JPH08243586A - Water treating device - Google Patents
Water treating deviceInfo
- Publication number
- JPH08243586A JPH08243586A JP8198995A JP8198995A JPH08243586A JP H08243586 A JPH08243586 A JP H08243586A JP 8198995 A JP8198995 A JP 8198995A JP 8198995 A JP8198995 A JP 8198995A JP H08243586 A JPH08243586 A JP H08243586A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- water
- treated
- aerobic
- anaerobic
- 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
Landscapes
- Biological Treatment Of Waste Water (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、窒素除去を必要とする
廃水に対し、生物処理を用いて窒素除去を行う水処理装
置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment device for removing nitrogen from waste water requiring nitrogen removal by biological treatment.
【０００２】[0002]
【従来の技術】廃水の処理方法として、活性汚泥法、接
触曝気法、回転円板法等が知られているが、例えば廃棄
物の埋立地から出る廃水のように、水量、水質の変動が
大きい廃水の場合、活性汚泥法により窒素除去を行う
と、返送汚泥等によるＭＬＳＳの管理が難しく、また汚
泥分離のための沈澱池が必要となる。2. Description of the Related Art Activated sludge method, contact aeration method, rotating disk method and the like are known as wastewater treatment methods. In the case of large wastewater, if nitrogen is removed by the activated sludge method, it is difficult to control MLSS by returning sludge and a sedimentation tank for sludge separation is required.
【０００３】そのため、一般には、返送汚泥をなくすた
め生物膜法である接触曝気法や回転円板法が採用されて
おり、その代表的な例としては、図３に示すように、散
気装置14を設けた好気槽１と嫌気槽２にそれぞれ充填材
を保持した固定床15を形成した方式のものがある。Therefore, in general, the contact aeration method or the rotating disk method, which is a biofilm method, is adopted to eliminate the returned sludge, and a typical example thereof is an air diffuser as shown in FIG. There is a system in which a fixed bed 15 holding a filler is formed in each of the aerobic tank 1 and the anaerobic tank 2 provided with 14.
【０００４】[0004]
【発明が解決しようとする課題】しかし、この従来方式
では、大型の好気槽を必要とする。そのため、近年の用
地不足に対応して、よりコンパクトな施設を目的とした
方式のものが要望されるようになってきた。However, this conventional method requires a large aerobic tank. Therefore, in response to the shortage of land in recent years, a system aiming at a more compact facility has been demanded.
【０００５】本発明は、上記の従来方式における問題を
解決し、維持管理が容易でしかもコンパクトな施設で、
廃水中の窒素除去を効率よく行うことのできる水処理装
置を提供しようとするものである。The present invention solves the above-mentioned problems in the conventional system, and is a facility that is easy to maintain and is compact,
An object of the present invention is to provide a water treatment device that can efficiently remove nitrogen in wastewater.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めの本発明の構成について、実施例の図面を参照して説
明すると、本発明は、窒素除去を必要とする廃水を流入
して、好気条件下で生物学的に硝化処理する好気槽１
と、該好気槽１から移送された被処理水を嫌気条件下で
生物学的に脱窒処理する嫌気槽２とで構成されており、
上記好気槽１には、硝化菌を結合固定化する担体４が投
入されているとともに、酸素含有ガスを供給しかつ槽内
循環流を生起する散気装置７が設けられ、また、嫌気槽
２には、脱窒菌を固定する充填材を保持した固定床10が
設けられているとともに、槽内被処理水を循環させる手
段12，13が設けられていることを特徴とするものであ
る。The structure of the present invention for achieving the above object will be described with reference to the drawings of the embodiments. The present invention is directed to the inflow of waste water which requires nitrogen removal. Aerobic tank for biological nitrification under aerobic conditions 1
And an anaerobic tank 2 for biologically denitrifying the water to be treated transferred from the aerobic tank 1 under anaerobic conditions,
The aerobic tank 1 is loaded with a carrier 4 for binding and immobilizing nitrifying bacteria, and is provided with an air diffuser 7 for supplying an oxygen-containing gas and producing a circulating flow in the tank. 2 is characterized in that it is provided with a fixed bed 10 holding a packing material for fixing denitrifying bacteria, and means 12 and 13 for circulating the treated water in the tank.
