Forward Osmosis, Reverse Osmosis, Monitoring, Monitoring, Reverse Osmosis, Malta


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Modern Water gets £ 9.5 million from share issue

UK forward-osmosis (FO) and monitoring specialist Modern Water plc announced on 12 February 2013 that it had raised, subject to certain conditions, £ 10.0 million (approximately £ 9.5 million net of expenses) by way of a placing of 20,000,000 new ordinary shares with both new and existing institutional shareholders at a price of £0.50 per ordinary share.

Modern Water set for first FO desalination plant in China

Modern Water is set to build a forward-osmosis (FO) desalination plant in Xugong Island, China, as a result of one of three deals signed by the UK company during a trade mission to China led by UK prime minister David Cameron.

Membrane 'summit' will precede AMTA conference

The 2nd Osmosis Membrane Summit will precede this year's annual conference of the American Membrane Technology Association (AMTA) in San Diego.

Yokogawa to provide control system for Jubail SWRO plant

Yokogawa Middle East & Africa has received an order from Petroleum, Chemicals & Mining Company Limited (PCMC) to supply the control system for the SWRO-4 desalination plant, which is being built in Jubail, Saudi Arabia, by the Power & Water Utility Company for Jubail & Yanbu (Marafiq).

RO consumes 4% of Malta's electricity, says new group

Reverse-osmosis desalination plants consume almost 4% of Malta's electricity supply, according to a statement from the newly-formed Malta Water Association (MWA) on 22 March 2011. The group, made up of hydrologists, engineers and other water experts, warned that urgent action is needed to protect Malta's water resources, which "are among the scarcest in the world and under severe stress."

IDA announces scholarship program winners

Students from Brazil and Singapore are this year's winners of the Channabasappa Memorial Scholarship awarded by the International Desalination Association (IDA).

Modern Water ties in with Chinese partner

UK forward-osmosis desalination developer Modern Water plc has signed a framework agreement with Hangzhou Development Center of Water Treatment Technology Company Ltd (Hangzhou Water) in China.

US research challenges value of forward osmosis in seawater desalination

Researchers in the US have claimed that forward osmosis desalination of seawater is significantly less energy efficient than reverse osmosis

Masdar picks four firms to test new desalination techniques

Abu Dhabi clean energy company, Masdar, has selected four international water technology firms to test techniques that could reduce the energy intensity of desalination and lead to a large renewably powered water purification station.

New tech to drive 9.5% annual desalination growth - report

By 2020, the annual supply of water from desalination will have reached 54 billion m³, according to a report released on 17 March 2009 by Lux Research.

TWO process to recover sodium sulphate from ion-exchange

California-based Catalyx Inc has signed a build-own-operate contract with RG Global Lifestyles Inc, which owns Catalyx Fluid Systems (CFS), for a brine dehydration system to facilitate recovery of sodium sulfate from ion-exchange regenerant brine.

Forward-osmosis patent filed by QuantumSphere

Another forward-osmosis process has taken a step forward. QuantumSphere Inc filed for a US patent on 14 January 2009 for its water purification process, which, it claims, serves as a more energy-efficient alternative to desalination methods now commonly used.

Desalination quartet booked for Masdar pilot plants in UAE

Three major contractors in the global desalination business - Abengoa, Degrémont and Sidem/Veolia - together with forward-osmosis developer Trevi Systems, were awarded contracts on 5 May 2014 by Abu Dhabi's Masdar, to each start the construction of a 1,500 m³/d desalination plant as part of Masdar's pilot project announced in 2013.

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.

Modern Water appoints US monitoring sales VP

UK-based Modern Water plc has appointed a vice president of sales, Americas, for its Monitoring division. This appointment will strengthen the geographical reach of the division and will drive Modern Water's sales activity in North, Central and South America.

California considering CEC monitoring in water reuse

The California State Water Resources Control Board is to consider adding monitoring of constituents of emerging concern (CECs) to its requirements for recycled water at its board meeting on 16 October 2012.

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.

Low-energy desalination trials delayed

Trials of four new energy efficient desalination systems from leading water technology players that could "revolutionise the industry" have been delayed from their summer 2015 start with October forecast as the date when all will be in pilot operation.

