JPH0248319B2 - - Google Patents
Info
- Publication number
- JPH0248319B2 JPH0248319B2 JP62092013A JP9201387A JPH0248319B2 JP H0248319 B2 JPH0248319 B2 JP H0248319B2 JP 62092013 A JP62092013 A JP 62092013A JP 9201387 A JP9201387 A JP 9201387A JP H0248319 B2 JPH0248319 B2 JP H0248319B2
- Authority
- JP
- Japan
- Prior art keywords
- nitrification
- denitrification
- 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.)
- Expired - Lifetime
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- 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、し尿などの有機性廃水における生物
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] [Industrial Application Field] The present invention relates to a biological denitrification device for organic wastewater such as human waste, and particularly relates to an improvement of a known nitrified liquid circulation biological denitrification device. be.
従来の硝化液循環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内のエアレーシヨンは、硝
化液循環ポンプ４とは別個のブロワー４′などで、
空気を散気管などから散気させることによつて行
つている。
In the denitrification process and nitrification process, which are the main parts of the conventional nitrified solution circulation biological denitrification process, as shown in FIG. The denitrification liquid flows naturally into the nitrification tank 2 through a communication pipe 3, and the nitrification liquid is circulated to the denitrification tank 1 by a nitrification liquid circulation pump 4. Tank 2
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 provided by a blower 4', etc., which is separate from the nitrification liquid circulation pump 4.
This is done by diffusing air through a diffuser pipe.
また、硝化槽２内のエアレーシヨンとして、水
中ポンプに空気を導く給気管を連接し、硝化槽２
内液を硝化槽２内で循環流動させながら曝気する
ことも行われていたが、脱窒素槽１への硝化液の
循環は別の硝化液循環ポンプ４で行われていたの
である。 In addition, for aeration in the nitrification tank 2, an air supply pipe that leads air to the submersible pump is connected to the nitrification tank 2.
Aerating the internal liquid while circulating it in the nitrification tank 2 was also practiced, but circulation of the nitrification liquid to the denitrification tank 1 was performed using a separate nitrification liquid circulation pump 4.
そして従来より、脱窒素槽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 greater the amount of nitrification fluid circulated into the denitrification tank 1, the higher the denitrification rate; however, in reality, the power of the nitrification fluid circulation pump 4 It is well known that it is not a good idea to increase the circulation ratio to more than 6 times the raw water flow rate in terms of cost and equipment costs.
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によつて、脱窒素槽１内にリサ
イクルしており、かつ、脱窒素槽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
液を脱窒素槽１の水面に落下させるなどの手段に
よつて、循環ポンプにエアレーシヨンの機能を同
時に付与せしめることは、硝化液循環生物学的脱
窒素プロセスの技術的目的に全く矛盾するため、
採用下可能なことであつた。 Moreover, as mentioned above, in the conventional method, the nitrification liquid is recycled into the denitrification tank 1 by the nitrification liquid circulation pump 4, and the denitrification tank 1 must be maintained in an anaerobic state. However, it is completely incompatible with the technical purpose of the nitrification liquid circulation biological denitrification process to simultaneously provide the circulation pump with an aeration function by dropping the circulation pump discharge liquid onto the water surface of the denitrification tank 1. Because of the contradiction,
This was something that could be adopted.
本発明は、この従来の硝化液循環脱窒素プロセ
スとは全く逆の発想によつて、水中ポンプ兼曝気
装置を従来ではみられなかつたような特異構成を
もつて配備し、硝化槽のブロワーなどによるエア
レーシヨンや硝化液循環専用ポンプを不要にし、
かつ脱窒素率や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 an idea completely opposite to the conventional nitrification liquid circulation denitrification process, and is equipped with a submersible pump and aeration device with a unique configuration that has not been seen before. This eliminates the need for aeration or pumps dedicated to nitrification liquid circulation.
The aim is to provide a new biological denitrification device that can dramatically improve the denitrification rate.
