JPH0463198A - Activated sludge treating equipment - Google Patents
Activated sludge treating equipmentInfo
- Publication number
- JPH0463198A JPH0463198A JP2170760A JP17076090A JPH0463198A JP H0463198 A JPH0463198 A JP H0463198A JP 2170760 A JP2170760 A JP 2170760A JP 17076090 A JP17076090 A JP 17076090A JP H0463198 A JPH0463198 A JP H0463198A
- Authority
- JP
- Japan
- Prior art keywords
- activated sludge
- filter media
- tank
- filamentous fungi
- string
- 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 39
- 238000005273 aeration Methods 0.000 claims abstract description 35
- 239000002351 wastewater Substances 0.000 claims abstract description 16
- 239000002657 fibrous material Substances 0.000 claims abstract description 15
- 241000894006 Bacteria Species 0.000 claims description 13
- 244000005700 microbiome Species 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 150000001720 carbohydrates Chemical class 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 4
- 239000006228 supernatant Substances 0.000 abstract description 4
- 229920001328 Polyvinylidene chloride Polymers 0.000 abstract description 3
- 229920001778 nylon Polymers 0.000 abstract description 3
- 239000005033 polyvinylidene chloride Substances 0.000 abstract description 3
- 238000004062 sedimentation Methods 0.000 abstract description 3
- 239000004677 Nylon Substances 0.000 abstract description 2
- 241000233866 Fungi Species 0.000 abstract 5
- 238000010586 diagram Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000013019 agitation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 241001478894 Sphaerotilus Species 0.000 description 1
- -1 and at the same time Substances 0.000 description 1
- 239000004067 bulking agent Substances 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 239000002035 hexane extract Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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
Landscapes
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は糸状性細菌が発生しやすい食品廃水等の廃水を
生物処理によって好適に処理し得る活性汚泥処理装置の
改良に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an improvement in an activated sludge treatment apparatus that can suitably treat wastewater such as food wastewater in which filamentous bacteria are likely to be generated by biological treatment.
（従来の技術）
従来、活性汚泥処理装置として第３図に示すものが知ら
れている。この種の装置は廃水を１次的に受は入れて流
量調整を行なう槽（１）と、曝気槽（２）および沈澱槽
（３）からなり、廃水は流量調整槽（１）に−時的に貯
留し、腐敗しないように前曝気用のブロワ（４）により
槽（１）内の散気袋Ｍ（５）を介し曝気攪拌が行なわれ
る。流量調整槽（１）内の廃水は導入ポンプ（６）によ
り計量器（７ａ）を介して曝気槽（２）に送られ、ここ
でブロワ（８）により散気袋Ｗ（９）を介して空気が供
給され、微生物によって生物処理が行なわれる。曝気槽
（２）内で生物処理された処理水と活性汚泥は共に沈澱
槽（３）に導入され、そこで固体と液体の分離が行なわ
れる。沈澱槽（３）内の上澄水は処理水として放流され
、沈降した汚泥は槽内の下部から汚泥計量器（７ｂ）を
通って再び曝気槽（２）に送られる。なお、曝気槽（２
）内には場合により濾材が設置される。(Prior Art) Conventionally, the activated sludge treatment apparatus shown in FIG. 3 is known. This type of equipment consists of a tank (1) that primarily receives wastewater and adjusts the flow rate, an aeration tank (2), and a sedimentation tank (3). Aeration and agitation are performed by a pre-aeration blower (4) through an aeration bag M (5) in the tank (1) to prevent the mixture from accumulating and spoiling. The wastewater in the flow rate adjustment tank (1) is sent to the aeration tank (2) by the introduction pump (6) via the meter (7a), and here it is sent to the aeration tank (2) by the blower (8) via the aeration bag W (9). Air is supplied and biological treatment is performed by microorganisms. The treated water and activated sludge that have been subjected to biological treatment in the aeration tank (2) are both introduced into a settling tank (3), where solids and liquids are separated. The supernatant water in the settling tank (3) is discharged as treated water, and the settled sludge is sent from the lower part of the tank through the sludge meter (7b) to the aeration tank (2) again. In addition, the aeration tank (2
) may be equipped with a filter medium.
従来の装置では廃水量の変動またはＢＯＤ負荷が高い場
合（ＢＯＤ負荷０．５）ｃｇ／ ｒｎ’ ・０以上）。With conventional equipment, when the amount of wastewater fluctuates or the BOD load is high (BOD load 0.5) cg/rn' ・0 or more).
