JPH08155434A - System for recovery of pure water from waste water - Google Patents
System for recovery of pure water from waste waterInfo
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- JPH08155434A JPH08155434A JP6305775A JP30577594A JPH08155434A JP H08155434 A JPH08155434 A JP H08155434A JP 6305775 A JP6305775 A JP 6305775A JP 30577594 A JP30577594 A JP 30577594A JP H08155434 A JPH08155434 A JP H08155434A
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- Prior art keywords
- pure water
- org
- matter
- water
- waste water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、たとえば合成樹脂の成
形工程から出る廃水から純水を回収して再利用に供する
システムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for recovering pure water from waste water discharged from a synthetic resin molding process for reuse.
【０００２】[0002]
【従来の技術】合成樹脂成形工程からは、重合度の異な
る樹脂成分、単量体および有機溶媒などの有機物を含む
廃水が排出される。2. Description of the Related Art From a synthetic resin molding process, waste water containing resin components having different degrees of polymerization, monomers and organic substances such as organic solvents is discharged.
【０００３】従来、このような廃水の処理装置として
は、廃水に含まれる樹脂成分を凝集沈殿装置や限外濾
過、逆浸透などの膜分離装置で除去した後、これらによ
って除去できない物質、例えば、フェノール、メタノー
ルやホルマリンなどを分解・除去するための生物処理装
置で廃水のＣＯＤ値やＢＯＤ値などを環境への排水が可
能なレベルまで下げて廃水を放流する方法が採用されて
いた。Conventionally, as such a waste water treatment apparatus, after removing the resin component contained in the waste water by a coagulation sedimentation apparatus or a membrane separation apparatus such as ultrafiltration or reverse osmosis, a substance which cannot be removed by these, for example, A biological treatment device for decomposing and removing phenol, methanol, formalin, etc., has adopted a method of reducing the COD value and BOD value of wastewater to a level at which it can be discharged to the environment and discharging the wastewater.
【０００４】しかし、この方法では、上記のごとく膜分
離装置および生物処理装置を設置する必要があり、設備
が大掛かりなものとなっていた。However, in this method, it was necessary to install the membrane separation device and the biological treatment device as described above, and the equipment was large-scaled.
【０００５】また、これらの処理方法によって得られる
処理水の水質改善には限界があり、例えば純水を得よう
とする場合には、濁質を除去するための濾過装置、有機
物含有量を低減するための活性炭吸着装置や紫外線酸化
装置などの有機物除去装置、導電率を例えば１μＳ／ｃ
ｍ以下にするためのイオン交換装置などを設けてさらな
る処理を行なう必要があり、これらに伴って、濾過装置
の逆洗廃水やイオン交換装置の再生に用いた廃液が多量
に排出される問題があった。Further, there is a limit to the improvement of the quality of treated water obtained by these treatment methods. For example, when pure water is to be obtained, a filtering device for removing suspended matter and a reduction in organic matter content are required. To remove organic substances such as an activated carbon adsorption device or an ultraviolet oxidation device to reduce the conductivity to 1 μS / c
It is necessary to provide an ion exchange device or the like for further reducing the m or less, and with this, there is a problem that a large amount of backwash waste water of the filtration device or waste liquid used for regeneration of the ion exchange device is discharged. there were.
【０００６】このため、従来、処理廃水の再利用はほと
んど行なわれていなかった。For this reason, conventionally, almost no reuse of treated wastewater has been carried out.
【０００７】[0007]
【発明が解決しようとする課題】この発明は、大掛かり
な生物処理装置や濾過装置および有機物除去装置やイオ
ン交換装置を設けずに、上記廃水から純水を回収するシ
ステムを提供することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a system for recovering pure water from the above wastewater without providing a large-scale biological treatment device, filtration device, organic matter removal device and ion exchange device. To do.
【０００８】[0008]
【課題を解決するための手段】この発明による、廃水か
らの純水回収システムは、合成樹脂の成形工程から出る
有機物を含む廃水から純水を回収するシステムにおい
て、蒸溜塔とその後流の蒸発法純水装置とからなること
を特徴とするものである。A pure water recovery system from waste water according to the present invention is a system for recovering pure water from waste water containing organic substances discharged from a molding step of a synthetic resin in a distillation tower and a subsequent evaporation method. It is characterized by comprising a pure water device.
