JPH11128967A - Apparatus for treating waste water - Google Patents
Apparatus for treating waste waterInfo
- Publication number
- JPH11128967A JPH11128967A JP29144797A JP29144797A JPH11128967A JP H11128967 A JPH11128967 A JP H11128967A JP 29144797 A JP29144797 A JP 29144797A JP 29144797 A JP29144797 A JP 29144797A JP H11128967 A JPH11128967 A JP H11128967A
- Authority
- JP
- Japan
- Prior art keywords
- filter medium
- web
- tank
- processing tank
- medium layer
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、下水二次処理水
等の有機性で、比較的低濃度の汚水の高度処理装置並び
にろ材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an advanced treatment apparatus for organic wastewater having a relatively low concentration, such as sewage secondary treatment water, and a filter medium.
【０００２】[0002]
【従来の技術】従来、有機性汚水の処理装置は公知であ
る。比重が１．０以上の砂、アンスラサイト、セラミッ
ク等のろ材を用いた処理装置はよく知られている。ま
た、比重が１に近い浮上性のろ材を用いた処理装置は多
数あり、これらの装置に用いられているろ材の形状およ
び寸法は、直方体や円柱状や球状さらにはこれらを偏平
状にしたもので、１辺や径が１０ｍｍを越えるものが多
数ある。これらは、ろ層の目詰まり防止と、ろ過抵抗減
少のため径を大きくしているが、ろ材寸法が大きすぎる
と、ろ過抵抗が均一ではなく、抵抗の低い部分に被処理
水が多く流れる、いわゆる偏流現象が生じ、処理にＳＳ
がもれやすい欠点がある。さらに、合成繊維を束ねた
り、繭状に成形した繊維ろ材もあり、これらは一種類の
繊維からできたものが多く、ろ過抵抗が上昇したり、水
抜き時に重力により強く押し付けられ、変形することが
ある。2. Description of the Related Art Conventionally, apparatuses for treating organic wastewater are known. Processing apparatuses using a filter medium such as sand, anthracite, and ceramic having a specific gravity of 1.0 or more are well known. In addition, there are a large number of processing apparatuses using a buoyant filter medium having a specific gravity close to 1, and the shape and dimensions of the filter medium used in these apparatuses are rectangular parallelepiped, columnar, spherical, or flattened. In many cases, one side or diameter exceeds 10 mm. In these, the diameter is increased to prevent clogging of the filter layer and to reduce filtration resistance.However, if the filter medium size is too large, the filtration resistance is not uniform, and a large amount of water to be treated flows to a low resistance portion. The so-called drift phenomenon occurs, and SS
There is a drawback that leaks easily. In addition, there are also fiber filters that are made by bundling or cocoon-shaped synthetic fibers.Most of these are made of one type of fiber, which increases the filtration resistance and can be deformed by being strongly pressed by gravity when draining water. There is.
【０００３】[0003]
【発明が解決しようとする課題】従来の比重が１に近い
浮上性のろ材を用いた処理装置では、ろ材が砂等のろ過
装置のろ過速度では、ろ材の圧密度が十分でなく、ろ層
内を上昇する空気と共にＳＳが処理水に抜け出ることが
ある。また比重の大きいアンスラサイトやセラミックろ
材、あるいは比重が極端に小さい発泡性のろ材等では、
空隙率が小さくＳＳによる目詰まりが短時間で生じ、洗
浄頻度が高くなるし、洗浄に大きな動力を必要とする。
さらに、寸法の大きいろ材では偏流現象が生じ、処理水
にＳＳがもれることがある。また、上向流式好気性ろ床
は、原水と空気が同一方向に流れるのでＳＳが処理水に
もれやすい欠点がある。In a conventional processing apparatus using a buoyant filter medium having a specific gravity close to 1, the pressure density of the filter medium is not sufficient at the filtration speed of a filter apparatus such as sand, and the filter medium has a poor filter density. The SS may escape into the treated water together with the air rising inside. In the case of anthracite or ceramic filter media with a large specific gravity, or foamable filter media with an extremely small specific gravity,
Porosity is small, clogging by SS occurs in a short time, cleaning frequency increases, and large power is required for cleaning.
Further, a drift phenomenon occurs in a filter medium having a large size, and SS may leak into treated water. Further, the upward flow type aerobic filter bed has a drawback that SS easily leaks to the treated water since raw water and air flow in the same direction.
