JPS62294498A - Biological denitrification device for waste water - Google Patents
Biological denitrification device for waste waterInfo
- Publication number
- JPS62294498A JPS62294498A JP9201387A JP9201387A JPS62294498A JP S62294498 A JPS62294498 A JP S62294498A JP 9201387 A JP9201387 A JP 9201387A JP 9201387 A JP9201387 A JP 9201387A JP S62294498 A JPS62294498 A JP S62294498A
- Authority
- JP
- Japan
- Prior art keywords
- denitrification
- nitrification
- section
- tank
- liquid
- 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
- 239000002351 wastewater Substances 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000004891 communication Methods 0.000 claims abstract description 7
- 238000005273 aeration Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 241000894006 Bacteria Species 0.000 abstract description 4
- 238000006396 nitration reaction Methods 0.000 abstract 4
- 238000005276 aerator Methods 0.000 abstract 2
- 235000009984 Pterocarpus indicus Nutrition 0.000 description 13
- 241000533793 Tipuana tipu Species 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 239000000243 solution Substances 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- 230000001546 nitrifying effect Effects 0.000 description 5
- 239000010800 human waste Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000852 hydrogen donor Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
〔産業上の利用分野〕
本発明は、し尿などの有機性廃水におりる生物学的脱窒
素装置に関し、特に公知の硝化液循環生物学的脱窒素装
置の改良に関するものである。Detailed Description of the Invention 3. Detailed Description of the Invention [Industrial Application Field] The present invention relates to a biological denitrification device for organic wastewater such as human waste, and in particular to a biological denitrification device for organic wastewater such as human waste, and in particular, This paper relates to improvements to denitrification equipment.
Ｃ従来の技術と発明が解決しようとする問題点〕従来の
硝化液循環生物学的膜窒素プロセスのｔ要部である脱窒
素工程と硝化工程では第３図に示したように、原液流入
部８を有する脱窒素槽１から処理水流出部９を有する硝
化槽２へ脱窒素液を連通配管３で自然流入させ硝化液を
脱窒素槽１へ硝化液循環ポンプ４で循環させているが、
硝化液循環ポンプ４は、脱窒素槽１に後続する硝化槽２
から硝化液を吸い込み、脱窒素槽１に吐出させているし
、また硝化槽２内のエアレーションは、硝化液循環ポン
プ４とは別個のブロワ−４′などによって、空気を散気
管などから散気させるごとによって行っていると共に、
前記脱窒素Ｔ程流出液は自然流過て硝化工程に流入して
いる。C. Prior art and problems to be solved by the invention] In the denitrification process and nitrification process, which are the main parts of the conventional nitrification liquid circulation biological membrane nitrogen process, as shown in Fig. 3, the raw solution inlet is The denitrifying liquid is naturally flowed from the denitrifying tank 1 having a nitrifying tank 8 into the nitrifying tank 2 having a treated water outlet 9 through a communication pipe 3, and the nitrifying liquid is circulated to the denitrifying tank 1 by a nitrifying liquid circulation pump 4.
The nitrification liquid circulation pump 4 is a nitrification tank 2 that follows the denitrification tank 1.
The nitrification liquid is sucked in from the tank and discharged into the denitrification tank 1, and the aeration in the nitrification tank 2 is carried out by using a blower 4', etc., which is separate from the nitrification liquid circulation pump 4, to diffuse air from an aeration pipe or the like. While doing so,
During the denitrification process, the effluent flows through the nitrification process by gravity.
そして従来より、脱窒紫檀１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は理論的・実験的に
確認されていたが、現実には、硝化液循環ポンプ４の動
力費および設備費から見て、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ことがよく知ら
れている。It has been theoretically and experimentally confirmed that the denitrification rate improves as the amount of nitrification liquid circulated to the denitrification rosewood 1 increases, but in reality, the power of the nitrification liquid circulation pump 4 is In terms of cost and equipment cost, approximately 6
It is well known that it is not a good idea to increase the circulation ratio by more than double.
しかも、従来の方法は前述の如く、硝化液を硝化液循環
ポンプ４によって、脱窒紫檀１内にリサイクルしており
、かつ、脱窒紫檀１は嫌気的状態に維持しなければなら
ないので、循環ポンプ吐出液を脱窒紫檀１の水面に落下
させるなどの手段によって、循環ポンプにエアレーショ
ンの機能を同時に付与せしめることは、硝化液循環生物
学的膜窒素プロセスの技術目的に全く矛盾するため、採
用不可能なことであった。Moreover, as mentioned above, in the conventional method, the nitrification liquid is recycled into the denitrifying rosewood 1 by the nitrification liquid circulation pump 4, and since the denitrification rosewood 1 must be maintained in an anaerobic state, the nitrification liquid is recycled. It was not adopted because it would be completely inconsistent with the technical purpose of the nitrification liquid circulation biological membrane nitrogen process to simultaneously give the circulation pump the function of aeration by means such as dropping the pump discharge liquid onto the water surface of the denitrifying rosewood 1. It was impossible.
