をいかに減少させることができるかが有機性排水の処理コスト大きく影響する。   The activated sludge method is an effective wastewater treatment method for organic wastewater from household wastewater to industrial wastewater, but a large amount of surplus sludge is generated during the treatment, and the amount of surplus sludge generated is a major problem. is there. This excess sludge contains a large amount of sludge suspended solids (MLSS), and this excess sludge is discharged from the treatment facility as waste and disposed. How the amount of excess sludge discharged can be reduced greatly affects the cost of organic wastewater treatment.
通常の活性汚泥法による有機性排水処理に際しては、曝気処理槽内ないしは別途の沈殿槽内にて汚泥を沈降させて汚泥濃縮を行い、残留ないしは処理槽に返送する汚泥以外の汚泥は、余剰汚泥として排出される。ここで発生する余剰汚泥のMLSSは通常10,000mg/L程度であるが、この濃度をさらに上げて汚泥を濃縮すれば、排出する余剰汚泥の量を減らすことができ、処理コストも下げることができる。しかし、余剰汚泥をさらに脱水処理し、汚泥濃縮を行なう装置は大掛かりなものが必要であった。   In organic wastewater treatment by the normal activated sludge method, sludge is concentrated in an aeration tank or a separate settling tank to concentrate sludge, and sludge other than sludge remaining or returned to the treatment tank is excess sludge. As discharged. The MLSS of surplus sludge generated here is usually about 10,000 mg / L, but if this concentration is further increased and the sludge is concentrated, the amount of surplus sludge to be discharged can be reduced and the processing cost can be reduced. it can. However, a large-scale apparatus is required for further dewatering the excess sludge and concentrating the sludge.
汚泥を濃縮するための固液分離方法としては、通常、沈降法が用いられるが大きな沈降槽と長い時間が必要となる。また、重力によらず遠心分離を利用するのでは大掛かりな装置が必要である。ガラス繊維製などのフィルターを使用したろ過による固液分離も行われるが、固形物が汚泥であるため、大きなろ過面積が必要であり、さらには、フィルター上に固形物が堆積しやすく、加圧ろ過装置が必要となったり、堆積する固形物を除去する装置が必要となったりするために、この場合も装置が大掛かりなものとなる。   As a solid-liquid separation method for concentrating sludge, a sedimentation method is usually used, but a large sedimentation tank and a long time are required. In addition, a large-scale device is required to use centrifugation regardless of gravity. Solid-liquid separation by filtration using a filter made of glass fiber or the like is also performed, but since the solid matter is sludge, a large filtration area is required, and furthermore, the solid matter tends to accumulate on the filter, and pressure is applied. In this case as well, a large-scale apparatus is required because a filtration apparatus is required or an apparatus for removing the accumulated solid matter is required.
各種排水処理において汚水処理の前処理として、粗目のスクリーンを使用して排水中の固形異物を分離することが行われている。排水中の固形物には種々のものがあり、固形物除去用のスクリーンに絡みついたり、スクリーンの目をふさいだりすることが多かった。そのため、前処理としての固形物分離処理に当たっては、スクリーンを水中に設置し、水の流れに対してスクリーンをやや斜めに設置して、スクリーンの下部よりスクリーン面に沿ってエアーを吹き付けることにより、固形物がスクリーンに付着することを防ぐことが行われていた(特許文献1〜5を参照)。この前処理に使用されるスクリーンの網目は比較的粗く、微細目スクリーンが用いられる場合でも目の径は0.5〜2mmのものが使われている(特許文献3もしくは4を参照)。一方、ろ過水側には固形物をほとんど含まないようにするために、ステンレス板等に5〜10mmの小孔を多数設けた微細目スクリーンと、15〜20μm程度の微細孔を備えた合成樹脂の微細目樹脂膜とを積層させたスクリーンを微細目スクリーンと微細目樹脂膜とを積層させたフィルターを使用した装置も提案されている(特許文献5を参照)。   In various wastewater treatments, as a pretreatment for sewage treatment, solid foreign matters in the wastewater are separated using a coarse screen. There are various kinds of solids in the waste water, and they often get entangled with the screen for removing the solids or block the eyes of the screen. Therefore, in the solid separation process as a pretreatment, the screen is installed in water, the screen is installed slightly obliquely with respect to the flow of water, and air is blown along the screen surface from the lower part of the screen, It has been performed to prevent the solid matter from adhering to the screen (see Patent Documents 1 to 5). The mesh of the screen used for this pretreatment is relatively coarse, and even when a fine screen is used, a mesh having a diameter of 0.5 to 2 mm is used (see Patent Document 3 or 4). On the other hand, a synthetic resin provided with a fine screen provided with a large number of small holes of 5 to 10 mm on a stainless steel plate or the like and a fine hole of about 15 to 20 μm in order to contain almost no solid matter on the filtered water side. There has also been proposed an apparatus using a screen in which a fine resin film is laminated and a filter in which a fine screen and a fine resin film are laminated (see Patent Document 5).
