JPH03217296A - Biological denitrifying device - Google Patents
Biological denitrifying deviceInfo
- Publication number
- JPH03217296A JPH03217296A JP2011950A JP1195090A JPH03217296A JP H03217296 A JPH03217296 A JP H03217296A JP 2011950 A JP2011950 A JP 2011950A JP 1195090 A JP1195090 A JP 1195090A JP H03217296 A JPH03217296 A JP H03217296A
- Authority
- JP
- Japan
- Prior art keywords
- bed
- tank
- floating filter
- raw water
- biological
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 238000007667 floating Methods 0.000 claims description 36
- 239000007789 gas Substances 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000002351 wastewater Substances 0.000 abstract description 13
- 241000894006 Bacteria Species 0.000 abstract description 6
- 239000012528 membrane Substances 0.000 abstract 1
- 238000004062 sedimentation Methods 0.000 description 22
- 238000004140 cleaning Methods 0.000 description 21
- 238000000034 method Methods 0.000 description 15
- 238000005273 aeration Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- 238000005406 washing Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 241000894007 species Species 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001546 nitrifying effect Effects 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000009825 accumulation Methods 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
- 239000000701 coagulant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000852 hydrogen donor Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
Landscapes
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ＳＳ，ＢＯＤ， ＮＨａ−Ｎ， ＰＯｓ’−
等を含有する下水その他の有機性汚水を単一槽で高度に
処理することができる生物学的脱窒素装置に間するもの
である．
〔従来の技術〕
例えば、下水を活性汚泥法により生物学的脱窒素処理す
る場合、
というフローで行われている。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to SS, BOD, NHa-N, POs'-
This system is connected to a biological denitrification system that can highly treat sewage and other organic wastewater containing substances such as sewage and other organic wastewater in a single tank. [Conventional technology] For example, when sewage is subjected to biological denitrification treatment using the activated sludge method, the flow is as follows.
一方、近年、砂，アンスラサイトなどのが材を用いた好
気性生物が床法及び嫌気性生物炉床法が開発され、これ
らを用いた生物学的硝化脱窒素プロセスが試験されてい
る。即ち、
というフローで硝化脱窒素を行う方法が、試験的に検討
されている。On the other hand, in recent years, an aerobic biological bed method and an anaerobic biological hearth method using materials such as sand and anthracite have been developed, and biological nitrification and denitrification processes using these methods have been tested. In other words, a method of performing nitrification and denitrification using the following flow is being experimentally studied.
しかしながら、前記従来の活性汚泥法による生物学的脱
窒素処理においては、設備の設１面積，建設費が多大で
あり、ＮＨ４−Ｈの硝化用の空気ブロワーの動力も大き
いという問題点があり、しかも“最初沈殿池”と“最終
沈殿池”におけるＳＳの沈降分離が不安定であり、処理
水質の悪化をしばしば招いていた。However, in biological denitrification treatment using the conventional activated sludge method, there are problems in that the installation area and construction cost of the equipment are large, and the power of the air blower for nitrification of NH4-H is also large. Furthermore, the sedimentation and separation of SS in the "first settling tank" and "final settling tank" was unstable, often leading to deterioration of the quality of treated water.
一方、前記従来の生物が床法を用いた生物学的硝化脱窒
素プロセスでも、前記フローのように３つの装置を別個
に必要とし、設置面積１建設費が多大であるという問題
点をもっており、前記の活性汚泥による生物学的脱窒素
処理に比較して、格別のメリソトが得られていないのが
現状である。On the other hand, even the conventional biological nitrification and denitrification process using the biological bed method has the problem that three separate devices are required as in the flow method, and the construction cost per installation area is large. The current situation is that compared to the biological denitrification treatment using activated sludge described above, exceptional nitrogen removal cannot be obtained.
本発明は、前記従来技術の欠点を解決することを課題と
しており、具体的には、■単一槽でＳＳ除去， ＢＯＤ
除去，硝化脱窒素処理を完結させ、■このことによって
、省スペース，建設費低減，維持管理性の向上を実現し
、■決材の洗浄用水として清澄処理水の使用を不要とし
、■が材の洗浄排水の処理のための別個の沈殿池を不要
にする、こと等を課題としている。The present invention aims to solve the above-mentioned drawbacks of the prior art.Specifically,
By completing the removal, nitrification and denitrification treatment, ■This saves space, reduces construction costs, and improves maintenance and management.■It eliminates the need to use clarified water for washing the final materials, and The goal is to eliminate the need for a separate sedimentation tank for the treatment of cleaning wastewater.
