JPH0747390A - Sewage treating device - Google Patents
Sewage treating deviceInfo
- Publication number
- JPH0747390A JPH0747390A JP6158698A JP15869894A JPH0747390A JP H0747390 A JPH0747390 A JP H0747390A JP 6158698 A JP6158698 A JP 6158698A JP 15869894 A JP15869894 A JP 15869894A JP H0747390 A JPH0747390 A JP H0747390A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- screen
- nitrification
- treatment
- nitrification 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.)
- Granted
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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、汚水の処理装置に係
り、特に硝化細菌を固定化した担体を用いた汚水の処理
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment apparatus, and more particularly to a sewage treatment apparatus using a carrier on which nitrifying bacteria are immobilized.
【０００２】[0002]
【従来の技術】窒素を含む有機性汚水（以下、単に汚水
という）の生物学的処理法としては、活性汚泥循環変法
が知られている。この方法は、脱窒槽、硝化槽及び沈澱
池をそれぞれ設け、脱窒槽に供給された汚水は、脱窒槽
内において、嫌気条件下で脱窒細菌の作用により、汚水
中の窒素成分はＮＯ3 - → Ｎ2 の反応により窒素とな
って除去される。一方、脱窒槽の処理液は、硝化槽内に
おいて、好気条件下で硝化細菌の作用により、処理液内
の窒素成分はＮＨ3 + →ＮＯ3 - となる。硝化槽の処理
液の大部分は硝化液循環ラインを経て脱窒槽に戻され、
硝化槽処理液内の窒素成分ＮＯ3 - は再び脱窒槽におい
て、前記反応により窒素となり液中から除去される。硝
化槽の処理液の一部は沈澱槽に供給され、得られた処理
水は放流され、沈殿した汚泥は一部が前記脱窒槽に返送
循環され、残部は余剰汚泥として処分される。そして、
この処理工程では、汚水中のＢＯＤ成分も分解除去され
る。2. Description of the Related Art As a biological treatment method for organic wastewater containing nitrogen (hereinafter, simply referred to as wastewater), a modified activated sludge circulation method is known. This method is provided denitrification, nitrification tank and sedimentation, respectively, sewage supplied to the denitrification tank, within the denitrification tank, by the action of denitrifying bacteria under anaerobic conditions, nitrogen component in the sewage NO 3 - → It becomes nitrogen by the reaction of N 2 and is removed. On the other hand, in the treatment liquid in the denitrification tank, the nitrogen component in the treatment liquid becomes NH 3 + → NO 3 − due to the action of nitrifying bacteria in the nitrification tank under aerobic conditions. Most of the treatment liquid in the nitrification tank is returned to the denitrification tank through the nitrification liquid circulation line,
In the denitrification tank, the nitrogen component NO 3 − in the nitrification tank treatment solution becomes nitrogen by the above reaction and is removed from the solution. Part of the treatment liquid in the nitrification tank is supplied to the settling tank, the obtained treated water is discharged, part of the sludge that has settled is returned to the denitrification tank for circulation, and the rest is disposed of as excess sludge. And
In this treatment step, BOD components in wastewater are also decomposed and removed.
【０００３】[0003]
【発明が解決しようする課題】この処理方式は、活性汚
泥法と同様に反応に寄与する活性汚泥（微生物の集合
物）が浮遊循環する方式であり、増殖速度の遅い硝化細
菌は、余剰汚泥として系外に流出しやすく、また、低水
温では活性が著しく低下する。このため、最近では硝化
細菌を固定化し高濃度に菌体を保持して反応速度を向上
させる研究が進められており、高分子含水ゲル中に硝化
細菌を固定化した担体を活性汚泥循環変法の硝化槽に投
入し、効率良く窒素除去を行うための処理方法が提案さ
れている。このことから、硝化槽の処理液流出口には、
担体を分離する為のスクリーンが設けられている。This treatment system is a system in which activated sludge (aggregate of microorganisms) that contributes to the reaction is suspended and circulated like the activated sludge process, and nitrifying bacteria having a slow growth rate are treated as excess sludge. It easily flows out of the system, and its activity is significantly reduced at low water temperature. For this reason, recently, studies have been conducted to immobilize nitrifying bacteria and retain the cells at a high concentration to improve the reaction rate. A carrier prepared by immobilizing nitrifying bacteria in a high-molecular hydrogel was activated sludge circulation modified method. In order to remove nitrogen efficiently, the treatment method has been proposed. From this fact, at the treatment liquid outlet of the nitrification tank,
A screen is provided for separating the carriers.
【０００４】しかしながら、処理液流出口にスクリーン
を設けると、担体を分離するばかりでなく、汚水中に浮
遊している固体成分（以下、ＳＳという）等を分離する
為にスクリーンが汚れて目詰まりし、処理液の流出を阻
害するという欠点がある。また、処理液の流出が阻害さ
れると、硝化槽から脱窒槽への処理液の戻り量が変動す
るため、生物学的処理の効率低下を招くという問題が発
生する。従って、例えば、逆洗装置等を別設して頻繁に
スクリーンを逆洗する必要がある。However, if a screen is provided at the outlet of the treatment liquid, not only the carrier is separated but also the solid component (hereinafter referred to as SS) floating in the dirty water is separated, so that the screen becomes dirty and clogged. However, there is a drawback that the outflow of the processing liquid is obstructed. Further, when the outflow of the treatment liquid is obstructed, the amount of the treatment liquid returned from the nitrification tank to the denitrification tank varies, which causes a problem that the efficiency of biological treatment is reduced. Therefore, for example, it is necessary to separately install a backwash device and frequently backwash the screen.
