JPH06497A - Treatment facility for organic wastewater containing nitrogen and phosphorus - Google Patents
Treatment facility for organic wastewater containing nitrogen and phosphorusInfo
- Publication number
- JPH06497A JPH06497A JP4157895A JP15789592A JPH06497A JP H06497 A JPH06497 A JP H06497A JP 4157895 A JP4157895 A JP 4157895A JP 15789592 A JP15789592 A JP 15789592A JP H06497 A JPH06497 A JP H06497A
- Authority
- JP
- Japan
- Prior art keywords
- phosphorus
- slurry
- tank
- nitrogen
- concentrated
- 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.)
- Pending
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Removal Of Specific Substances (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
(57)【要約】
【目的】 窒素とリンを含む有機性排水処理設備の沈澱
池の容量を小さくする。
【構成】 生物学的硝化脱窒装置の後に物理化学的脱リ
ン装置が接続された設備であって、その生物学的硝化脱
窒装置は、曝気槽の後に、負に帯電させた荷電膜を備え
た膜分離装置が設置され、その後に嫌気槽と沈澱池が設
置されている。上記膜分離装置に曝気された硝化スラリ
ーを導入すると、膜が負に帯電しているので、スラリー
中の窒素（NO3 - ）及びリン（PO4 - ）は膜の表面で電
気的に反発し、透過しない。そして、濾過水と窒素やリ
ンなどの除去対象物質を含むスラリーに分離される。こ
のため、窒素やリンなどが濃縮され、物理化学的脱リン
装置に送る処理液の量が大幅に減少する。
(57) [Summary] [Purpose] To reduce the capacity of the sedimentation basin of an organic wastewater treatment facility containing nitrogen and phosphorus. [Composition] This is a facility in which a physicochemical dephosphorization device is connected after a biological nitrification denitrification device, and the biological nitrification denitrification device has a negatively charged charged film after the aeration tank. The equipped membrane separator is installed, followed by the anaerobic tank and settling basin. The introduction of aerated nitrification slurry to the membrane separation device, because film is negatively charged, nitrogen in the slurry (NO 3 -) and phosphorus (PO 4 -) are electrically repelled by the surface of the film , Not transparent. Then, it is separated into a slurry containing filtered water and a substance to be removed such as nitrogen or phosphorus. For this reason, nitrogen, phosphorus, etc. are concentrated, and the amount of the processing liquid sent to the physicochemical dephosphorization device is greatly reduced.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、窒素とリンを含む有機
性排水の処理設備に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility for treating organic wastewater containing nitrogen and phosphorus.
【０００２】[0002]
【従来の技術】図２は、従来の設備の説明図である。こ
の設備は生物学的硝化脱窒装置２０の後に物理化学的脱
リン装置３０が接続された構成になっている。この設備
における生物学的硝化脱窒装置２０は、空気の流通が遮
断されるように構成された嫌気槽２１と、散気器２５を
備えた曝気槽２２と、沈澱池２３とが順次接続されてい
る。２４は散気器２５に空気を送るブロワーである。
又、物理化学的脱リン装置３０は、混合槽３１、緩速攪
拌槽３２、凝集沈澱池３３が接続されている。2. Description of the Related Art FIG. 2 is an explanatory view of conventional equipment. This equipment has a structure in which a physicochemical dephosphorization device 30 is connected after a biological nitrification denitrification device 20. In the biological nitrification denitrification apparatus 20 in this equipment, an anaerobic tank 21 configured to block the flow of air, an aeration tank 22 provided with an air diffuser 25, and a sedimentation tank 23 are sequentially connected. ing. A blower 24 sends air to the air diffuser 25.
Further, the physicochemical dephosphorization device 30 is connected to a mixing tank 31, a slow stirring tank 32, and a coagulating sedimentation tank 33.