本発明は、槽内の上方部に浮上Ｊ材層を保持し、該浮上
濾材層内の中間部に酸素含有ガスの散気装置を配備し、
浮上濾材層より下方部を沈殿部とし、該沈殿部に原水流
入部を設け、さらに槽上部に処理水流出部を設けると共
に、処理水流出部から流出する処理水の一部を前記浮上
濾材層下部へ循環する循環路を設けたことを特徴とする
生物学的脱窒素装置である。The present invention maintains a floating J material layer in the upper part of the tank, and provides an oxygen-containing gas diffuser in the middle part of the floating filter material layer.
A part below the floating filter layer is a sedimentation part, a raw water inflow part is provided in the sedimentation part, a treated water outflow part is provided in the upper part of the tank, and a part of the treated water flowing out from the treated water outflow part is transferred to the floating filter material layer. This is a biological denitrification device characterized by providing a circulation path to the lower part.
上記のように構成された槽内下方部の沈殿部に、原水流
入部から下水などの有機性汚水を流入し、沈降ＳＳを沈
降分離する。この場合、ＳＳの沈降性の促進と脱リンを
目的として、原水中に凝集剤を注入することが好ましい
。Organic sewage such as sewage flows into the sedimentation section in the lower part of the tank configured as described above from the raw water inflow section, and sedimentation SS is separated by sedimentation. In this case, it is preferable to inject a flocculant into the raw water for the purpose of accelerating the sedimentation of SS and dephosphorizing it.
さて、沈殿部でＳＳの大部分が沈降分離された原水は、
上向流となって、上方に保持されている浮上濾材層に、
好ましくは上向流速２０〜３０ｍ／日程度で進入してゆ
く。Now, the raw water in which most of the SS has been sedimented and separated in the sedimentation section is
It becomes an upward flow and reaches the floating filter medium layer held above.
Preferably, it advances at an upward flow rate of about 20 to 30 m/day.
浮上濾材層の中間部には散気装置から空気などの酸素含
有ガスが散気され、散気装置の上方が好気性が床部、下
方が嫌気性が床部に構成されており、嫌気性炉床部には
主に脱窒素菌の生物膜が優占種として発達しているため
、上自流する原水は、沈殿部で沈降しきれなかった微細
ｓｓがが過除去されると共に、生物学的な脱窒素（Ｎｏ
Ｘ−ＮのＮ２への還元反応）が進行する。この嫌気性が
床部がら上方に流れる水は、さらに硝化菌の生物膜が優
占種として発達している好気性が床部に進入し、散気装
置から供給される酸素を利用して、Ｎ｝ｌ．−Ｈの硝化
反応が進行する。Oxygen-containing gas such as air is diffused from an aeration device to the middle part of the floating filter layer, and the upper part of the aeration device is an aerobic floor part, and the lower part is an anaerobic floor part. Because the biofilm of denitrifying bacteria has developed as the dominant species in the hearth, the raw water flowing upstream is over-removed of fine SS that could not be completely settled in the sedimentation area, and biological denitrification (No.
(reduction reaction of X-N to N2) proceeds. This anaerobic water flows upward through the floor, and aerobic water, in which a biofilm of nitrifying bacteria has developed as the dominant species, enters the floor and utilizes the oxygen supplied from the air diffuser. N}l. -H nitrification reaction progresses.
なお、嫌気性が床部において生成するＮ２ガス気泡も、
好気性が床部内を通過して、水面から大気中に散逸する
。In addition, the N2 gas bubbles generated in the anaerobic floor also
Aerobic gas passes through the bed and dissipates from the water surface into the atmosphere.
このようにして、好気性が床部を経て浮上濾材層の上部
から泉のように湧出する清澄な処理水は公共用水域に放
流される。この処理水にはＮＯ．−Ｎが含まれているた
め、流出する処理水の一部を浮上濾材層の下部ヘリサイ
クルし、上向流で嫌気性が床部内に進入させ、脱窒素菌
生物膜によって、水中のＮＯ，−ＮがＮ２ガスに還元さ
れる。In this way, aerobic, clear treated water gushes out from the top of the floating filter layer like a spring through the bed and is discharged into public water bodies. This treated water has NO. - Since it contains N, a part of the treated water that flows out is recycled to the lower part of the floating filter layer, and the anaerobic water enters the bed in an upward flow, and NO in the water is removed by the denitrifying bacteria biofilm. -N is reduced to N2 gas.
