JP2002205087A - Air diffuser - Google Patents
Air diffuserInfo
- Publication number
- JP2002205087A JP2002205087A JP2001000891A JP2001000891A JP2002205087A JP 2002205087 A JP2002205087 A JP 2002205087A JP 2001000891 A JP2001000891 A JP 2001000891A JP 2001000891 A JP2001000891 A JP 2001000891A JP 2002205087 A JP2002205087 A JP 2002205087A
- Authority
- JP
- Japan
- Prior art keywords
- dissolving
- section
- reaction
- tank
- air
- 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
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
- Separation Using Semi-Permeable Membranes (AREA)
- Activated Sludge Processes (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、散気設備に関し、
水処理設備において活性汚泥に酸素を供給する技術に係
るものである。TECHNICAL FIELD The present invention relates to an air diffuser,
The present invention relates to a technique for supplying oxygen to activated sludge in a water treatment facility.
【0002】[0002]
【従来の技術】従来、活性汚泥法の一つである膜分離活
性汚泥法においては、曝気槽内に浸漬した膜分離装置の
下方に散気装置を配置し、散気装置から散気する空気に
よって曝気槽内の活性汚泥を含む槽内混合液を曝気して
おり、散気した空気の上昇によって生じる固気液混相の
上向流によって膜分離装置の膜面を洗浄している。2. Description of the Related Art Conventionally, in a membrane separation activated sludge method, which is one of the activated sludge methods, an air diffuser is disposed below a membrane separator immersed in an aeration tank, and air diffused from the air diffuser is provided. The mixed liquid in the tank including the activated sludge in the aeration tank is aerated, and the membrane surface of the membrane separation device is washed by the upward flow of the solid-gas-liquid mixed phase generated by the rise of the diffused air.
【0003】膜分離活性汚泥法で生物処理に必要な酸素
は、活性汚泥への酸素溶解効率をもとに設定された曝気
空気量を所定の曝気ブロアで供給することで確保してい
る。この酸素溶解効率を高くすることは曝気ブロアのダ
ウンサイズ、曝気時間の縮小による省電力化となり望ま
しいことである。[0003] Oxygen required for biological treatment in the membrane separation activated sludge method is secured by supplying a predetermined amount of aerated air based on the efficiency of dissolving oxygen in activated sludge with a predetermined aerated blower. Increasing the oxygen dissolving efficiency is desirable because it reduces power consumption by downsizing the aeration blower and shortening the aeration time.
【0004】このために、散気管の空気噴出口の口径を
小さくし、微細な空気の気泡を発生させたり、あるいは
機械攪拌装置を併設して強力な水流によって散気管から
散気した空気の気泡を細かくする分散している。[0004] For this purpose, the diameter of the air outlet of the diffuser tube is reduced to generate fine air bubbles, or air bubbles diffused from the diffuser tube by a strong water flow provided with a mechanical stirring device. It is finely distributed.
【0005】[0005]
【発明が解決しようとする課題】しかし、機械攪拌装置
によって気泡を細かくするには、機械攪拌装置を駆動す
るための動力を必要とし、動力効率の面から実用的な気
泡のサイズには限界がある。また、散気管の空気噴出口
の口径を小さくすると、散気停止時に散気管に逆流入す
る水中の不純物質によって空気噴出口が閉塞することが
起こり易くなり、散気管における開口度が低下して一部
の空気噴出口から集中して空気が噴出し、その箇所にお
ける気泡が大きくなる。さらに、活性汚泥中では水と気
体との界面を通じて溶解現象が起るが、そこに汚泥が介
在すると汚泥が水と気体の接触を阻害し、汚泥の性質に
よっては酸素溶解効率が大きく低下した。However, in order to reduce air bubbles by a mechanical stirrer, power for driving the mechanical stirrer is required, and a practical bubble size is limited in terms of power efficiency. is there. Also, when the diameter of the air outlet of the air diffuser is reduced, the air outlet is likely to be blocked by impurities in water flowing backward into the air diffuser when the air diffusion is stopped, and the opening degree in the air diffuser is reduced. Air is intensively ejected from some of the air ejection ports, and the air bubbles at that location increase. Furthermore, in the activated sludge, the dissolution phenomenon occurs through the interface between water and gas. When the sludge intervenes therein, the sludge inhibits the contact between water and gas, and the oxygen dissolving efficiency is greatly reduced depending on the properties of the sludge.
【0006】本発明は上記した課題を解決するものであ
り、汚泥の悪影響を排除し、細かな気泡を長時間にわた
って槽内に滞留させ、酸素溶解効率を高めることができ
る散気設備を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides an aeration apparatus capable of eliminating adverse effects of sludge, retaining fine air bubbles in a tank for a long time, and improving oxygen dissolving efficiency. The purpose is to:
【0007】[0007]
【課題を解決するための手段】上記課題を解決するため
に、請求項1に係る本発明の散気設備は、槽内に溶解部
と分離手段を介して溶解部に連通する反応部とを設け、
溶解部に散気管を配置し、基端側が溶解部に連通して先
端側が反応部に連通する循環系を設け、循環系の先端側
が反応部の槽底面に沿う方向に向けて、もしくは反応部
の槽底面に対して所定角度を有する方向に向けて開口す
るものである。In order to solve the above-mentioned problems, an aeration apparatus of the present invention according to claim 1 includes a dissolving section and a reaction section communicating with the dissolving section via a separating means in a tank. Provided,
A diffuser tube is arranged in the dissolving part, and a circulation system is provided in which the base end communicates with the dissolving part and the distal end communicates with the reaction part, and the distal end of the circulation system is directed toward the direction along the tank bottom of the reaction part or the reaction part. It opens in a direction having a predetermined angle with respect to the bottom of the tank.
【0008】上記した構成において、分離手段はスクリ
ーン、不織布、膜等からなり、この分離手段を通して反
応部の槽内混合液を溶解部に供給することで、反応部に
おける活性汚泥および汚泥中の異物が溶解部へ流入する
ことを抑制し、溶解部における槽内混合液の汚泥性状を
異物を含まないものに改質するとともに低い汚泥濃度に
維持する。In the above construction, the separating means comprises a screen, a nonwoven fabric, a membrane, etc., and the mixed liquid in the tank of the reaction section is supplied to the dissolving section through the separation means, so that the activated sludge in the reaction section and foreign substances in the sludge are supplied. Is prevented from flowing into the dissolving section, the sludge properties of the mixed solution in the tank in the dissolving section are modified to those containing no foreign matter, and the sludge concentration is maintained at a low level.
【0009】溶解部の槽内混合液は汚泥濃度が低く、散
気管の空気噴出口を閉塞するような異物がないので、散
気管の空気噴出口の口径を小さくして空気を微小な気泡
として散気する状態を長期にわたって継続することがで
き、散気する空気を微小な気泡とすることで酸素溶解効
率を高めることができるとともに、水と気体との界面を
通じた溶解現象を阻害する汚泥が少ないので酸素溶解効
率が高くなる。The liquid mixture in the tank in the dissolving section has a low sludge concentration and does not have any foreign matter that may block the air outlet of the diffuser tube. Spraying can be continued for a long period of time, and the oxygen dissolving efficiency can be increased by making the air to be diffused into minute bubbles, and sludge that inhibits the dissolving phenomenon through the interface between water and gas is generated. Since it is small, the oxygen dissolving efficiency increases.
【0010】槽内混合液は循環系を通して溶解部から反
応部へ循環して十分な溶存酸素の下で生物反応により処
理される。このとき、循環系の先端側の開口から反応部
へ噴出する槽内混合液が反応部の槽底面に沿って、もし
くは反応部の槽底面に対して所定角度で噴出すること
で、反応部内に循環流が発生して槽内混合液が攪拌され
る。[0010] The mixed solution in the tank is circulated from the dissolving section to the reaction section through a circulating system, and is treated by a biological reaction under sufficient dissolved oxygen. At this time, the mixed solution in the tank that jets out to the reaction section from the opening on the tip side of the circulation system jets along the tank bottom of the reaction section or at a predetermined angle with respect to the tank bottom of the reaction section, thereby entering the reaction section. A circulating flow is generated and the liquid mixture in the tank is stirred.
