JPS6147156B2 - - Google Patents
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- Publication number
- JPS6147156B2 JPS6147156B2 JP9112178A JP9112178A JPS6147156B2 JP S6147156 B2 JPS6147156 B2 JP S6147156B2 JP 9112178 A JP9112178 A JP 9112178A JP 9112178 A JP9112178 A JP 9112178A JP S6147156 B2 JPS6147156 B2 JP S6147156B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- raw water
- aerobic
- tanks
- outlets
- 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
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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】
本発明は、単一の槽にて押出し流れ状態と完全
混合状態とを適宜設定でき、かつ好気状態、嫌気
状態を適宜設定できる下水その他の排水を処理す
る排水処理槽に関するもので、この排水処理槽を
２槽以上用いて、流入槽、流出槽を交互に切り換
え、槽内の役割を好気槽、嫌気槽、沈殿槽として
働かすのに適した排水処理槽を提供せんとするも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a wastewater treatment system for treating sewage and other wastewater that can appropriately set an extrusion flow state and a complete mixing state in a single tank, and can appropriately set an aerobic state and an anaerobic state. Regarding tanks, two or more of these wastewater treatment tanks are used, and the inflow tank and outflow tank are alternately switched, and the tank is suitable for functioning as an aerobic tank, an anaerobic tank, and a sedimentation tank. This is what we intend to provide.
従来、排水処理方法の主流は好気的微生物群を
主に用いた活性汚泥法、散水ろ床法、回転円板
法、オキシデイシヨンデイツチ法などによる
BOD成分、COD成分のみの除去方法であつた。
しかしながら、10年程前より排水中に含まれてい
る窒素化合物が河川、湖沼、港湾における富栄養
化現象の一要因と考えられるようになり、窒素化
合物の除去が重要であると考えられてきた。この
ため種々の脱窒素方法が提案されてきた。現在ま
でに、物理化学的にNH3ガス、NH＋ ４、NO− ３として
水系から除去する方法、生物学的に菌体蛋白とし
て回収する方法、N2ガスとして無害化除去する
方法などが報告されている。これらの方法のうち
現在では、窒素化合物の自然界における循環を考
慮した場合、N2ガスとして大気中に還元する方
向が無理のない姿であるという考えから、生物学
的硝化脱窒素法が主に実験室的規模あるいは実際
規模の装置で種々検討されている。ここでいう生
物学的硝化脱窒素法とは、微生物群の働きにより
好気的条件下でNH3態あるいは有機態ＮをNO3態
Ｎに変換させ、その後同様に微生物群の働きを利
用して嫌気的条件下でNO3態ＮをN2ガスにまで変
換させる方法のことであり、種々のプロセスが提
案されてきている。したがつて生物学的硝化脱窒
素法を実施するためには、好気的条件と嫌気的条
件の設定が不可欠である。現在、一般式に実施あ
るいは計画されている脱窒を含む排水処理法プロ
セスでは、好気的条件を設定できる槽（BOD成
分除去槽および硝化槽）と嫌的条件を設定できる
槽（脱窒槽）とさらに沈殿槽と合計４〜６槽が必
要となる。最近この欠点を改良した方法がデンマ
ークにおいて開発され、我国においても特許出願
されている（特願昭48−76452号、特開昭49−
51767号）。この方法は、３槽を利用して流出槽、
流入槽を種々切り換え、各槽に好気的条件設定と
嫌気的条件設定と沈殿槽としての役割とをそれぞ
れ交互に実施させて、BOD成分除去、脱窒を３
槽のみで実施するものである。この場合、槽の形
式をオキシデイシヨンデイツチにすることによ
り、好気槽、嫌気槽、沈殿槽の三役を一つの槽で
実施させている。ここで３槽とも従来方式の塔型
槽を用いると、沈殿槽としての働きを実施させる
ことが困難であり、したがつて我国での実施にあ
たつては、土地面積の関係で２槽と単独沈殿槽と
の組合せをしなければならない。しかしながら本
発明によれば、３槽とも塔形式をとることが可能
となる。 Traditionally, the mainstream wastewater treatment methods have been the activated sludge method, trickling filter method, rotating disk method, oxidation date method, etc., which mainly use aerobic microorganisms.
