JP2000167531A - Removal of organic harmful substance in soil, water, or sludge - Google Patents
Removal of organic harmful substance in soil, water, or sludgeInfo
- Publication number
- JP2000167531A JP2000167531A JP10344338A JP34433898A JP2000167531A JP 2000167531 A JP2000167531 A JP 2000167531A JP 10344338 A JP10344338 A JP 10344338A JP 34433898 A JP34433898 A JP 34433898A JP 2000167531 A JP2000167531 A JP 2000167531A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- soil
- organic
- organic solvent
- solvent
- 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.)
- Pending
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 49
- 239000000126 substance Substances 0.000 title claims abstract description 30
- 239000002689 soil Substances 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title description 4
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000003960 organic solvent Substances 0.000 claims abstract description 15
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 9
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 5
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims abstract description 3
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000008096 xylene Substances 0.000 claims abstract description 3
- 239000002351 wastewater Substances 0.000 claims description 20
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000005273 aeration Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 2
- 150000002013 dioxins Chemical class 0.000 abstract description 7
- 238000000605 extraction Methods 0.000 abstract description 7
- 231100000614 poison Toxicity 0.000 abstract description 5
- 239000002904 solvent Substances 0.000 abstract 4
- -1 drainage Substances 0.000 abstract 2
- 238000005276 aerator Methods 0.000 abstract 1
- 230000007096 poisonous effect Effects 0.000 abstract 1
- 239000013557 residual solvent Substances 0.000 abstract 1
- 239000003440 toxic substance Substances 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000004056 waste incineration Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical compound O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Fire-Extinguishing Compositions (AREA)
- Processing Of Solid Wastes (AREA)
- Physical Water Treatments (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、土壌もしくは廃棄
物焼却施設から出る排水またはスラッジもしくは管理埋
立地から出る浸出水または浸出水中スラッジの中の有機
系有害物質、例えばダイオキシン類のような猛毒物質
を、土壌、排水またはスラッジから除去し、土壌、排水
またはスラッジを無害化する方法に関する。The present invention relates to organic harmful substances in wastewater from soil or waste incineration plants or leachate from sludge or managed landfills or sludge from leachate water, and highly toxic substances such as dioxins. From soil, wastewater or sludge, and detoxifying the soil, wastewater or sludge.
【０００２】[0002]
【従来の技術】ごみ焼却施設からの排水、特に施設内洗
煙塔からの排水にはスラッジが多く含まれており、同時
に重金属類や有機系有害物質も存在する。重金属類につ
いては様々な処理方法が確立されており、最終的には重
金属類はスラッジ側に凝集される。2. Description of the Related Art Wastewater from refuse incineration facilities, especially from the smoke tower inside the facility, contains a large amount of sludge, and at the same time contains heavy metals and organic harmful substances. Various treatment methods have been established for heavy metals, and finally the heavy metals are aggregated on the sludge side.
【０００３】一方、有機系有害物質には難水溶性のもの
が多く、ほとんどがスラッジ側に移行する。そのためス
ラッジを含む排水の処理では、一般に排水中のスラッジ
を凝集沈殿させた後、排水を下水道に放流し、スラッジ
は管理埋め立て地に運ばれている。On the other hand, many organic harmful substances are poorly water-soluble, and most of them migrate to the sludge side. Therefore, in the treatment of wastewater containing sludge, generally, the sludge in the wastewater is coagulated and settled, and then the wastewater is discharged to a sewer, and the sludge is transported to a managed landfill.
【０００４】しかし、最近、この管理埋め立て地からの
浸出水が問題となっている。それは、この浸出水にはス
ラッジを始め有機系有害物質が含まれているからであ
る。浸出水の処理方法として、ごみ焼却施設内の排水処
理と同様の方法が採られているが、凝集されたスラッジ
は再び管理埋め立て地に戻されている。このため管理埋
め立て地内の有機系有害物質の量は増える一方である。However, recently, leachate from this landfill has become a problem. This is because this leachate contains sludge and other organic harmful substances. As a method of treating leachate, the same method as in wastewater treatment in a refuse incineration facility is used, but the agglomerated sludge is returned to a managed landfill. For this reason, the amount of organic harmful substances in managed landfills is increasing.
