JPH0747380A - Method for treating surfactant-containing organic waste water and device therefor - Google Patents
Method for treating surfactant-containing organic waste water and device thereforInfo
- Publication number
- JPH0747380A JPH0747380A JP19494793A JP19494793A JPH0747380A JP H0747380 A JPH0747380 A JP H0747380A JP 19494793 A JP19494793 A JP 19494793A JP 19494793 A JP19494793 A JP 19494793A JP H0747380 A JPH0747380 A JP H0747380A
- Authority
- JP
- Japan
- Prior art keywords
- treatment
- biological
- surfactant
- sludge
- activated carbon
- 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.)
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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)
- Water Treatment By Sorption (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は界面活性剤を含有する有
機性排水の生物処理による処理方法および装置に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for treating organic wastewater containing a surfactant by biological treatment.
【０００２】[0002]
【従来の技術】洗剤製造排水、染色排水、半導体等の洗
浄排水などには、多量の界面活性剤および他の有機物が
含まれている。このような界面活性剤含有有機性排水の
処理方法としては、生物処理、凝集処理、活性炭処理、
あるいはこれらの組合せによる処理が行われている。こ
のうち生物処理法は活性汚泥処理のような好気性処理が
採用されるが、多量の空気を吹込む曝気が行われるた
め、発泡が起こって運転不能に陥る。2. Description of the Related Art A large amount of surfactants and other organic substances are contained in detergent manufacturing wastewater, dyeing wastewater, cleaning wastewater of semiconductors and the like. As a method for treating such surfactant-containing organic wastewater, biological treatment, coagulation treatment, activated carbon treatment,
Alternatively, processing by a combination of these is performed. Among them, the biological treatment method employs an aerobic treatment such as activated sludge treatment, but since aeration is performed by blowing a large amount of air, foaming occurs and operation becomes impossible.
【０００３】従来、このような生物処理における発泡障
害を防止するために、希釈および／または消泡剤添加が
行われている。しかし希釈を行うためには多量の希釈水
が必要になり、低濃度、低負荷運転となって効率が悪く
なるほか、濃度が変動する場合には、常に消泡できる程
度に希釈水量を制御することは困難である。また消泡剤
を添加する場合も、多量の消泡剤を必要とするほか、濃
度が変動する場合に、所定量の消泡剤を添加することは
困難であり、制御を誤ると発泡が起こるなどの問題点が
ある。Conventionally, dilution and / or addition of an antifoaming agent have been carried out in order to prevent foaming disorders in such biological treatment. However, in order to dilute, a large amount of diluting water is required, resulting in low concentration and low load operation resulting in poor efficiency. When the concentration fluctuates, the amount of diluting water is controlled so that defoaming is always possible. Is difficult. Also, when adding an antifoaming agent, a large amount of antifoaming agent is required, and it is difficult to add a predetermined amount of antifoaming agent when the concentration varies, and foaming will occur if the control is wrong. There are problems such as.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は、高濃
度に界面活性剤を含む場合でも、発泡障害を起こすこと
なく、効率よく処理を行うことが可能な界面活性剤含有
有機性排水の処理方法および装置を提供することであ
る。An object of the present invention is to provide a surfactant-containing organic waste water which can be efficiently treated without causing foaming trouble even when the surfactant is contained in a high concentration. A processing method and apparatus are provided.
【０００５】[0005]
【課題を解決するための手段】本発明は次の界面活性剤
含有有機性排水の処理方法および装置である。 （１）界面活性剤を含有する有機性排水を、硝酸または
亜硝酸イオンの存在下に、生物汚泥と接触させて生物処
理を行うことを特徴とする界面活性剤含有有機性排水の
処理方法。 （２）吸着剤に担持させた生物汚泥を用いて生物処理を
行い、その前および／または後処理として吸着剤による
処理を行うことを特徴とする上記（１）記載の方法。 （３）吸着剤に担持させた生物汚泥層を有する生物処理
帯域と、この生物処理帯域に硝酸およびまたは亜硝酸イ
オンを導入する酸素源導入手段と、前記生物処理帯域の
上流および／または下流側に配置された吸着剤処理帯域
と、を備えていることを特徴とする界面活性剤含有排水
の処理装置。The present invention is the following method and apparatus for treating organic wastewater containing a surfactant. (1) A method for treating a surfactant-containing organic wastewater, which comprises contacting an organic wastewater containing a surfactant with biological sludge in the presence of nitric acid or nitrite ion to perform biological treatment. (2) The method according to (1) above, wherein biological sludge supported on the adsorbent is used for biological treatment, and adsorbent is used as the pretreatment and / or posttreatment. (3) A biological treatment zone having a biological sludge layer supported on an adsorbent, an oxygen source introducing means for introducing nitric acid and / or nitrite ions into the biological treatment zone, and an upstream side and / or a downstream side of the biological treatment zone. And an adsorbent treatment zone disposed in the.
