JPH04200697A - Organic wastewater treatment equipment - Google Patents
Organic wastewater treatment equipmentInfo
- Publication number
- JPH04200697A JPH04200697A JP2329789A JP32978990A JPH04200697A JP H04200697 A JPH04200697 A JP H04200697A JP 2329789 A JP2329789 A JP 2329789A JP 32978990 A JP32978990 A JP 32978990A JP H04200697 A JPH04200697 A JP H04200697A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- fluidized
- organic wastewater
- ultrafiltration membrane
- wastewater treatment
- 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
- 238000004065 wastewater treatment Methods 0.000 title claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 239000012528 membrane Substances 0.000 claims description 19
- 238000000108 ultra-filtration Methods 0.000 claims description 19
- 238000005243 fluidization Methods 0.000 claims description 12
- 239000000969 carrier Substances 0.000 claims description 9
- 230000000813 microbial effect Effects 0.000 claims description 7
- 239000002351 wastewater Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000012535 impurity Substances 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000002699 waste material Substances 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)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、流動床式生物処理装置と限外濾過膜装置とを
組み合わせた有機性廃水の処理装置に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an organic wastewater treatment device that combines a fluidized bed type biological treatment device and an ultrafiltration membrane device.
〈従来の技術〉
有機性廃水の処理装置の一例として、流動床式生物処理
装置と限外濾過膜装置とを組み合わせたものがある。<Prior Art> An example of an organic wastewater treatment device is one that combines a fluidized bed biological treatment device and an ultrafiltration membrane device.
第２図に基づいてその構成を説明すると、まず、有機性
廃水はスクリーン１て粗雑物が除去され、流９凋整槽２
内へ流入される。そして、この流Ｑ調整槽２に貯留され
た廃水は、流是調整ポンプ３により、計＠１曹４を介し
て膨張式流動槽５内に流入される。To explain the structure based on Fig. 2, first, organic wastewater is passed through a screen 1 to remove impurities, and then passed through a stream of 9 filtration tanks 2.
It flows inward. Then, the wastewater stored in the flow Q adjustment tank 2 is caused to flow into the expansion type fluidization tank 5 via the total flow rate 4 by the flow adjustment pump 3.
」二記膨脹式流動槽５内には、比重的２、ｉ−７，径約
ＩＩｌ！ｍφの粒状担体６か投入されており、循環ポン
プ゛７を動力源とした上向流により粒状担体６を膨潤さ
せる。”2 The inside of the expansion type fluidized tank 5 has a specific gravity of 2, i-7, and a diameter of about IIl! A granular carrier 6 having a diameter of mφ is charged, and the granular carrier 6 is swollen by an upward flow using a circulation pump 7 as a power source.
そして、膨脹式流動槽５の溢流水は、次にエアリフト式
流動槽８内に流入する。このエアリフト式流動槽８内に
は、膨張式流動槽５内で使用した担体と同等もしくはそ
れより若干粒子径の小さい０．３〜Ｑ、 ５ｍｍφ程
度の担体９を投入し、ブロア１０によるエアリフト効果
で、担体９をエアリフト式流動槽８内で循環させる。The overflow water from the expansion type fluidized tank 5 then flows into the air lift type fluidized tank 8. Into this air-lift type fluidized tank 8, a carrier 9 with a particle diameter of about 0.3 to Q, 5 mmφ, which is equivalent to or slightly smaller than the carrier used in the expansion-type fluidized tank 5, is put, and the air lift effect by the blower 10 is applied. Then, the carrier 9 is circulated within the air-lift fluidized tank 8.
その後、エアリフト式流動槽８の上澄水は、マイクロス
クリーン１１により担体および狭雑物を分離回収した後
、流動処理水槽１２内に流入される。この流動処理水槽
１２内に貯留された生物処理水は、循環ポンプ１３によ
り限外濾過膜モジュール１４に供給され、ここで透過水
と濃縮水とに分離され、濃縮水は流動処理水槽１２内に
返還され、かつ透過水は処理水として殺菌後放流あるい
は再利用される。Thereafter, the supernatant water of the air lift type fluidized tank 8 is flowed into the fluidized treatment water tank 12 after the carriers and impurities are separated and recovered by the micro screen 11 . The biologically treated water stored in the fluidized water treatment tank 12 is supplied to the ultrafiltration membrane module 14 by the circulation pump 13, where it is separated into permeated water and concentrated water. The permeated water is sterilized and then discharged or reused as treated water.
〈発明が解決しようとする課題〉
このように、従来の流動床式生物処理装置と限外濾過膜
装置とを組み合わせた有機性廃水の処理装置においては
、膨張式流動槽５内の微生物（■体６を」―向流で膨潤
させるための循環ポンプ７と、流動処理水槽１２から限
外濾過膜モジュール１４に生物処理水をｆＪ（給する循
環ポンプ１３との２台の循環ポンプ７．１３が必要であ
り、それぞれ独自に稼働している。したがって、装置の
イニシャルコスト、ランニングコストが高くなるという
欠点が指摘されている。<Problems to be Solved by the Invention> As described above, in an organic wastewater treatment device that combines a conventional fluidized bed biological treatment device and an ultrafiltration membrane device, microorganisms ( Two circulation pumps 7.13: a circulation pump 7 for swelling the body 6 in a countercurrent flow, and a circulation pump 13 for supplying biologically treated water fJ (fJ) from the fluid treatment water tank 12 to the ultrafiltration membrane module 14. are required, and each operates independently.Therefore, it has been pointed out that the initial cost and running cost of the device are high.
さらに、膨張式流動槽５内の微生物担体６の液中界面は
、現場の管理者が目視等で判断し、担体６の溢流が起こ
る前に余分な汚泥を剥離させる操作を行ない、微生物担
体６の界面を低下させているのが実情であり、そのため
、非常に面倒な作業を頬繁に行なう必要があり、装置の
維持管理が面倒であるという問題点も同時に指摘されて
いる。Furthermore, the submerged interface of the microbial carriers 6 in the expansion type fluidized tank 5 is visually judged by the on-site manager, and an operation is performed to remove excess sludge before the carriers 6 overflow. The actual situation is that the interface of No. 6 is lowered, and therefore, it is necessary to perform extremely troublesome work frequently, and it has also been pointed out that the maintenance and management of the device is troublesome.
本発明は、このような事情に鑑みてなされたもので、本
発明の目的とするところは、低コストで、維持管理も容
易な有機性廃水の処理装置を提供することにある。The present invention has been made in view of these circumstances, and an object of the present invention is to provide an organic wastewater treatment device that is low cost and easy to maintain and manage.
〈課題を解決するための手殴〉
」−記目的を達成するために、本発明は、ワ）、状の微
生物担体をｔ式８動させて処理を行なうエアリフト式流
動槽、ならびに膨脂式流動［曹の２槽の流動槽からなる
循環式生物処理装置と、固液分離するための限外濾過膜
装置とを備えた有機性廃水の処理装置において、
前記限外濾過膜装置の循環水の一部もしくは全部を、限
外濾過膜装置側の循環ポンプにより、膨脹式流動槽の底
部より圧入することを特徴とする。In order to achieve the above object, the present invention provides an air lift type fluidized tank in which treatment is carried out by moving microorganism carriers in the form of 8), and a fat-swelling type fluidized tank. In an organic wastewater treatment device comprising a circulating biological treatment device consisting of two fluidized fluidized tanks and an ultrafiltration membrane device for solid-liquid separation, the circulating water of the ultrafiltration membrane device A part or all of the liquid is press-fitted from the bottom of the expandable fluidized tank by a circulation pump on the ultrafiltration membrane device side.
更に、前記膨脹式流動槽内に、流動微生物担体の液中界
面を検出する検出器を設け、この検出器の作動により、
コントロール弁の開度を調整し、膨脹式流動槽内への循
環水の圧入量を制御することを特徴とする。Furthermore, a detector for detecting the submerged interface of the fluidized microbial carrier is provided in the expandable fluidized tank, and by the operation of this detector,
It is characterized by adjusting the opening degree of the control valve to control the amount of circulating water injected into the expansion type fluidized tank.
〈作用〉
以−Ｌの構成から明らかなように、流動処理水槽から限
外濾過膜モジュールに生物処理水を循環させる循環ポン
プにより、限外濾過膜モジュールから濃縮水を膨脹式流
動槽に返送するため、ポンプ１台の稼働で済む。<Function> As is clear from the configuration of L below, concentrated water is returned from the ultrafiltration membrane module to the expansion type fluidization tank by the circulation pump that circulates biologically treated water from the fluidization treatment tank to the ultrafiltration membrane module. Therefore, only one pump is required.
さらに、膨脹式流動槽内に微生物担体の界面高さを検知
できる検出器が設けられ、この検出器の作動により膨脂
式流動１曾内に圧入される流０を調整できるため、槽外
に溢流するのを防止できる。Furthermore, a detector that can detect the interface height of microbial carriers is installed inside the expansion fluidized fluid tank, and the flow 0 that is pressurized into the expanded fluidized fluid tank can be adjusted by the operation of this detector. Can prevent overflow.
〈実施例〉
以下、本発明に係る有機性廃水の処理装置の一実施例に
ついて、添付図面を参照しながら詳細に説明する。<Example> Hereinafter, an example of the organic wastewater treatment apparatus according to the present invention will be described in detail with reference to the accompanying drawings.
第１図は本発明に係る有機性廃水の処理装置のフローチ
ャート図を示すものである。FIG. 1 shows a flowchart of an organic wastewater treatment apparatus according to the present invention.
本発明に係る装置についてフローチャー１・図を基に説
明すると、まず、有機性廃水は、幅２．５ｍｍｊ’ｉ；
度のスクリーン１て粗雑物が除去され、流量調整槽２内
にｔん入される。この流帝凋整槽２に貯留された廃水は
、流＠調整ポンプ３により、計量槽４を介して膨張式流
動槽５内に流入される。そして、膨張式流動槽５内には
、比重的２、粉径約１ｍｍφの粒状担体６が投入されて
いる。To explain the apparatus according to the present invention based on flowchart 1 and the diagram, first, organic wastewater has a width of 2.5 mmj'i;
The impurities are removed using a screen 1, and the waste is poured into a flow rate regulating tank 2. The wastewater stored in the flow adjustment tank 2 is caused to flow into the expansion type fluidization tank 5 via the metering tank 4 by the flow adjustment pump 3. A granular carrier 6 having a specific gravity of 2 and a powder diameter of approximately 1 mmφ is placed in the expansion type fluidized tank 5.
さらに、この膨脹式流動槽５ては、後述する循環ポンプ
１３を動力源とした上向流により、粒状担体６を膨潤さ
せる。この粒状担体６には、汚泥を高密度にイＮｊ着さ
せてあり、ばっ気は行なわず、溶存酸素を１ｍｇ／、Ｃ
以下の低濃度、もしくは溶存酸素Ｏｍｇ／、ｅの状態に
保持する。Further, in this expansion type fluidized tank 5, the granular carrier 6 is swollen by an upward flow using a circulation pump 13 as a power source, which will be described later. This granular carrier 6 has sludge deposited at a high density, and dissolved oxygen is 1 mg/C without aeration.
The concentration of dissolved oxygen is maintained at the following low concentration or dissolved oxygen Omg/, e.
さらに、この膨脹式流動槽５内には、光源２０と受光器
２１とが設置されており、微生物担体６の界面が、この
受光器２０以上に上昇した場合、警報を発するように構
成されている。Furthermore, a light source 20 and a light receiver 21 are installed in this expansion type fluidized tank 5, and it is configured to issue an alarm when the interface of the microorganism carrier 6 rises above the light receiver 20. There is.
」二記膨脹式流動槽５からの溢流水は、次にエアリフト
式流動槽８内に流入する。このエアリフト式流動槽８内
にも膨脹式流動槽５て使用した担体と同等もしくはそれ
より粒子径の小さい、例えば０．３〜０． ５ｍｍφ程
度の微生物担体が投入され、ブロア１０によるエアリフ
ト効果て１■体９を流動槽８内で循環させる構成である
。The overflow water from the expansion fluidization tank 5 then flows into the airlift fluidization tank 8. This air-lift fluidized fluidized tank 8 also has a particle size equal to or smaller than that of the carrier used in the expanded fluidized fluidized tank 5, for example, 0.3-0. Microbial carriers with a diameter of about 5 mm are introduced, and one body 9 is circulated in the fluidized tank 8 by the air lift effect of the blower 10.
なお、エアリフト式流動槽８内における溶存酸素は１ｍ
ｇ／、ｅ前後に保持し、好気状態とするが、不必要に溶
存酸素濃度を高くせず、循環水による膨脹式流動槽５の
溶存酸素濃度を抑える。In addition, dissolved oxygen in the air lift type fluidized tank 8 is 1 m
g/, e to maintain an aerobic state, but do not unnecessarily increase the dissolved oxygen concentration, and suppress the dissolved oxygen concentration in the expandable fluidized fluid tank 5 by circulating water.
次いで、エアリフト式流動槽８の」−澄液は、口幅０．
１〜０．１５ｍｍのマイクロスクリーン１１により担体
および狭雑物を分離回収した後、流動処理水槽１２内に
流入される。この流動処理水槽１２に貯留された生物処
理水は、前述した循環ポンプ１３により限外濾過膜モジ
ュール１４に供給され、ここで透過水と濃縮水とに分離
される。Next, the clear liquid in the air-lift type fluidized tank 8 has a mouth width of 0.
After the carriers and impurities are separated and recovered by a micro screen 11 of 1 to 0.15 mm, they are flowed into a fluid treatment water tank 12. The biologically treated water stored in the fluidized water tank 12 is supplied to the ultrafiltration membrane module 14 by the aforementioned circulation pump 13, where it is separated into permeated water and concentrated water.
さらに、この限外濾過膜モジュール１４での濃縮水は、
膨張式流動槽返送バルブ２２と、流動処理水槽返送バル
ブ２３とにより、それぞれ返送量を調整されて、循環さ
れることになる。Furthermore, the concentrated water in this ultrafiltration membrane module 14 is
The return amount is adjusted by the expansion type fluidized tank return valve 22 and the fluidized fluidized tank return valve 23, respectively, and the water is circulated.
すなわち、膨脹式流動槽５内の担体６を流動させるため
の循環水の供給手段として、循環ポンプ１３により限外
濾過膜モジュール１４に供給される生物処理水のうちの
濃縮水の一部が、バルブ２２を通じて膨脹式流動槽５内
に供給されるとともに、他方のバルブ２３により濃縮水
の一部は流動処理水槽１２に返送されることになる。That is, part of the concentrated water of the biologically treated water supplied to the ultrafiltration membrane module 14 by the circulation pump 13 as a circulating water supply means for fluidizing the carrier 6 in the expansion fluidization tank 5. The concentrated water is supplied into the expansion fluidized fluidized tank 5 through the valve 22, and a portion of the concentrated water is returned to the fluidized fluidized water tank 12 by the other valve 23.
このとき、膨脹式流動槽５内への濃縮水の返送量は、微
生物担体６が膨潤する程度、および膨脂式ｌｈ動槽５内
の溶存酸素濃度を低レベルに保つ程度を目安として調節
する。At this time, the amount of concentrated water returned to the expansion fluidization tank 5 is adjusted based on the extent to which the microorganism carriers 6 swell and the dissolved oxygen concentration in the expansion fluidization tank 5 is maintained at a low level. .
さらに、限外濾過膜モジュール１４内の透過水は、処理
水として殺菌後放流あるいは再利用される。Furthermore, the permeated water within the ultrafiltration membrane module 14 is sterilized and then discharged or reused as treated water.
〈発明の効果〉
以」二説明した通り、本発明の装置によれば、従来の装
置に比べ、循環ポンプが１台で済み、ランニングコスト
が２分の１〜３分の１稈度に削減でき、従来の装置と同
等以−にのＢＯＤ除去能力、および窒素除去能力が得ら
れる。<Effects of the Invention> As explained below, according to the device of the present invention, compared to conventional devices, only one circulation pump is required, and the running cost is reduced to 1/2 to 1/3. BOD removal capacity and nitrogen removal capacity equivalent to or greater than conventional equipment can be obtained.
したがって、従来と同等の処理能力を維持した上で、大
幅なコストダウンを招来するという効果を有する。Therefore, it has the effect of significantly reducing costs while maintaining the same processing capacity as the conventional method.
さらに、膨脹式流動槽内の微生物担体界面が自動的に検
出でき、装置の紐侍管理が容易になるという効果を右゛
する。Furthermore, the microbial carrier interface within the expandable fluidized tank can be automatically detected, which has the effect of facilitating equipment management.
第１図は本発明による有ＪＦＩ性廃水の処理装置を示す
フローチャート図、第２図は従来の処理装置におけるフ
ローチャー１・図である。
５・・・膨脹式流動槽
８・・・エアリフト式流動１曹
９・・・粒状担体
１０・・ブロア
１２・・・流動処理水１曹
１３・・・循環ポンプ
１４・・・限外濾過膜モジュール
２０・・・光源
２１・・・受光器
２２・・・膨脂式１ん両槽返送バルブ
２３・・・流動処理水槽返送バルブ
５膨脹式流動槽
８工アリフト式流動槽
６．９粒状担体
１０７０ア
１２流動処理水槽
１３循環ポンプ
１４限外濾過膜モジユール
２０光源
２１受光器
２２膨脹式流動槽返送バルブ
２３流動処理水槽返送バルブ
第２区FIG. 1 is a flowchart showing a JFI-containing wastewater treatment apparatus according to the present invention, and FIG. 2 is a flowchart 1 of a conventional treatment apparatus. 5... Expandable fluidized tank 8... Airlift type fluidized 1-carbon 9... Granular carrier 10... Blower 12... Fluidized treated water 1-carbon 13... Circulation pump 14... Ultrafiltration membrane Module 20... Light source 21... Light receiver 22... Fat expansion type single tank return valve 23... Fluid treatment water tank return valve 5 Expansion type fluidized tank 8 Alilift type fluidized tank 6.9 Granular carrier 1070A 12 Fluid treatment tank 13 Circulation pump 14 Ultrafiltration membrane module 20 Light source 21 Light receiver 22 Expandable fluid tank return valve 23 Fluid treatment tank return valve 2nd section
Claims (1)
フト式流動槽、ならびに膨脹式流動槽の２槽の流動槽か
らなる循環式生物処理装置と、固液分離するための限外
濾過膜装置とを備えた有機性廃水の処理装置において、 前記限外濾過膜装置の循環水の一部もしくは全部を、限
外濾過膜装置側の循環ポンプにより、膨脹式流動槽の底
部より圧入することを特徴とする有機性廃水の処理装置
。 ２、前記膨脹式流動槽内に、流動微生物担体の液中界面
を検出する検出器を設け、この検出器の作動により、コ
ントロール弁の開度を調整し、膨脹式流動槽内への循環
水の圧入量を制御することを特徴とする請求項１記載の
有機性廃水の処理装置。[Scope of Claims] 1. A circulating biological treatment device consisting of two fluidization tanks, an airlift fluidization tank and an expansion fluidization tank, which perform treatment by fluidizing granular microbial carriers, and a system for solid-liquid separation. In an organic wastewater treatment device equipped with an ultrafiltration membrane device, part or all of the circulating water of the ultrafiltration membrane device is pumped to the bottom of an expandable fluidized tank by a circulation pump on the ultrafiltration membrane device side. An organic wastewater treatment device characterized by high pressure injection. 2. A detector for detecting the submerged interface of the fluidized microbial carrier is installed in the expandable fluidized tank, and the operation of this detector adjusts the opening degree of the control valve to prevent circulating water into the expandable fluidized tank. 2. The organic wastewater treatment apparatus according to claim 1, wherein the injected amount of the organic wastewater is controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2329789A JP3039682B2 (en) | 1990-11-30 | 1990-11-30 | Organic wastewater treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2329789A JP3039682B2 (en) | 1990-11-30 | 1990-11-30 | Organic wastewater treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04200697A true JPH04200697A (en) | 1992-07-21 |
| JP3039682B2 JP3039682B2 (en) | 2000-05-08 |
Family
ID=18225278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2329789A Expired - Fee Related JP3039682B2 (en) | 1990-11-30 | 1990-11-30 | Organic wastewater treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3039682B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0861808A3 (en) * | 1997-02-28 | 2001-06-20 | Kuraray Co., Ltd. | Waste water treatment apparatus |
| EP1584606A1 (en) * | 2004-03-09 | 2005-10-12 | Passavant-Roediger Umwelttechnik GmbH | Method for biological recovering water from waste water by means of a fluidized bed reactor |
| CN104828943A (en) * | 2015-03-31 | 2015-08-12 | 北京德威华泰设备制造有限公司 | Floating type water distributor |
| JP2016000373A (en) * | 2014-06-11 | 2016-01-07 | メタウォーター株式会社 | Cleaning method of floating filter medium layer |
-
1990
- 1990-11-30 JP JP2329789A patent/JP3039682B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0861808A3 (en) * | 1997-02-28 | 2001-06-20 | Kuraray Co., Ltd. | Waste water treatment apparatus |
| EP1584606A1 (en) * | 2004-03-09 | 2005-10-12 | Passavant-Roediger Umwelttechnik GmbH | Method for biological recovering water from waste water by means of a fluidized bed reactor |
| JP2016000373A (en) * | 2014-06-11 | 2016-01-07 | メタウォーター株式会社 | Cleaning method of floating filter medium layer |
| CN104828943A (en) * | 2015-03-31 | 2015-08-12 | 北京德威华泰设备制造有限公司 | Floating type water distributor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3039682B2 (en) | 2000-05-08 |
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