JP3039682B2 - Organic wastewater treatment equipment - Google Patents
Organic wastewater treatment equipmentInfo
- Publication number
- JP3039682B2 JP3039682B2 JP2329789A JP32978990A JP3039682B2 JP 3039682 B2 JP3039682 B2 JP 3039682B2 JP 2329789 A JP2329789 A JP 2329789A JP 32978990 A JP32978990 A JP 32978990A JP 3039682 B2 JP3039682 B2 JP 3039682B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- organic wastewater
- fluidized
- inflatable
- 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.)
- Expired - Fee Related
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
Landscapes
- Biological Treatment Of Waste Water (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
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 apparatus combining a fluidized bed biological treatment apparatus and an ultrafiltration membrane apparatus.
〈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 apparatus is a combination of a fluidized bed biological treatment apparatus and an ultrafiltration membrane apparatus.
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−ン１で粗雑物が除去され、流量調整槽
２内へ流入される。そして、この流量調整槽２に貯留さ
れた廃水は、流量調整ポンプ３により、計量槽４を介し
て膨脹式流動槽５内に流入される。Referring to FIG. 2, the structure of the organic wastewater is first removed from the organic wastewater by a screen 1 and then introduced into a flow control tank 2. Then, the wastewater stored in the flow rate adjusting tank 2 is flowed into the inflatable fluidizing tank 5 through the measuring tank 4 by the flow rate adjusting pump 3.
上記膨脹式流動槽５内には、比重約２、粒径約1mmφ
の粒状担体６が投入されており、循環ポンプ７を動力源
とした上向流により粒上担体６を膨潤させる。The inflatable fluidized tank 5 has a specific gravity of about 2 and a particle size of about 1 mmφ.
The granular carrier 6 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、膨脹式流動槽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0.3〜0.5mmφ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で循環させる。Then, the overflow water of the expansion type fluidized tank 5 flows into the air lift type fluidized tank 8 next. A carrier 9 having a particle diameter of about 0.3 to 0.5 mmφ having a particle size equivalent to or slightly smaller than the carrier used in the expansion
And the carrier 9 is circulated in the air-lift type fluidized tank 8 by the air-lift effect of the blower 10.
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−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−ル14に供給され、ここで透過水と濃度
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。After that, the supernatant water of the air-lift type fluidized tank 8 is flown into the fluidized water tank 12 after separating and recovering the carrier and the contaminants by the microscreen 11. This fluidized water tank
The biologically treated water stored in 12 is supplied to an ultrafiltration membrane module 14 by a circulation pump 13, where it is separated into permeated water and concentrated water, and the concentrated water is returned to the fluidized water treatment tank 12. The permeated water is discharged or reused after sterilization 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、膨脹式流動槽５内の微生物担体６を上向流で膨潤さ
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−ル14に生物処理水を供給する循環ポンプ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。<Problem to be Solved by the Invention> As described above, in a conventional organic wastewater treatment apparatus combining a fluidized-bed biological treatment apparatus and an ultrafiltration membrane apparatus, the microorganism carrier 6 in the inflatable fluidized tank 5 is used. Pump 7 for swelling water in an upward flow, and circulating pump 13 for supplying biological treatment water from fluidized water tank 12 to ultrafiltration membrane module 14
And two circulating pumps 7 and 13 are required, and each operates independently. Therefore, a drawback that the initial cost and the running cost of the device are increased is pointed out.
さらに、膨脹式流動槽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頻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。In addition, the submerged interface of the microbial carrier 6 in the inflatable fluidized tank 5 is visually judged by a manager at the site, and an operation of removing extra sludge before overflow of the carrier 6 is performed. In fact, it is pointed out that the interface of No. 6 is lowered, so that extremely troublesome work must be performed frequently and the maintenance of the apparatus 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 such circumstances,
An object of the present invention is to provide an organic wastewater treatment apparatus that is low-cost and easy to maintain.
〈課題を解決するための手段〉 上記目的を達成するために、本発明は、粒上の微生物
担体を流動させて処理を行なうエアリフト式流動槽、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。<Means for Solving the Problems> In order to achieve the above object, the present invention provides an air-lift type fluidizing tank for treating a microorganism carrier on particles by flowing the same, and an expanding type fluidizing tank. A biological wastewater treatment apparatus, and an organic wastewater treatment apparatus equipped with an ultrafiltration membrane device for solid-liquid separation, wherein part or all of the circulating water of the ultrafiltration membrane device,
The circulating pump on the side of the ultrafiltration membrane device is characterized by being press-fitted from the bottom of the expansion type fluidized vessel.