本発明は、この従来の硝化液循環ポンププロセスとは全
く逆の発想によって、硝化槽２のブロワ−などによるエ
アレーションを不要にし、かつ脱窒素率を飛躍的に向上
できる新規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 is based on a completely opposite concept to the conventional nitrification liquid circulation pump process, and is a novel biological denitrification method that eliminates the need for aeration using a blower or the like in the nitrification tank 2 and dramatically improves the denitrification rate. The purpose is to provide equipment.
また本発明の他の目的は、従来のこれら問題点を克服し
、硝化液循環流量を大幅に向上させることを、トータル
の運転経費を従来法より増加させることなしに可能にす
ることによって、脱窒素効率を格段に向上させることが
できる装置とすることにある。Another object of the present invention is to overcome these conventional problems and significantly improve the nitrification liquid circulation flow rate without increasing the total operating cost compared to the conventional method. The objective is to provide a device that can significantly improve nitrogen efficiency.
本発明は、原液流入部を有する脱窒素部と処理水流出部
を有する硝化部とが区画連通された硝化液循環生物学的
脱窒素装置において、前記脱窒素部と硝化部とを連通路
にて連通せしめ、前記硝化部内に水中ポンプに酸素含有
ガスを導く給気管を連接した水中ポンプ兼曝気装置を配
備し、該水中ポンプ兼曝気装置の液の吸込部と前記脱窒
素部とを移送路にて連通させたことを特徴とする廃水の
生物学的脱窒素装置である。The present invention provides a nitrification solution circulation biological denitrification device in which a denitrification section having a raw solution inflow section and a nitrification section having a treated water outflow section are communicated with each other, in which the denitrification section and the nitrification section are connected in a communication path. A submersible pump and aeration device is provided in the nitrification section, which is connected to an air supply pipe that leads oxygen-containing gas to the submersible pump, and a transfer path is provided between the liquid suction section of the submersible pump and aeration device and the denitrification section. This is a biological denitrification device for wastewater, which is characterized in that it communicates with
本発明を実施例につき第１図及び第２図を参照して説明
すると、第１図においては、原液流入部８を有する脱窒
紫檀１と処理水流出部９を有する硝化槽２とを連通路用
の配管３で連通し、硝化槽２内には液と共に空気を吸引
して吐出す水中ポンプ兼曝気装置２４を配備し、脱窒紫
檀１の好ましくは底部に移送路用の吸込管２５を連通し
、且つ吐出部２６を硝化槽２内に開口しである。この水
中ポンプ兼曝気装置２４にはモータ２２及び給気管２３
が連接されている。Embodiments of the present invention will be described with reference to FIGS. 1 and 2. In FIG. 1, a denitrification rosewood 1 having a raw solution inlet 8 and a nitrification tank 2 having a treated water outlet 9 are connected. A submersible pump and aeration device 24 is installed in the nitrification tank 2 to suck and discharge air together with the liquid, and a suction pipe 25 for a transfer path is installed preferably at the bottom of the denitrifying rosewood 1. The discharge part 26 is opened into the nitrification tank 2. This submersible pump and aeration device 24 includes a motor 22 and an air supply pipe 23.
are connected.
第２図例では第１図例での連通路用の配管３を脱窒紫檀
１の上部と硝化槽２の下部に連結したもので必要に応じ
各槽壁を利用した連通流路を形成した結合状態下の槽形
態とすることもできる。In the example in Figure 2, the pipe 3 for the communication passage in the example in Figure 1 is connected to the upper part of the denitrification rosewood 1 and the lower part of the nitrification tank 2, forming a communication passage using the walls of each tank as necessary. It can also be in the form of a tank under bonded conditions.
