JPS6231999B2 - - Google Patents
Info
- Publication number
- JPS6231999B2 JPS6231999B2 JP13310085A JP13310085A JPS6231999B2 JP S6231999 B2 JPS6231999 B2 JP S6231999B2 JP 13310085 A JP13310085 A JP 13310085A JP 13310085 A JP13310085 A JP 13310085A JP S6231999 B2 JPS6231999 B2 JP S6231999B2
- Authority
- JP
- Japan
- Prior art keywords
- denitrification
- nitrification
- pump
- section
- tank
- 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
Links
- 238000005273 aeration Methods 0.000 claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 description 20
- 238000000034 method Methods 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000001546 nitrifying effect Effects 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 239000010800 human waste Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000802 nitrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、し尿、下水などの有機性廃水を脱窒
素工程と硝化工程を経た生物学的脱窒素処理によ
つて浄化する装置に関し、特に循環式生物学的脱
窒素装置の改良に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an apparatus for purifying organic wastewater such as human waste and sewage through biological denitrification treatment through a denitrification process and a nitrification process. This invention relates to improvement of a circulating biological denitrification device.
従来の硝化液循環式生物学的脱窒素プロセスの
主要部である脱窒素工程と硝化工程では第２図に
示したように、脱窒素槽１′から硝化槽２′へ脱窒
素液を連通配管３′で自然流過で流入させ、硝化
液を脱窒素槽１′へ循環ポンプ４で強制的に循環
させている。そして前記硝化槽２′内のエアレー
シヨンは、循環ポンプ４とは別個のブロワー４′
などによつて空気を液中に散気させることによつ
て行われる。
In the denitrification and nitrification processes, which are the main parts of the conventional biological denitrification process using nitrification fluid circulation, as shown in Figure 2, denitrification fluid is communicated through piping from denitrification tank 1' to nitrification tank 2'. 3', the nitrified liquid is forced to flow into the denitrification tank 1' by a circulation pump 4. The aeration inside the nitrification tank 2' is controlled by a blower 4' separate from the circulation pump 4.
This is done by diffusing air into the liquid using a method such as a method.
したがつて、従来プロセスでは、硝化液の循環
とエアレーシヨンを全く別個の機能として把握し
ており、循環ポンプをエアレーシヨンの目的にも
利用して省エネルギー化をはかろうとする概念は
存在していなかつた問題点がある。
Therefore, in the conventional process, circulation of nitrifying liquid and aeration were considered to be completely separate functions, and there was no concept of using the circulation pump for the purpose of aeration to save energy. There is a problem.
また、従来プロセスでは循環ポンプによる硝化
液の脱室素槽への循環量を増大した場合、脱窒素
槽内を所望の嫌気性状態に維持できなくなり、脱
窒素処理効率が著しく低下してしまう問題点があ
つた。 In addition, in the conventional process, when the circulation amount of nitrification liquid to the denitrification tank by the circulation pump is increased, it becomes impossible to maintain the desired anaerobic state inside the denitrification tank, and the denitrification treatment efficiency decreases significantly. The dot was hot.
さらに、従来より脱窒素槽への硝化液循環量は
多ければ多いほど脱窒素率が向上することが、理
論的、実験的に確認されていたが、現実には、硝
化液循環ポンプの動力費および設備費からみて、
原水流量に対し、およそ６倍以上の循環比にする
ことは得策でないと認められ現実にそのように実
施されているので処理作業性を大幅に高めること
は不可能である。 Furthermore, it has been theoretically and experimentally confirmed that the greater the amount of nitrification fluid circulated into the denitrification tank, the higher the denitrification rate. In terms of and equipment costs,
It is recognized that it is not a good idea to increase the circulation ratio to more than 6 times the flow rate of raw water, and this is actually practiced, so it is impossible to significantly improve treatment efficiency.
本発明は、これら従来プロセスの問題点を適確
に除去し、省エネルギー化対策に有効な生物学的
脱窒素装置を提供することを目的としている。 The present invention aims to provide a biological denitrification device that appropriately eliminates the problems of these conventional processes and is effective as an energy saving measure.
