JPH05237484A - Catalytic oxidative treatment of waste water - Google Patents
Catalytic oxidative treatment of waste waterInfo
- Publication number
- JPH05237484A JPH05237484A JP3785192A JP3785192A JPH05237484A JP H05237484 A JPH05237484 A JP H05237484A JP 3785192 A JP3785192 A JP 3785192A JP 3785192 A JP3785192 A JP 3785192A JP H05237484 A JPH05237484 A JP H05237484A
- Authority
- JP
- Japan
- Prior art keywords
- waste water
- cod
- wastewater
- nickel
- compd
- 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 44
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 14
- 230000001590 oxidative effect Effects 0.000 title abstract description 7
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 26
- 230000003647 oxidation Effects 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 16
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000460 chlorine Substances 0.000 claims abstract description 9
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000007800 oxidant agent Substances 0.000 claims abstract description 8
- 150000002816 nickel compounds Chemical class 0.000 claims description 13
- JFBJUMZWZDHTIF-UHFFFAOYSA-N chlorine chlorite Inorganic materials ClOCl=O JFBJUMZWZDHTIF-UHFFFAOYSA-N 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 32
- 229910052759 nickel Inorganic materials 0.000 abstract description 15
- 229910052801 chlorine Inorganic materials 0.000 abstract description 7
- 239000010802 sludge Substances 0.000 abstract description 7
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 239000002244 precipitate Substances 0.000 description 5
- 238000004065 wastewater treatment Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000005708 Sodium hypochlorite Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 150000002736 metal compounds Chemical class 0.000 description 3
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 1
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Catalysts (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は金属表面処理工程などか
ら発生するＢＯＤやＣＯＤを含有する排水を接触酸化処
理するための工業的な方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an industrial method for catalytically oxidizing wastewater containing BOD and COD generated in a metal surface treatment process.
【０００２】[0002]
【従来の技術】ＢＯＤやＣＯＤを含有する排水は、環境
を汚染しないように処理して排出することが普通である
が、金属表面処理工程などから発生する排水には重金属
イオンなどが含まれることがあるほか、油脂類やアルコ
ール系の溶剤類、更には界面活性剤などが含まれること
が多く、これらに由来する高濃度のＢＯＤやＣＯＤを処
理するに塩素や活性酸素等を用いて化学的に酸化する方
法がしばしば利用されている。2. Description of the Related Art Wastewater containing BOD or COD is usually treated and discharged so as not to pollute the environment. However, wastewater generated from the metal surface treatment process contains heavy metal ions and the like. In addition, oils and alcohols and solvents such as surfactants are often contained, and chlorine and active oxygen are used to treat high concentrations of BOD and COD derived from them. The method of oxidizing to is often used.
【０００３】かかる酸化による排水処理に際しては、例
えば少量の金属化合物例えば鉄塩や銅塩などを触媒とし
て添加したうえ酸素やオゾン等を排水中に吹き込み、所
定時間反応させる方法（特開昭４６−６２７８号）があ
り、また酸化剤による排水処理の後に必要に応じて活性
炭を加えて酸化と吸着とを行わせ、その後固形物を凝集
分離して清澄な処理水を得る、例えば図２に示すような
フローシートに示す方法もある。又かかる排水処理方法
の改良として、亜鉛、コバルト、ニッケル等の金属化合
物の存在下にpH４〜８において有効塩素を作用させる方
法も提案されている（特公昭５５−１０３１５号）。In such wastewater treatment by oxidation, for example, a method of adding a small amount of a metal compound such as iron salt or copper salt as a catalyst and blowing oxygen or ozone into the wastewater to react for a predetermined time (Japanese Patent Laid-Open No. 46-46). No. 6278), and after the wastewater treatment with an oxidizing agent, activated carbon is added as necessary to perform oxidation and adsorption, and then solid matter is coagulated and separated to obtain clear treated water, for example, as shown in FIG. There is also a method shown in such a flow sheet. Further, as an improvement of such a wastewater treatment method, a method has been proposed in which effective chlorine is allowed to act at pH 4 to 8 in the presence of a metal compound such as zinc, cobalt and nickel (Japanese Patent Publication No. 55-10315).
