JPH06154783A - Waste water treatment device - Google Patents
Waste water treatment deviceInfo
- Publication number
- JPH06154783A JPH06154783A JP31072092A JP31072092A JPH06154783A JP H06154783 A JPH06154783 A JP H06154783A JP 31072092 A JP31072092 A JP 31072092A JP 31072092 A JP31072092 A JP 31072092A JP H06154783 A JPH06154783 A JP H06154783A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- water
- raw water
- treated
- sludge
- 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.)
- Withdrawn
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
Landscapes
- Activated Sludge Processes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、工場から排出される排
水の処理装置に関し、詳しくは生物処理式排水処理装置
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating wastewater discharged from factories, and more particularly to a biological treatment type wastewater treatment apparatus.
【０００２】[0002]
【従来の技術】工場からの排水を一般の河川に放流する
際、それに先立って排水を処理して窒素成分等を分解・
除去しておき、河川に悪影響を及ぼさないようにする。
上記排水処理に際しては、主として、図２に示す生物処
理式排水処理装置（１）を用い、特に窒素成分を除去す
る。上記排水処理装置（１）は原水槽（２）と曝気槽
（３）と沈殿槽（４）と処理水槽（５）とを具備し、ま
ず原水槽（２）は、ＢＯＤ（例えばアルコール等）、Ｃ
ＯＤ、ＴＮ（トータル窒素、即ちアンモニア性窒素や硝
酸性窒素の総称で、例えば尿素）等の被処理用負荷を含
有し、且つ、中和処理した原水（６）が流入してそれを
溜める。曝気槽（３）は嫌気性菌（脱窒菌）と好気性菌
（硝化菌）の２種類の微生物を含有する活性汚泥（７）
を収蔵してなり、脱窒菌と硝化菌とで原水（６）を生物
処理する。沈殿槽（４）は曝気槽（３）で処理された汚
泥含有処理水から汚泥（７）を沈降させて、処理水
（８）と汚泥（７）とに分離すると共に、一部の汚泥
（７）をポンプ（９）を介して曝気槽（３）に戻して補
充し、曝気槽（３）と沈殿槽（４）の各汚泥量を略均等
に保持しておく（但し、汚泥濃度は異なる。）。処理水
槽（５）は沈殿槽（４）から供給された処理水（８）を
貯留して逐次、排水する。2. Description of the Related Art Prior to discharging wastewater from a factory into a general river, the wastewater was treated to decompose nitrogen components and the like.
It should be removed so that the river is not adversely affected.
At the time of the wastewater treatment, a biological treatment type wastewater treatment apparatus (1) shown in FIG. 2 is mainly used to remove nitrogen components in particular. The wastewater treatment device (1) comprises a raw water tank (2), an aeration tank (3), a settling tank (4) and a treated water tank (5). First, the raw water tank (2) is a BOD (eg alcohol). , C
Raw water (6) containing a load to be treated, such as OD and TN (generally referring to total nitrogen, that is, ammonia nitrogen or nitrate nitrogen, which is urea, for example), and having been neutralized, flows in and accumulates it. The aeration tank (3) is an activated sludge (7) containing two types of microorganisms, anaerobic bacteria (denitrifying bacteria) and aerobic bacteria (nitrifying bacteria).
The raw water (6) is biologically treated with denitrifying bacteria and nitrifying bacteria. The settling tank (4) settles sludge (7) from the sludge-containing treated water treated in the aeration tank (3) and separates it into treated water (8) and sludge (7), and a part of sludge ( 7) is returned to the aeration tank (3) via the pump (9) for replenishment, and the amounts of sludge in the aeration tank (3) and the sedimentation tank (4) are kept substantially equal (however, the sludge concentration is different.). The treated water tank (5) stores the treated water (8) supplied from the settling tank (4) and sequentially discharges it.
【０００３】上記構成において、工場から原水（６）を
排出すると、それを原水槽（２）に流入させて溜め、更
に、ポンプ等で曝気槽（３）に所定量だけ供給する。そ
こで、曝気槽（３）に空気を吹き込む（曝気）ことによ
り汚泥（７）内で酸素が過剰になると、好気性の硝化菌
が活性になり、次式に示す硝化反応により、アンモニア
から硝酸が生じる。In the above structure, when raw water (6) is discharged from the factory, the raw water (6) flows into the raw water tank (2) to be stored therein, and is further supplied to the aeration tank (3) by a predetermined amount by a pump or the like. Therefore, when oxygen is excessive in the sludge (7) by blowing air (aeration) into the aeration tank (3), aerobic nitrifying bacteria are activated, and nitric acid is converted from ammonia into nitric acid by the nitrification reaction shown in the following formula. Occurs.
