JP2516567B2 - Cleaning and regeneration method of catalyst fine particles used in photooxidation method - Google Patents
Cleaning and regeneration method of catalyst fine particles used in photooxidation methodInfo
- Publication number
- JP2516567B2 JP2516567B2 JP5346925A JP34692593A JP2516567B2 JP 2516567 B2 JP2516567 B2 JP 2516567B2 JP 5346925 A JP5346925 A JP 5346925A JP 34692593 A JP34692593 A JP 34692593A JP 2516567 B2 JP2516567 B2 JP 2516567B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- fine particles
- catalyst fine
- tank
- cleaning
- 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
- 239000003054 catalyst Substances 0.000 title claims description 42
- 239000010419 fine particle Substances 0.000 title claims description 36
- 238000000034 method Methods 0.000 title claims description 27
- 238000004140 cleaning Methods 0.000 title claims description 19
- 238000007539 photo-oxidation reaction Methods 0.000 title claims description 13
- 238000011069 regeneration method Methods 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 79
- 238000011282 treatment Methods 0.000 claims description 19
- 239000002253 acid Substances 0.000 claims description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 230000001172 regenerating effect Effects 0.000 claims description 2
- 230000001954 sterilising effect Effects 0.000 claims description 2
- 239000005416 organic matter Substances 0.000 claims 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 19
- 230000002378 acidificating effect Effects 0.000 description 17
- 238000005406 washing Methods 0.000 description 17
- 239000012528 membrane Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 239000004408 titanium dioxide Substances 0.000 description 9
- 238000000108 ultra-filtration Methods 0.000 description 9
- 238000006386 neutralization reaction Methods 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 4
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- -1 hydroxide ions Chemical class 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012320 chlorinating reagent Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 229950011008 tetrachloroethylene Drugs 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Physical Water Treatments (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Catalysts (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、光酸化処理法に使用
した二酸化チタン等の触媒微粒子の洗浄・再生方法に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning and regenerating fine catalyst particles such as titanium dioxide used in a photo-oxidation treatment method.
【０００２】[0002]
【従来の技術】従来、テトロクロロエチレンなどのハロ
ゲン化有機物を含む排水、塩素剤と有機物質との反応に
よって生成される発ガン性物質は、液体の状態で分解し
て無害化する方法がなく、このためこれまで高温で燃焼
させて分解するとか、コンクリート中に詰めて廃棄する
などの方法が採用されていたが、何れの方法も二次公害
の発生の問題がある。2. Description of the Related Art Conventionally, there is no method for decomposing effluents containing halogenated organic substances such as tetrochloroethylene and carcinogenic substances produced by the reaction between chlorinating agents and organic substances in a liquid state. For this reason, methods such as burning at a high temperature to decompose or packing in concrete and discarding have been adopted, but all of these methods have a problem of secondary pollution.
【０００３】これに対して、被処理水中に二酸化チタン
等の触媒微粒子を懸濁させた被処理水中に紫外線を照射
させて行う光酸化処理法は、これら従来の廃水処理技術
では処理できなかったテトラクロロエチレン等のハロゲ
ン化有機物を含む廃水中の有機物を分解できるので、二
次公害を防止する面から注目されている。On the other hand, the photo-oxidation treatment method of irradiating the treated water in which the catalyst fine particles such as titanium dioxide are suspended in the treated water with ultraviolet rays cannot be treated by the conventional wastewater treatment techniques. Since it can decompose organic substances in wastewater containing halogenated organic substances such as tetrachloroethylene, it is attracting attention from the viewpoint of preventing secondary pollution.
【０００４】[0004]
【発明が解決しようとする問題点】しかし、この方法に
おいては使用後の酸化チタン等の触媒微粒子を処理後の
水中から分離、回収が極めて困難であるという問題点が
あり、また使用後の触媒微粒子の再利用の問題点があ
る。However, this method has a problem that it is extremely difficult to separate and recover the catalyst fine particles such as titanium oxide after use from the treated water, and the catalyst after use is also problematic. There is a problem of reuse of fine particles.
【０００５】前者の問題については、本願発明者は先に
二酸化チタンを含む処理水を限外濾過膜を通過させて二
酸化チタン微粒子を処理水を分離して回収する方法を提
案した( 特願平1-118581号）。Regarding the former problem, the inventor of the present application has previously proposed a method of separating treated water containing titanium dioxide by passing it through an ultrafiltration membrane to separate and collect the treated water (Japanese Patent Application No. Hei. 1-118581).