とくに食品廃水のように炭水化物系ＢＯＤ成分の多い廃
水を処理する場合には活性汚泥の主流を占めるズーグレ
ア（ｚｏｏｇｌｅａ）菌の中にスフェロティルス（ｓｐ
ｈａｅｒｏｔｉｌｕｓ）などの糸状性細菌が増殖し、汚
泥全体が真綿状に膨化（バルキング）シ、従って沈降分
離しなくなる。そのため沈澱槽（３）内において汚泥と
上澄水の分離、即ち固液分離が不可能になり、処理水と
共に汚泥が放流され、生物処理不能の状態になるという
問題点があった。In particular, when treating wastewater containing a large amount of carbohydrate-based BOD components such as food wastewater, Sphaerotilus (spherotilus
Filamentous bacteria such as S. haerotilus proliferate, causing the entire sludge to swell into a cotton-like appearance (bulking), making it impossible to settle and separate. Therefore, separation of sludge and supernatant water, that is, solid-liquid separation, is impossible in the sedimentation tank (3), and the sludge is discharged together with the treated water, resulting in a problem that biological treatment is impossible.
その対策として汚泥自体のフロックを大きくしたり、フ
ロックに重さを与えるため塩化第２鉄や高分子凝集剤等
を注入したり、または市販のバルキング防止剤等を投入
することが行なわれたが、ランニングコストが高く、且
つまた汚泥自体の活性を弱める等の欠点があった。As a countermeasure, measures have been taken to increase the size of the flocs of the sludge itself, to add weight to the flocs by injecting ferric chloride or polymer flocculants, or to add commercially available anti-bulking agents. However, there were drawbacks such as high running costs and weakening of the activity of the sludge itself.
本発明の目的は上記従来技術の問題点を解消することで
あって、それ故１食品廃水などのように炭水化物系ＢＯ
Ｄ成分の多い廃水であってもバルキングを生じることな
く効率よく生物処理を行ない得る活性汚泥処理装置を提
供することである。The purpose of the present invention is to solve the above-mentioned problems of the prior art.
To provide an activated sludge treatment device capable of efficiently biologically treating wastewater containing a large amount of D component without causing bulking.
（課題を解決するための手段）
本発明による活性汚泥処理装置の特徴は曝気槽（１０）
内に設置される接触濾材として、ひも状に形成された繊
維材（１４）、とくに好ましくはポリ塩化ビニリデンま
たはナイロン等の繊維材を撚り線の形にしたものを用い
、該接触濾材に糸状性細菌を付着させるようにしたこと
である。(Means for Solving the Problems) The activated sludge treatment apparatus according to the present invention is characterized by an aeration tank (10)
A fibrous material (14) formed in the form of a string, particularly preferably a stranded fibrous material such as polyvinylidene chloride or nylon, is used as the contact filter medium installed in the contact filter medium. This is to allow bacteria to adhere to it.
（作用）
曝気槽内における生物処理により糸状性細菌が発生する
が、それらは接触濾材（１４）に付着し且つ主としてズ
ーグリア菌からなる活性汚泥と共存し処理性能を高める
。生物処理された処理水と活性汚泥は沈澱槽（３）に導
入されるが、その活性汚泥中には糸状性細菌は殆んど含
まれていないのでバルキングすることはなく、従って固
液の分離が適切に行なわれ、上澄水は放流され、沈降し
た汚泥は再び曝気槽内に送られる。(Function) Filamentous bacteria are generated by the biological treatment in the aeration tank, but they adhere to the contact filter medium (14) and coexist with the activated sludge mainly consisting of Zooglia bacteria, improving treatment performance. The biologically treated treated water and activated sludge are introduced into the settling tank (3), but since the activated sludge contains almost no filamentous bacteria, bulking does not occur, and therefore solid-liquid separation is not possible. is carried out properly, the supernatant water is discharged, and the settled sludge is sent back into the aeration tank.
（実施例）
第１図は本発明による活性汚泥処理装置の一実施例を示
すものであって、図示のように、この装置も廃水を受は
入れる流量調整槽（１）、曝気槽（１０）および沈澱槽
（３）を含み、それらの槽に関連してブロワ（４）、散
気装置（５）、ポンプ（６）、計量器（７ａ）、（７ｂ
）および曝気槽（１０）内に空気を送るブロワ（８）お
よび散気装置Ｆ（１１）、（１２）、（１３）が設置さ
れる。(Example) Fig. 1 shows an embodiment of an activated sludge treatment apparatus according to the present invention. ) and a settling tank (3), and associated with these tanks are a blower (4), an aeration device (5), a pump (6), a meter (7a), and a settling tank (7b).
