JP6278589B2 - Peracetic acid-containing wastewater treatment apparatus and peracetic acid-containing wastewater treatment method - Google Patents
Peracetic acid-containing wastewater treatment apparatus and peracetic acid-containing wastewater treatment method Download PDFInfo
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- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 title claims description 158
- 238000004065 wastewater treatment Methods 0.000 title claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 100
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 99
- 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 claims description 88
- 239000003957 anion exchange resin Substances 0.000 claims description 74
- 239000002351 wastewater Substances 0.000 claims description 66
- 239000003456 ion exchange resin Substances 0.000 claims description 58
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 58
- 239000003729 cation exchange resin Substances 0.000 claims description 31
- 239000011347 resin Substances 0.000 claims description 30
- 229920005989 resin Polymers 0.000 claims description 30
- 150000001768 cations Chemical class 0.000 claims description 28
- 230000002378 acidificating effect Effects 0.000 claims description 26
- 238000005349 anion exchange Methods 0.000 claims description 26
- 238000005342 ion exchange Methods 0.000 claims description 23
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 18
- 238000012545 processing Methods 0.000 claims description 12
- 230000008929 regeneration Effects 0.000 claims description 12
- 238000011069 regeneration method Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000003672 processing method Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 7
- 230000001172 regenerating effect Effects 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 2
- 238000011946 reduction process Methods 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 16
- KEUKAQNPUBYCIC-UHFFFAOYSA-N ethaneperoxoic acid;hydrogen peroxide Chemical compound OO.CC(=O)OO KEUKAQNPUBYCIC-UHFFFAOYSA-N 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 150000001450 anions Chemical class 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 235000013361 beverage Nutrition 0.000 description 6
- 229920001429 chelating resin Polymers 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- -1 for example Chemical compound 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000012492 regenerant Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 238000005251 capillar electrophoresis Methods 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 238000004255 ion exchange chromatography Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000012609 strong anion exchange resin Substances 0.000 description 1
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- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Description
本発明は、過酢酸含有排水の処理装置および処理方法、特に飲料製品等の充填前のペットボトル等の容器等を洗浄、殺菌した際に発生する過酢酸含有排水の処理装置および処理方法に関する。 The present invention relates to a processing apparatus and a processing method for peracetic acid-containing wastewater, and more particularly to a processing apparatus and a processing method for peracetic acid-containing wastewater generated when a container such as a PET bottle before filling of beverage products or the like is washed and sterilized.
食品業界等、例えば、飲料分野では、飲料製品の充填前のペットボトル等の容器を洗浄、殺菌するため、オキソニア（酢酸、過酢酸および過酸化水素が混合された洗浄液）に代表される殺菌剤を用いる場合がある。ペットボトルにオキソニア等を噴射して洗浄、殺菌を行うが、この際、ペットボトルに残留したオキソニア等を水道水または純水で流しており、オキソニア等を含む洗浄排水が発生する。なお、一般に、ペットボトル等を洗浄する水はリンサー水、洗浄後の水はリンサー排水と呼ばれる。 In the food industry, for example, in the beverage field, a disinfectant represented by oxonia (a cleaning liquid in which acetic acid, peracetic acid and hydrogen peroxide are mixed) is used to clean and sterilize containers such as PET bottles before filling with beverage products. May be used. Oxonia or the like is jetted into a plastic bottle for cleaning and sterilization. At this time, oxonia or the like remaining in the plastic bottle is flushed with tap water or pure water, and cleaning wastewater containing oxonia or the like is generated. In general, water for washing PET bottles or the like is called rinser water, and water after washing is called rinser drainage.
このオキソニア等を含むリンサー排水は、酢酸、過酢酸等の有機物を含むため、排出する前に処理を行う必要がある。また、昨今の環境意識の高まり等により、各飲料メーカーでは、リンサー排水を水回収し、再利用することで水の使用量を削減することを検討している。 The rinser wastewater containing oxonia and the like contains organic substances such as acetic acid and peracetic acid, and therefore needs to be treated before being discharged. In addition, due to the recent increase in environmental awareness, beverage manufacturers are considering reducing the amount of water used by collecting and reusing the rinser wastewater.
有機酸系殺菌剤の代表例であるオキソニアの主成分は、上記の通り、酢酸、過酢酸および過酸化水素である。オキソニアを含むリンサー排水の処理システムとしては、例えば、まず活性炭等を充填した還元装置において過酢酸および過酸化水素の還元を行い、次いで酢酸をイオン交換樹脂や逆浸透膜（ＲＯ膜）等で除去する方法がある。 As described above, the main components of oxonia, which is a representative example of organic acid fungicides, are acetic acid, peracetic acid and hydrogen peroxide. As a treatment system for rinser wastewater containing oxonia, for example, peracetic acid and hydrogen peroxide are first reduced in a reduction device filled with activated carbon, and then acetic acid is removed with an ion exchange resin or reverse osmosis membrane (RO membrane). There is a way to do it.
例えば、特許文献１には、過酢酸含有水を活性炭と接触させた後、強酸性カチオン交換樹脂、弱塩基性アニオン交換樹脂の順序で接触させる方法が開示されている。特許文献２には、過酢酸含有排水を活性炭と接触させた後、弱塩基性アニオン交換樹脂、強酸性カチオン交換樹脂の順序で接触させる方法や、過酢酸含有排水を活性炭と接触させた後、強酸性カチオン交換樹脂および強塩基性アニオン交換樹脂の混床と接触させる方法が開示されている。 For example, Patent Document 1 discloses a method in which peracetic acid-containing water is brought into contact with activated carbon and then contacted in the order of a strongly acidic cation exchange resin and a weakly basic anion exchange resin. In Patent Document 2, after contacting peracetic acid-containing wastewater with activated carbon, a method in which the weakly basic anion exchange resin and strong acid cation exchange resin are contacted in this order, or after contacting peracetic acid-containing wastewater with activated carbon, A method of contacting with a mixed bed of a strongly acidic cation exchange resin and a strongly basic anion exchange resin is disclosed.
