JPH0523680A - Treatment and device for photooxidation - Google Patents
Treatment and device for photooxidationInfo
- Publication number
- JPH0523680A JPH0523680A JP3201070A JP20107091A JPH0523680A JP H0523680 A JPH0523680 A JP H0523680A JP 3201070 A JP3201070 A JP 3201070A JP 20107091 A JP20107091 A JP 20107091A JP H0523680 A JPH0523680 A JP H0523680A
- Authority
- JP
- Japan
- Prior art keywords
- water
- treated
- reverse osmosis
- osmosis membrane
- fine particles
- 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.)
- Pending
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Physical Water Treatments (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、二酸化チタンなどの
半導体微粒子を触媒とした光酸化処理方法とその装置に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photooxidation treatment method and apparatus using semiconductor fine particles such as titanium dioxide as a catalyst.
【０００２】[0002]
【従来の技術】ハロゲン、有機物等を含む廃水及びプー
ル水、飲料水等は活性汚泥、酸化分解等によって分解処
理されてきたが、これら既存の処理方法は長時間と広大
なスペースを必要とするため、合理的な方法とは言い難
く、またプール水等の殺菌には従来塩素などの薬品処理
が行なわれてきたが、薬品による殺菌処理は人体への影
響から手控えられる傾向にある。2. Description of the Related Art Wastewater containing halogen, organic substances, etc., pool water, drinking water, etc. have been decomposed by activated sludge, oxidative decomposition, etc., but these existing treatment methods require a long time and a vast space. Therefore, it cannot be said to be a rational method, and although chemical treatments such as chlorine have been conventionally performed for sterilizing pool water and the like, sterilization treatments by chemicals tend to be refrained from the influence on the human body.
【０００３】これに対して、紫外線を利用した被処理水
の殺菌は、薬品殺菌法と異なり、人体への影響が殆ど無
く効果的に難分解ハロゲンを含む廃水などの分解処理と
殺菌処理が同時にできるなどの特性があり、種々の生産
分野に応用され、需要は増大されつつある。On the other hand, unlike the chemical sterilization method, the sterilization of water to be treated utilizing ultraviolet rays has almost no effect on the human body and effectively decomposes waste water containing hardly-decomposable halogens and sterilization at the same time. Since it has characteristics such as being able to be applied, it is applied to various production fields, and the demand is increasing.
【０００４】この紫外線を利用した殺菌法として最も効
率が良いとされるのは、外周を保護管で被覆した紫外線
ランプを両端を開放した処理タンク内に挿入するととも
に、処理タンクの両端には被処理水の給水管乃至排水管
に接続するようにした光触媒反応槽を使用して、被処理
水が紫外線ランプの周囲を通過する間に難分解ハロゲン
の分解と殺菌を同時に行なう方法である。The most efficient sterilization method using ultraviolet rays is that an ultraviolet lamp whose outer periphery is covered with a protective tube is inserted into a processing tank whose both ends are open, and both ends of the processing tank are covered. This is a method of simultaneously decomposing and sterilizing hardly decomposed halogen while the water to be treated passes around the ultraviolet lamp by using a photocatalytic reaction tank connected to a water supply pipe or a drain pipe of the treated water.
【０００５】一方、これら紫外線に照射される被処理水
中に二酸化チタン等の微粒子を懸濁させると、これら微
粒子の触媒作用により更に効果的な分解処理と殺菌処理
が同時に行なわれることが知られている。On the other hand, it is known that when fine particles such as titanium dioxide are suspended in the water to be treated which is irradiated with ultraviolet rays, a more effective decomposition treatment and sterilization treatment are simultaneously performed by the catalytic action of these fine particles. There is.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上述の
ように二方法を組み合わせ、被処理水中に二酸化チタン
等の微粒子を懸濁させて紫外線ランプの周囲を通過させ
て分解浄化殺菌処理を行なう場合には、処理後の水中か
ら二酸化チタン微粒子を分離、回収するのが極めて困難
であり、またこれら二酸化チタン微粒子を完全に分離、
回収するには大型の分離装置を必要とするなどの難点が
ある。However, when the two methods are combined as described above and fine particles such as titanium dioxide are suspended in the water to be treated and passed around the ultraviolet lamp to carry out the decomposition purification sterilization treatment. Is extremely difficult to separate and recover titanium dioxide fine particles from the treated water, and these titanium dioxide fine particles are completely separated,
There is a problem that a large-scale separation device is required for recovery.
