JP3797552B2 - Ultraviolet irradiation treatment method and apparatus - Google Patents
Ultraviolet irradiation treatment method and apparatus Download PDFInfo
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Description
【０００１】
【発明の属する技術分野】
本発明は、排水、河川水などの液体（以下「原水」ということがある）に含まれる有機物、例えば、難分解性ＣＯＤ、有機塩素化合物、ダイオキシン類、環境ホルモン類、発ガン性物質などを紫外線（ＵＶ）により分解する方法、または前記分解方法に用いられる紫外線照射処理装置に関するものである。
【０００２】
【従来の技術】
紫外線を用いた水中有機物分解方法自体は公知であり、例えば、特許文献１では、紫外線によりトリクロロエチレンなどの有機塩素化合物を分解する方法が開示してある。また、Ｏ3、Ｈ2Ｏ2などと組み合わせた処理方法がある。特許文献２では、Ｏ3、Ｈ2Ｏ2などと組み合わせた処理方法が開示してある。また、紫外線照射を効率化する手段としては、特許文献３に示すような、紫外線ランプの周囲にらせん状水路を設ける方法が知られている。しかし、前記公知例における、らせん状水路を有する分解装置は、構造が複雑で製作が困難であり、なおかつ、合成石英製保護管とらせん構成部材との間に隙間ができる。このため、水の一部は隙間を通って短絡し、らせん状に流れないという問題があった。
【０００３】
また、従来の紫外線照射装置では、紫外線照射は水路の片側からのみであり、水への均一照射は、水の撹拌効果に依存するという問題があった。撹拌効果を上げるため水流速を高めて乱流にするなどの手段が採られていたが、逆に滞留時間が減少するという問題があった。このような問題は、波長が短く水透過率が低い紫外線を利用する場合、またはオゾン・有機物などの紫外線吸収率が高い物質を含有する水を処理する場合は特に深刻であった。
【０００４】
【特許文献１】
特開昭６２−１９１０９５号公報
【特許文献２】
特開平１１−３３５７０号公報
【特許文献３】
特開２００２−１１９９８２号公報
【０００５】
【発明が解決しようとする課題】
本発明が解決しようとする課題は、実用が十分可能な簡易な構造で、紫外線照射が確実に行え、かつ紫外線照射のエネルギーが十分利用される紫外線照射装置を提供することである。
【０００６】
【課題を解決するための手段】
本発明は、次の手段により上記の課題を解決することができた。
（１）紫外線光源の周囲にらせん状水路を設け、該らせん状水路における隣接する水路相互の間に空間を設け、らせん状水路の周囲を包囲する反射板を設け、該らせん状水路と反射板の間隔は３０ｍｍ以内とする紫外線照射処理装置に、前記紫外線光源から出て前記水路相互の間の空間を通過した紫外線を前記反射板で反射させて前記らせん状水路の全周囲かららせん状水路内に入射するようにし、前記らせん状水路にオゾン、過酸化水素又は次亜塩素酸ナトリウムを添加したダイオキシン類含有排水である原水を通して有機物を分解することを特徴とする紫外線照射処理方法。
（２）該紫外線照射処理装置のらせん状水路における隣接する水路相互の間の空間に窒素ガスを満たすことを特徴とする前記（１）記載の紫外線照射処理方法。
（３）紫外線光源の周囲にらせん状水路を設けた紫外線照射処理装置において、原水を通して有機物を分解するらせん状水路における隣接する水路相互の間に空間を設け、らせん状水路の周囲を包囲する反射板を設け、該らせん状水路と反射板の間隔は３０ｍｍ以内とし、前記紫外線光源から出て前記水路相互の間の空間を通過した紫外線を前記反射板で反射させて前記らせん状水路の全周囲かららせん状水路内に入射するようにし、前記らせん状水路にオゾン、過酸化水素又は次亜塩素酸ナトリウムを添加したダイオキシン類含有排水である原水を通すことを特徴とする紫外線照射処理装置。
（４）らせん状水路における隣接する水路相互の間の空間に窒素ガスを満たすことを特徴とする前記（３）記載の紫外線照射処理装置。
【０００７】
本発明の紫外線照射装置における水路は、らせん状水路となっており、合成石英、石英、フッ素樹脂などで作られた管をらせん状に変形させることにより構成する。これにより、水路は連続して形成され、水は確実にらせん状に流すことができる。らせん状水路としては、環状が好ましい。
水路は互いに空間を介して配置されており、また、環状水路の周囲（外周側）には反射板が設置されている。これにより、光源から発せられた紫外線は水路の間を通ることができ、さらに周囲の反射板で反射されることにより、水路の反対側面からも入射させることができ、紫外線の利用率を高めることができる。紫外線は水路内外周からほぼ均等に入射するので、水の撹拌に依存することなく、ほぼ均一に照射させることができる。