なお、原水中の有機炭素源が不足する場合には、メタノ
ール，エタノール，酢酸などの有機炭素源を返送される
処理水と共に添加し、脱窒素のための水素供与体とする
．
なお、浮上濾材層下部の嫌気性炉床部は、単に脱窒素反
応とＳＳＯ枦過除去を行うだけでなく、次のような重要
な機能をもっている。In addition, if the organic carbon source in the raw water is insufficient, an organic carbon source such as methanol, ethanol, or acetic acid is added together with the returned treated water to serve as a hydrogen donor for denitrification. The anaerobic hearth below the floating filter layer not only performs denitrification reaction and SSO filtration removal, but also has the following important functions.
即ち、嫌気性炉床部が存在しない場合には、散気装置か
ら散気される酸素含有ガス気泡の上昇によって引き起こ
される水流の乱れが沈殿部にまで波及し、ＳＳの沈降を
阻害してしまうが、本発明では散気装置の下部に嫌気性
が床部が配備され、散気による水流の乱れをここで抑止
，整流することができるので、沈殿部での沈降分離を効
果的に行うことができる。That is, if an anaerobic hearth part does not exist, the turbulence of water flow caused by the rise of oxygen-containing gas bubbles diffused from the aeration device will spread to the settling part, inhibiting the settling of the SS. However, in the present invention, an anaerobic floor section is provided at the bottom of the aeration device, and the turbulence of water flow caused by aeration can be suppressed and rectified here, so that sedimentation separation in the settling section can be effectively performed. I can do it.
さて、上記のような処理を継続するに伴い、浮上濾材層
においては、ＳＳの蓄積及び生物膜の増殖に起因してが
抗が上昇するので、所定のが抗（５００〜１０ ０ ０
ｍ Ｈ ２ ０程度）に達した時点で浮上濾材層の洗
浄を行う。Now, as the above-mentioned treatment continues, the resistance of the floating filter medium layer increases due to the accumulation of SS and the growth of biofilm.
The floating filter medium layer is washed when the temperature reaches approximately 0 m H 2 0).
浮上濾材層の洗浄には種々の方法を採用できるが、例え
ば、原水を流入させたまま散気装置からの散気量を急増
させ、浮上濾材層全体を激しく攬乱しながらＳＳを洗出
する方法が推奨できる。浮上濾材層を攪乱すると、ＳＳ
が効果的に洗出され、上部から洗浄排水が流出してくる
が、この洗浄排水を沈殿部に供給し、洗浄排水中のＳＳ
を沈降分離することか好ましい。この際、カナオンポリ
マなどの高分子凝集剤を注入すると、洗浄排水中のＳＳ
を大粒径のフロノクにすることができ、著しく沈降性を
向上させることができる。Various methods can be used to clean the floating filter layer, but for example, the amount of air diffused from the aeration device is rapidly increased while raw water is allowed to flow in, and the SS is washed out while violently agitating the entire floating filter layer. A method can be recommended. When the floating filter layer is disturbed, SS
is effectively washed out, and washing wastewater flows out from the upper part. This washing wastewater is supplied to the sedimentation section, and the
Preferably, it is separated by sedimentation. At this time, if a polymer flocculant such as Kanaon Polymer is injected, SS in the cleaning wastewater can
can be made into large particle size flonox, and the sedimentation properties can be significantly improved.
沈殿部でＳＳが除去されて清澄となった洗浄排水は、反
転して再び浮上濾材層に流入し、洗浄用水として再利用
される。従って、浮上濾材層の洗浄に、従来のように清
澄な処理水を浪費する必要がなく、処理水の生産効率が
高まる。The cleaning waste water, which has become clear by removing SS in the sedimentation section, is reversed and flows into the floating filter layer again, where it is reused as cleaning water. Therefore, it is not necessary to waste clear treated water for cleaning the floating filter medium layer as in the conventional method, and the production efficiency of treated water is increased.
以上の洗浄工程を要約すると、次のようなモードとなる
。To summarize the above cleaning process, the modes are as follows.
■ 原水を流入させながら、散気量を急増させて浮上濾
材層を攪乱し、ＳＳを洗出する。■ While raw water is flowing in, the amount of aeration is rapidly increased to disturb the floating filter layer and wash out SS.
