JP2000167560A - Treatment apparatus of phosphate ion-containing water - Google Patents
Treatment apparatus of phosphate ion-containing waterInfo
- Publication number
- JP2000167560A JP2000167560A JP10345699A JP34569998A JP2000167560A JP 2000167560 A JP2000167560 A JP 2000167560A JP 10345699 A JP10345699 A JP 10345699A JP 34569998 A JP34569998 A JP 34569998A JP 2000167560 A JP2000167560 A JP 2000167560A
- Authority
- JP
- Japan
- Prior art keywords
- water
- tank
- electrode
- insoluble
- electrolytic
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 50
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 title claims abstract description 21
- 229940085991 phosphate ion Drugs 0.000 title claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- 238000005273 aeration Methods 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 12
- 229910052697 platinum Inorganic materials 0.000 claims description 6
- 229910000859 α-Fe Inorganic materials 0.000 claims description 5
- 229910000510 noble metal Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract description 10
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract description 5
- -1 phosphorus compound Chemical class 0.000 description 24
- 239000002351 wastewater Substances 0.000 description 18
- 238000001914 filtration Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 8
- 238000002161 passivation Methods 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 5
- 238000010828 elution Methods 0.000 description 5
- 229910000398 iron phosphate Inorganic materials 0.000 description 5
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 5
- 229910017604 nitric acid Inorganic materials 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 241000251468 Actinopterygii Species 0.000 description 3
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000004042 decolorization Methods 0.000 description 2
- 239000010840 domestic wastewater Substances 0.000 description 2
- 210000003608 fece Anatomy 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000010871 livestock manure Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229940005654 nitrite ion Drugs 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 102100022210 COX assembly mitochondrial protein 2 homolog Human genes 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 101000900446 Homo sapiens COX assembly mitochondrial protein 2 homolog Proteins 0.000 description 1
- 101000650817 Homo sapiens Semaphorin-4D Proteins 0.000 description 1
- 229910000575 Ir alloy Inorganic materials 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910001260 Pt alloy Inorganic materials 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 102100027744 Semaphorin-4D Human genes 0.000 description 1
- 241000270666 Testudines Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003657 drainage water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000003018 phosphorus compounds Chemical class 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000014102 seafood Nutrition 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Removal Of Specific Substances (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、家庭排水または集
合住宅の排水などのリン酸イオンを含む生活排水や熱帯
魚の水槽などで循環する水の処理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating domestic wastewater containing phosphate ions, such as domestic wastewater or wastewater from an apartment house, and water circulated in a tank for tropical fish.
【０００２】[0002]
【従来の技術】従来より、川や湖の富栄養化の原因の１
つにリン化合物の存在があることは周知である。また、
このリン化合物は一般家庭の生活排水中に多く存在する
が、浄化処理が困難なものであり、有効な対策がとれな
いのが現状である。2. Description of the Related Art Conventionally, one of the causes of eutrophication of rivers and lakes.
It is well known that there is a phosphorus compound. Also,
This phosphorus compound is abundant in domestic household wastewater, but it is difficult to purify it, and no effective measures can be taken at present.
【０００３】リン化合物の処理装置は種々提案されてい
るが、家庭排水については鉄の電解溶出法が知られてい
る（特開平３−８９９９８号公報、特開平１０−１２８
３７０号公報参照、Ｃ０２Ｆ ３／１２）。この技術
は、排水中のリン酸リオンを鉄イオンと反応させ水不溶
性の塩、たとえばＦｅＰＯ4やＦｅ（ＯＨ）x（ＰＯ4）y
として凝集沈殿させて除去しようとする技術であり、電
解槽中に設置された鉄製の電極に通電して排水中に鉄イ
オンを溶出させるものである。そして、かかる電解溶出
法を用いた処理装置は、たとえば嫌気槽、好気槽および
処理水槽からなり、該処理水槽の汚水を、リン酸反応す
る鉄イオンを溶出する電解装置を介して、嫌気槽に循環
するように構成された汚水処理装置などに用いられてい
る。Various treatment apparatuses for phosphorus compounds have been proposed. For household wastewater, an electrolytic elution method of iron is known (Japanese Patent Application Laid-Open Nos. 3-89998 and 10-128).
No. 370, C02F 3/12). This technology reacts lyric phosphate in wastewater with iron ions to form water-insoluble salts such as FePO 4 and Fe (OH) x (PO 4 ) y.