【０００８】
水路外周に窒素ガスを導入する場合は、酸素に吸収される２００ｎｍ以下の波長、例えば、１８５ｎｍの利用効率を高めることができる。水路洗浄の際は、水路に金属部分が無いため、任意の強酸を用いることができ、洗浄は確実となる。また、チタンなどの高価な金属を用いる必要はない。
以上の効果より、本発明では従来型に比べて簡易な構造で紫外線照射効率を高めることが可能となる。
【０００９】
分解処理工程で採用する方法は、紫外線処理又は促進酸化処理であることが望ましい。ここでいう促進酸化処理とは、被処理水に溶存オゾン、過酸化水素、次亜塩素酸ナトリウム、オゾンガスなどを存在させた状態で紫外線処理すること、または二酸化チタン、鉄イオン担持体などの触媒を水路に存在させた状態で紫外線処理することをいう。
【００１０】
光源としては、公知の紫外線ランプを用いることができる。らせん状水路としては、合成石英、普通石英、フッ素樹脂などからなる管を用いることができる。内径は２０ｍｍ以内が好ましい。反射板としては、アルミニウム又はアルミニウム合金を材料とするものが好ましく、研磨したもの、又は蒸着したものを用いることができる。らせん状水路と反射板の間隔は３０ｍｍ以内であることが好ましい。反射板の形状は、円筒状、角筒状などとすることができる。なお、流体はらせん状水路内にのみ存在しているので、ＵＶランプを取り囲むケーシングは必ずしも設ける必要はない。
【００１１】
【発明の実施の形態】
以下に、本発明の実施の形態を図面に基づいて説明する。なお、実施の形態を説明するための全図において、同一機能を有する構成要素は同一符号を用いて示す。
本発明の具体的構成の一例を図１に基づいて説明する。図１において、原水１は紫外線照射装置２の下部より合成石英製のらせん状水路３に導入され、上部から処理水４として排出される。光源としては低圧水銀ランプ５を用いている。らせん状水路３の周囲（外周側）には、研磨アルミニウム板からなる反射板６が設けられており、水路３の間から入射した紫外線を反射する構造としてある。反射した紫外線は外周側よりらせん状水路３に入射する。なお、図１において７は窒素ガスを示す。
【００１２】
図２は、比較例１などに使用した従来から知られている二重円筒型紫外線照射装置２の縦断面図である。原水１はＵＶランプ５を取り囲む円筒型保護管８中を、単に下部から上部へ上昇して処理水４として装置２外へ排出されるだけである。このため、紫外線照射は水路の片側からのみ行われ、水への均一照射は殆ど期待できない状態であった。
【００１３】
図３は、溶存オゾンを存在させた状態で紫外線処理を行う、促進酸化処理を実施するシステムの概略説明図である。
原水１は、ポンプＰを経てエゼクタ９でオゾンガス１０を注入され、オゾン溶解塔１１中でオゾン１０が原水１中に溶存され、この状態で紫外線照射装置２でＵＶ照射されて促進酸化処理をなされてから、処理水４として排出される。なお、装置２は図１で詳細に説明した本発明の紫外線照射装置２である。
【００１４】
【実施例】
以下に、本発明の具体的実施例を説明するが、本発明はこれに限定されるものではない。
【００１５】
（実施例１）
図1に示す紫外線照射装置を用いて、ＨＣＢ（ヘキサクロロベンゼン）濃度が１０μｇ／リットルの排水を処理した。処理条件及び処理結果を下記に示す。
（処理条件）
紫外線ランプ：低圧水銀ランプ（主波長２５４ｎｍ、入力電力１００Ｗ）
らせん状水路：合成石英製、内径１６ｍｍ、高さ１０００ｍｍ、全長５０００ｍｍ
反射板：研磨アルミニウム板、円筒型
原水流量：１リットル／ｍｉｎ
（処理結果）
処理水ＨＣＢ類濃度：２μｇ／リットル（除去率８０％）
【００１６】
（比較例１）
また、比較例１として、図２に示す二重円筒型装置における結果を下記に示す。
（処理条件）
紫外線ランプ：低圧水銀ランプ（主波長２５４ｎｍ、入力電力１００Ｗ）
水路：幅：１６ｍｍ、全長１０００ｍｍ
原水流量：１リットル／ｍｉｎ
（処理結果）
処理水ＨＣＢ類濃度：６μｇ／リットル（除去率４０％）
【００１７】
（比較例２）
また、比較例２として、図１に示す処理装置において、反射板を設けない場合の結果を下記に示す。
（処理条件）
紫外線ランプ：低圧水銀ランプ（主波長２５４ｎｍ、入力電力１００Ｗ）
らせん水路：合成石英製、内径１６ｍｍ（実施例１と同じ）
反射板：なし
原水流量：１リットル／ｍｉｎ
（処理結果）
処理水ＨＣＢ類濃度：４．５μｇ／リットル（除去率５５％）
【００１８】
以上の結果より、本発明による紫外線処理装置を用いた場合のＨＣＢ分解率は、従来用いられてきたＵＶチャンバーより高く、ＵＶチャンバーとしての性能が高いことが認められた。また、反射板も効果があることが認められた。
【００１９】
（実施例２）
ダイオキシン類濃度が１０００ ｐｇ−ＴＥＱ／リットルである洗煙排水を、図３に示す装置で処理した。ＵＶ処理装置としては図１又は図２に示すＵＶリアクターを用いた。ＵＶランプとしては、入力電力１００Ｗ、主波長１８５、２５４ｎｍのものを用いた。処理条件および処理結果を下記に示す。