【０００５】本発明は、このような事情に鑑みてなされ
たもので、担体を分離するスクリーンの汚れによる目詰
まりが発生しないので、処理液をスムーズに流出させる
ことができ、生物処理を効率良く行うことのできる汚水
の処理装置を提供することを目的とする。The present invention has been made in view of such circumstances, and since clogging due to dirt on the screen for separating the carrier does not occur, the treatment liquid can be smoothly flowed out and the biological treatment can be efficiently performed. It is an object of the present invention to provide a sewage treatment apparatus that can be performed.
【０００６】[0006]
【課題を解決する為の手段】本発明は、前記目的を達成
する為に、有機性汚水を生物学的に処理する汚水の処理
装置に於いて、前記有機性汚水が流入する処理槽と、前
記処理槽内に多数収納されて前記生物学的処理を行う微
生物を担持した担体と、前記処理槽上部に該処理槽の内
側に傾斜して設けられ、処理液の流出口を形成すると共
に前記担体を分離する縦目状のスクリーンと、前記処理
槽内下方位置で前記スクリーンの下方領域に設けられ、
前記スクリーンに向かって気体を噴出する散気装置と、
から成り、前記散気装置からの気体により前記スクリー
ン面に気泡と前記担体とを衝突させることを特徴とす
る。In order to achieve the above-mentioned object, the present invention provides a sewage treatment apparatus for biologically treating organic sewage, comprising: a treatment tank into which the organic sewage flows; A carrier loaded with a plurality of microorganisms for carrying out the biological treatment, which is housed in the treatment tank, is provided on the upper portion of the treatment tank so as to be inclined toward the inside of the treatment tank, and forms an outlet for the treatment liquid. Provided in a lower region of the screen at a lower position in the processing tank, and a vertical screen separating the carrier,
An air diffuser for ejecting gas toward the screen,
The gas from the air diffuser causes the bubbles to collide with the carrier on the screen surface.
【０００７】[0007]
【作用】本発明によれば、処理槽内下方位置で縦目状の
スクリーンの下方領域に設けられた散気装置から前記ス
クリーンに向かって気体を噴出し、気泡と処理槽内に多
数収納された微生物を担持した担体とをスクリーンに衝
突させる。これにより、スクリーンに衝突する気泡の担
体により、スクリーンに付着した汚れが洗浄される。従
って、スクリーンに付着した汚れによる目詰まりが生じ
ないので、処理液の流出をスムーズに行うことができ
る。According to the present invention, gas is ejected toward the screen from the air diffuser provided in the lower region of the vertical screen at the lower position in the processing tank, and a large number of bubbles and the processing tank are stored. The carrier supporting the microorganisms is collided with the screen. As a result, the contaminants adhering to the screen are cleaned by the carrier of the bubbles that collide with the screen. Therefore, clogging due to dirt attached to the screen does not occur, and the processing liquid can be smoothly flowed out.
【０００８】[0008]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。図１は本発明を実施するための硝化槽を示し、図
２は図１の硝化槽を活性汚泥槽に組み入れた例を示して
いる。硝化槽１は四角容器状の硝化槽本体２の側面下部
側に縦目状のスクリーンやウェッジワイヤ等からなる流
入口３が設けられ、この側面上部には、硝化槽本体２と
傾斜板４を介して区画された上部空間部５を備えてい
る。この上部空間部５は縦目状のスクリーンやウェッジ
ワイヤ等からなる流出口６が設けられ、上部空間部５の
側面部には所定の間隔をおいて配置された２つの堰７が
設けられている。上部空間部５内には堰８が設けられる
と共にこの堰８に接続された配管９は傾斜板４及び硝化
槽本体２の側壁を貫通して槽本体外部に連通している。
また、硝化槽本体２内には、硝化細菌を担持したペレッ
ト１０が流動可能な状態で収納されている。このペレッ
ト１０として、ポリエチレングリコール等の薬品で硝化
細菌を固め、ビーズ状にしたものが有効である。また、
硝化槽本体２の底部でスクリーン等からなる流出口６の
下方領域には、散気装置１１が設置されている。このよ
うな構成からなる硝化槽１（以下、硝化槽ユニットとい
う）は、図２に示すように活性汚泥処理槽１２の一側面
に配置されて活性汚泥処理槽１２内の硝化槽１を除く内
部は嫌気槽１３を構成するようになっている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a nitrification tank for carrying out the present invention, and FIG. 2 shows an example in which the nitrification tank of FIG. 1 is incorporated into an activated sludge tank. The nitrification tank 1 has a square container-shaped nitrification tank main body 2 provided with an inlet 3 composed of a vertical screen or a wedge wire on the lower side of the side surface, and the nitrification tank main body 2 and the inclined plate 4 are provided on the upper side of the side surface. It is provided with an upper space portion 5 partitioned by the above. The upper space 5 is provided with an outflow port 6 made of a vertical screen or wedge wire, and the side walls of the upper space 5 are provided with two weirs 7 arranged at a predetermined interval. There is. A weir 8 is provided in the upper space 5, and a pipe 9 connected to the weir 8 penetrates the side wall of the inclined plate 4 and the nitrification tank body 2 and communicates with the outside of the tank body.
