JP6687842B2 - Iron bacterium carrier, method for producing the same, and method for adjusting pH of basic solution used therein - Google Patents
Iron bacterium carrier, method for producing the same, and method for adjusting pH of basic solution used therein Download PDFInfo
- Publication number
- JP6687842B2 JP6687842B2 JP2016069849A JP2016069849A JP6687842B2 JP 6687842 B2 JP6687842 B2 JP 6687842B2 JP 2016069849 A JP2016069849 A JP 2016069849A JP 2016069849 A JP2016069849 A JP 2016069849A JP 6687842 B2 JP6687842 B2 JP 6687842B2
- Authority
- JP
- Japan
- Prior art keywords
- iron
- carrier
- bacteria
- bacterium
- waste liquid
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 107
- 229910052742 iron Inorganic materials 0.000 title claims description 52
- 241000894006 Bacteria Species 0.000 title claims description 49
- 238000000034 method Methods 0.000 title claims description 25
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000003637 basic solution Substances 0.000 title description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 49
- 239000007788 liquid Substances 0.000 claims description 49
- 239000002699 waste material Substances 0.000 claims description 41
- 241000295146 Gallionellaceae Species 0.000 claims description 39
- 239000000463 material Substances 0.000 claims description 11
- 230000007935 neutral effect Effects 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- -1 ferric iron ion Chemical class 0.000 claims description 7
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 5
- 238000001556 precipitation Methods 0.000 claims description 2
- 239000002253 acid Substances 0.000 description 14
- 238000006386 neutralization reaction Methods 0.000 description 14
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 10
- 239000002585 base Substances 0.000 description 9
- 238000010979 pH adjustment Methods 0.000 description 8
- 150000002500 ions Chemical class 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 5
- 229910001447 ferric ion Inorganic materials 0.000 description 5
- 230000003472 neutralizing effect Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910001448 ferrous ion Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000243 solution Substances 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
- 239000004375 Dextrin Substances 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920000057 Mannan Polymers 0.000 description 1
- 229920001218 Pullulan Polymers 0.000 description 1
- 239000004373 Pullulan Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 241000862969 Stella Species 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 239000000783 alginic acid Substances 0.000 description 1
- 235000010443 alginic acid Nutrition 0.000 description 1
- 229920000615 alginic acid Polymers 0.000 description 1
- 229960001126 alginic acid Drugs 0.000 description 1
- 150000004781 alginic acids Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229960004887 ferric hydroxide Drugs 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000001814 pectin Substances 0.000 description 1
- 235000010987 pectin Nutrition 0.000 description 1
- 229920001277 pectin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 235000019423 pullulan Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Description
本発明は、鉄バクテリア担持体とその作成方法と、これを用いて酸を用いない塩基性溶液の中性化へのｐＨ調整方法に関するものである。 TECHNICAL FIELD The present invention relates to an iron bacterium carrier, a method for producing the same, and a method for adjusting the pH for neutralizing a basic solution without using an acid.
従来、ｐＨ調整方法又は装置として、酸又は塩基の中和の方法がよく知られている。その中で、塩基の酸による中和を取り上げてみると、図４に示すような方法又は装置でｐＨ調整が行われている。これを説明するに、中和槽４１０に塩基（塩基）を含む塩基性廃液４２０とこれを中和するための酸４３０が導入され中和されてｐＨが中性付近になるように処理される。中性にするためには、もとになる塩基性廃液４２０のｐＨと液量と酸４３０のｐＨと液量が、ＯＨ−イオンとＨ＋イオンの量が当量になる必要があることは化学の常識であり、そのため、各々のｐＨと液量を計測モニタして、塩基性廃液４２０に対応するように酸４３０を加えなければならない。ｐＨと液量のモニタが間違っていると、処理後の廃液のｐＨが中性からずれることになる恐れがある。また、モニタの設置だけでなく、維持も面倒な対応を要求される。このような従来の中和装置として、多くの例があるが、特許文献１、特許文献２を掲げることができる。また、酸と塩基同志の中和では、中和熱が発生するため、徐々に反応させないと突沸状態になり危険であった。 Conventionally, a method of neutralizing an acid or a base is well known as a pH adjusting method or apparatus. Among them, taking a look at neutralization of a base with an acid, pH adjustment is performed by a method or apparatus as shown in FIG. To explain this, a basic waste liquid 420 containing a base (base) and an acid 430 for neutralizing the basic waste liquid 420 are introduced into the neutralization tank 410, neutralized, and treated so that the pH becomes approximately neutral. . In order to make it neutral, it is necessary that the pH and liquid amount of the basic waste liquid 420 and the pH and liquid amount of the acid 430, which are the bases, are equivalent to the amounts of OH − ions and H + ions. Therefore, it is necessary to add acid 430 so as to correspond to the basic waste liquid 420 by measuring and monitoring each pH and liquid amount. Incorrect monitoring of pH and liquid volume may cause the pH of the waste liquid after processing to deviate from neutral. Moreover, not only the installation of the monitor but also the maintenance of the monitor are troublesome. There are many examples of such a conventional neutralizing device, but Patent Document 1 and Patent Document 2 can be cited. Further, in the neutralization of the acid and the base, heat of neutralization is generated, and if it is not gradually reacted, it will be a sudden boiling state, which is dangerous.
本発明の課題は、取扱いと保存が容易な鉄バクテリア担持体とその作成方法を提供し、その結果、ｐＨの調整をする場合に、ｐＨと液量のモニタの必要性を省いて簡易な調整でもｐＨが酸性側にはずれず、且つ、一気に混ぜても徐々に反応するため中和熱による突沸的危険性がなく、加えて、高濃度塩基性廃液の中和が可能なｐＨ調整方法を提供することである。 An object of the present invention is to provide an iron bacterium carrier which is easy to handle and store and a method for producing the same, and as a result, in the case of adjusting the pH, the need for monitoring the pH and the liquid amount is omitted and simple adjustment is performed. However, the pH does not shift to the acidic side, and there is no risk of bumping due to heat of neutralization because it reacts gradually even if mixed at once, and in addition, a pH adjustment method that can neutralize highly concentrated basic waste liquid is provided. It is to be.
本発明にかかるｐＨ調整方法では、塩基のｐＨ調整に酸を使用せずに、鉄バクテリア担持体を使い、これに、塩基性廃液を通過させる、又は、塩基性廃液に鉄バクテリア担持体を投入することで、鉄バクテリアの酸化作用又は自然酸化作用（Ｆｅ２＋→Ｆｅ３＋＋ｅ−）で形成されたＦｅ３＋が塩基性を示すＯＨ−イオンと結合して沈澱することで、ＯＨ−が廃液から減少するようにしたもので、ｐＨは中性に近づくが、酸を使った場合に比べて、酸性に行くことはなく、従って、ｐＨと液量のモニタが不要となる。特に、鉄バクテリア担持体は、ろ過材に鉄バクテリアの生成した酸化鉄の泥が鉄バクテリアを仮眠状態で含んだ形で付着した形態で得られている。そのために、鉄バクテリア担持体は、培養槽から引き出す際に、ゆっくりと乾燥される。水分を抜かれた鉄バクテリアは、仮眠状態で存在するが、水中に再度投入すれば、又、増殖を開始する。更に長期の保存をする場合に対応して、乾燥後に水溶性の被覆膜で覆う。被覆膜は、酸素の侵入を制限し、紫外線を遮蔽するものが仮眠の維持に適している。
以下、請求項に沿って記述する。
In the pH adjusting method according to the present invention, an iron bacterium carrier is used without using an acid for adjusting the pH of a base, and a basic waste liquid is allowed to pass through this, or an iron bacterium carrier is added to the basic waste liquid. doing, oxidation or natural oxidation of iron bacteria (Fe 2+ → Fe 3+ + e -)
Hereinafter, description will be given according to the claims.
請求項１記載の発明は、鉄バクテリア担持体であって、ろ過材と前記ろ過材の表面に付着した酸化鉄泥と、を有し、前記酸化鉄泥は鉄バクテリアが生成したものであり、前記酸化鉄泥中には前記鉄バクテリアが仮眠状態で存在するように乾燥され、前記乾燥後の前記酸化鉄泥の表面を、紫外線吸収剤を含む水溶性の被覆膜で覆ったことを特徴とする。 The invention according to claim 1 is an iron bacteria carrier, comprising a filter medium and iron oxide mud adhered to the surface of the filter medium, and the iron oxide mud is produced by iron bacteria, The iron oxide mud is dried so that the iron bacteria are present in a nap state, and the surface of the dried iron oxide mud is covered with a water-soluble coating film containing an ultraviolet absorber. And
請求項２記載の発明は、鉄バクテリア担持体の作成方法であって、鉄バクテリアを含む酸化鉄泥又は鉄バクテリアを含む酸化鉄泥を表面に付着したろ過材と、新規のろ過材を培養槽内で接触させ培養し、前記鉄バクテリアにより新規のろ過材の上にも新たな酸化鉄泥を形成させたのち、前記鉄バクテリアが仮眠状態となるように乾燥し、
前記乾燥の後、前記ろ過材及び前記新規のろ過材に付着した前記酸化鉄泥及び前記新たな酸化鉄泥の表面を、紫外線吸収剤を含む水溶性の被覆膜で覆うことを特徴とする。
The invention according to claim 2 is a method for producing an iron bacterium carrier, wherein a filter medium having iron oxide mud containing iron bacteria or iron oxide mud containing iron bacteria adhered to the surface thereof and a novel filter medium are provided in a culture tank. After contacting and culturing in the inside, after forming a new iron oxide mud on the new filter medium by the iron bacteria, it is dried so that the iron bacteria become a nap state,
After the drying, the surface of the iron oxide mud and the new iron oxide mud adhered to the filter medium and the new filter medium is covered with a water-soluble coating film containing an ultraviolet absorber. .
請求項３記載の発明は、ｐＨ調整方法であって、
塩基性廃液の中性方向へのｐＨ調整において、前記塩基性廃液を、鉄バクテリア担持体に通過させ、又は、逆に、前記塩基性廃液に前記鉄バクテリア担持体を投入し、前記鉄バクテリア担持体の有する鉄バクテリアに、前記廃液又は前記鉄バクテリア担持体において
第一鉄を酸化させ第二鉄イオンを生成せしめ、前記第二鉄イオンが前記塩基性廃液中のＯＨ−イオンと結合し沈澱を生じることで、前記塩基性廃液中のＯＨ−イオンを減少させることにおいて、前記鉄バクテリア担持体は、請求項１に記載の鉄バクテリア担持体であるか、又は、請求項２に記載の鉄バクテリア担持体の作成方法により作成された鉄バクテリア担持体であることを特徴とする。
The invention according to
In adjusting the pH of the basic waste liquid in the neutral direction, the basic waste liquid is passed through the iron bacteria carrier, or conversely, the iron bacteria carrier is added to the basic waste liquid to carry the iron bacteria carrier. The iron bacterium contained in the body oxidizes ferrous iron in the waste liquor or the iron bacterium carrier to produce ferric iron ion, and the ferric iron ion binds to OH − ion in the basic waste liquid to cause precipitation. The iron bacterium carrier according to claim 1 or the iron bacterium according to claim 2, wherein the iron bacterium carrier is the iron bacterium carrier according to claim 1, in reducing the OH − ion in the basic waste liquid. It is an iron bacterium carrier prepared by the method for preparing a carrier.
以上の様に構成されているので、本発明によれば、ｐＨ調整で酸性に行くことはなく、ｐＨと液量のモニタが不要であり、極めて処理が容易であり、かつ、酸と塩基との中和のような中和熱による突沸的な反応もなく、安全を確保でき、更に、鉄バクテリア担持体は、扱いやすく長期の保存が可能である。 According to the present invention, since it is configured as described above, it does not go acidic by adjusting pH, does not require monitoring of pH and liquid amount, is extremely easy to process, and is There is no sudden boiling reaction due to heat of neutralization such as that of neutralization, and safety can be ensured. Further, the iron bacterium carrier is easy to handle and can be stored for a long period of time.
本発明にかかるｐＨ調整方法では、塩基を含む廃液の中和又はｐＨ調整に酸又は二酸化炭素を用いることなく、鉄バクテリア担持体に廃液を通過させ、又は、逆に、廃液に鉄バクテリア担持体を投入して、廃液中のＯＨ−イオンを第二鉄イオンが捕獲し、沈殿することで、ＯＨ−イオンを廃液中から除去するｐＨ調整方法である。
上記の鉄バクテリア担持体は、培養槽の外に出し乾燥した状態では、ろ過材に鉄バクテリアの生成した酸化鉄の泥が付着し、その中に鉄バクテリアが仮眠状態で存在する。溶液中に投入すれば、再び鉄バクテリアが増殖できる。そのために、鉄バクテリア担持体は、培養槽の外に出した後、ゆっくり乾燥する。より効果的には、薄い水溶性の被覆膜で被覆すると保存性がよい。
ろ過材は、イオン交換樹脂、活性炭、ろ過砂、多孔質セラミックなどの市販のろ過材を使用可能である。
水溶性の被覆膜としては、中性で無毒のものが好ましいが、天然材では、マンナン、ペクチン、でんぷん、アルギン酸、ゼラチン、デキストリン、プルラン等が利用でき、合成材では、弱塩基性ではあるがアクリル酸系ポリマーが利用できる。又、北海道水替事業協同組合の販売する商品名ステラパウダーも凝集材ではあるが、単独或いは、前述の他の材料と混合して利用してもよい。
尚、鉄バクテリアは、鉄酸化バクテリアとしてよく知られている。
以下図に沿って説明する。
In the pH adjusting method according to the present invention, without using an acid or carbon dioxide for neutralizing or adjusting pH of a waste liquid containing a base, the waste liquid is passed through an iron bacterium carrier, or conversely, the iron bacterium carrier is added to the waste liquid. the was charged, OH in the effluent - ions are ferric ions captured, by sedimentation, OH - a pH adjustment method for removing ions from the waste solution.
When the iron bacterium carrier is taken out of the culture tank and dried, iron oxide mud produced by iron bacterium adheres to the filter medium, and iron bacterium is present in a nap state in the mud. When put in the solution, iron bacteria can grow again. Therefore, the iron bacteria carrier is slowly dried after being taken out of the culture tank. More effectively, coating with a thin water-soluble coating film provides good storage stability.
As the filter material, commercially available filter materials such as ion exchange resin, activated carbon, filter sand, and porous ceramics can be used.
The water-soluble coating film is preferably neutral and non-toxic, but natural materials such as mannan, pectin, starch, alginic acid, gelatin, dextrin and pullulan can be used, and synthetic materials are weakly basic. However, acrylic acid polymers can be used. Further, the product name Stella powder sold by Hokkaido Water Exchange Cooperative is also an aggregating material, but it may be used alone or as a mixture with the other materials mentioned above.
Incidentally, iron bacteria are well known as iron-oxidizing bacteria.
Description will be given below with reference to the drawings.
図１は、本発明にかかる塩基性溶液のｐＨ調整方法に用いる鉄バクテリア担持体の作成プロセスの一実施態様を示す図である。
鉄バクテリア担持体の作成は以下の通りである。
ａ）新ろ過材供給：鉄バクテリアを含む酸化鉄泥又はこれらが付着したろ過材が入った培養槽に新しいろ過材を供給する。新ろ過材は、鉄バクテリアが増殖して新たな酸化鉄泥が付着する着床にする。
ｂ）ろ過材と鉄バクテリア泥の混合
ｃ）培養：鉄バクテリアが増殖する時間寝かせる。この前、又は、ｂ）の工程前に、培養槽に水、鉄材、炭素源を供給すると培養効果がある。炭素源としては二酸化炭素を用いることができ、鉄バクテリアの菌体を構成する原料となる。又、培養では、電気的培養も可能である。培養槽の水は循環して使用できる。又、増殖した鉄バクテリアは、酸化鉄の泥に住みついてろ過材に付着しているので、ａ）に戻って新たなろ過材を供給すれば、培養が繰り返される。ｄ）乾燥：培養で増えた鉄バクテリアを含む泥の一部を取り出してゆっくり乾燥する。ゆっくり水分を抜かれた鉄バクテリアは、仮眠状態で生存する。これで乾燥した扱いやすい状態の鉄バクテリア担持体を作成できる。
更にｅ）水溶性の遮蔽膜で被覆：被覆された鉄バクテリアは、更に酸素の影響を受けにくい状態となり、深い仮眠でより長い保存が可能となる。被覆材に紫外線吸収材を含ませると、紫外線による劣化を防止できる。
FIG. 1 is a diagram showing an embodiment of a process for producing an iron bacterium carrier used in the pH adjusting method for a basic solution according to the present invention.
