JP2017077522A - Water treatment system - Google Patents
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
本発明は、有機物質を含有する被処理水から有機物質を除去することで当該被処理水を清浄化する水処理システムに関する。特に、各種工場や研究施設等から排出される産業排水、最終処分場から排出される浸出水、地下水、および上水等の水から難分解性有機物質を効率的に除去することで当該被処理水を清浄化する水処理システムに関する。 The present invention relates to a water treatment system that purifies the water to be treated by removing the organic substance from the water to be treated containing the organic substance. In particular, it effectively removes persistent organic substances from industrial wastewater discharged from various factories and research facilities, leachate, groundwater, and tap water discharged from final disposal sites. The present invention relates to a water treatment system for purifying water.
従来、有害有機物質を水から除去して浄化する装置としては、破砕炭、粒状炭、粉末炭などの吸着材を用いた交換式吸着装置が広く用いられている。交換式吸着装置は、吸着材を充填した槽に有機物質を含有した水を通流させ、吸着材により水中の有機物質を効率的に除去することができるシンプルな処理装置である。 Conventionally, as an apparatus for removing and purifying harmful organic substances from water, an exchangeable adsorption apparatus using an adsorbent such as crushed coal, granular coal, and powdered coal has been widely used. The exchangeable adsorption apparatus is a simple processing apparatus that allows water containing an organic substance to flow through a tank filled with an adsorbent and efficiently removes the organic substance in the water using the adsorbent.
この様な交換式吸着装置は、被処理水を活性汚泥装置、膜分離式活性汚泥装置(MBR)、凝縮沈殿装置、蒸発濃縮装置、イオン交換装置、膜分離装置、曝気装置、促進酸化分解装置(AOP)、フェントン反応装置などの水処理装置の後段に接続され、これらの水処理装置で処理されなかった難分解性有機物を最終的に除去するバックアップ装置として、様々な水処理システムに設置されており、広く普及している。 Such an exchange-type adsorption device is an activated sludge device, a membrane-separated activated sludge device (MBR), a condensation-precipitation device, an evaporative concentration device, an ion-exchange device, a membrane separation device, an aeration device, an accelerated oxidative decomposition device. (AOP), connected to the latter stage of water treatment equipment such as Fenton reactors, and installed in various water treatment systems as a backup device to finally remove the hardly decomposable organic substances that have not been treated by these water treatment equipment. It is widely used.
ここで言う難分解性有機物質とは、ポリ塩化ジベンゾパラジオキシン(PCDD)、ポリ塩化ジベンゾフラン(PCDF)、ダイオキシン様ポリ塩化ビフェニル(DL−PCB)などのダイオキシン類、テトラサイクリン、オセルタミビル、リン酸オセルタミビル、ベザフィブラート、トリクロサンなどの抗生物質、ベザフィブラート、フェノフィブラートなどの抗脂血症剤成分、ジクロフェナク、サリチル酸、アセトアミノフェンなどの解熱鎮痛剤成分、カルバマゼピンなどの抗てんかん剤成分、フミン酸、フルボ酸などのフミン物質、ヘキサメチレンテトラミンなどを指す。これらの難分解性有機物質は低濃度においても生態系の影響や人体への残留性などの問題があるため、高度処理が求められている。 The hardly decomposable organic substance referred to here is dioxins such as polychlorinated dibenzoparadioxin (PCDD), polychlorinated dibenzofuran (PCDF), dioxin-like polychlorinated biphenyl (DL-PCB), tetracycline, oseltamivir, oseltamivir phosphate, Antibiotic components such as bezafibrate and triclosan, antilipidemic components such as bezafibrate and fenofibrate, antipyretic analgesic components such as diclofenac, salicylic acid and acetaminophen, antiepileptic components such as carbamazepine, humic acid and fulvic acid It refers to humic substances such as hexamethylenetetramine. Since these persistent organic substances have problems such as the influence of the ecosystem and persistence on the human body even at low concentrations, advanced treatment is required.
しかしながら、交換式吸着装置は、有機物質を一定時間吸着し続け吸着材の吸着能力が飽和に達すれば、新品への交換、もしくは一度装置から吸着材を取り出して再生が必要となる。よって、連続浄化ができず、交換の労力、コスト増大が問題であった。 However, the exchangeable adsorbing device needs to be replaced with a new one or once the adsorbing material is taken out from the device and regenerated if the adsorbing capacity of the adsorbing material reaches saturation when the organic substance is continuously adsorbed for a certain period of time. Therefore, continuous purification cannot be performed, and replacement labor and cost increase are problems.
一方、吸着材を用いて吸着による有機物質の除去(吸着工程)と吸着材の再生(脱着工程)とを交互に行うことで、高効率で安定的に除去できる吸脱着式排水処理装置が検討されている(例えば、特許文献1)。この排水処理装置は、水の連続浄化を実現し、基本的には吸着材の交換が必要なく、有機物質を高効率で安定的に除去することができる。 On the other hand, an adsorption / desorption-type wastewater treatment device that can remove the organic substance by adsorption (adsorption process) and regeneration of the adsorbent (desorption process) alternately by using an adsorbent is considered. (For example, Patent Document 1). This wastewater treatment apparatus realizes continuous purification of water, basically does not require replacement of the adsorbent, and can stably remove organic substances with high efficiency.
吸着材として活性炭素繊維を使用した場合、活性炭素繊維は吸着速度が速いので、少ない吸着材量で高効率に有機物質を除去できることが知られている。前記水吸脱着式排水処理装置において、吸着除去された有機物質は、吸着材の再生時に脱着媒体により吸着材から脱離され、有機物質を含んだガス(脱着ガス)として排出される。ここで、脱着媒体に水蒸気を使用した場合、脱着ガスを液化凝縮することで、有機物質を高濃度に含有した濃縮水として回収できる。そのため、この場合、吸脱着式排水処理装置は、濃縮装置としての機能も保持する。 When activated carbon fibers are used as the adsorbent, it is known that activated carbon fibers can remove organic substances with high efficiency with a small amount of adsorbent because the adsorption speed of the activated carbon fibers is fast. In the water adsorption / desorption type wastewater treatment apparatus, the adsorbed and removed organic substance is desorbed from the adsorbent by the desorption medium when the adsorbent is regenerated, and is discharged as a gas containing the organic substance (desorption gas). Here, when water vapor is used as the desorption medium, the desorption gas can be recovered as concentrated water containing the organic substance at a high concentration by liquefying and condensing the desorption gas. Therefore, in this case, the adsorption / desorption type waste water treatment device also retains a function as a concentration device.
