JP4359693B2 - Wastewater treatment equipment containing persistent organic substances - Google Patents
Wastewater treatment equipment containing persistent organic substances Download PDFInfo
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- JP4359693B2 JP4359693B2 JP2004207880A JP2004207880A JP4359693B2 JP 4359693 B2 JP4359693 B2 JP 4359693B2 JP 2004207880 A JP2004207880 A JP 2004207880A JP 2004207880 A JP2004207880 A JP 2004207880A JP 4359693 B2 JP4359693 B2 JP 4359693B2
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- 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
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Description
本発明は、難分解性有機物を含む排水の処理装置に関し、特に、染色工場、染料合成工場、化成品合成工場等から排出される難分解性有機物を含む排水を、オゾン処理と生物処理を用いて浄化する排水処理装置に関するものである。 The present invention relates to a treatment apparatus for wastewater containing persistent organic substances, and in particular, wastewater containing persistent organic substances discharged from dyeing factories, dye synthesis factories, chemical synthesis factories, etc., using ozone treatment and biological treatment. The present invention relates to a wastewater treatment device for purification.
従来、染料等の難分解性有機物を含む排水を、オゾン処理とその後の生物処理とを用いて浄化処理する方法では、残留オゾンの影響を避けるため、あらかじめオゾン処理を行い、その後に別途生物処理を行う方法が採られている（例えば、特許文献１、非特許文献１参照)。ところが、オゾンは生物処理に悪影響を及ぼすものであることから、これらの方法では、生物処理する前に予め排水中のオゾンを可能な限り除去しておく必要から、オゾン処理後の排水に残留するオゾンを除去する装置を別途設ける等の手段が不可欠であるという問題があった。 Conventionally, in a method of purifying wastewater containing persistent organic substances such as dyes using ozone treatment and subsequent biological treatment, in order to avoid the effects of residual ozone, ozone treatment is performed in advance and then biological treatment is separately performed. (For example, refer to Patent Document 1 and Non-Patent Document 1). However, since ozone has an adverse effect on biological treatment, in these methods, it is necessary to remove ozone in wastewater as much as possible before biological treatment, so it remains in wastewater after ozone treatment. There has been a problem that means such as separately providing a device for removing ozone is indispensable.
本発明は、従来の技術における上記した実状に鑑みてなされたものである。すなわち、本発明の目的は、難分解性有機物含有排水を処理するに当たり、オゾン処理とその後の生物処理を連続的に行って、排水中の難分解性有機物の分解及び脱色処理を、経済的にかつ効率的に処理できる簡易な排水処理装置を提供することにある。 This invention is made | formed in view of the above-mentioned actual condition in a prior art. That is, the object of the present invention is to economically perform the decomposition and decolorization treatment of the hardly decomposable organic matter in the waste water by continuously performing the ozone treatment and the subsequent biological treatment in treating the waste water containing the hardly decomposable organic matter. Another object of the present invention is to provide a simple waste water treatment device that can be efficiently treated.
本発明は、 難分解性有機物を含有する排水を、オゾン処理工程と生物処理工程を順次通して連続的に浄化する排水処理装置において、該オゾン処理工程が、それぞれ可動壁で仕切られたオゾン接触槽、オゾン自己分解槽及び残留オゾン除去槽からなり、残留オゾンを吸着分解除去するために、前記オゾン接触槽から流出する酸素とオゾンを含むガスをオゾン分解塔に通して酸素含有ガスに変えた後、前記残留オゾン除去槽に導入することを特徴とする難分解性有機物質を含有する排水の処理装置である。その際、オゾン処理工程と生物処理工程を１個の装置内で連続的に行うことが好ましい。 The present invention relates to a wastewater treatment apparatus for continuously purifying wastewater containing a hardly decomposable organic substance through an ozone treatment step and a biological treatment step in order, and the ozone treatment step is ozone contact partitioned by a movable wall. It consists of a tank, an ozone self-decomposition tank, and a residual ozone removal tank. In order to absorb and decompose and remove residual ozone, the oxygen-containing gas flowing out of the ozone contact tank was passed through an ozone decomposition tower and changed to an oxygen-containing gas. Then, it is a wastewater treatment apparatus containing a hardly decomposable organic substance, which is introduced into the residual ozone removal tank. In that case, it is preferable to perform an ozone treatment process and a biological treatment process continuously in one apparatus.