Further, in the nitrification tank main body 2, a pellet 10 carrying nitrifying bacteria is stored in a fluid state. As the pellet 10, it is effective to use nitrifying bacteria hardened with a chemical such as polyethylene glycol to form beads. Also,
An air diffuser 11 is installed at the bottom of the nitrification tank main body 2 in a region below the outlet 6 formed of a screen or the like. The nitrification tank 1 (hereinafter referred to as a nitrification tank unit) having such a configuration is arranged on one side of the activated sludge treatment tank 12 as shown in FIG. Constitutes an anaerobic tank 13.
【０００９】そして、嫌気槽１３と硝化槽本体２とは、
流入口３及び流出口６、堰７を介して汚水が循環可能と
なっている。尚、活性汚泥処理槽１２の底部には攪拌機
１４が設置されている。次に上記のような活性汚泥処理
槽における汚水処理法を説明する。嫌気槽１３内に供給
された汚水は、攪拌機１４により攪拌されて浮遊汚泥と
混合した後、この混合液は流入口３から硝化槽ユニット
１内に流入する。硝化槽ユニット１内では、散気装置１
１からの空気によって流動化されたペレット１０の働き
によって汚水中の窒素成分が硝化された後、混合液は上
向流によって流出口６から上部空間部５内に流出する。
上部空間部５内の混合液は、その一部が溢流堰８から配
管９を経て沈澱槽（図示せず）に送られ、残りは堰７を
通って嫌気槽１３に循環され、ここで汚水中のＢＯＤ成
分を利用して脱窒される。The anaerobic tank 13 and the nitrification tank main body 2 are
Sewage can be circulated through the inlet 3, the outlet 6, and the weir 7. A stirrer 14 is installed at the bottom of the activated sludge treatment tank 12. Next, a sewage treatment method in the activated sludge treatment tank as described above will be described. The wastewater supplied into the anaerobic tank 13 is stirred by the stirrer 14 and mixed with the floating sludge, and then the mixed liquid flows into the nitrification tank unit 1 through the inflow port 3. In the nitrification tank unit 1, the air diffuser 1
After the nitrogen component in the wastewater is nitrified by the action of the pellets 10 fluidized by the air from 1, the mixed liquid flows out from the outlet 6 into the upper space 5 by the upward flow.
Part of the mixed liquid in the upper space portion 5 is sent from the overflow weir 8 to the settling tank (not shown) via the pipe 9, and the rest is circulated to the anaerobic tank 13 through the weir 7, where It is denitrified using the BOD component in wastewater.
【００１０】このように散気装置１１を硝化槽ユニット
１の底部に、流入口３を槽側面底部側に、流出口６を傾
斜板４にそれぞれ設けることによって容易に循環流を形
成することができる。そして、この循環水量は、溢流堰
７の開口面積を調整可能な構造とすることによって調整
することができる。循環水量は汚水の流入量の１〜１０
倍、好ましくは２〜５倍となるように調整される。また
循環水量は散気装置１１より散気量を調整することによ
っても可能である。As described above, the air diffuser 11 is provided at the bottom of the nitrification tank unit 1, the inlet 3 is provided at the bottom of the side surface of the tank, and the outlet 6 is provided at the inclined plate 4, so that a circulation flow can be easily formed. it can. The amount of circulating water can be adjusted by making the opening area of the overflow weir 7 adjustable. Circulation water volume is 1 to 10 of inflow volume
It is adjusted to double, preferably 2 to 5 times. The amount of circulating water can also be adjusted by adjusting the amount of air diffused by the air diffuser 11.
【００１１】また、硝化細菌を固定化させたペレットの
場合、硝化活性の立ち上がりが速く、活性も安定し、窒
素除去効率が安定する。特に固定化する菌体として硝化
細菌を含む活性汚泥を一旦馴養して硝化細菌の濃度を高
めたものを固定すると、硝化活性の立ち上がりが速い
が、採取した汚泥をそのまま用いても汚泥を高濃度に固
定できるため、比較的早期に硝化活性の立ち上がりが認
められる。Further, in the case of pellets on which nitrifying bacteria are immobilized, the nitrification activity rises quickly, the activity is stable, and the nitrogen removal efficiency is stable. In particular, when activated sludge containing nitrifying bacteria is once acclimated as the cells to be immobilized and the concentration of nitrifying bacteria is increased, the nitrification activity rises quickly, but even if the collected sludge is used as it is, the sludge has a high concentration. Since it can be fixed to the, the rise of nitrification activity is recognized relatively early.
【００１２】図３は活性汚泥処理槽内に配置される硝化
槽ユニットの他の実施例を示す斜視図、図４は図３の硝
化槽ユニットを活性汚泥処理槽内に配置した状態を示す
断面図である。この硝化槽ユニット２１は、硝化槽本体
２２の内部が仕切板２３によって下部側が連通した状態
で２つに区画されている。硝化槽本体２２の一側面に流
入口２４が設けられ、この流入口２４が設けられた槽本
体側面と反対側の側面側に傾斜板２５が配置されて上部
空間部２６が構成されている。傾斜板２５には、スクリ
ーンやウェッジワイヤ等からなる流出口２７が形成さ
れ、上部空間部２６とその下部側の槽内部が連通可能と
なっている。そして、上部空間部２６には１つあるいは
複数の水路、本図においては一対の水路２８が設けられ
いる。硝化槽ユニット２１には、前記実施例同様に散気
装置２９が設置されると共に硝化槽本体２２内には硝化
細菌を固定化させたペレット３０が流動可能な状態で収
納されている。FIG. 3 is a perspective view showing another embodiment of the nitrification tank unit arranged in the activated sludge treatment tank, and FIG. 4 is a sectional view showing a state in which the nitrification tank unit of FIG. 3 is arranged in the activated sludge treatment tank. It is a figure. The nitrification tank unit 21 is divided into two parts with the inside of the nitrification tank main body 22 being in communication with the lower side by a partition plate 23. An inflow port 24 is provided on one side surface of the nitrification tank main body 22, and an inclined plate 25 is arranged on a side surface side opposite to the side surface of the tank main body on which the inflow port 24 is provided to form an upper space portion 26. The inclined plate 25 has an outlet 27 formed of a screen, a wedge wire, or the like so that the upper space portion 26 and the inside of the tank on the lower side can communicate with each other. The upper space portion 26 is provided with one or a plurality of water channels, a pair of water channels 28 in this figure. An air diffuser 29 is installed in the nitrification tank unit 21 as in the above embodiment, and pellets 30 on which nitrifying bacteria are immobilized are stored in the nitrification tank main body 22 in a fluid state.