In this technique, iron ions are eluted into wastewater by supplying electricity to an iron electrode installed in an electrolytic cell. A processing apparatus using such an electrolytic elution method includes, for example, an anaerobic tank, an aerobic tank, and a treatment water tank. The wastewater in the treatment water tank is converted into an anaerobic tank through an electrolysis apparatus that elutes iron ions that react with phosphoric acid. It is used in sewage treatment equipment configured to circulate through water.
【０００４】[0004]
【発明が解決しようとする課題】前記電解溶出法による
リン除去の装置では、排水などの被処理水中のリン酸イ
オン濃度、亜硝酸イオン濃度は、電極表面に発生する鉄
イオンの溶出を阻害する不動態膜の発生速度に大きく影
響する。このため、これらのイオンを除去する必要があ
る。しかしながら、リン酸イオンは鉄をリン酸イオン濃
度の一定倍率溶かすことで除去できるが、亜硝酸イオン
は従来の処理装置で除去することが困難であった。In the apparatus for removing phosphorus by the electrolytic elution method, the concentration of phosphate ions and the concentration of nitrite ions in the water to be treated such as wastewater inhibit the elution of iron ions generated on the electrode surface. It greatly affects the generation rate of the passivation film. Therefore, it is necessary to remove these ions. However, phosphate ions can be removed by dissolving iron at a fixed ratio of phosphate ion concentration, but nitrite ions have been difficult to remove with a conventional processing apparatus.
【０００５】本発明は、叙上の事情に鑑み、不動態膜の
発生を抑制し、リン酸除去性能を維持することができる
リン酸イオン含有水の処理装置を提供することを目的と
する。[0005] In view of the circumstances described above, an object of the present invention is to provide a treatment apparatus for water containing phosphate ions that can suppress the formation of a passivation film and maintain phosphoric acid removal performance.
【０００６】[0006]
【課題を解決するための手段】本発明のリン酸イオン含
有水の処理装置は、電解処理槽内のリン酸イオンを含む
被処理水中に少なくとも一部が浸漬するように対向して
配置され、少なくとも一方が鉄および／またはアルミニ
ウムを含む少なくとも一対の溶解性電極と、該電極に通
電するための電源と、前記処理槽内を曝気する曝気手段
とを備えてなる処理装置であって、前記電解処理槽に流
入する被処理水の上流部位および／または前記電解処理
槽内に少なくとも一対の不溶性電極が浸漬されてなるこ
とを特徴とする。The apparatus for treating phosphate ion-containing water of the present invention is disposed so as to face at least partially soaked in water to be treated containing phosphate ions in an electrolytic treatment tank, A processing apparatus comprising: at least one pair of soluble electrodes containing at least one of iron and / or aluminum; a power supply for energizing the electrodes; and aeration means for aerating the inside of the processing bath, At least one pair of insoluble electrodes is immersed in an upstream portion of the water to be treated flowing into the treatment tank and / or in the electrolytic treatment tank.
【０００７】[0007]
【発明の実施の形態】以下、添付図面に基づいて本発明
のリン酸イオン含有水の処理装置を説明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a treatment apparatus for treating water containing phosphate ions according to the present invention.
【０００８】図１は本発明のリン酸イオン含有水の処理
装置の一実施の形態を示す説明図、図２は図１における
処理装置の拡大図、図３は不溶性電極の他の例を示す断
面図、図４は本発明のリン酸イオン含有水の処理装置の
他の実施の形態を示す説明図である。FIG. 1 is an explanatory view showing an embodiment of the treatment apparatus for treating water containing phosphate ions of the present invention, FIG. 2 is an enlarged view of the treatment apparatus in FIG. 1, and FIG. 3 shows another example of an insoluble electrode. FIG. 4 is a cross-sectional view, and FIG. 4 is an explanatory view showing another embodiment of the apparatus for treating phosphate ion-containing water of the present invention.