【０００５】また、ごみ焼却施設周辺の土壌についても
排ガスからの飛散によって、高濃度の有機系有害物質が
検出されている。[0005] High concentrations of organic harmful substances are also detected in the soil around the refuse incineration facility by scattering from the exhaust gas.
【０００６】この有機系有害物質には、ダイオキシン類
に代表されるような猛毒物質も含まれているにも拘ら
ず、確固とした処理方法が確立されていない。Although this organic harmful substance contains highly toxic substances typified by dioxins, a solid treatment method has not been established.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、上記実状に
鑑み、土壌、水またはスラッジ中からダイオキシン類に
代表される有機系有害物質を除去する有効な方法を提供
することを目的とするものである。SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide an effective method for removing organic harmful substances represented by dioxins from soil, water or sludge. It is.
【０００８】[0008]
【課題を解決するための手段】本発明による方法は、土
壌もしくは廃棄物焼却施設から出る排水またはスラッジ
もしくは管理埋立地から出る浸出水または浸出水中スラ
ッジの中の有機系有害物質、例えばダイオキシン類のよ
うな猛毒物質を、土壌、排水またはスラッジから除去す
るに当たり、土壌、排水またはスラッジを有機溶媒と充
分に混合して、土壌、排水またはスラッジ中に含まれる
有機系有害物質を有機溶媒に抽出させることを特徴とす
る土壌、水またはスラッジ中の有機系有害物質除去方法
である。SUMMARY OF THE INVENTION The process according to the invention is intended for the removal of organic harmful substances, such as dioxins, in wastewater from soil or waste incineration plants or in leachate from sludge or managed landfills or in leachate sludge. In removing such highly toxic substances from soil, wastewater or sludge, the soil, wastewater or sludge is thoroughly mixed with an organic solvent to extract organic harmful substances contained in the soil, wastewater or sludge into the organic solvent. A method for removing organic harmful substances in soil, water or sludge.
【０００９】用いられる有機溶媒としては、ｎ−ヘキサ
ン、メタノール、エタノール、プロパノール、ジエチレ
ングリコール、アセトン、酢酸エチル、酢酸ブチル、ジ
クロロメタン、ベンゼン、トルエンおよび／またはキシ
レンが好ましい。As the organic solvent used, n-hexane, methanol, ethanol, propanol, diethylene glycol, acetone, ethyl acetate, butyl acetate, dichloromethane, benzene, toluene and / or xylene are preferred.
【００１０】土壌、排水またはスラッジと有機溶媒の質
量比は、好ましくは１００対１から１００対２００の範
囲にある。The weight ratio of soil, waste water or sludge to organic solvent is preferably in the range from 100: 1 to 100: 200.
【００１１】この方法は、有機溶媒が液体で存在しうる
ような高温・高圧条件で行うことが好ましい。This method is preferably carried out under high temperature and high pressure conditions in which the organic solvent can exist as a liquid.
【００１２】土壌、排水またはスラッジから有機溶媒
を、比重差分離、加圧脱液や遠心分離のような一般化固
液分離手段；空気もしくは窒素ガスによる曝気；および
／または；加熱による有機溶媒蒸発により分離すること
が好ましい。[0012] Generalized solid-liquid separation means such as density difference separation, pressure dewatering and centrifugation; aeration with air or nitrogen gas; and / or; evaporation of organic solvent by heating Is preferable.
【００１３】[0013]
【発明の実施の形態】図１に土壌、排水またはスラッジ
中の有機系有害物質除去方法の実施例を示す。FIG. 1 shows an embodiment of a method for removing organic harmful substances from soil, wastewater or sludge.
【００１４】攪拌装置付きの抽出槽(1) に、有機系有害
物質を含むスラッジとｎ−ヘキサンを質量比１対１で投
入し、両者の混合物を充分に攪拌して、有機系有害物質
をｎ−ヘキサンに抽出させる。さらに、抽出効率を高め
るために、ｎ−ヘキサンが蒸発しない条件である温度１
５０℃、圧力９．４×１０5 Ｐａで撹拌を行う。抽出後
は、抽出槽(1) において比重差分離によりスラッジとｎ
−ヘキサンを分離する。１回の操作でスラッジ中から有
機系有害物質を充分に除けない場合には、上記混合物を
抽出槽(1) の底部から取出し、循環ライン(2) で抽出槽
(1) の頂部へ戻し、上記と同様に、再度スラッジとｎ−
ヘキサンの混合物を攪拌し、比重差分離によりスラッジ
とｎ−ヘキサンを分離する。Into an extraction tank (1) equipped with a stirrer, sludge containing an organic harmful substance and n-hexane are charged at a mass ratio of 1: 1, and the mixture of both is sufficiently stirred to remove the organic harmful substance. Extract into n-hexane. Furthermore, in order to enhance the extraction efficiency, the temperature 1 which is a condition under which n-hexane does not evaporate is used.