そこで、本発明者らは、吸脱着式排水処理装置のこのような濃縮機能を利用して、吸脱着式排水処理装置を交換式吸着装置のバックアップ装置として付帯することで、交換式吸着装置を備えたシステムにおける交換式吸着装置の交換頻度を抑える特許を出願済みである(特許文献2)。 Therefore, the present inventors utilize such a concentration function of the adsorption / desorption type wastewater treatment device, and attach the adsorption / desorption type wastewater treatment device as a backup device of the exchangeable adsorption device, thereby providing the exchangeable adsorption device. A patent for reducing the replacement frequency of the exchangeable adsorption device in the system provided has been filed (Patent Document 2).
しかしながら、上述のような低濃度の有機物質をより低減しなければならない水処理において、交換式吸着装置に充填する吸着材の吸着性能をより十分に活用するための改善の余地がある。 However, there is room for improvement in order to fully utilize the adsorption performance of the adsorbent filled in the exchangeable adsorption apparatus in the water treatment in which the low-concentration organic substance must be further reduced.
特に交換式吸着装置の有機物質の除去原理は、ファンデルワールス力などに依存した物理吸着であり、図1に示すように被処理水中の有機物質濃度依存性があるため、難分解性有機物質濃度が低くなるほど除去効率は低くなる。このような問題を解決するためには、多量の吸着材を用いることも考えられるが、装置の大型化や設置コストの増大が不可避であり、必ずしも有効な対策とはなり得ない。 In particular, the organic substance removal principle of the exchangeable adsorption apparatus is physical adsorption depending on van der Waals force and the like, and as shown in FIG. The lower the concentration, the lower the removal efficiency. In order to solve such a problem, it is conceivable to use a large amount of adsorbent, but an increase in the size of the apparatus and an increase in installation cost are inevitable, and cannot necessarily be an effective measure.
そこで、本発明は、上記技術の課題に鑑みなされたものであり、水中の有機物質を高効率に処理できると共に、交換式吸着装置に充填された吸着材の充填量と交換コストを低減させる水処理システムを提供することを目的とするものである。 Therefore, the present invention has been made in view of the above-described problems of the technology, and is capable of treating organic substances in water with high efficiency and reducing the filling amount and replacement cost of the adsorbent filled in the exchangeable adsorption device. The object is to provide a processing system.
本発明者らは、上記課題を解決するため、鋭意検討した結果、ついに本発明を完成するに到った。即ち本発明は、以下の通りである。
(1)有機物質を吸着する吸着素子を交換可能に備えた交換式吸着装置を有する水処理システムであって、
有機物質を吸脱着する吸脱着素子を備え、被処理水から有機物質を前記吸脱着素子により吸着して第一処理水を排出し、前記吸脱着素子に吸着した有機物質を水蒸気により脱着し、脱着した有機物を含有する水蒸気を液化凝縮して濃縮水とする濃縮装置を有し、
前記交換式吸着装置は、前記濃縮装置から排出された前記濃縮水に含有された前記有機物質を前記吸着素子により吸着して第二処理水を排出し、当該第二処理水を前記被処理水の少なくとも一部として前記濃縮装置に導入する、ことを特徴とする水処理システム。
(2)前記濃縮装置は、前記吸脱着素子に付着した水を除去してこれを除去水として排出し、当該除去水を前記被処理水の少なくとも一部として自装置に再度供給することを特徴とする(1)に記載の水処理システム。
(3)前記濃縮装置は、前記吸脱着素子に付着した水の除去に水蒸気を使用することを特徴とする(2)に記載の水処理システム。
(4)前記吸脱着素子が、活性炭素繊維を含んでいることを特徴とする(1)から(3)に記載の水処理システム。
(5)前記活性炭素繊維は、比表面積が1600m2/g以上、平均細孔径が16Å以上であることを特徴とする(4)に記載の水処理システム。
(6)前記吸着素子が、活性炭素繊維、活性炭、ゼオライト、および活性アルミナの少なくとも1つを含んでいることを特徴とする(1)から(5)に記載の水処理システム。
(7)前記濃縮水の有機物質濃度が、前記被処理水の10倍以上であることを特徴とする(1)から(6)記載の水処理システム。
(8)前記有機物質が、難分解性有機物質であることを特徴とする(1)から(7)に記載の水処理システム。
(9)前記被処理水中の有機物質濃度が、0.5mg/L以下であることを特徴とする(1)から(8)に記載の水処理システム。
As a result of intensive studies in order to solve the above problems, the present inventors have finally completed the present invention. That is, the present invention is as follows.
(1) A water treatment system having a replaceable adsorption device equipped with a replaceable adsorption element for adsorbing an organic substance,
An adsorption / desorption element for adsorbing and desorbing an organic substance is provided, the organic substance is adsorbed from the water to be treated by the adsorption / desorption element to discharge the first treated water, and the organic substance adsorbed on the adsorption / desorption element is desorbed by water vapor, It has a concentrating device that liquefies and condenses water vapor containing the desorbed organic matter into concentrated water,
The exchangeable adsorption device adsorbs the organic substance contained in the concentrated water discharged from the concentration device by the adsorption element to discharge second treated water, and the second treated water is treated with the treated water. A water treatment system which is introduced into the concentrator as at least a part of the water treatment system.
(2) The concentrator removes water adhering to the adsorption / desorption element, discharges it as removed water, and supplies the removed water to the apparatus again as at least part of the treated water. The water treatment system according to (1).
(3) The water treatment system according to (2), wherein the concentration device uses water vapor to remove water adhering to the adsorption / desorption element.
(4) The water treatment system according to any one of (1) to (3), wherein the adsorption / desorption element includes activated carbon fiber.
(5) The water treatment system according to (4), wherein the activated carbon fiber has a specific surface area of 1600 m 2 / g or more and an average pore diameter of 16 mm or more.
(6) The water treatment system according to any one of (1) to (5), wherein the adsorption element includes at least one of activated carbon fiber, activated carbon, zeolite, and activated alumina.
(7) The water treatment system according to any one of (1) to (6), wherein an organic substance concentration of the concentrated water is 10 times or more of the treated water.
(8) The water treatment system according to (1) to (7), wherein the organic substance is a hardly decomposable organic substance.
(9) The water treatment system according to any one of (1) to (8), wherein an organic substance concentration in the water to be treated is 0.5 mg / L or less.
