JP2001316118A - Method and apparatus for removing manganese - Google Patents
Method and apparatus for removing manganeseInfo
- Publication number
- JP2001316118A JP2001316118A JP2000132101A JP2000132101A JP2001316118A JP 2001316118 A JP2001316118 A JP 2001316118A JP 2000132101 A JP2000132101 A JP 2000132101A JP 2000132101 A JP2000132101 A JP 2000132101A JP 2001316118 A JP2001316118 A JP 2001316118A
- Authority
- JP
- Japan
- Prior art keywords
- manganese
- raw water
- alkaline substance
- concentration
- dissolved oxygen
- 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
Landscapes
- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、マンガンの除去方
法及び装置に関し、詳しくは、溶解性マンガンを酸化し
て不溶性の二酸化マンガンを生成させ、この二酸化マン
ガンの粒子を膜分離手段によって除去するマンガンの除
去方法及び装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing manganese, and more particularly to a method for oxidizing soluble manganese to form insoluble manganese dioxide and removing the manganese dioxide particles by means of a membrane separation means. The present invention relates to a method and an apparatus for removing carbon.
【０００２】[0002]
【従来の技術】原水中に含まれている溶解性マンガンを
除去する方法として、酸化力の強い二酸化塩素や過マン
ガン酸カリウム、オゾンのような酸化剤でマンガンを酸
化したり、塩素を用いた接触酸化法によりマンガンを酸
化したりした後、生成した二酸化マンガンを分離膜等を
使用して除去する方法が知られている。2. Description of the Related Art As a method of removing soluble manganese contained in raw water, manganese is oxidized with an oxidizing agent such as chlorine dioxide, potassium permanganate, or ozone having a strong oxidizing power, or chlorine is used. There is known a method of oxidizing manganese by a catalytic oxidation method and then removing the generated manganese dioxide using a separation membrane or the like.
【０００３】[0003]
【発明が解決しようとする課題】しかし、酸化剤を使用
した場合は、残留した酸化剤によって分離膜が損傷を受
けることがあるため、酸化剤を除去する工夫をしたり、
酸化剤に強い特殊な膜を選定したりする必要があった。
また、酸化剤として二酸化塩素を使用する場合は、その
発生機構が複雑であり、オゾンを使用する場合は、廃オ
ゾンの処理を別途必要とするという問題もある。さら
に、触媒を併用した塩素処理の場合は、原水中の有機物
からトリハロメタンのような有機塩素化合物が生成する
おそれがあるという問題があった。However, if an oxidizing agent is used, the separation membrane may be damaged by the remaining oxidizing agent.
It was necessary to select a special film that was strong against the oxidizing agent.
Further, when chlorine dioxide is used as the oxidizing agent, the generation mechanism is complicated, and when ozone is used, there is a problem that a separate treatment of waste ozone is required. Furthermore, in the case of chlorination using a catalyst, there is a problem that an organic chlorine compound such as trihalomethane may be generated from organic matter in raw water.
【０００４】そこで本発明は、酸化剤や塩素を使用する
ことなく、簡単な制御で溶解性マンガンを不溶性で容易
に分離可能な二酸化マンガンにして除去することができ
るマンガンの除去方法及び装置を提供することを目的と
している。Accordingly, the present invention provides a method and an apparatus for removing manganese which can remove soluble manganese into insoluble and easily separable manganese dioxide by simple control without using an oxidizing agent or chlorine. It is intended to be.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本発明のマンガンの除去方法は、原水中の溶解性マ
ンガンを除去するにあたり、原水にアルカリ性物質を供
給してｐＨを９〜１０に調節し、溶存酸素の存在下で前
記溶解性マンガンを不溶性の二酸化マンガンにした後、
生成した二酸化マンガン粒子を膜ろ過によって原水から
除去することを特徴としている。さらに、本発明方法
は、前記原水中のマンガン濃度、原水中の溶存酸素濃
度、原水の温度、原水のｐＨの少なくともいずれか一つ
を測定し、該測定値に応じて前記アルカリ性物質の供給
量を調節することを特徴としている。In order to achieve the above object, the method for removing manganese according to the present invention provides a method for removing soluble manganese in raw water by supplying an alkaline substance to the raw water to adjust the pH to 9-10. Adjusting the soluble manganese to insoluble manganese dioxide in the presence of dissolved oxygen,
It is characterized in that generated manganese dioxide particles are removed from raw water by membrane filtration. Further, the method of the present invention measures at least one of the manganese concentration in the raw water, the dissolved oxygen concentration in the raw water, the temperature of the raw water, and the pH of the raw water, and supplies the supply amount of the alkaline substance according to the measured value. It is characterized by adjusting.
【０００６】また、本発明のマンガンの除去装置は、溶
解性マンガンを含有した原水を受ける原水槽と、原水中
にアルカリ性物質を添加するアルカリ性物質供給手段
と、前記原水槽内の原水又は原水槽に流入する原水のｐ
Ｈを測定するｐＨ測定手段と、該ｐＨ測定手段で測定し
たｐＨに基づいて前記アルカリ性物質供給手段のアルカ
リ性物質供給量をｐＨが９〜１０の範囲になるように制
御する制御手段と、原水槽から抜出した原水中の固形物
を分離除去する膜分離手段とを備えていることを特徴と
している。The manganese removing apparatus of the present invention comprises a raw water tank for receiving raw water containing soluble manganese, an alkaline substance supply means for adding an alkaline substance to the raw water, and a raw water or raw water tank in the raw water tank. Of raw water flowing into
PH measuring means for measuring H, control means for controlling the alkaline substance supply amount of the alkaline substance supplying means based on the pH measured by the pH measuring means so that the pH is in the range of 9 to 10, and a raw water tank And a membrane separation means for separating and removing solid matter in raw water extracted from the raw water.
【０００７】さらに、本発明のマンガンの除去装置は、
前記膜分離手段の後段に、膜分離手段からの処理水を受
ける処理水槽と、処理水中に空気を供給する空気供給手
段と、膜処理水（膜ろ過水）のｐＨを測定するｐＨ測定
手段と、該ｐＨ測定手段で測定したｐＨに基づいて、処
理水が中性となるように前記空気供給手段の空気供給量
及び曝気時間を制御する制御手段とを設けたことを特徴
としている。Further, the apparatus for removing manganese according to the present invention comprises:
A treatment tank for receiving treated water from the membrane separation means, an air supply means for supplying air into the treated water, and a pH measurement means for measuring the pH of the treated water (membrane filtration water) at a stage subsequent to the membrane separation means. And control means for controlling the air supply amount and the aeration time of the air supply means so that the treated water becomes neutral based on the pH measured by the pH measurement means.
【０００８】また、前記制御手段は、マンガン測定手段
で測定した原水中のマンガン濃度に基づいて前記アルカ
リ性物質の供給量を調節すること、溶存酸素測定手段で
測定した溶存酸素濃度と前記マンガン濃度とに基づいて
前記アルカリ性物質の供給量を調節すること、温度測定
手段で測定した温度と前記マンガン濃度と前記溶存酸素
濃度とに基づいて前記アルカリ性物質の供給量を調節す
ることを特徴としている。The control means adjusts the supply amount of the alkaline substance based on the manganese concentration in the raw water measured by the manganese measuring means, and adjusts the dissolved oxygen concentration and the manganese concentration measured by the dissolved oxygen measuring means. And adjusting the supply amount of the alkaline substance based on the temperature measured by the temperature measuring means, the manganese concentration, and the dissolved oxygen concentration.
【０００９】さらに、前記制御手段は、前記マンガン濃
度と、前記溶存酸素濃度と、前記アルカリ性物質供給手
段からのアルカリ性物質供給量とをそれぞれ経時的に記
憶する手段と、前記マンガン濃度と溶存酸素濃度とから
マンガン除去量を求める手段と、該手段で求めたマンガ
ン除去量と前記アルカリ性物質供給量との相関関係を求
める手段と、該手段で求めた相関関係と前記マンガン濃
度とからアルカリ性物質の必要供給量を求める手段とを
備えていることを特徴としている。Further, the control means includes means for storing the manganese concentration, the dissolved oxygen concentration, and the supply amount of the alkaline substance from the alkaline substance supply means with time, respectively, the manganese concentration and the dissolved oxygen concentration. Means for determining the amount of manganese removed from the means, means for determining the correlation between the amount of manganese removed determined by the means and the supply amount of the alkaline substance, and the need for the alkaline substance from the correlation determined by the means and the manganese concentration. Means for determining the supply amount.