【０００９】本発明の処理装置は、たとえば合併浄化槽
などの排水処理装置に用いられる。合併浄化槽は、図１
に示すように、第１嫌気ろ床槽Ａと、第２嫌気ろ床槽Ｂ
と、生物ろ過槽Ｃと、処理水槽Ｄ、消毒槽Ｅとからな
り、前記第１嫌気ろ床槽Ａに流入して排水を各槽にて処
理したのち、消毒槽Ｅから排出するようにされている。
そして処理装置１が、前記処理水槽ＤからエアポンプＦ
により揚水された水を第１嫌気ろ床槽Ａへ戻す循環経路
Ｌに設置されている。The treatment apparatus of the present invention is used for a wastewater treatment apparatus such as a combined septic tank. Figure 1 shows the merged septic tank.
As shown in the figure, a first anaerobic filter tank A and a second anaerobic filter tank B
, A biological filtration tank C, a treatment water tank D, and a disinfection tank E. The water flows into the first anaerobic filter bed tank A, and the wastewater is treated in each tank, and then discharged from the disinfection tank E. ing.
Then, the processing apparatus 1 sends the air pump F
Is installed in the circulation path L for returning the water pumped to the first anaerobic filter bed tank A.
【００１０】前記処理装置１は、図２に示されるよう
に、被処理水である排水の流入口２と流出口３を有する
溶解性電極の電解処理槽４と、該電解処理槽４に流入す
る排水の上流部位に配置される不溶性電極の電解槽５と
を備えており、該電解槽５は前記流入口２に連結され、
前記循環経路Ｌに接続される流入口６を有している。As shown in FIG. 2, the treatment apparatus 1 includes an electrolytic treatment tank 4 for dissolving electrodes having an inlet 2 and an outlet 3 for wastewater as a water to be treated, and an inflow into the electrolytic treatment tank 4. And an electrolytic cell 5 of an insoluble electrode disposed at an upstream portion of the drainage to be discharged. The electrolytic cell 5 is connected to the inflow port 2,
It has an inflow port 6 connected to the circulation path L.
【００１１】前記電解処理槽４は、該電解処理槽４内の
排水中に少なくとも一部が浸漬するように対向して配置
されている一対の電極７と、該電極７に通電するための
電源８と、前記電解処理槽４内の排水中に空気を供給
し、曝気する曝気手段９とから構成されている。前記電
極７は、鉄、鉄合金、アルミニウム、アルミニウム合金
または鉄−アルミニウム合金などの鉄イオンおよび／ま
たはアルミニウムイオン発生源から作製することができ
る溶解性電極である。また前記曝気手段９は、電解処理
槽４の底中央に設置される多孔質の散気管１０または散
気板と、該散気管１０に圧縮空気を吸き込むためのエア
ポンプ１１とから構成されており、前記散気管１０とエ
アポンプ１１はパイプ１２により接続されている。な
お、前記溶解性電極７の極性反転時間としては、３０分
未満では溶出効率が低下するため、３０分以上、たとえ
ば２時間とすることができる。The electrolytic treatment tank 4 includes a pair of electrodes 7 disposed so as to be at least partially immersed in the wastewater in the electrolytic treatment tank 4, and a power supply for energizing the electrodes 7. 8 and an aeration means 9 for supplying air to the wastewater in the electrolytic treatment tank 4 and aerating it. The electrode 7 is a dissolvable electrode that can be made from a source of iron ions and / or aluminum ions, such as iron, iron alloys, aluminum, aluminum alloys or iron-aluminum alloys. The aeration means 9 includes a porous diffuser tube 10 or a diffuser plate installed at the center of the bottom of the electrolytic treatment tank 4 and an air pump 11 for sucking compressed air into the diffuser tube 10. The air diffuser 10 and the air pump 11 are connected by a pipe 12. If the polarity reversal time of the soluble electrode 7 is less than 30 minutes, the elution efficiency is reduced, so that the time can be 30 minutes or more, for example, 2 hours.
【００１２】一方、前記電解槽５は、該電解槽５内の排
水中に少なくとも一部が浸漬するように対向して配置さ
れている一対の不溶性電極１３と、該電極１３に通電す
るための電源１４とから構成されている。前記不溶性電
極１３は、たとえばフェライト、ステンレスまたは黒鉛
などの不溶性金属から作製することができるが、フェラ
イトはオゾンなどの発生が促進され、酸化効率が向上す
るため、フェライトから作製するのが好ましい。On the other hand, the electrolytic cell 5 is provided with a pair of insoluble electrodes 13 arranged so as to be at least partially immersed in the drainage water in the electrolytic cell 5, And a power supply 14. The insoluble electrode 13 can be made of an insoluble metal such as ferrite, stainless steel, or graphite. However, ferrite is preferably made of ferrite because generation of ozone and the like is promoted and oxidation efficiency is improved.