本発明の水処理システムによると、吸脱着素子を備えた濃縮装置を備え、濃縮装置にて被処理水の有機物質を吸着および脱着後の濃縮水を交換式吸着装置に導入する。さらに、交換式吸着装置にて有機物質を吸着した後の第二処理水を濃縮装置に戻す。よって、濃縮装置にて被処理水中の有機物質を高効率に除去するとともに、被処理水量を減容化し、有機物濃度を濃縮することで、交換式吸着装置の吸着効率を高めることができる。そのため、交換式吸着装置の吸着材の交換頻度を抑え、小型化できる利点がある。 According to the water treatment system of the present invention, a concentration device including an adsorption / desorption element is provided, and the concentrated water after adsorbing and desorbing the organic substance of the water to be treated is introduced into the exchangeable adsorption device. Further, the second treated water after the organic substance is adsorbed by the exchangeable adsorber is returned to the concentrator. Therefore, it is possible to increase the adsorption efficiency of the exchangeable adsorption device by removing the organic substance in the treated water with high efficiency by the concentrating device, reducing the amount of the treated water, and concentrating the organic substance concentration. Therefore, there is an advantage that the frequency of replacement of the adsorbent of the exchangeable adsorption device can be suppressed and the size can be reduced.
以上からわかるように、本発明により、被処理水中の有機物質を高効率に処理できると共に、交換式吸着装置に充填された吸着材の充填量と交換コストを低減させる水処理システムを提供することができる。 As can be seen from the above, according to the present invention, it is possible to provide a water treatment system capable of treating an organic substance in water to be treated with high efficiency and reducing the filling amount and replacement cost of an adsorbent filled in an exchangeable adsorption device. Can do.
以下、本発明の実施の形態について、図を参照して詳細に説明する。なお、以下に示す実施の形態においては、同一のまたは共通する構成、部分、材料等について図中同一の符号とし、その説明は繰り返さない。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, the same or common configurations, parts, materials, and the like are denoted by the same reference numerals in the drawings, and description thereof will not be repeated.
図2は、本発明の実施の形態における水処理システム10の構成図である。図2に示すように、本実施の形態における水処理システム10は、濃縮装置100と、交換式吸着装置200とを主として備えている。 FIG. 2 is a configuration diagram of the water treatment system 10 according to the embodiment of the present invention. As shown in FIG. 2, the water treatment system 10 in the present embodiment mainly includes a concentrating device 100 and a replaceable adsorption device 200.
濃縮装置100は、吸脱着素子としての吸着材111、121がそれぞれ収容された第1処理槽110および第2処理槽120を有している。吸着材111、121は、被処理水を接触させることで被処理水に含有される有機物質を吸着する。従って、濃縮装置100においては、吸着材111、121に被処理水を供給することで有機物質が吸着材111、121によって吸着され、これにより被処理水が清浄化されて処理水として排出される。 The concentrating device 100 includes a first processing tank 110 and a second processing tank 120 in which adsorbents 111 and 121 serving as adsorption / desorption elements are accommodated, respectively. The adsorbents 111 and 121 adsorb organic substances contained in the water to be treated by contacting the water to be treated. Therefore, in the concentration apparatus 100, by supplying the water to be treated to the adsorbents 111 and 121, the organic substance is adsorbed by the adsorbents 111 and 121, whereby the water to be treated is cleaned and discharged as treated water. .
吸着材111、121は、供給される被処理水よりも少ない量の水蒸気を接触させることで吸着した有機物質を脱着する。第1処理槽110および第2処理槽120から排出された水蒸気と脱着された有機物質とは、凝縮器130によって冷却凝縮されて、濃縮水として濃縮装置100外へ排出される。 The adsorbents 111 and 121 desorb the adsorbed organic substance by bringing a smaller amount of water vapor into contact with the treated water to be supplied. The water vapor discharged from the first treatment tank 110 and the second treatment tank 120 and the desorbed organic substance are cooled and condensed by the condenser 130 and are discharged out of the concentration apparatus 100 as concentrated water.
第1処理槽110および第2処理槽120には、被処理水(原水)の供給ライン、第一処理水の排出ライン、水蒸気の供給ライン、および濃縮水の排出ラインの各配管が接続されている。各ラインにはバルブ等を用いて各処理槽に対して接続/非接続状態に切替えられる流路切替手段が接続された構成となっている。第1処理槽110と第2処理槽120とは、流路切替手段を操作することによって、交互に吸着槽および脱着槽として機能する。第1処理槽110が吸着槽として機能している際には、第2処理槽120は脱着槽として機能する。具体的には、被処理水が第1処理槽110へ供給され、第一処理水が第1処理槽110から排出されるように流路が確保される際には、第2処理槽120には水蒸気が供給され、濃縮水が第2処理槽120から排出される流路構成となる。本実施の形態の濃縮装置100においては、吸着槽と脱着槽とが経時的に交互に切り替わるように構成されている。 Connected to the first treatment tank 110 and the second treatment tank 120 are pipes for a treated water (raw water) supply line, a first treated water discharge line, a steam supply line, and a concentrated water discharge line. Yes. Each line has a configuration in which a flow path switching means that is switched to a connected / disconnected state is connected to each processing tank using a valve or the like. The first treatment tank 110 and the second treatment tank 120 alternately function as an adsorption tank and a desorption tank by operating the flow path switching means. When the first processing tank 110 functions as an adsorption tank, the second processing tank 120 functions as a desorption tank. Specifically, when the flow path is secured so that the water to be treated is supplied to the first treatment tank 110 and the first treatment water is discharged from the first treatment tank 110, the second treatment tank 120 Has a flow path configuration in which steam is supplied and concentrated water is discharged from the second treatment tank 120. Concentration apparatus 100 of the present embodiment is configured such that the adsorption tank and the desorption tank are alternately switched over time.
濃縮装置100は、吸着槽から脱着槽に切替わった際に、吸着材111、121に付着する水分を除去(脱水)して除去水として排出してから、水蒸気供給による脱着を開始する装置であると好ましい。吸着材111、121の付着水を事前に除去してから水蒸気脱着を行う方が事前に除去しない場合よりも、濃縮水量を減容化でき濃縮倍率を高めることができるからである。 The concentration device 100 is a device that starts desorption by supplying water vapor after removing (dehydrating) water adhering to the adsorbents 111 and 121 and discharging it as removed water when switching from the adsorption tank to the desorption tank. Preferably there is. This is because the amount of concentrated water can be reduced and the concentration ratio can be increased when the water adsorbed on the adsorbents 111 and 121 is removed in advance and then steam desorption is not performed in advance.
