JP6699129B2 - Water treatment system - Google Patents
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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 is necessary to efficiently remove persistent organic substances from industrial wastewater discharged from various factories and research facilities, leachate discharged from final disposal sites, groundwater, and tap water. The present invention relates to a water treatment system that purifies 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。 2. Description of the Related Art Conventionally, as a device for removing harmful organic substances from water to purify them, an exchange-type adsorption device using an adsorbent such as crushed coal, granular coal, or powdered coal has been widely used. The exchange-type adsorption device is a simple processing device that allows water containing an organic substance to flow through a tank filled with the adsorbent and efficiently remove the organic substance in the water by 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 exchange-type adsorption devices are used to treat water to be treated with an activated sludge device, a membrane separation activated sludge device (MBR), a condensation sedimentation device, an evaporative concentration device, an ion exchange device, a membrane separation device, an aeration device, and an accelerated oxidative decomposition device. Installed in various water treatment systems as a backup device that is connected to the latter stage of water treatment equipment such as (AOP) and Fenton reaction equipment, and finally removes the persistent 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 substances referred to here include polychlorinated dibenzoparadioxin (PCDD), polychlorinated dibenzofuran (PCDF), dioxins such as dioxin-like polychlorinated biphenyl (DL-PCB), tetracycline, oseltamivir, oseltamivir phosphate, Antibiotics such as bezafibrate and triclosan, antilipidemic agents such as bezafibrate and fenofibrate, antipyretic and analgesic ingredients such as diclofenac, salicylic acid and acetaminophen, antiepileptic agents such as carbamazepine, humic acid and fulvic acid Refers to humic substances, hexamethylenetetramine, etc. Since these persistent organic substances have problems such as effects on the ecosystem and persistence to 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, in the exchange-type adsorption device, if the adsorption ability of the adsorbent reaches a saturation level by continuously adsorbing the organic substance for a certain period of time, it is necessary to replace the adsorbent with a new one or to take out the adsorbent from the device and regenerate it. 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 system that can perform highly efficient and stable removal by examining the removal of organic substances by adsorption using an adsorbent (adsorption process) and the regeneration of the adsorbent (desorption process) is examined. (For example, Patent Document 1). This wastewater treatment device realizes continuous purification of water, and basically, it is not necessary to replace the adsorbent, and organic substances can be removed stably 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, the activated carbon fibers have a high adsorption rate, and it is known that organic substances can be removed with high efficiency with a small amount of adsorbent. In the water adsorption/desorption type wastewater treatment apparatus, the organic substance that has been adsorbed and removed is desorbed from the adsorbent by the desorption medium when the adsorbent is regenerated, and 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 liquefied and condensed to recover the concentrated water containing the organic substance at a high concentration. Therefore, in this case, the adsorption/desorption type wastewater treatment device also has a function as a concentrating 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 equipment and attach the adsorption/desorption type wastewater treatment equipment as a backup device of the exchangeable adsorption equipment, thereby providing the exchangeable adsorption equipment. A patent has been filed for suppressing the frequency of replacement of the replaceable adsorption device in the system provided (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 to more fully utilize the adsorption performance of the adsorbent filled in the exchange-type adsorption device in the water treatment in which the low-concentration organic substance as described above 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 principle of removal of organic substances in the exchange-type adsorption device is physical adsorption that depends on the Van der Waals force, etc., and as shown in FIG. 1, there is a dependency on the concentration of organic substances in the water to be treated. The lower the concentration, the lower the removal efficiency. In order to solve such a problem, it is possible to use a large amount of adsorbent, but it is inevitable that the device becomes large in size and the installation cost increases, and this is not necessarily an effective countermeasure.
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 problems of the above-mentioned technology, and it is possible to treat organic substances in water with high efficiency, and to reduce the filling amount and the replacement cost of the adsorbent filled in the exchange-type adsorption device. It is intended 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 earnest studies to solve the above problems, the present inventors finally completed the present invention. That is, the present invention is as follows.
(1) A water treatment system having an exchangeable adsorption device provided with exchangeable adsorption elements for adsorbing organic substances,
An adsorption/desorption element for adsorbing/desorbing an organic substance is provided, and an 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 to the adsorption/desorption element is desorbed by steam. It has a concentrating device that liquefies and condenses water vapor containing desorbed organic matter into concentrated water,
The exchange-type adsorbing device adsorbs the organic substance contained in the concentrated water discharged from the concentrating device by the adsorbing element to discharge second treated water, and the second treated water is the treated water. The water treatment system, wherein the water treatment system is introduced as at least a part of the above into the concentrating device.