【００１０】[0010]
【発明の実施の形態】図１は、本発明のマンガン除去装
置の一形態例を示す系統図である。このマンガン除去装
置は、溶解性マンガンを含有した原水を受ける原水槽１
１と、原水槽１１内の原水中にアルカリ性物質、例えば
水酸化ナトリウム水溶液（ＮａＯＨ）を添加するアルカ
リ性物質供給手段１２と、原水中の固形分（濁質）を分
離する膜分離手段である膜モジュール１３と、膜モジュ
ール１３からの処理水を受ける処理水槽１４と、原水槽
１１の原水を膜モジュール１３に圧送する原水加圧ポン
プ１５とを備えている。さらに、膜モジュール１３部分
には、洗浄用空気を散気管１６に供給するエアーポンプ
１７と、膜差圧を測定する差圧計１８とが設けられてお
り、原水加圧ポンプ１５部分には、原水供給量を一定に
保つための流量計１９と制御器２０とが設けられてい
る。FIG. 1 is a system diagram showing one embodiment of a manganese removing apparatus according to the present invention. This manganese removal device is a raw water tank 1 for receiving raw water containing soluble manganese.
1, an alkaline substance supply means 12 for adding an alkaline substance, for example, an aqueous solution of sodium hydroxide (NaOH) to raw water in a raw water tank 11, and a membrane as a membrane separation means for separating solids (turbidity) in the raw water A module 13, a treated water tank 14 for receiving treated water from the membrane module 13, and a raw water pressurizing pump 15 for pumping raw water from the raw water tank 11 to the membrane module 13 are provided. Further, the membrane module 13 is provided with an air pump 17 for supplying cleaning air to the air diffuser 16 and a differential pressure gauge 18 for measuring the membrane pressure difference. A flow meter 19 and a controller 20 for keeping the supply amount constant are provided.
【００１１】流入管２１から原水槽１１内に流入した原
水は、アルカリ性物質供給手段１２から供給されるＮａ
ＯＨによってｐＨが９〜１０の範囲に制御された後、原
水加圧ポンプ１５によって膜モジュール１３に圧送さ
れ、原水中の固形分が分離される。固形分を分離した膜
処理水は処理水槽１４に流出し、膜モジュール１３に捕
捉された固形分は、膜洗浄の際に底部の排水管１３ａか
ら抜取られる。The raw water flowing into the raw water tank 11 from the inflow pipe 21 is supplied from the alkaline substance supply means 12 with Na.
After the pH is controlled in the range of 9 to 10 by OH, the raw water is pumped to the membrane module 13 by the raw water pressurizing pump 15, and the solid content in the raw water is separated. The membrane-treated water from which solids have been separated flows out into the treatment water tank 14, and the solids captured by the membrane module 13 are withdrawn from the bottom drain pipe 13a during membrane washing.
【００１２】原水槽１１において、溶存酸素の存在下で
ｐＨを９〜１０の範囲、好ましくは９．７程度に制御す
ることにより、原水中の溶解性マンガンは、下記の酸化
過程及び加水分解過程を経て不溶性の二酸化マンガンと
なる。In the raw water tank 11, by controlling the pH in the range of 9 to 10, preferably about 9.7 in the presence of dissolved oxygen, the soluble manganese in the raw water can be subjected to the following oxidation and hydrolysis processes. To form insoluble manganese dioxide.
【００１３】Ｍｎ２＋＋２（ＯＨ）−＋１／２Ｏ２＋Ｈ
２Ｏ→Ｍｎ（ＯＨ）４ Ｍｎ（ＯＨ）４→ＭｎＯ２↓＋２Ｈ２ＯMn 2+ +2 (OH) − + 1 / 2O 2 + H
2 O → Mn (OH) 4 Mn (OH) 4 → MnO 2 ↓ + 2H 2 O
【００１４】なお、２価マンガンは、ｐＨを９〜１０程
度まで上げても生成するＭｎ（ＯＨ）２の溶解度が１０
０ｍｇ／Ｌ程度であり、水酸化物としてマンガンを不溶
化するするには、さらにｐＨを高める必要があって実用
的ではない。しかし、ｐＨが９〜１０の条件では、溶存
酸素が付加される酸化及び加水分解による反応が進行
し、マンガンが二酸化マンガンの形で析出する。[0014] Divalent manganese has a solubility of Mn (OH) 2 of 10 even when the pH is raised to about 9 to 10.
It is about 0 mg / L, and in order to insolubilize manganese as a hydroxide, it is necessary to further raise the pH, which is not practical. However, when the pH is 9 to 10, the reaction by oxidation and hydrolysis to which dissolved oxygen is added proceeds, and manganese precipitates in the form of manganese dioxide.
【００１５】このとき、マンガンの酸化過程は、マンガ
ン濃度に関する一次反応形の式で表される。At this time, the oxidation process of manganese is represented by a primary reaction type equation relating to the manganese concentration.
