JPH11300376A - Water treatment and device therefor - Google Patents
Water treatment and device thereforInfo
- Publication number
- JPH11300376A JPH11300376A JP13145098A JP13145098A JPH11300376A JP H11300376 A JPH11300376 A JP H11300376A JP 13145098 A JP13145098 A JP 13145098A JP 13145098 A JP13145098 A JP 13145098A JP H11300376 A JPH11300376 A JP H11300376A
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- Japan
- Prior art keywords
- water
- treated
- ozone
- ejector
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- Physical Water Treatments (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、下水２次処理水や
工場排水等の有機物質（ＴＯＣ、ＣＯＤ）を含む汚水の
浄化処理に用いられる水処理方法及び装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment method and apparatus used for purifying sewage containing organic substances (TOC, COD) such as secondary sewage water and industrial wastewater.
【０００２】[0002]
【従来の技術】下水２次処理水や工場排水等の浄化処理
に有効な方法として、オゾンによる酸化分解処理がある
ことは良く知られている。しかし難分解性有機物質であ
るトリハロメタン、ダイオキシン等の有機ハロゲン化合
物による汚染が深刻化し、オゾンによる酸化分解処理能
力の限界も一方では明らかになってきた。このような事
情から最近注目されているのが、ＯＨラジカル（ヒドロ
キシルラジカル）による酸化分解処理である。2. Description of the Related Art It is well known that oxidative decomposition treatment with ozone is an effective method for purifying secondary sewage water and industrial wastewater. However, pollution by organic halogen compounds such as trihalomethane and dioxin, which are hardly decomposable organic substances, has become more serious, and the limit of the oxidative decomposition treatment capacity by ozone has also become apparent. Under these circumstances, oxidative decomposition treatment using OH radicals (hydroxyl radicals) has recently attracted attention.
【０００３】ＯＨラジカルは約２．８５Ｖの酸化還元電
位をもち、オゾンの約１．４倍の酸化力を示す。ＯＨラ
ジカルを生成する方法は幾つかあるが、オゾンから生成
する方法が比較的有効とされている。そして、オゾンか
らＯＨラジカルを生成する方法には、オゾンと紫外線を
組み合わせるものや、オゾンと過酸化水素を組み合わせ
るもの、オゾンと触媒を組み合わせものなどがあり、オ
ゾンと紫外線を組み合わせる方法が有効と考えられてい
る。[0003] OH radicals have an oxidation-reduction potential of about 2.85 V and exhibit oxidizing power about 1.4 times that of ozone. Although there are several methods for generating OH radicals, a method for generating OH radicals is relatively effective. Methods for generating OH radicals from ozone include a method combining ozone and ultraviolet light, a method combining ozone and hydrogen peroxide, a method combining ozone and a catalyst, and a method combining ozone and ultraviolet light is considered to be effective. Have been.
【０００４】オゾンと紫外線を組み合わせてＯＨラジカ
ルを生成する場合、通常は特開平７−１０８２８５号公
報に記載されているように、被処理水に紫外線を照射す
るＵＶ処理塔に、散気方式によってオゾンガスが注入さ
れる。In the case of generating OH radicals by combining ozone and ultraviolet light, as described in JP-A-7-108285, a UV treatment tower for irradiating ultraviolet rays to water to be treated is usually diffused by an aeration method. Ozone gas is injected.
【０００５】また、ＵＶ処理前にエジェクタを用いてオ
ゾンガスを注入することは特公平７−２２７５３号公報
に記載されているが、ここではオゾンガスが注入された
被処理水をＵＶ処理塔へ送る前に被処理水中の気泡を除
去することが行われている。ＵＶ処理前に気泡を除去す
るのは、気泡によるに紫外線の散乱を防止して、処理効
率を上げるためと説明されている。[0005] Injecting ozone gas using an ejector before UV treatment is described in Japanese Patent Publication No. Hei 7-22753, but here, the water to be treated into which ozone gas has been injected is sent to a UV treatment tower. The removal of air bubbles in the water to be treated is performed. It is described that the bubbles are removed before the UV treatment in order to prevent scattering of the ultraviolet rays due to the bubbles and increase the treatment efficiency.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、これら
の方法では、オゾンと紫外線が組み合わされ、ＯＨラジ
カルが生成しているにもかかわらず、被処理水中の有機
物質（ＴＯＣ、ＣＯＤ）が十分に酸化分解されないこと
が、本発明者らによる調査から判明した。However, in these methods, organic substances (TOC, COD) in the water to be treated are sufficiently oxidized despite the combination of ozone and ultraviolet rays to generate OH radicals. It was found from the investigation by the present inventors that it was not decomposed.