本発明は、槽内に連通流路を有する区画壁を配
備し、槽上部に硝化部、槽下部に脱窒素部を区画
形成せしめると共に両部を連通させ、前記脱窒素
部および硝化部を１台のポンプの吸込管から分岐
される分岐吸込管にそれぞれ接続し、かつ該ポン
プの吐出管を前記硝化部に連通せしめ前記分岐吸
込管、ポンプ及び吐出管により循環流路を形成
し、さらに該循環流路に酸素含有ガス導入による
エアレーシヨン機構を設けたことを特徴とする廃
水の生物学的脱窒素装置である。
In the present invention, a partition wall having a communication channel is provided in the tank, a nitrification section is formed in the upper part of the tank, and a denitrification part is formed in the lower part of the tank, and both parts are communicated with each other, so that the denitrification part and the nitrification part are connected to one another. The branch suction pipes are connected to branch suction pipes branched from the suction pipes of the pumps, and the discharge pipes of the pumps are connected to the nitrification section, so that the branch suction pipes, the pumps, and the discharge pipes form a circulation flow path. This is a biological denitrification device for wastewater characterized by providing an aeration mechanism by introducing oxygen-containing gas into the circulation channel.
即ち、本発明は、液循環ポンプを単に液の循環
だけでなくエアレーシヨンにも利用できるような
構成にしたため省エネルギーが可能になり、しか
も、消化液循環量を従来法より大幅に増加させる
ことを、トータルの動力費を増加させることなし
に可能にすることによつて、脱窒素効率を格段に
向上させることができる装置としたことを特徴と
している。 That is, the present invention has a structure in which the liquid circulation pump can be used not only for liquid circulation but also for aeration, making it possible to save energy, and furthermore, it is possible to significantly increase the amount of digestive liquid circulation compared to the conventional method. The device is characterized by being able to significantly improve denitrification efficiency without increasing the total power cost.
本発明を実施例につき、第１図を参照しながら
説明すると、原水流入部８と処理水流出部９とを
備えた生物学的脱窒素処理装置において、処理槽
１０の高さ方向中間部に区画壁１１を配備して処
理槽１０の上部を硝化部２、下方部を脱窒素部１
とすると共に、これら両部を連通流路３により連
通させ、これら脱窒素部１、硝化部２をそれぞれ
分岐吸込管５，５′を介して１台のポンプ４の吸
引側に接続し、該ポンプ４の吐出管６を立ち上げ
硝化部２の液面上又は液面下に開口端を終わらせ
る。 The present invention will be described with reference to FIG. 1 with reference to FIG. A partition wall 11 is provided, and the upper part of the treatment tank 10 is a nitrification part 2, and the lower part is a denitrification part 1.
The denitrification section 1 and the nitrification section 2 are connected to the suction side of one pump 4 via branch suction pipes 5 and 5', respectively, and these two sections are communicated through a communication channel 3. The discharge pipe 6 of the pump 4 is started up and its open end is placed above or below the liquid level of the nitrification unit 2.
このようにして前記吸込管５，５′とポンプ４
と吐出管６により循環流路を形成し、これらの吐
出管６、吸込管５，５′、あるいはポンプ４内の
いずれか若しくはいずれにも、空気などの酸素含
有ガス導入管７を連結してある。 In this way, the suction pipes 5, 5' and the pump 4
A circulation flow path is formed by the discharge pipe 6 and the discharge pipe 6, and an oxygen-containing gas introduction pipe 7 such as air is connected to either or both of the discharge pipe 6, the suction pipes 5 and 5', or the inside of the pump 4. be.
また、吐出管６の吐出端は硝化部液面下に連設
してもよいが図のように、水面より高い位置から
ポンプ吐出水流の落下によるエアレーシヨンを併
用させるエアレーシヨン構成とするのが合理的で
ある。 Although the discharge end of the discharge pipe 6 may be connected below the liquid level of the nitrification unit, it is reasonable to use an aeration structure in which aeration is also performed by the drop of the pump discharge water flow from a position higher than the water surface, as shown in the figure. It is.
なお、酸素含有ガスの供給には、エゼクターの
水流による吸引、ブロワーによる供給など任意の
手段を使用し得ることは言うまでもないが、いず
れにしてもポンプ４を液循環とエアレーシヨンの
両機能を遂行できるように構成した形態で用いら
れるようにしてある。 It goes without saying that the oxygen-containing gas can be supplied by any means such as suction by water flow from an ejector or supply by a blower, but in any case, the pump 4 can perform both liquid circulation and aeration functions. It is designed to be used in a form configured as follows.
しかして、原水流入部８から、し尿などのアン
モニア性−Ｎを含む有機性廃水が脱窒素部１内に
流入し、硝化部２で生成したNOx−Ｎが原水中の
BODを有機炭素源として、脱窒素菌によつてN2
ガスに還元されたのち、ポンプ４によつて強制的
に硝化部２に移送される。この硝化部２から連通
流路３を通つて脱窒素部１にリサイクルされてく
る硝化液流量は、ポンプ４によつて強制的に硝化
部２に移送された脱窒素液の流量に等しい。 Organic wastewater containing ammoniacal -N such as human waste flows into the denitrification section 1 from the raw water inlet section 8, and NO x -N generated in the nitrification section 2 is absorbed into the raw water.