【０００６】本発明の処理方法は、硝酸または亜硝酸イ
オンを酸素源として生物処理を行う方法であり、これに
より希釈、消泡剤添加、曝気などを省略して、発泡を防
止する方法である。この生物処理によって、易生物分解
性の界面活性剤その他の有機物は生物分解される。難生
物分解性の界面活性剤有機物は吸着剤処理などの他の処
理を組合せることにより処理可能である。The treatment method of the present invention is a method of performing biological treatment by using nitric acid or nitrite ion as an oxygen source, whereby by omitting dilution, addition of a defoaming agent, aeration and the like, foaming is prevented. . By this biological treatment, easily biodegradable surfactants and other organic substances are biodegraded. The biodegradable surfactant organic matter can be treated by combining other treatments such as adsorbent treatment.
【０００７】本発明において処理対象とする排水は、界
面活性剤および有機物を含む排水であり、前述の洗剤製
造排水、染色排水、半導体等の洗浄排水などがあげられ
るが、これらに制限されない。このような排水には界面
活性剤のほかに、溶剤としてのアルコール、その他の有
機物が含まれている。界面活性剤および有機物としては
制限はなく、易生物分解性のものが好ましいが、難生物
分解性のものが含まれていてもよい。これらの排水はそ
のまま、または凝集沈澱処理等の前処理を行って本発明
の処理に供することができる。The wastewater to be treated in the present invention is a wastewater containing a surfactant and an organic substance, and includes, but is not limited to, the above-mentioned detergent manufacturing wastewater, dyeing wastewater, cleaning wastewater for semiconductors and the like. Such waste water contains alcohol as a solvent and other organic substances in addition to the surfactant. There is no limitation on the surfactant and the organic substance, and those which are easily biodegradable are preferable, but those which are hardly biodegradable may be included. These wastewaters can be used for the treatment of the present invention as they are, or after undergoing a pretreatment such as a coagulation sedimentation treatment.
【０００８】このような排水と接触させる生物汚泥は、
硝酸または亜硝酸イオンの存在下に有機物を分解する好
気性生物汚泥であり、活性汚泥のような一般の好気性汚
泥を被処理水と混合し、あるいは混合することなく、硝
酸または亜硝酸イオンの存在下に有機性排水を処理する
ことにより自然発生的に生成させることができる。この
ような汚泥の生物相はニトロバクタなどの脱窒細菌が優
勢となったものであり、排水の硝化脱窒処理における脱
窒汚泥をそのまま用いることもできる。The biological sludge to be brought into contact with such wastewater is
It is an aerobic biological sludge that decomposes organic matter in the presence of nitric acid or nitrite ion, and it mixes ordinary aerobic sludge such as activated sludge with treated water, or without mixing nitric acid or nitrite ion. It can be generated spontaneously by treating organic wastewater in the presence. The biota of such sludge is dominated by denitrifying bacteria such as nitrobacta, and the denitrification sludge in the nitrification and denitrification treatment of wastewater can be used as it is.
【０００９】このような生物汚泥は、フロック状の生物
汚泥をそのまま懸濁状態で用いることもできるが、粒
状、繊維状、その他の空隙率の大きい担体に担持させて
用いることもできる。担体としては生物汚泥を担持でき
るものであれば制限はないが、活性炭、アルミナゲルの
ような界面活性その他の有機物に対する吸着能を有する
吸着剤を用いると、吸着剤処理用としても用いることが
できる。担体に生物汚泥を担持させるには、担体の存在
下に馴養ないし処理を行うことにより、担持させること
ができる。As such biological sludge, floc-like biological sludge can be used as it is in a suspended state, but it can also be used by supporting it on a granular, fibrous, or other carrier having a high porosity. The carrier is not limited as long as it can support biological sludge, but if an adsorbent having an adsorption ability for surface active substances such as activated carbon and alumina gel and other organic substances is used, it can also be used for adsorbent treatment. . The biological sludge can be carried on the carrier by acclimation or treatment in the presence of the carrier.
【００１０】硝酸または亜硝酸イオンは酸素源として用
いられるものであり、硝酸塩および／または亜硝酸塩を
添加することができるが、硝酸または亜硝酸イオンを含
む排水、あるいはアンモニア含有排水の硝化液などが得
られれば、これらと混合処理することもできる。硝酸ま
たは亜硝酸イオンの添加量は被処理水中の全有機物（Ｃ
ＯＤCr）の１当量倍以上であればよいが、１．２〜２当
量倍とするのが好ましい。Nitric acid or nitrite ion is used as an oxygen source, and nitrate and / or nitrite can be added. Once obtained, they can be mixed and treated. The amount of nitric acid or nitrite ion added depends on the total organic matter (C
It may be 1 equivalent times or more of (OD Cr ), but is preferably 1.2 to 2 equivalents.
【００１１】被処理水、生物汚泥および硝酸または亜硝
酸イオンの接触方法は任意であり、フロック状の生物汚
泥を用いるときは、完全混合型、プラグフロー型などが
採用できる。担体に担持させた生物汚泥を用いるとき
は、固定床式、流動床式などが採用でき、固定床式の場
合上向流、下流など任意の方法により接触させることが
できる。The method of contacting the water to be treated, the biological sludge and the nitric acid or nitrite ion is arbitrary, and when a floc-like biological sludge is used, a complete mixing type or a plug flow type can be adopted. When the biological sludge supported on the carrier is used, a fixed bed type, a fluidized bed type or the like can be adopted, and in the case of the fixed bed type, the sludge can be brought into contact by any method such as upward flow or downstream.