【０００７】[0007]
【作用】流入管５より好気槽１に流入した被処理水は、
散気装置７より吐出された酸素含有ガスにより流動状態
となり、下降流路ａから上昇流路ｂへと繰返し循環し、
同じく流動している担体４と接触し、その際、担体４に
高密度に固定された硝化菌により、被処理水に含まれる
アンモニア性窒素が酸化され、硝酸性及び亜硝酸性窒素
になる。[Function] The water to be treated flowing from the inflow pipe 5 into the aerobic tank 1 is
The oxygen-containing gas discharged from the air diffusing device 7 makes it in a fluidized state and repeatedly circulates from the descending flow path a to the ascending flow path b,
Similarly, the nitrifying bacterium, which is brought into contact with the flowing carrier 4 and is fixed to the carrier 4 at a high density, oxidizes the ammoniacal nitrogen contained in the water to be treated to form nitric acid and nitrite nitrogen.
【０００８】 ２ＮＨ4 +＋３Ｏ2 →２ＮＯ2 -＋２Ｈ2 Ｏ＋４Ｈ+ ２ＮＯ2 ■＋Ｏ2 →２ＮＯ3 - [0008] 2NH 4 + + 3O 2 → 2NO 2 - + 2H 2 O + 4H + 2NO 2 ■ + O 2 → 2NO 3 -
【０００９】酸化処理された被処理水は好気槽１より流
出するが、担体４は流出防止板９ａにより流出が阻止さ
れる。流出した被処理水は、移送管６により嫌気槽の下
部に流入する。The water to be treated which has been subjected to the oxidization flows out from the aerobic tank 1, but the carrier 4 is prevented from flowing out by the outflow prevention plate 9a. The treated water that has flowed out flows into the lower part of the anaerobic tank through the transfer pipe 6.
【００１０】嫌気槽２に流入した被処理水は、固定床10
の充填材と接触しながら上部へと流動する。また、嫌気
槽２では、循環管路12のポンプ13により、被処理水は、
嫌気槽２上部より引き抜かれて同下部に供給され、循環
することにより、充填材との接触が増大する。それで、
被処理水中に含まれる硝酸性及び亜硝酸性窒素は、充填
材の表面に高密度に固定された脱窒菌と接触することに
より、Ｎ2 ガスにまで還元され、処理される。The water to be treated which has flowed into the anaerobic tank 2 is fixed bed 10
It flows to the upper part while contacting the filler. Moreover, in the anaerobic tank 2, the water to be treated is
By being extracted from the upper part of the anaerobic tank 2 and supplied to the lower part of the anaerobic tank 2 and circulating, the contact with the filler is increased. So,
Nitrate and nitrite nitrogen contained in the water to be treated are reduced to N 2 gas and treated by contacting with the denitrifying bacteria that are densely fixed on the surface of the filler.
【００１１】 ２ＮＯ2 -＋６Ｈ→Ｎ2 ↑＋２Ｈ2 Ｏ＋２ＯＨ- ２ＮＯ3 -＋10Ｈ→Ｎ2 ↑＋４Ｈ2 Ｏ＋２ＯＨ- 2NO 2 − + 6H → N 2 ↑ + 2H 2 O + 2OH − 2NO 3 − + 10H → N 2 ↑ + 4H 2 O + 2OH −
【００１２】嫌気槽２で還元処理され窒素を除去された
水は、嫌気槽２の上部より排出管11を経て次の工程に流
出されることになる。The water that has been reduced in the anaerobic tank 2 to remove nitrogen is discharged from the upper part of the anaerobic tank 2 through the discharge pipe 11 to the next step.
【００１３】[0013]
【実施例】以下、本発明の実施例について図面を参照し
ながら説明する。図１は本発明の一実施例を示す水処理
装置で、被処理水を導入して好気条件下で生物学的に処
理する好気槽１と、好気槽１から移送される被処理水
を、嫌気条件下で生物学的に処理する嫌気槽２とで構成
されている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a water treatment device showing an embodiment of the present invention, in which an aerobic tank 1 for introducing water to be treated and biologically treating it under aerobic conditions, and a treated material transferred from the aerobic tank 1 The anaerobic tank 2 treats water biologically under anaerobic conditions.