本発明によれば、オゾン処理及び生物処理を１個の装置内で行うことができ、また、可動壁を適宜調整する操作を行うことにより、処理溶液中の残留オゾン濃度の高低に適合させることができるとともに、生物処理時間に対するオゾン処理時間を適宜調節することが可能である。
また、本発明では、送気したオゾンガス中の残留オゾンをほぼ完全に除去することにより、オゾン処理工程の廃ガスを生物処理の曝気用ガスとして再利用できる。
According to the present invention, ozone treatment and biological treatment can be performed in a single apparatus, and by adjusting the movable wall as appropriate, the residual ozone concentration in the treatment solution can be adapted to the level. It is possible to adjust the ozone treatment time with respect to the biological treatment time as appropriate.
Moreover, in this invention, the waste gas of an ozone treatment process can be reused as aeration gas of biological treatment by removing the residual ozone in the supplied ozone gas almost completely.
本発明は、染色工場や染料合成工場、農薬や医薬品等の化成品合成工場等から排出される難分解性有機物を含む排水を、オゾン処理と生物処理を組み合わせて効率的に浄化処理する排水処理装置であって、この装置では、難分解性有機物をオゾン処理した後、生物処理する際、オゾン処理を３段階で効率的に行うとともに、その後の生物処理を容易に行うことができるものである。 The present invention is a wastewater treatment that efficiently purifies wastewater containing persistent organic substances discharged from dyeing plants, dye synthesis plants, chemical synthesis plants such as agricultural chemicals and pharmaceuticals, etc. by combining ozone treatment and biological treatment. In this apparatus, when the biological treatment is performed after ozone-treating the hardly decomposable organic substance, the ozone treatment can be efficiently performed in three stages and the subsequent biological treatment can be easily performed. .
本発明におけるオゾン処理工程は、図１に見るように、難分解性有機物を含む排水（処理原水）が連続して通過するオゾン接触槽Ａとオゾン自己分解槽Ｂと残留オゾン除去槽Ｃが順に設けられており、それらの各槽間はそれぞれ可動壁により仕切られているものであり、さらに、オゾン接触槽Ａから流出するオゾンガスを吸着分解させて得られる酸素含有ガスを残留オゾン除去槽Ｃに導入するオゾン分解塔を備えたものである。 As shown in FIG. 1, the ozone treatment process in the present invention includes, in order, an ozone contact tank A, an ozone self-decomposition tank B, and a residual ozone removal tank C through which waste water (raw raw water) containing persistent organic substances passes continuously. These tanks are partitioned by movable walls, and oxygen-containing gas obtained by adsorbing and decomposing ozone gas flowing out from the ozone contact tank A is supplied to the residual ozone removal tank C. It is equipped with an ozonolysis tower to be introduced.
本発明において、オゾン接触槽では、処理原水をオゾンガスと接触させてオゾン処理を行うものであって、その原水に含まれる難分解性有機物の濃度に応じて、可動壁を移動させることにより処理量或いは処理時間を適宜調整することができる。オゾン接触槽におけるオゾンガス利用率は、通常９０〜９５％である。また、オゾン接触槽に導入されたオゾンガスのうち、使用されることなく流出するオゾンはオゾン分解塔に送られ、オゾンを分解塔内に配置した活性炭などの吸着・分解剤と接触させて分解させ、得られる酸素含有ガスを残留オゾン除去槽に送入する。オゾン分解塔における吸着・分解剤は常温で使用可能である。 In the present invention, the ozone contact tank performs ozone treatment by bringing the treated raw water into contact with ozone gas, and the amount of treatment can be obtained by moving the movable wall according to the concentration of the hardly decomposable organic matter contained in the raw water. Or processing time can be adjusted suitably. The ozone gas utilization rate in the ozone contact tank is usually 90 to 95%. Of the ozone gas introduced into the ozone contact tank, the ozone that flows out without being used is sent to the ozone decomposition tower, where it is decomposed by contacting it with an adsorption / decomposition agent such as activated carbon placed in the decomposition tower. Then, the obtained oxygen-containing gas is fed into a residual ozone removal tank. The adsorption / decomposition agent in the ozonolysis tower can be used at room temperature.