【００１２】活性炭等の吸着剤を担体として用いる場合
は、その前および／または後工程に、吸着工程を行うよ
うに吸着剤を配置することができる。この場合、易生物
分解性の界面活性剤その他の有機物を含む排水の場合は
下流側のみでよいが、難生物分解性の排水の場合は上流
側にも配置するのが望ましい。この場合、吸着剤を下流
側から上流側に移動させることにより、下流側で吸着用
として使用した吸着剤を中間部で担体として利用し、上
流側でさらに吸着用として利用することができる。上流
側で吸着用として使用する場合は、その下流にあたる中
間部に硝酸または亜硝酸イオンを導入することにより、
中間部で生物処理を行うことができる。When an adsorbent such as activated carbon is used as a carrier, the adsorbent can be arranged before and / or after the adsorbent so as to perform the adsorption step. In this case, in the case of wastewater containing an easily biodegradable surfactant and other organic substances, it is sufficient to arrange it only on the downstream side, but in the case of wastewater which is hardly biodegradable, it is desirable to arrange it on the upstream side. In this case, by moving the adsorbent from the downstream side to the upstream side, the adsorbent used for adsorption on the downstream side can be used as a carrier in the intermediate portion and further used for adsorption on the upstream side. When used for adsorption on the upstream side, by introducing nitric acid or nitrite ions into the intermediate part, which is the downstream side,
Biological treatment can be performed in the middle part.
【００１３】[0013]
【作用】本発明においては、界面活性剤を含有する有機
性排水を、硝酸または亜硝酸イオンの存在下に、生物汚
泥と接触させることにより、排水中の易生物分解性の界
面活性剤その他の有機物は、生物汚泥中の硝酸または亜
硝酸イオンを酸素源として資化する生物によって分解さ
れる。このときの反応系のｐＨは８．０〜８．５が好ま
しく、処理性能が悪化すると、ｐＨは低下する。In the present invention, the organic wastewater containing a surfactant is brought into contact with biological sludge in the presence of nitric acid or nitrite ion to remove easily biodegradable surfactant and other surfactants in the wastewater. Organic matter is decomposed by organisms that assimilate nitric acid or nitrite ion in biological sludge as an oxygen source. The pH of the reaction system at this time is preferably 8.0 to 8.5, and if the treatment performance deteriorates, the pH decreases.
【００１４】上記の生物処理は生物汚泥、被処理水およ
び硝酸または亜硝酸イオンが均一に接触するように、必
要により緩やかな攪拌を行うだけでよく、活性汚泥処理
法におけるような曝気を行う必要がないため、発泡は起
こらない。上記の処理により分解されない難生物分解性
の界面活性剤その他の有機物は生物処理の前および／ま
たは後に配置される活性炭等の吸着剤により除去され
る。In the above biological treatment, gentle agitation may be carried out if necessary so that the biological sludge, the water to be treated and the nitric acid or nitrite ion are uniformly contacted, and aeration as in the activated sludge treatment method is required. No foaming occurs because there is no The biodegradable surfactant and other organic substances which are not decomposed by the above treatment are removed by an adsorbent such as activated carbon arranged before and / or after the biological treatment.
【００１５】生物処理の上流側に吸着剤処理帯域を配置
した場合は、ここで被処理水中の高濃度の界面活性剤そ
の他の有機物が吸着される。そしてその下流側に設けら
れた生物処理帯域に、硝酸または亜硝酸イオンを導入す
ることにより生物処理が行われる。また下流側に吸着剤
処理帯域を配置した場合は、生物処理によって分解され
なかった界面活性剤その他の有機物がここで吸着され
る。When the adsorbent treatment zone is arranged on the upstream side of the biological treatment, a high concentration of the surfactant and other organic substances in the water to be treated are adsorbed here. Then, biological treatment is carried out by introducing nitric acid or nitrite ion into the biological treatment zone provided on the downstream side. Further, when the adsorbent treatment zone is arranged on the downstream side, the surfactant and other organic substances which are not decomposed by the biological treatment are adsorbed here.
【００１６】吸着剤を下流側から上流側に移動させる場
合は、吸着剤は下流側で生物処理により分解できない少
量の界面活性剤その他の有機物を吸着する仕上処理用と
して利用され、中間部で生物担体として利用された後、
上流で多量の界面活性剤その他の有機物を吸着する粗取
り用として利用され、吸着剤の有効利用がはかられる。
使用後の吸着剤は再生し、再循環して使用される。When the adsorbent is moved from the downstream side to the upstream side, the adsorbent is used as a finishing treatment for adsorbing a small amount of a surfactant and other organic substances which cannot be decomposed by biological treatment on the downstream side, and the adsorbent is used in the intermediate portion. After being used as a carrier,
It is used for roughing up to adsorb a large amount of surfactants and other organic substances in the upstream, so that the adsorbent can be effectively used.