【０００７】また、二酸化チタン等の微粒子は各種の膜
によって分離し、濃縮液と同時に回収されて再利用する
場合には、膜に目詰まりが生じないように定期的に膜を
洗浄しなけらばならない。When fine particles of titanium dioxide or the like are separated by various kinds of membranes and are recovered and reused at the same time as the concentrated liquid, the membranes should be regularly washed so as not to cause clogging of the membranes. I have to.
【０００８】この発明は、上記実情に鑑み、被処理水中
に二酸化チタン等の微粒子を懸濁させて紫外線ランプの
周囲を通過させて紫外線照射処理を行なうに際して処理
後の水中に含まれる二酸化チタン等の微粒子を分離、回
収する方法とその装置を提案することを目的とする。In view of the above situation, the present invention suspends fine particles of titanium dioxide or the like in the water to be treated and passes them around the ultraviolet lamp to carry out the ultraviolet irradiation treatment, so that titanium dioxide or the like contained in the water after the treatment. The object of the present invention is to propose a method and an apparatus for separating and recovering the above fine particles.
【０００９】[0009]
【課題を解決するための手段】以上の課題を解決するた
めに、この発明では紫外線照射ランプを挿入した反応槽
と逆浸透膜を備えた１又は２以上の分離槽を並設し、反
応槽には二酸化チタン等の触媒微粒子を懸濁させた被処
理水を送入し、同時に上記ランプより紫外線を照射して
触媒微粒子により被処理水を分解浄化殺菌、処理し、次
に被処理水を分離槽に送入し、逆浸透膜を通過させるこ
とにより被処理水中に含まれる触媒微粒子を捕集し、更
に逆浸透膜には前記被処理水の通水方向とは逆方向に洗
浄水を通水し、逆浸透膜に捕集された触媒微粒子を分離
し、分離された触媒微粒子を含む洗浄水の全部又は一部
を必要とあれば上記反応槽に戻すようにした光酸化処理
方法とその装置を提案するものである。In order to solve the above problems, according to the present invention, a reaction tank in which an ultraviolet irradiation lamp is inserted and one or more separation tanks provided with a reverse osmosis membrane are installed in parallel, Is fed with water to be treated in which catalyst fine particles such as titanium dioxide are suspended, and at the same time is irradiated with ultraviolet rays from the lamp to decompose and purify the water to be treated by the catalyst fine particles, and then to treat the water to be treated. The catalyst fine particles contained in the water to be treated are collected by being sent to the separation tank and passing through the reverse osmosis membrane, and the reverse osmosis membrane is further provided with washing water in the direction opposite to the water flow direction of the water to be treated. A photo-oxidation treatment method in which water is passed and the catalyst fine particles collected in the reverse osmosis membrane are separated, and all or part of the washing water containing the separated catalyst fine particles is returned to the reaction tank if necessary. The device is proposed.
【００１０】この発明で使用する逆浸透膜は、例えば溶
液中の数 〜数百 の粒径の粒子をを通過させない半透
膜であり、その使用圧力は溶液1,000ppmに対し0.6 〜0.
8Kg/cm2 程度である。The reverse osmosis membrane used in the present invention is, for example, a semipermeable membrane that does not allow particles having a particle size of several to several hundreds in a solution to pass therethrough, and the working pressure thereof is 0.6 to 0.1 per 1,000 ppm of the solution.
It is about 8 kg / cm 2 .
【００１１】この発明では二酸化チタン等の触媒微粒子
を懸濁させた被処理水は処理槽内で紫外線照射されて処
理され、次に被処理水は分離槽に送入して逆浸透膜を通
過させることにより、触媒微粒子は逆浸透膜の細孔内に
捕集される。更に逆浸透膜には前記被処理水の通水方向
とは逆方向に洗浄水を通水すると、逆浸透膜の細孔内に
捕集された触媒微粒子は分離される。そして、触媒微粒
子を含む洗浄水の一部又は全部は例えば処理槽に戻して
触媒微粒子を再利用するものである。In this invention, the water to be treated in which fine particles of catalyst such as titanium dioxide are suspended is irradiated with ultraviolet rays in the treatment tank to be treated, and then the water to be treated is fed into the separation tank and passed through the reverse osmosis membrane. By doing so, the catalyst fine particles are trapped in the pores of the reverse osmosis membrane. Further, when washing water is passed through the reverse osmosis membrane in a direction opposite to the direction of the water to be treated, the catalyst fine particles trapped in the pores of the reverse osmosis membrane are separated. Then, a part or all of the washing water containing the catalyst fine particles is returned to, for example, the processing tank to reuse the catalyst fine particles.