【００１３】このような構成からなる硝化槽ユニット２
１は、図４に示すように活性汚泥処理槽３１の一側面部
に配置されて、硝化槽ユニット２１を除く槽内部は嫌気
槽３２を構成し、嫌気槽３２には、攪拌機３３が設置さ
れている。なお、３４は流量調整装置を示している。こ
の活性汚泥処理槽では、流入口２４が水面に近い水面下
に配置されており、仕切板２３の下端部が槽の深部にま
で達している。このため、流入口２４から硝化槽ユニッ
ト２１内に流入した汚水と活性汚泥との混合液は、下向
流となって流れる。従って、流入口２４からペレット３
０が流出することがなく、このため、流入口２４はスク
リーンやウェッジワイヤ等が不要となる。The nitrification tank unit 2 having such a structure
As shown in FIG. 4, 1 is arranged on one side surface of the activated sludge treatment tank 31, and the inside of the tank excluding the nitrification tank unit 21 constitutes an anaerobic tank 32, and the anaerobic tank 32 is provided with a stirrer 33. ing. In addition, 34 has shown the flow control device. In this activated sludge treatment tank, the inflow port 24 is arranged below the water surface close to the water surface, and the lower end portion of the partition plate 23 reaches the deep portion of the tank. Therefore, the mixed liquid of sewage and activated sludge that has flowed into the nitrification tank unit 21 through the inflow port 24 flows in a downward flow. Therefore, from the inlet 24 to the pellet 3
Since 0 does not flow out, the inlet 24 does not require a screen, wedge wire, or the like.
【００１４】また、流出口２７は傾斜板２５に形成され
ており、下方から上昇する空気とペレット３０がスクリ
ーンやウェッジワイヤ等からなる流出口２７の面に衝突
し、スクリーンやウェッジワイヤ等に付着する汚れを洗
浄する結果、目詰まりが解消され、逆洗等の操作を要し
ない。流出口２７から流出した混合液は、水路２８を通
って嫌気槽３２に循環される。従って、硝化槽ユニット
２１から混合液は、水路２８によって嫌気槽３２内にお
ける脱窒効果の高い汚水流入部付近に循環される。尚、
水路２８には堰（図示せず）を設け、混合液の循環量を
調整するようにしてもよい。Further, the outlet 27 is formed in the inclined plate 25, and the air rising from below and the pellet 30 collide with the surface of the outlet 27 composed of the screen, wedge wire, etc., and adhere to the screen, wedge wire, etc. As a result of cleaning the dirt, clogging is eliminated and backwashing or the like is not required. The mixed liquid flowing out from the outlet 27 is circulated to the anaerobic tank 32 through the water channel 28. Therefore, the mixed liquid from the nitrification tank unit 21 is circulated in the anaerobic tank 32 by the water channel 28 in the vicinity of the sewage inflow portion having a high denitrification effect. still,
A weir (not shown) may be provided in the water channel 28 to adjust the circulation amount of the mixed liquid.
【００１５】図５は本発明を実施する活性汚泥処理槽の
他の実施例を示す要部切欠斜視図である。この活性汚泥
処理槽は、大型の活性汚泥処理槽５１内に図３に示す硝
化槽ユニット２１を所定の間隔をおいて配置すると共に
硝化槽ユニット２１ａの外側面と活性汚泥処理槽５１の
内側面との間にそれぞれの嫌気槽５２ａ、５２ｂに連通
する間隙部５３ａを形成している。また、５４は前記流
入口２４に相当する堰である。従って、図５において、
図３及び図４と同一構成部は同一符号で示し、構成上の
説明は省略する。FIG. 5 is a cutaway perspective view showing a main part of another embodiment of the activated sludge treatment tank for carrying out the present invention. In this activated sludge treatment tank, the nitrification tank unit 21 shown in FIG. 3 is arranged at a predetermined interval in a large activated sludge treatment tank 51, and the outer surface of the nitrification tank unit 21 a and the inner surface of the activated sludge treatment tank 51. And a gap portion 53a communicating with the anaerobic tanks 52a and 52b are formed between and. Further, 54 is a weir corresponding to the inflow port 24. Therefore, in FIG.
The same components as those in FIG. 3 and FIG.