付着水の除去手段は、自重抜き、圧縮空気・窒素・水蒸気などの高圧ガスでの高速パージ、真空ポンプなどを用いた吸引などの手段が使用できるが、水蒸気による高速パージが好ましい。水蒸気による高速パージとすることで、付着水の除去手段を別途付帯する必要がなく、高効率に付着水を除去でき、加えて吸着槽が加温されるため、濃縮倍率および脱着効率が高まるからである。なお、脱水に使用した水蒸気は付着水と接触した際に液化凝縮され、除去水の一部となる。 As the means for removing adhering water, means such as self-weight removal, high-speed purge with a high-pressure gas such as compressed air, nitrogen, and water vapor, and suction using a vacuum pump can be used, but high-speed purge with water vapor is preferred. By using high-speed purging with water vapor, there is no need to add a separate means for removing adhering water, and adhering water can be removed with high efficiency. In addition, the adsorption tank is heated, so the concentration factor and desorption efficiency increase. It is. The water vapor used for dehydration is liquefied and condensed when it comes into contact with the adhering water and becomes part of the removed water.
また、水処理システム10では、除去水は濃縮装置100に再度供給されるように構成されるのが好ましい。除去水を他の水処理装置で別途処理する必要がなくなるからである。ここで、図3に、水処理システム10の変形例である、除去水を濃縮装置100に再度供給する水処理システム10Aの構成を示す。水処理システム10Aは、除去水を濃縮装置100に再度供給する構成以外は水処理システム10と同様である。そのため、水処理システム10Aの説明は省略する。水処理システム10Aでは、除去水を再度供給する流れと、濃縮水を濃縮器130へ流す流れとの切り替えは、例えばバルブ等の切り替え手段で行う。 Further, the water treatment system 10 is preferably configured so that the removed water is supplied to the concentrator 100 again. This is because it is not necessary to separately process the removed water with another water treatment apparatus. Here, FIG. 3 shows a configuration of a water treatment system 10 </ b> A that is a modified example of the water treatment system 10 and supplies the removed water to the concentrator 100 again. The water treatment system 10A is the same as the water treatment system 10 except that the removed water is supplied again to the concentrator 100. Therefore, description of the water treatment system 10A is omitted. In the water treatment system 10A, switching between the flow of supplying the removed water again and the flow of flowing the concentrated water to the concentrator 130 is performed by switching means such as a valve.
図2に戻り、吸着材111、121は、活性炭、活性炭素繊維またはゼオライトなどを利用できるが、活性炭素繊維を利用することがより好ましい。活性炭素繊維は、表面にミクロ孔を有する繊維状構造を有しているため、水との接触効率が高く、特に水中の有機物質の吸着速度が速くなり、他の吸着材に比べて極めて高い吸着効率を実現できる材料である。 Returning to FIG. 2, the adsorbents 111 and 121 can use activated carbon, activated carbon fiber, zeolite, or the like, but it is more preferable to use activated carbon fiber. Since the activated carbon fiber has a fibrous structure with micropores on the surface, the contact efficiency with water is high, and the adsorption rate of organic substances in water is particularly high, which is extremely high compared to other adsorbents. It is a material that can achieve adsorption efficiency.
吸着材111、121として利用可能な活性炭素繊維の物性や原材料は、特に限定しない。除去対象である有機物質に応じて適宜選定すればよい。水処理システム10が処理する有機物質は以下で説明するように難分解性有機物質であり、難分解性有機物質には比較的分子サイズが大きく、高比表面積、細孔径の大きな活性炭素繊維が適している。そのため、吸着材111、121として利用可能な活性炭素繊維は、例えば、比表面積が1600m2/g以上、平均細孔径が16Å以上であるのが好ましい。 The physical properties and raw materials of the activated carbon fiber that can be used as the adsorbents 111 and 121 are not particularly limited. What is necessary is just to select suitably according to the organic substance which is a removal object. The organic material that the water treatment system 10 treats is a hardly decomposable organic material as described below, and the hardly decomposable organic material has activated carbon fibers having a relatively large molecular size, high specific surface area, and large pore diameter. Is suitable. Therefore, the activated carbon fiber that can be used as the adsorbents 111 and 121 preferably has, for example, a specific surface area of 1600 m 2 / g or more and an average pore diameter of 16 mm or more.
濃縮装置100の脱着媒体である水蒸気の蒸気圧、温度等は特に限定しないが、使用する吸着材111、121の耐熱温度や脱着する有機物質の物性などに応じて適宜設定すればよい。ただし、濃縮装置100に供給する被処理水の質量よりも少ない質量の水蒸気により脱着することが必要である。水蒸気の質量の方が多い場合、有機物質が濃縮されず、被処理水中の有機物質濃度よりも高濃度の有機物質を含有する濃縮水が得られない。濃縮装置100では、例えば、被処理水の10倍以上に濃縮されることが好ましい。10倍以上に濃縮すると、図1に示す通り、有機物質濃度に応じて吸着容量が上昇し、後述の交換式吸着装置200の吸着材の吸着性能を十分活用することが可能となるからである。ここで、被処理水の1/10以下の水蒸気量で脱着することにより、10倍以上に濃縮することができる。 The vapor pressure, temperature, and the like of water vapor that is a desorption medium of the concentrator 100 are not particularly limited, but may be set as appropriate according to the heat resistance temperature of the adsorbents 111 and 121 to be used and the physical properties of the organic substance to be desorbed. However, it is necessary to desorb with water vapor having a mass smaller than the mass of the water to be treated supplied to the concentrator 100. When the mass of water vapor is larger, the organic substance is not concentrated, and concentrated water containing an organic substance having a higher concentration than the organic substance concentration in the water to be treated cannot be obtained. In the concentrator 100, for example, it is preferable that the water to be treated is concentrated 10 times or more. When concentrated 10 times or more, as shown in FIG. 1, the adsorption capacity increases according to the organic substance concentration, and the adsorption performance of the adsorbent of the exchangeable adsorption device 200 described later can be fully utilized. . Here, it can concentrate 10 times or more by desorbing with the water vapor amount of 1/10 or less of to-be-processed water.