【００１３】本実施の形態では、前記処理水槽Ｄから電
解槽５に流れ込んだリン酸イオンと亜硝酸イオンを含む
排水は、電源１４の直流電流が流れる不溶性電極１３の
陽極表面または周辺で亜硝酸イオンが硝酸に酸化され
る。すなわち、硝酸イオン自体には不動態膜の発生を促
進する効果はほとんどなく、その一部が化学反応により
亜硝酸イオンに変化することで不動態膜が発生するが、
この亜硝酸イオンは不動態化促進剤として使用されてい
るので、非常に不動態膜の発生を促進する。このため、
本実施の形態では、亜硝酸イオンを硝酸に酸化すること
により、不動態膜の発生を抑制している。ついで亜硝酸
イオンが硝酸に酸化された排水は、電解処理槽４に入
り、前記溶解性電極７が鉄製である場合には、該電極７
の陽極側から溶出した鉄イオンとリン酸イオンとが凝集
反応し、不溶性のリン酸鉄が生成される。そして、この
リン酸鉄は第１嫌気ろ床層Ａへ放流され、その凝集物は
第１、第２嫌気ろ床槽Ａ、Ｂおよび生物ろ過槽Ｃで捕捉
することにより、液中からリンが除去される。In the present embodiment, the wastewater containing phosphate ions and nitrite ions flowing from the treated water tank D into the electrolytic tank 5 is treated with nitrite on or near the anode surface of the insoluble electrode 13 through which the direct current of the power supply 14 flows. The ions are oxidized to nitric acid. In other words, the nitrate ion itself has almost no effect of promoting the generation of the passivation film, and a part of the nitrate ion is changed to nitrite ion by a chemical reaction to generate the passivation film.
Since this nitrite ion is used as a passivation accelerator, it greatly promotes the formation of a passivation film. For this reason,
In the present embodiment, the generation of a passive film is suppressed by oxidizing nitrite ions to nitric acid. Then, the wastewater in which nitrite ions have been oxidized to nitric acid enters the electrolytic treatment tank 4, and when the soluble electrode 7 is made of iron,
The iron ions eluted from the anode side of the and the phosphate ions undergo an aggregation reaction to generate insoluble iron phosphate. Then, the iron phosphate is discharged to the first anaerobic filter bed layer A, and the aggregates are captured in the first and second anaerobic filter tanks A and B and the biological filtration tank C, whereby phosphorus is removed from the liquid. Removed.
【００１４】なお、本実施の形態では、鉄（アルミニウ
ム）の溶解性電極の電解処理槽の上流部位に別体の不溶
性電極による電解槽を配置しているが、本発明において
は、これに限定されるものではなく、たとえば１つの処
理室を隔壁により仕切り、溶解性電極の電解処理槽と不
溶性電極の電解槽に分けた形状とすることができる。ま
たは溶解性電極の電解処理槽内に不溶性電極を浸漬する
こともできる。また、本実施の形態では、溶解性電極と
不溶性電極に通電させる電源がそれぞれ備えられている
が、本発明においては、これに限定されるものではな
く、溶解性電極と不溶性電極に通電させる電源を兼用さ
せることもできる。電源を兼用させる場合、溶解性電極
に流す電流に対して不溶性電極に流す電流を同程度の電
流、または不溶性電極による酸化効率を向上させるため
に電流制御回路を接続して数倍程度の電流にするのが好
ましい。In the present embodiment, an electrolytic cell using a separate insoluble electrode is disposed upstream of the electrolytic treatment tank for the iron (aluminum) soluble electrode, but the present invention is not limited to this. Instead, for example, one processing chamber may be partitioned by a partition wall to have a shape that is divided into an electrolytic treatment tank for a soluble electrode and an electrolytic tank for an insoluble electrode. Alternatively, the insoluble electrode can be immersed in the electrolytic treatment tank for the soluble electrode. Further, in the present embodiment, a power supply for supplying electricity to the soluble electrode and the insoluble electrode is provided. However, the present invention is not limited to this, and a power supply for supplying electricity to the soluble electrode and the insoluble electrode. Can also be used. If the power supply is also used, the current flowing to the insoluble electrode is about the same as the current flowing to the soluble electrode, or a current control circuit is connected to improve the oxidation efficiency by the insoluble electrode to about several times the current. Is preferred.