LACSD signs up Desalitech for chloride‑removal test

Desalination system developer Desalitech is to support a pilot project with the Los Angeles County Sanitation Districts (LACSD) to upgrade two Santa Clarita Valley wastewater treatment plants in order to meet state‑mandated chloride limits, the company announced on 2 October 2013.

Carollo selected for Texas DPR health check

Carollo Engineers has been selected by the Texas Water Development Board to carry out detailed public health analysis of the first direct potable water reuse (DPR) facility in the USA.

IDA launches reverse-osmosis certification program

The International Desalination Association (IDA) is to launch a reverse‑osmosis training certificate associated with its recently launched IDA Desalination Academy.

Agreement over failed Monterey desalination plan

Agreement was reached on 4 December 2012 on legal and monetary issues resulting from the failed Monterey Regional Desalination Project, which was abandoned earlier this year.

Proposals sought for membrane-integrity test method

The WateReuse Research Foundation has issued a Request for Proposals to create a method for testing the integrity of high-pressure membranes used for nanofiltration (NF) and reverse osmosis (RO) in water treatment and desalination.

MBR/RO at heart of PepsiCo reuse plant in Chile

A membrane bioreactor (MBR), reverse osmosis (RO) and ultraviolet (UV) disinfection are all part of a wastewater treatment and reuse plant upgrade being completed by Siemens Industry Automation Division for PepsiCo in Chile.

Carmine Ciccocioppo, general manager operations for Osmoflo, and Matt Reed, general manager mines and export, for OneSteel at the commissioning.

Osmoflo commissions 4,000 m³/d SWRO desalination plant

A 4,000 m³/d seawater reverse-osmosis (SWRO) desalination plant has been commissioned in Whyalla, South Australia, for steel manufacturer OneSteel.

Aquatech awarded SWRO plant in Ras Al Kaimah

Aquatech is to build a 15 MIGD (68,000 m³/d) seawater reverse osmosis (SWRO) desalination facility at Ghalilah for the emirate of Ras Al Khaimah, UAE.

The Brackish Groundwater National Desalination Research Facility in New Mexico would become a state-of-the art desalination research facility.

US bill seeks major desalination research expansion

US Senate hearings began on 10 March 2009 into a bill on the relationship between energy and water which could have wide implications for desalination research, both in the US and internationally.

Desalination worries for Hyflux in Libya

Singapore-based contractor Hyflux is "closely monitoring" the situation in Libya, where it is due to start work shortly on a 40,000 m³/d seawater reverse-osmosis facility under a contract awarded in November 2010 by the General People's Committee for Utilities (the Ministry of Utilities in Libya).

Commission warns Australia about gas-production wastewater

Handling the wastewater resulting from coal-seam gas (CSG) production in Australia is likely to require a precautionary approach that will demand innovation from water managers and planners, and significantly greater coordination with existing project approval processes, the National Water Commission warned in December 2010.

Permit sought for RO discharge to Great Salt Lake

A proposal from the Jordan Valley Water Conservancy District (JCWCD) in Utah, USA, to discharge reject brine from a 7-14 MGD (26,000-53,000 m³/d) reverse-osmosis desalination (RO) plant into the Great Salt Lake is out for public comment from 1 December 2010 as part of the permit process.

The facility site at SEA Lab

West Basin district dedicates desalination demo facility

California's West Basin Municipal Water District is nearing completion of its new desalination demonstration facility, following formal dedication of the plant on 12 November 2010.

Innovations in IDA Congress technical program

Round-table sessions and touch-screen availability of poster presentations will be used for the first time in the International Desalination Association's World Congress in Dubai on 7-12 November 2009, IDA announced on 19 October 2009.

IDA Fellowship winners from Iran and Japan

This year's winners of the International Desalination Association's Fellowship awards come from Iran and Japan, IDA announced on 27 April 2009.

Santa Cruz pilot desalination results in 3-4 months

The Water Department of the City of Santa Cruz (SCWD), California, USA, confirmed on 23 March 2009 that its year-long seawater reverse-osmosis (SWRO) pilot plant test will be ended in mid-April with a report due in June or July 2009.