これらの固液分離装置は、いずれも汚水処理の前処理として設置されるものであり、活性汚泥処理方法において生ずる高濃度MLSSの汚泥の固液分離に用いるものではない。このような汚泥の固液分離において、細かい粒子として浮遊している汚泥中の固形分を分離可能な細かい目のスクリーンを用い、スクリーンの目詰まりを防ぎつつ、効率よく固液分離を行い、MLSS濃度を高め汚泥を濃縮するものはこれまでにはなかった。   These solid-liquid separators are all installed as a pretreatment for sewage treatment, and are not used for solid-liquid separation of high-concentration MLSS sludge generated in the activated sludge treatment method. In such solid-liquid separation of sludge, a fine-mesh screen that can separate solids in sludge floating as fine particles is used, and solid-liquid separation is efficiently performed while preventing clogging of the screen. There has never been anything that increases the concentration and concentrates sludge.
実開昭58−10805号公報Japanese Utility Model Publication No. 58-10805 実開昭58−119809号公報Japanese Utility Model Publication No.58-119809 特開昭62−110717号公報Japanese Patent Laid-Open No. 62-110717 特開平08−299718号公報Japanese Patent Application Laid-Open No. 08-299718 国際公開第02/060554号パンフレットInternational Publication No. 02/060554 Pamphlet
本発明の課題は、活性汚泥処理法により生ずる汚泥に対して、効率よく固液分離処理を施し、汚泥のMLSS濃度を高め汚泥を濃縮し、発生する余剰汚泥を減少させることのできる簡易な汚泥濃縮用固液分離装置およびこの装置を用いた汚泥の濃縮方法を提供することにある。   An object of the present invention is to easily perform solid-liquid separation treatment on sludge generated by the activated sludge treatment method, increase the MLSS concentration of the sludge, concentrate the sludge, and reduce the excess sludge generated. An object of the present invention is to provide a solid-liquid separation device for concentration and a method for concentrating sludge using this device.
本発明の固液分離装置は、スクリーンを介して隣接する汚泥槽とろ過水槽とが設置され、該スクリーンはウェッジワイヤであって、スリットを水平にし、かつスクリーン面を垂直方向に対し3°〜7°汚泥槽側に傾斜させて設置され、汚泥槽側のスクリーン面下部にはスクリーン散気配管が設置され、散気配管より放出された気泡が該スクリーン面に沿って上昇できることを特徴とする固液分離装置である。   The solid-liquid separation device of the present invention is provided with a sludge tank and a filtration water tank adjacent to each other via a screen, the screen is a wedge wire, the slit is horizontal, and the screen surface is 3 ° to the vertical direction. It is installed at an angle to the 7 ° sludge tank side, a screen aeration pipe is installed below the screen surface on the sludge tank side, and bubbles released from the aeration pipe can rise along the screen surface. It is a solid-liquid separator.
ウェッジワイヤはウェッジスクリーンとも称され、ステンレス等の断面三角形状のバーを配置しスリットを形成したもので、汚水処理の前処理に使用されるウェッジワイヤのスリット幅は数mm以上のものが用いられるが、本発明に用いるウェッジワイヤはスリット幅が30〜100μmである微細スリットのものが用いられる。そして本発明では、このスリットが水平方向になるように設置される。   The wedge wire is also referred to as a wedge screen, and is formed by arranging a bar having a triangular cross section such as stainless steel to form a slit. The wedge wire used for pretreatment of sewage treatment has a slit width of several mm or more. However, the wedge wire used in the present invention is a fine slit having a slit width of 30 to 100 μm. And in this invention, it installs so that this slit may become a horizontal direction.
