Energy, Fouling, Virginia, Reverse Osmosis, Algae
Singapore's PUB draws curtain on algae
Singapore's national water agency PUB has for the first time installed silt curtains at the waters off Tuaspring and Singspring desalination plants, to protect them from damaging fouling of their reverse osmosis membranes by mounting levels of algae in the water.
RO-based advanced treatment plant for West Virginia mines
A 5 MGD (19,000 m³/d) membrane-based wastewater treatment plant is to be built to serve a number of coal mines in West Virginia, USA, as a result of government action following pollution violations.
Pressure-exchanger court case goes to Hauge
The latest round of the "pressure-exchanger wars" between inventor Leif J Hauge, his company Isobarix Inc and energy-recovery equipment manufacturer Energy Recovery Inc (ERI) has gone in favour of Hauge.
Algae biomass membrane order for Denmark's LiqTech
Denmark's LiqTech International Inc has received a purchase order of around US$ 300,000 for a prototype filtration system to be used in an algae biomass project.
AMTA and SEDA to hold Chesapeake membrane workshop
The American Membrane Technology Association (AMTA), which promotes membrane processes for desalination and water / wastewater treatment, is to hold a joint technology transfer workshop with the Southeast Desalting Association in Chesapeake, Virginia, in May 2013.
Ras Al Khaimah seawater desalination has algae shield
Northernmost of the United Arab Emirates (UAE), Ras Al Khaimah, has opened a 68 Ml/d seawater reverse osmosis (SWRO) project in Ghallilah on the emirate's west coast that is equipped to "overcome the red tide phenomena" - the seasonal proliferation of algae that blights the emirates' coastline.
Saudi boost for LiqTech ceramic membranes
The Saudi Arabian Ministery of Water & Electricity has announced that ceramic flat-sheet membranes are the technology of choice for groundwater applications, according to Danish company LiqTech International.
2014 Oman conference to look at HABs and desalination
An international conference on Harmful Algal Blooms (HABs) & Desalination is to be held in Muscat, Oman, in April 2014.
Korean membranes chosen for Iranian process water
CSM fouling-resistant reverse-osmosis membranes, manufactured by Woongjin Chemical of South Korea, have been selected for the Fajr Phase II Project in Iran to help reduce biological fouling and scaling.
SEDA to hold events in Chesapeake and Pompano Beach
The Southeast Desalting Association has announced a Membrane Cleaning Workshop to be held in Chesapeake, Virginia, in late October 2013.
SEDA offers first module of membrane operator certificate
The Southeast Desalting Association (SEDA) is offering Module I of the Membrane Operators Certification (MOC) Short School in April 2013 in Palm Coast, Florida.
H2O Innovation commissions pathfinding Indian membrane plant
Canada's H2O Innovation announced on 31 January 2011 that its Indian joint venture, H2O Innovation India Ltd, had commissioned the 7,000 m³/d membrane water treatment system it had designed for Larsen & Toubro Heavy Engineering (L&T) in Gujarat state.
Live Webinar Masterclass - Membrane Fouling Control
The first in a series of Desalination and Water Reuse Masterclass webinars will run on 12 February this year. Each event will offer practical, readily applicable guidance delivered by an expert in the topic covered.
Researchers uncover new membrane fouling mechanism
Researchers have uncovered "an additional reverse osmosis (RO) membrane fouling mechanism" arising from organic compounds present in ultrafiltration (UF) permeate during wastewater desalination.
SEDA to hold May Day membrane cleaning workshop
The Southeast Desalting Association is holding a workshop in Cape Coral, Florida, on 1 May 2014 focused on reverse osmosis (RO) membrane cleaning.
Hauge and Isobarix cleared of contempt of court
The US District Court for the Eastern District of Virginia* on 20 March 2014 cleared Leif Hauge and his energy-recovery device company Isobarix of contempt of court in a case brought by Energy Recovery Inc (ERI).
SEDA December workshop to look at chemicals for RO
The Southeast Desalting Association (SEDA) has announced a technology transfer workshop on Chemical Treatment for Reverse Osmosis (RO) to be held in Palm Bay, Florida, in December 2013.
