JPH06182363A - Treatment of waste water by biological treatment using photocatalyst in pretreatment - Google Patents
Treatment of waste water by biological treatment using photocatalyst in pretreatmentInfo
- Publication number
- JPH06182363A JPH06182363A JP4309752A JP30975292A JPH06182363A JP H06182363 A JPH06182363 A JP H06182363A JP 4309752 A JP4309752 A JP 4309752A JP 30975292 A JP30975292 A JP 30975292A JP H06182363 A JPH06182363 A JP H06182363A
- Authority
- JP
- Japan
- Prior art keywords
- cathode
- waste water
- wastewater
- photocatalyst
- anode
- 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
- 239000002351 wastewater Substances 0.000 title claims abstract description 27
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 18
- 238000011282 treatment Methods 0.000 title abstract description 21
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 17
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 16
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 9
- 230000002378 acidificating effect Effects 0.000 claims abstract description 7
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 7
- 230000003647 oxidation Effects 0.000 claims description 11
- 238000007254 oxidation reaction Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000003929 acidic solution Substances 0.000 claims description 10
- -1 titanium oxide compound Chemical class 0.000 claims description 6
- 239000005416 organic matter Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 5
- 230000001590 oxidative effect Effects 0.000 abstract description 5
- 150000002926 oxygen Chemical class 0.000 abstract description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- 239000000126 substance Substances 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 5
- XLJMAIOERFSOGZ-UHFFFAOYSA-N cyanic acid Chemical compound OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical group 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006298 dechlorination reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 229940005654 nitrite ion Drugs 0.000 description 1
- 150000004045 organic chlorine compounds Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、光触媒により排水中の
有機物を部分酸化して、生物処理をし易くした排水処理
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wastewater treatment method for facilitating biological treatment by partially oxidizing organic matter in wastewater with a photocatalyst.
【０００２】[0002]
【従来の技術】近年、各工場や事業場などから出る排水
は、凝集沈澱や活性汚泥などのいろいろな処理をして排
出されるので、河川の環境基準を維持できるようになっ
た。しかしながら、一部の都市河川においては、未だ基
準が達成できないところがあり、深刻な社会問題になっ
ている。そのため、礫間酸化法や活性炭による処理が施
されているが、未だ確立されているとはいい難い。2. Description of the Related Art In recent years, wastewater discharged from factories and business establishments is subjected to various treatments such as coagulation sedimentation and activated sludge, and is discharged, so that environmental standards of rivers can be maintained. However, some urban rivers still do not meet the standards, which is a serious social problem. Therefore, although the inter-gravel oxidation method and the treatment with activated carbon have been performed, it cannot be said that it has been established yet.
【０００３】[0003]
【発明が解決しようとする課題】ところで、河川に入る
排水は、凝集沈澱や活性汚泥などの生物処理が施されて
いるものの、水量そのものが多いために河川の自己浄化
能力を越えてしまって、水質基準を維持できないという
問題がある。また、水中に、河川の浄化能力では対処で
きない物質、すなわち生物難分解性の物質が多量に残存
していることも、水質基準を維持できない一因と考えら
れている。By the way, although the wastewater entering the river is subjected to biological treatment such as coagulation sedimentation and activated sludge, the amount of water itself is so large that it exceeds the self-cleaning ability of the river. There is a problem that water quality standards cannot be maintained. Further, it is considered that a large amount of substances that cannot be dealt with by the purifying ability of rivers, that is, substances that are hardly biodegradable remain in the water, which is one of the reasons that the water quality standard cannot be maintained.
【０００４】本発明は、このような従来技術を背景にな
されたもので、光触媒により排水中の有機物を部分酸化
して、生物処理をし易くした排水処理方法を提供するこ
とを目的とする。The present invention has been made against such a background of the prior art, and an object of the present invention is to provide a wastewater treatment method for facilitating biological treatment by partially oxidizing organic substances in wastewater by a photocatalyst.