【０００４】 ＢＯＤ（ＣｎＨｍ）＋Ｏ2＋ＮＨ4ＯＨ＋活性汚泥（含硝
化菌）→ＣＯ2＋Ｈ2Ｏ＋ＨＮＯ3＋活性汚泥（含硝化
菌）＋増殖分 次に、曝気を停止することによって酸素が少なくなる
と、嫌気性の脱窒菌が活性になり、次式に示す脱窒反応
により、硝酸から窒素ガスが生じる。BOD (CnHm) + O 2 + NH 4 OH + activated sludge (nitrifying bacterium) → CO 2 + H 2 O + HNO 3 + activated sludge (nitrifying bacterium) + proliferation Next, when the aeration is stopped, oxygen decreases. , Anaerobic denitrifying bacteria become active, and nitrogen gas is generated from nitric acid by the denitrifying reaction shown by the following formula.
【０００５】 ＢＯＤ（ＣｎＨｍ）＋ＨＮＯ3＋活性汚泥（含脱窒菌）
→ＣＯ2＋Ｈ2Ｏ＋Ｎ2（窒素ガス）＋活性汚泥（含脱窒
菌）＋増殖分 上記曝気と停止を定サイクルで繰り返すことによりアン
モニアから窒素ガスが生じて発散し、原水中の窒素濃度
が漸次、減少していく。ここで、汚泥（７）中の微生物
は窒素成分（ＴＮ）を含んだ原水（６）中でＢＯＤ、Ｃ
ＯＤ等の被処理用負荷を栄養分とし、且つ、曝気と停止
の繰り返しにより繁殖しているため、原水（６）中の負
荷濃度を適宜、調整して微生物の繁殖を促進する。そし
て、汚泥含有処理水が曝気槽（３）から沈殿槽（４）に
流入すると、汚泥（７）を沈降させて清浄な上澄みの処
理水（８）を分離する。そして、沈降した汚泥（７）の
一部（汚泥含有処理水量の約一割）を曝気槽（３）に戻
して汚泥量を補充すると共に、曝気機構により微生物を
繁殖させる。又、処理水（８）は処理水槽（５）に回収
して貯留し、逐次、排水する。BOD (CnHm) + HNO 3 + activated sludge (including denitrifying bacteria)
→ CO 2 + H 2 O + N 2 (nitrogen gas) + activated sludge (including denitrifying bacteria) + proliferation content By repeating the above aeration and stopping in a fixed cycle, nitrogen gas is generated and released from ammonia, and the nitrogen concentration in the raw water gradually increases. , Decrease. Here, the microorganisms in the sludge (7) are BOD and C in the raw water (6) containing the nitrogen component (TN).
Since the load to be treated such as OD is used as a nutrient and is propagated by repeating aeration and termination, the concentration of the load in the raw water (6) is appropriately adjusted to promote the growth of microorganisms. Then, when the sludge-containing treated water flows from the aeration tank (3) into the sedimentation tank (4), the sludge (7) is allowed to settle to separate clean supernatant treated water (8). Then, part of the settled sludge (7) (about 10% of the amount of sludge-containing treated water) is returned to the aeration tank (3) to replenish the amount of sludge, and at the same time, microorganisms are propagated by the aeration mechanism. Further, the treated water (8) is collected and stored in the treated water tank (5), and is sequentially drained.