また、オゾン自己分解槽では、オゾン接触槽で処理された排水を、例えば可動壁の下部から順に受け入れ、これを一定時間保持させることにより、残留オゾンの自己分解反応を促進させる。この残留オゾンを半減させるには、通常１０〜１５分間程度の保持時間を要するものと思われる。 Further, in the ozone self-decomposition tank, the wastewater treated in the ozone contact tank is sequentially received from the lower part of the movable wall, for example, and held for a certain time, thereby promoting the self-decomposition reaction of residual ozone. In order to halve this residual ozone, it seems that a holding time of about 10 to 15 minutes is usually required.
さらに、残留オゾン除去槽では、オゾン自己分解槽で処理された後の排水を、例えば可動壁の上部から順に受け入れ、その排水中に残留する溶存オゾンをオゾン分解塔から送られる酸素含有ガスと接触させて曝気処理することにより、処理排水中の溶存オゾンはほぼ完全に除去される。この残留オゾンを除去した排水は、通常の液送ポンプ等を用いて、オゾン処理工程から生物処理工程に送り込まれる。 Furthermore, in the residual ozone removal tank, the waste water after being treated in the ozone self-decomposition tank is received in order, for example, from the upper part of the movable wall, and the dissolved ozone remaining in the waste water comes into contact with the oxygen-containing gas sent from the ozone decomposition tower. By performing the aeration treatment, the dissolved ozone in the treated waste water is almost completely removed. The waste water from which the residual ozone has been removed is sent from the ozone treatment process to the biological treatment process using a normal liquid feed pump or the like.
本発明における生物処理工程は、従来公知の如何なる方法も使用可能であって、例えば、植種源として河川表流水を用いる回分式生物処理などが用いられ、その装置としては、図１に見るように、一般的には曝気槽Ｄと沈殿槽Ｅを備えているものである。この曝気槽における生物処理の曝気用ガスとしては、オゾン処理工程の廃ガスを利用することが有利である。 As the biological treatment process in the present invention, any conventionally known method can be used. For example, batch biological treatment using river surface water as a seeding source is used, and its apparatus is shown in FIG. In general, an aeration tank D and a precipitation tank E are provided. As the aeration gas for biological treatment in this aeration tank, it is advantageous to use waste gas from the ozone treatment process.
本発明の排水処理装置は、オゾン処理工程及び生物処理工程を備えているものであれば如何なる構造でもよいが、両工程を固定壁で仕切られた１つの装置とすれば、オゾン工程で処理された後の排水を送液ポンプで生物処理に送り込むことができることから連続操作を容易に行うことができるうえに、オゾン工程の廃ガスを生物処理の曝気用ガスとして利用できることなどから有益である。 The wastewater treatment apparatus of the present invention may have any structure as long as it has an ozone treatment process and a biological treatment process. However, if both processes are made into one apparatus partitioned by a fixed wall, it is treated in the ozone process. In addition, since the waste water can be sent to the biological treatment with a liquid feed pump, continuous operation can be easily performed, and the waste gas of the ozone process can be used as an aeration gas for biological treatment.
以下、実施例により本発明を具体的に説明するが、本発明は実施例により限定されるものではない。 EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited by an Example.