本発明の実施の形態では、濃縮装置100は二つの吸着材111、112および処理槽110、120を使用するものとして説明したが、3つ以上の処理槽を用いた構成でもよい。また、1つの吸着材および処理槽を用いた構成でもよい。例えば、1つの吸着材および処理槽を使用した場合、処理槽が脱着槽として機能している場合には、被処理水を一時的に貯水し、脱着工程が完了後、吸着槽として機能するよう切り替えサイクルをおこなってもよい。 In the embodiment of the present invention, the concentration apparatus 100 has been described as using the two adsorbents 111 and 112 and the processing tanks 110 and 120. However, a configuration using three or more processing tanks may be used. Moreover, the structure using one adsorbent and a processing tank may be sufficient. For example, when one adsorbent and a treatment tank are used, if the treatment tank functions as a desorption tank, the treated water is temporarily stored, and after the desorption process is completed, it functions as an adsorption tank. A switching cycle may be performed.
交換式吸着装置200は、吸着材211が収納された処理槽220を有している。上述の通り、処理槽220へ濃縮水を通流させ、吸着材211により水中の有機物質を吸着して第二処理水を排出することによって、水を清浄化する装置である。吸着材211の吸着容量が飽和に達すると水中の有機物質の浄化能はなくなるので、新品に交換するか、取り出して再生させて再充填させることで、浄化能を維持することができる。 The exchangeable adsorption device 200 has a treatment tank 220 in which an adsorbent 211 is accommodated. As described above, it is a device that purifies water by allowing concentrated water to flow into the treatment tank 220, adsorbing organic substances in the water by the adsorbent 211, and discharging the second treated water. When the adsorption capacity of the adsorbent 211 reaches saturation, the ability to purify organic substances in water is lost. Therefore, the ability to purify can be maintained by replacing with a new one, or by taking out and regenerating and refilling.
交換式吸着装置200には、濃縮装置100から排出された濃縮水が供給される。図1の通り、水中の有機物質濃度が高い方が、吸着容量が大きくなるので、吸着材211の交換もしくは再生頻度が少なくしたり、吸着材211の充填量を減らしたりすることができる。 Concentrated water discharged from the concentration device 100 is supplied to the exchangeable adsorption device 200. As shown in FIG. 1, the higher the organic substance concentration in the water, the larger the adsorption capacity. Therefore, the frequency of replacement or regeneration of the adsorbent 211 can be reduced, and the amount of the adsorbent 211 filled can be reduced.
また、交換式吸着装置200から排出される第二処理水は被処理水と混合され、濃縮装置200で再処理される構成が好ましい。このような構成とせず、第二処理水を第一処理水の有機物質濃度以下まで除去して、第一処理水と混合して放流することを想定すると、吸着材211の交換頻度や充填量を増やさなければならず、本発明の効果が得られないからである。従って、第二処理水は、濃縮装置100の除去性能に影響の出ない程度に有機物が除去されたもの(例えば、被処理水の有機物質濃度程度まで除去されたもの)であればよい。 Moreover, the 2nd treated water discharged | emitted from the exchangeable adsorption apparatus 200 is mixed with to-be-processed water, and the structure reprocessed with the concentration apparatus 200 is preferable. Assuming that the second treated water is removed to a concentration equal to or lower than the organic substance concentration of the first treated water without being configured as described above, and mixed and discharged with the first treated water, the replacement frequency and filling amount of the adsorbent 211 are assumed. This is because the effect of the present invention cannot be obtained. Therefore, the second treated water may be any water from which organic substances have been removed to such an extent that the removal performance of the concentrating device 100 is not affected (for example, to which the concentration of organic substances in the water to be treated has been removed).
吸着材211は、活性炭素繊維、活性炭、ゼオライト、活性アルミナなどを利用できるが、除去対象の有機物質によって適宜選定すればよい。形状も繊維状、粒状、粉末などがあるが、特に限定されない。 The adsorbent 211 may be activated carbon fiber, activated carbon, zeolite, activated alumina, or the like, but may be appropriately selected depending on the organic substance to be removed. The shape includes fibrous, granular and powder, but is not particularly limited.
以上の本実施の形態の水処理システム10,10Aにより、濃縮装置100は、被処理水から高効率に有機物質を除去するとともに、被処理水中の有機物質濃度を濃縮して、交換式吸着装置200の吸着材211の吸着容量を有効に活用する装置として機能する。よって、本発明によると、交換式吸着装置200の大型化や吸着材の交換頻度が増大することを防止しつつ、高効率で安定的に水処理することが可能な水処理システムを提供することができる。また、交換式吸着装置200は、濃縮装置100の二次処理装置として機能するので、濃縮装置100の後処理装置が不要となる利点もある。 By the water treatment systems 10 and 10A of the present embodiment as described above, the concentrator 100 removes organic substances from the water to be treated with high efficiency and concentrates the organic substance concentration in the water to be treated, thereby exchanging the adsorption apparatus. It functions as an apparatus that effectively uses the adsorption capacity of 200 adsorbents 211. Therefore, according to the present invention, it is possible to provide a water treatment system that can stably and efficiently perform water treatment while preventing an increase in the size of the replaceable adsorption device 200 and an increase in the frequency of replacement of the adsorbent. Can do. Moreover, since the exchangeable adsorption device 200 functions as a secondary processing device of the concentrating device 100, there is an advantage that a post-processing device of the concentrating device 100 becomes unnecessary.
以上において図2で説明した本発明の実施の形態の特徴的な各構成は、相互に組み合わせることが可能である。 The characteristic configurations of the embodiment of the present invention described above with reference to FIG. 2 can be combined with each other.
また、以上において説明した本発明の実施の形態においては、ポンプやファン等の流体搬送手段やストレージタンク等の流体貯留手段などの構成要素を特に示すことなく説明を行なったが、これら構成要素は必要に応じて適宜の位置に配置すればよい。 Further, in the embodiments of the present invention described above, the description has been made without particularly showing the constituent elements such as the fluid conveying means such as the pump and the fan and the fluid storing means such as the storage tank. What is necessary is just to arrange | position to an appropriate position as needed.
