JP2952125B2 - Surfactant-containing water treatment equipment - Google Patents
Surfactant-containing water treatment equipmentInfo
- Publication number
- JP2952125B2 JP2952125B2 JP4318828A JP31882892A JP2952125B2 JP 2952125 B2 JP2952125 B2 JP 2952125B2 JP 4318828 A JP4318828 A JP 4318828A JP 31882892 A JP31882892 A JP 31882892A JP 2952125 B2 JP2952125 B2 JP 2952125B2
- Authority
- JP
- Japan
- Prior art keywords
- surfactant
- activated carbon
- reaction tank
- containing water
- water
- 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 - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Water Treatment By Sorption (AREA)
- Biological Treatment Of Waste Water (AREA)
- Activated Sludge Processes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば工場排水等の、
界面活性剤含有水の処理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to an apparatus for treating surfactant-containing water.
【０００２】[0002]
【従来の技術】従来、水に溶解した各種界面活性剤を除
去する方法としては、（１）吸着剤である活性炭に吸着
させて除去する吸着法。（２）界面活性剤含有水に空気
等を吹き込むことにより気泡を形成し、この気泡と共に
活性剤を除去する泡沫分離法。（３）界面活性剤と結合
する凝集剤を界面活性剤含有水に添加し、界面活性剤を
凝集・不溶化して除去する凝集分離法、（４）微生物を
用いて分解除去する生物処理法等がある。これらの方法
のうち、活性炭による吸着法は、界面活性剤を分解処理
することができず、吸着容量が飽和した時点で活性炭を
交換しなくてはならない問題がある。また、泡沫分離法
は、界面活性剤を分解処理できない。更に、この方法に
より生じる濃縮液の処理が問題になる。2. Description of the Related Art Conventionally, as a method for removing various surfactants dissolved in water, (1) an adsorption method in which activated carbon, which is an adsorbent, is adsorbed and removed. (2) A foam separation method in which bubbles are formed by blowing air or the like into the surfactant-containing water, and the surfactant is removed together with the bubbles. (3) a coagulant that binds to a surfactant is added to the surfactant-containing water to coagulate / insolubilize and remove the surfactant; (4) a biological treatment method that decomposes and removes using a microorganism, etc. There is. Among these methods, the adsorption method using activated carbon has a problem that the surfactant cannot be decomposed and the activated carbon must be replaced when the adsorption capacity is saturated. In addition, the foam separation method cannot decompose a surfactant. In addition, the treatment of the concentrate produced by this method is problematic.
【０００３】凝集分離法も活性剤を本質的に分解して除
去するものではなく、このため発生するスラッジが産業
廃棄物として問題になる。また、界面活性剤は微生物に
対して難分解性のものが多いため、通常の生物処理装置
では分解除去率が低く、更に生物処理は一般に好気条件
で行なうものであるが、この場合に酸素を供給する曝気
操作によって生物処理装置内が発泡し、このため運転に
支障を生じる問題がある。The coagulation separation method does not essentially decompose and remove the activator, and the sludge generated is a problem as industrial waste. In addition, since many surfactants are hardly decomposed to microorganisms, the rate of decomposition and removal is low in a normal biological treatment apparatus, and biological treatment is generally performed under aerobic conditions. There is a problem that foaming occurs in the biological treatment apparatus due to the aeration operation for supplying the water, which hinders operation.
【０００４】一方、生物活性炭処理法は好気性条件下に
おいて活性炭による吸着除去作用と、活性炭表面に付着
した微生物の酸化分解作用とが共同して作用し、活性炭
の吸着活性は微生物の酸化分解作用により再生され長期
にわたって継続すると共に、微生物に対して毒性の強い
化合物が含有されている場合でも一度活性炭に吸着され
ることから、微生物に強い影響を与えることが少ない、
という利点を有する。[0004] On the other hand, in the biological activated carbon treatment method, the adsorption and removal action of activated carbon and the oxidative decomposition of microorganisms attached to the activated carbon surface work together under aerobic conditions, and the adsorption activity of activated carbon is determined by the oxidative degradation of microorganisms. It is regenerated by and continues over a long period of time, and even if it contains a compound that is highly toxic to microorganisms, it is once adsorbed on activated carbon, so that it has little impact on microorganisms,
It has the advantage that.