【０００９】このシステムでは、蒸溜塔によって廃水中
のメタノール、ホルマリン、フェノールなどの低沸点有
機物を分離・除去した後、被処理水を多重効用法、多段
フラッシュ法、蒸気圧縮法などの蒸発法純水製造装置に
供給して純水を製造し、再利用に供する。In this system, low boiling point organic substances such as methanol, formalin and phenol in the waste water are separated and removed by a distillation tower, and then the water to be treated is subjected to a multi-effect method, a multi-stage flash method, a vapor compression method and other pure evaporation methods. It is supplied to a water production device to produce pure water, which is then reused.
【００１０】この蒸発法純水製造装置は被処理水を蒸発
させ、発生した水蒸気を凝縮させて純水を製造するの
で、被処理水中の濁質、イオン類および沸点の高い有機
物を同時に分離・除去することができる。また低沸点有
機物は前流の蒸溜操作で分離・除去されているので、被
処理水を蒸発させる際に低沸点有機物が蒸発水蒸気に同
伴し、不純物として凝縮水すなわち純水側へ移行するこ
とがない。Since the pure water producing apparatus for vaporization by the evaporation method evaporates the water to be treated and condenses the generated water vapor to produce pure water, turbid substances, ions and organic substances having a high boiling point in the water to be treated are simultaneously separated and separated. Can be removed. In addition, since the low-boiling organic matter is separated and removed by the distillation operation in the upstream, when the water to be treated is evaporated, the low-boiling organic matter is accompanied with the vaporized water vapor and may be transferred to the condensed water, that is, the pure water side as an impurity. Absent.
【００１１】このようにして、廃水から、導電率が例え
ば１μＳ／ｃｍ以下で、かつ、有機物含有量の低い純水
を回収し、再利用に供することができる。In this way, pure water having a conductivity of, for example, 1 μS / cm or less and a low organic matter content can be recovered from the waste water and reused.
【００１２】一方、蒸溜操作で分離・除去された低沸点
有機物は蒸溜塔頂から溜出液として取り出され、また、
蒸発法純水製造装置の被処理水に含まれる不純物は、純
水製造装置の濃縮水に濃縮されてシステムから排水とし
て排出される。On the other hand, the low boiling point organic matter separated and removed by the distillation operation is taken out as a distillate from the top of the distillation tower, and
Impurities contained in the water to be treated in the pure water production apparatus by the evaporation method are concentrated in concentrated water in the pure water production apparatus and discharged from the system as waste water.
【００１３】これらの排水は、濃縮・減容化されている
ので、処理・処分のための設備は少要量なもので済む。Since these wastewaters are concentrated and reduced in volume, the amount of equipment for treatment and disposal is small.
【００１４】また、この発明によるもう１つの、廃水か
らの純水回収システムは、合成樹脂の成形工程から出る
有機物を含む廃水から純水を回収するシステムにおい
て、凝集沈殿装置および／または膜分離装置によって樹
脂成分を除去する前処理装置とその後流の蒸溜塔とその
後流の蒸発法純水装置とからなることを特徴とするもの
である。Another pure water recovery system from waste water according to the present invention is a system for recovering pure water from waste water containing organic substances from a synthetic resin molding step, which is a coagulating sedimentation device and / or a membrane separation device. It is characterized in that it comprises a pretreatment device for removing the resin component by means of the above, a distillation column in the subsequent flow, and an evaporation method pure water device in the subsequent flow.