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−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。Further, a detector for detecting the interface of the flowing microorganism carrier in the liquid is provided in the inflatable fluid tank, and by operating the detector, the opening of the control valve is adjusted, and the detector is moved into the inflatable fluid tank. It is characterized by controlling the injection amount of circulating water.
〈作用〉 以上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−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−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。<Operation> As is apparent from the above configuration, the circulating pump that circulates the biological treatment water from the fluidized treatment water tank to the ultrafiltration membrane module allows the concentrated water to be supplied from the ultrafiltration membrane module to the inflatable fluidized tank. Only one pump needs to be operated.
さらに、膨脹式流動槽内の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
脹式流動槽内に圧入される流量を調整できるため、槽外
に溢流するのを防止できる。Further, a detector capable of detecting the height of the interface of the microorganism carrier in the inflatable fluidized tank is provided, and the flow rate of the pressure injected into the inflatable fluidized tank can be adjusted by the operation of the detector, so that the fluid overflows out of the vessel. Can be prevented.
〈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 an organic wastewater treatment device 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−
チャ−ト図を示すものである。FIG. 1 is a flow chart of an organic wastewater treatment apparatus according to the present invention.
It shows a chart.
本発明に係る装置についてフローチャート図を基に説
明すると、まず、有機性廃水は、幅2.5mm程度のスクリ
−ン１で粗雑物が除去され、流量調整槽２内に流入され
る。この流量調整槽２に貯留された廃水は、流量調整ポ
ンプ３により、計量槽４を介して膨脹式流動槽５内に流
入される。そして、膨脹式流動槽５内には、比重約２、
粒径約1mmφの粒状担体６が投入されている。The apparatus according to the present invention will be described with reference to a flow chart. First, organic wastewater is subjected to a screen 1 having a width of about 2.5 mm to remove impurities and then flow into a flow control tank 2. The wastewater stored in the flow control tank 2 is flowed into the expansion type flow tank 5 through the measuring tank 4 by the flow control pump 3. And, in the inflatable fluidized tank 5, a specific gravity of about 2,
A granular carrier 6 having a particle size of about 1 mmφ is charged.
さらに、この膨脹式流動槽５では、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、汚泥を高密度に付着させて
あり、ばっ気は行なわず、溶存酸素を1mg/以下の低濃
度、もしくは溶存酸素0mg/の状態に保持する。Further, in the expansion type fluid tank 5, the granular carrier 6 is swollen by an upward flow using a circulating pump 13 described later as a power source. Sludge is attached to the granular carrier 6 at a high density, aeration is not performed, and the dissolved oxygen is kept at a low concentration of 1 mg / or less or a dissolved oxygen of 0 mg /.
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。Further, a light source 20 and a light receiver
21 is provided, and an alarm is issued when the interface of the microorganism carrier 6 rises above the light receiver 20.
上記膨脹式流動槽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で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で担体
９を流動槽８内で循環させる構成である。The overflow water from the expansion type flow tank 5 flows into the air lift type flow tank 8 next. A microbial carrier having a particle size equivalent to or smaller than that of the carrier used in the inflatable fluidizing tank 5 is introduced into the airlifting fluidizing tank 8, for example, about 0.3 to 0.5 mmφ. It is configured to circulate in the fluidizing tank 8.
なお、エアリフト式流動槽８内における溶存酸素は1m
g/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。The dissolved oxygen in the airlift type fluidized tank 8 is 1 m
g / atmosphere to maintain the aerobic state, but do not unnecessarily increase the dissolved oxygen concentration and suppress the dissolved oxygen concentration in the inflatable fluidized tank 5 with circulating water.
次いで、エアリフト式流動槽８の上澄液は、目幅0.1
〜0.15mmのマイクロスクリ−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−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 supernatant liquid of the air-lift type fluidized tank 8 has a mesh width of 0.1
After the carrier and contaminants are separated and collected by a microscreen 11 of about 0.15 mm, the carrier and the contaminants are introduced into a fluidized water tank 12.
The biologically treated water stored in the fluidized water tank 12 is supplied to the ultrafiltration membrane module 14 by the circulation pump 13 described above, where it is separated into permeated water and concentrated water.
さらに、この限外濾過膜モジュ−ル14での濃縮水は、
膨脹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。Further, the concentrated water in the ultrafiltration membrane module 14 is:
Inflatable fluid tank return valve 22 and fluidized treatment tank return valve
According to 23, the amount of return is adjusted and circulation is performed.
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−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, as means for supplying circulating water for flowing the carrier 6 in the inflatable fluidized tank 5, a part of the concentrated water of the biological treatment water supplied to the ultrafiltration membrane module 14 by the circulating pump 13 is used. Is supplied into the inflatable fluidized tank 5 through the valve 22, and a part of the concentrated water is returned to the 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、および膨脹式流動槽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 return amount of the concentrated water into the inflatable fluidized tank 5 is
The degree of swelling of the microorganism carrier 6 and the degree of keeping the concentration of dissolved oxygen in the inflatable fluidized tank 5 at a low level are adjusted as a guide.
さらに、限外濾過膜モジュ−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。Further, the permeated water in the ultrafiltration membrane module 14 is discharged after sterilization or reused as treated water.
〈発明の効果〉 以上説明した通り、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程度に削減でき、従来の装置と同
等以上のBOD除去能力、および窒素除去能力が得られ
る。<Effects of the Invention> As described above, according to the apparatus of the present invention, only one circulation pump is required, and the running cost can be reduced to about 1/2 to 1/3 of the conventional apparatus. BOD removal ability and nitrogen removal ability equivalent to or higher than the apparatus of the present invention 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, while maintaining the same processing capacity as before,
This has the effect of significantly reducing costs.
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、装置の維持管理が容易になるという効果を有
する。Further, there is an effect that the interface of the microorganism carrier in the inflatable fluidized tank can be automatically detected, and the maintenance of the apparatus becomes easy.
第１図は本発明による有機性廃水の処理装置を示すフロ
−チャ−ト図、第２図は従来の処理装置におけるフロ−
チャ−ト図である。 ５……膨脹式流動槽 ８……エアリフト式流動槽 ９……粒状担体 10……ブロア 12……流動処理水槽 13……循環ポンプ 14……限外濾過膜モジュ−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FIG. 1 is a flowchart showing an organic wastewater treatment apparatus according to the present invention, and FIG. 2 is a flow chart in a conventional treatment apparatus.
It is a chart. 5 ... expansion type fluid tank 8 ... air lift type fluid tank 9 ... granular carrier 10 ... blower 12 ... fluid treatment water tank 13 ... circulation pump 14 ... ultrafiltration membrane module 20 ... light source 21 ... … Receiver 22 …… Return valve for inflatable fluidized tank 23 …… Return valve for fluidized water tank
───────────────────────────────────────────────────── フロントページの続き (73)特許権者 999999999 日立化成テクノプラント株式会社 東京都千代田区神田駿河台３―１―２ (72)発明者 山本 眞 東京都千代田区神田駿河台３―１―２ 日立化成テクノプラント株式会社内 (72)発明者 宮城 透 東京都新宿区西新宿２丁目１番１号 日 立化成工業株式会社内 (72)発明者 沢田 貞義 東京都千代田区神田駿河台３―１―２ 日立化成テクノプラント株式会社内 (72)発明者 内田 達也 東京都千代田区神田駿河台３―１―２ 日立化成テクノプラント株式会社内 (72)発明者 久保田 律男 東京都昭島市つつじが丘２―５―17― 204 (72)発明者 佐脇 順一郎 神奈川県横浜市金沢区能見台２丁目14番 ５号 (72)発明者 小口 深志 東京都練馬区光が丘７―７―１―506 (56)参考文献 特開 昭61−209097（ＪＰ，Ａ) 特開 昭61−287500（ＪＰ，Ａ) 特開 昭56−78694（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 3/02 - 3/10 C02F 3/28 - 3/34 ──────────────────────────────────────────────────続 き Continuing on the front page (73) Patent holder 999999999 Hitachi Chemical Technoplant Co., Ltd. 3-1-2 Kanda Surugadai, Chiyoda-ku, Tokyo (72) Inventor Makoto Yamamoto 3-1-2 Kanda Surugadai, Chiyoda-ku, Tokyo Hitachi Kasei Techno Plant Co., Ltd. (72) Inventor Toru Miyagi 2-1-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Nikka Kasei Kogyo Co., Ltd. (72) Inventor Sadayoshi Sawada 3-1-2, Kanda Surugadai, Chiyoda-ku, Tokyo Hitachi Chemical Techno Plant Co., Ltd. (72) Inventor Tatsuya Uchida 3-1-2 Kanda Surugadai, Chiyoda-ku, Tokyo Hitachi Chemical Techno Plant Co., Ltd. (72) Inventor Ritsuo Kubota 2-5-17- Tsutsugaoka, Akishima City, Tokyo 204 (72) Inventor Junichiro Sawaki 2-14-5 Nomidai, Kanazawa-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Fukashi Oguchi 7-7-1-506 Hikarigaoka, Nerima-ku, Tokyo (56) References JP-A-61-209097 (JP, A) JP-A-61-287500 (JP, A) JP-A-56-78694 (JP, A) (58) Field surveyed (Int. Cl. 7 , DB name) C02F 3/02-3/10 C02F 3/28-3/34
Claims (2)
うエアリフト式流動槽、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。1. A circulating biological treatment apparatus comprising an air-lift type fluidized tank for flowing granular microbial carriers for treatment and an expansion type fluidized tank, and ultrafiltration for solid-liquid separation. An organic wastewater treatment apparatus provided with a membrane device, wherein part or all of the circulating water of the ultrafiltration membrane device is press-fitted from the bottom of the inflatable fluidized tank by a circulation pump on the ultrafiltration membrane device side. An organic wastewater treatment apparatus, characterized in that:
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−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。2. A detector for detecting an interface in a liquid of a moving microorganism carrier in a liquid is provided in the inflatable fluid tank, and the operation of the detector adjusts an opening of a control valve, thereby providing an inflatable fluid tank. 2. The organic wastewater treatment apparatus according to claim 1, wherein the amount of circulating water injected into the inside 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 JPH04200697A (en) | 1992-07-21 |
| JP3039682B2 true 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) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6007712A (en) * | 1997-02-28 | 1999-12-28 | Kuraray Co., Ltd. | Waste water treatment apparatus |
| DE102004020235A1 (en) * | 2004-03-09 | 2005-09-29 | Passavant-Roediger Umwelttechnik Gmbh | Process to abstract potable water from effluent water by sedimentation, fluidised bed reactor, microfiltration and ultraviolet light disinfection |
| JP6329007B2 (en) * | 2014-06-11 | 2018-05-23 | メタウォーター株式会社 | Cleaning method for floating filter media layer |
| CN104828943B (en) * | 2015-03-31 | 2017-01-11 | 北京德威华泰设备制造有限公司 | Floating type water distributor |
-
1990
- 1990-11-30 JP JP2329789A patent/JP3039682B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04200697A (en) | 1992-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100441208B1 (en) | Batch style waste water treatment apparatus using biological filtering process and waste water treatment method using the same | |
| BG109181A (en) | Method and device for deep biological treatament of waste waters | |
| KR20210091951A (en) | Automatic Sedimentation Circulation Breeding Tank for Bioflock aquafarm. | |
| JP3039682B2 (en) | Organic wastewater treatment equipment | |
| KR100497810B1 (en) | System of circulated sequencing batch Reactor with media containing zeolite for organic matters, nitrogen and phosphorus removal in sewage and waste waters | |
| JP2002307088A (en) | Wastewater treatment apparatus | |
| US6099731A (en) | Method and apparatus for treating water | |
| KR20040020325A (en) | A method for treating the graywater by membrane | |
| JPH09225487A (en) | Biological treating device | |
| JPH06292900A (en) | Waste water treating device using ultrafilter membrane | |
| JP3433601B2 (en) | Wastewater recovery and purification equipment | |
| JP2006038871A (en) | Treatment apparatus of washing waste water | |
| CN208814846U (en) | Oil-contained waste water treatment system | |
| JPH09253687A (en) | Anaerobic and aerobic treatment apparatus for waste water | |
| JP4029950B2 (en) | Nitrogen removal method and equipment for contaminated water area | |
| KR100327095B1 (en) | Method for nitrate removal in ground water | |
| JP2820707B2 (en) | Fixed bed deep wastewater treatment equipment | |
| JP4710146B2 (en) | Pressurized fluidized bed wastewater treatment system | |
| JP3350424B2 (en) | Oil-containing wastewater treatment apparatus and its treatment method | |
| JPH0710384B2 (en) | Sewage treatment equipment | |
| JP2609181B2 (en) | Biological nitrification denitrification method and apparatus for organic wastewater | |
| KR200171727Y1 (en) | Processing system for excretions of animals | |
| JPH10314712A (en) | Garbage disposer | |
| JP4109492B2 (en) | Sludge treatment method | |
| JP2000042587A (en) | Biological waste water treating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R370 | Written measure of declining of transfer procedure |
Free format text: JAPANESE INTERMEDIATE CODE: R370 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |