JPH11686A - Method and apparatus for treating organic waste liquid - Google Patents
Method and apparatus for treating organic waste liquidInfo
- Publication number
- JPH11686A JPH11686A JP15663797A JP15663797A JPH11686A JP H11686 A JPH11686 A JP H11686A JP 15663797 A JP15663797 A JP 15663797A JP 15663797 A JP15663797 A JP 15663797A JP H11686 A JPH11686 A JP H11686A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- solubilization
- liquid
- aeration tank
- solubilization tank
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
Landscapes
- Activated Sludge Processes (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、有機性汚泥を含む
廃液、例えば、下水処理場、屎尿処理場などから排出さ
れる生汚泥や生物性汚泥、食品工場、化学工場などの廃
水処理プロセスから排出される有機性汚泥を含有する有
機性廃液を生物消化により処理する方法及びその装置に
関する。The present invention relates to a waste liquid containing organic sludge, for example, raw sludge or biological sludge discharged from a sewage treatment plant or a human waste treatment plant, a waste water treatment process of a food factory, a chemical factory, etc. The present invention relates to a method and an apparatus for treating an organic waste liquid containing discharged organic sludge by biological digestion.
【０００２】[0002]
【従来の技術および発明が解決しようとする課題】従来
より、この種の有機性廃液の処理方法として、好気性消
化法、嫌気性メタン消化法などの好気性または嫌気性の
微生物分解により、有機性汚泥の有機成分を生物消化し
て、有機物を炭酸ガス、メタンガスなどのガス成分とす
ると共に、生物消化により生じた微生物バイオマス（微
生物菌体が主体）ならびに未処理の残存汚泥からなる余
剰汚泥を含んだ処理汚泥を、沈殿槽などで固液分離する
ことにより処理液は適宜処理される一方、余剰汚泥は、
通常、海洋投棄または陸地埋立によって処理されてい
る。しかしながら、海洋に投棄することは、環境破壊に
もつながることになるため、地球環境保護が叫ばれてい
る昨今においては、ほとんど禁止される方向にある。ま
た、陸地埋立においても、埋立処分地の確保が年々困難
になってきている。2. Description of the Related Art Conventionally, organic waste liquids of this type have been treated by aerobic or anaerobic microbial decomposition such as aerobic digestion and anaerobic methane digestion. Bio-digestion of organic components of anaerobic sludge to convert organic matter into gas components such as carbon dioxide gas and methane gas, as well as surplus sludge consisting of microbial biomass (mainly microbial cells) generated by biological digestion and untreated residual sludge The treated liquid is appropriately treated by solid-liquid separation of the contained treated sludge in a sedimentation tank or the like, while excess sludge is
It is usually treated by ocean dumping or land reclamation. However, dumping into the ocean will lead to environmental destruction, and in recent years when global environmental protection is being called for, it is almost banned. Also, in land reclamation, it is becoming increasingly difficult to secure landfill sites every year.
【０００３】そこで、本出願人は、発生する余剰汚泥の
量を極めて低減できる活性汚泥処理方法及びそのための
装置に関する発明として、図４に示すように、「有機性
廃液貯留槽１から送られる有機性廃液を曝気槽２にて好
気性生物処理をした後、この処理液を固液分離装置３に
て処理水と汚泥に固液分離し、固液分離装置３で分離さ
れた汚泥の一部を環流経路４を経て曝気槽２に返送し、
固液分離装置３で分離された汚泥のうち余剰汚泥を熱交
換器５で熱交換した後、可溶化槽６にて高温で可溶化
し、可溶化槽６で可溶化された処理液を返送経路７を経
て曝気槽２に返送すること」を特徴とする活性汚泥処理
方法およびそのための装置に関する特許出願をした（特
願平７−１６３３５５号）。Accordingly, the present applicant has proposed, as an invention relating to an activated sludge treatment method and an apparatus therefor capable of extremely reducing the amount of generated excess sludge, as shown in FIG. Aerobic biological treatment of the effluent waste liquid in the aeration tank 2, the treated liquid is solid-liquid separated into treated water and sludge by the solid-liquid separator 3, and a part of the sludge separated by the solid-liquid separator 3 Is returned to the aeration tank 2 via the circulation path 4,
Excess sludge among the sludge separated by the solid-liquid separation device 3 is heat-exchanged in the heat exchanger 5, then solubilized at a high temperature in the solubilization tank 6, and the treatment liquid solubilized in the solubilization tank 6 is returned. (Returning to aeration tank 2 via route 7) "and a patent application for a method for treating activated sludge and an apparatus therefor (Japanese Patent Application No. 7-163355).
【０００４】しかし、上記公報に記載された方法におけ
る可溶化槽６内の温度は６０〜７０℃であり、かなりの
高温であるため酸素溶解度が低いので、可溶化槽内の好
熱性微生物に必要量の酸素を供給するには、可溶化槽に
供給する空気量を多量にせざるを得ない。その結果、大
気中に放散される排ガスとともに可溶化槽の保有熱が奪
い去られるという不都合もある。However, the temperature in the solubilization tank 6 in the method described in the above-mentioned publication is 60 to 70 ° C., and since it is a considerably high temperature, the oxygen solubility is low. In order to supply a sufficient amount of oxygen, the amount of air supplied to the solubilization tank must be increased. As a result, there is also an inconvenience that the heat retained in the solubilization tank is removed along with the exhaust gas that is released into the atmosphere.
【０００５】また、曝気槽と可溶化槽に必要な空気はそ
れぞれ別々の経路から供給されており、この点からも従
来の方法は、汚泥を生物学的に酸化分解するために多量
の空気が使用されていた。[0005] Further, the air required for the aeration tank and the solubilization tank are supplied from separate channels, and from this point too, the conventional method requires a large amount of air to biologically oxidize and decompose sludge. Had been used.
【０００６】本発明は従来の技術の有するこのような問
題点に鑑みてなされたものであって、その目的は、有機
性汚泥を含む廃液を生物学的に処理するに際して、供給
空気量を低減することができる有機性廃液の処理方法及
びその処理装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to reduce the amount of air supplied when biologically treating waste liquid containing organic sludge. It is an object of the present invention to provide a method for treating an organic waste liquid and a treatment apparatus therefor.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に本発明の要旨は、可溶化槽を密閉状態とし、可溶化槽
に高圧空気を通入し、この高圧空気を曝気槽に送給する
方法を採用することにより、可溶化槽の酸素溶解効率が
大きくなるため、供給空気量を低減することができる。In order to achieve the above object, the gist of the present invention is to make a solubilizing tank hermetically closed, to pass high-pressure air into the solubilizing tank, and to supply the high-pressure air to an aeration tank. By adopting this method, the oxygen dissolving efficiency of the solubilization tank is increased, so that the amount of supplied air can be reduced.
【０００８】[0008]
【発明の実施の形態】すなわち、本発明の要旨は、有機
性廃液を曝気槽にて好気性生物処理をした後、この処理
液を固液分離装置にて処理水と汚泥に固液分離し、上記
固液分離装置で分離された汚泥の一部を環流経路を経て
曝気槽に返送し、上記固液分離装置で分離された汚泥の
うち余剰汚泥を可溶化槽にて高温で可溶化し、可溶化さ
れた処理液を返送経路を経て曝気槽に返送する有機性廃
液の処理方法において、可溶化槽を密閉状態とし、可溶
化槽に通入した高圧空気を曝気槽に通入することを特徴
とする有機性廃液の処理方法を第一の発明とし、曝気
槽、固液分離装置および可溶化槽をこの順で配して相互
に接続し、上記固液分離装置で分離された汚泥の一部を
曝気槽に返送するための環流経路と、上記可溶化槽で可
溶化された処理液を曝気槽に返送するための返送経路と
を設けた有機性廃液の処理装置において、可溶化槽を密
閉状態とし、可溶化槽に通入する高圧空気を、可溶化槽
と曝気槽を接続する管路を経て曝気槽に通入可能とした
ことを特徴とする有機性廃液の処理装置を第二の発明と
する。DESCRIPTION OF THE PREFERRED EMBODIMENTS That is, the gist of the present invention is that an organic waste liquid is subjected to aerobic biological treatment in an aeration tank, and then this treated liquid is separated into treated water and sludge by a solid-liquid separator. A part of the sludge separated by the solid-liquid separator is returned to the aeration tank via the circulation path, and excess sludge of the sludge separated by the solid-liquid separator is solubilized at a high temperature in the solubilization tank. In the method for treating an organic waste liquid, in which the solubilized treatment liquid is returned to the aeration tank via a return path, the solubilization tank is sealed, and high-pressure air that has passed through the solubilization tank is passed into the aeration tank. The first aspect of the present invention is a method for treating an organic waste liquid, wherein an aeration tank, a solid-liquid separation device, and a solubilization tank are arranged in this order and connected to each other, and the sludge separated by the solid-liquid separation device is used. A reflux path for returning part of the solution to the aeration tank, and the processing solution solubilized in the solubilization tank. In an organic waste liquid treatment apparatus provided with a return path for returning to an air tank, the solubilization tank is sealed, and high-pressure air flowing into the solubilization tank is connected to the pipe connecting the solubilization tank and the aeration tank. A second aspect of the present invention is an organic waste liquid treatment apparatus characterized in that the apparatus can be passed through an aeration tank via a passage.
【０００９】上記のように構成される本発明の有機性廃
液の処理方法及びその処理装置によれば、有機性廃液を
好気性生物処理した後、この処理液を処理水と汚泥に固
液分離し、次いで、余剰汚泥を可溶化槽にて高温で可溶
化処理した後、可溶化槽に通入した高圧空気を曝気槽に
導入し、好気性生物処理をする。このように、可溶化槽
には高圧空気が通入されるので、可溶化槽の酸素溶解効
率は大きくなり、また、可溶化槽に通入した空気が曝気
槽の曝気空気として利用されるので、装置への供給空気
量を低減することが可能になる。その結果、排ガスとと
もに大気中に持ち出される可溶化槽の保有熱量を削減す
ることが可能になる。According to the method and apparatus for treating an organic waste liquid according to the present invention, the organic waste liquid is subjected to aerobic biological treatment, and then the treated liquid is separated into treated water and sludge by solid-liquid separation. Then, after the excess sludge is solubilized at a high temperature in the solubilization tank, high-pressure air that has passed through the solubilization tank is introduced into the aeration tank to perform aerobic biological treatment. As described above, since high-pressure air is introduced into the solubilization tank, the oxygen dissolving efficiency of the solubilization tank increases, and the air that has passed through the solubilization tank is used as aeration air in the aeration tank. Thus, the amount of air supplied to the device can be reduced. As a result, it is possible to reduce the amount of heat held in the solubilization tank that is taken out to the atmosphere together with the exhaust gas.
【００１０】[0010]
【実施例】以下に本発明の実施例を説明する。平面構成
は図４に示す処理装置と同じであり、本発明において
は、図１に示すように、可溶化槽６は密閉状態にあり、
可溶化槽６の近傍にはコンプレッサー８が１台設置され
ている。このコンプレッサー８から可溶化槽６に通入さ
れた高圧空気により、可溶化処理後の処理液は管路９を
経て高圧空気とともに曝気槽２に導入される。これに対
して、図３に示す従来の処理装置のものは、可溶化槽６
の上部は開放されており、また、可溶化槽と曝気槽に
は、それぞれ個別のコンプレッサー１０、１１から高圧
空気が通入されている。次に、可溶化槽と曝気槽が図１
に示す構成の本発明の有機性廃液の処理装置と、可溶化
槽と曝気槽が図３に示す構成の従来の有機性廃液の処理
装置を用いて、実際に有機性廃液を処理したので、その
結果について説明する。Embodiments of the present invention will be described below. The planar configuration is the same as that of the processing apparatus shown in FIG. 4, and in the present invention, as shown in FIG. 1, the solubilization tank 6 is in a closed state,
One compressor 8 is installed near the solubilization tank 6. With the high-pressure air passed from the compressor 8 to the solubilization tank 6, the treatment liquid after the solubilization treatment is introduced into the aeration tank 2 together with the high-pressure air via the pipe 9. On the other hand, the conventional processing apparatus shown in FIG.
Is open, and high-pressure air is passed into the solubilizing tank and the aeration tank from separate compressors 10 and 11, respectively. Next, the solubilization tank and aeration tank are
Since the organic waste liquid treatment apparatus of the present invention having the structure shown in FIG. 3 and the solubilization tank and the aeration tank actually treated the organic waste liquid using the conventional organic waste liquid treatment apparatus having the structure shown in FIG. The result will be described.
【００１１】可溶化槽６の形状は、直径０．１５ｍ、高
さ０．８ｍ、有効容積１０リットルのステンレス製円筒
型槽であり、曝気槽２の形状は、直径０．４ｍ、高さ５
ｍ、水深４ｍ、有効容積５００リットルの透明塩化ビニ
ル樹脂製円筒型槽である。そして、汚泥の可溶化槽６内
の滞留時間は２日とし、通気量を１ノルマルリットル／
分、３ノルマルリットル／分、５ノルマルリットル／分
の３水準として、２％余剰汚泥を好熱性微生物により連
続的に処理した。図１において、可溶化槽６に通入する
空気圧は１ｋｇ／ｃｍ2 （ゲージ圧）であり、図３にお
いて、可溶化槽６に通入する空気圧は０．１ｋｇ／ｃｍ
2 （ゲージ圧）、曝気槽２に通入する空気圧は０．７ｋ
ｇ／ｃｍ2 （ゲージ圧）である。なお、可溶化槽６の温
度は、ヒーター（図示せず）により約６５℃に保持し
た。その結果、次の表１に示すような汚泥の可溶化率を
得た。The shape of the solubilizing tank 6 is a stainless steel cylindrical tank having a diameter of 0.15 m, a height of 0.8 m and an effective volume of 10 liters. The shape of the aeration tank 2 is a diameter of 0.4 m and a height of 5 m.
It is a cylindrical tank made of transparent vinyl chloride resin having a depth of 4 m and an effective volume of 500 liters. And the residence time of the sludge in the solubilization tank 6 is set to 2 days, and the aeration amount is 1 normal liter /
2% excess sludge was continuously treated with thermophilic microorganisms at three levels of 3 normal liters / minute and 5 normal liters / minute. In FIG. 1, the air pressure flowing into the solubilizing tank 6 is 1 kg / cm 2 (gauge pressure), and in FIG. 3, the air pressure flowing into the solubilizing tank 6 is 0.1 kg / cm.
2 (gauge pressure), the air pressure flowing into the aeration tank 2 is 0.7k
g / cm 2 (gauge pressure). In addition, the temperature of the solubilization tank 6 was maintained at about 65 ° C. by a heater (not shown). As a result, the solubilization ratio of sludge as shown in the following Table 1 was obtained.
【００１２】[0012]
【表１】 [Table 1]
【００１３】表１に明らかなように、従来の処理装置に
よるものでは、汚泥可溶化率４０％以上を得るには、３
ノルマルリットル／分の通気量では不十分であり、５ノ
ルマルリットル／分の通気量が必要である。しかし、本
発明の処理装置では、１ノルマルリットル／分の通気量
で５０％近い可溶化率を得ることができる。また、従来
の処理装置では、可溶化槽６の上部は開放されているた
め、排ガスによる強い刺激臭があったが、本明の処理装
置では可溶化槽６の上部は密閉されており、可溶化槽６
から曝気槽２を経て大気中に放散される排ガスの臭いは
強くなかった。図１に示す実施例では、可溶化槽６から
の処理液は高圧空気とともに管路９を経て曝気槽２に導
入されているが、図２に示すように別の管路１２を設け
ることにより、高圧空気とは別に曝気槽に導入すること
も可能である。また、固液分離は固液分離装置を用いて
重力沈降により行ったが、これに限定されるものでな
く、遠心分離、膜分離等により固液分離してもよい。As is clear from Table 1, in the case of using the conventional treatment apparatus, it is necessary to obtain 3% or more of the sludge solubilization rate by 3%.
A normal liter / minute ventilation rate is not sufficient, and a 5 normal liter / minute ventilation rate is required. However, in the processing apparatus of the present invention, a solubilization rate of nearly 50% can be obtained with a ventilation rate of 1 normal liter / minute. Further, in the conventional processing apparatus, since the upper part of the solubilization tank 6 was open, there was a strong irritating odor due to the exhaust gas. However, in the processing apparatus of the present invention, the upper part of the solubilization tank 6 is sealed, Melting tank 6
The odor of the exhaust gas released into the atmosphere through the aeration tank 2 from the air was not strong. In the embodiment shown in FIG. 1, the processing liquid from the solubilization tank 6 is introduced into the aeration tank 2 through the pipe 9 together with the high-pressure air. However, by providing another pipe 12 as shown in FIG. Alternatively, it is also possible to introduce the air into the aeration tank separately from the high-pressure air. The solid-liquid separation was performed by gravity sedimentation using a solid-liquid separator, but the present invention is not limited to this, and solid-liquid separation may be performed by centrifugation, membrane separation, or the like.
【００１４】[0014]
【発明の効果】本発明は上記のとおり構成されているの
で、有機性汚泥を含む廃液を生物学的に処理するに際し
て、供給空気量を低減することができる。その結果、排
ガスとともに大気中に持ち出される可溶化槽の保有熱量
を削減することができる。さらに、可溶化槽から排出さ
れるガスは曝気槽を経て大気中に放散されるため、排ガ
ス臭は著しく弱くなる。The present invention is configured as described above, so that the amount of air supplied can be reduced when biologically treating a waste liquid containing organic sludge. As a result, it is possible to reduce the amount of heat held in the solubilization tank taken out into the atmosphere together with the exhaust gas. Further, since the gas discharged from the solubilization tank is released into the atmosphere via the aeration tank, the odor of the exhaust gas is significantly reduced.
【図１】本発明の処理装置において、可溶化槽から曝気
槽に至る経路を示す一実施例の断面図である。FIG. 1 is a cross-sectional view of one embodiment showing a path from a solubilization tank to an aeration tank in the processing apparatus of the present invention.
【図２】本発明の処理装置において、可溶化槽から曝気
槽に至る経路を示す別の実施例の断面図である。FIG. 2 is a cross-sectional view of another embodiment showing a path from a solubilization tank to an aeration tank in the processing apparatus of the present invention.
【図３】従来の処理装置において、可溶化槽から曝気槽
に至る経路を示す断面図である。FIG. 3 is a cross-sectional view showing a path from a solubilization tank to an aeration tank in a conventional processing apparatus.
【図４】有機性廃液の処理装置の概略構成を示す平面図
である。FIG. 4 is a plan view showing a schematic configuration of an organic waste liquid treatment apparatus.