【００１５】つぎに不溶性電極の他の例を説明する。前
記実施の形態では、フェライトなどの不溶性金属から作
製された不溶性電極が用いられているが、本実施の形態
では、導電性基材２０に白金系貴金属２１を、メッキま
たは焼結などにより被覆した不溶性電極２２とすること
ができる。前記導電性基材２０の材質としては、耐食性
の高いチタンまたはステンレスなどを用いることができ
る。また前記白金系貴金属２１としては、白金、イリジ
ウム、ルテニウムもしくはパラジウムなどまたは、たと
えば白金とイリジウムの合金などを用いることができ
る。本実施の形態では、この不溶性電極２２を使用する
ことで、白金系貴金属の触媒効果により電極間の電位が
低い場合でも電流が流れやすくなり、少ない電力で酸素
を発生させることができる。Next, another example of the insoluble electrode will be described. In the above embodiment, an insoluble electrode made of an insoluble metal such as ferrite is used, but in the present embodiment, the conductive base material 20 is coated with a platinum-based noble metal 21 by plating or sintering. The insoluble electrode 22 can be used. As a material of the conductive substrate 20, titanium or stainless steel having high corrosion resistance can be used. The platinum-based noble metal 21 may be platinum, iridium, ruthenium, palladium, or the like, or an alloy of platinum and iridium, for example. In the present embodiment, by using the insoluble electrode 22, the current easily flows even when the potential between the electrodes is low due to the catalytic effect of the platinum-based noble metal, and oxygen can be generated with low power.
【００１６】鉄（アルミニウム）の電解溶出法には、従
来公知の方法が採用でき、電極への通電は連続的でも断
続的、パルス的でもよい。通電量はリン酸や他のイオン
の濃度、排水の流量などによって異なるが、鉄イオンお
よび／またはアルミニウムイオンの排水中の濃度／リン
濃度の比（以下、「Ｆｅ／Ｐ」と略す）が０．８〜３．
０、好ましくは１．０〜２．５となるように調節すれば
よい。As a method for eluting iron (aluminum) electrolytically, a conventionally known method can be employed, and energization of the electrode may be continuous, intermittent, or pulsed. The amount of electricity varies depending on the concentration of phosphoric acid and other ions, the flow rate of wastewater, and the like, but the ratio of the concentration of iron ions and / or aluminum ions in the wastewater to the concentration of phosphorus (hereinafter abbreviated as “Fe / P”) is 0. .8-3.
It may be adjusted to be 0, preferably 1.0 to 2.5.
【００１７】本実施の形態にかかわる処理装置は前述の
ように一般家庭排水にとくに有利に利用できる。したが
って、単独で使用してもよいが、他の浄化システム、た
とえば活性汚泥法、膜分離法、嫌気・好気循環法などと
組合せて家庭用、集合住宅用の総合排水浄化システムと
することができる。また、大規模処理システム（し尿処
理場）にも利用できる。The treatment apparatus according to the present embodiment can be used particularly advantageously for general household wastewater as described above. Therefore, it may be used alone, but it may be combined with other purification systems, for example, activated sludge method, membrane separation method, anaerobic / aerobic circulation method, etc., to form a comprehensive wastewater purification system for homes and apartment houses. it can. It can also be used for large-scale processing systems (human waste processing plants).
【００１８】つぎに本発明のリン酸イオン含有水の処理
装置を前記排水以外の被処理水からリン除去を行なう水
浄化装置に適応した他の実施の形態を説明する。この水
浄化装置は、水槽で飼育している生物（熱帯魚や他の魚
介類、亀または水棲昆虫など）の糞尿や残餌などの有機
物を除去して水槽の水を浄化するための装置である。Next, a description will be given of another embodiment in which the apparatus for treating phosphate ion-containing water of the present invention is applied to a water purification apparatus for removing phosphorus from the water to be treated other than the wastewater. This water purifying device is a device for purifying water in an aquarium by removing organic matter such as manure and residual food from living things (tropical fish and other seafood, turtles or aquatic insects) raised in the aquarium. .
