Denmark, Fouling, Virginia, Reverse Osmosis, Algae


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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.

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.

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.

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.

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.

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.

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.

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.

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.

LiqTech lands follow-up membrane order from China

LiqTech International Inc of Denmark has received an additional purchase order for its silicon carbide (SiC) membranes from RIPE (Huzhou), a Chinese membrane system integrator.

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.

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.

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.

Finn Helmer appointed CEO of LiqTech International

Denmark's LiqTech International Inc, manufacturer of silicon carbide membrane filtration technologies, announced the appointment of Finn Helmer as its new CEO on 27 March 2013.

LiqTech ties up oil & gas agreement with FMC

Denmark's LiqTech International Inc announced on 25 March 2013 that it had entered into an agreement with US oilfield equipment and services company FMC Technologies Inc for the use of LiqTech's silicon-carbide membrane technology for oil & gas applications.

Danes launch biomimetic separation/sensing platform

A DKK 45 million (US$ 8 million) development platform has been launched in Denmark to explore and demonstrate the potential of industrial-scale biomimetic separation and sensor applications.

US ceramic membrane company expands to Singapore

Ceramic filter-maker LiqTech International Inc of Nevada, USA, announced on 17 January 2012 the opening of an expansion office in Singapore.

Denmark's Aquaporin in US$ 10 million Chinese joint venture

Chinese water treatment company, Heilongjiang Interchina, has signed a memorandum of understanding with Danish water purification specialist Aquaporin and Chinese environmental engineering company Poten Environment Group to set up joint venture in China.

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.

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.

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.

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.

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.

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).

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.

New head announced for Danfoss high-pressure systems

Developing Danfoss' small desalination systems will be one of the tasks facing the company's new senior vice-president of Danfoss High Pressure Systems, Palle Kruse.

Town looks to pipeline and desalination

The Western Australian Water Corporation plans to build desalination units before next summer to secure the water supply at Denmark after the southern Western Australian town's second driest year ever.

More desalination and reuse potential in Western Australia

Western Australia's Water Corporation is considering up to three seawater reverse-osmosis desalination plants along the southern coast of its area, known as Lower Great Southern, as part of a potential portfolio of water resources for the next 30 years.

A new reverse osmosis facility will add water supply for the city of Salalah, Oman

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.

The WateReuse awards recognise extraordinary leadership and contribution

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.

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.

The XTB Nanobubble Generator is a patented technology that can reduce energy consumption in water treatment

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.

The Sidem distillers were delivered in two major shipments direct to the project site, each one weighing 2,600 tonnes. Six of the distillers were shipped from UAE, and the other four came from China

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.

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.

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.

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.

Memco's ERI PX-180 (left) and its Isobarix replacement (right)

Second Isobarix ER unit installed in Mexico

Isobarix has installed its second commercial XPR energy-recovery unit for Memco Sistemas de Separacion SA de CV, who operate several seawater reverse-osmosis plants at resorts in Cancun and Los Cabos, Mexico.

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.

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.

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.

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.

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.

LiqTech specialises in developing technologies to clean up water and emissions from industrial sites including power plants

LiqTech International hails 'breakthrough' with Finnish industrial reuse contract

New York Stock Exchange-listed LiqTech International has hailed an "international breakthrough" after it won an industrial water reuse contract for a power plant in Finland.

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.

The Global Water Awards winners are awarded through voting by industry professionals

Suez and Middle East plants top 2018 Global Water Awards

Suez has scooped the Desalination Company of the Year Award, and Middle East facilities topped the desal plant categories at this year's Global Water Awards from Global Water Intelligence (GWI).

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).

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.

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.

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.

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.

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.

Polyethylene terephthalate (PET) is used in bottling drinks

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.

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.

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?

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.

Mehul Patel

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.

Ashwin Gulati (left) of Spiral Water receives the Innovation Award from BlueTech Research chief executive Paul O'Callaghan

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.

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.

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.

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.

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).

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.

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.

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.

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.

Hydranautics' new CPA7-LD membrane is designed to produce low permeate TDS make-up water for power stations, and the semi-conductor and pharmaceutical industries.

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.

Padre Dam plant in drought-hit California has achieved industry-leading recovery rates

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.

Aquaporin Inside membranes replicate nature's own way of filtering water using aquaporin protein

Aquaporin acquisition secures supply of membrane protein

Aquaporin of Denmark is to acquire Golgi, a company established in 2016 that is able to produce aquaporin protein in large quantities.

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.

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.

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.

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.

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. 

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.

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.

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.

New Grundfos director seeks to double Asia Pacific revenue

Pump manufacturer, Grundfos, has charged newly appointed Asia Pacific regional managing director Okay Barutçu with doubling the company's revenue in the region.

GE appoints WIBAX as Nordic water tech distributor

GE announced on 27 May 2014 that the Swedish company WIBAX Energy AB, part of the WIBAX Group, would distribute GE's water technologies in the Nordic region.

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.

Grundfos headquarters in Bjerringbro, Denmark, is the base for a global pumps business

Grundfos gains outpace global pumps market

Pumps manufacturer Grundfos has reported organic sales growth of 0.5 per cent for 2016, helped by a strong second half.

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.

Aquaporin eyes commercial membrane sales in 2013

Danish membrane treatment startup Aquaporin A/S is preparing for commercial sales of its Aquaporin Inside™ membranes by the end of 2013.

Grundfos buys American UV disinfection specialist

Danish pump manufacturer Grundfos announced on 5 June 2012 that it had acquired Enaqua, a San Diego-based company specializing in ultraviolet disinfection technology and specialized membranes for water purification.

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.

Researchers cast doubt on economics of osmotic power

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

Figure 1: Fabric in hollow fine fibre permeator of Du Pont Permasep

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.

A mixture of fixed charges, variable charges, and environmental charges for water are in use worldwide

IWA highlights levels of water consumption and tariffs globally

Households in Washington DC, US, are the biggest consumers of water compared to 169 other world cities, while households in Jinja, Uganda, use the least amount of water, a new report shows.

The Isobarix XPR pressure exchanger.

New XPR technology expands ERD market potential

Frequent starting and stopping for PX energy-recovery devices (ERDs) at a pair of power stations in Denmark, led to troubles with the pressure-exchangers, with one eventually being removed entirely from one train. In March this year, the remaining train was successfully retrofitted with an XPR ERD, which to date is working flawlessly. The author looks at the history of ERDs and the introduction of the XPR device which might open lower energy-cost markets to isobaric energy-recovery. This article first appeared in the August/September 2011 issue of Desalination & Water Reuse magazine.

IDA scholarships for PhD students in US and Singapore

The International Desalination Association (IDA) has awarded its Channabasappa Memorial Scholarship for 2011 to Errol M Glenn of the USA and Sim Siang Tze Victor of Singapore.

Australian utility left seeking wastewater dump site as locals object

Australian utility, Water Corporation, remains without an alternative dumping site for wastewater from its desalination system in Denmark, Western Australia after its original choice of a temporary site was thrown out by the local community.

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.


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