【００１６】ｄＣ／ｄｔ＝−αＣ ・・・（１） Ｃ＝Ｃ０ｅｘｐαｔ ・・・（２） 式中、Ｃ０は初期マンガン濃度［ｍｇ／Ｌ］、Ｃは処理
後のマンガン濃度［ｍｇ／Ｌ］、ｔは反応時間［ｈ］、
αはマンガン除去速度係数［ｈ−１］である。DC / dt = -αC (1) C = C 0 exp αt (2) where C 0 is an initial manganese concentration [mg / L], and C is a manganese concentration after treatment [ mg / L], t is the reaction time [h],
α is a manganese removal rate coefficient [h −1 ].
【００１７】さらに、マンガン除去速度係数αは、水素
イオン濃度［Ｈ＋］あるいは水酸イオン濃度［ＯＨ−］
と溶存酸素濃度Ｄとに支配され、次式で表される。Further, the manganese removal rate coefficient α is determined by the hydrogen ion concentration [H + ] or the hydroxyl ion concentration [OH − ].
And the dissolved oxygen concentration D, and are expressed by the following equation.
【００１８】 α＝ｋ（Ｔ）［Ｈ＋］［Ｈ＋］−β（Ｔ） ・・・（３） α＝ｋ（Ｔ）［ＯＨ−］［ＯＨ−］β（Ｔ） ・・・（４） ｋ（Ｔ）＝λ（Ｔ）Ｄ ・・・（５） 式中、ｋ（Ｔ）、β（Ｔ）及びλ（Ｔ）は温度Ｔのとき
の定数である。[0018] α = k (T) [H +] [H +] -β (T) ··· (3) α = k (T) [OH -] [OH -] β (T) ··· ( 4) k (T) = λ (T) D (5) where k (T), β (T) and λ (T) are constants at the temperature T.
【００１９】例えば、水温が２４℃のときは、β（２４
℃）＝１．３５、λ（２４℃）［Ｈ＋］＝５．１×１０
−１５、λ（２４℃）［ＯＨ−］＝２．６×１０４とな
り、水温の変化によって各定数の値は多少変化する。For example, when the water temperature is 24 ° C., β (24
° C) = 1.35, λ (24 ° C) [H + ] = 5.1 × 10
−15 , λ (24 ° C.) [OH − ] = 2.6 × 10 4 , and the value of each constant slightly changes due to a change in water temperature.
【００２０】このように、溶存酸素の存在下でｐＨを適
切な値に制御することにより、原水中の溶解性マンガン
を、膜モジュール１３で分離除去が可能な粒径０．８μ
ｍ以上の二酸化マンガンとして析出させることができ
る。したがって、濁質除去用として用いられている分画
径０．１μｍ程度の精密ろ過膜でろ過処理を行うことに
より、生成した二酸化マンガンを濁質とともに分離除去
することができ、膜処理水中のマンガン量を水道水に適
した０．０１ｍｇ／Ｌ以下にできるとともに、濁質の除
去も同時に行うことができる。As described above, by controlling the pH to an appropriate value in the presence of dissolved oxygen, the soluble manganese in the raw water can be separated and removed by the membrane module 13 with a particle size of 0.8 μm.
m or more of manganese dioxide. Therefore, by performing a filtration treatment with a microfiltration membrane having a fractionation diameter of about 0.1 μm used for turbidity removal, the produced manganese dioxide can be separated and removed together with the turbidity. The amount can be adjusted to 0.01 mg / L or less suitable for tap water, and turbidity can be removed at the same time.
【００２１】なお、ｐＨを高くすることによって生成す
る二酸化マンガン粒子の径を大きくすることができる
が、ｐＨが１０以上、例えばｐＨが１０．２になると、
原水中のカルシウムが膜目詰まりを起こす微小粒子とな
って析出するため、膜モジュール１３における差圧が上
昇して運転に支障を来し、ｐＨが９未満では溶解性マン
ガンを二酸化マンガンにすることが困難となる。The diameter of the manganese dioxide particles generated by increasing the pH can be increased. However, when the pH is 10 or more, for example, when the pH becomes 10.2,
Since calcium in the raw water precipitates as fine particles that cause membrane clogging, the differential pressure in the membrane module 13 increases and hinders operation. If the pH is less than 9, soluble manganese is converted to manganese dioxide. Becomes difficult.