Phase 1 of Palm desalination plants finished in Dubai

The first phase of a $ 120 million contract to build two identical seawater desalination plants on the Palm Jumeirah island development in Dubai, UAE, has been completed by ACWA Emirates LLC.

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.

Oasys forward osmosis concentrates in China

Massachusetts-based Oasys Water has claimed its recent contract to supply a forward osmosis brine concentrator to a fossil-fuelled power plant in China to be a world first.

Tunisia and Malta to share desalination expertise

Tunisia has signed an agreement with the Mediterranean island of Malta involving sharing of expertise on desalination plants.

Ceramic nanofiltration company gets big investor

ItN Nanovation AG, a start-up company in Saarbrucken, Germany, making nanofiltration ceramic products for the water industry, announced on 9 December 2010 a framework investment agreement with the US investment fund YA Global Master SPV Ltd, part of the Yorkville Group.

LG Chem bags five orders worth US$ 8 million

LG Chem has acquired new orders for water purification filters totalling US$ 8 million under exclusive deals with five desalination projects. The projects are at sites in Israel, Spain, Malta, Egypt and Mexico, the company said.

Modern Water opens new office in Shanghai

UK company Modern Water announced on 26 November 2013 the formation of Modern Water Technology (Shanghai) Co Ltd and the opening of its new office in Shanghai, China.

Dr Isabel Escobar

Escobar appointed as editor-in-chief of IDA journal

Dr Isabel Escobar of the University of Toledo, Ohio, USA, has been appointed by the International Desalination Association (IDA) to succeed Dr Jim Birkett as editor-in-chief of the IDA Journal of Desalination & Water Reuse.

Oasys furthers advance in China

US-based forward osmosis specialist, Oasys Water, has unveiled its latest advance in its bid to expand in China with its partner in the region, Beijing Woteer.

Dr Richard Stover pictured at a Japan Desalination Association forum in February 2011.

Stover leaves Oasys for Desalitech

Energy Recovery Inc (ERI) old boy Dr Richard Stover has joined Tel Aviv-based Desalitech, a company with a desalination process that does away with energy-recovery devices.

The Victorian Desalination Plant is located at the southerly most tip of Australia on the Bass Coast

AquaSure's Victorian Desalination Plant secures its first water order

The Victorian Desalination Project (VDP) is a mega-size seawater RO facility, able to produce up to 150 billion litres of water a year when running at full capacity. Located at the southerly most tip of Australia on the Bass Coast, it was procured by the Victorian State government from AquaSure, a joint venture of Degrémont (now Suez), Macquarie Capital, and Thiess (now Ventia), in 2009, for a capital cost of $3.5 billion.

GE Power's membrane bioreactor system, ZeeWeed, is installed at Co-op Refinery Complex, in Regina, Canada

GE Power water reuse solutions installed at refinery in Regina, Canada

GE Power is supplying water recycling technology to the Co-op Refinery Complex in Regina, Saskatchewan province, Canada, after new rules mandated that the refinery find a new water source.

Moore takes over engineering for Modern Water

Brian Moore has left Thames Water to become Modern Water's new engineering manager as part of the UK membrane desalination company's planned growth in its engineering department.

Aquatech installs Emirates desalination plant

Water and wastewater technology company, Aquatech, has installed a 60 Ml/d seawater reverse osmosis-based desalination plant at Ghalilah, in Ras Al Khaimah, the northernmost of the United Arab Emirates (UAE).

Membrana filtration curbs corrosion in Disney Shanghai cooling

Membrane manufacturer Polypore has supplied its Membrana ultrafiltration units for Shanghai Disneyland to curb corrosion in the resort's cooling water system.

Small FO desalination plant commissioned in Oman

A 200 m³/d forward-osmosis (FO) desalination plant has been commissioned by Modern Water at Al Najdah in the Al Wusta region of Oman.

Mott MacDonald absorbs Australasian water specialist

The Mott MacDonald consultancy group has taken in AWT, a specialist water technology and consulting company based in New Zealand and Australia.

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.

Buenos Aires membrane papers deadline 15 June

A deadline of 15 June 2012 has been set for papers for the International Water Association (IWA) 3rd Regional Conference on Membrane Technology.