（処理条件）
原水流量：１ｍ3／ｄａｙ
オゾン注入率：５０ｍｇ／リットル
紫外線照射装置への循環流量：原水流量の５倍
（処理結果）
図１の紫外線照射装置を用いた場合（本発明）…１ ｐｇ−ＴＥＱ／リットル
以下 （分解率９９．９％以上）
図２の紫外線照射装置を用いた場合（比較例）…９．５ ｐｇ−ＴＥＱ／リッ
トル （分解率９９％）
【００２０】
以上の結果より、本発明による紫外線照射装置では、促進酸化処理においても従来型より分解率が高まることが認められた。
【００２１】
（実施例３）
ジオキサンを５ｐｐｂ含む水を、図１又は図２に示すＵＶ照射装置で処理した。図１では、らせん水路外側に窒素ガスを導入した。また、図２においても保護管とＵＶランプの間に窒素ガスを導入した。ＵＶランプとしては、入力電力５０Ｗ、主波長１８５、２５４ｎｍのものを用いた。処理条件および処理結果を下記に示す。
（処理条件）
原水流量：２００リットル／ｈｒ
（処理結果）
図１の紫外線照射装置を用いた場合（本発明）…１ｐｐｂ
図２の紫外線照射装置を用いた場合（比較例）…３ｐｐｂ
以上の結果より、本発明による紫外線照射装置では、ジオキサンの分解性能も向上することが認められた。
【００２２】
（実施例４）
下水二次処理水中の大腸菌を、図１または図２に示すＵＶ処理装置で処理した。ＵＶランプとしては、入力電力５０Ｗ、主波長１８５、２５４ｎｍのものを用いた。処理条件及び処理結果を下記に示す。
（処理条件）
原水流量：５００リットル／ｈｒ
らせん状水路：フッ素樹脂管
（処理結果）
図１の紫外線照射装置を用いた場合（本発明）…除去率９９．９５％
図２の紫外線照射装置を用いた場合（比較例）…除去率９９．９％
以上の結果より、本発明による紫外線照射装置では、殺菌性能も向上することが認められた。
【００２３】
【発明の効果】
本発明によれば、下記の優れた効果が得られる。
（１）本発明による紫外線照射装置を用いることにより、実用が十分可能な簡易な構成で紫外線照射が確実に行える。
（２）水路はらせん状水路となっており、合成石英、石英、フッ素樹脂などの管をらせん状に変形させることにより製作することができる。これにより、水路に隙間はなく、水は確実にらせん状に流すことができる。
（３）水路は互いに空間を介して配置されており、また、水路周囲（外周）には反射板が設置されている。これにより、光源から発せられた紫外線は水路の間を通ることができ、反射板で反射されることにより、水路の反対側面から入射させることができる。
（４）紫外線は水路外周からほぼ均等に入射するので、水の撹拌に依存することなく、ほぼ均一に照射させることができる。
【図面の簡単な説明】
【図１】本発明による紫外線照射装置の概略図を示す。
【図２】比較例の紫外線照射装置の概略図を示す。
【図３】本発明による紫外線照射装置の利用形態の一例を示す概略図。
【符号の説明】
１ 原水
２ 紫外線照射装置
３ らせん状水路
４ 処理水
５ ＵＶランプ
６ 反射板
７ 窒素ガス
８ 保護管
９ エゼクタ
１０ オゾンガス
１１ オゾン溶解塔[0001]
BACKGROUND OF THE INVENTION
The present invention, wastewater, organic substances contained in river water of which liquid (hereinafter sometimes referred to as "raw"), for example, persistent COD, organic chlorine compounds, dioxins, environmental hormones, and carcinogens The present invention relates to a method of decomposing by ultraviolet rays (UV) or an ultraviolet irradiation treatment apparatus used for the decomposition method .
[0002]
[Prior art]
A method for decomposing organic substances in water using ultraviolet rays is known per se. For example,
[0003]