) and a blower (8) that sends air into the aeration tank (10), and air diffusers F (11), (12), and (13) are installed.
この活性汚泥処理装置の特徴は曝気槽（１０）内に設置
される接触濾材としてひも状に形成された繊維材（１４
）からなる濾材を用いたことであり、このことはスフェ
ロテイルス菌などの糸状性細菌は従来用いられてきたハ
ニカム状の濾材またはプラスチック板製の濾材、もしく
はプラスチック製の網からなる濾材等よりも、ひも状に
形成された繊維材に対しはるかに付着しやすいことの発
見に基づくものである。繊維材としてはポリ塩化ビニリ
デンまたはナイロン等の繊維であるのが好ましく。The feature of this activated sludge treatment equipment is that a fiber material (14) formed in a string shape is used as a contact filter medium installed in the aeration tank (10).
), which means that filamentous bacteria such as Sphaerotails are more easily filtered than conventionally used honeycomb-shaped filter media, plastic plate filter media, or plastic mesh filter media. This is based on the discovery that fibrous materials adhere much more easily to fibrous materials formed into strings. The fiber material is preferably polyvinylidene chloride or nylon fiber.
またひもの形態としては単繊維より数本を合せた撚り線
であるのが好ましく、さらに１０〜１５μの直径のもの
を数十本撚ったものであるのが好ましい。このような撚
り線であれば糸状性細菌の付着性は一層高まる。As for the form of the string, it is preferable to use a stranded wire consisting of several fibers together rather than a single fiber, and more preferably a twisted wire consisting of several tens of fibers with a diameter of 10 to 15 μm. Such twisted wires will further increase the adhesion of filamentous bacteria.
また接触濾材としてひも状に形成された繊維材を用いる
場合、第１図に示すように曝気槽（１０）内に仕切壁（
１５）を設けて該内部を数段に区切るのが好ましく、そ
の場合各区域内にひも状の繊維材（１４）からなる接触
濾材および散気装置が設置される。In addition, when using a string-shaped fibrous material as a contact filter medium, a partition wall (
15) to divide the interior into several stages, in which case a contact filter medium made of string-like fibrous material (14) and an air diffuser are installed in each zone.
好ましくは曝気槽内は４区域またはそれ以上に区分され
、その中で処理される廃水は順次オーバーフローして隣
接の区域に導入され、最終段で沈澱槽（３）に送入され
るようになっている。なお、ひも状の繊維材（１４）は
例えばループ状にして曝気槽（１０）内に設置される。Preferably, the inside of the aeration tank is divided into four or more zones, and the wastewater treated therein sequentially overflows and is introduced into the adjacent zone, and is finally sent to the settling tank (3). ing. Note that the string-like fibrous material (14) is placed in the aeration tank (10) in the form of a loop, for example.
上記の実施例では沈澱槽（３）において下降した汚泥を
そのまま曝気槽（１０）に戻すようになっているが、所
望により第２図に示すように、曝気槽（１０）の近くに
汚泥再曝気槽（１６）を設けてもよく、この場合、沈澱
槽（３）の汚泥は再曝気槽（１６）に導入され、ブロワ
（８）に連通ずる空気管（１７）により曝気し、汚泥を
安定させた後に、曝気槽（１０）に導入される。このよ
うに汚泥を安定させることによってＢＯＤ負荷を一層高
めることができる。In the above embodiment, the sludge that has descended in the settling tank (3) is directly returned to the aeration tank (10), but if desired, as shown in Figure 2, the sludge can be recycled near the aeration tank (10). An aeration tank (16) may be provided, in which case the sludge in the settling tank (3) is introduced into the re-aeration tank (16), where it is aerated by an air pipe (17) communicating with the blower (8) and the sludge is After stabilization, it is introduced into the aeration tank (10). By stabilizing the sludge in this way, the BOD load can be further increased.
この生物処理装置は炭水化物系ＢＯＤ成分の多い廃水の
処理に好適に用いられるものであって、そのような廃水
は先ず流量調整槽（１）内に貯留され、ブロワ（４）お
よび散気袋Ｍ（５）により曝気攪拌を行った上、ポンプ
（６）により計量器（７ａ）を介して曝気槽（１０）に
導入される。曝気槽（１０）内ではブロワ（８）により
各散気装置（１１）、（１２）、（Ｉ３）を介して空気
を送り生物処理が行なわれる。This biological treatment device is suitably used to treat wastewater containing a large amount of carbohydrate-based BOD components, and such wastewater is first stored in a flow rate adjustment tank (1), and is then transferred to a blower (4) and an aeration bag M. After aeration and agitation are performed by (5), the mixture is introduced into the aeration tank (10) by a pump (6) via a meter (7a). In the aeration tank (10), a blower (8) sends air through each of the aeration devices (11), (12), and (I3) to perform biological treatment.