This was a method for removing only BOD and COD components.
However, since about 10 years ago, nitrogen compounds contained in wastewater have been considered to be a factor in the eutrophication phenomenon in rivers, lakes, and ports, and the removal of nitrogen compounds has been considered important. . For this reason, various denitrification methods have been proposed. To date, methods have been reported including physicochemical methods for removing it from water systems as NH 3 gas, NH + 4 , and NO - 3 , methods for biologically recovering it as bacterial protein, and methods for detoxifying and removing it as N 2 gas. has been done. Among these methods, biological nitrification and denitrification methods are currently the main method, based on the idea that when considering the circulation of nitrogen compounds in nature, it is natural to reduce them to the atmosphere as N2 gas. Various studies have been conducted using laboratory-scale or actual-scale devices. The biological nitrification and denitrification method referred to here refers to the conversion of NH3 or organic N to NO3 under aerobic conditions by the action of microorganisms, and then using the action of the microorganisms in the same way. This is a method of converting NO 3 to N 2 gas under anaerobic conditions, and various processes have been proposed. Therefore, in order to carry out the biological nitrification and denitrification method, it is essential to establish aerobic conditions and anaerobic conditions. Currently, in the wastewater treatment process that includes denitrification that is generally implemented or planned, there are tanks that can set aerobic conditions (BOD component removal tank and nitrification tank) and tanks that can set aversive conditions (denitrification tank). In addition, a total of 4 to 6 tanks including a settling tank are required. Recently, a method to improve this drawback was developed in Denmark, and a patent application has been filed in Japan (Japanese Patent Application No. 76452/1983, Japanese Patent Application No. 49/1989)
No. 51767). This method uses three tanks: an outflow tank,
By switching between various inflow tanks and having each tank alternately set aerobic conditions, set anaerobic conditions, and serve as a sedimentation tank, BOD component removal and denitrification can be achieved in three ways.
This is carried out only in the tank. In this case, by using an oxidation tank as the tank type, one tank can function as an aerobic tank, an anaerobic tank, and a sedimentation tank. If conventional tower-type tanks were used for all three tanks, it would be difficult to make them work as a settling tank. Therefore, in Japan, due to the land area, two tanks and two tanks were used. Must be combined with a separate settling tank. However, according to the present invention, all three tanks can be in the form of a column.
上記の諸点に鑑み、本発明者らは１槽にて好気
槽、嫌気槽、沈殿槽の三つの役割を経済的に実施
できる槽を開発するならば、３槽を使用するだけ
でBOD成分除去、COD成分除去、脱窒を可能な
らしめることができると考え、１槽にて好気的条
件の設定、嫌気的条件の設定、沈殿槽としての役
割を有する槽の開発に取り組み、原水吹出し口の
位置、面積、吹出し方向をそれぞれ以下に詳述す
る如く適切にとることにより、１槽にて三つの役
割を持たせることに成功し、本発明を完成するに
至つたのである。すなわち、本発明の排水処理槽
は、原水入口を少なくとも２個有し、上部に排出
口を有する槽において、原水入口の少なくとも１
個を槽側面に設け、原水入口の少なくとも１個を
槽底部または槽下部に原水吹出し口が上向きにな
るように設け、槽側面に設けた原水入口に通じる
原水供給管に空気導入管または酸素導入管を空気
または酸素を導入・遮断可能に接続し、さらに槽
底部または槽下部に設けた原水吹出し口の合計面
積が、槽側面に設けた原水吹出し口の合計面積よ
り大きくなるように両原水吹出し口を設け、槽側
面に設けた原水入口と、槽底部または槽下部に設
けた原水入口とを原水供給管に切換可能に接続し
てなるものである。 In view of the above points, if the present inventors develop a tank that can economically perform the three roles of an aerobic tank, an anaerobic tank, and a sedimentation tank in one tank, the BOD concentration can be reduced by using only three tanks. We believe that it is possible to remove COD components, remove COD components, and denitrify, and we have developed a tank that can set aerobic conditions, set anaerobic conditions, and function as a sedimentation tank in one tank. By appropriately adjusting the position, area, and blowing direction of the mouth as described in detail below, they were able to successfully provide one tank with three roles, thereby completing the present invention. That is, the wastewater treatment tank of the present invention has at least two raw water inlets, and in a tank having a discharge port at the top, at least one of the raw water inlets has at least two raw water inlets.