このように、過酢酸含有排水を活性炭とイオン交換樹脂の組み合わせで処理する場合、後段のイオン交換樹脂への負荷はほとんどが酢酸由来のアニオン負荷であるので、特許文献１に示される方法では、処理に必要な総樹脂量が増え、イニシャルコストが高くなるという問題がある。特許文献２に示される方法の場合、被処理水中に水道水や他の薬液由来のカチオンが共存する場合、弱塩基性アニオン交換樹脂で先に酢酸を処理すると、共存カチオンの影響を受け、処理水中に酢酸が残存する可能性がある。また、強塩基性アニオン交換樹脂を用いた場合、処理水中の酢酸の残存量は低減されるが、一方で再生剤の使用量が増えランニングコストが高くなるという問題がある。 Thus, when the peracetic acid-containing wastewater is treated with a combination of activated carbon and an ion exchange resin, most of the load on the ion exchange resin in the subsequent stage is an anion load derived from acetic acid. There is a problem that the total amount of resin required for the treatment increases and the initial cost increases. In the case of the method shown in Patent Document 2, when cations derived from tap water or other chemicals coexist in the water to be treated, if acetic acid is first treated with a weakly basic anion exchange resin, it is affected by the coexisting cations and treated. Acetic acid may remain in the water. In addition, when a strongly basic anion exchange resin is used, the residual amount of acetic acid in the treated water is reduced, but there is a problem that the amount of regenerant used increases and the running cost increases.
本発明の目的は、カチオンが共存する場合でも、過酢酸含有排水を効率的に処理することができ、処理水中の酢酸の残存量を低減することができる過酢酸含有排水の処理装置および過酢酸含有排水の処理方法を提供することにある。 An object of the present invention is to provide a peracetic acid-containing wastewater treatment apparatus and peracetic acid that can efficiently treat peracetic acid-containing wastewater even when cations coexist and can reduce the residual amount of acetic acid in the treated water. It is in providing the processing method of contained wastewater.
本発明は、硬度成分を含む過酢酸含有排水を還元処理する還元手段と、前記還元処理された還元処理水をアニオン交換処理するための、弱塩基性アニオン交換樹脂を充填したアニオン交換樹脂塔と、前記アニオン交換処理されたアニオン交換処理水をイオン交換処理するための、強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂とを充填した混床式イオン交換樹脂塔と、前記混床式イオン交換樹脂塔の後段に設置した水質測定手段と、を備え、前記過酢酸含有排水は、酢酸、過酢酸および過酸化水素を含むオキソニア排水であり、前記混床式イオン交換樹脂塔における強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂との充填比率が、カチオンブレークが先に起こるようにコントロールされる、過酢酸含有排水の処理装置である。 The present invention includes a reducing means for reducing peracetic acid-containing wastewater containing a hardness component, and an anion exchange resin tower packed with a weakly basic anion exchange resin for anion exchange treatment of the reduced treated water. the for the anion exchange treated anion exchange treated water to ion exchange treatment, a mixed bed ion exchange resin column filled with a strongly acidic cation exchange resin and strongly basic anion exchange resins, the mixed bed ion and a water quality measuring means placed downstream of the exchange resin column, the peracetic acid-containing wastewater, acetate, Ri Okisonia wastewater der containing peracetic acid and hydrogen peroxide, strongly acidic in the mixed-bed ion exchange resin column filling ratio of cation exchange resin and strongly basic anion exchange resin, cation break Ru is controlled to occur earlier, a processor of peracetic acid-containing wastewater.
また、前記過酢酸含有排水の処理装置において、前記混床式イオン交換樹脂塔における強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂との充填比率が１：１〜１：４であることが好ましい。 Further, in the processing apparatus of the peracetic acid-containing wastewater, fill ratio of the strongly acidic cation exchange resin and strongly basic anion-exchange resins in the mixed bed ion exchange resin column is 1: 1 to 1: to be 4 preferable.
また、前記過酢酸含有排水の処理装置において、前記混床式イオン交換樹脂塔を複数備え、前記水質測定手段による測定結果に基づき、前記複数の混床式イオン交換樹脂塔の通水経路を切り替える通水経路切り替え手段をさらに備えることが好ましい。 Further, the peracetic acid-containing wastewater treatment apparatus includes a plurality of the mixed bed type ion exchange resin towers, and switches water flow paths of the plurality of mixed bed type ion exchange resin towers based on a measurement result by the water quality measuring unit. It is preferable to further include a water flow path switching means.
また、前記過酢酸含有排水の処理装置において、前記混床式イオン交換樹脂塔の樹脂を再生する混床式イオン交換樹脂塔再生手段と、前記混床式イオン交換樹脂塔の再生排水を用いて前記アニオン交換樹脂塔の樹脂を再生するアニオン交換樹脂塔再生手段と、を備えることが好ましい。 In the peracetic acid-containing wastewater treatment apparatus, the mixed bed ion exchange resin tower regeneration means for regenerating the resin of the mixed bed ion exchange resin tower and the recycled wastewater of the mixed bed ion exchange resin tower are used. And an anion exchange resin tower regeneration means for regenerating the resin of the anion exchange resin tower.
また、本発明は、硬度成分を含む過酢酸含有排水を還元処理する還元工程と、前記還元処理された還元処理水を、弱塩基性アニオン交換樹脂を用いてアニオン交換処理するアニオン交換工程と、前記アニオン交換処理されたアニオン交換処理水を、強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂との混床を用いてイオン交換処理する混床式イオン交換工程と、前記混床式イオン交換工程の後段において水質測定を行う工程と、を含み、前記過酢酸含有排水は、酢酸、過酢酸および過酸化水素を含むオキソニア排水であり、前記混床式イオン交換工程における強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂との充填比率を、カチオンブレークが先に起こるようにコントロールする、過酢酸含有排水の処理方法である。 The present invention also includes a reduction step of reducing peracetic acid-containing wastewater containing a hardness component, an anion exchange step of subjecting the reduced treated water to an anion exchange treatment using a weakly basic anion exchange resin, wherein the anion exchange treated anion exchange treated water, and mixed bed ion exchange process for ion-exchange treatment using a mixed bed of a strongly acidic cation exchange resin and strongly basic anion exchange resins, the mixed bed ion exchange includes a step of performing water quality measurement in a later step, the said peracetic acid-containing wastewater, acetate, Ri Okisonia wastewater der containing peracetic acid and hydrogen peroxide, a strong acid cation exchange resin in the mixed bed ion exchange step filling ratio of the strong base anion exchange resin, cation break that will control to occur earlier, a processing method of peracetic acid-containing wastewater.