Moreover, in the conventional ultraviolet irradiation device, ultraviolet irradiation is only from one side of the water channel, and there is a problem that uniform irradiation to water depends on the stirring effect of water. In order to increase the stirring effect, measures such as increasing the water flow rate to make the turbulent flow have been taken, but there is a problem that the residence time is reduced. Such a problem is particularly serious when ultraviolet rays having a short wavelength and a low water transmittance are used, or when water containing a substance having a high ultraviolet absorption rate such as ozone / organic matter is treated.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 62-191095 [Patent Document 2]
Japanese Patent Laid-Open No. 11-33570 [Patent Document 3]
Japanese Patent Application Laid-Open No. 2002-119882
[Problems to be solved by the invention]
The problem to be solved by the present invention is to provide an ultraviolet irradiation device that has a simple structure that can be practically used, can reliably perform ultraviolet irradiation, and can sufficiently use the energy of ultraviolet irradiation.
[0006]
[Means for Solving the Problems]
The present invention was able to solve the above problems by the following means.
(1) A spiral water channel is provided around the ultraviolet light source, a space is provided between adjacent water channels in the spiral water channel, and a reflector surrounding the spiral water channel is provided . The spiral water channel and the reflector In the ultraviolet irradiation processing apparatus having an interval of 30 mm or less, the ultraviolet light that has exited from the ultraviolet light source and passed through the space between the water channels is reflected by the reflector so that the entire inside of the spiral water channel is reflected from the entire circumference And the organic matter is decomposed through raw water, which is dioxin-containing wastewater in which ozone, hydrogen peroxide or sodium hypochlorite is added to the spiral water channel .
(2) The ultraviolet irradiation treatment method according to (1), wherein a nitrogen gas is filled in a space between adjacent water channels in the spiral water channel of the ultraviolet irradiation processing apparatus .