The preparation of the iron bacterium carrier is as follows.
a) Supply of new filter medium: The new filter medium is supplied to the fermented iron oxide mud containing iron bacteria or the culture tank containing the filter medium to which these are adhered. The new filter material will be used for implantation where iron bacteria grow and new iron oxide mud adheres.
b) Mixing of filter media and iron bacterial mud c) Culture: let stand for the time during which iron bacteria grow. Before this, or before the step b), water, iron material, and carbon source are supplied to the culture tank to have a culture effect. Carbon dioxide can be used as a carbon source, and is a raw material for forming iron bacterial cells. Moreover, in the culture, electric culture is also possible. The water in the culture tank can be circulated for use. Further, since the propagated iron bacteria live in the iron oxide mud and adhere to the filter medium, the culture is repeated by returning to a) and supplying a new filter medium. d) Drying: A part of the mud containing the iron bacteria increased by the culture is taken out and slowly dried. The slowly drained iron bacteria survive in a nap state. This makes it possible to prepare an iron bacterium carrier which is dry and easy to handle.
Further, e) coating with a water-soluble shielding film: The coated iron bacteria are more resistant to oxygen and can be stored for a long time in a deep nap. If the covering material contains an ultraviolet absorber, deterioration due to ultraviolet rays can be prevented.
図３は、本発明にかかる鉄バクテリア担持体を用いたｐＨ調整方法による水素イオン濃度の時間変化の概要を示す実施態様を示す図である。
ビーカー３１０にｐＨ１３程度の塩基性廃液３２０を満たし、これに、図１の工程で作成した鉄バクテリア担持体３３０を多めに投入して、ｐＨ（ペーハー）計３４０により、ｐＨの変化を投入後からの時間に対して測定し、ｐＨを水素イオン濃度に変換して、時間に対して目盛ると略３−Ｂのような変化であった。
初期（このときの例では、１時間程度）は、水素イオン濃度変化が、最初だけ変化が遅いがすぐ急激に変化し、中期（この例では１時間から３時間の間）では水素イオン濃度変化が緩やかになった。後期（この例では３時間以降）では、再び水素イオン濃度変化が急激なって中性に近づいて行った。
数回の実験では、このような傾向は同じであった。
考えられることは、初期の変化は、乾燥した鉄バクテリア担持体に水とＯＨイオンが浸透する過程で、最初からできていた酸化鉄イオンにＯＨイオンが捕獲されて、水酸化第二鉄として固体を構成し、前からあった酸化鉄と相まって、ＯＨイオンの浸透に対して防護層となり、強い塩基廃液から鉄バクテリアを防護する。第二鉄イオンが十分供給されたので、水素イオン濃度の変化が急であったと考えられる。
中期では、利用できる第二鉄イオンがなくなると、自然酸化で第一鉄イオンから第二鉄イオンが形成される速度でＯＨイオンが捕獲されることになり、水素イオン濃度変化が緩やかになり、更に後期では、水の浸透と水素濃度が上がって塩基性が弱く中性側にシフトしたところで、鉄バクテリアが第一鉄イオンから第二鉄イオンを作る活動が活発になって再び水素イオン濃度変化が急激になっていくものと推測される。
尚、図１の工程で作成した鉄バクテリア担持体は、水中では増殖を行えるので、乾燥状態の鉄バクテリアは、活動が活発でない仮眠状態にある。
FIG. 3 is a diagram showing an embodiment showing an outline of the time change of the hydrogen ion concentration by the pH adjusting method using the iron bacterium carrier according to the present invention.
The
In the initial period (about 1 hour in this example), the change in the hydrogen ion concentration changes only slowly at the beginning, but changes rapidly immediately, and changes in the hydrogen ion concentration during the middle period (between 1 hour and 3 hours in this example). Became slower. In the latter half (after 3 hours in this example), the hydrogen ion concentration changed sharply again and the hydrogen ion concentration approached neutral.
In several experiments, this tendency was the same.