Stirring is performed at 50 ° C. and a pressure of 9.4 × 10 5 Pa. After extraction, sludge and n are separated by specific gravity difference separation in the extraction tank (1).
Separate the hexane. If the organic harmful substances cannot be sufficiently removed from the sludge in one operation, remove the above mixture from the bottom of the extraction tank (1) and place it in the circulation tank (2).
Return to the top of (1) and again, as above, with sludge and n-
The mixture of hexane is stirred and sludge and n-hexane are separated by specific gravity difference separation.
【００１５】ついで、処理スラッジを加圧脱液槽(3) へ
送り、ここでスラッジを加圧してスラッジから有機系有
害物質含有ｎ−ヘキサンを分離する。こうしてｎ−ヘキ
サンをある程度まで除いた後、スラッジを曝気槽(4) へ
送り、ここで空気による曝気で残りのｎ−ヘキサンをス
ラッジから除く。この処理によって得られた処理済みス
ラッジ中には有機系有害物質は全く含まれておらず、ｎ
−ヘキサンにすべて抽出されている。Next, the treated sludge is sent to a pressure dewatering tank (3) where the sludge is pressurized to separate n-hexane containing organic harmful substances from the sludge. After the n-hexane has been removed to some extent, the sludge is sent to the aeration tank (4), where the remaining n-hexane is removed from the sludge by aeration with air. The treated sludge obtained by this treatment does not contain any organic harmful substances, and n
-All have been extracted into hexane.
【００１６】操作前後のスラッジ中のダイオキシン類の
濃度およびダイオキシン類の除去率を表１に示す。Table 1 shows the concentration of dioxins in the sludge before and after the operation and the dioxin removal rate.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【発明の効果】本発明の方法により、土壌もしくは廃棄
物焼却施設から出る排水またはスラッジもしくは管理埋
立地から出る浸出水または浸出水中スラッジの中の有機
系有害物質、例えばダイオキシン類のような猛毒物質
を、土壌、排水またはスラッジから確実に除去し、土
壌、排水またはスラッジを無害化することができる。EFFECT OF THE INVENTION According to the method of the present invention, organic harmful substances such as toxic substances such as dioxins in wastewater discharged from soil or waste incineration facilities or leachate discharged from sludge or managed landfill or leachate sludge. Can be reliably removed from soil, wastewater or sludge, and the soil, wastewater or sludge can be rendered harmless.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明方法の実施例を示すフローシートであ
る。FIG. 1 is a flow sheet showing an embodiment of the method of the present invention.
１：抽出槽 ２：循環ライン ３：加圧脱液槽 ４：曝気槽 1: Extraction tank 2: Circulation line 3: Pressurized dewatering tank 4: Aeration tank
───────────────────────────────────────────────────── フロントページの続き (72)発明者 篠原 力男 大阪市住之江区南港北１丁目７番89号 日 立造船株式会社内 (72)発明者 長屋 喜一 大阪市住之江区南港北１丁目７番89号 日 立造船株式会社内 (72)発明者 井上 司朗 大阪市住之江区南港北１丁目７番89号 日 立造船株式会社内 Ｆターム(参考） 2E191 BA12 BB01 BC05 BD00 4D004 AA36 AA41 AB07 CA12 CA13 CA40 CC04 DA02 DA06 DA07 4D037 AA12 AA13 AB14 BA11 BB01 BB05 BB06 BB07 BB08 CA06 4D059 AA30 BH01 BH08 DB01 DB02 DB05 DB06 DB08 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Ritsuo Shinohara 1-7-89, Minami Kohoku, Suminoe-ku, Osaka-shi Inside Tachibashi Shipbuilding Co., Ltd. No. 89 Nippon Shipbuilding Co., Ltd. (72) Inventor Shiro Inoue 1-7-89 Minami Kohoku, Suminoe-ku, Osaka F-term inside Nitsubishi Shipbuilding Co., Ltd. CC04 DA02 DA06 DA07 4D037 AA12 AA13 AB14 BA11 BB01 BB05 BB06 BB07 BB08 CA06 4D059 AA30 BH01 BH08 DB01 DB02 DB05 DB06 DB08
Claims (5)
充分に混合して、土壌、排水またはスラッジ中に含まれ
る有機系有害物質を有機溶媒に抽出させることを特徴と
する土壌、水またはスラッジ中の有機系有害物質除去方
法。1. The method of claim 1 wherein the soil, wastewater or sludge is sufficiently mixed with an organic solvent to extract organic harmful substances contained in the soil, wastewater or sludge into the organic solvent. Organic harmful substance removal method.