【００２２】図２は、マンガン除去装置における制御系
の一例を示す概略系統図である。この制御系は、原水槽
１１内のｐＨを測定するｐＨ測定手段２２と、流入原水
中のマンガン濃度を測定するマンガン測定手段２３と、
アルカリ性物質供給手段１２からのアルカリ性物質の供
給量を制御するための制御手段２４とを備えている。本
例では、原水中の溶存酸素濃度及び原水の温度が略一定
の場合、制御手段２４は、前記式（１）〜（５）を用い
て除去すべき溶解性マンガン量を計算し、前もって求め
たアルカリ性物質供給量とマンガン除去量との相関関係
を用いてアルカリ性物質供給量を求め、これをアルカリ
性物質供給手段１２に指示して所定量のアルカリ性物質
を原水槽１１内に供給する。FIG. 2 is a schematic system diagram showing an example of a control system in the manganese removing device. The control system includes a pH measuring means 22 for measuring the pH in the raw water tank 11, a manganese measuring means 23 for measuring the manganese concentration in the inflowing raw water,
A control unit 24 for controlling the supply amount of the alkaline substance from the alkaline substance supply unit 12 is provided. In this example, when the concentration of dissolved oxygen in the raw water and the temperature of the raw water are substantially constant, the control means 24 calculates the amount of soluble manganese to be removed using the above equations (1) to (5), and obtains the amount in advance. The supply amount of the alkaline substance is obtained by using the correlation between the supply amount of the alkaline substance and the removal amount of manganese, and this is instructed to the alkaline substance supply means 12 to supply a predetermined amount of the alkaline substance into the raw water tank 11.
【００２３】また、原水中の溶存酸素濃度が変動する場
合は、前記ｐＨ測定手段２２と共に溶存酸素測定手段を
設置し、制御手段２４で、測定した溶存酸素濃度を含め
て前記式（１）〜（５）により除去すべき溶解性マンガ
ン量を計算する。When the dissolved oxygen concentration in the raw water fluctuates, a dissolved oxygen measuring means is installed together with the pH measuring means 22, and the control means 24 includes the dissolved oxygen concentration measured by the formulas (1) to (4). Calculate the amount of soluble manganese to be removed according to (5).
【００２４】さらに、原水の水温が変動する場合は、前
記ｐＨ測定手段２２と共に温度測定手段を設置し、制御
手段２４で、測定した水温を含めて前記式（１）〜
（５）により除去すべき溶解性マンガン量を計算する。Further, when the water temperature of the raw water fluctuates, a temperature measuring means is installed together with the pH measuring means 22, and the control means 24 includes the above formulas (1) to (4) including the measured water temperature.
Calculate the amount of soluble manganese to be removed according to (5).
【００２５】加えて、原水中の溶存酸素濃度及び水温が
変動する場合は、ｐＨ測定手段２２と共に溶存酸素測定
手段及び温度測定手段を設置し、制御手段２４で、測定
した溶存酸素濃度及び測定した水温を含めて前記式
（１）〜（５）により除去すべき溶解性マンガン量を計
算する。In addition, when the dissolved oxygen concentration and the water temperature in the raw water fluctuate, a dissolved oxygen measuring means and a temperature measuring means are installed together with the pH measuring means 22, and the dissolved oxygen concentration and the measured oxygen concentration are measured by the control means 24. The amount of soluble manganese to be removed is calculated by the formulas (1) to (5) including the water temperature.
【００２６】このようにして除去すべき溶解性マンガン
量を算出した後は、前記同様に、前もって求めたアルカ
リ性物質供給量とマンガン除去量との相関関係を用いて
アルカリ性物質供給量を求め、これをアルカリ性物質供
給手段１２に指示して所定量のアルカリ性物質を原水槽
１１内に供給すればよい。After calculating the amount of soluble manganese to be removed in this manner, the amount of alkaline substance supplied is calculated using the correlation between the previously obtained amount of alkaline substance supplied and the amount of manganese removed. Is supplied to the raw material tank 11 by instructing the alkaline substance supply means 12 to supply a predetermined amount of alkaline substance.