【０００７】本発明の目的は、オゾンと紫外線の組み合
わせて汚水を酸化分解処理する場合の処理効率を効果的
に高めることができる水処理方法及び装置を提供するこ
とにある。An object of the present invention is to provide a water treatment method and apparatus capable of effectively increasing the treatment efficiency when oxidizing and decomposing wastewater by a combination of ozone and ultraviolet light.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本発明者らはオゾンと紫外線の組み合わでＯＨラジ
カルを効率よく生成する方法について実験検討を繰り返
した。その結果、以下のような事実が判明した。Means for Solving the Problems In order to achieve the above object, the present inventors have repeated experimental studies on a method for efficiently generating OH radicals by a combination of ozone and ultraviolet light. As a result, the following facts became clear.
【０００９】ＯＨラジカルの生成量を増加させるために
は、被処理水中へのオゾン溶解量を多くし、その状態で
紫外線を照射する必要がある。被処理水にオゾンガスを
注入する方法として、特開平７−１０８２８５号公報に
記載されているような散気方式を採用する場合は、被処
理水中にオゾンが十分に溶解しない。被処理水中にオゾ
ンを十分に溶解させるためには、特公平７−２２７５３
号公報に記載されているようなエジェクタを使用するこ
とが不可欠である。In order to increase the amount of OH radicals generated, it is necessary to increase the amount of ozone dissolved in the water to be treated and to irradiate ultraviolet rays in that state. When a method of injecting ozone gas into the water to be treated employs an air diffusion method as described in JP-A-7-108285, ozone is not sufficiently dissolved in the water to be treated. In order to sufficiently dissolve ozone in the water to be treated, Japanese Patent Publication No. 7-22753
It is essential to use an ejector as described in the publication.
【００１０】エジェクタを使用してオゾンガスを注入す
ると、ガス中のオゾンが被処理水に溶解すると共に、そ
の被処理水が多数の気泡を同伴してＵＶ処理塔へ流入す
る。ＵＶ処理塔に進入した気泡は、特開平７−１０８２
８５号公報に記載されているように、紫外線を散乱さ
せ、その照射効率を低下させる原因になるのは事実であ
るが、その一方で、この気泡はオゾンを含み、ＵＶ処理
塔でのオゾン供給源となることから、ＯＨラジカルの生
成を持続させ、その生成効率を高める因子にもなる。When an ozone gas is injected using an ejector, the ozone in the gas is dissolved in the water to be treated, and the water to be treated flows into the UV treatment tower together with a large number of bubbles. Bubbles that have entered the UV processing tower are described in JP-A-7-1082.
As described in Japanese Patent No. 85, it is a fact that ultraviolet rays are scattered and cause the irradiation efficiency to decrease, but on the other hand, these bubbles contain ozone, and ozone supply in a UV treatment tower is performed. Since it is a source, it also serves as a factor for maintaining the generation of OH radicals and increasing the generation efficiency.
【００１１】本発明者らはこの同伴気泡の長所・短所を
踏まえ、被処理水中の有機物質（ＴＯＣ、ＣＯＤ）の低
減に及ぼす総合的な影響を調査した結果、エジェクタに
よるオゾンガスの注入後、気泡を取り除かずに被処理水
をＵＶ処理塔に直接投入する方が有機物質（ＴＯＣ、Ｃ
ＯＤ）の低減効果が大きくなることを知見した。Based on the advantages and disadvantages of the entrained air bubbles, the present inventors investigated the overall effect on the reduction of organic substances (TOC, COD) in the water to be treated. It is better to directly charge the water to be treated into the UV treatment tower without removing the organic substances (TOC, C
OD) was found to be more effective.
【００１２】また、エジェクタ入側の水圧やＵＶ処理塔
内の水圧を高めたり、被処理水のｐＨ値を低下させるの
も、有機物質（ＴＯＣ、ＣＯＤ）の低減効果を高めるの
に有効であり、ｐＨ値の低下は特に、被処理水がＯＨラ
ジカルを分解する炭酸イオン、重炭酸イオン等のＯＨス
カベンジャを含む場合の有機物質（ＴＯＣ、ＣＯＤ）の
低減効果向上に有効なことを合わせて知見した。It is also effective to increase the water pressure at the inlet side of the ejector, the water pressure in the UV treatment tower, or the pH value of the water to be treated, in order to enhance the effect of reducing organic substances (TOC, COD). In addition, it was found that the decrease in pH value is particularly effective in improving the effect of reducing organic substances (TOC, COD) when the water to be treated contains OH scavengers such as carbonate ions and bicarbonate ions that decompose OH radicals. did.
【００１３】本発明は上記知見に基づいて完成されたも
のであり、その水処理方法は、有機物質を含む被処理水
にエジェクタによりオゾンガスを注入する工程と、エジ
ェクタによるオゾンガス注入でオゾンが溶解した気泡混
合状態の被処理水に紫外線を照射する工程とを包含して
いる。The present invention has been completed on the basis of the above findings. In the water treatment method, ozone gas is injected into water to be treated containing an organic substance by an ejector, and ozone is dissolved by the injection of ozone gas by the ejector. Irradiating the water to be treated in a bubble-mixed state with ultraviolet rays.
【００１４】エジェクタ入側の水圧は有機物質（ＴＯ
Ｃ、ＣＯＤ）を効果的に低減させるために１ｋｇ／ｃｍ
2 以上が好ましく、２ｋｇ／ｃｍ2 以上が特に好まし
い。この水圧は高いほど有機物質（ＴＯＣ、ＣＯＤ）の
低減効果が大きいので、有機物質低減の点からはその上
限は存在しないが、実際の設備では反応塔、配管の耐圧
を考慮し１５ｋｇ／ｃｍ2 以下に制限することが望まれ
る。The water pressure at the inlet of the ejector is an organic substance (TO
C, COD) 1kg / cm
It is preferably at least 2, more preferably at least 2 kg / cm 2 . The higher the water pressure, the greater the effect of reducing organic substances (TOC, COD). Therefore, there is no upper limit in terms of reduction of organic substances, but in actual equipment, the pressure is 15 kg / cm 2 in consideration of the pressure resistance of the reaction tower and piping. It is desirable to limit to:
【００１５】ＵＶ処理塔内の水圧は０．５〜１０ｋｇ／
ｃｍ2 が好ましく、１〜５ｋｇ／ｃｍ2 が特に好まし
い。ＵＶ処理塔内の水圧が高すぎる場合は、ＵＶ処理塔
におけるランプ保護管の耐圧強度を高めるなどの対策が
必要となり、設備コストが増大する。The water pressure in the UV treatment tower is 0.5 to 10 kg /
cm 2 is preferable, and 1 to 5 kg / cm 2 is particularly preferable. If the water pressure in the UV processing tower is too high, it is necessary to take measures such as increasing the pressure resistance of the lamp protection tube in the UV processing tower, and equipment costs increase.
【００１６】被処理水のｐＨ調整は、ＯＨスカベンジャ
である炭酸イオン、重炭酸イオン等が少なく、被処理水
のアルカリ度で表して２０ｐｐｍ以下の場合は特に必要
ないが、アルカリ度が２０ｐｐｍを超える場合は、この
ｐＨを酸性側へ調整しながら処理を行うことが望まれ
る。そのｐＨ値は６以下が好ましく、４．８以下が特に
好ましい。ｐＨ値の下限については、ｐＨ値の必要以上
の低下は薬剤コストを上昇させるので、２程度に止める
のが好ましい。The pH of the water to be treated is not particularly required when the amount of carbonate ions and bicarbonate ions as OH scavengers is small and the alkalinity of the water to be treated is 20 ppm or less, but the alkalinity exceeds 20 ppm. In this case, it is desired to perform the treatment while adjusting the pH to the acidic side. The pH value is preferably 6 or less, particularly preferably 4.8 or less. Regarding the lower limit of the pH value, it is preferable to limit the pH value to about 2 since an unnecessarily lowering of the pH value increases the cost of the drug.
【００１７】紫外線の照射では、オゾンを効果的に分解
できる２５４ｎｍを主波長にもつ低圧水銀ランプが有効
である。この低圧水銀ランプを使用する場合、紫外線照
射量は溶存オゾン１ｇに対して１０〜８０ｗが好まし
く、オゾンの直接反応及び自然分解を考慮すると、オゾ
ン注入量１ｇに対して５〜６０ｗとする方が良い。For UV irradiation, a low-pressure mercury lamp having a main wavelength of 254 nm capable of effectively decomposing ozone is effective. When this low-pressure mercury lamp is used, the irradiation amount of ultraviolet rays is preferably 10 to 80 w per 1 g of dissolved ozone, and in consideration of the direct reaction and spontaneous decomposition of ozone, it is more preferable that the irradiation amount be 5 to 60 w per 1 g of ozone injection. good.
【００１８】また、本発明の水処理装置は、有機物質を
含む被処理水にオゾンガスを注入するエジェクタと、エ
ジェクタから排出される気泡混合状態の被処理水を流通
させ、その流通水に紫外線を照射するＵＶ処理塔とを具
備している。In the water treatment apparatus of the present invention, an ejector for injecting ozone gas into water to be treated containing an organic substance and the water to be treated in a bubble-mixed state discharged from the ejector are circulated. A UV treatment tower for irradiation.
【００１９】ＵＶ処理塔は、紫外線照射を受けるまでの
間におけるオゾンの自然分解を抑えるために、エジェク
タに直結してその下流側に配置することが好ましい。Ｕ
Ｖ処理塔は又、水圧を上げるために、大気圧を超える内
圧を維持できるクローズド形式であることが好ましい。The UV treatment tower is preferably directly connected to the ejector and disposed downstream thereof in order to suppress spontaneous decomposition of ozone before being subjected to ultraviolet irradiation. U
The V treatment tower is also preferably of a closed type capable of maintaining an internal pressure exceeding atmospheric pressure in order to increase the water pressure.
【００２０】[0020]
【発明の実施の形態】以下に本発明の実施形態を図面に
基づいて説明する。図１は本発明の実施形態に係る水処
理装置の構成図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a water treatment apparatus according to an embodiment of the present invention.
【００２１】有機物質（ＴＯＣ、ＣＯＤ）含む被処理
水、具体的には下水２次処理水、工場排水等は、ｐＨ調
整槽１及びエジェクタ２を順番に通過してＵＶ処理塔３
に送られる。ｐＨ調整槽１では、被処理水のｐＨ値が６
以下に調整される。エジェクタ２は、オゾン発生装置４
で発生するオゾンガスを被処理水に注入する。The water to be treated containing organic substances (TOC, COD), specifically the secondary treated water of sewage, factory effluent, etc., passes through the pH adjusting tank 1 and the ejector 2 in this order, and the UV treatment tower 3
Sent to In the pH adjusting tank 1, the pH value of the water to be treated is 6
It is adjusted as follows. The ejector 2 includes an ozone generator 4
Is injected into the water to be treated.
【００２２】ＵＶ処理塔３は、円筒状の密閉容器と、密
閉容器の中心部に挿入された透明な保護管と、保護管内
に挿入されたＵＶランプとを備えている。被処理水は、
密閉容器内に下部から導入され、容器内を上昇する過程
で紫外線を浴びて上部から容器外へ排出される。The UV processing tower 3 includes a cylindrical hermetic container, a transparent protective tube inserted at the center of the hermetic container, and a UV lamp inserted into the protective tube. The water to be treated is
It is introduced into the closed container from the lower part, is exposed to ultraviolet rays in the process of ascending in the container, and is discharged from the upper part to the outside of the container.
【００２３】被処理水の圧力（水圧）は、エジェクタ２
の入側では１ｋｇ／ｃｍ2 以上が確保され、エジェクタ
２で圧力降下を生じるが、ＵＶ処理塔３でも０．５〜１
０ｋｇ／ｃｍ2 が維持されるように調節される。The pressure (water pressure) of the water to be treated is
1 kg / cm 2 or more is secured on the inlet side, and a pressure drop occurs in the ejector 2.
It is adjusted so that 0 kg / cm 2 is maintained.
【００２４】エジェクタ２を出た被処理水は、オゾンが
溶解されると共に、多数の気泡が混合した状態である。
この状態の被処理水がＵＶ処理塔３に流入し、ここで紫
外線を浴びることにより、ＯＨラジカルが効率よく生成
し、そのＯＨラジカルにより被処理水中の有機物質（Ｔ
ＯＣ、ＣＯＤ）が効果的に酸化分解される。The water to be treated that has exited the ejector 2 is in a state where ozone is dissolved and a number of air bubbles are mixed.
The water to be treated in this state flows into the UV treatment tower 3, where it is exposed to ultraviolet rays, whereby OH radicals are efficiently generated, and the OH radicals cause the organic substances (T
OC, COD) are effectively oxidatively decomposed.
【００２５】即ち、エジェクタ２を使用したオゾンガス
の注入により、ガス中のオゾンが被処理水中に効率よく
溶解する。特に、エジェクタ２入側での水圧が２ｋｇ／
ｃｍ2 以上に昇圧されていることにより、そのオゾン溶
解量が多くなる。この被処理水は多量の気泡を同伴した
ままＵＶ処理塔３に導入され、紫外線を照射されること
により、ＯＨラジカルを生成する。That is, by injecting ozone gas using the ejector 2, ozone in the gas is efficiently dissolved in the water to be treated. In particular, the water pressure at the inlet of the ejector 2 is 2 kg /
When the pressure is raised to not less than cm 2 , the dissolved amount of ozone is increased. The water to be treated is introduced into the UV treatment tower 3 while accompanied by a large amount of bubbles, and is irradiated with ultraviolet rays to generate OH radicals.
【００２６】このとき、被処理水中に多量にオゾンが溶
解しているために、ＯＨラジカルの生成効率が向上す
る。有機物質（ＴＯＣ、ＣＯＤ）の分解に伴いオゾンが
消費される。また、一部のオゾンは紫外線の照射により
分解する。しかし、同伴気泡中にオゾンが含まれてお
り、そのオゾンが徐々に被処理水中に溶解して補給され
る。しかも、ＵＶ処理塔３内の水圧が０．５〜１０ｋｇ
／ｃｍ2 と高い。これらのため、被処理水中の有機物質
（ＴＯＣ、ＣＯＤ）が効果的に酸化分解される。At this time, since a large amount of ozone is dissolved in the water to be treated, the generation efficiency of OH radicals is improved. Ozone is consumed with the decomposition of organic substances (TOC, COD). Some ozone is decomposed by irradiation with ultraviolet rays. However, the entrained bubbles contain ozone, and the ozone is gradually dissolved in the water to be treated and supplied. Moreover, the water pressure in the UV treatment tower 3 is 0.5 to 10 kg.
/ Cm 2 and high. For these reasons, organic substances (TOC, COD) in the water to be treated are effectively oxidatively decomposed.
【００２７】使用後のオゾンガスは、ＵＶ処理塔３から
排オゾン分解装置５に送られる。The used ozone gas is sent from the UV treatment tower 3 to the waste ozone decomposer 5.
【００２８】[0028]
【実施例】次に、本発明の実施例を示し、比較例と対比
することにより、本発明の効果を明らかにする。Next, the effects of the present invention will be clarified by showing examples of the present invention and comparing them with comparative examples.
【００２９】本発明の実施例として、図１の水処理装置
により供試液を処理した。供試液は、有機物質としてＴ
ＯＣを７．０ｍｇ／Ｌ含み、ＣＯＤを７．０ｍｇ／Ｌ含
む。エジェクタ入側での水圧は２．５ｋｇ／ｃｍ2 とし
た。ＵＶ処理塔内の水圧は大気圧又は１ｋｇ／ｃｍ2 と
した。また、供試液のｐＨ値は７（未調整）又は４とし
た。紫外線の照射量は、低圧水銀ランプの出力を、オゾ
ン注入量１ｇに対して４０ｗに調整した。As an example of the present invention, a test solution was treated by the water treatment apparatus shown in FIG. The test solution is T as an organic substance.
It contains 7.0 mg / L of OC and 7.0 mg / L of COD. The water pressure at the inlet of the ejector was 2.5 kg / cm 2 . The water pressure in the UV treatment tower was atmospheric pressure or 1 kg / cm 2 . The pH value of the test solution was 7 (not adjusted) or 4. The irradiation amount of the ultraviolet light was adjusted so that the output of the low-pressure mercury lamp was 40 W per 1 g of the ozone injection amount.
【００３０】比較のために、エジェクタとＵＶ処理塔の
間で気泡を除去して供試液をＵＶ処理塔に導入した。ま
た、エジェクタの代わりに散気方式（ディフューザ）を
用いてオゾンガスを供試液に注入した。それぞれの場合
について、処理後の有機物質量を測定した結果を表１に
示す。For comparison, bubbles were removed between the ejector and the UV processing tower, and the test solution was introduced into the UV processing tower. In addition, ozone gas was injected into the test liquid using a diffuser method (diffuser) instead of the ejector. Table 1 shows the results of measuring the amount of the organic substance after the treatment in each case.
【００３１】[0031]
【表１】 [Table 1]
【００３２】表１から分かるように、オゾンガスの注入
にエジェクタを使用し、且つ、ガス注入後の被処理水か
ら同伴気泡を除去しない場合に、有機物質の酸化分解効
果が向上する。ＵＶ処理塔内の水圧を高めたり、供試液
のｐＨ値を４に調整することにより、分解効率が更に上
がり、両者を併用した場合に特に高い分解効率が得られ
る。As can be seen from Table 1, when an ejector is used for injecting ozone gas and entrained bubbles are not removed from the water to be treated after gas injection, the effect of oxidative decomposition of organic substances is improved. By increasing the water pressure in the UV treatment tower or adjusting the pH value of the test solution to 4, the decomposition efficiency is further increased, and particularly high decomposition efficiency can be obtained when both are used in combination.
【００３３】ＵＶ処理塔内の水圧を高めることにより分
解効率が上がるのは、その水圧の上昇に伴ってオゾン溶
解率が上がり、被処理水へのオゾン溶解量が増加するた
め、ＯＨラジカルへの転換量が増えることによる。ま
た、供試液のｐＨ値を酸性側へ調整することにより分解
効率が上がる理由は、ｐＨが酸性側であれば、特に強い
スカベンジャであるＣＯ3 --イオンの生成を抑えること
ができ、ＯＨラジカルを効果的に有機物質と反応させる
ことかできるためである。The reason why the decomposition efficiency is increased by increasing the water pressure in the UV treatment tower is that the ozone dissolution rate increases as the water pressure increases, and the amount of ozone dissolved in the water to be treated increases. Due to increased conversion. Further, the reason why the decomposition efficiency is increased by adjusting the pH value of the test solution to the acidic side is that if the pH is on the acidic side, it is possible to suppress the generation of CO 3 - ions, which are particularly strong scavengers, and the OH radical Can be effectively reacted with an organic substance.
【００３４】[0034]
【発明の効果】以上に説明した通り、本発明の水処理方
法及び装置は、有機物質を含む被処理水にエジェクタに
よりオゾンガスを注入し、気泡混合状態の被処理水に紫
外線を照射することにより、オゾンと紫外線を組み合わ
せてＯＨラジカルを生成する場合の生成効率を高めるこ
とができ、これにより被処理水中の有機物質を効果的に
酸化分解することができる。As described above, the water treatment method and apparatus according to the present invention are characterized in that ozone gas is injected into water to be treated containing an organic substance by an ejector, and the water to be treated in a bubble-mixed state is irradiated with ultraviolet rays. In addition, the generation efficiency when OH radicals are generated by combining ozone and ultraviolet light can be increased, and thereby organic substances in the water to be treated can be effectively oxidized and decomposed.
【図１】本発明の実施形態に係る水処理装置の構成図で
ある。FIG. 1 is a configuration diagram of a water treatment apparatus according to an embodiment of the present invention.
１ ｐＨ調整槽 ２ エジェクタ ３ ＵＶ処理塔 ４ オゾン発生装置 ５ 排オゾン分解装置 DESCRIPTION OF SYMBOLS 1 pH adjustment tank 2 Ejector 3 UV processing tower 4 Ozone generator 5 Waste ozone decomposer
Claims (7)
よりオゾンガスを注入する工程と、エジェクタによるオ
ゾンガス注入でオゾンが溶解した気泡混合状態の被処理
水に紫外線を照射する工程とを包含することを特徴とす
る水処理方法。The method includes a step of injecting ozone gas into water to be treated containing an organic substance by an ejector, and a step of irradiating ultraviolet light to the water to be treated in a bubble-mixed state in which ozone is dissolved by the injection of ozone gas by the ejector. Characterized water treatment method.
ｇ／ｃｍ2 以上とすることを特徴とする請求項１に記載
の水処理方法。2. The water pressure when injecting ozone gas is 1 k.
Water treatment method according to claim 1, characterized in that the g / cm 2 or more.
１０ｋｇ／ｃｍ2 とすることを特徴とする請求項１又は
２に記載の水処理方法。3. The water pressure when irradiating ultraviolet rays is 0.5 to
The water treatment method according to claim 1 or 2, wherein the pressure is 10 kg / cm 2 .
とを特徴とする請求項１、２又は３に記載の水処理方
法。4. The water treatment method according to claim 1, wherein the pH value of the water to be treated is adjusted to 6 or less.
注入するエジェクタと、エジェクタから排出される気泡
混合状態の被処理水を流通させ、その流通水に紫外線を
照射するＵＶ処理塔とを具備することを特徴とする水処
理装置。5. An ejector for injecting ozone gas into water to be treated containing an organic substance, and a UV treatment tower for circulating the water to be treated mixed with bubbles discharged from the ejector and irradiating the circulated water with ultraviolet rays. A water treatment apparatus, comprising:
の下流側に配置されていることを特徴とする請求項５に
記載の水処理装置。6. The water treatment apparatus according to claim 5, wherein the UV treatment tower is directly connected to the ejector and disposed downstream thereof.
持できるクローズド形式であることを特徴とする請求項
５又は６に記載の水処理装置。7. The water treatment apparatus according to claim 5, wherein the UV treatment tower is of a closed type capable of maintaining an internal pressure exceeding atmospheric pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13145098A JP3859866B2 (en) | 1998-04-23 | 1998-04-23 | Water treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13145098A JP3859866B2 (en) | 1998-04-23 | 1998-04-23 | Water treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11300376A true JPH11300376A (en) | 1999-11-02 |
| JP3859866B2 JP3859866B2 (en) | 2006-12-20 |
Family
ID=15058251
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13145098A Expired - Lifetime JP3859866B2 (en) | 1998-04-23 | 1998-04-23 | Water treatment method |
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| Country | Link |
|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000030539A (en) * | 2000-03-06 | 2000-06-05 | 조상휘 | Clean water device of advanced oxidation process |
| JP2002011485A (en) * | 2000-04-26 | 2002-01-15 | Sumitomo Precision Prod Co Ltd | Device and method for treating water |
-
1998
- 1998-04-23 JP JP13145098A patent/JP3859866B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000030539A (en) * | 2000-03-06 | 2000-06-05 | 조상휘 | Clean water device of advanced oxidation process |
| JP2002011485A (en) * | 2000-04-26 | 2002-01-15 | Sumitomo Precision Prod Co Ltd | Device and method for treating water |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3859866B2 (en) | 2006-12-20 |
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