本実施形態の水処理システム10で処理する被処理水中の有機物質は、難分解性有機物質とする。すなわち、ポリ塩化ジベンゾパラジオキシン(PCDD)、ポリ塩化ジベンゾフラン(PCDF)、ダイオキシン様ポリ塩化ビフェニル(DL−PCB)などのダイオキシン類、テトラサイクリン、オセルタミビル、リン酸オセルタミビル、ベザフィブラート、トリクロサンなどの抗生物質、ベザフィブラート、フェノフィブラートなどの抗脂血症剤成分、ジクロフェナク、サリチル酸、アセトアミノフェンなどの解熱鎮痛剤成分、カルバマゼピンなどの抗てんかん剤成分、フミン酸、フルボ酸などのフミン物質、ヘキサメチレンテトラミンなどである。上述の通り、従来の交換式吸着装置は様々な水処理装置にて処理されなかった有機物質を最終的に除去するバックアップを目的とした装置であり、上記の有機物質が処理対象として該当する。 The organic substance in the for-treatment water to be treated by the water treatment system 10 of the present embodiment is a hardly decomposable organic substance. That is, dioxins such as polychlorinated dibenzoparadoxine (PCDD), polychlorinated dibenzofuran (PCDF), dioxin-like polychlorinated biphenyl (DL-PCB), tetracycline, oseltamivir, oseltamivir phosphate, bezafibrate, triclosan and other antibiotics, bezafibrate , Antilipidemic components such as fenofibrate, antipyretic analgesic components such as diclofenac, salicylic acid and acetaminophen, antiepileptic components such as carbamazepine, humic substances such as humic acid and fulvic acid, hexamethylenetetramine, etc. . As described above, the conventional exchangeable adsorption device is a device for the purpose of finally removing an organic material that has not been processed by various water treatment devices, and the organic material corresponds to a processing target.
本実施形態の水処理システム10で処理する被処理水中の有機物質濃度は、0.5mg/L以下とする。上述の通り、従来の交換式吸着装置の設置目的からして、除去すべき有機物質はある程度低減されていることが想定できるからである。本実施形態の水処理システム10では、低濃度の有機物質を含む被処理水を濃縮装置100で濃縮することによって、交換式吸着装置200の処理能を最大限に活かす効果が得られるのであって、有機物質の濃度が高いとこの効果が得られなくなるからである。 The organic substance density | concentration in the to-be-processed water processed with the water treatment system 10 of this embodiment shall be 0.5 mg / L or less. This is because, as described above, for the purpose of installing the conventional exchangeable adsorption apparatus, it can be assumed that the organic substances to be removed are reduced to some extent. In the water treatment system 10 of this embodiment, the effect of maximizing the treatment capability of the exchangeable adsorption device 200 can be obtained by concentrating the water to be treated containing a low concentration organic substance with the concentration device 100. This is because this effect cannot be obtained if the concentration of the organic substance is high.
なお、今回開示した上記各実施の形態は、すべての点で例示であって、制限的なものではない。本発明の技術的範囲は、特許請求の範囲によって画定され、また特許請求の範囲の記載と均等の意味および範囲内でのすべての変更を含むものである。 The above-described embodiments disclosed herein are illustrative in all respects and are not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
上記説明した水処理システム10Aを用いた有機溶剤の回収を実施した。評価は下記の方法により行った。
(BET比表面積)
BET比表面積は、液体窒素の沸点(−195.8℃)雰囲気下、相対圧力0.0〜0.15の範囲で上昇させたときの試料への窒素吸着量を数点測定し、BETプロットにより試料単位質量あたりの表面積(m2/g)を求めた。
(細孔容積)
細孔容積は、相対圧0.95における窒素ガスの気体吸着法により測定した。
(平均細孔径)
平均細孔径は、以下の式で求めた。
dp=40000Vp/S(ただし、dp:平均細孔径(Å))
Vp:細孔容積(cc/g)
S:BET比表面積(m2/g)
(有機物質除去効果)
被処理水(原水)はオセルタミビルを含む水とした。500時間運転後の濃縮装置100、交換式吸着装置200の入出のオセルタミビルを測定して除去効果を確認した。
(有機物質濃度評価)
各水を液相クロマトグラフ法により分析し測定した。
The organic solvent was recovered using the water treatment system 10A described above. Evaluation was performed by the following method.
(BET specific surface area)
The BET specific surface area was measured by measuring the amount of nitrogen adsorbed on the sample when the relative pressure was raised in the range of 0.0 to 0.15 in the atmosphere of the boiling point of liquid nitrogen (-195.8 ° C), and a BET plot. Was used to determine the surface area (m 2 / g) per unit mass of the sample.
(Pore volume)
The pore volume was measured by a nitrogen gas adsorption method at a relative pressure of 0.95.
(Average pore diameter)
The average pore diameter was determined by the following formula.
dp = 40000 Vp / S (where dp: average pore diameter (径))
Vp: pore volume (cc / g)
S: BET specific surface area (m 2 / g)
(Organic substance removal effect)
The treated water (raw water) was water containing oseltamivir. The removal effect was confirmed by measuring oseltamivir entering and leaving the concentrating device 100 and the exchangeable adsorption device 200 after 500 hours of operation.
(Organic substance concentration evaluation)
Each water was analyzed and measured by liquid phase chromatography.
[実施例]
実施例の水処理システムとして、上記実施の形態で説明した水処理システム10Aを使用した。本実施例の水処理システム10Aは、図3に示す構成であり、濃縮装置100からの除去水を濃縮装置100に再度供給す構成である。本実施例では、濃縮装置100の吸着材111、112として、平均細孔径17Å、BET比表面積2050m2/g、全細孔容積0.87m3/gの活性炭素繊維を使用した重量100kgの吸着素子を、処理槽110、120に充填した。また、交換式吸着装置200の吸着材211として、平均細孔径18Å、BET比表面積1350m2/g、全細孔容積0.58m3/gの破砕炭を使用した重量10tの吸着素子を、処理槽220に充填した。
[Example]
As the water treatment system of the example, the water treatment system 10A described in the above embodiment was used. A water treatment system 10A according to the present embodiment has a configuration shown in FIG. In this example, adsorption of 100 kg in weight using activated carbon fibers having an average pore diameter of 17 mm, a BET specific surface area of 2050 m 2 / g, and a total pore volume of 0.87 m 3 / g as the adsorbents 111 and 112 of the concentrator 100. The device was filled in the processing tanks 110 and 120. Further, as an adsorbent 211 of the exchangeable adsorber 200, an adsorbing element having a weight of 10 t using crushed coal having an average pore diameter of 18 mm, a BET specific surface area of 1350 m 2 / g and a total pore volume of 0.58 m 3 / g is treated. Tank 220 was filled.
上記した本実施例の水処理システム10Aにおいて、濃縮装置100に、オセルタミビル0.01mg/Lを含む被処理水を処理水量1000m3/日になるように導入し、第一処理水を得た。その際、第一処理水中のオセルタミビル濃度は0.001mg/Lであり、オセルタミビルの除去率は90%が可能であった In the above-described water treatment system 10A of this example, the water to be treated containing 0.01 mg / L of oseltamivir was introduced into the concentrator 100 so that the amount of treated water was 1000 m 3 / day, thereby obtaining the first treated water. At that time, the concentration of oseltamivir in the first treated water was 0.001 mg / L, and the removal rate of oseltamivir could be 90%.