(2) The concentrating device removes water adhering to the adsorption/desorption element, discharges the water as depleted water, and supplies the depleted water to the device again as at least a part of the water to be treated. The water treatment system according to (1).
(3) The water treatment system according to (2), wherein the concentrator uses water vapor to remove water attached to the adsorption/desorption element.
(4) The water treatment system according to any one of (1) to (3), wherein the adsorption/desorption element contains activated carbon fibers.
(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 Å or more.
(6) The water treatment system according to (1) to (5), wherein the adsorption element contains at least one of activated carbon fiber, activated carbon, zeolite, and activated alumina.
(7) The water treatment system according to (1) to (6), wherein the concentration of the organic substance in the concentrated water is 10 times or more that of the water to be treated.
(8) The water treatment system according to any one of (1) to (7), wherein the organic substance is a persistent organic substance.
(9) The water treatment system according to (1) to (8), wherein the 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 concentrating device having an adsorption/desorption element is provided, and the concentrating device adsorbs the organic substance of the water to be treated and introduces the concentrated water after desorption into the exchange-type adsorption device. Further, the second treated water after adsorbing the organic substance by the exchange type adsorbing device is returned to the concentrating device. Therefore, it is possible to increase the adsorption efficiency of the exchange-type adsorption device by efficiently removing the organic substances in the water to be treated by the concentrating device, reducing the volume of the water to be treated, and concentrating the organic substance concentration. Therefore, there is an advantage that the exchange frequency of the adsorbent of the exchange-type 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 highly efficiently treating an organic substance in water to be treated and reducing the filling amount and the exchange cost of the adsorbent filled in the exchange-type adsorption device. You can
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 designated by the same reference numerals in the drawings, and the 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 an exchangeable 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 has a first processing tank 110 and a second processing tank 120 in which adsorbents 111 and 121 as adsorption/desorption elements are housed, respectively. The adsorbents 111 and 121 adsorb the organic substance contained in the water to be treated by contacting the water to be treated. Therefore, in the concentrator 100, by supplying the water to be treated to the adsorbents 111 and 121, the organic substances are adsorbed by the adsorbents 111 and 121, whereby the water to be treated is purified 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 contacting a smaller amount of water vapor than the supplied water to be treated. 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 then discharged as concentrated water to the outside of the concentrator 100.
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。 The first treatment tank 110 and the second treatment tank 120 are connected with respective pipes of a treated water (raw water) supply line, a first treated water discharge line, a steam supply line, and a concentrated water discharge line. There is. Each line has a configuration in which a flow path switching unit that is connected/disconnected to each processing tank is connected using a valve or the like. The first processing tank 110 and the second processing tank 120 alternately function as an adsorption tank and a desorption tank by operating the flow path switching means. When the first treatment tank 110 functions as an adsorption tank, the second treatment tank 120 functions as a desorption tank. Specifically, when the water to be treated is supplied to the first treatment tank 110 and the flow path is secured so that the first treated water is discharged from the first treatment tank 110, the second treated tank 120 is treated. Has a flow path configuration in which steam is supplied and concentrated water is discharged from the second processing tank 120. In the concentrating device 100 of the present embodiment, 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 concentrating device 100 is a device that, when the adsorption tank is switched to the desorption tank, removes (dehydrates) water adhering to the adsorbents 111 and 121 and discharges it as removed water, and then starts desorption by supplying steam. It is preferable to have. This is because it is possible to reduce the volume of concentrated water and increase the concentration ratio by removing water adhering to the adsorbents 111 and 121 in advance and then performing water vapor desorption, compared to the case where water is not removed 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 means for removing the adhered water, means such as self-weight removal, high-speed purging with high-pressure gas such as compressed air/nitrogen/steam, suction using a vacuum pump, etc. can be used, but high-speed purging with steam is preferred. High-speed purging with steam eliminates the need for a separate means for removing adhered water, enables highly efficient removal of adhered water, and also heats the adsorption tank, increasing the concentration ratio and desorption efficiency. Is. The steam used for dehydration is liquefied and condensed when it comes into contact with the adhered water and becomes a 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 again to the concentrating device 100. This is because it is not necessary to separately treat the removed water with another water treatment device. 