【０００４】[0004]
【発明が解決しようとする課題】しかしながらかかる従
来の排水処理方法においては、処理水は清浄化されても
同時に発生する重金属を含む汚泥は環境汚染の恐れがあ
るためにそのまま廃棄することができず、またかかる汚
泥の処理は容易でない。従ってまた酸化触媒として投入
される金属化合物等の薬品の費用が嵩むという不利があ
るほか、少量の汚泥を無害化するのに大きな経済的負担
がかかるという問題もあった。そこで本発明は、処理薬
品の費用を軽減するとともに、発生する重金属含有汚泥
の処理費用をも節減できる、経済的な排水処理方法を提
供しようとするものである。However, in such a conventional wastewater treatment method, even if the treated water is purified, sludge containing heavy metals generated at the same time cannot be discarded as it is because it may cause environmental pollution. Also, the treatment of such sludge is not easy. Therefore, in addition to the disadvantage that the cost of chemicals such as metal compounds added as an oxidation catalyst increases, there is also the problem that a large amount of economic burden is required to render a small amount of sludge harmless. Therefore, the present invention is intended to provide an economical wastewater treatment method that can reduce the cost of a treatment chemical and also reduce the treatment cost of generated heavy metal-containing sludge.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
めに本発明の排水の接触酸化処理方法においては、排水
に酸化剤とニッケル化合物とを添加して排水中のＣＯＤ
を低減させるに際し、該ニッケル化合物として処理済排
水から分離された回収ニッケル化合物の酸化処理物を使
用するようにしたものである。In order to achieve the above object, in the method for catalytic oxidation treatment of wastewater according to the present invention, COD in the wastewater is obtained by adding an oxidant and a nickel compound to the wastewater.
When reducing the above, the oxidation treatment product of the recovered nickel compound separated from the treated wastewater is used as the nickel compound.
【０００６】本発明の排水の接触酸化処理方法は、図１
に示すフローシートのように実施されるが、ＣＯＤを含
む排水を接触酸化するために加えられるニッケル化合物
は、処理済排水を凝集沈殿させて分離して得たスラリー
をそのまま回収し、塩素又は次亜塩素酸塩と接触させて
酸化処理することによって調製することができる。こう
して得た酸化処理物はスラリー状であって、ニッケルは
酸化物又は過酸化物の形態で含まれているものと考えら
れる。The method of catalytically treating waste water according to the present invention is shown in FIG.
The nickel compound added to catalytically oxidize the wastewater containing COD is used as the flow sheet shown in Fig. 1, but the slurry obtained by coagulating sedimentation of the treated wastewater and separating it is recovered as it is, and then chlorine or It can be prepared by contacting with chlorite and subjecting to oxidation treatment. It is considered that the oxidation-treated product thus obtained is in the form of slurry and nickel is contained in the form of oxide or peroxide.
【０００７】本発明の排水の接触酸化処理方法によって
ＢＯＤやＣＯＤを含む排水を処理するに当たっては、ニ
ッケル化合物を含む酸化処理物のスラリーを排水に混合
して接触酸化反応をさせるが、前記のスラリー中には次
亜塩素酸塩などが残留していても構わない。また、排水
と前記の酸化処理物との反応中に塩素又は次亜塩素酸塩
などを追加して、反応を更に進めるようにしてもよい。
このような反応を進めるに際して、排水のpHは５〜１２
の範囲内に調整することが望ましい。In treating the wastewater containing BOD and COD by the method of catalytic oxidation treatment of wastewater of the present invention, a slurry of an oxidation treated product containing a nickel compound is mixed with the wastewater to cause a catalytic oxidation reaction. Hypochlorite may remain inside. In addition, chlorine or hypochlorite may be added during the reaction between the wastewater and the above-mentioned oxidized product to further advance the reaction.
When carrying out such a reaction, the pH of the waste water is 5 to 12
It is desirable to adjust within the range.
【０００８】このような接触酸化反応処理を所定時間実
施したのち、必要に応じてニッケル塩などを追加し、pH
を９〜１２の範囲内に調整して更に反応を進めるように
してもよい。こうして排水中のＣＯＤが所定の範囲まで
低下したのち、高分子凝集剤などを添加し、ニッケルの
酸化物や水酸化物などをその他の不溶解物と共に沈殿さ
せてスラリーとして抜き出し、再び酸化処理工程に送っ
て酸化処理物として再使用する。この際、沈殿物の量が
多すぎるときはその一部を抜き出して脱水機に送り、脱
水重金属スラッジとして資源回収工程に送ってもよい。After carrying out such a catalytic oxidation reaction treatment for a predetermined time, a nickel salt or the like is added if necessary, and the pH is adjusted.
May be adjusted within the range of 9 to 12 to further advance the reaction. After the COD in the waste water has fallen to a predetermined range in this way, a polymer flocculant or the like is added, nickel oxide or hydroxide is precipitated together with other insoluble substances and extracted as a slurry, and the oxidation treatment step is performed again. To be reused as an oxidized product. At this time, when the amount of the precipitate is too large, a part thereof may be extracted and sent to the dehydrator, and sent to the resource recovery step as dehydrated heavy metal sludge.