また本発明の他の目的は、従来の前記問題点を
克服し、硝化液循環流量を水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すること
にある。 Another object of the present invention is to overcome the above-mentioned conventional problems and to make it possible to increase the nitrification liquid circulation flow rate to a water width without increasing the total operating cost compared to the conventional method. The object of the present invention is to provide an apparatus that can significantly improve denitrification 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互いに液面下で連通せし
め、前記硝化部内に周囲に吐出口を開口した水中
ポンプ兼曝気装置を浸漬配備し、該水中ポンプ兼
曝気装置の液の吸入部を前記脱窒素部内に連通さ
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 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 partitioned, in which the denitrification section and the nitrification section are connected through a communication passage. A submersible pump and aeration device that communicates with each other below the liquid surface and has a discharge port opened around the nitrification section is provided immersed, and a liquid suction section of the submersible pump and aeration device is communicated with the denitrification section. This is a biological denitrification device for wastewater characterized by:
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。第１図においては、区画形成され
た原液流入部８を有する脱窒素槽１の上部と処理
水流出部９を有する硝化槽２の上部とを連通路用
の配管３によつて互いに液面下で連通し、硝化槽
２内には液と共に空気を吸引して周囲に開口され
た吐出口２６から吐出す水中ポンプ兼曝気装置２
４を浸漬配備し、この水中ポンプ兼曝気装置２４
の吸込管２５を脱窒素槽１の下部に連通し、且つ
周囲の吐出口２６を硝化槽２内に位置させてあ
る。この水中ポンプ兼曝気装置２４には水中モー
タ２２及び吸気管２３が連接されている。
The present invention will be explained by way of example with reference to FIGS. 1 and 2. FIG. In FIG. 1, the upper part of a denitrification tank 1 having a partitioned raw solution inlet 8 and the upper part of a nitrification tank 2 having a treated water outlet 9 are connected to each other below the liquid level by a pipe 3 for a communication passage. A submersible pump and aeration device 2 is connected to the nitrification tank 2, and sucks air together with the liquid into the nitrification tank 2, and discharges it from a discharge port 26 opened around the nitrification tank 2.
4 is immersed, and this submersible pump and aeration device 24
The suction pipe 25 is connected to the lower part of the denitrification tank 1, and the surrounding discharge port 26 is located inside the nitrification tank 2. A submersible motor 22 and an intake pipe 23 are connected to this submersible pump/aerator 24 .
第２図例では第１図例での連通路用の配管３を
脱窒素槽１の上部液面下と硝化槽２の下部に連結
したもので必要に応じ配管３に代えて各槽壁を利
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 liquid level of the denitrification tank 1 and the lower part of the nitrification tank 2. It is also possible to form a tank in a connected state in which a communication channel is formed.
しかして、脱窒素槽１内の下部から水中ポンプ
兼曝気装置２４によつて吸込管２５を経て硝化槽
２に強制的に移送された脱窒素槽内液は、硝化槽
２内で周囲の吐出口２６から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つて、硝化槽２内全
体にわたつて循環流動されて効果的な曝気が行わ
れ、脱窒素槽内液中のNH4―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
つてNOX-Ｎに転換され、BODも除去される。ま
た、硝化槽２内の硝化液の大部分は、脱窒素槽内
液が水中ポンプ兼曝気装置４によつて強制的に移
送される作用を利用して配管３を経由して自然流
過で脱窒素槽１内上部の液面下にリサイクルさ
れ、嫌気的な条件を低下させることなく原液流入
部８から流入した原液中の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、脱窒素槽１の下部から
前記のように硝化槽２に強制的に移送される。 The denitrification tank liquid, which is forcibly transferred from the lower part of the denitrification tank 1 to the nitrification tank 2 via the suction pipe 25 by the submersible pump and aeration device 24, is transferred to the nitrification tank 2 by the submersible pump and aeration device 24. Air or gas containing pure oxygen, which is discharged from the outlet 26 and simultaneously pumped or sucked from the air supply pipe 23, is circulated throughout the nitrification tank 2 to perform effective aeration. NH 4 -N and trace amounts of residual water in the denitrification tank liquid
BOD is converted to NOX- N by nitrifying bacteria and BOD-assimilating bacteria in the nitrification tank 2, and BOD is also removed. Furthermore, most of the nitrified liquid in the nitrification tank 2 is allowed to flow naturally through the piping 3 by utilizing the action of forcibly transferring the liquid in the denitrification tank by the submersible pump and aeration device 4. NOx- N is reduced to N2 gas and released, and is forcibly transferred from the lower part of the denitrification tank 1 to the nitrification tank 2 as described above.
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素槽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 nitrogen tank 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
は脱窒素槽が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脱窒素法で
は実現不可能な高い値が安定して得られる。 The present invention is suitable for any wastewater (sewage, sewage, etc.) containing NH4 - N.
It is particularly applicable to highly concentrated organic wastewater such as human waste containing high concentrations of BOD and NH 4- N, without using dilution water and in a much more compact form. The equipment (retention time is 1 day for denitrification tank and 2 days for nitrification tank), BOD and T
- N removal rate of 99%, a high value that cannot be achieved with conventional biological denitrification methods, can be stably obtained.