Oasys deal to treat Texas produced water with FO

Oasys Water has struck an agreement with Houston-based Select Energy Services, LLC (SES), a leading provider of engineered water solutions to the oil and gas industry, for exclusive use of its forward osmosis (FO) technology in the Permian Basin in West Texas and New Mexico, USA.

GE's Muscat takes over as Oasys Water CEO

Former GE executive Bob Muscat has been appointed chief executive officer of Oasys Water, the US forward-osmosis desalination specialist.

FO pilot plant could follow HTI Dubai link-up

Forward-osmosis (FO) system manufacturer Hydration Technology Innovations LLC (HTI) has signed an international distribution, services and cooperation agreement for FO technology with Future Technologies LLC of Dubai. Future Technologies will distribute HTI's FO OsMem™ membrane technology for industrial applications.

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).

Tri-Tech planning forward-osmosis pilot plants

Chinese water and wastewater treatment company Tri-Tech Holdings announced on 13 May 2011 that its current plans include constructing and operating one or more forward-osmosis (FO) pilot units using technology licensed from Arizona-based Hydration Technology Innovations (HTI).

Control contract as GWRS expansion breaks ground

KDC Systems has been awarded a contract to install and/or integrate process control systems for the expansion of the membrane-based Groundwater Replenishment System (GWRS) for Orange County Water District, which broke ground on 17 January 2012.

Study shows novel heavy-metals-from-wastewater method

Scientists in Singapore and Saudi Arabia have reported a novel method for extracting toxic and valuable heavy metals from wastewater using forward osmosis (FO).

Woongjin backs Californian FO membrane‑maker

Korean membrane company Woongjin Chemical Company has signed an agreement with California startup Porifera Inc providing investment for the Silicon Valley company to develop, manufacture and commercialize forward osmosis (FO) membranes at high volume.

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.

China opens laboratory to drive forward osmosis development

A pairing of leading players in China's water and petrochemicals industries have launched a venture to develop forward osmosis in seawater desalination that they claim will: "open up a new way for zero liquid discharge (ZLD) in seawater desalination of seawater resources with low energy consumption."

Modern Water claims Oman success

Modern Water plc announced on 12 November that its desalination plant in Oman has been successfully commissioned and fresh water production has commenced.

Forward-osmosis companies launch international association

Four companies specializing in forward osmosis membrane technology launched the International Forward Osmosis Association (IFOA) on 7 April 2014.

IDE to design PRO power-generation pilot in Norway

The Norwegian renewable-energy company Statkraft has made an agreement for IDE Technologies to design and later purchase and construct a 2 MW osmotic power-generation pilot plant in close cooperation with Statkraft.

Dow to supply membranes for new Perth plant

Dow Water & Process Solutions is to supply FilmTec™ reverse osmosis (RO) elements for the Southern Seawater Desalination Plant (SSDP) outside Perth, Australia.

Chinese website and new director for Modern Water

UK forward-osmosis specialist Modern Water plc has recently appointed William Harvey as its director of strategy and new business development for its Membrane Processes division as well as its electrocoagulation products.

CaribDA, ERI and Dow back operator training

In co-operation with Energy Recovery Inc (ERI) and Dow Water & Process Solutions, the Caribbean Desalination Association is organising a two-day operator training program at the Westin Dawn Beach Resort in St Maarten on 17-18 September 2009.

The Gold Coast  seawater desalination plant in Queensland, Australia

Some Gold Coast desalination issues still unresolved

A large number of non-compliance issues relating to the Gold Coast seawater desalination plant in Queensland, Australia, have been listed in a letter sent on 2 July 2009 by Keith Davies, CEO of WaterSecure, who are taking over the project, to the Queensland Department of Infrastructure & Planning.

Oasys announces sales hook-up with oil & gas servicer

Forward-osmosis specialist Oasys Water announced on 12 December 2013 that it had recently signed an exclusive sales agreement with National Oilwell Varco LP (NOV), a leading global provider of equipment and services used in the oil and gas market.

The algal bloom hit Barka desalination expansion plants 1 and 2 in the Gulf of Oman

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.

Water scarcity is the biggest driver of water reuse, say respondents to our industry survey

Water reuse: a growing market of opportunity and challenge

Survey findings suggest a market with the technical expertise, innovative ideas, and will to service customers' water needs, while a lack of money, reluctance to take chances on new technology, and instances of poor governance present challenges.

The reverse osmosis pilot plant at Ras Abu Jarjur

Experience helps boost production and stability at Ras Abu Jarjur

Improving production with reduced expenditure could be the main targets of any desalination facility around the world. Such feats are being methodically achieved at Ras Abu Jarjur reverse-osmosis (RO) plant in Bahrain as a result of a series of improvements. Of the many available desalination techniques, RO was seen from the earliest days as a reliable and cost-effective technology and was therefore employed at Ras Abu Jarjur. From the huge quantity of groundwater (40 million m /year) extracted from borewells, potable water totalling 29 million m /year is produced. The other 30% of water is being rejected to the Arabian Gulf, which has a similar salinity level and higher temperatures. Trials are being carried out to extend the brine staging by one more stage from two to three for the ninth and tenth trains and from three to four for the first to eighth trains, as the reject water from the trains is already filtered, acidified, dosed with antiscalant and most importantly possessing the required pressure energy (minimum of 38 bar) to be used. This strategy would increase the overall water recovery by another 4.5%. By closely following the guidelines of the scaling indices, solubility product limits of potential scale-forming constituents in the water and various performance-monitoring tools, it would be possible to recover another 2% of the water. The full article first appeared in the November/December 2008 issue of D&WR magazine. The paper on which it was based was awarded the prize for Best Oral Presentation at the International Desalination Association World Congress in Maspalomas in 2007.

The new manual, Harmful Algal Blooms and Desalination: A Guide to Impacts, Monitoring, and Management, synthesizes knowledge from multiple case studies

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.

A generation of knowledge and experience in water is being lost as baby boomers retire

Is water in the grip of a skills crisis?

In an engineering-heavy sector such as water, it's a truism that well qualified people are thin on the ground. But is it more accurate to say that the global water industry in the grip of a skills crisis?

Two direct potable reuse projects are currently in operation worldwide, in Texas, US, and Windhoek, Namibia

The Long Read: Do we have the technology for potable water reuse?

Water reuse for drinking purposes is racing up the agenda in the US and elsewhere. Work to draw up new rules for potable reuse is advancing in states including California and Arizona, as well as in Canada and the European Union. Technologies are being piloted, and plants permitted.

The new desalination plant at Playas de Rosarito will be on the coast adjacent to the existing power station

Consolidated Water lines up Mexican mega-project

The Playas de Rosarito seawater RO desalination mega-plant project has been six years in the making. It began as a twinkle in Consolidated Water's eye even before Mexico had introduced its new public-private partnerships law, but the act's introduction in 2012 gave the project a clear structure for moving ahead.

Maltese desalination test-bed shows SalTec energy-recovery advantages

Throughout the desalination industry, plant operators are looking for long-term solutions with lower lifecycle cost because of the link between water costs and energy costs. In order to meet operators' demands and requirements, equipment manufacturers are investing considerable resources in the development of new technologies that will reduce energy costs. The Water Services Corporation in Malta is one example of a forward-looking operator of a seawater reverse-osmosis (SWRO) plant seeking to ensure the production of high-quality drinking water at an affordable price. Established in 1993 to produce and distribute potable water on the islands of Malta and Gozo, WSC has an annual production target of 35 million m to satisfy the needs of its 400,000 residents and in excess of one million tourists. With the drive to produce greater efficiencies and water quality WSC has taken an opportunity to investigate and monitor the potential of a new technology from KSB, the SalTec pressure boosting and energy recovery system. The SalTec DT pressure exchanger in combination with KSB's HGM RO high-pressure pump creates a highly attractive proposition for RO plant designers and operators. The SalTec DT system provides a nominal capacity of 250 m /h, giving it the capability to operate in plants with train sizes ranging between 4,400 m /d and 5,000 m /d of permeate at common recovery rates.

