JP2002045891A - Agitating device for biological sludge and ozone treating device - Google Patents
Agitating device for biological sludge and ozone treating deviceInfo
- Publication number
- JP2002045891A JP2002045891A JP2000240052A JP2000240052A JP2002045891A JP 2002045891 A JP2002045891 A JP 2002045891A JP 2000240052 A JP2000240052 A JP 2000240052A JP 2000240052 A JP2000240052 A JP 2000240052A JP 2002045891 A JP2002045891 A JP 2002045891A
- Authority
- JP
- Japan
- Prior art keywords
- disk
- biological sludge
- blade
- turbine blade
- ozone
- 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
Landscapes
- Treatment Of Sludge (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は生物汚泥の攪拌装置
に係り、特に、生物汚泥含有液を受け入れて、該生物汚
泥含有液をタービン翼攪拌機で攪拌する生物汚泥の攪拌
装置において、タービン翼への繊維等の絡み付きの問題
が殆どなく、長期に亘り安定に運転を継続することがで
きる生物汚泥の攪拌装置に関する。特に、本発明は生物
汚泥含有液にオゾン含有ガスを接触させ、生物汚泥を減
容化するために用いられる生物汚泥のオゾン処理装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biological sludge agitator, and more particularly to a biological sludge agitator for receiving a biological sludge-containing liquid and agitating the biological sludge-containing liquid with a turbine blade agitator. The present invention relates to a biological sludge stirrer which has almost no problem of entanglement of fibers and the like, and can stably operate for a long period of time. In particular, the present invention relates to a biological sludge ozone treatment apparatus used to reduce the volume of biological sludge by bringing an ozone-containing gas into contact with the biological sludge-containing liquid.
【０００２】[0002]
【従来の技術】有機性排液の好気性又は嫌気性処理等の
生物処理では、活性汚泥、消化汚泥のような生物汚泥が
発生する。この汚泥は生物学的に安定であるため、更に
生物処理により滅容化することが困難である上に、難脱
水性であるため脱水等による処理も困難である。このた
め、このような生物汚泥を滅容化するために、生物汚泥
をオゾン処理して汚泥の細胞を破壊して易生物分解性に
改質した後、元の生物処理装置に戻して生物処理するこ
とが行われている。2. Description of the Related Art Biological sludge such as activated sludge and digested sludge is generated in biological treatment such as aerobic or anaerobic treatment of organic wastewater. Since this sludge is biologically stable, it is difficult to further disintegrate it by biological treatment, and since it is hard to dehydrate, it is difficult to treat it by dehydration or the like. Therefore, in order to decompose such biological sludge, the biological sludge is treated with ozone to destroy the sludge cells and is reformed to be easily biodegradable. That is being done.
【０００３】従来、この生物汚泥のオゾン処理には、被
処理汚泥含有液とオゾン含有ガスとを反応させるための
反応槽と、この反応を促進するために槽内を攪拌する攪
拌機とを備えたオゾン処理装置が用いられており、特開
平１１―９０４９６号公報には、このようなオゾン処理
装置において、反応効率を高めるために槽内を加圧する
加圧手段を設けた装置が提案されている。Conventionally, the ozone treatment of biological sludge includes a reaction tank for reacting the liquid to be treated with the ozone-containing gas and a stirrer for stirring the inside of the tank to promote the reaction. An ozone treatment apparatus is used, and Japanese Patent Application Laid-Open No. H11-90496 proposes such an ozone treatment apparatus provided with a pressurizing means for pressurizing the inside of a tank in order to increase the reaction efficiency. .
【０００４】しかして、従来のオゾン処理装置に設けら
れている攪拌機は、図２（ａ）（平面図），（ｂ）（正
面図）に示す如く、ディスク１と、このディスク１に立
設され、略放射方向に延在した複数の矩形板状の羽根２
とを有したディスクタービン翼である。なお、図２中、
３は攪拌軸（シャフト）である。As shown in FIGS. 2 (a) (plan view) and (b) (front view), a stirrer provided in a conventional ozone treatment apparatus has a disk 1 and an upright standing on the disk 1. And a plurality of rectangular plate-like blades 2 extending substantially in the radial direction.