【０００６】しかし、この方法では限外濾過膜で捕集し
た触媒微粒子を処理槽に戻して何度でも使用できるが、
触媒微粒子を被処理水中で繰り返し使用するうちに、触
媒微粒子の表面に有機物或は無機物等が錯体化して固着
し、或は触媒微粒子の表面が着色され、このため徐々に
触媒としての機能が低下することになる。However, in this method, the catalyst fine particles collected by the ultrafiltration membrane can be returned to the treatment tank and used repeatedly.
As the catalyst fine particles are repeatedly used in the water to be treated, organic or inorganic substances are complexed and fixed on the surface of the catalyst fine particles, or the surface of the catalyst fine particles is colored, so that the function as a catalyst gradually decreases. Will do.
【０００７】しかも、これら触媒表面に付着した錯体等
は水洗等では容易に剥離ぜず、また一般のアルカリ剤、
酸性剤等を使用して溶解させる場合には、溶解後の廃液
の処理が不完全の場合には二次公害の問題を引き起こす
ことになる。Further, the complex and the like adhering to the surface of the catalyst are not easily separated by washing with water or the like, and are not easily removed by a general alkali agent,
When dissolving using an acidic agent or the like, if the treatment of the waste liquid after dissolution is incomplete, a problem of secondary pollution will be caused.
【０００８】そこで、二酸化チタン等の触媒微粒子をあ
る程度使用した後は、これを廃棄して新しい触媒に取り
替えることが行われていたが、これは光酸化処理法のコ
ストを引き上げる大きな要因となっており、この点から
後者の問題の完全な解決が要望されている。Therefore, after the catalyst fine particles such as titanium dioxide are used to some extent, they are discarded and replaced with a new catalyst, but this is a major factor in raising the cost of the photo-oxidation treatment method. Therefore, a complete solution to the latter problem is desired from this point.
【０００９】[0009]
【問題点を解決するための手段】以上の問題点を解決す
るため、この発明では被処理水中に触媒微粒子を懸濁さ
せ、紫外線を照射して被処理水の殺菌処理を行った後、
使用した触媒微粒子を食塩水の電気分解によって生成し
たアルカリ水と酸性水を順次供給して上記触媒微粒子を
洗浄する方法を提案するものである。In order to solve the above problems, in the present invention, catalyst fine particles are suspended in water to be treated, and ultraviolet rays are irradiated to sterilize the water to be treated.
It proposes a method for washing the catalyst fine particles by sequentially supplying the used catalyst fine particles with alkaline water and acidic water produced by electrolysis of saline solution.
【００１０】[0010]
【作用】即ち、例えば５％食塩水を陰極と陽極を隔膜で
画して電気分解すると、陰極側には水酸イオン、塩素イ
オン等を含む約pH12のアルカリ水が得られ、陽極側には
水素イオン、ナトリウムイオン等を含む約pH2、ORP(酸化
還元電位)1000mV 以上の酸性水が得られる。In other words, for example, when 5% saline is electrolyzed with the cathode and anode separated by a diaphragm, alkaline water of about pH 12 containing hydroxide ions, chlorine ions, etc. is obtained on the cathode side, and on the anode side. Acidic water containing hydrogen ions, sodium ions, etc. with a pH of about 2 and an ORP (oxidation-reduction potential) of 1000 mV or more can be obtained.
【００１１】このうち、触媒微粒子をアルカリ水で洗浄
すると、触媒微粒子の表面に付着したアルカリ可溶性の
錯体等を溶解除去することができ、また酸性水では洗浄
すると、触媒微粒子の表面に付着する酸可溶性の付着物
を溶解除去することができる。Of these, if the catalyst fine particles are washed with alkaline water, the alkali-soluble complex or the like adhering to the surface of the catalyst fine particles can be dissolved and removed, and if washed with acidic water, the acid adhering to the surface of the catalyst fine particles can be removed. Soluble deposits can be dissolved and removed.
【００１２】なお、この発明で使用する酸性水には対象
物の電子を奪って酸化し、自身は中性化する性質がある
ので、残留性がなく、またアルカリ水は中性化する前の
酸性水と混ぜることにより、中性化するので、何れにし
ても二次公害の問題が発生しない。Since the acidic water used in the present invention has a property of depriving electrons of a target object and oxidizing it to neutralize itself, there is no persistence, and alkaline water is neutralized before neutralization. Since it is neutralized by mixing with acidic water, the problem of secondary pollution does not occur in any case.
