JP2834082B2 - Treatment method for antimony-containing water - Google Patents
Treatment method for antimony-containing waterInfo
- Publication number
- JP2834082B2 JP2834082B2 JP8167384A JP16738496A JP2834082B2 JP 2834082 B2 JP2834082 B2 JP 2834082B2 JP 8167384 A JP8167384 A JP 8167384A JP 16738496 A JP16738496 A JP 16738496A JP 2834082 B2 JP2834082 B2 JP 2834082B2
- Authority
- JP
- Japan
- Prior art keywords
- antimony
- treatment
- containing water
- salt
- coagulation
- 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.)
- Expired - Lifetime
Links
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Removal Of Specific Substances (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明はアンチモン含有水の
処理方法に関する。The present invention relates to a method for treating antimony-containing water.
【０００２】[0002]
【従来の技術】従来、アンチモン含有水の処理方法とし
て、塩化鉄、硫酸鉄などの鉄塩（例えば特開昭６３−２
３６５９２号公報）、硫酸バンドなどのアルミニウム
塩、塩化カルシウムなどのカルシウム塩（例えば特開平
３−５２６９０号公報）を添加し、凝集沈殿する方法が
知られている。また、重金属含有排水処理にカルシウム
塩と第二鉄塩による凝集沈殿法が用いられることが多い
が、アンチモンに関しては高度処理は困難である。2. Description of the Related Art Conventionally, as a method for treating antimony-containing water, iron salts such as iron chloride and iron sulfate (for example, see JP-A-63-2
No. 36592), a method of adding an aluminum salt such as a sulfuric acid band, and a calcium salt such as calcium chloride (for example, JP-A-3-52690) to perform coagulation and precipitation. In addition, a coagulation sedimentation method using a calcium salt and a ferric salt is often used for the heavy metal-containing wastewater treatment, but advanced treatment of antimony is difficult.
【０００３】[0003]
【発明が解決しようとする課題】上述した従来のアンチ
モン含有水の処理方法には次のような欠点があった。The above-mentioned conventional method for treating antimony-containing water has the following drawbacks.
【０００４】同一の薬剤を多量に使用しても、薬剤使用
量にアンチモン除去性が伴わず高度、かつ、効率的に処
理することが困難である。[0004] Even if a large amount of the same drug is used, it is difficult to efficiently and efficiently treat the amount of the drug used without the antimony removal property.
【０００５】又特開昭６３−２３６５９２号公報の方法
においては、３価のアンチモンが排水中に共存する場合
は、処理が不安定となるために、第二鉄塩処理を行う前
処理として、排水を曝気し、排水中のアンチモンを５価
のアンチモンにする必要があると共に、汚泥による散気
装置の目詰まりの問題も生じる。In the method disclosed in JP-A-63-236592, when trivalent antimony coexists in wastewater, the treatment becomes unstable. It is necessary to aerate the wastewater to convert antimony in the wastewater to pentavalent antimony, and there is also a problem of clogging of the diffuser by sludge.
【０００６】本発明は、上記問題点を解決するためのも
ので、アンチモン含有水中のアンチモンを高度、かつ、
効率的に除去できるアンチモン含有水の処理方法を提供
することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is intended to improve the antimony content in antimony-containing water at a high level.
An object of the present invention is to provide a method for treating antimony-containing water that can be efficiently removed.
【０００７】[0007]
【課題を解決するための手段】本発明はアンチモン含有
水中のアンチモンを除去するため、従来法のＣａ塩（カ
ルシウム塩：ＣａＣｌ2 、Ｃａ（ＯＨ）2 等）による凝
集沈殿工程の後段にＭｇ塩（マグネシウム塩：ＭｇＣｌ
2 等）による凝集沈殿行程を付加することで、高度、か
つ、効率的にアンチモンを除去できる特徴を有する。According to the present invention, in order to remove antimony in antimony-containing water, a Mg salt is added after the coagulation and precipitation step using a conventional Ca salt (calcium salt: CaCl 2 , Ca (OH) 2, etc.). (Magnesium salt: MgCl
2 ) etc., the feature is that antimony can be removed efficiently and efficiently.
【０００８】本発明による処理方法は、まず、アンチモ
ン含有水をＣａ塩の存在下においてｐＨ８〜１０に調整
することにより凝集沈殿処理し、固液分離により固液除
去し、前段処理とする。In the treatment method according to the present invention, first, antimony-containing water is adjusted to pH 8 to 10 in the presence of a Ca salt to perform coagulation sedimentation treatment, followed by solid-liquid separation to remove solid and liquid, and a pretreatment.
