JP2008513190A - 連続的に変化する通気 - Google Patents
連続的に変化する通気 Download PDFInfo
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- JP2008513190A JP2008513190A JP2007531536A JP2007531536A JP2008513190A JP 2008513190 A JP2008513190 A JP 2008513190A JP 2007531536 A JP2007531536 A JP 2007531536A JP 2007531536 A JP2007531536 A JP 2007531536A JP 2008513190 A JP2008513190 A JP 2008513190A
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- 238000009423 ventilation Methods 0.000 title description 2
- 238000005374 membrane filtration Methods 0.000 claims abstract description 34
- 239000012528 membrane Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000009285 membrane fouling Methods 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 4
- 238000005273 aeration Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 description 5
- 230000000737 periodic effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005201 scrubbing Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/20—Accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/22—Controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/04—Hollow fibre modules comprising multiple hollow fibre assemblies
- B01D63/046—Hollow fibre modules comprising multiple hollow fibre assemblies in separate housings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/08—Prevention of membrane fouling or of concentration polarisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/18—Specific valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/26—Specific gas distributors or gas intakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2315/00—Details relating to the membrane module operation
- B01D2315/06—Submerged-type; Immersion type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/04—Backflushing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/18—Use of gases
- B01D2321/185—Aeration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/20—By influencing the flow
- B01D2321/2066—Pulsated flow
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Multiple-Way Valves (AREA)
Abstract
Description
1.処理中にガスをあまり長く止めると、この間に膜汚れが迅速に増加するので良くないことから、繰り返しの頻度は通常、非常に高い。高い繰り返し頻度は、複数のセル又は膜タンクの間で繰り返し動作し、ブロアからの全ガス流量をより一定に保つ、又はより変動させ続けるのに必要とされるバルブの消耗を増大させる。また、バルブを作動状態と停止状態の間でどのぐらい早く繰り返しできるかには、バルブの設計と、ガス流量を加速するのにかかる時間との制限によって生じる実際的な制限がある。
2.ガスが一方のセルに対して停止状態にある場合、この停止状態は、沈積物が通気装置の中に逆流し、通気装置をやがて停止させてしまう場合がある。
3.繰り返しの間の時間が長いほど、膜汚れはより増加し、沈積物はより無酸素状態になりやすくなる。
1. ガス流れは、低い、若しくはゼロの点では、非常に短い時間しかない。これは濾過システム内のスラッジの逆流の可能性を最小化する。