【０００４】[0004]
【課題を解決するための手段】この発明は、ろ材に工夫
をすることと、ろ材層高と水層高との比率を工夫するこ
とによって微細なＳＳまでも捕捉しながら、目詰まりし
難くかつ逆洗が容易なろ材層を形成したものである。す
なわち、ろ材として素材が芯をポリプロピレン、鞘をポ
リエチレンとした熱融着性複合繊維で繊度が１８〜６５
デニールである第１フィラメントと、素材がポリプロピ
レン繊維で繊度が３〜１０デニールである第２フィラメ
ントと、素材が芯をポリプロピレン、鞘をポリエチレン
とした熱融着性複合繊維で繊度が１．５〜６デニールで
ある第３フィラメントを混綿したウェッブをニードルパ
ンチング法により布形化し、両面のウェッブ起毛状態を
平滑化することなく加熱処理し、前記ウェッブの重量が
２００〜８００ｇ／平方メートル、厚みが２〜８ｍｍの
布形化板状体を製作し、この布形化板状体を３〜５ｍｍ
角に裁断したものを用いることである。SUMMARY OF THE INVENTION According to the present invention, a filter medium is devised and a ratio of a filter medium layer height to a water layer height is devised so that even a fine SS is not clogged while being clogged. A filter material layer that is easy to backwash is formed. That is, as a filter medium, the material is a heat-fusible conjugate fiber having a core of polypropylene and a sheath of polyethylene and a fineness of 18 to 65.
A first filament which is denier, a second filament whose material is polypropylene fiber and fineness is 3 to 10 denier, and a fineness of heat-fusible composite fiber whose material is polypropylene as core and polyethylene as sheath and 1.5 to fineness A web mixed with a 6-denier third filament is formed into a cloth by a needle punching method, and is heat-treated without smoothing the raised state of the web on both sides. An 8 mm cloth-shaped plate is manufactured, and this cloth-shaped plate is 3 to 5 mm.
It is to use the one cut to the corner.
【０００５】また、ろ材層高と水層高との比率を６５：
３５〜５０：５０とすることで、ろ材の洗浄を容易にし
た。さらに、ろ材の圧密不足や、原水と空気が同一方向
に流れるので、空気と共にＳＳが処理水にもれやすい欠
点を、高負荷の好気性ろ床の約１０倍のろ過速度でろ過
することで、圧密度を高くして解決したものである。Further, the ratio of the height of the filter medium layer to the height of the water layer is set to 65:
By setting the ratio to 35 to 50:50, washing of the filter medium was facilitated. In addition, the disadvantage of insufficient consolidation of the filter media and the drawback that the raw water and air flow in the same direction, so that the SS easily leaks to the treated water together with the air, can be filtered at approximately 10 times the filtration rate of a high-load aerobic filter bed. The problem was solved by increasing the compaction density.
【０００６】[0006]
【発明の実施の形態】上記布形化板状体ろ材は、不織布
であるため空隙率が大きく、微生物の付着に優れてい
る。このため、ろ層中の微生物量を大きく保つことがで
き、ＳＳのみならず有機性の汚濁物質いわゆるＢＯＤも
除去できるものである。また、ろ過圧力や水抜き時の重
力による押しつぶれを防止するため、太さの異なる３種
類のフィラメントを用いている。上記布形化板状体ろ材
は、密に詰まっているのに空隙率が大きいので、目詰ま
りによる圧力損失は小さく、ろ過時間が長い。洗浄は、
ろ材層高：水層高の比を６５：３５〜５０：５０とする
ことで、下方からの散気で容易に流動し、捕捉されたＳ
Ｓや余剰汚泥を分離することができる。この時の空気量
はアンスラサイトやセラミックろ材の装置に比べ、少な
くてすむ。また、上向流式の欠点であるＳＳ漏れについ
ては、高速でろ過することで解決し、従来より低いＳＳ
の処理水が得られる。以下この発明に係るろ材を用いた
汚水処理装置を図面に基づいて説明する。BEST MODE FOR CARRYING OUT THE INVENTION The above-mentioned cloth-shaped plate-shaped filter medium is a non-woven fabric, so that it has a high porosity and is excellent in adhering microorganisms. Therefore, the amount of microorganisms in the filter layer can be kept large, and not only SS but also organic pollutants, so-called BOD, can be removed. In addition, three types of filaments having different thicknesses are used in order to prevent crushing due to gravity at the time of filtration pressure or drainage. The cloth-shaped plate-shaped filter medium is densely packed but has a high porosity, so that pressure loss due to clogging is small and filtration time is long. Washing is
By setting the ratio of the filter medium layer height to the water layer height to 65:35 to 50:50, S that easily flows and diffuses from the lower side and is trapped.