【００２７】アルカリ性物質供給量とマンガン除去量と
の相関関係は、あらかじめ初期マンガン濃度やｐＨ、溶
存酸素濃度、水温等の各条件を設定した実験により求め
ておくことができる。さらに、前記制御手段２４におい
て、前記マンガン濃度と、前記溶存酸素濃度と、前記ア
ルカリ性物質供給手段１２からのアルカリ性物質供給量
とをそれぞれ経時的に記憶し、前記マンガン濃度と溶存
酸素濃度とから求めたマンガン除去量と前記アルカリ性
物質供給量との相関関係を求め、求めた相関関係と前記
マンガン濃度とからアルカリ性物質の必要供給量を求め
ることにより、流入原水中のマンガン濃度等が変動して
も確実なマンガン除去を行うことができる。The correlation between the supply amount of the alkaline substance and the removal amount of manganese can be determined by an experiment in which various conditions such as initial manganese concentration, pH, dissolved oxygen concentration, and water temperature are set in advance. Further, in the control means 24, the manganese concentration, the dissolved oxygen concentration, and the supply amount of the alkaline substance from the alkaline substance supply means 12 are respectively stored with time, and are obtained from the manganese concentration and the dissolved oxygen concentration. Determine the correlation between the amount of manganese removed and the supply amount of the alkaline substance, and determine the required supply amount of the alkaline substance from the determined correlation and the manganese concentration, even if the manganese concentration in the influent raw water fluctuates. Manganese can be reliably removed.
【００２８】一方、膜処理水が流入する処理水槽１４に
は、処理水中に空気を供給する空気供給手段であるコン
プレッサー２５及び散気管２６と、膜処理水のｐＨを測
定するｐＨ測定手段２７と、該ｐＨ測定手段２７で測定
したｐＨに基づいて、処理水が中性となるように前記空
気供給手段の空気供給量及び曝気時間を制御する散気量
制御手段２８とが設けられている。On the other hand, in the treated water tank 14 into which the treated water flows, a compressor 25 and an air diffuser 26 serving as air supply means for supplying air into the treated water, and a pH measuring means 27 for measuring the pH of the treated water are provided. And a diffuser controller 28 for controlling the air supply amount and the aeration time of the air supply unit based on the pH measured by the pH measurement unit 27 so that the treated water becomes neutral.
【００２９】すなわち、空気供給手段によって膜処理水
中に空気を供給することにより、空気中の二酸化炭素が
水中に吸収されて中和反応が発生するので、ｐＨが最高
１０程度の膜処理水を中性化することができる。このと
き、ｐＨ測定手段２７で膜処理水のｐＨを測定し、測定
値に基づいて処理水が中性となるように空気供給量及び
曝気時間を制御することにより、処理水のｐＨを効率よ
く下げることができ、また、ｐＨが低くなりすぎること
を防止できる。このようにして処理水のｐＨを下げるこ
とにより、酸等の添加が不要になり、特別な槽を別に設
ける必要もなく、しかも、酸の添加に比べて簡単な操作
でｐＨ調節を行うことができる。That is, by supplying air into the membrane-treated water by the air supply means, carbon dioxide in the air is absorbed into the water and a neutralization reaction occurs. Can be transformed. At this time, the pH of the treated water is measured by the pH measuring means 27, and the pH of the treated water is efficiently controlled by controlling the air supply amount and the aeration time so that the treated water becomes neutral based on the measured value. The pH can be lowered, and the pH can be prevented from becoming too low. By lowering the pH of the treated water in this manner, the addition of an acid or the like becomes unnecessary, there is no need to provide a special tank, and the pH can be adjusted by a simple operation compared to the addition of the acid. it can.
【００３０】[0030]
【発明の効果】以上説明したように、本発明によれば、
簡単な制御で溶解性マンガンを不溶性の二酸化マンガン
にすることができ、膜ろ過によって濁質とともに二酸化
マンガンを除去することができる。As described above, according to the present invention,
Soluble manganese can be converted into insoluble manganese dioxide with simple control, and manganese dioxide can be removed together with turbidity by membrane filtration.
【図１】 本発明のマンガン除去装置の一形態例を示す
系統図である。FIG. 1 is a system diagram showing one embodiment of a manganese removing device of the present invention.
【図２】 マンガン除去装置における制御系の一例を示
す概略系統図である。FIG. 2 is a schematic system diagram showing an example of a control system in the manganese removing device.
１１…原水槽、１２…アルカリ性物質供給手段、１３…
膜モジュール、１４…処理水槽、１５…原水加圧ポン
プ、１６…散気管、１７…エアーポンプ、１８…差圧
計、１９…流量計、２０…制御器、２１…流入管、２２
…ｐＨ測定手段、２３…マンガン測定手段、２４…制御
手段、２５…コンプレッサー、２６…散気管、２７…ｐ
Ｈ測定手段、２８…散気量制御手段11 ... raw water tank, 12 ... alkaline substance supply means, 13 ...