【００１２】即ち、この発明では逆浸透膜を用いて、光
酸化処理法に用いる二酸化チタン等の触媒微粒子を効果
的に分離、回収することができるのである。That is, in the present invention, the reverse osmosis membrane can be used to effectively separate and recover the catalyst fine particles such as titanium dioxide used in the photooxidation treatment method.
【００１３】なお、この発明においては逆浸透膜の型式
としては、市販されているチューブラー型、マルチチュ
ーブ型、プレート型、スパイラル型、ホローファイバー
型等を使用することができる。In the present invention, as the type of the reverse osmosis membrane, commercially available tubular type, multi-tube type, plate type, spiral type, hollow fiber type and the like can be used.
【００１４】また、被処理水の種類によっては２以上の
分離槽のうちの一部を限外濾過膜を備えた分離槽に置き
換えるようにしてもよい。Depending on the type of water to be treated, a part of the two or more separation tanks may be replaced with a separation tank having an ultrafiltration membrane.
【００１５】更に、紫外線照射ランプとしては、高圧水
銀灯、中圧水銀灯、低圧水銀灯等を被処理水の種類に応
じて使用することができる。Further, as the ultraviolet irradiation lamp, a high pressure mercury lamp, a medium pressure mercury lamp, a low pressure mercury lamp or the like can be used depending on the type of water to be treated.
【００１６】[0016]
【実施例】以下、この発明を図示の実施例に基づいて説
明する。図１は、この発明の一実施例を示すもので、１
は、上部に給水口２、下部に排水口３を有する反応槽
で、反応槽１の外周にはヒータ４が設けられ、反応槽１
の内部にはその外周に石英製の保護管５を設けた紫外線
ランプ６を挿入する。なお、反応槽１の底部或は側部に
は攪拌装置Ｍが設けられている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the illustrated embodiments. FIG. 1 shows an embodiment of the present invention.
Is a reaction tank having a water supply port 2 in the upper part and a drain port 3 in the lower part.
An ultraviolet lamp 6 having a quartz protective tube 5 provided on the outer periphery thereof is inserted into the inside of the container. A stirrer M is provided at the bottom or side of the reaction tank 1.
【００１７】７は分離槽で、分離槽７内にはその中央に
両端を開放した通水路８を有する逆浸透膜９を設け、ま
た分離槽７の底部には通水路８の下端に接続する給水口
10を設け、更に逆浸透膜９の上端部に対応する分離槽７
の上部には排水管11を設ける。A separation tank 7 is provided with a reverse osmosis membrane 9 having a water passage 8 whose both ends are open in the center of the separation tank 7, and the bottom of the separation tank 7 is connected to the lower end of the water passage 8. Water inlet
10 is provided, and further the separation tank 7 corresponding to the upper end of the reverse osmosis membrane 9
A drainage pipe 11 is provided on the upper part of.
【００１８】一方、反応槽１の排水口３と分離槽７の給
水口11との間には下部連絡路12を設け、連絡路12には圧
送ポンプ13を介在させる。On the other hand, a lower communication path 12 is provided between the drainage port 3 of the reaction tank 1 and the water supply port 11 of the separation tank 7, and a pressure pump 13 is interposed in the communication path 12.
【００１９】また、逆浸透膜９の通水路８の上端と反応
槽１の上部との間にはバルブ15によって切り替えられる
分岐路16を設け、この分岐路16の上端を上部連絡路14に
接続する。A branch passage 16 which is switched by a valve 15 is provided between the upper end of the water passage 8 of the reverse osmosis membrane 9 and the upper portion of the reaction tank 1, and the upper end of the branch passage 16 is connected to the upper connecting passage 14. To do.