【０００５】生物活性炭法を用いる排水の処理装置とし
ては、従来図５に示す構成の装置が知られている。この
装置においては、排水５２はまず曝気槽５４に送られ、
ここで空気５６を充分吹き込まれて溶存酸素濃度が高め
られる。次いで、溶存酸素濃度が高められた排水はポン
プ５８によって活性炭塔６０に送られ、ここで排水中の
有機物質は活性炭に吸着されると共に当該活性炭の表面
に付着している微生物によって生物分解されるが、この
場合、分解は好気状態で行なわれる。活性炭塔６０内で
処理された排水は処理水６２として活性炭塔６０の外部
に取り出されるが、その一部は循環ポンプ６４によって
曝気槽５４に返送され、ここで再曝気され、再度上記工
程を繰り返すものである。As an apparatus for treating wastewater using the biological activated carbon method, an apparatus having a configuration shown in FIG. 5 is conventionally known. In this device, the drainage 52 is first sent to an aeration tank 54,
Here, the air 56 is sufficiently blown to increase the dissolved oxygen concentration. Next, the wastewater with an increased dissolved oxygen concentration is sent to an activated carbon tower 60 by a pump 58, where organic substances in the wastewater are adsorbed on the activated carbon and biodegraded by microorganisms attached to the surface of the activated carbon. However, in this case, the decomposition is performed in an aerobic state. The wastewater treated in the activated carbon tower 60 is taken out of the activated carbon tower 60 as treated water 62, and a part thereof is returned to the aeration tank 54 by the circulation pump 64, where it is re-aerated, and the above steps are repeated again. Things.
【０００６】上記のように、処理水の一部を曝気槽５４
に返送して処理水中の溶存酸素濃度を高めることによっ
て、活性炭塔６０を充分好気状態に保つものである。[0006] As described above, a part of the treated water is supplied to the aeration tank 54.
The activated carbon tower 60 is kept in a sufficiently aerobic state by increasing the concentration of dissolved oxygen in the treated water.
【０００７】このような処理装置を用いて排水を処理す
るに際して、排水に界面活性剤が含まれている場合に
は、曝気槽５４内で激しく発泡が起き、排水処理をする
ことができなくなる場合がある。When treating waste water using such a treatment apparatus, if the waste water contains a surfactant, vigorous bubbling occurs in the aeration tank 54, and the waste water cannot be treated. There is.
【０００８】[0008]
【発明が解決しようとする課題】本発明は上記事情に鑑
みなされたもので、その目的とする所は、発泡等の問題
を生じることなく界面活性剤含有水中の界面活性剤を分
解、除去できる界面活性剤含有水処理装置を提供するこ
とにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to decompose and remove surfactants in surfactant-containing water without causing problems such as foaming. An object of the present invention is to provide a surfactant-containing water treatment device.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に本発明は、活性炭を充填した生物反応槽と、曝気槽
と、前記生物反応槽の流出部から流出する処理水の一部
を曝気槽を介して前記生物反応槽の流入部に返送する返
送手段とを有し、界面活性剤含有水をまず前記流入部に
流入させて反応槽内で界面活性剤の吸着及び生物分解処
理をすると共に、前記反応槽の流出部から流出する処理
水の一部ないし全部を曝気槽に送り、曝気槽で曝気して
その溶存酸素量を高めた後、少なくともその一部を流入
部へ返送するように構成するものである。According to the present invention, there is provided a biological reaction tank filled with activated carbon, an aeration tank, and a part of treated water flowing out of an outlet of the biological reaction tank. Return means for returning to the inflow section of the biological reaction tank via a tank, wherein surfactant-containing water is first flowed into the inflow section to perform surfactant adsorption and biodegradation treatment in the reaction tank. At the same time, part or all of the treated water flowing out of the outflow part of the reaction tank is sent to an aeration tank, and the amount of dissolved oxygen is increased by aeration in the aeration tank, and at least a part thereof is returned to the inflow part. It is configured.