【０００９】次に、液状分をＭｇ塩存在下においてｐＨ
９〜１１に調整することにより凝集沈殿処理し、固液分
離により固形分を除去し、後段処理とする。Next, the pH of the liquid component is determined in the presence of Mg salt.
The coagulation and sedimentation treatment is performed by adjusting to 9 to 11, and the solid content is removed by solid-liquid separation, and the post-treatment is performed.
【００１０】[0010]
【作用】従来の水酸化カルシウムＣａ（ＯＨ）2 の凝集
沈殿でアンチモンを高度処理するためには、多量の薬剤
を必要とし、その結果、大量の汚泥を発生させる。本発
明では、アンチモンの高度処理は後段の水酸化マグネシ
ウムＭｇ（ＯＨ）2 による凝集沈殿で実行されるため、
前段の水酸化カルシウムによる凝集沈殿処理により発生
する汚泥量を考慮しても、処理全体で発生する汚泥量
は、低減し、なおかつ、アンチモンの処理性（除去性）
の向上が可能となる。In order to treat antimony to a high degree by the conventional coagulation and precipitation of calcium hydroxide Ca (OH) 2 , a large amount of chemical is required, and as a result, a large amount of sludge is generated. In the present invention, since the advanced treatment of antimony is performed by coagulation precipitation with magnesium hydroxide Mg (OH) 2 at the subsequent stage,
Even considering the amount of sludge generated by the coagulation and sedimentation treatment with calcium hydroxide in the former stage, the amount of sludge generated in the entire treatment is reduced, and at the same time, antimony treatability (removability)
Can be improved.
【００１１】[0011]
【発明の実施の形態】次に本発明について図面を参照し
て説明する。図１は本発明の一実施の形態を説明する為
の処理槽の構成図であり、前段処理であるＣａ塩による
凝集沈殿に用いる複数の槽と、後段処理であるＭｇ塩に
よる凝集沈殿に用いる複数の槽から構成される。以下処
理方法と共に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a treatment tank for explaining an embodiment of the present invention, and is used for a plurality of tanks used for agglomeration and precipitation with a Ca salt as a pre-treatment and for agglomeration and precipitation with a Mg salt as a post-treatment. It is composed of multiple tanks. Hereinafter, the processing method will be described.
【００１２】まず、アンチモン（Ｓｂ）を含む原水７を
第一反応槽１に送り、Ｃａ（ＯＨ）2 溶液とＮａＯＨ溶
液を加えｐＨを８〜１０として第一凝集槽２に送り、凝
集剤を添加することによりＳｂをＣａ（ＯＨ）2 粒子と
共に凝集する。この凝集液を第一沈降槽３に送り固液分
離することにより、大部分のＳｂは汚泥８Ａ中に含まれ
て分離される。First, the raw water 7 containing antimony (Sb) is sent to the first reaction tank 1, a Ca (OH) 2 solution and a NaOH solution are added to adjust the pH to 8 to 10, and then sent to the first coagulation tank 2, where the coagulant is added. The addition causes Sb to coagulate with the Ca (OH) 2 particles. Most of the Sb is contained in the sludge 8A and separated by sending the coagulated liquid to the first settling tank 3 and separating it into solid and liquid.
【００１３】従来の技術では、この様な一段反応でアン
チモンを処理しているため、アンチモンの高度処理は困
難であった。本発明では、さらに、Ｍｇ塩による凝集沈
殿処理を付加することで、アンチモンの高度処理と汚泥
発生量の低減を可能とした。In the prior art, since antimony is treated by such a one-step reaction, advanced treatment of antimony is difficult. In the present invention, the advanced treatment of antimony and the reduction of the amount of generated sludge are made possible by adding a coagulation precipitation treatment using an Mg salt.
【００１４】第一沈降槽３で固形分を除去された１次処
理水９Ａは、第二反応槽４に送られＭｇＣｌ2 溶液が加
えられ適当なｐＨ条件下でＭｇ塩と反応し第二凝集槽５
へ送られ、凝集剤の添加によりＳｂはＭｇ（ＯＨ）2 と
ともに凝集する。この凝集液は第二沈降槽６にて固液分
離され、１次処理水中のＳｂが汚泥８Ｂとして除去され
る。この処理により０．００５ｍｇＳｂ／ｌ以下となっ
た２次処理水９Ｂは放流される。The primary treated water 9A from which solids have been removed in the first settling tank 3 is sent to the second reaction tank 4 where an MgCl 2 solution is added and reacts with an Mg salt under appropriate pH conditions to form a second coagulated water. Tank 5
Sb is coagulated with Mg (OH) 2 by the addition of the coagulant. This flocculated liquid is separated into solid and liquid in the second settling tank 6, and Sb in the primary treatment water is removed as sludge 8B. The secondary treatment water 9B which has become 0.005 mgSb / l or less by this treatment is discharged.