集
■ 原水流入量が浮上が材屡の容積と等しくなった時点
で、原水の流入を停止し、以後は清澄化処理された洗浄
排水を洗浄用水として利用する。■ When the amount of raw water inflow becomes equal to the volume of floating material, the inflow of raw water is stopped, and from then on, the clarified cleaning wastewater is used as cleaning water.
８
■ 洗浄排水のＳＳが所定値まで低下した時点で洗浄を
終了する。8 ■ When the SS of the cleaning wastewater drops to a predetermined value, the cleaning ends.
なお、浮上濾材層の下部（嫌気性が床部の下部）にも散
気装置を配備し、浮上濾材層の洗浄時にのみ、空気を散
気して洗浄を促進することもできる．〔実施例〕
本発明の一実施例を、第１図に基づいて説明すれば、１
は槽体であって、槽内の上方部には、発泡ボリブロピレ
ン，発泡スチロール，木材チップ，軽石．ガラスマイク
ロバルーンなどの比重が１．０未満の水に浮く浮上が材
を充填した浮上濾材層２が設けられ、その上部をネソト
などの通水性の支持部材３で覆って浮上枦材層２の流出
を防いでいるが、比重が１．０に近い浮上が材を使用す
る時には、水面上への露出率が小さいので、必ずしも支
持部材３を必要としない。It is also possible to install an air diffuser below the floating filter layer (underneath the anaerobic floor) to diffuse air and promote cleaning only when cleaning the floating filter layer. [Example] An example of the present invention will be described based on FIG. 1.
is a tank body, and the upper part of the tank contains foamed polypropylene, foamed polystyrene, wood chips, and pumice. A flotation filter material layer 2 is provided, which is filled with a flotation material such as glass micro balloons that floats on water and whose specific gravity is less than 1.0. Although it prevents outflow, when using a floating material with a specific gravity close to 1.0, the support member 3 is not necessarily required because the rate of exposure to the water surface is small.
浮上濾材層２内の中間部には、空気その他の酸素含有ガ
スの散気装置４が配備され、処理中に酸素含有ガスを散
気してその上方の浮上濾材層２を好気性状態に保ち、硝
化菌生物膜を優占種として発達せしめる好気性が材部２
−１にし、浮上濾材層２の洗浄時には散気量を増加して
浮上濾材層２の攪乱を行うことができるようになってい
る。A diffuser 4 for air or other oxygen-containing gas is installed in the middle of the floating filter layer 2, and diffuses the oxygen-containing gas during processing to keep the floating filter layer 2 above it in an aerobic state. , the aerobic nature that causes nitrifying bacteria biofilm to develop as the dominant species is material 2.
-1, the floating filter layer 2 can be disturbed by increasing the amount of air diffused when cleaning the floating filter layer 2.
また、散気装置４の下方の浮上濾材層２は、処理中に嫌
気性状態が保たれ、脱窒素菌生物膜を優占種として発達
せしめる嫌気性が床部２−２となっている。Further, the floating filter layer 2 below the air diffuser 4 is maintained in an anaerobic state during the treatment, and the floor portion 2-2 is anaerobic, allowing denitrifying bacteria biofilm to develop as the dominant species.
槽内の浮上濾材層２より下方部は沈殿部５で、この沈殿
部５内に凝集剤注入管６が連結された原水流入管７に連
なるフィードウェル８を設け、沈殿部５内底部には、駆
動装置９により回転する回転軸１０の下端に連結された
レーキ１）が設けられている。The part below the floating filter layer 2 in the tank is a sedimentation part 5. A feedwell 8 connected to a raw water inflow pipe 7 to which a flocculant injection pipe 6 is connected is provided in the sedimentation part 5. , a rake 1) connected to the lower end of a rotating shaft 10 rotated by a drive device 9 is provided.
なお、図示例のように、散気装置４を沈殿部５のレーキ
１）を回転させる回転軸ｌＯと共に回転可能にしておく
と、酸素含有ガスを好気性炉床部２−１の水平断面部に
対して均等に分配することがでるので好都合である。こ
の場合、回転軸１０を中空にしておき、酸素含存ガスの
導入管として兼用するのが好適である。Note that, as shown in the illustrated example, if the aeration device 4 is made rotatable together with the rotating shaft lO that rotates the rake 1) of the settling section 5, the oxygen-containing gas is transferred to the horizontal section of the aerobic hearth section 2-1. This is convenient because it can be distributed evenly. In this case, it is preferable that the rotating shaft 10 is made hollow and used also as an introduction pipe for the oxygen-containing gas.