Evoqua lands five deals totalling US$ 20 million for its clarification system
In deals totalling more than US$ 20 million, five US municipalities have ordered Evoqua Water Technologies' BioMag ballasted biological treatment system for their wastewater treatment plants.
Melbourne researchers' anti fouling membrane claim
Researchers from the Melbourne School of Engineering at the University of Melbourne have developed what they claim to be an anti fouling microfiltration system that outstrips existing technology on energy efficiency with negligible compromise on performance.
WaterReuse awards recognise people and projects
The WateReuse Association has unveiled its annual award winners of people and projects that have made significant contributions to water reuse.
MIT membrane start-up completes funding round
The conclusion of an initial round of funding for Clean Membranes Inc, a start-up company based in Lexington, USA, will permit progress on development of a new generation of non-fouling membranes usable for sea and brackish water desalination.
How we delivered Az Zour North phase one
"With hindsight we were very lucky to get everything through on time and that our construction partner Hyundai Heavy Industries was on time. Fortunately we escaped a lot of those little wrinkles that need sorting out during construction, and can drag on and on, and so we kept to time," says Andy Biffen, chief executive of project delivery vehicle Az Zour Shamal.
Evoqua bags municipal deals worth US$ 20 million
Water treatment firm, Evoqua, has won contracts worth more than US$ 20 million supplying its Memcor microfiltration and ultrafiltration product line to six US and Canadian municipalities. The deals were for filtration, water reuse, drinking water treatment, and reverse-osmosis pre-treatment applications.
Nanobubble specialist Moleaer raises capital, seeks people
Moleaer, the California, US-based water technology firm that developed the XTB Nanobubble Generator has raised $6 million to support overseas expansion.
Nearly 200 abstracts received for AMTA/AWWA conference
The American Membrane Technology Association (AMTA) says that 193 abstracts have been received for its joint conference next year with the American Water Works Association (AWWA) in San Antonio, Texas.
Suez Environnement lands US$ 200 million Middle Eastern deals duo
Suez Environnement has won a desalination contract in Abu Dhabi worth more than US$ 180 million and a separate water reuse deal in Oman taking the total value of the Middle East wins to more than US$ 200 million.
AWA to hold membrane fouling master class
Membrane fouling is to be the subject of a master class to be held by the Australian Water Association (AWA) in November 2012.
GE expands HERO licensing agreement
GE Power & Water announced on 1 February 2011 that it has completed a new expanded licensing agreement to allow it to continue offering High Efficiency Reverse Osmosis (HERO) systems to help more of its industrial customers increase their water usage efficiency and reuse capacity.
EDS posts desalination courses for early 2011
The European Desalination Society has posted a half-year series of courses on its website for 2011 related to water desalination and membrane technology. All the courses will take place in Pegli, close to Genoa, Italy, at the Hotel Mediterranée.
EDS adds SDI Workshop to Barcelona events
The European Desalination Society has added a workshop on the Silt Density Index to the satellite events around its upcoming Barcelona conference, the society confirmed in an announcement on 12 March 2012.
Singapore setting for Desalitech pilot plant
A 200 m³/d pilot reverse-osmosis (RO) water treatment unit is to be set up in Singapore by Desalitech Ltd under a contract from a client who has yet to be named.
Parsons lands SAWS brackish water desalination job
Parsons Corporation is leading a joint venture to serve as the construction manager at risk for the San Antonio groundwater desalination program in Texas, USA.
ERI Q Series chosen for Acciona project in Chile
Spanish contractor Acciona Agua has chosen Energy Recovery Inc (ERI) energy-recovery equipment for its contract for the Minera CAP expansion desalination project in the Copiapó Valley in Chile's Atacama Region III, ERI announced on 16 July 2013.
Electrochemical desalination MoU signed in Singapore
A memorandum of understanding (MoU) between Singapore's national water agency, PUB, and Evoqua Water Technologies to further develop electrochemical desalination technology was one of five MoUs signed during Singapore International Water Week, which ended on 5 June 2014.
Abunayyan resigns as chair of ACWA Power Barka
Mohammad Abdullah Abunayyan has resigned as chairman and board director of ACWA Power Barka in Oman, citing personal reasons.