次に、自重抜きで吸着材111、112の付着水を除去(脱水)した後、除去水を被処理水へ返送した。次に、0.1MPa、300℃の水蒸気を吸着材111、112に供給し脱着した。脱着に使用した水蒸気および吸着材111、112から脱着されたオセルタミビルは濃縮水として回収した。その際、濃縮水は水量400L/日、オセルタミビル濃度は25mg/Lであった。よって、2500倍に被処理水が濃縮されたことがわかる。各工程の切替えは、吸着168h、脱水90sec、脱着3hとした。 Next, after removing (dehydrating) the adhering water from the adsorbents 111 and 112 without removing the dead weight, the removed water was returned to the water to be treated. Next, water vapor of 0.1 MPa and 300 ° C. was supplied to the adsorbents 111 and 112 for desorption. The water vapor used for desorption and oseltamivir desorbed from the adsorbents 111 and 112 were recovered as concentrated water. At that time, the concentrated water was 400 L / day, and the oseltamivir concentration was 25 mg / L. Therefore, it turns out that the to-be-processed water was concentrated 2500 times. Switching between the steps was adsorption 168h, dehydration 90sec, and desorption 3h.
次に、濃縮装置100から排出された濃縮水を交換式吸着装置200に導入し、第二処理水を得た。第二処理水中のオセルタミビル濃度は2mg/Lであり、除去率92%であった。その後、第二処理水を濃縮装置100の原水へ返送した。その結果、濃縮装置100へ導入されるオセルタミビル濃度は0.011mg/Lとなった。 Next, the concentrated water discharged from the concentration apparatus 100 was introduced into the exchangeable adsorption apparatus 200 to obtain second treated water. The concentration of oseltamivir in the second treated water was 2 mg / L, and the removal rate was 92%. Thereafter, the second treated water was returned to the raw water of the concentrator 100. As a result, the concentration of oseltamivir introduced into the concentration apparatus 100 was 0.011 mg / L.
実施例の水処理システム10Aにより浄化された水は、24時間/日、1ヶ月運転後でも90%以上の効率でオセルタミビルの処理が可能であり、破砕炭の交換周期は1年であった。交換式吸着装置200へ導入する濃縮水のオセルタミビル濃度は、被処理水に対して2500倍に濃縮されていることがわかる。よって、実施例の水処理システム10Aは、吸着容量が高まり、交換式吸着装置200の吸着材211の吸着能を十分に活用できる利点がある。 The water purified by the water treatment system 10A of the example was capable of treating oseltamivir with an efficiency of 90% or more even after 24 hours / day and 1 month operation, and the replacement cycle of crushed coal was 1 year. It can be seen that the concentration of oseltamivir in the concentrated water introduced into the exchangeable adsorption device 200 is concentrated 2500 times that of the water to be treated. Therefore, the water treatment system 10 </ b> A according to the embodiment has an advantage that the adsorption capacity is increased and the adsorption capacity of the adsorbent 211 of the exchangeable adsorption apparatus 200 can be fully utilized.
[比較例1]
比較例1として、交換式吸着装置200のみの水処理システムについて検討した。つまり、比較例1の水処理システムは、実施例の水処理システム10Aにおいて濃縮装置100を有していない構成である。比較例1では、交換式吸着装置200の吸着材211として、平均細孔径18Å、BET比表面積1350m2/g、全細孔容積0.58m3/gの破砕炭を使用した重量10tの吸着素子を、処理槽220に充填した。この比較例1の交換式吸着装置200に、実施例と同条件で被処理水を導入し、処理水(実施例の第一処理水に対応)を得た。
[Comparative Example 1]
As Comparative Example 1, a water treatment system using only the exchangeable adsorption device 200 was examined. That is, the water treatment system of Comparative Example 1 has a configuration in which the concentration device 100 is not included in the water treatment system 10A of the example. In Comparative Example 1, an adsorbing element having a weight of 10 t using crushed coal having an average pore diameter of 18 mm, a BET specific surface area of 1350 m 2 / g, and a total pore volume of 0.58 m 3 / g as the adsorbent 211 of the exchangeable adsorber 200. Was filled into the treatment tank 220. The water to be treated was introduced into the exchangeable adsorption device 200 of Comparative Example 1 under the same conditions as in the example to obtain treated water (corresponding to the first treated water in the example).
処理水中のオセルタミビル濃度は0.001mg/Lであり、除去率90%であった。しかし、24時間/日運転において1ヵ月後には除去能が低下し始めたため、交換式吸着装置200の吸着材211の交換が必要となった。つまり、交換式吸着装置200の吸着材211の交換頻度は、実施例の12倍であった。 The concentration of oseltamivir in the treated water was 0.001 mg / L, and the removal rate was 90%. However, since the removal ability began to decline after one month in the 24 hour / day operation, it was necessary to replace the adsorbent 211 of the exchangeable adsorption device 200. That is, the exchange frequency of the adsorbent 211 of the exchangeable adsorption device 200 was 12 times that of the example.
[比較例2]
比較例2として、交換式吸着装置200のバックアップ装置として濃縮装置100を、の交換式吸着装置200の下流に設置した水処理システムについて検討した。つまり、比較例2の水処理システムは、実施例の水処理システム10Aにおいて交換式吸着装置200と濃縮装置100との配置が入れ替わった構成である。
[Comparative Example 2]
As Comparative Example 2, a water treatment system in which the concentrating device 100 was installed downstream of the exchangeable adsorption device 200 as a backup device of the exchangeable adsorption device 200 was examined. That is, the water treatment system of Comparative Example 2 has a configuration in which the arrangement of the exchangeable adsorption device 200 and the concentration device 100 is interchanged in the water treatment system 10A of the example.
比較例2では、交換式吸着装置200の吸着材211として、平均細孔径18Å、BET比表面積1350m2/g、全細孔容積0.58m3/gの破砕炭を使用した重量10tの吸着素子を、処理槽220に充填した。また、濃縮装置100の吸着材111、121として、平均細孔径17Å、BET比表面積2050m2/g、全細孔容積0.87m3/gの活性炭素繊維を使用した重量100kgの吸着素子を、処理槽110、120に充填した。 In Comparative Example 2, an adsorbing element having a weight of 10 t using crushed coal having an average pore diameter of 18 mm, a BET specific surface area of 1350 m 2 / g, and a total pore volume of 0.58 m 3 / g as the adsorbent 211 of the exchangeable adsorbing apparatus 200. Was filled into the treatment tank 220. Further, as the adsorbents 111 and 121 of the concentrator 100, an adsorbing element having a weight of 100 kg using activated carbon fibers having an average pore diameter of 17 mm, a BET specific surface area of 2050 m 2 / g and a total pore volume of 0.87 m 3 / g, The processing tanks 110 and 120 were filled.