【０００９】上記のような接触酸化反応処理は、排水中
に回収ニッケル化合物の酸化処理物又は酸化剤を連続的
に添加することにより連続的に実施してもよい。このよ
うな接触酸化反応を終了して沈殿物を分離した清澄な処
理排水は、濾過機及び必要に応じて活性炭やイオン交換
樹脂などを使用した吸着装置を通して更に汚染性物質を
除去し、無害化したのち排出される。The catalytic oxidation reaction treatment as described above may be continuously carried out by continuously adding the oxidation treated product of the recovered nickel compound or the oxidizing agent to the waste water. The clarified treated wastewater from which such a catalytic oxidation reaction has been completed and the precipitate has been separated is further decontaminated by further removing contaminants through a filter and an adsorption device that uses activated carbon, ion exchange resin, etc., as necessary. It will be discharged later.
【００１０】[0010]
【作用】本発明の排水の接触酸化処理方法によれば、排
水の接触酸化に使用したのち回収されたニッケル化合物
を酸化処理して再利用するもので、従来用いられていた
通常のニッケル化合物よりも触媒活性が大きく、短時間
でＣＯＤを高度に酸化処理できるものである。According to the method of catalytic oxidation treatment of waste water of the present invention, the nickel compound recovered after being used for catalytic oxidation of waste water is oxidized and reused. Also has a large catalytic activity and can highly oxidize COD in a short time.
【００１１】[0011]
（比較例１）金属メッキを行う際の前工程である電解脱
脂、水洗、酸洗などの工程から排出されたＣＯＤ含有排
水（ＣＯＤ濃度：１９０mg/l）１０００容量部に対し
て、有効塩素として５０ｇ/lの次亜塩素酸ナトリウム水
溶液５６容量部とニッケルとして１０ｇ/lの硫酸ニッケ
ル水溶液２０容量部とを混合した液を加え、pHを１０．
０として常温で１時間反応させたのち処理水を濾過して
沈降物を回収した。濾過処理水のＣＯＤ濃度を測定した
ところ、２２mg/lとなっていた。なお、処理開始時の排
水中の有効塩素濃度は２８００mg/lであり、ニッケル濃
度は２００mg/lであった。(Comparative Example 1) As 1000 chlorine parts of COD-containing wastewater (COD concentration: 190 mg / l) discharged from the steps such as electrolytic degreasing, washing with water, pickling, which are the previous steps when performing metal plating, A solution prepared by mixing 56 parts by volume of a 50 g / l sodium hypochlorite aqueous solution and 20 parts by volume of a 10 g / l nickel sulfate aqueous solution as nickel was added to adjust the pH to 10.
After reacting at 0 for 1 hour at room temperature, the treated water was filtered to collect the precipitate. When the COD concentration of the filtered water was measured, it was 22 mg / l. The effective chlorine concentration in the waste water at the start of the treatment was 2800 mg / l, and the nickel concentration was 200 mg / l.
【００１２】（実施例）比較例１で回収した沈降物を前
記の次亜塩素酸ナトリウム水溶液５０容量部に混合して
３０分間反応させて酸化処理物とした後、この液状混合
物を前記のＣＯＤ含有排水１０００容量部に加えた。pH
を１０．０として常温で１時間反応させたのち処理水を
濾過してＣＯＤ濃度を測定したところ、２０．５mg/lで
あった。また更に１時間毎に処理水を採取して沈殿物を
濾過し、濾過液のＣＯＤ濃度を測定してＣＯＤの経時変
化を調べ、その結果を表１に示した。なお、処理開始時
の排水中の有効塩素濃度は２７００mg/lであった。(Example) The precipitate recovered in Comparative Example 1 was mixed with 50 parts by volume of the above-mentioned aqueous solution of sodium hypochlorite and reacted for 30 minutes to give an oxidation-treated product. It was added to 1000 parts by volume of the contained wastewater. pH
After the reaction was performed at room temperature for 1 hour, the treated water was filtered to measure the COD concentration, which was 20.5 mg / l. Further, treated water was collected every hour, the precipitate was filtered, and the COD concentration of the filtrate was measured to examine the change with time in COD. The results are shown in Table 1. The effective chlorine concentration in the wastewater at the start of the treatment was 2700 mg / l.
【００１３】（比較例２）比較例１で用いたと同じＣＯ
Ｄ含有排水（ＣＯＤ濃度：１９０mg/l）１０００容量部
に対して、有効塩素として２８００mg/lとなるように次
亜塩素酸ナトリウム水溶液を加え、また鉄として２００
mg/lとなるように塩化鉄(III) を加えて、pHを９．０と
して常温で１時間反応させた。処理水を濾過してＣＯＤ
濃度を測定したところ、３４mg/lとなっていた。Comparative Example 2 The same CO as used in Comparative Example 1
To 1000 parts by volume of D-containing wastewater (COD concentration: 190 mg / l), an aqueous solution of sodium hypochlorite was added so that the available chlorine became 2800 mg / l, and as iron, 200
Iron (III) chloride was added so as to be mg / l, the pH was adjusted to 9.0, and the reaction was carried out at room temperature for 1 hour. Filter the treated water to COD
When the concentration was measured, it was 34 mg / l.