【００１６】この活性汚泥処理槽５１においては、汚水
は、図中の左端により流入し、第１槽目の嫌気槽５２ａ
の汚水と活性汚泥の混合液は、その一部が第１槽目の硝
化槽ユニット２１ａに流入し、残りは間隙部５３ａを通
って第２槽目の嫌気槽５２ｂに流入する。嫌気槽５２ｂ
の混合液は同様に、その一部が第２槽目の硝化槽ユニッ
ト２１ｂに流入し、残りは間隙部５３ｂを通って次段工
程に流入する。In the activated sludge treatment tank 51, the sewage flows in at the left end in the figure, and the first anaerobic tank 52a.
Part of the mixed liquid of sewage and activated sludge flows into the nitrification tank unit 21a of the first tank, and the rest flows into the anaerobic tank 52b of the second tank through the gap 53a. Anaerobic tank 52b
Similarly, a part of the mixed liquid flows into the nitrification tank unit 21b of the second tank, and the rest flows into the next step through the gap 53b.
【００１７】尚、図５に示す硝化槽ユニット２１の代わ
りに図１に示す硝化槽ユニット１を活性汚泥処理槽５１
内に配置してもよい。図６は硝化槽ユニットの他の実施
例を示す斜視図である。この硝化槽ユニット６１は、槽
本体の一側面下部側にスクリーンやウェッジワイヤ等か
らなる流入口６２が設けられ、この側面の上部側は槽内
部側の傾斜した傾斜面を有し、この傾斜面にスクリーン
やウェッジワイヤ等からなる流出口６３が設けられてい
る。硝化槽ユニット６１内にペレットが収納され、また
散気装置を有する点は前記した実施例と同様である。The nitrification tank unit 1 shown in FIG. 1 is replaced by the nitrification tank unit 21 shown in FIG.
It may be placed inside. FIG. 6 is a perspective view showing another embodiment of the nitrification tank unit. This nitrification tank unit 61 is provided with an inflow port 62 composed of a screen, a wedge wire, etc. on the lower side of one side surface of the tank body, and the upper side of this side surface has an inclined surface on the inside of the tank. An outflow port 63 including a screen, a wedge wire, and the like is provided in the. The point that pellets are stored in the nitrification tank unit 61 and that an air diffuser is provided is the same as in the above-described embodiment.
【００１８】この硝化槽ユニット６１は、前記した実施
例同様に活性汚泥処理槽内に配置される。図７は図５に
おける硝化槽ユニットの拡大詳細図、図８は硝化槽ユニ
ットの更に他の実施例を示す要部切欠斜視図である。図
８において、図７に示す硝化槽ユニットと異なる点は、
上部が開口し、断面図矩形状の水路２８の代わりに配管
からなる水路８１が配設されている点が異なっている。
８２は流量計であり、この流量計８２の指示値に基づ
き、流量調整弁３５の開度を調節する。図８における硝
化槽ユニットも図３に示す硝化槽ユニットと同様にして
活性汚泥処理槽内に配置される。尚、硝化槽ユニットか
ら脱窒槽に循環させる水路あるいは配管は単数でもある
いは２本以上でもよい。The nitrification tank unit 61 is arranged in the activated sludge treatment tank as in the above-mentioned embodiment. FIG. 7 is an enlarged detailed view of the nitrification tank unit in FIG. 5, and FIG. 8 is a cutaway perspective view of a main part showing still another embodiment of the nitrification tank unit. 8 is different from the nitrification tank unit shown in FIG.
The difference is that an upper part is opened and a water channel 81 made of a pipe is provided instead of the water channel 28 having a rectangular cross-sectional view.
Reference numeral 82 denotes a flow meter, which adjusts the opening degree of the flow rate adjusting valve 35 based on the instruction value of the flow meter 82. The nitrification tank unit in FIG. 8 is also arranged in the activated sludge treatment tank in the same manner as the nitrification tank unit shown in FIG. Incidentally, the number of water channels or pipes circulating from the nitrification tank unit to the denitrification tank may be one or two or more.
【００１９】図９は本発明の硝化槽ユニットの更に他の
実施例を示す斜視図、図１０は図９の硝化槽ユニットを
用いた活性汚泥処理槽における汚水の流れ状態を示す説
明図である。この硝化槽ユニットは、その上部にスクリ
ーンやウェッジワイヤ等からなる流出口９１が設けられ
ており、この流出口９１の一端部側に流量制御装置９２
を備えた水路９３が設けられている。硝化槽ユニットは
活性汚泥処理槽の内周面と間隙部を有する状態で配置さ
れ、流出口９１が形成された面側と反対側の面には、硝
化槽ユニットの側面との所定の間隔をおいて、溢流堰９
４が形成された仕切板９５が配置される。FIG. 9 is a perspective view showing still another embodiment of the nitrification tank unit of the present invention, and FIG. 10 is an explanatory view showing the flow state of wastewater in the activated sludge treatment tank using the nitrification tank unit of FIG. . This nitrification tank unit is provided with an outflow port 91 composed of a screen, a wedge wire, etc. on the upper part thereof, and a flow rate control device 92 is provided at one end side of this outflow port 91.
A water channel 93 is provided. The nitrification tank unit is arranged so as to have a gap with the inner peripheral surface of the activated sludge treatment tank, and a predetermined distance from the side surface of the nitrification tank unit is provided on the surface opposite to the surface where the outlet 91 is formed. Overflow weir 9
A partition plate 95 on which 4 is formed is arranged.