【００１９】図４に示されるように、水浄化装置は、水
槽５０と該水槽５０の上部に載置される濾過器５１とか
らなり、該濾過器５１は、下部容器５１ａと蓋５１ｂと
の内部に、濾過部としての濾過槽５２と、該濾過槽５２
の下流側に設けられた処理装置５３と、該処理装置５３
の下流側に設けられた脱色部としての脱色槽５４と、移
送手段としての、ストレーナ５５ａと汲上管５５ｂとを
有する汲上ポンプ５５と、返送手段としての戻し管５６
とを備えている。As shown in FIG. 4, the water purifying apparatus comprises a water tank 50 and a filter 51 mounted on the upper part of the water tank 50. The filter 51 is provided with a lower vessel 51a and a lid 51b. Inside, a filtration tank 52 as a filtration unit, and the filtration tank 52
Processing device 53 provided on the downstream side of the
A decolorizing tank 54 provided as a decolorizing section provided downstream of the pump, a pump 55 having a strainer 55a and a pump 55b as transfer means, and a return pipe 56 as return means.
And
【００２０】前記濾過槽５２は、魚介の糞尿や残餌など
の有機物を初めとする水中の浮遊物を物理濾過および生
物濾過するためのフィルタ５２ａを内蔵している。フィ
ルタ５２ａは、ポリプロピレンを原料としたニードルパ
ンチタイプのシート状不織布（たとえば、目付４００ｇ
／ｍ2、厚さ４．０ｍｍ、通気量１６０ｃｃ／ｃｍ2／ｓ
ｅｃ）が複数枚、積層されたものである。水槽５０内の
水は汲上管５５ｂを通して濾過槽５２へ汲み上げられ、
そのフィルタ５２ａで物理濾過および生物濾過を受けて
水中浮遊物が捕捉および除去される。The filter tank 52 has a built-in filter 52a for physically and biologically filtering suspended matter in water including organic matter such as manure and residual food of fish and shellfish. The filter 52a is made of a needle-punch type nonwoven fabric made of polypropylene as a raw material (for example, having a basis weight of 400 g).
/ M 2 , thickness 4.0 mm, air permeability 160 cc / cm 2 / s
ec) is a laminate of a plurality of sheets. The water in the water tank 50 is pumped to the filtration tank 52 through the suction pipe 55b,
The filter 52a undergoes physical filtration and biological filtration to capture and remove suspended matter in water.
【００２１】前記処理装置５３は、前記実施の形態にお
ける電解処理槽４と電解槽５とから構成されているが、
本実施の形態では、１つの処理室を隔壁５７により２分
割されている。前記電解処理槽４における溶解性電極７
は電極ホルダ７ａを電極固定板５８に差し込められて水
中に浸漬されている。また電解槽５における不溶性電極
１３は電極ホルダ１３ａを電極固定板５８に差し込めら
れて水中に浸漬されている。本実施の形態では、前記電
解槽５の下部に形成される流入口６から流入する水に含
まれる亜硝酸イオンが、不溶性電極１３の陽極表面また
は周辺で硝酸に酸化される。ついで亜硝酸イオンが硝酸
に酸化された水は、前記電極固定板５８に形成した流入
口２を通って電解処理槽４に入り、前記溶解性電極７が
鉄製である場合には、該電極７の陽極側から溶出した鉄
イオンとリン酸イオンとが凝集反応し、不溶性のリン酸
鉄が生成される。そして、このリン酸鉄は曝気手段９に
より浮上して排出口３から脱色槽５４に排出される。The processing apparatus 53 comprises the electrolytic processing tank 4 and the electrolytic tank 5 in the above embodiment.
In the present embodiment, one processing chamber is divided into two by a partition wall 57. Soluble electrode 7 in the electrolytic treatment tank 4
The electrode holder 7a is inserted into the electrode fixing plate 58 and is immersed in water. The insoluble electrode 13 in the electrolytic cell 5 is immersed in water with the electrode holder 13a inserted into the electrode fixing plate 58. In the present embodiment, nitrite ions contained in water flowing from an inlet 6 formed below the electrolytic cell 5 are oxidized to nitric acid on or near the anode surface of the insoluble electrode 13. Then, the water in which the nitrite ions have been oxidized to nitric acid enters the electrolytic treatment tank 4 through the inflow port 2 formed in the electrode fixing plate 58, and when the soluble electrode 7 is made of iron, the water becomes The iron ions eluted from the anode side of the and the phosphate ions undergo an aggregation reaction to generate insoluble iron phosphate. Then, the iron phosphate floats by the aeration means 9 and is discharged from the discharge port 3 to the decolorizing tank 54.
