JP2001070989A - Method and apparatus for treating organic wastewater containing high concentration of salts - Google Patents
Method and apparatus for treating organic wastewater containing high concentration of saltsInfo
- Publication number
- JP2001070989A JP2001070989A JP25326699A JP25326699A JP2001070989A JP 2001070989 A JP2001070989 A JP 2001070989A JP 25326699 A JP25326699 A JP 25326699A JP 25326699 A JP25326699 A JP 25326699A JP 2001070989 A JP2001070989 A JP 2001070989A
- Authority
- JP
- Japan
- Prior art keywords
- treatment
- reverse osmosis
- electrodialysis
- salts
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高濃度の塩類を含
有する有機性廃水からその塩類を脱塩し、有機物を除去
する処理方法に関するものであり、特にごみ埋立浸出水
やし尿などのような塩類濃度の高い有機性廃水の高度処
理、脱塩処理、塩類物質の濃縮回収、処理水の回収・再
利用などに用いることができる処理方法に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for desalinating organic wastewater containing high concentrations of salts and removing organic substances, and particularly to a method for removing organic matter from landfill leachate and human waste. The present invention relates to a treatment method that can be used for advanced treatment, desalination treatment, concentration and recovery of salt substances, recovery and reuse of treated water, etc., with high salt concentration.
【０００２】[0002]
【従来の技術】ごみ埋立浸出水などの塩類濃度が高い有
機性廃水は、一般に、カルシウムイオンなどの塩類や有
機物などの汚濁物質を高濃度に含んでいる。しばしば、
生化学的酸素要求量（ＢＯＤ）や化学的酸素要求量（Ｃ
ＯＤ）が高く、多くの懸濁物質（ＳＳ）を含み、さらに
コロイド物質などに原因する色度を有している。そのた
め、通常これらを何らかの用途に直接再利用したり河川
などに直接放流したりすることはできない。このような
有機性廃水の処理方法としては、従来では、有機汚濁物
の除去を主体とした処理方法が用いられている。主な処
理方法としては、例えば、ＢＯＤ除去を目的とした生物
処理、色度、ＣＯＤ及びＳＳなどの除去を目的とした凝
集沈殿処理、ＳＳなど濁質の除去を目的とした砂濾過や
精密濾過膜（ＭＦ膜）処理がある。さらに、高度処理方
法として一般的にオゾンや活性炭を用いる方法などがあ
る。2. Description of the Related Art Organic wastewater having a high salt concentration, such as leachate from landfills, generally contains high concentrations of pollutants such as salts such as calcium ions and organic substances. often,
Biochemical oxygen demand (BOD) or chemical oxygen demand (C
OD), contains many suspended substances (SS), and has a chromaticity caused by colloid substances and the like. For this reason, they cannot usually be directly reused for some purpose or directly discharged to rivers. As a method for treating such organic wastewater, a treatment method mainly for removing organic pollutants has been conventionally used. The main treatment methods include, for example, biological treatment for removing BOD, coagulation sedimentation treatment for removing chromaticity, COD and SS, sand filtration and microfiltration for removing turbidity such as SS. There is a film (MF film) treatment. Further, as an advanced treatment method, there is generally a method using ozone or activated carbon.
【０００３】[0003]
【発明が解決しようとする課題】前記した有機性廃水の
処理方法においては、それらの処理を組み合わせること
により、ＢＯＤ、ＣＯＤなどの有機性成分を十分に除去
することができるような技術水準に達している。しか
し、有機性廃水は一般に有機物の他にも様々な塩類を含
んでおり、場合によってはかなり高い濃度の塩類を含有
する場合がある。このような廃水を処理して河川などに
放水する場合には、放流水域の水質保護、あるいは農業
用水への影響も考慮しなければならず、近来、有機汚濁
成分だけでなく特にそのような塩類も廃水中から一緒に
除去する必要性が高まってきている。従来の有機性廃水
の浄化方法は、いずれも主にその中の有機汚濁成分を除
去することを目的としているため、塩類を除去する効果
がなく、その処理水の塩類濃度は流入原水とほぼ同程度
となっている。In the above-mentioned method for treating organic wastewater, a combination of these treatments has reached a state of the art in which organic components such as BOD and COD can be sufficiently removed. ing. However, organic wastewater generally contains a variety of salts in addition to organic matter, and in some cases can contain significantly higher concentrations of salts. When treating such wastewater and discharging it to rivers, etc., it is necessary to consider the impact on the water quality protection of the discharge water area and agricultural water, and recently, not only organic pollutants but also such salts There is an increasing need to remove them together from wastewater. Since the conventional methods of purifying organic wastewater are mainly intended to remove organic pollutants therein, there is no effect of removing salts, and the salt concentration of the treated water is almost the same as that of the influent raw water. It has become about.
【０００４】塩類を含む水相中から塩類を除去する処理
方法はそれ自体では良く知られている技術であって、例
えば逆浸透法、電気透析法、蒸発法などをあげることが
できる。逆浸透法の場合、効率は塩類水の塩類濃度に左
右されるという欠点がある。塩類水の濃度が高い場合に
は脱塩水の回収率は低い。例えば、３．５ｗｔ％ＮａＣ
ｌ水溶液を脱塩処理する場合、処理圧力を６０ｋｇｆ／
ｃｍ2 としても、水回収率は高くても３５〜４０％であ
る。水の回収率を５０％以上にするには操作圧力を７０
ｋｇｆ／ｃｍ2 以上にしなけれはならない。しかし、こ
のような圧力では、処理コストの増加となるだけでな
く、逆浸透処理装置の寿命などを考えるとその限界があ
る。さらに、塩類水が高い濃度でカルシウムイオンを含
んでいると半透膜表面にカルシウムスケールが析出する
危険性がある。塩類濃度が比較的低くても、半透膜表面
でのカルシウムスケールの析出により透過水量の低下で
処理水の高い回収率での処理が困難となる。A treatment method for removing salts from an aqueous phase containing salts is a well-known technique per se, and examples thereof include a reverse osmosis method, an electrodialysis method, and an evaporation method. In the case of the reverse osmosis method, there is a disadvantage that the efficiency depends on the salt concentration of the salt water. When the concentration of saline water is high, the recovery rate of demineralized water is low. For example, 3.5 wt% NaC
When desalting an aqueous solution, the processing pressure is 60 kgf /
The water recovery rate is at most 35-40% in cm 2 . To achieve a water recovery of 50% or more, the operating pressure should be 70
It must be at least kgf / cm 2 . However, such a pressure not only increases the processing cost, but also has a limit in consideration of the life of the reverse osmosis treatment apparatus and the like. Further, when the salt water contains calcium ions at a high concentration, there is a risk that calcium scale is deposited on the surface of the semipermeable membrane. Even when the salt concentration is relatively low, the amount of permeated water decreases due to the precipitation of calcium scale on the surface of the semipermeable membrane, and it becomes difficult to treat the treated water at a high recovery rate.
【０００５】電気透析法では、基本的に水の回収率を高
く得ることができる。しかし、電気透析される被処理水
がカルシウムイオンを高い濃度で含んでいる場合にはカ
ルシウムスケールが装置内に析出する。特に、電気透析
法では、陽極からの水素イオン及び陰極からの水酸イオ
ンの移動に伴うｐＨ変化などによりカルシウムスケール
が生成しやすい。カルシウムスケールが析出すれば水を
高い回収率を得ることができない点は、逆浸透法の場合
と同様である。しかも、この方法ではＣＯＤなどの有機
物を除去することができないため、良質の処理水を得る
ためには活性炭処理法などの他の処理法による有機物の
除去が必要となる。また、蒸発法は、系の相変化を伴う
方法であるため、必要エネルギーが大きく、処理コスト
を非常に増大させるという問題点がある。さらに、廃水
が揮発性の有機物やアンモニア性窒素（ＮＨ4 −Ｎ）な
どを含んでいればそれらも処理水中に混入することがあ
り、良質な処理水は得にくいという問題点もある。[0005] In the electrodialysis method, basically, a high water recovery rate can be obtained. However, if the water to be electrodialyzed contains calcium ions at a high concentration, calcium scale precipitates in the apparatus. In particular, in the electrodialysis method, calcium scale is easily generated due to a change in pH caused by the movement of hydrogen ions from the anode and hydroxyl ions from the cathode. As with the case of the reverse osmosis method, a high water recovery rate cannot be obtained if calcium scale is precipitated. In addition, since organic matter such as COD cannot be removed by this method, it is necessary to remove organic matter by another treatment method such as an activated carbon treatment method in order to obtain high quality treated water. Further, since the evaporation method involves a phase change of the system, there is a problem that the required energy is large and the processing cost is greatly increased. Furthermore, if the wastewater contains volatile organic substances, ammoniacal nitrogen (NH 4 —N), etc., these may be mixed into the treated water, and there is a problem that it is difficult to obtain high-quality treated water.