図中、１２は槽底に連結された排泥管である。In the figure, 12 is a mud drainage pipe connected to the bottom of the tank.
さらに、槽体１の上部には、処理水の越流ロンダ−１３
が設けられて処理水流出管１４が連結され、この処理水
流出管１４は貯留槽１５を経て系外に導かれる一方、貯
留槽１５は循環配管１６によってポンブ１７及び弁１８
を介して浮上濾材層２の下部に設けられた分配管１９に
連なっている．また、ポンブ１７の吐出側を洗浄排水管
２ｏによって弁２ｌを介して沈殿部５内のフィードゥエ
ル８と連結し、浮上濾材層２の洗浄排水を越流ロンダ−
１３，貯留槽Ｉ５を経て、ボンプ１７によって洗浄排水
管２０からフィードゥエル８へ導くようにすることが好
ましく、洗浄排水管２ｏに高分子凝集剤注入管２２を連
結する。２３は返送管１６に連結された有機炭素源注入
管である。Furthermore, an overflow launder 13 for treated water is provided at the upper part of the tank body 1.
is provided and connected to a treated water outflow pipe 14, and this treated water outflow pipe 14 is led out of the system via a storage tank 15, while the storage tank 15 is connected to a pump 17 and a valve 18 by a circulation pipe 16.
It is connected to a distribution pipe 19 provided at the bottom of the floating filter layer 2 via the filter. In addition, the discharge side of the pump 17 is connected to the feedwell 8 in the settling section 5 by the washing drain pipe 2o via the valve 2l, and the washing waste water of the floating filter layer 2 is transferred to the overflow launder.
13. It is preferable to lead the water from the cleaning drain pipe 20 to the feed well 8 via the storage tank I5 by means of a pump 17, and connect the polymer flocculant injection pipe 22 to the cleaning drain pipe 2o. 23 is an organic carbon source injection pipe connected to the return pipe 16.
また、浮上濾材層２の洗浄を促進させるために、浮上ヂ
材層２の嫌気性が床部２−２の下部に、洗浄時のみに空
気を散気する散気装置（図示せず）を設けることも好ま
しい態様である。In order to promote cleaning of the floating filter layer 2, the anaerobic surface of the floating filter layer 2 is provided with an aeration device (not shown) at the bottom of the floor section 2-2 that diffuses air only during cleaning. It is also a preferable embodiment to provide one.
以上述べたように、本発明によれば、次のような顕著な
効果を得ることできる。As described above, according to the present invention, the following remarkable effects can be obtained.
■ 単一槽により、沈殿分離．枦過．脱窒素，ＢＯＯ除
去，リン除去及び決材層洗浄排水の処理という６つの機
能を効果的に遂行できる。従って、従来の活性汚泥法に
おけるエアレーションタンク，最終沈殿池．？ｆｉ過池
を不要にし、著しい省スペース，建設費低減，水質の向
上，処理水質の安定化、及びメンテナンス性の向上が達
成される。■ Sedimentation separation using a single tank. Too much. It can effectively perform six functions: denitrification, BOO removal, phosphorus removal, and treatment of wastewater from cleaning the final material layer. Therefore, the aeration tank and final settling tank in the conventional activated sludge method. ? This eliminates the need for a filter pond, resulting in significant space savings, reduced construction costs, improved water quality, stabilized treated water quality, and improved maintainability.
■ 従来の生物が床法において、原水ＳＳが多い場合に
不可欠であった、前段の沈殿池が不要である。■ In the conventional biological bed method, there is no need for a settling tank at the front stage, which was essential when there was a large amount of raw water SS.
■ 濾材層の洗浄用に清澄処理水を消費する必要がない
ので、処理水生産率が高い。■ Since there is no need to consume clarified treated water for cleaning the filter media layer, the production rate of treated water is high.
■ Ｊ材層洗浄時の洗浄排水の処理に、別個の沈殿池を
必要としない。■ A separate sedimentation tank is not required to treat cleaning wastewater when cleaning the J material layer.
■ 好気性炉床部へのエアレーションに伴う水流の乱れ
が沈殿部に波及しないので、沈殿効果が阻害されない。■ The turbulence of water flow caused by aeration in the aerobic hearth area does not spread to the sedimentation area, so the sedimentation effect is not inhibited.