また、前記過酢酸含有排水の処理方法において、前記混床式イオン交換工程における強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂との充填比率が１：１〜１：４であることが好ましい。 Further, in the above processing method of peracetic acid-containing wastewater, fill ratio of the strongly acidic cation exchange resin and strongly basic anion-exchange resins in the mixed bed ion exchange step is 1: 1 to 1: preferably a 4 .
また、前記過酢酸含有排水の処理方法において、前記混床式イオン交換工程において混床式イオン交換樹脂塔を複数用い、前記混床式イオン交換工程の後段における水質測定結果に基づき、前記複数の混床式イオン交換樹脂塔の通水経路を切り替えることが好ましい。 Further, in the method for treating peracetic acid-containing wastewater, a plurality of mixed bed type ion exchange resin towers are used in the mixed bed type ion exchange step, and based on the water quality measurement results in the latter stage of the mixed bed type ion exchange step, the plurality of It is preferable to switch the water flow path of the mixed bed type ion exchange resin tower.
また、前記過酢酸含有排水の処理方法において、前記混床の再生排水を用いて前記弱塩基性アニオン交換樹脂を再生することが好ましい。 In the method for treating peracetic acid-containing wastewater, the weakly basic anion exchange resin is preferably regenerated using the recycled wastewater from the mixed bed.
本発明では、過酢酸含有排水を還元処理した後、弱塩基性アニオン交換樹脂によるアニオン交換処理、強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂または弱塩基性アニオン交換樹脂との混床による混床式イオン交換処理の順序で処理することにより、カチオンが共存する場合でも、過酢酸含有排水を効率的に処理することができ、処理水中の酢酸の残存量を低減することができる。 In the present invention, after reducing peracetic acid-containing wastewater, anion exchange treatment with a weakly basic anion exchange resin, mixing by a mixed bed of a strongly acidic cation exchange resin and a strongly basic anion exchange resin or a weakly basic anion exchange resin. By treating in the order of bed type ion exchange treatment, even when cations coexist, peracetic acid-containing wastewater can be treated efficiently, and the remaining amount of acetic acid in the treated water can be reduced.
本発明の実施の形態について以下説明する。本実施形態は本発明を実施する一例であって、本発明は本実施形態に限定されるものではない。 Embodiments of the present invention will be described below. This embodiment is an example for carrying out the present invention, and the present invention is not limited to this embodiment.
本発明者らは、過酢酸含有排水、特に従来効率的に処理することが困難であったカチオンが共存する過酢酸含有排水の処理について検討したところ、還元処理した後、弱塩基性アニオン交換樹脂によるアニオン交換処理、強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂または弱塩基性アニオン交換樹脂との混床による混床式イオン交換処理の順序で処理することにより、カチオンが共存する場合でも、過酢酸含有排水を効率的に処理することができ、処理水中の酢酸の残存量を低減することが可能となることを見出した。 The present inventors have examined the treatment of peracetic acid-containing wastewater, particularly peracetic acid-containing wastewater in which cations that have conventionally been difficult to treat efficiently coexist, and after reduction treatment, weakly basic anion exchange resin Even if cations coexist by treating in the order of mixed bed type ion exchange treatment by mixed bed of strong anion exchange resin and strong basic anion exchange resin or weakly basic anion exchange resin, anion exchange treatment by It has been found that peracetic acid-containing wastewater can be treated efficiently and the remaining amount of acetic acid in the treated water can be reduced.
本発明の実施形態に係る過酢酸含有排水の処理装置の一例の概略を図１に示し、その構成について説明する。過酢酸含有排水処理装置１は、原水槽１０と、還元手段としての還元塔１２と、弱塩基性アニオン交換樹脂を充填したアニオン交換樹脂塔１４と、強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂または弱塩基性アニオン交換樹脂との混床を充填した混床式イオン交換樹脂塔１６とを備える。 The outline of an example of the processing apparatus of the peracetic acid containing waste water which concerns on embodiment of this invention is shown in FIG. 1, and the structure is demonstrated. The peracetic acid-containing wastewater treatment apparatus 1 includes a raw water tank 10, a reduction tower 12 as a reducing means, an anion exchange resin tower 14 filled with a weakly basic anion exchange resin, a strongly acidic cation exchange resin, and a strongly basic anion exchange. And a mixed bed ion exchange resin column 16 filled with a mixed bed of resin or weakly basic anion exchange resin.
図１の過酢酸含有排水処理装置１において、原水槽１０の出口はポンプ１８を介して原水配管２０により還元塔１２の入口に接続され、還元塔１２の出口は還元処理水配管２２によりアニオン交換樹脂塔１４の入口に接続され、アニオン交換樹脂塔１４の出口はアニオン交換処理水配管２４により混床式イオン交換樹脂塔１６の入口に接続され、混床式イオン交換樹脂塔１６の出口には処理水配管２６が接続されている。処理水配管２６には、水質測定手段として電気伝導率計２８が設置されていてもよい。 In the peracetic acid-containing wastewater treatment apparatus 1 shown in FIG. 1, the outlet of the raw water tank 10 is connected to the inlet of the reduction tower 12 through the pump 18 through the raw water pipe 20, and the outlet of the reduction tower 12 is anion exchanged through the reduction treatment water pipe 22. Connected to the inlet of the resin tower 14, the outlet of the anion exchange resin tower 14 is connected to the inlet of the mixed bed ion exchange resin tower 16 through an anion exchange treated water pipe 24, and the outlet of the mixed bed ion exchange resin tower 16 A treated water pipe 26 is connected. An electrical conductivity meter 28 may be installed in the treated water pipe 26 as water quality measuring means.
本実施形態に係る過酢酸含有排水の処理方法および過酢酸含有排水処理装置１の動作について説明する。 The operation of the peracetic acid-containing wastewater treatment method and the peracetic acid-containing wastewater treatment apparatus 1 according to the present embodiment will be described.