Membrane module, 14 ... treated water tank, 15 ... raw water pressurized pump, 16 ... diffuser pipe, 17 ... air pump, 18 ... differential pressure gauge, 19 ... flow meter, 20 ... controller, 21 ... inflow pipe, 22
... pH measuring means, 23 ... manganese measuring means, 24 ... control means, 25 ... compressor, 26 ... aeration tube, 27 ... p
H measuring means, 28 ... diffused air amount controlling means
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4D038 AA01 AA08 AB66 BA04 BA06 BB13 BB16 BB17 4D050 AA01 AB55 BB01 BD08 CA09 CA13 4G048 AA02 AB02 AB08 AD03 AE01 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D038 AA01 AA08 AB66 BA04 BA06 BB13 BB16 BB17 4D050 AA01 AB55 BB01 BD08 CA09 CA13 4G048 AA02 AB02 AB08 AD03 AE01
Claims (8)
たり、原水にアルカリ性物質を供給してｐＨを９〜１０
に調節し、溶存酸素の存在下で前記溶解性マンガンを不
溶性の二酸化マンガンにした後、生成した二酸化マンガ
ン粒子を膜ろ過によって原水から除去することを特徴と
するマンガンの除去方法。When removing soluble manganese in raw water, an alkaline substance is supplied to the raw water to adjust the pH to 9 to 10.
And converting the soluble manganese into insoluble manganese dioxide in the presence of dissolved oxygen, and then removing the produced manganese dioxide particles from the raw water by membrane filtration.
存酸素濃度、原水の温度、原水のｐＨの少なくともいず
れか一つを測定し、該測定値に応じて前記アルカリ性物
質の供給量を調節することを特徴とする請求項１記載の
マンガンの除去方法。2. A method for measuring at least one of the concentration of manganese in the raw water, the concentration of dissolved oxygen in the raw water, the temperature of the raw water, and the pH of the raw water, and adjusting the supply amount of the alkaline substance according to the measured value. The method for removing manganese according to claim 1, wherein the manganese is removed.
原水槽と、原水中にアルカリ性物質を添加するアルカリ
性物質供給手段と、前記原水槽内の原水又は原水槽に流
入する原水のｐＨを測定するｐＨ測定手段と、該ｐＨ測
定手段で測定したｐＨに基づいて前記アルカリ性物質供
給手段のアルカリ性物質供給量をｐＨが９〜１０の範囲
になるように制御する制御手段と、原水槽から抜出した
原水中の固形物を分離除去する膜分離手段とを備えてい
ることを特徴とするマンガンの除去装置。3. A raw water tank for receiving raw water containing soluble manganese, an alkaline substance supply means for adding an alkaline substance to the raw water, and measuring the pH of the raw water in the raw water tank or the raw water flowing into the raw water tank. pH measurement means, control means for controlling the alkaline substance supply amount of the alkaline substance supply means based on the pH measured by the pH measurement means so that the pH is in the range of 9 to 10, and an element extracted from the raw water tank. A manganese removal device, comprising: a membrane separation means for separating and removing solids in water.
らの処理水を受ける処理水槽と、処理水中に空気を供給
する空気供給手段と、膜処理水のｐＨを測定するｐＨ測
定手段と、該ｐＨ測定手段で測定したｐＨに基づいて前
記空気供給手段の空気供給量を制御する制御手段とを設
けたことを特徴とする請求項３記載のマンガンの除去装
置。4. A treatment water tank for receiving treated water from the membrane separation means, an air supply means for supplying air into the treated water, and a pH measurement means for measuring the pH of the treated water in a stage subsequent to the membrane separation means. 4. A manganese removal apparatus according to claim 3, further comprising control means for controlling an air supply amount of said air supply means based on the pH measured by said pH measurement means.
ン測定手段を備え、前記制御手段は、測定したマンガン
濃度に基づいて前記アルカリ性物質の供給量を調節する
ことを特徴とする請求項３記載のマンガンの除去装置。5. The apparatus according to claim 3, further comprising manganese measuring means for measuring the manganese concentration in the raw water, wherein the control means adjusts the supply amount of the alkaline substance based on the measured manganese concentration. Manganese removal device.