【００１４】（比較例３）比較例２における塩化鉄(II
I) の代わりに、銅として２００mg/lとなるように硫酸
銅を加えたほかは比較例１と全く同様にして常温で１時
間反応させ、処理水を濾過してＣＯＤ濃度を測定したと
ころ、３１mg/lとなっていた。(Comparative Example 3) Iron chloride (II) in Comparative Example 2
Instead of I), copper sulfate was added so that the amount of copper was 200 mg / l, the reaction was carried out at room temperature for 1 hour in the same manner as in Comparative Example 1, and the treated water was filtered to measure the COD concentration. It was 31 mg / l.
【００１５】[0015]
【表１】 表 １ 処理液のＣＯＤ濃度（mg/l） ────────────────────────────────── 反応時間 ０ １ ２ ３ ４ ────────────────────────────────── 比較例１(Ni) 190 22 実施例 (Ni) 190 20.5 16.4 13.1 9.8 比較例２(Fe) 190 34 比較例３(Cu) 190 31 ──────────────────────────────────[Table 1] Table 1 COD concentration of treatment liquid (mg / l) ─────────────────────────────────── Reaction time 0 1 2 3 4 ────────────────────────────────── Comparative Example 1 (Ni) 190 22 Implementation Example (Ni) 190 20.5 16.4 13.1 9.8 Comparative example 2 (Fe) 190 34 Comparative example 3 (Cu) 190 31 ────────────────────────── ─────────
【００１６】[0016]
【発明の効果】本発明の排水の接触酸化処理方法によれ
ば、酸化触媒として用いられるニッケル化合物を回収し
て再利用するので高価なニッケル資源の消費を少なくで
きるばかりでなく、触媒活性が高く使用量も少なくてす
むので更に経済的であるという利点があり、スラッジの
発生も少なくなって処理設備並びに処理費用の節減がで
きるという効果がある。EFFECTS OF THE INVENTION According to the method for catalytically treating waste water of the present invention, since the nickel compound used as the oxidation catalyst is recovered and reused, not only the consumption of expensive nickel resources can be reduced, but also the catalytic activity is high. There is an advantage that it is economical because it can be used in a small amount, and there is an effect that sludge generation is reduced and treatment equipment and treatment cost can be reduced.
【図１】本発明の排水の接触酸化処理方法の例を示すフ
ローシートである。FIG. 1 is a flow sheet showing an example of a method for catalytically treating waste water according to the present invention.
【図２】従来の排水の接触酸化処理方法の例を示すフロ
ーシートである。FIG. 2 is a flow sheet showing an example of a conventional method for catalytically treating waste water.
Claims (3)
して排水中のＣＯＤを低減させるに際し、該ニッケル化
合物として処理済排水から分離された回収ニッケル化合
物の酸化処理物を使用することを特徴とする排水の接触
酸化処理方法。1. When an oxidizing agent and a nickel compound are added to the wastewater to reduce COD in the wastewater, an oxidized treated nickel compound separated from the treated wastewater is used as the nickel compound. Method for contact oxidation treatment of wastewater.
ケル化合物を酸化処理する請求項１記載の排水の接触酸
化処理方法。2. The method for catalytic oxidation treatment of wastewater according to claim 1, wherein the recovered nickel compound is oxidized using chlorine or hypochlorite.
剤との少なくとも一方を排水中に連続的に供給する請求
項１または２記載の排水の接触酸化処理方法。3. The method for catalytic oxidation treatment of waste water according to claim 1, wherein at least one of the oxidation treatment product of the recovered nickel compound and the oxidizing agent is continuously supplied into the waste water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3785192A JPH05237484A (en) | 1992-02-25 | 1992-02-25 | Catalytic oxidative treatment of waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3785192A JPH05237484A (en) | 1992-02-25 | 1992-02-25 | Catalytic oxidative treatment of waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05237484A true JPH05237484A (en) | 1993-09-17 |
Family
ID=12509044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3785192A Pending JPH05237484A (en) | 1992-02-25 | 1992-02-25 | Catalytic oxidative treatment of waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05237484A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52105651A (en) * | 1976-03-02 | 1977-09-05 | Showa Denko Kk | Process for treating drain water |
-
1992
- 1992-02-25 JP JP3785192A patent/JPH05237484A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52105651A (en) * | 1976-03-02 | 1977-09-05 | Showa Denko Kk | Process for treating drain water |
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