(3) In an ultraviolet irradiation processing apparatus provided with a spiral water channel around an ultraviolet light source, a space is provided between adjacent water channels in the spiral water channel that decomposes organic matter through raw water, and the reflection surrounds the spiral water channel. A plate is provided, and the distance between the spiral water channel and the reflection plate is within 30 mm, and the entire circumference of the spiral water channel is reflected by reflecting the ultraviolet light emitted from the ultraviolet light source and passing through the space between the water channels with the reflection plate. An ultraviolet irradiation treatment apparatus, wherein raw water which is dioxin-containing wastewater to which ozone, hydrogen peroxide or sodium hypochlorite is added is allowed to enter the spiral water channel.
(4) The ultraviolet irradiation processing apparatus according to (3), wherein a space between adjacent water channels in the spiral water channel is filled with nitrogen gas .
[0007]
The water channel in the ultraviolet irradiation apparatus of the present invention is a spiral water channel, and is configured by deforming a tube made of synthetic quartz, quartz, fluororesin or the like into a spiral shape. Thereby, a water channel is formed continuously and water can be surely made to flow spirally. As the spiral water channel, an annular shape is preferable.
The water channels are arranged with a space between each other, and a reflector is installed around the outer periphery of the annular water channel. As a result, the ultraviolet rays emitted from the light source can pass between the water channels, and can be incident from the opposite side of the water channel by being reflected by the surrounding reflector, thereby increasing the utilization rate of the ultraviolet rays. Can do. Since the ultraviolet light is incident almost uniformly from the outer periphery of the water channel, it can be irradiated almost uniformly without depending on the stirring of the water.
[0008]
When nitrogen gas is introduced into the outer periphery of the water channel, it is possible to increase the utilization efficiency of a wavelength of 200 nm or less, for example, 185 nm, which is absorbed by oxygen. When cleaning the water channel, since there is no metal portion in the water channel, any strong acid can be used, and the cleaning is ensured. Further, it is not necessary to use an expensive metal such as titanium.
From the above effects, the present invention can increase the ultraviolet irradiation efficiency with a simple structure as compared with the conventional type.
[0009]
The method employed in the decomposition treatment step is preferably ultraviolet treatment or accelerated oxidation treatment. The accelerated oxidation treatment referred to here is an ultraviolet treatment in the presence of dissolved ozone, hydrogen peroxide, sodium hypochlorite, ozone gas, etc. in the water to be treated, or a catalyst such as titanium dioxide or iron ion carrier. Is treated with ultraviolet rays in a state where the water is present in the water channel.
[0010]
A known ultraviolet lamp can be used as the light source. As the spiral water channel, a tube made of synthetic quartz, ordinary quartz, fluororesin, or the like can be used. The inner diameter is preferably within 20 mm. As the reflector, a material made of aluminum or an aluminum alloy is preferable, and a polished or vapor-deposited material can be used. The distance between the spiral water channel and the reflector is preferably within 30 mm. The shape of the reflecting plate can be a cylindrical shape, a rectangular tube shape, or the like. In addition, since the fluid exists only in the spiral channel, it is not always necessary to provide a casing surrounding the UV lamp.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiments.
An example of a specific configuration of the present invention will be described with reference to FIG. In FIG. 1,
[0012]
FIG. 2 is a longitudinal sectional view of a conventionally known double cylindrical
[0013]
FIG. 3 is a schematic explanatory diagram of a system that performs an accelerated oxidation treatment in which ultraviolet treatment is performed in the presence of dissolved ozone.
The
[0014]
【Example】
Specific examples of the present invention will be described below, but the present invention is not limited thereto.
[0015]
Example 1
Using the ultraviolet irradiation apparatus shown in FIG. 1, waste water having an HCB (hexachlorobenzene) concentration of 10 μg / liter was treated. The processing conditions and processing results are shown below.