１…有機性廃液貯留槽 ２…曝気槽 ３…固液分離装置 ４…環流経路 ６…可溶化槽 ７…返送経路 ９、１２…管路 DESCRIPTION OF SYMBOLS 1 ... Organic waste liquid storage tank 2 ... Aeration tank 3 ... Solid-liquid separation apparatus 4 ... Recirculation path 6 ... Solubilization tank 7 ... Return path 9, 12 ... Pipe line
Claims (2)
をした後、この処理液を固液分離装置にて処理水と汚泥
に固液分離し、上記固液分離装置で分離された汚泥の一
部を環流経路を経て曝気槽に返送し、上記固液分離装置
で分離された汚泥のうち余剰汚泥を可溶化槽にて高温で
可溶化し、可溶化された処理液を返送経路を経て曝気槽
に返送する有機性廃液の処理方法において、可溶化槽を
密閉状態とし、可溶化槽に通入した高圧空気を曝気槽に
通入することを特徴とする有機性廃液の処理方法。1. An aerobic biological treatment of an organic waste liquid in an aeration tank, and the treatment liquid is solid-liquid separated into treated water and sludge by a solid-liquid separator, and separated by the solid-liquid separator. A part of the sludge is returned to the aeration tank via the circulation path, and the excess sludge of the sludge separated by the solid-liquid separation device is solubilized at a high temperature in the solubilization tank, and the solubilized processing liquid is returned to the return path. A method for treating an organic waste liquid which is returned to an aeration tank via a method, wherein the solubilization tank is sealed, and high-pressure air passed through the solubilization tank is passed through the aeration tank. .
この順で配して相互に接続し、上記固液分離装置で分離
された汚泥の一部を曝気槽に返送するための環流経路
と、上記可溶化槽で可溶化された処理液を曝気槽に返送
するための返送経路とを設けた有機性廃液の処理装置に
おいて、可溶化槽を密閉状態とし、可溶化槽に通入する
高圧空気を、可溶化槽と曝気槽を接続する管路を経て曝
気槽に通入可能としたことを特徴とする有機性廃液の処
理装置。2. An aeration tank, a solid-liquid separation device and a solubilization tank arranged in this order and connected to each other, and a reflux for returning a part of the sludge separated by the solid-liquid separation device to the aeration tank. In the organic waste liquid treatment apparatus provided with a path and a return path for returning the treatment liquid solubilized in the solubilization tank to the aeration tank, the solubilization tank is closed, and the solute is passed into the solubilization tank. An apparatus for treating an organic waste liquid, characterized in that high-pressure air to be discharged can be passed into an aeration tank through a pipe connecting the solubilization tank and the aeration tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15663797A JP3394157B2 (en) | 1997-06-13 | 1997-06-13 | Method and apparatus for treating organic waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15663797A JP3394157B2 (en) | 1997-06-13 | 1997-06-13 | Method and apparatus for treating organic waste liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11686A true JPH11686A (en) | 1999-01-06 |
| JP3394157B2 JP3394157B2 (en) | 2003-04-07 |
Family
ID=15632031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15663797A Expired - Lifetime JP3394157B2 (en) | 1997-06-13 | 1997-06-13 | Method and apparatus for treating organic waste liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3394157B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4897399A (en) * | 1988-04-20 | 1990-01-30 | Ciba-Geigy Corp. | Heterotertracyclic lactam derivatives, pharmaceutical compositions, and method of treating impaired memory and learning |
| JP2003326299A (en) * | 2002-05-09 | 2003-11-18 | Mitsubishi Kakoki Kaisha Ltd | Sludge treatment apparatus and sludge treatment method |
| CN103203350A (en) * | 2013-03-26 | 2013-07-17 | 蚌埠市佳力化工有限责任公司 | Waste treating pond |
-
1997
- 1997-06-13 JP JP15663797A patent/JP3394157B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4897399A (en) * | 1988-04-20 | 1990-01-30 | Ciba-Geigy Corp. | Heterotertracyclic lactam derivatives, pharmaceutical compositions, and method of treating impaired memory and learning |
| JP2003326299A (en) * | 2002-05-09 | 2003-11-18 | Mitsubishi Kakoki Kaisha Ltd | Sludge treatment apparatus and sludge treatment method |
| CN103203350A (en) * | 2013-03-26 | 2013-07-17 | 蚌埠市佳力化工有限责任公司 | Waste treating pond |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3394157B2 (en) | 2003-04-07 |
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