【００１５】第二反応槽においてＳｂを凝集させるＭｇ
（ＯＨ）2 の沈殿を作る為の好ましいｐＨの範囲は９〜
１１であり、これより酸性又はアルカリ性ではＭｇ（Ｏ
Ｈ）2 の沈殿は少くなる。薬液の添加量を少くする為に
はｐＨは９〜１０程度がよい。 実施例 次に本発明の一実施例について、図２を参照して説明す
る。Mg for coagulating Sb in the second reaction tank
The preferred pH range for making the (OH) 2 precipitate is 9-
11 and more acidic or alkaline Mg (O
H) The precipitation of 2 is reduced. In order to reduce the amount of the chemical solution, the pH is preferably about 9 to 10. Embodiment Next, an embodiment of the present invention will be described with reference to FIG.
【００１６】アンチモンを０．０９ｍｇ／含有する水に
５％Ｃａ（ＯＨ）2 水溶液を添加し、Ｃａ濃度（Ｃａ）
を１０００ｍｇ／ｌとする。本実施例では、他のイオン
が共存するため（Ｃａ）値を設定したが、液性状に応じ
て（Ｃａ）値は変更できる。A 5% Ca (OH) 2 aqueous solution was added to water containing 0.09 mg / antimony to obtain a Ca concentration (Ca).
To 1000 mg / l. In the present embodiment, the (Ca) value is set because other ions coexist, but the (Ca) value can be changed according to the liquid properties.
【００１７】３０分攪拌・反応後、ｐＨ８に設定し、さ
らに、１５分攪拌・反応させる。凝集剤（ダイヤフロッ
クＡｐ−１２０）を１ｍｇ／ｌとなるように添加する。
凝集剤の種類、濃度に関しては液性状に応じて変更でき
る。After stirring and reacting for 30 minutes, the pH is set to 8, and the mixture is further stirred and reacted for 15 minutes. A flocculant (Diafloc Ap-120) is added to a concentration of 1 mg / l.
The type and concentration of the flocculant can be changed according to the liquid properties.
【００１８】次に、攪拌を停止し、凝集沈殿させ、固液
分離し、Ｓｂを０．０２８ｍｇ／ｌ含有する液を得る。
ろ液に２４％ＭｇＣｌ2 水溶液を添加し、Ｍｇ濃度［Ｍ
ｇ］を４００ｍｇ／ｌとする。本実施例では、他のイオ
ンが共存するため［Ｍｇ］値を設定したが、液性状に応
じて［Ｍｇ］値は変更できる。Next, stirring is stopped, coagulation and sedimentation is performed, and solid-liquid separation is performed to obtain a liquid containing 0.028 mg / l of Sb.
A 24% MgCl 2 aqueous solution was added to the filtrate, and the Mg concentration [M
g] is set to 400 mg / l. In this embodiment, the [Mg] value is set because other ions coexist, but the [Mg] value can be changed according to the liquid properties.
【００１９】３０分攪拌・反応後、ｐＨ１０に設定し、
さらに、１５分攪拌・反応させる。凝集剤（ダイヤフロ
ックＡＰ−１２０）を１ｍｇ／ｌとなるように添加す
る。凝集剤の種類、濃度に関しては液性状に応じて変更
できる。After 30 minutes of stirring and reaction, the pH is set to 10,
Further, the mixture is stirred and reacted for 15 minutes. An aggregating agent (Diafloc AP-120) is added to a concentration of 1 mg / l. The type and concentration of the flocculant can be changed according to the liquid properties.
【００２０】攪拌を停止し、凝集沈殿させ固液分離す
る。この操作によりＳｂを０．００５ｍｇ／ｌ含有する
液を得ることができる。The stirring is stopped to cause coagulation and sedimentation for solid-liquid separation. By this operation, a solution containing 0.005 mg / l of Sb can be obtained.