【００２０】嫌気槽９８内の混合液は硝化槽ユニットと
活性汚泥処理槽との間隙部９７を経て、硝化槽ユニット
後段下部に設けられた流入口９９より硝化槽ユニット内
に流入し、散気装置（図示せず）からの空気とペレット
９６が収納された内で硝化処理された後、流出口９１か
ら水路９３を経て嫌気槽に循環され、間隙部９７を経
て、溢流堰９４から次工程（例えば、次段の嫌気槽）に
供給される。The mixed liquid in the anaerobic tank 98 flows through the gap 97 between the nitrification tank unit and the activated sludge treatment tank into the nitrification tank unit through the inflow port 99 provided at the lower rear part of the nitrification tank unit to diffuse air. After air and pellets 96 from a device (not shown) are stored, nitrification treatment is performed, and then the air is circulated from the outlet 91 to the anaerobic tank via the water passage 93, to the gap 97, and then to the overflow weir 94. It is supplied to the process (for example, the anaerobic tank in the next stage).
【００２１】図１１及び図１２はそれぞれ本発明を実施
するための活性汚泥処理槽の他の実施例を示す概略的構
成図である。図１１において、硝化ユニット１００から
の硝化液循環導水管１０１には流量調整装置１０２が配
設され、この硝化液循環導水管１０１の先端部には、嫌
気槽内に設置された攪拌機１０３の付近に位置してい
る。また、図１２において、硝化ユニット１００からの
硝化液循環導水管１０１には流量調整装置１０２が配設
され、この硝化液循環導水管１０１の先端部は攪拌機１
０３の吸引口付近に位置している。FIG. 11 and FIG. 12 are schematic configuration diagrams showing another embodiment of the activated sludge treatment tank for carrying out the present invention. In FIG. 11, a flow rate adjusting device 102 is arranged in the nitrification liquid circulation water pipe 101 from the nitrification unit 100, and the tip of the nitrification liquid circulation water pipe 101 is near the stirrer 103 installed in the anaerobic tank. Is located in. Further, in FIG. 12, a flow rate adjusting device 102 is arranged in the nitrification solution circulating water guiding pipe 101 from the nitrification unit 100, and the tip portion of this nitrification liquid circulating water guiding pipe 101 has a stirrer 1
It is located near the suction port of 03.
【００２２】図１１及び図１２においては、硝化液の循
環が効率的に行われると共に嫌気槽での硝化液の混合が
促進され、脱窒反応効率が向上する。特に図１２に示す
実施例では、図１３に示すように水中ポンプの原理を利
用した攪拌機１０３によって吸込口１０３ａ付近に硝化
液循環導水管１０１の先端開口部を位置しており、硝化
液はインペラ１０３ｂによる回転に伴う揚水効果で吐出
口１０３ｃから吐出される。従って、硝化液の循環と攪
拌が効率的となる。また、攪拌機１０３は水中ポンプ等
の揚水装置でよい。また、攪拌機１０３あるいは水中ポ
ンプ等の揚水装置を用いた上記方法は図８に示した硝化
ユニット槽においても適用が可能である。In FIG. 11 and FIG. 12, the nitrification solution is efficiently circulated and the mixing of the nitrification solution in the anaerobic tank is promoted to improve the denitrification reaction efficiency. In particular, in the embodiment shown in FIG. 12, the tip end opening of the nitrifying solution circulation conduit 101 is located near the suction port 103a by the agitator 103 utilizing the principle of the submersible pump as shown in FIG. It is discharged from the discharge port 103c by the pumping effect accompanying the rotation by 103b. Therefore, the circulation and stirring of the nitrification liquid becomes efficient. Further, the agitator 103 may be a pumping device such as a submersible pump. Further, the above method using the pumping device such as the agitator 103 or the submersible pump can be applied to the nitrification unit tank shown in FIG.
【００２３】前記した例は本発明の実施例を示したもの
であり、要は本発明における硝化槽ユニットは活性汚泥
処理槽内に投入するのみで配置できる構造を有し、内部
にペレットを収納している場合、内部の液流動時にペレ
ットが硝化槽ユニット外部に漏出しない構造があればよ
い。上記したスクリーン又はウェッジワイヤ等の目開き
は、ペレットの大きさ等との関係によって設定される
が、ペレットが１．５〜４mmの場合、目開きは、通常、
０．５〜１．５mm程度が望ましい。The above-mentioned example shows an embodiment of the present invention. The point is that the nitrification tank unit of the present invention has a structure that can be arranged only by throwing it into the activated sludge treatment tank, and the pellets are stored inside. In this case, it is sufficient that the pellets do not leak outside the nitrification tank unit when the liquid flows inside. The opening of the above-mentioned screen or wedge wire is set depending on the relationship with the size of the pellet, but when the pellet is 1.5 to 4 mm, the opening is usually
About 0.5 to 1.5 mm is desirable.
【００２４】[0024]
【発明の効果】以上説明したように、本発明の汚水の処
理装置によれば、処理槽内下方位置でスクリーンの下方
領域に設けられた散気装置からスクリーンに向かって気
体を噴出し、気泡と処理槽内に収納された多数の担体と
をスクリーンに衝突させてスクリーンに付着した汚れを
洗浄するようにした。これにより、スクリーンに付着し
た汚れによる目詰まりが生じないので、処理液の流出を
スムーズに行うことができる。従って、生物処理の効率
を向上させることができると共に、スクリーンを逆洗す
る逆洗装置等を別設で設ける必要がないので、装置価格
を安価にできると共に、装置を簡素化できる。As described above, according to the sewage treatment apparatus of the present invention, gas is jetted toward the screen from the air diffuser provided in the lower region of the screen at the lower position in the treatment tank, and bubbles are generated. And a large number of carriers stored in the processing tank were made to collide with the screen to clean the dirt adhering to the screen. As a result, clogging due to dirt attached to the screen does not occur, so that the processing liquid can be smoothly flowed out. Therefore, the efficiency of biological treatment can be improved, and since it is not necessary to separately provide a backwashing device for backwashing the screen, the cost of the device can be reduced and the device can be simplified.