その際、増殖する糸状性細菌はひも状の繊維材からなる
接触濾材（１４）に付着し同時に該濾材にはズーグレア
菌を主とする汚泥も付着する。さらに曝気槽（１０）内
には沈澱槽（３）の下部から計量器（７ｂ）を介し返送
された汚泥が浮遊しており、従って接触濾材（１４）に
付着する糸状性細菌と汚泥、および浮遊する汚泥の３種
の汚泥微生物によって生物処理が行なわれるので、高い
処理能力を有し、高ＢＯＤ負荷であってもそれに対応す
ることができる。At this time, the growing filamentous bacteria adhere to the contact filter medium (14) made of string-like fiber material, and at the same time, sludge mainly containing Zooglaia bacteria also adheres to the filter medium. Furthermore, sludge returned from the lower part of the settling tank (3) via the meter (7b) is suspended in the aeration tank (10), and therefore filamentous bacteria and sludge that adhere to the contact filter medium (14) and Since biological treatment is performed by three types of sludge microorganisms in the floating sludge, it has a high treatment capacity and can handle even high BOD loads.
例えば、冬期に水温５℃以下で原水Ｂ ＯＤ １０００
ｗ、ＩＱで、ＢＯＤ負荷１．５ｋｇ／ｒｒ１′・日で処
理してもＢＯＤ除去率は９９％となり良好な結果が得ら
れた。さらに、従来の活性汚泥装置では脱窒は殆んど不
可能であったが、この装置で原水Ｔ−Ｎ７５０■／Ｑを
生物処理して得られた処理水は約５■／Ｑとなり、９９
％以上の脱窒が可能であり、またｎ−ヘキサン抽出物の
除去率も高い値を示した。For example, in winter when the water temperature is below 5℃, raw water BOD 1000
Even when treated with a BOD load of 1.5 kg/rr1'·day, the BOD removal rate was 99%, which was a good result. Furthermore, although denitrification was almost impossible with conventional activated sludge equipment, the treated water obtained by biologically treating raw water T-N750/Q with this equipment was approximately 5/Q, which was 99%
% or more was possible, and the removal rate of n-hexane extract also showed a high value.
（発明の効果）
上記のように本発明によれば、糸状性細菌を接触濾材に
付着させることができるので１食品廃水などのように炭
水化物系ＢＯＤ成分の多い廃水であってもバルキングを
生じることなく、適切に処理することができる。さらに
処理性能を高めることができるので、ＢＯＤ負荷を高く
とることができ、且つまた処理性能が安定し、設置スペ
ースを小さくでき、コストの節減に寄与する。また脱窒
も可能である。(Effects of the Invention) As described above, according to the present invention, since filamentous bacteria can be attached to the contact filter medium, bulking does not occur even in wastewater containing a large amount of carbohydrate-based BOD components such as food wastewater. It can be handled properly without any problems. Furthermore, since the processing performance can be improved, the BOD load can be increased, the processing performance is stable, and the installation space can be reduced, contributing to cost reduction. Denitrification is also possible.