■ 原水ＳＳの除去効率が優れており、安定してＳＳ１
０ｑ／ｊ！以下の清澄処理水が得られ、原水流量変動時
にもＳＳ除去効果がほとんど悪化しない。■ Excellent raw water SS removal efficiency and stable SS1
0q/j! The following clarified treated water is obtained, and the SS removal effect hardly deteriorates even when the raw water flow rate fluctuates.
■ 装置の水面から清澄処理水が泉のように湧出するの
が見えるようにし、美観的に優れたちのにすることがで
きる。■ The clarified treated water can be seen gushing out from the water surface of the device like a spring, making it aesthetically pleasing.
第１図は本発明の一実施例を示す縦断面図である。
１・・・槽体、２・・・浮上濾材層、２−１・・・好気
性炉床部、２−２・・・嫌気性が床部、３・・・支持部
材、４・・・散気装置、５・・・沈殿部、６・・・凝集
剤注入管、７・・・原水流入管、８・・・フィードウェ
ル、９・・・駆動装置、１０・・・回転軸、１）・・・
レーキ、１３・・・越流ロンダ、１４・・・処理水流出
管、１５・・・貯留槽、１６・・・循環配管、１９・・
・分配管、２０・・・洗浄排水管、２２・・・高分子凝
集剤注入管、
入管。
２３・・・有ｉ炭素源注
特許出廓人FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Tank body, 2... Floating filter medium layer, 2-1... Aerobic hearth part, 2-2... Anaerobic floor part, 3... Support member, 4... Aeration device, 5... Sedimentation part, 6... Coagulant injection pipe, 7... Raw water inflow pipe, 8... Feedwell, 9... Drive device, 10... Rotating shaft, 1 )...
Rake, 13... Overflow rhonda, 14... Treated water outflow pipe, 15... Storage tank, 16... Circulation piping, 19...
・Distribution pipe, 20...Washing drain pipe, 22...Polymer flocculant injection pipe, Inlet pipe. 23... Existing carbon source patent distributor
Claims (1)
層内の中間部に酸素含有ガスの散気装置を配備し、浮上
濾材層より下方部を沈殿部とし、該沈殿部に原水流入部
を設け、さらに槽上部に処理水流出部を設けると共に、
処理水流出部から流出する処理水の一部を前記浮上濾材
層下部へ循環する循環路を設けたことを特徴とする生物
学的脱窒素装置。(1) A floating filter medium layer is held in the upper part of the tank, an oxygen-containing gas diffuser is provided in the middle part of the floating filter medium layer, and a part below the floating filter medium layer is defined as a settling part. A raw water inlet is provided at the top of the tank, and a treated water outlet is provided at the top of the tank.
A biological denitrification device characterized in that a circulation path is provided for circulating a part of the treated water flowing out from the treated water outflow section to the lower part of the floating filter layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011950A JPH03217296A (en) | 1990-01-23 | 1990-01-23 | Biological denitrifying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011950A JPH03217296A (en) | 1990-01-23 | 1990-01-23 | Biological denitrifying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03217296A true JPH03217296A (en) | 1991-09-25 |
| JPH0518639B2 JPH0518639B2 (en) | 1993-03-12 |
Family
ID=11791916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2011950A Granted JPH03217296A (en) | 1990-01-23 | 1990-01-23 | Biological denitrifying device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03217296A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0623391A (en) * | 1992-03-26 | 1994-02-01 | Ebara Infilco Co Ltd | Ascending flow type biological treatment apparatus |
| JP2000296398A (en) * | 1999-04-13 | 2000-10-24 | Nippon Steel Corp | Equipment for removal treatment of nitrogen in wastewater |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS647920A (en) * | 1987-06-29 | 1989-01-11 | Mini Public Works | Solid-liquid separation device |
-
1990
- 1990-01-23 JP JP2011950A patent/JPH03217296A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS647920A (en) * | 1987-06-29 | 1989-01-11 | Mini Public Works | Solid-liquid separation device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0623391A (en) * | 1992-03-26 | 1994-02-01 | Ebara Infilco Co Ltd | Ascending flow type biological treatment apparatus |
| JP2000296398A (en) * | 1999-04-13 | 2000-10-24 | Nippon Steel Corp | Equipment for removal treatment of nitrogen in wastewater |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0518639B2 (en) | 1993-03-12 |
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| LAPS | Cancellation because of no payment of annual fees |