【００１３】また、以上のようなアルカリ水、酸性水に
よる触媒微粒子の表面の化学的な洗浄方法に加えて、超
音波振動による物理的な洗浄方法或はオゾン乃至エアー
曝気による化学的物理的な洗浄方法を行ってもよい。In addition to the above-described chemical cleaning method of the surface of the catalyst fine particles with alkaline water or acidic water, a physical cleaning method by ultrasonic vibration or a chemical physical method by ozone or air aeration is used. A cleaning method may be performed.
【００１４】[0014]
【実施例】以下、図示の実施例に基づいてこの発明を詳
細に説明すると、図１はこの発明の洗浄工程を示すもの
で、１は中端部に洗浄水抜きバルブ２、下端部に触媒微
粒子抜きバルブ３を有する洗浄槽であって、洗浄槽１内
には撹拌機４、水位電極５が挿入され、またその底部に
は散気板６を臨ませ、更に洗浄槽１の側壁には超音波振
動器７が取り付けられる。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. FIG. 1 shows a cleaning process of the present invention, wherein 1 is a cleaning water drain valve 2 at a middle end, and a catalyst is a lower end. A washing tank having a particulate removal valve 3, a stirrer 4 and a water level electrode 5 are inserted into the washing tank 1, and a diffuser plate 6 faces the bottom thereof. The ultrasonic vibrator 7 is attached.
【００１５】洗浄槽１の下方には水抜き槽８を位置さ
せ、この水抜き槽８には内部にフィルター篭９が収納さ
れ、更にその側部には洗浄水抜きバルブ10が設けられて
いる。A water draining tank 8 is located below the washing tank 1, and a filter basket 9 is housed in the water draining tank 8 and a washing water draining valve 10 is provided on the side thereof. .
【００１６】光酸化処理工程11から送られた使用済みの
二酸化チタン等の触媒微粒子12を洗浄槽１内に供給され
るが、ここで図２に基づいて光酸化処理工程11を詳細に
説明すると、これに使用する光酸化処理装置は紫外線ラ
ンプ13を内蔵した処理槽14と限外濾過膜15を内蔵した分
離槽16とからなり、被処理水は触媒微粒子12と共に処理
槽14内に供給し、ここでヒータ17により加熱しながら紫
外線照射を受け、これにより二酸化チタン微粒子の触媒
作用により被処理水中の有機物の分解、殺菌処理等が行
われる。The used catalyst fine particles 12 such as titanium dioxide sent from the photooxidation treatment step 11 are supplied into the cleaning tank 1. Here, the photooxidation treatment step 11 will be described in detail with reference to FIG. The photo-oxidation treatment device used for this is composed of a treatment tank 14 having a built-in ultraviolet lamp 13 and a separation tank 16 having an ultrafiltration membrane 15, and the water to be treated is supplied into the treatment tank 14 together with the catalyst fine particles 12. Here, while being heated by the heater 17, it is irradiated with ultraviolet rays, whereby the decomposition of organic substances in the water to be treated, the sterilization treatment and the like are performed by the catalytic action of the titanium dioxide fine particles.
【００１７】処理された水は、圧送ポンプ18により分離
槽16に送り、限外濾過膜15を通過させることにより、触
媒微粒子12は限外濾過膜15で捕集し、処理水と分離し、
限外濾過膜15で捕集された触媒微粒子12は洗浄水をポン
プ19により限外濾過膜15の内側に圧送することにより、
限外濾過膜15より解放し、解放された触媒微粒子12はそ
の一部は処理槽14に戻し、その一部は上述のように洗浄
槽１内に供給される。The treated water is sent to the separation tank 16 by the pressure pump 18 and passed through the ultrafiltration membrane 15, so that the catalyst fine particles 12 are collected by the ultrafiltration membrane 15 and separated from the treated water.
The catalyst fine particles 12 collected by the ultrafiltration membrane 15 are pumped with washing water to the inside of the ultrafiltration membrane 15 by the pump 19,
A part of the released catalyst fine particles 12 released from the ultrafiltration membrane 15 is returned to the treatment tank 14, and a part thereof is supplied into the cleaning tank 1 as described above.
【００１８】また、洗浄槽１にはアルカリ水と酸性水の
供給工程20よりアルカリ水と酸性水が順次供給される
が、ここで図３に基づいて供給工程20を詳細に説明する
と、供給工程20はその内部に隔膜21a を介して陰極室21
b と陽極室21c を有する電気分解装置21と食塩タンク22
と酸性水の貯水タンク23からなり、水道水に食塩タンク
22から食塩を補給して５％濃度の食塩水とした電解用水
を電気分解装置21により電気分解し、陰極室21b にOH-,
Cl-,SO4 2- 等の陰イオンを含むアルカリ水( 約pH11.8)
を生成し、一方陽極室21c にはH+,Na+,K+,Mg2+,Ca2+ 等
を含む酸性水( 約pH2.2)を生成する。Further, the alkaline water and the acidic water are sequentially supplied to the cleaning tank 1 from the supplying step 20 of the alkaline water and the acidic water. Here, the supplying step 20 will be described in detail with reference to FIG. 20 is inside the cathode chamber 21 via a diaphragm 21a.
Electrolyzer 21 and salt tank 22 having b and anode chamber 21c
And acid water storage tank 23, tap water salt tank
Electrolyzing electrolytic water for which the saline concentration of 5% by replenishing the salt from 22 by the electrolysis device 21, OH in the cathode chamber 21b -,
Cl -, alkaline water containing an anion SO 4 2-like (about pH 11.8)
On the other hand, acidic water (about pH 2.2) containing H + , Na + , K + , Mg 2+ , Ca 2+, etc. is generated in the anode chamber 21c.
【００１９】このうち、アルカリ水は直ちに洗浄槽１に
供給し、アルカリ水の供給は水位電極５により洗浄槽１
が所定の水位に達した時に停止し、一方酸性水は一旦貯
水タンク23に貯水する。Of these, the alkaline water is immediately supplied to the cleaning tank 1, and the alkaline water is supplied by the water level electrode 5 to the cleaning tank 1.
Stops when the water level reaches a predetermined level, while the acidic water is temporarily stored in the water storage tank 23.
【００２０】使用済みの触媒微粒子12とアルカリ水の収
容された洗浄槽１では撹拌機４で内部を撹拌し、更に超
音波振動器７で振動させながら、洗浄を行う。In the cleaning tank 1 containing the used catalyst fine particles 12 and the alkaline water, the inside is stirred by the stirrer 4 and further cleaned by vibrating by the ultrasonic vibrator 7.
【００２１】アルカリ水による洗浄後、洗浄水抜きバル
ブ２を開き、アルカリ水を排水し、このアルカリ水は中
和タンク24に貯水する。After washing with the alkaline water, the washing water drain valve 2 is opened to drain the alkaline water, and the alkaline water is stored in the neutralization tank 24.
【００２２】次に、電気分解装置21の電源をオフにして
電気分解を停止すると共に、貯水タンク23に貯水された
酸性水を洗浄槽１内に供給してアルカリ水と同様に酸性
水によって触媒微粒子12の洗浄を行う。Next, the power of the electrolyzer 21 is turned off to stop the electrolysis, and the acidic water stored in the water storage tank 23 is supplied into the cleaning tank 1 to be catalyzed by the acidic water like alkaline water. The fine particles 12 are washed.
【００２３】洗浄後の酸性水は中和タンク24に貯水し、
先のアルカリ水を中和することにより、排水口より中和
により無害化された洗浄水を排水できる。The acidic water after washing is stored in the neutralization tank 24,
By neutralizing the alkaline water, the washing water detoxified by neutralization can be drained from the drain port.
【００２４】酸性水の排水後、洗浄槽１内に純水又は水
道水を供給し、アルカリ水と酸性水により洗浄された触
媒微粒子12の表面を洗浄する。After draining the acidic water, pure water or tap water is supplied into the washing tank 1 to wash the surfaces of the catalyst fine particles 12 washed with the alkaline water and the acidic water.
【００２５】なお、上述の純水又は水道水による洗浄中
に、散気板６よりオゾン乃至エアーを供給して触媒微粒
子12の表面を曝気処理しても良く、これらの曝気処理は
純水又は水道水による洗浄とは別に行っても良い。During cleaning with pure water or tap water, ozone or air may be supplied from the diffuser plate 6 to aerate the surface of the catalyst fine particles 12, and these aeration treatments may be performed with pure water or air. It may be performed separately from the cleaning with tap water.
【００２６】全ての洗浄の終了後、バルブ３を開き、洗
浄された触媒微粒子12を洗浄水と共に水抜き槽８に移
し、水抜き槽８では洗浄された触媒微粒子12はフィルタ
ー篭９に収納され、一方洗浄水はバルブ10を開くことに
より、排出され、洗浄された触媒微粒子12を処理槽14に
戻して再利用することができる。After completion of all the washing, the valve 3 is opened, the washed catalyst fine particles 12 are transferred to the water draining tank 8 together with the washing water, and the washed catalyst fine particles 12 are stored in the filter basket 9 in the water draining tank 8. On the other hand, the cleaning water is discharged by opening the valve 10, and the cleaned catalyst fine particles 12 can be returned to the processing tank 14 for reuse.
【００２７】[0027]
【発明の効果】以上要するに、この発明によれば光酸化
処理工程で使用した二酸化チタン等の触媒微粒子の表面
に付着した錯体等の付着物を二次公害を発生することな
く、溶解除去することができる。In summary, according to the present invention, the deposits such as the complex adhering to the surface of the catalyst fine particles such as titanium dioxide used in the photo-oxidation treatment step can be dissolved and removed without causing the secondary pollution. You can
【００２８】また、この発明によれば二酸化チタン等の
高価な触媒粒子を繰り返して再利用できるため、光酸化
処理法のコスト低減に大きく貢献することができる。Further, according to the present invention, since expensive catalyst particles such as titanium dioxide can be repeatedly reused, it can greatly contribute to the cost reduction of the photooxidation treatment method.
【図１】 この発明に係る光酸化処理工程で使用された
触媒微粒子の洗浄工程を示す図FIG. 1 is a diagram showing a cleaning process of catalyst fine particles used in the photo-oxidation treatment process according to the present invention.
【図２】 光酸化処理工程を示す図FIG. 2 is a diagram showing a photooxidation treatment process.
【図３】 アルカリ水と酸性水の供給工程とその排水工
程を示す図FIG. 3 is a diagram showing a process of supplying alkaline water and acidic water and a process of draining the same.
１は洗浄槽 ２は洗浄水抜きバルブ ３は触媒微粒子抜きバルブ ４は撹拌機 ５は水位電極 ６は散気板 ７は超音波振動器 ８は水抜き槽 ９はフィルター篭 10は洗浄水抜きバルブ 11は光酸化処理工程 12は二酸化チタン等の触媒微粒子 13は紫外線ランプ 14は処理槽 15は限外濾過膜 16は分離槽 17はヒータ 18は圧送ポンプ 19はポンプ 20はアルカリ水と酸性水の供給工程 21は電気分解装置 21a は隔膜 21baは陰極室 21cbは陽極室 22は食塩タンク 23は酸性水の貯水タンク 24は中和タンク 1 is a washing tank 2 is a washing water draining valve 3 is a catalyst particulate draining valve 4 is a stirrer 5 is a water level electrode 6 is a diffuser plate 7 is an ultrasonic vibrator 8 is a water draining tank 9 is a filter basket 10 is a washing water draining valve 11 is a photo-oxidation process step 12 is catalyst fine particles such as titanium dioxide 13 is an ultraviolet lamp 14 is a treatment tank 15 is an ultrafiltration membrane 16 is a separation tank 17 is a heater 18 is a pressure pump 19 is a pump 20 is alkaline water and acid water Supply process 21 is electrolyzer 21a is diaphragm 21ba is cathode chamber 21cb is anode chamber 22 is salt tank 23 is acid water storage tank 24 is neutralization tank
Claims (1)
外線を照射して被処理水の有機物分解乃至殺菌処理を行
った後、使用した触媒微粒子を食塩水の電気分解によっ
て生成したアルカリ水と酸性水を順次供給して上記触媒
微粒子を洗浄することを特徴とする光酸化処理法に使用
する触媒微粒子の洗浄・再生方法。1. Alkaline water produced by suspending catalyst fine particles in water to be treated, irradiating ultraviolet rays to decompose organic matter in the water to be treated or sterilizing the catalyst, and then using the catalyst fine particles used to electrolyze saline And a method of cleaning and regenerating the catalyst fine particles used in the photo-oxidation treatment method, characterized in that the catalyst fine particles are washed by sequentially supplying acid water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5346925A JP2516567B2 (en) | 1993-12-27 | 1993-12-27 | Cleaning and regeneration method of catalyst fine particles used in photooxidation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5346925A JP2516567B2 (en) | 1993-12-27 | 1993-12-27 | Cleaning and regeneration method of catalyst fine particles used in photooxidation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07185339A JPH07185339A (en) | 1995-07-25 |
| JP2516567B2 true JP2516567B2 (en) | 1996-07-24 |
Family
ID=18386747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5346925A Expired - Fee Related JP2516567B2 (en) | 1993-12-27 | 1993-12-27 | Cleaning and regeneration method of catalyst fine particles used in photooxidation method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2516567B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5217561B2 (en) * | 2008-03-28 | 2013-06-19 | 宇部興産株式会社 | Photocatalyst regeneration method |
| CN106944160A (en) * | 2017-04-28 | 2017-07-14 | 杨林 | A kind of reactivation with aeration method of powder photocatalyst |
-
1993
- 1993-12-27 JP JP5346925A patent/JP2516567B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07185339A (en) | 1995-07-25 |
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