And a disk turbine blade having: In FIG. 2,
Reference numeral 3 denotes a stirring shaft.
【０００５】[0005]
【発明が解決しようとする課題】図２に示す如く、矩形
板状の羽根２を設けた従来のディスクタービン翼では、
生物汚泥のオゾン処理に当たり、羽根２のディスク１へ
の取付部（図２（ｂ）のＳ部）に生物汚泥のし渣や繊維
等が絡み付き、これによりディスクタービン翼の回転が
不安定となるため、定期的に或いは必要に応じて装置の
運転を停止して絡み付いた繊維等を除去する必要があっ
た。As shown in FIG. 2, in a conventional disk turbine blade provided with a blade 2 in the form of a rectangular plate,
During the ozone treatment of the biological sludge, the residue of the biological sludge, fibers, and the like are entangled with the attachment portion of the blade 2 to the disk 1 (S portion in FIG. 2B), and the rotation of the disk turbine blade becomes unstable. For this reason, it has been necessary to stop the operation of the apparatus regularly or as necessary to remove entangled fibers and the like.
【０００６】同様の問題はオゾン処理装置に限らず、生
物汚泥含有液を受け入れてタービン翼で攪拌する生物汚
泥の攪拌装置でも生じており、特に生物汚泥に繊維など
の夾雑物が多く含まれる場合に顕著である。[0006] The same problem occurs not only in the ozone treatment apparatus but also in a biological sludge stirring apparatus which receives a biological sludge-containing liquid and agitates it with a turbine blade. Particularly when the biological sludge contains a large amount of impurities such as fibers. Is remarkable.
【０００７】本発明は上記従来の問題点を解決し、ディ
スクタービン翼への繊維等の絡み付きの問題が殆どな
く、長期に亘り安定に運転を継続することができる生物
汚泥の攪拌装置及びオゾン処理装置を提供することを目
的とする。SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, has little problem of entanglement of fibers or the like with a disk turbine blade, and can stably operate a biological sludge for a long period of time and ozone treatment. It is intended to provide a device.
【０００８】[0008]
【課題を解決するための手段】本発明の生物汚泥の攪拌
装置は、生物汚泥含有液を受け入れて、該生物汚泥を攪
拌する、タービン翼攪拌機を有する生物汚泥の攪拌装置
において、該攪拌機としてのタービン翼は、ディスク
と、該ディスクに立設され、略放射方向に延在した羽根
とを有したディスクタービン翼であって、該羽根のディ
スク軸心側の辺縁がディスク面に近づくほどディスク軸
心に接近するように傾斜していることを特徴とするもの
である。SUMMARY OF THE INVENTION A biological sludge agitator according to the present invention is a biological sludge agitator having a turbine blade agitator for receiving a biological sludge-containing liquid and agitating the biological sludge. The turbine blade is a disk turbine blade having a disk and blades erected on the disk and extending in a substantially radial direction. The disk blade is configured such that the edge of the blade closer to the disk axis approaches the disk surface. It is characterized by being inclined so as to approach the axis.
【０００９】また、本発明の生物汚泥のオゾン処理装置
は、生物汚泥含有液を受け入れて、該生物汚泥含有液に
オゾン含有ガスを接触させる、タービン翼攪拌機を有す
る生物汚泥のオゾン処理装置において、該攪拌機として
のタービン翼は、ディスクと、該ディスクに立設され、
略放射方向に延在した羽根とを有したディスクタービン
翼であって、該羽根のディスク軸心側の辺縁がディスク
面に近づくほどディスク軸心に接近するように傾斜して
いることを特徴とする。The biosludge ozonation apparatus of the present invention is a biosludge ozone treatment apparatus having a turbine blade stirrer for receiving a biological sludge-containing liquid and bringing the ozone-containing gas into contact with the biological sludge-containing liquid. The turbine blade as the stirrer has a disk, and is erected on the disk,
A disk turbine blade having blades extending in a substantially radial direction, wherein the blades are inclined so that the edge on the disk axis side approaches the disk axis as approaching the disk surface. And
【００１０】本発明の攪拌装置及びオゾン処理装置のデ
ィスクタービン翼に設けられた羽根は、ディスク軸心側
の辺縁がディスク面に近づくほどディスク軸心に接近す
るように傾斜している、即ち、繊維等が絡み付き易い、
ディスク面への羽根の立設部が傾斜面とされているた
め、この部分への繊維等の絡み付きが防止される。The blades provided on the disk turbine blades of the stirring device and the ozone treatment device of the present invention are inclined so that the edge closer to the disk axis approaches the disk surface as the edge approaches the disk surface. , Fibers and the like are easily entangled,
Since the standing portion of the blade on the disk surface is formed as an inclined surface, entanglement of fibers or the like with this portion is prevented.