S and excess sludge can be separated. At this time, the amount of air is smaller than that of a device using anthracite or ceramic filter media. In addition, SS leakage, which is a drawback of the upward flow type, can be solved by filtering at high speed.
Of treated water is obtained. Hereinafter, a sewage treatment apparatus using a filter medium according to the present invention will be described with reference to the drawings.
【０００７】[0007]
【実施例】図１は、この発明に係る処理装置を示し、図
１において、符号１はその下部を逆円錐状に形成して沈
殿部１ａを設けた処理槽、２は処理槽１に装入したろ
材、３はろ材層内の下部に設けた曝気用エアノズル、４
はドラフトチューブ１５の下部に設けたろ材攪拌用エア
ノズルである。次に、符号５は原水の供給管であり、符
号６は処理水の越流トラフ、７は処理水の取り出し管、
８は循環水の取出管、９は沈殿物の引抜管、１０は曝気
用のブロワ、１１は洗浄用のブロワ、１２は循環用のポ
ンプ、１３はろ材の係止網である。この発明に係る装置
は、上述のように構成してあり、原水は供給管５から処
理槽１に供給される。そして、ろ材層中を上昇して微細
な夾雑物が捕捉除去され、処理槽１の上部を通り越流ト
ラフ６、処理水の取り出し管７を経て清澄水として取り
出すことができる。1 shows a processing apparatus according to the present invention. In FIG. 1, reference numeral 1 denotes a processing tank having a lower portion formed in an inverted conical shape and provided with a settling portion 1a, and 2 denotes a processing tank. The filter media that has entered, 3 is an air nozzle for aeration provided at the lower part in the filter media layer, 4
Is an air nozzle for stirring the filter medium provided at the lower part of the draft tube 15. Next, reference numeral 5 denotes a supply pipe for raw water, reference numeral 6 denotes an overflow trough of treated water, reference numeral 7 denotes a pipe for taking out treated water,
Reference numeral 8 denotes a circulating water discharge pipe, 9 denotes a sediment withdrawing pipe, 10 denotes an aeration blower, 11 denotes a cleaning blower, 12 denotes a circulation pump, and 13 denotes a filter material locking net. The apparatus according to the present invention is configured as described above, and raw water is supplied to the treatment tank 1 from the supply pipe 5. Then, the fine impurities are trapped and removed by ascending in the filter medium layer, and can be taken out as clear water through the overflow trough 6 and the treated water take-out pipe 7 passing through the upper part of the treatment tank 1.
【０００８】一方、これと同時に曝気用ブロワ１０を作
動させて、曝気用エアノズル３から散気することで、ろ
材２の表面および内部に保持された微生物を活性化する
ことができ、連続して供給される原水中の有機性汚濁物
を、連続して分解処理することができる。次に、このよ
うな運転をして、ろ材層が夾雑物および有機物質の分解
時に生じた汚泥等で目詰まりしたときは、原水の供給を
停止して、処理水取り出し弁７ａを閉じ、処理槽１の底
部の沈殿物を引抜管９から抜き取り、ついで、洗浄用ブ
ロワ１１を作動させて、ろ材攪拌用エアノズル４から給
気を行いドラフトチューブ１５を介してろ材２を５〜１
０分攪拌する。このとき、ドラフトチューブ１５によっ
て処理槽１内に上下方向の循環流が生じろ材２の洗浄が
容易である。その後、ろ材攪拌用エアノズル４からの給
気を続けながら、洗浄水を洗浄水管１４と原水供給管５
ａから供給する。ろ材２から剥離した夾雑物や余剰汚泥
を含む排水は、処理槽１の上部、越流トラフ６、処理水
の取り出し管７を経て排水管７ｂから５〜１５分間槽外
へ排出される。次に、洗浄用ブロワ１１を停止すると共
に、循環弁８ａを開、洗浄水弁１４ａを閉として洗浄水
の供給を停止し、約５分間循環のみを行う。その後、原
水の供給と曝気用ブロワの運転を開始してろ過を行い、
１０〜２０分間処理水を排出し、その後処理水取り出し
弁７ａを開とすることにより処理水の取り出し管７を経
て清澄水として取り出すことができる。On the other hand, by simultaneously operating the aeration blower 10 and diffusing air from the aeration air nozzle 3, the microorganisms retained on the surface and inside of the filter medium 2 can be activated, and continuously. The organic pollutants in the supplied raw water can be continuously decomposed. Next, when the filter medium layer is clogged with sludge or the like generated during decomposition of impurities and organic substances by performing such an operation, the supply of raw water is stopped, the treated water removal valve 7a is closed, and the treated water is closed. The sediment at the bottom of the tank 1 is withdrawn from the withdrawal pipe 9, and then the cleaning blower 11 is operated to supply air from the air nozzle 4 for stirring the filter medium, and the filter medium 2 is discharged through the draft tube 15 to remove the filter medium 2 from the 5-1.