At least one raw water inlet is installed at the bottom of the tank or at the bottom of the tank so that the raw water outlet faces upward, and an air introduction pipe or oxygen is introduced into the raw water supply pipe leading to the raw water inlet located on the side of the tank. The pipes are connected so that air or oxygen can be introduced and shut off, and both raw water outlets are connected so that the total area of the raw water outlets installed at the bottom of the tank or the lower part of the tank is larger than the total area of the raw water outlets installed on the side of the tank. A raw water inlet provided on the side of the tank and a raw water inlet provided at the bottom or lower part of the tank are switchably connected to a raw water supply pipe.
以下、本発明の構成を図面に示す実施態様に基
づいて説明する。第１図において、１は塔型の槽
で、この槽１の側面に少なくとも１個（図面にお
いては一例として３個）の原水入口２ａ，２ｂ，
２ｃを設け、槽１の底部に少なくとも１個（図面
においては一例として４個）の原水入口３ａ，３
ｂ，３ｃ，３ｄを各原水吹出し口４ａ，４ｂ，４
ｃ，４ｄが上向きになるように設ける。なお原水
入口を槽底部に設ける代りに、槽下部に設けても
差し支えない。槽側面の原水入口２ａ，２ｂ，２
ｃには原水吹出し口５ａ，５ｂ，５ｃが設けら
れ、これらの原水吹出し口５ａ，５ｂ，５ｃの方
向は槽１の法線に対し、０゜〜90゜の角度を有す
るように設置される。図面においては槽側面の原
水吹出し口の数が３個の場合を示しているが、望
ましくは３個以上にし、槽の上下方向、左右方向
にバラツキをもつてそれぞれ設置するのが望まし
く、吹出し方向も水平面、鉛直面に対してそれぞ
れ異なつた角度を有するよう設備するのが望まし
い。さらに槽底部に設けた原水吹出し口４ａ，４
ｂ，４ｃ，４ｄの合計開口面積Ａが、槽側面に設
けた原水吹出し口５ａ，５ｂ，５ｃの合計開口面
積Ｂより大きくなるように両原水吹出し口が設け
られている。また槽側面に設けた原水入口２ａ，
２ｂ，２ｃと、槽底部に設けた原水入口３ａ，３
ｂ，３ｃ，３ｄとは原水ポンプ６を備えた原水供
給管７にバルブ８，１０により切換可能に接続さ
れている。なお槽底部の原水吹出し口は一例とし
て４個の場合を図示しているが、３個以下または
５個以上としても差し支えない。 Hereinafter, the configuration of the present invention will be explained based on embodiments shown in the drawings. In FIG. 1, 1 is a tower-shaped tank, and on the side of this tank 1 there are at least one (three as an example in the drawing) raw water inlets 2a, 2b,
2c, and at least one (four in the drawing as an example) raw water inlets 3a, 3 at the bottom of the tank 1.
b, 3c, 3d to each raw water outlet 4a, 4b, 4
Install so that c and 4d are facing upward. Note that instead of providing the raw water inlet at the bottom of the tank, it may be provided at the bottom of the tank. Raw water inlet 2a, 2b, 2 on the side of the tank
Raw water outlets 5a, 5b, and 5c are provided in c, and the directions of these raw water outlets 5a, 5b, and 5c are installed at an angle of 0° to 90° with respect to the normal line of tank 1. . The drawing shows a case where the number of raw water outlets on the side of the tank is three, but it is desirable to have three or more and install them with variations in the vertical and horizontal directions of the tank. It is also desirable to install the equipment so that it has different angles to the horizontal and vertical planes. Furthermore, raw water outlets 4a, 4 provided at the bottom of the tank
Both raw water outlets are provided so that the total opening area A of the raw water outlets 5a, 4c, and 4d is larger than the total opening area B of the raw water outlets 5a, 5b, and 5c provided on the side of the tank. In addition, the raw water inlet 2a installed on the side of the tank,
2b, 2c, and raw water inlets 3a, 3 provided at the bottom of the tank.
b, 3c, and 3d are switchably connected to a raw water supply pipe 7 equipped with a raw water pump 6 by valves 8 and 10. Although four raw water outlets are shown as an example at the bottom of the tank, the number may be three or less or five or more.