【００２１】[0021]
【発明の効果】第一の効果は、従来法では困難であった
アンチモン含有水中のアンチモンを高度に処理すること
ができる。その理由は、Ｃａ塩を用いる従来法の後段に
Ｍｇ塩による凝集沈殿工程を付加したことにある。The first effect is that antimony in antimony-containing water can be treated at a high level, which has been difficult with the conventional method. The reason is that a coagulation precipitation step using an Mg salt is added to the latter stage of the conventional method using a Ca salt.
【００２２】第二の効果は、アンチモンの高度処理工程
で発生する汚泥を低減できる。その理由は、従来法の一
段処理では、アンチモンの高度処理には多量の薬剤を必
要とし、その結果、多量の汚泥が発生したが、処理工程
を二段階としたため、各工程での薬剤使用量を低減でき
る為、合計の汚泥量も低減するからである。The second effect is that sludge generated in the advanced antimony treatment step can be reduced. The reason is that in the conventional single-stage treatment, a large amount of chemical is required for the advanced treatment of antimony, and as a result, a large amount of sludge was generated. This is because the total amount of sludge can also be reduced.
【００２３】第三の効果は、アンチモン含有水中の３価
のアンチモンも安定した高度処理が可能であるため、ア
ンチモン含有水中の３価のアンチモンを５価のアンチモ
ンにする曝気工程を省略できる。その理由は明らかでな
いが、処理工程を二段階としたためと思われる。The third effect is that, since trivalent antimony in antimony-containing water can also be subjected to stable advanced treatment, the aeration step of converting trivalent antimony in antimony-containing water to pentavalent antimony can be omitted. Although the reason is not clear, it is considered that the treatment step was performed in two steps.
【図１】本発明の実施の形態を説明する為の処理槽の構
成図。FIG. 1 is a configuration diagram of a processing tank for describing an embodiment of the present invention.
【図２】本発明の一実施例を説明する為のアンチモン含
有水処理フロー図。FIG. 2 is an antimony-containing water treatment flow chart for explaining one embodiment of the present invention.
１ 第一反応槽 ２ 第一凝集槽 ３ 第一沈降槽 ４ 第二反応槽 ５ 第二凝集槽 ６ 第二沈降槽 ７ 原水 ８Ａ，８Ｂ 汚泥 ９Ａ，９Ｂ 処理水 DESCRIPTION OF SYMBOLS 1 First reaction tank 2 First coagulation tank 3 First settling tank 4 Second reaction tank 5 Second coagulation tank 6 Second sedimentation tank 7 Raw water 8A, 8B Sludge 9A, 9B Treated water
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−291094（ＪＰ，Ａ) 特開 昭63−236592（ＪＰ，Ａ) 特開 昭48−68060（ＪＰ，Ａ) 特公 昭55−33952（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.6，ＤＢ名) C02F 1/62 C02F 1/52 C22B 30/00 - 30/02──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-291094 (JP, A) JP-A-63-236592 (JP, A) JP-A-48-68060 (JP, A) 33952 (JP, B2) (58) Fields investigated (Int. Cl. 6 , DB name) C02F 1/62 C02F 1/52 C22B 30/00-30/02
Claims (2)
しアルカリ性として水酸化物を沈殿させ、この水酸化物
を分離する第１の工程と、前記第１の工程により分離さ
れた水溶液へマグネシウム塩を添加しアルカリ性として
水酸化物を沈殿させ、この水酸化物を分離する第２の工
程とを含むことを特徴とするアンチモン含有水の処理方
法。1. A first step of adding a calcium salt to antimony-containing water to make it alkaline and precipitating a hydroxide, separating the hydroxide, and adding a magnesium salt to the aqueous solution separated in the first step. A second step of precipitating the hydroxide by adding it to alkalinity and separating the hydroxide.
ＰＨを９〜１１とする請求項１記載のアンチモン含有水
の処理方法。2. The method for treating antimony-containing water according to claim 1, wherein the pH of the aqueous solution is adjusted to 9 to 11 after adding the magnesium salt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8167384A JP2834082B2 (en) | 1996-06-27 | 1996-06-27 | Treatment method for antimony-containing water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8167384A JP2834082B2 (en) | 1996-06-27 | 1996-06-27 | Treatment method for antimony-containing water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH105772A JPH105772A (en) | 1998-01-13 |
| JP2834082B2 true JP2834082B2 (en) | 1998-12-09 |
Family
ID=15848715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8167384A Expired - Lifetime JP2834082B2 (en) | 1996-06-27 | 1996-06-27 | Treatment method for antimony-containing water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2834082B2 (en) |
-
1996
- 1996-06-27 JP JP8167384A patent/JP2834082B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH105772A (en) | 1998-01-13 |
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