【００２０】以上のような光酸化処理装置において、被
処理水は給水口２より反応槽１に供給され、ここで二酸
化チタン等の触媒微粒子17, …を加える。反応槽１内で
は攪拌装置Ｍにより触媒微粒子17, …が水中に懸濁され
る。また、ヒータ４により加温され、このような状態で
紫外線ランプ６に沿って流下し、この間紫外線照射を受
けるとともに、二酸化チタンの微粒子の触媒作用により
被処理水中の有機物の分解、殺菌処理等が行なわれる。In the photooxidation treatment apparatus as described above, the water to be treated is supplied from the water supply port 2 to the reaction tank 1, where catalyst fine particles 17, such as titanium dioxide, are added. In the reaction tank 1, the catalyst fine particles 17, ... Are suspended in water by the stirring device M. Further, while being heated by the heater 4, it flows down along the ultraviolet lamp 6 in such a state, is irradiated with ultraviolet light during this time, and decomposes and sterilizes organic matter in the water to be treated by the catalytic action of fine particles of titanium dioxide. Done.
【００２１】処理された水は、圧送ポンプ13により下部
連絡路12を通って逆浸透膜９の通水路８に送られる。The treated water is sent to the water passage 8 of the reverse osmosis membrane 9 through the lower connecting passage 12 by the pressure feed pump 13.
【００２２】通水路８に送られた水の一部は逆浸透膜９
の細孔9aを通って逆浸透膜９の外側に脱出し、この間に
水中に含まれる触媒微粒子17, …は細孔9aに捕集され
る。逆浸透膜９を脱出した水は排水管11を通って外部に
排出される。A part of the water sent to the water passage 8 is a reverse osmosis membrane 9
Through the pores 9a to escape to the outside of the reverse osmosis membrane 9, and during this time, the catalyst fine particles 17, ... contained in the water are collected in the pores 9a. The water that has escaped from the reverse osmosis membrane 9 is discharged to the outside through the drain pipe 11.
【００２３】また、通水路８に送られた水の残部は上部
連絡路14を通って反応槽１に戻される。なお、排水管11
を通って外部に排出される水の量と反応槽１に戻される
水の量の比は例えば６：４とする。The rest of the water sent to the water passage 8 is returned to the reaction tank 1 through the upper connecting passage 14. The drain pipe 11
The ratio of the amount of water discharged to the outside through the water and the amount of water returned to the reaction tank 1 is, for example, 6: 4.
【００２４】次に、洗浄水を逆浸透膜９の外側に圧送す
る。圧送された洗浄水は細孔9aを通って通水路８内に圧
送されるが、この間に細孔9aに捕集されていた触媒微粒
子17, …を解放する。Next, the wash water is pumped to the outside of the reverse osmosis membrane 9. The wash water sent under pressure is sent through the pores 9a into the water passage 8 while releasing the catalyst fine particles 17, ... Collected in the pores 9a.
【００２５】このようにして触媒微粒子17, …を含む洗
浄水が通水路８に送られるが、これはそのまま外部に取
り出して触媒微粒子17, …を回収してもよいが、バルブ
15を開いてこの洗浄水を分岐路16、 上部連絡路14を通っ
て反応槽１に戻すようにしてもよい。In this way, the cleaning water containing the catalyst fine particles 17, ... Is sent to the water passage 8. This may be taken out as it is to recover the catalyst fine particles 17 ,.
You may make it open 15 and return this washing water to the reaction tank 1 through the branch path 16 and the upper connection path 14.
【００２６】[0026]
【発明の効果】以上要するに、この発明によれば被処理
水中に二酸化チタン等の微粒子を懸濁させて赤外線ラン
プの周囲を通過させて紫外線照射処理を行なうに際して
処理後の水中に含まれる二酸化チタン等の微粒子を分
離、回収が効率的に行なうことができる。In summary, according to the present invention, fine particles such as titanium dioxide are suspended in the water to be treated and passed through the periphery of the infrared lamp to carry out the ultraviolet irradiation treatment, so that the titanium dioxide contained in the treated water is treated. It is possible to efficiently separate and collect fine particles such as.
【図１】この発明の一実施例を示す概略図FIG. 1 is a schematic view showing an embodiment of the present invention.
【図２】同上の要部拡大図FIG. 2 is an enlarged view of the main part of the above.
１ 反応槽 ７ 分離槽 ９ 逆浸透膜 13 圧送ポンプ 17，… 触媒微粒子 1 reaction tank 7 separation tanks 9 Reverse osmosis membrane 13 Pressure pump 17,… Catalyst fine particles
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０２Ｆ 1/44 Ｈ 8014−4Ｄ Ｋ 8014−4Ｄ 9/00 Ｚ 6647−4Ｄ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display location C02F 1/44 H 8014-4D K 8014-4D 9/00 Z 6647-4D
Claims (3)
浸透膜を備えた１又は２以上の分離槽を並設し、反応槽
には触媒微粒子を懸濁させた被処理水を送入し、同時に
上記ランプより紫外線を照射して触媒微粒子により被処
理水を浄化、処理し、次に被処理水を分離槽に送入し、
逆浸透膜を通過させることにより被処理水中に含まれる
触媒微粒子を捕集し、更に逆浸透膜には前記被処理水の
通水方向とは逆方向に洗浄水を通水し、逆浸透膜に捕集
された触媒微粒子を分離し、分離された触媒微粒子を含
む洗浄水の全部または一部を必要とあれば上記反応槽に
戻すようにしたことを特徴とする光酸化処理方法。1. A reaction tank in which an ultraviolet irradiation lamp is inserted and one or more separation tanks equipped with a reverse osmosis membrane are provided side by side, and water to be treated in which catalyst fine particles are suspended is fed into the reaction tank. At the same time, ultraviolet rays are emitted from the lamp to purify and treat the water to be treated with catalyst fine particles, and then the water to be treated is fed into a separation tank,
Catalytic fine particles contained in the water to be treated are collected by passing through the reverse osmosis membrane, and further, wash water is passed through the reverse osmosis membrane in a direction opposite to the water flow direction of the water to be treated. A method for photooxidation treatment, characterized in that the catalyst fine particles collected in (1) are separated, and all or part of the washing water containing the separated catalyst fine particles is returned to the above reaction tank if necessary.
えた分離槽に置き換えるようにした特許請求の範囲第１
項記載の方法。2. The method according to claim 1, wherein a part of the two or more separation tanks is replaced with a separation tank equipped with an ultrafiltration membrane.
Method described in section.
浸透膜を備えた分離槽を圧送ポンプを介して並設するよ
うにした光酸化処理装置。3. A photo-oxidation treatment apparatus in which a reaction tank having an ultraviolet irradiation lamp inserted therein and a separation tank having a reverse osmosis membrane are arranged side by side via a pressure pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3201070A JPH0523680A (en) | 1991-07-17 | 1991-07-17 | Treatment and device for photooxidation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3201070A JPH0523680A (en) | 1991-07-17 | 1991-07-17 | Treatment and device for photooxidation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0523680A true JPH0523680A (en) | 1993-02-02 |
Family
ID=16434894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3201070A Pending JPH0523680A (en) | 1991-07-17 | 1991-07-17 | Treatment and device for photooxidation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0523680A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06328068A (en) * | 1993-05-20 | 1994-11-29 | Agency Of Ind Science & Technol | Waste water treatment device using photocatalyst |
| CN105330074A (en) * | 2015-11-30 | 2016-02-17 | 无锡工源机械有限公司 | Air flotation equipment |
| US9555374B2 (en) | 2009-04-29 | 2017-01-31 | Basf Se | Method for conditioning catalysts by means of membrane filtration |
| JP2018043231A (en) * | 2016-09-08 | 2018-03-22 | パナソニックＩｐマネジメント株式会社 | Liquid treatment method and liquid treatment device |
| KR20210043122A (en) * | 2019-10-11 | 2021-04-21 | (주)신산 | Non-degradable Waste Water Treatment Apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02298393A (en) * | 1989-05-15 | 1990-12-10 | Raizaa Kogyo Kk | Photo-oxidation treatment method and apparatus |
-
1991
- 1991-07-17 JP JP3201070A patent/JPH0523680A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02298393A (en) * | 1989-05-15 | 1990-12-10 | Raizaa Kogyo Kk | Photo-oxidation treatment method and apparatus |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06328068A (en) * | 1993-05-20 | 1994-11-29 | Agency Of Ind Science & Technol | Waste water treatment device using photocatalyst |
| US9555374B2 (en) | 2009-04-29 | 2017-01-31 | Basf Se | Method for conditioning catalysts by means of membrane filtration |
| CN105330074A (en) * | 2015-11-30 | 2016-02-17 | 无锡工源机械有限公司 | Air flotation equipment |
| JP2018043231A (en) * | 2016-09-08 | 2018-03-22 | パナソニックＩｐマネジメント株式会社 | Liquid treatment method and liquid treatment device |
| KR20210043122A (en) * | 2019-10-11 | 2021-04-21 | (주)신산 | Non-degradable Waste Water Treatment Apparatus |
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