また、上記の固液分離装置を用いて汚泥の固液分離を行うに際しては、汚泥槽の水位をろ過水槽の水位より高く保って固液分離操作を行い、汚泥の濃縮を行うことを特徴とする。このときの水位の差は3〜10cm程度としておくことが好ましい。   In addition, when performing solid-liquid separation of sludge using the above-mentioned solid-liquid separation device, the sludge tank is maintained at a higher water level than the filtration water tank and the solid-liquid separation operation is performed to concentrate the sludge. To do. The difference in water level at this time is preferably about 3 to 10 cm.
本発明の固液分離装置ではスクリーンとして、汚泥槽側に3°〜7°傾斜したウェッジワイヤを用い、散気配管より放出された気泡が汚泥槽側のスクリーン面に沿って上昇する構造としている。そのため、気泡がスリットと直交する方向に上昇し、スリット幅が微細なウェッジワイヤを用いても、スリットは汚泥により目詰まりすることもなく、効率よく固液分離操作ができ、比較的小さなスクリーン面積でも多量の汚泥を濃縮することができる。   In the solid-liquid separator of the present invention, a wedge wire inclined at 3 ° to 7 ° on the sludge tank side is used as the screen, and the bubbles released from the aeration pipe rise along the screen surface on the sludge tank side. . For this reason, even if a wedge wire with a fine slit width is used, the slits are not clogged with sludge, allowing efficient solid-liquid separation and relatively small screen area. But it can concentrate a lot of sludge.
さらに、散気配管より放出された気泡により汚泥が撹拌され、このことにより汚泥の浮遊固形物は細かく破砕され、かつその密度が大きくなり、静置による沈降がしやすくなることも見出された。そのため、本発明の固液分離装置を用いて濃縮された汚泥に、さらに沈降操作を加え、より濃縮することが容易にできる。さらに、浮遊固形物がろ過水槽側に洩れ出ても同様な性状となるため、ろ過水を放出する前に沈降操作を加え、放出水の汚泥を減少させることも容易にできる。   Furthermore, it was also found that sludge is agitated by bubbles released from the aeration pipe, and this makes it possible to finely crush sludge's suspended solids and increase its density, facilitating settling by standing. . Therefore, the sludge concentrated using the solid-liquid separator of the present invention can be further concentrated by adding a sedimentation operation. Furthermore, since the same property is obtained even when the floating solid leaks to the filtered water tank side, it is possible to easily reduce the sludge of the discharged water by adding a sedimentation operation before discharging the filtered water.
本発明の固液分離装置は以上のような作用、効果を有しており、この装置を用いて行う汚泥濃縮方法は、汚泥槽とろ過水槽との水位に差をつけ重力のみでろ過するものであり、簡易な装置で、容易な操作で固液分離する方法となる。   The solid-liquid separation device of the present invention has the above-described actions and effects, and the sludge concentration method performed using this device is to filter only by gravity with a difference in the water level between the sludge tank and the filtration water tank. This is a method for solid-liquid separation with a simple apparatus and easy operation.
このように本発明の固液分離装置は、排水処理に伴って発生する余剰汚泥の濃縮に好ましく適用されるが、これ以外にも、多量の固形浮遊物を含む泥水や懸濁水を凝集沈殿法させて発生した汚泥の固液分離にも適用し、凝集沈殿させた汚泥をさらに濃縮することもできる。   As described above, the solid-liquid separation device of the present invention is preferably applied to the concentration of excess sludge generated with wastewater treatment, but besides this, the mud and suspension water containing a large amount of solid suspended matter is coagulated and precipitated. It can also be applied to the solid-liquid separation of sludge generated and the sludge coagulated and precipitated can be further concentrated.
本発明の固液分離装置の平面図であるIt is a top view of the solid-liquid separator of the present invention 図1のA−A´線矢印方向に見た断面図である。It is sectional drawing seen in the AA 'line arrow direction of FIG. 実施例として、汚泥のMLSS濃度と汚泥処理量の面積負荷の関係を測定した結果を示す図である。It is a figure which shows the result of having measured the relationship between the MLSS density | concentration of sludge and the area load of sludge process amount as an Example.