【００１０】[0010]
【作用】図５に示した従来装置においては、排水をまず
曝気槽５４に送って曝気処理した後に活性炭塔６０に送
るようにしていたが、本発明においては、まず活性炭を
充填した生物反応槽に界面活性剤含有水を送り、活性炭
に界面活性剤を吸着させて除去して処理水を得、次いで
その処理水を曝気することにより、発泡することなく溶
存酸素濃度を高めるものである。このようにして溶存酸
素濃度を高めた後、生物反応槽に曝気した処理水の少な
くとも一部を循環することにより、生物反応槽内を充分
好気的条件に保ちながら、活性炭に付着している微生物
により、界面活性剤を発泡させることなく生物学的に分
解させるものである。In the conventional apparatus shown in FIG. 5, the wastewater is first sent to the aeration tank 54 and aerated, and then sent to the activated carbon tower 60. In the present invention, the biological reaction tank filled with activated carbon is first used. Then, water containing a surfactant is sent to the activated carbon, and the surfactant is adsorbed and removed on activated carbon to obtain treated water. Then, the treated water is aerated to increase the dissolved oxygen concentration without foaming. After increasing the dissolved oxygen concentration in this way, by circulating at least a part of the treatment water aerated in the biological reaction tank, the biological reaction tank adheres to the activated carbon while keeping the inside of the reaction tank sufficiently aerobic. Microorganisms decompose surfactants biologically without foaming them.
【００１１】以下、図面を参照して本発明を詳細に説明
する。Hereinafter, the present invention will be described in detail with reference to the drawings.
【００１２】図１は本発明の界面活性剤含有水処理装置
の構成例を示すものである。FIG. 1 shows an example of the configuration of a surfactant-containing water treatment apparatus according to the present invention.
【００１３】同図中、１２は界面活性剤含有水供給管
で、その一端は生物反応槽１４の上部に設けられた流入
部１６に連結されていると共に、他端は界面活性剤含有
水の供給部（不図示）に連結されている。なお、１８は
前記供給管１２に介装された供給ポンプである。In FIG. 1, reference numeral 12 denotes a surfactant-containing water supply pipe, one end of which is connected to an inflow section 16 provided at the upper part of the biological reaction tank 14, and the other end of which has a surfactant-containing water. It is connected to a supply unit (not shown). Reference numeral 18 denotes a supply pump interposed in the supply pipe 12.
【００１４】前記生物反応槽１４は、その内部に活性炭
を充填した活性炭塔で構成されており、好気性状態で塔
内に界面活性剤含有水を通過させる運転下において、前
記活性炭表面に好気性微生物が繁殖付着し、活性炭の吸
着能と、微生物による生物分解能とが共に、発揮され、
水中の有機物が除去されるものである。The bioreactor 14 is constituted by an activated carbon tower filled with activated carbon therein, and the surface of the activated carbon is aerobic when the surfactant-containing water is passed through the tower in an aerobic state. Microorganisms propagate and adhere, and both the ability to adsorb activated carbon and the biodegradability of microorganisms are exhibited,
The organic matter in the water is removed.
【００１５】前記生物反応槽１４の下部に設けられた流
出部２０には、処理水の取出管２４の一端が連結されて
いる。An outlet 20 provided at a lower portion of the biological reaction tank 14 is connected to one end of a pipe 24 for taking out treated water.
【００１６】前記取出管２４の他端は曝気槽２８内の上
部に配置されている。The other end of the take-out tube 24 is arranged at the upper part in the aeration tank 28.
【００１７】前記曝気槽２８はその内部に処理水３０が
満たされており、その下端側に設けられた空気導入装置
３２によって空気が処理水３０に吹き込まれ、これによ
り処理水３０の溶存酸素濃度が高められる。The aeration tank 28 is filled with treated water 30, and air is blown into the treated water 30 by an air introducing device 32 provided at the lower end of the aerated tank 28, whereby the dissolved oxygen concentration of the treated water 30 is increased. Is enhanced.
【００１８】前記曝気槽２８の下部には途中に循環ポン
プ３４を介装した循環パイプ３６の一端が連結されてい
ると共に、他端は前記生物反応槽１４の流入部１６と連
結され、このパイプ３６を通って曝気槽２８内で溶存酸
素濃度を高められた処理水３０の一部は、生物反応槽１
４に返送される。なお、３８は前記ポンプ３４と曝気槽
２８との間で循環パイプ３６に連結された処理水排出管
３８で、同排出管３８にはバルブ４０が介装されてい
る。A lower end of the aeration tank 28 is connected to one end of a circulation pipe 36 provided with a circulation pump 34 on the way, and the other end is connected to the inlet 16 of the biological reaction tank 14. Part of the treated water 30 whose dissolved oxygen concentration has been increased in the aeration tank 28 through the
Returned to 4. Reference numeral 38 denotes a treated water discharge pipe 38 connected to a circulation pipe 36 between the pump 34 and the aeration tank 28, and a valve 40 is interposed in the treated water discharge pipe 38.