第１図は本発明の一例による活性汚泥処理装置を示す概
略図、第２図は本発明の他の実施例を示す概略図、そし
て第３図は従来の活性汚泥処理装置を示す図である。
図中、１０：曝気槽、１１，１２．１３：散気装置、１
４：ひも状の繊維材FIG. 1 is a schematic diagram showing an activated sludge treatment device according to an example of the present invention, FIG. 2 is a schematic diagram showing another embodiment of the present invention, and FIG. 3 is a diagram showing a conventional activated sludge treatment device. . In the figure, 10: aeration tank, 11, 12.13: aeration device, 1
4: String-like fiber material
Claims (1)
を含み、該曝気槽内には微生物を付着させる接触濾材と
該濾材の下方より空気を供給する散気装置が備えられて
いる活性汚泥処理装置において、前記接触濾材はとくに
糸状性細菌を付着させるためひも状に形成された繊維材
によって構成されていることを特徴とする活性汚泥処理
装置。Activated sludge treatment equipment that includes an aeration tank that purifies wastewater such as food wastewater through biological treatment, and the aeration tank is equipped with a contact filter medium that attaches microorganisms and an aeration device that supplies air from below the filter medium. An activated sludge treatment apparatus, characterized in that the contact filter medium is constituted by a fibrous material formed in a string shape in order to specifically attach filamentous bacteria.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2170760A JPH0463198A (en) | 1990-06-28 | 1990-06-28 | Activated sludge treating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2170760A JPH0463198A (en) | 1990-06-28 | 1990-06-28 | Activated sludge treating equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0463198A true JPH0463198A (en) | 1992-02-28 |
Family
ID=15910875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2170760A Pending JPH0463198A (en) | 1990-06-28 | 1990-06-28 | Activated sludge treating equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0463198A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007229599A (en) * | 2006-02-28 | 2007-09-13 | Kansai Pgs Kk | Sewage treating apparatus |
| JP2007319819A (en) * | 2006-06-02 | 2007-12-13 | Kansai Pgs Kk | Phosphorus recovery method |
| JP2008183519A (en) * | 2007-01-30 | 2008-08-14 | Kansai Pgs Kk | Sewage treatment apparatus and phosphorus recovering method |
| JP2009039709A (en) * | 2007-07-17 | 2009-02-26 | Asahi Kasei Chemicals Corp | Treating apparatus and treating method for oil and fat-containing wastewater |
| JP2009072767A (en) * | 2007-08-30 | 2009-04-09 | Asahi Kasei Chemicals Corp | Activated sludge apparatus and treatment method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51127572A (en) * | 1975-04-25 | 1976-11-06 | Aisin Seiki Co Ltd | Apparatus for biological oxidation of waste water |
| JPS55114393A (en) * | 1979-02-26 | 1980-09-03 | Showa Denko Kk | Improvement in activated sludge method |
| JPS5633677U (en) * | 1979-08-20 | 1981-04-02 | ||
| JPS5976595A (en) * | 1982-10-25 | 1984-05-01 | Takenaka Komuten Co Ltd | Treating apparatus by activated sludge |
| JPS6435280A (en) * | 1987-07-30 | 1989-02-06 | Furukawa Electric Co Ltd | Method for monitoring transmission line |
| JPS6438556A (en) * | 1987-08-04 | 1989-02-08 | Takashi Takahashi | Flowing-down type solar heat collector |
| JPS6443395A (en) * | 1987-08-10 | 1989-02-15 | Keisuke Kumazawa | Method for purifying living waste water |
| JPS6435280U (en) * | 1987-08-26 | 1989-03-03 |
-
1990
- 1990-06-28 JP JP2170760A patent/JPH0463198A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51127572A (en) * | 1975-04-25 | 1976-11-06 | Aisin Seiki Co Ltd | Apparatus for biological oxidation of waste water |
| JPS55114393A (en) * | 1979-02-26 | 1980-09-03 | Showa Denko Kk | Improvement in activated sludge method |
| JPS5633677U (en) * | 1979-08-20 | 1981-04-02 | ||
| JPS5976595A (en) * | 1982-10-25 | 1984-05-01 | Takenaka Komuten Co Ltd | Treating apparatus by activated sludge |
| JPS6435280A (en) * | 1987-07-30 | 1989-02-06 | Furukawa Electric Co Ltd | Method for monitoring transmission line |
| JPS6438556A (en) * | 1987-08-04 | 1989-02-08 | Takashi Takahashi | Flowing-down type solar heat collector |
| JPS6443395A (en) * | 1987-08-10 | 1989-02-15 | Keisuke Kumazawa | Method for purifying living waste water |
| JPS6435280U (en) * | 1987-08-26 | 1989-03-03 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007229599A (en) * | 2006-02-28 | 2007-09-13 | Kansai Pgs Kk | Sewage treating apparatus |
| JP4671888B2 (en) * | 2006-02-28 | 2011-04-20 | 関西ピー・ジー・エス株式会社 | Sewage treatment equipment |
| JP2007319819A (en) * | 2006-06-02 | 2007-12-13 | Kansai Pgs Kk | Phosphorus recovery method |
| JP2008183519A (en) * | 2007-01-30 | 2008-08-14 | Kansai Pgs Kk | Sewage treatment apparatus and phosphorus recovering method |
| JP2009039709A (en) * | 2007-07-17 | 2009-02-26 | Asahi Kasei Chemicals Corp | Treating apparatus and treating method for oil and fat-containing wastewater |
| JP2009072767A (en) * | 2007-08-30 | 2009-04-09 | Asahi Kasei Chemicals Corp | Activated sludge apparatus and treatment method |
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