【０００３】生物学的硝化脱窒装置２０では、原水と共
に沈澱池２３で濃縮された活性汚泥と曝気槽２２で硝化
された汚泥スラリーが嫌気槽２１へ送られ、嫌気状態に
保持される。ここで、硝化汚泥スラリーから持ち込まれ
た硝酸性窒素（NO3-N ）が窒素ガス（N2）に分解されて
除去される。次いで、このスラリーは曝気槽２２に送ら
れ、原水中の有機物が分解されると共にアンモニア性窒
素（NH4-N ）が硝酸性窒素（NO3-N ）になる。そして、
この硝化汚泥スラリーの所定量が嫌気槽２１に戻され、
残りが沈澱池２３へ送られて静置され、溢流水と濃縮汚
泥とに分離される。濃縮汚泥の所定量は嫌気槽２１へ返
送され、溢流水は次の物理化学的脱リン装置３０へ送ら
れる。In the biological nitrification and denitrification apparatus 20, the activated sludge concentrated in the settling tank 23 and the sludge slurry nitrified in the aeration tank 22 are sent to the anaerobic tank 21 together with the raw water and kept in an anaerobic state. Here, nitrate nitrogen (NO 3 -N) brought in from the nitrifying sludge slurry is decomposed into nitrogen gas (N 2 ) and removed. Next, this slurry is sent to the aeration tank 22, and the organic matter in the raw water is decomposed and the ammonia nitrogen (NH 4 —N) becomes nitrate nitrogen (NO 3 —N). And
A predetermined amount of this nitrifying sludge slurry is returned to the anaerobic tank 21,
The rest is sent to the settling basin 23 and left to stand still, where it is separated into overflow water and concentrated sludge. A predetermined amount of concentrated sludge is returned to the anaerobic tank 21, and the overflow water is sent to the next physicochemical dephosphorization device 30.
【０００４】物理化学的脱リン装置３０では、混合槽３
１へ送られた溢流水に硫酸ばん土や塩化第二鉄などの脱
リン剤（凝集剤を兼ねる）、消石灰などのｐＨ調整剤、
及び必要に応じて高分子物質の凝集助剤が添加され、緩
速攪拌槽３２で攪拌された後、凝集沈澱池３３で静置さ
れ、処理水と脱リン汚泥とに分けられる。そして、処理
水は放流され、脱リン汚泥は別途処分される。In the physicochemical dephosphorization device 30, the mixing tank 3
In the overflow water sent to No. 1, dephosphorizing agent (also serving as a flocculant) such as sulphate and ferric chloride, pH adjusting agent such as slaked lime
And, if necessary, a coagulation aid of a polymer substance is added, stirred in a slow stirring tank 32, and then allowed to stand in a coagulation sedimentation basin 33 to be separated into treated water and dephosphorized sludge. Then, the treated water is discharged and the dephosphorized sludge is separately disposed.
【０００５】[0005]
【発明が解決しようとする課題】上記従来の設備には次
のような問題がある。生物学的硝化脱窒処理及び物理化
学的脱リン処理を行なう排水処理設備においては、いず
れの処理にもスラリーの沈降分離を行なう操作が含まれ
ている。そして、生物学的硝化脱窒処理で生成する汚泥
や、物理化学的脱リン処理で生成する脱リン汚泥（凝集
物）の沈降速度は非常に遅く、汚泥の沈降分離を行なう
沈澱池や、脱リン汚泥の沈降分離を行なう凝集沈澱池は
大きな容量を必要とする。本発明は、上記各沈澱池の容
量が小さい窒素とリンを含む有機性排水の処理設備を提
供することを目的とする。The above-mentioned conventional equipment has the following problems. In the wastewater treatment facility that performs the biological nitrification denitrification treatment and the physicochemical dephosphorization treatment, both treatments include an operation of performing sedimentation separation of the slurry. The sludge produced by biological nitrification and denitrification and the dephosphorized sludge (aggregates) produced by physicochemical dephosphorization have a very slow sedimentation rate, and a sedimentation basin for sedimentation and separation of sludge and Coagulation sedimentation basins that perform sedimentation separation of phosphorus sludge require a large capacity. It is an object of the present invention to provide a treatment facility for organic wastewater containing nitrogen and phosphorus, each of which has a small capacity in each sedimentation tank.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明における生物学的硝化脱窒装置は、散気器
を備え原水中の窒素を硝化させる曝気槽と、負に帯電さ
せた荷電膜を備え曝気槽から送られてくる硝化汚泥スラ
リーを陰イオン及び活性汚泥が濃縮されたスラリーと透
過水とに分ける膜分離装置と、膜分離装置から送られて
くる濃縮スラリーを脱窒する嫌気槽と、この嫌気槽から
送られた濃縮スラリーを静置して溢流水と濃縮活性汚泥
とに分ける沈澱池が順次接続された構成になっている。In order to achieve the above object, the biological nitrification / denitrification apparatus according to the present invention comprises an aerator and an aeration tank for nitrifying nitrogen in raw water, and a negatively charged aeration tank. Equipped with a charged membrane to separate the nitrifying sludge slurry sent from the aeration tank into a slurry in which anions and activated sludge are concentrated and permeate, and a denitrifying concentrated slurry sent from the membrane separator. The anaerobic tank and the sedimentation basin for separating the concentrated slurry sent from the anaerobic tank into the overflow water and the concentrated activated sludge are sequentially connected.