【００１９】次に、上記構成の処理装置を用いて界面活
性剤含有水を処理する場合につき説明すると、まずポン
プ１８によって供給管１２を通って生物反応槽１４の流
入部１６に送られた界面活性剤含有水は、反応槽１４内
を重力の作用で内部に充填した活性炭と接触しながら流
下するが、この際に界面活性剤は活性炭に吸着されると
共に、活性炭表面に付着した微生物によって生物分解が
行なわれ、界面活性剤濃度が低下した処理水が反応槽１
４の下部に連結した取出管２４から取り出されて曝気槽
２８に送られ、ここで空気を吹込まれて溶存酸素濃度を
高められた後、その一部は循環ポンプ３４の作動によ
り、循環パイプ３６を通って、生物反応槽１４の流入部
１６に返送される。Next, the case of treating the surfactant-containing water by using the treatment apparatus having the above-described structure will be described. First, the surface of the interface water sent to the inflow section 16 of the biological reaction tank 14 through the supply pipe 12 by the pump 18 will be described. The activator-containing water flows down in the reaction tank 14 while contacting the activated carbon filled therein by the action of gravity. At this time, the surfactant is adsorbed by the activated carbon and the microorganisms attached to the activated carbon surface cause the biological activity. Decomposition is performed, and the treated water having a reduced surfactant concentration is supplied to the reaction tank 1.
After being taken out of the take-out pipe 24 connected to the lower part of the pipe 4 and sent to the aeration tank 28 where air is blown to increase the concentration of dissolved oxygen, a part of it is And is returned to the inflow section 16 of the biological reaction tank 14.
【００２０】また、溶存酸素濃度を高められた処理水３
０の残部は排出管３８から系外に取り出される。Further, the treated water 3 in which the dissolved oxygen concentration is increased
The remainder of 0 is taken out of the system from the discharge pipe 38.
【００２１】上記のようにして生物反応槽１４の流入部
１６に返送された処理水は、供給管１２から流入する界
面活性剤含有水と合流して、前記生物反応槽１４を流下
しながら、前述のように活性炭、及び微生物による処理
が繰返されるが、この生物反応槽に循環される処理水中
の界面活性剤（及びその他の共存有機物）濃度は処理前
と比較して大きく減少していること、及び曝気槽２８で
充分溶存酸素濃度を高められていることから、合流した
界面活性剤含有水中の界面活性剤（及びその他の有機
物）の好気性分解をするに必要な酸素を充分に補給で
き、このため生物分解を充分に行なうことができるもの
である。The treated water returned to the inflow section 16 of the biological reaction tank 14 as described above merges with the surfactant-containing water flowing from the supply pipe 12 and flows down the biological reaction tank 14 while flowing down. As mentioned above, the treatment with activated carbon and microorganisms is repeated, but the concentration of surfactant (and other coexisting organic substances) in the treated water circulated through this biological reaction tank is greatly reduced as compared to before the treatment. Since the dissolved oxygen concentration is sufficiently increased in the aeration tank 28, the oxygen necessary for aerobic decomposition of the surfactant (and other organic substances) in the combined surfactant-containing water can be sufficiently supplied. Therefore, biodegradation can be sufficiently performed.
【００２２】また、前記曝気槽２８における曝気操作に
おいても、処理水３０は、予め生物反応槽１４内の活性
炭、及び微生物の作用によって界面活性剤濃度が充分低
減されていることから、曝気による発泡を生じない。Also, in the aeration operation in the aeration tank 28, since the concentration of the surfactant in the treated water 30 is sufficiently reduced in advance by the action of activated carbon and microorganisms in the biological reaction tank 14, foaming by aeration is performed. Does not occur.
【００２３】図２は本発明の界面活性剤含有水処理装置
の他の構成例を示すものである。FIG. 2 shows another configuration example of the surfactant-containing water treatment apparatus of the present invention.