【００２２】前記脱色槽５４は、水中に浮遊し電解処理
槽４の排出口３から流出した前記リン酸鉄を除去するた
めのものであり、電解処理槽４に隣接して設けられ、そ
のリン酸鉄の除去および生物濾過を行なうためのフィル
タ５４ａを内蔵している。このフィルタ５４ａは、ポリ
プロピレンからなる、長さ１０ｍｍ程度、外径６ｍｍ程
度、内径３ｍｍ程度の中空円柱が多数、袋に収納された
ものである。The decolorizing tank 54 is for removing the iron phosphate floating in water and flowing out from the discharge port 3 of the electrolytic processing tank 4. It has a built-in filter 54a for removing acid iron and performing biological filtration. The filter 54a is a filter in which a large number of hollow cylinders made of polypropylene and having a length of about 10 mm, an outer diameter of about 6 mm, and an inner diameter of about 3 mm are stored in a bag.
【００２３】なお、本実施の形態では、電解処理槽の下
流側に脱色槽が設けられているが、本発明にかかわる水
浄化装置は、これに限定されることはなく、脱色槽のな
いものであってもよい。また本実施の形態では、濾過槽
（濾過部）が水槽上方に配された場合について説明した
が、この濾過部は、水槽内に配されて物理濾過および／
または生物濾過を行なうためのフィルタからなるもので
あってもよい。In the present embodiment, the decolorization tank is provided downstream of the electrolytic treatment tank. However, the water purification apparatus according to the present invention is not limited to this, and the water purification apparatus without the decolorization tank is used. It may be. Further, in the present embodiment, the case where the filtration tank (filtration unit) is arranged above the water tank has been described. However, this filtration unit is arranged in the water tank to perform physical filtration and / or
Alternatively, it may be composed of a filter for performing biological filtration.
【００２４】さらに、本実施の形態では、水槽の水の浄
化装置に適応したが、養殖場または水族館の浄化装置に
適応することもできる。Further, in the present embodiment, the present invention is applied to a water purifying device for an aquarium, but may be applied to a purifying device for a farm or an aquarium.
【００２５】[0025]
【発明の効果】以上説明したとおり、本発明によれば、
電解処理槽内または被処理液の流入方向から見て上流部
位に一対以上の不溶性電極を設置し、該不溶性電極に直
流電流を流すことで、不溶性電極から発生した酸素やオ
ゾンによって、被処理液中の亜硝酸イオンが硝酸イオン
に酸化されるため、電解処理槽の鉄（アルミニウム）電
極での不動態膜の発生を抑制することができる。その結
果、リン酸除去性能を維持することができる。As described above, according to the present invention,
At least one pair of insoluble electrodes is installed in the electrolytic treatment tank or at an upstream portion when viewed from the inflow direction of the liquid to be treated, and a direct current is applied to the insoluble electrode, whereby oxygen or ozone generated from the insoluble electrode causes Since the nitrite ions in the inside are oxidized to nitrate ions, it is possible to suppress the formation of a passive film at the iron (aluminum) electrode of the electrolytic treatment tank. As a result, phosphoric acid removal performance can be maintained.
【図１】本発明のリン酸イオン含有水の処理装置の一実
施の形態を示す説明図である。FIG. 1 is an explanatory diagram showing one embodiment of a treatment apparatus for treating phosphate ion-containing water of the present invention.
【図２】図１における処理装置の拡大図である。FIG. 2 is an enlarged view of the processing device in FIG.
【図３】不溶性電極の他の例を示す断面図である。FIG. 3 is a sectional view showing another example of an insoluble electrode.
【図４】本発明のリン酸イオン含有水の処理装置の他の
実施の形態を示す説明図である。FIG. 4 is an explanatory view showing another embodiment of the apparatus for treating phosphate ion-containing water of the present invention.