原水槽１０に貯留された原水である過酢酸含有排水は、ポンプ１８により原水配管２０を通して還元塔１２に送液され、下向流で通液される。還元塔１２において、還元処理が行われる（還元工程）。還元塔１２において還元処理が行われた還元処理水は、還元処理水配管２２を通してアニオン交換樹脂塔１４に送液され、下向流で通液される。アニオン交換樹脂塔１４において、弱塩基性アニオン交換樹脂を用いてアニオン交換処理が行われる（アニオン交換工程）。アニオン交換樹脂塔１４においてアニオン交換処理が行われたアニオン交換処理水は、アニオン交換処理水配管２４を通して混床式イオン交換樹脂塔１６に送液され、下向流で通液される。混床式イオン交換樹脂塔１６において、強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂または弱塩基性アニオン交換樹脂との混床を用いてイオン交換処理が行われる（混床式イオン交換工程）。混床式イオン交換樹脂塔１６において混床式イオン交換処理が行われた処理水は、処理水配管２６を通して排出される。 Peracetic acid-containing wastewater, which is raw water stored in the raw water tank 10, is sent to the reduction tower 12 through the raw water pipe 20 by the pump 18 and is passed in a downward flow. Reduction processing is performed in the reduction tower 12 (reduction process). The reduced water that has been subjected to the reduction treatment in the reduction tower 12 is sent to the anion exchange resin tower 14 through the reduction treatment water pipe 22 and passed therethrough in a downward flow. In the anion exchange resin tower 14, an anion exchange treatment is performed using a weakly basic anion exchange resin (anion exchange step). The anion exchange treated water that has been subjected to the anion exchange treatment in the anion exchange resin tower 14 is sent to the mixed bed ion exchange resin tower 16 through the anion exchange treated water pipe 24 and passed therethrough in a downward flow. In the mixed bed type ion exchange resin tower 16, ion exchange treatment is performed using a mixed bed of a strongly acidic cation exchange resin and a strongly basic anion exchange resin or a weakly basic anion exchange resin (mixed bed type ion exchange process). . The treated water that has undergone the mixed bed type ion exchange treatment in the mixed bed type ion exchange resin tower 16 is discharged through the treated water pipe 26.
過酢酸含有排水処理装置１において、処理水の水質として電気伝導率が、電気伝導率計２８により測定されてもよい。混床式イオン交換樹脂塔１６のカチオン樹脂量の調整、および混床式イオン交換樹脂塔１６の後段への電気伝導率計２８の設置を行い、電気伝導率を測定することで、酢酸リークよりもカチオンリークを監視することができる。万が一、処理水に酢酸がリークしてしまった場合、例えば水道水質基準であるＴＯＣ ３ｍｇ／Ｌ以下を超過するおそれがある。そのため、アニオンよりもカチオンが先にリークするように混床式イオン交換樹脂塔１６の樹脂量を調整することで水質基準基準を満たすようにし、処理水の水質を監視すればよい。 In the peracetic acid-containing wastewater treatment apparatus 1, the electrical conductivity may be measured by the electrical conductivity meter 28 as the quality of the treated water. By adjusting the amount of cation resin in the mixed bed type ion exchange resin tower 16 and installing the electric conductivity meter 28 in the subsequent stage of the mixed bed type ion exchange resin tower 16, and measuring the electric conductivity, the acetic acid leak Even cation leaks can be monitored. In the unlikely event that acetic acid leaks into the treated water, for example, there is a risk of exceeding the TOC 3 mg / L or less, which is a tap water quality standard. Therefore, the quality of the treated water may be monitored by adjusting the amount of resin in the mixed bed ion exchange resin tower 16 so that the cation leaks before the anion so as to satisfy the water quality standard.
本実施形態では、還元塔１２で還元処理した還元処理水を、弱塩基性アニオン交換樹脂を充填したアニオン交換樹脂塔１４、次に、強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂または弱塩基性アニオン交換樹脂とを充填した混床式イオン交換樹脂塔１６の順で処理することで、酢酸を効率よく除去することができ、かつ、総樹脂量を低減することができる。装置の後段に設置した混床式イオン交換樹脂塔１６の効果により、弱塩基性アニオン交換樹脂によるアニオン交換処理水中に酢酸がわずかに含まれる場合でも、効率よく除去でき、処理水水質も非常に良好なものが得られる。すなわち、処理水水質に対する費用対効果の最適化が図られる。 In this embodiment, the reduced water treated in the reduction tower 12 is treated with the anion exchange resin tower 14 filled with the weak base anion exchange resin, then the strong acid cation exchange resin and the strong base anion exchange resin or the weak base. By treating in the order of the mixed bed type ion exchange resin tower 16 filled with the functional anion exchange resin, acetic acid can be efficiently removed and the total resin amount can be reduced. Due to the effect of the mixed bed type ion exchange resin tower 16 installed at the latter stage of the apparatus, even if a slight amount of acetic acid is contained in the anion exchange treated water by the weakly basic anion exchange resin, it can be efficiently removed and the quality of the treated water is very high. A good one is obtained. In other words, cost effectiveness can be optimized for the quality of treated water.
イオン交換樹脂塔を複数列設け交互運転またはローテーション運転した場合等、停止中の塔内では、過酢酸含有排水中の酢酸等の有機物が栄養源となり、細菌増殖が起こる可能性がある。配管や、還元塔に用いられる活性炭等は熱水殺菌が可能であるが、イオン交換樹脂塔に用いられるイオン交換樹脂は、通常耐熱温度が低いため熱水殺菌を行うことが困難である。しかし、本実施形態に係る過酢酸含有排水装置１では、装置の後段への混床式イオン交換樹脂塔１６の設置により、カチオン樹脂とアニオン樹脂が混在するため、局所的なｐＨの変化により細菌が増殖しにくい効果が得られる。 When a plurality of rows of ion exchange resin towers are provided and alternate operation or rotation operation is performed, organic matter such as acetic acid in peracetic acid-containing wastewater may become a nutrient source in the stopped tower, and bacterial growth may occur. Hot water sterilization is possible for pipes and activated carbon used in a reduction tower, but ion exchange resins used in ion exchange resin towers are usually difficult to perform hot water sterilization because of their low heat-resistant temperatures. However, in the peracetic acid-containing drainage device 1 according to the present embodiment, the cation resin and the anion resin are mixed due to the installation of the mixed bed type ion exchange resin tower 16 in the subsequent stage of the device, and therefore bacteria due to a local pH change. The effect that it is hard to proliferate is acquired.