以下、図により本発明の実施の形態を説明する。図1は本発明の固液分離装置の平面図であり、汚泥槽1とろ過水槽2とはスクリーン3を介して隣接して設置されている。スクリーン3はウェッジワイヤであり、図2に示すように、平坦面を汚泥槽1側とし、汚泥槽1側に垂直方向から約5°傾けて設置されている。ウェッジワイヤであるスクリーン3はスリットが水平方向になるように設置されている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of the solid-liquid separator of the present invention, in which a sludge tank 1 and a filtered water tank 2 are installed adjacent to each other through a screen 3. The screen 3 is a wedge wire, and as shown in FIG. 2, the flat surface is set to the sludge tank 1 side and is inclined to the sludge tank 1 side by about 5 ° from the vertical direction. The screen 3 which is a wedge wire is installed such that the slit is in the horizontal direction.
スクリーン3の汚泥槽1側の下部には、散気管4が設置されている。この散気管4は空気放出口が設けてあり、外部のコンプレッサーなどの空気供給源より供給された空気を汚泥6の液内に気泡として放出する。汚泥6内に放出された気泡はスクリーン3の汚泥槽1側の面に沿って上昇する。この場合、気泡はスクリーン3のスリットと直交する方向に上昇し、ろ過水8側にはほとんど洩れ出ることなく、スクリーン面上に汚泥が堆積するのを防ぐ作用をする。   A diffuser pipe 4 is installed in the lower part of the screen 3 on the sludge tank 1 side. The air diffuser 4 is provided with an air discharge port and discharges air supplied from an air supply source such as an external compressor into the sludge 6 as bubbles. The bubbles released into the sludge 6 rise along the surface of the screen 3 on the sludge tank 1 side. In this case, the bubbles rise in a direction perpendicular to the slits of the screen 3 and hardly leak to the filtered water 8 side, and act to prevent the accumulation of sludge on the screen surface.
さらに、スクリーン面に沿ってスリットと直交する方向に上昇した気泡は、汚泥の水面7に達した後、水面に沿って水平に移動し、再び汚泥6の内部に戻る。すなわち、図2では散気管4で放出された気泡は反時計回りに回りながら、汚泥6を撹拌することにもなる。本願発明においては、この気泡による汚泥6の撹拌により、汚泥中の浮遊物質が細かく粉砕されると共に、その密度も大きくなり、沈降し易くなることも見出された。   Further, the bubbles rising in the direction perpendicular to the slit along the screen surface reach the sludge water surface 7, move horizontally along the water surface, and return to the inside of the sludge 6 again. That is, in FIG. 2, the sludge 6 is stirred while the bubbles released from the air diffuser 4 rotate counterclockwise. In the present invention, it has also been found that by stirring the sludge 6 by the bubbles, suspended substances in the sludge are finely pulverized, the density thereof is increased, and it is easy to settle.
これらの作用により、本発明では汚泥6をスクリーン3でろ過を行い、ろ過水8を得るには、汚泥6とろ過水8の水位に差をつけておくだけで、ろ過を行うことができる。図2に示すように汚泥6の水面7の水位を、ろ過水8の水面9の水位より高く保つことでろ過作業を続けることができる。汚泥水面7とろ過水水面9との水位の差を保つには、汚泥注入口10を過水取出11より高い位置に設置しておくことで容易に実施できる。水面7と水面9との水の差は3〜10cm程度に設定して運転される。   By these actions, in order to obtain the filtered water 8 by filtering the sludge 6 with the screen 3 in the present invention, it is possible to perform the filtration only by making a difference between the water levels of the sludge 6 and the filtered water 8. As shown in FIG. 2, the filtering operation can be continued by keeping the water level of the water surface 7 of the sludge 6 higher than the water level of the water surface 9 of the filtered water 8. In order to maintain the difference in the water level between the sludge water surface 7 and the filtered water surface 9, it can be easily carried out by installing the sludge inlet 10 at a position higher than the excess water extraction 11. The water difference between the water surface 7 and the water surface 9 is set to about 3 to 10 cm.