エタノール、プロパノール、ジエチレングリコール、ア
セトン、酢酸エチル、酢酸ブチル、ジクロロメタン、ベ
ンゼン、トルエンおよび／またはキシレンであることを
特徴とする請求項１記載の有機系有害物質除去方法。2. An organic solvent comprising n-hexane, methanol,
2. The method for removing organic harmful substances according to claim 1, wherein the method is ethanol, propanol, diethylene glycol, acetone, ethyl acetate, butyl acetate, dichloromethane, benzene, toluene and / or xylene.
質量比が１００対１から１００対２００の範囲にあるこ
とを特徴とする請求項１または２記載の有機系有害物質
除去方法。3. The method for removing organic harmful substances according to claim 1, wherein the mass ratio of soil, waste water or sludge to the organic solvent is in the range of 100: 1 to 100: 200.
・高圧条件で行うことを特徴とする請求項１〜３のいず
れかに記載の有機系有害物質除去方法。4. The method for removing harmful organic substances according to claim 1, wherein the method is carried out under high temperature and high pressure conditions in which the organic solvent can exist as a liquid.
を固液分離手段、曝気および／または有機溶媒蒸発によ
り分離することを特徴とする請求項１〜４のいずれかに
記載の有機系有害物質除去方法。5. The method for removing organic harmful substances according to claim 1, wherein the organic solvent is separated from the soil, wastewater or sludge by solid-liquid separation means, aeration and / or evaporation of the organic solvent. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10344338A JP2000167531A (en) | 1998-12-03 | 1998-12-03 | Removal of organic harmful substance in soil, water, or sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10344338A JP2000167531A (en) | 1998-12-03 | 1998-12-03 | Removal of organic harmful substance in soil, water, or sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000167531A true JP2000167531A (en) | 2000-06-20 |
Family
ID=18368473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10344338A Pending JP2000167531A (en) | 1998-12-03 | 1998-12-03 | Removal of organic harmful substance in soil, water, or sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000167531A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002036278A1 (en) * | 2000-10-30 | 2002-05-10 | Alphonse Graffeo | Method and installation for depolluting soils |
| WO2003086673A1 (en) * | 2002-04-17 | 2003-10-23 | Pbm Kabushiki Kaisha | Method and device for removing harmful substances |
| JP2004243255A (en) * | 2003-02-17 | 2004-09-02 | Mitsumasa Okada | Treating method for organic chlorine compound |
| WO2015072740A1 (en) * | 2013-11-15 | 2015-05-21 | 김용환 | Method for treating organic waste liquid including sludge and waste water using solvent extraction |
-
1998
- 1998-12-03 JP JP10344338A patent/JP2000167531A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002036278A1 (en) * | 2000-10-30 | 2002-05-10 | Alphonse Graffeo | Method and installation for depolluting soils |
| WO2003086673A1 (en) * | 2002-04-17 | 2003-10-23 | Pbm Kabushiki Kaisha | Method and device for removing harmful substances |
| JP2004243255A (en) * | 2003-02-17 | 2004-09-02 | Mitsumasa Okada | Treating method for organic chlorine compound |
| WO2015072740A1 (en) * | 2013-11-15 | 2015-05-21 | 김용환 | Method for treating organic waste liquid including sludge and waste water using solvent extraction |
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