【００１５】この第２のシステムは、廃水に含まれる樹
脂成分が、加熱・蒸溜操作時に変質または反応して装置
の障害となる場合に適用されるもので、凝集沈殿装置や
膜分離装置あるいはこの両方からなる前処理装置によっ
て、後流で行なう加熱・蒸溜操作時に変質または反応し
て装置の障害となる廃水中の樹脂成分を予め除去してお
き、次いで蒸溜操作によってメタノール、ホルマリン、
フェノールなどの低沸点有機物を分離・除去した後、被
処理水を多重効用法、多段フラッシュ法、蒸気圧縮法な
どの蒸発法純水製造装置に供給して純水を製造し、再利
用に供するものである。This second system is applied when the resin component contained in the wastewater is deteriorated or reacts during the heating / distilling operation and becomes an obstacle to the apparatus. With a pretreatment device consisting of both, the resin component in the wastewater that deteriorates or reacts during the heating / distilling operation performed in the downstream and interferes with the device is removed in advance, and then methanol, formalin, and
After separating and removing low boiling point organic substances such as phenol, the water to be treated is supplied to the pure water production equipment for evaporation method such as multi-effect method, multi-stage flash method, vapor compression method, etc. to produce pure water for reuse. It is a thing.
【００１６】合成樹脂成形工程から排出される廃水には
重合度の異なる樹脂成分、単量体や有機溶媒が含まれ
る。例えば、合成樹脂がポリビニルアルコール樹脂やア
クリル樹脂の場合、樹脂成分のほかにホルマリンが含ま
れていると、廃水を加熱した場合にこれが反応し固化す
る。また合成樹脂が熱硬化性の場合、例えばフェノール
樹脂の場合には、加熱すると樹脂成分とホルマリンが縮
合反応して固化する。このように加熱によって固化が起
こる樹脂成分を含む廃水の場合、前処理を行なわずに後
流の蒸溜塔および蒸発法純水製造装置に廃水を供給する
と、装置内部に樹脂成分が固着する問題が起きるので、
蒸溜塔の前流で樹脂成分を分離・除去する必要がある。The waste water discharged from the synthetic resin molding process contains resin components, monomers and organic solvents having different degrees of polymerization. For example, when the synthetic resin is a polyvinyl alcohol resin or an acrylic resin, if formalin is contained in addition to the resin component, this reacts and solidifies when the wastewater is heated. When the synthetic resin is thermosetting, for example, when it is a phenol resin, the resin component and the formalin undergo a condensation reaction and solidify when heated. In the case of wastewater containing a resin component that is solidified by heating in this way, if wastewater is supplied to a downstream distillation tower and an evaporation method pure water production device without performing pretreatment, there is a problem that the resin component is fixed inside the device. I'll get up,
It is necessary to separate and remove the resin component in the upstream of the distillation tower.
【００１７】樹脂成分の分離・除去は、樹脂の種類によ
って、凝集沈殿装置、または、限外濾過または逆浸透法
による膜分離装置、あるいは凝集沈殿装置と膜分離装置
の両方を使用して行われる。Separation / removal of the resin component is carried out by using a coagulation-sedimentation device, a membrane separation device by ultrafiltration or reverse osmosis, or both a coagulation-sedimentation device and a membrane separation device, depending on the type of resin. .
【００１８】[0018]
【実施例】この発明による廃水からの純水回収システム
の例を図に基づき具体的に説明する。EXAMPLE An example of a pure water recovery system from waste water according to the present invention will be specifically described with reference to the drawings.
【００１９】実施例１ 図１において、廃水回収システムは、蒸溜装置(I) と蒸
発法純水製造装置(II)からなる。蒸溜装置(I) は、充填
塔または棚段塔タイプの蒸溜塔(1) と、同塔の塔底に付
設された再沸器(2) と、塔頂に付設された冷却器(3)
と、ポンプ類を備えている。蒸発法純水製造装置(II)は
多重効用法を採用したものであって、蒸発器(4) と、複
数の効用ポンプ(5) と、純水ポンプ(6) と、真空装置
(7) からなる。Example 1 In FIG. 1, the waste water recovery system comprises a distillation apparatus (I) and an evaporation method pure water production apparatus (II). The distillation apparatus (I) consists of a packed tower or plate tower type distillation tower (1), a reboiler (2) attached to the bottom of the tower, and a cooler (3) attached to the top of the tower.
And equipped with pumps. The evaporative method pure water production system (II) adopts the multiple effect method, and includes an evaporator (4), a plurality of effect pumps (5), a pure water pump (6), and a vacuum device.
It consists of (7).