【0011】請求項2に係る本発明の散気設備は、槽内
に溶解部と分離手段を介して溶解部に連通する反応部と
を設け、溶解部に散気管を配置し、基端側が溶解部に連
通して先端側が反応部に連通する循環系を設け、循環系
の先端側が分離手段の膜面に沿った方向に向けて開口す
るものである。According to a second aspect of the present invention, there is provided a diffuser according to the present invention, wherein a dissolving section and a reaction section communicating with the dissolving section via separation means are provided in a tank, and an air diffusing tube is disposed in the dissolving section. A circulating system is provided that communicates with the dissolving section and the leading end communicates with the reaction section, and the leading end of the circulating system opens in a direction along the membrane surface of the separation means.
【0012】上記した構成により、循環系の先端側の開
口から反応部へ噴出する溶解部の槽内混合液が分離手段
の膜面に沿って掃流となって流れ、分離手段の膜面を洗
浄する。しかも溶解部の槽内混合液は汚泥濃度が低く、
異物を含まないので高い洗浄効果が得られる。According to the above-described structure, the mixed solution in the tank in the dissolving section which jets out from the opening on the tip side of the circulation system to the reaction section flows as a sweep along the membrane surface of the separation means, and flows along the membrane surface of the separation means. Wash. Moreover, the mixed liquid in the tank in the dissolving section has a low sludge concentration,
Since no foreign matter is contained, a high cleaning effect can be obtained.
【0013】請求項3に係る本発明の散気設備は、槽内
に溶解部と分離手段を介して溶解部に連通する反応部と
を設け、溶解部に散気管を配置し、基端側が溶解部に連
通して先端側が反応部に連通する循環系を設け、反応部
に散気管を配置したものである。According to a third aspect of the present invention, there is provided a diffuser according to the present invention, wherein a dissolving unit and a reaction unit communicating with the dissolving unit via separation means are provided in the tank, and an air diffuser is disposed in the dissolving unit. A circulation system is provided in communication with the dissolving section, the leading end side communicating with the reaction section, and an air diffuser is disposed in the reaction section.
【0014】上記した構成により、反応部の散気管から
噴出する空気のエアリフト作用によって発生する固気液
混相の上向流が分離手段の膜面に沿って掃流となって流
れ、分離手段の膜面を洗浄する。According to the above-described structure, the upward flow of the solid-gas-liquid mixed phase generated by the air-lifting action of the air ejected from the air diffuser of the reaction section flows as a sweep along the membrane surface of the separation means. Wash the membrane surface.
【0015】請求項4に係る本発明の散気設備は、槽内
に溶解部と分離手段を介して溶解部に連通する反応部と
を設け、溶解部に散気管を配置し、反応部に浸漬型膜分
離装置を配置し、基端側が溶解部に連通して先端側が反
応部に連通する循環系を設け、循環系の先端側が浸漬型
膜分離装置の下方位置において開口するものである。According to a fourth aspect of the present invention, there is provided a diffuser according to the present invention, wherein a dissolving unit and a reaction unit communicating with the dissolving unit via separation means are provided in the tank, and a diffusing tube is disposed in the dissolving unit. An immersion type membrane separation device is provided, a circulation system is provided in which the base end communicates with the dissolving section and the tip end communicates with the reaction section, and the tip side of the circulation system opens at a position below the immersion type membrane separation device.
【0016】上記した構成により、循環系の先端側の開
口から反応部へ噴出する溶解部の槽内混合液が浸漬型膜
分離装置の膜面に沿って掃流となって流れ、溶解部の槽
内混合液がその汚泥濃度が低く、異物を含まないので、
浸漬型膜分離装置の膜面に対して高い洗浄効果が得られ
る。According to the above-described configuration, the mixed solution in the tank in the dissolving section that jets out from the opening on the distal end side of the circulation system to the reaction section flows as a sweep along the membrane surface of the immersion type membrane separation device, and flows in the dissolving section. Since the liquid mixture in the tank has a low sludge concentration and does not contain foreign matter,
A high cleaning effect is obtained for the membrane surface of the immersion type membrane separation device.
【0017】[0017]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。図1において、槽体1の内部には
スクリーン、不織布、分離膜などからなる分離手段2で
連通する溶解部3と反応部4を形成している。Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a dissolving section 3 and a reaction section 4 which are communicated with each other by a separating means 2 composed of a screen, a nonwoven fabric, a separation membrane and the like are formed inside a tank body 1.
【0018】溶解部3(反応部4でも可能)には被処理
水を供給する流入配管5が開口し、反応部4には処理水
を取り出す流出配管6が開口しており、溶解部3にはブ
ロア7に接続した散気管8を配置している。溶解部3と
反応部4の間には循環ポンプ9を有する循環系10を設
けている。循環系10は基端側が溶解部3の底部に連通
し、反応部4に連通する先端側が槽底面に沿う方向に向
けて、もしくは反応部4の槽底面に対して所定角度を有
する方向に向けて開口している。An inflow pipe 5 for supplying water to be treated is opened in the dissolving section 3 (possibly also in the reaction section 4), and an outflow pipe 6 for taking out treated water is opened in the reaction section 4. Has an air diffuser 8 connected to a blower 7. A circulation system 10 having a circulation pump 9 is provided between the melting section 3 and the reaction section 4. The circulation system 10 has a base end communicating with the bottom of the dissolving section 3 and a distal end communicating with the reaction section 4 oriented in a direction along the tank bottom or in a direction having a predetermined angle with respect to the tank bottom of the reaction section 4. Open.
【0019】反応部4の一側には浸漬型膜分離装置11
を設けている。浸漬型膜分離装置11はろ板に有機膜を
配置してなる複数の平板型膜カートリッジ12を鉛直方
向に沿って、かつ相互に平行に配置し、平板型膜カート
リッジ12の下方にブロア13に接続した散気管14を
配置したものであり、各平板型膜カートリッジ12の透
過液流路に連通する処理水管15に吸引ポンプ16を設
けている。On one side of the reaction section 4 is a submerged membrane separation device 11.
Is provided. The immersion type membrane separation device 11 has a plurality of flat plate type membrane cartridges 12 each having an organic membrane arranged on a filter plate arranged vertically and parallel to each other, and connected to a blower 13 below the flat plate type cartridge 12. The suction pump 16 is provided in the treatment water pipe 15 which communicates with the permeated liquid flow path of each flat membrane cartridge 12.
【0020】上記した構成により、循環ポンプ9により
循環系10を通して溶解部3の槽内混合液を反応部4へ
循環することで、溶解部3の水位を反応部4の水位より
低く維持して双方の間に水頭差を発生させる。With the above configuration, the liquid mixture in the tank of the dissolving section 3 is circulated to the reaction section 4 through the circulation system 10 by the circulation pump 9, thereby maintaining the water level of the dissolving section 3 lower than the water level of the reaction section 4. Create a head difference between the two.
【0021】この状態で反応部4の槽内混合液は前記水
頭差を駆動圧力として分離手段2を通過して溶解部3へ
流入する。このとき、分離手段2が反応部4の槽内混合
液中の活性汚泥および汚泥中の異物が溶解部3へ流入す
ることを抑制するので、溶解部3における槽内混合液の
汚泥性状が異物を含まないものに改質されるとともに汚
泥濃度が低くなる。In this state, the liquid mixture in the tank of the reaction section 4 flows into the dissolving section 3 through the separation means 2 using the head difference as a driving pressure. At this time, the separation means 2 suppresses the activated sludge in the liquid mixture in the tank of the reaction section 4 and the foreign matter in the sludge from flowing into the dissolving section 3. And the sludge concentration is reduced.
【0022】溶解部3ではブロア7から供給する空気が
散気管8から噴出し、この空気で槽内混合液を曝気す
る。このとき、溶解部3の槽内混合液はその汚泥濃度が
低く異物を含まない性状であるので散気管8の空気噴出
口が閉塞する事態が生じず、空気噴出口の口径を小さく
することが可能となり、空気を微小な気泡として散気す
る状態を長期にわたって継続することができ、微小な気
泡によって酸素溶解効率が高まる。さらに、水と気体と
の界面を通じた溶解現象を阻害する汚泥が少ないので酸
素溶解効率が高まる。In the dissolving section 3, air supplied from a blower 7 is blown out from an air diffuser 8 to aerate the mixed solution in the tank. At this time, since the mixed solution in the tank of the dissolving section 3 has a low sludge concentration and does not contain foreign matter, the air outlet of the diffuser 8 does not block, and the diameter of the air outlet can be reduced. This makes it possible to continue the state in which air is diffused as minute bubbles for a long time, and the minute bubbles increase the oxygen dissolving efficiency. Further, the amount of sludge that hinders the dissolution phenomenon through the interface between water and gas is small, so that the oxygen dissolving efficiency increases.
【0023】また、溶解部3では槽底部に開口する循環
系10が槽内混合液を吸引することで、槽内混合液は上
部領域から下部領域に向けて下向流で流れる。一方、散
気管8から散気する空気が下部領域から上部領域に向け
て上昇するので、槽内混合液と曝気空気が気液向流接触
となる。このため、空気の気泡の上昇が槽内混合液の下
向流により抑制されて気泡の槽内滞留時間が長くなり、
酸素溶解効率が高まる。溶解部3で十分に酸素が溶解し
た槽内混合液は、溶解部3から循環系10を通して反応
部4へ循環し、十分な溶存酸素の下で生物反応により処
理される。In the dissolving section 3, the circulating system 10 opened at the bottom of the tank sucks the mixed liquid in the tank, so that the mixed liquid in the tank flows downward from the upper region to the lower region. On the other hand, since the air diffused from the air diffuser 8 rises from the lower region toward the upper region, the mixed liquid in the tank and the aerated air come into gas-liquid countercurrent contact. For this reason, the rise of the air bubbles is suppressed by the downward flow of the mixed liquid in the tank, and the residence time of the bubbles in the tank increases,
Oxygen dissolution efficiency increases. The mixed solution in the tank in which oxygen is sufficiently dissolved in the dissolving section 3 is circulated from the dissolving section 3 to the reaction section 4 through the circulation system 10, and is treated by a biological reaction under sufficient dissolved oxygen.
【0024】このとき、循環系10の先端側の開口から
反応部4へ噴出する槽内混合液が反応部4の槽底面に沿
って、もしくは反応部4の槽底面に対して所定角度で噴
出することで、反応部4の内部に循環流が発生して槽内
混合液が攪拌され、活性汚泥と酸素および汚濁物質との
反応効率が高まり生物反応が促進され、循環ポンプ9の
動力を無駄なく反応効率の向上に寄与させることができ
る。At this time, the mixed liquid in the tank which is ejected from the opening on the tip side of the circulation system 10 to the reaction section 4 is ejected along the tank bottom of the reaction section 4 or at a predetermined angle with respect to the tank bottom of the reaction section 4. As a result, a circulating flow is generated inside the reaction section 4 and the mixture in the tank is stirred, the reaction efficiency between the activated sludge, oxygen and pollutants is increased, the biological reaction is promoted, and the power of the circulation pump 9 is wasted. And contribute to the improvement of the reaction efficiency.
【0025】浸漬型膜分離装置11は吸引ポンプ16の
吸引圧力を駆動圧力として反応部4の槽内混合液を平板
型膜カートリッジ12でろ過し、膜透過液を処理水管1
5を通して取出す。ブロア13から供給する空気は散気
管14より噴出し、この空気のエアリフト作用によって
発生する固気液混相流の上向流で槽内混合液を平板型膜
カートリッジ12の膜面にクロスフローで供給するとと
もに、上向流が掃流として作用することで膜面を洗浄す
る。The immersion type membrane separation apparatus 11 filters the mixed solution in the tank of the reaction section 4 with the flat type membrane cartridge 12 using the suction pressure of the suction pump 16 as the driving pressure, and filters the membrane permeate into the treated water pipe 1.
Remove through 5. The air supplied from the blower 13 is blown out from the air diffuser 14, and the mixed liquid in the tank is supplied to the membrane surface of the flat membrane cartridge 12 in a cross flow by the upward flow of the solid-gas-liquid multiphase flow generated by the air lift action of the air. In addition, the upward flow acts as a scavenging flow to clean the membrane surface.
【0026】図2は本発明の他の実施の形態を示すもの
である。図2において、循環系10の先端側は反応部4
において分離手段2の膜面に沿った方向に向けて、つま
り上方に向けて開口している。FIG. 2 shows another embodiment of the present invention. In FIG. 2, the tip of the circulating system 10 is
The opening is opened in the direction along the membrane surface of the separation means 2, that is, upward.
【0027】上記した構成により、循環系10の先端側
の開口から反応部4へ噴出する溶解部3の槽内混合液が
分離手段2の膜面に沿って掃流となって流れ、分離手段
2の膜面を洗浄する。しかも溶解部3の槽内混合液は汚
泥濃度が低く、異物を含まないので高い洗浄効果が得ら
れる。With the above configuration, the mixed solution in the tank of the dissolving section 3 squirting into the reaction section 4 from the opening on the tip side of the circulation system 10 flows as a sweep along the membrane surface of the separating means 2, 2 is washed. Moreover, the mixed solution in the tank of the dissolving section 3 has a low sludge concentration and does not contain any foreign matter, so that a high cleaning effect can be obtained.
【0028】図3は本発明の他の実施の形態を示すもの
である。図3において、反応部4には分離手段2の膜面
の近傍にブロア17に接続した散気管18を配置してお
り、循環系10の先端側が浸漬型膜分離装置11の散気
管14の下方位置において開口している。FIG. 3 shows another embodiment of the present invention. In FIG. 3, an air diffuser 18 connected to a blower 17 is disposed in the reaction section 4 near the membrane surface of the separation means 2, and the tip side of the circulating system 10 is below the air diffuser 14 of the immersion type membrane separator 11. Open at the location.
【0029】上記した構成により、反応部4の散気管1
8から噴出する空気のエアリフト作用によって発生する
固気液混相の上向流が分離手段2の膜面に沿って掃流と
なって流れ、分離手段2の膜面を洗浄する。With the above configuration, the diffuser 1 of the reaction section 4
The upward flow of the solid-gas-liquid mixed phase generated by the air-lifting action of the air ejected from 8 flows as a sweep along the membrane surface of the separation means 2 to clean the membrane surface of the separation means 2.
【0030】一方、循環系10の先端側の開口から反応
部4へ噴出する溶解部3の槽内混合液が浸漬型膜分離装
置11の膜面に沿って掃流となって流れ、溶解部3の槽
内混合液がその汚泥濃度が低く、異物を含まないので、
浸漬型膜分離装置11の膜面に対して高い洗浄効果が得
られる。On the other hand, the mixed solution in the tank of the dissolving unit 3 squirting into the reaction unit 4 from the opening on the tip side of the circulation system 10 flows as a sweep along the membrane surface of the immersion type membrane separation device 11, Since the mixed liquid in the tank of 3 has low sludge concentration and does not contain foreign matter,
A high cleaning effect is obtained for the membrane surface of the immersion type membrane separation device 11.
【0031】[0031]
【発明の効果】以上のように本発明よれば、分離手段で
反応部の槽内混合液中の活性汚泥および汚泥中の異物が
溶解部へ流入することを抑制し、溶解部の槽内混合液の
汚泥性状を改質して汚泥濃度を低くすることにより、異
物による散気管の空気噴出口の噴出が生じず、散気管の
空気噴出口の口径を小さくして微小な空気の気泡を散気
する状態を長期にわたって継続することができ、微小な
気泡によって酸素溶解効率を高めることができる。さら
に、水と気体との界面を通じた溶解現象を阻害する汚泥
を排除することで酸素溶解効率を高めることができる。
溶解部において槽内混合液を下向流で流すことで散気管
から散気する空気と気液向流接触となり、空気の気泡の
上昇を下向流により抑制して気泡の槽内滞留時間を長く
し、酸素溶解効率を高めることができる。As described above, according to the present invention, activated sludge in the mixed solution in the tank of the reaction section and foreign matter in the sludge are suppressed from flowing into the melting section by the separation means, and the mixing in the tank of the melting section is suppressed. By modifying the sludge properties of the liquid to lower the sludge concentration, foreign matter does not cause the air outlet of the air diffuser to erupt, and the diameter of the air outlet of the air diffuser is reduced to diffuse fine air bubbles. The worrying state can be continued for a long time, and the oxygen dissolving efficiency can be increased by the minute bubbles. Furthermore, the oxygen dissolving efficiency can be improved by eliminating sludge that inhibits the dissolving phenomenon through the interface between water and gas.