Stir for 0 minutes. At this time, a vertical circulating flow is generated in the processing tank 1 by the draft tube 15, and the filter medium 2 is easily washed. Thereafter, the washing water is supplied to the washing water pipe 14 and the raw water supply pipe 5 while the air supply from the filter medium stirring air nozzle 4 is continued.
Supply from a. Drainage containing impurities and excess sludge separated from the filter medium 2 is discharged from the drainage pipe 7b through the upper part of the treatment tank 1, the overflow trough 6, and the treated water take-out pipe 7 for 5 to 15 minutes outside the tank. Next, the cleaning blower 11 is stopped, the circulation valve 8a is opened, and the cleaning water valve 14a is closed to stop supplying the cleaning water, and only circulation is performed for about 5 minutes. After that, supply of raw water and operation of the blower for aeration were started to perform filtration,
After discharging the treated water for 10 to 20 minutes, and then opening the treated water take-out valve 7a, the treated water can be taken out as clear water through the treated water take-out pipe 7.
【０００９】[0009]
【発明の効果】以上のように、この発明では布形化板状
体ろ材を用いた汚水の処理装置において、高速（３０〜
１００ｍ／時）でろ過すること、およびろ材層高と水層
高との比率を６５：３５〜５０：５０となるように装入
したことを特徴とするもので、このことにより微細なＳ
Ｓや有機性汚濁物質を単一槽で除去ができること、ブロ
ワ動力の節減が可能となったこと、およびろ材洗浄を容
易にできるようになったものである。As described above, according to the present invention, in a wastewater treatment apparatus using a cloth-shaped plate-like filter medium, a high-speed (30 to
100 m / h), and the ratio between the height of the filter medium layer and the height of the water layer is 65:35 to 50:50.
It is possible to remove S and organic pollutants in a single tank, to reduce the power of the blower, and to easily clean the filter medium.
【図１】この発明に係る汚水の処理装置の縦断側面図で
ある。FIG. 1 is a vertical side view of a wastewater treatment apparatus according to the present invention.
１ 処理槽 ２ ろ材 ３ 曝気用エアノズル ４ ろ材攪拌用エアノズル ５ 供給管 ７ 処理水の取出管 ９ 引抜管 １５ ドラフトチューブ DESCRIPTION OF SYMBOLS 1 Processing tank 2 Filter medium 3 Air nozzle for aeration 4 Air nozzle for agitating filter medium 5 Supply pipe 7 Pipe for taking out treated water 9 Extraction pipe 15 Draft tube
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ０１Ｄ 29/38 ５８０Ｆ ──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. 6 Identification code FI B01D 29/38 580F
Claims (3)
状の処理槽１で、上部にろ材流出防止材を設置して、そ
の下方に合成樹脂繊維材で構成したろ材２を装入し、そ
のろ材層内の下部に曝気用エアノズル３を設けるととも
に、処理槽１内の中心部に処理槽１と同心円のドラフト
チューブ１５を立設し、そのドラフトチューブ１５の下
方にろ材攪拌用エアノズル４を設け、さらに、処理槽１
の下部に原水の供給管５を、処理槽１上部に処理水の取
出管７を、処理槽１下底部に沈殿物の引抜管９を設けて
成る汚水の処理装置。1. A cylindrical treatment tank 1 having an inverted conical settling section formed at the bottom, a filter medium outflow prevention material is installed at the top, and a filter medium 2 made of synthetic resin fiber material is loaded below the filter medium outflow prevention material. An air nozzle 3 for aeration is provided in the lower part of the filter medium layer, and a draft tube 15 concentric with the processing tank 1 is erected at the center of the processing tank 1, and an air nozzle for stirring the filter medium is provided below the draft tube 15. 4 and processing tank 1
A wastewater treatment apparatus comprising a raw water supply pipe 5 provided at a lower part of the treatment tank 1, a treated water take-out pipe 7 provided at an upper part of the treatment tank 1, and a sediment withdrawal pipe 9 provided at a lower bottom part of the treatment tank 1.