【００２０】上記構成の廃水からの純水回収システムに
おいて、合成樹脂成形工程から排出された廃水は、ま
ず、蒸溜装置(I) の蒸溜塔(1) に供給される。蒸溜塔
(1) 内で廃水が濃縮され、塔頂からメタノール、ホルマ
リン、フェノールなどの低沸点有機物が溜出液として取
り出され、この一部は還流液として蒸溜塔へ返され、残
りは低沸点有機物が濃縮された廃液として排出される。
排出する廃液量は蒸溜塔(1) に供給された被処理水量の
例えば１０％である。塔底からは、低沸点有機物が除去
された結果、不純物として主に非揮発性有機物と溶解塩
類を含む缶出液が取り出される。In the system for recovering pure water from waste water having the above structure, the waste water discharged from the synthetic resin molding step is first supplied to the distillation tower (1) of the distillation apparatus (I). Distillation tower
Waste water is concentrated in (1), low boiling point organic substances such as methanol, formalin, and phenol are taken out as a distillate from the top of the column, part of this is returned to the distillation column as reflux liquid, and the rest is low boiling point organic substances. It is discharged as a concentrated waste liquid.
The amount of waste liquid discharged is, for example, 10% of the amount of water to be treated supplied to the distillation column (1). As a result of removing the low-boiling-point organic matter from the bottom of the column, bottoms containing mainly non-volatile organic matter and dissolved salts as impurities are taken out.
【００２１】この缶出液は、ついで蒸発法純水製造装置
(II)の蒸発器(4) に供給される。蒸発器(4) には加熱用
蒸気が供給され、蒸発器給水を蒸発処理することによっ
て導電率が例えば１μＳ／ｃｍ以下で、かつ、有機物含
有量の低い純水が得られる。得られる純水の量は蒸発器
(4) に供給された蒸溜塔缶出液の例えば９０％であり、
残りは濃縮された廃水として排出される。This bottom solution is then subjected to the evaporation method pure water production apparatus.
It is supplied to the evaporator (4) of (II). Heating vapor is supplied to the evaporator (4), and pure water having a conductivity of, for example, 1 μS / cm or less and a low organic matter content is obtained by evaporating the feed water of the evaporator. The amount of pure water obtained is the evaporator
For example, 90% of the bottoms of the distillation tower supplied to (4) is
The rest is discharged as concentrated wastewater.
【００２２】実施例２ 廃水に含まれる樹脂成分が蒸溜操作の障害となる場合に
は、この実施例に示す方式を適用する。Example 2 When the resin component contained in the wastewater interferes with the distillation operation, the method shown in this example is applied.
【００２３】図２において、この廃水回収システムは前
処理装置(III) と蒸溜装置(I) と蒸発法純水製造装置(I
I)からなる。前処理装置(III) は、凝集沈殿装置(8) と
その後流の膜分離装置(9) とポンプ類などを備えてい
る。蒸溜装置(I) は、充填塔または棚段塔タイプの蒸溜
塔(1) と、同塔の塔底に付設された再沸器(2) と、塔頂
に付設された冷却器(3) と、ポンプ類を備えている。蒸
発法純水製造装置(II)は多重効用法を採用したものであ
って、蒸発器(4) と、複数の効用ポンプ(5) と、純水ポ
ンプ(6) と、真空装置(7) からなる。In FIG. 2, this wastewater recovery system comprises a pretreatment device (III), a distillation device (I), and an evaporation method pure water production device (I
It consists of I). The pretreatment device (III) is equipped with a coagulation sedimentation device (8), a downstream membrane separation device (9), pumps and the like. The distillation apparatus (I) consists of a packed tower or plate tower type distillation tower (1), a reboiler (2) attached to the bottom of the tower, and a cooler (3) attached to the top of the tower. And equipped with pumps. The evaporative method pure water production system (II) adopts the multiple effect method, and includes an evaporator (4), a plurality of effect pumps (5), a pure water pump (6), and a vacuum device (7). Consists of.