【０００５】[0005]
【課題を解決するための手段】本発明は、酸化チタンま
たはチタン酸化化合物を少なくとも表面に有する陰極が
配置された排水受部内に排水を入れ、白金またはニッケ
ルを少なくとも表面に有する陽極が配置された酸性液受
部内に酸性溶液を入れてこれらの排水受部と酸性液受部
とを隔膜により連通して回路を設け、次いで陰極面に日
光または紫外線などの波動エネルギーを有する電磁波を
照射して水の分解により陰極の表面に酸素を発生させ、
この酸素により排水中の有機物を生物処理し易いように
部分酸化することを特徴とする光触媒を前処理に用いた
生物処理による排水処理方法を提供するものである。According to the present invention, drainage is introduced into a drainage receiving portion in which a cathode having titanium oxide or a titanium oxide compound on at least the surface thereof is disposed, and an anode having platinum or nickel on at least the surface is disposed. An acidic solution is put in the acidic solution receiving section to connect these drainage receiving section and acidic solution receiving section with a diaphragm to provide a circuit, and then the cathode surface is irradiated with electromagnetic waves having wave energy such as sunlight or ultraviolet rays to produce water. Oxygen is generated on the surface of the cathode by the decomposition of
The present invention provides a wastewater treatment method by biological treatment using a photocatalyst for pretreatment, which partially oxidizes organic matter in wastewater by this oxygen so as to facilitate biological treatment.
【０００６】[0006]
【作用】本発明の光触媒を前処理に用いた生物処理によ
る排水処理方法は、酸化チタンまたはチタン酸化化合物
を少なくとも表面に有する陰極が配置された陰極槽内に
排水を入れる一方、白金またはニッケルを少なくとも表
面に有する陽極が配置された陽極槽内に酸性溶液を入れ
る。なお、これらの陰極槽および陽極槽は、例えば塩橋
などの隔膜（半透膜）により連通されている。In the wastewater treatment method by biological treatment using the photocatalyst of the present invention, the wastewater is put into a cathode tank in which a cathode having at least a surface of titanium oxide or a titanium oxide compound is placed, while platinum or nickel is added. An acidic solution is put into an anode tank in which an anode having at least a surface is arranged. The cathode tank and the anode tank are connected by a diaphragm (semipermeable membrane) such as a salt bridge.
【０００７】次いで、陰極に日光または紫外線などの波
動エネルギーを有する電磁波を照射すると、陰極では水
が分解され酸素が発生し、陽極では水素が発生する。こ
のようにして得られる酸素は非常に活性化しており、排
水中の有機物を部分酸化することができる。また、酸化
された結果、一般に生物処理がし易くなる。Then, when the cathode is irradiated with an electromagnetic wave having wave energy such as sunlight or ultraviolet rays, water is decomposed in the cathode to generate oxygen, and hydrogen is generated in the anode. Oxygen thus obtained is highly activated and can partially oxidize organic substances in wastewater. Also, as a result of being oxidized, biological treatment is generally easier.
【０００８】[0008]
【実施例】以下、本発明の実施例を図面に基づいて詳細
に説明する。まず、本発明の実施例の光触媒を前処理に
用いた生物処理による排水処理方法に用いられる排水処
理装置の構成を説明する。Embodiments of the present invention will now be described in detail with reference to the drawings. First, the configuration of the wastewater treatment equipment used in the wastewater treatment method by biological treatment using the photocatalyst of the embodiment of the present invention as the pretreatment will be described.
【０００９】図１は、光触媒を前処理に用いた生物処理
による排水処理装置の斜視図である。符号１は大型の受
け皿部であり、受け皿部１の一方の角部には処理後の排
水Ｄを外部に排出させる排出口１ａを設けている。受け
皿部１の上面には容積約０．２５ｍ3 の接触酸化槽２が
載置されており、接触酸化槽２の一辺部上には、酸化チ
タンからなり排水Ｄを部分酸化させる横長の陰極トレイ
３を、支柱４により下方から支持した状態で横設してい
る。この陰極トレイ３は、陰極が配置された排水Ｄを入
れる排水受部を兼務している。また、陰極トレイ３は、
例えばチタン製のトレイ３を１，３５０℃で数分間焼成
してチタン表面に酸化チタンからなる酸化皮膜を設けた
ものなどが使用できる。FIG. 1 is a perspective view of a wastewater treatment apparatus for biological treatment using a photocatalyst for pretreatment. Reference numeral 1 denotes a large saucer portion, and a discharge port 1a for discharging the treated wastewater D to the outside is provided at one corner of the saucer portion 1. A catalytic oxidation tank 2 having a volume of about 0.25 m 3 is placed on the upper surface of the tray portion 1, and a horizontally long cathode tray made of titanium oxide for partially oxidizing the wastewater D is placed on one side of the catalytic oxidation tank 2. 3 is laterally installed while being supported from below by a support column 4. The cathode tray 3 also serves as a drainage receiving portion for containing the drainage D in which the cathode is arranged. Further, the cathode tray 3 is
For example, it is possible to use a tray 3 made of titanium, which is fired at 1,350 ° C. for several minutes to form an oxide film made of titanium oxide on the titanium surface.
