WO2010021959A1 - Improved membrane system backwash energy efficiency - Google Patents

Improved membrane system backwash energy efficiency Download PDF

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Publication number
WO2010021959A1
WO2010021959A1 PCT/US2009/053979 US2009053979W WO2010021959A1 WO 2010021959 A1 WO2010021959 A1 WO 2010021959A1 US 2009053979 W US2009053979 W US 2009053979W WO 2010021959 A1 WO2010021959 A1 WO 2010021959A1
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WIPO (PCT)
Prior art keywords
membrane
permeable hollow
hollow membrane
permeate
value
Prior art date
Application number
PCT/US2009/053979
Other languages
French (fr)
Inventor
Fufang Zha
Zhiyi Cao
Original Assignee
Siemens Water Technologies Corp.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from AU2008904279A external-priority patent/AU2008904279A0/en
Application filed by Siemens Water Technologies Corp. filed Critical Siemens Water Technologies Corp.
Priority to US13/059,283 priority Critical patent/US8652331B2/en
Priority to CA2734796A priority patent/CA2734796A1/en
Priority to AU2009282912A priority patent/AU2009282912B2/en
Priority to JP2011523903A priority patent/JP2012500117A/en
Priority to NZ591259A priority patent/NZ591259A/en
Priority to CN2009801324397A priority patent/CN102123784A/en
Priority to EP09808651.5A priority patent/EP2315625B1/en
Publication of WO2010021959A1 publication Critical patent/WO2010021959A1/en

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Classifications

    • 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
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • 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
    • 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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/16—Regeneration of sorbents, filters

Definitions

  • the present invention relates to membrane filtration systems and more particularly to improved methods and apparatus for cleaning the membranes used in such systems.
  • Membrane cleaning is a key step to the success of any ongoing membrane filtration process. Without regular cleaning the membranes become clogged with impurities and decrease in efficiency until they are eventually rendered inoperative. Different physical membrane cleaning strategies have been proposed and published. A summary of some typical methods is described below.
  • Backwash or back pulsing method uses a reversed flow of fluid (relative to the filtration flow direction) through the membrane pores to dislodge fouling materials therefrom. Either gas or liquid or a combination thereof can be used as a fluid in the reverse backwash.
  • Bartels et al describe a backwash technique where the hollow fibre membranes are pressurized with a gas on a feed side at a specified time during the backwash. They describe the periodic use of such backwashes to effectively remove fouling components from the hollow fibre membranes.
  • a liquid pump and a liquid holding tank are required.
  • the pump delivers a permeate flow in a reverse direction to the normal filtration flow through the membrane pores to clean accumulated solids and impurities from the membranes pores.
  • a gas pushed liquid backwash is generally achieved by sending compressed gas, typically air, to the lumen side of a hollow fibre membrane and pushing the filtrate remaining in the lumen at the end of a filtration cycle to shell or feed side of membrane wall.
  • the backwash air pressure is typically set to more than 150 kPa. It is desirable to keep the air pressure required to a minimum in order to reduce the cost and energy requirements for production of the pressurised air.
  • the invention provides a method of backwashing a membrane filtration system comprising at least one permeable hollow membrane, the method comprising the step of applying a pressurised gas at a variable pressure to permeate remaining present in the system when filtration process is stopped or suspended to provide liquid for backwashing pores of the permeable hollow membrane during a backwashing process.
  • the invention provides a method of filtering solids from a liquid suspension comprising the steps of:
  • the invention provides a method of filtering solids from a liquid suspension in a filtration system comprising: (i) providing a pressure differential across a wall of a permeable hollow membrane having a liquid suspension applied to a lumen surface of the permeable hollow membrane to induce and sustain filtration through the wall of the permeable hollow membrane wherein: (a) at least part of the liquid suspension passes through the wall of the permeable hollow membrane to be drawn off as permeate from an outer surface of the permeable hollow membrane; and
  • the gas pressure is preferably varied between a first and a second value, the first value being higher than the second value.
  • the first and second pressure values are determined on the basis of a measurable membrane characteristic such as membrane permeability or membrane filter resistance.
  • the first value gas pressure is used when membrane permeability is at or below a first predetermined value and the second value gas pressure is used when membrane permeability is at or above a second predetermined value.
  • the first value gas pressure is used when membrane resistance is at or above a first predetermined value and the second value gas pressure is used when the membrane resistance is at or below a second predetermined value.
  • the first and second predetermined values may be different values or they may be the same value.
  • the gas pressure may be continuously varied, cycled or alternated between the first and second values
  • the solids are preferably removed into bulk liquid surrounding the membranes during the backwashing step.
  • the permeable hollow membrane is preferably a permeable polymeric hollow fibre membrane.
  • a number of permeable polymeric hollow fibre membranes are bundled and potted into a module in parallel fashion.
  • the lumens of the hollow fibres are preferably in fluid communication with a filter manifold.
  • the membrane filtration system may be a single fibre, a single module, a plurality of modules or a single module within a plurality of modules.
  • a plurality of hollow fibre membrane modules is included in the filtration system.
  • the membrane filtration system is a pressurised membrane filtration system.
  • the membrane filtration system is a submerged membrane filtration system.
  • the membrane is not necessarily a hollow fibre membrane, but can be for example a flat sheet.
  • the invention also provides a method of backwashing a membrane filtration system comprising at least one permeable membrane, the method comprising the step of applying variable pressure to permeate remaining present in the system when filtration process is stopped or suspended to provide liquid for backwashing pores of the permeable membrane during a backwashing process.
  • Variable pressure may be applied by applying gas at variable pressure to the permeate or by varying pumping speed of the permeate.
  • the invention also provides a method of filtering solids from a liquid suspension comprising the steps of:
  • Variable pressure may be applied by applying gas at variable pressure to the permeate or by varying pumping speed of the permeate.
  • the invention also provides a method of backwashing a membrane filtration system comprising at least one permeable membrane, the method comprising the step of applying a pressurised gas at a variable pressure to permeate remaining present in the system when filtration process is stopped or suspended to provide liquid for backwashing pores of the permeable membrane during a backwashing process.
  • the invention also provides a method of filtering solids from a liquid suspension comprising the steps of:
  • Figure 1 shows a schematic diagram of a backwash system for a filtration system according to one embodiment of the invention.
  • FIG. 1 there is shown one embodiment of a gas pushed liquid backwash system according the invention.
  • the system comprises a filtration module 5 having hollow fibre membranes 6 supported by and extending generally vertically between upper and lower headers 7 and 8.
  • the module 5 is positioned in a pressurised feed vessel 9.
  • filtrate is withdrawn from both ends of the hollow fibres membranes 6 through upper and lower ports 10 and 11, however, it will be appreciated that, in some embodiments, filtrate may only be withdrawn from one end of the module.
  • the upper and lower headers 7 and 8 are provided with respective filtrate collection chambers 14 and 13 connected to a filtrate removal line 12 via the upper and lower ports 10 and 11, respectively.
  • the filtrate removal line 12 is controlled by valve AV2.
  • Feed liquid is supplied through feed line 15 under the control of valve AVl.
  • An upper backwash line 16 provides for depressurisation of the feed vessel 9 under control of valve AV3. Waste containing liquid is removed through waste removal line 17 under the control of valve AV4.
  • backwash gas typically air
  • PRV3 is pilot controlled gas regulator connected via gas line 18 to a source of pressurised gas 19.
  • the gas regulator PRV3 is sized to provide sufficient backwash gas flow at a maximum pressure set point.
  • the gas regulator PRV3 accepts the pressure set point set by either gas regulator valve PRVl or PRV2 via associated respective control valves SVl and SV2, and gas control line 21.
  • Gas regulator PRVl is set to a low pressure ranging from about 70-120 kPa while gas regulator valve PRV2 is set to a high pressure ranging from about 150 to 250 kPa.
  • Each gas regulator PRVl and PRV2 is connected via gas lines 22 and 23 to a source of pressurised gas 20. It will be appreciated the sources of pressurised gas 19 and 20 may be the same source.
  • PLC programmable logic controller
  • the PLC examines the measured membrane permeability and determines the backwash gas pressure required. If the membrane permeability is above a set value stored in the PLC, valve SVl is opened and pilot controlled gas regulator PRV3 is set to a lower backwash gas pressure. If the membrane permeability is below a set value stored in the PLC, valve SV2 is opened and PRV3 is set to a higher backwash gas pressure.
  • the backwash gas pressure can be any pressure between the upper and lower limits.
  • the liquid backwash can be set to alternate between high and low pressure backwash by alternating the gas pressure applied to the backwash liquid. For example, after one or several filtration cycles with low pressure backwash(es), one or several filtration cycles with high pressure backwash(es) are carried out. After the filtration cycle(s) with high pressure backwash(es) are completed, filtration cycles with low pressure backwash(es) resume.
  • the membrane filter resistance increase may be measured in the PLC and used to enable a high-pressure liquid backwash. When the filter resistance increase in a filtration cycle is higher than the preset value in the PLC, SV2 is activated during a backwash and high gas pressure is supplied to the system for a high-pressure liquid backwash.
  • filter resistances at the beginning of a filtration cycle may be recorded by the PLC or other device and compared over several filtration cycles. If the net increase of filter resistance over a predetermined number of filtration cycles is larger than a set point stored in the PLC, the system will switch to provide a high-pressure liquid backwash. Once the net increase of filter resistance drops below a set point stored in the PLC, the system switches back to a low-pressure liquid backwash.
  • the operation of a 6 x 120 module pressurized membrane plant was analysed.
  • the plant cleaning interval was set to 35 days.
  • the gas pressure for a liquid backwash was set to 100 kPa for the first 23 days of operation and 200 kPa for the last 12 days. Table 1 shows the comparison results.
  • liquid backwash involves pushing clean (usually filtered) liquid back through the pores to dislodge foulant.
  • Liquid backwashes are typically either air pushed or pumped.
  • An air pushed liquid backwash would be similar to the scheme shown in figure 1 with the exception that gas is used to force filtrate in a reverse direction.
  • the upper and lower pressures and liquid backwash pressure are controlled by the corresponding gas pressures which are controlled in turn by the PLC.
  • a pumped backwash would also be able to be used to achieve a similar result.
  • the filtrate is pumped directly back through the membrane to dislodge foulant.
  • the upper and lower pressures and liquid backwash pressure are controlled by the speed of the pumps which are controlled in turn by the PLC. The results obtained so far suggest that long term membrane performance will not be compromised by alternating the backwash pressure.
  • long intervals >30 days between cleaning in place (CIP) events can be achieved.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

A method of backwashing a membrane filtration system comprising at least one permeable membrane, preferably a hollow fibre membrane, the method comprising the step of applying a pressurised gas at a variable pressure to permeate remaining present in the system when filtration process is stopped or suspended to provide liquid for backwashing pores of the permeable membrane during a backwashing process. Also provided are methods of filtering solids from a liquid suspension using alternating liquid backwash pressures.