【０００７】[0007]
【作用】本発明を使用した脱窒、脱リン処理において
は、受け入れた原水を、まず曝気槽に入れて曝気し、原
水中のアンモニア性窒素（NH4-N ）を硝酸性窒素（NO3-
N）にする。この処理によって原水中の窒素は陰イオン
（NO3 - ）になるので、原水に含まれていたリン（PO4
- ）を含め除去する対象の物質はすべて陰イオンにな
る。次いで、陰イオンになった窒素及びリンを含む活性
汚泥のスラリーを膜分離装置に通す。この際、分離装置
の膜が負に帯電させた荷電膜であるので、窒素（N
O3 - ）及びリン（PO4 - ）は膜の表面で電気的に反発
し、透過しない。In the denitrification and dephosphorization treatment using the present invention, the received raw water is first placed in an aeration tank for aeration, and ammonia nitrogen (NH 4 -N) in the raw water is converted to nitrate nitrogen (NO 3 -
N). Nitrogen in raw water by this treatment anions (NO 3 -). Therefore, the phosphorus contained in the raw water (PO 4
- substances for which removal including) all become the anion. Then, a slurry of activated sludge containing nitrogen and phosphorus which have become anion is passed through a membrane separator. At this time, since the membrane of the separator is a negatively charged charged membrane, nitrogen (N
O 3 -) and phosphorus (PO 4 -) are electrically repelled by the surface of the film, does not transmit.
【０００８】このため、この濾過において、膜を透過し
た水には窒素やリンは含まれていない。従って、この濾
過操作によって、汚泥スラリーは透過水と膜を透過しな
い物質、即ち窒素やリンのイオン及び汚泥、が濃縮され
たスラリーとに分けられる。そして、上述の処理によっ
て濃縮され、その量が減少したスラリーが脱窒、脱リン
などの以後の処理に供される。Therefore, in this filtration, the water that has permeated the membrane does not contain nitrogen or phosphorus. Therefore, by this filtration operation, the sludge slurry is divided into permeated water and a slurry in which substances that do not permeate the membrane, that is, ions of nitrogen and phosphorus and sludge are concentrated. Then, the slurry, which has been concentrated by the above-mentioned treatment and whose amount has been reduced, is subjected to subsequent treatments such as denitrification and dephosphorization.
【０００９】[0009]
【実施例】図１は本発明に係る一実施例の説明図であ
る。本実施例の設備は生物学的硝化脱窒装置１の後に物
理化学的脱リン装置３０が接続された構成になってお
り、その物理化学的脱リン装置３０の構成については図
２と同じであるので、同一の符号を付し説明を省略す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory diagram of an embodiment according to the present invention. The equipment of this embodiment has a structure in which a physicochemical dephosphorization device 30 is connected after the biological nitrification denitrification device 1, and the structure of the physicochemical dephosphorization device 30 is the same as that in FIG. Therefore, the same reference numerals are given and description thereof will be omitted.
【００１０】本実施例における生物学的硝化脱窒装置１
は、散気器７を備えた曝気槽２と、負に帯電させた荷電
膜を備えた膜分離装置（濾過機）３と、空気の流通が遮
断されるように構成された嫌気槽４と、沈澱池５が順次
接続されている。６は散気器７に空気を送るブロワーで
ある。Biological nitrification and denitrification apparatus 1 in this embodiment
Is an aeration tank 2 provided with an air diffuser 7, a membrane separation device (filter) 3 provided with a negatively charged charged film, and an anaerobic tank 4 configured to cut off the flow of air. , The settling basin 5 is connected in sequence. A blower 6 sends air to the air diffuser 7.
【００１１】本実施例の排水処理設備においては、原水
は、まず曝気槽７へ供給されて曝気される。この曝気に
よって、原水中の有機物が分解されると共にアンモニア
性窒素（NH4-N ）が硝酸性窒素（NO3-N ）になる。硝化
汚泥のスラリーは膜分離装置３へ加圧供給される。膜分
離装置３では、膜を透過した水が抜き出されるので、硝
化汚泥のスラリーは濃縮され、窒素、リンなどの陰イオ
ンと汚泥の濃度が非常に高くなる。この濃縮された硝化
汚泥スラリーの所定量は嫌気槽４へ送られ、残りは曝気
槽２へ返送される。透過水は放流される。曝気槽２へ送
られた濃縮硝化汚泥スラリーは、沈澱池５から返送され
た濃縮汚泥と共に嫌気状態に保持され、脱窒される。次
いで、脱窒された汚泥スラリーは沈澱池５へ送られて静
置され、溢流水と濃縮汚泥とに分離される。濃縮汚泥の
所定量は嫌気槽４へ返送され、溢流水は次の物理化学的
脱リン装置３０へ送られる。In the wastewater treatment facility of this embodiment, raw water is first supplied to the aeration tank 7 and aerated. By this aeration, the organic matter in the raw water is decomposed and ammonia nitrogen (NH 4 -N) becomes nitrate nitrogen (NO 3 -N). The nitrification sludge slurry is supplied under pressure to the membrane separation device 3. In the membrane separation device 3, since the water that has permeated the membrane is extracted, the slurry of nitrifying sludge is concentrated, and the anions such as nitrogen and phosphorus and the concentration of sludge become very high. A predetermined amount of the concentrated nitrifying sludge slurry is sent to the anaerobic tank 4, and the rest is returned to the aeration tank 2. The permeate is discharged. The concentrated nitrifying sludge slurry sent to the aeration tank 2 is held in an anaerobic state together with the concentrated sludge returned from the settling tank 5 and denitrified. Next, the denitrified sludge slurry is sent to the settling tank 5 and allowed to stand, and is separated into overflow water and concentrated sludge. A predetermined amount of concentrated sludge is returned to the anaerobic tank 4, and the overflow water is sent to the next physicochemical dephosphorization device 30.
【００１２】上述の構成による設備によって脱窒、脱リ
ンを行なう場合、窒素、リンを含む硝化汚泥スラリー
が、荷電膜によって濃縮されるので、嫌気槽４へ送られ
るスラリー量が著しく減少する。このため、沈澱池５及
び物理化学的脱リン装置３０の槽類は非常に小型のもの
でよい。又、嫌気槽４へ送られる硝化汚泥スラリーが濃
縮されでいるので、沈澱池５から返送する濃縮汚泥の量
が少なくて済む。When denitrification and dephosphorization are performed by the equipment having the above-mentioned structure, the nitrifying sludge slurry containing nitrogen and phosphorus is concentrated by the charged film, so that the amount of slurry sent to the anaerobic tank 4 is significantly reduced. Therefore, the tanks of the sedimentation tank 5 and the physicochemical dephosphorization device 30 may be very small. Further, since the nitrification sludge slurry sent to the anaerobic tank 4 is concentrated, the amount of concentrated sludge returned from the settling tank 5 can be small.
【００１３】[0013]
【発明の効果】本発明は生物学的硝化脱窒装置の後に物
理化学的脱リン装置が接続された設備であり、その生物
学的硝化脱窒装置は、曝気槽の後に、負に帯電させた荷
電膜を備えた膜分離装置が設置され、その後に嫌気槽と
沈澱池が設置されている。The present invention is a facility in which a physicochemical dephosphorization device is connected after a biological nitrification denitrification device, and the biological nitrification denitrification device is negatively charged after an aeration tank. A membrane separator with a charged membrane is installed, followed by an anaerobic tank and a sedimentation tank.