【０００６】しかも、上記の軟化処理、生物処理、凝集
処理、砂濾過処理、精密濾過膜処理のいずれによっても
金属、特に重金属類を有効に除去できなく、重金属を有
効に除去するためには、水中の金属イオンと選択的かつ
強力な錯形成を行う、キレート樹脂による吸着によらな
ければならなく、さもなければ逆浸透膜処理または電気
浸透処理により濃縮した回収塩に重金属が含まれてしま
うという問題点もあった。Furthermore, metals, especially heavy metals, cannot be effectively removed by any of the above-mentioned softening treatment, biological treatment, coagulation treatment, sand filtration treatment, and microfiltration membrane treatment. Selective and complex formation with metal ions in water must be achieved by chelating resin adsorption, otherwise heavy metals will be contained in the recovered salt concentrated by reverse osmosis membrane treatment or electroosmosis treatment There were also problems.
【０００７】本発明は、このような従来の課題に鑑みて
なされたものであり、塩類を高い濃度で含む有機性廃水
を処理して、再利用したり河川などに直接放流すること
ができる程度にまで効率よく浄化する際に、有機性成分
を十分除去できるだけではなく、塩類を十分に除去する
ことができ、かつその処理に際してカルシウムスケール
の析出などの処理効果を低下させるという問題を起こさ
ないで、浄化を行い、塩濃度の低い重金属を含まない処
理水を高い効率で得ることができると共に回収した塩分
も再資源化できる方法を提供することを目的とするもの
である。[0007] The present invention has been made in view of such a conventional problem, and is intended to treat an organic wastewater containing a high concentration of salts so that the wastewater can be reused or discharged directly to a river or the like. When efficiently purifying, it is possible to not only sufficiently remove the organic components, but also sufficiently remove the salts, and at the time of the treatment, without causing a problem that the treatment effect such as precipitation of calcium scale is reduced. It is an object of the present invention to provide a method that can purify and obtain a treated water having a low salt concentration and containing no heavy metal with high efficiency and can also recycle recovered salt.
【０００８】[0008]
【課題を解決するための手段】前記したように、キレー
ト樹脂は重金属含有廃水処理分野において、最も進んだ
三次処理技術として広く利用されている。本発明者等
は、このような重金属吸着技術と、従来の高濃度の塩類
を含有する有機性廃水の処理方法に用いられている各種
分離技術の組み合わせについて検討を行い、逆浸透膜と
電気透析膜を使用する膜分離手段の前後いずれかに重金
属類吸着手段を配置することにより、重金属類を有効に
吸着分離できることを見いだし、本発明を完成するに至
った。As described above, chelating resins are widely used as the most advanced tertiary treatment technology in the field of treating wastewater containing heavy metals. The present inventors studied a combination of such heavy metal adsorption technology and various separation technologies used in a conventional method for treating organic wastewater containing high concentrations of salts, and studied reverse osmosis membrane and electrodialysis. By arranging the heavy metal adsorption means before or after the membrane separation means using a membrane, it has been found that heavy metals can be effectively adsorbed and separated, and the present invention has been completed.
【０００９】すなわち、本発明は、下記の有機性廃水の
処理方法及びその装置により、上記課題を解決した。 （１）高濃度の塩類を含有する有機性廃水に軟化処理を
行ってその中のカルシウム濃度を低下させた後、生物処
理、凝集処理、砂濾過処理、精密濾過膜処理よりなる群
から選ばれる１以上の処理または２以上の組み合わせか
らなる処理を行い、次いで逆浸透膜及び／または電気透
析膜により脱塩処理を行い、さらに残留する逆浸透膜濃
縮水又は電気透析膜濃縮水を蒸発乾燥処理して固形物と
して回収する有機性廃水の処理方法において、逆浸透膜
及び／または電気透析膜により脱塩処理を行う前、又は
該脱塩処理を行った後に重金属除去の処理を行い、重金
属を含まない塩分を固形物として回収することを特徴と
する高濃度の塩類を含有する有機性廃水の処理方法。 （２）重金属除去の処理として、キレート樹脂による吸
着処理を行うことを特徴とする前記（１）記載の高濃度
の塩類を含有する有機性廃水の処理方法。That is, the present invention has solved the above-mentioned problems by the following method and apparatus for treating organic wastewater. (1) After softening the organic wastewater containing a high concentration of salts to reduce the calcium concentration therein, the wastewater is selected from the group consisting of biological treatment, coagulation treatment, sand filtration treatment, and microfiltration membrane treatment. A treatment comprising one or more treatments or a combination of two or more treatments is carried out, and then a desalination treatment is carried out by a reverse osmosis membrane and / or an electrodialysis membrane. In the method for treating organic wastewater that is recovered as a solid matter, a heavy metal removal treatment is performed before or after the desalination treatment is performed by a reverse osmosis membrane and / or an electrodialysis membrane to remove heavy metals. A method for treating organic wastewater containing a high concentration of salts, wherein the salt-free material is recovered as a solid. (2) The method for treating organic wastewater containing high-concentration salts according to the above (1), wherein the treatment for removing heavy metals is an adsorption treatment using a chelate resin.
【００１０】（３）高濃度の塩類を含有する有機性廃水
を処理して重金属を含まない塩分を固形物として回収す
る廃水処理装置において、有機性廃水を供給する被処理
水流入管１を接続した軟化処理装置２と、その排出側に
生物処理装置３、次いで凝集精密濾過装置４、更に重金
属除去装置５と、その排出側に逆浸透処理透過水排水管
７を設けた逆浸透処理装置６と、その濃縮水排出側に逆
浸透処理装置６への電気透析脱塩処理水戻し管９を設け
た電気透析処理装置８と、その濃縮水排出側に重金属を
含まない塩分を固形物にするための蒸発乾燥処理装置１
０を具備していることを特徴とする塩分を回収するため
の廃水処理装置。 （４）高濃度の塩類を含有する有機性廃水を処理して重
金属を含まない塩分を固形物として回収する廃水処理装
置において、有機性廃水を供給する被処理水流入管１１
を接続した軟化処理装置１２と、その排出側に生物処理
装置１３、更に凝集精密濾過装置１４と、その排出側に
逆浸透処理透過水排水管１６を設けた逆浸透処理装置１
５と、その濃縮水排出側に逆浸透処理装置１５への電気
透析脱塩処理水戻し管１８を設けた電気透析処理装置１
７と、その濃縮水排出側に重金属除去装置１９、更に重
金属を含まない塩分を固形物にするための蒸発乾燥処理
装置２０を具備していることを特徴とする塩分を回収す
るための廃水処理装置。(3) In a wastewater treatment apparatus for treating organic wastewater containing high concentrations of salts and recovering salts containing no heavy metals as solids, a treated water inflow pipe 1 for supplying organic wastewater is connected. A softening treatment device 2, a biological treatment device 3 on the discharge side thereof, a coagulation microfiltration device 4, a heavy metal removal device 5, and a reverse osmosis treatment device 6 provided with a reverse osmosis treatment permeated water drainage pipe 7 on the discharge side. An electrodialysis treatment apparatus 8 provided with an electrodialysis desalination treatment water return pipe 9 to a reverse osmosis treatment apparatus 6 on the concentrated water discharge side, and a solid matter containing no heavy metal on the concentrated water discharge side. Evaporative drying treatment equipment 1
A wastewater treatment apparatus for recovering salt, which is characterized by comprising: (4) A treated water inflow pipe 11 for supplying organic wastewater in a wastewater treatment apparatus that treats organic wastewater containing high concentrations of salts and recovers salts containing no heavy metals as solids.
, A biological treatment device 13 on the discharge side thereof, a coagulation microfiltration device 14, and a reverse osmosis treatment permeated water drainage pipe 16 on the discharge side.
5 and an electrodialysis treatment apparatus 1 provided with an electrodialysis desalination treatment water return pipe 18 to a reverse osmosis treatment apparatus 15 on the concentrated water discharge side.
Wastewater treatment for recovering salt, characterized by comprising a heavy metal removal device 19 on the discharge side of the concentrated water, and an evaporative drying treatment device 20 for converting heavy metal-free salt into solids. apparatus.
【００１１】[0011]
【発明の実施の形態】次に、本発明の実施の形態を図面
により説明する。図１は、本発明にかかる請求項１の廃
水の処理方法を行う処理装置の一実施態様を示す概略図
である。図１に示す有機性廃水の処理装置は、前記有機
性廃水を供給する被処理水流入管１を接続した軟化処理
装置２を設け、その排出側に生物処理装置３、さらに凝
集精密濾過装置４（図中では「凝集ＭＦ濾過装置４」と
表示してある）を設けてある。前記凝集精密濾過装置４
は、生物処理装置３内又はそれから排出される生物処理
水に無機凝集剤等を添加して凝集物を生成された水を精
密濾過膜（ＭＦ膜）により濾過する装置である。凝集精
密濾過装置４の濾過処理水配管の出口は重金属除去装置
５であるキレート樹脂塔へ接続され、更に、その処理水
配管の出口は逆浸透処理装置６に開口している。Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing an embodiment of a treatment apparatus for performing the wastewater treatment method of claim 1 according to the present invention. The organic wastewater treatment apparatus shown in FIG. 1 is provided with a softening treatment apparatus 2 connected to a treated water inflow pipe 1 for supplying the organic wastewater, a biological treatment apparatus 3 on the discharge side, and a coagulation microfiltration apparatus 4 ( In the figure, “Aggregation MF filtration device 4” is provided). Coagulation microfiltration device 4
Is a device that adds an inorganic coagulant or the like to biologically treated water discharged from or inside the biological treatment device 3 and filters water generated as an aggregate through a microfiltration membrane (MF membrane). The outlet of the filtration water pipe of the coagulation microfiltration device 4 is connected to a chelate resin tower which is a heavy metal removing device 5, and the outlet of the water pipe of the treatment is open to the reverse osmosis treatment device 6.