Using BOD as an organic carbon source, N2 is produced by denitrifying bacteria.
After being reduced to gas, it is forcibly transferred to the nitrification section 2 by the pump 4. The flow rate of the nitrification liquid recycled from the nitrification unit 2 to the denitrification unit 1 through the communication channel 3 is equal to the flow rate of the denitrification liquid forcibly transferred to the nitrification unit 2 by the pump 4.
次に前記硝化部２に強制的に移送された脱窒素
液中のNH4−Ｎは硝化菌および酸素によつてNO2
−Ｎ又はNO3−ＮなどのNOx−Ｎに酸化されたの
ち、前記の如く連通流路３を自然流過で脱窒素部
１にリサイクルされてゆく。 Next, NH 4 -N in the denitrifying solution forcibly transferred to the nitrification section 2 is converted into NO 2 by nitrifying bacteria and oxygen.
After being oxidized to NO x -N such as -N or NO 3 -N, it is recycled to the denitrification section 1 by natural flow through the communication channel 3 as described above.
ここで前記ポンプ４は脱窒素液とともに硝化液
をも吸引する点が肝要である。もし、脱窒素液の
みを吸引するだけであると、硝化部から脱窒素部
への硝化液のリサイクル流量が過大になり脱窒素
部への溶存酸素持込量が過大になる結果、脱窒素
部が嫌気的雰囲気に維持できない場合が起る。 Here, it is important that the pump 4 sucks in the nitrifying solution as well as the denitrifying solution. If only the denitrification solution is sucked in, the flow rate of the nitrification solution from the nitrification section to the denitrification section will be excessive, resulting in an excessive amount of dissolved oxygen brought into the denitrification section. However, there are cases where it is not possible to maintain an anaerobic atmosphere.
従つて本発明は、この好ましくない現象を防止
するために硝化部２からもポンプ４によつて液を
吸引し、硝化部２内で液を自己循環させるととも
に脱窒素部１内の液もポンプ４によつて吸引させ
ているのである。 Therefore, in the present invention, in order to prevent this undesirable phenomenon, the liquid is sucked from the nitrification part 2 by the pump 4, and the liquid is self-circulated in the nitrification part 2, and the liquid in the denitrification part 1 is also pumped. 4 causes suction.
また本発明では、硝化液の脱窒素部への流過は
下向流で行われるので、硝化液が気泡状の酸素含
有ガスを同伴して脱窒素部内に持ち込むおそれは
殆どない。 In addition, in the present invention, since the nitrifying solution passes through the denitrifying section in a downward flow, there is almost no possibility that the nitrating solution will bring along bubbles of oxygen-containing gas into the denitrifying section.
かくして前記硝化部内の充分なエアレーシヨン
作用と脱窒素部への硝化液の過大なリサイクルの
防止という両者の目的を効果的に達成できるので
ある。 In this way, it is possible to effectively achieve both the objectives of sufficient aeration within the nitrification section and prevention of excessive recycling of nitrification liquid to the denitrification section.
本発明は、従来プロセスのように硝化液の循環
とエアレーシヨンを全く別々な機能として把握し
ないで、循環用のポンプにエアレーシヨン機能を
付与せしめたので、循環ポンプの所要動力をエア
レーシヨン動力にも利用でき、この結果従来プロ
セスに必要な動力を半減することができると共に
従来法で必要とした空気ブロワーなどの循環ポン
プとは別個の曝気設備が不要となり、コンパクト
な設備で効率よく脱窒素硝化処理が可能となり、
しかも、エアレーシヨンに必要な動力のみで自
ら、硝化液の脱窒素部へのリサイクル量を従来プ
ロセスと同等以上にできるので、省エネルギー化
が適確に達成できることとなり、さらにポンプを
利用して硝化部のエアレーシヨンを行うので硝化
部へ必要な酸素を供給する動力のみで必然的に充
分な硝化液循環流量が得られ、従来プロセスと同
等のエネルギーを使用してもよい場合は、硝化液
のリサイクル量を従来プロセスの数10倍以上にす
ることが容易であるので、脱窒素効率が向上する
し、運転経費の増加を招かないし、循環比を圧倒
的に高く設定できるため脱窒素率が従来法に比べ
て大幅に向上でき、運転管理も容易で安定した処
理と作業性向上に寄与するところ大である。 In the present invention, unlike conventional processes, circulation of nitrifying liquid and aeration are not treated as completely separate functions, but the circulation pump is given an aeration function, so the power required for the circulation pump can also be used for the aeration power. As a result, the power required for the conventional process can be halved, and separate aeration equipment such as an air blower or circulation pump required in the conventional method is no longer required, allowing efficient denitrification and nitrification processing with compact equipment. Then,
Furthermore, the amount of nitrification liquid recycled to the denitrification section can be increased by itself using only the power required for aeration, which is equal to or greater than the conventional process, making it possible to accurately achieve energy savings. Since aeration is performed, sufficient nitrification liquid circulation flow rate can be obtained only by the power supplying the necessary oxygen to the nitrification section, and if it is acceptable to use the same energy as the conventional process, the amount of nitrification liquid recycled can be reduced. Since it is easy to increase the denitrification efficiency to more than ten times that of the conventional process, the denitrification efficiency improves, there is no increase in operating costs, and the circulation ratio can be set to an overwhelmingly high level, so the denitrification rate is lower than that of the conventional method. It can be significantly improved compared to other systems, and operation management is easy, which greatly contributes to stable processing and improved workability.