しかして、脱窒紫檀ｌから水中ポンプ兼曝気装置２４に
よって吸込管２５を経て強制的に移送された脱窒紫檀流
出液は、硝化槽２内に吐出されると同時に給気管２３か
ら圧送又は吸引され吐出された空気或いは純酸素を含む
ガスによって、脱窒素流出液中のＮｌ＋４−Ｎ及び微量
の残留ＢＯＤは、硝化槽２内で硝化菌、ＢＯＤ資化菌に
よってＮ０Ｘ−Ｎに転換され、ＢＯＤも除去される。ま
た、硝化槽２内液の大部分は、脱窒素液が水中ポンプ兼
曝気装置２４によって強制的に移送される作用を利用し
て配管３を経由して自然流過で脱窒紫檀ｌ内にリサイク
ルされ、嫌気的な条件下で原液中のＢＯＤ成分を水素供
与体として脱窒素菌の働きにより、ＮＯＸ、、ＮはＮ２
ガスへ還元されて放出される。Thus, the denitrified rosewood effluent, which is forcibly transferred from the denitrified rosewood 1 through the suction pipe 25 by the submersible pump and aeration device 24, is discharged into the nitrification tank 2 and at the same time is pumped or sucked from the air supply pipe 23. The Nl+4-N and trace amount of residual BOD in the denitrified effluent are converted to N0X-N by nitrifying bacteria and BOD-assimilating bacteria in the nitrification tank 2 by the air or pure oxygen-containing gas discharged. is also removed. In addition, most of the liquid in the nitrification tank 2 is transferred to the denitrification rosewood 1 by natural flow via the piping 3 using the effect that the denitrification liquid is forcibly transferred by the submersible pump and aeration device 24. Recycled, under anaerobic conditions, NOX, N are converted to N2 by the action of denitrifying bacteria using BOD components in the stock solution as hydrogen donors.
It is reduced to gas and released.
一方、硝化槽２の処理水流出部９からは脱窒素された処
理水の原液流入量に相当する量が流出し、図示しない固
液分離装置で処理され、分離された汚泥の一部は脱窒紫
檀１もしくは硝化槽２に返送される。On the other hand, from the treated water outflow part 9 of the nitrification tank 2, an amount equivalent to the inflow amount of the denitrified raw treated water flows out, and is treated with a solid-liquid separator (not shown), and a part of the separated sludge is removed. It is returned to Nitrosetan 1 or nitrification tank 2.
本発明は、ＮＨ４−Ｎを含む任意の廃水（下水、し尿、
産業廃水など）に適用可能であるが、とりわけ、高濃度
のＢＯＤとＮＨ４−Ｎを含むし尿のような高濃度有機性
廃水に対し、希釈水を用いることなく、しかも格段にコ
ンパクトな装置（滞留時間は脱窒紫檀が１日、硝化槽２
日）で、ＢＯＤとＴ−Ｎ除去率９９％という従来の生物
学的膜窒素法では実現不可能な高い値が安定して得られ
る。The present invention can be applied to any wastewater containing NH4-N (sewage, human waste,
In particular, it can be applied to highly concentrated organic wastewater such as human waste containing high concentrations of BOD and NH4-N. The time is 1 day for denitrification rosewood and 2 days for nitrification tank.
(day), a BOD and TN removal rate of 99%, a high value that cannot be achieved with the conventional biological membrane nitrogen method, can be stably obtained.
即ち、本発明では脱窒素槽内液を、ポンプによって硝化
槽に強制的に移行させると同時に曝気も行われ、且つ硝
化槽内液が脱窒素液の強制的移送の作用によって自然流
過で脱窒紫檀に流入することによって従来法で必要とし
た空気ブロワ−などの硝化液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←脱窒素
硝化処理が可能となり、しかも、従来法では硝化液循環
ポンプがエアレーションの機能をもっておらず、硝化液
の循環という単一の目的のみに使用されているため循環
比を６〜７倍以」二に増加させることは運転経費−に不
経済になるのに対し、本発明では脱窒素槽内液を移送す
るポンプにエアレーション機能を付与しているので、従
来法で必要とするエアレーション動力をそのポンプ動力
として使え、循環比を１００倍以上に設定しても、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
転管理も容易となる。That is, in the present invention, the liquid in the denitrification tank is forcibly transferred to the nitrification tank by a pump, and at the same time aeration is performed, and the liquid in the nitrification tank is denitrified by natural flow due to the action of forced transfer of the denitrification liquid. By flowing nitrogen into the rosewood, there is no need for separate aeration equipment such as an air blower or other nitrified liquid circulation pump that was required in the conventional method, making it possible to efficiently denitrify and nitrify with compact equipment. According to the law, the nitrification liquid circulation pump does not have an aeration function and is used only for the single purpose of circulating nitrification liquid, so increasing the circulation ratio by 6 to 7 times or more would be undesirable in terms of operating costs. In contrast, in the present invention, the pump that transfers the liquid in the denitrification tank has an aeration function, so the aeration power required in the conventional method can be used as the pump power, increasing the circulation ratio by more than 100 times. Even if the method is set to 1, there is no increase in operating costs, and since the circulation ratio can be set to an overwhelmingly high denitrification rate, the denitrification rate can be greatly improved compared to conventional methods, and operation management is also easier.