(Processing conditions)
UV lamp: Low-pressure mercury lamp (main wavelength 254 nm, input power 100 W)
Spiral channel: Made of synthetic quartz, inner diameter 16mm, height 1000mm, total length 5000mm
Reflector: Polished aluminum plate, cylindrical raw water flow rate: 1 liter / min
(Processing result)
Treated water HCB concentration: 2 μg / liter (removal rate 80%)
[0016]
(Comparative Example 1)
Further, as Comparative Example 1, the results in the double cylindrical apparatus shown in FIG.
(Processing conditions)
UV lamp: Low-pressure mercury lamp (main wavelength 254 nm, input power 100 W)
Waterway: width: 16mm, total length 1000mm
Raw water flow rate: 1 liter / min
(Processing result)
Treated water HCB concentration: 6 μg / liter (removal rate 40%)
[0017]
(Comparative Example 2)
Moreover, as a comparative example 2, the result in the case where no reflecting plate is provided in the processing apparatus shown in FIG. 1 is shown below.
(Processing conditions)
UV lamp: Low-pressure mercury lamp (main wavelength 254 nm, input power 100 W)
Spiral water channel: synthetic quartz, inner diameter 16 mm (same as Example 1)
Reflector: None Raw water flow rate: 1 liter / min
(Processing result)
Treated water HCB concentration: 4.5 μg / liter (removal rate 55%)
[0018]
From the above results, it was confirmed that the HCB decomposition rate when using the ultraviolet ray processing apparatus according to the present invention was higher than that of the conventionally used UV chamber, and the performance as a UV chamber was high. Moreover, it was recognized that a reflector is also effective.
[0019]
(Example 2)
Smoke-washed wastewater having a dioxin concentration of 1000 pg-TEQ / liter was treated with the apparatus shown in FIG. The UV reactor shown in FIG. 1 or 2 was used as the UV processing apparatus. A UV lamp having an input power of 100 W and a dominant wavelength of 185 and 254 nm was used. Processing conditions and processing results are shown below.
(Processing conditions)
Raw water flow rate: 1m 3 / day
Ozone injection rate: 50 mg / liter Circulation flow rate to UV irradiation device: 5 times the raw water flow rate (treatment result)
When the ultraviolet irradiation device of FIG. 1 is used (the present invention) ... 1 pg-TEQ / liter or less (decomposition rate of 99.9% or more)
When the ultraviolet irradiation device of FIG. 2 is used (comparative example) 9.5 pg-TEQ / liter (decomposition rate 99%)
[0020]
From the above results, it was confirmed that the ultraviolet irradiation apparatus according to the present invention has a higher decomposition rate than the conventional type even in the accelerated oxidation treatment.
[0021]
Example 3
Water containing 5 ppb of dioxane was treated with the UV irradiation apparatus shown in FIG. 1 or FIG. In FIG. 1, nitrogen gas was introduced outside the spiral water channel. Also in FIG. 2, nitrogen gas was introduced between the protective tube and the UV lamp. A UV lamp having an input power of 50 W and a dominant wavelength of 185 and 254 nm was used. Processing conditions and processing results are shown below.
(Processing conditions)
Raw water flow rate: 200 l / hr
(Processing result)
When the ultraviolet irradiation device of FIG. 1 is used (the present invention) ... 1 ppb
When using the ultraviolet irradiation device of FIG. 2 (comparative example) 3 ppb
From the above results, it was confirmed that the decomposition performance of dioxane was also improved in the ultraviolet irradiation device according to the present invention.
[0022]
(Example 4)
Escherichia coli in the sewage secondary treated water was treated with the UV treatment apparatus shown in FIG. 1 or FIG. A UV lamp having an input power of 50 W and a dominant wavelength of 185 and 254 nm was used. The processing conditions and processing results are shown below.
(Processing conditions)
Raw water flow rate: 500 l / hr
Spiral water channel: Fluoropolymer pipe (treatment result)
When using the ultraviolet irradiation device of FIG. 1 (the present invention) ... removal rate 99.95%
When using the ultraviolet irradiation device of FIG. 2 (comparative example) ... removal rate 99.9%
From the above results, it was confirmed that the sterilization performance was also improved in the ultraviolet irradiation device according to the present invention.