また、本発明では単一槽に区画壁を設けて硝化
部を上部に、脱窒素部を下部に形成すると共に、
この区画壁により前記連通流路３を形成したもの
であるから、構造簡単であり、設置面積の大幅な
低減が可能である。 In addition, in the present invention, a partition wall is provided in a single tank to form a nitrification section in the upper part and a denitrification part in the lower part.
Since the communication channel 3 is formed by this partition wall, the structure is simple and the installation area can be significantly reduced.
第１図は本発明の実施例におけるフローシー
ト、第２図は従来例のフローシートである。
１……脱窒素部、２……硝化部、３……連通流
路、４……ポンプ、５，５′……吸込管、６……
吐出管、７……酸素含有ガス導入管、８……原水
流入部、９……処理水流出部、１０……処理槽、
１１……区画壁。
FIG. 1 is a flow sheet in an embodiment of the present invention, and FIG. 2 is a flow sheet in a conventional example. 1... Denitrification section, 2... Nitrification section, 3... Communication channel, 4... Pump, 5, 5'... Suction pipe, 6...
Discharge pipe, 7... Oxygen-containing gas introduction pipe, 8... Raw water inlet, 9... Treated water outlet, 10... Treatment tank,
11...Division wall.
Claims (1)
上部に硝化部、槽下部に脱窒素部を区画形成せし
めると共に両部を連通させ、前記脱窒素部および
硝化部を１台のポンプの吸込管から分岐される分
岐吸込管にそれぞれ接続し、かつ該ポンプの吐出
管を前記硝化部に連通せしめ前記分岐吸込管、ポ
ンプ及び吐出管により循環流路を形成し、さらに
該循環流路に酸素含有ガス導入によるエアレーシ
ヨン機構を設けたことを特徴とする廃水の生物学
的脱窒素装置。1 A partition wall having a communication flow path is provided in the tank, a nitrification section is formed in the upper part of the tank, and a denitrification part is formed in the lower part of the tank, and both parts are communicated, and the denitrification part and the nitrification part are connected to each other by one pump. The branch suction pipes are connected to branch suction pipes branched from the suction pipe of the pump, and the discharge pipe of the pump is connected to the nitrification section, and the branch suction pipe, the pump, and the discharge pipe form a circulation flow path, and the circulation flow path A biological denitrification device for wastewater, characterized in that it is equipped with an aeration mechanism by introducing oxygen-containing gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13310085A JPS6118499A (en) | 1985-06-20 | 1985-06-20 | Biological denitrification apparatus of waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13310085A JPS6118499A (en) | 1985-06-20 | 1985-06-20 | Biological denitrification apparatus of waste water |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1524279A Division JPS55106598A (en) | 1979-02-13 | 1979-02-13 | Device for biologically denitrifying waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6118499A JPS6118499A (en) | 1986-01-27 |
| JPS6231999B2 true JPS6231999B2 (en) | 1987-07-11 |
Family
ID=15096821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13310085A Granted JPS6118499A (en) | 1985-06-20 | 1985-06-20 | Biological denitrification apparatus of waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6118499A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3183162B2 (en) * | 1996-04-25 | 2001-07-03 | ダイキン工業株式会社 | Fluid purification device |
-
1985
- 1985-06-20 JP JP13310085A patent/JPS6118499A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6118499A (en) | 1986-01-27 |
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