【００１４】好気槽１は、その中央部に所要長さの仕切
板３が垂設され、下降用の流路ａと上昇用の流路ｂと上
下の連通路ｃ，ｃとによる循環系路が形成されており、
槽内には硝化菌を結合固定化する担体４が投入されてい
る。そして、好気槽１の一側上部、すなわち下降流路ａ
の上部には被処理水の流入管５が、同じく、他側上部す
なわち上昇流路ｂの上部には、槽内の被処理水を次の嫌
気槽２に送り込む移送管６が設けられている。In the aerobic tank 1, a partition plate 3 having a required length is vertically provided at the center thereof, and a circulation system is constituted by a descending flow path a, an ascending flow path b, and upper and lower communication paths c, c. A road is formed,
A carrier 4 for binding and immobilizing nitrifying bacteria is placed in the tank. Then, one side upper part of the aerobic tank 1, that is, the descending flow path a
An inflow pipe 5 for treated water is provided in the upper part of the same, and a transfer pipe 6 for feeding the treated water in the tank to the next anaerobic tank 2 is provided in the upper part on the other side, that is, in the upper part of the ascending flow path b. .
【００１５】また、上昇流路ｂの底部には、酸素含有ガ
ス（空気等）を槽内に供給しかつ槽内循環流を生起する
散気装置７が槽外のブロワー８に接続して設けられてい
るとともに、上昇流路ｂの上部には、ウエッジワイヤ等
の担体流出防止板９ａが、下降流路ａの下部には担体誘
導板９ｂが、それぞれ傾斜して設けられている。At the bottom of the ascending flow path b, an air diffuser 7 for supplying an oxygen-containing gas (air, etc.) into the tank and generating a circulating flow in the tank is connected to a blower 8 outside the tank. In addition, a carrier outflow prevention plate 9a such as a wedge wire is provided in the upper part of the ascending flow path b, and a carrier guide plate 9b is provided in the lower part of the descending flow path a in an inclined manner.
【００１６】担体４は、例えば親水性のあるセルロース
繊維等により多孔質のものに形成され、粒径が２〜６m
m、比重が1.03程度のものが使用される。硝化菌を主体
とした微生物は、担体の外部表面及び気孔表面に結合固
定化される。The carrier 4 is formed of a porous material such as hydrophilic cellulose fiber and has a particle size of 2 to 6 m.
m, specific gravity of about 1.03 is used. Microorganisms mainly composed of nitrifying bacteria are bound and immobilized on the outer surface and pore surface of the carrier.
【００１７】嫌気槽２は、内部に脱窒菌を固定する、例
えばプラスチック等を任意の大きさ、形状に形成した充
填材を保持した固定床10が設けられ、固定床10の下方部
には、好気槽１よりの移送管６が接続され、固定床10の
上方部よりは、槽内の被処理水を流出させる排出管11が
設けられている。また、嫌気槽２の上部から下部を結ん
で、循環管路12が設けられており、ポンプ13により、槽
内の被処理水を下から上へと循環させるようになってい
る。The anaerobic tank 2 is provided with a fixed bed 10 for holding denitrifying bacteria, for example, a packing material formed of plastic or the like having an arbitrary size and shape, and a lower portion of the fixed bed 10 A transfer pipe 6 from the aerobic tank 1 is connected, and a discharge pipe 11 for discharging the water to be treated in the tank is provided above the fixed bed 10. A circulation pipe 12 is provided by connecting the upper part to the lower part of the anaerobic tank 2, and a pump 13 circulates the water to be treated in the tank from the bottom to the top.
【００１８】上記構成の装置では、被処理水はまず流入
管５より好気槽１の一側上部に流入する。槽内の被処理
水は散気装置７よりの酸素含有ガスの供給により下降流
路ａから上昇流路へと循環し、それにともなって担体４
も同様に循環される。それにより、被処理水は、好気条
件下において、担体に結合した硝化菌により生物学的に
処理され、被処理水中のアンモニア性窒素は酸化して硝
酸性及び亜硝酸性窒素となる。酸化処理された被処理水
は、オーバーフローして移送管６より嫌気槽２の下部に
流入される。In the apparatus having the above structure, the water to be treated first flows into the upper part of the aerobic tank 1 through the inflow pipe 5. The water to be treated in the tank is circulated from the descending flow path a to the ascending flow path by the supply of the oxygen-containing gas from the air diffuser 7, and accordingly the carrier 4
Is similarly circulated. As a result, the water to be treated is biologically treated by the nitrifying bacteria bound to the carrier under aerobic conditions, and the ammoniacal nitrogen in the water to be treated is oxidized into nitrate and nitrite nitrogen. The water to be treated that has been subjected to oxidation overflows and flows into the lower portion of the anaerobic tank 2 through the transfer pipe 6.