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 that 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, the description of the water treatment system 10A is omitted. In the water treatment system 10A, the flow of supplying the removed water again and the flow of flowing the concentrated water to the concentrator 130 are switched by a switching device 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, as the adsorbents 111 and 121, activated carbon, activated carbon fiber, zeolite, or the like can be used, but it is more preferable to use activated carbon fiber. Activated carbon fiber has a fibrous structure with micropores on the surface, so 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 fibers that can be used as the adsorbents 111 and 121 are not particularly limited. It may be appropriately selected according to the organic substance to be removed. The organic substance treated by the water treatment system 10 is a hardly decomposable organic substance as described below, and the hardly decomposable organic substance includes activated carbon fibers having a relatively large molecular size, a high specific surface area, and a large pore diameter. Are suitable. Therefore, the activated carbon fibers that can be used as the adsorbents 111 and 121 preferably have, for example, a specific surface area of 1600 m 2 /g or more and an average pore diameter of 16 Å 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, etc. of water vapor, which is the desorption medium of the concentrator 100, are not particularly limited, but may be set as appropriate according to the heat-resistant temperature of the adsorbents 111, 121 used and the physical properties of the organic substance to be desorbed. However, it is necessary to perform desorption with steam having a mass smaller than the mass of the water to be treated supplied to the concentrator 100. If the mass of water vapor is larger, the organic substance is not concentrated, and concentrated water containing a higher concentration of the organic substance than the concentration of the organic substance 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. This is because if the concentration is 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, by desorbing with a water vapor amount of 1/10 or less of the water to be treated, it can be concentrated 10 times or more.
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 concentrating device 100 has been described as using the two adsorbents 111 and 112 and the processing tanks 110 and 120, but may have a configuration using three or more processing tanks. Further, a configuration using one adsorbent and a treatment tank may be used. For example, if one adsorbent and a treatment tank are used, and if the treatment tank is functioning 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 exchange-type adsorption device 200 has a processing tank 220 in which an adsorbent 211 is stored. As described above, the concentrated water is passed through the treatment tank 220, the adsorbent 211 adsorbs the organic substance in the water, and the second treated water is discharged to purify the water. When the adsorption capacity of the adsorbent 211 reaches saturation, the purifying ability of the organic substance in the water disappears. Therefore, the purifying ability can be maintained by replacing the adsorbent 211 with a new one, or taking it out and regenerating it and refilling it.
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。 The exchangeable adsorption device 200 is supplied with the concentrated water discharged from the concentrating device 100. As shown in FIG. 1, the higher the organic substance concentration in the water, the larger the adsorption capacity, so that the frequency of replacement or regeneration of the adsorbent 211 can be reduced, or the filling amount of the adsorbent 211 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。 Further, it is preferable that the second treated water discharged from the exchangeable adsorption device 200 is mixed with the water to be treated and retreated by the concentrating device 200. Assuming that the second treated water is removed to the organic substance concentration below the first treated water and mixed with the first treated water and discharged without using such a configuration, the replacement frequency and the 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 one in which organic substances have been removed to the extent that the removal performance of the concentrating device 100 is not affected (for example, water that has been removed to an organic substance concentration of the water to be treated).
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。 As the adsorbent material 211, activated carbon fiber, activated carbon, zeolite, activated alumina or the like can be used, but it may be appropriately selected depending on the organic substance to be removed. The shape may be fibrous, granular or 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。 With the water treatment systems 10 and 10A according to the present embodiment described above, the concentrating device 100 removes organic substances from the water to be treated with high efficiency and concentrates the concentration of the organic substances in the water to be treated so that the exchange-type adsorbing device can be used. It functions as a device that effectively utilizes the adsorption capacity of the adsorbent 211 of 200. Therefore, according to the present invention, it is possible to provide a water treatment system capable of performing highly efficient and stable water treatment while preventing an increase in the size of the exchangeable adsorption device 200 and an increase in the frequency of exchanging adsorbents. You can Further, since the exchangeable adsorption device 200 functions as a secondary treatment device of the concentrating device 100, there is an advantage that the post-treatment device of the concentrating device 100 is 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 embodiment of the present invention described above, the components such as the fluid transporting means such as the pump and the fan and the fluid storing means such as the storage tank are described without being particularly shown. It may be arranged at 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 water to be treated that is treated by the water treatment system 10 of the present embodiment is a persistent organic substance. That is, polychlorinated dibenzoparadioxin (PCDD), polychlorinated dibenzofuran (PCDF), dioxin-like polychlorinated biphenyls (DL-PCB) and other dioxins, tetracycline, oseltamivir, oseltamivir phosphate, bezafibrate, triclosan, and other antibiotics, bezafibrate. , Antilipidemic agents such as fenofibrate, antipyretic analgesics such as diclofenac, salicylic acid, acetaminophen, antiepileptic agents such as carbamazepine, humic substances such as humic acid and fulvic acid, and hexamethylenetetramine. .. As described above, the conventional exchange-type adsorption device is a device for the purpose of finally removing organic substances that have not been treated by various water treatment devices, and the above-mentioned organic substances are applicable as treatment targets.
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 concentration of organic substances in the water to be treated by the water treatment system 10 of this embodiment is 0.5 mg/L or less. As described above, it can be assumed that the organic substances to be removed are reduced to some extent from the purpose of installing the conventional exchange-type adsorption device. In the water treatment system 10 of the present embodiment, by concentrating the water to be treated containing the low-concentration organic substance with the concentrating device 100, it is possible to obtain the effect of maximizing the treatment capacity of the exchangeable adsorption device 200. This is because if the concentration of the organic substance is high, this effect cannot be obtained.
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。 It should be noted that the above-described embodiments disclosed this time are examples in all respects, and are not restrictive. The technical scope of the present invention is defined by the claims, and includes the meaning equivalent to the description of the claims and all modifications within the scope.
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. The evaluation was performed by the following method.
(BET specific surface area)
The BET specific surface area is a BET plot obtained by measuring the amount of nitrogen adsorbed on the sample at several points when the relative pressure is raised in the range of 0.0 to 0.15 in the atmosphere of the boiling point of liquid nitrogen (-195.8° C.). The surface area (m 2 /g) per unit mass of the sample was determined by.
(Pore volume)
The pore volume was measured by a nitrogen gas gas adsorption method at a relative pressure of 0.95.
(Average pore size)
The average pore diameter was calculated by the following formula.
dp=40,000 Vp/S (however, dp: average pore diameter (Å))
Vp: Pore volume (cc/g)
S: BET specific surface area (m 2 /g)
(Effect of removing organic substances)
The water to be treated (raw water) was water containing oseltamivir. The removal effect was confirmed by measuring oseltamivir in and out of the concentrating device 100 and the exchangeable adsorption device 200 after 500 hours of operation.
(Evaluation of organic substance concentration)
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. The water treatment system 10A of the present embodiment has the configuration shown in FIG. 3 and is configured to supply the removed water from the concentrating device 100 to the concentrating device 100 again. In this embodiment, as the adsorbents 111 and 112 of the concentrator 100, activated carbon fibers having an average pore diameter of 17Å, a BET specific surface area of 2050 m 2 /g, and a total pore volume of 0.87 m 3 /g are used and adsorbed with a weight of 100 kg. The device was filled in the processing baths 110 and 120. Further, as the adsorbent 211 of the exchangeable adsorption device 200, an adsorption element having a weight of 10 t, which uses crushed carbon having an average pore diameter of 18 Å, a BET specific surface area of 1350 m 2 /g, and a total pore volume of 0.58 m 3 /g, is treated. The 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 water treatment system 10A of the present embodiment described above, 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, and the first treated water was obtained. At that time, the concentration of oseltamivir in the first treated water was 0.001 mg/L, and the removal rate of oseltamivir was 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 on the adsorbents 111 and 112 by removing the own 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 to be desorbed. The water vapor used for desorption and the oseltamivir desorbed from the adsorbents 111 and 112 were recovered as concentrated water. At that time, the concentrated water had a water amount of 400 L/day, and the oseltamivir concentration was 25 mg/L. Therefore, it can be seen that the water to be treated was concentrated 2500 times. The switching of each step was adsorption 168 h, dehydration 90 sec, and desorption 3 h.