上記のように、本発明の重要な要素は原水吹出
し口の数、位置、方向面積である。たとえば、槽
を沈殿槽として使用する場合は、槽底部または槽
下部に取り付けた原水吹出し口４ａ，４ｂ，４
ｃ，４ｄを用いて液上昇流れの方向にし、かつ原
水吹出し口の総面積を広くして、活性汚泥の沈殿
速度より遅い液上昇速度を取り得るようにする。
一方、完全混合状態を設定する場合は、槽側面に
取り付けた原水吹出し口５ａ，５ｂ，５ｃを使用
する。前述のように槽側面の原水吹出し口の合計
開口面積Ｂを、沈殿槽として使用する場合の原水
吹出し口の合計開口面積Ａより減少させるように
設置している。減少率は、原水吹出し口５ａ，５
ｂ，５ｃからの線速度が液撹拌に十分なようにす
る必要があるので、Ｂ／Ａの値を1/10以下にする
のが望ましい。このように槽側面の原水吹出し口
総面積を減少させることにより、原水吹出し速度
が上昇し、その結果、吹出し口５ａ，５ｂ，５ｃ
の周辺を撹拌することができる。槽側面に適当な
バラツキをもつて吹出し口を設ければ、槽内を完
全混合に近い状態にすることが可能である。さら
に槽側面に設けた原水入口２ａ，２ｂ，２ｃに接
続した原水供給管７に、空気導入管または酸素導
入管１１を、空気または酸素をバルブ１２を操作
することにより導入・遮断可能に接続している。
この空気導入管または酸素導入管１１により空気
または酸素を導入して、原水吹出し口５ａ，５
ｂ，５ｃから原水とともに槽内に吹き出し、槽内
を好気状態に保つ。原水供給管７は原水ポンプ６
を通して全ての原水吹出し口に接続され、その間
にバルブ８，１０、一例として電磁弁などを設け
ることにより、自動制御で完全混合状態、押出し
流れ状態を選定することができるように構成され
ている。空気または酸素の吹込み方法も、原水吹
出し口の吹出し速度の設定によりエジエクター方
式をとることが可能で、不十分な場合でも少圧力
のフアンを使用することにより容易に目的を達成
できる。さらに必要な場合は、槽内に散気管など
を設置しても本発明になんら障害とならない。さ
らに本発明においては、槽の形式を塔型などいか
なる形状にしてもなんら発明の効果を減少させる
ものではない。１３は槽１の上部に設けられた排
出口である。 As mentioned above, important elements of the present invention are the number, position, and directional area of the raw water outlets. For example, when using the tank as a settling tank, the raw water outlets 4a, 4b, 4 installed at the bottom of the tank or at the bottom of the tank
c and 4d are used to direct the liquid upward flow, and the total area of the raw water outlet is widened so that the liquid rise rate is slower than the sedimentation rate of activated sludge.
On the other hand, when setting a complete mixing state, the raw water outlets 5a, 5b, and 5c attached to the side of the tank are used. As mentioned above, the total opening area B of the raw water outlets on the side of the tank is set to be smaller than the total opening area A of the raw water outlets when used as a settling tank. The reduction rate is the raw water outlet 5a, 5
Since it is necessary to ensure that the linear velocity from b and 5c is sufficient for stirring the liquid, it is desirable to set the value of B/A to 1/10 or less. By reducing the total area of the raw water outlet on the side of the tank in this way, the raw water blowing speed increases, and as a result, the outlet 5a, 5b, 5c
The surrounding area can be stirred. By providing outlets with appropriate variations on the side of the tank, it is possible to bring the inside of the tank into a state close to complete mixing. Further, an air introduction pipe or an oxygen introduction pipe 11 is connected to the raw water supply pipe 7 connected to the raw water inlets 2a, 2b, and 2c provided on the side of the tank so that air or oxygen can be introduced or shut off by operating a valve 12. ing.