【００１９】嫌気槽２の下部に流入した被処理水は、固
定床10の充填材と接触しながら上昇し、循環管路12によ
り嫌気槽２の上部より引き抜かれ、嫌気槽２の下部に供
給されて循環し、充填材との接触機会が増大される。被
処理水中に含まれる硝酸性及び亜硝酸性窒素は、充填材
の表面に高密度に固定された脱窒菌と接触すること及び
槽内の有機炭素源によりＮ2 ガスにまで還元処理され
る。還元処理され窒素を除去された水は、オーバーフロ
ーして排出管11より次の工程に流出される。The water to be treated which has flowed into the lower part of the anaerobic tank 2 rises while coming into contact with the packing material of the fixed bed 10, and is withdrawn from the upper part of the anaerobic tank 2 by the circulation line 12 and supplied to the lower part of the anaerobic tank 2. It circulates and circulates, increasing the chance of contact with the filler. Nitrate and nitrite nitrogen contained in the water to be treated are brought into contact with denitrifying bacteria fixed on the surface of the packing material at high density and reduced to N 2 gas by the organic carbon source in the tank. The water that has undergone the reduction process and has the nitrogen removed overflows and is discharged from the discharge pipe 11 to the next step.
【００２０】図２は、本発明における好気槽１の他の実
施例を示したものである。この実施例では、図１の実施
例における仕切板３が除外され、好気槽１は単純化され
た構造となっており、槽底部には、槽外のブロワー８に
接続された散気装置７が設けられ、また、上部の一側に
は被処理水の流入管５が、同他側には槽内の被処理水を
嫌気槽２に送り込む移送管６が設けられている。そし
て、移送管６の設けられた上部の片隅部には、担体流止
防止板９ａが設けられ、槽内には上記同様の担体４が投
入されている。FIG. 2 shows another embodiment of the aerobic tank 1 according to the present invention. In this embodiment, the partition plate 3 in the embodiment of FIG. 1 is excluded, and the aerobic tank 1 has a simplified structure. The aeration device connected to the blower 8 outside the tank is provided at the bottom of the tank. 7, an inflow pipe 5 for the water to be treated is provided on one side of the upper portion, and a transfer pipe 6 for feeding the water to be treated in the tank to the anaerobic tank 2 is provided on the other side thereof. A carrier flow prevention plate 9a is provided at one corner of the upper portion where the transfer pipe 6 is provided, and a carrier 4 similar to the above is put in the tank.
【００２１】上記好気槽１内の被処理水と担体４は、散
気装置７よりの酸素含有ガスの供給によって、循環流動
し、被処理水は硝化処理され、処理された水は移送管６
より嫌気槽２の下部に送られることになる。The water to be treated and the carrier 4 in the aerobic tank 1 circulate and flow by the supply of the oxygen-containing gas from the air diffuser 7, the water to be treated is subjected to nitrification treatment, and the treated water is transferred to a transfer pipe. 6
It will be sent to the lower part of the anaerobic tank 2.
【００２２】好気槽に担体を用い嫌気槽に充填材を用い
た図１に示す本発明方式と、好気槽と嫌気槽に充填材を
用いた図３に示す従来の方式との比較試験（窒素除去試
験）を行った。その試験の条件を表１に、試験の結果を
表２に示す。A comparative test between the method of the present invention shown in FIG. 1 in which a carrier is used in the aerobic tank and the filler is used in the anaerobic tank and the conventional method shown in FIG. 3 in which the filler is used in the aerobic tank and the anaerobic tank. (Nitrogen removal test) was performed. The test conditions are shown in Table 1 and the test results are shown in Table 2.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【表２】 [Table 2]
【００２５】表２の試験結果をもとに、本発明方式と従
来方式における好気槽と嫌気槽の水槽容量の比較をする
と表３に示すとおりになる。表３の数値は、従来方式の
好気槽容量を100 として、それを基準にその他の方式の
水槽容量の値を算出した。Based on the test results of Table 2, comparison of the water tank capacities of the aerobic tank and the anaerobic tank in the method of the present invention and the conventional method is shown in Table 3. The values in Table 3 were calculated using the aerobic tank capacity of the conventional method as 100, and the values of the water tank capacities of other methods as a reference.