リプロピレン、鞘をポリエチレンとした熱融着性複合繊
維で繊度が１８〜６５デニールである第１フィラメント
と、素材がポリプロピレン繊維で繊度が３〜１０デニー
ルである第２フィラメントと、素材が芯をポリプロピレ
ン、鞘をポリエチレンとした熱融着性複合繊維で繊度が
１．５〜６デニールである第３フィラメントを混綿した
ウェッブをニードルパンチング法により布形化し、両面
のウェッブ起毛状態を平滑化することなく加熱処理し、
前記ウェッブの重量が２００〜８００ｇ／平方メート
ル、厚みが２〜８ｍｍの布形化板状体を製作し、この布
形化板状体を３〜５ｍｍ角に裁断したものを生物膜ろ材
として用いていることを特徴とする請求項１記載の汚水
の処理装置。2. The synthetic resin fiber filter medium 2 is a heat-fusible conjugate fiber having a core of polypropylene and a sheath of polyethylene, a first filament having a fineness of 18 to 65 denier, and a raw material of polypropylene fiber having a fineness. Needle punching a web obtained by mixing a second filament having a denier of 3 to 10 and a third filament having a fineness of 1.5 to 6 denier with a heat-fusible conjugate fiber having a core of polypropylene and a sheath of polyethylene. Heat treatment without smoothing the web brushed state on both sides,
A web-shaped plate having a web weight of 200 to 800 g / m 2 and a thickness of 2 to 8 mm was manufactured, and the web-shaped plate was cut into 3 to 5 mm squares and used as a biofilm filter medium. The sewage treatment apparatus according to claim 1, wherein
材層高と水層高との比率が６５：３５〜５０：５０とな
るように、上記ろ材２を処理槽１に装入したことを特徴
とする、請求項１および請求項２記載の汚水の処理装
置。3. The filter medium 2 is charged into the processing tank 1 such that the ratio of the height of the filter medium layer to the height of the aqueous layer is 65:35 to 50:50 when the raw water is injected into the processing tank 1. The sewage treatment apparatus according to claim 1, wherein the sewage treatment apparatus according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29144797A JPH11128967A (en) | 1997-10-24 | 1997-10-24 | Apparatus for treating waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29144797A JPH11128967A (en) | 1997-10-24 | 1997-10-24 | Apparatus for treating waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11128967A true JPH11128967A (en) | 1999-05-18 |
Family
ID=17768994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29144797A Pending JPH11128967A (en) | 1997-10-24 | 1997-10-24 | Apparatus for treating waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11128967A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040051963A (en) * | 2002-12-13 | 2004-06-19 | (주)멤브레인워터 | Membrane coupled High-performance Compact Reactor System |
| KR100447812B1 (en) * | 2001-04-18 | 2004-09-10 | (주)에코데이 | Process and plant of the ubr formation for wastewater treatment |
| JP2006192429A (en) * | 2004-12-27 | 2006-07-27 | Kang Na Hsing Enterprise Co Ltd | Method for treating polluted fluid, system for treating polluted fluid, and method for producing biomass carrier suitable for treating polluted fluid |
-
1997
- 1997-10-24 JP JP29144797A patent/JPH11128967A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100447812B1 (en) * | 2001-04-18 | 2004-09-10 | (주)에코데이 | Process and plant of the ubr formation for wastewater treatment |
| KR20040051963A (en) * | 2002-12-13 | 2004-06-19 | (주)멤브레인워터 | Membrane coupled High-performance Compact Reactor System |
| JP2006192429A (en) * | 2004-12-27 | 2006-07-27 | Kang Na Hsing Enterprise Co Ltd | Method for treating polluted fluid, system for treating polluted fluid, and method for producing biomass carrier suitable for treating polluted fluid |
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