１ 処理装置 ２、６ 流入口 ３ 流出口 ４ 電解処理槽 ５ 電解槽 ７ 電極（溶解性電極） ８、１４ 電源 ９ 曝気手段 １０ 散気管 １１ エアポンプ １２ パイプ １３、２２ 不溶性電極 ２０ 導電性基板 ２１ 白金系貴金属 DESCRIPTION OF SYMBOLS 1 Processing apparatus 2, 6 Inflow port 3 Outflow port 4 Electrolysis processing tank 5 Electrolysis tank 7 Electrode (soluble electrode) 8, 14 Power supply 9 Aeration means 10 Aeration tube 11 Air pump 12 Pipe 13, 22 Insoluble electrode 20 Conductive substrate 21 Platinum Precious metal
フロントページの続き Ｆターム(参考） 4D038 AA05 AA08 AB46 AB47 BA02 BA04 BB10 BB17 BB18 BB19 4D040 BB32 BB72 4D061 DA06 DA08 DB18 DB19 DC13 EA03 EA06 EB01 EB04 EB19 EB27 EB28 EB30 EB31 FA13 FA14 FA15 4D062 BA04 BA17 BA23 CA03 CA04 CA18 DA07 EA36 FA01 FA16 FA26 Continued on the front page F-term (reference) 4D038 AA05 AA08 AB46 AB47 BA02 BA04 BB10 BB17 BB18 BB19 4D040 BB32 BB72 4D061 DA06 DA08 DB18 DB19 DC13 EA03 EA06 EB01 EB04 EB19 EB27 EB28 EB30 CA04 FA17 FA01 FA16 FA26
Claims (3)
理水中に少なくとも一部が浸漬するように対向して配置
され、少なくとも一方が鉄および／またはアルミニウム
を含む少なくとも一対の溶解性電極と、該電極に通電す
るための電源と、前記処理槽内を曝気する曝気手段とを
備えてなる処理装置であって、前記電解処理槽に流入す
る被処理水の上流部位および／または前記電解処理槽内
に少なくとも一対の不溶性電極が浸漬されてなるリン酸
イオン含有水の処理装置。An at least one pair of at least one dissolving electrode including iron and / or aluminum is disposed so as to be at least partially immersed in water to be treated containing phosphate ions in an electrolytic treatment tank. And a power supply for energizing the electrode, and aeration means for aerating the inside of the processing tank, wherein the upstream part of the water to be treated flowing into the electrolytic processing tank and / or the electrolytic processing An apparatus for treating phosphate ion-containing water in which at least a pair of insoluble electrodes is immersed in a tank.
貴金属が被覆されてなる請求項１記載の処理装置。2. The processing apparatus according to claim 1, wherein the insoluble electrode is formed by coating a conductive base material with a platinum-based noble metal.
求項１記載の処理装置。3. The processing apparatus according to claim 1, wherein said insoluble electrode is made of ferrite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10345699A JP2000167560A (en) | 1998-12-04 | 1998-12-04 | Treatment apparatus of phosphate ion-containing water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10345699A JP2000167560A (en) | 1998-12-04 | 1998-12-04 | Treatment apparatus of phosphate ion-containing water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000167560A true JP2000167560A (en) | 2000-06-20 |
Family
ID=18378373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10345699A Pending JP2000167560A (en) | 1998-12-04 | 1998-12-04 | Treatment apparatus of phosphate ion-containing water |
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| Country | Link |
|---|---|
| JP (1) | JP2000167560A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100602058B1 (en) | 2004-08-17 | 2006-07-14 | 정해웅 | Wastewater Treatment System through Electrolysis and Coagulation |
| JP2016524037A (en) * | 2013-05-13 | 2016-08-12 | ホガナス アクチボラグ （パブル） | Cathode, electrochemical cell and use thereof |
| WO2019207199A1 (en) * | 2018-04-22 | 2019-10-31 | Oy Elflot Ltd | Combiflotation for purification and disinfection of waste water |
-
1998
- 1998-12-04 JP JP10345699A patent/JP2000167560A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100602058B1 (en) | 2004-08-17 | 2006-07-14 | 정해웅 | Wastewater Treatment System through Electrolysis and Coagulation |
| JP2016524037A (en) * | 2013-05-13 | 2016-08-12 | ホガナス アクチボラグ （パブル） | Cathode, electrochemical cell and use thereof |
| US10676378B2 (en) | 2013-05-13 | 2020-06-09 | Höganäs Ab (Publ) | Cathode, electrochemical cell and its use |
| WO2019207199A1 (en) * | 2018-04-22 | 2019-10-31 | Oy Elflot Ltd | Combiflotation for purification and disinfection of waste water |
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