(実施例)
スクリーンとして、図1、2に示した装置において、スリット幅が75μmのウェッジワイヤ(東洋スクリーン工業株式会社製、商品名ファインウェッジワイヤースクリーン)を用いて、スクリーンを垂直方向から5°汚泥側に傾けて設置し、汚泥の濃縮運転を行った。このときには、汚泥水面とろ過水水面の水位差は5〜10cmの範囲に保たれるように、汚泥の注入量とろ過水の排出量の調節を行って運転を行った。汚泥のMLSS濃度を約5,000〜30,000mg/Lの間で変化させ、各濃度における10分間のろ過水量を測定し、スクリーンの単位面積当たりの数値である面積負荷(L/m2・分)を求めた。各MLSS濃度のおける、面積負荷を図3に示す。図3において縦軸が面積負荷であり横軸がMLSS濃度であり、菱型の点が実際の測定値であり、曲線はそれぞれの測定値から近似したものである。
(Example)
In the apparatus shown in FIGS. 1 and 2, a wedge wire with a slit width of 75 μm (trade name Fine Wedge Wire Screen, manufactured by Toyo Screen Industries Co., Ltd.) is used as the screen, and the screen is tilted 5 ° from the vertical direction to the sludge side. Installed and performed sludge concentration operation. At this time, the operation was performed by adjusting the amount of sludge injected and the amount of filtered water discharged so that the water level difference between the sludge water surface and the filtrate water surface was maintained in the range of 5 to 10 cm. The MLSS concentration of sludge is changed between about 5,000 to 30,000 mg / L, the amount of filtered water for 10 minutes at each concentration is measured, and the area load (L / m 2 ···) is a numerical value per unit area of the screen. Min). The area load at each MLSS concentration is shown in FIG. In FIG. 3, the vertical axis is the area load, the horizontal axis is the MLSS concentration, the diamond-shaped points are the actual measured values, and the curve is approximated from each measured value.
図3から汚泥のMLSS濃度と面積負荷の関係を読み取り、スクリーン1m2当たりの一日の汚泥処理量(m3/日)を計算すると次のようになる。
MLSS 汚泥処理量
10,000 mg/L 4.79 m3/日
15,000 mg/L 3.53 m3/日
20,000 mg/L 2.63 m3/日
25,000 mg/L 2.09 m3/日
30,000 mg/L 1.91 m3/日

生活排水の日平均汚水量100m3/日当たりの汚泥発生量は、MLSS濃度10,000mg/Lとして0.72m3/日、MLSS濃度15,000mg/Lで0.48m3/日が標準である。従って、上記の汚泥処理量を生活排水の日平均汚水量に換算すると約600〜700m3/日に相当する目安量が得られ、1m2の大きさのスクリーンでこの量の生活排水に相当する汚泥処理が可能であると算出することができる。
Figure 3 reads the relationship between the MLSS concentration and area load of the sludge from, calculated sludge treatment daily doses per screen 1 m 2 of the (m 3 / day) is as follows.
MLSS sludge treatment amount 10,000 mg / L 4.79 m 3 / day 15,000 mg / L 3.53 m 3 / day 20,000 mg / L 2.63 m 3 / day 25,000 mg / L 2 0.09 m 3 / day 30,000 mg / L 1.91 m 3 / day

Sludge generated amount of average wastewater volume 100 m 3 / day domestic wastewater day, 0.72 m 3 / day as MLSS concentration 10,000mg / L, is the standard 0.48 m 3 / day at MLSS concentration 15,000 / L . Accordingly, when the above-mentioned sludge treatment amount is converted into the daily average sewage amount of domestic wastewater, a reference amount corresponding to about 600 to 700 m 3 / day is obtained, and this amount of domestic wastewater corresponds to a 1 m 2 screen. It can be calculated that sludge treatment is possible.
また、本装置でろ過処理を施した汚泥と処理を施さなかった汚泥とを、比較して沈降濃縮を行ったが、前者の沈降処理時間は後者の沈降処理時間に対して2/3位に短縮できた。   In addition, the sludge that was filtered with this device and the sludge that was not treated were compared and settled. The former sedimentation time was 2/3 of the latter sedimentation time. It was shortened.