The used adsorbent is regenerated and recycled.
【００１７】[0017]
【実施例】以下、本発明の実施例について説明する。図
１（ａ）、（ｂ）はそれぞれ別の実施例の界面活性剤含
有有機性排水の処理装置を示す系統図である。図１
（ａ）は難生物分解性排水に適した処理装置であり、処
理槽１内に上から活性炭後処理層２、生物処理層３、活
性炭前処理層４が積層されている。処理槽１の下部に
は、被処理水導入路５および活性炭排出路６が連絡し、
上部には処理水排出路７、活性炭導入路８が連絡し、中
間部の生物処理層３の下部には酸素源導入路９が連絡し
ている。EXAMPLES Examples of the present invention will be described below. 1 (a) and 1 (b) are system diagrams showing a surfactant-containing organic wastewater treatment apparatus of another embodiment. Figure 1
(A) is a treatment device suitable for hardly biodegradable wastewater, and an activated carbon post-treatment layer 2, a biological treatment layer 3, and an activated carbon pre-treatment layer 4 are stacked in the treatment tank 1 from above. A treated water introduction passage 5 and an activated carbon discharge passage 6 communicate with the lower part of the treatment tank 1,
The treated water discharge passage 7 and the activated carbon introduction passage 8 are connected to the upper portion, and the oxygen source introduction passage 9 is connected to the lower portion of the biological treatment layer 3 in the middle portion.
【００１８】図１（ｂ）は易生物分解性排水に適した処
理装置であり、ここでは活性炭前処理層４が省略され、
酸素源導入路９が被処理水導入路５に連絡しているほか
は図１（ａ）とほぼ同様の構成になっている。FIG. 1 (b) shows a treatment apparatus suitable for easily biodegradable wastewater, in which the activated carbon pretreatment layer 4 is omitted.
The configuration is almost the same as that of FIG. 1A except that the oxygen source introduction passage 9 is connected to the untreated water introduction passage 5.
【００１９】上記の処理装置では、活性炭導入路８から
処理槽１の上部に活性炭を導入して順次下に移動させ、
処理槽１の下部から活性炭排出路６を通して排出する。
この状態で被処理水導入路５から被処理水を導入すると
ともに、酸素源導入路９から硝酸または亜硝酸塩を導入
して処理を行う。In the above processing apparatus, the activated carbon is introduced from the activated carbon introduction path 8 to the upper part of the treatment tank 1 and sequentially moved downward,
It discharges from the lower part of the processing tank 1 through the activated carbon discharge path 6.
In this state, the treated water is introduced from the treated water introducing passage 5 and nitric acid or nitrite is introduced from the oxygen source introducing passage 9 to perform the treatment.
【００２０】図１（ａ）では、処理槽１の下部に入った
被処理水は活性炭前処理層４で、上向流で流れて前処理
を受け、高濃度の界面活性剤その他の有機物を粗取りさ
れる。そして酸素源導入路９から導入される硝酸または
亜硝酸塩を混合した状態で生物処理層３を通過する際、
活性炭裏面に担持された生物汚泥と接触して生物処理を
受け、易生物分解性の界面活性剤その他の有機物が分解
される。その後被処理水は活性炭後処理層２に流入して
後処理を受け、残留する少量の界面活性剤その他の有機
物が吸着される。処理水は処理槽１の上部から処理水排
出路７を通して取出される。In FIG. 1 (a), the water to be treated which has entered the lower portion of the treatment tank 1 flows in an activated carbon pretreatment layer 4 in an upward flow to undergo pretreatment, and a high concentration of a surfactant and other organic substances are added. Roughly taken. When passing through the biological treatment layer 3 in a state where nitric acid or nitrite introduced from the oxygen source introduction path 9 is mixed,
The biological sludge brought into contact with the back surface of the activated carbon is subjected to biological treatment to decompose easily biodegradable surfactants and other organic substances. After that, the water to be treated flows into the activated carbon post-treatment layer 2 and undergoes post-treatment, and a small amount of residual surfactant and other organic substances are adsorbed. The treated water is taken out from the upper part of the treatment tank 1 through the treated water discharge passage 7.
【００２１】活性炭は活性炭導入路８から処理槽１の上
部に導入されて活性炭後処理層２を形成し、ここで生物
汚泥が付着しない状態で残留有機物を吸着し、活性炭後
処理を行う。その後活性炭は生物処理層３に移動し、こ
こで自然発生的に付着する生物汚泥により、硝酸または
亜硝酸塩を酸素源とする生物処理が行われる。生物汚泥
を担持した活性炭は活性炭前処理層４に移動すると、酸
素源は断たれるため生物処理は行われず、濃度の高い界
面活性剤その他の有機物を吸着し、活性炭前処理を行
う。そして処理槽１の下部に至った活性炭は活性炭排出
路６から取出され、再生して再使用される。Activated carbon is introduced from the activated carbon introducing passage 8 to the upper part of the treatment tank 1 to form the activated carbon post-treatment layer 2, where the residual organic matter is adsorbed and the activated carbon post-treatment is carried out in the state where the biological sludge does not adhere. After that, the activated carbon moves to the biological treatment layer 3, where the biological sludge that spontaneously adheres is subjected to biological treatment using nitric acid or nitrite as an oxygen source. When the activated carbon carrying the biological sludge moves to the activated carbon pretreatment layer 4, the oxygen source is cut off so that the biological treatment is not performed and the highly concentrated surfactant and other organic substances are adsorbed to perform the activated carbon pretreatment. Then, the activated carbon reaching the lower part of the treatment tank 1 is taken out from the activated carbon discharge path 6, regenerated and reused.