【００２６】[0026]
【表３】 [Table 3]
【００２７】[0027]
【発明の効果】以上述べたように、本発明によれば、好
気槽と嫌気槽とを備え、好気槽内においては親水性を有
する多孔質の担体が投入されるため、担体表面から内部
に向けて連通する気孔に微生物と被処理水が容易に入り
込み、硝化菌を主体とした微生物が担体表面及び気孔表
面に高密度に固定化されるとともに、循環流によって被
処理水と担体との接触が増大して、硝化処理能力が増大
される。そのため、好気槽の容量の縮小や滞留時間の短
縮が図れる。As described above, according to the present invention, since the aerobic tank and the anaerobic tank are provided and the hydrophilic porous carrier is charged in the aerobic tank, the carrier surface is Microorganisms and water to be treated easily enter the pores communicating to the inside, and the microorganisms mainly composed of nitrifying bacteria are immobilized on the surface of the carrier and the surface of the pores at a high density. Contact with the nitric acid and the nitrification capacity is increased. Therefore, the capacity of the aerobic tank and the residence time can be shortened.
【００２８】また、嫌気槽内においては、充填材による
固定床が形成されているとともに、被処理水の循環が行
われるため、充填材に固定された微生物と被処理水との
接触面積及び接触時間が大となり、高密度に微生物が固
定されるとともに、脱窒処理能力が増大される。そのた
め、嫌気槽の容量の縮小や滞留時間の短縮が図られる。Further, in the anaerobic tank, since the fixed bed is formed by the packing material and the water to be treated is circulated, the contact area and contact between the microorganisms fixed to the packing material and the water to be treated are provided. The time becomes longer, the microorganisms are fixed in high density, and the denitrification treatment capacity is increased. Therefore, the capacity of the anaerobic tank and the residence time can be shortened.
【００２９】その結果、生物処理によって窒素除去を行
うようにした水処理装置の容量をコンパクト化すること
ができることになり、また、微生物を担体及び充填材に
固定することにより、従来困難であった活性汚泥の管理
を省略でき、維持管理の容易な装置とすることができる
ようになった。As a result, the capacity of the water treatment device for removing nitrogen by biological treatment can be made compact, and it has been difficult to fix the microorganisms on the carrier and the filler. The management of activated sludge can be omitted and the device can be easily maintained and managed.
【図１】本発明の装置の一実施例を示す概略構成図であ
る。FIG. 1 is a schematic configuration diagram showing an embodiment of an apparatus of the present invention.
【図２】同好気槽の他の実施例を示す概略構成図であ
る。FIG. 2 is a schematic configuration diagram showing another embodiment of the aerobic tank.
【図３】従来方式による装置の概略構成図である。FIG. 3 is a schematic configuration diagram of an apparatus according to a conventional method.