混床式イオン交換樹脂塔１６における強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂または弱塩基性アニオン交換樹脂との充填比率は、１：１〜１：４であることが好ましく、１：１〜１：２であることがより好ましい。アニオン交換樹脂に比べてカチオン交換樹脂の樹脂比率を下げることで、カチオンブレークが先に起こるようにコントロールできるため、アニオン交換樹脂からの酢酸リークによる処理水ＴＯＣの上昇を防ぐ効果がある。混床式イオン交換樹脂塔１６において用いる混床は、強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂の混床、または強酸性カチオン交換樹脂と弱塩基性アニオン交換樹脂の混床であるが、処理水水質向上等の点から、強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂の混床が好ましい。 The packing ratio of the strongly acidic cation exchange resin and the strongly basic anion exchange resin or weakly basic anion exchange resin in the mixed bed type ion exchange resin tower 16 is preferably 1: 1 to 1: 4, and 1: 1. More preferably, it is ˜1: 2. By reducing the resin ratio of the cation exchange resin as compared to the anion exchange resin, it can be controlled so that the cation break occurs first, and therefore, there is an effect of preventing an increase in the treated water TOC due to acetic acid leak from the anion exchange resin. The mixed bed used in the mixed bed ion exchange resin tower 16 is a mixed bed of a strongly acidic cation exchange resin and a strongly basic anion exchange resin, or a mixed bed of a strong acid cation exchange resin and a weakly basic anion exchange resin. From the viewpoint of improving the quality of treated water, a mixed bed of a strongly acidic cation exchange resin and a strongly basic anion exchange resin is preferable.
また、過酢酸含有排水の場合、ほとんどが酢酸等に由来するアニオン負荷なので、カチオン樹脂量はより少ない比率で良いと考えられる。カチオン樹脂量を減らすことにより、カチオン樹脂量とアニオン樹脂量の和である総樹脂量の低減によるイニシャルコストを低減することができる。 In addition, in the case of peracetic acid-containing wastewater, since most of the anion load is derived from acetic acid or the like, it is considered that a smaller proportion of the cation resin is sufficient. By reducing the amount of the cationic resin, the initial cost due to the reduction of the total amount of the resin, which is the sum of the amount of the cationic resin and the amount of the anionic resin, can be reduced.
還元手段としては、過酢酸含有排水に含まれる過酢酸、過酸化水素等を還元処理することができる装置であればよく、特に制限はない。還元塔１２を用いる場合、還元塔１２内に充填される充填材には特に制限はなく、例えば、活性炭、触媒等が挙げられ、費用対効果等の観点から活性炭が好ましい。 The reducing means is not particularly limited as long as it is a device capable of reducing peracetic acid, hydrogen peroxide, etc. contained in peracetic acid-containing wastewater. When using the reduction tower 12, there is no restriction | limiting in particular in the filler filled in the reduction tower 12, For example, activated carbon, a catalyst, etc. are mentioned, Activated carbon is preferable from viewpoints, such as cost effectiveness.
アニオン交換樹脂塔１４および混床式イオン交換樹脂塔１６において用いられる弱塩基性アニオン交換樹脂としては、例えば、ＤＩＡＩＯＮ ＷＡ２１（三菱化学製）、ＡＭＢＥＲＬＩＴＥ ＩＲＡ６７（ダウ・ケミカル製）等の市販品を用いることができる。 As the weakly basic anion exchange resin used in the anion exchange resin tower 14 and the mixed bed type ion exchange resin tower 16, for example, commercially available products such as DIAION WA21 (manufactured by Mitsubishi Chemical), AMBERLITE IRA67 (manufactured by Dow Chemical) are used. be able to.
混床式イオン交換樹脂塔１６において用いられる強酸性カチオン交換樹脂としては、例えば、ＤＩＡＩＯＮ ＳＫ１Ｂ（三菱化学製）、ＡＭＢＥＲＬＩＴＥ ＩＲ１２４（ダウ・ケミカル製）等の市販品を用いることができる。 Commercially available products such as DIAION SK1B (manufactured by Mitsubishi Chemical) and AMBERLITE IR124 (manufactured by Dow Chemical) can be used as the strongly acidic cation exchange resin used in the mixed bed ion exchange resin tower 16.
混床式イオン交換樹脂塔１６において用いられる強塩基性アニオン交換樹脂としては、例えば、ＡＭＢＥＲＬＩＴＥ ＩＲＡ４０２（ダウ・ケミカル製）等の市販品を用いることができる。 As the strongly basic anion exchange resin used in the mixed bed type ion exchange resin tower 16, for example, a commercially available product such as AMBERLITE IRA 402 (manufactured by Dow Chemical) can be used.
水質測定手段としては、処理水の水質を測定することができるものであればよく、特に制限はないが、例えば、処理水の電気伝導率を測定する電気伝導率計、比抵抗計、ｐＨ計等が挙げられる。 The water quality measuring means is not particularly limited as long as it can measure the quality of the treated water. For example, an electrical conductivity meter, a specific resistance meter, a pH meter for measuring the electrical conductivity of the treated water. Etc.
過酢酸含有排水処理装置１において、混床式イオン交換樹脂塔１６を再生する混床式イオン交換樹脂塔再生手段と、混床式イオン交換樹脂塔１６の再生排水を用いてアニオン交換樹脂塔１４を再生するアニオン交換樹脂塔再生手段と、を備え、混床式イオン交換樹脂塔１６の再生排水を用いてアニオン交換樹脂塔１４を再生することが好ましい。混床式イオン交換樹脂塔１６の再生排水をアニオン交換樹脂塔１４に充填した弱塩基性アニオン交換樹脂の再生に用いることで、苛性ソーダ等の再生剤の使用量を低減することができる。例えば、図１の処理水配管２６から混床式イオン交換樹脂塔１６、アニオン交換樹脂塔１４の順に再生水を通液すればよい。 In the peracetic acid-containing wastewater treatment apparatus 1, the mixed bed ion exchange resin tower regeneration means for regenerating the mixed bed ion exchange resin tower 16 and the anion exchange resin tower 14 using the regeneration wastewater of the mixed bed ion exchange resin tower 16. An anion exchange resin tower regeneration means for regenerating water, and the anion exchange resin tower 14 is preferably regenerated using the regeneration waste water of the mixed bed ion exchange resin tower 16. By using the regeneration waste water from the mixed bed type ion exchange resin tower 16 for the regeneration of the weakly basic anion exchange resin packed in the anion exchange resin tower 14, the amount of the regenerant such as caustic soda can be reduced. For example, the recycled water may be passed through the treated water pipe 26 in FIG. 1 in the order of the mixed bed ion exchange resin tower 16 and the anion exchange resin tower 14.