Air or oxygen is introduced through the air introduction pipe or oxygen introduction pipe 11, and the raw water outlet 5a, 5
It is blown into the tank along with the raw water from b and 5c to keep the tank in an aerobic state. The raw water supply pipe 7 is the raw water pump 6
It is connected to all the raw water outlets through the pump, and valves 8 and 10, such as a solenoid valve, are provided between them, so that the complete mixing state and extrusion flow state can be selected automatically. Air or oxygen can also be blown in using an ejector method by setting the blowing speed of the raw water outlet, and even if it is insufficient, the purpose can be easily achieved by using a fan with low pressure. Furthermore, if necessary, installing an aeration pipe or the like in the tank will not impede the present invention in any way. Furthermore, in the present invention, the effects of the invention are not diminished in any way even if the tank is of any shape, such as a tower type. 13 is a discharge port provided at the top of the tank 1.
上記のように構成された排水処理槽において、
好気的完全混合状態を設定する場合は、まずバル
ブ１０を閉、バルブ８を開、バルブ１２を開にし
て、原水ポンプ６を駆動させて原水を導入し槽側
面の原水吹出し口５ａ，５ｂ，５ｃから空気また
は酸素とともに槽１内に吹き込み、噴出流により
槽内を撹拌、混合した後、排出口１３から槽外に
流出させる。 In the wastewater treatment tank configured as above,
When setting an aerobic complete mixing state, first close the valve 10, open the valve 8, open the valve 12, drive the raw water pump 6 to introduce raw water, and then use the raw water outlet ports 5a and 5b on the side of the tank. , 5c into the tank 1 along with air or oxygen, and after agitating and mixing the inside of the tank by the jet flow, it flows out of the tank from the outlet 13.
また嫌気的完全混合状態を設定する場合は、バ
ルブ１０を閉、バルブ８を開、バルブ１２を閉に
して、原水ポンプ６により原水を導入し槽側面の
原水吹出し口５ａ，５ｂ，５ｃから槽１内に吹き
込み、噴出流により槽内を撹拌、混合した後、排
出口１３から槽外に流出させる。 In addition, when setting an anaerobic complete mixing state, close valve 10, open valve 8, and close valve 12, and introduce raw water with raw water pump 6 into the tank from raw water outlets 5a, 5b, and 5c on the side of the tank. After blowing into the tank 1 and agitating and mixing the inside of the tank by the jet flow, it is flowed out of the tank from the discharge port 13.
さらに押出し流れ状態、すなわち沈殿槽として
槽を設定する場合は、バルブ１０を開、バルブ８
を閉、バルブ１２を閉にして、原水ポンプ６によ
り原水を導入し槽底部の原水吹出し口４ａ，４
ｂ，４ｃ，４ｄから槽１内に吹き込み、槽内を汚
泥の沈殿速度より遅い速度で上昇させ、排出口１
３から槽外に流出させる。 Furthermore, if the tank is set up in an extrusion flow state, that is, as a settling tank, valve 10 is opened and valve 8 is opened.
Close the valve 12, and introduce raw water by the raw water pump 6 to the raw water outlet ports 4a, 4 at the bottom of the tank.
b, 4c, and 4d into the tank 1, and raise the tank at a speed slower than the sedimentation rate of the sludge.
3 to flow out of the tank.
つぎに本発明の排水処理槽の使用例を第２図に
基づいて説明する。第２図は３槽１ａ，１ｂ，１
ｃを用いて排水中のBOD成分、COD成分、窒素
成分および汚泥分離を実施する場合を示してお
り、下記の時相（以下、フエーズという）を繰り
返えし実施する。 Next, an example of use of the wastewater treatment tank of the present invention will be explained based on FIG. 2. Figure 2 shows three tanks 1a, 1b, 1
This shows a case where BOD components, COD components, nitrogen components, and sludge in wastewater are separated using c, and the following time phases (hereinafter referred to as phases) are repeatedly implemented.
フエーズ(1) 槽１ａを嫌気完全混合槽とし、槽１
ｂを好気完全混合槽とし、槽１ｃを押出し流れ
沈殿槽とし、槽１ａに原水を供給して槽１ａ、
槽１ｂ、槽１ｃの順に水を流して排出口１３ｃ
から流出させる。Phase (1) Tank 1a is an anaerobic complete mixing tank,
b is an aerobic complete mixing tank, tank 1c is an extrusion flow settling tank, raw water is supplied to tank 1a, and tank 1a,
Water flows in the order of tank 1b and tank 1c to outlet 13c.