【図１】図１は本発明を実施するための硝化槽ユニット
の実施例を示す斜視図FIG. 1 is a perspective view showing an embodiment of a nitrification tank unit for carrying out the present invention.
【図２】図２は図１の硝化槽ユニットを活性汚泥処理槽
に組み入れた例を示す断面図FIG. 2 is a sectional view showing an example in which the nitrification tank unit of FIG. 1 is incorporated into an activated sludge treatment tank.
【図３】図３は本発明を実施するための硝化槽ユニット
の実施例を示す斜視図FIG. 3 is a perspective view showing an embodiment of a nitrification tank unit for carrying out the present invention.
【図４】図４は図２の硝化槽ユニットを活性汚泥処理槽
に組み入れた例を示す断面図FIG. 4 is a sectional view showing an example in which the nitrification tank unit of FIG. 2 is incorporated into an activated sludge treatment tank.
【図５】図５は本発明を実施するための活性汚泥処理槽
の実施例を示す要部切欠斜視図FIG. 5 is a cutaway perspective view of essential parts showing an embodiment of an activated sludge treatment tank for carrying out the present invention.
【図６】図６は硝化槽ユニットの他の実施例を示す斜視
図FIG. 6 is a perspective view showing another embodiment of the nitrification tank unit.
【図７】図７は図５における硝化槽ユニットの拡大詳細
図FIG. 7 is an enlarged detailed view of the nitrification tank unit in FIG.
【図８】図８は硝化槽ユニットの更に他の実施例を示す
要部切欠斜視図FIG. 8 is a cutaway perspective view of a main part showing still another embodiment of the nitrification tank unit.
【図９】図９は硝化槽ユニットの更に他の実施例を示す
斜視図FIG. 9 is a perspective view showing still another embodiment of the nitrification tank unit.
【図１０】図１０は図９の硝化槽ユニットを用いた活性
汚泥処理槽における汚水の流れ状態を示す説明図10 is an explanatory diagram showing a flow state of wastewater in an activated sludge treatment tank using the nitrification tank unit of FIG. 9.
【図１１】図１１は本発明を実施するための活性汚泥処
理槽の概略的構成図FIG. 11 is a schematic configuration diagram of an activated sludge treatment tank for carrying out the present invention.
【図１２】図１２は本発明を実施するための活性汚泥処
理槽の更に他の実施例を示す概略構成図FIG. 12 is a schematic configuration diagram showing still another embodiment of the activated sludge treatment tank for carrying out the present invention.
【図１３】図１３は図１２の要部拡大原理説明図FIG. 13 is an explanatory view of an enlarged principle of a main part of FIG.
１、２１、６１、１００…硝化槽ユニット ３、２４…流入口 ４、２５…傾斜板 ６、２７、６２、９１…流出口 ７、８、５４、９４…堰 ２８…水路 ８１…硝化液導入水管 １０、３０、９６…ペレット １１、２９…散気装置 １３、３２、５２ａ、５２ｂ…嫌気槽 １４、３３、１０３…攪拌機。 1, 21, 61, 100 ... Nitrification tank unit 3, 24 ... Inflow port 4, 25 ... Inclined plate 6, 27, 62, 91 ... Outflow port 7, 8, 54, 94 ... Weir 28 ... Water channel 81 ... Nitrification liquid introduction Water tube 10, 30, 96 ... Pellet 11, 29 ... Air diffuser 13, 32, 52a, 52b ... Anaerobic tank 14, 33, 103 ... Stirrer.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小池 秀三 埼玉県浦和市南浦和３−22−13 (72)発明者 川口 幸男 大阪府高槻市古曽部町２−10−10 (72)発明者 水口 保 東京都千代田区内神田１丁目１番14号 日 立プラント建設株式会社内 (72)発明者 江森 弘祥 東京都千代田区内神田１丁目１番14号 日 立プラント建設株式会社内 (72)発明者 森 直道 東京都千代田区内神田１丁目１番14号 日 立プラント建設株式会社内 (72)発明者 山寺 利夫 東京都千代田区内神田１丁目１番14号 日 立プラント建設株式会社内 (72)発明者 堀田 正見 東京都千代田区内神田１丁目１番14号 日 立プラント建設株式会社内 (72)発明者 中村 裕紀 東京都千代田区内神田１丁目１番14号 日 立プラント建設株式会社内 (72)発明者 角野 立夫 東京都千代田区内神田１丁目１番14号 日 立プラント建設株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuzo Koike 3-22-13 Minamiurawa, Urawa-shi, Saitama (72) Inventor Yukio Kawaguchi 2-10-10 Kozobe-cho, Takatsuki-shi, Osaka (72) Inventor Mizuguchi Ho In 1-114 Uchikanda, Chiyoda-ku, Tokyo Inside Hirit Plant Construction Co., Ltd. (72) Inventor Hiroyoshi Emori 1-1-14, Uchikanda, Chiyoda-ku, Tokyo In Hirit Plant Construction Co., Ltd. (72) Inventor Naomichi Mori, 1-14-14 Kanda, Chiyoda-ku, Tokyo, Japan Hiratsugi Construction Co., Ltd. (72) Inventor Toshio Yamadera 1-1-14, Uchikanda, Chiyoda-ku, Tokyo Hitochi Plant Construction Co., Ltd. ( 72) Inventor Masami Horita 1-1-14 Kanda, Uchikanda, Chiyoda-ku, Tokyo Within Hitachi Plant Construction Co., Ltd. (72) Inventor Yuki Nakamura 1-1-1, Uchikanda, Chiyoda-ku, Tokyo No. 14 Inside Hiritto Plant Construction Co., Ltd. (72) Inventor Tatsuo Tsunono 1-1-14, Kanda, Uchida, Chiyoda-ku, Tokyo Inside Hiritto Plant Construction Co., Ltd.