2. また、ガスの本質的に連続的な流れは、洗浄/こすり洗浄のサイクル期間を従来の“交互の”方法より拡大することができるということを意味している。これによって、非常に長い間、ガス流れが低い状態若しくはガス流れが無い状態にあることは無いので、スラッジが沈積し、無酸素状態が生じる可能性がほとんど無い、ということを達成することができる。
3. 処理は、ブロアの可変速式駆動装置の使用及び周期的な流れ形状のプログラミングによって使用することができ、この場合には、繰り返しのためにバルブが必要とされることが無いので、バルブに関する問題は生じない。又は代替的に、繰り返しを制御するために既存のバルブが使用される場合には、処理が可能である期間が長いということはバルブの消耗が少ないということを意味している。
4. また、処理は、好ましい実施形態で記載した回転バルブを使用することによって使用することができる。この実施形態においては、ブロアは本質的には一定の速度で運転され、バルブは連続的に回転する。バルブには突然の開閉作動は無く、1つのバルブしか必要とされない。
5. また、上述の回転バルブの使用は、バルブの回転速度を上げることによって、より短い周期を得ることを可能にする。
6. ガスの必要量が50%まで削減される。
6・・・膜
15、16、27、28・・・出口部
17・・・バルブ装置(可動式バルブ部材)
18、29・・・入り口部
19・・・ハウジング
20・・・回転式分配器
21・・・モータ(駆動装置)
25・・・ピストン
Claims (31)
- 膜を洗浄する、又はこすり洗浄するためにガスが使用されるタイプの膜濾過システムにおける膜汚れを制御する方法であって、この方法が、ガスを連続的に変化する流速で前記システムへ供給することを含むことを特徴とする方法。
- 前記システムは複数のモジュールを含み、それぞれの前記モジュールへのガスの供給は連続的に変化する流速を有していることを特徴とする請求項1に記載の方法。
- 前記連続的に変化するガスの流速は、早い流れから遅い流れまでに及ぶことを特徴とする請求項1に記載の方法。
- 遅い流れは、流量がゼロであることを特徴とする請求項3に記載の方法。
- 前記ガス流の流速パターンは、正弦波状の連続的に変化する曲線に従うことを特徴とする請求項1に記載の方法。
- 前記ガス流の流速のパターンは、三角波状の連続的に変化する曲線に従うことを特徴とする請求項1に記載の方法。
- 1つ以上の膜と、膜の表面をこすり洗浄する泡を形成するためのガス流れを提供するガス源とを含む膜濾過システムであって、前記ガス源は、前記ガス流れを連続的に変化する流速で提供していることを特徴とする膜濾過システム。
- 前記ガス源からの前記ガスの流量は、連続的に変化することを特徴とする請求項7に記載の膜濾過システム。
- 前記ガス源は、速度可変のブロアであることを特徴とする請求項8に記載の膜濾過システム。
- 前記ガス源は、流れ制御装置を介して前記濾過システムに取り付けられ、前記流れ制御装置は流量を連続的に変化させることを特徴とする請求項7に記載の膜濾過システム。
- 前記膜濾過システムは多数の膜モジュールを含み、前記流れ制御装置は、関連するモジュールに接続された別々の出口部を有し、流量が1つのモジュール又は複数のモジュールに対して増加するときに、別の1つのモジュール又は複数のモジュールに対する流量は減少することを特徴とする請求項10に記載の膜濾過システム。
- 前記膜濾過システムは、複数のモジュールのセットを含み、それぞれのモジュールのセットへのガス流れは、連続的に変化する流速を有していることを特徴とする請求項10に記載の膜濾過システム。
- 前記膜濾過システムは複数の供給液含有容器を含み、それぞれの供給液含有容器は、中に配置されたそれぞれのモジュールのセットを有することを特徴とする請求項12に記載の膜濾過システム。
- 前記流れ制御装置は、1つの入り口部及び1つ以上の出口部を有するハウジングと、前記入り口部から前記1つ以上の出口部へ連続的に変化する流れを提供するための可動式バルブ部材とを有していることを特徴とする請求項10に記載の膜濾過システム。
- 前記可動式バルブ部材は、前記ハウジングの中に配置された回転式分配器であり、前記入り口部から前記1つ以上の出口部への流れを制御することを特徴とする請求項14に記載の膜濾過システム。
- 前記出口部は前記回転式分配器に対して配置され、前記出口部のうちの1つは、他の前記出口部が完全に閉じられたときに、全開であることを特徴とする請求項15に記載の膜濾過システム。
- 前記可動式バルブ部材は、前記ハウジング内に配置された往復式分配器であり、前記入り口部から前記1つ以上の出口部への流れを制御することを特徴とする請求項14に記載の膜濾過システム。
- 前記出口部は、前記往復式分配器に対して配置され、前記出口部のうちの1つは、他の前記出口部が完全に閉じられたときに、全開であることを特徴とする請求項17に記載の膜濾過システム。
- 前記往復式分配器は、前記ハウジングに滑動可能に取り付けられたピストンを含み、前記ハウジングは筒状であり、前記出口部は両端部に配置され、前記入り口部は、前記ハウジングの壁部の前記両端部の中間に配置されていることを特徴とする請求項17又は18に記載の膜濾過システム。
- 前記ピストンは、前記ピストンがその限界の間で動くときに、前記入り口部から前記出口部のうちの1つへの流れが増加し、他の前記出口部への流れが減少するように配置されていることを特徴とする請求項19に記載の膜濾過システム。
- 前記可動式バルブ部材は、駆動装置によって連続的に駆動されていることを特徴とする請求項14に記載の膜濾過システム。