IDA World Congress on Desalination and Water Reuse will make a return visit to Dubai in 2019

IDA to return to Dubai for World Congress 2019

The International Desalination Association (IDA) is to return to Dubai, United Arab Emirates, for its World Congress in 2019, building on the earlier success of the IDA World Congress held in the emirate in 2009.

Qala village is at the eastern most point of Gozo Island, close to the main Maltese archipelago

Malta tenders Euro 10 million desalination project

The Water Services Corporation of Malta has issued a tender for a reverse osmosis plant at Hondoq Bay on the Island of Gozo.

Inventor of water technologies Marc Vergnet adjusts the controls on Osmosun, his new solar-powered reverse osmosis desalination system that does not use batteries or energy storage, chemicals, or grid supplies of electricity

Masdar desal pilot: the results so far

Masdar Clean Energy set a target for its pilot projects of one cubic metre of water for every 3.6 kilowatt hours of energy used. This is a particularly challenging target in the Persian Gulf, where salinity is very high, the water temperature is high, it's very shallow, and there's high organic matter.

Global demand for desalination to rise each year until at least 2020

Desalination capacity is expected to grow by 8 per cent annually to 140 million m3/d by 2020, new research shows.

Stover becomes Oasys vice-president of engineering

Rick Stover, whose exit from Energy Recovery Inc (ERI) was announced last week, joined Oasys, the developer of Engineered Osmosis™ systems for desalination, energy and resource recovery, as vice- president of engineering, on 19 January 2010.

‘Forward osmosis and high recovery reverse osmosis has been fascinating to follow.’ John Williams, Lanxess Sybron Chemicals

Five Minutes With: John Williams, global business development, membranes, Lanxess Sybron Chemicals

Returning to the membrane industry 'feels like a very comfortable transition', says Lanxess new business development hire John Williams

ERI to cooperate with Koreans on PRO for energy

Energy Recovery Inc (ERI) announced on 15 October 2013 that it has signed a mutual cooperation agreement with Seoul-based global company GS Engineering & Construction Corporation (GS E&C Corp), part of Korean conglomerate GS Group, to significantly advance osmotic power generation using ERI's PX Pressure Exchanger® technology.

IChemE forecasts more UK municipal desalination by 2050

By 2050, at least four municipal desalination plants and up to 800 smaller units could be providing water to UK households and industry.

Registration opened for next IDA Academy courses

The International Desalination Association has opened registration for the next IDA Desalination Academy courses in Singapore on 16‑19 September 2013.

The Oasys pilot plant

Oasys gets $10 million capital

Oasys, the Yale University forward-osmosis desalination start-up company, says that it has secured US$ 10 million in venture capital funding for production of a commercial unit in two years time, says the Boston Globe.

The water supplied will be used for agriculture and hydroelectric applications in Beit She’an valley, Israel

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.

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.

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.

Researchers cast doubt on economics of osmotic power

New research findings have questioned the economics of power production from pressure retarded osmosis (PRO).

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.

Singapore and Tianjin next IDA Academy venues

Singapore is the venue for the next course in the schedule of the International Desalination Association (IDA) Academy.

Cost, regulation and water scarcity are driving a shift in mindset toward resource recovery in brine treatment

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.

US researchers develop lean energy membrane-based system

Researchers at Humboldt State University, USA are developing a portable prototype pressure retarded osmosis (PRO) seawater desalination (SWRO) system that exploits the osmotic pressure differential between brine waste from SWRO and wastewater. In turn the system deploys the PRO energy in the SWRO.

Modern Water's pilot plant was housed in a 20-foot container

Modern Water signs first brine concentration deal after pilot

Modern Water has secured the first sale of its proprietary All-Membrane Brine Concentration (AMBC) technology, to a textile dyes company in India.

Japanese desalination forum program announced

The program has been announced for the Japan Desalination Association (JDA) 2011 Forum in Tokyo on 16 February 2011.

IDA is seeking original work for its 2018 International Conference on Water Reuse and Recycling

IDA issues final call for papers for upcoming reuse conference

The International Desalination Association (IDA) has issued a final call for abstracts for its 2018 International Conference on Water Reuse and Recycling, 24 to 27 June, in Valencia, Spain.


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