【００１０】この陰極トレイ３の接触酸化槽２側は開口
しており、その開口部には排水Ｄの漏斗部５を設けてい
る。陰極トレイ３の中央部の一方側上には、陽極部６を
設けている。以下、この陽極部６を図２を参照して詳細
に説明する。The cathode tray 3 has an opening on the side of the catalytic oxidation tank 2, and a funnel portion 5 for drainage D is provided at the opening. An anode part 6 is provided on one side of the central part of the cathode tray 3. Hereinafter, the anode portion 6 will be described in detail with reference to FIG.
【００１１】図２は、陽極部６の拡大断面図である。陽
極部６は下部が開口された筒体７を有しており、筒体７
の下部内に塩橋部８を設け、排水Ｄと接するようにして
ある。この塩橋部８は、例えば水：寒天：塩化ナトリウ
ムを、１２０：２：４０（重量比）の割合で固化したも
のである。筒体７内には酸性溶液としての硫酸液Ｓが貯
溜されており、塩橋部８により硫酸液Ｓと陰極トレイ３
を電気的に接続している。また、筒体７の上部には水素
ガスを放出するためのパイプ７ａを突設しており、硫酸
液Ｓ中には筒体７の上壁面から吊り下げられた白金から
なる陽極線９の先端部が入れられている。この陽極線９
は途中に抵抗１０を介したリード線１１により陰極トレ
イ３に接続されており、リード線１１と陰極トレイ３の
接続部は、腐食などを防止するためにエポキシ樹脂によ
りコーティングされている。FIG. 2 is an enlarged sectional view of the anode portion 6. The anode part 6 has a cylindrical body 7 whose lower part is opened.
A salt bridge portion 8 is provided in the lower part of the so that it contacts the drainage D. The salt bridge portion 8 is formed by solidifying, for example, water: agar: sodium chloride at a ratio of 120: 2: 40 (weight ratio). The sulfuric acid solution S as an acidic solution is stored in the cylindrical body 7, and the sulfuric acid solution S and the cathode tray 3 are stored by the salt bridge 8.
Are electrically connected. Further, a pipe 7a for releasing hydrogen gas is provided on the upper part of the cylindrical body 7, and in the sulfuric acid solution S, the tip of the anode wire 9 made of platinum suspended from the upper wall surface of the cylindrical body 7. Parts are included. This anode wire 9
Is connected to the cathode tray 3 by a lead wire 11 via a resistor 10 on the way, and a connecting portion between the lead wire 11 and the cathode tray 3 is coated with an epoxy resin to prevent corrosion and the like.
【００１２】次に、この排水処理装置による本発明の実
施例の排水処理方法を説明する。図２に示すように、陰
極トレイ３の先端部上にＢＯＤが１６〜２３ｐｐｍ（実
験では２０ｐｐｍ）の排水Ｄを２５リットル／時間で流
すと、排水Ｄは陰極トレイ３上を流れて漏斗部５から接
触酸化槽２内に落ちる。このとき、図１に示すように、
陰極トレイ３と陽極線９はリード線１１により接続され
ており、しかも陽極部６内の硫酸液Ｓと陰極トレイ３上
を流れる排水Ｄは、塩橋部８および陰極トレイ３を介し
て電気的に接続されている。Next, the wastewater treatment method of the embodiment of the present invention by this wastewater treatment equipment will be explained. As shown in FIG. 2, when the drainage D having a BOD of 16 to 23 ppm (20 ppm in the experiment) is flowed on the tip of the cathode tray 3 at a rate of 25 liters / hour, the drainage D flows on the cathode tray 3 and the funnel portion 5 is discharged. From the contact oxidation tank 2. At this time, as shown in FIG.
The cathode tray 3 and the anode wire 9 are connected by a lead wire 11, and the sulfuric acid solution S in the anode portion 6 and the drainage D flowing on the cathode tray 3 are electrically connected via the salt bridge portion 8 and the cathode tray 3. It is connected to the.
【００１３】次に、排水Ｄが流れている陰極トレイ３上
に日光または紫外線を常時照射すると、陰極トレイ３は
光エネルギーを受けて電子（ｅ- ）を放出し、正孔（ｐ
+ ）が発生する。これを光触媒という。この光触媒によ
り排水Ｄ中の水が分解されて酸素が発生し、陽極線９の
表面からは水素が発生する。この反応を次式に示す。Next, when the cathode tray 3 in which the drainage D is flowing is constantly irradiated with sunlight or ultraviolet rays, the cathode tray 3 receives light energy to emit electrons (e − ) and holes (p − ).
+ ) Occurs. This is called a photocatalyst. The photocatalyst decomposes water in the wastewater D to generate oxygen, and hydrogen is generated from the surface of the anode wire 9. This reaction is shown in the following formula.
【００１４】ＴｉＯ2 ＋ｈν → ｅ- ＋ｐ+ Ｈ2 ０＋２ｐ+ →１／２・Ｏ2 ＋２Ｈ+ （陰極）（Ｔｉ
Ｏ2 電極） ２Ｈ+ ＋２ｅ- → Ｈ2 （陽極）TiO 2 + hν → e − + p + H 2 0 + 2p + → 1/2 · O 2 + 2H + (cathode) (Ti
O 2 electrode) 2H + + 2e - → H 2 ( anode)
【００１５】このようにして発生した酸素は非常に活性
が大きく、排水Ｄ中の有機物および無機物を容易に酸化
することができる。すなわち、アルデヒドはカルボン酸
に、アルコールはカルボン酸と炭酸ガスと水に、シアン
はシアン酸に、シアン酸は炭酸ガスと窒素ガスに、高級
アルコール系洗剤は端末基が切断されて水と二酸化炭素
と硫酸ナトリウムに、亜流酸イオン（ＳＯ2 --）は硫酸
イオン（ＳＯ3 --）に、亜硝酸イオン（ＮＯ- ）は硝酸
イオン（ＮＯ2 - ）にそれぞれ変えられ、そして有機塩
素化合物はカルボニル化されて塩素が取り除かれること
が確認された。The oxygen thus generated has a very high activity and can easily oxidize organic substances and inorganic substances in the wastewater D. That is, aldehyde is carboxylic acid, alcohol is carboxylic acid and carbon dioxide gas and water, cyan is cyanic acid, cyanic acid is carbon dioxide gas and nitrogen gas, and higher alcohol detergents have water and carbon dioxide when the terminal group is cut. the sodium sulfate, sulfite ion, nitrite ion (SO 2 - -) is sulfate ion (SO 3) (NO -) nitrate ion (NO 2 -) changed respectively, and organochlorine compounds It was confirmed to be carbonylated to remove chlorine.
【００１６】このように、排水処理に光触媒を用いるこ
とにより、通常の生物処理では時間がかかる物質を、短
時間のうちに例えばカルボン酸化、低分子化、脱塩素化
などにより部分酸化し、生物処理がし易いものに変える
ことができる。この光触媒による排水処理は、河川敷が
広くて日当たりの良好な河川の浄化に適している。As described above, by using a photocatalyst for wastewater treatment, a substance that normally takes a long time in biological treatment is partially oxidized in a short time by, for example, carboxylic oxidation, depolymerization, dechlorination, and It can be changed to one that is easy to process. The wastewater treatment using this photocatalyst is suitable for the purification of rivers with a wide riverbed and good sunlight.
【００１７】図１に示すように、このようにして光触媒
により部分酸化された排水Ｄは、前述したように接触酸
化槽２内に流入され、この槽内で例えば礫間接触酸化な
どによる一般的な排水Ｄの生物処理を行う。なお、この
礫間接触酸化に代えて、発泡ポリエチレン（ＰＥ）を原
料とするネット（例えば２４〜２７ｍｍの格子状のネッ
ト）とポリエステル編物をサンドイッチしたものを使用
すると、例えば礫間酸化生物量が５〜７ｋｇ／ｍ3 に対
して、ＰＥ／ポリエステル膜生物量は１０〜１５ｋｇ／
ｍ3 になり、排水Ｄの生物処理が良好に行える。このよ
うにして生物処理された排水ＤのＢＯＤは３〜８ｐｐｍ
（実験では４．１ｐｐｍ）であり、環境基準を充分に満
足させるものであった。As shown in FIG. 1, the wastewater D thus partially oxidized by the photocatalyst is flowed into the catalytic oxidation tank 2 as described above, and in this tank, for example, a general oxidation by gravel contact oxidation is performed. Biological treatment of various wastewater D is performed. In addition, instead of this gravel-catalyzed catalytic oxidation, when a net (for example, a grid net of 24 to 27 mm) made of expanded polyethylene (PE) as a material and a polyester knit is used, for example, the inter-gravel oxidative biomass is increased. PE / polyester membrane biomass of 10 to 15 kg / for 5 to 7 kg / m 3 .
It becomes m 3 , and the biological treatment of wastewater D can be performed well. The BOD of wastewater D biologically treated in this way is 3 to 8 ppm.
(4.1 ppm in the experiment), which sufficiently satisfies the environmental standard.
【００１８】以上本発明の実施例を説明したが、本発明
はこの実施例に限定されるものではなく、要旨を逸脱し
ない範囲での設計変更などがあっても本発明に含まれ
る。例えば、実施例では、陰極として陰極トレイを採用
したが、これに限定しなくても、通常の板状または棒状
の陰極でもよい。Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and the invention is included in the present invention even if the design is changed without departing from the scope of the invention. For example, in the embodiment, the cathode tray is adopted as the cathode, but the cathode tray is not limited to this and may be a normal plate-shaped or rod-shaped cathode.
【００１９】また、この陰極の素材として酸化チタンを
採用したが、これに限定なくても、例えば酸化チタン以
外のチタン酸化化合物を使用してもよく、さらに陰極の
表面だけにこのチタン類をコーティングしたものであっ
もよい。なお、近年では、酸化チタンの粉体を触媒にし
たり、有機チタンと白金酸塩との混合溶液をガラスにス
プレーして薄膜の酸化チタンを設け、粒状や白金粒子を
担持させて光触媒とするものなどが知られており、この
ようなものを採用してもよい。Further, although titanium oxide is adopted as the material of the cathode, the present invention is not limited to this, and for example, a titanium oxide compound other than titanium oxide may be used, and the titanium is coated only on the surface of the cathode. It may be one that you have done. In recent years, titanium oxide powder is used as a catalyst, or a mixed solution of organic titanium and a platinate is sprayed on glass to form a thin film of titanium oxide, which is used as a photocatalyst by supporting granular or platinum particles. Etc. are known, and such one may be adopted.
【００２０】さらに、実施例では、陰極トレイを用いる
ことにいより、排水受部と陰極とを兼務させたが、これ
に限定しなくても各々別体のものを使用することもでき
る。Further, in the embodiment, since the cathode tray is used, the drainage receiving portion and the cathode are also used, but the present invention is not limited to this, and separate ones may be used.
【００２１】さらにまた、実施例では、陽極として白金
線を採用したが、これに限定しなくても、例えば板状ま
たは棒状の白金やニッケルを用いたり、母材に白金やニ
ッケルをコーティングしたものを採用することができ
る。Furthermore, in the embodiment, a platinum wire is adopted as the anode. However, without being limited to this, for example, plate-shaped or rod-shaped platinum or nickel is used, or the base material is coated with platinum or nickel. Can be adopted.
【００２２】また、実施例では、酸性溶液として硫酸液
を示したが、これに限定しなくてもどのような酸性溶液
でも採用できる。Although the sulfuric acid solution is shown as the acidic solution in the embodiments, any acidic solution can be adopted without being limited to this.
【００２３】[0023]
【発明の効果】本発明の光触媒を前処理に用いた生物処
理による排水処理方法では、このように酸化チタンまた
はチタン酸化化合物を少なくとも表面に有する陰極が配
置された排水受部内に排水を入れ、白金またはニッケル
を少なくとも表面に有する陽極が配置された酸性液受部
内に酸性溶液を入れてこれらの排水受部と酸性液受部と
を隔膜により連通して回路を設け、次いで陰極に日光ま
たは紫外線などの波動エネルギーを有する電磁波を照射
して陰極の表面に光触媒による酸素を発生させることに
より、この酸素により排水中の有機物を生物処理し易い
ように部分酸化することができるという効果が得られ
る。In the wastewater treatment method by biological treatment using the photocatalyst of the present invention for the pretreatment, the wastewater is put into the wastewater receiving portion in which the cathode having at least the surface of titanium oxide or titanium oxide compound is arranged, An acidic solution is placed in an acidic liquid receiving portion in which an anode having at least platinum or nickel on the surface is placed, and a drainage receiving portion and an acidic liquid receiving portion are connected by a diaphragm to provide a circuit, and then the cathode is exposed to sunlight or ultraviolet rays. By irradiating an electromagnetic wave having wave energy such as that to generate oxygen by the photocatalyst on the surface of the cathode, it is possible to obtain an effect that the organic matter in the wastewater can be partially oxidized by this oxygen so as to facilitate biological treatment.
【図１】本発明の実施例の光触媒を前処理に用いた生物
処理による排水処理方法に使用される排水処理装置の斜
視図である。FIG. 1 is a perspective view of a wastewater treatment apparatus used in a wastewater treatment method by biological treatment using a photocatalyst of an embodiment of the present invention as a pretreatment.
【図２】本発明の実施例に使用される排水処理装置の要
部拡大断面図である。FIG. 2 is an enlarged cross-sectional view of a main part of a wastewater treatment device used in an embodiment of the present invention.
３ 陰極トレイ ８ 塩橋部 ９ 陽極線 Ｄ 排水 Ｓ 硫酸液（酸性溶液） 3 Cathode tray 8 Salt bridge part 9 Anode wire D Waste water S Sulfuric acid solution (acidic solution)
Claims (1)
なくとも表面に有する陰極が配置された排水受部内に排
水を入れ、白金またはニッケルを少なくとも表面に有す
る陽極が配置された酸性液受部内に酸性溶液を入れてこ
れらの排水受部と酸性液受部とを隔膜により連通して回
路を設け、次いで陰極面に日光または紫外線などの波動
エネルギーを有する電磁波を照射して水の分解により陰
極の表面に酸素を発生させ、この酸素により排水中の有
機物を生物処理し易いように部分酸化することを特徴と
する光触媒を前処理に用いた生物処理による排水処理方
法。1. Drainage is introduced into a drainage receiving part in which a cathode having titanium oxide or a titanium oxide compound at least on its surface is disposed, and an acidic solution is introduced into an acidic liquid receiving part in which an anode having at least platinum or nickel on its surface is disposed. A circuit is provided by connecting the drainage receiving part and the acidic liquid receiving part with a diaphragm, and then irradiating the cathode surface with an electromagnetic wave having wave energy such as sunlight or ultraviolet rays to decompose the water and oxygen on the surface of the cathode. And a partial oxidation of the organic matter in the wastewater by the oxygen so that the organic matter in the wastewater can be easily biologically treated. A method for biological wastewater treatment using a photocatalyst as a pretreatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4309752A JPH06182363A (en) | 1992-10-26 | 1992-10-26 | Treatment of waste water by biological treatment using photocatalyst in pretreatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4309752A JPH06182363A (en) | 1992-10-26 | 1992-10-26 | Treatment of waste water by biological treatment using photocatalyst in pretreatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06182363A true JPH06182363A (en) | 1994-07-05 |
Family
ID=17996867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4309752A Pending JPH06182363A (en) | 1992-10-26 | 1992-10-26 | Treatment of waste water by biological treatment using photocatalyst in pretreatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06182363A (en) |
-
1992
- 1992-10-26 JP JP4309752A patent/JPH06182363A/en active Pending
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