Let it flow out.
フエーズ(2) 槽１ａを好気完全混合槽とし、槽１
ｂを好気完全混合槽とし、槽１ｃを押出し流れ
沈殿槽とし、槽１ｂに原水を供給して槽１ｂか
ら槽１ｃに水を流して排出口１３ｃから流出さ
せる。槽１ａから他の槽には水は流れない。Phase (2) Tank 1a is an aerobic complete mixing tank,
b is an aerobic complete mixing tank, tank 1c is an extrusion flow settling tank, raw water is supplied to tank 1b, water flows from tank 1b to tank 1c, and flows out from outlet 13c. Water does not flow from tank 1a to other tanks.
フエーズ(3) 槽１ａを静置槽とし、槽１ｂを好気
完全混合槽とし、槽１ｃを押出し流れ沈殿槽と
し、槽１ｂに原水を供給して槽１ｂから槽１ｃ
に水を流して排出口１３ｃから流出させる。Phase (3) Tank 1a is a static tank, tank 1b is an aerobic complete mixing tank, tank 1c is an extrusion flow sedimentation tank, raw water is supplied to tank 1b, and from tank 1b to tank 1c.
The water is allowed to flow through the drain port 13c.
フエーズ(4) 槽１ｃを嫌気完全混合槽とし、槽１
ｂを好気完全混合槽とし、槽１ａを押出し流れ
沈殿槽とし、槽１ｃに原水を供給して槽１ｃ、
槽１ｂ、槽１ａの順に水を流して排出口１３ａ
から流出させる。Phase (4) Tank 1c is an anaerobic complete mixing tank,
b is an aerobic complete mixing tank, tank 1a is an extrusion flow settling tank, raw water is supplied to tank 1c, and tank 1c,
Water flows in the order of tank 1b and tank 1a to drain port 13a.
Let it flow out.
フエーズ(5) 槽１ｃを好気完全混合槽とし、槽１
ｂを好気完全混合槽とし、槽１ａを押出し流れ
沈殿槽とし、槽１ｂに原水を供給して槽１ｂか
ら槽１ａに水を流して排出口１３ａから流出さ
せる。槽１ｃから他の槽には水は流れない。Phase (5) Tank 1c is an aerobic complete mixing tank, and tank 1
b is an aerobic complete mixing tank, tank 1a is an extrusion flow settling tank, raw water is supplied to tank 1b, water flows from tank 1b to tank 1a, and flows out from outlet 13a. Water does not flow from tank 1c to other tanks.
フエーズ(6) 槽１ｃを静置槽とし、槽１ｂを好気
完全混合槽とし、槽１ａを押出し流れ沈殿槽と
し、槽１ｂに原水を供給して槽１ｂから槽１ａ
に水を流して排出口１３ａから流出させる。Phase (6) Tank 1c is a static tank, tank 1b is an aerobic complete mixing tank, tank 1a is an extrusion flow sedimentation tank, raw water is supplied to tank 1b, and tank 1b is mixed with tank 1a.
The water is allowed to flow through the drain port 13a.
ここで静置槽とは、液の流出流入のない状態の
槽のことをいう。フエーズ(1)からフエーズ(6)に達
すると、再びフエーズ(1)に戻り、さらにこれらの
フエーズを繰り返す。 Here, the stationary tank refers to a tank in which there is no outflow or inflow of liquid. When phase (1) reaches phase (6), it returns to phase (1) again and repeats these phases.