【００１２】この逆浸透処理装置６からは逆浸透濃縮水
管と逆浸透処理透過水排水管７とが別々に出ている。逆
浸透処理装置６からの逆浸透濃縮水配管は電気透析処理
装置８に延びている。この電気透析処理装置８からは更
に電気透析濃縮水配管と電気透析脱塩処理水戻し管とが
別々に延び、電気透析脱塩処理水戻し管９はその出口を
前記逆浸透処理装置６への配管に連結しており、その電
気透析濃縮水配管は蒸発乾燥処理装置１０に至ってい
る。From the reverse osmosis treatment apparatus 6, a reverse osmosis concentrated water pipe and a reverse osmosis treated permeated water drain pipe 7 are separately provided. The reverse osmosis concentrated water piping from the reverse osmosis treatment device 6 extends to the electrodialysis treatment device 8. The electrodialysis treatment device 8 further includes an electrodialysis concentrated water pipe and an electrodialysis desalination water return tube separately extending from the electrodialysis treatment water return tube 9. The electrodialysis concentrated water pipe is connected to a pipe, which leads to the evaporative drying treatment apparatus 10.
【００１３】また、図２は、本発明にかかる請求項４の
廃水処理方法を行う処理装置の一実施態様を示す概略図
である。図２に示す有機性廃水の処理装置は、前記図１
の装置とは重金属除去装置の配置が、逆浸透処理及び電
気透析処理を含めた膜分離処理の前後逆配置になってい
る点が相違しているだけであるから、その重ねての説明
は省略する。FIG. 2 is a schematic diagram showing an embodiment of a treatment apparatus for performing the wastewater treatment method according to claim 4 of the present invention. The organic wastewater treatment apparatus shown in FIG.
The only difference is that the arrangement of the heavy metal removal device is reversed before and after the membrane separation treatment including the reverse osmosis treatment and the electrodialysis treatment. I do.
【００１４】本発明では、その処理の対象とする有機性
廃水としては、有機性成分としてはそれほど高くないも
のでも処理できるものであって、有機性成分が電気透析
処理にまで入ると悪影響を及ぼすので、それを逆浸透処
理において除去することができる。また、その有機性廃
水中の塩類濃度については、かならずしも著しく高い濃
度のものを対象とするものではなく、前記したように放
流するには支障となる程度に高い濃度のもの、乃至はそ
れよりも高い濃度のものを対象とするに適しているもの
である。本発明の有機性廃水の処理方法は、このような
装置を使用して例えば次のようにして実施するとよい。
高い濃度で塩類を含有する有機性廃水を被処理水流入管
１から軟化処理装置２に導入して軟化処理を行う。軟化
処理は、例えば、石灰ソーダ軟化法やイオン交換硬水軟
化法によって水中のカルシウムやマグネシウムの硬水成
分（難溶塩形成成分）をナトリウムのような易溶性形成
成分に置換するような方法で行うことができる。この軟
化処理により、逆浸透処理装置６あるいは電気透析処理
装置８でカルシウムスケールが発生することを効果的に
防止することができる。In the present invention, the organic wastewater to be treated can be treated even if it is not so high as an organic component. If the organic component enters the electrodialysis treatment, it has an adverse effect. So it can be removed in the reverse osmosis treatment. In addition, the salt concentration in the organic wastewater is not always intended to be a remarkably high concentration, but as described above, a concentration high enough to hinder the discharge, or a higher concentration. It is suitable for high concentration objects. The method for treating organic wastewater of the present invention may be implemented using such an apparatus, for example, as follows.
An organic wastewater containing salts at a high concentration is introduced into the softening treatment device 2 from the treated water inflow pipe 1 to perform a softening treatment. The softening treatment is performed, for example, by replacing a hard water component (a hardly soluble salt forming component) of calcium or magnesium in water with a readily soluble forming component such as sodium by a lime soda softening method or an ion exchange soft water softening method. Can be. By this softening treatment, generation of calcium scale in the reverse osmosis treatment device 6 or the electrodialysis treatment device 8 can be effectively prevented.
【００１５】このようにしてカルシウムイオンを除去し
た廃水は、次いで生物処理装置３、凝集精密濾過装置４
に導入し、有機汚濁物の多くを除去する。生物処理装置
３で行う生物処理方法としては、具体的には標準的な活
性汚泥法の他に、生物学的消化脱窒素法なども挙げるこ
とができる。これらの方法を利用することによりＢＯＤ
を低下させることができる。凝集精密濾過装置４で行う
凝集精密濾過（凝集ＭＦ膜濾過）処理方法としては、具
体的は、前記したように生物処理水に無機凝集剤を添加
して凝集させたものを精密濾過膜で濾過する、という方
法をあげることができる。このような方法を利用すると
特にＳＳなどの濁質を廃水中から除去することができ
る。The wastewater from which calcium ions have been removed in this way is then subjected to a biological treatment device 3, a coagulation microfiltration device 4
To remove most of the organic pollutants. Examples of the biological treatment method performed by the biological treatment device 3 include, in addition to the standard activated sludge method, a biological digestion and denitrification method. By using these methods, BOD
Can be reduced. As a method of the coagulation microfiltration (coagulation MF membrane filtration) performed by the coagulation microfiltration device 4, specifically, as described above, a biologically treated water obtained by adding an inorganic coagulant and coagulating is filtered through a microfiltration membrane. To do that. By using such a method, turbid substances such as SS can be particularly removed from wastewater.
【００１６】有機物の除去処理を施した前記廃水は、次
いで重金属除去装置５、続いて逆浸透処理装置６、更に
電気透析処理装置８に導き、塩類の除去処理を施す。こ
の電気透析処理装置８では、回分式あるいは連続式で処
理することができる。そして、上記の凝集精密濾過装置
４から重金属除去装置５に導き、工業用塩や融雪剤に有
害な重金属を除去し、そこから逆浸透処理装置６に導
き、ここで逆浸透処理を行う。逆浸透処理では、３Ｍｐ
ａ以上の機械的な圧力を加え、逆浸透濃縮水と逆浸透処
理水とに分離し、脱塩した逆浸透処理水は逆浸透処理水
配管７を通じて排出する。The wastewater subjected to the organic substance removal treatment is then guided to a heavy metal removal device 5, a reverse osmosis treatment device 6, and further to an electrodialysis treatment device 8, where salts are removed. The electrodialysis apparatus 8 can perform batch or continuous processing. Then, it is guided from the coagulation microfiltration device 4 to the heavy metal removing device 5 to remove heavy metals harmful to industrial salt and snow melting agent, and then guided to the reverse osmosis treatment device 6, where the reverse osmosis treatment is performed. In reverse osmosis treatment, 3Mp
A mechanical pressure equal to or higher than a is applied to separate the reverse osmosis concentrated water and the reverse osmosis treatment water, and the desalted reverse osmosis treatment water is discharged through the reverse osmosis treatment water pipe 7.
【００１７】この逆浸透処理を行うと、逆浸透濃縮水と
してその蒸発残留物成分濃度が高い高濃度塩類水とする
ことができ、廃水中の塩類を濃縮させることができて、
効率が良い。逆浸透濃縮水は、逆浸透処理装置６から電
気透析処理装置８に導入する。When this reverse osmosis treatment is carried out, high-concentration saline water having a high concentration of evaporation residue can be obtained as reverse osmosis concentrated water, and salts in wastewater can be concentrated.
Efficient. The reverse osmosis concentrated water is introduced from the reverse osmosis treatment device 6 to the electrodialysis treatment device 8.
【００１８】電気透析処理（「ＥＤ処理」ともいう）
は、多数の電気透析膜を配列し、交互に形成した濃縮室
と希釈室に逆浸透濃縮水を供給して、通電して濃縮室に
高濃度の電気透析濃縮水を得、希釈室に低濃度の電気透
析処理水を得るものである。電気透析処理は回分式に行
うとよい。回分式に行うと、脱塩した低濃度の電気透析
処理と電気透析濃縮水との塩類濃度比は１５０以上とす
ることができ、蒸発残留物成分濃度１３％以上（１３０
０００ｍｇ／リットル以上）の電気透析濃縮水を得るこ
とができる。回分式処理が連続式処理の場合よりも脱塩
率及び処理効率とも高い。この場合、電気透析濃縮水か
ら分離させた電気透析脱塩処理水では通常、９９％以上
の塩類が除かれ、塩類濃度は１０００ｍｇ／リットル以
下に低下する。Electrodialysis treatment (also called "ED treatment")
A large number of electrodialysis membranes are arranged, and reverse osmosis concentrated water is supplied to a concentration chamber and a dilution chamber which are alternately formed. This is for obtaining electrodialysis-treated water having a concentration. The electrodialysis treatment may be performed batchwise. When performed batchwise, the salt concentration ratio between the desalted low-concentration electrodialysis treatment and the electrodialysis concentrated water can be set to 150 or more, and the evaporation residue component concentration is 13% or more (130% or more).