【００２４】上記構成の廃水からの純水回収システムに
おいて、合成樹脂成形工程から排出される廃水には、重
合度の異なる樹脂成分、単量体や有機溶媒が含まれてい
る。この廃水は、凝集のために必要な薬品が添加された
後、凝集沈殿装置(8) へ供給され、凝集操作で固形物と
なった樹脂成分が分離・除去される。In the system for recovering pure water from wastewater having the above structure, the wastewater discharged from the synthetic resin molding step contains resin components, monomers and organic solvents having different degrees of polymerization. This wastewater is supplied with a chemical necessary for coagulation and then supplied to the coagulation-sedimentation apparatus (8) to separate and remove the resin component which has become a solid by the coagulation operation.
【００２５】つぎに、廃水は限外濾過または逆浸透法に
よる膜分離装置(9) に供給されて、凝集沈殿によって分
離・除去できなかった樹脂成分がここで分離・除去され
る。樹脂の種類によっては凝集沈殿装置(8) と膜分離装
置(9) のどちらかを省略してもよい。Next, the wastewater is supplied to a membrane separation device (9) by the ultrafiltration or reverse osmosis method, and the resin component which cannot be separated / removed by coagulation sedimentation is separated / removed here. Depending on the type of resin, either the coagulation-sedimentation device (8) or the membrane separation device (9) may be omitted.
【００２６】前処理装置で樹脂成分が除去された被処理
水は、ついで蒸溜装置(I) の蒸溜塔(1) に供給される。
蒸溜塔(1) 内で廃水が濃縮され、塔頂からメタノール、
ホルマリン、フェノールなどの低沸点有機物が溜出液と
して取り出され、この一部は還流液として蒸溜塔へ返さ
れ、残りは低沸点有機物が濃縮された廃液として排出さ
れる。排出する廃液量は蒸溜塔(1) に供給された被処理
水量の例えば１０％である。塔底からは、低沸点有機物
が除去された結果、不純物として主に非揮発性有機物と
溶解塩類を含む缶出液が取り出される。The water to be treated from which the resin component has been removed by the pretreatment device is then supplied to the distillation tower (1) of the distillation device (I).
Waste water is concentrated in the distillation tower (1), and methanol is
Low-boiling organic substances such as formalin and phenol are taken out as a distillate, part of this is returned to the distillation column as a reflux liquid, and the rest is discharged as a waste liquid in which the low-boiling organic substances are concentrated. The amount of waste liquid discharged is, for example, 10% of the amount of water to be treated supplied to the distillation column (1). As a result of removing the low-boiling-point organic matter from the bottom of the column, bottoms containing mainly non-volatile organic matter and dissolved salts as impurities are taken out.
【００２７】この缶出液は、ついで蒸発法純水製造装置
(II)の蒸発器(4) に供給される。蒸発器(4) には加熱用
蒸気が供給され、蒸発器給水を蒸発処理することによっ
て導電率が例えば１μＳ／ｃｍ以下で、かつ、有機物含
有量の低い純水が得られる。得られる純水の量は蒸発器
(4) に供給された蒸溜塔缶出液の例えば９０％であり、
残りは濃縮された廃水として排出される。This bottom solution is then subjected to an evaporation method pure water producing apparatus.
It is supplied to the evaporator (4) of (II). Heating vapor is supplied to the evaporator (4), and pure water having a conductivity of, for example, 1 μS / cm or less and a low organic matter content is obtained by evaporating the feed water of the evaporator. The amount of pure water obtained is the evaporator
For example, 90% of the bottoms of the distillation tower supplied to (4) is
The rest is discharged as concentrated wastewater.
【００２８】[0028]
【発明の効果】この発明による廃水からの純水回収シス
テムによれば、大掛かりな生物処理装置や濾過装置およ
び有機物除去装置やイオン交換装置を設けずに、蒸溜塔
と蒸発法純水製造装置からなる一貫した熱システムで純
水を回収でき、これを再利用に供することができる。同
時に、廃水の大幅な濃縮・減容化が達成できるので、最
終的な廃水の処理・処分のための設備をコンパクトなも
のにできる上に、回収した純水の再利用により、用水の
取水量と環境への放流廃水量を大幅に低減できる。According to the pure water recovery system from wastewater according to the present invention, a distillation tower and an evaporation method pure water production apparatus can be used without providing a large-scale biological treatment apparatus, filtration apparatus, organic matter removal apparatus, or ion exchange apparatus. Pure water can be collected with a consistent thermal system and can be reused. At the same time, it is possible to achieve a large concentration and volume reduction of the wastewater, which makes it possible to make the equipment for the final treatment and disposal of the wastewater compact and to reuse the collected pure water to take in And the amount of wastewater discharged to the environment can be greatly reduced.
【図１】この発明の実施例１を示すフローシートであ
る。FIG. 1 is a flow sheet showing a first embodiment of the present invention.
【図２】この発明の実施例２を示すフローシートであ
る。FIG. 2 is a flow sheet showing a second embodiment of the present invention.
１：蒸溜塔 ２：再沸器 ３：冷却器 ４：蒸発器 ５：効用ポンプ ６：純水ポンプ ７：真空装置 ８：凝集沈殿装置 ９：膜分離装置 1: Distillation tower 2: Reboiler 3: Cooler 4: Evaporator 5: Effect pump 6: Pure water pump 7: Vacuum device 8: Coagulation sedimentation device 9: Membrane separation device
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０２Ｆ 9/00 Ｅ Ｂ ５０３ Ｃ (72)発明者 平野 隆 大阪市此花区西九条５丁目３番28号 日立 造船株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Reference number within the agency FI Technical display location C02F 9/00 EB 503 C (72) Inventor Takashi Hirano 5-3, Nishikujo, Konohana-ku, Osaka No. 28 Hitachi Shipbuilding Co., Ltd.
Claims (2)
む廃水から純水を回収するシステムにおいて、蒸溜塔と
その後流の蒸発法純水装置とからなることを特徴とす
る、廃水からの純水回収システム。1. A system for recovering pure water from wastewater containing organic matter discharged from a synthetic resin molding step, characterized by comprising a distillation column and a downstream pure water device by an evaporation method. Recovery system.
む廃水から純水を回収するシステムにおいて、凝集沈殿
装置および／または膜分離装置によって樹脂成分を除去
する前処理装置とその後流の蒸溜塔とその後流の蒸発法
純水装置とからなることを特徴とする、廃水からの純水
回収システム。2. In a system for recovering pure water from wastewater containing organic substances emitted from a synthetic resin molding step, a pretreatment device for removing a resin component by a coagulation-sedimentation device and / or a membrane separation device, and a distilling tower of a subsequent flow. A pure water recovery system from waste water, comprising a subsequent-flow evaporation method pure water device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6305775A JPH08155434A (en) | 1994-12-09 | 1994-12-09 | System for recovery of pure water from waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6305775A JPH08155434A (en) | 1994-12-09 | 1994-12-09 | System for recovery of pure water from waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08155434A true JPH08155434A (en) | 1996-06-18 |
Family
ID=17949204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6305775A Withdrawn JPH08155434A (en) | 1994-12-09 | 1994-12-09 | System for recovery of pure water from waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08155434A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2391227A (en) * | 2002-06-18 | 2004-02-04 | Sasol Technology | Method of purifying Fischer-Tropsch derived water |
| JP2013010084A (en) * | 2011-06-30 | 2013-01-17 | Hitachi Ltd | Water purification process and water purifying apparatus thereof |
| CN110950476A (en) * | 2019-12-03 | 2020-04-03 | 广东益诺欧环保股份有限公司 | Treatment method and treatment system for high-salinity wastewater containing methanol |
-
1994
- 1994-12-09 JP JP6305775A patent/JPH08155434A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2391227A (en) * | 2002-06-18 | 2004-02-04 | Sasol Technology | Method of purifying Fischer-Tropsch derived water |
| GB2391227B (en) * | 2002-06-18 | 2005-10-26 | Sasol Technology | Method of purifying fischer-tropsch derived water |
| JP2013010084A (en) * | 2011-06-30 | 2013-01-17 | Hitachi Ltd | Water purification process and water purifying apparatus thereof |
| CN110950476A (en) * | 2019-12-03 | 2020-04-03 | 广东益诺欧环保股份有限公司 | Treatment method and treatment system for high-salinity wastewater containing methanol |
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