- 前記ハウジングは、複数の入り口部を有することを特徴とする請求項14に記載の膜濾過システム。
- 膜濾過システムにおける通気ガスの流量の制御に使用するための流れ制御装置であって、前記流れ制御装置は、1つの入り口部及び1つ以上の出口部を有するハウジングと、前記入り口部から前記1つ以上の出口部へ連続的に変化する流れを提供するための可動式バルブ部材とを含んでいることを特徴とする流れ制御装置。
- 前記可動式バルブ部材は、前記ハウジング内に配置された回転式分配器であり、前記入り口部から前記1つ以上の出口部への流れを制御していることを特徴とする請求項23に記載の流れ制御装置。
- 前記出口部は前記回転式分配器に対して配置され、前記出口部のうちの1つは、他の前記出口部が完全に閉じられたときに、全開であることを特徴とする請求項24に記載の流れ制御装置。
- 前記可動式バルブ部材は、前記ハウジング内に配置された往復式分配器であり、前記入り口部から前記1つ以上の出口部への流れを制御していることを特徴とする請求項23に記載の流れ制御装置。
- 前記出口部は前記回転式分配器に対して配置され、前記出口部のうちの1つは、他の前記出口部が完全に閉じられたときに、全開であることを特徴とする請求項26に記載の流れ制御装置。
- 前記往復式分配器は、前記ハウジングに滑動可能に取り付けられたピストンを含み、前記ハウジングは筒状であり、前記出口部は両端部に配置され、前記入り口部は、前記ハウジングの壁部の前記両端部の中間に配置されていることを特徴とする請求項26又は27に記載の膜濾過システム。
- 前記ピストンは、前記ピストンがその限界の間で動くときに、前記入り口部から前記出口部のうちの1つへの流れが増加し、他の前記出口部への流れが減少するように配置されていることを特徴とする請求項19に記載の膜濾過システム。
- 前記可動式バルブ部材は、駆動装置によって連続的に駆動されていることを特徴とする請求項23に記載の流れ制御装置。
- 前記ハウジングは、複数の入り口部を有することを特徴とする請求項23に記載の流れ制御装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2004905317 | 2004-09-15 | ||
AU2004905317A AU2004905317A0 (en) | 2004-09-15 | Continuously variable aeration | |
PCT/AU2005/001405 WO2006029465A1 (en) | 2004-09-15 | 2005-09-15 | Continuously variable aeration |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008513190A true JP2008513190A (ja) | 2008-05-01 |
JP4954880B2 JP4954880B2 (ja) | 2012-06-20 |
Family
ID=36059637
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007531536A Expired - Fee Related JP4954880B2 (ja) | 2004-09-15 | 2005-09-15 | 連続的に変化する通気 |
Country Status (7)
Country | Link |
---|---|
US (1) | US8377305B2 (ja) |
EP (1) | EP1807181A4 (ja) |
JP (1) | JP4954880B2 (ja) |
CN (1) | CN100548452C (ja) |
CA (1) | CA2579894A1 (ja) |
NZ (1) | NZ553771A (ja) |
WO (1) | WO2006029465A1 (ja) |
Cited By (1)
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WO2013002242A1 (ja) * | 2011-06-29 | 2013-01-03 | 東レ株式会社 | 膜分離活性汚泥法の膜面洗浄方法 |
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- 2005-09-15 JP JP2007531536A patent/JP4954880B2/ja not_active Expired - Fee Related
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Also Published As
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EP1807181A1 (en) | 2007-07-18 |
WO2006029465A1 (en) | 2006-03-23 |
EP1807181A4 (en) | 2009-04-22 |
NZ553771A (en) | 2010-11-26 |
JP4954880B2 (ja) | 2012-06-20 |
CN101039740A (zh) | 2007-09-19 |
US20080156745A1 (en) | 2008-07-03 |
CA2579894A1 (en) | 2006-03-23 |
US8377305B2 (en) | 2013-02-19 |
CN100548452C (zh) | 2009-10-14 |
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