000 mg / liter or more). Batch processing has higher desalination rate and processing efficiency than continuous processing. In this case, 99% or more of the salts are usually removed from the electrodialyzed desalted water separated from the electrodialysis concentrated water, and the salt concentration is reduced to 1000 mg / liter or less.
【００１９】電気透析脱塩処理水は電気透析脱塩処理水
戻し管９を通じて逆浸透処理装置６への配管に還流す
る。有機物の残存があれば逆浸透処理装置６で濾過され
る。電気透析濃縮水は電気透析濃縮水配管から蒸発乾燥
処理装置１０に導き、蒸発乾燥処理することによって水
分と塩類とに分離し、塩類を単離する。以上により高い
濃度の逆浸透濃縮水を縮小した容積で回収できることに
なる。次いで、電気透析処理はこのような縮小した容積
の逆浸透濃縮水を対象として行う。The electrodialysis-desalted water returns to the pipe to the reverse osmosis treatment device 6 through the electrodialysis-desalted water return pipe 9. If any organic matter remains, it is filtered by the reverse osmosis treatment device 6. The electrodialysis concentrated water is led from the electrodialysis concentrated water pipe to the evaporative drying treatment device 10 and is separated into water and salts by evaporative drying to isolate the salts. As described above, a high concentration reverse osmosis concentrated water can be recovered in a reduced volume. The electrodialysis treatment is then performed on such a reduced volume of the reverse osmosis retentate.
【００２０】したがって、電気透析処理の量的負担は大
きくなく、続いて行う蒸発乾燥処理でも処理対象となる
水量は更に絞られる。相変化をともない大量のエネルギ
ーを要する蒸発乾燥処理であっても効率よく行うことが
でき、塩類成分を固形成分として容易に単離することが
できる。電気透析処理で生じた低濃度の電気透析脱塩処
理水は逆浸透処理装置６に還流させ、逆浸透処理水は逆
浸透処理により処理していることから、凝集精密濾過を
免れた微量の有機物が残存していたとしても逆浸透処理
水にそれが流れ込むことはほとんどない。上記の実施の
態様では有機物の除去にあたり、生物処理方法と凝集精
密濾過膜処理方法とを採用しているが、実際には有機物
の除去を十分に行うことができるならばその他の方法を
採用してもよい。例えば、凝集沈殿処理方法あるいは砂
濾過方法などを採用してもよい。凝集沈殿処理方法によ
ると色度やＳＳなどを除去し、ＣＯＤも下げることがて
きる。砂濾過方法によればＳＳなど濁質を除去すること
ができる。なお、図１では、逆浸透処理装置６と電気透
析処理装置８の両方を設けたものを示したが、逆浸透処
理装置６の前の段階で有機物の濃度が低いとか、あるい
は電気透析処理装置８の前の段階で塩類の濃度があまり
高くないということで、両方の装置を一緒に用いる必要
がない場合には、一方だけを使用するようにしてもよ
い。Therefore, the quantitative load of the electrodialysis treatment is not large, and the amount of water to be treated is further reduced in the subsequent evaporation and drying treatment. Evaporation drying treatment requiring a large amount of energy with a phase change can be performed efficiently, and the salt component can be easily isolated as a solid component. Electrodialysis desalted water of low concentration generated in the electrodialysis treatment is refluxed to the reverse osmosis treatment device 6, and the reverse osmosis treatment water is treated by the reverse osmosis treatment. Even if it remains, it hardly flows into the reverse osmosis treated water. In the above embodiment, a biological treatment method and a coagulation microfiltration membrane treatment method are employed for removing organic substances, but other methods are employed in practice if organic substances can be sufficiently removed. You may. For example, a coagulation sedimentation method or a sand filtration method may be employed. According to the coagulation-sedimentation method, chromaticity and SS are removed, and COD can be reduced. According to the sand filtration method, turbid substances such as SS can be removed. Although FIG. 1 shows the case where both the reverse osmosis treatment device 6 and the electrodialysis treatment device 8 are provided, the concentration of organic matter is low before the reverse osmosis treatment device 6 or the electrodialysis treatment device If it is not necessary to use both devices together because the salt concentration is not too high in the stage prior to step 8, only one may be used.
【００２１】上記の説明は、図１に示す工程について詳
細に記述したが、図２に示す工程も先に述べたように、
重金属除去装置の配置個所を膜分離処理工程の前にした
か、後にしたかの違いにすぎないから、その詳細な説明
の重複を省略する。In the above description, the process shown in FIG. 1 has been described in detail. However, the process shown in FIG.
Since the location of the heavy metal removal device is only before or after the membrane separation process, the detailed description thereof will not be repeated.
【００２２】次に、本発明は、先に述べたように、塩濃
度の低い処理水を高い効率で得るだけでなく、回収した
塩分の再資源化も主目的とするものであるから、この点
について以下に詳細に説明する。回収した塩の再利用の
用途としては、工業塩及び融雪剤が考えられる。その
際、重金属が含まれていると、重金属が有害物であるた
め、そのままでは再利用できない。そこで、重金属の除
去が必須不可決の問題となっている。Next, as described above, the present invention aims not only to obtain treated water having a low salt concentration with high efficiency but also to recycle recovered salt, and This will be described in detail below. Industrial salt and snow melting agents can be used for the reuse of the recovered salt. At that time, if a heavy metal is contained, the heavy metal is a harmful substance and cannot be reused as it is. Therefore, removal of heavy metals has become an indispensable problem.
【００２３】ところで、キレート樹脂の特徴は、重金属
を含む特定の金属に対して高い選択的捕捉性能を持つこ
とと、低濃度溶液からも良好な捕捉性能を示すことであ
る。しかして、高濃度の塩類を含有する有機性廃水の処
理方法において、被処理水を前処理後、逆浸透処理、電
気透析処理で濃縮し、更に蒸発乾燥処理で固形物とする
と、被処理水に含まれている微量の重金属が固形物中に
含まれ、固形物を再利用し難い。このため、塩分の濃縮
前にキレート樹脂での吸着処理等より、重金属を除去し
た後に濃縮を行うことにより、重金属を含まない塩分を
固形物として得られる。また、逆浸透処理、電気透析処
理で濃縮後、蒸発乾燥前にキレート樹脂での吸着処理等
により、重金属を除去した後に蒸発乾燥を行うことによ
り、重金属を含まない塩分を固形物として得られる。す
なわち、本発明は、キレート樹脂の前記の特徴をいかし
て、回収塩分の重金属除去を達成し、回収塩分固形物の
再利用化に成功したのである。By the way, the characteristics of the chelate resin are that it has high selective capturing performance for specific metals including heavy metals, and that it exhibits good capturing performance even from a low concentration solution. Thus, in the method for treating organic wastewater containing high concentrations of salts, if the water to be treated is pretreated, concentrated by reverse osmosis treatment, electrodialysis treatment, and further solidified by evaporative drying treatment, A trace amount of heavy metal contained in the solid is contained in the solid, and it is difficult to reuse the solid. For this reason, the heavy metal-free salt is obtained as a solid by removing the heavy metal and performing concentration by adsorption treatment with a chelating resin or the like before the salt is concentrated. Further, after concentration by reverse osmosis treatment and electrodialysis treatment, heavy metal is removed by evaporative drying after removing heavy metals by adsorption treatment with a chelating resin before evaporative drying, etc., so that heavy metal-free salts can be obtained as solids. That is, in the present invention, by utilizing the above-mentioned characteristics of the chelate resin, heavy metal removal of the recovered salt was achieved, and the solid recovered solid was successfully reused.
【００２４】なお、キレート樹脂による重金属の除去方
法としては、キレート樹脂塔での吸着処理と、液体キレ
ート樹脂による凝集沈殿処理が考えられる。キレート樹
脂による各種金属類の除去可能な濃度（ｍｇ／リット
ル）は以下のようであることが知られている。 金属の種類 濃度 Ｆｅ ＜０．１ Ｍｎ ＜０．１ Ｚｎ ＜０．１ Ｃｕ ＜０．０５ Ｔ−Ｃｒ ＜０．１ Ｐｂ ＜０．１ Ｃｄ ＜０．０５As a method for removing heavy metals with a chelate resin, an adsorption treatment in a chelate resin tower and a coagulation-sedimentation treatment with a liquid chelate resin can be considered. It is known that the concentrations (mg / liter) at which various metals can be removed by the chelating resin are as follows. Kind of metal Concentration Fe <0.1 Mn <0.1 Zn <0.1 Cu <0.05 T-Cr <0.1 Pb <0.1 Cd <0.05
【００２５】回収塩分固形物の用途としての工業塩とし
ては、ソーダ工業での利用の外に陶磁器のウワグスリ、
せっけんの塩析、寒剤などの用途がある。ソーダ工業で
利用する回収塩は、ＮａＣｌとして高い純度が要求され
る。工業塩の目標組成値は、以下のように示される（含
有量はｍｇ／ｋｇで表す）。 組成成分 含有量 Ｎａ ３７８，０００〜３８９，０００ Ｋ １００〜３００ Ｃａ ２００〜１２００ Ｍｇ １００〜５００ Ｃｌ ５８６，０００〜５９９，０００ ＳＯ4 １，０００〜３，２００As the industrial salt for use of the recovered salt solids, in addition to the use in the soda industry, porpoise of ceramics,
Applications include salting out soap and cryogens. The recovered salt used in the soda industry is required to have high purity as NaCl. The target composition value of the industrial salt is shown as follows (content is expressed in mg / kg). Composition Component Content Na 378,000-389,000 K 100-300 Ca 200-1200 Mg 100-500 Cl 586,000-599,000 SO 4 1,000-3,200
【００２６】[0026]
【実施例】以下、実施例に基づいて本発明を具体的に説
明するが、本発明はこれらの実施例によって制限されな
い。EXAMPLES Hereinafter, the present invention will be described specifically with reference to Examples, but the present invention is not limited by these Examples.