Algae: a tide of trouble
The water services provider at the industrial port at Sohar in the Oman has learned the hard way, how to combat the seasonal algal wave that can grind vital reverse osmosis desalination and other water treatment to a halt. Despite unprecedented assaults the notorious Red Tide has been tamed. This article first appeared in the May 2015 issue of Desalination & Water Reuse magazine.
Spiral scoops innovation award for its 'disruptive' automatic self-cleaning filter
Spiral Water has picked up an Innovation Award from BlueTech Research for its automatic self-cleaning water filter, a "disruptive" new filter technology according to Spiral chief executive Ashwin Gulati.
Fisia Italimpianti and partners secure Oman desalination project
Fisia Italimpianti in a consortium led by ACWA, with Veolia, and Dhofar International Development and Investment, and in a joint venture with Abengoa, has won a $100 million contract for a reverse osmosis desalination plant to serve Salalah city in southwest Oman.
Modern Water claims first FO commercial desalination contract
UK-based Modern Water has won what is believed to be the first ever forward-osmosis (FO) commercial contract for desalination, following its award of a UK£ 500,000 (US$ 810,000) contract for a 200 m³/d plant by Oman's Public Authority for Electricity & Water (PAEW).
EDS publishes desalination courses line-up for 2013
Five courses for the first half of 2013 have been announced by the European Desalination Society (EDS). All except one will be staged in Genoa, Italy.
IDA releases more Congress details
More details have been released about the program for the 2009 World Congress of the International Desalination Association (IDA), which will take place during 7-12 November 2009 in Dubai.
Jack August to give AWWA/AMTA keynote speech
Dr Jack L August Jr, historian and executive director of the Barry Goldwater Center for the Southwest and visiting scholar in legal history at Snell & Wilmer LLP will be keynote speaker at the AWWA/AMTA Membrane Technology Conference & Exposition, which opens in Pheonix, Arizona, next week.
Three desalination workshops follow IDA World Congress
Three different aspects of desalination will be covered in workshops announced on 10 September 2009 by the International Desalination Association (IDA), which will follow its upcoming World Congress in Dubai.
Desalination using forward osmosis with nanofiltration membranes
Forward osmosis (FO) is an emerging membrane technology, often used for desalination. Like reverse osmosis (RO), FO uses a semi-permeable membrane to separate water from dissolved solutes. The semi-permeable membrane acts as a barrier that allows water to pass through while blocking salts. Generally, any dense, non-porous, selectively permeable material can be used as a membrane for FO. Professor Chung invented a novel polybenzimidazole (PBI) nanofiltration (NF) membrane with a narrow pore size and high flux for the FO process. PBI was chosen mainly because of its robust mechanical strength and excellent chemical stability. However, at high ionic strength (normal in FO applications) and normal operational pH values, the charge of the membrane surface is neutral, leading to a decrease in electrostatic repulsion between the membrane surface and electrolytes to be rejected. Consequently, monovalent salts rejection decreases. Ideal NF membranes for FO would be highly negatively charged at most pH values. Additionally, these membranes are hydrophobic and have a propensity to foul during operation. Therefore, this collaboration is performing research to improve the separation performance of the PBI FO membrane by (1) lowering membrane fouling via chemical modification, and (2) increasing its monovalent salt-rejection via membrane surface modifications. Since these properties are given to a porous PBI NF membrane instead of the conventionally used dense RO membranes, this project has the potential to revolutionize the field of desalination using FO. Development of a desalination process technology using the FO route has the potential to achieve up to a 75% decrease in costs and energy consumption in desalination, in comparison with conventional thermal or RO processes. This technology is still undergoing research. Acknowledgments The source of funding was the National Science Foundation, NSF OISE 0832894. This article appeared in D&WR magazine's May/June 2009 issue.
Pretreatment course scheduled by EDS for May 2010
The European Desalination Society (EDS) on 15 January 2010 announced a four-day course on Pretreatment, membrane fouling and scaling to be held in Genoa, Italy, on 31 May - 3 June 2010.
AdVE desalination pilot plant approved for Laredo
A 50,000 gpd (190,000 L/d) advanced vapor compression desalination (AdVE) pilot plant is to be constructed and operated for the City of Laredo, Texas. The City Council has approved a US$ 1.6 million joint proposal by Terrabon LLC and the Texas Engineering Experiment Station (TEES).
Researchers cast doubt on economics of osmotic power
New research findings have questioned the economics of power production from pressure retarded osmosis (PRO).
Desalitech recognised for topping water recovery rate records
Desalitech has won the IDA Industry Technology and Innovation Leader in Water Reuse and Conservation Award of Distinction, thanks in part to its work at Padre Dam Advanced Water Reclamation plant in Southern California.
EDS desalination course dates for 2012 published
The European Desalination Society (EDS) has published dates for its series of courses for 2012, which will take place in February, April and June.
The Long Read: Where's the innovation in brine treatment?
As water scarcity bites and the drive to recycle water grows, the focus on recovering clean water and other resources from brine is sharpening. The challenge is particularly pertinent for industrial operators.
Researchers share industry prize for fouling research
Doctoral students, Ariel Atkinson of the University of North Carolina at Chapel Hill and Erin Partlan of Clemson University, have received the 2014 Fellowship for Membrane Technology award from the American Membrane Technology Association (AMTA) and the National Water Research Institute (NWRI) for research in membrane fouling.
Dow project seeks to promote reuse
Dow Water & Process Solutions, is participating in one of ten European Commission-funded projects that aim to stimulate innovation and improve cohesion in Europe's water reuse sector.
Tubular membranes replaced at South Africa coal plant
More than 2,500 tubular reverse-osmosis (TRO) membrane modules have been replaced at a South African coal-to-liquids refinery by Veolia‑owned Membratek in a subcontract.
AMTA unveils annual gongs for membrane experts
The American Membrane Technology Association (AMTA) has conferred its annual roster of awards for membrane specialists, include its Lifetime Service Award, Hall of Fame Awards, and Operator of the Year Award.
Hydranautics introduces two new spiral wound RO membranes
Hydranautics has brought out two new spiral wound reverse osmosis membranes for demanding industrial and municipal applications.
IDA announces lecturers for next Academy session
The International Desalination Association (IDA) has announced the line-up for the next one-day course in its Desalination Academy, which will take place on 5 December 2012 in Jeddah, Saudi Arabia, alongside the Saudi Water & Power Forum.
AMTA elects Patel as president for 2012/13
Mehul Patel of the Orange County Water District was elected president of the American Membrane Technology Association (AMTA) for 2012/13 at the association's board meeting in Fairfax, Virginia, on 18 July 2012.
AMTA workshop to look at SCADA and PLCs
The American Membrane Technology Association (AMTA) is to hold a technology transfer workshop on SCADA/Instrumentation & Controls for Membrane Facilities in Fairfax, Virginia, on 17‑18 July 2012.
Interview: Kati Bell, Stantec global reuse leader
Canadian engineering giant Stantec acquired water business MWH Global for $795 million, back in 2016. Now that the dust has settled on the deal, how well is the integration of the two organisations proceeding, and as the global water reuse practice hits its stride, how could its work help to shape the water markets of the future?
M&G Chemicals to sell Texas desalination facility amid bankruptcy
M&G Chemicals is to sell a desalination facility at its unfinished resins factory in Corpus Christi, Texas, as part of a wider divestiture, reports ICIS.
Don't let climate uncertainty stymie desalination investment says risk expert
Water and wastewater utilities must view climate change as a "disruptive opportunity" and not allow uncertainty to stymie investments in desalination and other resilience measures according to a UK risk management expert. Climate change created a business opportunity where "the most resilient will have an implicit lead over their competitors," the expert told a recent international forum.
CH2M reuse promotion drive picks up Stockholm prize
Colorado-based service and engineering company, CH2M, has won the 2015 Stockholm International Water Institute's (SIWI's) Stockholm Industry Water Award, for developing and advancing methods to clean water and increasing public acceptance of recycled water.
New clarifier solves Virginia UF membrane problems
Funds from the US Environment Protection Agency (EPA) have enabled completion of a new pretreatment system for an ultrafiltration membrane system at the Fairmont Water Filtration Plant in West Virginia.
Xylem supplies wastewater denitrification systems in China
Water technology company, Xylem, has supplied denitrification systems to three wastewater treatment plants in eastern China as part of a national strategy to improve wastewater treatment by 90% over five years.
Direct membrane filtration simplifies reuse process
Recent trials have proven that direct membrane filtration of high solids (algae) and disinfection provides a simpler treatment process with substantial cost reduction. In Pillbara, Australia, two plants are being constructed to treat wastewater for recycling aiming for a 4-log removal of bacteria and viruses by filtering alone. Ultraviolet treatment provides the final requirement to reach the required 6-log removal rate. This article gives an overview of the application, and details on the technology and design used. It first appeared in the August/September 2013 issue of Desalination & Water Reuse magazine.
HTI deal takes forward osmosis to China
The world's only commercial manufacturer of forward-osmosis (FO) membranes, modules and systems, Hydration Technologies Innovations LLC (HTI), reached an international distribution, services and cooperation agreement for FO technology with Chinese company Tri-Tech Holding Inc.
First MOT plant produces water in Gibraltar
The first desalination plant to employ Manipulated Osmotic Technology (MOT) has produced its first water in Gibraltar. Modern Water, the UK company that installed the plant, also announced on 15 September that it has an agreement to install another MOT plant in Oman.
Pilot vapour-recompression plant tackles oil and gas water
A pilot project to treat produced water from oil and gas operations in southern Saskatchewan, Canada, has been initiated by Purestream Technology of Salt Lake City, USA, using its advanced vapour recompression (AVARA) system.
MBR upgrades mean less maintenance and longer life
In recent years, MBR membranes have evolved to the point where they require less maintenance and at the same time have a longer useful life. An added benefit comes from the more advanced designs that consume significantly less energy and lower operating costs. The new Puron module from Koch Membrane Systems Inc (KMS) is a second generation MBR membrane module that employs hollow fibers. Like several other second generation membranes, the high-strength fibers that comprise the Puron modules also overcome the fiber breakage problems typical of first generation systems that use non-braided fibers. Second generation systems position the membrane bioreactor industry for even more rapid growth. They offer several advantages, including improved performance in terms of reduced fouling and lower energy consumption. They are also more robust than first generation systems and are usually designed with compatibility in mind to minimize retrofitting costs. This article appeared in D&WR magazine's August/September 2008 issue.
IDE wins brackish water desal plant contract in Israel
IDE Technologies has won a project to build and operate a brackish water reverse osmosis (BWRO) plant in Emek Hamainot, Israel.
Measuring seawater and brine salinity in seawater reverse osmosis
In 2007 and 2008, Desalination & Water Reuse published a brace of articles on the subject of membrane fouling evaluation using the Silt Density Index and the Modified Fouling index. One of those authors addressed the IDA Congress in Perth in September 2011 on work she has been doing since then looking at salinity and total dissolved solids. She has updated and abbreviated that paper for D&WR. This article first appeared in the November/December 2011 issue of Desalination & Water Reuse magazine.
IDA lifetime achievement award for Toray's Kurihara
A lifetime achievement award to Dr Masaru Kurihara of Toray Membranes was awarded by the International Desalination Association at its awards banquet which closed the IDA World Congress in Perth, Australia on 8 September 2011.
Video Q&A: Ronit Erlitzki, AdEdge Water Technologies
AdEdge Water Technologies' director of business development Ronit Erlitzki, presents a new technology that uses flow reversal to minimise membrane fouling.
First guide to harmful algal blooms launches at IDA World Congress 2017
UNESCO Intergovernmental Oceanographic Commission (IOC) and Middle East Desalination Research Centre (MEDRC) introduced the world's first guide to harmful algal blooms (HABs) on Tuesday 17 October 2017, at IDA World Congress.
Toray to set up desalination/reuse R&D lab in Singapore
The establishment of Toray Water Technology Laboratory (TWTL) in Singapore to conduct research and development of water treatment technologies was announced by Toray Industries Inc on 24 June 2009. The Nanyang Environment & Water Research Institute (NEWRI) at Nanyang Technological University (NTU) will be Toray's partner for its research activities in Singapore.
IDA 2015 World Congress draws 1,700 delegates
More than 1,700 delegates from 63 countries attended the International Desalination Association's (IDA's) 2015 World Congress held in San Diego recently according to the association's key metrics published this week. Awards for papers and presentations topped US$ 30,000.
Combining Forward Osmosis with Reverse Osmosis
A combination of forward osmosis with reverse osmosis could facilitate the treatment of some high fouling wastewaters. The system uses brine to draw water from the wastewater without high pressure or turbulence. Key element is the membrane's ability to allow rapid passage of water without much internal concentration polarization. The diluted draw solution can then be desalinated by reverse osmosis. The Two-Way Osmosis or TWO system may also be usable in very remote areas, where seawater ponds can be built for evaporative recovery of salt. Catalyx is designing a pilot system (patent pending) to desalinate seawater without external electric power. This article was published in the May/June 2009 issue of Desalination & Water Reuse.
Antiscalant removes need for acid in wastewater RO
Field trials of a new scale-inhibiting chemical for use with reverse-osmosis membranes in wastewater reuse plants show that, at a low dose rate, it can increase the solubility of calcium phosphate by over one hundred times, obviating the need for using dangerous and costly acid. Current design practices for large effluent reuse projects are focused on a combination of removing phosphate by precipitation prior to the RO plant and acid dosing to reduce pH to 6.0 and hence increase calcium phosphate solubility to prevent fouling. Conventional antiscalants are ineffective at high phosphate and high recovery rates, and the only other option has been to dose large quantities of acid to reduce feed pH to below 6.2. Reducing the pH from 7.5 to 6.0 on a 2,700 m /day plant would require 0.5 to 1 ton of 95% sulphuric acid per day. Handling this quantity of acid is an environmental, health, safety and logistical problem that many plant operators would like to move away from. The results from the field trials show that using a highly active threshold inhibiting antiscalant such as Genesys PHO at a low dose rate of 2 -5 mg/L can increase the solubility of calcium phosphate by over one hundred times. This article appeared in D&WR magazine's August/September 2008 issue.
Conwed in feed spacer study
Plastic netting maker, Conwed, has provided its products for a study into options for developing and testing of feed spacers in reverse osmosis (RO) by numerical modelling, three- dimensional (3D) printing of feed spacers and experimental membrane fouling simulator studies.
Desalitech wins zero liquid deal in China
Desalitech has won a deal to supply a high-efficiency, ultrapure water treatment system for Novelis' aluminium production facility in Changzhou, China to help comply with a regulatory requirement for zero-liquid discharge (ZLD) in applicable process wastewaters.
USBF/MBR system allows Canadian wastewater reuse
A wastewater treatment plant (WWTP) expansion featuring an upward sludge blanket filter (USBF) combined with a membrane bioreactor (MBR) has been completed at Snug Cove on Bowen Island in British Columbia, Canada.
AMTA NEWS Novel sub-nanofiltration ceramic membrane production uses DNA
A novel method for creating ceramic reverse osmosis membranes with sub-nanometre pores by using the genetic material, DNA, as a template former, overcomes the poor reproducibility encountered in conventional methods according to the developer of the technology, Cerahelix.
Microbubble membrane cleaning stems fouling
In spring 2014 we published an article on how Genesys developed its microbubble-based membrane cleaning system. In this follow up Genesys presents results from a case study of the technology in a wastewater reverse osmosis plant. This article first appeared in the February 2015 issue of Desalination & Water Reuse magazine.
Kuwait plant to get GE membranes
Kuwait's Sulaibiya wastewater treatment and reclamation plant will be upgraded with GE's water reuse technology.
IDE/Clean Harbours tie-up aims at oil sands clean-up
Desalination designer and constructor IDE Technologies Ltd and US waste and wastewater specialist Clean Harbors today announced a joint research and development (R&D) program to increase the availability and reliability of mechanical vapor compression (MVC) evaporators for treating oil sands produced water in Alberta, Canada.
