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Most popular research papers
Results from 99 seawater RO membrane autopsies
This paper presents results from 99 sea water reverse osmosis (SWRO) membrane autopsies carried out by the Genesys laboratory in Madrid from 2002 and outlines the technical issues surrounding fouling and scaling of sea water membranes. The authors.......
Research Papers
21 October 2011
The role of chemicals in this thirsty planet
As all the chemical elements and most of their attributable compounds are known there is little scope for further discovery in the science of ‘inorganic’ chemistry. ‘Organic’ chemistry is much more exciting as it is based on carbon which can polymerise into a multitude of different......
The role of chemicals in this thirsty planet
As all the chemical elements and most of their attributable compounds are known there is little scope for further discovery in the science of ‘inorganic’ chemistry. ‘Organic’ chemistry is much more exciting as it is based on carbon which can polymerise into a multitude of different......
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The role of chemicals in ... 2.02 MB
21 October 2011
Reducing operational costs in high silica, 18,000M3/DAY BWRO in Arica, Chile
The desalination industry has significantly evolved in the last decade with 33million m3/day of additional desalination capacity now operating. One third is using membrane technology with 6,458 Reverse osmosis plants coming on-line. More than twice as many brackish.....
Reducing operational costs in high silica, 18,000M3/DAY BWRO in Arica, Chile
The desalination industry has significantly evolved in the last decade with 33million m3/day of additional desalination capacity now operating. One third is using membrane technology with 6,458 Reverse osmosis plants coming on-line. More than twice as many brackish.....
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Reducing operational cost... 487.41 KB
21 October 2011
Results from 99 seawater RO membrane autopsies
This paper presents results from 99 sea water reverse osmosis (SWRO) membrane autopsies carried out by the Genesys laboratory in Madrid from 2002 and outlines the technical issues surrounding fouling and scaling of sea water membranes. The authors.....
Results from 99 seawater RO membrane autopsies
This paper presents results from 99 sea water reverse osmosis (SWRO) membrane autopsies carried out by the Genesys laboratory in Madrid from 2002 and outlines the technical issues surrounding fouling and scaling of sea water membranes. The authors.....
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Results from 99 seawater ... 840.8 KB
11 September 2010
Paper presented by Silvia Gallego, at the Spanish Desalination and Water Reuse Association (AEDYR) Conference in Barcelona
This paper (in Spanish) explained the results achieved by using an advanced silica antiscalant at the Arica brackish water reverse osmosis plant in Chile...
Paper presented by Silvia Gallego, at the Spanish Desalination and Water Reuse Association (AEDYR) Conference in Barcelona
This paper (in Spanish) explained the results achieved by using an advanced silica antiscalant at the Arica brackish water reverse osmosis plant in Chile...
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Paper presented by Silvia... 878.37 KB
14 November 2009
Cost saving case study using a calcium sulphate specific antiscalant
Extensive extraction from aquifers often leads to deterioration in water quality. This is usually seen as
an increase in the soluble salt levels which, over time, has a detrimental effect on membrane
performance. A limiting factor...
Cost saving case study using a calcium sulphate specific antiscalant
Extensive extraction from aquifers often leads to deterioration in water quality. This is usually seen as
an increase in the soluble salt levels which, over time, has a detrimental effect on membrane
performance. A limiting factor...
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Cost saving case study us... 415.57 KB
18 August 2009
Cleaning Clay from fouled membranes
Within the lifetime of most reverse osmosis (RO) systems some fouling will adversely affect membrane
performance. The major constituents of foulants found on the first position during six years
of membrane autopsy at the Genesys Membrane laboratory are...
Cleaning Clay from fouled membranes
Within the lifetime of most reverse osmosis (RO) systems some fouling will adversely affect membrane
performance. The major constituents of foulants found on the first position during six years
of membrane autopsy at the Genesys Membrane laboratory are...
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Cleaning Clay from fouled... 2.16 MB
19 April 2009
The safe use of cationic flocculants with reverse osmosis membranes
Flocculants are used in combination with coagulants to agglomerate suspended particles for removal by filtration. This technique is used extensively...
The safe use of cationic flocculants with reverse osmosis membranes
Flocculants are used in combination with coagulants to agglomerate suspended particles for removal by filtration. This technique is used extensively...
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The safe use of cationic ... 1.47 MB
18 November 2008
Problems of operation and main reasons for failure of membrane in tertiary treatment systems
This paper presents and discuss the results of the long term operation and monitoring of membrane fouling at several full-scale MF/RO water recycling facilities operated by Agbar in Spain. It was demonstrated that membranes are...
Problems of operation and main reasons for failure of membrane in tertiary treatment systems
This paper presents and discuss the results of the long term operation and monitoring of membrane fouling at several full-scale MF/RO water recycling facilities operated by Agbar in Spain. It was demonstrated that membranes are...
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Problems of operation and... 563.74 KB
22 July 2008
Practical experience with high silica concentration in RO water
Silica chemistry is very complex. Silica can be found on the surface of reverse osmosis membranes in a polymeric or crystalline form...
Practical experience with high silica concentration in RO water
Silica chemistry is very complex. Silica can be found on the surface of reverse osmosis membranes in a polymeric or crystalline form...
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Practical experience with... 1.83 MB
22 February 2008
Innovations in the inhibition and cleaning of reverse osmosis mebrane scaling and fouling
Scaling and fouling of membranes are an on-going performance issue for most plants. This presentation outlines innovations in speciality chemicals designed to...
Innovations in the inhibition and cleaning of reverse osmosis mebrane scaling and fouling
Scaling and fouling of membranes are an on-going performance issue for most plants. This presentation outlines innovations in speciality chemicals designed to...
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Innovations in the inhibi... 1.67 MB
22 October 2007
Simple laboratory techniques to improve the operation of RO pre-treatment systems
Membranes failures are often caused by poor pre-treatment design and/or poor operation. Systems are frequently designed and built without a clear understanding of the chemistry of the feed water...
Simple laboratory techniques to improve the operation of RO pre-treatment systems
Membranes failures are often caused by poor pre-treatment design and/or poor operation. Systems are frequently designed and built without a clear understanding of the chemistry of the feed water...
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Simple laboratory techniq... 2.63 MB
06 October 2007
Theoretical and Practical experience of calcium phosphate inhibition in waste water RO plant
The increasing trend over the last ten years to use waste water as a feed source for reverse osmosis membrane plant has resulted in an increase in calcium phosphate scaling on membrane surfaces. This is due to...
Theoretical and Practical experience of calcium phosphate inhibition in waste water RO plant
The increasing trend over the last ten years to use waste water as a feed source for reverse osmosis membrane plant has resulted in an increase in calcium phosphate scaling on membrane surfaces. This is due to...
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Theoretical and Practical... 2.63 MB
Application Guides
07 December 2011
AG8 - BWRO Antiscalants
Phosphonates offer the best combination of scale inhibiting efficiency, metal ion sequestering and stability allowing reverse
osmosis plants to operate at higher recovery rates thus reducing pumping costs...
AG8 - BWRO Antiscalants
Phosphonates offer the best combination of scale inhibiting efficiency, metal ion sequestering and stability allowing reverse
osmosis plants to operate at higher recovery rates thus reducing pumping costs...
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AG8 - BWRO Antiscalants... 415.57 KB
10 September 2010
AG7 - Cleaning reverse osmosis (RO) and nanofiltration (NF) membranes
All RO/NF installations experience a degree of membrane fouling which will impact on operational efficiency and cost. The consequences of fouling include a decrease in production, increased differential pressure and or a decrease in permeate quality. In practical terms cleaning frequency and duration increases...
AG7 - Cleaning reverse osmosis (RO) and nanofiltration (NF) membranes
All RO/NF installations experience a degree of membrane fouling which will impact on operational efficiency and cost. The consequences of fouling include a decrease in production, increased differential pressure and or a decrease in permeate quality. In practical terms cleaning frequency and duration increases...
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AG7 - Cleaning reverse os... 909.09 KB
07 December 2011
AG6 - Biofouling control of RO membranes during operation & shut down
Correct preservation of off-line systems is vital to ensure that membranes do not degrade during prolonged shut down and that the system is not repopulated on restart...
AG6 - Biofouling control of RO membranes during operation & shut down
Correct preservation of off-line systems is vital to ensure that membranes do not degrade during prolonged shut down and that the system is not repopulated on restart...
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AG6 - Biofouling control ... 1.01 MB
07 December 2011
AG5 - Genesys CAS Calcium sulphate antiscalant
Genesys CAS antiscalant allows brackish water reverse osmosis (BWRO) with high sulphate feed waters to operate at higher recovery rates than with conventional antiscalant products or acid dosing. The following case study demonstrates significant savings in water and electricity due to reduced pumping requirements as a consequence of applying a speciality antiscalant product...
AG5 - Genesys CAS Calcium sulphate antiscalant
Genesys CAS antiscalant allows brackish water reverse osmosis (BWRO) with high sulphate feed waters to operate at higher recovery rates than with conventional antiscalant products or acid dosing. The following case study demonstrates significant savings in water and electricity due to reduced pumping requirements as a consequence of applying a speciality antiscalant product...
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AG5 - Genesys CAS Calcium... 1004.8 KB
28 March 2009
AG4 - RO Pre-treatment - safe use of cationic flocculant
Genefloc GPF is a membrane compatible low dose, poly amine cationic flocculant. The effectiveness of cationic flocculants is well known but due to the perceived danger of membrane fouling they are not widely used. This paper dispels some of the myths...
AG4 - RO Pre-treatment - safe use of cationic flocculant
Genefloc GPF is a membrane compatible low dose, poly amine cationic flocculant. The effectiveness of cationic flocculants is well known but due to the perceived danger of membrane fouling they are not widely used. This paper dispels some of the myths...
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AG4 - RO Pre-treatment - ... 1.12 MB
24 March 2009
AG3 - Alternative Autopsy Techniques
Comprehensive studies of membrane autopsy results show that 60% of failures tested in the Genesys laboratory are caused by poor pre-treatment design and/or poor operation. Alternative cost-effective autopsy techniques allow us to optimise re-treatment dosage and design specific membrane cleaning programmes based on accurate deposit identification...
AG3 - Alternative Autopsy Techniques
Comprehensive studies of membrane autopsy results show that 60% of failures tested in the Genesys laboratory are caused by poor pre-treatment design and/or poor operation. Alternative cost-effective autopsy techniques allow us to optimise re-treatment dosage and design specific membrane cleaning programmes based on accurate deposit identification...
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AG3 - Alternative Autopsy... 1.12 MB
12 March 2009
AG2 - Clay deposit removal from membranes
Genesys membrane laboratories in Madrid show that the majority of deposits found on reverse osmosis membranes are clay based aluminosilicates. These deposits are difficult to remove with traditional cleaning chemicals, Genesol 703 is a speciality membrane cleaning chemical designed to effectively remove these and other deposits reducing membrane cleaning frequency and associated costs. Results of cleaning trials on actual membranes are presented...
AG2 - Clay deposit removal from membranes
Genesys membrane laboratories in Madrid show that the majority of deposits found on reverse osmosis membranes are clay based aluminosilicates. These deposits are difficult to remove with traditional cleaning chemicals, Genesol 703 is a speciality membrane cleaning chemical designed to effectively remove these and other deposits reducing membrane cleaning frequency and associated costs. Results of cleaning trials on actual membranes are presented...
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AG2 - Clay deposit remova... 930.62 KB
06 March 2009
AG1 - WWRO Antiscalant replaces acid dosing
Genesys PHO has been found to reduce or eliminate the need for acid dosing in high phosphate reverse osmosis feed waters, such as surface and tertiary effluent, while controlling the potential for calcium phosphate scale deposition...
AG1 - WWRO Antiscalant replaces acid dosing
Genesys PHO has been found to reduce or eliminate the need for acid dosing in high phosphate reverse osmosis feed waters, such as surface and tertiary effluent, while controlling the potential for calcium phosphate scale deposition...
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AG1 - WWRO Antiscalant re... 1.18 MB