【００２４】この構成例の装置の場合、供給管１２を通
って生物反応槽１４の下部に送られた界面活性剤含有水
は、反応槽１４内を上向流として移動する。界面活性剤
を除去された処理水は取出管２４から一部が系外に排出
されると共に、残部は循環用の処理水３０として曝気槽
２８に送られ、ここで曝気されて溶存酸素濃度を高めら
れた後、流入部１６へ返送される。In the case of the apparatus of this configuration example, the surfactant-containing water sent to the lower part of the biological reaction tank 14 through the supply pipe 12 moves in the reaction tank 14 as an upward flow. A part of the treated water from which the surfactant has been removed is discharged from the extraction pipe 24 to the outside of the system, and the remaining part is sent to the aeration tank 28 as treated water 30 for circulation, where it is aerated to reduce the dissolved oxygen concentration. After being raised, it is returned to the inflow section 16.
【００２５】なお、生物反応槽内の界面活性剤含有水の
流れを上向流とする場合には、固定床、流動床のいずれ
も採用できる。When the flow of the surfactant-containing water in the biological reaction tank is made to flow upward, either a fixed bed or a fluidized bed can be adopted.
【００２６】生物反応槽に循環する処理水の返送量は上
記含有水中の界面活性剤濃度、共存有機物濃度、及び処
理水中の上記各成分の除去目標等を考慮して決定すべき
ものであるが、一般的には界面活性剤含有水（原水）の
流入量に対して、２〜２０倍、より好ましくは５〜１０
倍とする。The return amount of the treated water circulating in the biological reaction tank should be determined in consideration of the concentration of the surfactant in the contained water, the concentration of the coexisting organic matter, the target for removing the above components in the treated water, and the like. Generally, 2 to 20 times, more preferably 5 to 10 times, the inflow amount of surfactant-containing water (raw water).
Double it.
【００２７】また、界面活性剤が微生物に対して毒性を
有する場合、または、非常に難分解性物質の場合には、
前処理として０3 処理を行うと良好に処理をする事がで
きる。When the surfactant is toxic to microorganisms or is a very hardly decomposable substance,
It can be satisfactorily processed Doing 0 3 processing as a preprocessing.
【００２８】[0028]
【実施例】図２に示す構成の装置を用いて界面活性剤含
有水中の界面活性剤の除去を行なった。 （実施条件） 界面活性剤含有水：ポリオキシエチレンノニルフェニル エーテルを２００ｍｇ／ｌ（ＴＯＣ（全有機体炭素）濃
度として３２ｍｇ−ｃ／ｌ）となるように水に溶解し
た。なお、微生物の栄養源であるＮ，Ｐは充分量添加し
た。EXAMPLE The surfactant in the surfactant-containing water was removed using the apparatus shown in FIG. (Implementation conditions) Surfactant-containing water: Polyoxyethylene nonylphenyl ether was dissolved in water so as to have a concentration of 200 mg / l (TOC (total organic carbon) concentration: 32 mg-c / l). In addition, N and P which are nutrient sources of microorganisms were added in a sufficient amount.
【００２９】界面活性剤含有水供給量：９ｌ／ｈｒ 生物反応槽：カラム φ７０ｍｍ×４３０ｍｍ（Ｈ）
（内容積 １．５ｌ） 活性炭充填量 ７００ｍｌ 呉羽化学工業（株）製 球状活性炭 ＢＡＣ（Ｇタイ
プ） 処理水循環流量 ９０ｌ／ｈｒ 分析方法：ＴＯＣはＴＯＣ５０００（島津製作所（株）
製）を用いて測定した。Surfactant-containing water supply: 9 l / hr Biological reaction tank: column φ70 mm × 430 mm (H)
(Internal volume 1.5l) Activated carbon filling amount 700ml Spherical activated carbon BAC (G type) manufactured by Kureha Chemical Industry Co., Ltd. Treated water circulation flow rate 90l / hr Analysis method: TOC is TOC5000 (Shimadzu Corporation)
Was used for the measurement.
【００３０】また、吸着等温式（Ｆｒｅｕｎｄｌｉｃｈ
式）のパラメーター（Ｋ）は常法によって求めた。The adsorption isotherm (Freundlich)
The parameter (K) in the formula) was determined by a conventional method.
【００３１】なお、比較例として、上記生物反応槽と同
じ仕様の活性炭塔を用いて界面活性剤含有水（但し、微
生物の栄養源であるＮとＰは添加していない）を反応槽
に通水（但し、処理水の循環手段や曝気槽等を有しな
い）した（比較例１）。更に、実施例と同じ仕様の活性
炭塔を備えた図５に示したようなフローの従来装置を用
いて、実施例と同じ処理条件で界面活性剤含有水の処理
を行った。（比較例２）。As a comparative example, surfactant-containing water (however, N and P, which are nutrients of microorganisms, were not added) was passed through the reaction tank using an activated carbon tower having the same specifications as the biological reaction tank. Water (however, it did not have a means for circulating treated water or an aeration tank) (Comparative Example 1). Further, using a conventional apparatus having an activated carbon tower having the same specifications as in the example and having a flow as shown in FIG. 5, the treatment with the surfactant-containing water was performed under the same treatment conditions as in the example. (Comparative Example 2).
【００３２】結果を図３に示した。図３から明らかなよ
うに、活性炭による吸着法（比較例１）では通水後、８
０時間程度で活性炭の吸着量が飽和して処理水質が悪化
した。また従来装置（比較例２）では、曝気に伴い曝気
槽内が著しく発泡したために、処理不能であった。FIG. 3 shows the results. As is clear from FIG. 3, in the adsorption method using activated carbon (Comparative Example 1), after passing water, 8
At about 0 hours, the amount of activated carbon adsorbed was saturated and the quality of treated water deteriorated. Further, in the conventional apparatus (Comparative Example 2), the inside of the aeration tank was remarkably foamed with the aeration, and thus could not be processed.
【００３３】これに対して、実施例では長時間にわたり
除去率が９０％以上という良好な処理水質を得ることが
できた。この時、装置内で発泡は生じなかった。On the other hand, in the example, good treated water quality with a removal rate of 90% or more was obtained over a long period of time. At this time, no foaming occurred in the apparatus.
【００３４】また、活性炭の経日的な吸着容量の変動
を、吸着等温式（Ｆｒｅｕｎｄｌｉｃｈ式）のパラメー
ター（Ｋ）で図４に表わした。FIG. 4 shows the variation of the adsorption capacity of activated carbon over time with the parameter (K) of the adsorption isotherm (Freundrich equation).
【００３５】 Ｆｒｅｕｎｄｌｉｃｈ式 ｘ／ｍ＝ＫＣ1/n 但 ｘ／ｍ：活性炭単位質量当りに吸着された被吸
着物質量 Ｃ ：平衡濃度 Ｋ ：パラメーター パラメーターＫは吸着容量の大きさを示すが、図４に示
すように、活性炭による吸着法（比較例１）ではＫが低
下し続けるのに対し、実施例１の場合には、通水後１０
０時間で一定の値になった。これは、この時点で活性炭
の吸着量と微生物による分解量が平衡に達していること
を示している。この結果から、本発明装置により活性炭
の寿命が著しく延びる事が明白である。Freundlicch equation x / m = KC 1 / n where x / m: amount of substance adsorbed per unit mass of activated carbon C: equilibrium concentration K: parameter Parameter K indicates the magnitude of the adsorption capacity. As shown in FIG. 4, in the adsorption method using activated carbon (Comparative Example 1), K continued to decrease.
The value became constant at 0 hours. This indicates that the amount of activated carbon adsorbed and the amount of decomposition by microorganisms have reached equilibrium at this point. From this result, it is clear that the life of activated carbon is significantly extended by the device of the present invention.
【００３６】以上の事から、従来の方法では分解処理す
ることのできなかった界面活性剤を、本発明装置により
発泡を生じることなく、生物分解処理できる事が明らか
となった。From the above, it has been clarified that a surfactant which could not be decomposed by the conventional method can be biodegraded by the apparatus of the present invention without foaming.
【００３７】[0037]
【発明の効果】本発明装置は上記のように構成すること
により、以下の効果を奏する。The device according to the present invention has the following effects by being configured as described above.
【００３８】排水中の界面活性剤をまず活性炭に吸着
させて除去し、その処理水を曝気して生物反応槽に循環
するので、曝気槽内での発泡を防止しつつ良好な生物処
理を行なうことができる。The surfactant in the wastewater is first adsorbed and removed by activated carbon, and the treated water is aerated and circulated to the biological reaction tank, so that good biological treatment is performed while preventing foaming in the aeration tank. be able to.
【００３９】活性炭に吸着された界面活性剤は、次い
で微生物による生物分解を受けるので、界面活性剤と微
生物との接触時間を長くとることができ、したがって難
分解性の界面活性剤を効果的に分解・除去できる。The surfactant adsorbed on the activated carbon is then subjected to biodegradation by microorganisms, so that the contact time between the surfactant and the microorganisms can be extended, and therefore, the surfactant that is hardly decomposable can be effectively removed. Can be disassembled and removed.
【００４０】活性炭に一旦吸着された界面活性剤がそ
の後、微生物の分解作用により徐々に分解されることに
よって活性炭の吸着能力が回復し、そのため活性炭の寿
命を大幅に伸ばすことが可能である。The surfactant once adsorbed on the activated carbon is then gradually decomposed by the decomposing action of microorganisms, thereby restoring the adsorbing ability of the activated carbon, so that the life of the activated carbon can be greatly extended.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の構成の一例を示すブロック図である。FIG. 1 is a block diagram showing an example of the configuration of the present invention.
【図２】本発明の構成の他の例を示すブロック図であ
る。FIG. 2 is a block diagram showing another example of the configuration of the present invention.
【図３】界面活性剤含有水中の界面活性剤の処理状態を
示すグラフである。FIG. 3 is a graph showing a treatment state of a surfactant in surfactant-containing water.
【図４】吸着等温式のパラメーターＫと時間の関係を示
すグラフである。FIG. 4 is a graph showing a relationship between a parameter K of an adsorption isotherm and time.
【図５】従来の生物活性炭法を利用した排水処理装置の
一例を示すブロック図である。FIG. 5 is a block diagram showing an example of a conventional wastewater treatment apparatus using a biological activated carbon method.
１２ 供給管 １４ 生物反応槽 １６ 流入部 １８ 供給ポンプ ２０ 流出部 ２４ 取出管 ２８ 曝気槽 ３０ 処理水 ３２ 空気導入装置 ３４ 循環ポンプ ３６ 循環パイプ ３８ 処理水排出管 ４０ バルブ REFERENCE SIGNS LIST 12 supply pipe 14 biological reaction tank 16 inflow section 18 supply pump 20 outflow section 24 extraction pipe 28 aeration tank 30 treated water 32 air introduction device 34 circulation pump 36 circulation pipe 38 treated water discharge pipe 40 valve
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) C02F 3/06 C02F 1/28 C02F 3/12 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) C02F 3/06 C02F 1/28 C02F 3/12
Claims (1)
と、前記生物反応槽の流出部から流出する処理水の一部
を曝気槽を介して前記生物反応槽の流入部に返送する返
送手段とを有し、界面活性剤含有水をまず前記流入部に
流入させて反応槽内で界面活性剤の吸着及び生物分解処
理をすると共に、前記反応槽の流出部から流出する処理
水の一部ないし全部を曝気槽に送り、曝気槽で曝気して
その溶存酸素量を高めた後、少なくともその一部を流入
部へ返送するように構成した界面活性剤含有水処理装
置。1. A biological reaction tank filled with activated carbon, an aeration tank, and a return for returning a part of treated water flowing out of an outlet of the biological reaction tank to an inflow section of the biological reaction tank via the aeration tank. Means for causing surfactant-containing water to flow first into the inflow section to perform adsorption and biodegradation treatment of the surfactant in the reaction tank, and one of the treated water flowing out from the outflow section of the reaction tank. A surfactant-containing water treatment apparatus configured to send part or all of the water to an aeration tank, aerate the aeration tank to increase the amount of dissolved oxygen, and then return at least part of the dissolved oxygen to an inflow part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4318828A JP2952125B2 (en) | 1992-11-27 | 1992-11-27 | Surfactant-containing water treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4318828A JP2952125B2 (en) | 1992-11-27 | 1992-11-27 | Surfactant-containing water treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06154780A JPH06154780A (en) | 1994-06-03 |
| JP2952125B2 true JP2952125B2 (en) | 1999-09-20 |
Family
ID=18103412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4318828A Expired - Fee Related JP2952125B2 (en) | 1992-11-27 | 1992-11-27 | Surfactant-containing water treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2952125B2 (en) |
-
1992
- 1992-11-27 JP JP4318828A patent/JP2952125B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06154780A (en) | 1994-06-03 |
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