【００１４】本発明を使用すると、曝気槽で硝化された
スラリーを膜分離装置で濃縮してその量を減少させた
後、脱窒処理し、次いで脱リン処理をするので、沈澱池
及び物理化学的脱リン装置は非常に小型になる。According to the present invention, the slurry nitrified in the aeration tank is concentrated in a membrane separator to reduce its amount, and then denitrification treatment is performed, followed by dephosphorization treatment. The dephosphorization device becomes very small.
【図１】本発明に係る一実施例の説明図である。FIG. 1 is an explanatory diagram of an embodiment according to the present invention.
【図２】従来の有機性排水の脱窒、脱リンする設備の説
明図である。FIG. 2 is an explanatory diagram of conventional equipment for denitrifying and dephosphorizing organic wastewater.
１ 生物学的脱窒装置 ２，２２ 曝気槽 ３ 膜分離装置 ４，２１ 嫌気槽 ５，２３ 沈澱池 ３１ 混合槽 ３２ 緩速攪拌槽 ３３ 凝集沈澱池 1 Biological denitrification equipment 2,22 Aeration tank 3 Membrane separation device 4,21 Anaerobic tank 5,23 Sedimentation tank 31 Mixing tank 32 Slow stirring tank 33 Coagulation sedimentation tank
Claims (1)
脱リン装置が接続された有機性排水の処理設備におい
て、生物学的硝化脱窒装置が、散気器を備え原水中の窒
素を硝化させる曝気槽と、負に帯電させた荷電膜を備え
前記曝気槽から送られてくる硝化汚泥スラリーを陰イオ
ン及び活性汚泥が濃縮されたスラリーと透過水とに分け
る膜分離装置と、前記膜分離装置から送られてくる濃縮
スラリーを脱窒する嫌気槽と、この嫌気槽から送られた
濃縮スラリーを静置して溢流水と濃縮活性汚泥とに分け
る沈澱池が順次接続された構成になっていることを特徴
とする窒素とリンを含む有機性排水の処理設備。1. In an organic wastewater treatment facility in which a physicochemical dephosphorization device is connected after a biological nitrification denitrification device, the biological nitrification denitrification device is equipped with a diffuser and nitrogen in raw water. An aeration tank for nitrifying, and a membrane separation device for dividing the nitrification sludge slurry sent from the aeration tank into a slurry in which anions and activated sludge are concentrated and permeated water, comprising a negatively charged charged film, and An anaerobic tank that denitrifies the concentrated slurry sent from the membrane separator, and a settling tank that connects the concentrated slurry sent from this anaerobic tank to overflow water and concentrated activated sludge are connected in sequence. A facility for treating organic wastewater containing nitrogen and phosphorus, which is characterized by
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4157895A JPH06497A (en) | 1992-06-17 | 1992-06-17 | Treatment facility for organic wastewater containing nitrogen and phosphorus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4157895A JPH06497A (en) | 1992-06-17 | 1992-06-17 | Treatment facility for organic wastewater containing nitrogen and phosphorus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06497A true JPH06497A (en) | 1994-01-11 |
Family
ID=15659767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4157895A Pending JPH06497A (en) | 1992-06-17 | 1992-06-17 | Treatment facility for organic wastewater containing nitrogen and phosphorus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06497A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH091188A (en) * | 1995-06-20 | 1997-01-07 | Toto Ltd | Waste water treating device and its operating method |
| JP2002066588A (en) * | 2000-08-25 | 2002-03-05 | Toshiba Corp | Wastewater treatment equipment |
-
1992
- 1992-06-17 JP JP4157895A patent/JPH06497A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH091188A (en) * | 1995-06-20 | 1997-01-07 | Toto Ltd | Waste water treating device and its operating method |
| JP2002066588A (en) * | 2000-08-25 | 2002-03-05 | Toshiba Corp | Wastewater treatment equipment |
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