【０００６】[0006]
【発明が解決しようとする課題】解決しようとする課題
は、活性汚泥（７）中の微生物は窒素成分を含んだ原水
（６）中でＢＯＤ、ＴＮ等の被処理用負荷を栄養分と
し、且つ、曝気機構により繁殖しているため、連休等の
長期休暇時に工場稼働が停止し、原水供給が長期間停止
すると、上記微生物に対して栄養分の供給及び窒素成分
含有水流が不足又は欠乏する点である。この場合、曝気
槽（３）には栄養分となる負荷を必要に応じて補給すれ
ば良いが、曝気機構を持たない沈殿槽（４）においては
負荷を供給しても曝気が無いため、時間が経つと、沈殿
槽（４）に含まれる微生物は好気性菌は言うまでもな
く、嫌気性菌も相乗的に衰弱又は死滅して不活性化す
る。そこで、運転再開時、それを曝気槽（３）に戻し続
けていくと、曝気槽（３）内で活性微生物と不活性微生
物が混在し、曝気槽（３）及び沈殿槽（４）に収蔵され
る全微生物の内、活性のものが半減する結果となる。そ
のため、微生物の活性度及び処理機能が通常の約半分程
度まで低下して窒素濃度が高くなり、工場が再起動して
微生物が増殖して通常量に回復するまでに長時間を要す
るという不具合が生じる。例えば、工場稼働が１日停止
すると、数時間の回復時間を要し、５日停止すると、回
復に１０日以上の時間を要する。The problem to be solved is that the microorganisms in the activated sludge (7) use the load for treatment such as BOD and TN as nutrients in the raw water (6) containing the nitrogen component, and , Because it breeds due to the aeration mechanism, if the factory operation is stopped during long holidays such as consecutive holidays and the raw water supply is stopped for a long time, the nutrient supply and nitrogen-containing water flow to the above microorganisms will be insufficient or deficient. is there. In this case, it is sufficient to replenish the aeration tank (3) with a load serving as nutrients as needed, but in the settling tank (4) that does not have an aeration mechanism, even if the load is supplied, there is no aeration, so it takes time. After a while, the microorganisms contained in the settling tank (4), not to mention aerobic bacteria, are synergistically weakened or killed and inactivated. Therefore, when it is continuously returned to the aeration tank (3) when the operation is restarted, active microorganisms and inactive microorganisms are mixed in the aeration tank (3) and are stored in the aeration tank (3) and the precipitation tank (4). Of the total microorganisms used, the result is that the active one is halved. Therefore, the activity and treatment function of the microorganisms are reduced to about half of the normal level and the nitrogen concentration becomes high, and it takes a long time for the factory to restart and the microorganisms to grow and recover to the normal amount. Occurs. For example, if the factory operation stops for one day, it takes several hours of recovery time, and if it stops for five days, it takes 10 days or more for recovery.
【０００７】[0007]
【課題を解決するための手段】本発明は、被処理用負荷
含有原水が流入してそれを溜める原水槽と、好気性菌と
嫌気性菌からなる微生物を含有する生物処理用活性汚泥
が収蔵され、上記原水槽から供給した原水を汚泥中の微
生物で生物処理する曝気槽と、曝気槽から汚泥含有処理
水が流入すると共に、汚泥を沈降させて処理水と汚泥と
に分離し、且つ、汚泥の一部を曝気槽内に戻して補充す
る沈殿槽と、上記沈殿槽から処理水が流入し、それを貯
留して逐次、排水する処理水槽と、微生物の栄養分とな
る負荷の貯蔵槽と処理水還流管を有してなり、原水供給
停止時に処理水槽から還流管を経て処理水を還流させる
と共に、貯蔵槽から必要量の負荷を処理水に混ぜ、負荷
含有処理水を擬似原水として原水槽又は曝気槽に自動供
給する還流部とを具備したことを特徴とし、又、被処理
用負荷は、窒素成分を主成分とすることを特徴とする。[Means for Solving the Problems] The present invention stores a raw water tank in which raw water containing a load to be treated flows and collects it, and an activated sludge for biological treatment containing microorganisms composed of aerobic and anaerobic bacteria. The aeration tank that biologically treats the raw water supplied from the raw water tank with the microorganisms in the sludge, and the sludge-containing treated water flows in from the aeration tank, and the sludge is settled to separate the treated water and the sludge, and, A settling tank for returning a part of the sludge to the aeration tank for replenishment, a treated water tank from which the treated water flows in from the settling tank and sequentially stores and drains it, and a storage tank for a load serving as nutrients for microorganisms. It has a treated water return pipe, and when the raw water supply is stopped, the treated water is recirculated from the treated water tank through the return pipe, and a required amount of load from the storage tank is mixed with the treated water, and the treated water containing the load is used as the raw raw water. With a reflux unit that automatically supplies water or aeration tank Characterized in that Bei was also load treated is characterized by mainly containing nitrogen component.
【０００８】[0008]
【作用】上記技術的手段によれば、長期休暇時に工場か
らの原水供給が停止すると、還流部を駆動し、処理水槽
から還流した処理水に微生物の栄養分となる負荷を混ぜ
た擬似原水を原水槽又は曝気槽に自動供給し、活性汚泥
中の微生物に負荷を栄養分として補給し、工場稼働時と
同様の微生物の活性度を保持する。According to the above technical means, when the raw water supply from the factory is stopped during a long vacation, the recirculation section is driven, and the simulated raw water in which the treated water that has recirculated from the treated water tank is mixed with the load that is the nutrient of the microorganisms is used. It is automatically supplied to the water tank or aeration tank, and the load on the microorganisms in the activated sludge is supplemented as nutrients to maintain the same microorganism activity level as when the factory was in operation.