【００１１】なお、以下において、本発明に係るディス
クタービン翼の羽根の、傾斜しているディスク軸心側の
辺縁部分を「傾斜辺」と称する場合がある。In the description below, the edge of the blade of the disk turbine blade according to the present invention on the side of the inclined disk axis may be referred to as the “inclined side”.
【００１２】[0012]
【発明の実施の形態】以下にオゾン処理装置について図
面を参照して本発明の実施の形態を詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１３】なお、オゾンガスの供給を省略すれば、以
下の説明は本発明の生物汚泥の攪拌装置の説明となる。If the supply of ozone gas is omitted, the following description will be directed to the biological sludge stirring apparatus of the present invention.
【００１４】図１（ａ），（ｂ）は本発明の生物汚泥の
オゾン処理装置に設けられる攪拌機としてのディスクタ
ービン翼の実施の形態を示す図であって、（ａ）図は平
面図、（ｂ）図は正面図である。図３はこのようなディ
スクタービン翼が設けられた本発明の生物汚泥のオゾン
処理装置の実施の形態を示す構成図である。FIGS. 1A and 1B are views showing an embodiment of a disk turbine blade as a stirrer provided in the biological sludge ozone treatment apparatus of the present invention, wherein FIG. 1A is a plan view, (B) is a front view. FIG. 3 is a configuration diagram showing an embodiment of the biological sludge ozone treatment apparatus of the present invention provided with such a disk turbine blade.
【００１５】このディスクタービン翼は、ディスク１
と、このディスク１に立設され、略放射方向に延在した
複数枚（図１では４枚）の羽根４とを有し、羽根４のデ
ィスク軸心（攪拌軸３）側の辺縁がディスク面に近づく
ほどディスク軸心に接近するように傾斜した傾斜辺４Ａ
となっている。The disk turbine blade is a disk 1
And a plurality (four in FIG. 1) of blades 4 erected on the disk 1 and extending substantially in the radial direction. The edge of the blade 4 on the disk axis (stirring shaft 3) side is Inclined side 4A inclined so as to approach the disk axis as approaching the disk surface
It has become.
【００１６】このように、羽根４のディスク１への取り
付け部の立ち上がり部分が傾斜辺４Ａとされたディスク
タービン翼であれば、繊維等が引っ掛かり難く、このた
め繊維等の絡み付きが防止される。As described above, if the rising portion of the mounting portion of the blade 4 to the disk 1 is the disk turbine blade having the inclined side 4A, the fibers and the like are not easily caught, and the fibers and the like are prevented from being entangled.
【００１７】本発明に係るディスクタービン翼におい
て、羽根の枚数には特に制限はなく、通常の場合、４〜
８枚程度の羽根が均等位置に設けられる。また、各部の
寸法等についても特に制限はないが、一般的には、次の
ような範囲とするのが好ましく、オゾン反応槽内でのデ
ィスクタービン翼の回転数は３００〜７００ｒｐｍの範
囲とするのが好ましい。 羽根外径Ｄ：反応槽内径×０．３〜０．４ ディスク径ｄ：反応槽内径×０．２５〜０．３ 羽根の板圧：４〜６ｍｍ 羽根高さＨ２：羽根外径Ｄ×０．２〜０．３ 羽根長さＬ２：羽根外径Ｄ×０．２〜０．３５ 傾斜角θ：４５〜６０° 羽根とディスクとの関係：Ｌ１／Ｌ２＝０．５ Ｈ１／Ｈ２＝０．５In the disk turbine blade according to the present invention, the number of blades is not particularly limited.