本発明は上記のように構成されているから、１
槽にて好気槽、嫌気槽、沈殿槽の役割を果すこと
ができ、したがつて同一塔型槽を３基設置するこ
とにより、必要敷地面積を大幅に減少させること
ができ、かつ従来方式の大型の沈殿槽も必要な
く、BOD成分除去、COD成分除去、窒素除去を
可能とし、その上槽内に撹拌機を設置する必要な
いので、設備費、動力費、メンテナンス費などを
大幅に低減させることができるなどの効果を有し
ている。 Since the present invention is configured as described above, 1
A tank can play the roles of an aerobic tank, an anaerobic tank, and a sedimentation tank.Therefore, by installing three identical tower-type tanks, the required site area can be significantly reduced, and it can There is no need for a large sedimentation tank, making it possible to remove BOD components, COD components, and nitrogen. Furthermore, there is no need to install an agitator inside the tank, significantly reducing equipment costs, power costs, maintenance costs, etc. It has the effect of being able to
第１図は本発明の排水処理槽の一実施態様を示
す説明図、第２図は本発明の排水処理槽の使用状
態の一例を示すフローシートである。
１，１ａ，１ｂ，１ｃ……槽、２ａ，２ｂ，２
ｃ……原水入口、３ａ，３ｂ，３ｃ，３ｄ……原
水入口、４ａ，４ｂ，４ｃ，４ｄ……原水吹出し
口、５ａ，５ｂ，５ｃ……原水吹出し口、６……
原水ポンプ、７……原水供給管、８，１０……バ
ルブ、１１……空気導入管または酸素導入管、１
２……バルブ、１３，１３ａ，１３ｂ，１３ｃ…
…排出口。
FIG. 1 is an explanatory diagram showing one embodiment of the wastewater treatment tank of the present invention, and FIG. 2 is a flow sheet showing an example of the usage state of the wastewater treatment tank of the present invention. 1, 1a, 1b, 1c...tank, 2a, 2b, 2
c...Raw water inlet, 3a, 3b, 3c, 3d...Raw water inlet, 4a, 4b, 4c, 4d...Raw water outlet, 5a, 5b, 5c...Raw water outlet, 6...
Raw water pump, 7... Raw water supply pipe, 8, 10... Valve, 11... Air introduction pipe or oxygen introduction pipe, 1
2... Valve, 13, 13a, 13b, 13c...
…Vent.
Claims (1)
口を有する槽において、原水入口の少なくとも１
個を槽側面に設け、原水入口の少なくとも１個を
槽底部または槽下部に原水吹出し口が上向きにな
るように設け、槽側面に設けた原水入口に通じる
原水供給管に空気導入管または酸素導入管を空気
または酸素を導入・遮断可能に接続し、さらに槽
底部または槽下部に設けた原水吹出し口の合計面
積が、槽側面に設けた原水吹出し口の合計面積よ
り大きくなるように両原水吹出し口を設け、槽側
面に設けた原水入口と、槽底部または槽下部に設
けた原水入口とを原水供給管に切換可能に接続し
てなることを特徴とする排水処理槽。1 In a tank with at least two raw water inlets and a discharge port at the top, at least one of the raw water inlets
At least one raw water inlet is installed at the bottom of the tank or at the bottom of the tank so that the raw water outlet faces upward, and an air introduction pipe or oxygen is introduced into the raw water supply pipe leading to the raw water inlet located on the side of the tank. The pipes are connected so that air or oxygen can be introduced and shut off, and both raw water outlets are connected so that the total area of the raw water outlets installed at the bottom of the tank or the lower part of the tank is larger than the total area of the raw water outlets installed on the side of the tank. A wastewater treatment tank characterized in that a raw water inlet provided on the side of the tank and a raw water inlet provided at the bottom or lower part of the tank are switchably connected to a raw water supply pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9112178A JPS5518249A (en) | 1978-07-25 | 1978-07-25 | Waste water treatment tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9112178A JPS5518249A (en) | 1978-07-25 | 1978-07-25 | Waste water treatment tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5518249A JPS5518249A (en) | 1980-02-08 |
| JPS6147156B2 true JPS6147156B2 (en) | 1986-10-17 |
Family
ID=14017687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9112178A Granted JPS5518249A (en) | 1978-07-25 | 1978-07-25 | Waste water treatment tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5518249A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5784792A (en) * | 1980-11-14 | 1982-05-27 | Ebara Infilco Co Ltd | Denitrification of organic waste water |
| JPS5784793A (en) * | 1980-11-14 | 1982-05-27 | Ebara Infilco Co Ltd | Denitrification of organic waste water |
-
1978
- 1978-07-25 JP JP9112178A patent/JPS5518249A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5518249A (en) | 1980-02-08 |
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