【０００９】[0009]
【実施例】本発明の実施例を図１を参照して以下に説明
する。図２に示す部分と同一部分には同一参照符号を付
してその説明を省略する。相違する点は、還流管（１
０）と貯蔵槽（１１）とを具備した還流部（１２）を付
設したことである。上記還流管（１０）は、処理水槽
（５）からポンプ（１３）を経て原水槽（２）又は曝気
槽（３）に処理水（８）を還流させる。貯蔵槽（１１）
は有機物や尿素等の微生物の栄養分となる負荷（１４）
を貯蔵すると共に、配管（１５）と定量ポンプ（１６）
を介して必要量の負荷（１４）を原水槽（２）又は曝気
槽（３）に供給し、還流した処理水（８）に負荷（１
４）を混ぜる。An embodiment of the present invention will be described below with reference to FIG. The same parts as those shown in FIG. 2 are designated by the same reference numerals and the description thereof will be omitted. The difference is that the reflux pipe (1
0) and the storage tank (11) are attached to the reflux section (12). The reflux pipe (10) recirculates the treated water (8) from the treated water tank (5) through the pump (13) to the raw water tank (2) or the aeration tank (3). Storage tank (11)
Is a nutrient load for microorganisms such as organic matter and urea (14)
(15) and metering pump (16)
The required amount of load (14) is supplied to the raw water tank (2) or the aeration tank (3) via the water, and the refluxed treated water (8) is loaded (1
4) mix.
【００１０】上記構成に基づき本発明の動作を次に説明
する。まず工場稼働中で通常の原水供給時には還流部
（１２）を停止させておく。そして、連休等の長期休暇
時に工場からの原水供給が停止すると、還流部（１２）
を駆動し、処理水槽（５）から排水を停止して処理水
（８）をポンプ（１３）により汲み上げ、原水槽（２）
又は曝気槽（３）に自動的に還流させる。同時に、貯蔵
槽（１１）から必要量、例えば定常負荷量の３０〜５０
％の負荷（１４）を処理水（８）と共に原水槽（２）又
は曝気槽（３）に自動供給し、還流した処理水（８）に
微生物の栄養分となる負荷（１４）を自動的に混ぜる。
そうすると、工場からの原水供給停止時に、処理水
（８）に負荷（１４）を混ぜた擬似的な負荷含有原水が
還流部（１２）により原水槽（２）から曝気槽（３）、
沈殿槽（４）及び処理水槽（５）を経て閉サイクルで自
動的に循環し、工場稼働時と同様、曝気槽（３）の汚泥
（７）中に微生物の栄養分が補給され続ける。そのた
め、微生物の活性度を通常時と同様に保持し、その機能
低下を防止する。The operation of the present invention based on the above configuration will be described below. First, the reflux section (12) is stopped when the factory is in operation and the normal raw water is supplied. When the raw water supply from the factory is stopped during long holidays such as consecutive holidays, the recirculation section (12)
To stop the drainage from the treated water tank (5) and pump up the treated water (8) by the pump (13) to obtain the raw water tank (2).
Alternatively, it is automatically returned to the aeration tank (3). At the same time, the required amount from the storage tank (11), for example, a steady load of 30 to 50
% Of the load (14) is automatically supplied to the raw water tank (2) or the aeration tank (3) together with the treated water (8), and the refluxed treated water (8) is automatically loaded with the load (14) which is a nutrient for microorganisms. mix.
Then, when the raw water supply from the factory is stopped, the simulated load-containing raw water obtained by mixing the treated water (8) with the load (14) is fed from the raw water tank (2) to the aeration tank (3) by the reflux section (12).
It automatically circulates in a closed cycle through the settling tank (4) and the treated water tank (5), and the nutrients of microorganisms are continuously supplied to the sludge (7) of the aeration tank (3) as in the factory operation. Therefore, the activity of the microorganism is maintained in the same manner as in the normal state, and the functional deterioration thereof is prevented.
【００１１】[0011]
【発明の効果】本発明によれば、生物処理式排水処理装
置において長期休暇時に工場から原水供給が停止する
と、還流部を駆動し、処理水に栄養分となる負荷を混ぜ
た擬似的な原水を循環させたから、生物処理用微生物の
機能低下を防止出来、その回復に要する時間が不要にな
って生産性が向上する。EFFECTS OF THE INVENTION According to the present invention, when the raw water supply from the factory is stopped during a long vacation in the biological treatment type waste water treatment equipment, the recirculation section is driven to generate simulated raw water in which the treated water is mixed with a load of nutrients. Since it is circulated, it is possible to prevent deterioration of the function of the microorganism for biological treatment, the time required for its recovery is unnecessary, and productivity is improved.