In the dissolving section, the mixed solution in the tank is flowed in a downward flow, so that the air diffused from the air diffuser is brought into gas-liquid countercurrent contact, the rise of air bubbles is suppressed by the downward flow, and the residence time of the bubbles in the tank is reduced. By increasing the length, the oxygen dissolution efficiency can be increased.
【0032】循環系の先端側の開口から反応部へ噴出す
る槽内混合液が反応部の槽底面に沿って、もしくは反応
部の槽底面に対して所定角度で噴出して反応部の槽内混
合液を攪拌することで、活性汚泥と酸素および汚濁物質
との反応効率を高めて生物反応を促進し、循環系の動力
を無駄なく反応効率の向上に寄与させることができる。The liquid mixture in the tank spouting from the opening on the tip side of the circulation system to the reaction section is jetted along the bottom of the reaction section or at a predetermined angle to the bottom of the reaction section, and By stirring the mixture, the reaction efficiency between the activated sludge, oxygen and pollutants is increased to promote the biological reaction, and the power of the circulation system can be contributed to the improvement of the reaction efficiency without waste.
【0033】循環系の先端側の開口から反応部へ噴出す
る溶解部の槽内混合液が分離手段の膜面に沿って掃流と
なって流れ、溶解部の槽内混合液が汚泥濃度の低い異物
を含まないことで高い洗浄効果が得られる。The mixed liquid in the tank of the dissolving section which jets out from the opening on the tip side of the circulation system to the reaction section flows as a sweep along the membrane surface of the separation means, and the mixed liquid in the tank of the dissolving section has a sludge concentration. By not including low foreign matter, a high cleaning effect can be obtained.
【0034】反応部の散気管から噴出する空気のエアリ
フト作用によって発生する固気液混相の上向流が分離手
段の膜面に沿って掃流となって流れ、分離手段の膜面を
洗浄することができる。The upward flow of the solid-gas-liquid mixed phase generated by the air-lifting action of the air ejected from the air diffuser of the reaction section flows as a sweep along the membrane surface of the separation means to clean the membrane surface of the separation means. be able to.
【0035】循環系の先端側の開口から反応部へ噴出す
る溶解部の槽内混合液が浸漬型膜分離装置の膜面に沿っ
て掃流となって流れ、溶解部の槽内混合液がその汚泥濃
度が低く、異物を含まないので、浸漬型膜分離装置の膜
面に対して高い洗浄効果が得られる。The liquid mixture in the dissolving section, which jets into the reaction section from the opening on the tip side of the circulation system, flows as a sweep along the membrane surface of the immersion type membrane separation device, and the mixed liquid in the dissolving section tank flows. Since the sludge concentration is low and contains no foreign matter, a high cleaning effect can be obtained on the membrane surface of the immersion type membrane separation device.
【図1】本発明の実施の形態における散気設備を示す模
式図である。FIG. 1 is a schematic diagram illustrating an air diffuser according to an embodiment of the present invention.
【図2】本発明の他の実施の形態における散気設備を示
す模式図である。FIG. 2 is a schematic diagram showing an air diffuser according to another embodiment of the present invention.
【図3】本発明の他の実施の形態における散気設備を示
す模式図である。FIG. 3 is a schematic view showing an air diffuser according to another embodiment of the present invention.