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 device 100 was introduced into the exchange-type adsorption device 200 to obtain the second treated water. The oseltamivir concentration in the second treated water was 2 mg/L, and the removal rate was 92%. Then, the second treated water was returned to the raw water of the concentrator 100. As a result, the concentration of oseltamivir introduced into the concentrator 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 operating for 24 hours/day for 1 month, and the crushed coal exchange period was 1 year. It can be seen that the concentration of oseltamivir in the concentrated water introduced into the exchange-type adsorption device 200 is 2500 times that of the water to be treated. Therefore, the water treatment system 10A of the embodiment has an advantage that the adsorption capacity is increased and the adsorption capacity of the adsorbent 211 of the exchangeable adsorption device 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 including only the exchangeable adsorption device 200 was examined. That is, the water treatment system of Comparative Example 1 does not have the concentrating device 100 in the water treatment system 10A of the embodiment. In Comparative Example 1, as the adsorbent 211 of the exchange-type adsorption device 200, an adsorbent element having an average pore diameter of 18Å, a BET specific surface area of 1350 m 2 /g, and a crushed carbon having a total pore volume of 0.58 m 3 /g and a weight of 10 t is used. Was filled in the processing tank 220. To-be-treated water was introduced into the exchange-type 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 oseltamivir concentration in the treated water was 0.001 mg/L, and the removal rate was 90%. However, after one month of operation for 24 hours/day, the removal capacity began to decline, and it became necessary to replace the adsorbent 211 of the exchange-type adsorption device 200. That is, the exchange frequency of the adsorbent 211 of the exchange-type 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 as a backup device of the exchangeable adsorption device 200 and the downstream 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 concentrating device 100 is replaced in the water treatment system 10A of the embodiment.
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, as the adsorbent 211 of the exchange-type adsorption device 200, an adsorbent element having an average pore diameter of 18 Å, a BET specific surface area of 1350 m 2 /g, and a crushed carbon having a total pore volume of 0.58 m 3 /g and a weight of 10 t is used. Was filled in the processing tank 220. Further, as the adsorbents 111 and 121 of the concentrator 100, an adsorbent element having an average pore diameter of 17Å, a BET specific surface area of 2050 m 2 /g, and an activated carbon fiber having a total pore volume of 0.87 m 3 /g and a weight of 100 kg is used. 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 exchange-type adsorption device 200 under the same conditions as in the example to obtain the first treated water. At that time, the oseltamivir concentration 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 first treated water discharged from the exchangeable adsorption device 200 was introduced into the concentrating device 200 to obtain the second treated water. Then, after removing the adhering water of the adsorbents 111 and 121 by removing its own 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 the oseltamivir desorbed from the adsorbent 111 or the adsorbent 121 was recovered as concentrated water. The switching of each process 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。 The concentrated water at that time was 80 L/day in water amount and the oseltamivir concentration was 14 mg/L, and the first treated water was concentrated 14000 times, and the concentrated water was returned to the treated water to the exchange-type 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 exchange-type adsorption device 200 was 1.1 times that of the water to be treated. However, the concentration ratio is lower than that of the embodiment, and the adsorption capacity of the adsorbent 211 of the exchangeable adsorption device 200 cannot be fully utilized as compared with the first embodiment. Therefore, in Comparative Example 2, the removal capacity of the exchangeable adsorption device 200 began to decrease after 1.5 months in 24 hours/day operation, and therefore the adsorption material 211 of the exchangeable adsorption device 200 had to be replaced. .. That is, the replacement frequency of the adsorbent 211 of the exchangeable adsorption device 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 of the exchange-type 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 for cleaning systems.
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 (8)
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高温の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し、
前記有機物質は難分解性有機物質であり、
前記水蒸気の温度は３００度以上であり、水蒸気供給速度は前記吸脱着素子１ｋｇに対して９．６６ｋｇ／ｈ以下であることを特徴とする水処理システム。 What is claimed is: 1. A water treatment system having an exchangeable adsorption device, which is provided with exchangeable adsorption elements for adsorbing organic substances,
Equipped with an adsorption/desorption element for adsorbing/desorbing an organic substance, 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 high-temperature steam. And has a concentrating device that liquefies and condenses water vapor containing the desorbed organic matter into concentrated water,
The exchange-type adsorbing device adsorbs the organic substance contained in the concentrated water discharged from the concentrating device by the adsorbing element to discharge second treated water, and the second treated water is the treated water. Introduced into the concentrator as at least part of
The organic materials Ri hardly decomposable organic substances der,
The temperature of the steam is not less than 300 degrees, the water treatment system steam supply rate, characterized in der Rukoto below 9.66kg / h with respect to the desorption device 1 kg.
１から７のいずれか１項に記載の水処理システム。 The water treatment system according to any one of claims 1 to 7 , wherein an organic substance concentration in the water to be treated is 0.5 mg/L or less.
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