【００２７】実施例１ 図１に示す有機性廃水の処理装置を用い、高濃度塩類を
含有する有機性廃水を処理した。すなわち、ごみ埋立地
浸出排水の処理を行い、含有する溶解性物質を固形物と
して分離した。重金属処理装置としてのキレート樹脂塔
での吸着後の処理水（「重金属処理水」）と蒸発乾燥処
理後の固形物のそれぞれの成分分析を行った。測定結果
を第１表に示す。第１表の結果から、銅、クロム、鉛、
カドミウム、亜鉛等の重金属の含有量が少なくなり、回
収塩を工業塩として再利用できることがわかる。Example 1 Organic wastewater containing high concentrations of salts was treated using the organic wastewater treatment apparatus shown in FIG. That is, the wastewater discharged from the landfill was treated and the contained soluble substances were separated as solids. Each component analysis of the treated water ("heavy metal treated water") after adsorption in the chelate resin tower as the heavy metal treatment device and the solid after the evaporation and drying treatment was performed. Table 1 shows the measurement results. From the results in Table 1, copper, chromium, lead,
It can be seen that the content of heavy metals such as cadmium and zinc is reduced, and the recovered salt can be reused as an industrial salt.
【００２８】[0028]
【表１】 [Table 1]
【００２９】比較例１ 図１に示す処理装置のうち、キレート樹脂塔を通さず
に、ごみ埋立地浸出排水の処理を行い、含有する溶解生
物質を固形物として分離した。固形物中の成分の濃度を
第２表に示す。第２表によれば、実施例１と比較して、
銅、クロム、鉛、亜鉛等の重金属の含有量が多く、回収
塩の工業塩としての再利用が難しいことがわかる。COMPARATIVE EXAMPLE 1 In the treatment apparatus shown in FIG. 1, wastewater discharged from a landfill was treated without passing through a chelating resin tower, and contained dissolved biomaterials were separated as solids. Table 2 shows the concentrations of the components in the solid. According to Table 2, compared to Example 1,
It is understood that the content of heavy metals such as copper, chromium, lead, and zinc is large, and it is difficult to reuse the recovered salt as an industrial salt.
【００３０】[0030]
【表２】 [Table 2]
【００３１】実施例２ 図２に示す有機性排水の処理装置を用い、実施例１と同
じごみ埋立地浸出廃水の処理を行い、含有する溶解性物
質を固形物として分離した。キレート樹脂塔での吸着後
の処理水（「重金属処理水」）と蒸発乾燥処理後の固形
物のそれぞれの成分分析を行った。測定結果を第３表に
示す。第３表の結果から、実施例１と同様に重金属の含
有量が少なくなり、回収塩を工業塩として再利用できる
ことがわかる。Example 2 Using the organic waste water treatment apparatus shown in FIG. 2, the same waste landfill leach wastewater as in Example 1 was treated, and the contained soluble substances were separated as solids. The components of the treated water after adsorption in the chelate resin tower ("heavy metal-treated water") and the solid matter after the evaporation and drying treatment were analyzed. Table 3 shows the measurement results. From the results in Table 3, it is understood that the content of the heavy metal is reduced as in Example 1, and the recovered salt can be reused as an industrial salt.
【００３２】[0032]
【表３】 [Table 3]
【００３３】[0033]
【発明の効果】本発明によれば、高濃度塩類を含有する
有機性廃水を軟化処理により予めカルシウム溶解濃度を
下げ、有機物の除去処理を行ってから逆浸透処理を施
し、及び／又は電気透析処理を施して脱塩処理を行い、
その逆浸透膜濃縮水又は電気透析濃縮水を蒸発乾固して
塩分を固形物として回収するに当たり、その脱塩処理の
前か又は後に重金属除去処理を行うことにより、重金属
の含有量がきわめて少ない回収塩を得て、工業塩の原料
として再利用することもできる。特に、逆浸透処理と電
気透析処理を組み合わせるときには、両方の処理におい
て高い効率が得られ、塩類の回収を有効に行うことがで
きる。逆浸透処理水の回収は逆浸透処理によって行って
いることから、有機物成分が含まれていても濾過されて
除かれ、処理水の中に漏洩することもほとんどない。し
かも、軟化処理を行っているので、両方の膜を使用する
処理においてカルシウムスケールの析出というトラブル
もなく、この方法によれば塩類を高い濃度で含む有機性
廃水を効率的に淡水化して再利用したり河川などに直接
放流することができる。According to the present invention, the organic wastewater containing high-concentration salts is subjected to a softening treatment to lower the concentration of dissolved calcium beforehand, to remove organic substances, and then to a reverse osmosis treatment, and / or to electrodialysis. Performing treatment and desalination,
In recovering salts as solids by evaporating the reverse osmosis membrane concentrated water or electrodialysis concentrated water to dryness, performing a heavy metal removal treatment before or after the desalination treatment has a very low heavy metal content. A recovered salt can be obtained and reused as a raw material for an industrial salt. In particular, when the reverse osmosis treatment and the electrodialysis treatment are combined, high efficiency is obtained in both treatments, and the salt can be effectively recovered. Since the reverse osmosis treatment water is collected by the reverse osmosis treatment, even if an organic component is contained, it is removed by filtration, and there is almost no leakage into the treated water. In addition, since the softening treatment is performed, there is no trouble of calcium scale precipitation in the treatment using both membranes. According to this method, organic wastewater containing a high concentration of salts is efficiently desalinated and reused. It can be discharged directly to dripping or rivers.
【図１】重金属除去装置を逆浸透処理装置の前に設けた
本発明の有機性廃水の処理装置の概略図である。FIG. 1 is a schematic diagram of an organic wastewater treatment apparatus of the present invention in which a heavy metal removal apparatus is provided in front of a reverse osmosis treatment apparatus.
【図２】重金属除去装置を電気透析処理装置の後に設け
た本発明の有機性廃水の処理装置の概略図である。FIG. 2 is a schematic diagram of an organic wastewater treatment apparatus of the present invention in which a heavy metal removal apparatus is provided after an electrodialysis treatment apparatus.
１ 被処理水流入管 ２ 軟化処理装置 ３ 生物処理装置 ４ 凝集精密膜濾過装置 ５ 重金属除去装置 ６ 逆浸透処理装置 ７ 逆浸透処理透過水排水管 ８ 電気透析処理装置 ９ 電気透析脱塩処理水戻し管 １０ 蒸発乾燥処理装置 １１ 被処理水流入管 １２ 軟化処理装置 １３ 生物処理装置 １４ 凝集精密膜濾過装置 １５ 逆浸透処理装置 １６ 逆浸透処理透過水排水管 １７ 電気透析処理装置 １８ 電気透析脱塩処理水戻し管 １９ 重金属除去装置 ２０ 蒸発乾燥処理装置 DESCRIPTION OF SYMBOLS 1 Inflow pipe of treated water 2 Softening equipment 3 Biological treatment equipment 4 Coagulation precision membrane filtration equipment 5 Heavy metal removal equipment 6 Reverse osmosis treatment equipment 7 Reverse osmosis treatment permeate drainage pipe 8 Electrodialysis treatment equipment 9 Electrodialysis desalination treatment water return pipe DESCRIPTION OF SYMBOLS 10 Evaporation drying processing apparatus 11 Inflow pipe of treated water 12 Softening processing apparatus 13 Biological processing apparatus 14 Coagulation precision membrane filtration apparatus 15 Reverse osmosis processing apparatus 16 Reverse osmosis processing permeated water drain pipe 17 Electrodialysis processing apparatus 18 Electrodialysis desalination processing water return Pipe 19 Heavy metal removal device 20 Evaporation drying treatment device
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０２Ｆ 9/00 ５０２ Ｃ０２Ｆ 9/00 ５０２Ｆ ５０２Ｇ ５０２Ｊ ５０２Ｌ ５０２Ｐ ５０２Ｚ ５０４ ５０４Ａ ５０４Ｅ 1/04 1/04 Ｄ 1/42 1/42 Ｈ 1/44 1/44 Ｆ 1/469 5/00 ６１０Ｃ 5/00 ６１０ 1/46 １０３ Ｆターム(参考） 4D006 GA05 GA07 GA17 JA71 KA01 KA03 KA53 KA72 KB11 KB12 KB14 KB21 KB30 KD08 KD17 PA01 PA02 PB08 PC61 PC80 4D025 AA09 AA10 AB18 AB21 AB22 AB23 AB25 AB28 BA17 BB01 DA02 DA05 DA06 DA10 4D034 AA16 AA26 BA01 CA12 4D061 DA08 DA10 DB13 EA09 EB02 EB12 FA02 FA06 FA08 FA09 FA13 FA14 FA15 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C02F 9/00 502 C02F 9/00 502F 502G 502J 502L 502P 502Z 504 504A 504E 1/04 1/04 D 1 / 42 1/42 H 1/44 1/44 F 1/469 5/00 610C 5/00 610 1/46 103 F term (reference) 4D006 GA05 GA07 GA17 JA71 KA01 KA03 KA53 KA72 KB11 KB12 KB14 KB21 KB30 KD08 KD17 PA01 PA02 PB08 PC61 PC80 4D025 AA09 AA10 AB18 AB21 AB22 AB23 AB25 AB28 BA17 BB01 DA02 DA05 DA06 DA10 4D034 AA16 AA26 BA01 CA12 4D061 DA08 DA10 DB13 EA09 EB02 EB12 FA02 FA06 FA08 FA09 FA13 FA14 FA15
Claims (4)
化処理を行ってその中のカルシウム濃度を低下させた
後、生物処理、凝集処理、砂濾過処理、精密膜濾過処理
よりなる群から選ばれる１以上の処理または２以上の組
み合わせからなる処理を行い、次いで逆浸透膜及び／ま
たは電気透析膜により脱塩処理を行い、さらに残留する
逆浸透膜濃縮水又は電気透析膜濃縮水を蒸発乾燥処理し
て固形物として回収する有機性廃水の処理方法におい
て、逆浸透膜及び／または電気透析膜により脱塩処理を
行う前、又は該脱塩処理を行った後に重金属除去の処理
を行い、重金属を含まない塩分を固形物として回収する
ことを特徴とする高濃度の塩類を含有する有機性廃水の
処理方法。1. An organic wastewater containing a high concentration of salts is subjected to a softening treatment to reduce the calcium concentration therein, and then a biological treatment, a coagulation treatment, a sand filtration treatment, and a precision membrane filtration treatment are performed. A treatment consisting of one or more treatments or a combination of two or more treatments is performed, and then a desalination treatment is performed with a reverse osmosis membrane and / or an electrodialysis membrane, and the remaining reverse osmosis membrane concentrate or electrodialysis membrane concentrate is evaporated. In a method for treating organic wastewater that is dried and recovered as a solid, before performing a desalination treatment with a reverse osmosis membrane and / or an electrodialysis membrane, or performing a heavy metal removal treatment after the desalination treatment, A method for treating organic wastewater containing high concentrations of salts, wherein the salt containing no heavy metal is recovered as a solid.