本実施形態に係る過酢酸含有排水の処理装置の他の例の概略構成を図２に示す。図２の過酢酸含有排水処理装置３では、並列に配置された２台の混床式イオン交換樹脂塔１６ａ，１６ｂを備え、アニオン交換処理水配管２４が途中で分岐して、それぞれが通水経路切り替え手段としてのバルブ３０ａ，３０ｂを介して混床式イオン交換樹脂塔１６ａ，１６ｂの入口に接続され、混床式イオン交換樹脂塔１６ａ，１６ｂの出口に接続されたそれぞれの処理水配管２６が合流し、処理水配管２６には水質測定手段として電気伝導率計２８が設置されている。 The schematic structure of the other example of the processing apparatus of the peracetic acid containing waste water which concerns on this embodiment is shown in FIG. The peracetic acid-containing wastewater treatment apparatus 3 of FIG. 2 includes two mixed-bed ion exchange resin towers 16a and 16b arranged in parallel, and the anion exchange treated water pipe 24 branches in the middle, each of which is water-permeable. Respective treated water pipes 26 connected to the inlets of the mixed bed type ion exchange resin towers 16a and 16b and connected to the outlets of the mixed bed type ion exchange resin towers 16a and 16b via valves 30a and 30b as path switching means. The electrical conductivity meter 28 is installed in the treated water pipe 26 as a water quality measuring means.
図２に示すように、過酢酸含有排水処理装置３において、混床式イオン交換樹脂塔１６を例えば並列に複数設置し（図２の例では、２台の混床式イオン交換樹脂塔１６ａ，１６ｂであるが、設置数には特に制限はない。）、複数の混床式イオン交換樹脂塔１６ａ，１６ｂの後段における電気伝導率計２８による水質測定結果に基づき、複数の混床式イオン交換樹脂塔１６ａ，１６ｂの通水経路を切り替えることが好ましい。例えば、図示しない制御手段により、電気伝導率計２８からの信号と、バルブ３０ａ，３０ｂの開閉とを連動させることで、複数列設置した混床式イオン交換樹脂塔１６ａ，１６ｂの通水ラインを切り替えればよい。 As shown in FIG. 2, in the peracetic acid-containing wastewater treatment apparatus 3, a plurality of mixed bed ion exchange resin towers 16 are installed in parallel, for example (in the example of FIG. 2, two mixed bed ion exchange resin towers 16a, 16b, but the number of installations is not particularly limited.) Based on the water quality measurement results by the electrical conductivity meter 28 at the subsequent stage of the plurality of mixed-bed ion exchange resin towers 16a and 16b, a plurality of mixed-bed ion exchanges It is preferable to switch the water flow path of the resin towers 16a and 16b. For example, by controlling the signal from the electric conductivity meter 28 and opening / closing of the valves 30a and 30b by a control means (not shown), the water flow lines of the mixed bed type ion exchange resin towers 16a and 16b installed in a plurality of rows are connected. Switch.
これにより、酢酸リークよりもカチオンリークを監視することができる。アニオンよりもカチオンが先にリークするように混床式イオン交換樹脂塔１６ａ，１６ｂの通水ラインを切り替えることで、水質基準基準を満たすように処理水の水質を監視することができる。 Thereby, cation leak can be monitored rather than acetic acid leak. By switching the water flow line of the mixed bed ion exchange resin towers 16a and 16b so that the cation leaks before the anion, the water quality of the treated water can be monitored so as to satisfy the water quality standard.
本実施形態において処理対象となる過酢酸含有排水としては、例えば、飲料製造工場、食品製造工場等から排出される過酢酸含有排水が挙げられる。飲料製造工場等におけるペットボトル等を製造する際に発生するオキソニアを含む洗浄排水を処理する場合に、好適に適用され、特に、オキソニアおよびカチオンを含む洗浄排水を処理する場合に、好適に適用される。 Examples of the peracetic acid-containing wastewater to be treated in the present embodiment include peracetic acid-containing wastewater discharged from beverage production factories, food production factories, and the like. This method is preferably applied when processing cleaning wastewater containing oxonia generated when manufacturing PET bottles and the like in beverage manufacturing plants, etc., particularly when processing cleaning wastewater containing oxonia and cations. The
過酢酸含有排水の過酢酸の濃度としては、例えば、１〜２０ｍｇ／Ｌ程度であり、酢酸の濃度としては、例えば、１〜２００ｍｇ／Ｌ程度である。カチオンを含む場合の過酢酸含有排水のカチオン濃度としては、例えば、硬度で１０〜１００ｍｇ ａｓ ＣａＣＯ３／Ｌ程度である。 The concentration of peracetic acid in the peracetic acid-containing wastewater is, for example, about 1 to 20 mg / L, and the concentration of acetic acid is, for example, about 1 to 200 mg / L. The cation concentration of the peracetic acid-containing wastewater containing cations is, for example, about 10 to 100 mg as CaCO 3 / L in hardness.
以下、実施例および比較例を挙げ、本発明をより具体的に詳細に説明するが、本発明は、以下の実施例に限定されるものではない。 Hereinafter, although an example and a comparative example are given and the present invention is explained more concretely in detail, the present invention is not limited to the following examples.
＜実施例１、比較例１，２＞
以下に示す比較実験を行った。実験フローを図３に示す。また、実験結果として、通水時間と、処理水の酢酸濃度およびカチオン濃度との関係を図４に示す。
<Example 1, Comparative Examples 1 and 2>
The comparative experiment shown below was conducted. The experimental flow is shown in FIG. Further, as an experimental result, FIG. 4 shows the relationship between the water passing time and the concentration of acetic acid and cation of treated water.