即ち、本発明では脱窒素槽内液を、脱窒素槽下
部から水中ポンプ兼曝気装置によつて硝化槽に強
制的に移送させると同時に硝化槽内全体にわたつ
て循環流動させて効果的な曝気も行われ、且つ硝
化槽内の硝化液が脱窒素槽内液の強制的移送の作
用によつて自然流過で脱窒素槽上部の液面下に流
入することによつて脱窒素槽内の脱窒素作用を低
下させることなく、しかも脱窒素槽内では液の流
出は下部から行われ、硝化液の流入は上部から行
われて短絡流が防止され、また従来法では必要と
した空気ブロワーなどの曝気設備や硝化液循環ポ
ンプが不要となり、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、さらに、従来法で
は硝化液循環ポンプがエアレーシヨンの機能をも
つておらず、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倍以上に増
加させることは運転経費上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
エアレーシヨ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ヨ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 from the lower part of the denitrification tank to the nitrification tank by a submersible pump and aeration device, and at the same time, the liquid is circulated throughout the nitrification tank to achieve effective aeration. In addition, the nitrified solution in the nitrification tank flows naturally below the liquid level at the top of the denitrification tank due to the action of forced transfer of the liquid in the denitrification tank. Without reducing the denitrification effect, in the denitrification tank, the liquid flows out from the bottom, and the nitrification liquid flows in from the top, preventing short-circuit flow, and does not require an air blower, which was required in the conventional method. This eliminates the need for aeration equipment and nitrification liquid circulation pumps, making it possible to perform denitrification and nitrification efficiently with compact equipment.Furthermore, in the conventional method, the nitrification liquid circulation pump does not have an aeration function; Since it is used only for a single purpose, increasing the circulation ratio by more than 6 to 7 times would be uneconomical in terms of operating costs.However, in the present invention, the pump that transfers the liquid in the denitrification tank has an aeration function. , the aeration power required by the conventional method can be used as the pump power, and even if the circulation ratio is set to 100 times or more,
It does not increase operating costs, and the circulation ratio can be set to an overwhelmingly high level, so the denitrification rate is lower than that of conventional methods.
This can be greatly improved and operation management becomes easier.
以上述べたように本発明によれば、従来の硝化
液循環生物学的脱窒素とは全く逆の発想よつて、
硝化部内に浸漬配備した水中ポンプ兼曝気装置に
よつて脱窒素部内液を硝化部内に強制移送すると
同時にその周囲から硝化部内全体にわたつて吐出
して循環流動させながら効果的な曝気を行い、硝
化部内の硝化液は脱窒素部内に液面下で自然流過
で流入して脱窒素部内の脱窒素作用を低下させる
ことがなく、さらに硝化部のブロワーなどによる
エアレーシヨンや硝化液循環用ポンプを不要に
し、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 idea is completely opposite to the conventional biological denitrification through nitrification fluid circulation.
A submersible pump and aeration device installed immersed in the nitrification section forcibly transfers the liquid within the denitrification section into the nitrification section, and at the same time discharges it from its surroundings throughout the nitrification section for effective aeration while circulating and flowing the nitrification section. The nitrification liquid in the unit flows into the denitrification unit by natural flow below the liquid level, so the denitrification effect in the denitrification unit does not deteriorate, and there is no need for aeration using a blower in the nitrification unit or a pump for circulating nitrification liquid. It is possible to dramatically increase the circulation ratio of the nitrifying solution, dramatically improving denitrification efficiency, and producing extremely beneficial effects such as no increase in operating costs and easy operation management. It is.
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。
１…脱窒素槽、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…水中モータ、２３…給気管、２４…
水中ポンプ兼曝気装置、２５…吸込管、２６…吐
出口。
1 and 2 are explanatory diagrams showing an embodiment of the present invention, and FIG. 3 is an explanatory diagram of a conventional example. DESCRIPTION OF SYMBOLS 1... Denitrification tank, 2... Nitrification tank, 3... Piping, 4... Nitrification liquid circulation pump, 8... Raw solution inflow part, 9... Treated water outflow part, 22... Submersible motor, 23... Air supply pipe, 24...
Submersible pump and aeration device, 25...suction pipe, 26...discharge port.
Claims (1)
を有する硝化部とが区画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
を連通路にて互いに液面下で連通せしめ、前記硝
化部内に周囲に吐出口を開口した水中ポンプ兼曝
気装置を浸漬配備し、該水中ポンプ兼曝気装置の
液の吸入部を前記脱窒素部内に連通させたことを
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 partitioned, the denitrification section and the nitrification section are connected to each other through a communication passage at a liquid level. A submersible pump and aeration device is provided submerged in the nitrification section and has a discharge port opened around the nitrification section, and a liquid suction section of the submersible pump and aeration device is communicated with the denitrification section. Biological denitrification equipment for wastewater.
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 JPS62294498A (en) | 1987-12-21 |
| JPH0248319B2 true 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) |
Family Cites Families (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
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62294498A (en) | 1987-12-21 |
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