Description

IMPROVED MEMBRANE SYSTEM BACKWASH ENERGY EFFICIENCY
TECHNICAL FIELD
The present invention relates to membrane filtration systems and more particularly to improved methods and apparatus for cleaning the membranes used in such systems. BACKGROUND OF THE INVENTION
Membrane cleaning is a key step to the success of any ongoing membrane filtration process. Without regular cleaning the membranes become clogged with impurities and decrease in efficiency until they are eventually rendered inoperative. Different physical membrane cleaning strategies have been proposed and published. A summary of some typical methods is described below.
1. Scrubbing membranes with gas bubbles. This method was first published by Yamamoto et al. (Water Science Technology, Vol. 2, pages 43-54; 1989) and has been widely used in low-pressure filtration processes. The shear force created by gas bubbles removes fouling materials on the membrane surface, but does little to reduce the fouling within the membrane pores.
2. Backwash or back pulsing method. This method uses a reversed flow of fluid (relative to the filtration flow direction) through the membrane pores to dislodge fouling materials therefrom. Either gas or liquid or a combination thereof can be used as a fluid in the reverse backwash.
In PCT Publication WO 03/059495, Bartels et al describe a backwash technique where the hollow fibre membranes are pressurized with a gas on a feed side at a specified time during the backwash. They describe the periodic use of such backwashes to effectively remove fouling components from the hollow fibre membranes.
To carry out a liquid backwash, typically a liquid pump and a liquid holding tank are required. The pump delivers a permeate flow in a reverse direction to the normal filtration flow through the membrane pores to clean accumulated solids and impurities from the membranes pores.
In some pressurised filtration systems it has been found advantageous to use a gas pushed liquid backwash for the pressurized system which provides improved efficiency without compromising backwash performance. A gas pushed liquid backwash is generally achieved by sending compressed gas, typically air, to the lumen side of a hollow fibre membrane and pushing the filtrate remaining in the lumen at the end of a filtration cycle to shell or feed side of membrane wall. The backwash air pressure is typically set to more than 150 kPa. It is desirable to keep the air pressure required to a minimum in order to reduce the cost and energy requirements for production of the pressurised air.
Any discussion of the prior art throughout the specification should in no way be considered as an admission that such prior art is widely known or forms part of the common general knowledge in the field.
DISCLOSURE OF THE INVENTION
It is an object of the present invention to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative. According to a first aspect, the invention provides a method of backwashing a membrane filtration system comprising at least one permeable hollow membrane, the method comprising the step of applying a pressurised gas at a variable pressure to permeate remaining present in the system when filtration process is stopped or suspended to provide liquid for backwashing pores of the permeable hollow membrane during a backwashing process.
According to a second aspect, the invention provides a method of filtering solids from a liquid suspension comprising the steps of:
(i) providing a pressure differential across a wall of a permeable hollow membrane immersed in the liquid suspension, the liquid suspension being applied to an outer surface of the permeable hollow membrane to induce and sustain filtration through the wall of permeable hollow membrane wherein: (a) at least part of the liquid suspension passes through the wall of the membrane to be drawn off as permeate from a lumen of the permeable hollow membrane; and
(b) at least some of the solids are retained on or in the permeable hollow membrane or otherwise as suspended solids within the liquid surrounding the permeable hollow membrane; and
(ii) periodically backwashing membrane pores using permeate remaining within the permeable hollow membrane lumen and/or a filtrate manifold where present by applying a gas at a variable pressure below bubble point of the permeable hollow membrane to the permeate to displace at least some of the permeate within the lumen and/or filtrate manifold through pores of the permeable hollow membrane resulting in removal of the solids retained on or in the permeable hollow membrane.
According to a third aspect, the invention provides a method of filtering solids from a liquid suspension in a filtration system comprising: (i) providing a pressure differential across a wall of a permeable hollow membrane having a liquid suspension applied to a lumen surface of the permeable hollow membrane to induce and sustain filtration through the wall of the permeable hollow membrane wherein: (a) at least part of the liquid suspension passes through the wall of the permeable hollow membrane to be drawn off as permeate from an outer surface of the permeable hollow membrane; and
(b) at least some solids are retained on or in the permeable hollow membrane or otherwise as suspended solids within the permeable hollow membrane; (ii) stopping or suspending the filtration process; and
(iii) periodically backwashing pores of the permeable hollow membrane using permeate remaining in the filtration system after the suspension of the filtration process by applying a gas at a variable pressure below bubble point of the permeable hollow membrane to the permeate to displace at least some of the permeate through pores of the permeable hollow membrane resulting in removal of the solids retained on or in the permeable hollow membrane.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".
The gas pressure is preferably varied between a first and a second value, the first value being higher than the second value. For preference the first and second pressure values are determined on the basis of a measurable membrane characteristic such as membrane permeability or membrane filter resistance. Preferably, the first value gas pressure is used when membrane permeability is at or below a first predetermined value and the second value gas pressure is used when membrane permeability is at or above a second predetermined value.
Preferably, the first value gas pressure is used when membrane resistance is at or above a first predetermined value and the second value gas pressure is used when the membrane resistance is at or below a second predetermined value.
The first and second predetermined values may be different values or they may be the same value.
The gas pressure may be continuously varied, cycled or alternated between the first and second values
The solids are preferably removed into bulk liquid surrounding the membranes during the backwashing step.
The permeable hollow membrane is preferably a permeable polymeric hollow fibre membrane. Preferably, a number of permeable polymeric hollow fibre membranes are bundled and potted into a module in parallel fashion. The lumens of the hollow fibres are preferably in fluid communication with a filter manifold.
The membrane filtration system may be a single fibre, a single module, a plurality of modules or a single module within a plurality of modules.
Preferably a plurality of hollow fibre membrane modules is included in the filtration system.
In certain alternative embodiments, the membrane filtration system is a pressurised membrane filtration system.
In other alternative embodiments, the membrane filtration system is a submerged membrane filtration system. In further alternative embodiments, the membrane is not necessarily a hollow fibre membrane, but can be for example a flat sheet.
In another aspect the invention also provides a method of backwashing a membrane filtration system comprising at least one permeable membrane, the method comprising the step of applying variable pressure to permeate remaining present in the system when filtration process is stopped or suspended to provide liquid for backwashing pores of the permeable membrane during a backwashing process.
Variable pressure may be applied by applying gas at variable pressure to the permeate or by varying pumping speed of the permeate. The invention also provides a method of filtering solids from a liquid suspension comprising the steps of:
(i) providing a pressure differential across a wall of a permeable membrane having a liquid suspension being applied to a first side of the permeable membrane to induce and sustain filtration through the wall of the permeable membrane wherein: (a) at least part of the liquid suspension passes through the wall of the permeable membrane to be drawn off as permeate from a second side of the permeable membrane; and
(b) at least some of the solids are retained on or in the permeable membrane or otherwise as suspended solids within the liquid surrounding the first side of the permeable membrane; and
(ii) periodically backwashing pores of the permeable membrane using permeate remaining on the second side of the permeable membrane after he suspension of the filtration process by applying variable pressure below bubble point of the permeable membrane to the permeate to displace at least some of the permeate from the second side of the permeable membrane through pores of the permeable membrane resulting in removal of the solids retained on or in the permeable membrane.
Variable pressure may be applied by applying gas at variable pressure to the permeate or by varying pumping speed of the permeate. The invention also provides a method of backwashing a membrane filtration system comprising at least one permeable membrane, the method comprising the step of applying a pressurised gas at a variable pressure to permeate remaining present in the system when filtration process is stopped or suspended to provide liquid for backwashing pores of the permeable membrane during a backwashing process. The invention also provides a method of filtering solids from a liquid suspension comprising the steps of:
(i) providing a pressure differential across a wall of a permeable membrane having a liquid suspension being applied to a first side of the permeable membrane to induce and sustain filtration through the wall of the permeable membrane wherein: (a) at least part of the liquid suspension passes through the wall of the permeable membrane to be drawn off as permeate from a second side of the permeable membrane; and
(b) at least some of the solids are retained on or in the permeable membrane or otherwise as suspended solids within the liquid surrounding the first side of the permeable membrane; and
(ii) periodically backwashing pores of the permeable membrane using permeate remaining on the second side of the permeable membrane after he suspension of the filtration process by applying a gas at a variable pressure below bubble point of the permeable membrane to the permeate to displace at least some of the permeate from the second side of the permeable membrane through pores of the permeable membrane resulting in removal of the solids retained on or in the permeable membrane.
BRIEF DESCRIPTION OF THE DRAWING
A preferred embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawing in which Figure 1 shows a schematic diagram of a backwash system for a filtration system according to one embodiment of the invention.
PREFERRED EMBODIMENTS OF THE INVENTION
Referring to Figure 1 there is shown one embodiment of a gas pushed liquid backwash system according the invention. The system comprises a filtration module 5 having hollow fibre membranes 6 supported by and extending generally vertically between upper and lower headers 7 and 8. The module 5 is positioned in a pressurised feed vessel 9. In this embodiment filtrate is withdrawn from both ends of the hollow fibres membranes 6 through upper and lower ports 10 and 11, however, it will be appreciated that, in some embodiments, filtrate may only be withdrawn from one end of the module. The upper and lower headers 7 and 8 are provided with respective filtrate collection chambers 14 and 13 connected to a filtrate removal line 12 via the upper and lower ports 10 and 11, respectively. The filtrate removal line 12 is controlled by valve AV2. Feed liquid is supplied through feed line 15 under the control of valve AVl. An upper backwash line 16 provides for depressurisation of the feed vessel 9 under control of valve AV3. Waste containing liquid is removed through waste removal line 17 under the control of valve AV4.
As shown in Figure 1, backwash gas, typically air, is supplied through gas pressure regulator PRV3 and backwash gas control valve AV5. PRV3 is pilot controlled gas regulator connected via gas line 18 to a source of pressurised gas 19. The gas regulator PRV3 is sized to provide sufficient backwash gas flow at a maximum pressure set point. The gas regulator PRV3 accepts the pressure set point set by either gas regulator valve PRVl or PRV2 via associated respective control valves SVl and SV2, and gas control line 21. Gas regulator PRVl is set to a low pressure ranging from about 70-120 kPa while gas regulator valve PRV2 is set to a high pressure ranging from about 150 to 250 kPa. Each gas regulator PRVl and PRV2 is connected via gas lines 22 and 23 to a source of pressurised gas 20. It will be appreciated the sources of pressurised gas 19 and 20 may be the same source.
The various controllable valves employed in the system are controlled by a programmable logic controller (PLC) (not shown).
Before the liquid backwash is commenced, the PLC examines the measured membrane permeability and determines the backwash gas pressure required. If the membrane permeability is above a set value stored in the PLC, valve SVl is opened and pilot controlled gas regulator PRV3 is set to a lower backwash gas pressure. If the membrane permeability is below a set value stored in the PLC, valve SV2 is opened and PRV3 is set to a higher backwash gas pressure. The backwash gas pressure can be any pressure between the upper and lower limits.
Alternatively, to strengthen the liquid backwash performance at high membrane permeability conditions, the liquid backwash can be set to alternate between high and low pressure backwash by alternating the gas pressure applied to the backwash liquid. For example, after one or several filtration cycles with low pressure backwash(es), one or several filtration cycles with high pressure backwash(es) are carried out. After the filtration cycle(s) with high pressure backwash(es) are completed, filtration cycles with low pressure backwash(es) resume. Alternatively, the membrane filter resistance increase may be measured in the PLC and used to enable a high-pressure liquid backwash. When the filter resistance increase in a filtration cycle is higher than the preset value in the PLC, SV2 is activated during a backwash and high gas pressure is supplied to the system for a high-pressure liquid backwash.
In another operational variation, filter resistances at the beginning of a filtration cycle may be recorded by the PLC or other device and compared over several filtration cycles. If the net increase of filter resistance over a predetermined number of filtration cycles is larger than a set point stored in the PLC, the system will switch to provide a high-pressure liquid backwash. Once the net increase of filter resistance drops below a set point stored in the PLC, the system switches back to a low-pressure liquid backwash.
In the following example, the operation of a 6 x 120 module pressurized membrane plant was analysed. In this example, the plant cleaning interval was set to 35 days. The gas pressure for a liquid backwash was set to 100 kPa for the first 23 days of operation and 200 kPa for the last 12 days. Table 1 shows the comparison results.
From the comparison, it can be seen that, in this example, 21.8% of gas used for the gas pushed liquid backwash can be saved by alternating the liquid backwash pressure.
Although the present invention is specifically exemplified with respect to pressurised systems, it can be readily adapted for use in submerged systems. These are systems which involve the use of a liquid backwash rather than a gas backwash. The liquid backwash involves pushing clean (usually filtered) liquid back through the pores to dislodge foulant. Liquid backwashes are typically either air pushed or pumped. An air pushed liquid backwash would be similar to the scheme shown in figure 1 with the exception that gas is used to force filtrate in a reverse direction. The upper and lower pressures and liquid backwash pressure are controlled by the corresponding gas pressures which are controlled in turn by the PLC.
A pumped backwash would also be able to be used to achieve a similar result. In that case, the filtrate is pumped directly back through the membrane to dislodge foulant. The upper and lower pressures and liquid backwash pressure are controlled by the speed of the pumps which are controlled in turn by the PLC. The results obtained so far suggest that long term membrane performance will not be compromised by alternating the backwash pressure. By using the method of the present invention, long intervals (>30 days) between cleaning in place (CIP) events can be achieved.
It will be appreciated that further embodiments and exemplifications of the invention are possible without departing from the spirit or scope of the invention described.
TABLEl
Figure imgf000014_0001

Claims

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:-
1. A method of backwashing a membrane filtration system comprising at least one permeable hollow membrane, the method comprising the step of applying a pressurised gas at a variable pressure to permeate remaining present in the system when filtration process is stopped or suspended to provide liquid for backwashing pores of the permeable hollow membrane during a backwashing process.
2. A method of filtering solids from a liquid suspension comprising the steps of: (i) providing a pressure differential across a wall of a permeable hollow membrane immersed in the liquid suspension, the liquid suspension being applied to an outer surface of the permeable hollow membrane to induce and sustain filtration through the wall of permeable hollow membrane wherein:
(a) at least part of the liquid suspension passes through the wall of the membrane to be drawn off as permeate from a lumen of the permeable hollow membrane; and
(b) at least some of the solids are retained on or in the permeable hollow membrane or otherwise as suspended solids within the liquid surrounding the permeable hollow membrane; and (ii) periodically backwashing membrane pores using permeate remaining within the permeable hollow membrane lumen and/or a filtrate manifold where present by applying a gas at a variable pressure below bubble point of the permeable hollow membrane to the permeate to displace at least some of the permeate within the lumen and/or filtrate manifold through pores of the permeable hollow membrane resulting in removal of the solids retained on or in the permeable hollow membrane.
3. A method of filtering solids from a liquid suspension in a filtration system comprising: (i) providing a pressure differential across a wall of a permeable hollow membrane having a liquid suspension applied to a lumen surface of the permeable hollow membrane to induce and sustain filtration through the wall of the permeable hollow membrane wherein:
(a) at least part of the liquid suspension passes through the wall of the permeable hollow membrane to be drawn off as permeate from an outer surface of the permeable hollow membrane; and
(b) at least some solids are retained on or in the permeable hollow membrane or otherwise as suspended solids within the permeable hollow membrane; (ii) stopping or suspending the filtration process; and
(iii) periodically backwashing pores of the permeable hollow membrane using permeate remaining in the filtration system after the suspension of the filtration process by applying a gas at a variable pressure below bubble point of the permeable hollow membrane to the permeate to displace at least some of the permeate through pores of the permeable hollow membrane resulting in removal of the solids retained on or in the permeable hollow membrane.
4. A method according to any one of the preceding claims wherein the gas pressure is varied between a first and a second value, wherein the first value is higher than the second value.
5. A method according to claim 4 wherein the first and the second pressure values are determined using a measurable membrane characteristic.
6. A method according to claim 5 wherein the membrane characteristic is membrane permeability.
7. A method according to claim 5 wherein the membrane characteristic is membrane resistance.
8. A method according to any one of claims 4 to 7 wherein the first value gas pressure is used when membrane permeability is at or below a first predetermined value and the second value gas pressure is used when membrane permeability is at or above a second predetermined value.
9. A method according to any one of claims 4 to 7 wherein the first value gas pressure is used when membrane resistance is at or above a first predetermined value and the second value gas pressure is used when the membrane resistance is at or below a second predetermined value.
10. A method according to any one of claims 4 to 9 wherein the first predetermined value and second predetermined value are different.
11. A method according to any one of claims 4 to 9 wherein the first predetermined value and second predetermined value are the same.
12. A method according to any one of the claims 4 to 11 wherein the gas pressure is continuously varied between the first value gas pressure and the second value gas pressure.
13. A method according to any one of claims 4 to 11 wherein the gas pressure is alternated between the first value gas pressure and the second value gas pressure.
14. A method according to any one of the preceding claims wherein solids are removed into bulk liquid surrounding the membranes during the backwashing step.
15. A method according to any one of the preceding claims including a plurality of membrane modules in the filtration system.
16. A method according to any one of the preceding claims including a plurality of hollow fibre membrane modules in the filtration system.
17. A method according to any one of claims 15 to 16 wherein the membrane filtration system is a pressurised membrane filtration system.
18. A method according to any one of claims 15 to 16 wherein the membrane filtration system is a submerged membrane filtration system.
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CA2734796A CA2734796A1 (en) 2008-08-20 2009-08-17 Improved membrane system backwash energy efficiency
AU2009282912A AU2009282912B2 (en) 2008-08-20 2009-08-17 Improved membrane system backwash energy efficiency
JP2011523903A JP2012500117A (en) 2008-08-20 2009-08-17 Improving backwash energy efficiency of membrane filtration systems.
NZ591259A NZ591259A (en) 2008-08-20 2009-08-17 A hollow membrane filter backwash system using gas pressurised at at least two pressures feed from the down stream side to push water through the filter to clean it
CN2009801324397A CN102123784A (en) 2008-08-20 2009-08-17 Improved membrane system backwash energy efficiency
EP09808651.5A EP2315625B1 (en) 2008-08-20 2009-08-17 Improved membrane system backwash energy efficiency