It is conceivable that the initial change is that during the process of water and OH ions permeating the dried iron bacteria carrier, OH ions were captured by the iron oxide ions that had been formed from the beginning and solidified as ferric hydroxide. And, together with the existing iron oxide, forms a protective layer against the penetration of OH ions and protects iron bacteria from strong base effluent. It is considered that the ferric ion was sufficiently supplied, so that the change in the hydrogen ion concentration was rapid.
In the mid-term, when available ferric ions are exhausted, OH ions will be captured at a rate at which ferric ions are formed from ferrous ions by natural oxidation, and the change in hydrogen ion concentration will slow down. Furthermore, in the latter half of the period, when water penetration and hydrogen concentration increased and basicity weakened and shifted to the neutral side, the activity of ferrous bacteria to make ferric ion from ferrous ion became active and the hydrogen ion concentration changed again. It is speculated that will be rapidly increasing.
Since the iron bacterium carrier prepared in the step of FIG. 1 can grow in water, the iron bacterium in a dry state is in a nap state in which the activity is not active.
図２は、本発明にかかる鉄バクテリア担持体を用いたｐＨ調整方法の一実施態様を示す図である。
図３で塩基性廃液（特に高塩基性廃液でも）の中性方向へのｐＨの調整が可能なので、図２に示す装置を構成し、
ｐＨ調整を行った。中和槽１１０内に、塩基性廃液１３０と図１で作成した鉄バクテリア担持体１２０を導入し、接触させた。それには、図のように鉄バクテリア担持体１２０の間を塩基性廃液１３０が通過するようにしてもよいし、塩基性廃液１３０中に鉄バクテリア担持体１２０をと移入して混合してもよい。
図を用いて詳述するに、中和槽１１０内には、上記の仕様の鉄バクテリア担持体１２０が内包されている。塩基性廃液１３０が中和槽１１０内に導入され、鉄バクテリア担持体１２０と接触する。前述したように、鉄バクテリア担持体１２０の鉄バクテリアは、鉄材由来の第一鉄を酸化して第二鉄イオンを生成し、第二鉄イオンは、ＯＨ−イオンと合体して沈殿を作成する。そのため、塩基性廃液１３０中のＯＨ−イオンが減少し、廃液のｐＨは強い塩基性から中性に近づく。中性に近づいた廃液は、処理後廃液１４０として捨てられるか、又は、再利用される。
この説明で分かるように、ここでは、従来例と違って、塩基性廃液、及び酸のｐＨと液量とに関係性は必要がなく、適度に多い鉄バクテリア担持体１２０を投入しておけばよい。多くても酸性になる心配はない。従って、ｐＨと液量のモニタは本質的には不要となっている。
尚、中和槽を多段に構成する、鉄バクテリア担持体１２０を撹拌する等は自由になされる。
尚、塩基性廃液、及び酸のｐＨと液量の関係はないので、必須ではないが、念の為に、処理後廃液のｐＨや処理の液量を計測モニタすることはしてもよいことは当然である。酸を使った中和と違い、突沸的過激な反応は起こらない安全な処理である。
FIG. 2 is a diagram showing one embodiment of a pH adjusting method using the iron bacterium carrier according to the present invention.
Since the pH of the basic waste liquid (especially even the highly basic waste liquid) can be adjusted to the neutral direction in FIG. 3, the device shown in FIG.
The pH was adjusted. The
As will be described in detail with reference to the drawings, the
As can be seen from this description, unlike the conventional example, there is no need for a relationship between the pH of the basic waste liquid and the amount of the liquid and the amount of the liquid, and if an appropriate amount of the iron bacterium-supporting
Incidentally, the neutralization tank may be configured in multiple stages, the
It is not essential because there is no relationship between the pH of the basic waste liquid and the acid and the liquid amount, but it is possible to measure and monitor the pH of the waste liquid after the treatment and the liquid amount of the treatment just in case, just in case. Is natural. Unlike neutralization with acid, it is a safe process that does not cause a sudden boiling reaction.
以上のように本発明にかかる鉄バクテリア担持体とその作成方法およびこれに用いた塩基性溶液のｐＨ調整方法では、ｐＨと量のモニタ行わなくともｐＨ調整で酸性に行くことはなく、極めて処理管理が容易であり、装置構成も簡略化でき、酸を使った中和のような突沸的反応は起こらないので、産業上利用して極めて好都合である。 As described above, the iron bacterium carrier according to the present invention, the method for producing the same, and the method for adjusting the pH of the basic solution used for the same, do not go acidic by pH adjustment without monitoring the pH and amount, and are extremely treated. Since it is easy to manage, the apparatus configuration can be simplified, and a bumping reaction such as neutralization using an acid does not occur, it is extremely convenient for industrial use.