による吸着処理を行うことを特徴とする請求項１記載の
高濃度の塩類を含有する有機性廃水の処理方法。2. The method for treating organic wastewater containing high-concentration salts according to claim 1, wherein the treatment for removing heavy metals is an adsorption treatment using a chelating resin.
理して重金属を含まない塩分を固形物として回収する廃
水処理装置において、有機性廃水を供給する被処理水流
入管１を接続した軟化処理装置２と、その排出側に生物
処理装置３、次いで凝集精密膜濾過装置４、更に重金属
除去装置５と、その排出側に逆浸透処理透過水排水管７
を設けた逆浸透処理装置６と、その濃縮水排出側に逆浸
透処理装置６への電気透析脱塩処理水戻し管９を設けた
電気透析処理装置８と、その濃縮水排出側に重金属を含
まない塩分を固形物にするための蒸発乾燥処理装置１０
を具備していることを特徴とする塩分を回収するための
廃水処理装置。3. A wastewater treatment apparatus for treating an organic wastewater containing a high concentration of salts and recovering salts containing no heavy metals as solids, wherein a softened water connected to a treated water inflow pipe 1 for supplying the organic wastewater. Treatment device 2, biological treatment device 3 on the discharge side, then coagulation precision membrane filtration device 4, and heavy metal removal device 5, and reverse osmosis treatment permeated water drainage pipe 7 on the discharge side
A reverse osmosis treatment device 6 provided with a dialysis treatment device, an electrodialysis treatment device 8 provided with an electrodialysis desalination treatment water return pipe 9 to the reverse osmosis treatment device 6 on the concentrated water discharge side, and heavy metals on the concentrated water discharge side Evaporative drying treatment apparatus 10 for converting salt not containing into solid matter
A wastewater treatment apparatus for recovering salt content, comprising:
理して重金属を含まない塩分を固形物として回収する廃
水処理装置において、有機性廃水を供給する被処理水流
入管１１を接続した軟化処理装置１２と、その排出側に
生物処理装置１３、更に凝集精密膜濾過装置１４と、そ
の排出側に逆浸透処理透過水排水管１６を設けた逆浸透
処理装置１５と、その濃縮水排出側に逆浸透処理装置１
５への電気透析脱塩処理水戻し管１８を設けた電気透析
処理装置１７と、その濃縮水排出側に重金属除去装置１
９、更に重金属を含まない塩分を固形物にするための蒸
発乾燥処理装置２０を具備していることを特徴とする塩
分を回収するための廃水処理装置。4. A wastewater treatment apparatus for treating organic wastewater containing high-concentration salts and recovering heavy metal-free salts as solid matter, wherein a treated water inflow pipe 11 for supplying organic wastewater is connected. A treatment device 12, a biological treatment device 13 on the discharge side thereof, a coagulation precision membrane filtration device 14, a reverse osmosis treatment device 15 provided with a reverse osmosis treatment permeated water drainage pipe 16 on the discharge side thereof, and a concentrated water discharge side thereof. Reverse osmosis treatment equipment 1
5, an electrodialysis treatment device 17 provided with an electrodialysis desalination treatment water return pipe 18 to the heavy metal removal device 1
9. A wastewater treatment device for recovering salt, further comprising an evaporative drying treatment device 20 for converting salt that does not contain heavy metals into a solid substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25326699A JP3909793B2 (en) | 1999-09-07 | 1999-09-07 | Method and apparatus for treating organic wastewater containing high-concentration salts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25326699A JP3909793B2 (en) | 1999-09-07 | 1999-09-07 | Method and apparatus for treating organic wastewater containing high-concentration salts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001070989A true JP2001070989A (en) | 2001-03-21 |
| JP3909793B2 JP3909793B2 (en) | 2007-04-25 |
Family
ID=17248898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25326699A Expired - Fee Related JP3909793B2 (en) | 1999-09-07 | 1999-09-07 | Method and apparatus for treating organic wastewater containing high-concentration salts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3909793B2 (en) |
Cited By (44)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100463251B1 (en) * | 2002-09-11 | 2004-12-23 | 웅진코웨이주식회사 | Purified system having electro dialysis |
| EP1661863A1 (en) * | 2004-11-30 | 2006-05-31 | Grünbeck Wasseraufbereitung GmbH | Method and device for treating and/or purifying of fluids containing water hardness |
| JP2006181445A (en) * | 2004-12-27 | 2006-07-13 | Kurita Water Ind Ltd | Waste water treatment apparatus |
| WO2007046008A1 (en) * | 2005-10-17 | 2007-04-26 | Ockert Tobias Van Niekerk | Purification of water |
| JP2007209919A (en) * | 2006-02-10 | 2007-08-23 | Kobelco Eco-Solutions Co Ltd | Salt recovery method and salt recovery apparatus |
| WO2011162033A1 (en) * | 2010-06-21 | 2011-12-29 | 太平洋セメント株式会社 | Calcium removal method |
| CN102351352A (en) * | 2011-07-04 | 2012-02-15 | 昆明理工大学 | Electrodialysis-efficient evaporation method for treating mining and metallurgy waste water membrane filtrating concentrate |
| CN102502927A (en) * | 2011-12-22 | 2012-06-20 | 浙江大学 | Device and method for desalinizing alkaline water and seawater as well as concentrating and recovering mineral salts |
| CN102557324A (en) * | 2010-12-07 | 2012-07-11 | 光大环保科技发展（北京）有限公司 | Method for treating garbage leachate |
| JP2012130891A (en) * | 2010-12-24 | 2012-07-12 | Swing Corp | Method and apparatus for treating organic waste water |
| JP2013096701A (en) * | 2011-10-27 | 2013-05-20 | Kobelco Eco-Solutions Co Ltd | Water treatment method and water treatment facility |
| JP2013520315A (en) * | 2010-02-26 | 2013-06-06 | ゼネラル・エレクトリック・カンパニイ | Water treatment apparatus and method |
| WO2013099304A1 (en) * | 2011-12-28 | 2013-07-04 | 三菱重工メカトロシステムズ株式会社 | Wastewater treatment device |
| JP2013202604A (en) * | 2012-03-29 | 2013-10-07 | Kurita Water Ind Ltd | Method and device for treating thiourea containing water |
| CN103342432A (en) * | 2013-07-23 | 2013-10-09 | 南京工业大学 | Near zero emission process of salt-containing waste water |
| CN103570175A (en) * | 2013-10-25 | 2014-02-12 | 浙江博世华环保科技有限公司 | Method for processing percolate membrane treatment concentrated solution of waste incineration plant |
| CN104341062A (en) * | 2013-08-02 | 2015-02-11 | 厦门紫金矿冶技术有限公司 | Method for treating low-concentration salt-containing organic wastewater and recovering ionic surfactant in low-concentration salt-containing organic wastewater |
| WO2015037557A1 (en) * | 2013-09-11 | 2015-03-19 | 三菱レイヨン株式会社 | Apparatus and method for treating organic-containing wastewater |
| CN105217751A (en) * | 2014-06-19 | 2016-01-06 | 胡明成 | The multiple precipitator method are removed city refuse landfill and are concentrated liquid calcium, magnesium ion |
| CN105293805A (en) * | 2015-11-11 | 2016-02-03 | 光大环保技术研究院（深圳）有限公司 | High-salinity high-hardness waste water zero-discharge processing apparatus and method thereof |
| CN105481178A (en) * | 2015-12-28 | 2016-04-13 | 嘉园环保有限公司 | Landfill leachate treatment process with softening treatment |
| CN105541017A (en) * | 2015-12-30 | 2016-05-04 | 北京清大国华环境股份有限公司 | Method and device for realizing zero emission of strong brine |
| CN106348540A (en) * | 2016-10-25 | 2017-01-25 | 天津市环境保护科学研究院 | Treatment method and device of high-salt-content nondegradable dye wastewater pit-pond |
| CN106698790A (en) * | 2016-12-29 | 2017-05-24 | 青岛海大北方节能环保有限公司 | Comprehensive recycling method for graphite production wastewater |
| CN106830569A (en) * | 2017-03-31 | 2017-06-13 | 山西翔宇化工有限公司 | A kind of processing method of salt organic waste water high |
| JP2018086649A (en) * | 2016-11-29 | 2018-06-07 | 中国石油化工股▲ふん▼有限公司 | Method and system for treatment of brine waste water |
| CN108218049A (en) * | 2018-03-22 | 2018-06-29 | 山东泰禾环保科技股份有限公司 | Full embrane method haline water process for reclaiming and its device |
| CN108689540A (en) * | 2017-04-12 | 2018-10-23 | 麦王环境技术股份有限公司 | Incineration of refuse flyash wastewater zero discharge and recycling unit and treatment process |