1 槽体 2 分離手段 3 溶解部 4 反応部 5 流入配管 6 流出配管 7 ブロア 8 散気管 9 循環ポンプ 10 循環系 11 浸漬型膜分離装置 12 平板型膜カートリッジ 13 ブロア 14 散気管 15 処理水管 16 吸引ポンプ DESCRIPTION OF SYMBOLS 1 Tank body 2 Separation means 3 Melting part 4 Reaction part 5 Inflow pipe 6 Outflow pipe 7 Blower 8 Diffusion pipe 9 Circulation pump 10 Circulation system 11 Immersion type membrane separation device 12 Flat membrane cartridge 13 Blower 14 Diffusion pipe 15 Treatment water pipe 16 Suction pump
───────────────────────────────────────────────────── フロントページの続き (72)発明者 上島 達也 大阪府大阪市浪速区敷津東一丁目2番47号 株式会社クボタ内 (72)発明者 塗師 雅治 大阪府大阪市浪速区敷津東一丁目2番47号 株式会社クボタ内 Fターム(参考) 4D006 GA02 HA41 KA01 KA51 KB22 KC02 KC14 MA03 PB08 PC62 4D028 BC13 BC17 BC24 4D029 AA01 AA09 AB05 DD01 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tatsuya Uejima 2-47, Shikitsu Higashi 1-chome, Naniwa-ku, Osaka-shi, Osaka (72) Inventor Masaharu Nishi Higashi-ichi Shikitsu, Naniwa-ku, Osaka, Osaka No. 2-47 F-term in Kubota Corporation (reference) 4D006 GA02 HA41 KA01 KA51 KB22 KC02 KC14 MA03 PB08 PC62 4D028 BC13 BC17 BC24 4D029 AA01 AA09 AB05 DD01
Claims (4)
に連通する反応部とを設け、溶解部に散気管を配置し、
基端側が溶解部に連通して先端側が反応部に連通する循
環系を設け、循環系の先端側が反応部の槽底面に沿う方
向に向けて、もしくは反応部の槽底面に対して所定角度
を有する方向に向けて開口することを特徴とする散気設
備。1. A dissolving section and a reaction section communicating with the dissolving section via a separating means are provided in a tank, and an air diffuser is disposed in the dissolving section.
A circulation system is provided in which the base end communicates with the dissolving part and the distal end communicates with the reaction part, and the front end of the circulation system is directed in a direction along the tank bottom of the reaction part, or at a predetermined angle with respect to the tank bottom of the reaction part. A diffuser, characterized by opening in the direction of the air.
に連通する反応部とを設け、溶解部に散気管を配置し、
基端側が溶解部に連通して先端側が反応部に連通する循
環系を設け、循環系の先端側が分離手段の膜面に沿った
方向に向けて開口することを特徴とする散気設備。2. A dissolving section and a reaction section communicating with the dissolving section via a separation means are provided in the tank, and an air diffuser is disposed in the dissolving section.
An air diffuser, wherein a circulation system is provided in which a base end communicates with a dissolving part and a distal end communicates with a reaction part, and a distal end of the circulation system is opened in a direction along a membrane surface of the separation means.
に連通する反応部とを設け、溶解部に散気管を配置し、
基端側が溶解部に連通して先端側が反応部に連通する循
環系を設け、反応部に散気管を配置したことを特徴とす
る散気設備。3. A dissolving part and a reaction part communicating with the dissolving part via a separating means are provided in the tank, and an air diffuser is disposed in the dissolving part.
A diffuser, wherein a circulation system is provided in which a base end communicates with a dissolving part and a distal end communicates with a reaction part, and an air diffuser is disposed in the reaction part.
に連通する反応部とを設け、溶解部に散気管を配置し、
反応部に浸漬型膜分離装置を配置し、基端側が溶解部に
連通して先端側が反応部に連通する循環系を設け、循環
系の先端側が浸漬型膜分離装置の下方位置において開口
することを特徴とする散気設備。4. A dissolving part and a reaction part communicating with the dissolving part via a separating means are provided in the tank, and an air diffuser is disposed in the dissolving part.
A immersion type membrane separation device is arranged in the reaction section, a circulation system is provided in which the base side communicates with the dissolving section and the tip side communicates with the reaction section, and the tip side of the circulation system is opened at a position below the immersion type membrane separation apparatus. Aeration equipment characterized by the following.
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US7960037B2 (en) * | 2004-12-03 | 2011-06-14 | The Regents Of The University Of California | Carbon nanotube polymer composition and devices |
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