以上述べたように本発明によれば、従来の硝化液循環生
物学的膜窒素とは全く逆の発想によって、硝化液の循環
比を飛躍的に増加させることができて脱窒素効率を格段
に向上させ、しかも運転経費の増加を招かず、運転管理
も容易となる等の極めて有益なる効果を生ずるものであ
る。As described above, according to the present invention, the circulation ratio of nitrification solution can be dramatically increased, and the denitrification efficiency can be significantly improved, using an idea completely opposite to the conventional nitrification solution circulation biological membrane nitrogen. Moreover, it does not cause an increase in operating costs, and produces extremely beneficial effects such as facilitating operation management.
第１図及び第２図は本発明の実施例を示す説明図、第３
図は従来例の説明図である。
■・・・脱窒紫檀、２・・・硝化槽、３・・・配管、４
・・・硝化液循環ポンプ、８・・・原液流入部、９・・
・処理水流出部、２２・・・モータ、２３・・・給気管
、２４・・・水中ポンプ兼曝気装置、２５・・・吸込管
、２６・・・吐出部。1 and 2 are explanatory diagrams showing embodiments of the present invention, and FIG.
The figure is an explanatory diagram of a conventional example. ■...Denitrification rosewood, 2...Nitrification tank, 3...Piping, 4
...Nitrification liquid circulation pump, 8...Natural solution inlet, 9...
- Treated water outflow part, 22... Motor, 23... Air supply pipe, 24... Submersible pump and aeration device, 25... Suction pipe, 26... Discharge part.
Claims (3)
する硝化部とが区画連通された硝化液循環生物学的脱窒
素装置において、前記脱窒素部と硝化部とを連通路にて
連通せしめ、前記硝化部内に水中ポンプに酸素含有ガス
を導く給気管を連接した水中ポンプ兼曝気装置を配備し
、該水中ポンプ兼曝気装置の液の吸込部と前記脱窒素部
とを移送路にて連通させたことを特徴とする廃水の生物
学的脱窒素装置。(1) In a nitrified solution circulation biological denitrification device in which a denitrification section having a raw solution inflow section and a nitrification section having a treated water outflow section are communicated with each other, the denitrification section and the nitrification section are connected through a communication passage. A submersible pump and aeration device is provided in which the submersible pump and aeration device are connected to each other, and an air supply pipe that leads oxygen-containing gas to the submersible pump is connected in the nitrification section, and the liquid suction section of the submersible pump and aeration device and the denitrification section are connected to a transfer path. A biological denitrification device for wastewater, characterized in that it is connected to
窒素部の下部と移送路にて連通させたものである特許請
求の範囲第１項記載の廃水の生物学的脱窒素装置。(2) The biological denitrification device for wastewater according to claim 1, wherein the liquid suction portion of the submersible pump and aeration device is communicated with the lower part of the denitrification portion through a transfer path.
部と硝化部下部とを、あるいは脱窒素部上部と硝化部上
部とを連通させたものである特許請求の範囲第１項又は
第２項記載の廃水の生物学的脱窒素装置。(3) The communication path between the denitrification section and the nitrification section is one in which the upper part of the denitrification part and the lower part of the nitrification part are communicated with each other, or the upper part of the denitrification part and the upper part of the nitrification part are communicated with each other. The biological denitrification device for wastewater according to item 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9201387A JPS62294498A (en) | 1987-04-16 | 1987-04-16 | Biological denitrification device for waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9201387A JPS62294498A (en) | 1987-04-16 | 1987-04-16 | Biological denitrification device for waste water |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11818278A Division JPS5544358A (en) | 1978-09-26 | 1978-09-26 | Method and apparatus for biological denitrification of waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62294498A true JPS62294498A (en) | 1987-12-21 |
| JPH0248319B2 JPH0248319B2 (en) | 1990-10-24 |
Family
ID=14042620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9201387A Granted JPS62294498A (en) | 1987-04-16 | 1987-04-16 | Biological denitrification device for waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62294498A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5298356A (en) * | 1976-02-12 | 1977-08-18 | Susumu Hashimoto | Method of and apparatus for treating waste water |
| JPS5544358A (en) * | 1978-09-26 | 1980-03-28 | Ebara Infilco Co Ltd | Method and apparatus for biological denitrification of waste water |
-
1987
- 1987-04-16 JP JP9201387A patent/JPS62294498A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5298356A (en) * | 1976-02-12 | 1977-08-18 | Susumu Hashimoto | Method of and apparatus for treating waste water |
| JPS5544358A (en) * | 1978-09-26 | 1980-03-28 | Ebara Infilco Co Ltd | Method and apparatus for biological denitrification of waste water |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0248319B2 (en) | 1990-10-24 |
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