| CN108726742A (en) * | 2018-07-06 | 2018-11-02 | 常熟浦发第二热电能源有限公司 | A kind of Domestic Waste Leachate purification technique |
| KR101948185B1 (en) * | 2018-10-08 | 2019-02-14 | (주)이앤씨 | Treatment of reverse osmosis concentrated water using Electro-Dialysis system and vacuum evaporation drying system |
| CN109574356A (en) * | 2018-12-26 | 2019-04-05 | 合肥恒力装备有限公司 | A kind of ternary material cleaning wastewater zero emission treatment method |
| CN109896685A (en) * | 2019-04-23 | 2019-06-18 | 泉州师范学院 | A kind of printing and dyeing hc effluent innocuity disposal system and method |
| CN110451706A (en) * | 2019-05-13 | 2019-11-15 | 上海晶宇环境工程股份有限公司 | The separating technology and special equipment of high-enriched organics and salt during strong brine zero-emission |
| CN110668517A (en) * | 2019-09-23 | 2020-01-10 | 励福(江门)环保科技股份有限公司 | Novel evaporative crystallization concentration treatment method for high-salinity wastewater |
| CN111875090A (en) * | 2020-06-30 | 2020-11-03 | 成都泓润科技有限公司 | Waste water treatment method |
| CN112093958A (en) * | 2020-08-21 | 2020-12-18 | 深圳市利赛实业发展有限公司 | Leachate treatment system in refuse landfill and treatment process thereof |
| CN112225372A (en) * | 2020-09-17 | 2021-01-15 | 广东闻扬环境科技有限公司 | Landfill leachate wastewater treatment system and treatment method |
| CN113880343A (en) * | 2021-11-01 | 2022-01-04 | 鄂尔多斯市环保投资有限公司 | High-efficiency resource utilization method for high-concentration sulfur-containing heavy metal organic wastewater |
| CN114230081A (en) * | 2021-12-24 | 2022-03-25 | 华能辛店发电有限公司 | Method for preparing snow-melting agent and deicing fan blades by using desulfurization wastewater |
| CN114314724A (en) * | 2022-01-05 | 2022-04-12 | 四川雄港玻璃有限公司 | Glass production sewage treatment circulation system |
| CN114538675A (en) * | 2022-01-11 | 2022-05-27 | 安徽普朗膜技术有限公司 | Landfill leachate treatment system and treatment method |
| CN114735874A (en) * | 2022-04-08 | 2022-07-12 | 中国石油化工股份有限公司 | Method and device for continuously treating high-salinity desulfurization wastewater |
| CN114906989A (en) * | 2022-05-24 | 2022-08-16 | 天津高能时代水处理科技有限公司 | Coal chemical industry waste water salt-separation zero-emission process system and treatment method |
| CN115490308A (en) * | 2022-10-25 | 2022-12-20 | 北控水务(中国)投资有限公司 | Reverse osmosis concentrated water regeneration treatment equipment and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20240026392A (en) | 2022-08-19 | 2024-02-28 | 주식회사 유니스캔 | A method for purifying wastewater with high salinity and purification system using the same |
-
1999
- 1999-09-07 JP JP25326699A patent/JP3909793B2/en not_active Expired - Fee Related
Cited By (64)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100463251B1 (en) * | 2002-09-11 | 2004-12-23 | 웅진코웨이주식회사 | Purified system having electro dialysis |
| EP1661863A1 (en) * | 2004-11-30 | 2006-05-31 | Grünbeck Wasseraufbereitung GmbH | Method and device for treating and/or purifying of fluids containing water hardness |
| JP2006181445A (en) * | 2004-12-27 | 2006-07-13 | Kurita Water Ind Ltd | Waste water treatment apparatus |
| WO2007046008A1 (en) * | 2005-10-17 | 2007-04-26 | Ockert Tobias Van Niekerk | Purification of water |
| AU2006305560B2 (en) * | 2005-10-17 | 2010-05-27 | Ockert Tobias Van Niekerk | Purification of water |
| US7871523B2 (en) * | 2005-10-17 | 2011-01-18 | Ockert Tobias Van Niekerk | Purification of water |
| JP2007209919A (en) * | 2006-02-10 | 2007-08-23 | Kobelco Eco-Solutions Co Ltd | Salt recovery method and salt recovery apparatus |
| JP2013520315A (en) * | 2010-02-26 | 2013-06-06 | ゼネラル・エレクトリック・カンパニイ | Water treatment apparatus and method |
| CN102947227A (en) * | 2010-06-21 | 2013-02-27 | 太平洋水泥株式会社 | Calcium removal method |
| JP5878466B2 (en) * | 2010-06-21 | 2016-03-08 | 太平洋セメント株式会社 | How to remove calcium |
| WO2011162033A1 (en) * | 2010-06-21 | 2011-12-29 | 太平洋セメント株式会社 | Calcium removal method |
| CN102557324A (en) * | 2010-12-07 | 2012-07-11 | 光大环保科技发展（北京）有限公司 | Method for treating garbage leachate |
| JP2012130891A (en) * | 2010-12-24 | 2012-07-12 | Swing Corp | Method and apparatus for treating organic waste water |
| CN102351352A (en) * | 2011-07-04 | 2012-02-15 | 昆明理工大学 | Electrodialysis-efficient evaporation method for treating mining and metallurgy waste water membrane filtrating concentrate |
| JP2013096701A (en) * | 2011-10-27 | 2013-05-20 | Kobelco Eco-Solutions Co Ltd | Water treatment method and water treatment facility |
| CN102502927A (en) * | 2011-12-22 | 2012-06-20 | 浙江大学 | Device and method for desalinizing alkaline water and seawater as well as concentrating and recovering mineral salts |
| CN102502927B (en) * | 2011-12-22 | 2013-06-12 | 浙江大学 | Device and method for desalinizing alkaline water and seawater as well as concentrating and recovering mineral salts |
| WO2013099304A1 (en) * | 2011-12-28 | 2013-07-04 | 三菱重工メカトロシステムズ株式会社 | Wastewater treatment device |
| JP2013138977A (en) * | 2011-12-28 | 2013-07-18 | Mitsubishi Heavy Industries Mechatronics Systems Ltd | Waste water treatment device |
| US9868656B2 (en) | 2011-12-28 | 2018-01-16 | Mitsubishi Heavy Industries Mechatronics Systems | Wastewater treatment device |
| CN103930380A (en) * | 2011-12-28 | 2014-07-16 | 三菱重工机电系统株式会社 | Wastewater treatment device |
| JP2013202604A (en) * | 2012-03-29 | 2013-10-07 | Kurita Water Ind Ltd | Method and device for treating thiourea containing water |
| CN103342432B (en) * | 2013-07-23 | 2015-10-28 | 南京工业大学 | A kind of near zero release technique of brine waste |
| CN103342432A (en) * | 2013-07-23 | 2013-10-09 | 南京工业大学 | Near zero emission process of salt-containing waste water |
| CN104341062A (en) * | 2013-08-02 | 2015-02-11 | 厦门紫金矿冶技术有限公司 | Method for treating low-concentration salt-containing organic wastewater and recovering ionic surfactant in low-concentration salt-containing organic wastewater |
| WO2015037557A1 (en) * | 2013-09-11 | 2015-03-19 | 三菱レイヨン株式会社 | Apparatus and method for treating organic-containing wastewater |
| CN105555717B (en) * | 2013-09-11 | 2018-06-05 | 三菱化学株式会社 | The processing unit and processing method of organic sewage |
| CN105555717A (en) * | 2013-09-11 | 2016-05-04 | 三菱丽阳株式会社 | Apparatus and method for treating organic-containing wastewater |
| JPWO2015037557A1 (en) * | 2013-09-11 | 2017-03-02 | 三菱レイヨン株式会社 | Organic wastewater treatment apparatus and treatment method |
| CN103570175A (en) * | 2013-10-25 | 2014-02-12 | 浙江博世华环保科技有限公司 | Method for processing percolate membrane treatment concentrated solution of waste incineration plant |
| CN105217751A (en) * | 2014-06-19 | 2016-01-06 | 胡明成 | The multiple precipitator method are removed city refuse landfill and are concentrated liquid calcium, magnesium ion |
| CN105293805A (en) * | 2015-11-11 | 2016-02-03 | 光大环保技术研究院（深圳）有限公司 | High-salinity high-hardness waste water zero-discharge processing apparatus and method thereof |
| CN105481178A (en) * | 2015-12-28 | 2016-04-13 | 嘉园环保有限公司 | Landfill leachate treatment process with softening treatment |
| CN105541017A (en) * | 2015-12-30 | 2016-05-04 | 北京清大国华环境股份有限公司 | Method and device for realizing zero emission of strong brine |
| CN105541017B (en) * | 2015-12-30 | 2023-06-30 | 清大国华环境集团股份有限公司 | Method and device for zero emission of strong brine |
| CN106348540A (en) * | 2016-10-25 | 2017-01-25 | 天津市环境保护科学研究院 | Treatment method and device of high-salt-content nondegradable dye wastewater pit-pond |