１１０、４１０ 中和槽
１２０、３３０ 鉄バクテリア担持体
１３０、３２０、４２０ 塩基性廃液
１４０ 処理後廃液
３１０ ビーカー
３４０ ｐＨ計
４３０ 酸
110,410 Neutralization tank 120,330 Iron bacteria carrier 130,320,420 Basic waste liquid 140 Waste liquid after
Claims (3)
前記乾燥の後、前記ろ過材及び前記新規のろ過材に付着した前記酸化鉄泥及び前記新たな酸化鉄泥の表面を、紫外線吸収剤を含む水溶性の被覆膜で覆うことを特徴とする鉄バクテリア担持体の作成方法。 A filter medium having iron oxide mud containing iron bacteria or iron oxide mud containing iron bacteria attached to the surface and a new filter medium are brought into contact with each other and cultured in a culture tank, and the iron bacteria also cause a new filter medium on the new filter medium. After forming a new iron oxide mud, the iron bacteria are dried to a nap state,
After the drying, the surface of the iron oxide mud and the new iron oxide mud adhered to the filter medium and the new filter medium is covered with a water-soluble coating film containing an ultraviolet absorber. Method for producing iron bacteria carrier.
第一鉄を酸化させ第二鉄イオンを生成せしめ、前記第二鉄イオンが前記塩基性廃液中のＯＨ−イオンと結合し沈澱を生じることで、前記塩基性廃液中のＯＨ−イオンを減少させることにおいて、前記鉄バクテリア担持体は、請求項１に記載の鉄バクテリア担持体であるか、又は、請求項２に記載の鉄バクテリア担持体の作成方法により作成された鉄バクテリア担持体であることを特徴とするｐＨ調整方法。
In adjusting the pH of the basic waste liquid in the neutral direction, the basic waste liquid is passed through the iron bacteria carrier, or conversely, the iron bacteria carrier is added to the basic waste liquid to carry the iron bacteria carrier. The iron bacterium contained in the body oxidizes ferrous iron in the waste liquor or the iron bacterium carrier to produce ferric iron ion, and the ferric iron ion binds to OH − ion in the basic waste liquid to cause precipitation. The iron bacterium carrier according to claim 1 or the iron bacterium according to claim 2, wherein the iron bacterium carrier is the iron bacterium carrier according to claim 1, in reducing the OH − ion in the basic waste liquid. A method for adjusting pH, which is an iron bacterium carrier prepared by the method for preparing a carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016069849A JP6687842B2 (en) | 2016-03-31 | 2016-03-31 | Iron bacterium carrier, method for producing the same, and method for adjusting pH of basic solution used therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016069849A JP6687842B2 (en) | 2016-03-31 | 2016-03-31 | Iron bacterium carrier, method for producing the same, and method for adjusting pH of basic solution used therein |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2017177027A JP2017177027A (en) | 2017-10-05 |
| JP6687842B2 true JP6687842B2 (en) | 2020-04-28 |
Family
ID=60008055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2016069849A Expired - Fee Related JP6687842B2 (en) | 2016-03-31 | 2016-03-31 | Iron bacterium carrier, method for producing the same, and method for adjusting pH of basic solution used therein |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6687842B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109293000A (en) * | 2018-10-18 | 2019-02-01 | 无锡康立斯科技发展有限公司 | A kind of suspend mode storage application method of suspended biological active filler |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60122098A (en) * | 1983-12-02 | 1985-06-29 | Kenji Ichikawa | Microorganism tabelt |
| JPH01266897A (en) * | 1988-04-19 | 1989-10-24 | Keiji Goto | Continuous moving bed type iron removing method for utilizing iron bacteria |
| JPH0813358B2 (en) * | 1990-03-28 | 1996-02-14 | 株式会社クボタ | Iron bacterial carrier |
| JP2005313017A (en) * | 2004-04-27 | 2005-11-10 | Dowa Techno Engineering Co Ltd | Oxidizing/neutralizing method using iron oxidizing bacteria and neutralizer |
| JP2006136799A (en) * | 2004-11-11 | 2006-06-01 | Wako Concrete Kogyo Kk | Water quality improvement method by napping microorganism |
| JP2006288221A (en) * | 2005-04-06 | 2006-10-26 | Kansai Electric Power Co Inc:The | Method for preserving photosynthetic bacterium and preserved material of photosynthetic bacterium obtained by the method |
| JP4632178B2 (en) * | 2006-11-01 | 2011-02-16 | 株式会社日立プラントテクノロジー | Operating method of anaerobic ammonia oxidation tank |
| JP2009073687A (en) * | 2007-09-20 | 2009-04-09 | Ikuro Takeda | Method for collecting iron bacteria accumulation |
| JP6194451B2 (en) * | 2014-06-16 | 2017-09-13 | 株式会社システック | Concrete or cement structure wastewater treatment equipment |
| JP6403465B2 (en) * | 2014-07-09 | 2018-10-10 | 株式会社安藤・間 | Method for immobilizing bacteria, carrier for immobilizing bacteria, and method for preserving bacteria |
-
2016
- 2016-03-31 JP JP2016069849A patent/JP6687842B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017177027A (en) | 2017-10-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6687842B2 (en) | Iron bacterium carrier, method for producing the same, and method for adjusting pH of basic solution used therein | |
| EP2792645B1 (en) | Process for removing fluorides from water | |
| CN106373627A (en) | Method for treating radioactive waste liquid in nuclear power plant through electrochemical synthesis of ferrite | |
| CN111995155A (en) | Method for recycling ammoniacal nitrogen-containing acidic wastewater | |
| CN108324578B (en) | Liquid-phase mineralized precursor and method for repairing demineralized dentin | |
| KR20120033863A (en) | Iron and manganese-coated sand, methods for producing the same, and methods for purifying sewage that contains heavy metals using the same | |
| CN106186175B (en) | A kind of method of the photochemical degradating of phosphorus-containing wastewater | |
| Park et al. | A study on the biological treatment of acid pickling wastewater containing a high concentration of nitrate nitrogen | |
| CN107758959A (en) | A kind of processing method of industrial wastewater | |
| CN102527325A (en) | Aluminum-modified attapulgite adsorbent and preparation method and application | |
| KR101694357B1 (en) | Method of Manufacturing Coating Carrier for Phosphorus Removal | |
| Lee et al. | Adsorption kinetics and isotherms of phosphate and its removal from wastewater using mesoporous titanium oxide | |
| Wang et al. | Polyvinylidene fluoride cladded calcite tablet for phosphate removal and reclamation from aqueous solution | |
| CN106746043A (en) | A kind of deep-purifying method of compound micro-polluted source water | |
| CN113307448A (en) | Underground water denitrification method and reactor of zero-valent iron autotrophic denitrification coupling biochar PRB | |
| CN107055624B (en) | A kind of production technology preparing potassium ferrate | |
| KR101286417B1 (en) | Phosphorus removal filter metal for wastewater treatment by using porous metal and manufacturing method | |
| CN105858843A (en) | Ammonia nitrogen recovery system for hair product wastewater and operating method of system | |
| JPH0448995A (en) | Water treatment | |
| Issabayeva et al. | Rubber industry wastewater treatment: Adsorption of zinc | |
| JP6464391B2 (en) | Bacterial implantation material and iron assembly used for iron bacteria culture | |
| FELIX | THE EFFECTS OF AQUATIC HUMIC SUBSTANCES AND OZONATION ON THE STABILITY OF PARTICLES (COAGULATION, FULVIC, OZONE, ALUMINA, IRON) | |
| KR101036805B1 (en) | Manufacturing method of effective macroorganism active substances and effective macroorganism active substances using thereof | |
| CN104826575A (en) | Preparation method of triclocarban adsorbent purifying agent | |
| JP5988226B2 (en) | Phosphorus removal material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20160404 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20160621 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20160802 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20180525 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20180529 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20190220 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20190319 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20190425 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20190903 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20191028 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20200303 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20200316 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6687842 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| LAPS | Cancellation because of no payment of annual fees |