About eight blades are provided at equal positions. In addition, although there is no particular limitation on the size of each part, it is generally preferable to set the following range, and the rotation speed of the disk turbine blade in the ozone reaction tank is set to a range of 300 to 700 rpm. Is preferred. Blade outer diameter D: Reaction vessel inside diameter × 0.3 to 0.4 disc diameter d: plate thickness of the reactor internal diameter × 0.25-0.3 blades: 4 to 6 mm blade height H 2: blade outer diameter D × 0.2 to 0.3 Blade length L 2 : Blade outer diameter D × 0.2 to 0.35 Inclination angle θ: 45 to 60 ° Relationship between blade and disk: L 1 / L 2 = 0.5 H 1 / H 2 = 0.5
【００１８】なお、本発明の生物汚泥のオゾン処理装置
は、攪拌機として、図１に示すようなディスクタービン
翼が設けられていること以外は従来のオゾン処理装置と
同様の構成とされるが、本発明は特に０．０５〜０．５
ＭＰａ、好ましくは０．１〜０．２ＭＰａの加圧下で生
物汚泥含有液にオゾン含有ガスを接触させるオゾン処理
装置であることが好ましい。The biological sludge ozonation apparatus of the present invention has the same configuration as a conventional ozone treatment apparatus except that a disk turbine blade as shown in FIG. 1 is provided as a stirrer. The present invention is particularly suitable for 0.05-0.5
It is preferable that the apparatus is an ozone treatment apparatus in which an ozone-containing gas is brought into contact with a biological sludge-containing liquid under a pressure of MPa, preferably 0.1 to 0.2 MPa.
【００１９】図３に図１の攪拌装置を有する本発明のオ
ゾン処理装置を示す。FIG. 3 shows an ozone treatment apparatus of the present invention having the stirring apparatus of FIG.
【００２０】図３において、生物汚泥含有液は被処理汚
泥路１１からオゾン反応槽１２内に導入される。オゾン
反応槽１２にはオゾン発生機１３からオゾン注入路１４
を通してオゾンが供給され、生物汚泥含有液はオゾン反
応槽１２内でモータ１５で回転される攪拌装置１６によ
り攪拌され、オゾン含有ガスと接触し、処理汚泥路１７
から排出される。In FIG. 3, a biological sludge-containing liquid is introduced into an ozone reactor 12 from a sludge passage 11 to be treated. The ozone reactor 12 is provided with an ozone injection passage 14 from an ozone generator 13.
Ozone is supplied through the reactor, and the biological sludge-containing liquid is stirred by the stirring device 16 rotated by the motor 15 in the ozone reaction tank 12, comes into contact with the ozone-containing gas, and is subjected to the treatment sludge passage 17.
Is discharged from
【００２１】なお、図２に示す攪拌機が設けられた従来
の生物汚泥のオゾン処理装置（反応槽内径４５ｃｍ）の
攪拌機を図１に示す本発明に係る攪拌機（各部の寸法は
以下の通り）に交換し、回転数５００ｒｐｍで０．１２
ＭＰａの加圧下に生物汚泥含有液のオゾン処理を行った
ところ、従来にあっては、３０〜６０日に１回の頻度で
装置の運転を停止して攪拌機に絡み付いた繊維等を除去
する必要があったが、攪拌機を交換することにより３０
０日以上繊維等の絡み付きの問題もなく、安定に運転を
継続することができた。 ［攪拌機寸法等］ 羽根枚数：４枚 羽根外径Ｄ：１８ｃｍ ディスク径ｄ：１３ｃｍ 羽根の板厚＝４ｍｍ 羽根高さＨ２：４ｃｍ 羽根長さＬ２：５ｃｍ 傾斜角θ：４５° Ｌ１／Ｌ２＝０．５ Ｈ１／Ｈ２＝０．５In addition, the stirrer of the conventional biological sludge ozone treatment apparatus (reactor tank inner diameter 45 cm) provided with the stirrer shown in FIG. 2 is replaced with the stirrer according to the present invention shown in FIG. 1 (the dimensions of each part are as follows). Replace with 0.12 at 500 rpm
When the biological sludge-containing liquid was subjected to ozone treatment under a pressure of MPa, conventionally, it was necessary to stop the operation of the apparatus once every 30 to 60 days to remove fibers and the like entangled in the stirrer. There was a 30
The operation could be stably continued without the problem of entanglement of fibers or the like for 0 days or more. [Agitator dimensions etc.] Number of blades: 4 Blade outer diameter D: 18 cm Disk diameter d: 13 cm Blade thickness = 4 mm Blade height H 2 : 4 cm Blade length L 2 : 5 cm Tilt angle θ: 45 ° L 1 / L 2 = 0.5 H 1 / H 2 = 0.5
【００２２】[0022]
【発明の効果】以上詳述した通り、本発明の生物汚泥の
オゾン処理装置は、ディスクタービン翼への繊維等の絡
み付きの問題が殆どないため、長期に亘り安定に運転を
継続することができ、装置の稼動効率及び処理効率の大
幅な向上を図ることができる。As described in detail above, the biological sludge ozone treatment apparatus of the present invention has a problem of entanglement of fibers or the like with the disk turbine blades, and therefore can be stably operated for a long period of time. In addition, the operating efficiency and processing efficiency of the apparatus can be significantly improved.
【図１】本発明の生物汚泥の攪拌装置及びオゾン処理装
置に設けられる攪拌機としてのディスクタービン翼の実
施の形態を示す図であって、（ａ）図は平面図、（ｂ）
図は正面図である。FIG. 1 is a view showing an embodiment of a disk turbine blade as a stirrer provided in a biological sludge stirrer and an ozone treatment apparatus according to the present invention, wherein FIG. 1 (a) is a plan view and FIG.
The figure is a front view.
【図２】従来のオゾン処理装置のディスクタービン翼を
示す図であって、（ａ）図は平面図、（ｂ）図は正面図
である。FIG. 2 is a view showing a disk turbine blade of a conventional ozone treatment apparatus, wherein FIG. 2 (a) is a plan view and FIG. 2 (b) is a front view.
【図３】本発明の生物汚泥のオゾン処理装置の実施の形
態を示す構成図である。FIG. 3 is a configuration diagram showing an embodiment of the biological sludge ozonation apparatus of the present invention.
１ ディスク ２，４ 羽根 ３ 攪拌軸 １１ 被処理汚泥路 １２ オゾン反応槽 １３ オゾン発生機 １４ オゾン注入路 １５ モータ １６ 攪拌装置 １７ 処理汚泥路 DESCRIPTION OF SYMBOLS 1 Disk 2, 4 blade 3 Stirring shaft 11 Sludge passage to be treated 12 Ozone reactor 13 Ozone generator 14 Ozone injection passage 15 Motor 16 Stirrer 17 Treatment sludge passage
フロントページの続き (72)発明者 深瀬 哲朗 東京都新宿区西新宿三丁目４番７号 栗田 工業株式会社内 Ｆターム(参考） 4D059 AA03 BC10 BJ01 DA43 4G078 AA13 AB20 BA05 CA01 CA12 DA17 DB10 Continuation of the front page (72) Inventor Tetsuro Fukase 3-4-7 Nishi-Shinjuku, Shinjuku-ku, Tokyo Kurita Industry Co., Ltd. F-term (reference) 4D059 AA03 BC10 BJ01 DA43 4G078 AA13 AB20 BA05 CA01 CA12 DA17 DB10
Claims (2)
泥を攪拌する、タービン翼攪拌機を有する生物汚泥の攪
拌装置において、 該攪拌機としてのタービン翼は、ディスクと、該ディス
クに立設され、略放射方向に延在した羽根とを有したデ
ィスクタービン翼であって、 該羽根のディスク軸心側の辺縁がディスク面に近づくほ
どディスク軸心に接近するように傾斜していることを特
徴とする生物汚泥の攪拌装置。1. A biological sludge stirrer having a turbine blade stirrer that receives a biological sludge-containing liquid and stirs the biological sludge, wherein a turbine blade as the stirrer is erected on a disk and the disk, A disk turbine blade having blades extending in a substantially radial direction, wherein the blades are inclined so that the edges on the disk axis side approach the disk axis as they approach the disk surface. A biological sludge stirring device.
泥含有液にオゾン含有ガスを接触させる、タービン翼攪
拌機を有する生物汚泥のオゾン処理装置において、 該攪拌機としてのタービン翼は、ディスクと、該ディス
クに立設され、略放射方向に延在した羽根とを有したデ
ィスクタービン翼であって、 該羽根のディスク軸心側の辺縁がディスク面に近づくほ
どディクス軸心に接近するように傾斜していることを特
徴とする生物汚泥のオゾン処理装置。2. An ozone treatment apparatus for biological sludge having a turbine blade stirrer for receiving a biological sludge-containing liquid and bringing an ozone-containing gas into contact with the biological sludge-containing liquid, wherein the turbine blade as the stirrer includes a disk, A disk turbine blade having a blade standing upright on the disk and extending in a substantially radial direction, the blade being closer to the disk axis as the edge of the blade closer to the disk axis approaches the disk surface. A biological sludge ozonation device characterized by being inclined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000240052A JP4599686B2 (en) | 2000-08-08 | 2000-08-08 | Biological sludge agitation device and ozone treatment device |
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| JP2000240052A JP4599686B2 (en) | 2000-08-08 | 2000-08-08 | Biological sludge agitation device and ozone treatment device |
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| JP2002045891A true JP2002045891A (en) | 2002-02-12 |
| JP4599686B2 JP4599686B2 (en) | 2010-12-15 |
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| JP2000240052A Expired - Fee Related JP4599686B2 (en) | 2000-08-08 | 2000-08-08 | Biological sludge agitation device and ozone treatment device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011240230A (en) * | 2010-05-17 | 2011-12-01 | Hitachi Plant Technologies Ltd | Operation method of agitator |
| JP2012215132A (en) * | 2011-03-31 | 2012-11-08 | Keihin Corp | Intake manifold for internal combustion engine |
| JP2015096250A (en) * | 2013-11-15 | 2015-05-21 | 株式会社神鋼環境ソリューション | Method of removing residue from stirrer of methane fermentation tank and methane fermentation tank allowing easy removal of residue from stirrer |
| JP7442477B2 (en) | 2021-03-09 | 2024-03-04 | 三菱電機株式会社 | Sludge treatment equipment and sludge treatment method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06315700A (en) * | 1993-04-30 | 1994-11-15 | Tsutomu Yasuda | Sludge granulating and concentrating device |
| JPH08192197A (en) * | 1995-01-18 | 1996-07-30 | Meidensha Corp | Method and device for treating sludge using ozone |
| JP2000107789A (en) * | 1998-10-09 | 2000-04-18 | L'air Liquide | Apparatus for stirring liquid in reactor and injecting gas into this liquid |
-
2000
- 2000-08-08 JP JP2000240052A patent/JP4599686B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06315700A (en) * | 1993-04-30 | 1994-11-15 | Tsutomu Yasuda | Sludge granulating and concentrating device |
| JPH08192197A (en) * | 1995-01-18 | 1996-07-30 | Meidensha Corp | Method and device for treating sludge using ozone |
| JP2000107789A (en) * | 1998-10-09 | 2000-04-18 | L'air Liquide | Apparatus for stirring liquid in reactor and injecting gas into this liquid |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011240230A (en) * | 2010-05-17 | 2011-12-01 | Hitachi Plant Technologies Ltd | Operation method of agitator |
| JP2012215132A (en) * | 2011-03-31 | 2012-11-08 | Keihin Corp | Intake manifold for internal combustion engine |
| JP2015096250A (en) * | 2013-11-15 | 2015-05-21 | 株式会社神鋼環境ソリューション | Method of removing residue from stirrer of methane fermentation tank and methane fermentation tank allowing easy removal of residue from stirrer |
| JP7442477B2 (en) | 2021-03-09 | 2024-03-04 | 三菱電機株式会社 | Sludge treatment equipment and sludge treatment method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4599686B2 (en) | 2010-12-15 |
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