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ305501B6 (en) * 2010-08-24 2015-11-04 Vysoká škola chemicko-technologická v Praze, Ústav chemie a technologie sacharidů Device for backward rinsing of separation membranes in a membrane module
US9333464B1 (en) 2014-10-22 2016-05-10 Koch Membrane Systems, Inc. Membrane module system with bundle enclosures and pulsed aeration and method of operation
USD779632S1 (en) 2015-08-10 2017-02-21 Koch Membrane Systems, Inc. Bundle body

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPR421501A0 (en) 2001-04-04 2001-05-03 U.S. Filter Wastewater Group, Inc. Potting method
AUPR692401A0 (en) 2001-08-09 2001-08-30 U.S. Filter Wastewater Group, Inc. Method of cleaning membrane modules
AUPS300602A0 (en) 2002-06-18 2002-07-11 U.S. Filter Wastewater Group, Inc. Methods of minimising the effect of integrity loss in hollow fibre membrane modules
JP4611982B2 (en) 2003-08-29 2011-01-12 シーメンス・ウォーター・テクノロジーズ・コーポレーション Backwash method
WO2005046849A1 (en) 2003-11-14 2005-05-26 U.S. Filter Wastewater Group, Inc. Improved module cleaning method
US8758621B2 (en) 2004-03-26 2014-06-24 Evoqua Water Technologies Llc Process and apparatus for purifying impure water using microfiltration or ultrafiltration in combination with reverse osmosis
US8790515B2 (en) 2004-09-07 2014-07-29 Evoqua Water Technologies Llc Reduction of backwash liquid waste
WO2006029456A1 (en) 2004-09-14 2006-03-23 Siemens Water Technologies Corp. Methods and apparatus for removing solids from a membrane module
CN100548452C (en) 2004-09-15 2009-10-14 西门子水技术公司 The method of incrustation in a kind of membrane filtration system and the control membrane filtration system
SG2014010789A (en) 2004-12-24 2014-06-27 Siemens Industry Inc Cleaning in membrane filtration systems
CN100546701C (en) 2004-12-24 2009-10-07 西门子水技术公司 Simple gas flushing method and device
CA2605757A1 (en) 2005-04-29 2006-11-09 Siemens Water Technologies Corp. Chemical clean for membrane filter
EP1945333B1 (en) 2005-08-22 2011-06-08 Siemens Industry, Inc. An assembly for water filtration to minimise backwash volume
US8293098B2 (en) 2006-10-24 2012-10-23 Siemens Industry, Inc. Infiltration/inflow control for membrane bioreactor
US8318028B2 (en) 2007-04-02 2012-11-27 Siemens Industry, Inc. Infiltration/inflow control for membrane bioreactor
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
CN109107392B (en) 2007-05-29 2024-11-01 杜邦特种材料新加坡私人有限公司 Membrane cleaning using pulsed stripping pump
CA2731774A1 (en) 2008-07-24 2010-01-28 Siemens Water Technologies Corp. Frame system for membrane filtration modules
AU2010101488B4 (en) 2009-06-11 2013-05-02 Evoqua Water Technologies Llc Methods for cleaning a porous polymeric membrane and a kit for cleaning a porous polymeric membrane
AU2011245709B2 (en) 2010-04-30 2015-06-11 Evoqua Water Technologies Llc Fluid flow distribution device
CN103118766B (en) 2010-09-24 2016-04-13 伊沃夸水处理技术有限责任公司 The fluid of membrane filtration system controls manifold
CA2850522C (en) 2011-09-30 2021-03-16 Evoqua Water Technologies Llc Shut-off valve for isolation of hollow fiber membrane filtration module
CA2850309C (en) 2011-09-30 2020-01-07 Evoqua Water Technologies Llc Improved manifold arrangement
DE102011056633B4 (en) * 2011-12-19 2014-02-13 Highq-Factory Gmbh Method for cleaning a filter
EP2866922B1 (en) 2012-06-28 2018-03-07 Evoqua Water Technologies LLC A potting method
AU2013231145B2 (en) 2012-09-26 2017-08-17 Evoqua Water Technologies Llc Membrane potting methods
CN104684631A (en) 2012-09-26 2015-06-03 伊沃夸水处理技术有限责任公司 Membrane securement device
KR20150059788A (en) 2012-09-27 2015-06-02 에보쿠아 워터 테크놀로지스 엘엘씨 Gas scouring apparatus for immersed membranes
CN104334254B (en) * 2013-05-08 2017-11-14 朗技术公司 The method of the impurity included in waste gas for handling ship, the ship and clean unit with washer
AU2014329869B2 (en) 2013-10-02 2018-06-14 Evoqua Water Technologies Llc A method and device for repairing a membrane filtration module
WO2015164505A1 (en) * 2014-04-22 2015-10-29 Dairy Process Systems, Inc. System for reducing product losses, product dilution, chemical dilution and water consumption in a crossflow membrane separation system
JPWO2016178378A1 (en) * 2015-05-07 2018-02-22 住友電気工業株式会社 Filtration device operating method and filtration device
AU2016294153B2 (en) 2015-07-14 2022-01-20 Evoqua Water Technologies Llc Aeration device for filtration system
US11767501B2 (en) 2016-05-09 2023-09-26 Global Algae Technology, LLC Biological and algae harvesting and cultivation systems and methods
AU2016406360B2 (en) 2016-05-09 2023-04-13 Global Algae Technology, LLC Biological and algae harvesting and cultivation systems and methods
AU2019224002B2 (en) * 2018-02-20 2025-04-03 Johnson Screens, Inc. Air burst system for cleaning submerged screen intake
RU2686199C1 (en) * 2018-09-27 2019-04-24 Общество С Ограниченной Ответственностью "Аквафор" (Ооо "Аквафор") Liquid cleaning system
KR101979939B1 (en) * 2018-10-12 2019-08-28 (주)엘에스티에스 Decentalized water supply system improving back wash efficiency of membrane

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4935143A (en) 1986-07-11 1990-06-19 Memtec Limited Cleaning of filters
US20030150807A1 (en) 2002-01-09 2003-08-14 Hydranautics Methods for improving filtration performance of hollow fiber membranes
US20060261007A1 (en) * 2003-09-19 2006-11-23 Fufang Zha Methods of cleaning membrane modules
US20070051679A1 (en) * 2004-02-27 2007-03-08 Adams Nicholas W H Water filtration using immersed membranes
WO2008025077A1 (en) 2006-08-31 2008-03-06 Siemens Water Technologies Corp. Low pressure backwash