【００２２】図１（ｂ）では、酸素源導入路９から硝酸
または亜硝酸塩を混入した被処理水導入路５の被処理水
は、処理槽１下部の生物処理槽３に入って生物処理を受
け、活性炭後処理層２で後処理を受ける。他の操作は図
１（ａ）の場合とほぼ同様である。活性炭の供給、取出
は連続または間欠的に行うことができる。In FIG. 1 (b), the water to be treated in the water to be treated 5 into which the nitric acid or nitrite is mixed from the oxygen source introducing passage 9 enters the biological treatment tank 3 below the treatment tank 1 for biological treatment. The activated carbon post-treatment layer 2 receives the post-treatment. Other operations are almost the same as in the case of FIG. The activated carbon can be supplied and taken out continuously or intermittently.
【００２３】以上の処理は、被処理水を活性炭または生
物汚泥と接触するように流して処理を行うため、曝気は
必要でなく、発泡は起こらない。そして易生物分解性の
界面活性剤その他の有機物は生物分解により除去され、
難生物分解性の界面活性剤その他の有機物は活性炭によ
って除去されるため、難生物分解性の排水でも、希釈ま
たは消泡剤の添加なしに処理を行うことができる。そし
て活性炭を処理槽１の上部から順次下部へ移動すること
により、後処理、生物汚泥担体、前処理と有効に利用す
ることができ、効率のよい処理を行うことができる。 試験例１ 洗剤製造排水（ＣＯＤMn：１０７０ｍｇ／ｌ、ＣＯ
ＤCr：５８００ｍｇ／ｌ、ＢＯＤ：１７１０ｍｇ／ｌ）
を凝集沈澱処理して、ＣＯＤMn：３００ｍｇ／ｌ、ＣＯ
ＤCr：９８０ｍｇ／ｌ、ＢＯＤ：２００ｍｇ／ｌ、発泡
性大の被処理水を得た。この被処理水に無希釈で硝酸ナ
トリウムを５ｇ／ｌ添加して、馴養したフロック状の生
物汚泥と接触させ、ＢＯＤ負荷０．３ｋｇ／ｍ3・ｄ、
ＤＴ１６Ｈｒｓで生物処理を行った。Since the above treatment is carried out by flowing the water to be treated so as to come into contact with the activated carbon or the biological sludge, aeration is not necessary and foaming does not occur. And biodegradable surfactants and other organic substances are removed by biodegradation,
Since the biodegradable surfactant and other organic substances are removed by activated carbon, the biodegradable wastewater can be treated without dilution or addition of an antifoaming agent. Then, by moving the activated carbon sequentially from the upper part of the treatment tank 1 to the lower part, it is possible to effectively utilize the post-treatment, the biological sludge carrier, and the pre-treatment, and the efficient treatment can be performed. Test Example 1 Detergent manufacturing wastewater (COD Mn : 1070 mg / l, CO
D Cr : 5800 mg / l, BOD: 1710 mg / l)
Was coagulated and precipitated to obtain COD Mn : 300 mg / l, CO
D Cr : 980 mg / l, BOD: 200 mg / l, and water having a large foaming property was obtained. To this water to be treated, undiluted 5 g / l of sodium nitrate was added and brought into contact with the acclimated floc-like biological sludge, and the BOD load was 0.3 kg / m 3 · d,
Biological treatment was performed with DT16Hrs.
【００２４】処理中の発泡は少なく、運転は良好であっ
た。得られた処理水は無色透明で、ＣＯＤMn：８４ｍｇ
／ｌ（除去率７２％）、ＣＯＤCr：２５０ｍｇ／ｌ（除
去率７４％）、ＢＯＤ：１０ｍｇ／ｌ以下（除去率：９
５％以上）であった。この処理水をさらに活性炭処理し
たところ発泡はなく、ＣＯＤMnは１５ｍｇ／ｌとなっ
た。Foaming during processing was low and operation was good. The resulting treated water is colorless and transparent, and COD Mn : 84 mg
/ L (removal rate 72%), COD Cr : 250 mg / l (removal rate 74%), BOD: 10 mg / l or less (removal rate: 9
5% or more). When this treated water was further treated with activated carbon, there was no foaming and COD Mn was 15 mg / l.
【００２５】比較例１ 試験例１の被処理水を水道水で５倍希釈して、消泡剤を
７０ｍｇ／ｌ添加し、ＢＯＤ負荷０．０３ｋｇ−ＢＯＤ
／ｍ3・ｄ、ＤＴ３６Ｈｒｓで通常の活性汚泥処理を行
った。処理中の発泡は大であったが運転は可能であっ
た。得られた処理水は微濁しており、ＣＯＤMn：２８ｍ
ｇ／ｌ（除去率５３％）、ＣＯＤCr：９３ｍｇ／ｌ（除
去率５２％）、ＢＯＤ：１０ｍｇ／ｌ以下（除去率９５
％以上）であった。Comparative Example 1 The water to be treated in Test Example 1 was diluted 5 times with tap water, an antifoaming agent was added at 70 mg / l, and the BOD load was 0.03 kg-BOD.
/ M 3 · d, DT36Hrs was used for normal activated sludge treatment. The foaming during the treatment was large, but the operation was possible. The obtained treated water was slightly turbid and COD Mn : 28 m
g / l (removal rate 53%), COD Cr : 93 mg / l (removal rate 52%), BOD: 10 mg / l or less (removal rate 95
% Or more).
【００２６】比較例２ 試験例１の被処理水に無希釈で消泡剤１００ｍｇ／ｌを
添加し、ＢＯＤ負荷０．１３ｋｇ−ＢＯＤ／ｍ3・ｄ、
ＤＴ３６ＨｒＳで活性汚泥処理を行った。処理中の発泡
は大で汚泥を保持できず、安定運転は行えなかった。処
理水は白濁しており、ＣＯＤMn：１７７ｍｇ／ｌ（除去
率４１％）、ＣＯＤCr：４２１ｍｇ／ｌ（除去率４７
％）、ＢＯＤ：５０ｍｇ／ｌ（除去率７５％）であっ
た。Comparative Example 2 100 mg / l of an antifoaming agent was added undiluted to the water to be treated in Test Example 1, and the BOD load was 0.13 kg-BOD / m 3 · d.
Activated sludge treatment was performed with DT36HrS. During the treatment, foaming was large, sludge could not be retained, and stable operation could not be performed. The treated water was cloudy, and COD Mn : 177 mg / l (removal rate 41%), COD Cr : 421 mg / l (removal rate 47
%) And BOD: 50 mg / l (removal rate 75%).
【００２７】試験例２ カラムの下部に活性炭を２５０ｍｌ充填し、その上部に
生物汚泥を担持した活性炭５００ｍｌを充填し、槽下部
から試験例１の被処理水を上向流で通水して処理を行っ
た。生物汚泥層の下部には被処理水１literあたり２．
７ｇの亜硝酸ナトリウムを注入し、ＢＯＤ負荷０．８ｋ
ｇ／ｍ3・ｄ、ＤＴ４Ｈｒｓで生物処理を行った。Test Example 2 250 ml of activated carbon was packed in the lower part of the column, 500 ml of activated carbon carrying biological sludge was packed in the upper part of the column, and the treated water of test example 1 was passed from the bottom of the tank in an upward flow for treatment. I went. At the bottom of the biological sludge layer, there are 2.
Inject 7g sodium nitrite, BOD load 0.8k
Biological treatment was performed with g / m 3 · d and DT4Hrs.
【００２８】下部活性炭層出口水はＣＯＤMn：１６０ｍ
ｇ／ｌ、ＢＯＤ：１３０ｍｇ／ｌで、発泡はなかった。
生物処理層では発泡はなく、安定して運転を行うことが
できた。得られた処理水は無色透明であり、ＣＯＤMn：
３０ｍｇ／ｌ（除去率８１％）、ＣＯＤCr：７１ｍｇ／
ｌ（除去率７９％）、ＢＯＤ：５ｍｇ／ｌ以下（除去率
９５％以上）であった。The outlet water of the lower activated carbon layer is COD Mn : 160 m
There was no foaming at g / l and BOD: 130 mg / l.
There was no foaming in the biological treatment layer, and stable operation was possible. The resulting treated water is colorless and transparent and has COD Mn :
30 mg / l (removal rate 81%), COD Cr : 71 mg /
1 (removal rate 79%) and BOD: 5 mg / l or less (removal rate 95% or more).
【００２９】[0029]
【発明の効果】本発明の界面活性剤含有有機性排水の処
理法は、硝酸または亜硝酸イオンを酸素源として生物処
理を行うため、曝気を行う必要がなく、このため発泡障
害を防止することができ、これにより希釈および消泡剤
添加を行うことなく、効率よく界面活性剤その他の有機
物を除去することができる。The method of treating organic wastewater containing a surfactant of the present invention does not require aeration because biological treatment is carried out using nitric acid or nitrite ion as an oxygen source, thus preventing foaming trouble. As a result, the surfactant and other organic substances can be efficiently removed without performing dilution and addition of an antifoaming agent.
【００３０】生物汚泥を吸着剤に担持させ、生物処理の
前および／または後処理として吸着剤処理を行うとき
は、吸着剤を担体としても用いることができ、さらに処
理効率および処理水質を高めることができる。When the biological sludge is supported on the adsorbent and the adsorbent treatment is carried out as the pretreatment and / or posttreatment of the biological treatment, the adsorbent can be used also as a carrier to further enhance the treatment efficiency and treated water quality. You can
【図１】（ａ）、（ｂ）は別の実施例の処理装置を示す
系統図である。1A and 1B are system diagrams showing a processing apparatus of another embodiment.
１ 処理槽 ２ 活性炭後処理層 ３ 生物処理槽 ４ 活性炭前処理槽 ５ 被処理水導入路 ６ 活性炭排出路 ７ 処理水排出路 ８ 活性炭導入路 ９ 酸素源導入路 1 Treatment tank 2 Activated carbon post-treatment layer 3 Biological treatment tank 4 Activated carbon pre-treatment tank 5 Treated water introduction passage 6 Activated carbon discharge passage 7 Treated water discharge passage 8 Activated carbon introduction passage 9 Oxygen source introduction passage
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成５年１０月７日[Submission date] October 7, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００６[Correction target item name] 0006
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００６】本発明の処理方法は、硝酸または亜硝酸イ
オンを酸素源として生物処理を行う方法であり、これに
より希釈、消泡剤添加、曝気などを省略して、発泡を防
止する方法である。この生物処理によって、易生物分解
性の界面活性剤その他の有機物は生物分解される。難生
物分解性の界面活性剤その他の有機物は吸着剤処理など
の他の処理を組合せることにより処理可能である。The treatment method of the present invention is a method of performing biological treatment by using nitric acid or nitrite ion as an oxygen source, whereby by omitting dilution, addition of a defoaming agent, aeration and the like, foaming is prevented. . By this biological treatment, easily biodegradable surfactants and other organic substances are biodegraded. The biodegradable surfactant and other organic substances can be treated by combining other treatments such as adsorbent treatment.
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００８[Correction target item name] 0008
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００８】このような排水と接触させる生物汚泥は、
硝酸または亜硝酸イオンの存在下に有機物を分解する好
気性生物汚泥であり、活性汚泥のような一般の好気性汚
泥を被処理水と混合し、あるいは混合することなく、硝
酸または亜硝酸イオンの存在下に有機性排水を処理する
ことにより自然発生的に生成させることができる。この
ような汚泥の生物相はシュードモナスなどの脱窒細菌が
優勢となったものであり、排水の硝化脱窒処理における
脱窒汚泥をそのまま用いることもできる。The biological sludge to be brought into contact with such wastewater is
It is an aerobic biological sludge that decomposes organic matter in the presence of nitric acid or nitrite ion, and it mixes ordinary aerobic sludge such as activated sludge with treated water, or without mixing nitric acid or nitrite ion. It can be generated spontaneously by treating organic wastewater in the presence. The biota of such sludge is dominated by denitrifying bacteria such as Pseudomonas, and the denitrification sludge in the nitrification denitrification treatment of wastewater can be used as it is.
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００９[Correction target item name] 0009
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００９】このような生物汚泥は、フロック状の生物
汚泥をそのまま懸濁状態で用いることもできるが、粒
状、繊維状、その他の空隙率の大きい担体に担持させて
用いることもできる。担体としては生物汚泥を担持でき
るものであれば制限はないが、活性炭、アルミナゲルの
ような界面活性剤その他の有機物に対する吸着能を有す
る吸着剤を用いると、吸着剤処理用としても用いること
ができる。担体に生物汚泥を担持させるには、担体の存
在下に馴養ないし処理を行うことにより、担持させるこ
とができる。As such biological sludge, floc-like biological sludge can be used as it is in a suspended state, but it can also be used by supporting it on a granular, fibrous, or other carrier having a high porosity. Is not particularly limited as long as it can carry a biological sludge as a carrier, activated carbon, using an adsorbent having adsorption capacity for surfactants other organic materials, such as alumina gel, also be used as an adsorbent for processing it can. The biological sludge can be carried on the carrier by acclimation or treatment in the presence of the carrier.
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１１[Correction target item name] 0011
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１１】被処理水、生物汚泥および硝酸または亜硝
酸イオンの接触方法は任意であり、フロック状の生物汚
泥を用いるときは、完全混合型、プラグフロー型などが
採用できる。担体に担持させた生物汚泥を用いるとき
は、固定床式、流動床式などが採用でき、固定床式の場
合上向流、下向流など任意の方法により接触させること
ができる。The method of contacting the water to be treated, the biological sludge and the nitric acid or nitrite ion is arbitrary, and when a floc-like biological sludge is used, a complete mixing type or a plug flow type can be adopted. When using biological sludge is carried on a carrier, the fixed bed, or fluidized bed can adopt, upflow case of a fixed bed, can be contacted by any method such as lower countercurrent.
【手続補正５】[Procedure Amendment 5]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２２[Name of item to be corrected] 0022
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００２２】図１（ｂ）では、酸素源導入路９から硝酸
または亜硝酸塩を混入した被処理水導入路５の被処理水
は、処理槽１下部の生物処理層３に入って生物処理を受
け、活性炭後処理層２で後処理を受ける。他の操作は図
１（ａ）の場合とほぼ同様である。活性炭の供給、取出
は連続または間欠的に行うことができる。In FIG. 1 (b), the treated water in the treated water introducing passage 5 mixed with nitric acid or nitrite from the oxygen source introducing passage 9 enters the biological treatment layer 3 below the treatment tank 1 for biological treatment. The activated carbon post-treatment layer 2 receives the post-treatment. Other operations are almost the same as in the case of FIG. The activated carbon can be supplied and taken out continuously or intermittently.