Claims (1)
理装置に於いて、 前記有機性汚水が流入する処理槽と、 前記処理槽内に多数収納されて前記生物学的処理を行う
微生物を担持した担体と、 前記処理槽上部に該処理槽の内側に傾斜して設けられ、
処理液の流出口を形成すると共に前記担体を分離する縦
目状のスクリーンと、 前記処理槽内下方位置で前記スクリーンの下方領域に設
けられ、前記スクリーンに向かって気体を噴出する散気
装置と、 から成り、前記散気装置からの気体により前記スクリー
ン面に気泡と前記担体とを衝突させることを特徴とする
汚水の処理装置。1. A sewage treatment apparatus for biologically treating organic sewage, comprising: a treatment tank into which the organic sewage flows; and a plurality of treatment tanks for performing the biological treatment. A carrier carrying microorganisms, and is provided on the upper part of the processing tank with an inclination inside the processing tank,
A vertical screen that forms a processing liquid outlet and separates the carrier, and an air diffuser that is provided in the lower region of the screen at a lower position in the processing tank and that jets gas toward the screen. The device for treating sewage, characterized in that the bubbles from the carrier collide with the carrier by the gas from the air diffuser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6158698A JP2579122B2 (en) | 1994-07-11 | 1994-07-11 | Wastewater treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6158698A JP2579122B2 (en) | 1994-07-11 | 1994-07-11 | Wastewater treatment equipment |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1037057A Division JPH02214597A (en) | 1989-02-16 | 1989-02-16 | Device for nitrifying sewage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0747390A true JPH0747390A (en) | 1995-02-21 |
| JP2579122B2 JP2579122B2 (en) | 1997-02-05 |
Family
ID=15677409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6158698A Expired - Lifetime JP2579122B2 (en) | 1994-07-11 | 1994-07-11 | Wastewater treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2579122B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1369156A1 (en) * | 2001-02-01 | 2003-12-10 | Suikenkikou Co Ltd | Aeration type underwater screen system |
| CN102701431A (en) * | 2012-05-31 | 2012-10-03 | 国家城市给水排水工程技术研究中心 | Air water self cleaning type backflow sludge grating |
| JP2020138185A (en) * | 2019-03-01 | 2020-09-03 | オルガノ株式会社 | Biological treatment apparatus |
| WO2021102484A1 (en) * | 2019-11-21 | 2021-05-27 | Organo (Vietnam) Co., Ltd. | Biological treatment apparatus, carrier capturing device for biological treatment apparatus, water treatment method and method of modifying biological treatment apparatus |
| CN114667270A (en) * | 2019-11-21 | 2022-06-24 | 奥加诺株式会社 | Biological treatment apparatus, carrier capturing apparatus for biological treatment apparatus, water treatment method, and modification method for biological treatment apparatus |
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| JPS62110717A (en) * | 1985-11-08 | 1987-05-21 | Suiken Kiko:Kk | Pretreatment in sanitary sewage treatment facility |
| JPH02214597A (en) * | 1989-02-16 | 1990-08-27 | Hitachi Plant Eng & Constr Co Ltd | Device for nitrifying sewage |
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1994
- 1994-07-11 JP JP6158698A patent/JP2579122B2/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62110717A (en) * | 1985-11-08 | 1987-05-21 | Suiken Kiko:Kk | Pretreatment in sanitary sewage treatment facility |
| JPH02214597A (en) * | 1989-02-16 | 1990-08-27 | Hitachi Plant Eng & Constr Co Ltd | Device for nitrifying sewage |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1369156A1 (en) * | 2001-02-01 | 2003-12-10 | Suikenkikou Co Ltd | Aeration type underwater screen system |
| EP1369156A4 (en) * | 2001-02-01 | 2004-10-13 | Suikenkikou Co Ltd | Aeration type underwater screen system |
| CN102701431A (en) * | 2012-05-31 | 2012-10-03 | 国家城市给水排水工程技术研究中心 | Air water self cleaning type backflow sludge grating |
| JP2020138185A (en) * | 2019-03-01 | 2020-09-03 | オルガノ株式会社 | Biological treatment apparatus |
| WO2021102484A1 (en) * | 2019-11-21 | 2021-05-27 | Organo (Vietnam) Co., Ltd. | Biological treatment apparatus, carrier capturing device for biological treatment apparatus, water treatment method and method of modifying biological treatment apparatus |
| CN114667270A (en) * | 2019-11-21 | 2022-06-24 | 奥加诺株式会社 | Biological treatment apparatus, carrier capturing apparatus for biological treatment apparatus, water treatment method, and modification method for biological treatment apparatus |
| JP2022549249A (en) * | 2019-11-21 | 2022-11-24 | オルガノ株式会社 | Biological treatment device, carrier capture device for biological treatment device, water treatment method, and modification method for biological treatment device |
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| JP2579122B2 (en) | 1997-02-05 |
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