【図１】本発明に係る排水処理装置の実施例を示す概略
側断面図である。FIG. 1 is a schematic side sectional view showing an embodiment of a wastewater treatment device according to the present invention.
【図２】従来の排水処理装置の一例を示す概略側断面図
である。FIG. 2 is a schematic side sectional view showing an example of a conventional wastewater treatment device.
２ 原水槽 ３ 曝気槽 ４ 沈殿槽 ５ 処理水槽 ６ 原水 ７ 活性汚泥 ８ 処理水 １０ 還流管 １１ 貯蔵槽 １２ 負荷 2 Raw water tank 3 Aeration tank 4 Settling tank 5 Treated water tank 6 Raw water 7 Activated sludge 8 Treated water 10 Reflux pipe 11 Storage tank 12 Load
Claims (2)
溜める原水槽と、好気性菌と嫌気性菌からなる微生物を
含有する生物処理用活性汚泥が収蔵され、上記原水槽か
ら供給した原水を汚泥中の微生物で生物処理する曝気槽
と、曝気槽から汚泥含有処理水が流入すると共に、汚泥
を沈降させて処理水と汚泥とに分離し、且つ、汚泥の一
部を曝気槽内に戻して補充する沈殿槽と、上記沈殿槽か
ら処理水が流入し、それを貯留して逐次、排水する処理
水槽と、微生物の栄養分となる負荷の貯蔵槽と処理水還
流管を有してなり、原水供給停止時に処理水槽から還流
管を経て処理水を還流させると共に、貯蔵槽から必要量
の負荷を処理水に混ぜ、負荷含有処理水を擬似原水とし
て原水槽又は曝気槽に自動供給する還流部とを具備した
ことを特徴とする排水処理装置。1. A raw water tank in which raw water containing a load to be treated flows and collects it, and an activated sludge for biological treatment containing microorganisms composed of aerobic and anaerobic bacteria are stored and supplied from the raw water tank. Aeration tank that biologically treats raw water with microorganisms in sludge, and treated water containing sludge flows in from the aeration tank, while sludge is allowed to settle and separated into treated water and sludge, and part of the sludge is in the aeration tank. It has a settling tank to replenish and replenish it, a treated water tank from which the treated water flows in from the above settling tank, and sequentially stores and drains it, a storage tank for the load that becomes the nutrients of microorganisms, and a treated water return pipe. When the supply of raw water is stopped, the treated water is returned from the treated water tank through the reflux pipe, and a required amount of load is mixed with the treated water from the storage tank, and the treated water containing the load is automatically supplied to the raw water tank or the aeration tank as simulated raw water. A drainage characterized by having a reflux section. Water treatment equipment.
ることを特徴とする請求項１記載の排水処理装置。2. The wastewater treatment equipment according to claim 1, wherein the load to be treated has a nitrogen component as a main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31072092A JPH06154783A (en) | 1992-11-20 | 1992-11-20 | Waste water treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31072092A JPH06154783A (en) | 1992-11-20 | 1992-11-20 | Waste water treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06154783A true JPH06154783A (en) | 1994-06-03 |
Family
ID=18008671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31072092A Withdrawn JPH06154783A (en) | 1992-11-20 | 1992-11-20 | Waste water treatment device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06154783A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014046257A (en) * | 2012-08-31 | 2014-03-17 | Jfe Steel Corp | Biological treatment method of nitrogen-containing waste water |
| JP5900576B1 (en) * | 2014-10-24 | 2016-04-06 | 栗田工業株式会社 | Water treatment method and water treatment apparatus |
-
1992
- 1992-11-20 JP JP31072092A patent/JPH06154783A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014046257A (en) * | 2012-08-31 | 2014-03-17 | Jfe Steel Corp | Biological treatment method of nitrogen-containing waste water |
| JP5900576B1 (en) * | 2014-10-24 | 2016-04-06 | 栗田工業株式会社 | Water treatment method and water treatment apparatus |
| WO2016063852A1 (en) * | 2014-10-24 | 2016-04-28 | 栗田工業株式会社 | Water treatment method and water treatment device |
| JP2016083611A (en) * | 2014-10-24 | 2016-05-19 | 栗田工業株式会社 | Water treatment method and water treatment equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000201 |