本発明の固液分離装置および汚泥濃縮方法は、大掛かりな装置を必要とせず簡易な装置で処理が可能なため、有機性排水の処理に当たって発生する汚泥の濃縮に好ましく適用される。さらに、多量の固形浮遊物を含む泥水ないしは懸濁水を凝集沈殿させて発生した汚泥のさらなる濃縮にも適用できる。   The solid-liquid separation device and the sludge concentration method of the present invention are preferably applied to the concentration of sludge generated in the treatment of organic waste water because a large-scale device is not required and processing can be performed with a simple device. Furthermore, the present invention can also be applied to further concentration of sludge generated by coagulating and sedimenting mud or suspended water containing a large amount of solid suspended matter.
1 汚泥槽
2 ろ過水槽
3 スクリーン
4 散気管
5 スクリーン保持具
6 汚泥
7 汚泥水面
8 ろ過水
9 ろ過水水面
10 汚泥注入口
11 ろ過水排水口
DESCRIPTION OF SYMBOLS 1 Sludge tank 2 Filtration water tank 3 Screen 4 Aeration pipe 5 Screen holder 6 Sludge 7 Sludge water surface 8 Filtration water 9 Filtration water surface 10 Sludge injection port 11 Filtration water drainage port

Claims (3)

  1. スクリーンを介して隣接する汚泥槽とろ過水槽とが設置され、該スクリーンはウェッジワイヤであって、スリットを水平にし、かつスクリーン面を垂直方向に対し3°〜7°汚泥槽側に傾斜させて設置され、汚泥槽側のスクリーン面下部にはスクリーン散気配管が設置され、散気配管より放出された気泡が該スクリーン面に沿って上昇できることを特徴とする固液分離装置。   An adjacent sludge tank and a filtration water tank are installed through a screen, the screen is a wedge wire, the slit is horizontal, and the screen surface is inclined to the sludge tank side from 3 ° to 7 ° with respect to the vertical direction. A solid-liquid separation device, wherein a screen aeration pipe is installed at a lower part of the screen surface on the sludge tank side, and bubbles released from the aeration pipe can rise along the screen surface.
  2. ウェッジワイヤのスリット幅が30〜100μmであることを特徴とする請求項1に記載の固液分離装置。   2. The solid-liquid separator according to claim 1, wherein the wedge wire has a slit width of 30 to 100 μm.
  3. 請求項1もしくは2に記載の固液分離装置を用い、汚泥槽の水位をろ過水槽の水位より高く保って、汚泥の固液分離を行うことを特徴とする汚泥濃縮方法。   A sludge concentration method characterized in that the sludge solid-liquid separation is performed by using the solid-liquid separation device according to claim 1 or 2 and maintaining the water level of the sludge tank higher than the water level of the filtration water tank.
JP2009142002A 2009-06-15 2009-06-15 Solid-liquid separator for sludge concentration and method for sludge concentration Pending JP2010284613A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101162500B1 (en) 2012-02-21 2012-07-05 박태규 Water treatment apparatus
WO2021132065A1 (en) * 2019-12-27 2021-07-01 株式会社クボタ Organic matter concentration measuring method, and organic matter concentration measuring equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5976508A (en) * 1982-10-25 1984-05-01 Takane Kitao Filtering device
JP2000317482A (en) * 1999-05-07 2000-11-21 Ngk Insulators Ltd Fluidization separator for carrier
WO2002060554A1 (en) * 2001-02-01 2002-08-08 Suikenkikou Co., Ltd Aeration type underwater screen system
JP2005095743A (en) * 2003-09-24 2005-04-14 Sumitomo Chemical Co Ltd Solid-liquid separation device and solid-liquid separation method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5976508A (en) * 1982-10-25 1984-05-01 Takane Kitao Filtering device
JP2000317482A (en) * 1999-05-07 2000-11-21 Ngk Insulators Ltd Fluidization separator for carrier
WO2002060554A1 (en) * 2001-02-01 2002-08-08 Suikenkikou Co., Ltd Aeration type underwater screen system
JP2005095743A (en) * 2003-09-24 2005-04-14 Sumitomo Chemical Co Ltd Solid-liquid separation device and solid-liquid separation method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101162500B1 (en) 2012-02-21 2012-07-05 박태규 Water treatment apparatus
WO2021132065A1 (en) * 2019-12-27 2021-07-01 株式会社クボタ Organic matter concentration measuring method, and organic matter concentration measuring equipment

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