［共通実験条件］
（実験条件）
・原水：純水＋オキソニア（エコラボ社製、オキソニアアクティブ９０）
・オキソニア濃度：１，０００ｍｇ／Ｌ（酢酸：約１００ｍｇ／Ｌ、過酢酸：約１０ｍｇ／Ｌ、過酸化水素：約１００ｍｇ／Ｌ）
・原水流量：１０Ｌ／ｈ
・通水時間：７２ｈ連続通水
・原水カチオン濃度：Ｎａ＋Ｃａ＋Ｍｇ＝２０ｍｇ ａｓ ＣａＣＯ３／Ｌ
（装置）
・還元塔：触媒（オルガノ株式会社製、オルキャットＱＢ）
[Common experimental conditions]
(Experimental conditions)
・ Raw water: Pure water + Oxonia (Ecolab, 90)
Oxonia concentration: 1,000 mg / L (acetic acid: about 100 mg / L, peracetic acid: about 10 mg / L, hydrogen peroxide: about 100 mg / L)
・ Raw water flow rate: 10L / h
・ Water flow time: 72h continuous water flow ・ Raw water cation concentration: Na + Ca + Mg = 20 mg as CaCO 3 / L
(apparatus)
-Reduction tower: Catalyst (Orcat Co., Ltd. Orcat QB)
［比較実験条件］
（実施例１）
還元塔→弱塩基性アニオン樹脂→混床式（強酸性カチオン交換樹脂＋強塩基性アニオン交換樹脂）
・弱塩基性アニオン交換樹脂（ＡＭＢＥＲＬＩＴＥ ＩＲＡ６７）：０．５Ｌ
・混床式：強酸性カチオン交換樹脂（ＡＭＢＥＲＬＩＴＥ ＩＲ１２４）０．１Ｌ＋強塩基性アニオン交換樹脂（ＡＭＢＥＲＬＩＴＥ ＩＲＡ４０２）０．１Ｌ
・総樹脂量：０．７Ｌ
（比較例１）
還元塔→強酸性カチオン交換樹脂→弱塩基性アニオン交換樹脂
・強酸性カチオン交換樹脂（ＤＩＡＩＯＮ ＳＫ１Ｂ）：０．３Ｌ
・弱塩基性アニオン交換樹脂（ＤＩＡＩＯＮ ＷＡ２１）：０．７Ｌ
・総樹脂量：１．０Ｌ
（比較例２）
還元塔→弱塩基性アニオン交換樹脂→強酸性カチオン交換樹脂
・弱塩基性アニオン交換樹脂（ＤＩＡＩＯＮ ＷＡ２１）：０．７Ｌ
・強酸性カチオン交換樹脂（ＤＩＡＩＯＮ ＳＫ１Ｂ）：０．３Ｌ
・総樹脂量：１．０Ｌ
[Comparison experiment conditions]
Example 1
Reduction tower → Weak basic anion resin → Mixed bed type (strongly acidic cation exchange resin + strong basic anion exchange resin)
・ Weakly basic anion exchange resin (AMBERLITE IRA67): 0.5L
・ Mixed bed type: Strong acidic cation exchange resin (AMBERLITE IR124) 0.1L + strongly basic anion exchange resin (AMBERLITE IRA402) 0.1L
・ Total resin amount: 0.7L
(Comparative Example 1)
Reduction tower → strongly acidic cation exchange resin → weakly basic anion exchange resin / strongly acidic cation exchange resin (DIAION SK1B): 0.3 L
・ Weakly basic anion exchange resin (DIAION WA21): 0.7L
・ Total resin amount: 1.0L
(Comparative Example 2)
Reduction tower → weakly basic anion exchange resin → strongly acidic cation exchange resin / weakly basic anion exchange resin (DIAION WA21): 0.7 L
・ Strongly acidic cation exchange resin (DIAION SK1B): 0.3L
・ Total resin amount: 1.0L
処理水の酢酸濃度は、キャピラリ電気泳動法により測定した。処理水のカチオン濃度は、イオンクロマトグラフィにより測定した。 The acetic acid concentration of the treated water was measured by capillary electrophoresis. The cation concentration of the treated water was measured by ion chromatography.
図４に示すように、実施例１と比較例１の処理水の酢酸濃度は両者共に良好であったが、実施例１の方が総樹脂量は少なかった。実施例１と比較例２の処理水の酢酸濃度を比較すると、比較例２の方が高かった。実施例１と比較例１の処理水におけるカチオンまたは酢酸リークまでの、総樹脂量当たりの酢酸収量を計算すると、実施例１が１４ｇ／Ｌ−樹脂、比較例１が１１ｇ／Ｌ−樹脂となり、実施例１の方が少ない樹脂量で効率よく酢酸を除去することができることが確認できた。 As shown in FIG. 4, the acetic acid concentrations in the treated water of Example 1 and Comparative Example 1 were both good, but in Example 1, the total resin amount was smaller. When the acetic acid concentration of the treated water of Example 1 and Comparative Example 2 was compared, Comparative Example 2 was higher. When acetic acid yield per total resin amount up to the cation or acetic acid leak in the treated water of Example 1 and Comparative Example 1 was calculated, Example 1 was 14 g / L-resin, Comparative Example 1 was 11 g / L-resin, It was confirmed that Example 1 can efficiently remove acetic acid with a smaller amount of resin.
さらに、実施例１の場合、酢酸リークよりも先にカチオン（Ｎａ＋Ｃａ＋Ｍｇ）リークが生じていることを確認した。電気伝導率計などでカチオンリークを先に監視することで、酢酸リークが生じる前に的確なタイミングで再生を行うことができる。 Furthermore, in the case of Example 1, it was confirmed that a cation (Na + Ca + Mg) leak occurred before the acetic acid leak. By monitoring the cation leak first with an electric conductivity meter or the like, the regeneration can be performed at an accurate timing before the acetic acid leak occurs.
１，３ 過酢酸含有排水処理装置、１０ 原水槽、１２ 還元塔、１４ アニオン交換樹脂塔、１６，１６ａ，１６ｂ 混床式イオン交換樹脂塔、１８ ポンプ、２０ 原水配管、２２ 還元処理水配管、２４ アニオン交換処理水配管、２６ 処理水配管、２８ 電気伝導率計、３０ａ，３０ｂ バルブ。 1,3 Peracetic acid-containing wastewater treatment equipment, 10 raw water tank, 12 reduction tower, 14 anion exchange resin tower, 16, 16a, 16b mixed bed type ion exchange resin tower, 18 pump, 20 raw water pipe, 22 reduced treatment water pipe, 24 anion exchange treated water piping, 26 treated water piping, 28 electrical conductivity meter, 30a, 30b valve.
Claims (8)
前記還元処理された還元処理水をアニオン交換処理するための、弱塩基性アニオン交換樹脂を充填したアニオン交換樹脂塔と、
前記アニオン交換処理されたアニオン交換処理水をイオン交換処理するための、強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂とを充填した混床式イオン交換樹脂塔と、
前記混床式イオン交換樹脂塔の後段に設置した水質測定手段と、
を備え、
前記過酢酸含有排水は、酢酸、過酢酸および過酸化水素を含むオキソニア排水であり、
前記混床式イオン交換樹脂塔における強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂との充填比率が、カチオンブレークが先に起こるようにコントロールされることを特徴とする過酢酸含有排水の処理装置。 Reducing means for reducing peracetic acid-containing wastewater containing hardness components;
An anion exchange resin tower packed with a weakly basic anion exchange resin for anion exchange treatment of the reduced treated water,
Said for the anion exchange treated anion exchange treated water to ion exchange treatment, mixed bed ion exchange resin column filled with a fat-strongly acidic cation exchange resin and strongly basic anion exchange resin,
Water quality measuring means installed at the rear stage of the mixed bed ion exchange resin tower,
With
The peracetic acid-containing wastewater, Ri Okisonia wastewater der containing acetic acid, peracetic acid and hydrogen peroxide,
Filling ratio of the strongly acidic cation exchange resin and strongly basic anion exchange resin in the mixed-bed ion-exchange resin tower, processor peracetic acid-containing wastewater cation break characterized Rukoto is controlled to occur earlier .
前記混床式イオン交換樹脂塔における強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂との充填比率が１：１〜１：４であることを特徴とする過酢酸含有排水の処理装置。 The apparatus for treating peracetic acid-containing wastewater according to claim 1,
The mixed bed ion exchange packing ratio of the strongly acidic cation-exchange resin in the resin column with strongly basic anion-exchange resins is 1: 1 to 1: processor peracetic acid-containing wastewater, which is a 4.
前記混床式イオン交換樹脂塔を複数備え、
前記水質測定手段による測定結果に基づき、前記複数の混床式イオン交換樹脂塔の通水経路を切り替える通水経路切り替え手段をさらに備えることを特徴とする過酢酸含有排水の処理装置。 It is a processing apparatus of peracetic acid content drainage according to claim 1 or 2 ,
A plurality of the mixed bed type ion exchange resin towers,
A peracetic acid-containing wastewater treatment apparatus, further comprising a water flow path switching means for switching a water flow path of the plurality of mixed-bed ion exchange resin towers based on a measurement result by the water quality measurement means.
前記混床式イオン交換樹脂塔の樹脂を再生する混床式イオン交換樹脂塔再生手段と、
前記混床式イオン交換樹脂塔の再生排水を用いて前記アニオン交換樹脂塔の樹脂を再生するアニオン交換樹脂塔再生手段と、
を備えることを特徴とする過酢酸含有排水の処理装置。 It is a processing device of peracetic acid content drainage given in any 1 paragraph of Claims 1-3 ,
Mixed bed type ion exchange resin tower regeneration means for regenerating the resin of the mixed bed type ion exchange resin tower;
An anion exchange resin tower regeneration means for regenerating the resin of the anion exchange resin tower using the regeneration waste water of the mixed bed type ion exchange resin tower;
An apparatus for treating peracetic acid-containing wastewater.
前記還元処理された還元処理水を、弱塩基性アニオン交換樹脂を用いてアニオン交換処理するアニオン交換工程と、
前記アニオン交換処理されたアニオン交換処理水を、強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂との混床を用いてイオン交換処理する混床式イオン交換工程と、
前記混床式イオン交換工程の後段において水質測定を行う工程と、
を含み、
前記過酢酸含有排水は、酢酸、過酢酸および過酸化水素を含むオキソニア排水であり、
前記混床式イオン交換工程における強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂との充填比率を、カチオンブレークが先に起こるようにコントロールすることを特徴とする過酢酸含有排水の処理方法。 A reduction process for reducing peracetic acid-containing wastewater containing hardness components;
An anion exchange step in which the reduced treated water subjected to the reduction treatment is subjected to an anion exchange treatment using a weakly basic anion exchange resin;
The anion exchange treated anion exchange treated water, and mixed bed ion exchange process for ion-exchange treatment using a mixed bed of a strongly acidic cation exchange resin and strongly basic anion-exchange resins,
A step of measuring water quality in the latter stage of the mixed bed ion exchange step;
Including
The peracetic acid-containing wastewater, Ri Okisonia wastewater der containing acetic acid, peracetic acid and hydrogen peroxide,
Processing method of peracetic acid containing waste water the filling ratio of the strongly acidic cation exchange resin and strongly basic anion exchange resin in the mixed bed ion exchange process, a cation break and wherein the control to Rukoto to occur earlier.
前記混床式イオン交換工程における強酸性カチオン交換樹脂と強塩基性アニオン交換樹脂との充填比率が１：１〜１：４であることを特徴とする過酢酸含有排水の処理方法。 A method for treating peracetic acid-containing wastewater according to claim 5 ,
Filling ratio of the strongly acidic cation exchange resin and strongly basic anion-exchange resins in the mixed bed ion exchange step is 1: 1 to 1: processing method peracetic acid-containing wastewater, which is a 4.
前記混床式イオン交換工程において混床式イオン交換樹脂塔を複数用い、前記混床式イオン交換工程の後段における水質測定結果に基づき、前記複数の混床式イオン交換樹脂塔の通水経路を切り替えることを特徴とする過酢酸含有排水の処理方法。 A method for treating peracetic acid-containing wastewater according to claim 5 or 6 ,
A plurality of mixed bed ion exchange resin towers are used in the mixed bed ion exchange process, and water flow paths of the plurality of mixed bed ion exchange resin towers are determined based on the water quality measurement results in the latter stage of the mixed bed ion exchange process. A method for treating peracetic acid-containing wastewater, characterized by switching.
前記混床の再生排水を用いて前記弱塩基性アニオン交換樹脂を再生することを特徴とする過酢酸含有排水の処理方法。 A processing method of peracetic acid-containing wastewater according to any one of claims 5-7,
A method for treating peracetic acid-containing wastewater, wherein the weakly basic anion exchange resin is regenerated using the recycled wastewater from the mixed bed.
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