Family Cites Families (559)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US511995A (en) 1894-01-02 Air and water purifier
US256008A (en) * 1882-04-04 Posoelain and china paste boxes
US285321A (en) * 1883-09-18 Pottery mold
US1997074A (en) 1930-01-24 1935-04-09 John Stogdell Stokes Method of and apparatus for molding synthetic resinous articles
US2080783A (en) 1932-03-09 1937-05-18 Celluloid Corp Method of molding thermoplastic materials
US2105700A (en) 1936-07-13 1938-01-18 William D Ramage Process for purification of beverages
US2843038A (en) 1954-01-06 1958-07-15 Robert O Manspeaker Bakery apparatus and method
US2926086A (en) 1957-07-30 1960-02-23 Universal Oil Prod Co Stabilization of non-distilled alcoholic beverages and the resulting product
US3068655A (en) 1959-12-01 1962-12-18 Standard Dredging Corp Mobile pneumatic breakwater
US3183191A (en) 1960-04-19 1965-05-11 Hach Chemical Co Stain and rust removing composition
NL128859C (en) 1960-09-19
US3139401A (en) 1962-01-05 1964-06-30 Hach Chemical Co Method for removing rust from water softeners
US3198636A (en) 1962-06-08 1965-08-03 Norda Essential Oil And Chemic Preservation of wine
US3191674A (en) 1963-06-18 1965-06-29 Westinghouse Electric Corp Shell-and-tube type heat exchangers
NL296139A (en) 1963-08-02
NL136034C (en) 1965-12-22
US3492698A (en) 1965-12-22 1970-02-03 Du Pont Centrifugal casting apparatus for forming a cast wall member extending transversely across an elongated bundle of substantially parallel hollow filaments of a fluid permeation separation apparatus
US3462362A (en) 1966-07-26 1969-08-19 Paul Kollsman Method of reverse osmosis
DE1642833A1 (en) 1967-03-16 1971-04-29 Yves Henderyckx Method and device for separating one or more components from a solution
US3501798A (en) 1967-04-15 1970-03-24 Ennio Carraro Electric polisher for smooth vertical walls,such as window glass
SE320270B (en) 1967-11-04 1970-02-02 Inoue Michiro
US3556305A (en) 1968-03-28 1971-01-19 Amicon Corp Composite membrane and process for making same
US3591010A (en) 1968-06-10 1971-07-06 Pall Corp Filter having a microporous layer attached thereto
US3472765A (en) 1968-06-10 1969-10-14 Dorr Oliver Inc Membrane separation in biological-reactor systems
US3625827A (en) 1968-09-27 1971-12-07 Monsanto Co Water-soluble polymer-enzyme products
US3505215A (en) 1968-10-10 1970-04-07 Desalination Systems Method of treatment of liquids by reverse osmosis
CH511629A (en) 1969-03-27 1971-08-31 Brasco Sa Device for filtering a pressurized fluid
US3700561A (en) 1969-08-11 1972-10-24 Pabst Brewing Co Recovery of enzymes
US3693406A (en) 1970-01-26 1972-09-26 Air Intake Renu Method for inspecting filters
US3708071A (en) 1970-08-05 1973-01-02 Abcor Inc Hollow fiber membrane device and method of fabricating same
US3700591A (en) 1970-09-24 1972-10-24 Us Interior Cleaning of used membrane with oxalic acid
US3654147A (en) 1971-03-16 1972-04-04 Biospherics Inc Nitrate removal from sewage
US3728256A (en) 1971-06-22 1973-04-17 Abcor Inc Crossflow capillary dialyzer
US3763055A (en) 1971-07-07 1973-10-02 Us Interior Microporous support for reverse osmosis membranes
GB1412983A (en) 1971-11-30 1975-11-05 Debell & Richardson Method of producing porous plastic materials
US3795609A (en) 1971-12-28 1974-03-05 Administrator Environmental Pr Reverse osmosis-neutralization process for treating mineral contaminated waters
US3791631A (en) 1972-02-17 1974-02-12 Mm Ind Inc Method and apparatus for making colored expanded foam articles
US3804258A (en) 1972-08-08 1974-04-16 V Okuniewski Filtering device
US3843809A (en) 1972-08-23 1974-10-22 E Luck Manufacture of alcoholic beverages
US3955998A (en) 1973-06-21 1976-05-11 Phillips Petroleum Company Aqueous gels for plugging fractures in subterranean formation and production of said aqueous gels
FR2236537B1 (en) 1973-07-11 1977-12-23 Rhone Poulenc Ind
US3876738A (en) 1973-07-18 1975-04-08 Amf Inc Process for producing microporous films and products
US3982095A (en) 1973-10-04 1976-09-21 Searle Cardio-Pulmonary Systems Inc. Respiratory humidifier
US3992301A (en) 1973-11-19 1976-11-16 Raypak, Inc. Automatic flushing system for membrane separation machines such as reverse osmosis machines
US3968192A (en) 1974-04-19 1976-07-06 The Dow Chemical Company Method of repairing leaky hollow fiber permeability separatory devices
US4105731A (en) 1975-05-02 1978-08-08 Nippon Zeon Co., Ltd. Method of embedding an end of a bundle of thread-like bodies in a molding material and controlling capillary action by said material
JPS51128880A (en) 1975-05-02 1976-11-10 Nippon Zeon Co Method of securing yarn bundle end to case
IT1040274B (en) 1975-07-30 1979-12-20 Consiglio Nazionale Ricerche PROCEDURE FOR PREPARATION OF ANISOTROPIC MEMBRANES SUPPORTED FOR REVERSE OSMOSIS BASED ON SYNTHETIC POLYAMIDES
GB1496805A (en) 1975-09-19 1978-01-05 Unilever Ltd Dithionite composition
US4105556A (en) 1976-02-18 1978-08-08 Combustion Engineering, Inc. Liquid waste processing system
US4192750A (en) 1976-08-09 1980-03-11 Massey-Ferguson Inc. Stackable filter head unit
US4247498A (en) 1976-08-30 1981-01-27 Akzona Incorporated Methods for making microporous products
US4107043A (en) 1977-03-03 1978-08-15 Creative Dispensing Systems, Inc. Inlet conduit fluid filter
US4203848A (en) 1977-05-25 1980-05-20 Millipore Corporation Processes of making a porous membrane material from polyvinylidene fluoride, and products
US4138460A (en) 1977-06-10 1979-02-06 Cordis Dow Corp. Method for forming tubesheets on hollow fiber tows and forming hollow fiber bundle assemblies containing same
US4519909A (en) 1977-07-11 1985-05-28 Akzona Incorporated Microporous products
JPS6025194B2 (en) 1977-08-04 1985-06-17 株式会社クラレ centrifugal gluing device
US4157899A (en) 1977-10-11 1979-06-12 Cea Carter-Day Company Pulsed backflush air filter
US4183890A (en) 1977-11-30 1980-01-15 Monsanto Company Method of cutting hollow filaments embedded in resinous mass
US4204961A (en) 1978-03-15 1980-05-27 Cusato John Jr Filter apparatus with cleaning function
US4193780A (en) 1978-03-20 1980-03-18 Industrial Air, Inc. Air filter construction
US4227295A (en) 1978-07-27 1980-10-14 Baxter Travenol Laboratories, Inc. Method of potting the ends of a bundle of hollow fibers positioned in a casing
FR2420548A1 (en) 1978-03-25 1979-10-19 Akzo Nv POLYURETHANES COATING MASS, ITS PREPARATION PROCESS AND ITS USE
DK170416B1 (en) 1978-05-15 1995-08-28 Pall Corp Microporous, hydrophilic, membrane-free, alcohol-insoluble polyamide resin membrane, process for its preparation, use of the membrane in filter elements, and resin molding solution for use in the process
US4315819A (en) 1978-06-12 1982-02-16 Monsanto Company Hollow fiber permeator apparatus
JPS5535910A (en) 1978-09-06 1980-03-13 Teijin Ltd Permselectivity composite membrane and preparation thereof
US4190419A (en) 1978-09-22 1980-02-26 Miles Laboratories, Inc. Device for detecting serum bilirubin
DE7829409U1 (en) 1978-10-02 1986-07-31 Akzo Gmbh, 5600 Wuppertal Dialysis membrane hollow thread with a larger exchange surface
US4188817A (en) 1978-10-04 1980-02-19 Standard Oil Company (Indiana) Method for detecting membrane leakage
JPS5554004A (en) 1978-10-18 1980-04-21 Teijin Ltd Selective permeable membrane and its manufacturing
US4367139A (en) 1978-11-16 1983-01-04 Monsanto Company Hollow fiber permeator
BE874961A (en) 1979-03-20 1979-09-20 Studiecentrum Kernenergi PROCESS FOR PREPARING A MEMBRANE, THEREFORE PREPARED MEMBRANE, ELECTROCHEMICAL CELL WITH SUCH MEMBRANE AND USING SUCH ELECTROchemical cell
US4243525A (en) 1979-03-29 1981-01-06 Fmc Corporation Method for reducing the formation of trihalomethanes in drinking water
DE2915730C2 (en) 1979-04-19 1987-04-23 Kronsbein, Dirk-Gustav, 4000 Düsseldorf Cartridge filter
US4218324A (en) 1979-05-03 1980-08-19 Textron, Inc. Filter element having removable filter media member
US4226921A (en) 1979-07-16 1980-10-07 The Dow Chemical Company Selective plugging of broken fibers in tubesheet-hollow fiber assemblies
US4248648A (en) 1979-07-18 1981-02-03 Baxter Travenol Laboratories, Inc. Method of repairing leaks in a hollow capillary fiber diffusion device
US4271026A (en) 1979-10-09 1981-06-02 Air Products And Chemicals, Inc. Control of activated sludge wastewater treating process for enhanced phosphorous removal
CA1115433A (en) 1979-10-26 1981-12-29 David C.I. Pollock Method for protecting a bioreactor pressurized head tank against extreme surges of influent waste water
US4367140A (en) 1979-11-05 1983-01-04 Sykes Ocean Water Ltd. Reverse osmosis liquid purification apparatus
JPS5695304A (en) 1979-12-28 1981-08-01 Teijin Ltd Perm selective composite membrane and its production
US4323453A (en) 1980-01-03 1982-04-06 Monsanto Company Tube sheets for permeators
US4629563B1 (en) 1980-03-14 1997-06-03 Memtec North America Asymmetric membranes
US4369605A (en) 1980-07-11 1983-01-25 Monsanto Company Methods for preparing tube sheets for permeators having hollow fiber membranes
JPS5735907A (en) 1980-07-15 1982-02-26 Toyobo Co Ltd Fluid separating element
DE3026718A1 (en) 1980-07-15 1982-02-04 Akzo Gmbh, 5600 Wuppertal HOLLOW FIBER MEMBRANE FOR PLASMA SEPARATION
US4889620A (en) 1980-09-29 1989-12-26 Water Pollution Control Corporation In place gas cleaning of diffusion elements
JPS5770144A (en) 1980-10-17 1982-04-30 Asahi Glass Co Ltd Organic solution of fluorinated copolymer containing carboxyl group
US4384474A (en) 1980-10-30 1983-05-24 Amf Incorporated Method and apparatus for testing and using membrane filters in an on site of use housing
US4389363A (en) 1980-11-03 1983-06-21 Baxter Travenol Laboratories, Inc. Method of potting microporous hollow fiber bundles
JPS57102202A (en) 1980-12-18 1982-06-25 Toyobo Co Ltd Fluid separator
US4496470A (en) 1981-01-12 1985-01-29 The B. F. Goodrich Company Cleaning composition
US4545862A (en) 1981-03-17 1985-10-08 W. L. Gore & Associates, Inc. Desalination device and process
JPS6059933B2 (en) 1981-05-22 1985-12-27 工業技術院長 Polymer membrane with maleic anhydride residues
US4371427A (en) 1981-06-16 1983-02-01 Phillips Petroleum Company Extractive distillation
US4702840A (en) 1982-02-05 1987-10-27 Pall Corporation Charge modified polyamide membrane
US4707266A (en) 1982-02-05 1987-11-17 Pall Corporation Polyamide membrane with controlled surface properties
US4405688A (en) 1982-02-18 1983-09-20 Celanese Corporation Microporous hollow fiber and process and apparatus for preparing such fiber
US4415452A (en) 1982-03-18 1983-11-15 Heil Richard W Method and apparatus for treating organic wastewater
US4812235A (en) 1982-03-29 1989-03-14 Hr Textron, Inc. Filter element assembly replaceable mesh pack
US4540490A (en) 1982-04-23 1985-09-10 Jgc Corporation Apparatus for filtration of a suspension
US4431545A (en) 1982-05-07 1984-02-14 Pall Corporation Microporous filter system and process
US4476112A (en) 1982-05-10 1984-10-09 Stay Fresh, Inc. Food preservative composition
WO1983003984A1 (en) 1982-05-13 1983-11-24 Gerhard Kunz Method for the treatment of a liquid phase, particularly method for desalting aqueous solutions, as well as device for its implementation
US4414172A (en) 1982-05-21 1983-11-08 Filtertek, Inc. Process and apparatus for sealing a plurality of filter elements
JPS5952507A (en) 1982-06-03 1984-03-27 デ−・エル・エム・ドクトル・ミユラ−・アクチエンゲゼルシヤフト Apparatus for continuously concentrating suspension
US4462855A (en) 1982-06-28 1984-07-31 Celanese Corporation Process for bonding polyester reinforcement elements to rubber
JPS5928971A (en) 1982-08-06 1984-02-15 川澄化学工業株式会社 Hollow yarn type mass transfer apparatus and production thereof
US4414113A (en) 1982-09-29 1983-11-08 Ecodyne Corporation Liquid purification using reverse osmosis hollow fibers
US4476015A (en) 1982-11-02 1984-10-09 V. J. Ciccone & Associates, Inc. Multiple element fluid separation device
JPS5992094A (en) 1982-11-18 1984-05-28 Agency Of Ind Science & Technol Anaerobic digestion of organic waste matter
GB2132366B (en) 1982-12-27 1987-04-08 Brunswick Corp Method and device for testing the permeability of membrane filters
US4467001A (en) 1982-12-27 1984-08-21 Albany International Corp. Process and device for applying, drying and curing a coating on filaments
CA1221645A (en) 1983-02-28 1987-05-12 Yoshihiro Okano Filtration apparatus using hollow fiber-membrane
DE3317396A1 (en) 1983-05-13 1984-11-15 Henkel KGaA, 4000 Düsseldorf USE OF COLOYERS FROM ESTERS AND AMIDES OF ACRYLIC AND / OR METHACRYLIC ACIDS AS STOCK POINTS LOW FOR PARAFFIN SOLUTIONS
GB8313635D0 (en) 1983-05-17 1983-06-22 Whatman Reeve Angel Plc Porosimeter
US4636296A (en) 1983-08-18 1987-01-13 Gerhard Kunz Process and apparatus for treatment of fluids, particularly desalinization of aqueous solutions
US4650586A (en) 1983-09-26 1987-03-17 Kinetico, Inc. Fluid treatment system
US4756875A (en) 1983-09-29 1988-07-12 Kabushiki Kaisha Toshiba Apparatus for filtering water containing radioactive substances in nuclear power plants
WO1985001449A1 (en) 1983-09-30 1985-04-11 Memtec Limited Cleaning of filters
US4888115A (en) 1983-12-29 1989-12-19 Cuno, Incorporated Cross-flow filtration
DE3582394D1 (en) 1984-04-11 1991-05-08 Syrinx Res Pty Ltd HIGH FLUX MEMBRANE.
JPS60176300U (en) 1984-04-23 1985-11-21 海洋工業株式会社 water pump
US4539940A (en) 1984-04-26 1985-09-10 Young Richard K Tube and shell heat exchanger with annular distributor
US4609465A (en) 1984-05-21 1986-09-02 Pall Corporation Filter cartridge with a connector seal
SE441236B (en) 1984-06-18 1985-09-23 Gambro Dialysatoren PROCEDURE FOR MANUFACTURING A DEVICE CONTAINING A HALFIBER BUNCH
EP0170895B1 (en) 1984-07-09 1989-03-22 Millipore Corporation Improved electrodeionization apparatus and method
JPS6125903U (en) 1984-07-24 1986-02-15 株式会社 伊藤鉄工所 filtration equipment
DE3428307A1 (en) 1984-08-01 1986-02-13 Filterwerk Mann & Hummel Gmbh, 7140 Ludwigsburg DISPLAY DEVICE FOR THE POLLUTION LEVEL OF SUCTION AIR FILTERS
US5192478A (en) 1984-10-22 1993-03-09 The Dow Chemical Company Method of forming tubesheet for hollow fibers
US5198162A (en) 1984-12-19 1993-03-30 Scimat Limited Microporous films
GB2168981B (en) 1984-12-27 1988-07-06 Asahi Chemical Ind Porous fluorine resin membrane and process for preparation thereof
ATE81796T1 (en) 1985-03-05 1992-11-15 Memtec Ltd CONCENTRATION OF SOLIDS IN A SUSPENSION.
US5024762A (en) 1985-03-05 1991-06-18 Memtec Limited Concentration of solids in a suspension
US4642182A (en) 1985-03-07 1987-02-10 Mordeki Drori Multiple-disc type filter with extensible support
EP0216876B1 (en) 1985-03-28 1990-05-16 Memtec Limited Cooling hollow fibre cross-flow separators
US4704324A (en) 1985-04-03 1987-11-03 The Dow Chemical Company Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups
JPS62502452A (en) 1985-04-10 1987-09-24 メムテック・リミテッド Variable volume filter or concentrator
US4610789A (en) 1985-04-22 1986-09-09 Ppg Industries, Inc. Filtration cartridge and reactor
CA1247329A (en) 1985-05-06 1988-12-28 Craig J. Brown Fluid treatment process and apparatus
JPS61274709A (en) 1985-05-29 1986-12-04 Ebara Corp Hollow yarn membrane filter apparatus
US4660411A (en) 1985-05-31 1987-04-28 Reid Philip L Apparatus for measuring transmission of volatile substances through films
DE3529175A1 (en) 1985-08-14 1987-02-19 Gft Ingenieurbuero DEVICE FOR SEPARATING MIXED MEANS OF THE PERVAPORATION METHOD
US4656865A (en) 1985-09-09 1987-04-14 The Dow Chemical Company System for analyzing permeation of a gas or vapor through a film or membrane
US4908114A (en) 1985-09-27 1990-03-13 William Ayers Mobile atom insertion reaction, mobile atom transmissive membrane for carrying out the reaction, and reactor incorporating the mobile atom transmissive membrane
US4876006A (en) 1985-10-08 1989-10-24 Ebara Corporation Hollow fiber filter device
US4824563A (en) 1985-12-04 1989-04-25 Kabushiki Kaisha Meidensha Equipment for treating waste water
US4687578A (en) 1985-12-12 1987-08-18 Monsanto Company Fluid separation membranes
DE3546091A1 (en) 1985-12-24 1987-07-02 Kernforschungsz Karlsruhe CROSS-CURRENT MICROFILTER
US4779448A (en) 1986-01-28 1988-10-25 Donaldson Company, Inc. Photoelectric bubble detector apparatus and method
JPH0742861B2 (en) 1986-03-10 1995-05-15 ヤマハ発動機株式会社 Internal combustion engine intake system
US4774132A (en) 1986-05-01 1988-09-27 Pall Corporation Polyvinylidene difluoride structure
DE3617724A1 (en) 1986-05-27 1987-12-03 Akzo Gmbh METHOD FOR DETERMINING THE BLOW POINT OR THE BIGGEST PORE OF MEMBRANES OR FILTER MATERIALS
FR2600265B1 (en) 1986-06-20 1991-09-06 Rhone Poulenc Rech DRY AND HYDROPHILIC SEMI-PERMEABLE MEMBRANES BASED ON VINYLIDENE POLYFLUORIDE
FR2601182B1 (en) 1986-07-07 1992-01-24 Electricite De France PROCESS FOR THE RADIOACTIVE DECONTAMINATION OF A LUBRICANT
US4670145A (en) 1986-07-08 1987-06-02 E. I. Du Pont De Nemours And Company Multiple bundle fluid separation apparatus
US4839048A (en) 1986-07-08 1989-06-13 Pall Corporation Container for pressurized fluid
JPH01501046A (en) 1986-09-04 1989-04-13 メムテック・リミテッド How to clean hollow fiber filters
EP0282539B1 (en) 1986-09-12 1992-01-29 Memtec Limited Hollow fibre filter cartridge and header
US5094750A (en) 1986-09-12 1992-03-10 Memtec Limited Hollow fibre filter cartridge and header
DE3636583A1 (en) 1986-10-28 1988-05-05 Draegerwerk Ag METHOD FOR PRODUCING A HOLLOW FIBER FABRIC EXCHANGE MODULE AND MODULE PRODUCED BY THIS METHOD
US4781831A (en) 1986-12-19 1988-11-01 Goldsmith Robert L Cross-flow filtration device with filtrate flow conduits and method of forming same
US4834998A (en) 1986-12-22 1989-05-30 Heublein, Inc. Ultrafiltration of red wines
AU623848B2 (en) 1987-01-20 1992-05-28 Terumo Kabushiki Kaisha Porous polypropylene membrane and process for its production
US4867883A (en) 1987-04-21 1989-09-19 Hampton Roads Sanitation District Of The Commonwealth Of Virginia High-rate biological waste water treatment process using activated sludge recycle
US4846970A (en) 1987-06-22 1989-07-11 Osmonics, Inc. Cross-flow filtration membrane test unit
EP0343247B1 (en) 1987-07-30 1993-03-03 Toray Industries, Inc. Porous polytetrafluoroethylene membrane, separating apparatus using same, and process for their production
JPS6438197A (en) 1987-07-31 1989-02-08 Nishihara Env San Res Co Ltd Treatment of sewage
US4784771A (en) 1987-08-03 1988-11-15 Environmental Water Technology, Inc. Method and apparatus for purifying fluids
DE3803341A1 (en) 1988-02-04 1989-08-10 Sartorius Gmbh FLUID-OPEN-ENDING SITES HAVING POROESE MEMBRANE FILTERS AND THEIR USE
US5221478A (en) 1988-02-05 1993-06-22 The Dow Chemical Company Chromatographic separation using ion-exchange resins
US4904426A (en) 1988-03-31 1990-02-27 The Dow Chemical Company Process for the production of fibers from poly(etheretherketone)-type polymers
GB8807825D0 (en) 1988-03-31 1988-05-05 Romicon Inc Multiple membrane filtration systems
DE3824359A1 (en) 1988-04-07 1989-10-19 Bayer Ag COMPOSITE MEMBRANES, METHOD FOR THEIR PRODUCTION AND THEIR USE
US4800019A (en) 1988-04-22 1989-01-24 Union Carbide Corporation Tubesheet for semipermeable membrane devices
US5147553A (en) 1988-05-04 1992-09-15 Ionics, Incorporated Selectively permeable barriers
US4966699A (en) 1988-05-25 1990-10-30 Terumo Kabushiki Kaisha Hollow fiber membrane fluid processor
US4886601A (en) 1988-05-31 1989-12-12 Japan Organo Co., Ltd. Column filter using bundles of long fibers
JP2830080B2 (en) 1988-07-08 1998-12-02 株式会社デンソー Filter element and manufacturing method thereof
US5075065A (en) 1988-08-01 1991-12-24 Chemical Fabrics Corporation Method for manufacturing of cast films at high productivity
US5043113A (en) 1988-08-05 1991-08-27 Hoechst Celanese Corp. Process for formation of halogenated polymeric microporous membranes having improved strength properties
DE3829766A1 (en) 1988-09-01 1990-03-22 Akzo Gmbh METHOD FOR PRODUCING MEMBRANES
US4963304A (en) 1988-09-26 1990-10-16 The Dow Chemical Company Process for preparing microporous membranes
FR2639248B1 (en) 1988-11-21 1990-12-28 Lyonnaise Eaux HOUSING FOR FILTER MODULES WITH FIBER BEAMS
US4919815A (en) 1989-02-06 1990-04-24 Zimpro/Passavant Inc. Two-stage anaerobic/aerobic treatment process
US4999038A (en) 1989-02-07 1991-03-12 Lundberg Bo E H Filter unit
DE3904544A1 (en) 1989-02-15 1990-08-16 Fraunhofer Ges Forschung POLYMINE MEMBRANES BASED ON POLYVINYLIDENE FLUORIDE, METHOD FOR THE PRODUCTION AND USE THEREOF
US4952317A (en) 1989-03-10 1990-08-28 Bradley Culkin Device and method for filtering a colloidal suspension
NL8901090A (en) 1989-04-28 1990-11-16 X Flow Bv METHOD FOR MANUFACTURING A MICROPOROUS MEMBRANE AND SUCH MEMBRANE
US4988444A (en) 1989-05-12 1991-01-29 E. I. Du Pont De Nemours And Company Prevention of biofouling of reverse osmosis membranes
US5005430A (en) 1989-05-16 1991-04-09 Electric Power Research Institute, Inc. Automated membrane filter sampler
DE3916511A1 (en) 1989-05-20 1990-12-13 Seitz Filter Werke MEMBRANE FILTER DEVICE FOR MICRO AND ULTRAFILTRATION OF FLUIDS IN THE CROSSFLOW PROCESS
US5138870A (en) 1989-07-10 1992-08-18 Lyssy Georges H Apparatus for measuring water vapor permeability through sheet materials
DE3923128A1 (en) 1989-07-13 1991-01-24 Akzo Gmbh FLAX OR CAPILLARY MEMBRANE BASED ON A HOMOGENEOUS MIXTURE OF POLYVINYLIDE FLUORIDE AND OF A SECOND, BY CHEMICAL IMPROVEMENT, HYDROPHILIBLABLE POLYMERS
US5015275A (en) 1989-07-14 1991-05-14 The Dow Chemical Company Isotropic microporous syndiotactic polystyrene membranes and processes for preparing the same
DE3926059C2 (en) 1989-08-07 1998-01-29 Basf Ag Phosphonomethylated polyvinylamines, process for their preparation and their use
US5080770A (en) 1989-09-11 1992-01-14 Culkin Joseph B Apparatus and method for separating particles
US5194149A (en) 1989-09-29 1993-03-16 Memtec Limited Filter cartridge manifold
US5059317A (en) 1989-10-02 1991-10-22 Dietrich Marius Transportable apparatus for producing drinking water
US5227063A (en) 1989-10-03 1993-07-13 Zenon Environmental Inc. Tubular membrane module
EP0519132A1 (en) 1989-10-18 1992-12-23 Exxon Research And Engineering Company Hollow fiber module
US5158721A (en) 1989-11-30 1992-10-27 Millipore Corporation Porous membrane formed from interpenetrating polymer network having hydrophilic surface
US5079272A (en) 1989-11-30 1992-01-07 Millipore Corporation Porous membrane formed from interpenetrating polymer network having hydrophilic surface
FR2655642B1 (en) 1989-12-11 1992-02-28 Anjou Rech WATER TREATMENT PLANT BY A TANGENTIAL FILTER LOOP.
DE3943249C2 (en) 1989-12-29 1993-11-18 Seitz Filter Werke Closed filter element
DE4000978A1 (en) 1990-01-16 1991-07-18 Basf Ag METHOD FOR REMOVING HEAVY METALIONS FROM WINE AND WINE-BASED BEVERAGES
ATE112754T1 (en) 1990-01-23 1994-10-15 Kaldnes Miljoteknologi As METHOD AND REACTOR FOR PURIFICATION OF WATER.
US5066375A (en) 1990-03-19 1991-11-19 Ionics, Incorporated Introducing and removing ion-exchange and other particulates from an assembled electrodeionization stack
JP3181909B2 (en) 1990-04-20 2001-07-03 メムテック・リミテッド Modular microporous filter assembly
US5364527A (en) 1990-06-20 1994-11-15 Heinz Zimmermann Apparatus and process for treating water
US5104546A (en) 1990-07-03 1992-04-14 Aluminum Company Of America Pyrogens separations by ceramic ultrafiltration
US5639373A (en) 1995-08-11 1997-06-17 Zenon Environmental Inc. Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate
US5104535A (en) 1990-08-17 1992-04-14 Zenon Environmental, Inc. Frameless array of hollow fiber membranes and module containing a stack of arrays
US5248424A (en) 1990-08-17 1993-09-28 Zenon Environmental Inc. Frameless array of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate
US5182019A (en) 1990-08-17 1993-01-26 Zenon Environmental Inc. Cartridge of hybrid frameless arrays of hollow fiber membranes and module containing an assembly of cartridges
FR2666245B1 (en) 1990-08-31 1992-10-23 Lyonnaise Eaux METHOD FOR CONTROLLING THE OPERATING MODES OF AN AUTOMATIC WATER FILTRATION APPARATUS ON TUBULAR MEMBRANES.
JP2904564B2 (en) 1990-08-31 1999-06-14 オルガノ株式会社 Method of scrubbing filtration tower using hollow fiber membrane
JP2858913B2 (en) 1990-09-26 1999-02-17 オルガノ株式会社 Filtration method using hollow fiber membrane
US5102550A (en) 1990-11-01 1992-04-07 The United States Of America As Represented By The Secretary Of The Navy Apparatus and process for desalination of seawater
USH1045H (en) 1990-11-19 1992-05-05 The United States Of America As Represented By The Secretary Of The Army Air bubble leak detection test device
US5069065A (en) 1991-01-16 1991-12-03 Mobil Oil Corporation Method for measuring wettability of porous rock
US5677360A (en) 1991-02-13 1997-10-14 Mitsubishi Rayon Co., Ltd. Hydrophilic polymer alloy, fiber and porous membrane comprising this polymer alloy, and methods for preparing them
DK0510328T3 (en) 1991-03-07 1996-02-05 Kubota Kk Apparatus for treating activated sludge
EP0509152A1 (en) 1991-04-17 1992-10-21 Ecotechniek B.V. Method and apparatus for processing manure
WO1992019547A1 (en) 1991-05-01 1992-11-12 Level Valley Dairy Company Wastewater treatment system
DE4119040C2 (en) 1991-06-10 1997-01-02 Pall Corp Method and device for testing the operating state of filter elements
US5211823A (en) 1991-06-19 1993-05-18 Millipore Corporation Process for purifying resins utilizing bipolar interface
US5156738A (en) 1991-06-21 1992-10-20 Johnson Filtration Systems Inc. Apparatus for uniformly distributing gas and/or liquid in an underdrain lateral system
US5643455A (en) 1991-08-07 1997-07-01 Memtel Limited Concentration of solids in a suspension using hollow fibre membranes
US5186821A (en) 1991-09-03 1993-02-16 D. Thomas Murphy Wastewater treatment process with cooperating velocity equalization, aeration and decanting means
US5135663A (en) 1991-10-18 1992-08-04 Loctite Corporation Method of treating (meth)acrylic monomer-containing wastewater
US5137631A (en) 1991-10-22 1992-08-11 E. I. Du Pont De Nemours And Company Multiple bundle permeator
US5180407A (en) 1991-11-14 1993-01-19 Demarco Thomas M Vacuum loader with vaned and short tangential separator
US5192442A (en) 1991-12-02 1993-03-09 Zimpro Passavant Environmental Systems, Inc. Multiple zone batch treatment process
US5269919A (en) 1992-01-17 1993-12-14 Von Medlin Wallace Self-contained water treatment system
US5556591A (en) 1992-01-21 1996-09-17 Millipore S.A. Membrane sealing techniques using thermoplastic polymers
US5203405A (en) 1992-02-03 1993-04-20 Phillips Petroleum Company Two pass shell and tube heat exchanger with return annular distributor
US5198116A (en) 1992-02-10 1993-03-30 D.W. Walker & Associates Method and apparatus for measuring the fouling potential of membrane system feeds
US5480553A (en) 1992-02-12 1996-01-02 Mitsubishi Rayon Co., Ltd. Hollow fiber membrane module
FR2697446B1 (en) 1992-11-03 1994-12-02 Aquasource Process for the treatment of a fluid containing suspended and dissolved materials, using separation membranes.
US5411663A (en) 1992-03-20 1995-05-02 Micron Separations, Inc. Alcohol-insoluble nylon microporous membranes
DE69313574T2 (en) 1992-05-01 1998-01-08 Filtec Corp Device for checking the integrity of membrane filters
ATE144725T1 (en) 1992-05-18 1996-11-15 Minntech Corp HOLLOW FIBER FILTER CARTRIDGE AND METHOD FOR THE PRODUCTION THEREOF
CA2100643A1 (en) 1992-08-14 1994-02-15 Guido Sartori Fluorinated polyolefin membranes for aromatics/saturates separation
WO1994006734A1 (en) 1992-09-14 1994-03-31 Dowmus Pty. Ltd. Methods and apparatus for disposal and treatment of waste
US5244579A (en) 1992-10-09 1993-09-14 Zenon Environmental Inc. Transportable reverse osmosis water purification unit
US5275766A (en) 1992-10-30 1994-01-04 Corning Incorporate Method for making semi-permeable polymer membranes
JP3364804B2 (en) 1992-11-02 2003-01-08 メムテック リミテッド Fiber monitoring device
US5320760A (en) 1992-12-07 1994-06-14 E. I. Du Pont De Nemours And Company Method of determining filter pluggage by measuring pressures
US5262054A (en) 1992-12-30 1993-11-16 E. I. Du Pont De Nemours And Company Process for opening reverse osmosis membranes
US5401401A (en) 1993-01-13 1995-03-28 Aquaria Inc. Hang on tank canister filter
US5374353A (en) 1993-01-21 1994-12-20 Murphy; D. Thomas Aeration train and aeration apparatus for biological purification of wastewater
US5316671A (en) 1993-01-21 1994-05-31 Murphy D Thomas Submersible aeration train and aeration apparatus for biological purification of sewage
US5468397A (en) 1993-03-16 1995-11-21 Memtec America Corporation Gas backwash of pleated filters
US5389260A (en) 1993-04-02 1995-02-14 Clack Corporation Brine seal for tubular filter
US5514278A (en) 1993-04-12 1996-05-07 Khudenko; Boris M. Counterflow microbiological processes
US5361625A (en) 1993-04-29 1994-11-08 Ylvisaker Jon A Method and device for the measurement of barrier properties of films against gases
US5297420A (en) 1993-05-19 1994-03-29 Mobil Oil Corporation Apparatus and method for measuring relative permeability and capillary pressure of porous rock
US5401405A (en) 1993-05-24 1995-03-28 Davis Water & Waste Industries, Inc. Combined air/water backwash in a travelling bridge filter
FR2705734B1 (en) 1993-05-25 1995-06-30 Snecma Method and device for improving the safety of fluid filters.
IL105875A (en) 1993-06-01 1998-04-05 Aga Ab Selective clogging of failed fibers
US5425415A (en) 1993-06-15 1995-06-20 Abb Lummus Crest Inc. Vertical heat exchanger
US5358732A (en) 1993-08-10 1994-10-25 Albert Einstein College Of Medicine Of Yeshiva University Method and system for removing impurities from aliments
JPH07112185A (en) 1993-08-26 1995-05-02 Nitto Denko Corp Waste water treating device and washing method therefor
JP3342928B2 (en) 1993-09-13 2002-11-11 オルガノ株式会社 Hanging equipment for filtration equipment using hollow fiber modules
US5419816A (en) 1993-10-27 1995-05-30 Halox Technologies Corporation Electrolytic process and apparatus for the controlled oxidation of inorganic and organic species in aqueous solutions
FR2713220B1 (en) 1993-11-30 1996-03-08 Omnium Traitement Valorisa Installation of water purification with submerged filter membranes.
US5403479A (en) 1993-12-20 1995-04-04 Zenon Environmental Inc. In situ cleaning system for fouled membranes
JP3160140B2 (en) 1993-12-22 2001-04-23 オルガノ株式会社 Filtration device using hollow fiber module
TW255835B (en) 1994-01-07 1995-09-01 Kubota Kk Filtration membrane module
US6036030A (en) 1994-02-02 2000-03-14 Bechtel Bwxt Idaho Llc Method for producing a selectively permeable separation module
DK175061B1 (en) 1994-03-02 2004-05-10 Apv Pasilac As Membrane filtration Event
DE4406952A1 (en) 1994-03-03 1995-09-07 Bayer Ag Process for concentrating paint overspray
US5501798A (en) 1994-04-06 1996-03-26 Zenon Environmental, Inc. Microfiltration enhanced reverse osmosis for water treatment
US5556541A (en) 1994-04-26 1996-09-17 Filtertek, Inc. Process for making hermetically sealed filter units and filters made thereby
JP3396085B2 (en) 1994-05-24 2003-04-14 テルモ株式会社 Hollow fiber membrane type blood processor
JPH07313850A (en) 1994-05-30 1995-12-05 Kubota Corp Immersion type ceramic membrane separator backwash method
US5491023A (en) 1994-06-10 1996-02-13 Mobil Oil Corporation Film composition
US5531900A (en) 1994-07-07 1996-07-02 University Of Arizona Modification of polyvinylidene fluoride membrane and method of filtering
US5846425A (en) 1994-07-22 1998-12-08 Whiteman; George R. Methods for treatment of waste streams
EP0772488B1 (en) 1994-07-28 2001-01-31 Millipore Corporation Porous composite membrane and process
US5451317A (en) 1994-09-08 1995-09-19 Kubota Corporation Solid-liquid separator
AUPM800694A0 (en) 1994-09-09 1994-10-06 Memtec Limited Cleaning of hollow fibre membranes
US5470469A (en) 1994-09-16 1995-11-28 E. I. Du Pont De Nemours And Company Hollow fiber cartridge
FR2726568B1 (en) 1994-11-08 1996-12-06 Atochem Elf Sa POLYMER MIXTURES COMPRISING A HALOGEN POLYMER AND COMPATIBILIZED BY A GRAFT ALIPHATIC POLYESTER
AUPM957194A0 (en) 1994-11-18 1994-12-15 Act Electricity & Water Wastewater treatment method and plant
US5597732A (en) 1995-04-14 1997-01-28 Bryan-Brown; Michael Composting apparatus
AU2348695A (en) 1995-04-14 1996-10-30 Aquasource Method for operating and controlling a bank of filtration me mbrane modules, and bank of modules therefor
CA2190628C (en) 1995-06-07 2000-05-30 Mark D. Butler An implantable containment apparatus for a therapeutical device and method for loading and reloading the device therein
JPH09892A (en) * 1995-06-19 1997-01-07 Nok Corp Method for cleaning filtration membrane
US5906742A (en) 1995-07-05 1999-05-25 Usf Filtration And Separations Group Inc. Microfiltration membranes having high pore density and mixed isotropic and anisotropic structure
US5766479A (en) 1995-08-07 1998-06-16 Zenon Environmental Inc. Production of high purity water using reverse osmosis
US5670053A (en) 1995-08-07 1997-09-23 Zenon Environmental, Inc. Purification of gases from water using reverse osmosis
US6685832B2 (en) 1995-08-11 2004-02-03 Zenon Environmental Inc. Method of potting hollow fiber membranes
US6656356B2 (en) 1998-10-09 2003-12-02 Zenon Environmental Inc. Aerated immersed membrane system
US7087173B2 (en) 1995-08-11 2006-08-08 Zenon Environmental Inc. Inverted cavity aerator for membrane module
EP0846023B1 (en) 1995-08-11 2002-10-23 Zenon Environmental Inc. Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces
US6863823B2 (en) 2001-03-23 2005-03-08 Zenon Environmental Inc. Inverted air box aerator and aeration method for immersed membrane
US6193890B1 (en) 1995-08-11 2001-02-27 Zenon Environmental Inc. System for maintaining a clean skein of hollow fibers while filtering suspended solids
US5944997A (en) 1995-08-11 1999-08-31 Zenon Environmental Inc. System for maintaining a clean skein of hollow fibers while filtering suspended solids
EP0855212B1 (en) 1995-09-21 2006-11-15 Asahi Kasei Kabushiki Kaisha Hollow fiber membrane module
RU2119817C1 (en) 1995-10-23 1998-10-10 Акционерное общество открытого типа "Полимерсинтез" Porous fluorocarbon membrane, method of its preparation, and cartridge filter based on this membrane
US5626755A (en) 1995-11-08 1997-05-06 Micronair, Inc. Method and apparatus for waste digestion using multiple biological processes
FR2741280B1 (en) 1995-11-22 1997-12-19 Omnium Traitement Valorisa METHOD FOR CLEANING A FILTER SYSTEM OF THE SUBMERSIBLE MEMBRANE TYPE
US5744037A (en) 1995-11-28 1998-04-28 Ebara Corporation Method of treating foul water
US6074718A (en) 1996-02-06 2000-06-13 Koch Membrane Systems, Inc. Self supporting hollow fiber membrane and method of construction
US5895570A (en) 1996-02-09 1999-04-20 United States Filter Corporation Modular filtering system
US6077435A (en) 1996-03-15 2000-06-20 Usf Filtration And Separations Group Inc. Filtration monitoring and control system
EP0814116A1 (en) 1996-06-19 1997-12-29 Hüls Aktiengesellschaft Hydrophilic coating of polymeric substrate surfaces
EP0813897A3 (en) 1996-06-21 1998-06-24 Japan Pionics Co., Ltd. Dust removing apparatus and dust removing method
US5989428A (en) 1996-06-21 1999-11-23 Goronszy; Mervyn Charles Controlling wastewater treatment by monitoring oxygen utilization rates
US5958243A (en) 1996-07-11 1999-09-28 Zenon Environmental Inc. Apparatus and method for membrane filtration with enhanced net flux
US5814234A (en) 1996-08-14 1998-09-29 Prosys Corporation Integrated soil and fluid decontamination system
JPH10110657A (en) 1996-08-22 1998-04-28 Stanadyne Automot Corp Filter assembly having matching cartridge support structure
US5888401A (en) 1996-09-16 1999-03-30 Union Camp Corporation Method and apparatus for reducing membrane fouling
JP3686918B2 (en) 1996-10-16 2005-08-24 森村興産株式会社 Filtration device for solid-liquid separation of sewage, wastewater, etc.
EP1010457A4 (en) 1996-12-10 2006-03-22 Asahi Chemical Ind Porous polyvinylidene fluoride resin film and process for producing the same
AUPO412596A0 (en) 1996-12-10 1997-01-09 Memtec America Corporation Improved microporous membrane filtration assembly
US6045899A (en) 1996-12-12 2000-04-04 Usf Filtration & Separations Group, Inc. Highly assymetric, hydrophilic, microfiltration membranes having large pore diameters
US20040232076A1 (en) 1996-12-20 2004-11-25 Fufang Zha Scouring method
AU721064B2 (en) 1996-12-20 2000-06-22 Evoqua Water Technologies Llc Scouring method
US6214232B1 (en) 1996-12-21 2001-04-10 Akzo Nobel Nv Membrane module with layered hollow-fiber membranes
DE19700493A1 (en) 1997-01-09 1998-07-16 Bayer Ag Methods for cleaning surfaces
US6146747A (en) 1997-01-22 2000-11-14 Usf Filtration And Separations Group Inc. Highly porous polyvinylidene difluoride membranes
USD396726S (en) 1997-02-06 1998-08-04 Abc Group Combined air intake manifold and filter
JP3887072B2 (en) * 1997-02-12 2007-02-28 株式会社クラレ Method for cleaning hollow fiber membrane module and filtration device used in the method
US6120688A (en) 1997-02-25 2000-09-19 Zenon Environmental, Inc. Portable reverse osmosis unit for producing drinking water
US6007712A (en) 1997-02-28 1999-12-28 Kuraray Co., Ltd. Waste water treatment apparatus
US6048454A (en) 1997-03-18 2000-04-11 Jenkins; Dan Oil filter pack and assembly
US5733456A (en) 1997-03-31 1998-03-31 Okey; Robert W. Environmental control for biological nutrient removal in water/wastewater treatment
AUPO709797A0 (en) 1997-05-30 1997-06-26 Usf Filtration And Separations Group Inc. Predicting logarithmic reduction values
US5914039A (en) 1997-07-01 1999-06-22 Zenon Environmental Inc. Filtration membrane with calcined α-alumina particles therein
US6354444B1 (en) 1997-07-01 2002-03-12 Zenon Environmental Inc. Hollow fiber membrane and braided tubular support therefor
US5997745A (en) 1998-04-08 1999-12-07 Zenon Environmental Inc. Method for producing high purity water using triple pass reverse osmosis (TPRO)
US6641733B2 (en) 1998-09-25 2003-11-04 U. S. Filter Wastewater Group, Inc. Apparatus and method for cleaning membrane filtration modules
US6017451A (en) 1997-10-01 2000-01-25 Kopf; Henry B. Spider fitting for multi-module filter system, and motive cart assembly comprising same
US6083393A (en) 1997-10-27 2000-07-04 Pall Corporation Hydrophilic membrane
US6039872A (en) 1997-10-27 2000-03-21 Pall Corporation Hydrophilic membrane
US6723758B2 (en) 1997-11-12 2004-04-20 Ballard Power Systems Inc. Graft polymeric membranes and ion-exchange membranes formed therefrom
US6290756B1 (en) 1997-12-03 2001-09-18 Praxair Technology, Inc. Hollow fiber membrane tubesheets of variable epoxy composition and hardness
JP3866399B2 (en) 1997-12-16 2007-01-10 住友重機械工業株式会社 Membrane filtration device and operation method thereof
CN1294622A (en) 1998-02-27 2001-05-09 三菱丽阳株式会社 Crude oil processing device and crude oil processing method
US6126819A (en) 1998-03-13 2000-10-03 Rochem Ro-Wasserbehandlung Gmbh Apparatus for the treatment of liquids contaminated by foreign substances
US5951878A (en) 1998-03-20 1999-09-14 Aqua-Aerobic Systems, Inc. Method and apparatus for cleaning filter material in a filter apparatus utilizing a suction generating nozzle
ES2253878T3 (en) 1998-03-31 2006-06-01 Samsung Engineering Co., Ltd. METHOD OF WASTEWATER TREATMENT TO SEPARATE ORGANIC AND NITROGEN MATTER.
FR2781168B1 (en) 1998-07-17 2000-09-15 Polymem WATER TREATMENT PROCESS AND INSTALLATION
WO2000004986A1 (en) 1998-07-21 2000-02-03 Toray Industries, Inc. Method for inhibiting growth of bacteria or sterilizing around separating membrane
US6113782A (en) 1998-07-28 2000-09-05 Terumo Cardiovascular Systems Corporation Potting of tubular bundles in housing
US6280626B1 (en) 1998-08-12 2001-08-28 Mitsubishi Rayon Co., Ltd. Membrane separator assembly and method of cleaning the assembly utilizing gas diffuser underneath the assembly
US6096213A (en) 1998-08-14 2000-08-01 3M Innovative Properties Company Puncture-resistant polyolefin membranes
US5968357A (en) 1998-08-27 1999-10-19 Voith Sulzer Paper Technology North America, Inc. Screen basket having a removable and replaceable cylindrical mesh liner
US6071404A (en) 1998-08-31 2000-06-06 Tsui; Tommy Water treating device
UA72220C2 (en) 1998-09-08 2005-02-15 Байоенджініерінг Рісорсиз, Інк. Water-immiscible mixture solvent/cosolvent for extracting acetic acid, a method for producing acetic acid (variants), a method for anaerobic microbial fermentation for obtaining acetic acid (variants), modified solvent and a method for obtaining thereof
TWI222895B (en) 1998-09-25 2004-11-01 Usf Filtration & Separations Apparatus and method for cleaning membrane filtration modules
KR100634240B1 (en) 1998-09-28 2006-10-16 글렌 디. 린드보 Wastewater treatment tank including preliminary reaction zone with influent sewage gate and outwardly flared bottom
US6706189B2 (en) 1998-10-09 2004-03-16 Zenon Environmental Inc. Cyclic aeration system for submerged membrane modules
US6550747B2 (en) 1998-10-09 2003-04-22 Zenon Environmental Inc. Cyclic aeration system for submerged membrane modules
EP1119522B1 (en) 1998-10-09 2004-04-14 Zenon Environmental Inc. Cyclic aeration system for submerged membrane modules
US7014173B2 (en) 1998-10-09 2006-03-21 Zenon Environmental Inc. Cyclic aeration system for submerged membrane modules
US6319411B1 (en) 1998-10-09 2001-11-20 Zenon Environmental Inc. Method of maintaining clean vertical skeins of hollow fiber membranes and system therefor
NL1010544C2 (en) 1998-11-13 2000-05-16 Stork Friesland Bv Method and device for removing suspended matter and salts from a liquid by means of membrane filtration.
JP2002530188A (en) 1998-11-23 2002-09-17 ゼノン、エンバイロンメンタル、インコーポレーテッド Filtration of water using immersion membrane
CA2290053C (en) 1999-11-18 2009-10-20 Zenon Environmental Inc. Immersed membrane module and process
JP4107453B2 (en) 1998-11-26 2008-06-25 旭化成ケミカルズ株式会社 Hollow fiber membrane cartridge
GB9826575D0 (en) 1998-12-04 1999-01-27 Oladpa Tox
US6162020A (en) 1998-12-04 2000-12-19 Nca2Bioprocess, Inc. Airlift pump apparatus and method
US6156200A (en) 1998-12-08 2000-12-05 Usf Filtration & Separations Group, Inc. Gas-scrubbed hollow fiber membrane module
DE19959916A1 (en) 1998-12-30 2000-07-20 Henkel Chile Sa Aqueous polymer dispersion, useful for adhesives and coatings, contains organic and/or inorganic filler particles and organic polymer particles that are formed in presence of at least one filler
US6432310B1 (en) 1999-01-22 2002-08-13 Nitto Denko Corporation Methods of running and washing spiral wound membrane module
JP4200576B2 (en) 1999-02-23 2008-12-24 トヨタ自動車株式会社 Fuel cell system
US6149817A (en) 1999-03-08 2000-11-21 Celgard Inc. Shell-less hollow fiber membrane fluid contactor
WO2000058038A1 (en) 1999-03-26 2000-10-05 Sumitomo Heavy Industries, Ltd. Method apparatus for disposal of chlorine-containing organic compound
US6770202B1 (en) 1999-04-14 2004-08-03 Pall Corporation Porous membrane
AUPP985099A0 (en) 1999-04-20 1999-05-13 Usf Filtration And Separations Group Inc. Membrane filtration manifold system
US6322703B1 (en) 1999-04-20 2001-11-27 Asahi Kasei Kabushiki Kaisha Method for purifying aqueous suspension
US6221247B1 (en) 1999-06-03 2001-04-24 Cms Technology Holdings, Inc. Dioxole coated membrane module for ultrafiltration or microfiltration of aqueous suspensions
US6627082B2 (en) 1999-06-10 2003-09-30 Envirogen, Inc. System and method for withdrawing permeate through a filter and for cleaning the filter in situ
US6277512B1 (en) 1999-06-18 2001-08-21 3M Innovative Properties Company Polymer electrolyte membranes from mixed dispersions
US6755970B1 (en) 1999-06-22 2004-06-29 Trisep Corporation Back-flushable spiral wound filter and methods of making and using same
US6485645B1 (en) 1999-07-20 2002-11-26 Zenon Environmental Inc Biological process for removing phosphorus involving a membrane filter
US6406629B1 (en) 1999-07-20 2002-06-18 Zenon Environmental Inc. Biological process for removing phosphorous involving a membrane filter
US6303035B1 (en) 1999-07-30 2001-10-16 Zenon Environmental Inc. Immersed membrane filtration process
US20040007525A1 (en) 1999-07-30 2004-01-15 Rabie Hamid R. Maintenance cleaning for membranes
US20010052494A1 (en) * 1999-10-25 2001-12-20 Pierre Cote Chemical cleaning backwash for normally immersed membranes
FR2797198B1 (en) 1999-08-04 2002-05-03 Tami Ind MEMBRANE FOR TANGENTIAL FILTRATION AND ITS MANUFACTURING METHOD
US6214231B1 (en) 1999-08-27 2001-04-10 Zenon Environmental Inc. System for operation of multiple membrane filtration assemblies
DE19940994B4 (en) 1999-08-28 2004-02-26 Clausthaler Umwelttechnikinstitut Gmbh, (Cutec-Institut) Process for the removal of sewage sludge
US6589426B1 (en) 1999-09-29 2003-07-08 Zenon Environmental Inc. Ultrafiltration and microfiltration module and system
US6361695B1 (en) 1999-10-02 2002-03-26 Zenon Environmental Inc. Shipboard wastewater treatment system
US6623643B2 (en) 1999-11-19 2003-09-23 Microtek Medical Holdings, Inc. Process for treatment of aqueous environments containing a water soluble polymer
US6861001B2 (en) 1999-12-02 2005-03-01 The General Hospital Corporation Methods for removal, purification, and concentration of viruses, and methods of therapy based thereupon
US6423784B1 (en) 1999-12-15 2002-07-23 3M Innovative Properties Company Acid functional fluoropolymer membranes and method of manufacture
FR2802444B1 (en) 1999-12-16 2002-06-14 Polymen HOLLOW FIBER WATER FILTRATION MODULE
ES2236027T3 (en) 1999-12-17 2005-07-16 Millipore Corporation ENCAPSULATED OF HOLLOW FIBERS WRAPPED IN SPIRAL.
US6324898B1 (en) 1999-12-21 2001-12-04 Zenon Environmental Inc. Method and apparatus for testing the integrity of filtering membranes
EP1164157B1 (en) 1999-12-28 2007-01-17 Hitoshi Kanazawa Method of modifying polymeric material and use thereof
US6315895B1 (en) 1999-12-30 2001-11-13 Nephros, Inc. Dual-stage hemodiafiltration cartridge
US6635179B1 (en) 1999-12-30 2003-10-21 Nephros, Inc. Sterile fluid filtration cartridge and method for using same
JP2001212587A (en) 2000-02-04 2001-08-07 Kubota Corp Aeration method and apparatus for membrane activated sludge process
USD478913S1 (en) 2000-02-24 2003-08-26 Usf Filtration And Separations Group, Inc. Manifold header
GB0004921D0 (en) 2000-03-02 2000-04-19 Waterleau Global Water Technol System for sustainable treatment of municipal and industrial wastewater
US6440303B2 (en) 2000-03-02 2002-08-27 Chapin Manufacturing, Inc. Fluid filter
US6926829B2 (en) 2000-03-06 2005-08-09 Kvaerner Process Systems A.S. Apparatus and method for separating fluids through a membrane
ATE352524T1 (en) 2000-03-08 2007-02-15 Zenon Technology Partnership REACTOR WITH MEMBRANE MODULE FOR GAS TRANSFER AND MEMBRANE-ASSISTED BIOFILM PROCESS
US6875357B1 (en) 2000-03-15 2005-04-05 Aqua-Aerobic Systems, Inc. Process and apparatus for treatment of waste water
US6299775B1 (en) 2000-03-17 2001-10-09 Clint R. Elston Waste and wastewater treatment and recycling system
AUPQ680100A0 (en) 2000-04-10 2000-05-11 Usf Filtration And Separations Group Inc. Hollow fibre restraining system
US6337018B1 (en) 2000-04-17 2002-01-08 The Dow Chemical Company Composite membrane and method for making the same
US6936085B2 (en) 2000-05-10 2005-08-30 Demarco Maxvac Corporation Vacuum loader
AU142387S (en) 2000-05-31 2000-11-27 Evoqua Water Tech Llc Manifold header cap
EP1166871A1 (en) 2000-06-21 2002-01-02 Fuji Photo Film B.V. Photocalytic sheet of film and its manufacturing process
DE60142783D1 (en) 2000-06-29 2010-09-23 Biogasol Ipr Aps METHOD FOR REMOVING AND CLEANING PART VOLUMES OF PROCESS FLUIDS
US7083726B2 (en) 2000-07-10 2006-08-01 Asahi Kasei Kabushiki Kaisha Hollow thread film cartridge, hollow thread film module using the cartridge, and tank type filter
EP1174177A3 (en) 2000-07-18 2002-12-04 Nitto Denko Corporation Spiral wound membrane element, spiral wound membrane module and treatment system employing the same as well as running method and washing method therefor
US6517723B1 (en) 2000-07-27 2003-02-11 Ch2M Hill, Inc. Method and apparatus for treating wastewater using membrane filters
JP2002058968A (en) 2000-08-18 2002-02-26 Suehiro Tadashi Filter
FR2814454B1 (en) 2000-09-27 2002-12-20 Degremont PROCESS FOR THE PURIFICATION OF WASTEWATER FOR THE ELIMINATION OF NITROGEN AND PHOSPHATE POLLUTIONS
US6555002B2 (en) 2000-10-06 2003-04-29 Premier Wastwater International, Llc Apparatus and method for wastewater treatment with enhanced solids reduction (ESR)
AUPR064800A0 (en) 2000-10-09 2000-11-02 Usf Filtration And Separations Group Inc. Improved membrane filtration system
AUPR094600A0 (en) 2000-10-23 2000-11-16 Usf Filtration And Separations Group Inc. Fibre membrane arrangement
AUPR143400A0 (en) 2000-11-13 2000-12-07 Usf Filtration And Separations Group Inc. Modified membranes
US6525064B1 (en) 2000-12-08 2003-02-25 3M Innovative Properties Company Sulfonamido substituted imidazopyridines
FR2817768B1 (en) 2000-12-13 2003-08-29 Lyonnaise Eaux Eclairage METHOD FOR REGULATING A MEMBRANE FILTRATION SYSTEM
NO318619B1 (en) 2000-12-29 2005-04-18 Norsk Hydro As Device for combustion of a carbonaceous fuel, a method for operating said device, and use of said device.
GB0100647D0 (en) 2001-01-10 2001-02-21 Walker Filtration Ltd Filter unit
CA2434940A1 (en) 2001-01-23 2002-08-01 Attila Herczeg Asymmetric hollow fiber membranes
JP2004528163A (en) 2001-02-23 2004-09-16 ヴイ．エイ．アイ． リミテッド Method and apparatus for biological treatment of wastewater
CN1250326C (en) 2001-03-08 2006-04-12 东丽株式会社 Hollow fiber membrane, hollow fiber membrane module, and water purifier
JP4085151B2 (en) * 2001-03-30 2008-05-14 株式会社クラレ Cleaning method for hollow fiber membrane module
AUPR421501A0 (en) 2001-04-04 2001-05-03 U.S. Filter Wastewater Group, Inc. Potting method
BR0209036A (en) 2001-04-18 2007-01-02 Buddy Don Gray Method and apparatus for a recirculating tangential separation system
US6757059B2 (en) 2001-04-30 2004-06-29 Therma-Wave, Inc. Wafer chuck with integrated reference sample
US6805806B2 (en) 2001-06-12 2004-10-19 Hydrotreat, Inc. Method and apparatus for treatment of wastewater employing membrane bioreactors
AUPR584301A0 (en) 2001-06-20 2001-07-12 U.S. Filter Wastewater Group, Inc. Membrane polymer compositions
CA2351272C (en) 2001-06-22 2009-09-15 Petro Sep International Ltd. Membrane-assisted fluid separation apparatus and method
FR2827360B1 (en) 2001-07-11 2005-10-28 Valeo Thermique Moteur Sa CONTROL VALVE FOR A FLUID CIRCUIT CIRCUIT, ESPECIALLY FOR A COOLING CIRCUIT OF AN ENGINE
US6702561B2 (en) 2001-07-12 2004-03-09 Nxstage Medical, Inc. Devices for potting a filter for blood processing
AUPR692401A0 (en) 2001-08-09 2001-08-30 U.S. Filter Wastewater Group, Inc. Method of cleaning membrane modules
JP2003053160A (en) * 2001-08-14 2003-02-25 Mitsubishi Rayon Co Ltd Method for cleaning separation membrane and membrane filtration device
US6592762B2 (en) 2001-08-29 2003-07-15 United States Filter Corporation Process for treating BOD-containing wastewater
TW536424B (en) 2001-09-05 2003-06-11 Mitsubishi Rayon Co Water-clean cartridge, water-cleaner, and washing method of water-cleaner
AUPR774201A0 (en) 2001-09-18 2001-10-11 U.S. Filter Wastewater Group, Inc. High solids module
US6721529B2 (en) 2001-09-21 2004-04-13 Nexpress Solutions Llc Release agent donor member having fluorocarbon thermoplastic random copolymer overcoat
US6673210B2 (en) 2001-09-27 2004-01-06 Voith Paper Patent Gmbh Cleaning a semipermeable membrane in a papermaking machine
KR100441208B1 (en) 2001-10-24 2004-07-22 삼성엔지니어링 주식회사 Batch style waste water treatment apparatus using biological filtering process and waste water treatment method using the same
US7160455B2 (en) 2001-11-05 2007-01-09 Asahi Kasei Kabushiki Kaisha Hollow fiber membrane module
ATE333318T1 (en) 2001-11-16 2006-08-15 Us Filter Wastewater Group Inc METHOD FOR CLEANING MEMBRANES
US6761826B2 (en) 2001-11-30 2004-07-13 New Star Lasers, Inc. Pulsed blackbody radiation flux enhancement
US6790912B2 (en) 2001-12-11 2004-09-14 3M Innovative Properties Company Extrudable fluoropolymer blends
JP2003181247A (en) 2001-12-17 2003-07-02 Nitto Denko Corp Treatment system having spiral membrane element and its operating method
WO2003059494A1 (en) 2002-01-02 2003-07-24 Triple I Module with self-supporting sheet membranes
US6712970B1 (en) 2002-01-11 2004-03-30 Enviroquip, Inc. Sewage treatment process with phosphorus removal
US6890435B2 (en) 2002-01-28 2005-05-10 Koch Membrane Systems Hollow fiber microfiltration membranes and a method of making these membranes
US7247238B2 (en) 2002-02-12 2007-07-24 Siemens Water Technologies Corp. Poly(ethylene chlorotrifluoroethylene) membranes
US6811696B2 (en) 2002-04-12 2004-11-02 Pall Corporation Hydrophobic membrane materials for filter venting applications
US7186344B2 (en) 2002-04-17 2007-03-06 Water Visions International, Inc. Membrane based fluid treatment systems
US8668779B2 (en) 2002-04-30 2014-03-11 Nalco Company Method of simultaneously cleaning and disinfecting industrial water systems
US6869534B2 (en) 2002-05-05 2005-03-22 Brentwood Industries, Inc. Sludge digestion methods and apparatus
EP1364915A1 (en) 2002-05-22 2003-11-26 Kurita Water Industries Ltd. A biological method of phosphorus removal and biological phosphorus-removing apparatus
US6863816B2 (en) 2002-06-17 2005-03-08 Dharma Living Systems, Inc. Tidal vertical flow wastewater treatment system and method
US6743362B1 (en) 2002-06-17 2004-06-01 Enviroquip Inc. Sewage treatment process
AUPS300602A0 (en) 2002-06-18 2002-07-11 U.S. Filter Wastewater Group, Inc. Methods of minimising the effect of integrity loss in hollow fibre membrane modules
US6994867B1 (en) 2002-06-21 2006-02-07 Advanced Cardiovascular Systems, Inc. Biocompatible carrier containing L-arginine
JP2004073950A (en) * 2002-08-13 2004-03-11 Asahi Kasei Chemicals Corp Membrane cleaning method
AU2002950934A0 (en) 2002-08-21 2002-09-12 U. S. Filter Wastewater Group, Inc. Aeration method
US20040035770A1 (en) 2002-08-26 2004-02-26 Edwards Haskell L. Dynamically responsive aerobic to anoxic inter-zone flow control system for single vessel multi-zone bioreactor wastewater treatment plants
US7938966B2 (en) 2002-10-10 2011-05-10 Siemens Water Technologies Corp. Backwash method
FR2847572B1 (en) 2002-11-22 2006-04-21 Omnium Traitement Valorisa METHOD OF TREATING WATER USING INORGANIC HIGH SPECIFIC SURFACE PULVERULENT REAGENT INCLUDING A RECYCLING STAGE OF SAID REAGENT
AU2002953111A0 (en) 2002-12-05 2002-12-19 U. S. Filter Wastewater Group, Inc. Mixing chamber
US6863817B2 (en) 2002-12-05 2005-03-08 Zenon Environmental Inc. Membrane bioreactor, process and aerator
ATE490018T1 (en) 2002-12-19 2010-12-15 Hydranautics METHOD FOR CLEANING AND KEEPING A MEMBRANE SURFACE DURING FILTRATION
US20040149655A1 (en) 2003-01-31 2004-08-05 Pall Corporation Methods and systems for purifying fluids and regenerating purification media
US7014763B2 (en) 2003-02-03 2006-03-21 Aqua-Aerobic Systems, Inc. Multiple barrier biological treatment systems
DE60301322T2 (en) 2003-02-28 2006-06-08 3M Innovative Properties Co., St. Paul A fluoropolymer dispersion containing no or little fluorine-containing low molecular weight wetting agent
US7087172B2 (en) 2003-03-05 2006-08-08 Usfilter Corporation Methods for reducing nitrate demands in the reduction of dissolved and/or atmospheric sulfides in wastewater
KR20050107798A (en) 2003-03-14 2005-11-15 제논 인바이런멘탈 인코포레이티드 Nanofiltration system for water softening with internally staged spiral wound modules
RU2006103262A (en) 2003-07-04 2006-06-10 Акцо Нобель Н.В. (NL) CLEANING FILTRATION MEMBRANES WITH PEROXIDES
AU2003903507A0 (en) 2003-07-08 2003-07-24 U. S. Filter Wastewater Group, Inc. Membrane post-treatment
US6946073B2 (en) 2003-09-02 2005-09-20 Ch2M Hill, Inc. Method for treating wastewater in a membrane bioreactor to produce a low phosphorus effluent
US7294274B2 (en) 2003-07-30 2007-11-13 Phase Inc. Filtration system with enhanced cleaning and dynamic fluid separation
JP4611982B2 (en) 2003-08-29 2011-01-12 シーメンス・ウォーター・テクノロジーズ・コーポレーション Backwash method
US7282147B2 (en) 2003-10-07 2007-10-16 Phase Inc. Cleaning hollow core membrane fibers using vibration
US20050115899A1 (en) 2003-10-21 2005-06-02 Minggang Liu Membrane bioreactor having single header membrane module
US7879229B2 (en) 2003-10-29 2011-02-01 Zenon Technology Partnership Water treatment plant with immersed membranes
US7022233B2 (en) 2003-11-07 2006-04-04 Severn Trent Services, Water Purification Solutions, Inc. Biologically active reactor system and method for treating wastewater
US7083733B2 (en) 2003-11-13 2006-08-01 Usfilter Corporation Water treatment system and method
WO2005046849A1 (en) 2003-11-14 2005-05-26 U.S. Filter Wastewater Group, Inc. Improved module cleaning method
EP1533325B1 (en) 2003-11-17 2011-10-19 3M Innovative Properties Company Aqueous dispersions of polytetrafluoroethylene having a low amount of fluorinated surfactant
JP2005161179A (en) * 2003-12-02 2005-06-23 Kuraray Co Ltd Cleaning method for hollow fiber membrane module
US7279215B2 (en) 2003-12-03 2007-10-09 3M Innovative Properties Company Membrane modules and integrated membrane cassettes
WO2005070524A1 (en) 2004-01-09 2005-08-04 Trisep Corporation Filtration with low-fouling, high-flow, low-energy spiral wound membrane cartridges
KR101215912B1 (en) 2004-02-02 2012-12-31 쿠리타 고교 가부시키가이샤 Process for biological treatment of organic waste water and apparatus therefor
WO2005077499A1 (en) 2004-02-18 2005-08-25 U.S. Filter Wastewater Group, Inc. Continuous pressure decay test
US7220358B2 (en) 2004-02-23 2007-05-22 Ecolab Inc. Methods for treating membranes and separation facilities and membrane treatment composition
CA2482517A1 (en) 2004-09-24 2006-03-24 Zenon Environmental Inc. Membrane filter cleansing process
US20050194315A1 (en) 2004-02-27 2005-09-08 Adams Nicholas W.H. Membrane batch filtration process
US7311833B2 (en) 2004-03-03 2007-12-25 Kazuo Yamamoto Zero excess sludge membrane bioreactor
US7264725B2 (en) 2004-03-04 2007-09-04 Celgard Inc. Hollow fiber membrane contactor and method of making same
US8758621B2 (en) 2004-03-26 2014-06-24 Evoqua Water Technologies Llc Process and apparatus for purifying impure water using microfiltration or ultrafiltration in combination with reverse osmosis
CA2564007C (en) 2004-04-22 2011-05-31 Siemens Water Technologies Corp. Filtration apparatus comprising a membrane bioreactor and a treatment vessel for digesting organic materials
US7122121B1 (en) 2004-05-28 2006-10-17 Jiang Ji Advanced submerged membrane modules, systems and processes
WO2005118117A1 (en) 2004-05-28 2005-12-15 Siemens Water Technologies Corp. Retractable cantilever rack support
CN102512986A (en) 2004-07-02 2012-06-27 西门子工业公司 Gas transfer membrane
JP4958779B2 (en) 2004-08-20 2012-06-20 シーメンス・ウォーター・テクノロジーズ・コーポレイション Square MBR manifold system
US8790515B2 (en) 2004-09-07 2014-07-29 Evoqua Water Technologies Llc Reduction of backwash liquid waste
WO2006029456A1 (en) 2004-09-14 2006-03-23 Siemens Water Technologies Corp. Methods and apparatus for removing solids from a membrane module
CN100548452C (en) 2004-09-15 2009-10-14 西门子水技术公司 The method of incrustation in a kind of membrane filtration system and the control membrane filtration system
US7172699B1 (en) 2004-10-13 2007-02-06 Eimco Water Technologies Llc Energy efficient wastewater treatment for nitrogen and phosphorus removal
US20060081533A1 (en) 2004-10-16 2006-04-20 Khudenko Boris M Batch-continuous process and reactor
US7591950B2 (en) 2004-11-02 2009-09-22 Siemens Water Technologies Corp. Submerged cross-flow filtration
US7329344B2 (en) 2004-12-22 2008-02-12 Siemens Water Technologies Corp. Grease and scum removal in a filtration apparatus comprising a membrane bioreactor and a treatment vessel for digesting organic materials
SG2014010789A (en) 2004-12-24 2014-06-27 Siemens Industry Inc Cleaning in membrane filtration systems
CN100546701C (en) 2004-12-24 2009-10-07 西门子水技术公司 Simple gas flushing method and device
JP2008526497A (en) 2005-01-14 2008-07-24 シーメンス・ウォーター・テクノロジーズ・コーポレーション Filtration system
US7279100B2 (en) 2005-01-31 2007-10-09 Ashbrook Simon-Hartley Operations, Lp Methods and apparatus for treating wastewater employing a high rate clarifier and a membrane
US7501062B2 (en) 2005-02-22 2009-03-10 Shell Oil Company Process for permeation enhanced reactive extraction of levulinic acid
WO2006094190A2 (en) 2005-03-02 2006-09-08 Velocys Inc. Separation process using microchannel technology
US7396453B1 (en) 2005-04-19 2008-07-08 Procorp Enterprises, Llc Hydraulically integrated solids/liquid separation system for wastewater treatment
CA2605757A1 (en) 2005-04-29 2006-11-09 Siemens Water Technologies Corp. Chemical clean for membrane filter
US7326343B2 (en) 2005-05-03 2008-02-05 University Of Western Ontario Canada Treatment of wastewater containing phosphorous and nitrogen
US7147777B1 (en) 2005-05-09 2006-12-12 Eimco Water Technologies Llc Wastewater treatment system with membrane separators and provision for storm flow conditions
US20060273038A1 (en) 2005-06-02 2006-12-07 Syed Murtuza A Chemical cleaning for membranes
ES2599640T3 (en) 2005-07-12 2017-02-02 Zenon Technology Partnership Procedure control for a submerged membrane system
EP1937604A4 (en) 2005-08-12 2013-09-25 Siemens Industry Inc Biological phosphorous removal
EP1945333B1 (en) 2005-08-22 2011-06-08 Siemens Industry, Inc. An assembly for water filtration to minimise backwash volume
US7533946B2 (en) * 2005-08-25 2009-05-19 Knape & Vogt Manufacturing Company Closing device for drawers
US20070045183A1 (en) 2005-08-26 2007-03-01 Murphy Dee T Purified water reclamation process
WO2007044415A2 (en) 2005-10-05 2007-04-19 Siemens Water Technologies Corp. Method and apparatus for treating wastewater
US20070084795A1 (en) 2005-10-05 2007-04-19 Jordan Edward J Method and system for treating wastewater
US7563363B2 (en) 2005-10-05 2009-07-21 Siemens Water Technologies Corp. System for treating wastewater
JP4902661B2 (en) 2005-11-08 2012-03-21 シーメンス・ウォーター・テクノロジーズ・コーポレーション Combination of membrane filtration / biodegradation filtration
US7314563B2 (en) 2005-11-14 2008-01-01 Korea Institute Of Science And Technology Membrane coupled activated sludge method and apparatus operating anoxic/anaerobic process alternately for removal of nitrogen and phosphorous
EP1984102A4 (en) 2005-12-09 2010-05-19 Siemens Water Tech Corp Reduced backwash volume process
US7147778B1 (en) 2006-01-05 2006-12-12 I. Kruger Inc. Method and system for nitrifying and denitrifying wastewater
WO2007079540A1 (en) 2006-01-12 2007-07-19 Siemens Water Technologies Corp. Improved operating strategies in filtration processes
US7455765B2 (en) 2006-01-25 2008-11-25 Siemens Water Technologies Corp. Wastewater treatment system and method
US20100025320A1 (en) 2006-03-22 2010-02-04 Warren Thomas Johnson Backwash and cleaning method
US7713413B2 (en) 2006-04-11 2010-05-11 Siemens Water Technologies Corp. Aerated anoxic membrane bioreactor
US7510655B2 (en) 2006-04-11 2009-03-31 Siemens Water Technologies Corp. Process to improve the efficiency of a membrane filter activated sludge system
US7481933B2 (en) 2006-04-11 2009-01-27 Siemens Water Technologies Corporation Process to improve the efficiency of a membrane filter activated sludge system
US7761826B1 (en) 2006-07-24 2010-07-20 Cadence Design Systems, Inc. Method and system for crosstalk analysis
AU2008215180A1 (en) 2007-02-16 2008-08-21 Siemens Industry, Inc. Membrane filtration process and design
US8318028B2 (en) 2007-04-02 2012-11-27 Siemens Industry, Inc. Infiltration/inflow control for membrane bioreactor
CA2681920A1 (en) 2007-04-04 2008-10-16 Siemens Water Technologies Corp. Membrane module protection
US7459083B1 (en) 2007-05-07 2008-12-02 I. Kruger Inc. Method for controlling fouling of a membrane filter
CN109107392B (en) 2007-05-29 2024-11-01 杜邦特种材料新加坡私人有限公司 Membrane cleaning using pulsed stripping pump
US20120285885A1 (en) 2007-05-29 2012-11-15 Siemens Industry, Inc. Membrane cleaning with pulsed gas slugs
US20100170847A1 (en) 2007-05-29 2010-07-08 Fufang Zha Membrane cleaning using an airlift pump
US20100200503A1 (en) 2007-06-28 2010-08-12 Fufang Zha Cleaning method for simple filtration systems
DE102007041991A1 (en) 2007-09-05 2009-03-12 Fülling, Rainer, Dr. Process for the purification of substrates by oxidants and reducing agents and the use of oxidizing agents for the oxidation of extracellular polymeric substances
JP5362343B2 (en) 2008-01-11 2013-12-11 旭化成ケミカルズ株式会社 Membrane separation unit
CA2731774A1 (en) 2008-07-24 2010-01-28 Siemens Water Technologies Corp. Frame system for membrane filtration modules
US20110132826A1 (en) 2008-08-14 2011-06-09 Siemens Water Technologies Corp. Block Configuration for Large Scale Membrane Distillation
JP2012528717A (en) 2009-06-02 2012-11-15 シーメンス インダストリー インコーポレイテッド Membrane cleaning with pulsed gas slag and global aeration
AU2010101488B4 (en) 2009-06-11 2013-05-02 Evoqua Water Technologies Llc Methods for cleaning a porous polymeric membrane and a kit for cleaning a porous polymeric membrane
US9358505B2 (en) 2009-09-03 2016-06-07 General Electric Company Gas sparger for an immersed membrane
AU2011245709B2 (en) 2010-04-30 2015-06-11 Evoqua Water Technologies Llc Fluid flow distribution device
CN103118766B (en) 2010-09-24 2016-04-13 伊沃夸水处理技术有限责任公司 The fluid of membrane filtration system controls manifold
US9364805B2 (en) 2010-10-15 2016-06-14 General Electric Company Integrated gas sparger for an immersed membrane

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4935143A (en) 1986-07-11 1990-06-19 Memtec Limited Cleaning of filters
US20030150807A1 (en) 2002-01-09 2003-08-14 Hydranautics Methods for improving filtration performance of hollow fiber membranes
US20060261007A1 (en) * 2003-09-19 2006-11-23 Fufang Zha Methods of cleaning membrane modules
US20070051679A1 (en) * 2004-02-27 2007-03-08 Adams Nicholas W H Water filtration using immersed membranes
WO2008025077A1 (en) 2006-08-31 2008-03-06 Siemens Water Technologies Corp. Low pressure backwash

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ305501B6 (en) * 2010-08-24 2015-11-04 Vysoká škola chemicko-technologická v Praze, Ústav chemie a technologie sacharidů Device for backward rinsing of separation membranes in a membrane module
US9333464B1 (en) 2014-10-22 2016-05-10 Koch Membrane Systems, Inc. Membrane module system with bundle enclosures and pulsed aeration and method of operation
US9956530B2 (en) 2014-10-22 2018-05-01 Koch Membrane Systems, Inc. Membrane module system with bundle enclosures and pulsed aeration and method of operation
US10702831B2 (en) 2014-10-22 2020-07-07 Koch Separation Solutions, Inc. Membrane module system with bundle enclosures and pulsed aeration and method of operation
USD779632S1 (en) 2015-08-10 2017-02-21 Koch Membrane Systems, Inc. Bundle body
USD779631S1 (en) 2015-08-10 2017-02-21 Koch Membrane Systems, Inc. Gasification device

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EP2315625A1 (en) 2011-05-04
AU2009282912A1 (en) 2010-02-25
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EP2315625B1 (en) 2018-05-16
NZ591259A (en) 2013-02-22
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US8652331B2 (en) 2014-02-18
KR20110044312A (en) 2011-04-28

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