上記の比較例2の水処理システムを用いて、実施例と同条件で被処理水を交換式吸着装置200に導入し、第一処理水を得た。その際、第一処理水中のオセルタミビル濃度は0.001mg/L以下であった。 Using the water treatment system of Comparative Example 2 described above, the water to be treated was introduced into the exchangeable adsorption device 200 under the same conditions as in the example to obtain the first treated water. At that time, the concentration of oseltamivir in the first treated water was 0.001 mg / L or less.
次に、交換式吸着装置200から排出された第一処理水を濃縮装置200に導入し、第二処理水を得た。その後、自重抜きで吸着材111、121の付着水を除去した後、除去水を第一処理水へ返送した。次に0.1MPa、300℃の水蒸気を吸着材111または吸着材121に供給し脱着した。脱着に使用した水蒸気および吸着材111または吸着材121から脱着されたオセルタミビルは、濃縮水として回収した。各工程の切替えは、吸着840h、脱水90sec、脱着3hとした。 Next, the 1st treated water discharged | emitted from the exchangeable adsorption apparatus 200 was introduce | transduced into the concentration apparatus 200, and the 2nd treated water was obtained. Then, after removing the adhering water of the adsorbents 111 and 121 by removing the dead weight, the removed water was returned to the first treated water. Next, water vapor of 0.1 MPa and 300 ° C. was supplied to the adsorbent 111 or the adsorbent 121 for desorption. The water vapor used for desorption and oseltamivir desorbed from the adsorbent 111 or the adsorbent 121 were recovered as concentrated water. Switching between the steps was adsorption 840 h, dehydration 90 sec, and desorption 3 h.
その際の濃縮水は水量80L/日、オセルタミビル濃度は14mg/Lで14000倍に第一処理水が濃縮され、濃縮水は、交換式吸着装置200への被処理水へ返送した。その結果、交換式吸着装置200へ導入されるオセルタミビル濃度は0.011mg/Lであった。交換式吸着装置200へ導入する濃縮水のオセルタミビル濃度は、被処理水に対して1.1倍に濃縮されたことがわかる。しかし、濃縮倍率は実施例と比べて低く、実施例1と比べて交換式吸着装置200の吸着材211の吸着能を十分に活用できない。従って、比較例2では、24時間/日運転において、1.5ヵ月後には交換式吸着装置200の除去能が低下し始めたため、交換式吸着装置200の吸着材211の交換が必要となった。つまり、交換式吸着装置200の吸着材211の交換頻度は、実施例の8倍であった。 At that time, the concentrated water was 80 L / day, the oseltamivir concentration was 14 mg / L, the first treated water was concentrated 14000 times, and the concentrated water was returned to the treated water to the exchangeable adsorption device 200. As a result, the concentration of oseltamivir introduced into the exchangeable adsorption device 200 was 0.011 mg / L. It can be seen that the concentration of oseltamivir in the concentrated water introduced into the exchangeable adsorption apparatus 200 was concentrated 1.1 times with respect to the water to be treated. However, the concentration ratio is lower than that of the example, and the adsorption capacity of the adsorbent 211 of the exchangeable adsorption device 200 cannot be fully utilized as compared with the example 1. Therefore, in Comparative Example 2, since the removal ability of the exchangeable adsorption device 200 began to decline after 1.5 months in the 24 hour / day operation, it was necessary to replace the adsorbent 211 of the exchangeable adsorption device 200. . That is, the exchange frequency of the adsorbent 211 of the exchangeable adsorption apparatus 200 was eight times that of the example.
以上の実施例および比較例1,2の交換式吸着装置200の吸着材211の交換頻度を表1にまとめた。 Table 1 summarizes the replacement frequency of the adsorbent 211 in the exchangeable adsorption device 200 of the above-described Examples and Comparative Examples 1 and 2.
本発明の水処理システムは、各種工場や研究施設等から排出される産業排水、最終処分場から排出される浸出水、地下水、および上水等の水から難分解性有機物質を除去して水を清浄化するシステムに有効に利用できる。 The water treatment system of the present invention removes persistent organic substances from water such as industrial wastewater discharged from various factories and research facilities, leachate discharged from final disposal sites, groundwater and tap water. It can be effectively used in a system that cleans water.
10,10A :水処理システム
100:濃縮装置
110:第1処理槽
111:吸着材
112:吸着材(吸脱着素子)
120:第2処理槽
121:吸着材(吸脱着素子)
130:凝縮器
200:交換式吸着装置
211:吸着材(吸着素子)
220:処理槽
221:吸着材
10, 10A: Water treatment system 100: Concentrator 110: First treatment tank 111: Adsorbent 112: Adsorbent (adsorption / desorption element)
120: Second treatment tank 121: Adsorbent (adsorption / desorption element)
130: Condenser 200: Exchangeable adsorption device 211: Adsorbent (adsorption element)
220: Treatment tank 221: Adsorbent
Claims (9)
有機物質を吸脱着する吸脱着素子を備え、被処理水から有機物質を前記吸脱着素子により吸着して第一処理水を排出し、前記吸脱着素子に吸着した有機物質を水蒸気により脱着し、脱着した有機物を含有する水蒸気を液化凝縮して濃縮水とする濃縮装置を有し、
前記交換式吸着装置は、前記濃縮装置から排出された前記濃縮水に含有された前記有機物質を前記吸着素子により吸着して第二処理水を排出し、当該第二処理水を前記被処理水の少なくとも一部として前記濃縮装置に導入する、ことを特徴とする水処理システム。 A water treatment system having an exchangeable adsorption device provided with an exchangeable adsorption element for adsorbing an organic substance,
An adsorption / desorption element for adsorbing and desorbing an organic substance is provided, the organic substance is adsorbed from the water to be treated by the adsorption / desorption element to discharge the first treated water, and the organic substance adsorbed on the adsorption / desorption element is desorbed by water vapor, It has a concentrating device that liquefies and condenses water vapor containing the desorbed organic matter into concentrated water,
The exchangeable adsorption device adsorbs the organic substance contained in the concentrated water discharged from the concentration device by the adsorption element to discharge second treated water, and the second treated water is treated with the treated water. A water treatment system which is introduced into the concentrator as at least a part of the water treatment system.
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