[0023]
【The invention's effect】
According to the present invention, the following excellent effects can be obtained.
(1) By using the ultraviolet irradiation apparatus according to the present invention, ultraviolet irradiation can be reliably performed with a simple configuration that can be practically used.
(2) The water channel is a spiral channel and can be manufactured by deforming a tube made of synthetic quartz, quartz, fluororesin or the like into a spiral shape. As a result, there is no gap in the water channel, and water can flow reliably in a spiral shape.
(3) The water channels are arranged with a space therebetween, and a reflector is installed around the water channel (outer periphery). Thereby, the ultraviolet-ray emitted from the light source can pass between water channels, and can be entered from the opposite side surface of a water channel by being reflected by a reflecting plate.
(4) Since the ultraviolet rays are incident almost uniformly from the outer periphery of the water channel, they can be irradiated almost uniformly without depending on the stirring of the water.
[Brief description of the drawings]
FIG. 1 shows a schematic view of an ultraviolet irradiation apparatus according to the present invention.
FIG. 2 is a schematic view of an ultraviolet irradiation device of a comparative example.
FIG. 3 is a schematic diagram showing an example of a usage pattern of an ultraviolet irradiation device according to the present invention.
[Explanation of symbols]
DESCRIPTION OF
Claims (4)
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| JP2002257662A JP3797552B2 (en) | 2002-09-03 | 2002-09-03 | Ultraviolet irradiation treatment method and apparatus |
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| JP2002257662A JP3797552B2 (en) | 2002-09-03 | 2002-09-03 | Ultraviolet irradiation treatment method and apparatus |
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| JP2004089941A JP2004089941A (en) | 2004-03-25 |
| JP2004089941A5 JP2004089941A5 (en) | 2005-06-09 |
| JP3797552B2 true JP3797552B2 (en) | 2006-07-19 |
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Cited By (2)
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| CN102381740A (en) * | 2011-11-02 | 2012-03-21 | 哈尔滨工业大学 | Method for removing nitrogenous disinfection byproducts in water on basis of persulfate/light combination |
| CN101785961B (en) * | 2010-02-09 | 2012-06-27 | 浙江工业大学 | Spiral photo-reactor used for waste gas treatment and waste gas treatment process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4688069B2 (en) * | 2007-03-14 | 2011-05-25 | 岩崎電気株式会社 | Method and apparatus for decomposing 1,4-dioxane |
| CN102730790B (en) * | 2011-04-01 | 2014-07-30 | 上海嘉洲环保机电设备有限责任公司 | Light-filtering type ultraviolet irradiation inactivated device |
| JP6244080B2 (en) * | 2012-02-06 | 2017-12-06 | 千代田工販株式会社 | UV irradiation equipment |
| CN103896362A (en) * | 2014-02-28 | 2014-07-02 | 芜湖美的厨卫电器制造有限公司 | Water heater and ultraviolet sterilization device thereof |
| JP2018122044A (en) * | 2017-02-03 | 2018-08-09 | 千代田工販株式会社 | Air bubble stirring type ultraviolet irradiation method and device |
| JP6654782B2 (en) * | 2017-03-30 | 2020-02-26 | 株式会社ＭｉＣｈＳ | Photoreactor and photoreactor |
| CN110407284B (en) * | 2019-07-09 | 2022-01-14 | 扬州大学 | All-weather visible light photocatalytic wastewater degradation device and method |
| JP2022013480A (en) * | 2020-07-01 | 2022-01-18 | 宣夫 大山 | Uvc radiation processing vessel |
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2002
- 2002-09-03 JP JP2002257662A patent/JP3797552B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101785961B (en) * | 2010-02-09 | 2012-06-27 | 浙江工业大学 | Spiral photo-reactor used for waste gas treatment and waste gas treatment process |
| CN102381740A (en) * | 2011-11-02 | 2012-03-21 | 哈尔滨工业大学 | Method for removing nitrogenous disinfection byproducts in water on basis of persulfate/light combination |
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