素測定手段を備え、前記制御手段は、測定した溶存酸素
濃度と前記マンガン濃度とに基づいて前記アルカリ性物
質の供給量を調節することを特徴とする請求項５記載の
マンガンの除去装置。6. A dissolved oxygen measuring means for measuring a dissolved oxygen concentration in raw water, wherein the control means adjusts a supply amount of the alkaline substance based on the measured dissolved oxygen concentration and the manganese concentration. The manganese removal apparatus according to claim 5, wherein
え、前記制御手段は、測定した温度と前記マンガン濃度
と前記溶存酸素濃度とに基づいて前記アルカリ性物質の
供給量を調節することを特徴とする請求項６記載のマン
ガンの除去装置。7. A temperature measuring device for measuring a temperature of raw water, wherein the control device adjusts a supply amount of the alkaline substance based on the measured temperature, the manganese concentration, and the dissolved oxygen concentration. The manganese removal device according to claim 6, wherein
前記溶存酸素濃度と、前記アルカリ性物質供給手段から
のアルカリ性物質供給量とをそれぞれ経時的に記憶する
手段と、前記マンガン濃度と溶存酸素濃度とからマンガ
ン除去量を求める手段と、該手段で求めたマンガン除去
量と前記アルカリ性物質供給量との相関関係を求める手
段と、該手段で求めた相関関係と前記マンガン濃度とか
らアルカリ性物質の必要供給量を求める手段とを備えて
いることを特徴とする請求項６記載のマンガンの除去装
置。8. The control device according to claim 1, wherein the manganese concentration is:
Means for storing the dissolved oxygen concentration and the supply amount of the alkaline substance from the alkaline substance supply means with time, means for determining the manganese removal amount from the manganese concentration and the dissolved oxygen concentration, A means for determining a correlation between the manganese removal amount and the supply amount of the alkaline substance; and a means for determining a required supply amount of the alkaline substance from the correlation determined by the means and the manganese concentration. The manganese removal device according to claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000132101A JP2001316118A (en) | 2000-05-01 | 2000-05-01 | Method and apparatus for removing manganese |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000132101A JP2001316118A (en) | 2000-05-01 | 2000-05-01 | Method and apparatus for removing manganese |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001316118A true JP2001316118A (en) | 2001-11-13 |
Family
ID=18640866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000132101A Pending JP2001316118A (en) | 2000-05-01 | 2000-05-01 | Method and apparatus for removing manganese |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001316118A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102311904B1 (en) * | 2021-04-01 | 2021-10-13 | 주식회사 프로솔 | a soluble manganese treatment method using the permanganate and the water treatment system using thereof |
| CN113880319A (en) * | 2021-11-19 | 2022-01-04 | 上海言征分离技术有限公司 | Ammonia nitrogen wastewater treatment method and system |
-
2000
- 2000-05-01 JP JP2000132101A patent/JP2001316118A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102311904B1 (en) * | 2021-04-01 | 2021-10-13 | 주식회사 프로솔 | a soluble manganese treatment method using the permanganate and the water treatment system using thereof |
| CN113880319A (en) * | 2021-11-19 | 2022-01-04 | 上海言征分离技术有限公司 | Ammonia nitrogen wastewater treatment method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3491666B2 (en) | Method and apparatus for controlling TOC component removal | |
| JP4756327B2 (en) | Nitrogen gas dissolved water production method | |
| JPH0994585A (en) | Method for producing ultrapure water and apparatus therefor | |
| JP2013010073A (en) | Method and device for waste water treatment | |
| JP2012183472A (en) | Water treatment apparatus | |
| JP3871749B2 (en) | Treatment method of flue gas desulfurization waste water | |
| JP6591093B1 (en) | Ozone water generation apparatus, water treatment apparatus, ozone water generation method, and cleaning method | |
| JP2001316118A (en) | Method and apparatus for removing manganese | |
| JP6430091B1 (en) | Membrane cleaning apparatus and membrane cleaning method | |
| JP5678436B2 (en) | Ultrapure water production method and apparatus | |
| JP5110013B2 (en) | Method and apparatus for treating fluorine-containing wastewater | |
| JP6279295B2 (en) | Ultrapure water production system and ultrapure water production method | |
| JP2000070962A (en) | Treatment of waste water containing fluorine | |
| JPH1199389A (en) | Treatment of water containing organic component and manganese | |
| JP3433601B2 (en) | Wastewater recovery and purification equipment | |
| JPH10202296A (en) | Ultrapure water producer | |
| JPH03278882A (en) | Method and apparatus for removing dissolved oxygen in water | |
| JP6650817B2 (en) | Method and apparatus for treating wastewater containing organic oxygen scavenger and suspended matter | |
| JP2008237986A (en) | Method for treating boron-containing water | |
| JP2009066465A (en) | Ammoniac nitrogen-containing water treatment system and method | |
| JP2019166459A (en) | Water treatment device and water treatment method | |
| JP2003053357A (en) | Method and device for reducing water containing permanganate | |
| JP3543531B2 (en) | Pressurized ozone treatment equipment | |
| JPH0125675Y2 (en) | ||
| JP2003236363A (en) | Process for hydrothermal oxidation reaction |