Membrane market growth to run until 2020
The fruits of growing research and development in forward osmosis for desalination are highlighted in a recent sector report as drivers of growth in the market for membrane separation technologies running to at least 2020.
A grand conference is AMTA/ AWWA's fourth
One thousand attendees turned up at Orlando, Florida for the fourth Membrane Technology Conference (MTC) hosted jointly by the American Water Works Association (AWWA) and American Membrane Technology Association (AMTA) last week.
IWA extends deadline for Toronto membrane papers
The International Water Association (IWA) has extended the deadline for submission of papers for the 7th IWA Specialised Membrane Technology Conference & Exhibition for Water & Wastewater Treatment & Reuse.
Nine desalination studies bag US$ 1.4 million funding
Nine research projects and pilot studies will share US$1.4 million in funding under a desalination and water purification research programme set up by the US Bureau of Reclamation.
Why MFI is edging SDI as a fouling index
PARTICULATE FOULING has plagued reverse osmosis (RO) systems since their first use in desalination and remains a persistent issue today for RO and other pressure-driven systems such as microfiltration (MF), ultrafiltration (UF) and nanofiltration (NF). In the early 1960s, the Du Pont company/Permasep Product successfully launched the hollow-fine-fibre (HFF) permeator onto the desalination market, where it dominated for several decades. A well-known weakness of this permeator was its vulnerability to fouling. Initially, this vulnerability was attributed to suspended and colloidal matter in the feed water, ie, particulate fouling. Therefore, Du Pont developed, the Silt Density Index (SDI), initially named the Fouling Index, as a parameter to characterize the fouling potential of the feedwater for permeators. The fouling mechanism turned out to be more complicated than just fouling of the membrane surface as initially assumed. Gradually it became clear that the fouling was initiated by local clogging of the woven or non-woven fabric between the fibres, which is needed to ensure equal flow distribution of the feed water (see Figure 1). This article first appeared in the issue of Desalination & Water Reuse magazine.
EDS lists desalination courses for 2013
The European Desalination Society (EDS) has released a complete list of its courses for 2013. EDS has been giving training certificates since 2003 to over 400 participants from all over the world.
4th Membranes & Desalination event set for Gold Coast
The Membranes and Desalination Specialty IV Conference, to be held in Gold Coast on 11-12 February 2011 by the Australian Water Association, has a problem solving focus.
Masterclass webinar to look at combining reuse and desalination using forward osmosis
Award-winning researcher, Gaetan Bandin, will present the next Desalination and Water Reuse Masterclass Webinar on 30 June looking at opportunities and challenges for forward osmosis and pressure assisted osmosis (PAO) to combine water reuse and desalination.
Registration open for WateReuse research conference
Registration is open for the 18th Annual Water Reuse & Desalination Research Conference to be held by the WateReuse Research Foundation in Las Vegas on 19-20 May 2014.
North Sea gas RO package supplied by UK company
A containerised reverse‑osmosis (RO) desalination package is to be supplied for an unmanned gas platform in the North Sea by Salt Separation Services of Rochdale, UK.
Four workshops to precede AMTA / AWWA conference
There are now four preconference workshops prior to the Membrane Technology Conference & Exposition being held by the American Membrane Technology Association (AMTA) and the American Water Works Association (AWWA) in San Antonio, Texas, at the end of February 2013.
Two workshops ahead for SEDA in January
The Southeast Desalting Association (SEDA) is holding two technology transfer workshops in Florida at the end of January 2013.
EDS launches 2014 desalination courses with Rome event
The European Desalination Society (EDS) kicks off a list of six events in its series of Master Courses with a three-day course in Rome, Italy, on Membrane Technology, Process & System Design on 3‑5 March 2014.
RO included in Czech powerplant water treatment upgrade
Wabag Brno has begun modernisation of the water treatment plant at the Prunéřov power station in the Czech Republic, involving clarification, filtration, reverse osmosis, softening and demineralisation.
Desalination affected by California powerplant ruling
The powerplant with which California's new 189,000 m³/d Carlsbad seawater reverse-osmosis (SWRO) plant is co-located has been ordered to cease once-through cooling by 2017. The Huntington beach powerplant, site of another proposed desalination plant, has been given until 2020.