図２に示すように、可動壁をオゾン接触槽Ａとオゾン自己分解槽Ｂと残留オゾン除去槽Ｃ（Ａ：Ｂ：Ｃ＝１：１：１）に設定した排水処理装置（各槽の液量 ２００ｍｌ）を用いた。
この装置に有機物（ＴＯＣ）８８．９ｍｇ／Ｌ及び色度１．８５の染色排水（原水）を導入し、これにオゾンガス（濃度３０ｍｌ／Ｌ、流量１００ｍＬ／分）を通してオゾン処理を３０分間行い、その後、Ｂ及びＣにそれぞれ３０分間滞留させた。その際の挿入オゾン及び残留オゾンの濃度変化を図３に示す。
次に、大堀川（千葉県手賀沼に流入）の表流水と栄養塩を用いた曝気槽Ｄ（液量 ２４００ｍＬ）において生物処理を１２時間行い、沈殿槽Ｅに移し処理水を得た。オゾン分解塔には、オゾン分解用の活性炭粒子を充填したカラムを用いた。
As shown in FIG. 2, the waste water treatment apparatus (liquid of each tank) which set the movable wall to the ozone contact tank A, the ozone self-decomposition tank B, and the residual ozone removal tank C (A: B: C = 1: 1: 1). Amount 200 ml) was used.
Dyeing waste water (raw water) of 88.9 mg / L organic matter (TOC) and chromaticity 1.85 was introduced into this apparatus, and ozone treatment (concentration 30 ml / L, flow rate 100 mL / min) was passed through this apparatus for 30 minutes, Thereafter, each was retained in B and C for 30 minutes. FIG. 3 shows changes in the concentrations of inserted ozone and residual ozone at that time.
Next, biological treatment was carried out for 12 hours in an aeration tank D (liquid amount: 2400 mL) using surface water and nutrient salts of the Ohori River (flowing into Teganuma, Chiba Prefecture), and transferred to a precipitation tank E to obtain treated water. For the ozonolysis tower, a column packed with activated carbon particles for ozonolysis was used.
得られた処理水中のＴＯＣ及び色度の変化を測定したところ、図４に示すように、オゾン処理後にはＴＯＣは７７．５ｍｇ／Ｌであり、色度は０．２１であった。また、生物処理後にはＴＯＣは４８．３であり、色度は０．１７であった。これらの結果から、本発明の排水処理装置を用いた染色排水から有機物及び色度を効率よく除去できるとともに、廃ガスの再利用も可能であることが分かった。 When the change of TOC and chromaticity in the obtained treated water was measured, as shown in FIG. 4, after ozone treatment, TOC was 77.5 mg / L and chromaticity was 0.21. Moreover, after biological treatment, TOC was 48.3 and chromaticity was 0.17. From these results, it was found that organic matter and chromaticity can be efficiently removed from the dyed wastewater using the wastewater treatment apparatus of the present invention, and the waste gas can be reused.
本発明は、各種工場等から排出される難分解性有機物を含む廃液の効率的な浄化に有効な排水処理装置を提供するものであり、環境汚染の削減に大きく寄与するものである。 The present invention provides a wastewater treatment apparatus effective for the efficient purification of waste liquid containing hardly decomposable organic substances discharged from various factories and the like, and greatly contributes to the reduction of environmental pollution.
Ａ・・・オゾン接触槽
Ｂ・・・オゾン自己分解槽
Ｃ・・・残留オゾン除去槽
Ｄ・・・曝気槽
Ｅ・・・沈殿槽
A ... Ozone contact tank B ... Ozone autolysis tank C ... Residual ozone removal tank D ... Aeration tank E ... Precipitation tank
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| JP2004207880A JP4359693B2 (en) | 2004-07-14 | 2004-07-14 | Wastewater treatment equipment containing persistent organic substances |
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| JP2004207880A JP4359693B2 (en) | 2004-07-14 | 2004-07-14 | Wastewater treatment equipment containing persistent organic substances |
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| JP4359693B2 true JP4359693B2 (en) | 2009-11-04 |
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