【手続補正６】[Procedure correction 6]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２６[Correction target item name] 0026
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００２６】比較例２ 試験例１の被処理水に無希釈で消泡剤１００ｍｇ／ｌを
添加し、ＢＯＤ負荷０．１３ｋｇ−ＢＯＤ／ｍ3・ｄ、
ＤＴ３６Ｈｒｓで活性汚泥処理を行った。処理中の発泡
は大で汚泥を保持できず、安定運転は行えなかった。処
理水は白濁しており、ＣＯＤMn：１７７ｍｇ／ｌ（除去
率４１％）、ＣＯＤCr：４２１ｍｇ／ｌ（除去率４７
％）、ＢＯＤ：５０ｍｇ／ｌ（除去率７５％）であっ
た。Comparative Example 2 100 mg / l of an antifoaming agent was added undiluted to the water to be treated in Test Example 1, and the BOD load was 0.13 kg-BOD / m 3 · d.
The activated sludge treatment was carried out at DT36Hr s. During the treatment, foaming was large, sludge could not be retained, and stable operation could not be performed. The treated water was cloudy, and COD Mn : 177 mg / l (removal rate 41%), COD Cr : 421 mg / l (removal rate 47
%) And BOD: 50 mg / l (removal rate 75%).
【手続補正７】[Procedure Amendment 7]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】符号の説明[Correction target item name] Explanation of code
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【符号の説明】 １ 処理槽 ２ 活性炭後処理層 ３ 生物処理層 ４ 活性炭前処理層 ５ 被処理水導入路 ６ 活性炭排出路 ７ 処理水排出路 ８ 活性炭導入路 ９ 酸素源導入路[Explanation of symbols] 1 treatment tank 2 activated carbon post-treatment layer 3 biological treatment layer 4 activated carbon pre-treatment layer 5 treated water introduction passage 6 activated carbon discharge passage 7 treated water discharge passage 8 activated carbon introduction passage 9 oxygen source introduction passage
【手続補正８】[Procedure Amendment 8]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図１[Name of item to be corrected] Figure 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図１】 [Figure 1]
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０２Ｆ 3/34 １０１ Ａ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location C02F 3/34 101 A
Claims (3)
酸または亜硝酸イオンの存在下に、生物汚泥と接触させ
て生物処理を行うことを特徴とする界面活性剤含有有機
性排水の処理方法。1. Treatment of an organic wastewater containing a surfactant, which comprises contacting an organic wastewater containing a surfactant with biological sludge in the presence of nitric acid or nitrite ion to perform biological treatment. Method.
物処理を行い、その前および／または後処理として吸着
剤による処理を行うことを特徴とする請求項１記載の方
法。2. The method according to claim 1, wherein the biological treatment is carried out using the biological sludge supported on the adsorbent, and the treatment with the adsorbent is carried out before and / or after the biological treatment.
生物処理帯域と、 この生物処理帯域に硝酸およびまたは亜硝酸イオンを導
入する酸素源導入手段と、 前記生物処理帯域の上流および／または下流側に配置さ
れた吸着剤処理帯域と、 を備えていることを特徴とする界面活性剤含有排水の処
理装置。3. A biological treatment zone having a biological sludge layer supported on an adsorbent, oxygen source introducing means for introducing nitric acid and / or nitrite ions into the biological treatment zone, and upstream of the biological treatment zone and / or A treatment apparatus for wastewater containing a surfactant, comprising: an adsorbent treatment zone arranged on the downstream side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19494793A JP3453798B2 (en) | 1993-08-05 | 1993-08-05 | Method and apparatus for treating surfactant-containing organic wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19494793A JP3453798B2 (en) | 1993-08-05 | 1993-08-05 | Method and apparatus for treating surfactant-containing organic wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0747380A true JPH0747380A (en) | 1995-02-21 |
| JP3453798B2 JP3453798B2 (en) | 2003-10-06 |
Family
ID=16332980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19494793A Expired - Fee Related JP3453798B2 (en) | 1993-08-05 | 1993-08-05 | Method and apparatus for treating surfactant-containing organic wastewater |
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| Country | Link |
|---|---|
| JP (1) | JP3453798B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1076250A (en) * | 1996-09-06 | 1998-03-24 | Unitika Ltd | Adsorbent and water treatment method using the same |
| JP2008221215A (en) * | 2008-05-09 | 2008-09-25 | Nittetsu Kankyo Engineering Kk | Treating method of organic waste water |
-
1993
- 1993-08-05 JP JP19494793A patent/JP3453798B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1076250A (en) * | 1996-09-06 | 1998-03-24 | Unitika Ltd | Adsorbent and water treatment method using the same |
| JP2008221215A (en) * | 2008-05-09 | 2008-09-25 | Nittetsu Kankyo Engineering Kk | Treating method of organic waste water |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3453798B2 (en) | 2003-10-06 |
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