１ 好気槽 ２ 嫌気槽 ３ 仕切板 ４ 担体 ５ 流入管 ６ 移送管 ７ 散気装置 ９ａ 担体流出防止板 10 固定床 11 排出管 12 循環管路 1 aerobic tank 2 anaerobic tank 3 partition plate 4 carrier 5 inflow pipe 6 transfer pipe 7 air diffuser 9a carrier outflow prevention plate 10 fixed bed 11 discharge pipe 12 circulation pipe line
───────────────────────────────────────────────────── フロントページの続き (72)発明者 広瀬 洋一郎 東京都中央区日本橋室町３−１−３ 株式 会社クボタ東京本社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yoichiro Hirose 3-1-3 Nihombashi Muromachi Chuo-ku, Tokyo Kubota Tokyo Head Office
Claims (1)
物学的に硝化処理する好気槽と、該好気槽から移送され
た被処理水を嫌気条件下で生物学的に脱窒処理する嫌気
槽とで構成されており、上記好気槽には、硝化菌を結合
固定化する担体が投入されているとともに、酸素含有ガ
スを供給しかつ槽内循環流を生起する散気装置が設けら
れ、また、嫌気槽には、脱窒菌を固定する充填材を保持
した固定床が設けられているとともに、槽内被処理水を
循環させる手段が設けられていることを特徴とする、水
処理装置。An aerobic tank that biologically nitrifies under aerobic conditions by inflowing wastewater that requires nitrogen removal, and the water to be treated transferred from the aerobic tank under biological conditions under anaerobic conditions. It is composed of an anaerobic tank for nitrification, and the aerobic tank is charged with a carrier that binds and immobilizes nitrifying bacteria, and also supplies oxygen-containing gas and creates diffused air in the tank. A device is provided, and the anaerobic tank is provided with a fixed bed holding a packing material for fixing denitrifying bacteria, and means for circulating the treated water in the tank. , Water treatment equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8198995A JP3246262B2 (en) | 1995-03-14 | 1995-03-14 | Water treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8198995A JP3246262B2 (en) | 1995-03-14 | 1995-03-14 | Water treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08243586A true JPH08243586A (en) | 1996-09-24 |
| JP3246262B2 JP3246262B2 (en) | 2002-01-15 |
Family
ID=13761891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8198995A Expired - Fee Related JP3246262B2 (en) | 1995-03-14 | 1995-03-14 | Water treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3246262B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001259684A (en) * | 2000-03-21 | 2001-09-25 | Fuji Clean Kogyo Kk | Sewage treating device and treating method |
| CN105347629A (en) * | 2015-12-11 | 2016-02-24 | 广西南宁绿泽环保科技有限公司 | Multistage compound moving bed biofilm reactor (MC-MBBR) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016087549A (en) * | 2014-11-05 | 2016-05-23 | 株式会社Ihi | Denitrification apparatus |
-
1995
- 1995-03-14 JP JP8198995A patent/JP3246262B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001259684A (en) * | 2000-03-21 | 2001-09-25 | Fuji Clean Kogyo Kk | Sewage treating device and treating method |
| CN105347629A (en) * | 2015-12-11 | 2016-02-24 | 广西南宁绿泽环保科技有限公司 | Multistage compound moving bed biofilm reactor (MC-MBBR) |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3246262B2 (en) | 2002-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4125941B2 (en) | Waste water treatment apparatus and waste water treatment method using the same | |
| JP3451849B2 (en) | Wastewater treatment method and apparatus | |
| JPS60187396A (en) | Apparatus for biologically removing nitrogen in waste water | |
| JP3246262B2 (en) | Water treatment equipment | |
| JP2609192B2 (en) | Biological dephosphorization nitrification denitrification treatment method of organic wastewater | |
| JP3221168B2 (en) | Wastewater nitrogen removal method and apparatus | |
| JP3677783B2 (en) | Nitrification method | |
| JP3973069B2 (en) | Organic wastewater treatment method and apparatus | |
| JP3555812B2 (en) | Advanced treatment method for organic wastewater | |
| JP3136901B2 (en) | Wastewater treatment method | |
| JPH1094796A (en) | Treatment of waste water and device therefor | |
| JP3346690B2 (en) | Method for removing nitrogen and phosphorus from organic wastewater | |
| JP3407342B2 (en) | Biological denitrification / phosphorus removal equipment | |
| JPS60129194A (en) | Treatment of sewage | |
| JPS6138693A (en) | Continuous process for treating filthy water by intermittent aeration and continuous treating apparatus for treating filthy water | |
| JPH027716B2 (en) | ||
| JP2984579B2 (en) | Biological reaction tank | |
| JPH11239798A (en) | Method and device for removing nitrogen in organic material-containing water | |
| JP2874125B2 (en) | Nitrogen removal equipment | |
| JPS62225296A (en) | Biological nitrification and denitrification device | |
| JPH0975987A (en) | Method for removing nitrogen in high level from organic sewage | |
| JPH07115031B2 (en) | Nitrification and denitrification method of organic wastewater | |
| JP2874124B2 (en) | Nitrogen removal equipment | |
| JPH0884998A (en) | Organic sewage treatment device | |
| JPH0985285A (en) | High-degree removal of nitrogen in organic sewage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081102 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081102 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091102 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091102 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101102 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101102 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111102 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111102 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121102 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121102 Year of fee payment: 11 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313113 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121102 Year of fee payment: 11 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131102 Year of fee payment: 12 |
|
| LAPS | Cancellation because of no payment of annual fees |