| JP2018086649A (en) * | 2016-11-29 | 2018-06-07 | 中国石油化工股▲ふん▼有限公司 | Method and system for treatment of brine waste water |
| US10669168B2 (en) | 2016-11-29 | 2020-06-02 | China Petroleum & Chemical Corporation | Method and system for treating brine waste water |
| CN106698790B (en) * | 2016-12-29 | 2023-06-30 | 青岛北方节能环保有限公司 | Comprehensive recycling method for graphite production wastewater |
| CN106698790A (en) * | 2016-12-29 | 2017-05-24 | 青岛海大北方节能环保有限公司 | Comprehensive recycling method for graphite production wastewater |
| CN106830569A (en) * | 2017-03-31 | 2017-06-13 | 山西翔宇化工有限公司 | A kind of processing method of salt organic waste water high |
| CN108689540A (en) * | 2017-04-12 | 2018-10-23 | 麦王环境技术股份有限公司 | Incineration of refuse flyash wastewater zero discharge and recycling unit and treatment process |
| CN108218049A (en) * | 2018-03-22 | 2018-06-29 | 山东泰禾环保科技股份有限公司 | Full embrane method haline water process for reclaiming and its device |
| CN108726742A (en) * | 2018-07-06 | 2018-11-02 | 常熟浦发第二热电能源有限公司 | A kind of Domestic Waste Leachate purification technique |
| KR101948185B1 (en) * | 2018-10-08 | 2019-02-14 | (주)이앤씨 | Treatment of reverse osmosis concentrated water using Electro-Dialysis system and vacuum evaporation drying system |
| CN109574356A (en) * | 2018-12-26 | 2019-04-05 | 合肥恒力装备有限公司 | A kind of ternary material cleaning wastewater zero emission treatment method |
| CN109896685B (en) * | 2019-04-23 | 2024-03-05 | 泉州师范学院 | Printing and dyeing high-concentration wastewater harmless treatment system and method |
| CN109896685A (en) * | 2019-04-23 | 2019-06-18 | 泉州师范学院 | A kind of printing and dyeing hc effluent innocuity disposal system and method |
| CN110451706A (en) * | 2019-05-13 | 2019-11-15 | 上海晶宇环境工程股份有限公司 | The separating technology and special equipment of high-enriched organics and salt during strong brine zero-emission |
| CN110451706B (en) * | 2019-05-13 | 2023-10-27 | 上海晶宇环境工程股份有限公司 | Separation process of high-concentration organic matters and salt in zero-emission process of strong brine and special equipment |
| CN110668517A (en) * | 2019-09-23 | 2020-01-10 | 励福(江门)环保科技股份有限公司 | Novel evaporative crystallization concentration treatment method for high-salinity wastewater |
| CN111875090A (en) * | 2020-06-30 | 2020-11-03 | 成都泓润科技有限公司 | Waste water treatment method |
| CN112093958A (en) * | 2020-08-21 | 2020-12-18 | 深圳市利赛实业发展有限公司 | Leachate treatment system in refuse landfill and treatment process thereof |
| CN112225372B (en) * | 2020-09-17 | 2021-11-23 | 广东闻扬环境科技有限公司 | Landfill leachate wastewater treatment system and treatment method |
| CN112225372A (en) * | 2020-09-17 | 2021-01-15 | 广东闻扬环境科技有限公司 | Landfill leachate wastewater treatment system and treatment method |
| CN113880343A (en) * | 2021-11-01 | 2022-01-04 | 鄂尔多斯市环保投资有限公司 | High-efficiency resource utilization method for high-concentration sulfur-containing heavy metal organic wastewater |
| CN114230081A (en) * | 2021-12-24 | 2022-03-25 | 华能辛店发电有限公司 | Method for preparing snow-melting agent and deicing fan blades by using desulfurization wastewater |
| CN114230081B (en) * | 2021-12-24 | 2024-04-16 | 华能辛店发电有限公司 | Method for preparing snow-melting agent and for deicing fan blades by using desulfurization wastewater |
| CN114314724A (en) * | 2022-01-05 | 2022-04-12 | 四川雄港玻璃有限公司 | Glass production sewage treatment circulation system |
| CN114538675A (en) * | 2022-01-11 | 2022-05-27 | 安徽普朗膜技术有限公司 | Landfill leachate treatment system and treatment method |
| CN114735874A (en) * | 2022-04-08 | 2022-07-12 | 中国石油化工股份有限公司 | Method and device for continuously treating high-salinity desulfurization wastewater |
| CN114906989A (en) * | 2022-05-24 | 2022-08-16 | 天津高能时代水处理科技有限公司 | Coal chemical industry waste water salt-separation zero-emission process system and treatment method |
| CN115490308A (en) * | 2022-10-25 | 2022-12-20 | 北控水务(中国)投资有限公司 | Reverse osmosis concentrated water regeneration treatment equipment and method |
| CN115490308B (en) * | 2022-10-25 | 2023-11-10 | 北控水务(中国)投资有限公司 | Reverse osmosis concentrated water regeneration treatment equipment and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3909793B2 (en) | 2007-04-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3909793B2 (en) | Method and apparatus for treating organic wastewater containing high-concentration salts | |
| JP5567468B2 (en) | Method and apparatus for treating organic wastewater | |
| US7981295B2 (en) | Enhanced high water recovery membrane process | |
| JP5873771B2 (en) | Organic wastewater treatment method and treatment apparatus | |
| JP3842907B2 (en) | Treatment of metal-containing wastewater and method for recovering valuable metals | |
| CN105540967A (en) | Processing method for reducing and recycling organic waste water and processing system | |
| EP2421798A2 (en) | Water treatment | |
| JP2003236584A (en) | Sewage treatment apparatus | |
| JP3800450B2 (en) | Method and apparatus for treating organic wastewater containing high concentrations of salts | |
| KR100347864B1 (en) | System of treated for industrial wastewater | |
| CN106745981A (en) | A kind of system and method for high-salt wastewater treatment for reuse | |
| JP3800449B2 (en) | Method and apparatus for treating organic wastewater containing high concentrations of salts | |
| CN109095692A (en) | A kind of processing system and processing method of electroplating wastewater bio-chemical effluent | |
| WO2011020176A1 (en) | Enhanced high water recovery membrane process | |
| CN206437968U (en) | A kind of system of high-salt wastewater treatment for reuse | |
| JPH0714512B2 (en) | Treatment method of wastewater containing heavy metals | |
| KR0162157B1 (en) | Process for treating chemical waste by reverse osmotic membrane system | |
| JP2006095425A (en) | Method for purifying biological treatment water-containing water of waste water and apparatus for purifying the same | |
| KR100398417B1 (en) | A method for treating electrogalvanizing wastewaters | |
| KR100313670B1 (en) | Treatment of the steel-can waste water | |
| JP4229361B2 (en) | Cleaning wastewater treatment method | |
| JP2007209919A (en) | Salt recovery method and salt recovery apparatus | |
| JP3098965B2 (en) | Water treatment method and water treatment device | |
| JP7350886B2 (en) | water treatment equipment | |
| KR100345725B1 (en) | A Method for Purifying Wastewater Using Reverse Osmosis and Nanofiltration System |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20050819 |
|
| RD04 | Notification of resignation of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7424 Effective date: 20060324 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20070117 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20070122 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 3909793 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100202 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110202 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110202 Year of fee payment: 4 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110202 Year of fee payment: 4 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120202 Year of fee payment: 5 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120202 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130202 Year of fee payment: 6 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140202 Year of fee payment: 7 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |